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Expansion of Embryonic and Adult Neural Stem Cells by In Utero Electroporation or Viral Stereotaxic Injection
Published on: October 6, 2012
Studies on the use of NE-4C embryonic neuroectodermal stem cells for targeting brain tumour
Kornél Demeter1, Anita Zádori, Viktor A Agoston
1Institute of Experimental Medicine of Hungarian Academy of Sciences, Laboratory of Neural Cell Biology, Szigony u. 43, H-1083 Budapest, Hungary.
Abstract:
Neural stem cells were suggested to migrate to and invade intracranial gliomas. In the presented studies, interactions of NE-4C embryonic neural stem cells were investigated with C6 and Gl261, LL and U87, glioblastoma cells or with primary astrocytes. Glioma-derived humoral factors did not influence the proliferation of stem cells. NE-4C-derived humoral factors did not alter the proliferation of Gl261 and U87 cells, but increased the mitotic activity of C6 cells and that of astrocytes. In chimera-aggregates, all types of glioma cells co-aggregated with astrocytes, but most of them segregated from stem cells. Complete intercalation of stem and tumour cells was detected only in chimera-aggregates of Gl261 glioma and NE-4C cells. If mixed suspensions of NE-4C and Gl261 cells were injected into the brain, stem cells survived and grew inside the tumour mass. NE-4C stem cells, however, did not migrate towards the tumour, if implanted near to Gl261 tumours established in the adult mouse forebrain. The observations indicate that not all types of stem cells could be used for targeting all sorts of brain tumours.
Insights
Neural stem cells (NSCs) interactions with brain tumors varied. NE-4C NSCs integrated with Gl261 glioma cells, suggesting specific stem cell and tumor type compatibility for brain tumor targeting.
Area of Science:
- Neuroscience
- Stem Cell Biology
- Oncology
Background:
- Neural stem cells (NSCs) show potential for brain tumor therapy.
- Understanding NSC-glioma interactions is crucial for developing targeted therapies.
Purpose of the Study:
- To investigate the interactions between NE-4C embryonic neural stem cells and various glioma cell lines (C6, Gl261, LL, U87) and primary astrocytes.
- To determine the potential of NSCs for targeting and infiltrating intracranial gliomas.
Main Methods:
- Co-aggregation assays to assess cell-cell interactions.
- In vitro proliferation assays to evaluate the effects of cell-derived humoral factors.
- In vivo studies involving the injection of mixed cell suspensions into mouse brains.
Main Results:
- Glioma-derived factors did not affect NSC proliferation.
- NE-4C cells increased mitotic activity in C6 glioma cells and astrocytes, but not in Gl261 or U87 cells.
- Complete intercalation was observed only between Gl261 glioma and NE-4C stem cells.
- In vivo, NE-4C cells survived and grew within Gl261 tumors when co-injected, but did not migrate to established tumors.
Conclusions:
- The interaction and potential therapeutic application of neural stem cells with brain tumors are highly specific to the cell types involved.
- Not all neural stem cells are suitable for targeting all types of brain tumors.
- Further research is needed to elucidate the mechanisms governing NSC-glioma interactions for effective cell-based therapies.
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