Neurometabolite Alterations Associated With Cognitive Performance in Perinatally HIV-Infected Children

Medicine (Baltimore). 2016 Mar;95(12):e3093. doi: 10.1097/MD.0000000000003093.

Abstract

Despite treatment with combination antiretroviral therapy (cART), cognitive impairment is still observed in perinatally HIV-infected children. We aimed to evaluate potential underlying cerebral injury by comparing neurometabolite levels between perinatally HIV-infected children and healthy controls. This cross-sectional study evaluated neurometabolites, as measured by Magnetic Resonance Spectroscopy (MRS), in perinatally HIV-infected children stable on cART (n = 26) and healthy controls (n = 36).Participants were included from a cohort of perinatally HIV-infected children and healthy controls, matched group-wise for age, gender, ethnicity, and socio-economic status. N-acetylaspartate (NAA), glutamate (Glu), myo-inositol (mI), and choline (Cho) levels were studied as ratios over creatine (Cre). Group differences and associations with HIV-related parameters, cognitive functioning, and neuronal damage markers (neurofilament and total Tau proteins) were determined using age-adjusted linear regression analyses.HIV-infected children had increased Cho:Cre in white matter (HIV-infected = 0.29 ± 0.03; controls = 0.27 ± 0.03; P value = 0.045). Lower nadir CD4+ T-cell Z-scores were associated with reduced neuronal integrity markers NAA:Cre and Glu:Cre. A Centers for Disease Control and Prevention (CDC) stage C diagnosis was associated with higher glial markers Cho:Cre and mI:Cre. Poorer cognitive performance was mainly associated with higher Cho:Cre in HIV-infected children, and with lower NAA:Cre and Glu:Cre in healthy controls. There were no associations between neurometabolites and neuronal damage markers in blood or CSF.Compared to controls, perinatally HIV-infected children had increased Cho:Cre in white matter, suggestive of ongoing glial proliferation. Levels of several neurometabolites were associated with cognitive performance, suggesting that MRS may be a useful method to assess cerebral changes potentially linked to cognitive outcomes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • AIDS Dementia Complex / diagnosis*
  • Adolescent
  • Aspartic Acid / analogs & derivatives*
  • Aspartic Acid / metabolism
  • Brain / metabolism*
  • CD4 Lymphocyte Count
  • Child
  • Choline / metabolism*
  • Cognition Disorders / diagnosis*
  • Cohort Studies
  • Creatine / metabolism*
  • Cross-Sectional Studies
  • Female
  • Glutamic Acid / metabolism*
  • HIV Infections / congenital*
  • HIV Infections / diagnosis
  • HIV Infections / transmission*
  • Humans
  • Infectious Disease Transmission, Vertical*
  • Inositol / metabolism*
  • Magnetic Resonance Spectroscopy*
  • Male
  • Neurofilament Proteins / metabolism
  • Neuropsychological Tests
  • Reference Values
  • tau Proteins / metabolism

Substances

  • MAPT protein, human
  • Neurofilament Proteins
  • tau Proteins
  • Aspartic Acid
  • Glutamic Acid
  • Inositol
  • N-acetylaspartate
  • Creatine
  • Choline