Age-related variations of elements as compared among optic, radial, and sciatic nerves

Area of Science:

• Neuroscience
• Biochemistry
• Gerontology

Background:

• Peripheral nerve health is crucial for motor and sensory functions.
• Aging is associated with various physiological changes, including alterations in nerve composition.
• Understanding age-related elemental changes in nerves can provide insights into nerve function and degeneration.

Purpose of the Study:

• To investigate age-related changes in elemental content within the optic, radial, and sciatic nerves.
• To identify specific elements that change with aging and their distribution across different nerve types.

Main Methods:

• Inductively coupled plasma-atomic emission spectrometry (ICP-AES) was used to quantify elemental content.
• Analysis was performed on optic, radial, and sciatic nerves from human subjects aged 61-97 years.
• Statistical correlations were examined between age and the concentration of various elements.

Main Results:

• Phosphorus and sulfur content remained constant across all studied nerves with aging.
• Calcium content showed differential age-related changes: increasing in optic nerves, stable in radial nerves, and decreasing in sciatic nerves.
• Significant correlations with age were observed for zinc and sodium in radial nerves, and for silicon and iron in sciatic nerves. A correlation between silicon and iron was also noted in sciatic nerves.

Conclusions:

• Elemental composition of peripheral nerves undergoes significant age-related modifications, particularly for calcium, silicon, iron, zinc, and sodium.
• These findings highlight the heterogeneity of aging processes across different peripheral nerve types.
• Further research is warranted to understand the functional implications of these elemental shifts in aging nerves.