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[Integrins, cell response to anti-tumor agents and chemoresistance]
Sylvie Maubant1, Cathy Staedel, Pascal Gauduchon
1Groupe régional d'études sur le cancer, EA 1772 de l'université de Caen, Laboratoire de cancérologie expérimentale, Centre de lutte contre le cancer François-Baclesse, route de Lion-sur-Mer, 14076 Caen Cedex 05, France.
Abstract:
Integrins are a family of heterodimeric transmembrane receptors that mediate cell-cell and cell-extracellular matrix adhesion. Integrin-mediated signaling is essential for the regulation of fundamental cellular functions, including proliferation and survival, and for tumor development. According to in vitro studies, integrin ligation by extracellular matrix proteins can modulate the cytotoxicity of anti-tumor agents, in a cell-type sensitive manner. Underlying molecular mechanisms are not well understood, but may be based on the interrelations between integrin signaling pathways and pathways that control cell cycle and apoptosis. On the other hand, alterations of integrin expression and/or function have been observed during the acquisition of chemoresistance in cells chronically exposed to cytotoxic agents. These data are in favor of a role of integrins in chemoresistance processes, and open new perspectives in the field of cancer therapy and prognosis.
Insights
Integrins, crucial for cell adhesion and tumor growth, can affect anti-cancer drug effectiveness. Understanding integrin roles in chemoresistance may improve cancer therapy.
Area of Science:
- Cellular Biology
- Molecular Oncology
- Biochemistry
Context:
- Integrins are transmembrane receptors mediating cell adhesion, vital for cellular functions like proliferation and survival.
- Integrin signaling plays a key role in tumor development and progression.
- In vitro studies suggest integrin ligation influences anti-tumor agent cytotoxicity.
Purpose:
- To explore the role of integrins in modulating anti-tumor agent efficacy.
- To investigate the molecular mechanisms linking integrin signaling to cell cycle and apoptosis pathways.
- To examine the involvement of integrins in the development of chemoresistance.
Summary:
- Integrin ligation by extracellular matrix proteins can alter anti-tumor agent cytotoxicity in a cell-type specific manner.
- The molecular basis for this modulation may involve interactions between integrin signaling and cell cycle/apoptosis pathways.
- Altered integrin expression or function is observed in cells developing chemoresistance after chronic exposure to cytotoxic agents.
Impact:
- Integrins are implicated in chemoresistance mechanisms.
- Findings suggest integrins as potential therapeutic targets in cancer treatment.
- This research opens new avenues for cancer therapy and prognosis.