The Endogenous Protease Inhibitor TIMP-1 Mediates Protection and Recovery from Cutaneous Photodamage  Urara Yokose, Akira Hachiya, Penkanok Sriwiriyanont,

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The Endogenous Protease Inhibitor TIMP-1 Mediates Protection and Recovery from Cutaneous Photodamage  Urara Yokose, Akira Hachiya, Penkanok Sriwiriyanont, Tsutomu Fujimura, Marty O. Visscher, William J. Kitzmiller, Alexander Bello, Ryoji Tsuboi, Takashi Kitahara, Gary P. Kobinger, Yoshinori Takema  Journal of Investigative Dermatology  Volume 132, Issue 12, Pages 2800-2809 (December 2012) DOI: 10.1038/jid.2012.204 Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 1 Significantly lower expression of tissue inhibitor of metalloproteinase (TIMP)-1 in photodamaged/photoaged and intrinsically aged skins. (a–c) Xenografted human skin 24 hours after the repetitive 6-week UVB exposures at 1–2 minimal erythema dose were collected and subjected to real-time reverse transcriptase PCR (RT-PCR) analyses of TIMP-1 (a), TIMP-2 (b), and TIMP-3 (c) transcript expression using the ABI Prism 7300 sequence detection system. (d) Total RNAs extracted from human skin biopsies at the ventral area of upper arms donated by young (26- to 28-year-old, n=4) and old (50- to 52-year-old, n=3) Caucasian women were used. *P<0.05. (e, f) Immunohistological staining for TIMP-1 expression was demonstrated using the paraffin-embedded sections. Xenografted human skins with or without UVB irradiation for 8 weeks (e) and biopsied skins from upper arm of 30-year-old (young) and 60-year-old (old) Caucasian women (f) were stained. Bars=50μm. Journal of Investigative Dermatology 2012 132, 2800-2809DOI: (10.1038/jid.2012.204) Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 2 Acceleration of photodamage by inhibition of tissue inhibitor of metalloproteinase (TIMP)-1 in xenografted human skin during the course of UVB exposure. (a) En face representative images of xenografted skin were captured at 0, 2, 4, and 6 weeks using a handheld Charm View microscope. Nonspecific IgG control (nonspecific IgG), TIMP-1-neutralizing antibody (NAB) treatment (TIMP-1 NAB), UVB irradiation with nonspecific IgG treatment (nonspecific IgG+UVB), and UVB irradiation with TIMP-1 NAB treatment (TIMP-1 NAB+UVB). Bars=3mm. (b) Skin profilometry of replicas used to evaluate the surface roughness with arithmetic mean roughness (Sa) and arithmetic average of maximum peak to valley height (Sz) as parameters. N=7 in each group. *P<0.05, **P<0.01; versus the values of 0 weeks or IgG controls. Journal of Investigative Dermatology 2012 132, 2800-2809DOI: (10.1038/jid.2012.204) Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 3 Protection of skin from photodamage by overexpression of tissue inhibitor of metalloproteinase (TIMP)-1. (a) Lentiviral vectors were intradermally injected into skin xenografts, followed by continuous UVB irradiation as indicated. (b) En face representative images were captured at 0, 6, 10, 14, and 20 weeks. Non-UVB-irradiated reporter gene control, UVB-irradiated reporter gene control, and TIMP-1-overexpressed skin with repetitive UVB exposure are shown at the top, middle, and bottom, respectively. Bars=3mm. (c) Skin profilometry of replicas at the indicated time points. *P<0.05, **P<0.01. (d) For skin elasticity measurement, a 5-second load of 200hPa was applied, followed by a 2-second relaxation period. **P<0.01. Journal of Investigative Dermatology 2012 132, 2800-2809DOI: (10.1038/jid.2012.204) Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 4 Tissue inhibitor of metalloproteinase (TIMP)-1 overexpression suppresses the UVB-induced degradation of collagens, resulting in the protection and improvement of photodamaged skin. (a) Immunohistological staining with rabbit polyclonal antihuman collagen I and normal rabbit IgG was performed on paraffin-embedded sections obtained from skins treated with a reporter gene–overexpressing vector with or without UVB irradiation for 8 weeks and from the UVB-exposed skin with overexpression of TIMP-1. Bars=100μm. (b) Masson's Trichrome staining was performed at the same time points as mentioned above. Bars=20μm. (c) Immunohistological staining was conducted to detect collagen IV at 6 weeks after the final UVB irradiation. Bars=100μm. (d) After repetitive UVB exposure for 4 weeks, matrix metalloproteinase (MMP) activities (MMP-1/MMP-9) in control and TIMP-1-overexpressed xenograft skins were measured as described in the Materials and Methods section. N=5∼6 in each group. *P<0.05. Journal of Investigative Dermatology 2012 132, 2800-2809DOI: (10.1038/jid.2012.204) Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 5 Protection of elastin fibers from UVB-induced digestion in xenografted human skin. (a) To evaluate the role of tissue inhibitor of metalloproteinase (TIMP)-1 in the protection of elastic fibers, Luna staining was conducted on paraffin-embedded sections from controls (nonexposed and 4-week-exposed skin with a reporter gene overexpression) and from TIMP-1-overexpressed skins with repetitive UVB irradiation. (Top) Papillary dermis. (Bottom) Reticular dermis. Bars=50μm. (b) Immunohistological staining with antihuman fibrillin-1 antibody, antihuman elastin antibody, or control IgG was performed. Bars=50μm. (c) Matrix metalloproteinase (MMP)-12 activities in UVB-irradiated or nonexposed skins with reporter gene or TIMP-1 overexpression at 10 weeks were assessed using the SensoLyte 520 MMP-12 Assay Kit Fluorimetric. **P<0.01. Journal of Investigative Dermatology 2012 132, 2800-2809DOI: (10.1038/jid.2012.204) Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions

Figure 6 UVB-induced increase in secretion of tumor necrosis factor (TNF)-α is prevented by tissue inhibitor of metalloproteinase (TIMP)-1. Two lines of human keratinocytes incubated with human recombinant TIMP-1 (hrTIMP-1) protein (R&D Systems) at concentrations of 5 or 10nM were exposed to 30mJcm–2 UVB twice with a 48-hour interval to emphasize the reaction of cutaneous cells against UVB irradiation. Twelve hours after the second irradiation, the conditioned media were collected and TNF-α levels were measured by ELISA. The concentration of TNF-α was normalized by the total protein amount of keratinocytes. One of the series of experiments is representatively demonstrated. N=3 in each group. **P<0.01, *P<0.05. Journal of Investigative Dermatology 2012 132, 2800-2809DOI: (10.1038/jid.2012.204) Copyright © 2012 The Society for Investigative Dermatology, Inc Terms and Conditions