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. 2022 Sep;92(3):390-399.
doi: 10.1002/ana.26426. Epub 2022 Jun 24.

Lipids, Apolipoproteins, Statins, and Intracerebral Hemorrhage: A Mendelian Randomization Study

Zhou Yu #  1 , Linjing Zhang #  1 , Gan Zhang  1 , Kailin Xia  1 , Qiong Yang  1 , Tao Huang  2   3   4 , Dongsheng Fan  1   5   6
Affiliations

Lipids, Apolipoproteins, Statins, and Intracerebral Hemorrhage: A Mendelian Randomization Study

Zhou Yu et al. Ann Neurol. 2022 Sep.

Abstract

Objective: To investigate the causal role of lipid or apolipoprotein traits in intracerebral hemorrhage (ICH) and determine the effect of lipid-lowering interventions on the disease.

Methods: Two-sample Mendelian randomization (MR) analyses were conducted to evaluate the associations of high-density lipoprotein cholesterol, low-density lipoprotein cholesterol (LDL-C), triglycerides (TG), apolipoprotein (Apo)B and ApoA1 levels with risks for ICH, and those of LDL-C- (HMGCR, PCSK9, and NPC1L1) and TG-lowering targets (LPL and APOC3) with ICH.

Results: Increased levels of ApoB was associated with a decreased risk of overall ICH (OR 0.623, 95% CI 0.413-0.940; p = 0.024) and lobar ICH (OR 0.579, 95% CI 0.342-0.979; p = 0.042). The inverse relationship remained stable in multivariable MR. In addition, elevated TGs showed a causal effect on lobar ICH in multivariable MR (OR 1.600, 95% CI 1.009-2.537; p = 0.046). The LDL-C-reducing genetic variation alleles at or near the HMGCR gene (mimicking the effect of statins) were predicted to increase the overall and deep ICH risk. Additionally, genetic variation at or near the APOC3 gene suggested that genetically reducing the activity of APOC3 (mimicking antisense anti-apoC3 agents) was predicted to decrease lobar ICH.

Interpretation: Genetically predicted elevated ApoB may have a protective effect on overall ICH and lobar ICH, whereas elevated TG was associated with a higher risk of lobar ICH conditional on LDL-C and ApoB. MR analysis supports the conclusion that statins may increase the risk of overall and deep ICH independent of their lipid-lowering effect. More specific lipid-lowering targets may end up being the future. ANN NEUROL 2022;92:390-399.

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