Marcadores de lesão cerebral e síndrome das apnéias-hipopnéias obstrutivas do sono em indivíduos obesos mórbidos

• Ano de defesa: 2006
• Autor(a) principal: Silva, Leandro Giacometti da
• Orientador(a): Dias, Renato Dutra
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul; Porto Alegre
• Palavras-chave em Português: BIOLOGIA CELULAR; BIOLOGIA MOLECULAR; OBESIDADE MÓRBIDA; SÍNDROME DAS APNEIAS OBSTRUTIVAS DO SONO; LESÕES CEREBRAIS; PROTEÍNAS; ASTRÓCITOS
• Link de acesso: http://hdl.handle.net/10923/1269

Background: obstructive sleep apnea-hypopnea syndrome (OSAHS) is considered a comorbity associated to morbid obesity mainly due to the large neck circumference. Depending on its severity, OSAHS can interfere in many systems homeostasis as, for example, central nervous system (CNS). Neuron Specific enolase (NSE) and S100B protein provenient from astrocytes, are considered sensible cerebral injury biochemical markers. We evaluated in this study, serum S100B and NSE levels, with the objective to mark possible cerebral injuries of OSAHS over CNS. Methods: this is a transversal study with data provenient from 25 OSAHS morbid obese patients. Blood samples were collected before and after polisomnographic exam for S100B and NSE protein dosage. We also analyzed data provenient from depression and excessive daytime sleepiness. Results: S100B levels were higher after [0,029 (0,010-0,199) than before [0,010 (0,010-0,025) ] PSG (P=0,002). S100B levels are expressed in median and IQ25-IQ75. NSE levels did not show significative diferences between after and before PSG. Conclusions: Study shows significative S100B level variations when compared after and before PSG. This suggests that there is a CNS astrocyte reaction because of possible cerebral hypoxemy in OSAHS morbidly obese patients.