Abstract:
SUBJECT:Recent data demonstrated potent neuroprotective effects of growth hormones such as granulocyte colony-stimulating factor (G-CSF) after focal cerebral ischaemia. In order to assess possible effects of intracerebroventricular application of G-CSF on cerebral recovery after cardiac arrest (CA) in rats, neurological testing and histological analyses were performed. INTERVENTIONS:After 6 min of electrically induced CA, rats were resuscitated (CPR) and divided into two groups (G-CSF vs. placebo) with two different reperfusion times (7 and 14 days). G-CSF (3.84 microg) or placebo was applied 30 min after restoration of spontaneous circulation (ROSC). At 24h, 3, 7, 10 and 14 days, behavioural neurological testing was done (tape removal test, TRT). Neuronal degeneration of the hippocampal CA-1 sector was analyzed by TUNEL- and Nissl-staining. RESULTS:Before CA all animals passed the TRT (G-CSF 7 [4-12] s, placebo 9 [6-10] s). After ROSC both groups showed a clear neurological deficit (24h: G-CSF and placebo 180 [180-180] s), that improved with ongoing reperfusion times, without reaching baseline values (14 days: G-CSF 25 [21-59] s, placebo 34 [14-175] s). Survival rates did not differ between the groups. All animals showed massive neurodegeneration histologically without any differences between the groups 7 days after CA (TUNEL-positive: G-CSF 63.2 [53.8-72.1], placebo 72.6 [66.6-82.7]; Nissl-positive: G-CSF 2.5 [1.8-3.4], placebo 2.8 [2.0-5.1]). At 14 days, TUNEL-staining revealed no differences (G-CSF 45.2 [35.0-60.0], placebo 56.0 [37.6-63.4]), while G-CSF treatment led to fewer Nissl-positive neurons (G-CSF 1.5 [1.2-2.2], placebo 3.1 [2.1-4.2]; p=0.011). CONCLUSIONS:Despite promising experimental data concerning focal cerebral ischaemia, in this model of 6 min of normothermic CA no beneficial effects of G-CSF application could be demonstrated by behavioural testing and histological analyses of the hippocampal CA-1 sector.
journal_name
Resuscitationjournal_title
Resuscitationauthors
Popp E,Rabsahl T,Schneider A,Russ N,Spöhr F,Vogel P,Böttiger BW,Teschendorf Pdoi
10.1016/j.resuscitation.2009.01.003subject
Has Abstractpub_date
2009-04-01 00:00:00pages
478-83issue
4eissn
0300-9572issn
1873-1570pii
S0300-9572(09)00011-2journal_volume
80pub_type
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