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Ontogeny of alpha-crystallin subunits in the lens of human and rat embryos.

Authors: Oguni, M  Setogawa, T  Hashimoto, R  Tanaka, O  Shinohara, H  Kato, K 
Citation: Oguni M, etal., Cell Tissue Res. 1994 Apr;276(1):151-4.
Pubmed: (View Article at PubMed) PMID:8187157

The distribution of alpha A- and alpha B-crystallin in the developing lens of human (Carnegie stages 13 to 23) and rat embryos (embryonic days E11 to 18) was examined immunohistochemically. In a human embryo at stage 13, the lens placode was already immunoreactive to alpha B-crystallin, but not to alpha A-crystallin. At stage 15, the lens vesicle was intensely immunoreactive both to alpha A- and alpha B-crystallin. From stages 16 to 23, the lens epithelial cells and fiber cells were immunoreactive to alpha A- and alpha B-crystallin. In rat embryos, alpha A-crystallin appeared in the lens pit at E12, and alpha B-crystallin appeared in the elongating lens fiber cells at E14. From E15 to E18, the lens epithelial cells and fiber cells were immunoreactive to alpha A-crystallin. The lens fiber cells were also immunoreactive to alpha B-crystallin, but the epithelial cells were not. These findings suggest that alpha B-crystallin appears earlier than alpha A-crystallin in the human lens, but at a later period than alpha A-crystallin in the rat lens. alpha B-Crystallin was not detected in the epithelial cells of the rat lens, but was persistently present in the epithelial cells of the human lens.

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CRRD Object Information
CRRD ID: 1600991
Created: 2007-04-02
Species: All species
Last Modified: 2007-04-02
Status: ACTIVE



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