The percentage of circulating fibrocytes is associated with increased morbidity of pulmonary hypertension in patients on hemodialysis

SEMINARS IN DIALYSIS(2024)

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摘要
Introduction: Pulmonary hypertension (PH) is highly prevalent in patients receiving dialysis. The precise mechanisms underlying PH in hemodialysis (HD) patients have not been adequately addressed. Emerging experimental evidence indicates that circulating fibrocytes may contribute significantly to this process. Methods: We measured the proportion of circulating fibrocytes using flow cytometry analysis and prospectively analyzed patients during HD from February 1, 2017, to February 1, 2022. Then we investigated correlations between circulating fibrocytes, inflammation cytokines, PH, and their affective factors that predict the prognosis of HD patients. Results: The cohort included 192 patients. During a follow-up of 5 years, we registered 66 all-cause deaths, and 11 patients received kidney transplantation. The incidence of PH among HD patients was 30.9%. We found that the circulating fibrocyte level significantly correlated with pulmonary arterial systolic pressure (r = 0.412, p < 0.05). In the multiple logistic regression analysis, the percentage of circulating fibrocytes was an independent predictor of PH (odds ratio [OR]: 2.080, 95% confidence interval [CI]: 1.539-2.812, p < 0.001). Controlling for confounding covariates in the multivariate Cox regression models, the presence of PH conferred an increased risk of all-cause mortality in HD patients [hazard ratio (HR): 2.183, 95% CI:1.257-3.788, p = 0.006]. Conclusion: The prevalence of PH was high in HD patients and was associated with higher all-cause mortality. Higher circulating fibrocyte level was an independent predictor of the presence of PH; these fibrocytes may serve as early detection markers and novel therapeutic targets.
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