Functions of fibroblast growth factors and their receptors

A O Wilkie1, G M Morriss-Kay, E Y Jones

  • 1Institute of Molecular Medicine, John Radcliffe Hospital, Oxford, UK.

Insights

Fibroblast growth factors (FGFs) were identified as mitogens but their normal functions in vivo are now being uncovered. Studies of mutations in FGFs and their receptors are revealing their roles in mice and humans.

Area of Science:

  • Cell Biology
  • Genetics
  • Developmental Biology

Background:

  • Fibroblast growth factors (FGFs) were initially identified as mitogens for cultured fibroblasts.
  • Extensive in vitro data exist, but in vivo functions remain less understood.
  • Recent advances are shedding light on the physiological roles of FGFs.

Purpose of the Study:

  • To elucidate the normal biological functions of fibroblast growth factors.
  • To investigate the roles of FGFs and their receptors in mammalian development and physiology.
  • To leverage insights from genetic studies to understand FGF signaling pathways.

Main Methods:

  • Analysis of natural and experimentally induced mutations in FGF genes.
  • Studies on mutations affecting FGF receptors.
  • Phenotypic analysis of mutant mice and human genetic data.

Main Results:

  • Mutations in FGFs and their receptors lead to observable developmental and physiological defects.
  • These studies highlight the critical roles of specific FGFs in various biological processes.
  • Understanding genotype-phenotype correlations in FGF-related disorders.

Conclusions:

  • Fibroblast growth factors are essential regulators of normal physiological processes in vivo.
  • Studies of genetic mutations provide crucial insights into FGF function.
  • Further research into FGF signaling pathways holds potential for therapeutic interventions.

Related Concept Videos

Mitogens and the Cell Cycle02:38

Mitogens and the Cell Cycle

Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
Introduction to Fibroblasts01:09

Introduction to Fibroblasts

Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
TGF - β Signaling Pathway01:16

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
Fibronectins Connect Cells with ECM01:25

Fibronectins Connect Cells with ECM

Fibronectin is an adhesive glycoprotein present in the extracellular matrix of embryogenic and adult tissue. These molecules primarily aid in regulating cell motility and attachment. A fibronectin molecule is composed of two identical polypeptide chains attached to each other by a pair of disulfide bonds at the C-terminal.
Both proteoglycans and collagen are attached to fibronectin proteins, which, in turn, are attached to integrin proteins. These integrin proteins interact with transmembrane...
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Role of Hematopoietic Growth Factors01:28

Role of Hematopoietic Growth Factors

Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...