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Studying Chronic Exposure of Mice to Ultraviolet B Radiation
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皮膚のβ-エンドルフィンは,UV光への依存を媒介する
Gillian L Fell1, Kathleen C Robinson1, Jianren Mao2
1Cutaneous Biology Research Center, Department of Dermatology and MGH Cancer Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
Cell
|June 21, 2014
まとめ
紫外線曝露は,皮膚のベータエンドルフィン放出を引き起こし,中毒のような行動と離脱症状を生み出します. 依存症に関連したこの紫外線を求める行動は,皮膚がんのリスクを増やす可能性があります.
科学分野:
- 分子生物学は分子生物学である.
- 神経科学は神経科学である.
- 皮膚科 皮膚科について
背景:
- 紫外線 (UV) は,発癌性物質として知られています.
- 紫外線を求める行動には,中毒性の特徴があります.
- 皮膚細胞は紫外線にさらされた後にプロオピオメラノコルチン (POMC) ペプチドを産生し,それには日焼けに関わる細胞も含まれます.
研究 の 目的:
- 紫外線に誘発された行動におけるPOMC派生ペプチド,特にβ-エンドルフィンの役割を調査する.
- 紫外線中毒の可能性とその根本的なメカニズムを探求する.
主な方法:
- 歯類のモデルを使用して,UV照射による影響を研究しました.
- オピオイド受容体をブロックするために,薬理学的なオピオイドアンタゴニズムが使用されました.
- ベータ・エンドルフィン・ノックアウトマウスとPOMC誘導が低下したマウスを使用した.
- 離脱効果を評価するために,オペラントの行動選択が評価されました.
主要な成果:
- 低用量の紫外線曝露はベータエンドルフィンの皮膚合成を増加させ,歯類の血濃度と痛みの値を上昇させた.
- オピオイドアンタゴニズムは,慢性的なUV曝露後のUV誘発の痛み値上昇と誘発性離脱症状を逆転させた.
- ベータ・エンドルフィン・ノックアウトマウスと,p53-媒介のPOMC誘導を欠いたマウスでは,紫外線による効果は存在しなかった.
- 行動に関する研究では,オピオイド離脱を避けるための条件付きの場所嫌悪が示されました.
結論:
- 紫外線曝露は,皮膚由来ベータエンドルフィンの作用によって,依存症のような行動を誘発することができます.
- このメカニズムは,ビタミンDの合成のために進化した可能性があるが,現在では,皮膚がんの発生率の増加に寄与している可能性がある.
- 紫外線依存の経路を理解することは,紫外線曝露に関する公衆衛生戦略にとって極めて重要です.
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