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Huperzine A derivative M3 protects PC12 cells against sodium nitroprusside-induced apoptosis
Na Ning1, Jin-feng Hu, Yu-he Yuan
1State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing, China.
Aim:
To investigate the effects of M3, a derivative of huperzine A, on the apoptosis induced by sodium nitroprusside (SNP) in PC12 cells.
Methods:
Cell viability was detected using MTT method. Apoptosis was examined with annexin V/prodium iodide (PI) stain. The levels of reactive oxygen species (ROS) were measured using fluorophotometric quantitation. The amount of malonaldehyde (MDA) was determined with MDA detection kits. The expression of caspase-3 and Hsp70 were analyzed using Western blotting.
Results:
Exposure of PC12 cells to SNP (200 μmol/L) for 24 h decreased the cell viability to 69.0% of that in the control group. Pretreatment with M3 (10 μmol/L) or huperzine A (10 μmol/L) significantly protected the cells against SNP-induced injury and apoptosis; the ratio of apoptotic bodies in PC12 cells was decreased from 27.3% to 15.0%. Pretreatment with M3 (10 μmol/L) significantly decreased ROS and MDA levels, and increased the expression of Hsp70 in the cells. Quercetin (10 μmol/L) blocked the protective effect of M3, while did not influence on that of huperzine A.
Conclusion:
M3 protects PC12 cells against SNP-induced apoptosis, possible due to ROS scavenging and Hsp70 induction.
Insights
M3, a huperzine A derivative, protects PC12 cells from sodium nitroprusside-induced apoptosis by reducing oxidative stress and increasing heat shock protein 70. This compound shows potential for neuroprotection.
Area of Science:
- Neuroscience
- Cell Biology
- Pharmacology
Background:
- Sodium nitroprusside (SNP) induces apoptosis in PC12 cells, a common model for neuronal injury.
- Huperzine A derivatives are explored for neuroprotective properties.
Purpose of the Study:
- To evaluate the protective effects of M3, a huperzine A derivative, against SNP-induced apoptosis in PC12 cells.
- To elucidate the mechanisms underlying M3's neuroprotection, focusing on oxidative stress and heat shock protein expression.
Main Methods:
- PC12 cell viability assessed via MTT assay.
- Apoptosis quantified using Annexin V/propidium iodide staining.
- Reactive oxygen species (ROS) and malonaldehyde (MDA) levels measured.
- Western blotting used to analyze caspase-3 and Hsp70 expression.
Main Results:
- SNP treatment significantly reduced PC12 cell viability and increased apoptosis.
- M3 pretreatment (10 μmol/L) markedly protected cells against SNP-induced apoptosis, decreasing apoptotic bodies from 27.3% to 15.0%.
- M3 significantly reduced ROS and MDA levels and upregulated Hsp70 expression, while quercetin blocked M3's protective effect.
Conclusions:
- M3 demonstrates significant neuroprotective effects against SNP-induced apoptosis in PC12 cells.
- The protective mechanism of M3 involves ROS scavenging and Hsp70 induction.
- M3's distinct interaction with quercetin suggests a specific protective pathway compared to huperzine A.
