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Single-chain tissue-type plasminogen activator is a substrate of mouse glandular kallikrein 24

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Title: Single-chain tissue-type plasminogen activator is a substrate of mouse glandular kallikrein 24
Authors: Matsui, Hitoshi Browse this author
Takano, Naoharu Browse this author
Moriyama, Akihiko Browse this author
Takahashi, Takayuki Browse this author →KAKEN DB
Keywords: testis
proteolytic processing
mouse spermatogenesis
extracellular matrix
Issue Date: Oct-2005
Publisher: Zoological Society of Japan
Journal Title: Zoological Science
Volume: 22
Issue: 10
Start Page: 1105
End Page: 1111
Publisher DOI: 10.2108/zsj.22.1105
PMID: 16286722
Abstract: Leydig cells of the adult mouse testis express at a detectable level three distinct glandular (tissue) kallikrein genes: mKlk21, mKlk24, and mKlk27. Recently, the proteins encoded by these genes were characterized using active recombinant proteases, but their roles in the mouse testis remained to be determined. The present study showed that among the proteases, mK24 markedly enhanced the activity of human recombinant single-chain tissue-type plasminogen activator when the two were incubated together. This activation was found to be due to proteolytic conversion of the single-chain enzyme to a two-chain form. The expression of tissue-type plasminogen activator in interstitial Leydig cells was demonstrated by RT-PCR and immunohistochemical analyses. The primary culture medium of adult male testicular Leydig cells contained immunoreactive substances recognized by anti-mK24 antibodies. In addition, the same medium was capable of converting the single-chain plasminogen activator to the two-chain protein. These results suggest that mK24 may play a role in the degradation of extracellular matrix proteins in the interstitial area surrounding the Leydig cells of the adult mouse testis, due not only to its own activity, but also to that of plasmin produced by the single-chain tissue-type plasminogen activator-converting activity of mK24.
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋 孝行

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