PMID- 7865476 OWN - NLM STAT- MEDLINE DCOM- 19950330 LR - 20191023 IS - 0923-1811 (Print) IS - 0923-1811 (Linking) VI - 8 IP - 3 DP - 1994 Dec TI - Influence of alpha-melanocyte stimulating hormone on induction of contact hypersensitivity and tolerance. PG - 187-93 AB - Tumor necrosis factor-alpha (TNF-alpha) has been demonstrated to be the primary molecular mediator of impaired contact hypersensitivity induction after ultraviolet B radiation, but the mediator of ultraviolet B-induced tolerance remains obscure. Since alpha-melanocyte stimulating hormone (alpha-MSH) is generated within ultraviolet B-exposed skin, experiments were conducted to determine whether the cutaneous immune deficit caused by alpha-MSH is mediated by a TNF-alpha-dependent pathway, and/or whether alpha-MSH is responsible for UVB-induced tolerance. When dinitrofluorobenzene was painted on alpha-MSH-treated skin of ultraviolet B-susceptible and ultraviolet B-resistant strains of mice, only weak contact hypersensitivity was induced. However, neutralizing anti-TNF-alpha antibodies failed to restore contact hypersensitivity responsiveness to mice treated with alpha-MSH. Moreover, mice that first encountered hapten via alpha-MSH-treated skin failed to acquire tolerance; instead, these mice retained the ability to develop and display intense contact hypersensitivity when hapten was painted subsequently on normal (untreated) skin. We conclude that alpha-MSH can interfere with contact hypersensitivity induction, but cannot be considered a mediator of ultraviolet B-induced tolerance because skin treated with this neuropeptide does not support tolerance induction when hapten is applied epicutaneously. FAU - Shimizu, T AU - Shimizu T AD - Department of Dermatology, Hokkaido University School of Medicine, Sapporo, Japan. FAU - Streilein, J W AU - Streilein JW LA - eng GR - AI-22072/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - J Dermatol Sci JT - Journal of dermatological science JID - 9011485 RN - 0 (Antibodies) RN - 0 (Haptens) RN - 0 (Tumor Necrosis Factor-alpha) RN - 581-05-5 (alpha-MSH) RN - D241E059U6 (Dinitrofluorobenzene) SB - IM MH - Animals MH - Antibodies/immunology/pharmacology MH - Dermatitis, Contact/*etiology/*physiopathology MH - Dinitrofluorobenzene/pharmacology MH - Haptens/pharmacology MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Radiation Tolerance/*physiology MH - Skin/drug effects/radiation effects MH - Tumor Necrosis Factor-alpha/immunology/pharmacology/physiology MH - Ultraviolet Rays MH - alpha-MSH/metabolism/pharmacology/*physiology EDAT- 1994/12/01 00:00 MHDA- 1994/12/01 00:01 CRDT- 1994/12/01 00:00 PHST- 1994/12/01 00:00 [pubmed] PHST- 1994/12/01 00:01 [medline] PHST- 1994/12/01 00:00 [entrez] AID - 0923-1811(94)90053-1 [pii] AID - 10.1016/0923-1811(94)90053-1 [doi] PST - ppublish SO - J Dermatol Sci. 1994 Dec;8(3):187-93. doi: 10.1016/0923-1811(94)90053-1.