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Master's Dissertation
DOI
https://doi.org/10.11606/D.85.2011.tde-15092011-143356
Document
Author
Full name
Silvana Cereijido Altran
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Mathor, Monica Beatriz (President)
Herson, Marisa Roma
Isaac, Cesar
Title in Portuguese
Substituição dos componentes xenobióticos empregados no meio de cultura para manutenção de queratinócitos humanos, por similares de origem humana
Keywords in Portuguese
componentes xenobióticos
lisado de plaquetas
meio de cultura alternativo
queratinócitos
Abstract in Portuguese
Epitélios confluentes de queratinócitos autólogos, cultivados segundo metodologia padronizada por Rheinwald e Green em 1975, têm sido usados como enxertos em diferentes situações clínicas. Contudo, a presença de componentes xenobióticos empregados nesta metodologia implica na possibilidade de transmissão de zoonoses, príons e viroses aos pacientes, além de envolver questões éticas relacionadas à utilização de animais. Tais preocupações têm direcionado pesquisadores a buscar alternativas que superem este impasse; no entanto, as formulações obtidas até o momento não são completamente satisfatórias. Assim, nossa proposta neste estudo, foi omitir ou substituir os componentes xenobióticos tradicionalmente utilizados no meio para queratinócitos, por similares humanos. Como resultado, padronizamos um meio de cultura onde omitimos o emprego de toxina colérica, substituímos o soro fetal bovino por lisado de plaquetas humanas na concentração de 2,5% e a insulina de origem bovina foi substituída por insulina recombinante humana na mesma concentração do método original (5 μg/mL). Com os resultados obtidos foi possível concluir ser viável o cultivo de queratinócitos humanos, mantidos em meio de cultura livre de componentes xenobióticos.
Title in English
Replacement of xenobiotic components, applied in the culture medium for maintenance of human keranocytes, by human similar
Keywords in English
alternative culture medium
keratinocytes
platelet lysate
xenobiotic components
Abstract in English
Confluent epithelia of autologous keratinocytes, cultivated according to standardized methodology by Rheinwald and Green in 1975, have been used as grafts in different clinical situations. However, the presence of xenobiotics components applied in this method implies the possibility of transmission of zoonoses, príons, and viruses to patients, besides involving ethical issues related to the use of animals for components obtainment. Such concerns have driven researchers to seek alternatives that overcome this deadlock, as the formulations obtained so far are not completely satisfactory. Thus, our proposal in this study was to omit or replace the xenobiotics components traditionally used in the medium to keratinocytes culture, by human similar. As a result, we have standardized a culture medium whereby we omitted the use of cholera toxin, replaced fetal bovine serum by human platelet lysate at a 2.5% concentration and bovine insulin was replaced by recombinant human insulin at the same concentration as the original method (5 μg/mL). With the results obtained we could conclude that the method to be viable to cultivate human keratinocytes, kept in culture medium free of xenobiotics components.
 
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Publishing Date
2011-10-14
 
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