{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,11]],"date-time":"2026-09-11T05:09:12Z","timestamp":1789103352223,"version":"build-2803163510"},"reference-count":39,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2012,7,10]],"date-time":"2012-07-10T00:00:00Z","timestamp":1341878400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Experimental Physiology"],"published-print":{"date-parts":[[2013,1]]},"abstract":"<jats:title>New Findings<\/jats:title><jats:p><jats:list list-type=\"explicit-label\">\n<jats:list-item><jats:p><jats:bold>What is the central question of this study?<\/jats:bold><\/jats:p><jats:p>Maternal separation exacerbates behavioural deficits induced by 6\u2010hydroxydopamine lesioning in a rat model of Parkinson's disease. In contrast, voluntary exercise reduces these effects due to compensation in the non\u2010lesioned hemisphere. We have asked how maternal separation and exercise affect protein expression in lesioned and non\u2010lesioned hemispheres of the rat brain.<\/jats:p><\/jats:list-item>\n<jats:list-item><jats:p><jats:bold>What is the main finding and its importance?<\/jats:bold><\/jats:p><jats:p>Using isobaric tagging and quantification of peptides by matrix\u2010assisted laser desorption\/ionization tandem mass spectrometry, we show that exercise and maternal separation have opposing effects on the hippocampus in the non\u2010lesioned hemisphere, with exercise partially reversing effects of maternal separation on the levels of energy metabolism and synaptic plasticity proteins.<\/jats:p><\/jats:list-item>\n<\/jats:list><\/jats:p><jats:p>Animals subjected to maternal separation stress during the early stages of development display behavioural, endocrine and growth factor abnormalities that mirror the clinical findings in anxiety\/depression. In addition, maternal separation has been shown to exacerbate the behavioural deficits induced by 6\u2010hydroxydopamine (6\u2010OHDA) in a rat model of Parkinson's disease. In contrast, voluntary exercise reduced the detrimental effects of 6\u2010OHDA in the rat model. The beneficial effects of exercise appeared to be largely due to compensation in the non\u2010lesioned hemisphere. The aim of the present study was to investigate whether voluntary exercise for 3 weeks could reverse the effects of maternal separation in rats challenged with the neurotoxin 6\u2010OHDA infused into the medial forebrain bundle after 1 week of exercise, at postnatal day 60. The rats were killed 2 weeks later, at postnatal day 74. Their brains were dissected and the hippocampus rapidly removed for proteomic analysis by isobaric tagging (iTRAQ) and quantification of peptides by matrix\u2010assisted laser desorption\/ionization tandem mass spectrometry (MALDI\u2010MS\/MS). Maternal separation upregulated hippocampal proteins functionally involved in energy metabolism (nucleoside diphosphate kinase B, enolase and triosephosphate isomerase) and synaptic plasticity (\u03b1\u2010synuclein, tenascin\u2010R, Ba1\u2010667, brevican and neurocan core protein) in the non\u2010lesioned hemisphere. Exercise reversed many of these changes by downregulating the levels of hippocampal proteins functionally associated with energy metabolism (nucleoside diphosphate kinase B, enolase and triosephosphate isomerase) and synaptic plasticity (\u03b1\u2010synuclein, tenascin\u2010R, Ba1\u2010667, brevican and neurocan core protein) in the non\u2010lesioned hemisphere of rats subjected to maternal separation. Exercise and maternal separation therefore appeared to have opposing effects on the hippocampus in the non\u2010lesioned hemisphere of the rat brain. Exercise seemed partly to reverse the effects of maternal separation stress on these proteins in the non\u2010lesioned hemisphere. The partial reversal of maternal separation\u2010induced proteins by exercise in the non\u2010lesioned side sheds some insight into the mechanism by which exercise alters the molecular role players involved in determining the consequences of early life stress.<\/jats:p>","DOI":"10.1113\/expphysiol.2012.066720","type":"journal-article","created":{"date-parts":[[2012,5,26]],"date-time":"2012-05-26T04:28:56Z","timestamp":1338006536000},"page":"233-244","source":"Crossref","is-referenced-by-count":31,"title":["Exercise partly reverses the effect of maternal separation on hippocampal proteins in 6\u2010hydroxydopamine\u2010lesioned rat brain"],"prefix":"10.1113","volume":"98","author":[{"given":"J. J.","family":"Dimatelis","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"Hendricks","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.","family":"Hsieh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N. M.","family":"Vlok","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"Bugarith","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"W. M. U.","family":"Daniels","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"V. 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