Cell Communication and Signal Transduction Pathways

This advanced topic is designed for Zambian university students in molecular biology, genetics, biochemistry, and medical programs. It covers the fundamental mechanisms by which cells receive, process, and respond to external signals, a process central to all life. You will explore different types of receptors (GPCRs, Receptor Tyrosine Kinases, nuclear receptors), key second messengers (cAMP, cGMP, IP3, DAG, Ca2+), and major intracellular signaling pathways such as the cAMP-PKA, cGMP, Ras-MAPK, and PI3K-Akt pathways. The topic emphasizes how these pathways regulate critical cellular processes like metabolism, growth, differentiation, and apoptosis. Furthermore, it links dysregulation of these pathways (e.g., in Ras or Akt) to human diseases like cancer and diabetes, highlighting the relevance for therapeutic targeting. This knowledge is essential for understanding modern pharmacology, disease mechanisms, and for excelling in advanced tertiary examinations and research projects in Zambia.