Open AccessCorrelation of hippocampal atrophy with hyperhomocysteinemia in hemodialysis patients: An exploratory pilot study
Author(s) -
Kyoko Maesato,
Takayasu Ohtake,
Yasuhiro Mochida,
Kunihiro Ishioka,
Machiko Oka,
Hideshige Moriya,
Sumi Hidaka,
Shuzo Kobayashi
Publication year - 2017
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0175102
Subject(s) - atrophy , medicine , hyperhomocysteinemia , hippocampal formation , magnetic resonance imaging , cardiology , pittsburgh compound b , pathology , homocysteine , alzheimer's disease , radiology , disease
Background Cognitive impairment is one of the important critical issues in hemodialysis (HD) patients. However, the associating factors of brain atrophy in HD patients have not been fully elucidated. Purpose and methods Brain magnetic resonance imaging (MRI) was performed in 34 of total 72 HD outpatients in our dialysis center. These MRI images were analyzed by an application software; Voxel-based Specific Regional Analysis System for Alzheimer’s Disease (VSRAD). VSRAD quantitatively calculates the extent of brain atrophy (percent of volume reduction) comparing with a MRI imaging database of 80 age-matched healthy controls. The extent of both hippocampal and whole-brain atrophy was evaluated with possible contributing factors. Results In all patients, the mean extent of hippocampal atrophy was 27.3%, and the mean extent of whole-brain atrophy was 11.2%. The extent of hippocampal atrophy was significantly correlated with low body mass index (BMI), total serum homocysteine (tHcy) levels, and brachial-ankle pulse wave velocity (baPWV). The extent of whole-brain atrophy showed significant correlations with age, hypoalbuminemia, and baPWV. Based on the multiple regression analysis, tHcy was an independent determinant of hippocampal atrophy (β = 0.460, R 2 = 0.189, P<0.01); while age was an independent determinant of whole-brain atrophy (β = 0.594, R 2 = 0.333, P<0.01). Conclusions In this exploratory pilot study, hippocampal atrophy was significantly correlated with hyperhomocysteinemia in HD patients.