| Difference in uptake of junctional epithelium using microperoxidase and horseradish peroxidase as tracers in healthy rat gingiva | |
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MedLine Citation:
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PMID: 2519254 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A microperoxidase (MP, molecular weight 1,900; molecular diameter 20 A) or a horseradish peroxidase (HRP, molecular weight 40,000; molecular diameter 40 A) was intravenously injected into healthy rat junctional epithelium (JE) to investigate the endocytosis of foreign substances. By light microscopy, intravenous HRP was taken up throughout the JE, and the uptake was marked at the coronal portion of the JE. On the other hand, MP was taken up by only the coronal portion of the JE. At the electron microscopic level, the tracers were taken up by endocytotic organellae (phagosomes and micropinocytotic vesicles) of junctional epithelial cells (JE cells). HRP-positive endocytotic organellae in the JE cells were more numerous than MP-positive organellae. Thus, JE, especially its coronal portion, exhibited strong endocytotic activity for HRP compared with that for MP. These findings suggest that the JE has selective endocytotic ability for foreign substances, and plays an important role in protecting periodontal tissue. |
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Authors:
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N Ayasaka; H Nakamura; T Tanaka |
Publication Detail:
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Type: English Abstract; Journal Article |
Journal Detail:
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Title: Shika Kiso Igakkai zasshi = Japanese journal of oral biology Volume: 31 ISSN: 0385-0137 ISO Abbreviation: Shika Kiso Igakkai Zasshi Publication Date: 1989 Feb |
Date Detail:
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Created Date: 1991-11-22 Completed Date: 1991-11-22 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7506047 Medline TA: Shika Kiso Igakkai Zasshi Country: JAPAN |
Other Details:
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Languages: jpn Pagination: 61-71 Citation Subset: D |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Endocytosis* Epithelial Attachment / enzymology, metabolism* Gingiva / metabolism* Horseradish Peroxidase / metabolism Peroxidases / metabolism Rats |
| Chemical | |
Reg. No./Substance:
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EC 1.11.1.-/Horseradish Peroxidase; EC 1.11.1.-/Peroxidases; EC 1.11.1.-/microperoxidase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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