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Enhanced apoptosis of soft tissue sarcoma cells with chemotherapy: A potential new approach using TRAIL
M Clayer1, S Bouralexis, A Evdokiou
1The Queen Elizabeth Hospital, Adelaide, Australia.
Abstract:
Soft tissue sarcomas are less responsive to conventional chemotherapy when compared to bone sarcomas. We investigated the possibility of enhancing the efficacy of chemotherapy by utilising the recently identified cytokine, tumour necrosis factor-related apoptosis-inducing ligand (TRAIL/Apo2L) in combination with standard chemotherapeutic agents. Fresh human soft tissue sarcomas (rhabdomyosarcoma, fibrosarcoma, malignant fibrous histiocytoma) were obtained at biopsy and dispersed tumour cells were incubated in cell culture with standard cytotoxic agents, either as single agents or in combination with TRAIL. The chemotherapeutic agents were, at best, moderately effective, in terms of induction of cellular apoptosis, although the fibrosarcoma was completely unresponsive to all single agents. TRAIL alone had no effect on any sarcoma cell culture. In contrast, the addition of TRAIL and drug together produced a significant increase in sarcoma cell apoptosis, with TRAIL and doxorubicin the most effective combination.
Insights
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) combined with chemotherapy significantly increased soft tissue sarcoma cell death. TRAIL and doxorubicin showed the most promising results in enhancing chemotherapy efficacy.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Soft tissue sarcomas exhibit limited responsiveness to conventional chemotherapy compared to bone sarcomas.
- Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL/Apo2L) is a cytokine that induces apoptosis.
- Investigating novel therapeutic combinations is crucial for improving sarcoma treatment outcomes.
Purpose of the Study:
- To evaluate the potential of combining TRAIL with standard chemotherapeutic agents to enhance the efficacy against soft tissue sarcomas.
- To assess the synergistic effects of TRAIL and chemotherapy on inducing apoptosis in various human soft tissue sarcoma cell cultures.
Main Methods:
- Human soft tissue sarcoma samples (rhabdomyosarcoma, fibrosarcoma, malignant fibrous histiocytoma) were obtained at biopsy.
- Dispersed tumor cells were cultured and treated with standard cytotoxic agents alone or in combination with TRAIL.
- Cellular apoptosis was measured to determine treatment efficacy.
Main Results:
- Standard chemotherapeutic agents demonstrated moderate efficacy in inducing apoptosis, with fibrosarcoma being unresponsive to single agents.
- TRAIL alone did not induce apoptosis in any sarcoma cell culture.
- Combination therapy of TRAIL with chemotherapeutic agents significantly increased sarcoma cell apoptosis.
Conclusions:
- TRAIL in combination with chemotherapy can enhance the apoptotic response in soft tissue sarcomas.
- The combination of TRAIL and doxorubicin was the most effective in inducing apoptosis among the tested agents.
- This study suggests a potential therapeutic strategy for improving soft tissue sarcoma treatment by combining TRAIL with chemotherapy.
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