scholarly journals c-Jun N-terminal kinase pathway activation in human and experimental traumatic brain injury: neuroprotective effects of its inhibition

Critical Care ◽  
2008 ◽  
Vol 12 (Suppl 2) ◽  
pp. P123
Author(s):  
F Ortolano ◽  
ER Zanier ◽  
A Colombo ◽  
A Sclip ◽  
L Longhi ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Neuroprotective Effects ◽  
Pathway Activation ◽  
Kinase Pathway ◽  
Experimental Traumatic Brain Injury

scholarly journals Comparative Neuroprotective Effects of Cyclosporin a and NIM811, a Nonimmunosuppressive Cyclosporin a Analog, following Traumatic Brain Injury

2008 ◽  
Vol 29 (1) ◽  
pp. 87-97 ◽  
Author(s):  
Lamin Han Mbye ◽  
Indrapal N Singh ◽  
Kimberly M Carrico ◽  
Kathryn E Saatman ◽  
Edward D Hall
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Cyclosporin A ◽  
Mitochondrial Dysfunction ◽  
Motor Function ◽  
Neurological Dysfunction ◽  
Neuroprotective Effects ◽  
Function Impairment ◽  
Calcineurin Inhibition ◽  
Experimental Traumatic Brain Injury

Earlier experiments have shown that cyclosporin A (CsA) and its non-calcineurin inhibitory analog NIM811 attenuate mitochondrial dysfunction after experimental traumatic brain injury (TBI). Presently, we compared the neuroprotective effects of previously determined mitochondrial protective doses of CsA (20 mg/kg intraperitoneally) and NIM811 (10 mg/kg intraperitoneally) when administered at 15 mins postinjury in preventing cytoskeletal (α-spectrin) degradation, neuro-degeneration, and neurological dysfunction after severe (1.0 mm) controlled cortical impact (CCI) TBI in mice. In a first set of experiments, we analyzed calpain-mediated α-spectrin proteolysis at 24 h postinjury. Both NIM811 and CsA significantly attenuated the increased α-spectrin breakdown products observed in vehicle-treated animals ( P < 0.005). In a second set of experiments, treatment of animals with either NIM811 or CsA at 15 mins and again at 24 h postinjury attenuated motor function impairment at 48 h and 7 days ( P < 0.005) and neurodegeneration at 7 days postinjury ( P < 0.0001). Delayed administration of NIM811 out to 12 h was still able to significantly reduce α-spectrin degradation. These results show that the neuroprotective mechanism of CsA involves maintenance of mitochondrial integrity and that calcineurin inhibition plays little or no role because the non-calcineurin inhibitory analog, NIM811, is as effective as CsA.

scholarly journals Neuroprotective Effects of Geranylgeranylacetone in Experimental Traumatic Brain Injury

2013 ◽  
Vol 33 (12) ◽  
pp. 1897-1908 ◽  
Author(s):  
Zaorui Zhao ◽  
Alan I Faden ◽  
David J Loane ◽  
Marta M Lipinski ◽  
Boris Sabirzhanov ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Enhanced Recovery ◽  
Apoptotic Cell ◽  
Neuronal Loss ◽  
Lesion Size ◽  
Neuroprotective Effects ◽  
Stroke Models ◽  
Neuroprotective Actions ◽  
Experimental Traumatic Brain Injury

Geranylgeranylacetone (GGA) is an inducer of heat-shock protein 70 (HSP70) that has been used clinically for many years as an antiulcer treatment. It is centrally active after oral administration and is neuroprotective in experimental brain ischemia/stroke models. We examined the effects of single oral GGA before treatment (800 mg/kg, 48 hours before trauma) or after treatment (800 mg/kg, 3 hours after trauma) on long-term functional recovery and histologic outcomes after moderate-level controlled cortical impact, an experimental traumatic brain injury (TBI) model in mice. The GGA pretreatment increased the number of HSP70+ cells and attenuated posttraumatic α-fodrin cleavage, a marker of apoptotic cell death. It also improved sensorimotor performance on a beam walk task; enhanced recovery of cognitive/affective function in the Morris water maze, novel object recognition, and tail-suspension tests; and improved outcomes using a composite neuroscore. Furthermore, GGA pretreatment reduced the lesion size and neuronal loss in the hippocampus, cortex, and thalamus, and decreased microglial activation in the cortex when compared with vehicle-treated TBI controls. Notably, GGA was also effective in a posttreatment paradigm, showing significant improvements in sensorimotor function, and reducing cortical neuronal loss. Given these neuroprotective actions and considering its longstanding clinical use, GGA should be considered for the clinical treatment of TBI.

Neuroprotective effects of Hemocoagulase Agkistrodon on experimental traumatic brain injury

2021 ◽  
Vol 170 ◽  
pp. 1-10
Author(s):  
Jingshu Tang ◽  
Yuying Kang ◽  
Longjian Huang ◽  
Xinhong Feng ◽  
Lei Wu ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Neuroprotective Effects ◽  
Experimental Traumatic Brain Injury
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