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Repeated Forced Swim Exacerbates Methamphetamine-Induced Neurotoxicity: Neuroprotective Effects of Nanowired Delivery of 5-HT3-Receptor Antagonist Ondansetron
Univ Basque Country UPV EHU, Dept Neurosci, LaNCE, Leioa, Biscay, Spain.;BioCruces Hlth Res Inst, Nanoneurosurg Grp, Baracaldo 48903, Biscay, Spain.;Univ Autonoma Chile, Fac Hlth Sci, Santiago, Chile..
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Anaesthesiology and Intensive Care. Univ Basque Country UPV EHU, Dept Neurosci, LaNCE, Leioa, Biscay, Spain.; Uppsala Univ, Univ Hosp, Int Expt CNS Injury & Repair IECNSIR, Frodingsgatan 12,Bldg 28, SE-75421 Uppsala, Sweden..
RoNeuro Inst Neurol Res & Diagnost, 37 Mircea Eliade St, Cluj Napoca, Romania.;Univ Med & Pharm, Dept Clin Neurosci, Cluj Napoca, Romania..
Univ Arkansas, Dept Biomed Engn, Fayetteville, AR 72701 USA..
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2018 (English)In: Molecular Neurobiology, ISSN 0893-7648, E-ISSN 1559-1182, Vol. 55, no 1, p. 322-334Article in journal (Refereed) Published
Abstract [en]

The possibility that stress associated with chronic forced swim (FS) may exacerbate methamphetamine (METH) neurotoxicity was examined in a rat model. Rats were subjected to FS in a pool (30 degrees C) for 15 min daily for 8 days. Control rats were kept at room temperature. METH was administered (9 mg/kg, s.c.) in both control and FS rats and allowed to survive 4 h after the drug injection. METH in FS rats exacerbated BBB breakdown to Evans blue albumin (EBA) by 150 to 220% and ([131])-Iodine by 250 to 380% as compared to naive rats after METH. The METH-induced BBB leakage was most pronounced in the cerebral cortex followed by the hippocampus, cerebellum, thalamus, and hypothalamus in both FS and naive rats. The regional BBB changes were associated with a reduction in the local cerebral blood flow (CBF). Brain edema was also higher by 2 to 4% in FS rats after METH than in naive animals. Neuronal and glial cell injuries were aggravated by threefold to fivefold after METH in FS than the control group. Pretreatment with ondansetron (1 mg/kg, i.p.) 30 min before METH injection in naive rats reduced the brain pathology and improved the CBF. However, TiO2-nanowired delivery of ondansetron (1 mg/kg, i.p.) was needed to reduce METH-induced brain damage, BBB leakage, reduction in CBF, and edema formation in FS. Taken together, these observations are the first to show that METH exacerbates BBB breakdown leading to neurotoxicity in FS animals. This effect of METH-induced BBB breakdown and brain pathology in naive and FS rats is attenuated by ondansetron treatment indicating an involvement of 5-HT3 receptors, not reported earlier.

Place, publisher, year, edition, pages
Humana Press, 2018. Vol. 55, no 1, p. 322-334
Keywords [en]
Forced swim (FS), Methamphetamine (METH), Blood-brain barrier (BBB), Brain edema, 5-HT3 receptor, Ondansetron, TiO2 nanodelivery, Brain pathology
National Category
Neurosciences
Identifiers
URN: urn:nbn:se:uu:diva-346904DOI: 10.1007/s12035-017-0744-7ISI: 000424702600032PubMedID: 28861718OAI: oai:DiVA.org:uu-346904DiVA, id: diva2:1193623
Available from: 2018-03-27 Created: 2018-03-27 Last updated: 2018-03-27Bibliographically approved

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