Document Detail

Cell-CAM105 isoforms with different adhesion functions are coexpressed in adult rat tissues and during liver development.
MedLine Citation:
PMID:  8454589     Owner:  NLM     Status:  MEDLINE    
The rat hepatocyte cell adhesion molecule cell-CAM105 has recently been shown to be composed of at least two isoforms. Expression of the two isoforms in different tissues and during fetal liver development in rats was studied by RNase protection using a probe which could specifically and simultaneously detect both isoforms. This probe revealed protected fragments of expected lengths for the L-form and the S-form in RNA samples isolated from various adult rat tissues. High levels of the L-form and S-form messages were detected in liver and intestine, moderate levels were detected in lung, and weak signals were detected in muscle, kidney, and spleen. In liver development studies, the messages for cell-CAM105 showed a major increase on the first day after birth compared to the fetal stage, and both isoform messages were proportionally increased. These results indicate that both cell-CAM105 isoforms may have function(s) related to hepatocyte differentiation. To study the adhesion function of cell-CAM105 isoforms, full-length cDNAs for these isoforms were expressed in insect cells. The insect cells expressing the L-form cell-CAM105 were found to aggregate. However, expression of S-form cell-CAM105 did not support cell aggregation. These results indicate that L-form, but not S-form, cell-CAM105 directly mediates the cell adhesion function.
P H Cheung; N L Thompson; K Earley; O Culic; D Hixson; S H Lin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of biological chemistry     Volume:  268     ISSN:  0021-9258     ISO Abbreviation:  J. Biol. Chem.     Publication Date:  1993 Mar 
Date Detail:
Created Date:  1993-04-22     Completed Date:  1993-04-22     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  2985121R     Medline TA:  J Biol Chem     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  6139-46     Citation Subset:  IM    
Department of Molecular Pathology, University of Texas M. D. Anderson Cancer Center, Houston 77030.
Data Bank Information
Bank Name/Acc. No.:
GENBANK/J04963;  Z12019
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MeSH Terms
Adenosine Triphosphatases*
Antigens, CD
Base Sequence
Blotting, Northern
Cell Adhesion*
Cell Adhesion Molecules / biosynthesis*
Cell Line
Cloning, Molecular
Fluorescent Antibody Technique
Liver / embryology,  growth & development,  metabolism*
Molecular Sequence Data
Rats, Inbred F344
Rats, Sprague-Dawley
Restriction Mapping
Species Specificity
Grant Support
Reg. No./Substance:
0/Antigens, CD; 0/CD66 antigens; 0/Cell Adhesion Molecules; 9007-49-2/DNA; EC 3.1.-/Ribonucleases; EC 3.6.1.-/Adenosine Triphosphatases

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