Turkish Neurosurgery 2023 , Vol 33 , Num 6
JNK Inhibition Modulates the Cytoskeleton, Hypoxia, and Neurogenesis on the Protein Level in Glioblastoma Cells and Astrocytes: An Immunofluorescence Study
Can KOSE1,Serap USLU2,Duygu CALIK-KOCATURK3,Berrin OZDIL4,Huseyin AKTUG4
1Health Sciences University, Izmir Tepecik Education and Research Hospital, Department of IVF Unit Izmir, Turkey
2Istanbul Medeniyet University, Department of Histology and Embryology, Istanbul, Turkey
3Ismail Fehmi Cumalioglu City Hospital, Tekirdag, Turkey
4Ege University, Faculty of Medicine, Department of Histology and Embryology, Izmir, Turkey
5Suleyman Demirel University, Faculty of Medicine, Department of Histology and Embryology, Isparta, Turkey
DOI : 10.5137/1019-5149.JTN.38289-22.1 AIM: To evaluate the effects of c-Jun N-terminal kinase (JNK) inhibition and signal blocking on hypoxia (hypoxia-inducible factor 1-alpha (HIF-1α)), differentiation and neurogenesis (bone morphogenetic protein (BMP4)), and the cytoskeleton (F-actin) in glioblastoma multiforme cells (GBMCs).

MATERIAL and METHODS: We evaluated the differences between GBMCs and astrocytes in terms of the abovementioned parameters and assessed them with the aim of studying human GBMCs (U-87 MG) and astrocytes (SVG p12). The cells were exposed to different doses of the JNK inhibitor, SP600125, for 24, 48, and 72 hours. HIF-1α, BMP4, and F-actin expressions were evaluated using immunofluorescence image analysis.

RESULTS: The half-maximal inhibitory concentration value for SP600125 was determined to be 10 μM at 24 hours of exposure. After SP600125 administration, elevated levels of HIF-1α and BMP4 were detected in GBMCs and astrocytes. F-actin level only increased in GBMCs after SP600125 administration.

CONCLUSION: JNKs are important for cell proliferation, differentiation, survival, and death; thus, research on JNKs has become important for the treatment of many human diseases, especially brain tumors, Parkinson's disease, and Alzheimer's disease. The results of this study involving immunofluorescence techniques should be investigated and supported by studies that involve comprehensive molecular techniques. Keywords : c-Jun N-terminal kinases, Glioblastoma multiforme, HIF-1α, BMP4, F-actin

Corresponding author : Huseyin AKTUG, huseyin.aktug@ege.edu.tr