Cancer Signaling Pathways

This advanced topic examines the specific intracellular signaling pathways whose dysregulation is fundamental to cancer development, essential for diploma and degree students in Molecular Biology, Biochemistry, and Oncology in Zambia. You will analyze key pathways such as the MAPK (Ras-Raf-MEK-ERK), PI3K-AKT-mTOR, TGF-β, JAK-STAT, NF-κB, WNT, Hedgehog, and NOTCH pathways. The module details how genetic and epigenetic mutations lead to constitutive activation or inactivation of these pathways, resulting in uncontrolled cell proliferation, survival, and metastasis. Understanding the synergy between pathways like MAPK and PI3K, and the context-dependent roles of pathways like TGF-β (which can suppress or promote tumors), is crucial. This knowledge is directly applicable to modern cancer research and the development of targeted therapies. For Zambian college and university learners, mastering these pathways is vital for excelling in examinations on cellular communication and molecular oncology, and provides a strong foundation for future roles in biomedical research, pharmacogenomics, and clinical laboratory science.