| Immunodetection and localization of protein(s) related to retinal S-antigen (arrestin) in kidney. | |
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MedLine Citation:
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PMID: 1300198 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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S-antigen (arrestin) is a cytosolic protein which regulates phototransduction in retinal rods. A protein immunologically related to S-antigen was identified in fractions from soluble extract of bovine kidney enriched by gel filtration or by immunoaffinity chromatography using a polyclonal antibody to retinal S-antigen. On immunoblots, this protein was recognized by a panel of monoclonal antibodies (mAbs S2D2, S1A3 and S9E2) directed against different S-antigen epitopes and displayed the same apparent molecular mass (48 kDa) as retinal S-antigen. All three mAbs revealed a specific immunoreactivity by indirect immunocytochemical technique on rat kidney sections. The three mAbs recognized some but not all glomerular cells, identified as epithelial cells by immunoelectron microscopy using the mAb S9E2. Both mAbs S2D2 and S1A3 gave a diffuse cytoplasmic staining in all tubule cells. Proximal tubule cells exhibited a weak immunoreactivity, whereas distal and collecting tubule cells were strongly labeled. In contrast, the mAb S9E2 immunoreaction was restricted to a cell subpopulation from distal and collecting tubules corresponding to intercalated cells identified by immunoelectron microscopy. With the mAb S9E2, the labeling of proximal tubule cells was localized in the apical region of the cytoplasm. These results suggest that two or more 48-kDa proteins immunologically cross-reactive with retinal S-antigen are present in kidney. The observed pattern of distribution is in keeping with the hypothesis that such proteins could play a role in the regulation of G-protein-related receptors present in renal glomerulus and tubule epithelial cells. |
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Authors:
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M Mirshahi; A Razaghi; A Vandewalle; F Cluzeaud; M Tarraf; J P Faure |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Biology of the cell / under the auspices of the European Cell Biology Organization Volume: 76 ISSN: 0248-4900 ISO Abbreviation: Biol. Cell Publication Date: 1992 |
Date Detail:
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Created Date: 1993-05-24 Completed Date: 1993-05-24 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8108529 Medline TA: Biol Cell Country: FRANCE |
Other Details:
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Languages: eng Pagination: 175-84 Citation Subset: IM |
Affiliation:
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INSERM U86, Centre de Recherches Biomédicales des Cordeliers, Paris, France. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acid Sequence Animals Antibodies, Monoclonal / chemistry Antigen-Antibody Reactions Antigens / analysis*, immunology, ultrastructure Arrestin Cattle Epithelium / chemistry, immunology, ultrastructure Eye Proteins / analysis*, immunology, ultrastructure Kidney Tubules / chemistry*, immunology, ultrastructure Molecular Sequence Data Rats Rats, Inbred Lew |
| Chemical | |
Reg. No./Substance:
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0/Antibodies, Monoclonal; 0/Antigens; 0/Arrestin; 0/Eye Proteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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