PT  - JOURNAL ARTICLE
AU  - Haghdoost-Yazdi, Hashem
AU  - Piri, Hossein
AU  - Najafipour, Reza
AU  - Faraji, Ayda
AU  - Fraidouni, Negin
AU  - Dargahi, Tahereh
AU  - Heidari, Mahmud Alipour
TI  - Blockade of fast A-type and TEA-sensitive potassium channels provide an antiparkinsonian effect in a 6-OHDA animal model
AID  - 10.17712/nsj.2017.1.20160266
DP  - 2017 Jan 01
TA  - Neurosciences Journal
PG  - 44--50
VI  - 22
IP  - 1
4099  - http://nsj.org.sa/content/22/1/44.short
4100  - http://nsj.org.sa/content/22/1/44.full
SO  - Neurosciences (Riyadh)2017 Jan 01; 22
AB  - Objective: To evaluate the effect of K+ channels inhibitors in treatment of parkinson’s disease (PD).Methods: This prospective comparative study was conducted in the Qazvin University of Medical Sciences, Iran, from April 2015 to January 2016. Male rats (n=37) received intraperitoneal doses of TEA (2 and 5 mg/kg) or 4-AP (0.5 and 1 mg/kg) twice-daily, before a stereotactic injection of 6-hydroxydopamine (6-OHDA) for the following 7 days. The 6-OHDA was injected into right medial forebrain bundle (MFB) of the rat brains. Development and severity of PD were assessed using the apomorphine-induced rotational test, the elevated body swing test and rotarod tests. Concentration of malondialdehyde (MDA), a marker of oxidative stress, was measured in rat sera.Results: Tetraethylammonium and 4-AP significantly reduced the number of apomorphine-induced rotations and improved motor learning in the rotarod test at both doses. Administration of 4-AP and TEA together was more effective than single administration of either agent. Malondialdehyde measurement showed that pretreatment with TEA could not prevent 6-OHDA-induced oxidative stress.Conclusion: Our results showed that pretreatment with TEA and 4-AP has a neuroprotective effect against 6-OHDA in dopaminergic neurons in the substantia nigra.