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Novel Experimental Therapeutic Approaches in Glioma-New Hydrazide-Hydrazones as Chemical Agents Sensitizing
Dorota Natorska-Chomicka1, Monika Gawrońska-Grzywacz1, Paweł Patrejko2
1Chair and Department of Toxicology, Faculty of Pharmacy, Medical University of Lublin, 8B Jaczewskiego Str., 20-090 Lublin, Poland.
Abstract:
Gliomas are highly aggressive tumors of the nervous system and remain difficult to treat with currently available therapeutic approaches. Due to their poor prognosis and resistance to standard treatments, there is a growing need for novel strategies, including therapies based on the combined use of radiotherapy and chemotherapy. The aim of this study was to evaluate the potential of newly synthesized hydrazide-hydrazones to sensitize glioblastoma tumor cells to X-ray irradiation. Two novel hydrazide-hydrazones of 5-bromo-2-iodobenzoic acid (3 and 4) were synthesized on the basis of condensation reaction. The chemical structure of obtained compounds was established with the use of IR, 1H NMR and 13C NMR spectroscopy. In vitro biological studies demonstrated that the radiosensitizing effect of the tested hydrazide-hydrazones was strongly dependent on both compound concentration and glioblastoma cell line. In LN-229 cells, compound 3 at 164 μM combined with 2 Gy irradiation reduced cell viability by 65% and increased the subG1 population, indicating enhanced cytotoxicity and induction of cell death. Similarly, compound 4 at 242 μM combined with 2-5 Gy irradiation decreased LN-229 cell viability by more than 50% and promoted cell cycle arrest and apoptosis, whereas both compounds showed limited or even proliferative effects in U-87MG cells, highlighting the importance of tumor-specific biological characteristics in determining treatment response.
Insights
Newly synthesized hydrazide-hydrazones show potential as radiosensitizers for glioblastoma (a type of brain tumor). Compound 3 and 4 enhanced X-ray therapy effectiveness in specific glioblastoma cell lines, indicating a promising new avenue for cancer treatment.
Area of Science:
- Oncology
- Medicinal Chemistry
- Radiotherapy
Background:
- Gliomas are aggressive brain tumors with poor prognosis and resistance to conventional therapies.
- Novel therapeutic strategies, including combined radiotherapy and chemotherapy, are urgently needed.
- Radiosensitizers can enhance the efficacy of radiation treatment.
Purpose of the Study:
- To synthesize and evaluate novel hydrazide-hydrazones as potential radiosensitizers for glioblastoma cells.
- To investigate the effect of these compounds in combination with X-ray irradiation.
- To assess the impact of compound concentration and glioblastoma cell line on radiosensitizing effects.
Main Methods:
- Synthesis of two novel hydrazide-hydrazones (compounds 3 and 4) derived from 5-bromo-2-iodobenzoic acid via condensation reaction.
- Structural elucidation using IR, 1H NMR, and 13C NMR spectroscopy.
- In vitro biological studies assessing cell viability, cell cycle arrest, and apoptosis in glioblastoma cell lines (LN-229 and U-87MG) treated with compounds and X-ray irradiation.
Main Results:
- Compound 3 (164 μM) combined with 2 Gy irradiation significantly reduced LN-229 cell viability by 65% and increased subG1 population, indicating enhanced cytotoxicity and apoptosis.
- Compound 4 (242 μM) with 2-5 Gy irradiation decreased LN-229 cell viability by over 50%, inducing cell cycle arrest and apoptosis.
- Both compounds showed limited or proliferative effects in U-87MG cells, suggesting cell-line-specific responses.
Conclusions:
- The synthesized hydrazide-hydrazones exhibit radiosensitizing properties against specific glioblastoma cell lines.
- Treatment response is dependent on compound concentration, irradiation dose, and intrinsic tumor cell characteristics.
- These compounds represent potential candidates for novel glioblastoma treatment strategies, warranting further investigation.