486 results on '"Inci, Fatih"'
Search Results
202. Biomimetic Membranes as an Emerging Water Filtration Technology
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Sengur-Tasdemir, Reyhan, Tutuncu, Havva Esra, Gul-Karaguler, Nevin, Ates-Genceli, Esra, Koyuncu, Ismail, Kök, Fatma N., editor, Arslan Yildiz, Ahu, editor, and Inci, Fatih, editor
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- 2019
- Full Text
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203. Modeling of Cell Membrane Systems
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Özal İldeniz, Tuğba Arzu, Kök, Fatma N., editor, Arslan Yildiz, Ahu, editor, and Inci, Fatih, editor
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- 2019
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204. Structural and Mechanical Characterization of Supported Model Membranes by AFM
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Gumí-Audenis, Berta, Giannotti, Marina I., Kök, Fatma N., editor, Arslan Yildiz, Ahu, editor, and Inci, Fatih, editor
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- 2019
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205. Applications of Lipid Membranes-based Biosensors for the Rapid Detection of Food Toxicants and Environmental Pollutants
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Nikoleli, Georgia-Paraskevi, Nikolelis, Dimitrios P., Siontorou, Christina G., Nikolelis, Marianna-Thalia, Karapetis, Stephanos, Kök, Fatma N., editor, Arslan Yildiz, Ahu, editor, and Inci, Fatih, editor
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- 2019
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206. Biomimetic Model Membranes as Drug Screening Platform
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Bilginer, Rumeysa, Arslan Yildiz, Ahu, Kök, Fatma N., editor, Arslan Yildiz, Ahu, editor, and Inci, Fatih, editor
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- 2019
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207. Modifying NiTi shape memory alloys to reduce nickel ions release through ethylenediamine plasma polymerization for biomedical applications.
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Durukan, Barkan Kagan, Sagdic, Kutay, Kockar, Benat, and Inci, Fatih
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SHAPE memory alloys , *PLASMA polymerization , *NICKEL alloys , *SHAPE memory effect , *NICKEL-titanium alloys , *SHAPE memory polymers , *HEAVY metals - Abstract
Shape memory alloys (SMAs)—a type of smart materials— offer unique benefits for constructing unique medical implants, especially for heart stents, vertebral nails, and braces. One of the widespread SMAs is nitinol (NiTi) which exhibits extraordinary shape memory ability to recover its initial form. However, due to the result of nickel (Ni2+) ions release, long-term usage of NiTi alloys would pose allergic and carcinogenic risks in orthopedics and clinical applications. To tackle these hurdles, we here demonstrate a surface modification technique via plasma polymerization in order to minimize Ni2+ ions release. NiTi substrates were initially exploited by plasma polymerization of ethylenediamine (EDA) with varying power values (25–50–75-100 W) and time rates (5–10-15 min) in order to assess the most efficient parameters for minimal toxic metal release. The samples were then tested for 14 days in a biomimicked media. As a result, 75 W-10 min plasma polymerized sample reduced Ni2+ ions release by 57.18 % compared to the base specimen. These results offer a significant outcome in deploying NiTi alloys into the biomedical field more safely through surface modifications using the plasma polymerization technique. [Display omitted] • NiTi alloys, one of SMAs, provide shape memory effect and super-elasticity. • Implementing NiTi into implants holds a key challenge— Ni2+ ion release. • Ni2+ ions release was reduced by 57.18% in 14 days compared to the control. • Surface modifications and plasma polymerization can reduce Ni2+ ions release. • This modification can be deployed to various biomedical stent applications. [ABSTRACT FROM AUTHOR]
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- 2024
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208. Plasmonic-based platforms for diagnosis of infectious diseases at the point-of-care.
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Li, Zihan, Leustean, Luca, Inci, Fatih, Zheng, Min, Demirci, Utkan, and Wang, Shuqi
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COMMUNICABLE diseases , *EMERGING infectious diseases , *SERS spectroscopy , *DIAGNOSIS , *MALARIA , *SURFACE plasmon resonance , *SURFACE chemistry - Abstract
Infectious diseases such as HIV-1/AIDS, tuberculosis (TB), hepatitis B (HBV), and malaria still exert a tremendous health burden on the developing world, requiring rapid, simple and inexpensive diagnostics for on-site diagnosis and treatment monitoring. However, traditional diagnostic methods such as nucleic acid tests (NATs) and enzyme linked immunosorbent assays (ELISA) cannot be readily implemented in point-of-care (POC) settings. Recently, plasmonic-based biosensors have emerged, offering an attractive solution to manage infectious diseases in the developing world since they can achieve rapid, real-time and label-free detection of various pathogenic biomarkers. Via the principle of plasmonic-based optical detection, a variety of biosensing technologies such as surface plasmon resonance (SPR), localized surface plasmon resonance (LSPR), colorimetric plasmonic assays, and surface enhanced Raman spectroscopy (SERS) have emerged for early diagnosis of HIV-1, TB, HBV and malaria. Similarly, plasmonic-based colorimetric assays have also been developed with the capability of multiplexing and cellphone integration, which is well suited for POC testing in the developing world. Herein, we present a comprehensive review on recent advances in surface chemistry, substrate fabrication, and microfluidic integration for the development of plasmonic-based biosensors, aiming at rapid management of infectious diseases at the POC, and thus improving global health. [ABSTRACT FROM AUTHOR]
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- 2019
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209. No effect of vancomycin powder to prevent infection in primary total knee arthroplasty: a retrospective review of 976 cases.
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Yavuz, Ibrahim Alper, Oken, Ozdamar Fuad, Yildirim, Ahmet Ozgur, Inci, Fatih, Ceyhan, Erman, and Gurhan, Utku
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VANCOMYCIN , *JOINT infections , *INFECTION prevention , *TOTAL knee replacement , *ARTHROPLASTY , *RETROSPECTIVE studies , *CASE-control method , *ANTIBIOTIC prophylaxis , *INFECTION , *ARTIFICIAL joints , *ANTIBIOTICS , *COMPLICATIONS of prosthesis , *POWDERS , *LONGITUDINAL method - Abstract
Purpose: Vancomycin powder (VP) has been used to prevent periprosthetic joint infection (PJI). However, studies investigating the efficacy of VP to prevent infection in primary total knee arthroplasty (TKA) are very rare. The purpose of this study was to investigate the efficacy of VP application to prevent PJI in TKA.Methods: Between 2012 and 2016, 976 consecutive patients who underwent primary TKA were included in the present study. Patients were divided into two groups. There were 474 patients (48.6%) in the VP group and 502 patients in the control group (51.4%). Except for VP, all procedures were the same in both groups. In the VP group, 2 g of VP was poured into the joint just before the fascia was closed. Average follow-up was 53.2 months (24-84 months).Results: Infection was found in 4 (0.84%) of 474 patients in the VP group and 5 (0.99%) of 502 patients in the control group. There was no statistically significant difference between groups in terms of infection rates (p = 0.535). Staphylococcus aureus was found in 2 patients in the VP group. Two patients had S. aureus and 1 patient had Pseudomonas aeruginosa in the control group. There was no statistically significant difference between groups in terms of demographic parameters (p > 0.05).Conclusion: Intrawound VP administration doesn't change the infection rates in primary TKA. The VP administration for preventing PJI is not recommended in primary TKA.Level Of Evidence: III. [ABSTRACT FROM AUTHOR]- Published
- 2020
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210. Comparison of palonosetron and granisetron in triplet antiemetic therapy in nonmetastatic breast cancer patients receiving high emetogenic chemotherapy: a multicenter, prospective, and observational study.
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Araz, Murat, Karaagac, Mustafa, Korkmaz, Levent, Koral, Lokman, Inci, Fatih, Beypinar, Ismail, Uysal, Mukremin, and Artac, Mehmet
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BREAST cancer patients , *BREAST cancer treatment , *SCIENTIFIC observation , *CANCER chemotherapy , *AXILLA - Abstract
Purpose: We aimed to investigate the efficacy of 0.25 mg dose of palonosetron and granisetron in triplet antiemetic prophylaxis in breast cancer patients receiving HEC.Methods: Patients with nonmetastatic breast cancer who received HEC [doxorubicin or epirubicin plus cyclophosphamide (AC/EC)] were enrolled in the study. The prophylactic triplet antiemetic regimens were used according to the doctor's preference during the first cycle of HEC as intravenous dexamethasone and palonosetron 0.25 mg or granisetron 3 mg on day 1 as well as oral aprepitant (125 mg on day 1 and 80 mg on days 2 and 3).The primary endpoint was complete response rate (CR) on acute and delayed chemotherapy-induced nausea and vomiting (CINV), separately.Results: A total of 118 female patients were included in the study. Patients received AC (83%), EC (3%), and dose-dense AC (14%) as adjuvant (88%) or neoadjuvant (12%). The majority of patients received palonosetron (59%) containing antiemetic treatment. The CR rate on acute and delayed vomiting was very high and not statistically different in both of the arms (acute 87% vs. 96%, p = 0.089; delayed 90% vs. 92%, p = 0.489), respectively. Nevertheless, the CR rate on either acute or delayed nausea was lower than vomiting (acute 51% vs. 51%; delayed 38% vs. 29%, p = 0.203; respectively).Conclusions: This is the second study that compared a 0.25 mg dose of palonosetron with first-generation setron in triplet antiemetic prophylaxis in cancer patients receiving HEC. We could not find meaningful statistical differences between two arms, regarding CR rate on acute and delayed CINV. [ABSTRACT FROM AUTHOR]- Published
- 2019
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211. Encapsulation of the Hoveyda–Grubbs 2nd generation catalyst in magnetically separable alginate/mesoporous carbon beads for olefin metathesis reactions in water
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Zeynep Tunalı, Kutay Sagdic, Fatih Inci, Bengi Özgün Öztürk, Sağdıç, Kutay, and İnci, Fatih
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Fluid Flow and Transfer Processes ,Chemistry (miscellaneous) ,Process Chemistry and Technology ,Chemical Engineering (miscellaneous) ,Catalysis - Abstract
In this study, nano-sized mesoporous carbon-supported HG2 and magnetic γ-Fe2O3 nanoparticles were encapsulated within calcium alginate gels using a one-pot procedure. Mesoporous carbon within the hydrophilic alginate shell provided hydrophobic compartments for hydrophobic olefinic substrates to conduct olefin metathesis reactions in water under an air atmosphere. Stable alginate/mesoporous carbon gel structures were obtained in the presence of a non-ionic surfactant (Tween20) with a homogenous distribution of HG2 in the gel matrix as confirmed by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis. The HG2 catalyst encapsulated in the alginate/mesoporous carbon matrix exhibited an improved performance in water, and quantitative yields were obtained in ring-closing metathesis reactions of diethyl diallylmalonate even in tap-water under the air atmosphere with no significant ruthenium and iron leaching. The catalyst can be easily separated from the reaction mixture with the aid of a magnet, and it can be reused up to 7 times in RCM reactions.
- Published
- 2022
212. Olefin metathesis in confined spaces: the encapsulation of Hoveyda–Grubbs catalyst in peanut, square, and capsule shaped hollow silica gels
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Mina Aşkun, Kutay Sagdic, Fatih Inci, Bengi Özgün Öztürk, Sağdıç, Kutay, and İnci, Fatih
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Catalysis - Abstract
In this study, Hoveyda–Grubbs 2nd generation (HG2) catalyst was encapsulated in hollow mesoporous silica gels with various morphologies (peanut, square, and capsule) by reducing the pore size of the mesoporous shell. The resulting catalytic system efficiently catalyzed the ring-closing metathesis of diethyl diallylmalonate, as well as the ethenolysis reactions of methyl oleate and fatty acid methyl ester mixtures. The interior void in hollow silica gel provided a confined isolated site for both ruthenium catalyst and olefinic substrates where the performance and recyclability in metathesis reactions were improved compared to the homogenous analogs. Finally, the catalyst could be easily recycled and used in ring-closing metathesis of diethyl diallylmalonate up to the 10th turn. In sum, this study has demonstrated that hollow silica gels are efficient materials for the encapsulation of homogenous catalysts, which improve the stability of the HG2 even under an air atmosphere, maintaining its activity for up to 6 months of storage time on the benchtop.
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- 2022
213. Kanser tedavisinin izlenmesi için mikro akışkan çip tabanlı sistemler
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Yılmaz, Eylül Gülşen and İnci, Fatih
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3D cell culture ,Silk fibroin ,Microfluidic chips ,Extracellular matrix ,Anti-cancer drug resistance ,Extracellular vesicles (EVs) ,Cancer - Abstract
Cataloged from PDF version of article. Thesis (Master's): Bilkent University, Graduate Program in Materials Science and Nanotechnology, İhsan Doğramacı Bilkent University, 2022. Includes bibliographical references (leaves 109-119). In tumor microenvironment, cancer cells are exposed to a range of fluid shear stresses (FSS); yet, current in vitro three-dimensional (3D) models have limitations to investigate the impact of biophysical stimuli on cancer mechanism and chemoresistance in a dynamic manner. In the past few decades, vital demand for exploring biological significance of mechanical forces has led to the development of several innovative approaches. One of these approaches is the integration of microfluidic systems into cancer studies. The use of microfluidic chips has garnered increasing attention since they offer ease-of-manipulation, high-throughput, less material/reagent consumption, and low-cost. On the other hand, the researches have stated explicitly that tumor-derived extracellular vesicles (EVs) regulate local and systemic milieu to drive the development and spread of cancer through nano- and micron-sized vesicles they carry. In this thesis, breast cancer cells (MCF-7) have been utilized as a model cancer system, and accordingly, they are cultivated through SF-coated microfluidic systems in order to mimic tumor microenvironment, exhibiting a more dynamic condition. Simultaneously, traditional static culture of MCF-7 cells is also performed as a control group in order to understand the impact of flow conditions. The effects of FSS on gene expression—in particular, EpCAM and CK-18 genes, which are highly expressed in MCF-7 cells— have been examined at the end of cell culturing process. In addition, cancer cells developing any resistance to anti-cancer drugs on the course of FSS have been investigated. In this regard, the cells are treated with either doxorubicin or docetaxel (anti-cancer drugs) in the cases of dynamic (microfluidic system) and static (tissue culture flask) culture conditions. Multi-Drug Resistance 1 (MDR-1) and Breast Cancer Resistance Protein (BCRP) gene expression levels have been assessed once anti-cancer treatment has been finalized. The final step of this study relies on the isolation and analysis of EVs from both static and dynamic conditions with the presence and absence of anti-cancer drug treatment. The utility of EVs has been evaluated deliberately as biomarkers for real-time monitoring of treatment efficacy. by Eylül Gülşen Yılmaz M.S.
- Published
- 2022
214. Biyobelirteç tespiti için biyomateryal entegre edilmiş meta yüzeyler
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Derin, Esma and İnci, Fatih
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Nanoisland ,Nanoplasmonic biosensor ,Enhancement ,Exosome capture ,Optical disks - Abstract
Cataloged from PDF version of article. Thesis (Master's): Bilkent University, Graduate Program in Materials Science and Nanotechnology, İhsan Doğramacı Bilkent University, 2022. Includes bibliographical references (leaves 110-132). Today, healthcare system is in the midst of a crucial transition from centralized care to self-monitoring approaches, aiming to reach more individuals; to reduce the workload in hospitals; and to minimize healthcare costs. In this regard, biosensor platforms play a mainstay role in disease diagnostics as an alternative or complementary to current interventions. However, integrating existing biosensing systems into the point-of-care (POC) settings is mostly hampered by the need for bulky instrumentation, lengthy assay procedures, and high-cost platforms. In this thesis, we aim to develop a new biosensing strategy that integrates biomaterials with metasurfaces for this manner. To achieve this aim, optical disks were recycled to obtain their inherent nanograting surfaces as the plastic substrates. Accordingly, two different types of metasurfaces were fabricated (i) by coating the plastic substrates with titanium (Ti), silver (Ag) and gold (Au), and (ii) the latter one was coated with Ag only. Poly-L-Lysine (PLL) was then integrated onto these surfaces to construct a biopolymeric adlayer. To enhance sensing characteristics, biomaterial (PLL)-integrated metasurfaces were decorated with gold nanoparticles (AuNPs), and also, nanoislands (NI) were formed on these surfaces through a chemical reduction reaction of chloroauric acid and hydroxylamine hydrochloride. To benchmark analytical performance of sensors, bulk sensitivity analysis was performed with 1%-70% glycerol solutions. In addition, exosomes were employed as model biomarkers in this study since they are released from kidneys to renal space dynamically, and they carry critical information on disease conditions, holding pivotal impact to be employed for early diagnosis of kidney diseases. With the aforementioned sensing scheme, minute concentrations of exosomes were detected over a wide-sensing area decorated with either anti-CD81 antibodies or anti-CD63 antibodies. In sum, we anticipate that this platform would resolve overwhelming challenges in cost- and complex fabrication-related challenges, and consequently, it would offer an affordable and facile-to-use diagnostic platform for this realm. by Esma Derin M.S.
- Published
- 2022
215. Akıllı malzemeler entegre edilen mikroakışkan çiplerde biyomoleküllerinin ve nadir kanser hücrelerinin yakalanması ve salınması
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Sağdıç, Kutay and İnci, Fatih
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Circulating tumor cells ,Microfluidic chips ,Smart polymeric materials ,Cancer diagnostics - Abstract
Cataloged from PDF version of article. Thesis (Master's): Bilkent University, Graduate Program in Materials Science and Nanotechnology, İhsan Doğramacı Bilkent University, 2022. Includes bibliographical references (leaves 153-176). Prevalent clinical conditions are impacting notably on our daily lives and the global economy. Healthcare system is hence garnering more interest in developing innovative material-based technologies along with accurate surface chemistry and signal generation reactions to measure biomarkers for disease diagnosis. In particular, biomedical studies focus to diagnose complex cases such as cancer. For instance, there are some critical stages in cancer development and metastasis. Moreover, impractical, invasive methods, and the restricted repertoire of targeted therapies are driving factors for researchers to find out new monitoring techniques that anticipate the future journey of cancer cells. On the other hand, the analysis of bodily fluids containing circulating tumor cells (CTCs) and biomarkers allows more insight into detecting/monitoring cancer as early as possible, and it would provide more information than that of any single-site biopsies. Yet, implementing the current technologies focusing on CTC detection and isolation in the clinics have notable challenges, i.e., expensive reagents/assays, complex operation, lengthy processes, bio-compatibility, and the need for specialized personnel. In this thesis, we have designed a microfluidic chip to hurdle these existing challenges, and for this regard, we tuned the surface area of the chip by integrating bio-mimetic smart materials (different shapes of silica particles-coated with poly(N -isopropylacrylamide). Initially, we tested our strategy with model proteins for both capture and release aspects. The smart materials were then modified with anti-EpCAM antibodies to capture human breast cancer cells (MCF-7) as a cancer model. Once the cells were captured in the chip, they were released by simply altering the 3-dimensional structure of smart materials above to lower critical solution temperature. Herein, we have anticipated that the developed platform would resolve cost, bio-compatibility, applicability, complexity, and assay duration-related challenges of current technologies in this realm. by Kutay Sağdıç M.S.
- Published
- 2022
216. Benchmarking a Microfluidic-Based Filtration for Isolating Biological Particles
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Fatih Inci and İnci, Fatih
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Benchmarking ,Extracellular Vesicles ,Microfluidics ,Electrochemistry ,Humans ,General Materials Science ,Surfaces and Interfaces ,Condensed Matter Physics ,Exosomes ,Spectroscopy ,Filtration - Abstract
Isolating particles from complex fluids is a crucial approach in multiple fields including biomedicine. In particular, biological matrices contain a myriad of distinct particles with different sizes and structures. Extracellular vesicles (EVs), for instance, are nanosized particles carrying vital information from donor to recipient cells, and they have garnered significant impact on disease diagnostics, drug delivery, and theranostics applications. Among all the EV types, exosome particles are one of the smallest entities, sizing from 30 to 100 nm. Separating such small substances from a complex media such as tissue culture and serum is still one of the most challenging steps in this field. Membrane filtration is one of the convenient approaches for these operations; yet clogging, low-recovery, and high fouling are still major obstacles. In this study, we design a two-filter-integrated microfluidic device focusing on dead-end and cross-flow processes at the same time, thereby minimizing any interfering factors on the recovery. The design of this platform is also numerically assessed to understand pressure-drop and flow rate effects over the procedure. As a model, we isolate exosome particles from human embryonic kidney cells cultured in different conditions, which also mimic complex fluids such as serum. Moreover, by altering the flow direction, we refresh the membranes for minimizing clogging issues and benchmark the platform performance for multitime use. By comprehensively analyzing the design and operation parameters of this platform, we address the aforementioned existing barriers in the recovery, clogging, and fouling factors, thereby achieving the use of a microfluidic device multiple times for bio-nanoparticle isolation without any notable issues.
- Published
- 2022
217. The role of ligand rebinding and facilitated dissociation on the characterization of dissociation rates by surface plasmon resonance (SPR) and benchmarking performance metrics
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Aykut Erbaş, Fatih Inci, Vanhaelen, Quentin, Erbaş, Aykut, and İnci, Fatih
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Off-rate ,Binding kinetics ,Facilitated dissociation ,Plasmonic sensors ,Surface chemistry ,Dissociation - Abstract
Surface plasmon resonance (SPR) is a real-time kinetic measurement principle that can probe the kinetic interactions between ligands and their binding sites, and lies at the backbone of pharmaceutical, biosensing, and biomolecular research. The extraction of dissociation rates from SPR-response signals often relies on several commonly adopted assumptions, one of which is the exponential decay of the dissociation part of the response signal. However, certain conditions, such as high density of binding sites or high concentration fluctuations near the surface as compared to the bulk, can lead to non-exponential decays via ligand rebinding or facilitated dissociation. Consequently, fitting the data with an exponential function can underestimate or overestimate the measured dissociation rates. Here, we describe a set of alternative fit functions that can take such effects into consideration along with plasmonic sensor design principles with key performance metrics, thereby suggesting methods for error-free high-precision extraction of the dissociation rates.
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- 2022
218. Recent Advances in Microneedle-Based Sensors for Sampling, Diagnosis and Monitoring of Chronic Diseases
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Yeşeren Saylan, Özgecan Erdem, Garbis Atam Akceoglu, Ismail Eş, Fatih Inci, Erdem, Özgecan, İsmail, Eş, Akceoğlu, Garbis Atam, and İnci, Fatih
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microneedles ,Computer science ,Point-of-Care Systems ,Clinical Biochemistry ,biomarkers ,General Medicine ,Review ,Biosensing Techniques ,biosensor ,Chronic disease ,Unmet needs ,Risk analysis (engineering) ,Needles ,Detection methods ,Humans ,Sampling (medicine) ,detection methods ,chronic disease ,Biomarkers ,Biosensor ,TP248.13-248.65 ,Microneedles ,Biotechnology - Abstract
Chronic diseases (CDs) are noncommunicable illnesses with long-term symptoms accounting for ~70% of all deaths worldwide. For the diagnosis and prognosis of CDs, accurate biomarker detection is essential. Currently, the detection of CD-associated biomarkers is employed through complex platforms with certain limitations in their applicability and performance. There is hence unmet need to present innovative strategies that are applicable to the point-of-care (PoC) settings, and also, provide the precise detection of biomarkers. On the other hand, especially at PoC settings, microneedle (MN) technology, which comprises micron-size needles arranged on a miniature patch, has risen as a revolutionary approach in biosensing strategies, opening novel horizons to improve the existing PoC devices. Various MN-based platforms have been manufactured for distinctive purposes employing several techniques and materials. The development of MN-based biosensors for real-time monitoring of CD-associated biomarkers has garnered huge attention in recent years. Herein, we summarize basic concepts of MNs, including microfabrication techniques, design parameters, and their mechanism of action as a biosensing platform for CD diagnosis. Moreover, recent advances in the use of MNs for CD diagnosis are introduced and finally relevant clinical trials carried out using MNs as biosensing devices are highlighted. This review aims to address the potential use of MNs in CD diagnosis.
- Published
- 2021
219. Graphene–protein field effect biosensors: glucose sensing.
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Viswanathan, Sowmya, Narayanan, Tharangattu N., Aran, Kiana, Fink, Kathryn D., Paredes, Jacobo, Ajayan, Pulickel M., Filipek, Slawomir, Miszta, Przemyslaw, Tekin, H. Cumhur, Inci, Fatih, Demirci, Utkan, Li, Pingzuo, Bolotin, Kirill I., Liepmann, Dorian, and Renugopalakrishanan, V.
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BIOSENSORS , *CHRONIC diseases , *GRAPHENE , *PROTEINS , *GLUCOSE , *ELECTRON transport - Abstract
Chronic diseases are becoming more prevalent, and the complexities of managing patients continue to escalate, since their care must be balanced between the home and clinical settings. Diabetes is the most advanced example, where self-monitoring has been shown to be necessary. Glucometers are point-of-care (POC) devices that have become standard platforms at home and clinical settings. Similarly, many other POC biosensors have also been developed. Enzymes are often used in these sensors because of their specificity and the reaction products can be electrochemically transduced for the measurement. When enzymes are immobilized to an electronically active substrate, enzymatic reactions can be transduced by direct electron transport. This paper describes an approach for the development of graphene-based POC devices. This includes modifying enzymes for improved performance, developing methods to bind them to the graphene surface, incorporation of the functionalized graphene on a field-effect transistor (FET), and integration into a microfluidic device suitable for home use. This paper describes an approach for the development of a graphene-based POC biosensor platform using glucose as an example of target molecule. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
220. A snapshot of microfluidics in point-of-care diagnostics: multifaceted integrity with materials and sensors
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Garbis Atam Akceoglu, Yeşeren Saylan, Fatih Inci, Akçeoğlu, Garbis Atam, and İnci, Fatih
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Materials science ,Point-of-care testing ,Microfluidics ,Smart materials ,Smart material ,Industrial and Manufacturing Engineering ,Snapshot (photography) ,Integrated sensors ,Biosensors ,Mechanics of Materials ,Point-of-care ,Systems engineering ,General Materials Science ,Diagnostics ,Point of care - Abstract
Over four decades, point-of-care (POC) technologies and their pivotal applications in the biomedical arena have increased irrepressibly and allowed to realize the potential of portable and accurate diagnostic strategies. Today, in the light of these advances, POC systems dominate the medical inventions and bring the diagnostics to the bedside settings, potentially minimizing the workload in the centralized laboratories, as well as remarkably reducing the associated-cost and time. In contrast to the conventional technologies, microfluidics paves the way to create more efficient and applicable POC diagnostic devices through their inherent fashions such as minute volume of samples, easy manipulations, shorter assay time, and low-cost production. In this review, the current status and advancements of microfluidic systems along with the current limitations in the aspect of POC diagnostic strategies are elaborated. Further, the integration of novel materials and innovative sensing platforms to the microfluidic systems are comprehensively evaluated to address the real-world challenges for diagnosing various maladies at the POC settings.
- Published
- 2021
221. Smart materials-integrated sensor technologies for COVID-19 diagnosis
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Fatih Inci, Esma Derin, Özgecan Erdem, Eylul Gulsen Yilmaz, Kutay Sagdic, Özgecan, Erdem, Derin, Esma, Sağdıç, Kutay, Yılmaz, Eylül Gülsen, and İnci, Fatih
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2019-20 coronavirus outbreak ,Scope (project management) ,Coronavirus disease 2019 (COVID-19) ,Renewable Energy, Sustainability and the Environment ,Sensors ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Smart materials ,Wearable computer ,COVID-19 ,Review ,Smart material ,Biomaterials ,Turnover time ,Risk analysis (engineering) ,Point-of-care ,Ceramics and Composites ,Waste Management and Disposal ,Diagnostics ,Point of care - Abstract
After the first case has appeared in China, the COVID-19 pandemic continues to pose an omnipresent threat to global health, affecting more than 70 million patients and leading to around 1.6 million deaths. To implement rapid and effective clinical management, early diagnosis is the mainstay. Today, real-time reverse transcriptase (RT)-PCR test is the major diagnostic practice as a gold standard method for accurate diagnosis of this disease. On the other side, serological assays are easy to be implemented for the disease screening. Considering the limitations of today's tests including lengthy assay time, cost, the need for skilled personnel, and specialized infrastructure, both strategies, however, have impediments to be applied to the resource-scarce settings. Therefore, there is an urgent need to democratize all these practices to be applicable across the globe, specifically to the locations comprising of very limited infrastructure. In this regard, sensor systems have been utilized in clinical diagnostics largely, holding great potential to have pivotal roles as an alternative or complementary options to these current tests, providing crucial fashions such as being suitable for point-of-care settings, cost-effective, and having short turnover time. In particular, the integration of smart materials into sensor technologies leverages their analytical performances, including sensitivity, linear dynamic range, and specificity. Herein, we comprehensively review major smart materials such as nanomaterials, photosensitive materials, electrically sensitive materials, their integration with sensor platforms, and applications as wearable tools within the scope of the COVID-19 diagnosis.
- Published
- 2021
222. Bio-Inspired Magnetic Beads For Isolation Of Sperm From Heterogenous Samples In Forensic Applications
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Mehmet Giray Ogut, George Duncan, Anirudh Avadhani, Ekin Erin Atila, Utkan Demirci, Rakhi Gupta, Merve Goksin Karaaslan, Leonard Klevan, Fatih Inci, and İnci, Fatih
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0301 basic medicine ,Forensic Genetics ,Male ,Computer science ,Cell separation ,Sample (material) ,Oligosaccharides ,Cell Separation ,Pathology and Forensic Medicine ,Effective solution ,03 medical and health sciences ,0302 clinical medicine ,Spectroscopy, Fourier Transform Infrared ,Genetics ,Humans ,030216 legal & forensic medicine ,Isolation (database systems) ,Cells, Cultured ,Sexual assault ,Forensics ,Magnetic beads ,business.industry ,Sex Offenses ,Mouth Mucosa ,Epithelial Cells ,Spermatozoa ,Microspheres ,Forensic science ,030104 developmental biology ,Embedded system ,Vagina ,Magnets ,Female ,Differential extraction ,business ,Sialyl LewisX ,Bio-inspired material - Abstract
Rapid and efficient processing of sexual assault evidence will accelerate forensic investigation and decrease casework backlogs. The standardized protocols currently used in forensic laboratories require the continued innovation to handle the increasing number and complexity of samples being submitted to forensic labs. Here, we present a new technique leveraging the integration of a bio-inspired oligosaccharide (i.e., Sialyl-Lewis(X)) with magnetic beads that provides a rapid, inexpensive, and easy-to-use strategy that can potentially be adapted with current differential extraction practice in forensics labs. This platform (i) selectively captures sperm; (ii) is sensitive within the forensic cut-off; (iii) provides a cost effective solution that can be automated with existing laboratory platforms; and (iv) handles small volumes of sample (similar to 200 mu L). This strategy can rapidly isolate sperm within 25 minutes of total processing that will prepare the extracted sample for downstream forensic analysis and ultimately help accelerate forensic investigation and reduce casework backlogs.
- Published
- 2021
223. Enhancing the nanoplasmonic signal by a nanoparticle sandwiching strategy to detect viruses
- Author
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Utkan Demirci, Amideddin Mataji-Kojouri, Yitian Zeng, Pir Ahmad Shah, Merve Goksin Karaaslan, Yeşeren Saylan, Robert Sinclair, Anirudh Avadhani, Daryl T.-Y. Lau, Fatih Inci, and İnci, Fatih
- Subjects
Nanoplasmonics ,High-throughput assays ,Materials science ,Nanoparticle ,Nanotechnology ,02 engineering and technology ,Cancer detection ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Signal ,0104 chemical sciences ,Sandwich assays ,Nanoparticles ,General Materials Science ,Resonance wavelength ,HBV diagnosis ,0210 nano-technology ,Biosensor ,Plasmon - Abstract
Nanoparticles that can assemble and bind selectively on surfaces in intricate geometries can trigger multiple plasmonic modalities and enable wide applications in agriculture such as pesticide monitoring, in medical imaging such as targeted cancer detection, in bioengineering such as biotarget detection and biosensing, and in healthcare such as selection of drugs and their binding kinetics. However, these particles mainly rely on binding of the target to a surface to create a plasmonic resonance and subsequent shifts by binding of biotargets, which limit the flexibility to control overall sensitivity. Here, we present an unconventional way that sandwiches a virus (i.e., Hepatitis B virus: HBV) topographically between two or more nanoparticles on the top and the bottom to create a double-step shifting effect amplifying the total resonance wavelength shift on the surface by 1.53 - 1.77 times that significantly enhances the sensitivity. We successfully applied this approach to an intact HBV sensing application, which accurately quantified the viral load. This method establishes a new nanoparticle-based sandwiched nanoplasmonic approach to detect and quantify viral load using two-step sensing with broad applications in biosensing.
- Published
- 2020
224. Advances in Biomimetic Systems for Molecular Recognition and Biosensing
- Author
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Yeşeren Saylan, Adil Denizli, Fatih Inci, Özgecan Erdem, Özgecan, Özgecan, and İnci, Fatih
- Subjects
Materials science ,media_common.quotation_subject ,biorecognition ,Biomedical Engineering ,Wearable computer ,Bioengineering ,Nanotechnology ,02 engineering and technology ,Review ,molecularly imprinted systems ,01 natural sciences ,Biochemistry ,Multiplexing ,lcsh:Technology ,Biomaterials ,Molecular recognition ,Biorecognition ,Function (engineering) ,media_common ,Biosensing ,lcsh:T ,010401 analytical chemistry ,biomimetic ,021001 nanoscience & nanotechnology ,Biocompatible material ,Molecularly imprinted systems ,0104 chemical sciences ,Variety (cybernetics) ,Molecular Medicine ,Biomimetic ,biosensing ,0210 nano-technology ,Molecular imprinting ,Biosensor ,Biotechnology - Abstract
Understanding the fundamentals of natural design, structure, and function has pushed the limits of current knowledge and has enabled us to transfer knowledge from the bench to the market as a product. In particular, biomimicry―one of the crucial strategies in this respect―has allowed researchers to tackle major challenges in the disciplines of engineering, biology, physics, materials science, and medicine. It has an enormous impact on these fields with pivotal applications, which are not limited to the applications of biocompatible tooth implants, programmable drug delivery systems, biocompatible tissue scaffolds, organ-on-a-chip systems, wearable platforms, molecularly imprinted polymers (MIPs), and smart biosensors. Among them, MIPs provide a versatile strategy to imitate the procedure of molecular recognition precisely, creating structural fingerprint replicas of molecules for biorecognition studies. Owing to their affordability, easy-to-fabricate/use features, stability, specificity, and multiplexing capabilities, host-guest recognition systems have largely benefitted from the MIP strategy. This review article is structured with four major points: (i) determining the requirement of biomimetic systems and denoting multiple examples in this manner; (ii) introducing the molecular imprinting method and reviewing recent literature to elaborate the power and impact of MIPs on a variety of scientific and industrial fields; (iii) exemplifying the MIP-integrated systems, i.e., chromatographic systems, lab-on-a-chip systems, and sensor systems; and (iv) closing remarks.
- Published
- 2020
225. A confirmatory test for sperm in sexual assault samples using a microfluidic-integrated cell phone imaging system
- Author
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Utkan Demirci, Mehmet Giray Ogut, Merve Goksin Karaaslan, Shreya Deshmukh, Leonard Klevan, Derek Duncan, George Duncan, Fatih Inci, and İnci, Fatih
- Subjects
0301 basic medicine ,Forensic Genetics ,Male ,medicine.medical_specialty ,Computer science ,Sample (material) ,Microfluidics ,Sexual assault ,Pathology and Forensic Medicine ,03 medical and health sciences ,0302 clinical medicine ,Phone ,Lab-On-A-Chip Devices ,Genetics ,medicine ,Humans ,Medical physics ,030216 legal & forensic medicine ,Recognition algorithm ,Cellphone imaging ,Sexual Assault Nurse Examiner ,Visual test ,Sex Offenses ,Epithelial Cells ,Sperm identification ,Spermatozoa ,Test (assessment) ,Identification (information) ,030104 developmental biology ,Screening ,Computer vision ,Female ,Smartphone ,Algorithms - Abstract
Rapid and efficient processing of sexual assault evidence to accelerate forensic investigation and decrease casework backlogs is urgently needed. Therefore, the standardized protocols currently used in forensic laboratories can benefit from continued innovation to handle the increasing number and complexity of samples being submitted to forensic labs. To our knowledge, there is currently no available rapid and portable forensic screening technology based on a confirmatory test for sperm identification in a sexual assault kit. Here, we present a novel forensic sample screening tool, i.e., a microchip integrated with a portable cell phone imaging platform that records and processes images for further investigation and storage. The platform (i) precisely and rapidly screens swab samples (95% accuracy) compared to the manual counts; (vii) provides a cost-effective and timely solution to a problem which in the past has taken a great deal of time; and (viii) handles small volumes of sample (20 mu L). This integration of the cellphone imaging platform and cell recognition algorithms with disposable microchips can be a new direction toward a direct visual test to screen and differentiate sperm from epithelial cell types in forensic samples for a crime laboratory scenario. With further development, this integrated platform could assist a sexual assault nurse examiner (SANE) in a hospital or sexual assault treatment center facility to flag sperm-containing samples prior to further downstream testing.
- Published
- 2019
226. Tunable Fano‐Resonant Metasurfaces on a Disposable Plastic‐Template for Multimodal and Multiplex Biosensing
- Author
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Sarka Southern, Shreya Kumar, Utkan Demirci, Timothy J. Henrich, Rajib Ahmed, Merve Goksin Karaaslan, Mehmet Ozgun Ozen, Nikita S. Iyer, Leonel Torres, Sadie E. Munter, Cecilia A. Prator, Cassandra Thanh, Fatih Inci, and İnci, Fatih
- Subjects
Models, Molecular ,Fabrication ,Materials science ,Surface Properties ,Microfluidics ,Molecular Conformation ,Nanotechnology ,Biosensing Techniques ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Article ,General Materials Science ,Tunable Fano resonances ,Lithography ,Plasmon ,Quantum optics ,Biosensing ,business.industry ,Mechanical Engineering ,Fano resonance ,021001 nanoscience & nanotechnology ,Point‐of‐care diagnostics ,0104 chemical sciences ,Metasurfaces ,Nanolithography ,Mechanics of Materials ,Photonics ,0210 nano-technology ,business - Abstract
Metasurfaces are engineered nanostructured interfaces that extend the photonic behavior of natural materials, and they spur many breakthroughs in multiple fields, including quantum optics, optoelectronics, and biosensing. Recent advances in metasurface nanofabrication enable precise manipulation of light-matter interactions at subwavelength scales. However, current fabrication methods are costly and time-consuming and have a small active area with low reproducibility due to limitations in lithography, where sensing nanosized rare biotargets requires a wide active surface area for efficient binding and detection. Here, a plastic-templated tunable metasurface with a large active area and periodic metal-dielectric layers to excite plasmonic Fano resonance transitions providing multimodal and multiplex sensing of small biotargets, such as proteins and viruses, is introduced. The tunable Fano resonance feature of the metasurface is enabled via chemical etching steps to manage nanoperiodicity of the plastic template decorated with plasmonic layers and surrounding dielectric medium. This metasurface integrated with microfluidics further enhances the light-matter interactions over a wide sensing area, extending data collection from 3D to 4D by tracking real-time biomolecular binding events. Overall, this work resolves cost- and complexity-related large-scale fabrication challenges and improves multilayer sensitivity of detection in biosensing applications.
- Published
- 2020
227. Shedding Light on Cellular Secrets: A Review of Advanced Optical Biosensing Techniques for Detecting Extracellular Vesicles with a Special Focus on Cancer Diagnosis.
- Author
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Küçük BN, Yilmaz EG, Aslan Y, Erdem Ö, and Inci F
- Subjects
- Humans, Biocompatible Materials chemistry, Particle Size, Surface Plasmon Resonance, Materials Testing, Optical Imaging, Extracellular Vesicles chemistry, Extracellular Vesicles metabolism, Neoplasms diagnosis, Neoplasms metabolism, Biosensing Techniques
- Abstract
In the relentless pursuit of innovative diagnostic tools for cancer, this review illuminates the cutting-edge realm of extracellular vesicles (EVs) and their biomolecular cargo detection through advanced optical biosensing techniques with a primary emphasis on their significance in cancer diagnosis. From the sophisticated domain of nanomaterials to the precision of surface plasmon resonance, we herein examine the diverse universe of optical biosensors, emphasizing their specified applications in cancer diagnosis. Exploring and understanding the details of EVs, we present innovative applications of enhancing and blending signals, going beyond the limits to sharpen our ability to sense and distinguish with greater sensitivity and specificity. Our special focus on cancer diagnosis underscores the transformative potential of optical biosensors in early detection and personalized medicine. This review aims to help guide researchers, clinicians, and enthusiasts into the captivating domain where light meets cellular secrets, creating innovative opportunities in cancer diagnostics.
- Published
- 2024
- Full Text
- View/download PDF
228. Monte Carlo simulation-guided design for size-tuned tumor spheroid formation in 3D printed microwells.
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Eş I, Ionescu AT, Görmüş BM, Inci F, Marques MPC, Szita N, and de la Torre LG
- Subjects
- Humans, HEK293 Cells, Cell Survival drug effects, Cell Culture Techniques methods, Spheroids, Cellular pathology, Printing, Three-Dimensional, Monte Carlo Method
- Abstract
Tumor spheroid models have garnered significant attention in recent years as they can efficiently mimic in vivo models, and in addition, they offer a more controlled and reproducible environment for evaluating the efficacy of cancer drugs. In this study, we present the design and fabrication of a micromold template to form multicellular spheroids in a high-throughput and controlled-sized fashion. Briefly, polydimethylsiloxane-based micromolds at varying sizes and geometry were fabricated via soft lithography using 3D-printed molds as negative templates. The efficiency of spheroid formation was assessed using GFP-expressing human embryonic kidney 293 cells (HEK-293). After 7 days of culturing, circularity and cell viability of spheroids were >0.8 and 90%, respectively. At 1500 cells/microwell of cell seeding concentration, the spheroids were 454 ± 15 μm, 459 ± 7 μm, and 451 ± 18 μm when cultured in microwells with the diameters of 0.4, 0.6, and 0.8 μm, respectively. Moreover, the distance between each microwell and surfactant treatment before cell seeding notably impacted the uniform spheroid formation. The centrifugation was the key step to collect cells on the bottom of the microwells. Our findings were further verified using a commercial microplate. Furthermore, Monte Carlo simulation confirmed the seeding conditions where the spheroids could be formed. This study showed prominent steps in investigating spheroid formation, thereby leveraging the current know-how on the mechanism of tumor growth., (© 2024 American Institute of Chemical Engineers.)
- Published
- 2024
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- View/download PDF
229. Factors affecting the success of CT-guided core biopsy of musculoskeletal lesions with a 13-G needle.
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Gataa KG, Inci F, Szaro P, and Geijer M
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- Male, Female, Humans, Retrospective Studies, Biopsy, Needle methods, Image-Guided Biopsy methods, Biopsy, Large-Core Needle, Tomography, X-Ray Computed methods, Radiography, Interventional methods
- Abstract
Objective: To determine the value of CT-guided bone core biopsy and investigate factors that affect diagnostic yield and biopsy outcome., Materials and Methods: The single-centre retrospective analysis included 447 patients who had CT-guided core biopsy with a 13-G needle (Bonopty®) from January 2016 to December 2021. Histological results or ≥ 6 months of clinical and radiological follow-up served as outcome references. A successful biopsy was classified as "diagnostic" when a definitive diagnosis was made and "adequate" when only the malignant or benign nature of the tumour could be determined. Biopsies were "nondiagnostic" when the nature of the lesion could not be determined. The occult lesions were defined as not seen on CT but visible on other modalities., Results: In 275 (62%) females and 172 (38%) males, the overall success rate was 85% (383 biopsies), with 314 (70%) diagnostic biopsies and 69 (15%) adequate biopsies. There was no relationship between biopsy success and the localisation of the lesion, length of biopsy material, or number of biopsy attempts. The lesions' nature had a statistically significant effect on biopsy success with lytic and mixed lesions having the highest success rate. Occult lesions had the lowest success rate., Conclusion: CT-guided bone core biopsy is an effective method in the workup of musculoskeletal diseases with the highest success rate in lytic and mixed lesions. No apparent relationship was found between biopsy success and biopsy length, number of attempts, or localisation of the lesion., (© 2023. The Author(s).)
- Published
- 2024
- Full Text
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230. Advancing 3D printed microfluidics with computational methods for sweat analysis.
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Ece E, Ölmez K, Hacıosmanoğlu N, Atabay M, and Inci F
- Subjects
- Sweat, Lab-On-A-Chip Devices, Printing, Three-Dimensional, Microfluidics, Nucleic Acids
- Abstract
The intricate tapestry of biomarkers, including proteins, lipids, carbohydrates, vesicles, and nucleic acids within sweat, exhibits a profound correlation with the ones in the bloodstream. The facile extraction of samples from sweat glands has recently positioned sweat sampling at the forefront of non-invasive health monitoring and diagnostics. While extant platforms for sweat analysis exist, the imperative for portability, cost-effectiveness, ease of manufacture, and expeditious turnaround underscores the necessity for parameters that transcend conventional considerations. In this regard, 3D printed microfluidic devices emerge as promising systems, offering a harmonious fusion of attributes such as multifunctional integration, flexibility, biocompatibility, a controlled closed environment, and a minimal requisite analyte volume-features that leverage their prominence in the realm of sweat analysis. However, formidable challenges, including high throughput demands, chemical interactions intrinsic to the printing materials, size constraints, and durability concerns, beset the landscape of 3D printed microfluidic devices. Within this paradigm, we expound upon the foundational aspects of 3D printed microfluidic devices and proffer a distinctive perspective by delving into the computational study of printing materials utilizing density functional theory (DFT) and molecular dynamics (MD) methodologies. This multifaceted approach serves manifold purposes: (i) understanding the complexity of microfluidic systems, (ii) facilitating comprehensive analyses, (iii) saving both cost and time, (iv) improving design optimization, and (v) augmenting resolution. In a nutshell, the allure of 3D printing lies in its capacity for affordable and expeditious production, offering seamless integration of diverse components into microfluidic devices-a testament to their inherent utility in the domain of sweat analysis. The synergistic fusion of computational assessment methodologies with materials science not only optimizes analysis and production processes, but also expedites their widespread accessibility, ensuring continuous biomarker monitoring from sweat for end-users., (© 2024. The Author(s).)
- Published
- 2024
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231. 3D Breast Cancer Model on Silk Fibroin-Integrated Microfluidic Chips.
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Yilmaz EG and Inci F
- Subjects
- Humans, Female, Microfluidics, Tissue Engineering methods, Regenerative Medicine, Biocompatible Materials chemistry, Tissue Scaffolds chemistry, Fibroins chemistry, Breast Neoplasms
- Abstract
To imitate in vivo environment of cells, microfluidics offer controllable fashions at micro-scale and enable regulate flow-related parameters precisely, leveraging the current state of 3D systems to 4D level through the inclusion of flow and shear stress. In particular, integrating silk fibroin as an adhering layer with microfluidic chips enables to form more comprehensive and biocompatible network between cells since silk fibroin holds outstanding mechanical and biological properties such as easy processability, biocompatibility, controllable biodegradation, and versatile functionalization. In this chapter, we describe design and fabrication of a microfluidic chip, with silk fibroin-covered microchannels for the formation of 3D structures, such as MCF-7 (human breast cancer) cell spheroids as a model system. All the steps performed here are characterized by surface-sensitive tools and standard tissue culture methods. Overall, this strategy can be easily integrated into various high-tech application areas such as drug delivery systems, regenerative medicine, and tissue engineering in near future., (© 2024. The Author(s), under exclusive license to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2024
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- View/download PDF
232. In situ synthesis and dynamic simulation of molecularly imprinted polymeric nanoparticles on a micro-reactor system.
- Author
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Erdem Ö, Eş I, Saylan Y, Atabay M, Gungen MA, Ölmez K, Denizli A, and Inci F
- Subjects
- Molecularly Imprinted Polymers, Molecular Docking Simulation, Serum Albumin, Bovine analysis, Polymers metabolism, Molecular Imprinting methods, Nanoparticles
- Abstract
Current practices in synthesizing molecularly imprinted polymers face challenges-lengthy process, low-productivity, the need for expensive and sophisticated equipment, and they cannot be controlled in situ synthesis. Herein, we present a micro-reactor for in situ and continuously synthesizing trillions of molecularly imprinted polymeric nanoparticles that contain molecular fingerprints of bovine serum albumin in a short period of time (5-30 min). Initially, we performed COMSOL simulation to analyze mixing efficiency with altering flow rates, and experimentally validated the platform for synthesizing nanoparticles with sizes ranging from 52-106 nm. Molecular interactions between monomers and protein were also examined by molecular docking and dynamics simulations. Afterwards, we benchmarked the micro-reactor parameters through dispersity and concentration of molecularly imprinted polymers using principal component analysis. Sensing assets of molecularly imprinted polymers were examined on a metamaterial sensor, resulting in 81% of precision with high selectivity (4.5 times), and three cycles of consecutive use. Overall, our micro-reactor stood out for its high productivity (48-288 times improvement in assay-time and 2 times improvement in reagent volume), enabling to produce 1.4-1.5 times more MIPs at one-single step, and continuous production compared to conventional strategy., (© 2023. Springer Nature Limited.)
- Published
- 2023
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- View/download PDF
233. The effects of smoking cessation on the ratios of neutrophil/lymphocyte, platelet/lymphocyte, mean platelet volume/lymphocyte and monocyte/high-density lipoprotein cholesterol.
- Author
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Inci H, Besler MS, Inci F, and Adahan D
- Subjects
- Humans, Female, Male, Adult, Middle Aged, Monocytes, Retrospective Studies, Blood Platelets, Smoking blood, Smoking epidemiology, Smoking Cessation statistics & numerical data, Cholesterol, HDL blood, Neutrophils, Lymphocytes, Mean Platelet Volume
- Abstract
The amount of smoking, level of smoking addiction and smoking cessation have effects on blood cells, blood lipid levels, neutrophil/lymphocyte ratio (NLR), platelet/lymphocyte ratio (PLR), mean platelet volume (MPV)/lymphocyte ratio (MPVLR) and monocyte/high- density lipoprotein (HDL) ratio (MHR). Methods In this self-controlled experimental study, we included individuals who applied to a smoking cessation clinic and quit smoking. Their sociodemographic and clinical characteristics, the amount of cigarettes consumed (pack/year), their Fagerstrom test for nicotine dependence (FTND) results, haemogram values before and 6 months after quitting smoking, NLR, PLR, MPVLR, MHR and blood lipid levels before and after the treatment were compared retrospectively. Results The mean (SD) age of the 239 individuals who participated in the study was 41.7 (10.9) years and 55.2% of them were women. Their mean FTND score was 7.06 (2.0), and most of them (47.7%) had a very high level of addiction. After the smoking cessation treatment, their neutrophil, platelet, MPV, red cell distribution width, platelet distribution width (PDW), cholesterol, triglyceride, low- density lipoprotein, NLR, PLR, MPVLR, MHR and HDL values increased (p<0.05). The amount of smoking and level of dependence were negatively correlated with HDL, and positively correlated with other parameters. Conclusion After smoking cessation, in addition to dyslipidaemia, the NLR, PLR, MPVLR and MHR values also decreased, and the difference was found to correlate with the level of addiction and the amount of smoking.
- Published
- 2023
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234. Xenon Difluoride Dry Etching for the Microfabrication of Solid Microneedles as a Potential Strategy in Transdermal Drug Delivery.
- Author
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Eş I, Kafadenk A, Gormus MB, and Inci F
- Subjects
- Administration, Cutaneous, Needles, Microinjections, Skin, Microtechnology, Drug Delivery Systems methods
- Abstract
Although hypodermic needles are a "gold standard" for transdermal drug delivery (TDD), microneedle (MN)-mediated TDD denotes an unconventional approach in which drug compounds are delivered via micron-size needles. Herein, an isotropic XeF
2 dry etching process is explored to fabricate silicon-based solid MNs. A photolithographic process, including mask writing, UV exposure, and dry etching with XeF2 is employed, and the MN fabrication is successfully customized by modifying the CAD designs, photolithographic process, and etching conditions. This study enables fabrication of a very dense MNs (up to 1452 MNs cm-2 ) with height varying between 80 and 300 µm. Geometrical features are also assessed using scanning electron microscopy (SEM) and 3D laser scanning microscope. Roughness of the MNs are improved from 0.71 to 0.35 µm after titanium and chromium coating. Mechanical failure test is conducted using dynamic mechanical analyzer to determine displacement and stress/strain values. The coated MNs are subjected to less displacement (≈15 µm) upon the applied force. COMSOL Multiphysics analysis indicates that MNs are safe to use in real-life applications with no fracture. This technique also enables the production of MNs with distinct shape and dimensions. The optimized process provides a wide range of solid MN types to be utilized for epidermis targeting., (© 2023 The Authors. Small published by Wiley-VCH GmbH.)- Published
- 2023
- Full Text
- View/download PDF
235. Aptamer-Based Point-of-Care Devices: Emerging Technologies and Integration of Computational Methods.
- Author
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Aslan Y, Atabay M, Chowdhury HK, Göktürk I, Saylan Y, and Inci F
- Subjects
- Point-of-Care Systems, Reproducibility of Results, DNA, Single-Stranded, Aptamers, Nucleotide chemistry, Biosensing Techniques
- Abstract
Recent innovations in point-of-care (POC) diagnostic technologies have paved a critical road for the improved application of biomedicine through the deployment of accurate and affordable programs into resource-scarce settings. The utilization of antibodies as a bio-recognition element in POC devices is currently limited due to obstacles associated with cost and production, impeding its widespread adoption. One promising alternative, on the other hand, is aptamer integration, i.e., short sequences of single-stranded DNA and RNA structures. The advantageous properties of these molecules are as follows: small molecular size, amenability to chemical modification, low- or nonimmunogenic characteristics, and their reproducibility within a short generation time. The utilization of these aforementioned features is critical in developing sensitive and portable POC systems. Furthermore, the deficiencies related to past experimental efforts to improve biosensor schematics, including the design of biorecognition elements, can be tackled with the integration of computational tools. These complementary tools enable the prediction of the reliability and functionality of the molecular structure of aptamers. In this review, we have overviewed the usage of aptamers in the development of novel and portable POC devices, in addition to highlighting the insights that simulations and other computational methods can provide into the use of aptamer modeling for POC integration.
- Published
- 2023
- Full Text
- View/download PDF
236. Systematic triage and treatment of earthquake victims: Our experience in a tertiary hospital after the 2023 Kahramanmaras earthquake.
- Author
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Özdemir G, Karlıdağ T, Bingöl O, Sarıkaya B, Çağlar C, Bozkurt İ, Akkurt MO, Mantı N, Gencer B, Biçici V, Çepni Ş, Köse CC, Doğan Ö, İnci F, Ceyhan E, Yavuz İA, Gülçek M, Alkan H, Turan S, Kılıçaslan K, Doğan M, Özkurt B, Tecimel O, Solak AŞ, Uluyardımcı E, Özaslan Hİ, Bozer M, Güven Ş, Erdem E, Ülgen NK, Aydın T, Güllerci AM, and Keskin ÖH
- Subjects
- Child, Male, Female, Humans, Adolescent, Young Adult, Adult, Middle Aged, Triage, Tertiary Care Centers, Retrospective Studies, Earthquakes, Fractures, Open, Musculoskeletal Diseases
- Abstract
Objectives: The aim of this study was to evaluate the benefits of our triage system in acceleration of intervention for the musculoskeletal injuries and clinical follow-ups of trauma patients admitted to our center after the Kahramanmaras earthquake., Patients and Methods: Between February 6
th , 2023 and February 20th , 2023, a total of 439 patients (207 males, 232 females; mean age: 37.1±19.1 years; range, 1 to 94 years) with earthquake-related musculoskeletal injuries after the Kahramanmaras earthquake were retrospectively analyzed. Data including age, sex, referral city information, removal time from the rubbles, physical examination findings, clinical photos, fasciotomy and amputation stumps and levels, and X-ray images and computed tomography images of all patients were shared and archived in the WhatsApp (Meta Platforms, Inc.® ATTN/CA, USA) group called 'Earthquake' created by orthopedic surgeons. To complete the patient interventions as soon as possible and to ensure order, the patients were distributed with the teams in order through this group by the consultant orthopedic surgeon. The treatments were applied and recorded according to the skin and soft tissue conditions, and fractures of the patients. All treatments were carried out with a multi-disciplinary approach., Results: Of the patients, 16.2% were children. Lower limb injuries constituted 59.07% of musculoskeletal injuries. Upper limb, pelvic, and spinal cord injuries were observed in 21.9%, 12.7%, and 6.25%, respectively. Conservative treatment was applied to 183 (41.68%) patients. The most common surgical intervention was debridement (n=136, 53.1%). External fixation was applied in the first stage to 21 (8.2%) patients with open fractures. The mean removal time from the rubbles was 32.1±29.38 h. A total of 118 limb fasciotomy operations were applied to the patients. Fifty limb amputations were performed in 40 patients at the last follow-up due to vascular insufficiency and infection., Conclusion: Based on our study results, we believe that a triage system using a good communication and organization strategy is beneficial to prevent treatment delay and possible adverse events in future disasters.- Published
- 2023
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237. Effect of ozone therapy on neutrophil/lymphocyte, platelet/lymphocyte ratios, and disease activity in ankylosing spondylitis: a self-controlled randomized study.
- Author
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Inci H and İnci F
- Subjects
- Biomarkers, Blood Platelets, C-Reactive Protein analysis, Humans, Lymphocytes, Neutrophils chemistry, Retrospective Studies, Ozone pharmacology, Ozone therapeutic use, Spondylitis, Ankylosing drug therapy
- Abstract
This retrospective self-controlled randomized study was carried out with the participation of 53 patients diagnosed with ankylosing spondylitis according to the modified New York criteria. The patients who did not receive medical treatment or did not change their medical treatment within the last 6 months were included in the study. There was a statistically significant decrease in the patients' neutrophil/lymphocyte ratio, platelet/lymphocyte ratio, monocyte/lymphocyte ratio, C-reactive protein, Visual Analog Scale, Bath Ankylosing Spondylitis Functional Index, and Bath Ankylosing Spondylitis Disease Activity Index scores measured after ozone therapy. There was a positive correlation between neutrophil/lymphocyte ratio, platelet/lymphocyte ratio, mean platelet volume/lymphocyte ratio, monocyte/lymphocyte ratio and C-reactive protein, Visual Analog Scale, Bath Ankylosing Spondylitis Functional Index, Bath Ankylosing Spondylitis Disease Activity Index before and after ozone therapy. Our study revealed that the changes in the decreasing tendency of the markers measured in complete blood count after ozone therapy were correlated with the disease activity, which can contribute to understand the effect of ozone therapy on biomarkers., Competing Interests: None
- Published
- 2023
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238. Label-Free Identification of Exosomes using Raman Spectroscopy and Machine Learning.
- Author
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Parlatan U, Ozen MO, Kecoglu I, Koyuncu B, Torun H, Khalafkhany D, Loc I, Ogut MG, Inci F, Akin D, Solaroglu I, Ozoren N, Unlu MB, and Demirci U
- Subjects
- Humans, Spectrum Analysis, Raman methods, Cell Line, Exosomes metabolism, Extracellular Vesicles metabolism, Neoplasms diagnosis, Neoplasms metabolism
- Abstract
Exosomes, nano-sized extracellular vesicles (EVs) secreted from cells, carry various cargo molecules reflecting their cells of origin. As EV content, structure, and size are highly heterogeneous, their classification via cargo molecules by determining their origin is challenging. Here, a method is presented combining surface-enhanced Raman spectroscopy (SERS) with machine learning algorithms to employ the classification of EVs derived from five different cell lines to reveal their cellular origins. Using an artificial neural network algorithm, it is shown that the label-free Raman spectroscopy method's prediction ratio correlates with the ratio of HT-1080 exosomes in the mixture. This machine learning-assisted SERS method enables a new direction through label-free investigation of EV preparations by differentiating cancer cell-derived exosomes from those of healthy. This approach will potentially open up new avenues of research for early detection and monitoring of various diseases, including cancer., (© 2023 Wiley-VCH GmbH.)
- Published
- 2023
- Full Text
- View/download PDF
239. Microfluidics as a Ray of Hope for Microplastic Pollution.
- Author
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Ece E, Hacıosmanoğlu N, and Inci F
- Subjects
- Humans, Plastics, Microfluidics, Ecosystem, Environmental Monitoring, Microplastics, Water Pollutants, Chemical analysis
- Abstract
Microplastic (MP) pollution is rising at an alarming rate, imposing overwhelming problems for the ecosystem. The impact of MPs on life and environmental cycles has already reached a point of no return; yet global awareness of this issue and regulations regarding MP exposure could change this situation in favor of human health. Detection and separation methods for different MPs need to be deployed to achieve the goal of reversing the effect of MPs. Microfluidics is a well-established technology that enables to manipulate samples in microliter volumes in an unprecedented manner. Owing to its low cost, ease of operation, and high efficiency, microfluidics holds immense potential to tackle unmet challenges in MP. In this review, conventional MP detection and separation technologies are comprehensively reviewed, along with state-of-the-art examples of microfluidic platforms. In addition, we herein denote an insight into future directions for microfluidics and how this technology would provide a more efficient solution to potentially eradicate MP pollution.
- Published
- 2023
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240. Isokinetic performance and function are similar after total hip arthroplasty applied with a posterior or anterolateral approach: a randomised controlled trial.
- Author
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Cankaya D, Inci F, Karakuş D, Turker HB, Kahve Y, and Neyisci C
- Subjects
- Humans, Muscle Strength physiology, Muscle, Skeletal, Range of Motion, Articular, Postoperative Period, Treatment Outcome, Arthroplasty, Replacement, Hip adverse effects, Arthroplasty, Replacement, Hip methods
- Abstract
Background: There are ongoing debates on the effects of surgical approach on outcome after total hip arthroplasty (THA). It was hypothesised that with the anterolateral approach, trauma to the abductor arm can occur and related detrimental effects can diminish the postoperative outcomes. In this first randomised controlled trial in the literature on this subject, isokinetic performance and patient-reported functional outcomes were evaluated in patients undergoing THA with a posterior approach (PA) and an anterolateral approach (ALA)., Methods: A total of 48 patients scheduled to undergo THA were randomised to ALA or PA groups. The patients were evaluated preoperatively and at 6 and 12 months postoperatively, with flexion, extension and abduction strength measurements and the Harris Hip Score (HHS). The physiatrist performing isokinetic tests and the patients were blinded to the study groups., Results: Both groups were similar in respect of age, body mass index (BMI), gender and preoperative isokinetic performance and HHS. Both groups demonstrated similar isokinetic performance ( p < 0.05) and there was no difference in HHS ( p < 0.05) at the 6- and 12-months follow-up evaluations., Conclusion: Although there is concern about potential abductor muscle damaging during ALA, the results of this randomised controlled study demonstrated that ALA can produce similar isokinetic performance and functional outcome to PA at 6 and 12 months, despite the close proximity to the abductor arm., Trial Registration Number: ClinicalTrials.gov NCT04640740 (retrospectively registered).
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- 2023
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241. Patellar resurfacing in total knee arthroplasty leads to better isokinetic performance.
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Cankaya D, Inci F, Bilekli AB, Karakus D, Kahve Y, and Erdem Y
- Subjects
- Humans, Patella surgery, Prospective Studies, Knee Joint surgery, Treatment Outcome, Arthroplasty, Replacement, Knee methods, Osteoarthritis, Knee surgery
- Abstract
Background: For decades there have been concerns about patellar resurfacing (PR) in total knee arthroplasty (TKA) and the individual preference of the surgeon is still the main determinant of whether or not resurfacing is applied. According to preference, surgeons can be categorized in 3 main groups of those who usually, selectively, or rarely resurface. The aim of this prospective, randomized, controlled study was to compare the isokinetic performance and clinical outcome of TKAs with PR and without PR., Methods: A total of 50 patients scheduled to undergo TKA for primary osteoarthritis of the knee were randomly assigned to either the PR or non-PR groups. There were no significant differences between the groups in respect of age, BMI, gender and preoperative Knee Society Score (KSS) and isokinetic performance. Patients were evaluated at postoperative 3, 6, and 12 months with KSS and at 6 months and 1 year with isokinetic measurements., Results: The PR group had a higher mean score, especially in the functional component of KSS, but the difference was not statistically significant. Knee extension peak torque was significantly higher in the PR group at 6 months (p = 0.029) and 1 year (p = 0.004) postoperatively. There were no significant differences between the groups in respect of knee flexion peak torque values following TKA., Conclusions: The results of this study demonstrated that PR during TKA is associated with better isokinetic performance and higher knee scores. These results support routine/usually resurfacing of the patella. For surgeons who selectively resurface the patella, the advantage of better isokinetic performance may be taking into consideration in favor of resurfacing the patella where they are undecided., Level of Evidence: Level I, therapeutic study., Competing Interests: Declaration of competing interest The authors declare that they have no conflict of interest., (Copyright © 2021 The Japanese Orthopaedic Association. Published by Elsevier B.V. All rights reserved.)
- Published
- 2023
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242. Influence of direct radiography in decision making during orthopaedic trauma surgery: A prospective study.
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Yavuz IA, Gurhan U, Ceyhan E, Inci F, Oken OF, Yildirim AO, and Ozkale Yavuz O
- Abstract
Objective: To evaluate the effects of intraoperative direct radiography on the change in the patient's treatment and the reliability of fluoroscopy in orthopaedic trauma surgery operations., Methods: A total of 773 fractures were evaluated prospectively. The surgeons involved in the case were divided into three groups according to their experiences: less than 5 years, 5-10 years and over 10 years. After each case, the fracture classification, whether any interventions were made after the X-ray, and the interventions were recorded., Results: There were 312(40%) intra-articular, 200(26%) metaphyseal, 161(21%) diaphyseal, 81(10%) pelvis-acetabulum, and 19(3%) vertebrae fractures. Surgeons needed to intervene in 71(9.2%) cases after direct-radiography. There was a significant difference between the location of the fracture and the number of interventions (p < 0.001). The most frequent interventions were intra-articular distal radius, acetabulum and intra-articular calcaneus fractures, respectively. Surgeons with more than 10 years of the experience felt the need to make fewer changes, it was statistically significant compared to the other two groups (p = 0.001 for both)., Conclusion: It was found that the final evaluation with x-ray images before the operation was completed in trauma surgery affected the surgeon's decision. In particular, intra-articular fractures, acetabular fractures, and vertebral fractures are recommended to evaluate fixation with direct radiography in addition to fluoroscopy images before ending the operation., Level of Evidence: LEVEL III., Competing Interests: The authors declare that they have no conflict of interest., (© 2022 Professor P K Surendran Memorial Education Foundation. Published by Elsevier B.V. All rights reserved.)
- Published
- 2022
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243. Is single-stage minimally invasive plate fixation safe in open distal radius fractures with metadiaphyseal involvement?: Retrospective evaluation of 54 patients.
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İnci F and Yavuz İA
- Subjects
- Humans, Retrospective Studies, Minimally Invasive Surgical Procedures methods, Treatment Outcome, Bone Plates, Fracture Fixation, Internal methods, Fracture Healing, Fractures, Open surgery, Radius Fractures diagnostic imaging, Radius Fractures surgery, Fractures, Closed
- Abstract
Objective: The aim of this study was to evaluate the safety and results of one-stage surgery in Gustilo grade 1 and 2 open distal radius fractures with metadiaphyseal involvement., Methods: This retrospective study included 54 patients with AO-2R3 and metadiaphyseal involvement according to the AO fracture classification. All fractures were treated with a long volar plate using the minimally invasive plate osteosynthesis (MIPO) technique. The patients were divided into two groups as open fracture group (25 patients) and closed fracture group (29 patients), and the groups were compared for their union time and complications and functional and radiological results., Results: There was no statistically significant difference between the groups in terms of clinical and radiographic results (P > .05 for both). The mean union time was 12.77 (range, 8-20) weeks in the open fracture group and 12.75 (range, 8-18) weeks in the closed fracture group. There was no statistically significant difference between the groups in terms of union time (P > .05). Moreover, there was no statistically significant difference between the two groups in terms of major and minor complications. All fractures healed without the need for bone and/or soft tissue grafts., Conclusion: As a result of this study, using with long volar plate immediately minimally invasive plate osteosynthesis might be safely used as a single-stage definitive treatment for Gustilo grade 1 and 2 open distal radius fractures with metadiaphyseal involvement., Level of Evidence: Level IV, Therapeutic Study.
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- 2022
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244. The Impact of Surgical Approaches for Isolated Acetabulum Fracture on Sexual Functions: A Prospective Study.
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Yavuz IA, Aykanat C, Senel C, Inci F, Ceyhan E, Aslan Y, Tuncel A, and Yildirim AO
- Subjects
- Acetabulum injuries, Acetabulum surgery, Adult, Female, Fracture Fixation, Internal adverse effects, Humans, Male, Middle Aged, Prospective Studies, Treatment Outcome, Fractures, Bone surgery, Hip Fractures surgery, Spinal Fractures
- Abstract
Objectives: To investigate the effects of surgical modalities for isolated acetabular fractures on the sexual functions of patients and their partners., Design: Prospective., Setting: Level I trauma centre., Patients/participants: Sixty-five patients who had undergone open reduction and internal fixation because of isolated acetabular fractures who were sexually active before, together with their partners., Intervention: Patients operated on for isolated acetabular fractures were divided into 3 groups according to surgical approaches: the Kocher-Langenbeck approach (n = 36), ilioinguinal approach (n = 16), and modified Stoppa approach (n = 13)., Main Outcome Measurements: Sexual functions of patients and their partners were evaluated with the 5-item version of the International Index of Erectile Function score and Female Sexual Function Index score preoperatively and at the postoperative first year after the rehabilitation period., Results: The mean age of the patients was 41.8 ± 13.0 (18-69) years. In male patients, the mean 5-item version of the International Index of Erectile Function score had changed from 24.3 to 20.0 at the postoperative first year and the decrease in sexual function scores was less with the Kocher-Langenbeck approach. In female patients, the Female Sexual Function Index scores had decreased statistically significantly from 24.9 to 18.3 at the postoperative first year, but there was no statistically significant difference between surgical groups. Both male and female patients' partners' sexual function scores were also decreased at the postoperative first year., Conclusions: As a result of our study, it was observed that the posterior approach is more advantageous than anterior approaches in preserving the sexual functions of male patients in acetabular fracture surgery. However, the surgical approach did not affect the sexual functions of female patients., Level of Evidence: Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence., Competing Interests: The authors report no conflict of interest., (Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2022
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245. Benchmarking a Microfluidic-Based Filtration for Isolating Biological Particles.
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Inci F
- Subjects
- Benchmarking, Filtration, Humans, Microfluidics, Exosomes, Extracellular Vesicles
- Abstract
Isolating particles from complex fluids is a crucial approach in multiple fields including biomedicine. In particular, biological matrices contain a myriad of distinct particles with different sizes and structures. Extracellular vesicles (EVs), for instance, are nanosized particles carrying vital information from donor to recipient cells, and they have garnered significant impact on disease diagnostics, drug delivery, and theranostics applications. Among all the EV types, exosome particles are one of the smallest entities, sizing from 30 to 100 nm. Separating such small substances from a complex media such as tissue culture and serum is still one of the most challenging steps in this field. Membrane filtration is one of the convenient approaches for these operations; yet clogging, low-recovery, and high fouling are still major obstacles. In this study, we design a two-filter-integrated microfluidic device focusing on dead-end and cross-flow processes at the same time, thereby minimizing any interfering factors on the recovery. The design of this platform is also numerically assessed to understand pressure-drop and flow rate effects over the procedure. As a model, we isolate exosome particles from human embryonic kidney cells cultured in different conditions, which also mimic complex fluids such as serum. Moreover, by altering the flow direction, we refresh the membranes for minimizing clogging issues and benchmark the platform performance for multitime use. By comprehensively analyzing the design and operation parameters of this platform, we address the aforementioned existing barriers in the recovery, clogging, and fouling factors, thereby achieving the use of a microfluidic device multiple times for bio-nanoparticle isolation without any notable issues.
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- 2022
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246. Unifying the Efforts of Medicine, Chemistry, and Engineering in Biosensing Technologies to Tackle the Challenges of the COVID-19 Pandemic.
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Erdem Ö, Eş I, Saylan Y, and Inci F
- Subjects
- Engineering, Humans, Pandemics, SARS-CoV-2, Technology, COVID-19
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- 2022
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247. The Yin and Yang of exosome isolation methods: conventional practice, microfluidics, and commercial kits.
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Shirejini SZ and Inci F
- Subjects
- Biomarkers, Lab-On-A-Chip Devices, Microfluidics, Exosomes metabolism, Extracellular Vesicles metabolism
- Abstract
Exosomes are a subset of extracellular vesicles released from various cells, and they can be found in different bodily fluids. Exosomes have been utilized as biomarkers to diagnose many diseases and to monitor therapy efficiency as they represent the status and origin of the cell, which they are released from. Considering that they co-exist in bodily fluids with other types of particles, their isolation still remains challenging since conventional methods are time-consuming, user-dependent, and result in low isolation yield. This review summarizes the conventional strategies and microfluidic-based methods for exosome isolation along with their strengths and limitations. In particular, microfluidic devices emerge as a promising approach to tackle the existing limitations of conventional methods, and they provide unique features, such as operating with minute volume of samples and rapid process, in order to isolate exosomes with the high yield and the high purity, which make them unprecedented tools for molecular biology and clinical applications in exosome research. This review further elaborates on the existing microfluidic-based exosome isolation methods and denotes their benefits and drawbacks. Herein, we also introduce various commercially available platforms and kits for exosome isolation along with their working principles., (Copyright © 2021 Elsevier Inc. All rights reserved.)
- Published
- 2022
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248. The Role of Ligand Rebinding and Facilitated Dissociation on the Characterization of Dissociation Rates by Surface Plasmon Resonance (SPR) and Benchmarking Performance Metrics.
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Erbaş A and Inci F
- Subjects
- Benchmarking, Binding Sites, Biosensing Techniques, Kinetics, Ligands, Surface Plasmon Resonance
- Abstract
Surface plasmon resonance (SPR) is a real-time kinetic measurement principle that can probe the kinetic interactions between ligands and their binding sites, and lies at the backbone of pharmaceutical, biosensing, and biomolecular research. The extraction of dissociation rates from SPR-response signals often relies on several commonly adopted assumptions, one of which is the exponential decay of the dissociation part of the response signal. However, certain conditions, such as high density of binding sites or high concentration fluctuations near the surface as compared to the bulk, can lead to non-exponential decays via ligand rebinding or facilitated dissociation. Consequently, fitting the data with an exponential function can underestimate or overestimate the measured dissociation rates. Here, we describe a set of alternative fit functions that can take such effects into consideration along with plasmonic sensor design principles with key performance metrics, thereby suggesting methods for error-free high-precision extraction of the dissociation rates., (© 2022. Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2022
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249. The development of musculoskeletal radiology for 100 years as presented in the pages of Acta Radiologica .
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Geijer M, Inci F, Solidakis N, Szaro P, and Al-Amiry B
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- Angiography history, Arthrography history, Bone Neoplasms diagnostic imaging, Bone Neoplasms history, Fractures, Bone diagnostic imaging, Fractures, Bone history, History, 20th Century, History, 21st Century, Magnetic Resonance Imaging history, Muscle Neoplasms diagnostic imaging, Muscle Neoplasms history, Nuclear Medicine history, Radiology, Interventional history, Tomography, X-Ray Computed history, Tuberculosis, Osteoarticular diagnostic imaging, Tuberculosis, Osteoarticular history, Ultrasonography history, Musculoskeletal System diagnostic imaging, Periodicals as Topic history, Radiology history
- Abstract
During the last 100 years, musculoskeletal radiology has developed from bone-only radiography performed by everyone to a dedicated subspecialty, still secure in its origins in radiography but having expanded into all modalities of imaging. Like other subspecialties in radiology, it has become heavily dependent on cross-sectional and functional imaging, and musculoskeletal interventions play an important role in tumor diagnosis and treatment and in joint diseases. All these developments are reflected in the pages in Acta Radiologica , as shown in this review.
- Published
- 2021
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250. Recent Advances in Microneedle-Based Sensors for Sampling, Diagnosis and Monitoring of Chronic Diseases.
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Erdem Ö, Eş I, Akceoglu GA, Saylan Y, and Inci F
- Subjects
- Chronic Disease, Humans, Biosensing Techniques, Needles, Point-of-Care Systems
- Abstract
Chronic diseases (CDs) are noncommunicable illnesses with long-term symptoms accounting for ~70% of all deaths worldwide. For the diagnosis and prognosis of CDs, accurate biomarker detection is essential. Currently, the detection of CD-associated biomarkers is employed through complex platforms with certain limitations in their applicability and performance. There is hence unmet need to present innovative strategies that are applicable to the point-of-care (PoC) settings, and also, provide the precise detection of biomarkers. On the other hand, especially at PoC settings, microneedle (MN) technology, which comprises micron-size needles arranged on a miniature patch, has risen as a revolutionary approach in biosensing strategies, opening novel horizons to improve the existing PoC devices. Various MN-based platforms have been manufactured for distinctive purposes employing several techniques and materials. The development of MN-based biosensors for real-time monitoring of CD-associated biomarkers has garnered huge attention in recent years. Herein, we summarize basic concepts of MNs, including microfabrication techniques, design parameters, and their mechanism of action as a biosensing platform for CD diagnosis. Moreover, recent advances in the use of MNs for CD diagnosis are introduced and finally relevant clinical trials carried out using MNs as biosensing devices are highlighted. This review aims to address the potential use of MNs in CD diagnosis.
- Published
- 2021
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