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How do growth factors and hormones influence cell differentiation?

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Diagram showing the locations of neural stem cells in brain regions such as the hippocampus and ventricles, and hematopoietic stem cells in the bone marrow and blood, with labeled illustrations of the brain, spinal cord, circulatory system, and skeleton. — stem cell Stem cells of neural and hematopoietic origin have tremendous potential in the development of therapies for certain diseases, such as diabetes and Parkinson disease. Neural stem cells occur in the spinal cord and in specific regions of the brain, and hematopoietic stem cells occur in the blood and bone marrow.

Cell differentiation is a complex process primarily driven by gene expression, which is influenced by various environmental signals, including growth factors and hormones.1

The Role of Growth Factors and Hormones

Growth factors are a group of proteins that stimulate the growth of specific tissues and play a critical role in promoting cellular differentiation and cell division. While some growth factors function similarly to hormones by traveling through the bloodstream to reach target tissues, they differ in that they can be produced by many different types of tissue, whereas hormones are typically limited to glandular tissue.2

These substances act as environmental signals that provide the necessary inputs for cells to commit to specific developmental pathways. For instance, certain growth factors can cooperate with hormones to influence target cells, and their abnormal regulation can significantly impact biological processes, such as angiogenesis in cancer progression. Ultimately, these signals help trigger the differential gene activity required for a cell to transition from an undifferentiated state to a specialized, committed cell type.1234