Tumor Microenvironment Stress and Stress Adaptation Mechanisms

Abstract

The tumor microenvironment (TME) constitutes a highly dynamic and interactive complex ecosystem, whose core components include tumor cells, stromal cells, immune cells, and an intricate network of signaling molecules. A prominent characteristic of this environment is the presence of multiple tumor-intrinsic stress responses, including hypoxia, oxidative stress, endoplasmic reticulum (ER) stress, metabolic stress, and mechanical stress. These stressors do not act in isolation but act synergistically to form a unique microenvironmental stress field, ultimately serving as a key biological engine that drives tumorigenesis, promotes disease progression, and induces therapeutic resistance. Emerging evidence highlights that targeted modulation of TME stress signaling pathways can not only suppress tumor growth but also remodel the immunosuppressive landscape, thereby augmenting anti-tumor immunity and achieving a synergistic “stress induction-immune activation” effect. This review provides a comprehensive synthesis of the molecular mechanisms underlying TME stress, adaptive strategies employed by tumor cells, and recent therapeutic advances centered on stress regulation. By integrating mechanistic insights with translational perspectives, this article aims to offer a foundational framework for developing novel combination therapies in oncology.