27 results on '"Pavithra, A."'
Search Results
2. Pathology Reporting Template
- Author
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B, Archana, Pavithra, V., Joseph, Leena Dennis, Dev, Bhawna, editor, and Joseph, Leena Dennis, editor
- Published
- 2023
- Full Text
- View/download PDF
3. Overview of Immunohistochemistry in Breast Lesions
- Author
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Pavithra, V., Sundaram, Sandhya, B, Archana, Dev, Bhawna, editor, and Joseph, Leena Dennis, editor
- Published
- 2023
- Full Text
- View/download PDF
4. Role of DCE and DWI in Differentiating between Benign and Malignant Breast Masses using 3T MRI: A Cross-sectional Study
- Author
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A Pavithra, P Sabari Arasu, N Jayaprakash, and S Arun Kumar
- Subjects
breast cancer ,dynamic contrast-enhanced ,diffusion-weighted image ,histopathology ,magnetic resonance imaging ,mammography ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Surgery ,RD1-811 - Abstract
Introduction: Dynamic Contrast-enhanced Magnetic Resonance Imaging (DCE-MRI) imaging is the mainstay of breast MRI techniques in characterising breast masses. Diffusion-weighted Imaging (DWI) is an adjunct MRI technique to differentiate between benign and malignant breast masses. Aim: To evaluate the diagnostic efficacy of breast MRI by combining DCE-MRI and DWI to differentiate benign from malignant breast masses and compare it with histopathology. Materials and Methods: The present cross-sectional study was conducted in the Department of Radiology and Imaging, Bharat Scans private limited, Chennai, India, from July 2013 to April 2015. A total of 51 patients with suspicious breast masses detected by mammography and/or ultrasonography were evaluated by DCE-MRI and DWI using General Electric (GE) 3 Tesla Magnetic Resonance Imaging. The results were compared with histopathology. Sensitivity, specificity, Positive Predictive Value (PPV) and Negative Predictive Values (NPV) were calculated for DCE-MRI and for the combined method using DCE-MRI with DWI. Statistical analysis was done using Statistical Package for the Social Sciences (SPSS) software version 17.0 and Open Epi software. A p-value
- Published
- 2023
- Full Text
- View/download PDF
5. Targeting altered calcium homeostasis and uncoupling protein‐2 promotes sensitivity in drug‐resistant breast cancer cells.
- Author
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Balakrishnan, Pavithra, Arasu, Ashok, and Velusamy, Thirunavukkarasu
- Subjects
INTRACELLULAR calcium ,CANCER cells ,METASTATIC breast cancer ,DRUG resistance in cancer cells ,BREAST cancer ,CALCIUM ,ERIBULIN - Abstract
Metastatic breast cancer has the highest mortality rate among women owing to its poor clinical outcomes. Metastatic tumors pose challenges for treatment through conventional surgery or radiotherapy because of their diverse organ localization and resistance to various cytotoxic agents. Chemoresistance is a significant obstacle to effective breast cancer treatment owing to cancer's heterogeneous nature. Abnormalities in intracellular calcium signaling, coupled with altered mitochondrial metabolism, play a significant role in facilitating drug resistance and contribute to therapy resistance. Uncoupling protein‐2 (UCP2) is considered as a marker of chemoresistance and is believed to play a major role in promoting metabolic shifts and tumor metastasis. In this context, it is imperative to understand the roles of altered calcium signaling and metabolic switching in the development of chemotherapeutic resistance. This study investigates the roles of UCP2 and intracellular calcium signaling (Ca2+) in promoting chemoresistance against cisplatin. Additionally, we explored the effectiveness of combining genipin (GP, a compound that reverses UCP2‐mediated chemoresistance) and thapsigargin (TG, a calcium signaling modulator) in treating highly metastatic breast cancers. Our findings indicate that both aberrant Ca2+ signaling and metabolic shifts in cancer cells contribute to developing drug‐resistant phenotypes, and the combination treatment of GP and TG significantly enhances drug sensitivity in these cells. Collectively, our study underscores the potential of these drug combinations as an effective approach to overcome drug resistance in chemoresistant cancers. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
6. Breast Cancer Detection Using Random Forest Classifier
- Author
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Judith Justin, Pavithra Suchindran, and R. Vanithamani
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Computer science ,business.industry ,Pattern recognition ,02 engineering and technology ,medicine.disease ,Random forest ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,030220 oncology & carcinogenesis ,0202 electrical engineering, electronic engineering, information engineering ,medicine ,020201 artificial intelligence & image processing ,Artificial intelligence ,business - Abstract
Breast cancer is the second most prevalent type of cancer among women. Breast ultrasound (BUS) imaging is one of the most frequently used diagnostic tools to detect and classify abnormalities in the breast. To improve the diagnostic accuracy, computer-aided diagnosis (CAD) system is helpful for breast cancer detection and classification. Normally, a CAD system consists of four stages: pre-processing, segmentation, feature extraction, and classification. In this chapter, the pre-processing step includes speckle noise removal using speckle reducing anisotropic diffusion (SRAD) filter. The goal of segmentation is to locate the region of interest (ROI) and active contour-based segmentation and fuzzy C means segmentation (FCM) are used in this work. The texture features are extracted and fed to a classifier to categorize the images as normal, benign, and malignant. In this work, three classifiers, namely k-nearest neighbors (KNN) algorithm, decision tree algorithm, and random forest classifier, are used and the performance is compared based on the accuracy of classification.
- Published
- 2022
7. Prediction and Classification of Breast Cancer Using Discriminative Learning Models and Techniques
- Author
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T. Ananth Kumar, R. Rajmohan, R. Ramya, and M. Pavithra
- Subjects
Breast cancer ,Artificial neural network ,Computer science ,business.industry ,medicine ,Pattern recognition ,Encoder decoder ,Artificial intelligence ,medicine.disease ,business ,Discriminative learning - Published
- 2021
8. Immunohistochemical analysis of ki 67 in breast carcinoma- A survey in Indian population
- Author
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Sandhya Sundaram, Karunagaran, S Sabhari Priya, and V Pavithra
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Oncology ,medicine.medical_specialty ,biology ,medicine.drug_class ,business.industry ,Cancer ,medicine.disease ,Surgical pathology ,Breast cancer ,Hormone receptor ,Estrogen ,Ki-67 ,Internal medicine ,medicine ,biology.protein ,Biomarker (medicine) ,Breast carcinoma ,business - Abstract
Background: Breast cancers are widely prevalent in females worldwide and their diagnosis is effectively facilitated by the analysis of various hormone receptors and certain biomarkers. One of the key biomarkers is the proliferation marker Ki-67 which is a nucleoprotein used for predicting these cancers. This study was carried out to analyse the pattern of presentation of Ki-67 in breast cancer. Materials and Methods: This cross-sectional, retrospective, record based study was carried out among 100 resected breast cancer specimens. Haemotoxylin and Eosin stained slide cut from formalin fixed paraffin wax embedded, resected specimens of breast carcinoma were analyzed. The histological diagnosis of tumor was diagnosed as per WHO classification. The positive or negative immunohistochemical expression of Estrogen, progesterone and Androgen receptors in addition were evaluated using standard protocol. Ki-67 expression was also analyzed and correlated with the hormonal receptor presentation. Results: Ki-67 was graded as 14%. Significantly high expression of Ki-67 was witnessed in 61% of the specimens. As far as the other biomarkers were examined, negative expressions of ER, PR, Her2neu and AR were strongly correlating to Ki-67 [removed]90.5%. 86.8%, 81.1% and 100%) respectively. However, the observed difference was statistically not significant when compared to the other biomarkers but statistically significant as an independent prognostic marker. Conclusion: Our study has succinctly elaborated that Ki-67 can be used as an efficient and independent biomarker to determine the survival outcomes of breast cancers. Considering its role in establishing therapeutic protocols, further research is required to evaluate the impact of Ki-67 expression at the molecular level. Keywords: Breast cancer, Biomarkers, Hormone receptors, Ki- 67, Immunohistochemistry.
- Published
- 2020
9. Altered Glycan Expression on Breast Cancer Cells Facilitates Infection by T3 Seroptype Oncolytic Reovirus
- Author
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Andra C. Dumitru, Danahe Mohammed, Melanie Koehler, David Alsteens, Terence S. Dermody, Pavithra Aravamudhan, and Danica M. Sutherland
- Subjects
Glycan ,Cancer therapy ,Bioengineering ,Breast Neoplasms ,Reoviridae ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,Polysaccharides ,Medicine ,Humans ,General Materials Science ,030304 developmental biology ,Infectivity ,0303 health sciences ,biology ,business.industry ,Mechanical Engineering ,Cancer ,General Chemistry ,Condensed Matter Physics ,medicine.disease ,3. Good health ,Oncolytic virus ,carbohydrates (lipids) ,030220 oncology & carcinogenesis ,Cancer cell ,Cancer research ,biology.protein ,Female ,Breast cancer cells ,business - Abstract
Breast cancer is the most common cancer in women. Although current therapies have increased survival rates for some breast cancer types, other aggressive invasive breast cancers remain difficult to treat. As the onset of breast cancer is often associated with the appearance of extracellular markers, these could be used to better target therapeutic agents. Here, we demonstrated by nanobiophysical approaches that overexpression of α-sialylated glycans in breast cancer provides an opportunity to combat cancer cells with oncolytic reoviruses. Notably, a correlation between cellular glycan expression and the mechanical properties of reovirus attachment and infection is observed in a serotype-dependent manner. Furthermore, we enhance the infectivity of reoviruses in malignant cells by the coinjection of α-sialylated glycans. In conclusion, this study supports both the use of reoviruses as an oncolytic agent in nanomedicine and the role of α-sialylated glycans as adjuvants in oncolysis, offering new perspective in oncolytic cancer therapy.
- Published
- 2021
10. Breast Cancer Classification using the Supervised Learning Algorithms
- Author
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Kavipraba R, Preethi S, Deepa R, Sri Rakshitha A K, and Pavithra G
- Subjects
Artificial neural network ,Computer science ,business.industry ,Supervised learning ,Pattern recognition ,medicine.disease ,Linear discriminant analysis ,Support vector machine ,Breast cancer ,Binary classification ,medicine ,Artificial intelligence ,Precision and recall ,Breast cancer classification ,business - Abstract
Breast cancer (BC) has been the second largest cause of death for women around the world for the past few years. BC is characterized by the chronic pain, genes mutation, color (redness), changes in the size and texture of the skin. BC classification helps clinicians to find a comprehensive and accurate response to treatment, with the most common binary classification (benign / malignant cancer). Nowadays, the Machine Learning (ML) techniques are commonly used in the case of classification of breast cancer. They support with high classification accuracy and rapid evaluation technologies. The proposed research work is mainly focused on supervised learning algorithm, which uses four distinct classifiers: K-Nearest Neighbor (KNN), Weighted K-Nearest Neighbor (WKNN), Support Vector Machine (SVM), Linear Discriminant Analysis (LDA) and Artificial Neural Network (ANN) for the classification of breast cancer. Also, this research work suggests the difference between the aforementioned classifiers and determines their accuracy. The performance of the classifier is assessed based on its accuracy, sensitivity, specificity, precision and recall. Results indicate that, ANN provides the highest accuracy of 97.60% than the other classifiers.
- Published
- 2021
11. Serum Levels of Metal Ions in Female Patients with Breast Cancer
- Author
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Pavithra V., Sathisha T.G., K. Kasturi, D. Siva Mallika, S. Jeevan Amos, and Ragunatha S
- Subjects
breast cancer ,calcium ,copper ,iron ,magnesium ,phosphorous ,zinc ,Medicine - Abstract
Background: Breast cancer is the second commonest form of cancer among women. Several studies have been conducted to identify potential risk factors. However, role of trace elements or metals in causing breast cancer has not been studied to great extent. Aims: To estimate the serum levels of calcium, copper, magnesium, iron, phosphorus and zinc and determine their role in causing breast cancer in female patients. Settings and Design: A case-control study on female patients with breast cancer was conducted in a private superspecialty hospital and Cancer centre situated in Southern part of India. Materials and Methods: Newly diagnosed female patients with breast cancer in the age group of 30-60 y attending Oncology clinic were included in the study. These cases were selected irrespective of type and stage of the disease. The age matched control subjects were drawn from apparently healthy women attending master health check at superspecialty hospital. The patients or controls suffering from co-morbid conditions which affect serum levels of metal ions and other malignancies, and those undergoing treatment for breast cancer were excluded from the study. Serum was separated and tests were performed according to standard procedure for each metal ion on the same day. The estimation of metal ions was done by UV-Visible Spectrophotometer-CHEM 7. Statistical Analysis: Independent Samples T-test was used to calculate difference between the two means. The p-value of
- Published
- 2015
- Full Text
- View/download PDF
12. Women’s Values and Preferences Regarding Osteoporosis Treatments: A Systematic Review
- Author
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Ana Castaneda-Guarderas, Patricia Barrionuevo, Maria Sarigianni, Pavithra R. Bora, Khalid Benkhadra, Khaled Mohammed, Mohammad Hassan Murad, Michael R. Gionfriddo, and Claudia Zeballos-Palacios
- Subjects
medicine.medical_specialty ,Pharmacological therapy ,Endocrinology, Diabetes and Metabolism ,Decision Making ,Clinical Biochemistry ,Osteoporosis ,MEDLINE ,Biochemistry ,Endocrinology ,Breast cancer ,Internal medicine ,medicine ,Oral route ,Vitamin D and neurology ,Humans ,Dosing ,Adverse effect ,Osteoporosis, Postmenopausal ,Bone Density Conservation Agents ,business.industry ,Clinical Practice Guideline Systematic Review ,Biochemistry (medical) ,Patient Preference ,medicine.disease ,Family medicine ,Female ,business ,Osteoporotic Fractures - Abstract
Background Several treatments are available to reduce the risk of fragility fractures associated with osteoporosis. The choice of treatment requires knowledge of patients’ values and preferences. The aim of the present study was to summarize what is known about the values and preferences relevant to the management of osteoporosis in women. Methods We conducted a comprehensive search of several databases for studies reported in any language that had included women who had already started or were about to start any pharmacological therapy for osteoporosis. Pairs of reviewers independently selected the studies and extracted the data. The results were synthesized narratively. Results We included 26 studies reporting on 15,348 women (mean age, 66 years). The women considered the effectiveness and adverse events equally, followed by the convenience of taking the drug and its effect on daily routine (less frequent dosing was preferred, the oral route was preferred, and the injectable route was preferred over oral if given less frequently). The treatment cost and duration were less important factors for decision making. Fear of breast cancer and fear of resuming uterine bleeding were common reasons for not choosing estrogen therapy. Calcium and vitamin D were viewed as safe and natural. Across the studies, the preferences were not affected by age, previous drug exposure, or employment status. Conclusions Women starting osteoporosis medications value effectiveness and side effects equally and prefer medications given less frequently. Injectable drugs appear acceptable if given less frequently. More research on patient values and preferences is needed to guide decision making in osteoporosis.
- Published
- 2019
13. Current trends and opportunities in targeting p21 activated kinase-1(PAK1) for therapeutic management of breast cancers
- Author
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Suresh K. Rayala, Ganesh Venkatraman, Roshni Saravanan, Sandhya Sundaram, V Pavithra, and Rahul Kanumuri
- Subjects
0301 basic medicine ,MAPK/ERK pathway ,Cell Survival ,Apoptosis ,Breast Neoplasms ,Biology ,03 medical and health sciences ,0302 clinical medicine ,PAK1 ,Breast cancer ,Cell Line, Tumor ,Genetics ,medicine ,Animals ,Humans ,Protein kinase B ,PI3K/AKT/mTOR pathway ,Cell Proliferation ,Cell growth ,Kinase ,Cancer ,General Medicine ,medicine.disease ,030104 developmental biology ,p21-Activated Kinases ,030220 oncology & carcinogenesis ,Cancer research ,Female ,Signal Transduction - Abstract
Breast cancer is the most frequently diagnosed cancer in women worldwide. Identifying reliable biomarkers and druggable molecular targets pose to be a significant quest in breast cancer research. p21-activated kinase 1 (PAK1) is a serine/threonine kinase that direct cell motility, cytoskeletal remodelling, and has been shown to function as a downstream regulator for various cancer signalling cascades that promote cell proliferation, apoptosis deregulation and hasten mitotic abnormalities, resulting in tumor formation and progression. The heterogeneity and acquired drug resistance are important factors that challenge the treatment of breast cancer. p21-activated kinase 1 signalling is crucial for activation of the Ras/RAF/MEK/ERK, PI3K/Akt/mTOR and Wnt signalling cascades which regulate cell survival, cell cycle progression, differentiation, and proliferation. A study involving proteogenomics analysis on breast cancer tissues showed the PAK1 as outlier kinase. In addition to this, few outlier molecules were identified specific to subtypes of breast cancer. A few substrates of PAK1 in breast cancer are already known. In this paper, we have discussed a similar approach called Kinase Interacting Substrate Screening (KISS) for the identification of novel oncogenic substrates of p21-activated kinase specific to subtypes of breast cancer. Such high throughput approaches are expected to accelerate the process of identifying novel drug targets and biomarkers.
- Published
- 2020
14. The Effect of Thermography on Breast Cancer Detection-A Survey
- Author
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Ramachandran Manikandan, Kattur Soundarapandian Ravichandran, K. R. Sekar, and PR Pavithra
- Subjects
Oncology ,medicine.medical_specialty ,business.industry ,Pharmaceutical Science ,Cancer ,Early detection ,Abnormal cell ,02 engineering and technology ,medicine.disease ,Modern language association ,020303 mechanical engineering & transports ,Breast cancer ,0203 mechanical engineering ,Internal medicine ,Thermography ,0202 electrical engineering, electronic engineering, information engineering ,medicine ,Infrared thermal imaging ,020201 artificial intelligence & image processing ,Screening tool ,business - Abstract
Image processing technique in general, involves the application of signal processing on the input image for isolating the individual color plane of an image. Cancer has generally an abnormal cell that grows and invade healthy cells in the body. Breast cancer occurs when malignant tumors develop in the breast. Early detection of the breast cancer can effective in increasing the rate of survival. There are several Medical image techniques which has been used for detecting breast cancer. The survey explored the needs for the thermography over other screening tools. Thermography de-tects and records temperature changes on the surface of the skin which is known as Digital Infrared Thermal Imaging (DITI). Thermography is known for its features like non-invasive, painless, cost effective and high chances of recovery, which has got ability to detect the breast cancer at near begin-ning. There is no such tool which provides accurate predictability unless biopsy. But the combination of tools with thermography may boost the sensitivity and specificity when compared with other mechanisms. How to Cite this Article Pubmed Style Pavithra P, Ravichandran K, Sekar K, Manikandan R. The Effect of Thermography on Breast Cancer Detection. SRP. 2018; 9(1): 10-16. doi:10.5530/srp.2018.1.3 Web Style Pavithra P, Ravichandran K, Sekar K, Manikandan R. The Effect of Thermography on Breast Cancer Detection. http://www.sysrevpharm.org/?mno=302644541 [Access: March 28, 2021]. doi:10.5530/srp.2018.1.3 AMA (American Medical Association) Style Pavithra P, Ravichandran K, Sekar K, Manikandan R. The Effect of Thermography on Breast Cancer Detection. SRP. 2018; 9(1): 10-16. doi:10.5530/srp.2018.1.3 Vancouver/ICMJE Style Pavithra P, Ravichandran K, Sekar K, Manikandan R. The Effect of Thermography on Breast Cancer Detection. SRP. (2018), [cited March 28, 2021]; 9(1): 10-16. doi:10.5530/srp.2018.1.3 Harvard Style Pavithra, P., Ravichandran, . K., Sekar, . K. & Manikandan, . R. (2018) The Effect of Thermography on Breast Cancer Detection. SRP, 9 (1), 10-16. doi:10.5530/srp.2018.1.3 Turabian Style Pavithra, PR, KS Ravichandran, KR Sekar, and R Manikandan. 2018. The Effect of Thermography on Breast Cancer Detection. Systematic Reviews in Pharmacy, 9 (1), 10-16. doi:10.5530/srp.2018.1.3 Chicago Style Pavithra, PR, KS Ravichandran, KR Sekar, and R Manikandan. "The Effect of Thermography on Breast Cancer Detection." Systematic Reviews in Pharmacy 9 (2018), 10-16. doi:10.5530/srp.2018.1.3 MLA (The Modern Language Association) Style Pavithra, PR, KS Ravichandran, KR Sekar, and R Manikandan. "The Effect of Thermography on Breast Cancer Detection." Systematic Reviews in Pharmacy 9.1 (2018), 10-16. Print. doi:10.5530/srp.2018.1.3 APA (American Psychological Association) Style Pavithra, P., Ravichandran, . K., Sekar, . K. & Manikandan, . R. (2018) The Effect of Thermography on Breast Cancer Detection. Systematic Reviews in Pharmacy, 9 (1), 10-16. doi:10.5530/srp.2018.1.3
- Published
- 2018
15. Identification of Breast Cancer Using The Decision Tree Algorithm
- Author
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P. Sathiyanarayanan, S Pavithra., M Sai Saranya., and M Makeswari.
- Subjects
Computer science ,business.industry ,Decision tree learning ,Supervised learning ,Decision tree ,Cancer ,Pattern recognition ,medicine.disease ,Support vector machine ,Tree (data structure) ,Statistical classification ,Breast cancer ,medicine ,Artificial intelligence ,skin and connective tissue diseases ,business - Abstract
Identification of breast cancer plays a major role in medical field nowadays. Women are facing different types of cancer and one among them is breast cancer which has severe impact. Breast cancer is of two types i.e. Malign or Benign type. Benign is given as a non-curable type of cancer and Malign is given as curable type of cancer. Breast cancer is symbolized by the modification of genes, persistent pain, changes in the measurement, change in shade(redness),skin appearance of breasts. In the early days of identifying breast cancer is done by using different algorithms namely Support Vector Machine (SVM) algorithm,K Nearest Neighbor (KNN) algorithm, MLP algorithm, etc., By using these algorithms the accuracy of detecting the cancer is not met the extend. Our idea is to detect the breast cancer using Decision Tree algorithm. The decision tree algorithm comes under the supervised learning technique. Our idea is to detect the breast cancer using Decision Tree algorithm. The tree algorithm comes under the supervised learning technique. The main advantage of this decision tree algorithm is identifying whether the predicted cancer is either malign or benign type by producing an 99% accuracy.
- Published
- 2019
16. Abstract 2012: Recurrent rearrangements of NAALADL2 in prostate, breast, cervical, head and neck and lung squamous cell carcinoma
- Author
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James O. Peabody, Craig G. Rogers, Evelyn Jiagge, Sooryanarayana Varambally, Darshan S. Chandrashekar, Justin Fernando, Sean R Williamson, Pavithra D. Arachchige, Nilesh S. Gupta, Dhananjay Chitale, Shannon Carskadon, James Hu, Tarek A. Bismar, Mani Menon, and Nallasivam Palanisamy
- Subjects
Cancer Research ,business.industry ,Head and neck cancer ,Cancer ,medicine.disease ,Fusion gene ,Prostate cancer ,medicine.anatomical_structure ,Breast cancer ,Oncology ,Prostate ,medicine ,Cancer research ,Adenocarcinoma ,business ,Ovarian cancer - Abstract
Prostate cancer is a heterogeneous disease with unique molecular aberrations present in patient sub-groups. Distinct prostate cancer molecular changes have been shown to associate with specific clinical outcomes, suggesting the potential of molecular markers as diagnostic and prognostic biomarkers for prostate cancer. Recurrent ETS family gene fusions, BRAF and SPINK1 overexpression account for about 50-60% of the prostate cancer cases. Genetic aberrations in the remaining 40-50% of the cases is not known. Our attempt to identify new molecular markers in prostate cancer led to the identification of NAALADL2 gene shown to be associated with aggressive prostate cancer. In this study, we carried out a comprehensive analysis of genomic changes of NAALADL2 in prostate and other solid cancers by analyzing copy number changes and gene expression using TCGA next generation RNA sequencing data. We observed recurrent amplification, rearrangement, deletion, mutations and over-expression of NAALADL2 in prostate cancer cases. Notably, we observed mutually exclusive aberrations in NAALADL2 when compared to other cases with known prostate cancer aberrations including ETS gene fusions, indicating NAALADL2 as a distinct molecular sub-set of prostate cancer. Independent validation by fluorescent in situ hybridization (FISH) analysis using break apart probe for NAALADL2 on 874 prostate cancer revealed recurrent amplification and rearrangements in about 8% (71/874) [PN1] of the cases with higher prevalence in Caucasian American than African American cases. Based on these results, we explored prostate cancer TGCA gene fusion database and identified additional cases with gene fusions involving NAALADL2. We selected one of the gene fusions identified in the TCGA database involving NAALADL2-PIK3CA and conducted in vitro functional characterization studies and showed its oncogenic properties. Gene expression microarray analysis of RWPE1 cells transfected with NAALADL2-PIK3CA showed dysregulation of genes involved in cancer related pathways, further suggesting a role for NAALADL2-PIK3CA in prostate cancer development. Based on these studies, we explored the incidence of NAALADL2 gene fusion in other solid cancers including lung squamous cell cancer (LUSC), ovarian cancer, head and neck cancer, cervical cancer and breast cancer shown to have recurrent gene fusions identified in the TCGA gene fusion database. Notably, recurrent rearrangements and amplification are seen in a large subset (45%) of LUSC patients, but not in lung adenocarcinoma, suggesting that NAALADL2 could be developed as a novel biomarker in LUSC. Further validation studies using FISH in our independent cohort of LUSC and breast cancer patients including 79 patients from Ghana confirmed recurrent rearrangements and amplification in a subset of cases. In conclusion, similar to ERG, BRAF and FGFR genes, we show recurrent gene fusions of NAALADL2 across multiple solid cancer with potential applications as a pan cancer molecular marker for cancer diagnosis and a potential target for drug development. Citation Format: Pavithra D. Arachchige, Shannon Carskadon, James Hu, Justin Fernando, Darshan S. Chandrashekar, Nilesh S. Gupta, Sean R. Williamson, Dhananjay A. Chitale, Craig G. Rogers, James O. Peabody, Mani Menon, Tarek A. Bismar, Evelyn Jiagge, Sooryanarayana Varambally, Nallasivam Palanisamy. Recurrent rearrangements of NAALADL2 in prostate, breast, cervical, head and neck and lung squamous cell carcinoma [abstract]. In: Proceedings of the Annual Meeting of the American Association for Cancer Research 2020; 2020 Apr 27-28 and Jun 22-24. Philadelphia (PA): AACR; Cancer Res 2020;80(16 Suppl):Abstract nr 2012.
- Published
- 2020
17. INCIDENTAL DETECTION OF CARCINOMA IN SITU IN FIBROADENOMA OF BREAST IN A YOUNG WOMAN: A RARE FINDING
- Author
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Brij Mohan Kumar Singh, Pavithra P, and Nikitha Valerina Kairanna
- Subjects
Pathology ,medicine.medical_specialty ,030309 nutrition & dietetics ,Population ,Pharmaceutical Science ,Benign tumor ,03 medical and health sciences ,0404 agricultural biotechnology ,Breast cancer ,medicine ,Carcinoma ,Pharmacology (medical) ,skin and connective tissue diseases ,education ,Pharmacology ,0303 health sciences ,education.field_of_study ,business.industry ,Carcinoma in situ ,Breast lumps ,04 agricultural and veterinary sciences ,Ductal carcinoma ,medicine.disease ,040401 food science ,Fibroadenoma ,body regions ,medicine.symptom ,business - Abstract
Fibroadenoma is the most common benign tumor of the breast in young females. Breast cancer arising within a fibroadenoma is a rare phenomenon. The incidence of carcinoma within a fibroadenoma is reported to be between 0.1% and 0.3% in a screened population, with a peak age of occurrence between the 4th and 5th decade. We present a case of 29-year-old female with ductal carcinoma in situ in a background of fibroadenoma. There is a low percentage of fibroadenomas harboring carcinoma; however, all breast lumps should be seriously managed; extirpation and histological examination is recommended.
- Published
- 2019
18. Serum Levels of Metal Ions in Female Patients with Breast Cancer
- Author
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S. Jeevan Amos, D. Siva Mallika, T G Sathisha, S Ragunatha, K Kasturi, and V Pavithra
- Subjects
medicine.medical_specialty ,Oncology clinic ,Clinical Biochemistry ,lcsh:Medicine ,chemistry.chemical_element ,Disease ,magnesium ,Calcium ,Gastroenterology ,Health check ,breast cancer ,iron ,Breast cancer ,Internal medicine ,Female patient ,medicine ,Biochemistry Section ,Stage (cooking) ,skin and connective tissue diseases ,calcium ,business.industry ,zinc ,lcsh:R ,Cancer ,General Medicine ,medicine.disease ,Surgery ,chemistry ,copper ,phosphorous ,business - Abstract
Background: Breast cancer is the second commonest form of cancer among women. Several studies have been conducted to identify potential risk factors. However, role of trace elements or metals in causing breast cancer has not been studied to great extent. Aims: To estimate the serum levels of calcium, copper, magnesium, iron, phosphorus and zinc and determine their role in causing breast cancer in female patients. Settings and Design: A case-control study on female patients with breast cancer was conducted in a private superspecialty hospital and Cancer centre situated in Southern part of India. Materials and Methods: Newly diagnosed female patients with breast cancer in the age group of 30-60 y attending Oncology clinic were included in the study. These cases were selected irrespective of type and stage of the disease. The age matched control subjects were drawn from apparently healthy women attending master health check at superspecialty hospital. The patients or controls suffering from co-morbid conditions which affect serum levels of metal ions and other malignancies, and those undergoing treatment for breast cancer were excluded from the study. Serum was separated and tests were performed according to standard procedure for each metal ion on the same day. The estimation of metal ions was done by UV-Visible Spectrophotometer-CHEM 7. Statistical Analysis: Independent Samples T-test was used to calculate difference between the two means. The p-value of
- Published
- 2015
19. The Effect of Thermography on Breast Cancer Detection.
- Author
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Pavithra, P. R., Ravichandran, K. S., Sekar, K. R., and Manikandan, R.
- Subjects
- *
BREAST cancer , *THERMOGRAPHY , *INFRARED imaging , *IMAGE processing , *EARLY detection of cancer - Abstract
Image processing technique in general, involves the application of signal processing on the input image for isolating the individual color plane of an image. Cancer has generally an abnormal cell that grows and invade healthy cells in the body. Breast cancer occurs when malignant tumors develop in the breast. Early detection of the breast cancer can effective in increasing the rate of survival. There are several Medical image techniques which has been used for detecting breast cancer. The survey explored the needs for the thermography over other screening tools. Thermography detects and records temperature changes on the surface of the skin which is known as Digital Infrared Thermal Imaging (DITI). Thermography is known for its features like non-invasive, painless, cost effective and high chances of recovery, which has got ability to detect the breast cancer at near beginning. There is no such tool which provides accurate predictability unless biopsy. But the combination of tools with thermography may boost the sensitivity and specificity when compared with other mechanisms. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
20. Mesenchymal Lesion in an Adolescent Girl-A Rare Case Report.
- Author
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MANIBARATHI, R., NARMADHA, R., NATARAJ, A. P. RAJESH, PAVITHRA, J., and JAYANTHI, BHARATHI VIDHYA
- Subjects
BREAST cancer ,BREAST surgery ,HISTOPATHOLOGY ,ANGIOSARCOMA ,TUMORS - Abstract
Rhabdomyosarcoma (RMS) comprises 3% of all childhood malignancy. Commonly it involves head and neck, extremity and genitourinary systems. Pure primary RMS of breast is a rare malignacy. Here, we present a case of adolescent girl presented with breast lump which was initially treated as benign lesion with excision. Again she presented with recurrent mass which was operated and microscopically showed features of small blue round cell tumour which has lead to many diagnostic confusions both clinically and histopathologically. Immunohistochemistry with strong nuclear myogenin positivity in >50% of tumour cells confirms the diagnosis of primary mammary RMS. Postoperative period was uneventful. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
21. Breast cancer statistics and markers.
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Donepudi, Mallika Siva, Kondapalli, Kasturi, Amos, Seelam Jeevan, and Venkanteshan, Pavithra
- Subjects
BREAST cancer statistics ,TUMOR markers ,DISEASES in women ,CANCER-related mortality - Abstract
Breast cancer is one of the familiar diseases in women. Incidence and mortality due to cancer, particularly breast cancer has been increasing for last 50 years, even though there is a lacuna in the diagnosis of breast cancer at early stages. According to World Health Organization (WHO) 2012 reports, breast cancer is the leading cause of death in women, accounting 23% of all cancer deaths. In Asia, one in every three women faces the risk of breast cancer in their lifetime as per reports of WHO 2012. Here, the review is been focused on different breast cancer markers, that is, tissue markers (hormone receptors, human epidermal growth factor-2, urokinase plasminogen activator, plasminogen activator inhibitor, p53 and cathepsin D), genetic markers (BRAC1 and 2 and gene expression microarray technique, etc.), and serum markers (CA 15.3, BR 27.29, MCA, CA 549, carcinoembryonic antigen, oncoproteins, and cytokeratins) used in present diagnosis, but none of the mentioned markers can diagnose breast cancer at an early stage. There is a disquieting need for the identification of best diagnosing marker, which can be able to diagnose even in early stage of breast carcinogenesis. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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22. Heat-shock protein 70 binds to a novel sequence in 5′ UTR of tumor suppressor SMAR1 and regulates its mRNA stability upon Prostaglandin A2 treatment
- Author
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Pavithra, Lakshminarasimhan, Sreenath, Kadreppa, Singh, Sandeep, and Chattopadhyay, Samit
- Subjects
- *
HEAT shock proteins , *TUMOR suppressor proteins , *MESSENGER RNA , *BREAST cancer , *TRANSCRIPTION factors , *CARRIER proteins , *CELL cycle , *PROSTAGLANDINS - Abstract
Abstract: Here, we report Prostaglandin A2 (PGA2) induced binding of HSP70 to a novel site on φ1 SMAR1 5′ UTR which stabilizes the wild type transcript and leads to subsequent increase in SMAR1 protein levels. SMAR1 mediated cell cycle arrest is perturbed in PGA2-treated cells when HSP70 is knocked-down. Contrarily HSP70, unlike SMAR1, is overexpressed in breast cancers. We demonstrate that this is because of the inability of HSP70 to bind to the φ17 SMAR1 UTR variant which is the predominant form in breast cancers. [Copyright &y& Elsevier]
- Published
- 2010
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- View/download PDF
23. Tumor suppressor SMAR1 downregulates Cytokeratin 8 expression by displacing p53 from its cognate site
- Author
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Pavithra, Lakshminarasimhan, Singh, Sandeep, Sreenath, Kadreppa, and Chattopadhyay, Samit
- Subjects
- *
TUMOR suppressor proteins , *GENE expression , *TRANSCRIPTION factors , *P53 protein , *CELL migration , *CHROMATIN , *GENETIC transcription - Abstract
Abstract: Intermediary filaments play a crucial role in transformation of cells to a malignant phenotype. Here, we report that tumor suppressor SMAR1 downregulates Cytokeratin 8 gene expression by modulating p53-mediated transactivation of this gene. Moreover, the cell surface cytokeratin expression was downregulated leading to a decreased migration and invasiveness of cells. We further validated these results using genotoxic stress agents that lead to an increase in the levels of SMAR1 protein. This subsequently represses the transcription of Cytokeratin 8 gene by local chromatin condensation mediated by histone methylation and deacetylation. Evaluation of SMAR1 and Cytokeratin 8 proteins in different grades of cancer using tissue microarray point out at the inverse expression profiles of these genes (i.e. low levels of SMAR1 correlating with high expression of Cytokeratin 8) in higher grades of breast cancer. Therefore, the results presented here highlight the mechanism of Cytokeratin 8 gene regulation by interplay of tumor suppressor proteins SMAR1 and p53. [Copyright &y& Elsevier]
- Published
- 2009
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24. Tumor Suppressor SMAR1 Mediates Cyclin D1 Repression by Recruitment of the SIN3/Histone Deacetylase 1 Complex.
- Author
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Rampalli, Shravanti, Pavithra, L., Bhatt, Altaf, Kundu, Tapas K., and Chattopadhyay, Samit
- Subjects
- *
TUMOR suppressor proteins , *CYCLINS , *GROWTH factors , *MATRIX attachment regions , *CARRIER proteins , *NUCLEAR matrix , *BREAST cancer , *CANCER cells , *CYCLIN-dependent kinases , *GENETIC regulation - Abstract
Matrix attachment region binding proteins have been shown to play an important role in gene regulation by altering chromatin in a stage- and tissue-specific manner. Our previous studies report that SMAR1, a matrix-associated protein, regresses B16-F1-induced tumors in mice. Here we show SMARI targets the cyclin D1 promoter, a gene product whose dysregulation is attributed to breast malignancies. Our studies reveal that SMAR1 represses cyclin D1 gene expression, which can be reversed by small interfering RNA specific to SMAR1. We demonstrate that SMAR1 interacts with histone deacetylation complex 1, SIN3, and pocket retinoblastomas to form a multiprotein repressor complex. This interaction is mediated by the SMAR1(160–350) domain. Our data suggest SMAR1 recruits a repressor complex to the cyclin D1 promoter that results in deacetylation of chromatin at that locus, which spreads to a distance of at least the 5 kb studied upstream of the cyclin D1 promoter. Interestingly, we find that the high induction of cyclin D1 in breast cancer cell lines can be correlated to the decreased levels of SMAR1 in these lines. Our results establish the molecular mechanism exhibited by SMAR1 to regulate cyclin D1 by modification of chromatin. [ABSTRACT FROM AUTHOR]
- Published
- 2005
- Full Text
- View/download PDF
25. Heat-shock protein 70 binds to a novel sequence in 5′ UTR of tumor suppressor SMAR1 and regulates its mRNA stability upon Prostaglandin A2 treatment
- Author
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Kadreppa Sreenath, Sandeep Singh, Samit Chattopadhyay, and Lakshminarasimhan Pavithra
- Subjects
Untranslated region ,Cell cycle checkpoint ,Five prime untranslated region ,Macromolecular Substances ,RNA Stability ,Biophysics ,Prostaglandin ,Breast Neoplasms ,Cell Cycle Proteins ,Biology ,Biochemistry ,Models, Biological ,law.invention ,chemistry.chemical_compound ,Breast cancer ,Structural Biology ,law ,Genetics ,Tumor Cells, Cultured ,Humans ,HSP70 Heat-Shock Proteins ,RNA, Messenger ,mRNA stability ,Molecular Biology ,HSP70 ,Messenger RNA ,Prostaglandins A ,Base Sequence ,Tumor Suppressor Proteins ,PGA2 ,Wild type ,Nuclear Proteins ,Cell Biology ,Molecular biology ,Hsp70 ,DNA-Binding Proteins ,Nucleoproteins ,chemistry ,Gene Expression Regulation ,Suppressor ,Nucleic Acid Conformation ,5' Untranslated Regions ,SMAR1 ,Protein Binding - Abstract
Here, we report Prostaglandin A2 (PGA2) induced binding of HSP70 to a novel site on φ1 SMAR1 5′ UTR which stabilizes the wild type transcript and leads to subsequent increase in SMAR1 protein levels. SMAR1 mediated cell cycle arrest is perturbed in PGA2-treated cells when HSP70 is knocked-down. Contrarily HSP70, unlike SMAR1, is overexpressed in breast cancers. We demonstrate that this is because of the inability of HSP70 to bind to the φ17 SMAR1 UTR variant which is the predominant form in breast cancers.
- Full Text
- View/download PDF
26. Estrogen induced concentration dependent differential gene expression in human breast cancer (MCF7) cells: Role of transcription factors.
- Author
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Chandrasekharan, Sabarinath, Kandasamy, Krishna Kumar, Dayalan, Pavithra, and Ramamurthy, Viraragavan
- Subjects
- *
PHYSIOLOGICAL effects of estrogen , *GENE expression , *BREAST cancer , *CANCER cells , *TRANSCRIPTION factors , *ESTRADIOL , *CELL proliferation - Abstract
Highlights: [•] Estradiol (E2) at low dose induced cell proliferation in breast cancer cells. [•] E2 at high concentration induced cell stress in breast cancer cells. [•] Estrogen receptor physically interacts only with a few transcription factors. [•] Differential expression of genes with Oct-1 binding sites increased under stress. [•] Transcription factor binding sites showed distinct spatial distribution on genes. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
27. Current trends and opportunities in targeting p21 activated kinase-1(PAK1) for therapeutic management of breast cancers.
- Author
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Kanumuri, Rahul, Saravanan, Roshni, Pavithra, V., Sundaram, Sandhya, Rayala, Suresh K., and Venkatraman, Ganesh
- Subjects
- *
BREAST cancer , *BREAST cancer research , *WNT signal transduction , *CELL motility , *ONCOGENES , *MITOSIS - Abstract
• Breast cancer is a multifaceted disease, which is mainly caused due to deregulations in multiple signalling cascades. • A proteogenomic study on breast (normal/cancer) tissues showed that PAK1 is an outlier kinase which is frequently overexpressed in cancer tissues. • P21 activated kinase (PAK1) is an oncogene which is involved in breast cancer progression by phosphorylation of it's substrates and it is also involved in tamoxifen resistance. • Kinase Interacting Substrate Screening (KISS) methodology can be used to screen subtype specific substrates of PAK1 for identification of druggable targets and biomarkers. Breast cancer is the most frequently diagnosed cancer in women worldwide. Identifying reliable biomarkers and druggable molecular targets pose to be a significant quest in breast cancer research. p21-activated kinase 1 (PAK1) is a serine/threonine kinase that direct cell motility, cytoskeletal remodelling, and has been shown to function as a downstream regulator for various cancer signalling cascades that promote cell proliferation, apoptosis deregulation and hasten mitotic abnormalities, resulting in tumor formation and progression. The heterogeneity and acquired drug resistance are important factors that challenge the treatment of breast cancer. p21-activated kinase 1 signalling is crucial for activation of the Ras/RAF/MEK/ERK, PI3K/Akt/mTOR and Wnt signalling cascades which regulate cell survival, cell cycle progression, differentiation, and proliferation. A study involving proteogenomics analysis on breast cancer tissues showed the PAK1 as outlier kinase. In addition to this, few outlier molecules were identified specific to subtypes of breast cancer. A few substrates of PAK1 in breast cancer are already known. In this paper, we have discussed a similar approach called Kinase Interacting Substrate Screening (KISS) for the identification of novel oncogenic substrates of p21-activated kinase specific to subtypes of breast cancer. Such high throughput approaches are expected to accelerate the process of identifying novel drug targets and biomarkers. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
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