Yisi LIAO, Jiashang HUANG, Yanfeng XIE, et al. Activation of PDGFR and ROS in early brain injury in rats after subarachnoid hemorrhage[J]. Journal of Army Medical University, 2022, 44(12): 1243-1248.
DOI:
Yisi LIAO, Jiashang HUANG, Yanfeng XIE, et al. Activation of PDGFR and ROS in early brain injury in rats after subarachnoid hemorrhage[J]. Journal of Army Medical University, 2022, 44(12): 1243-1248. DOI: 10.16016/j.2097-0927.202202166.
Activation of PDGFR and ROS in early brain injury in rats after subarachnoid hemorrhage
To investigate the effects of inhibiting the activation of platelet-derived growth factor receptor (PDGFR) and reactive oxygen species (ROS) on early brain damage (EBI) after subarachnoid hemorrhage (SAH)
and explore their possible acting mechanism in the process.
Methods
2
Adult male SD rats were randomly divided into sham operation group
SAH group
PDGF receptor inhibition group and ROS inhibition group
with 12 rats in each group. The rat model of SAH was established by intravascular puncture. In 1 h later
the rats in the treatment groups were injected with corresponding drugs by intraperitoneal injection. At 24 and 48 h after operation
animal mortality and body weight changes were observed
brain dysfunction was evaluated with neurobehavioral assessment
and brain water content was measured to evaluate blood-brain barrier permeability. Western blot analysis was used to detect the changes of PDGFR and phosphorylated PDGFR and the expression of p-JNK and p-MMP-9 after SAH. The oxidation products of lipids and proteins
malondialdehyde (MDA) and ROS were also detected.
Results
2
Both inhibiting the activation of PDGFR and scavenging ROS reduced brain water content after SAH (
P
<
0.05)
decreased the expression of MMP-9 (
P
<
0.05)
improved the neurological function score (
P
<
0.05)
reduced the production of ROS and MDA (
P
<
0.05)
and decreased the phosphorylation of JNK and c-Jun. Inhibiting the generation of ROS suppressed the activation of PDGFR to a certain extent
and inhibiting the activation of PDGFR also reduced the generation of ROS to a certain extent (
P
<
0.05).
Conclusion
2
After SAH in rats
ROS is involved in the activation of PDGFR
and its activation can further aggravate free radical damage. The JNK-MMP-9 pathway is indeed an important pathway that causes blood-brain barrier disruption in EBI.
关键词
Keywords
references
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