Systematic druggable genome-wide Mendelian randomization identifies therapeutic targets for sarcopenia

Kang-Fu Yin; Ting Chen; Xiao-Jing Gu; Wei-Ming Su; Zheng Jiang; Si-Jia Lu; Bei Cao; Li-Yi Chi; Xia Gao; Yong-Ping Chen

doi:10.1002/jcsm.13479

Systematic druggable genome-wide Mendelian randomization identifies therapeutic targets for sarcopenia

J Cachexia Sarcopenia Muscle. 2024 Apr 21. doi: 10.1002/jcsm.13479. Online ahead of print.

Authors

Kang-Fu Yin^{1

2}, Ting Chen^{1

2}, Xiao-Jing Gu³, Wei-Ming Su^{1

2}, Zheng Jiang^{1

2}, Si-Jia Lu⁴, Bei Cao^{1

2}, Li-Yi Chi⁵, Xia Gao⁶, Yong-Ping Chen^{1

2}

Affiliations

¹ Department of Neurology, West China Hospital, Sichuan University, Chengdu, China.
² Institute of Brain Science and Brain-Inspired Technology, West China Hospital, Sichuan University, Chengdu, China.
³ Mental Health Center, West China Hospital, Sichuan University, Chengdu, China.
⁴ Department of Respiratory, The Fourth People's Hospital of Chengdu, Mental Health Center of Chengdu, Chengdu, China.
⁵ Department of Neurology, First Affiliated Hospital of Air Force Military Medical University, Xi'an, China.
⁶ Department of Geriatrics, Dazhou Central Hospital, Dazhou, China.

PMID: 38644354
DOI: 10.1002/jcsm.13479

Abstract

Background: There are no effective pharmacological treatments for sarcopenia. We aim to identify potential therapeutic targets for sarcopenia by integrating various publicly available datasets.

Methods: We integrated druggable genome data, cis-eQTL/cis-pQTL from human blood and skeletal muscle tissue, and GWAS summary data of sarcopenia-related traits to analyse the potential causal relationships between drug target genes and sarcopenia using the Mendelian Randomization (MR) method. Sensitivity analyses and Bayesian colocalization were employed to validate the causal relationships. We also assessed the side effects or additional indications of the identified drug targets using a phenome-wide MR (Phe-MR) approach and investigated actionable drugs for target genes using available databases.

Results: MR analysis identified 17 druggable genes with potential causation to sarcopenia in human blood or skeletal muscle tissue. Six of them (HP, HLA-DRA, MAP 3K3, MFGE8, COL15A1, and AURKA) were further confirmed by Bayesian colocalization (PPH4 > 90%). The up-regulation of HP [higher ALM (beta: 0.012, 95% CI: 0.007-0.018, P = 1.2*10^-5) and higher grip strength (OR: 0.96, 95% CI: 0.94-0.98, P = 4.2*10^-5)], MAP 3K3 [higher ALM (beta: 0.24, 95% CI: 0.21-0.26, P = 1.8*10^-94), higher grip strength (OR: 0.82, 95% CI: 0.75-0.90, P = 2.1*10^-5), and faster walking pace (beta: 0.03, 95% CI: 0.02-0.05, P = 8.5*10^-6)], and MFGE8 [higher ALM (muscle eQTL, beta: 0.09, 95% CI: 0.06-0.11, P = 6.1*10^-13; blood pQTL, beta: 0.05, 95% CI: 0.03-0.07, P = 3.8*10^-09)], as well as the down-regulation of HLA-DRA [lower ALM (beta: -0.09, 95% CI: -0.11 to -0.08, P = 5.4*10^-36) and lower grip strength (OR: 1.13, 95% CI: 1.07-1.20, P = 1.8*10^-5)] and COL15A1 [higher ALM (muscle eQTL, beta: -0.07, 95% CI: -0.10 to -0.04, P = 3.4*10^-07; blood pQTL, beta: -0.05, 95% CI: -0.06 to -0.03, P = 1.6*10^-07)], decreased the risk of sarcopenia. AURKA in blood (beta: -0.16, 95% CI: -0.22 to -0.09, P = 2.1*10^-06) and skeletal muscle (beta: 0.03, 95% CI: 0.02 to 0.05, P = 5.3*10^-05) tissues showed an inverse relationship with sarcopenia risk. The Phe-MR indicated that the six potential therapeutic targets for sarcopenia had no significant adverse effects. Drug repurposing analysis supported zinc supplementation and collagenase clostridium histolyticum might be potential therapeutics for sarcopenia by activating HP and inhibiting COL15A1, respectively.

Conclusions: Our research indicated MAP 3K3, MFGE8, COL15A1, HP, and HLA-DRA may serve as promising targets for sarcopenia, while the effectiveness of zinc supplementation and collagenase clostridium histolyticum for sarcopenia requires further validation.

Keywords: Colocalization; Druggable genes; Mendelian randomization; Sarcopenia.

Abstract

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