Bumetanide reduce the seizure susceptibility induced by pentylenetetrazol via inhibition of aberrant hippocampal neurogenesis in neonatal rats after hypoxia-ischemia.
Hypoxia-ischemia brain damage (HIBD) is one of prevalent causes of neonatal mortality and morbidity. Our data demonstrated that hypoxia-ischemia (HI) induced Na+-K+-Cl--co-transporter 1 (NKCC1) increasing in hippocampus. Previous studies demonstrated that NKCC1 regulates various stages of neurogenesis. In this study, we studied the role of increased NKCC1 in regulating of HI-induced neurogenesis. HIBD model was established in 7days old Sprague-Dawley rat pup, and the expression of NKCC1 was detected by western blot and qPCR. Brain electrical activity in freely rats was monitored by electroencephalography (EEG) recordings. HI-induced neurogenesis was detected by immunofluorescence staining. Neurobehavioral test was to investigate the neuro-protective role of bumetanide, an inhibitor of NKCC1, on neonatal rats after HI. The results showed that bumetanide treatment significantly reduced brain electrical activity and the seizure stage of epilepsy induced by pentylenetetrazol (PTZ) in vivo after HI. In addition, bumetanide restored aberrant hippocampal neurogenesis and associated cognitive function. Our data demonstrated that bumetanide reduces the susceptibility of epilepsy induced by PTZ in rats suffering from HI injury during neonatal period via restoring the ectopic newborn neurons in dentate gyrus (DG) and cognitive function.
Department of Physiology, Hubei Provincial Key Laboratory of Developmentally OriginatedDisorder, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China.
Jiang-Jian
JJ
Hu
Department of Physiology, Hubei Provincial Key Laboratory of Developmentally OriginatedDisorder, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China.
Xing-Liang
XL
Yang
Department of Physiology, Hubei Provincial Key Laboratory of Developmentally OriginatedDisorder, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China.
Wen-Di
WD
Luo
Department of Pathophysiology, Hubei Provincial Key Laboratory of Developmentally OriginatedDisorder, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China.
Song
S
Han
Department of Pathophysiology, Hubei Provincial Key Laboratory of Developmentally OriginatedDisorder, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China.
Jun
J
Yin
Department of Immunology, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China.
Wan-Hong
WH
Liu
Department of Pathophysiology, Hubei Provincial Key Laboratory of Developmentally OriginatedDisorder, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China.
Xiao-Hua
XH
He
Department of Physiology, Hubei Provincial Key Laboratory of Developmentally OriginatedDisorder, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei, China. Electronic address: pengbiwen@whu.edu.cn.
Bi-Wen
BW
Peng
D000818:Animals; D000831:Animals, Newborn; D000927:Anticonvulsants / Q000008:administration & dosage*; D002034:Bumetanide / Q000008:administration & dosage*; D002465:Cell Movement / Q000187:drug effects; D049109:Cell Proliferation; D004569:Electroencephalography; D006624:Hippocampus / Q000187:drug effects / Q000378:metabolism / Q000503:physiopathology*; D020925:Hypoxia-Ischemia, Brain / Q000150:complications*; D008568:Memory / Q000187:drug effects; D055495:Neurogenesis / Q000187:drug effects*; D010433:Pentylenetetrazole / Q000008:administration & dosage; D017207:Rats, Sprague-Dawley; D012640:Seizures / Q000139:chemically induced / Q000150:complications / Q000378:metabolism / Q000503:physiopathology*; D064506:Solute Carrier Family 12, Member 2 / Q000378:metabolism
D000927:Anticonvulsants; C578879:Slc12a2 protein, rat; D064506:Solute Carrier Family 12, Member 2; D002034:Bumetanide; D010433:Pentylenetetrazole
Bumetanide; Cognitive decline; Hypoxia-ischemia brain damage; NKCC1; Neurogenesis