Navegando por Assunto "Tecido adiposo"

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Acesso aberto (Open Access)
Isolamento, caracterização e análise da multipotência de células-tronco adultas derivadas do tecido adiposo de bovinos e bubalinos
(Universidade Federal do Pará, 2011-02-01) SAMPAIO, Rafael Vilar; OHASHI, Otávio Mitio; http://lattes.cnpq.br/5547874183666459
Adult stem cells are known for their potential and plasticity to differentiate into several different cell types (multipotency), which has implications for cell therapy as well as reproductive biotechnologies. In the present work we report isolation and characterization of mesenchymal stem cells (MSCs) derived from adipose tissue of cattle and buffaloes. Cells isolated by enzymatic digestion of adipose-tissue biopsy were grown for at least ten passages in vitro giving support to of their proliferative capacity. These cells were also subjected to immunophenotypic characterization to visualize the presence, of CD90, CD105 and CD79, and absence, of CD45, CD34 and CD73, wich are positive and negative markers of MSCs, respectively. In order to determine their multipotency, the cells were induced to differentiate into three different cell types and stained with tissue-specific dyes (Chondrogenic-Alcian Blue, Osteogenic- Alizarin Red and Adipogenic-Oil-Red O) to ensure their differentiation into chondrocytes, ostoblasts and adipocytes. Our results indicate that adipose tissue of cattle and buffaloes can be used as a source of mesenchymal stem cells (MSCs), turning them into an interesting option of animal models for cell therapy and regenerative medicine. Additionally, these cells may be relevant for reproductive biotechnology since the use of MSCs as nuclear donors has been linked to an increase in the developmental rates of cloned embryos.
Acesso aberto (Open Access)
Stem cells from adipose tissue improve the time of wound healing in rats
(Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia, 2016-12) OHASHI, Camila Melo; CALDEIRA, Fabio Alves Morikawa; FEITOSA JUNIOR, Denilson José Silva; VALENTE, André Lopes; DUTRA, Paulo Roberto Witter; MIRANDA, Moysés dos Santos; SANTOS, Simone do Socorro Damasceno; BRITO, Marcus Vinicius Henriques; OHASHI, Otávio Mitio; YASOJIMA, Edson Yuzur
PURPOSE: To evaluate the Adipose Stem Cells (ACS) therapy efficacy on the time and quality of wound healing process in rats. METHODS: Nine male Wistar rats were randomly distributed into three groups I) 7 days of healing; II) 14 days of healing; III) 21 days of healing. Four incisions were made on the dorsal surface of each rat and then treated with intralesional ACS, meloxicam, and no treatment and ACS+meloxicam. Macroscopic evaluation was measured by percentage of healing and histopathological by hematoxylineosin was performed. RESULTS: All groups have the wound reduced during the three weeks (p<0.001) and after 14 days of healing had greater reduction than others. Wounds treated with ASC had accelerated healing in relation to no treatment and only meloxicam (p<0.001), excepting the ASC+Meloxicam that was similar (p=0.13). There was no difference in histopathological analysis between lesions. CONCLUSION: Adipose stem cell have benefits in reducing time of healing of experimental model of wound in rats, observed 7 days of after application.