Loss of Sprouty Produces a Ciliopathic Skeletal Phenotype in Mice Through Upregulation of Hedgehog Signaling

Varování

Publikace nespadá pod Lékařskou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.

Autoři

HRUBÁ Eva KAVKOVÁ Michaela DALECKÁ Linda MACHOLÁN Miloš ZIKMUND Tomáš VAŘECHA Miroslav BOSÁKOVÁ Michaela KAISER Jozef KREJČÍ Pavel HOVOŘÁKOVÁ Mária BUCHTOVÁ marcela

Rok publikování 2021
Druh Článek v odborném periodiku
Časopis / Zdroj Journal of Bone and Mineral Research
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://doi.org/10.1002/jbmr.4427
Doi http://dx.doi.org/10.1002/jbmr.4427
Klíčová slova BONE QCT/mu CT; ANALYSIS/QUANTITATION OF BONE; GENETIC ANIMAL MODELS; MOLECULAR PATHWAYS - DEVELOPMENT; LIMB PATTERNING; BONE MODELING AND REMODELING; HEDGEHOG; CELL/TISSUE SIGNALING
Popis The Sprouty family is a highly conserved group of intracellular modulators of receptor tyrosine kinase (RTK)-signaling pathways, which have been recently linked to primary cilia. Disruptions in the structure and function of primary cilia cause inherited disorders called ciliopathies. We aimed to evaluate Sprouty2 and Sprouty4 gene-dependent alterations of ciliary structure and to focus on the determination of its association with Hedgehog signaling defects in chondrocytes. Analysis of the transgenic mice phenotype with Sprouty2 and Sprouty4 deficiency revealed several defects, including improper endochondral bone formation and digit patterning, or craniofacial and dental abnormalities. Moreover, reduced bone thickness and trabecular bone mass, skull deformities, or chondromalike lesions were revealed. All these pathologies might be attributed to ciliopathies. Elongation of the ciliary axonemes in embryonic and postnatal growth plate chondrocytes was observed in Sprouty2(-/-) and Sprouty2(+/-)/Sprouty4(-/-) mutants compared with corre- sponding littermate controls. Also, cilia-dependent Hedgehog signaling was upregulated in Sprouty2/4 mutant animals. Ptch1 and Ihh expression were upregulated in the autopodium and the proximal tibia of Sprouty2(-/-)/Sprouty4(-/-) mutants. Increased levels of the GLI3 repressor (GLI3R) form were detected in Sprouty2/4 mutant primary fibroblast embryonic cell cultures and tissues. These findings demonstrate that mouse lines deficient in Sprouty proteins manifest phenotypic features resembling ciliopathic phenotypes in multiple aspects and may serve as valuable models to study the association between overactivation of RTK and dysfunction of primary cilia during skeletogenesis.
Související projekty:

Používáte starou verzi internetového prohlížeče. Doporučujeme aktualizovat Váš prohlížeč na nejnovější verzi.

Další info