Arginine and asymmetric dimethylarginine in pregnant women with major depression

Psychosom Med. Jul-Aug 2014;76(6):430-6. doi: 10.1097/PSY.0000000000000077.

Abstract

Objective: Depression has been associated with vascular dysfunction, which may be of particular relevance in pregnancy. Asymmetric dimethylarginine (ADMA), symmetric dimethylarginine (SDMA), and L-arginine play a critical role in vascular function. The objective of this study was to investigate differences in ADMA, SDMA, and L-arginine among pregnant women with major depression compared with pregnant women without depression.

Methods: A case-control study was conducted in 21 depressed pregnant women and 42 matched controls. Maternal plasma ADMA, SDMA, and L-arginine were quantified, as well as C-reactive protein and urine excretion of ADMA, SDMA, L-arginine, and Arginase I.

Results: Plasma L-arginine and ADMA levels were significantly lower in the first trimester in women with depression (mean [standard deviation = 37.0 [9.2] and 0.298 [0.06] μM, respectively) compared with matched controls (42.1 [11.4] and 0.336 [0.08] μM, p = .004 and p = .002, respectively) and across pregnancies (p < .001 both). Depressed pregnant women had higher levels of plasma C-reactive protein (7.5 [3.7] versus 5.1 [4.0] μg/ml, p = .027), but no differences in urine excretion of ADMA, SDMA, or L-arginine, or plasma levels of Arginase I (p > .10).

Conclusions: Pregnant women with depression show lower plasma levels of L-arginine and ADMA. These differences are not explained by urinary excretion or Arginase I levels. The mechanism responsible for the observed differences in depressed pregnant women requires further research.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Adult
  • Arginase / urine
  • Arginine / analogs & derivatives
  • Arginine / analysis
  • Arginine / blood*
  • Arginine / urine
  • Case-Control Studies
  • Depressive Disorder, Major / blood*
  • Depressive Disorder, Major / urine
  • Female
  • Humans
  • Pregnancy
  • Pregnancy Complications / blood*
  • Pregnancy Complications / urine
  • Young Adult

Substances

  • N,N-dimethylarginine
  • Arginine
  • Arginase