GOLPH3 inhibits glioma cell apoptosis through the JNK signaling pathway
Shao Xie1,2, Jiahai Ding2, Zhaohao Wang3
1Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.
Background:
Glioma, a primary intracranial tumor, is marked by high rates of mortality and disability, making it a significant health concern. Understanding the molecular mechanisms underlying glioma initiation and progression and identifying potential therapeutic targets for gene therapy are crucial for improving patient outcomes. Golgi phosphoprotein 3 (GOLPH3), predominantly localized at the trans-Golgi network, has been implicated in the pathogenesis of various cancers. However, its precise role in glioma progression remains under active investigation.
Methods:
To elucidate the function of GOLPH3, U87 glioma cells were transfected with GOLPH3-specific small interfering RNA (siRNA) to suppress its expression. An in vivo glioma model was generated by implanting GOLPH3-knockdown U87 cells into nude mice. Apoptosis was assessed using flow cytometry, immunofluorescence staining, TUNEL assays, and Western blotting. The activation of the JNK signaling pathway was evaluated by analyzing the phosphorylation levels of JNK and c-Jun through Western blotting.
Results:
Downregulation of GOLPH3 in U87 glioma cells significantly enhanced apoptosis, as evidenced by increased levels of cleaved caspase-3 and higher apoptosis rates. Furthermore, GOLPH3 knockdown led to the activation of the JNK signaling pathway, as indicated by elevated phosphorylation of JNK and c-Jun. In vivo, suppression of GOLPH3 expression inhibited tumor growth and increased apoptosis within the tumor microenvironment.
Conclusion:
These findings suggest that GOLPH3 might play a pivotal role in regulating apoptosis in malignant glioma cells via the JNK signaling pathway. Thus, GOLPH3 may represent a promising therapeutic target for glioma treatment.
Insights
Golgi phosphoprotein 3 (GOLPH3) knockdown increases glioma cell apoptosis via the JNK pathway. Suppressing GOLPH3 inhibits tumor growth, offering a potential therapeutic target for glioma treatment.
Area of Science:
- Molecular Biology
- Oncology
- Cancer Research
Background:
- Glioma, a primary intracranial tumor, presents significant mortality and disability challenges.
- Understanding glioma's molecular mechanisms and identifying therapeutic targets are critical for improved patient outcomes.
- Golgi phosphoprotein 3 (GOLPH3) is implicated in various cancers, but its role in glioma progression requires further investigation.
Purpose of the Study:
- To elucidate the function of Golgi phosphoprotein 3 (GOLPH3) in glioma progression.
- To investigate the role of GOLPH3 in regulating apoptosis and the JNK signaling pathway in glioma cells.
- To evaluate GOLPH3 as a potential therapeutic target for glioma gene therapy.
Main Methods:
- GOLPH3 expression was suppressed in U87 glioma cells using small interfering RNA (siRNA).
- An in vivo glioma model was established by implanting GOLPH3-knockdown U87 cells into nude mice.
- Apoptosis was assessed via flow cytometry, immunofluorescence, TUNEL assays, and Western blotting; JNK pathway activation was evaluated by analyzing JNK and c-Jun phosphorylation.
Main Results:
- Downregulation of GOLPH3 significantly enhanced apoptosis in U87 glioma cells, indicated by increased cleaved caspase-3 and higher apoptosis rates.
- GOLPH3 knockdown activated the JNK signaling pathway, evidenced by elevated phosphorylation of JNK and c-Jun.
- In vivo, GOLPH3 suppression inhibited tumor growth and increased apoptosis within the tumor microenvironment.
Conclusions:
- GOLPH3 plays a pivotal role in regulating apoptosis in malignant glioma cells, potentially through the JNK signaling pathway.
- GOLPH3 represents a promising therapeutic target for glioma treatment.
- Further research into GOLPH3's mechanisms could lead to novel gene therapy strategies for glioma.
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