Detection of glycated fetal human lens crystallins by concanavalin-A and aldehyde staining.
Mech Ageing Dev
; 99(3): 167-79, 1997 Dec 30.
Article
en En
| MEDLINE
| ID: mdl-9483490
ABSTRACT
The binding of the lectin Concanavalin-A (Con-A) to crystallins was investigated. For this purpose, human fetal and juvenile lens crystallins were isofocused and specifically stained brown for glycoproteins by the lectin Con-A, and purple by the periodic acid Schiff's reagent (PAS). In reference experiments protein bands were stained with Coomassie Blue for proteins. Since Con-A is a protein with glucose-specific receptors, the following crystallins, glycated with this sugar, were visualized after isoelectric focusing HM-, beta L-, beta S- and gamma-crystallins, but not alpha L- and beta H-crystallins. Glycation increased significantly with fetal age. The crystallins themselves could also function as sugar receptors, because it was shown that they possessed also receptors for glucose, like Con-A. This crystallin receptor staining revealed beta L-, beta S-, gamma- but hardly HM-crystallins. The PAS, Con-A and receptor stainings gave in principle identical results. The glycoproteins Con-A, horseradish peroxidase and lentil lectins were used as positive controls.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Reacción del Ácido Peryódico de Schiff
/
Glicoproteínas
/
Concanavalina A
/
Cristalino
Tipo de estudio:
Diagnostic_studies
Límite:
Child
/
Humans
Idioma:
En
Revista:
Mech Ageing Dev
Año:
1997
Tipo del documento:
Article
País de afiliación:
Alemania