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Summary
This summary is machine-generated.

Genetic variants in the methylenetetrahydrofolate reductase (MTHFR) gene are linked to elevated homocysteine. An intronic MTHFR variant (1:11793135) was significantly associated with higher homocysteine levels in an elderly Indian cohort.

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Area of Science:

  • Genetics
  • Biochemistry
  • Gerontology

Background:

  • Methylenetetrahydrofolate reductase (MTHFR) is crucial for folate metabolism and homocysteine regulation.
  • MTHFR gene variants are linked to elevated homocysteine, a risk factor for cognitive decline.
  • The TATA Longitudinal Study of Aging (TLSA) cohort was used to investigate MTHFR gene variations.

Purpose of the Study:

  • To investigate genetic variations in the MTHFR gene and its flanking regions.
  • To determine the association between MTHFR variants and homocysteine levels in an elderly Indian population.
  • To explore potential genetic predispositions to altered homocysteine metabolism in aging.

Main Methods:

  • Genotype-phenotype analysis was performed on 376 participants from the TLSA cohort after quality control.
  • PLINK v1.9.0 was used for analysis, accounting for age, gender, vitamin B12, and folic acid levels.
  • Statistical methods included Mann-Whitney and Chi-Squared tests for demographic and homocysteine level comparisons.

Main Results:

  • The TLSA cohort (N=696, mean age 73.6 years) exhibited elevated mean homocysteine levels (19.4 μmol/L).
  • An intronic MTHFR variant (1:11793135) with an allele frequency of 0.0213 showed a significant association with higher homocysteine levels (p=0.01867).
  • The analysis adjusted for age, gender, vitamin B12, and folic acid levels.

Conclusions:

  • A significant association was found between MTHFR variant 1:11793135 and elevated homocysteine levels in an elderly Indian population.
  • These findings suggest a potential genetic predisposition to altered homocysteine metabolism in aging individuals.
  • The study highlights the importance of genetic screening for MTHFR polymorphisms and targeted interventions to mitigate cognitive decline.