{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T15:30:53Z","timestamp":1760887853626,"version":"3.28.0"},"reference-count":68,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2006,4,1]],"date-time":"2006-04-01T00:00:00Z","timestamp":1143849600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2006,4,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>This study was designed to investigate the therapeutic potential of meso 2,3-dimercaptosuccinic acid (DMSA) and one of its monoesters, monoisoamyl DMSA (MiADMSA), individually or when administered in combination with an extract of Centella asiatica against experimental lead intoxication in rats. Biochemical variables indicative of alterations in the central nervous system and haem biosynthesis were investigated to determine the toxicity in male Wistar rats. Thirty five rats were exposed to 0.2% lead acetate for 10 weeks, followed by 10 days of treatment with DMSA and MiADMSA (50 mg kg\u22121, i.p., once daily) alone and in combination with C. asiatica (200 mg kg\u22121, p.o., once daily). Biochemical variables indicative of oxidative stress and brain biogenic amines, along with lead concentration in blood and brain, were measured. Lead exposure caused a significant depletion of blood and brain \u03b4-aminolevulinic acid dehydratase (ALAD) activity, an important enzyme of the haem biosynthesis pathway, and glutathione (GSH) level. These changes were accompanied by a marked increase in reactive oxygen species (ROS) level, thiobarbituric acid reactive substances (TBARS), \u03b4-aminolevulinic acid synthase (ALAS) and oxidized glutathione (GSSG) activity in blood and brain. Significant depletion of brain noradrenaline (norepinephrine, NE), 5-hydroxytryptamine (5-HT), dopamine (DA) and acetylcholinesterase (AChE) also were observed following lead exposure. Also seen was a significant depletion in brain glutathione peroxidase (GPx), glutathione S-transferase (GST) and monoamine oxidase activity, as well as blood and brain superoxide dismutase (SOD) activity. These biochemical changes were correlated with an increased uptake of lead in blood and brain. Combined administration of MiADMSA and C. asiatica was most effective in reducing these alterations, including biogenic amines, besides reducing body lead burden, compared with individual treatment with MiADMSA. Certain other biochemical variables responded favourably to combination therapy and monotherapy with MiADMSA. Thus, supplementation of C. asiatica during chelation could be recommended for achieving optimum effects of chelation therapy.<\/jats:p>","DOI":"10.1211\/jpp.58.4.0015","type":"journal-article","created":{"date-parts":[[2006,3,20]],"date-time":"2006-03-20T21:28:24Z","timestamp":1142890104000},"page":"547-559","source":"Crossref","is-referenced-by-count":25,"title":["Changes in brain biogenic amines and haem biosynthesis and their response to combined administration of succimers and <i>Centella asiatica<\/i> in lead poisoned rats"],"prefix":"10.1093","volume":"58","author":[{"given":"Geetu","family":"Saxena","sequence":"first","affiliation":[{"name":"Division of Pharmacology and Toxicology, Defence Research and Development Establishment , Jhansi Road, Gwalior-474 002,","place":["India"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S J S","family":"Flora","sequence":"additional","affiliation":[{"name":"Division of Pharmacology and Toxicology, Defence Research and Development Establishment , Jhansi Road, Gwalior-474 002,","place":["India"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2006,4,1]]},"reference":[{"key":"2024103109334633600_cit1","doi-asserted-by":"crossref","first-page":"279","DOI":"10.1146\/annurev.pa.30.040190.001431","article-title":"Meso-2, 3-dimercapto-succinic acid: chemical, pharmacological and toxicological properties of an orally effective metal chelating agent","volume":"30","author":"Aposhian","year":"1990","journal-title":"Annu. 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