PPARγ 抗剂诱导脂肪组织培养中的芳酶转录
Jacob Ardenkjær-Skinnerup1, Daniel Saar2, Patricia S S Petersen3
1The National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark; The National Research Centre for the Working Environment, Copenhagen Ø, Denmark.
Biochemical pharmacology
|February 29, 2024
概括
作为PPARγ抗剂的环境化学物质可以通过增加脂肪组织中的芳酶表达来促进乳腺癌,影响脂肪生成和直接上调芳酶.
科学领域:
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
- 环境健康 环境健康
背景情况:
- 芳酶对雌激素生物合成至关重要,也是激素受体阳性乳腺癌的危险因素.
- 在脂肪组织中合成的雌激素在绝经后妇女中促进乳腺癌的生长.
- 在脂肪 stromal 细胞 (ASCs) 中,酶增殖器激活受体马 (PPARγ) 的激活减少了芳酶,并促进了脂肪细胞的分化.
研究的目的:
- 调查PPARγ抗剂是否通过刺激人类脂肪组织中的芳香酶表达来促进乳腺癌.
- 阐明PPARγ抗剂影响脂肪生成和芳酶表达的机制.
- 评估环境PPARγ抗剂对雌激素生物合成的影响.
主要方法:
- 使用了人类脂肪组织的原始细胞和扩展物,以及细胞系 (A41hWAT,C3H10T1/2,H295R).
- 对脂肪生成,芳酶表达和雌激素生物合成的评估影响.
- 采用核磁共振 (NMR) 光谱来确认分子相互作用.
主要成果:
- PPARγ 抗剂抑制了脂肪细胞的分化,防止了芳酶的下调.
- 作为一种强大的抗体,DEHPA与PPARγ直接相互作用,阻断了对抗体的结合.
- 暴露于抗剂的ASC显示出调节的芳酶,特别是在分化细胞和人类脂肪组织扩展物中.
- 过度表达PPARG降低了芳香酶的表达.
结论:
- 环境PPARγ抗剂可以通过脂肪组织的芳酶上调促进乳腺癌.
- 这涉及两个机制:间接抑制脂肪生成和急性直接调节芳酶.
- 研究结果强调了环境化学物质在内分泌干扰和乳腺癌进展中的作用.
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