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10.
Oncogene ; 36(29): 4201-4211, 2017 07 20.
Artículo en Inglés | MEDLINE | ID: mdl-28346423

RESUMEN

Mps One Binder Kinase Activator (MOB)1A/1B are core components of the Hippo pathway. These proteins, which coactivate LArge Tumour Suppressor homologue kinases, are also tumour suppressors. To investigate MOB1A/B's roles in normal physiology and lung cancer, we generated doxycycline (Dox)-inducible, bronchioalveolar epithelium-specific, null mutations of MOB1A/B in mice (SPC-rtTA/(tetO)7-Cre/Mob1aflox/flox/Mob1b-/-; termed luMob1DKO mice). Most mutants (70%) receiving Dox in utero (luMob1DKO (E6.5-18.5) mice) died of hypoxia within 1 h post-birth. Their alveolar epithelial cells showed increased proliferation, impaired YAP1/TAZ-dependent differentiation and decreased surfactant protein production, all features characteristic of human respiratory distress syndrome. Intriguingly, mutant mice that received Dox postnatally (luMob1DKO (P21-41) mice) did not develop spontaneous lung adenocarcinomas, and urethane treatment-induced lung tumour formation was decreased (rather than increased). Lungs of luMob1DKO (P21-41) mice exhibited increased detachment of bronchiolar epithelial cells and decreased numbers of the bronchioalveolar stem cells thought to initiate lung adenocarcinomas. YAP1/TAZ-NKX2.1-dependent expression of collagen XVII, a key hemidesmosome component, was also reduced. Thus, a MOB1-YAP1/TAZ-NKX2.1 axis is essential for normal lung homeostasis and expression of the collagen XVII protein necessary for alveolar stem cell maintenance in the lung niche.


Asunto(s)
Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/patología , Aciltransferasas , Proteínas Adaptadoras Transductoras de Señales/genética , Proteínas Adaptadoras Transductoras de Señales/metabolismo , Animales , Adhesión Celular/fisiología , Proteínas de Ciclo Celular , Diferenciación Celular/fisiología , Línea Celular Tumoral , Humanos , Péptidos y Proteínas de Señalización Intracelular , Neoplasias Pulmonares/genética , Ratones , Proteínas Nucleares/genética , Proteínas Nucleares/metabolismo , Fosfoproteínas/genética , Fosfoproteínas/metabolismo , Transducción de Señal , Factor Nuclear Tiroideo 1 , Transactivadores , Factores de Transcripción/genética , Factores de Transcripción/metabolismo , Proteínas Señalizadoras YAP
20.
Br J Dermatol ; 171(4): 847-53, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-24773080

RESUMEN

BACKGROUND: Nagashima-type palmoplantar keratosis (NPPK) is a distinct autosomal recessive genodermatosis characterized by diffuse transgressive palmoplantar keratoderma (PPK). Very recently, putative loss-of-function mutations in SERPINB7, which encodes a member of the serine protease inhibitor superfamily and is abundantly expressed in the epidermis, have been identified as a cause of NPPK. OBJECTIVES: To confirm further the role of SERPINB7 mutations in the pathogenesis of NPPK. METHODS: We analysed 10 Japanese families with NPPK using Sanger and/or whole-exome sequencing. RESULTS: We identified one novel and three recurrent null mutations in SERPINB7. In all the families, the NPPK trait was inherited in an autosomal recessive manner; in one of the families, there was pseudodominant inheritance, which had not been described in NPPK. CONCLUSIONS: These data clearly provide further evidence that NPPK is caused by loss-of-function mutations in SERPINB7.


Asunto(s)
Efecto Fundador , Genes Dominantes/genética , Queratodermia Palmoplantar/genética , Serpinas/genética , Adolescente , Adulto , Anciano , Niño , Preescolar , Análisis Mutacional de ADN , Femenino , Heterocigoto , Homocigoto , Humanos , Lactante , Patrón de Herencia , Masculino , Persona de Mediana Edad , Linaje
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