Tumor Microenvironment: Understanding its Complex Role in Cancer Progression Cancer associated fibroblasts, also known as activated fibroblasts, are the most abundant cell type present in the tumor stroma. Under normal conditions, fibroblasts secrete factors to maintain tissue homeostasis. However, in the tumor microenvironment, fibroblasts undergo changes that stimulate tumor growth and invasion. They secrete growth factors, cytokines and enzymes that promote cancer...
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