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Oral administration of collagen tripeptide improves dryness and pruritus in the acetone-induced dry skin model.

Abstract：

BACKGROUND:Dry skin causes pruritus and discomfort in patients with xerosis and atopic dermatitis. General treatment for skin dryness involves the topical application of an emollient. However, more effective, simpler therapies are desired. Collagen tripeptide (CTP) is a highly purified, non-antigenic, low-allergenic collagen fraction that is known to have various biological effects. OBJECTIVE:To clarify the therapeutic effects of CTP for dry skin using acetone-induced dry skin model mice. METHODS:ICR mice were treated with acetone followed by oral administration of CTP (80 or 500mg/kg/day) for 3 days. Hyaluronic acid production induced by CTP was assessed using human dermal fibroblasts in vitro and in an acetone-induced dry skin model mice in vivo. Transepidermal water loss (TEWL) and scratching behavior were evaluated. Furthermore, the effects of CTP on intraepidermal nerve fibers and expression of semaphorin 3A (Sema3A) and nerve growth factor (NGF) were examined by immunohistochemistry and quantitative RT-PCR. RESULTS:CTP enhanced hyaluronic acid production in human dermal fibroblasts in vitro and in murine skin in vivo. Oral administration of CTP in acetone-induced dry skin model mice significantly decreased TEWL and suppressed scratching behavior. Intraepidermal nerve growth was dramatically inhibited in CTP-treated mice. Quantitative PCR analysis and immunohistochemical study revealed that CTP abolished the increased NGF and decreased Sema3A levels induced by acetone treatment. CONCLUSION:Oral administration of CTP improves dry skin and normalizes axon-guidance factors in the epidermis in addition to reducing pruritus. CTP may be used in a new therapeutic strategy against dry skin and pruritus.

journal_name

J Dermatol Sci

journal_title

Journal of dermatological science

authors

Okawa T,Yamaguchi Y,Takada S,Sakai Y,Numata N,Nakamura F,Nagashima Y,Ikezawa Z,Aihara M

doi

10.1016/j.jdermsci.2012.02.004

subject

Has Abstract

pub_date

2012-05-01 00:00:00

pages

136-43

issue

2

eissn

0923-1811

issn

1873-569X

pii

S0923-1811(12)00053-9

journal_volume

66

pub_type

杂志文章

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