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2014 ; 270
(ä): 40-7
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Administration of S-methyl-L-thiocitrulline protects against brain injuries after
intracerebral hemorrhage
#MMPMID24726981
Lu A
; Wagner KR
; Broderick JP
; Clark JF
Neuroscience
2014[Jun]; 270
(ä): 40-7
PMID24726981
show ga
Although intracerebral hemorrhage (ICH) increases the level of glutamate in the
perihematomal area and cerebral spinal fluid (CSF) in the ICH acute phase, it is
unclear whether elevated glutamate activates neuronal nitric oxide synthase
(nNOS) in the ICH brain and whether nNOS is an important target for ICH
treatment. Here, we assessed the role of the nNOS inhibitor
S-methyl-l-thiocitrulline (SMTC) in the activity of NADPH-d and ICH-induced brain
injuries. An autologous blood intracerebral infusion model in male rats was used.
All of the rats were sacrificed 24h after ICH. ICH increased NADPH-d activity in
the striatum. Administering SMTC 3h after ICH decreased the activity of NADH-d
(p<0.05 vs. the ICH group). The activation of gelatinolytic enzymes in the
perihematomal region of the striatum was reduced by SMTC treatment (p<0.01, vs.
the ICH group). The loss of laminin- and occludin-stained vessels was significant
in perihematomal regions after 24h of ICH and was significantly attenuated by the
administration of SMTC (p<0.01 for laminin, p<0.05 for occluding, compared with
the ICH group). Neuronal death and neurological deficits after ICH were also
decreased in SMTC treatment rats (p<0.01, vs. the ICH group). The results suggest
that the administration of the nNOS inhibitor SMTC after ICH protects against
ICH-induced brain injuries and improves neurological function.