Hyperbaric oxygen as a signal transducer: upregulation of platelet derived growth factor-beta receptor in the presence of HBO2 and PDGF.
Undersea Hyperb Med
; 25(4): 211-6, 1998.
Article
em En
| MEDLINE
| ID: mdl-9883488
ABSTRACT
The purpose of this study was to test the hypothesis that hyperbaric oxygen (HBO2) may function by modifying the signal transduction pathway of growth factors or their receptors, or both. Studies were conducted with platelet derived growth factor (PDGF) and HBO2 using an established rabbit ear wound model. PDGF, a dimeric compound composed of A chain and B chain components, is found as PDGF-A, AB, and BB. It exerts its effects on cells by binding to one of two membrane-bound receptors, the alpha receptor or the beta receptor. Acutely ischemic wounds in rabbit ears were treated with saline or PDGF-BB and then animals were treated with hyperbaric air or oxygen at 2 atm abs (202.6 kPa). Hyperbaric air was without significant effect compared with control rabbits who breathed air at ambient pressure. Combined treatment with HBO2 plus PDGF-BB was synergistic in upregulating mRNA for PDGF-beta receptor. No treatments, whether alone or in combination, altered mRNA levels for PDGF-alpha receptor or for PGDF-A.
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Base de dados:
MEDLINE
Assunto principal:
Cicatrização
/
Ferimentos e Lesões
/
Fator de Crescimento Derivado de Plaquetas
/
Transdução de Sinais
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Receptores do Fator de Crescimento Derivado de Plaquetas
/
Oxigenoterapia Hiperbárica
Idioma:
En
Ano de publicação:
1998
Tipo de documento:
Article