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Low intake of magnesium can increase the risk of many diseases, in particular, chronic degenerative disorders. However, its role in prevention of DNA damage has not been studied fully in humans so far. Therefore, we tested the hypothesis that magnesium deficiency either on its own or in conjunction with high homocysteine (Hcy) induces DNA damage in vivo in humans.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>The present study was carried out in 172 healthy middle aged subjects from South Australia. Blood levels of magnesium, Hcy, folate and vitamin B<jats:sub>12<\/jats:sub> were measured. Cytokinesis-Block Micronucleus cytome assay was performed to measure three DNA damage biomarkers: micronuclei (MN), nucleoplasmic bridges (NPBs) and nuclear buds (NBuds) in peripheral blood lymphocytes.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Data showed that magnesium and Hcy are significantly inversely correlated with each other (<jats:italic>r<\/jats:italic>\u2009=\u2009\u2212\u20090.299, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). Furthermore, magnesium is positively correlated both with folate (<jats:italic>p<\/jats:italic>\u2009=\u20090.002) and vitamin B<jats:sub>12<\/jats:sub> (<jats:italic>p<\/jats:italic>\u2009=\u20090.007). Magnesium is also significantly inversely correlated with MN (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001) and NPB (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). Individuals with low magnesium and high Hcy exhibited significantly higher frequency of MN and NPBs compared to those with high magnesium and low Hcy (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). Furthermore, there was an interactive effect between these two factors as well in inducing MN (<jats:italic>p<\/jats:italic>\u2009=\u20090.01) and NPB (<jats:italic>p<\/jats:italic>\u2009=\u20090.048).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>The results obtained in the present study indicate for the first time that low in vivo levels of magnesium either on its own or in the presence of high Hcy increases DNA damage as evident by higher frequencies of MN and NPBs.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s00394-024-03449-0","type":"journal-article","created":{"date-parts":[[2024,6,12]],"date-time":"2024-06-12T09:01:53Z","timestamp":1718182913000},"page":"2555-2565","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Low magnesium in conjunction with high homocysteine increases DNA damage in healthy middle aged Australians"],"prefix":"10.1007","volume":"63","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1094-6302","authenticated-orcid":false,"given":"Varinderpal S.","family":"Dhillon","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6477-9127","authenticated-orcid":false,"given":"Permal","family":"Deo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8466-0991","authenticated-orcid":false,"given":"Michael","family":"Fenech","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,6,12]]},"reference":[{"issue":"47","key":"3449_CR1","doi-asserted-by":"publisher","first-page":"17589","DOI":"10.1073\/pnas.0608757103","volume":"103","author":"BN Ames","year":"2006","unstructured":"Ames BN (2006) Low micronutrient intake may accelerate the degenerative diseases of aging through allocation of scarce micronutrients by triage. 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