AIMS: To investigate the frequency of clonal hematopoiesis of indeterminate potential (CHIP) and evaluate its impacts on outcomes in patients with acute coronary syndrome (ACS) undergoing percutaneous coronary intervention (PCI) in the absence of traditional cardiovascular risk factors (CVRFs). METHODS: Whole-exome sequencing was performed to detect the presence of CHIP in 183 patients underwent PCI for the treatment of ACS. The association between CHIP-related mutations and major adverse cardiac or cerebral events (MACCEs, a composite of all-cause mortality, coronary revascularization, myocardial infarction, or stroke) was analyzed in such cohort. RESULTS: Of 179 patients [median age, 65 years; 84 female (46.9%)] included in this analysis, CHIP-related mutations were detected in 36 (20.1%) patients. The somatic mutations most frequently occurred in the genes DNMT3A (17 mutations), TET2 (6 mutations), and ASXL1 (4 mutations). Clinical outcomes at median 635 follow-up days showed that DNMT3A/TET2/ASXL1-CHIP mutations were associated with significantly higher risk of MACCEs, compared with non-CHIP carriers in the CVRFs-absent ACS cohort (26.1% vs. 4.2%, log-rank P = 0.001). Multivariable regression showed that DNMT3A/TET2/ASXL1-CHIP driver mutations (HR 4.015; 95% CI 1.236-13.046; P = 0.021) were independent predictors of adverse clinical outcomes. CONCLUSION: The most frequent CHIP-related mutations, DNMT3A, TET2, and ASXL1 are significantly associated with increased risk of recurrent cardiovascular events. Our study may be valuable target to reduce residual risk in patients with ACS carrying specific mutations.
AIMS: To investigate the frequency of clonal hematopoiesis of indeterminate potential (CHIP) and evaluate its impacts on outcomes in patients with acute coronary syndrome (ACS) undergoing percutaneous coronary intervention (PCI) in the absence of traditional cardiovascular risk factors (CVRFs). METHODS: Whole-exome sequencing was performed to detect the presence of CHIP in 183 patients underwent PCI for the treatment of ACS. The association between CHIP-related mutations and major adverse cardiac or cerebral events (MACCEs, a composite of all-cause mortality, coronary revascularization, myocardial infarction, or stroke) was analyzed in such cohort. RESULTS: Of 179 patients [median age, 65 years; 84 female (46.9%)] included in this analysis, CHIP-related mutations were detected in 36 (20.1%) patients. The somatic mutations most frequently occurred in the genes DNMT3A (17 mutations), TET2 (6 mutations), and ASXL1 (4 mutations). Clinical outcomes at median 635 follow-up days showed that DNMT3A/TET2/ASXL1-CHIP mutations were associated with significantly higher risk of MACCEs, compared with non-CHIP carriers in the CVRFs-absent ACS cohort (26.1% vs. 4.2%, log-rank P = 0.001). Multivariable regression showed that DNMT3A/TET2/ASXL1-CHIP driver mutations (HR 4.015; 95% CI 1.236-13.046; P = 0.021) were independent predictors of adverse clinical outcomes. CONCLUSION: The most frequent CHIP-related mutations, DNMT3A, TET2, and ASXL1 are significantly associated with increased risk of recurrent cardiovascular events. Our study may be valuable target to reduce residual risk in patients with ACS carrying specific mutations.
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