Immunotherapy resistance in solid tumors: mechanisms and potential solutions

Area of Science:

• Oncology
• Immunology
• Cancer Biology

Background:

• Immunotherapies have revolutionized cancer treatment, particularly for solid tumors.
• However, cancer cells develop resistance to these life-saving therapies through diverse biological mechanisms.
• Understanding these resistance mechanisms is crucial for improving patient outcomes.

Purpose of the Study:

• To review the primary (innate) and secondary (acquired) mechanisms by which cancers resist natural immunity and immunotherapies.
• To explore available and emerging therapeutic strategies for overcoming immunotherapy resistance in solid tumors.

Main Methods:

• This review synthesizes current research on cancer resistance to immunotherapy.
• It examines cellular activities including antigen presentation, immunoregulation, metabolic reprogramming, and tumor microenvironment modulation.

Main Results:

• Cancers employ multifaceted strategies to evade immune surveillance and therapeutic interventions.
• Mechanisms of resistance involve alterations in immune signaling, cellular metabolism, and the tumor microenvironment.
• Both innate and acquired resistance pathways contribute to treatment failure.

Conclusions:

• Overcoming immunotherapy resistance in solid tumors requires a comprehensive understanding of cancer's complex evasion tactics.
• Targeting these resistance mechanisms holds significant promise for developing novel, effective cancer therapies.
• Further research into these intricate biological processes is essential for clinical advancement.