Document Detail

Distribution of tenascin-C and tenascin-X, apoptotic and proliferating cells in postnatal soft-diet rat temporomandibular joint (TMJ).
MedLine Citation:
PMID:  16551009     Owner:  NLM     Status:  MEDLINE    
We immunohistochemically examined the relationship between the distribution of extracellular matrix glycoproteins (tenascin-C and tenascin-X), apoptotic cells, and proliferating cells to determine the effect of a soft diet in the rat temporomandibular joint (TMJ) over a period of 4 weeks from 21 days of age. Using confocal Laser scanning microscopy, strong expression of tenascin-C and tenascin-X was found in the soft-diet group, mainly from the proliferative layer to the cartilage layer of the condyle, and posterior and anterior regions of the disk, in contrast to that of the control group, which was fed a hard diet. The number of proliferating cells in the soft-diet group was lower than that in the control group and was especially low in the calcified zone and proliferative cell layer of the sagittal section of the TMJ. The apoptotic cells were found mainly in the endochondral ossification layer of the condyle. On day 28 in the soft-diet group, they were also highly concentrated in endochondral ossification layer of the anterior condyle beneath the disk. A few apoptotic cells were observed in the synovial membrane and the disk. These distributions reflect the process of replication in the TMJ in accordance with the feeding of a soft diet.
Iwao Sato; Ryuji Uneno; Yoko Miwa; Masataka Sunohara
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Annals of anatomy = Anatomischer Anzeiger : official organ of the Anatomische Gesellschaft     Volume:  188     ISSN:  0940-9602     ISO Abbreviation:  Ann. Anat.     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-03-22     Completed Date:  2006-05-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100963897     Medline TA:  Ann Anat     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  127-36     Citation Subset:  IM    
Department of Anatomy, School of Dentistry at Tokyo, Nippon Dental University, 1-9-20 Fujimi Chiyoda-Ku, Tokyo 102-8159, Japan.
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MeSH Terms
Animal Feed*
Apoptosis / physiology*
Cell Division / physiology*
Proliferating Cell Nuclear Antigen / analysis
Temporomandibular Joint / cytology*,  growth & development
Tenascin / metabolism*
Reg. No./Substance:
0/Proliferating Cell Nuclear Antigen; 0/Tenascin; 0/tenascin X

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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