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Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions
07:30

Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions

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Asymmetric dimethylarginine is strongly associated with cognitive dysfunction and brain MR spectroscopic

Jasmohan S Bajaj1, Vishwadeep Ahluwalia, James B Wade

  • 1Division of Gastroenterology, Hepatology and Nutrition, Virginia Commonwealth University and McGuire VA Medical Center, Richmond, VA 23249, USA. jsbajaj@vcu.edu

Journal of Hepatology
|August 15, 2012
PubMed
Abstract

Insights

Asymmetric dimethylarginine (ADMA) is linked to cognitive decline and brain changes in cirrhosis, independent of disease severity. Higher ADMA levels correlate with worse cognition and predict hepatic encephalopathy development.

Area of Science:

  • Hepatology
  • Neuroscience
  • Biochemistry

Background:

  • Asymmetric dimethylarginine (ADMA), a nitric oxide synthase inhibitor, elevates in liver disease and may contribute to hepatic encephalopathy (HE).
  • Understanding ADMA's role in cirrhosis-related cognitive impairment is crucial for patient management.

Purpose of the Study:

  • To investigate the association between ADMA levels, cognitive function, and brain magnetic resonance spectroscopy (MRS) findings in patients with cirrhosis.
  • To determine if ADMA predicts cognitive decline and HE development in cirrhosis.

Main Methods:

  • Cognitive testing and ADMA measurements were performed in cirrhotic patients and controls.
  • Brain MRS assessed metabolites (Glx, mI, NAA) in specific brain regions.
  • Multivariable regression analyzed correlations between ADMA, cognition, MRS, and clinical factors (MELD score, prior HE).

Main Results:

  • Cirrhotic patients exhibited poorer cognition and altered metabolite levels (higher Glx, lower mI) compared to controls.
  • Patients with prior HE showed worse cognition, higher ADMA, and higher Glx than those without prior HE.
  • ADMA positively correlated with cognitive impairment and specific MRS markers, predicting cognitive decline independent of MELD score and prior HE.

Conclusions:

  • ADMA is strongly associated with cognitive impairment and prior HE in cirrhosis, independent of MELD score.
  • Elevated ADMA levels may serve as a biomarker for cognitive dysfunction and HE risk in cirrhotic patients.

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