Age-dependent and gender-specific changes in mouse tissue iron by strain

Area of Science:

• Biochemistry
• Aging Research
• Neuroscience

Background:

• Iron is essential for biological functions but can cause oxidative stress.
• Iron dysregulation is linked to age-related diseases.
• Understanding age- and sex-dependent iron changes is crucial for disease research.

Purpose of the Study:

• To investigate age- and sex-related changes in iron levels across multiple mouse tissues.
• To compare iron levels in different mouse strains (C57BL/6, DBA/2J, BALB/c).
• To establish baseline iron data for future studies on aging and disease.

Main Methods:

• Dissection of brain, liver, heart, retina, and RPE/choroid from young and aged male and female mice.
• Quantification of iron using spectrophotometry and atomic absorption spectrophotometry.
• Analysis of iron levels across different strains, ages, and sexes.

Main Results:

• Aged mice showed 30-70% higher iron in brain, liver, and heart compared to young mice.
• Retina and RPE/choroid iron levels exhibited variable age-related changes.
• Significant sex differences were found: males had higher iron in brain and eyes, females in the liver.

Conclusions:

• Iron levels increase with age in several key organs.
• Genetics and sex hormones influence iron regulation during aging.
• These findings provide essential data for future research into iron's role in aging and disease.