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Expression and vitamin D-mediated regulation of matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) in healthy skin and in diabetic foot ulcers.

Abstract：

:Diabetic foot ulcers (DFUs) are chronic wounds with high matrix metalloproteinase (MMP) activity, and are a frequent complication on diabetics. This work studied the expression of selected MMP and tissue inhibitor of metalloproteinases (TIMP) gene family members in DFU and normal skin biopsies, and in vitamin D-treated keratinocytes cultured from those biopsies. We report for the first time the expression of some of these genes in healthy skin. Our results suggest that vitamin D may modulate the expression of some MMP gene family members in keratinocytes. Gene expression in DFU and in non-diabetic healthy skin (control) biopsies was evaluated by RT-qPCR for MMP-1, MMP-3, MMP-8, MMP-9, MMP-10, MMP-19, TIMP-1 and TIMP-2, and also by immunohistochemistry for MMP-1 and MMP-9. Primary keratinocytes cultured from DFU and healthy skin biopsies were used for gene expression analyses of selected MMPs and TIMPs by RT-qPCR, both in the presence and absence of calcitriol. The expression of MMP-1, MMP-8, MMP-9, MMP-10, and TIMP-2 in healthy skin is reported here for the first time. DFUs showed increased MMP-1, MMP-9 and TIMP-1 expression, compared to healthy skin. Calcitriol down-regulated MMP-1 and MMP-10 expression in DFU-derived keratinocytes but not in those derived from healthy skin. Our data demonstrate the expression of certain MMPs that had not been previously described in healthy skin, and further support previous reports of MMP and TIMP up-regulation in DFUs. Our results point to calcitriol as a potential modulator for the expression of certain MMP members in DFUs.

journal_name

Arch Dermatol Res

journal_title

Archives of dermatological research

authors

López-López N,González-Curiel I,Treviño-Santa Cruz MB,Rivas-Santiago B,Trujillo-Paez V,Enciso-Moreno JA,Serrano CJ

doi

10.1007/s00403-014-1494-2

subject

Has Abstract

pub_date

2014-11-01 00:00:00

pages

809-21

issue

eissn

0340-3696

issn

1432-069X

journal_volume

306

pub_type

杂志文章

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Expression and vitamin D-mediated regulation of matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) in healthy skin and in diabetic foot ulcers.