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New Functions of Vav Family Proteins in Cardiovascular Biology, Skeletal Muscle, and the Nervous System
Sonia Rodríguez-Fdez1,2,3, L Francisco Lorenzo-Martín1,2,3, Salvatore Fabbiano1,2
1Molecular Mechanisms of Cancer Program, Centro de Investigación del Cáncer, CSIC-University of Salamanca, 37007 Salamanca, Spain.
Abstract:
Vav proteins act as tyrosine phosphorylation-regulated guanosine nucleotide exchange factors for Rho GTPases and as molecular scaffolds. In mammals, this family of signaling proteins is composed of three members (Vav1, Vav2, Vav3) that work downstream of protein tyrosine kinases in a wide variety of cellular processes. Recent work with genetically modified mouse models has revealed that these proteins play key signaling roles in vascular smooth and skeletal muscle cells, specific neuronal subtypes, and glia cells. These functions, in turn, ensure the proper regulation of blood pressure levels, skeletal muscle mass, axonal wiring, and fiber myelination events as well as systemic metabolic balance. The study of these mice has also led to the discovery of new physiological interconnection among tissues that contribute to the ontogeny and progression of different pathologies such as, for example, hypertension, cardiovascular disease, and metabolic syndrome. Here, we provide an integrated view of all these new Vav family-dependent signaling and physiological functions.
Insights
Vav proteins are crucial signaling molecules regulating blood pressure, muscle mass, and metabolism. Studies in genetically modified mice reveal their key roles in various cell types and disease development.
Area of Science:
- Molecular Biology
- Cell Signaling
- Physiology
Background:
- Vav proteins (Vav1, Vav2, Vav3) are guanine nucleotide exchange factors for Rho GTPases, acting downstream of tyrosine kinases.
- They function as molecular scaffolds in diverse cellular signaling pathways.
Purpose of the Study:
- To provide an integrated view of Vav family-dependent signaling and physiological functions.
- To highlight the roles of Vav proteins in regulating key physiological processes and their involvement in pathologies.
Main Methods:
- Utilized genetically modified mouse models to investigate Vav protein functions.
- Analyzed signaling pathways and physiological outcomes in vascular smooth muscle, skeletal muscle, neurons, and glia cells.
Main Results:
- Vav proteins are essential for regulating blood pressure, skeletal muscle mass, axonal wiring, and myelination.
- These proteins play a role in maintaining systemic metabolic balance.
- Discovered new physiological interconnections among tissues relevant to hypertension, cardiovascular disease, and metabolic syndrome.
Conclusions:
- Vav proteins are critical regulators of multiple physiological systems.
- Understanding Vav functions offers insights into the development and progression of complex diseases.
- Further research into Vav signaling pathways can inform therapeutic strategies for cardiovascular and metabolic disorders.
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