Title : Doxycycline indirectly inhibits proteolytic activation of tryptic kallikrein-related peptidases and activation of cathelicidin.

Pub. Date : 2012 May

PMID : 22336948






5 Functional Relationships(s)
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1 The increased abundance and activity of cathelicidin and kallikrein 5 (KLK5), a predominant trypsin-like serine protease (TLSP) in the stratum corneum, have been implicated in the pathogenesis of rosacea, a disorder treated by the use of low-dose doxycycline. Doxycycline kallikrein related peptidase 11 Homo sapiens
2 Here we hypothesized that doxycycline can inhibit activation of tryptic KLKs through an indirect mechanism by inhibition of matrix metalloproteinases (MMPs) in keratinocytes. Doxycycline kallikrein related peptidase 11 Homo sapiens
3 However, when doxycycline or other MMP inhibitors were added to live keratinocytes during the production of tryptic KLKs, this treatment indirectly resulted in decreased TLSP activity. Doxycycline kallikrein related peptidase 11 Homo sapiens
4 However, when doxycycline or other MMP inhibitors were added to live keratinocytes during the production of tryptic KLKs, this treatment indirectly resulted in decreased TLSP activity. Doxycycline kallikrein related peptidase 11 Homo sapiens
5 Furthermore, doxycycline under these conditions inhibited the generation of the cathelicidin peptide LL-37 from its precursor protein hCAP18, a process dependent on KLK activity. Doxycycline kallikrein related peptidase 11 Homo sapiens