Related Experiment Videos
SENP3 Exacerbates Spinal Cord Injury by Increasing H6PD deSUMOylation to Promote Glycolysis
Ni Jiang1,2, Yun Tang1, Yu-Chang Gui1
1Department of Rehabilitation Medicine, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China.
Summary
H6PD upregulation aids recovery after spinal cord injury (SCI). Its downregulation by SENP3 worsens neurological deficits and neuronal damage by disrupting the SIRT1/HIF-1α pathway.
Area of Science:
- Neuroscience
- Biochemistry
- Cell Biology
Background:
- Spinal cord injury (SCI) causes lasting neurological deficits with limited treatments.
- Understanding molecular mechanisms in SCI is crucial for developing new therapies.
Purpose of the Study:
- To investigate the role and regulation of H6PD in spinal cord injury.
- To explore H6PD's potential as a therapeutic target for SCI.
Main Methods:
- Assessed functional recovery (BBB scores, inclined plane, rotarod tests) and spinal cord pathology (HE, Nissl staining).
- Measured cellular metabolism (ECAR, OCR), oxidative stress (ROS, MDA, GSH, SOD), and apoptosis.
- Investigated protein interactions and SUMOylation using Co-IP; analyzed H6PD and SENP3 interactions.
Main Results:
- H6PD was upregulated in SCI rats, and its knockdown worsened neurological deficits and tissue damage.
- H6PD knockdown in neurons increased glycolysis, oxidative damage, and apoptosis.
- SENP3 interacted with H6PD, promoting its deSUMOylation and reducing protein stability.
- SENP3 aggravated neuronal injury and metabolic dysfunction in SCI by downregulating H6PD and affecting the SIRT1/HIF-1α pathway.
Conclusions:
- H6PD plays a protective role in spinal cord injury.
- SENP3 exacerbates SCI by destabilizing H6PD, leading to metabolic dysfunction and neuronal injury.
- Targeting the SENP3/H6PD/SIRT1/HIF-1α axis may offer a therapeutic strategy for SCI.
Related Concept Videos
01:25Secondary Spinal Cord Injury llI: Pathophysiology
Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...
01:29Hepatic Encephalopathy
DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic shunting—including...
01:14Spinal Cord Injury ll: Pathophysiology
Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...