利用基于影像的染色质和表观遗传衰老生物标志物测量单细胞衰老

Overview

This protocol outlines the imaging and computational workflow for extracting and validating imaging-based chromatin and epigenetic age (ImAge). The technique allows for quantifying aging and rejuvenation at single cell resolution.

Key Study Components

Area of Science

• Neuroscience
• Biology

Background

• Traditional DNA methylation clocks estimate biological age but rely on linear regression.
• Current methods require large cohorts and often destroy samples.
• These limitations make them costly and unsuitable for large-scale or longitudinal studies.

Purpose of Study

• To develop a novel technique for quantifying aging at single cell resolution.
• To provide an alternative to existing biological age estimation methods.

Methods Used

• Transfer frozen organs and tissues to a pre-chilled mortar over dry ice.
• Grind the frozen tissue with liquid nitrogen until a fine powder is obtained.
• Aliquot the ground tissue into multiple tubes.
• Extract nuclei and mix with trypan blue for analysis.

Main Results

• The imaging-based technique allows for detailed analysis of chromatin and epigenetic age.
• It provides a more efficient and less destructive method for biological age estimation.

Conclusions

• The ImAge technique offers a promising alternative for studying aging and rejuvenation.
• It enables researchers to conduct large-scale and longitudinal studies without sample destruction.

Frequently Asked Questions