Expression analysis of genes important for maintaining skin function in a senescence-accelerated mouse prone model

Area of Science:

• Gerontology
• Dermatology
• Molecular Biology

Background:

• Senescence-accelerated mouse prone (SAMP) mice are models for accelerated aging.
• Research on skin function in SAMP mice is limited.
• Understanding skin aging mechanisms is crucial for geriatric care.

Purpose of the Study:

• To investigate skin function in SAMP mice.
• To analyze the expression of genes critical for skin integrity and hydration.
• To evaluate the potential of SAMP mice as a model for skin aging.

Main Methods:

• Comparison of 8-month-old SAMP mice with senescence-accelerated mouse resistant (SAMR) mice.
• Analysis of dermal water content.
• Quantification of mRNA and protein expression levels for key skin genes (e.g., elastin, filaggrin, collagen, hyaluronan synthase, aquaporin-3).

Main Results:

• SAMP mice showed significantly lower dermal water content, indicative of dry skin.
• Decreased mRNA expression of elastin, filaggrin, loricrin, collagen type I alpha 1 chain, and collagen type I alpha 2 chain was observed in SAMP mice.
• Hyaluronan synthase 2 and aquaporin-3 expression were significantly reduced in SAMP mice skin at both mRNA and protein levels.

Conclusions:

• Reduced expression of multiple skin function-regulating genes in SAMP mice contributes to skin dryness.
• SAMP mice represent a viable animal model for investigating the molecular mechanisms of skin aging.
• This study highlights potential therapeutic targets for age-related skin conditions.