Trace elements in the human central nervous system studied with neutron activation analysis.

Area of Science:

• Neuroscience
• Trace Element Analysis
• Nuclear Chemistry

Background:

• The central nervous system (CNS) is highly sensitive to trace element imbalances due to its high metabolism and limited regeneration.
• Few studies have investigated trace element concentrations within the human CNS.
• This research addresses the need for more data on CNS trace elements.

Purpose of the Study:

• To quantify trace element concentrations in different brain lobes and the spinal cord.
• To compare trace element profiles in Alzheimer's disease patients versus control subjects.

Main Methods:

• Autopsy-obtained CNS samples (brain lobes, spinal cord) were carefully handled to prevent contamination.
• Samples underwent freeze-drying, sealing in quartz tubes, and neutron irradiation in a nuclear reactor.
• Neutron Activation Analysis (NAA) with Ge(Li) detector and multichannel analyzer was used for element quantification after chemical separation.

Main Results:

• Concentrations of Ca, Cd, Co, Cr, Cs, Cu, Fe, Rb, Se, and Zn were determined.
• Na and K levels were also measured but not reported.
• Trace element data was successfully acquired for ten Alzheimer's disease patients and ten controls.

Conclusions:

• The study established a methodology for analyzing trace elements in CNS tissues.
• This technique allows for the examination of potential links between trace element dysregulation and neurological conditions like Alzheimer's disease.