循環性微量元素と認知機能障害との関連

Rapid industrialization and urbanization have caused a significant increase in environmental pollution of bio-elements in India. Changes in bio-element concentrations, particularly an imbalance in the normal homeostasis in the blood leads to severe neurodegenerative effect. There has been very limited data on the association of bio-elements and cognitive decline. Present study performed the quantitative profiling of circulatory bio-element in cognitively impaired (CI) patients.

Elemental quantification of 19 elements were performed inductively coupled plasma mass spectrometry (Agilent Technologies, USA). A total of 65 participants were recruited for the study. All the participants underwent comprehensive clinical and functional assessments for cognitive abilities.

Quantitative profiling revealed a significant increase in eight elements (Li, Al, V, Mn, Co, Ni, Zn, and Ag) in CI patients compared to control. MMSE score analysis was found to be 13.77 ± 0.9921 in CI compared to control 27.78 ± 0.3575. The concentrations of Li (Control; 25.84 ± 3.051 µg /L; CI; 41.52 ± 5.312 µg /L), Al (Control; 2.582 ± 0.739 µg /L; CI; 21.17 ± 6.092 µg /L), V (Control; 2.583 ± 0.739 µg /L; CI; 13.59 ± 2.757 µg /L), Mn (Control; 20.56 ± 1.919 µg /L; CI; 36.06 ± 3.086 µg /L), Co (Control; 2.52 ± 0.220 µg /L; CI; 4.143 ± 0.287 µg /L), Ni (Control; 2.723 ± 0.752 µg /L; CI; 22.83 ± 4.456 µg /L) Zn (Control; 8040 ± 1199 µg /L; CI; 11121 ± 838.6 µg /L) and Ag (Control; 0.7454 ± 0.127 µg /L; CI; 3.302 ± 0.699 µg /L).

Present study suggest that bio-elements (Li, Al, V, Mn, Co, Ni, Zn, and Ag) may contribute to generate a distinctive signature in CI patients, and its detection in elderly might help in early management of element induced neurotoxicity.