Glyoxalase I activity and immunoreactivity in the aging human lens.
Biogerontology
; 10(6): 711-20, 2009 Dec.
Article
en En
| MEDLINE
| ID: mdl-19238574
ABSTRACT
Glyoxalase I (GLOI) is the first enzyme of the glyoxalase system that catalyzes the metabolism of reactive dicarbonyls, such as methylglyoxal (MGO). During aging and cataract development, human lens proteins are chemically modified by MGO, which is likely due to inadequate metabolism of MGO by the glyoxalase system. In this study, we have determined the effect of aging on GLOI activity and the immunoreactivity and morphological distribution of GLOI in the human lens. A monoclonal antibody was developed against human GLOI. GLOI immunoreactivity was strongest in the anterior epithelial cells and weaker in rest of the lens. Cultured human lens epithelial cells showed immunostaining throughout the cytoplasm. In the human lens, GLOI activity and immunoreactivity both decreased with age. We believe that this would lead to promotion of MGO-modification in aging lens proteins.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Envejecimiento
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Inmunohistoquímica
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Senescencia Celular
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Células Epiteliales
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Lactoilglutatión Liasa
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Cristalino
Límite:
Adolescent
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Adult
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Aged
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Aged80
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Child
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Humans
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Middle aged
Idioma:
En
Año:
2009
Tipo del documento:
Article