Changes in human sirtuin 6 gene promoter methylation during aging

Area of Science:

• Genetics and Epigenetics
• Aging Research
• Molecular Biology

Background:

• Aging is a natural process linked to cellular changes and increased disease susceptibility.
• Sirtuins, a family of proteins, play a role in regulating lifespan by modifying transcription factors.
• SIRT6 is a mammalian sirtuin, and its depletion is associated with premature aging symptoms.

Purpose of the Study:

• To investigate the association between human longevity and SIRT6 promoter methylation.
• To understand how SIRT6 gene activity changes across different age groups.

Main Methods:

• Analysis of genomic DNA from blood samples of 55 individuals across various age groups.
• Quantification of SIRT6 promoter methylation levels using quantitative polymerase chain reaction (qPCR) after bisulfite treatment.

Main Results:

• SIRT6 promoter methylation was 43.21% in the 9-19 age group.
• Methylation increased to 65.63% in the 20-79 age group.
• Methylation decreased to 52.15% in the 80-95 age group, indicating higher gene activity in younger and older individuals.

Conclusions:

• SIRT6 gene promoter methylation patterns differ significantly across human lifespan.
• The SIRT6 gene exhibits higher activity in the 9-19 and 80-95 age groups compared to the 20-79 age group.
• These findings contribute to understanding the role of SIRT6 in aging and longevity.