Neuronal damage using fluoro-jade B histofluorescence and gliosis in the striatum after various durations of transient cerebral ischemia in gerbils.
Ischemic damage occurs well in vulnerable regions of the brain, including the hippocampus and striatum. In the present study, we examined neuronal damage/death and glial changes in the striatum 4 days after 5, 10, 15 and 20 min of transient cerebral ischemia using the gerbil. Spontaneous motor activity was increased with the duration time of ischemia-reperfusion (I-R). To examine neuronal damage, we used Fluoro-Jade B (F-J B, a marker for neuronal degeneration) histofluorescence staining. F-J B positive cells were detected only in the 20 min ischemia-group, not in the other groups. In addition, we examined gliosis of astrocytes and microglia using anti-glial fibrillary acidic protein (GFAP) and anti- ionized calcium-binding adapter molecule 1 (Iba-1), respectively. In the 5 min ischemia-group, GFAP-immunoreactive astrocytes were distinctively increased in number, and the immunoreactivity was stronger than that in the sham-group. In the 10, 15 and 20 min ischemia-groups, GFAP-immunoreactivity was more increased with the duration of I-R. On the other hand, the immunoreactivity and the number of Iba-1-immunoreactive microglia were distinctively increased in the 5 and 10 min ischemia-groups. In the 15 min ischemia-group, cell bodies of microglia were largest, and the immunoreactivity was highest; however, in the 20 min ischemia-group, the immunoreactivity was low compared to the 15 min ischemia-group. The results of western blotting for GFAP and Iba-1 were similar to the immunohistochemical data. In brief, these findings showed that neuronal death could be detected only in the 20 min ischemia-group 4 days after I-R, and the change pattern of astrocytes and microglia were apparently different according to the duration time of I-R.
Department of Emergency Medicine, Hallym University Sacred Heart Hospital, College of Medicine, Hallym University, Anyang 431-070, South Korea.
Taek Geun
TG
Ohk
Ki-Yeon
KY
Yoo
Seung Min
SM
Park
Bich Na
BN
Shin
In Hye
IH
Kim
Joon Ha
JH
Park
Hee Cheol
HC
Ahn
Young Joo
YJ
Lee
Myong Jo
MJ
Kim
Tae Young
TY
Kim
Moo-Ho
MH
Won
Jun Hwi
JH
Cho
D000818:Animals; D003342:Corpus Striatum / Q000737:chemistry / Q000378:metabolism / Q000473:pathology*; D005452:Fluoresceins; D005456:Fluorescent Dyes / Q000378:metabolism; D005849:Gerbillinae; D005911:Gliosis / Q000378:metabolism / Q000473:pathology*; D002546:Ischemic Attack, Transient / Q000378:metabolism / Q000473:pathology*; D008297:Male; D009043:Motor Activity / Q000502:physiology; D009474:Neurons / Q000737:chemistry / Q000378:metabolism / Q000473:pathology*; D009930:Organic Chemicals / Q000378:metabolism; D013997:Time Factors
D005452:Fluoresceins; D005456:Fluorescent Dyes; D009930:Organic Chemicals; C435731:fluoro jade