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Renal function affects hippocampal volume and cognition: The role of vascular burden and amyloid deposition
Author(s) -
An Hoyoung,
Choi Booyeol,
Son Sang Joon,
Cho Eun Young,
Kim SeonOk,
Cho Sooyun,
Kang DukHee,
Lee Chul,
Kim Seong Yoon
Publication year - 2017
Publication title -
geriatrics and gerontology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.823
H-Index - 57
eISSN - 1447-0594
pISSN - 1444-1586
DOI - 10.1111/ggi.12985
Subject(s) - medicine , cognition , atrophy , dementia , renal function , hippocampal formation , amyloid (mycology) , cognitive decline , oncology , cardiology , pathology , disease , psychiatry
Aim We determined if differences in renal function, even within normal levels, influenced hippocampal volume (HCV) and cognition. Methods Cognitively normal (CN) and mild cognitive impairment (MCI) subjects with eGFR ≥ 60 ml/min/1.73m 2 were selected from the ADNI database ( N = 1,269) and divided into three groups (eGFR 60–75, 75–90 and ≥90). Associations between eGFR, HCV and cognition scores were examined using regression methods, and random‐coefficient models. The relationship between various factors, such as vascular burden and brain amyloid deposition, were investigated using path analysis. Results Higher eGFR was associated with larger HCVs and better cognition in all subjects at baseline. In MCI subjects, hippocampal atrophy in the eGFR ≥ 90 group progressed at just half the rate of the eGFR 75–90 group ( P = .006), and was also somewhat slower than the eGFR 60–75 group ( P = .08). A comprehensive path model linking eGFR, HCV and cognition, and integrating vascular burden and amyloid deposition, is proposed. Conclusions Higher renal function was associated with slower hippocampal atrophy and cognitive decline even within normal levels of renal function. This relationship was mediated mainly through cardiovascular risk burden and amyloid deposition. Further studies examining neuroinflammation are needed. Geriatr Gerontol Int 2017; 17: 1899–1906 .