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Decreased cerebral blood flow velocity in apolipoprotein E epsilon4 allele carriers with mild cognitive impairment

Z-W Sun1, Y-X Zhu, H-Y Liu

  • 1Department of Neurology, Anhui Geriatric Institute, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.

European Journal of Neurology
|January 26, 2007
PubMed

Insights

Mild cognitive impairment (MCI) is linked to reduced cerebral blood flow velocity (CBFV). Apolipoprotein E (apoE) epsilon4 carriers with MCI exhibit even lower CBFV, suggesting potential for early Alzheimer's disease detection.

Area of Science:

  • Neurology
  • Neuroscience
  • Medical Imaging

Background:

  • Mild cognitive impairment (MCI) represents a transitional stage between normal aging and dementia.
  • Cerebral blood flow velocity (CBFV) is a crucial indicator of brain perfusion and vascular health.
  • The apolipoprotein E (apoE) epsilon4 allele is a known genetic risk factor for Alzheimer's disease.

Purpose of the Study:

  • To investigate alterations in CBFV in individuals with MCI.
  • To examine the association between the apoE epsilon4 allele and CBFV in MCI patients.
  • To explore the potential of CBFV as a biomarker for early detection of cognitive decline.

Main Methods:

  • Transcranial Doppler ultrasonography was used to measure CBFV in the anterior (ACA), middle (MCA), and basilar (BA) cerebral arteries.
  • Participants included 30 individuals with MCI and 30 healthy controls.
  • Cognitive function was assessed using the Mini-Mental State Examination (MMSE) and Cambridge Cognitive Examination-Chinese version (CAMCOG-C).

Main Results:

  • MCI patients demonstrated significantly reduced mean (V(m)), systolic (V(s)), and diastolic (V(d)) CBFV in the bilateral MCA and ACA compared to controls.
  • No significant differences in CBFV were observed in the BA between groups.
  • Within the MCI group, apoE epsilon4 allele carriers showed significantly lower CBFV in the bilateral MCA compared to non-carriers.

Conclusions:

  • Reduced CBFV in the cerebral arteries is associated with MCI.
  • The presence of the apoE epsilon4 allele exacerbates CBFV reduction in individuals with MCI.
  • Longitudinal studies tracking CBFV and cognitive changes are warranted for potential early diagnosis of Alzheimer's disease.

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