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Cancer cells can be proliferating in a few months and years. It depends on cancer stage. Chemotherapy, immunotherapy and anti-metabolic drugs have been used in order to kill cancer cells and prevent immune system weakly and metastasis. However, such drugs can damage healthy cells too. Natural ways to cancer treatments may help whole body to cancer cells. In this work, it was taking off cancer nodule to skin cancer by surgery and we treat the nodule as wound, using Nanoskin® advance cell therapy (ACT), natural extra cellular matrix which releases nutrients to the skin cancer. Our result shows that the cancer nodule disappears in few weeks in skin, because of natural membrane treatment. In addition, we obtained complete wound healing due anticancer nutrients (beta-glucan) delivery to skin.

3D printing is the future. It will change the way in which we produce new materials—maybe much less in factories and much easier in shops. However, biobased materials have been difficult to 3D print. Most 3D printers use heat to melt the plastic or metal to be printed, and biobased materials are degraded. But cellulose nanofibrils have a solution to this problem: the printing paste is wet and dries out to a solid material. In this work, it was showed recent wound healing in Vinous Ulcer with kidney and other health complications using bacterial cellulose 3D print membranes.

Made available in DSpace on 2022-05-01T09:47:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-02-01 We evaluated the feasibility of Nanoskin®, a bacterial cellulose (BC) nanofiber membrane, as a potential scaffold for cell transference therapy. Nanoskin® does not induce lymphocyte proliferation, but it does not kill lymphocytes. Human mesenchymal stem cells (MSCs) and lymphocytes produced significantly elevated amounts of interleukin (IL)-10 (p = 0.0005; p = 0.02) when in contact with Nanoskin®. In conclusion, the Nanoskin® can be a promising biomaterial for use as a cell carrier-scaffold in cell transference therapies. State University of Sao Paulo– UNESP Innovatecs Biotechnological Research and Development School of Medical Sciences University of New South Wales State University of Sao Paulo– UNESP

This experimental study evaluated 40 guinea pigs that received Nanoskin®. A full thickness skin rectangle measuring 2x4 cm was removed from the median dorsal region and the wound was covered by a 2X2 cm fragment of uncoated Nanoskin® graft (uncoated group) or Nanoskin® coated with gelatin (coated group) and sutured in the caudal region and a 2x2 cm fragment of autologous skin sutured in the cranial aspect of the surgical wound served a control. The animals were examined daily by ectoscopy and euthanized at 7, 30, 90 and 180 days postoperatively. Immediately after euthanasia, the operated area was shaved, documented with photos and removed, and prepared for morphological, morphometric and ultrastructural exam. It was found that the full thickness skin wound healed in a centripetal pattern. The healing process was similar between groups, with a more pronounced inflammatory reaction initially that gradually decreased over time. The conclusion is that the uncoated Nanoskin® or Nanoskin® coated with gelatin is a good material to treat full thickness skin wound. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res B Part B: Appl Biomater, 2018. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 724-732, 2019.

Bacterial cellulose (BC) is established as a newest biomaterial, and it can be used for medical and odontology applications. In addition, it has called attention for uses such as membrane for wound care and tissue engineering. In this work, the bacterial cellulose fermentation process is modified by the addition of natural materials before the bacteria are inoculated. In vivo behavior using natural ECM for regenerative medicine is presented and completed wound healing process is 3 months.

Made available in DSpace on 2018-12-11T17:10:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-06-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Bacterial cellulose has become established as a new biomaterial, and it can be used for medical applications. In addition, it has called attention due to the increasing interest in tissue engineering materials for wound care. In this work, the bacterial cellulose fermentation process was modified by the addition of chondroitin sulfate to the culture medium before the inoculation of the bacteria. The biomimetic process with heterogeneous calcium phosphate precipitation of biological interest was studied for the guided regeneration purposes on bacterial cellulose. FTIR results showed the incorporation of the chondroitin sulfate in the bacterial cellulose, SEM images confirmed the deposition of the calcium phosphate on the bacterial cellulose surface, XPS analysis showed a selective chemical group influences which change calcium phosphate deposition, besides, the calcium phosphate phase with different Ca/P ratios on bacterial cellulose surface influences wettability. XTT results concluded that these materials did not affect significantly in the cell viability, being non-cytotoxic. Thus, it was produced one biomaterial with the surface charge changes for calcium phosphate deposition, besides different wettability which builds new membranes for Guided Tissue Regeneration. São Paulo State University (Unesp) Department of Physical Chemistry Institute of Chemistry Innovatec's-Biotechnology Research and Development São Carlos School of Engineering Materials Engineering Department USP Univ Fed ABC UFABC CCNH São Paulo State University Department of Diagnosis and Surgery Araraquara Dental School São Paulo State University School of Dentistry Morphology Department UNESP São Paulo State University (Unesp) Department of Physical Chemistry Institute of Chemistry São Paulo State University Department of Diagnosis and Surgery Araraquara Dental School São Paulo State University School of Dentistry Morphology Department UNESP

Natural extracellular matrices (ECMs) perform the tasks necessary for tissue formation, maintenance, regulation and function, providing a powerful means of controlling the biological performance of regenerative materials. In addition, biomedical materials have claimed attention because of the increased interest in tissue engineering materials for wound care and regenerative medicine. Moreover, the nanostructure and morphological similarities with collagen make BC attractive for cell immobilization, cell support and Natural Extracellular Matrix (ECM) Scaffolds. In this work, we present the extracellular matrix (ECM) using the bacterial cellulose (Nanoskin®) which regulates cell behavior by influencing cell proliferation, survival, shape, migration and differentiation. Bacterial cellulose fermentation process is modified before the bacteria are inoculated for mimicking ECM to cells support and built new local material for wound healing. Chemical groups influences and thermal behavior in bacterial cellulose were analyzed using transmission infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), respectively. Besides, In vivo analysis was evaluated with clinical study at Sharjah Kuwait Hospital.

Introduction: Bacterial cellulose (BC) can be used in wide area of applied scientific, especially for tissue regeneration and regenerative medicine, lately, bacterial cellulose mats are used in the treatment of skin conditions such as burns and ulcers, because of the morphology of fibrous biopolymers serving as a support for cell proliferation, its pores allow gas exchange between the organism and the environment.

Natural extracellular matrices (ECMs) perform the tasks necessary for tissue formation, maintenance, regulation and function, providing a powerful means of controlling the biological performance of regenerative materials. The extracellular matrix represents Mother Nature's biologic scaffold. The ECM is rich in structural and functional proteins that not only maintain the health of differentiated tissues, but support the host response to tissue injury. In this work, we present the extracellular matrix (ECM) using the bacterial cellulose (Nanoskin®) which regulates cell behavior by influencing cell proliferation, survival, shape, migration and differentiation. Bacterial cellulose fermentation process is modified by the addition of vegetal stem cell to the culture medium and natural materials (hyaluronic acid and chondroitin sulfate) before the bacteria are inoculated for mimicking ECM to cells support and built new skin formation.

Bacterial cellulose (BC) can be used in wide area of applied scientific, especially for tissue regeneration and regenerative medicine, lately, bacterial cellulose mats are used in the treatment of skin conditions such as burns and ulcers, because of the morphology of fibrous biopolymers serving as a support for cell proliferation, its pores allow gas exchange between the organism and the environment. Moreover, the nanostructure and morphological similarities with collagen make BC attractive for cell immobilization, cell support and Natural Extracellular Matrix (ECM) Scaffolds. In this scope, Natural ECM is the ideal biological scaffold since it contains all the components of the tissue. The development of mimicking biomaterials and hybrid biomaterial can further advance directed cellular differentiation without specific induction. The extracellular matrix (ECM) contains several signals that are received by cell surface receptors and contribute to cell adhesion and cell fate which control cellular activities such as proliferation, migration and differentiation. As such, regenerative medicine studies often rely on mimicking the natural ECM to promote the formation of new tissue by host cells, and characterization of natural ECM components is vital for the development of new biomimetic approaches. In this work, the bacterial cellulose fermentation process is modified by the addition of vegetal stem cell to the culture medium and natural materials before the bacteria are inoculated. In vivo behavior using natural ECM for regenerative medicine is presented.

Bacterial cellulose (BC) has become established as a remarkably versatile biomaterial and can be used in a wide variety of applied scientific applications, especially for medical devices. In this work, the bacterial cellulose fermentation process is modified by the addition of hyaluronic acid and gelatin (1% w/w) to the culture medium before the bacteria is inoculated. Hyaluronic acid and gelatin influence in bacterial cellulose was analyzed using Transmission Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). Adhesion and viability studies with human dental pulp stem cells using natural bacterial cellulose/hyaluronic acid as scaffolds for regenerative medicine are presented for the first time in this work. MTT viability assays show higher cell adhesion in bacterial cellulose/gelatin and bacterial cellulose/ hyaluronic acid scaffolds over time with differences due to fiber agglomeration in bacterial cellulose/gelatin. Confocal microscopy images showed that the cell were adhered and well distributed within the fibers in both types of scaffolds.

Bacterial cellulose is a highly hydrated pellicle made up of a random assembly of ribbon shaped fibers less than 5 nm wide. The unique properties provided by the nanometric structure have led to a number of diagnostic biological probes, display devices due to their unique size-dependent medical applications. Bacterial cellulose matrix extracellular is a novel biotechnology and unique medicine indicated for ultimate chronic wound treatment management, drug delivery, tissue engineering, skin cancer and offers an actual and effective solution to a serious medical and social problem and to promote rapid healing in lesions caused by Diabetic burns, ulcers of the lower limbs or any other circumstance in which there's epidermal or dermal loss. In this work, it is reported novel antimicrobial peptides (AMPs) bacterial cellulose/polyhexanide biguanide (PHMB) which are produced by symbioses culture between polyhexanide biguanide and green tea culture medium resulting in the pure 3-D structure consisting of an ultra-fine network of novel biocellulose/PHMB nanofibres matrix (2-8 nm), highly hydrated (99% in weight), and with higher molecular weight, full biocompatibility.

Adhesion and Viability study with human dental pulp stem cell using natural nanotolith/bacterial cellulose scaffolds for regenerative medicine are presented at first time in this work. Nanotolith, are osteoinductors, i.e., they stimulate bone regeneration, enabling higher cells migration for bone tissue regeneration formation. This is mainly because nanotoliths are rich minerals present in the internal ear of bony fish. In addition, are part of a system which acts as a depth sensor and balance, acting as a sound vibrations detector and considered essential for the bone mineralization process, as in hydroxiapatites. Nanotoliths influence in bacterial cellulose was analyzed using transmission infrared spectroscopy (FTIR). Results shows that fermentation process and nanotoliths agglomeration decrease initial human dental pulp stem cell adhesion however tested bionanocomposite behavior has cell viability increase over time.

Department of Nanoscience and Advanced Materials UFABC, Santo Andre, SP, Zip Code: 09210-170

Objetivo: Avaliar a biocompatibilidade da Nanoskin para reposicao de volume em cavidades enucleadas ou evisceradas de coelhos. Metodos: Estudo experimental, utilizando implantes de Nanoskin (Innovatecs®, Sao Carlos, Brasil), celulose bacteriana produzida pela bacteria Acetobacter xylinum tendo como substrato o cha-verde. Implantes de 10mm de diâmetro/5mm de espessura foram colocados em cavidades enucleadas (G1) ou evisceradas (G2) de 21 coelhos, avaliados clinicamente todos os dias, sacrificados aos 7, 30 e 90 dias apos a cirurgia. O material foi removido e preparado para exame de microscopia optica. Resultados: Sinais flogisticos discretos no posoperatorio imediato, nao tendo sido evidenciados sinais infecciosos ou extrusao de nenhum implante. Houve aparente reducao do volume ao longo do periodo experimental. Histologicamente ambos os grupos foram muito semelhantes, apresentando aos 7 dias celulas inflamatorias (predominantemente monocitos e neutrofilos), rede de fibrina e hemacias. A Nanoskin apresentava-se como pequenas esferas, de cor rosea, com pequenos espacos entre elas, permeados por escassas celulas inflamatorias. As celulas inflamatorias se modificaram ao longo de periodo experimental, sendo possivel observar aos 30 dias celulas gigantes multinucleadas e fibroblastos maduros permeando o implante. Aos 90 dias, a estrutura do implante apresentava-se desorganizada, amorfa, com restos necroticos e com areas ovoides, revestidas por fina membrana rosea, que pareciam se agrupar, vazias ou preenchidas por material acelular, roseo ou acinzentado. Conclusao: A Nanoskin provocou reacao inflamatoria que levou a reabsorcao e reducao do volume do implante. Novas formulacoes devem ser estudadas a fim de ter um produto que seja permanente para reparo da cavidade anoftalmica.

Bacterial cellulose (BC) has become established as a new biomaterial and can be used in several applied scientific areas, especially for medical devices. In addition, biomedical materials have claimed attention because of the increased interest in tissue engineering materials for wound care and regenerative medicine. The BC bioprocess production can be changed by controlling the fermentation process. It has unique properties that make it an exciting candidate as a medical material: strength, good integration within the host tissue, and flexibility of production in various shapes and sizes. This chapter describes a morphological investigation in human regenerative medicine, stem cell behavior on bacterial cellulose, and recent drug delivery applications for medical applications. It also discusses futures insights and research with bacterial cellulose.

Bacterial cellulose (BC) has established to be a remarkably versatile biomaterial and can be used in wide variety of applied scientific endeavours, especially for medical devices, lately, bacterial cellulose mats are used in the treatment of skin conditions such as burns and ulcers, because of the morphology of fibrous biopolymers serving as a support for cell proliferation, its pores allow gas exchange between the organism and the environment. Moreover, the nanostructure and morphological similarities with collagen make BC attractive for cell immobilization and cell support. In this work, we obtain first electrospun bacterial cellulose mats after chemical treatment and without conductive additives. With DMA/LiClmechanism dissolution, modified bacterial cellulose was easily electrospun in chloroform/acetone solvents in comparison with BC unmodified. FTIR peaks results are consistent with proposed interactions between cellulose and DMA/LiCl solvent system.

Nanocellulose is the crystalline domains obtained from renewable cellulosic sources, used to increase mechanical properties and biodegrability in polymer composites. This work has been to study how high pressure defibrillation and chemical purification affect the PALF fibre morphology from micro to nanoscale. Microscopy techniques and X-ray diffraction were used to study the structure and properties of the prepared nanofibers and composites. Microscopy studies showed that the used individualization processes lead to a unique morphology of interconnected web-like structure of PALF fibers. The produced nanofibers were bundles of cellulose fibers of widths ranging between 5 and 15 nm and estimated lengths of several micrometers. Percentage yield and aspect ratio of the nanofiber obtained by this technique is found to be very high in comparison with other conventional methods. The nanocomposites were prepared by means of compression moulding, by stacking the nanocellulose fibre mats between polyurethane films. The results showed that the nanofibrils reinforced the polyurethane efficiently. The addition of 5 wt% of cellulose nanofibrils to PU increased the strength nearly 300% and the stiffness by 2600%. The developed composites were utilized to fabricate various versatile medical implants.

In the present work, we report the first bionanocomposite material formed by otoliths/ collagen/ bacterial cellulose (BC) networks (OCBC). This biomaterial is an osteoinductor or be, stimulates the bone regeneration, enabling bigger migration of the cells for formation of the bone tissue regeneration mainly because nanotolith are rich in minerals considered essential to the bone mineralization process on a protein matrix (otolin). The objective in this study was to analyze the regeneration capacity of bone defects treated with this bionanocomposite. Histological experiments shows bone tissue formation with high regularity, higher osteoblast activity and osteo-reabsorption activities areas. The results suggest the potential for this new biomaterial as a scaffold for bone tissue regeneration.

Nanotholits is an osteoinductor or be, stimulates the bone regeneration, enabling bigger migration of the cells for formation of the bone tissue regeneration mainly because nanotholits are rich in minerals considered essential to the bone mineralization process on a protein matrix (otolin) as hydroxiapatite. In order to improve its biodegrability and bioresorption in new platforms for tissue engineering, it was electrospun PHB/nanotholits from aqueous solutions of this polymer at concentrations of nanotholits 1% (w/v) and compared morphological and thermal properties with PHB/nanotholits casting films. Electrospun PHB/nanotholits mats presents more symmetric nanopore structure than casting films mats observed by SEM images mainly because the orientation of pores along the longitudinal direction of the electrospun fibers. Nanotholits influences in PHB electrospun/casting was analyzed using transmission infrared spectroscopy (FTIR). TGA showed similar thermal properties but DSC showed distinct thermal properties and crystallinity process of the developed bionanocomposite mainly because of different processing.

Bacterial cellulose (BC) has established to be a remarkably versatile biomaterial and can be used in wide variety of applied scientific endeavours, especially for medical devices. In fact, biomedical devices recently have gained a significant amount of attention because of an increased interest in tissue-engineered products for both wound care and the regeneration of damaged or diseased organs. Due to its unique nanostructure and properties, microbial cellulose is a natural candidate for numerous medical and tissue-engineered applications. Hydrophilic bacterial cellulose fibers of an average diameter of 50 nm are produced by the bacterium Acetobacter xylinum, using a fermentation process. The microbial cellulose fiber has a high degree of crystallinity. Using direct nanomechanical measurement, determined that these fibers are very strong and when used in combination with other biocompatible materials, produce nanocomposites particularly suitable for use in human and veterinary medicine. Moreover, the nanostructure and morphological similarities with collagen make BC attractive for cell immobilization and cell support. The architecture of BC materials can be engineered over length scales ranging from nano to macro by controlling the biofabrication process. The chapter describes the fundamentals, purification and morphological investigation of bacterial cellulose. This chapter deals with the modification of microbial cellulose and how to increase the compatibility between cellulosic surfaces and a variety of plastic materials. Furthermore, provides deep knowledge of fascinating current and future applications of bacterial cellulose and their nanocomposites especially in the medical field, materials with properties closely mimic that of biological organs and tissues were described.

Several studies published in the last decade have pointed to the use of enzymes and microorganisms in biocatalytic reactions to generate electricity. Enzymes and living organisms can be used in modified electrodes to build the so-called biofuel cells (BFCs). However, a deep understanding of the structure and biocatalytic properties after enzyme immobilization is still lacking because they are immobilized in the solid state and outside of their natural environment. Thus, based on biological molecules and nanostructure materials applied to BFCs, these current topics shall be reviewed here, and prospects for future development in these areas will be presented as well. Moreover, immobilization methodologies and enzyme stability systems that result in BFCs will also be presented. Finally, BFC power density and catalyst support will be widely discussed in this book chapter.

Nature-inspired routes involving the creation of natural origin polymer-based systems constitute an alternative route to produce novel natural nanocomposites. Composition in these systems can be designed to mimic the tissue environment required for cellular regeneration of soft and hard tissues. Factors such as design, choice, compatibility of the polymers, their degradability, low cost and intrinsic cellular interaction makes them very attractive candidates for regenerative medicine. The present chapter overviews the potential applications of natural origin polymer-based systems, especially those investigated from protein-based polymer systems, and proposed for the treatment of soft and hard tissues. Emphasis is made on the structural modifications, properties and compatibility of the natural materials and their nanocomposites for regenerative medicine.

Composites with antimicrobial activity are of great interest nowadays and the development of titanium dioxide with these functional properties presents interest in academic and industrial sectors. An approach to develop PE composite containing silver microparticles to have an antimicrobial effect is presented. To obtain such antimicrobial composites, LDPE/EVA were processed with Ag particles on TiO2 particles as inorganic carrier substance. Titanium dioxide nanoparticles (P-25) were covered with silver particles using Turkevich Method or citrate reduction method. The Ag/TiO2 particles were dispersed at concentration of 0,8 wt% and 1% wt% in LDPE/ethylene vinyl acetate copolymer (EVA)–(50% w/w) at the melt state in a Haake torque Rheometer. Silver microparticles were characterized with UV-Vis Spectroscopy. The composites thus prepared were characterized through XRD, Ares Rheometer, Scanning Electronic Microscopy (SEM) and JIS Z 2801 antimicrobial tests to study the effects of the addition of particles on r...

A new approach is described to produce an efficient electrode material for biofuel cells using flexible carbon cloth (FCC) and hollow core-mesoporous shell carbon (HCMSC) nanospheres as bio-anode materials. The bio-electrochemical activity of glucose oxidase (GOx) enzyme adsorbed on this bio-anode was evaluated, with the maximum anodic current density varying from 80 microA cm(-2) to 180 microA cm-2 for glucose concentrations up to 5.0 mmol L(-1) for the FCC modified electrode with HCMSCs. The open circuit cell voltage was E(0) = 380 mV, and the catalytic electro-oxidation current of glucose reached 0.1 mA cm(-2) at 0.0 V versus Ag/AgCl. This new system employing HCMSC-based FCC is promising toward novel bio-anodes for biofuel cells using glucose as a fuel.