Serum Fractalkine (CX3CL1) and Cardiovascular Outcomes and Diabetes: Findings From the Chronic Renal Insufficiency Cohort (CRIC) Study Journal Article

Authors: Shah, R; Matthews, G. J.; Shah, R. Y.; McLaughlin, C.; Chen, J; Wolman, M.; Master, S. R.; Chai, B; Xie, D; Rader, D. J.; Raj, D. S.; Mehta, N. N.; Budoff, M.; Fischer, M. J.; Go, A. S.; Townsend, R. R.; He, J; Kusek, J. W.; Feldman, H. I.; Foulkes, A. S.; Reilly, M. P.; CRIC Study Investigators
Article Title: Serum Fractalkine (CX3CL1) and Cardiovascular Outcomes and Diabetes: Findings From the Chronic Renal Insufficiency Cohort (CRIC) Study
Abstract: BACKGROUND: Cardiometabolic disease is a major cause of morbidity and mortality in persons with chronic kidney disease (CKD). Fractalkine (CX3CL1) is a potential mediator of both atherosclerosis and metabolic disease. Studies of the relationship of CX3CL1 with risk of cardiovascular disease (CVD) events and metabolic traits are lacking, particularly in the high-risk setting of CKD. STUDY DESIGN: Cross-sectional and longitudinal observational analysis. SETTING PARTICIPANTS: Adults with CKD from 7 US sites participating in the Chronic Renal Insufficiency Cohort (CRIC) Study. PREDICTOR: Quartiles of plasma CX3CL1 levels at baseline. OUTCOMES: Baseline estimated glomerular filtration rate from a creatinine and cystatin C-based equation, prevalent and incident CVD, diabetes, metabolic syndrome and its criteria, homeostatic model assessment of insulin resistance, hemoglobin A1c level, myocardial infarction, all-cause mortality, and the composite outcome of myocardial infarction/all-cause mortality. RESULTS: Among 3,687 participants, baseline CX3CL1 levels were associated positively with several CVD risk factors and metabolic traits, lower estimated glomerular filtration rate, and higher levels of inflammatory cytokines, as well as prevalent CVD (OR, 1.09; 95% CI, 1.01-1.19; P=0.03). Higher CX3CL1 level also was associated with prevalent diabetes (OR, 1.26; 95% CI, 1.16-1.38; P0.001) in adjusted models. During a mean follow-up of 6 years, there were 352 deaths, 176 myocardial infarctions, and 484 composite outcomes. In fully adjusted models, 1-SD higher CX3CL1 level increased the hazard for all-cause mortality (1.11; 95% CI, 1.00-1.22; P=0.02) and the composite outcome (1.09; 95% CI, 1.00-1.19; P=0.04). LIMITATIONS: Study design did not allow evaluation of changes over time, correlation with progression of phenotypes, or determination of causality of effect. CONCLUSIONS: Circulating CX3CL1 level may contribute to both atherosclerotic CVD and diabetes in a CKD cohort. Further studies are required to establish mechanisms through which CX3CL1 affects the pathogenesis of atherosclerosis and diabetes.
Keywords: Metabolic syndrome; diabetes; atherosclerosis; cardiovascular disease (CVD); chronic kidney disease (CKD); Cardiometabolic disease; Chronic Renal Insufficiency Cohort; fractalkine (CX3CL1)
Journal Title: American Journal of Kidney Diseases : The Official Journal of the National Kidney Foundation
Volume: 66
Issue: 2
ISSN: 1523-6838; 0272-6386
Publisher: National Kidney Foundation, Inc  
Date Published: 2015
Start Page: 266
End Page: 273
Language: ENG
Notes: LR: 20150325; CI: Copyright (c) 2015; GR: K24 DK002651/DK/NIDDK NIH HHS/United States; GR: K24 HL107643/HL/NHLBI NIH HHS/United States; GR: R01 DK071224/DK/NIDDK NIH HHS/United States; GR: R01 DK090505/DK/NIDDK NIH HHS/United States; GR: R01 HL107196/HL/NHLBI NIH HHS/United States; GR: R01 HL113147/HL/NHLBI NIH HHS/United States; GR: U01 DK060902/DK/NIDDK NIH HHS/United States; GR: U01 DK061028/DK/NIDDK NIH HHS/United States; GR: U01 HL108636/HL/NHLBI NIH HHS/United States; JID: 8110075; OTO: NOTNLM; 2014/07/07 [received]; 2015/01/25 [accepted]; aheadofprint