title: Matrix metalloproteinases of epithelial origin in facial sebum of patients with acne and their regulation by isotretinoin.
abstract: Acne vulgaris is a skin disorder of the sebaceous follicles, involving hyperkeratinization and perifollicular inflammation. Matrix metalloproteinases (MMP) have a predominant role in inflammatory matrix remodeling and hyperproliferative skin disorders. We investigated the expression of MMP and tissue inhibitors of MMP (TIMP) in facial sebum specimens from acne patients, before and after treatment with isotretinoin. Gelatin zymography and Western-blot analysis revealed that sebum contains proMMP-9, which was decreased following per os or topical treatment with isotretinoin and in parallel to the clinical improvement of acne. Sebum also contains MMP-1, MMP-13, TIMP-1, and TIMP-2, as assessed by ELISA and western blot, but only MMP-13 was decreased following treatment with isotretinoin. The origin of MMP and TIMP in sebum is attributed to keratinocytes and sebocytes, since we found that HaCaT keratinocytes in culture secrete proMMP-2, proMMP-9, MMP-1, MMP-13, TIMP-1, and TIMP-2. SZ95 sebocytes in culture secreted proMMP-2 and proMMP-9, which was also confirmed by microarray analysis. Isotretinoin inhibited the arachidonic acid-induced secretion and mRNA expression of proMMP-2 and -9 in both cell types and of MMP-13 in HaCaT keratinocytes. These data indicate that MMP and TIMP of epithelial origin may be involved in acne pathogenesis, and that isotretinoin-induced reduction in MMP-9 and -13 may contribute to the therapeutic effects of the agent in acne.
authors.affiliation: Department of Pharmacology, School of Medicine, Aristotle University, Thessaloniki, Greece.
authors.forename: Eleni
authors.initials: E
authors.lastname: Papakonstantinou
authors.forename: Alexios J
authors.initials: AJ
authors.lastname: Aletras
authors.forename: Evelyn
authors.initials: E
authors.lastname: Glass
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Tsogas
authors.forename: Alexander
authors.initials: A
authors.lastname: Dionyssopoulos
authors.forename: James
authors.initials: J
authors.lastname: Adjaye
authors.forename: Sabine
authors.initials: S
authors.lastname: Fimmel
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Gouvousis
authors.forename: Ralf
authors.initials: R
authors.lastname: Herwig
authors.forename: Hans
authors.initials: H
authors.lastname: Lehrach
authors.forename: Christos C
authors.initials: CC
authors.lastname: Zouboulis
authors.forename: George
authors.initials: G
authors.lastname: Karakiulakis
mesh_terms: D000152:Acne Vulgaris / Q000188:drug therapy / Q000201:enzymology* / Q000209:etiology; D000293:Adolescent; D001419:Bacteria / Q000302:isolation & purification; D015153:Blotting, Western; D002478:Cells, Cultured; D017364:Collagenases / Q000032:analysis; D004797:Enzyme-Linked Immunosorbent Assay; D005145:Face; D005260:Female; D018093:Gelatinases / Q000032:analysis; D006801:Humans; D015474:Isotretinoin / Q000494:pharmacology* / Q000627:therapeutic use; D015603:Keratinocytes / Q000201:enzymology; D020782:Matrix Metalloproteinases / Q000032:analysis*; D012333:RNA, Messenger / Q000032:analysis; D012629:Sebum / Q000166:cytology / Q000201:enzymology* / Q000382:microbiology; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000032:analysis / Q000235:genetics; D019716:Tissue Inhibitor of Metalloproteinase-2 / Q000032:analysis
chemical_list: D012333:RNA, Messenger; D019715:Tissue Inhibitor of Metalloproteinase-1; D019716:Tissue Inhibitor of Metalloproteinase-2; D017364:Collagenases; D018093:Gelatinases; D020782:Matrix Metalloproteinases; D015474:Isotretinoin