2026-06-14T02:29:31Zhttps://repisalud.isciii.es/rest/oai/requestoai:repisalud.isciii.es:20.500.12105/115692025-06-13T08:43:01Zcom_20.500.12105_2052com_20.500.12105_2051col_20.500.12105_19617
Repisalud
author
Baltanás, Fernando C
author
Zarich-Dimitrievich, Natasha
author
Rojas-Cabañeros, Jose Maria
author
Santos, Eugenio
funder
Instituto de Salud Carlos III
funder
Fundación Ramón Areces
funder
Ministerio de Economía y Competitividad (España)
funder
Unión Europea. Fondo Europeo de Desarrollo Regional (FEDER/ERDF)
funder
Asociación Española Contra el Cáncer
2020-12-29T11:31:47Z
2020-12-29T11:31:47Z
2020-12
Biochim Biophys Acta Rev Cancer . 2020 Dec;1874(2):188445
10.1016/j.bbcan.2020.188445
1879-2561
Biochimica et biophysica acta. Reviews on cancer
33035641
http://hdl.handle.net/20.500.12105/11569
SOS1 and SOS2 are the most universal and widely expressed family of guanine exchange factors (GEFs) capable or activating RAS or RAC1 proteins in metazoan cells. SOS proteins contain a sequence of modular domains that are responsible for different intramolecular and intermolecular interactions modulating mechanisms of self-inhibition, allosteric activation and intracellular homeostasis. Despite their homology, analyses of SOS1/2-KO mice demonstrate functional prevalence of SOS1 over SOS2 in cellular processes including proliferation, migration, inflammation or maintenance of intracellular redox homeostasis, although some functional redundancy cannot be excluded, particularly at the organismal level. Specific SOS1 gain-of-function mutations have been identified in inherited RASopathies and various sporadic human cancers. SOS1 depletion reduces tumorigenesis mediated by RAS or RAC1 in mouse models and is associated with increased intracellular oxidative stress and mitochondrial dysfunction. Since WT RAS is essential for development of RAS-mutant tumors, the SOS GEFs may be considered as relevant biomarkers or therapy targets in RAS-dependent cancers. Inhibitors blocking SOS expression, intrinsic GEF activity, or productive SOS protein-protein interactions with cellular regulators and/or RAS/RAC targets have been recently developed and shown preclinical and clinical effectiveness blocking aberrant RAS signaling in RAS-driven and RTK-driven tumors.
eng
SOS1
SOS2
RASGEF
RAS
Cancer
Rasopathies
SOS GEFs in health and disease
research article
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URL
https://repisalud.isciii.es/bitstreams/d2d8ecd2-e3e7-4b14-bc86-d18c58b49034/download
File
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SOSGEFsInHealth_2020.pdf
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https://repisalud.isciii.es/bitstreams/a660c03e-b2b6-40d1-b97a-e814a53e5fc4/download
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SOSGEFsInHealth_2020.pdf.txt