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Updated: Aug 23, 2026

Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo
Published on: February 6, 2015
Chemotherapy Resistance Mechanisms in Advanced Skin Cancer
Bhuvanesh Sukhlal Kalal1, Dinesh Upadhya2, Vinitha Ramanath Pai3
1Department of Biochemistry, Yenepoya Medical College, Mangaluru, India; Yenepoya Research Centre, Yenepoya University, Mangaluru, India.
Abstract:
Melanoma is a most dangerous and deadly type of skin cancer, and considered intrinsically resistant to both radiotherapy and chemotherapy. It has become a major public health concern as the incidence of melanoma has been rising steadily over recent decades with a 5-year survival remaining less than 5%. Detection of the disease in early stage may be curable, but late stage metastatic disease that has spread to other organs has an extremely poor prognosis with a median survival of less than 10 months. Since metastatic melanoma is unresponsive to therapy that is currently available, research is now focused on different treatment strategies such as combinations of surgery, chemotherapy and radiotherapy. The molecular basis of resistance to chemotherapy seen in melanoma is multifactorial; defective drug transport system, altered apoptotic pathway, deregulation of apoptosis and/or changes in enzymatic systems that mediate cellular metabolic machinery. Understanding of alterations in molecular processes involved in drug resistance may help in developing new therapeutic approaches to treatment of malignant melanoma.
Insights
Malignant melanoma, a deadly skin cancer, is resistant to standard treatments. Understanding its molecular resistance mechanisms is key to developing new therapies for this growing public health concern.
Area of Science:
- Oncology
- Dermatology
- Cancer Biology
Background:
- Melanoma is an aggressive skin cancer with rising incidence and poor survival rates, especially in advanced stages.
- The disease is intrinsically resistant to radiotherapy and chemotherapy, posing a significant public health challenge.
- Late-stage metastatic melanoma has a very poor prognosis, with current therapies offering limited efficacy.
Purpose of the Study:
- To investigate the molecular underpinnings of chemotherapy resistance in melanoma.
- To identify potential therapeutic targets for overcoming treatment unresponsiveness in malignant melanoma.
- To explore novel treatment strategies for advanced melanoma.
Main Methods:
- Review of existing literature on melanoma resistance mechanisms.
- Analysis of molecular pathways involved in drug resistance, including drug transport, apoptosis, and cellular metabolism.
- Exploration of potential combination therapies involving surgery, chemotherapy, and radiotherapy.
Main Results:
- Melanoma's resistance to chemotherapy is multifactorial, involving defects in drug transport, altered apoptotic pathways, and changes in metabolic enzymes.
- Understanding these molecular alterations is crucial for developing effective treatments.
- Current therapeutic approaches for metastatic melanoma are largely ineffective.
Conclusions:
- The molecular basis of melanoma's resistance to chemotherapy is complex and multifaceted.
- Targeting these specific molecular mechanisms may lead to the development of novel and more effective therapeutic strategies.
- Further research into melanoma's drug resistance is essential for improving patient outcomes.
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