Related Experiment Video
Updated: Jun 10, 2026
07:26
Isolation of Whole Cell Protein Lysates from Mouse Facial Processes and Cultured Palatal Mesenchyme Cells for Phosphoprotein Analysis
Published on: April 1, 2022
Signaling pathways in human skeletal dysplasias
Dustin Baldridge1, Oleg Shchelochkov, Brian Kelley
1Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA. dustin.baldridge@bcm.edu
Annual Review of Genomics and Human Genetics
|August 10, 2010
Summary
Human skeletal dysplasias arise from errors in bone and cartilage development, often due to dysregulated signaling pathways. A new morphogen rheostat model explains how metabolic mutations create diverse skeletal phenotypes.
Area of Science:
- Genetics
- Developmental Biology
- Biochemistry
Background:
- Human skeletal dysplasias are developmental disorders affecting bone, cartilage, and joints.
- Skeletogenesis relies on complex signaling pathways like FGF, TGF-beta, BMP, WNT, Notch, and Hedgehog.
- Dysregulation of these pathways, often due to genetic mutations, leads to skeletal abnormalities.
Purpose of the Study:
- To propose a conceptual model for understanding skeletal dysplasia phenotypes.
- To explain how mutations in metabolic processes integrate signaling pathways.
- To link genetic defects to diverse skeletal outcomes.
Main Methods:
- Review of human genetic skeletal dysplasia phenotypes.
- Analysis of key signaling pathways in skeletogenesis.
- Development of the morphogen rheostat model.
Main Results:
- Specific pathway components show predominant roles in genetic phenotypes.
- Mutations affecting metabolic processing, extracellular matrix, and transcriptional regulation disrupt signaling.
- The morphogen rheostat model integrates temporal and spatial signaling inputs.
Conclusions:
- The morphogen rheostat model provides a framework for understanding skeletal dysplasia.
- Metabolic processes play a crucial role in integrating signaling pathways for skeletal development.
- This model helps explain the generation of diverse skeletal phenotypes from genetic mutations.
Related Concept Videos
03:14Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
03:14Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
01:30Assembly of Signaling Complexes
Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
01:19Interactions Between Signaling Pathways
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
02:33Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
02:33Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...