胆固醇合成和酸路径之间的积极反,而不是糖解,促进肝细胞癌
Junjie Hu1, Ningning Liu2, David Song2,3
1School of Pharmacy, Hubei University of Chinese Medicine, Wuhan, PR China.
Oncogene
|August 18, 2023
概括
新发现的胆固醇合成和酸路径 (PPP) 之间的反循环驱动肝癌 (HCC). 微RNA-206阻断了这种循环,防止了小鼠的HCC发展.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 肝脏胆固醇积累和高胆固醇血症与肝细胞癌 (HCC) 有关.
- 胆固醇代谢在HCC病变发生过程中的确切作用仍然是复杂的和争论的.
- 针对降低胆固醇的现有疗法对HCC产生有争议的影响.
研究的目的:
- 研究胆固醇代谢,酸通路 (PPP) 和肝细胞癌 (HCC) 发展之间的复杂关系.
- 确定调节HCC中这种代谢相互作用的关键分子参与者.
- 探索针对HCC中这种途径的治疗潜力.
主要方法:
- 使用了一个c-Myc小鼠模型的HCC.
- 研究了所涉及的代谢途径,包括胆固醇合成,糖解和PPP.
- 采用分子生物学技术来识别microRNA目标并分析途径相互作用.
- 评估了酶抑制和微RNA调制对HCC进展的影响.
主要成果:
- 在HCC瘤中发现了胆固醇合成和PPP之间的关键正反循环,与糖解不同.
- 证明在c-Myc小鼠模型中,阻断PPP,而不是糖解,抑制胆固醇合成并防止HCC.
- 发现microRNA-206直接向HMGCR (3-hydroxy-3-methylglutaryl-CoA减少酶) 和G6PD (葡萄糖-6-酸盐脱酶),它们分别是胆固醇合成和PPP中的关键酶.
- 表明microRNA-206通过破坏这种反循环,有效地预防c-Myc小鼠中的HCC,而对照小鼠则屈服于疾病.
- 通过破坏其与目标酶的相互作用,恢复胆固醇合成和PPP活性来逆转microRNA-206对HCC的抑制作用.
结论:
- 胆固醇合成和PPP之间的新型正反循环是HCC的关键驱动因素.
- 微RNA-206通过破坏这种反循环,作为瘤抑制剂,为HCC提供了潜在的治疗策略.
- 胆固醇合成本身,而不是累积的胆固醇,被确定为HCC发展的主要贡献者.
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