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Related Experiment Videos

pLG72 levels increase in early phase of Alzheimer's disease but decrease in late phase.

Chieh-Hsin Lin1,2,3, Chih-Chiang Chiu4,5, Chiung-Hsien Huang6

  • 1Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan.

Scientific Reports
|September 15, 2019
PubMed
Summary

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This summary is machine-generated.

Plasma pLG72 levels initially rise in mild cognitive impairment and early Alzheimer's disease, then decrease in later stages, suggesting a role in neurodegenerative dementia progression and N-methyl-D-aspartate receptor (NMDAR) function.

Area of Science:

  • Neuroscience
  • Biochemistry
  • Gerontology

Background:

  • Mitochondrial pLG72 is implicated in regulating N-methyl-D-aspartate receptors (NMDARs).
  • Oxidative stress and NMDAR dysfunction are key factors in neurodegenerative dementia.

Purpose of the Study:

  • To investigate the relationship between pLG72 levels and the severity of neurodegenerative dementia.
  • To explore potential links between pLG72, D-serine, and NMDAR function in dementia.

Main Methods:

  • Western blotting was used to measure plasma pLG72 levels in 376 participants across five groups: healthy elderly, mild cognitive impairment (MCI), mild, moderate, and severe Alzheimer's disease (AD).
  • Clinical Dementia Rating Scale assessed cognitive deficit severity.
  • A gender- and age-matched cohort was analyzed to control for these variables.

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Main Results:

  • pLG72 levels were elevated in MCI and mild AD groups compared to healthy controls.
  • pLG72 levels decreased in moderate and severe AD groups.
  • Significant differences in D-serine levels and D- to total serine ratio were observed across groups; L-serine levels correlated with pLG72.

Conclusions:

  • pLG72 levels vary with dementia severity, supporting a biphasic role in NMDAR function (hypofunction in early stages, hyperfunction in late stages).
  • Further research is needed to confirm pLG72 as a biomarker for NMDAR function in dementia.