The impact of kidney function on plasma neurofilament light and phospho-tau 181 in a community-based cohort: the Shanghai Aging Study

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Abstract

Background: The blood-based biomarkers are approaching the clinical practice of Alzheimer’s disease (AD). Chronic kidney disease (CKD) has a potential confounding effect on peripheral protein levels. It is essential to characterize the impact of renal function on AD markers. Methods: Plasma phospho-tau181 (P-tau181), and neurofilament light (NfL) were assayed via the Simoa HD-X platform in 1189 dementia-free participants from the Shanghai Aging Study (SAS). The estimated glomerular filter rate (eGFR) was calculated. The association between renal function and blood NfL, P-tau181 was analyzed. An analysis of interactions between various demographic and comorbid factors and eGFR was conducted. Results: The eGFR levels were negatively associated with plasma concentrations of NfL and P-tau181 (B = − 0.19, 95% CI − 0.224 to − 0.156, P < 0.001; B = − 0.009, 95% CI − 0.013 to -0.005, P < 0.001, respectively). After adjusting for demographic characteristics and comorbid diseases, eGFR remained significantly correlated with plasma NfL (B = − 0.010, 95% CI − 0.133 to − 0.068, P < 0.001), but not with P-tau181 (B = − 0.003, 95% CI − 0.007 to 0.001, P = 0.194). A significant interaction between age and eGFR was found for plasma NfL (Pinteraction < 0.001). In participants ≥ 70 years and with eGFR < 60 ml/min/1.73 m2, the correlation between eGFR and plasma NfL was significantly remarkable (B = − 0.790, 95% CI − 1.026 to − 0,554, P < 0.001). Conclusions: Considering renal function and age is crucial when interpreting AD biomarkers in the general aging population.

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APA

Wu, J., Xiao, Z., Wang, M., Wu, W., Ma, X., Liang, X., … Ding, D. (2024). The impact of kidney function on plasma neurofilament light and phospho-tau 181 in a community-based cohort: the Shanghai Aging Study. Alzheimer’s Research and Therapy, 16(1). https://doi.org/10.1186/s13195-024-01401-2

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