Abstract:
BACKGROUND:Ultraviolet (UV) A irradiation causes the degeneration of extracellular matrix in the skin dermis, mainly due to disrupted collagen homeostasis, resulting in the photo-aging of human skin. All-trans retinoic acid (ATRA) improves photo-aged human skin in vivo. OBJECTIVES:Although the effects of ATRA on collagen synthesis and MMP regulation are well known, the effects of ATRA on other collagen homeostasis-associated genes have not been elucidated. This study was aimed to study the factors that are pharmacologically associated with the effect of ATRA on collagen homeostasis. METHODS:The gene transcription profile of collagen homeostasis-associated genes was systematically evaluated in three-dimensional human dermal equivalents (HDEs) following UVA-irradiation and/or ATRA treatment. RESULTS:In addition to the expected changes in MMPs and collagen synthesis in HDEs in response to ATRA, prolidase, an important enzyme in the recycling of proline and hydroxyproline from degraded collagen molecules, was significantly decreased by UVA irradiation, and its down-regulation was antagonized by ATRA. Transfection with a prolidase-specific siRNA led to a significant decrease in procollagen synthesis in human fibroblasts. ATRA inhibited the UVA irradiation-induced decrease in prolidase activity through an insulin-like growth factor (IGF) receptor signaling pathway in HDEs. ARTA increased IGF1 and IGF2 production in HDEs, and neutralizing IGFs with anti-IGF antibodies abolished the effect of ATRA on proliase activity. CONCLUSIONS:These data demonstrate that ATRA regulates prolidase activity in HDEs via IGF receptor signaling, suggesting one of the pharmacological mechanisms by which improves photo-aged human skin.
journal_name
J Dermatol Scijournal_title
Journal of dermatological scienceauthors
Shim JH,Shin DW,Lee TR,Kang HH,Jin SH,Noh Mdoi
10.1016/j.jdermsci.2011.12.008subject
Has Abstractpub_date
2012-04-01 00:00:00pages
51-9issue
1eissn
0923-1811issn
1873-569Xpii
S0923-1811(11)00358-6journal_volume
66pub_type
杂志文章abstract:BACKGROUND:Sarcoidosis is a systemic granulomatous disease characterized by the combination of Th1 and Th17 responses. Recently, several arguments have suggested a potential involvement of B cells as well as T cells in the pathogenesis of sarcoidosis. Follicular helper CD4+ T (TFH) cells are specialized in interacting ...
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abstract:BACKGROUND:Atopic dermatitis is a common skin disease characterized by a Th2 cell-dominant inflammatory infiltrate, elevated serum IgE levels and impaired epidermal barrier function. It is associated to abnormal epidermal lamellar body secretion, producing alteration in lipid composition and extracellular lamellar memb...
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abstract::Systemic sclerosis (SSc) is a connective tissue disease with unknown etiology characterized by excessive deposition of collagen in the skin as well as various internal organs. One of the characteristic histological features is the presence of infiltrating mononuclear cells in the dermis in its early stage. As well as ...
journal_title:Journal of dermatological science
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doi:10.1016/s0923-1811(00)00169-9
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abstract::Epidermolysis bullosa simplex associated with late onset of muscular dystrophy has been found to show defective expression of plectin, an intracytoplasmic protein in hemidesmosomes. In this report, we examined ability of cell-to-matrix attachment of cultured keratinocytes derived from a case with this disease by vario...
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abstract:BACKGROUND:NIPAL4, encoding the NIPA-like domain containing 4 protein (NIPAL4), is one of the causative genes of autosomal recessive congenital ichthyosis (ARCI). The physiological role of NIPAL4 and the pathogenetic mechanisms of ARCI caused by NIPAL4 mutations remain unclear. OBJECTIVE:To clarify the changes of cera...
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journal_title:Journal of dermatological science
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更新日期:1994-04-01 00:00:00
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doi:10.1016/0923-1811(94)00380-w
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abstract::It has recently been demonstrated that genetic defects in keratin genes cause a number of different skin disorders, including epidermolysis bullosa simplex (EBS), epidermolytic hyperkeratosis (EH), the EH form of epidermal nevi, epidermolytic and non-epidermolytic forms of palmoplantar keratoderma (EPPK and PPK) and p...
journal_title:Journal of dermatological science
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journal_title:Journal of dermatological science
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