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Chronic treatment with taurine after intracerebroventricular streptozotocin injection improves cognitive dysfunction in rats by modulating oxidative stress, cholinergic functions and neuroinflammation.
Neurochem Int. 2017 Sep; 108:146-156.NI

Abstract

The present study investigated the neuroprotective effects of taurine, an essential amino acid for growth and development of central nervous system. Intracerebroventricular streptozotocin (ICV-STZ) model of cognitive impairment was used in male Wistar rats (270 ± 20 g). Morris water maze, elevated plus maze and passive avoidance paradigm were used to assess cognitive performance. Taurine (40, 60 and 120 mg/kg) was administered orally for 28 days following STZ administration on day 1. Oxidative stress parameters (malondialdehyde, glutathione, nitric oxide and superoxide dismutase) and cholinesterases (acetylcholinesterase and butyrylcholinesterase) activity were measured at end of the study in the cortex and hippocampus. Levels of TNF-α, IL-1β, expression of rho kinase-II (ROCK-II), glycogen synthase kinase-3β (GSK-3β) and choline acetyltransferase (ChAT) were studied in cortex and hippocampus. STZ caused significant cognitive impairment as compared to normal control. Chronic administration of taurine attenuated STZ-induced cognitive impairment. Increased oxidative stress and increased levels of TNF-α, IL-1β induced by STZ were also significantly attenuated by taurine. Taurine significantly (p < 0.05) decreased the STZ-induced increased expression of ROCK-II in cortex and hippocampus. Further, STZ-induced increased activity of cholinesterases was significantly (p < 0.001) mitigated by taurine. STZ decreased the expression of ChAT in hippocampus which was significantly (p < 0.05) reversed by taurine. However, GSK-3β expression was not altered by either STZ or taurine. The present study indicates that taurine exerts a neuroprotective role against STZ-induced cognitive impairment in rats. This effect is probably mediated by modulating oxidative stress, cholinesterases, inflammatory cytokines and expression of ROCK-II. Thus, this study suggests a potential of chronic taurine administration in cognitive impairment of Alzheimer's type.

Authors+Show Affiliations

Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India. Electronic address: reetakh@gmail.com.Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India.Department of Pharmacology, All India Institute of Medical Sciences, New Delhi, India.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28284975

Citation

Reeta, K H., et al. "Chronic Treatment With Taurine After Intracerebroventricular Streptozotocin Injection Improves Cognitive Dysfunction in Rats By Modulating Oxidative Stress, Cholinergic Functions and Neuroinflammation." Neurochemistry International, vol. 108, 2017, pp. 146-156.
Reeta KH, Singh D, Gupta YK. Chronic treatment with taurine after intracerebroventricular streptozotocin injection improves cognitive dysfunction in rats by modulating oxidative stress, cholinergic functions and neuroinflammation. Neurochem Int. 2017;108:146-156.
Reeta, K. H., Singh, D., & Gupta, Y. K. (2017). Chronic treatment with taurine after intracerebroventricular streptozotocin injection improves cognitive dysfunction in rats by modulating oxidative stress, cholinergic functions and neuroinflammation. Neurochemistry International, 108, 146-156. https://doi.org/10.1016/j.neuint.2017.03.006
Reeta KH, Singh D, Gupta YK. Chronic Treatment With Taurine After Intracerebroventricular Streptozotocin Injection Improves Cognitive Dysfunction in Rats By Modulating Oxidative Stress, Cholinergic Functions and Neuroinflammation. Neurochem Int. 2017;108:146-156. PubMed PMID: 28284975.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chronic treatment with taurine after intracerebroventricular streptozotocin injection improves cognitive dysfunction in rats by modulating oxidative stress, cholinergic functions and neuroinflammation. AU - Reeta,K H, AU - Singh,Devendra, AU - Gupta,Y K, Y1 - 2017/03/08/ PY - 2016/09/27/received PY - 2017/03/01/revised PY - 2017/03/06/accepted PY - 2017/3/13/pubmed PY - 2018/4/14/medline PY - 2017/3/13/entrez KW - ChAT KW - Cholinesterases KW - Cognitive impairment KW - Inflammatory cytokines KW - ROCK-II KW - Taurine SP - 146 EP - 156 JF - Neurochemistry international JO - Neurochem Int VL - 108 N2 - The present study investigated the neuroprotective effects of taurine, an essential amino acid for growth and development of central nervous system. Intracerebroventricular streptozotocin (ICV-STZ) model of cognitive impairment was used in male Wistar rats (270 ± 20 g). Morris water maze, elevated plus maze and passive avoidance paradigm were used to assess cognitive performance. Taurine (40, 60 and 120 mg/kg) was administered orally for 28 days following STZ administration on day 1. Oxidative stress parameters (malondialdehyde, glutathione, nitric oxide and superoxide dismutase) and cholinesterases (acetylcholinesterase and butyrylcholinesterase) activity were measured at end of the study in the cortex and hippocampus. Levels of TNF-α, IL-1β, expression of rho kinase-II (ROCK-II), glycogen synthase kinase-3β (GSK-3β) and choline acetyltransferase (ChAT) were studied in cortex and hippocampus. STZ caused significant cognitive impairment as compared to normal control. Chronic administration of taurine attenuated STZ-induced cognitive impairment. Increased oxidative stress and increased levels of TNF-α, IL-1β induced by STZ were also significantly attenuated by taurine. Taurine significantly (p < 0.05) decreased the STZ-induced increased expression of ROCK-II in cortex and hippocampus. Further, STZ-induced increased activity of cholinesterases was significantly (p < 0.001) mitigated by taurine. STZ decreased the expression of ChAT in hippocampus which was significantly (p < 0.05) reversed by taurine. However, GSK-3β expression was not altered by either STZ or taurine. The present study indicates that taurine exerts a neuroprotective role against STZ-induced cognitive impairment in rats. This effect is probably mediated by modulating oxidative stress, cholinesterases, inflammatory cytokines and expression of ROCK-II. Thus, this study suggests a potential of chronic taurine administration in cognitive impairment of Alzheimer's type. SN - 1872-9754 UR - https://www.unboundmedicine.com/medline/citation/28284975/Chronic_treatment_with_taurine_after_intracerebroventricular_streptozotocin_injection_improves_cognitive_dysfunction_in_rats_by_modulating_oxidative_stress_cholinergic_functions_and_neuroinflammation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0197-0186(16)30344-8 DB - PRIME DP - Unbound Medicine ER -