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项目题目
基于“乳酸代谢-NRF2乳酸化反馈回路”探究非酒精性脂肪肝的发病机制和治疗方法
立项依据
1. 研究的重要性
非酒精性脂肪肝疾病(NAFLD)已成为全球范围内最常见的慢性肝病,其进展可能导致肝纤维化、肝硬化,甚至肝癌。研究表明,NRF2在抗氧化应激、脂质代谢和炎症调控中起重要作用,且乳酸代谢与NRF2的反馈回路在NAFLD的病理机制中可能扮演关键角色。深入研究乳酸代谢与NRF2乳酸化反馈回路在NAFLD中的作用,不仅有助于揭示其发病机制,还可为精准治疗策略的开发提供新靶点。
2. 研究现状与不足
目前研究表明,NRF2可以通过调控抗氧化应激和脂质代谢缓解NAFLD。然而,关于乳酸代谢与NRF2之间的反馈机制及其对肝脏脂质代谢的调控机制仍不明确,尤其是乳酸在NRF2活化中的潜在作用尚未得到系统研究。因此,探索乳酸代谢与NRF2在NAFLD中的反馈机制将填补该领域的重要空白。
3. 研究的难点与创新点
该研究的难点在于:①如何在NAFLD模型中精准解析乳酸代谢与NRF2之间的相互作用;②如何识别和验证乳酸代谢对NRF2的反馈作用。创新点在于提出“乳酸代谢-NRF2乳酸化反馈回路”假说,并通过多种细胞和小鼠模型验证该回路在NAFLD发病和发展中的具体作用。
拟解决的科学问题
本研究拟回答的核心科学问题是:乳酸代谢与NRF2之间的反馈回路如何在非酒精性脂肪肝的发病机制中发挥作用?是否可以通过调控该反馈回路有效缓解NAFLD?
科学假说
基于前期研究,我们提出假说:乳酸代谢能够通过NRF2乳酸化反馈回路影响NAFLD中的脂质代谢和氧化应激,从而在病程进展中起关键调控作用。若该假说成立,将揭示NAFLD治疗中的新靶点,为开发基于乳酸代谢和NRF2的干预策略提供理论基础。
参考文献
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Arroyave-Ospina, J. C., Wu, Z., Geng, Y., & Moshage, H. Role of Oxidative Stress in the Pathogenesis of Non-Alcoholic Fatty Liver Disease: Implications for Prevention and Therapy. Antioxidants, 2021, 10. 链接
Deng, X., Ke, X., Tang, Y., et al. Sagittaria sagittifolia polysaccharide interferes with arachidonic acid metabolism in non-alcoholic fatty liver disease mice via Nrf2/HO-1 signaling pathway. Biomedicine & Pharmacotherapy, 2020, 132, 110806. 链接
Wang, J., Jiang, W., Xin, J., et al. Caveolin-1 Alleviates Acetaminophen-Induced Fat Accumulation in Non-Alcoholic Fatty Liver Disease by Enhancing Hepatic Antioxidant Ability via Activating AMPK Pathway. Frontiers in Pharmacology, 2021, 12. 链接
Zhong, C. C., Zhao, T., Hogstrand, C., et al. Copper (Cu) induced changes of lipid metabolism through oxidative stress-mediated autophagy and Nrf2/PPARγ pathways. The Journal of Nutritional Biochemistry, 2021. 链接
Qiu, S., Liang, Z., Wu, Q., et al. Hepatic lipid accumulation induced by a high‐fat diet is regulated by Nrf2 through multiple pathways. Research Square Preprint, 2021. 链接
Sharma, A., Anand, S., Singh, N., et al. Berbamine induced AMPK activation regulates mTOR/SREBP-1c axis and Nrf2/ARE pathway to allay lipid accumulation and oxidative stress in steatotic HepG2 cells. European Journal of Pharmacology, 2020, 173244. 链接
Chen, J., Chen, J., Fu, H., et al. Hypoxia exacerbates non-alcoholic fatty liver disease via HIF-2α/PPARα pathway. American Journal of Physiology. Endocrinology and Metabolism, 2019. 链接
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