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Soluble CD14 is associated with the structural failure of bioprostheses.
INTRODUCTION: Aortic valve bioprostheses, which do not mandate chronic anticoagulation, are prone to structural valve degeneration (SVD). The processes involved in SVD are likely multifactorial. We hypothesized that inflammation and macrophage activation could be involved in SVD.
METHODS: In 203 patients with an aortic valve bioprosthesis, we evaluated the association between the macrophage activation marker soluble CD14 (sCD14) and SVD.
RESULTS: After a mean follow-up of 8 ± 3 years, 42 (21%) patients developed SVD. Patients with SVD had higher peak (44 ± 13 mmHg vs. 25 ± 12 mmHg, p < .0001) and mean (24 ± 7 mmHg vs. 12 ± 5 mmHg, p < .0001) transprosthetic gradients. On univariable analysis, low-density lipoprotein cholesterol (LDL) and sCD14 were associated with SVD. After correction for covariates, sCD14 (OR: 1.12, 95%CI: 1.02-1.23, p = .01) remained independently associated with SVD. In turn, sCD14 was associated with the HOMA index and high-density lipoprotein (HDL) level. Patients with a metabolic syndrome (MetS) had higher level of sCD14. In a model corrected for age, sex, HOMA and HDL, the MetS remained independently associated with sCD14 levels (β = 0.65, SE = 0.30, p = .03).
CONCLUSION: Circulating level of sCD14 is an independent predictor of SVD. In turn, patients with MetS have higher sCD14 levels.
METHODS: In 203 patients with an aortic valve bioprosthesis, we evaluated the association between the macrophage activation marker soluble CD14 (sCD14) and SVD.
RESULTS: After a mean follow-up of 8 ± 3 years, 42 (21%) patients developed SVD. Patients with SVD had higher peak (44 ± 13 mmHg vs. 25 ± 12 mmHg, p < .0001) and mean (24 ± 7 mmHg vs. 12 ± 5 mmHg, p < .0001) transprosthetic gradients. On univariable analysis, low-density lipoprotein cholesterol (LDL) and sCD14 were associated with SVD. After correction for covariates, sCD14 (OR: 1.12, 95%CI: 1.02-1.23, p = .01) remained independently associated with SVD. In turn, sCD14 was associated with the HOMA index and high-density lipoprotein (HDL) level. Patients with a metabolic syndrome (MetS) had higher level of sCD14. In a model corrected for age, sex, HOMA and HDL, the MetS remained independently associated with sCD14 levels (β = 0.65, SE = 0.30, p = .03).
CONCLUSION: Circulating level of sCD14 is an independent predictor of SVD. In turn, patients with MetS have higher sCD14 levels.
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