Dyslipidemia links obesity to early cerebral neurochemical alterations

Andreana P. Haley, Mitzi M. Gonzales, Takashi Tarumi, Hirofumi Tanaka

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Objective To examine the role of hypertension, hyperglycemia, and dyslipidemia in potentially accounting for obesity-related brain vulnerability in the form of altered cerebral neurochemistry. Design and Methods Sixty-four adults, ages 40-60 years, underwent a health screen and proton magnetic resonance spectroscopy (1H MRS) of occipitoparietal gray matter to measure N-acetyl aspartate (NAA), choline (Cho), myo-inositol (mI), and glutamate (Glu) relative to creatine (Cr). The causal steps approach and nonparametric bootstrapping were utilized to assess if fasting glucose, mean arterial pressure or peripheral lipid/lipoprotein levels mediate the relationship between body mass index (BMI) and cerebral neurochemistry. Results Higher BMI was significantly related to higher mI/Cr, independent of age and sex. BMI was also significantly related to two of the proposed mediators, triglyceride, and HDL-cholesterol, which were also independently related to increased mI/Cr. Finally, the relationship between BMI and mI/Cr was significantly attenuated after inclusion of triglyceride and HDL-cholesterol into the model, one at a time, indicating statistical mediation. Conclusions Higher triglyceride and lower HDL levels statistically account for the association between BMI and myo-inositol, pointing toward a potentially critical role for dyslipidemia in the development of cerebral neurochemical alterations in obesity.

Original languageEnglish (US)
Pages (from-to)2007-2013
Number of pages7
JournalObesity
Volume21
Issue number10
DOIs
StatePublished - Oct 2013

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Nutrition and Dietetics

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