Thesis (Ph. D.)--Case Western Reserve University, 2005. / [School of Medicine] The Molecular Virology Training Program. Includes bibliographical references. Available online via OhioLINK's ETD Center.

Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 195-227). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph. D.)--University of Texas at Austin, 2004. / Supervisor: Susan M. Fischer. Vita. Includes bibliographical references.

Orientadores: Ana Terezinha Guillaumon, Maria Beatriz Puzzi / Tese (doutorado) - Universidade Estadual de Campinas. Faculdade de Ciências Médicas / Made available in DSpace on 2018-08-16T04:02:11Z (GMT). No. of bitstreams: 1 Bosnardo_CarlaAparecidaFaccio_D.pdf: 1290843 bytes, checksum: bad65c993cc70377c548424ff8f543bc (MD5) Previous issue date: 2010 / Resumo: Introdução: A úlcera venosa é uma complicação da insuficiência venosa crônica, atinge indivíduos adultos, afastando-os do trabalho e do convívio social normal. Objetivo: Demonstrar uma nova terapêutica para o tratamento das úlceras venosas através do enxerto de queratinócitos autólogos. Casuística e Método: Foram selecionados, de forma aleatória no ambulatório de Moléstias Vasculares Periféricas da Faculdade de Ciências Médicas da UNICAMP - Vinte e Cinco ( 25) doentes com úlcera de venosa, CEAP 6 , que não obtiveram cicatrização, das mesmas, com tratamentos convencionais; divididos em dois grupos, Grupo I- 11 doentes, 10 mulheres e 1 homem; Grupo II- 14 doentes, 11 mulheres e 3 homens. Ambos os grupos foram submetidos à aplicação do autoenxerto de queratinócitos sobre o leito limpo da úlcera; e ao grupo II, foi também ministrada dose de diosmina hesperidina micronizada a cada 12 horas. A todos os doentes, foi solicitado um repouso de 30 minutos em Trendelemburg para duas horas de atividade habitual. Os queratinócitos foram cultivados no Laboratório de Cultura de Células da Pele, CIPED- FCM - UNICAMP. Resultados: Após a aplicação de testes estatísticos não paramétricos, devido ao tipo da amostra, foi observada cicatrização e/ou melhora das úlceras com redução do leito nos dois grupos, sendo que o Grupo II obteve resultados mais precoces. Conclusão . Esse método mostra ser uma boa opção terapêutica no auxílio à cicatrização das úlceras venosas / Abstract: The venous stasis ulcer is the most severe complication of venous insufficiency, affecting adults and keeping them away from work and from normal social life. Objective: To demonstrate a new therapeutic method for accelerating healing. Methods: Twenty-five (25) patients with venous stasis ulcers, CEAP VI, who have not healed with conventional treatments were selected from the Clinic of Peripheral Vascular Diseases, Faculty of Medical Sciences, UNICAMP - were treated with autograft keratinocytes, grown in the skub cell culture laboratory, CIPED-FCM - UNICAMP. They were divided into two groups, Group I-11 patients, 10 female and male, Group II-14 patients, 11 female and 3 male. Both groups were treated with autograft keratinocytes on the clean ulcer bed, and group II, was also given a dose of micronized diosmin hesperidin every 12 hours. All the patients were asked to take a 30-minute rest in the Trendelenburg position for two hours of usual activity. Results: After the evaluation of data with statistics methods no parametric Healing and/or improvement of the ulcers with significant reduction of the bed in both groups were observed, with Group II obtaining precocious results. Conclusion? This method proves to be a good therapeutic option to help in the healing of stasis ulcers / Doutorado / Cirurgia / Doutor em Cirurgia

A huge discrepancy between the number of patients on the waiting list for organ transplants and the actual available donors has led to search for alternative approaches to substitute compromised or missing tissues and organs. Tissue engineering is a promising alternative to organ transplantation with the aim to fabricate functional organs through the use of biological or biocompatible scaffolds. Nanogels made from self-assembling ultrashort peptides are promising biomaterials for a variety of biomedical applications. Our group at KAUST is interested in the development of novel synthetic peptide-based biomaterials that combine the advantages of both natural and synthetic hydrogels for various applications. In this study, we have investigated two compounds of a novel class of rationally designed ultrashort peptides, Ac-IVFK-NH2 (Ac-Ile-Val-Phe-Lys-NH2) and Ac-IVZK-NH2 (Ac-Ile-Val-Cha-Lys-NH2). These compounds have an innate tendency to self-assemble into nanofibrous hydrogels which can be used as 3D scaffolds, for example for the fabrication of 3D skin grafts for wound healing. We have evaluated the efficacy of the peptide scaffolds in treating full-thickness wounds in minipigs. Additionally, we assessed the ability of these scaffolds in supporting skeletal muscle tissue proliferation and differentiation. We found that our innovative nanogels supported a substantial increase in human dermal fibroblast and myoblast growth and cells viability, and supported myoblast differentiation. Also, microscopic observation of the direct contact of keratinocytes and fibroblasts revealed enhancement in keratinocytes proliferation. In addition, we demonstrated the ability of human umbilical vein endothelial cells to form tube like structure within peptide nanogels using immunofluorescence staining. Moreover, we successfully produced artificial 3D vascularized skin substitutes using these peptide scaffolds. We selected these peptide nanogels and were able to produce in situ silver nanoparticles within the nanogels, solely through UV irradiation, with no reducing agent present. We then assessed the efficacy of the silver nanoparticle-containing peptide nanogels on minipigs with full-thickness excision wounds. The application of the peptide nanogels on full thickness minipig wounds demonstrated that the scaffolds were biocompatible and did not trigger wound inflammation, and thus safe for topical application. The effect of nanogels, both with and without the addition of the silver nanoparticles, revealed that the scaffold itself has a high potential to act as an antibacterial agent. Interestingly, the effect of the peptide nanogels on wound closure was comparable to that of standard care hydrogels. Furthermore, we have demonstrated that both peptides can act as printable bioinks which opens up the possibility of 3D bioprinting of different cell types in the future. We believe that the described results represent an advancement in the context of engineering skin and skeletal muscle tissue, thereby providing the opportunity to rebuild missing, failing, or damaged parts.

No description available.

No / The epidermal differentiation program is regulated at several levels including signaling pathways, lineage-specific transcription factors, and epigenetic regulators that establish well-coordinated process of terminal differentiation resulting in formation of the epidermal barrier. The epigenetic regulatory machinery operates at several levels including modulation of covalent DNA/histone modifications, as well as through higher-order chromatin remodeling to establish long-range topological interactions between the genes and their enhancer elements. Epigenetic regulators exhibit both activating and repressive effects on chromatin in keratinocytes (KCs): whereas some of them promote terminal differentiation, the others stimulate proliferation of progenitor cells, as well as inhibit premature activation of terminal differentiation-associated genes. Transcription factor-regulated and epigenetic mechanisms are highly connected, and the p63 transcription factor has an important role in the higher-order chromatin remodeling of the KC-specific gene loci via direct control of the genome organizer Satb1 and ATP-dependent chromatin remodeler Brg1. However, additional efforts are required to fully understand the complexity of interactions between distinct transcription factors and epigenetic regulators in the control of KC differentiation. Further understanding of these interactions and their alterations in different pathological skin conditions will help to progress toward the development of novel approaches for the treatment of skin disorders by targeting epigenetic regulators and modulating chromatin organization in KCs. / National Alopecia Areata Foundation; (R13AR067088-01) from the National Institute of Arthritis and Musculoskeletal and Skin Diseases; and the National Center for Advancing Translational Sciences

Yes / Nottingham Trent University, United Kingdom, UoA03 QR and Capital Funds (MIA), as well as by the grant from Amway, USA to VAB and NVB.

No description available.

Diss. (sammanfattning) Uppsala : Univ., 2002. / Härtill 4 uppsatser.