22 December 2014 : Original article
Med Sci Monit 2014; 20:2759-2766
BACKGROUND: Neuronal cells are vulnerable to many stresses that can cause apoptosis. Reprogramming of fibroblasts into induced neural stem cells (iNSCs) is a potentially unlimited source of neurons. Discovering agents that can provide neuronal protection against these apoptotic stimuli is important for developing therapeutic strategies for various brain diseases.
MATERIAL AND METHODS: We investigated the therapeutic effects of iNSCs against apoptosis activator II (AAII)-induced apoptosis of cortical neuronal cells. Apoptosis was confirmed by double immunocytochemistry with NeuN and 4’,6-diamidino-2-phenylindole using terminal deoxynucleotidyl transferase-mediated digoxigenin-dUTP-biotin nick-end labeling. We performed Western blot analyses for activated caspase-3, Bcl-2, phosphorylated Akt, and phosphorylated extracellular signal-regulated protein kinase (ERK). The level of vascular endothelial growth factor (VEGF) was analyzed using enzyme-linked immunosorbent assays (P<0.05).
RESULTS: Cortical neuronal cells cultured with iNSCs had fewer apoptotic cells than those cultured without iNSCs. We found that cells cultured with iNSCs had a significantly lower caspase-3 level and a significantly higher Bcl-2 level than cells cultured without iNSCs. Cells cultured with iNSCs had higher VEGF levels than cells cultured without iNSCs. The levels of phosphorylated Akt and phosphorylated ERK were significantly higher in cells cultured with iNSCs than in cells cultured without iNSCs.
CONCLUSIONS: Our findings suggest that iNSCs activate Akt and ERK, which are associated with the inhibition of neuronal apoptosis. Thus, treatment with iNSCs may help reduce neuronal loss in brain disease. Further studies aimed at proving this hypothesis might help establish therapeutic agents that can prevent neuronal cell death and help cure neurodegenerative diseases.
Keywords: Cell Differentiation, Cell Lineage, Cerebral Cortex - cytology, Coculture Techniques, Extracellular Signal-Regulated MAP Kinases - metabolism, Fibroblasts - cytology, In Situ Nick-End Labeling, Neural Stem Cells - cytology, Neurons - cytology, Phosphorylation, Proto-Oncogene Proteins c-akt - metabolism
01 September 2023 : EditorialEditorial: A Rapid Global Increase in COVID-19 is Due to the Emergence of the EG.5 (Eris) Subvariant of Omicron SARS-CoV-2
Med Sci Monit 2023; 29:e942244
27 Sep 2023 : Laboratory ResearchEnhanced Proliferation and Adhesion Marker Gene Expression in Fibroblast Cells: Evaluating the Efficacy of ...
Med Sci Monit In Press; DOI: 10.12659/MSM.941641
26 Sep 2023 : Clinical ResearchHypothalamic Injury and Clinical Outcomes in Patients with Post-Traumatic Hyponatremia: A Diffusion Tensor ...
Med Sci Monit In Press; DOI: 10.12659/MSM.942397
26 Sep 2023 : Clinical ResearchPsychometric Properties of the Polish Version of the FACIT-Sp-12: Assessing Spiritual Well-Being Among Pati...
Med Sci Monit In Press; DOI: 10.12659/MSM.941769
Most Viewed Current Articles
13 Nov 2021 : Clinical ResearchAcceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...
Med Sci Monit 2021; 27:e932788
30 Dec 2021 : Clinical ResearchRetrospective Study of Outcomes and Hospitalization Rates of Patients in Italy with a Confirmed Diagnosis o...
Med Sci Monit 2021; 27:e935379
08 Mar 2022 : Review articleA Review of the Potential Roles of Antioxidant and Anti-Inflammatory Pharmacological Approaches for the Man...
Med Sci Monit 2022; 28:e936292