Form of intracellular signalling: Paracrine
Paracrine signaling is a form of cell signaling in which a signaling molecule is released by one cell and acts on neighboring cells. In humans, paracrine signaling is involved in many physiological processes, including development, immunity, and tissue repair. Some examples of paracrine signaling pathways in humans include:
- Growth factor signaling: Growth factors are signaling molecules that regulate cell proliferation, differentiation, and survival. In paracrine signaling, growth factors are released by one cell and act on neighboring cells to stimulate cell growth and differentiation. Dysregulation of growth factor signaling can contribute to the development of cancer.
- Cytokine signaling: Cytokines are signaling molecules that regulate immune responses and inflammation. In paracrine signaling, cytokines are released by immune cells and act on neighboring cells to stimulate immune responses or inflammation. Dysregulation of cytokine signaling can contribute to the development of autoimmune disorders or chronic inflammation.
- Neurotransmitter signaling: Neurotransmitters are signaling molecules that regulate communication between neurons. In paracrine signaling, neurotransmitters are released by neurons and act on neighboring neurons to transmit signals. Dysregulation of neurotransmitter signaling can contribute to the development of neurological disorders.
- Wnt signaling: Wnt signaling is a highly conserved pathway that plays a critical role in development and tissue repair. In paracrine signaling, Wnt ligands are released by one cell and act on neighboring cells to promote cell proliferation and differentiation. Dysregulation of Wnt signaling can contribute to the development of cancer or developmental abnormalities.
Overall, paracrine signaling is a critical mechanism for regulating cell behavior and coordinating cellular processes in humans. Dysregulation of paracrine signaling can contribute to the development of a wide range of diseases, including cancer, autoimmune disorders, and neurological disorders. Understanding the mechanisms of paracrine signaling is an important area of research for developing new therapies for these diseases.
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