Mek1Y130C mice recapitulate aspects of human cardio-facio-cutaneous syndrome

Rifdat Aoidi, Nicolas Houde, Kim Landry-Truchon, Michael Holter, Kevin Jacquet, Louis Charron, Suguna Rani Krishnaswami, Benjamin D. Yu, Katherine A Rauen, Nicolas Bisson, Jason Newbern, Jean Charron

Research output: Contribution to journalReview article

3 Citations (Scopus)

Abstract

The RAS/MAPK signaling pathway is one of the most investigated pathways, owing to its established role in numerous cellular processes and implication in cancer. Germline mutations in genes encoding members of the RAS/MAPK pathway also cause severe developmental syndromes collectively known as RASopathies. These syndromes share overlapping characteristics, including craniofacial dysmorphology, cardiac malformations, cutaneous abnormalities and developmental delay. Cardio-facio-cutaneous syndrome (CFC) is a rare RASopathy associated with mutations in BRAF, KRAS, MEK1 (MAP2K1) and MEK2 (MAP2K2). MEK1 and MEK2 mutations are found in ?25% of the CFC patients and the MEK1Y130C substitution is the most common one. However, little is known about the origins and mechanisms responsible for the development of CFC. To our knowledge, no mouse model carrying RASopathy-linked Mek1 or Mek2 gene mutations has been reported. To investigate the molecular and developmental consequences of the Mek1Y130C mutation, we generated a mouse line carrying this mutation. Analysis of mice from a Mek1 allelic series revealed that the Mek1Y130C allele expresses both wild-type and Y130C mutant forms of MEK1. However, despite reduced levels of MEK1 protein and the lower abundance of MEK1 Y130C protein than wild type, Mek1Y130C mutants showed increased ERK (MAPK) protein activation in response to growth factors, supporting a role for MEK1 Y130C in hyperactivation of the RAS/MAPK pathway, leading to CFC. Mek1Y130C mutant mice exhibited pulmonary artery stenosis, cranial dysmorphia and neurological anomalies, including increased numbers of GFAP+ astrocytes and Olig2+ oligodendrocytes in regions of the cerebral cortex. These data indicate that the Mek1Y130C mutation recapitulates major aspects of CFC, providing a new animal model to investigate the physiopathology of this RASopathy.

Original languageEnglish (US)
Article number031278
JournalDMM Disease Models and Mechanisms
Volume11
Issue number3
DOIs
StatePublished - Mar 1 2018

Fingerprint

Mutation
Proteins
Gene encoding
Intercellular Signaling Peptides and Proteins
Animals
Substitution reactions
Genes
Chemical activation
Skin Abnormalities
Germ-Line Mutation
Oligodendroglia
Astrocytes
Cerebral Cortex
Cardiofaciocutaneous syndrome
Animal Models
Alleles
Neoplasms

Keywords

  • Cardio-facio-cutaneous syndrome
  • MEK1 Y130C mutation
  • Mouse model
  • Neurological defects
  • Pulmonary artery stenosis
  • RAS/MAPK pathway

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Medicine (miscellaneous)
  • Immunology and Microbiology (miscellaneous)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Aoidi, R., Houde, N., Landry-Truchon, K., Holter, M., Jacquet, K., Charron, L., ... Charron, J. (2018). Mek1Y130C mice recapitulate aspects of human cardio-facio-cutaneous syndrome. DMM Disease Models and Mechanisms, 11(3), [031278]. https://doi.org/10.1242/dmm.031278

Mek1Y130C mice recapitulate aspects of human cardio-facio-cutaneous syndrome. / Aoidi, Rifdat; Houde, Nicolas; Landry-Truchon, Kim; Holter, Michael; Jacquet, Kevin; Charron, Louis; Krishnaswami, Suguna Rani; Yu, Benjamin D.; Rauen, Katherine A; Bisson, Nicolas; Newbern, Jason; Charron, Jean.

In: DMM Disease Models and Mechanisms, Vol. 11, No. 3, 031278, 01.03.2018.

Research output: Contribution to journalReview article

Aoidi, R, Houde, N, Landry-Truchon, K, Holter, M, Jacquet, K, Charron, L, Krishnaswami, SR, Yu, BD, Rauen, KA, Bisson, N, Newbern, J & Charron, J 2018, 'Mek1Y130C mice recapitulate aspects of human cardio-facio-cutaneous syndrome', DMM Disease Models and Mechanisms, vol. 11, no. 3, 031278. https://doi.org/10.1242/dmm.031278
Aoidi R, Houde N, Landry-Truchon K, Holter M, Jacquet K, Charron L et al. Mek1Y130C mice recapitulate aspects of human cardio-facio-cutaneous syndrome. DMM Disease Models and Mechanisms. 2018 Mar 1;11(3). 031278. https://doi.org/10.1242/dmm.031278
Aoidi, Rifdat ; Houde, Nicolas ; Landry-Truchon, Kim ; Holter, Michael ; Jacquet, Kevin ; Charron, Louis ; Krishnaswami, Suguna Rani ; Yu, Benjamin D. ; Rauen, Katherine A ; Bisson, Nicolas ; Newbern, Jason ; Charron, Jean. / Mek1Y130C mice recapitulate aspects of human cardio-facio-cutaneous syndrome. In: DMM Disease Models and Mechanisms. 2018 ; Vol. 11, No. 3.
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abstract = "The RAS/MAPK signaling pathway is one of the most investigated pathways, owing to its established role in numerous cellular processes and implication in cancer. Germline mutations in genes encoding members of the RAS/MAPK pathway also cause severe developmental syndromes collectively known as RASopathies. These syndromes share overlapping characteristics, including craniofacial dysmorphology, cardiac malformations, cutaneous abnormalities and developmental delay. Cardio-facio-cutaneous syndrome (CFC) is a rare RASopathy associated with mutations in BRAF, KRAS, MEK1 (MAP2K1) and MEK2 (MAP2K2). MEK1 and MEK2 mutations are found in ?25{\%} of the CFC patients and the MEK1Y130C substitution is the most common one. However, little is known about the origins and mechanisms responsible for the development of CFC. To our knowledge, no mouse model carrying RASopathy-linked Mek1 or Mek2 gene mutations has been reported. To investigate the molecular and developmental consequences of the Mek1Y130C mutation, we generated a mouse line carrying this mutation. Analysis of mice from a Mek1 allelic series revealed that the Mek1Y130C allele expresses both wild-type and Y130C mutant forms of MEK1. However, despite reduced levels of MEK1 protein and the lower abundance of MEK1 Y130C protein than wild type, Mek1Y130C mutants showed increased ERK (MAPK) protein activation in response to growth factors, supporting a role for MEK1 Y130C in hyperactivation of the RAS/MAPK pathway, leading to CFC. Mek1Y130C mutant mice exhibited pulmonary artery stenosis, cranial dysmorphia and neurological anomalies, including increased numbers of GFAP+ astrocytes and Olig2+ oligodendrocytes in regions of the cerebral cortex. These data indicate that the Mek1Y130C mutation recapitulates major aspects of CFC, providing a new animal model to investigate the physiopathology of this RASopathy.",
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