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• W150521399 abstract "Current epidemiological surveys in the Western Pacific area and Kii Peninsula have suggested that low calcium (Ca), magnesium (Mg) and high aluminum (Al) and manganese (Mn) in river, soil and drinking water may be implicated in the pathogenetic process of amyotrophic lateral sclerosis (ALS) and parkinsonism-dementia (PD). The condition of unbalanced minerals was experimentally mimicked in this study using rats. Male Wistar rats, weighing 200 g, were maintained for 90 days on the following diets: (A) standard diet, (B) low Ca diet, (C) low Ca-Mg diet, (D) low Ca-Mg diet with high Al. In the groups maintained on unbalanced mineral diets, calcium and magnesium contents of the bones were lower than those fed with standard diet. On the other hand, Ca content of CNS showed higher values in the unbalanced diet groups (especially in spinal cord of the low Ca-Mg plus high Al diet group) than those in the standard diet group. This was determined by neutron activation analysis (NAA) at Research Reactor Institute, Kyoto University. Also, Ca content in soft tissues of rats given unbalanced mineral diets was higher than those on standard diet. Mg content of soft tissues and spinal cord of rats was markedly lower in the low Ca-Mg plus high Al diet group than the other three groups as determined by inductively coupled plasma emission spectrometry (ICP). Six Kii cases with amyotrophic lateral sclerosis (ALS) also showed higher Ca and lower Mg contents in the CNS tissues than those of neurologically normal controls. As of today, calcification of the spinal ligaments (CSL) has been reported in only 120 cases in the world and 28 cases of CSL in the Kii Peninsula have been found in the same foci as ALS. We analyzed Mg content of 7 spinal bones and 10 ligaments of the CSL and Ca content of 5 spinal bones compared with controls. The CSL showed lower values of Mg contents in bones and ligaments compared to controls. The Ca content in bones of CSL was significantly lower than that of controls. These results suggest that the environmental factor may contribute to the pathogenesis of CSL due to low Ca and Mg intake as well as for ALS." @default.
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• W150521399 date "1997-08-01" @default.
• W150521399 modified "2023-09-23" @default.
• W150521399 title "[Similarities in calcium and magnesium metabolism between amyotrophic lateral sclerosis and calcification of the spinal cord in the Kii Peninsula ALS focus]." @default.
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