{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,23]],"date-time":"2026-07-23T19:30:49Z","timestamp":1784835049120,"version":"3.55.0"},"reference-count":56,"publisher":"PeerJ","license":[{"start":{"date-parts":[[2024,11,18]],"date-time":"2024-11-18T00:00:00Z","timestamp":1731888000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:sec>\n<jats:title>Background<\/jats:title>\n<jats:p>C1q tumor necrosis factor (TNF) related proteins 9 (CTRP9) is a novel adipocytokine that has been shown to have a cardioprotective effect in coronary artery disease (CAD). However, there are conflicting results on circulating levels of CTRP9 in patients with and without CAD. This meta-analysis was conducted to investigate the association between circulating CTRP9 levels and CAD.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Objective<\/jats:title>\n<jats:p>The aim of this meta-analysis was to re-examine the relationship between circulating CTRP9 levels and CAD.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Methods<\/jats:title>\n<jats:p>We searched PubMed, Web of Science, Embase, Cochrane Library, CNKI, VIP, Wanfang Data, and CBM for relevant studies up to October 2023, and 193 articles were identified. After reading the title, abstract and full text, a total of 25 articles were included in this meta-analysis. A prespecified protocol registered at INPLASY was followed (INPLASY202450066). Due to the high heterogeneity, we performed subgroup analyses and meta-regression based on patient characteristics, complications, clinical biochemical indicators, coronary artery lesion, and CAD classification. Publication bias was assessed using Egger\u2019s linear regression tests, Begg\u2019s rank correlation tests, and funnel plots.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Results<\/jats:title>\n<jats:p>The results showed that the patient with CAD had significantly lower circulating CTRP9 levels than the control group (Z = 3.26, <jats:italic>P<\/jats:italic> = 0.001). Subgroup analysis and meta-regression findings demonstrated that observed heterogeneity could be attributed to population distribution. Patient characteristics (year of publication, patients\u2019 age, and BMI), complications (diabetes and type 2 diabetes mellitus (T2DM)), clinical biochemical indicators, coronary artery lesion (stability of coronary atherosclerotic plaque, and the number of diseased coronary vessels), and classification of CAD were not identified as source of heterogeneity.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>Conclusions<\/jats:title>\n<jats:p>The meta-analysis confirmed that circulating CTRP9 levels in CAD patients are significantly lower than those in patients without CAD. The association may be modified by the population distribution.<\/jats:p>\n<\/jats:sec>","DOI":"10.7717\/peerj.18488","type":"journal-article","created":{"date-parts":[[2024,11,18]],"date-time":"2024-11-18T07:21:39Z","timestamp":1731914499000},"page":"e18488","source":"Crossref","is-referenced-by-count":4,"title":["Association between circulating CTRP9 levels and coronary artery disease: a systematic review and meta-analysis"],"prefix":"10.7717","volume":"12","author":[{"given":"Ziyi","family":"Zhu","sequence":"first","affiliation":[{"name":"West China School of Medicine, Sichuan University, Chengdu, Sichuan, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qingsheng","family":"Niu","sequence":"additional","affiliation":[{"name":"West China School of Medicine, Sichuan University, Chengdu, Sichuan, China"},{"name":"Department of Emergency Medicine, West China School of Medicine, Sichuan University, Chengdu, Sichuan, China"},{"name":"Laboratory of Emergency Medicine, Disaster Medical Center, West China Hospital of Sichuan University, Chengdu, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shiyuan","family":"Tang","sequence":"additional","affiliation":[{"name":"Department of Emergency Medicine, West China School of Medicine, Sichuan University, Chengdu, Sichuan, China"},{"name":"Laboratory of Emergency Medicine, Disaster Medical Center, West China Hospital of Sichuan University, Chengdu, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaowen","family":"Jiang","sequence":"additional","affiliation":[{"name":"Department of Emergency Medicine, West China School of Medicine, Sichuan University, Chengdu, Sichuan, China"},{"name":"Laboratory of Emergency Medicine, Disaster Medical Center, West China Hospital of Sichuan University, Chengdu, 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