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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Driever, Wolfgang Malbouyres, Marilyne Lambert, Elise Ruggiero, Florence Bader, Hannah L. Koch, Manuel Guiraud, Alexandre |
| Description | Author Affiliation: Bader HL ( Institut de Génomique Fonctionnelle de Lyon, UMR 5242 CNRS, Ecole Normale Supérieure de Lyon, Université Lyon 1, F-69364 Lyon Cedex 07, France.) |
| Abstract | We found that zebrafish has two differentially expressed col14a1 paralogs. col14a1a expression peaked between 18-somite stage and 24 hours postfertilization (hpf), whereas col14a1b was first expressed at 32 hpf. To uncover functions of collagen XIV (COLXIV) during early embryogenesis, we focused our study on col14a1a. We characterized the 1 (XIV-A) chain as a collagenase-sensitive 200-kDa protein that formed dimer that could be reduced at high pH. As observed for the transcript, COLXIV-A protein expression peaked between 24 and 48 hpf. Using antisense probes and polyclonal antibodies, we show that col14a1a and its protein product COLXIV-A are transiently expressed in several epithelia, including epithelia undergoing shape changes, such as the fin folds. In contrast, anti-COLXII antibodies stained only connective tissues. COLXIV-A was also detected in the basement membrane (BM), where it co-localized with COLXII. At later developmental stages, COLXIV-A was not expressed in epithelia anymore but persisted in the BM. Morpholino knockdown of COLXIV-A provoked a skin detachment phenotype. Electron microscopy analysis revealed that morpholino-injected embryos lacked a lamina densa and lamina lucida at 24 hpf, and BM defects, such as gaps in the adepidermal granules, were still detected at 48 hpf. These BM defects were accompanied by a rupture of the dermis and detachment of the epidermis. Taken together, these data suggest an unexpected role of COLXIV-A in undifferentiated epithelia and in the formation of embryonic basement membranes. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 10 |
| Volume Number | 288 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2013-03-08 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Collagen Genetics Epithelium Metabolism Gene Expression Regulation, Developmental Zebrafish Proteins Zebrafish Amino Acid Sequence Animal Fins Embryology Animals Basement Membrane Blotting, Western Embryo, Nonmammalian Ultrastructure Gene Knockdown Techniques In Situ Hybridization Microscopy, Confocal Microscopy, Electron, Transmission Molecular Sequence Data Protein Isoforms Reverse Transcriptase Polymerase Chain Reaction Sequence Homology, Amino Acid Time Factors Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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