Pubfacts - Scientific Publication Data
  • Categories
  • |
  • Journals
  • |
  • Authors
  • Login
  • Categories
  • Journals

Search Our Scientific Publications & Authors

Publications
  • Publications
  • Authors
find publications by category +
Translate page:

UNC45A deficiency causes microvillus inclusion disease-like phenotype by impairing myosin VB-dependent apical trafficking.

Authors:
Rémi Duclaux-Loras Corinne Lebreton Jérémy Berthelet Fabienne Charbit-Henrion Ophelie Nicolle Céline Revenu de Courtils Stephanie Waich Taras Valovka Anis Khiat Marion Rabant Caroline Racine Ida Chiara Guerrera Júlia Baptista Maxime M Mahe Michael W Hess Béatrice Durel Nathalie Lefort Céline Banal Mélanie Parisot Cecile Talbotec Florence Lacaille Emmanuelle Ecochard-Dugelay Arzu Meltem Demir Georg F Vogel Laurence Faivre Astor Rodrigues Darren Fowler Andreas R Janecke Thomas Müller Lukas A Huber

J Clin Invest 2022 05;132(10)

Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.

Variants in the UNC45A cochaperone have been recently associated with a syndrome combining diarrhea, cholestasis, deafness, and bone fragility. Yet the mechanism underlying intestinal failure in UNC45A deficiency remains unclear. Here, biallelic variants in UNC45A were identified by next-generation sequencing in 6 patients with congenital diarrhea. Corroborating in silico prediction, variants either abolished UNC45A expression or altered protein conformation. Myosin VB was identified by mass spectrometry as client of the UNC45A chaperone and was found misfolded in UNC45AKO Caco-2 cells. In keeping with impaired myosin VB function, UNC45AKO Caco-2 cells showed abnormal epithelial morphogenesis that was restored by full-length UNC45A, but not by mutant alleles. Patients and UNC45AKO 3D organoids displayed altered luminal development and microvillus inclusions, while 2D cultures revealed Rab11 and apical transporter mislocalization as well as sparse and disorganized microvilli. All those features resembled the subcellular abnormalities observed in duodenal biopsies from patients with microvillus inclusion disease. Finally, microvillus inclusions and shortened microvilli were evidenced in enterocytes from unc45a-deficient zebrafish. Taken together, our results provide evidence that UNC45A plays an essential role in epithelial morphogenesis through its cochaperone function of myosin VB and that UNC45A loss causes a variant of microvillus inclusion disease.

Download full-text PDF

Source
http://dx.doi.org/10.1172/JCI154997DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9106349PMC
May 2022

Publication Analysis

Top Keywords

microvillus inclusion
12
unc45a
9
unc45ako caco-2
8
variants unc45a
8
microvillus inclusions
8
inclusion disease
8
unc45a deficiency
8
epithelial morphogenesis
8
caco-2 cells
8
microvillus
5
restored full-length
4
full-length unc45a
4
unc45a mutant
4
mutant alleles
4
patients unc45ako
4
alleles patients
4
unc45ako organoids
4
organoids displayed
4
displayed altered
4
altered luminal
4

Keyword Occurance

Similar Publications

Fetal Bowel Abnormalities Suspected by Ultrasonography in Microvillus Inclusion Disease: Prevalence and Clinical Significance.

Authors:
Yue Sun Changsen Leng Sven C D van Ijzendoorn

J Clin Med 2022 Jul 26;11(15). Epub 2022 Jul 26.

Department of Biomedical Sciences of Cells and Systems, Section Molecular Cell Biology, University of Groningen, University Medical Center Groningen, 9713 AV Groningen, The Netherlands.

Microvillus inclusion disease (MVID) is a rare, inherited, congenital, diarrheal disorder that is invariably fatal if left untreated. Within days after birth, MVID presents as a life-threatening emergency characterized by severe dehydration, metabolic acidosis, and weight loss. Diagnosis is cumbersome and can take a long time. Read More

View Article and Full-Text PDF
July 2022
Similar Publications

Loss of Serum Glucocorticoid-Inducible Kinase 1 SGK1 Worsens Malabsorption and Diarrhea in Microvillus Inclusion Disease (MVID).

Authors:
Md Kaimul Ahsan Diego Carlos Dos Reis Andrea Barbieri Kaelyn D Sumigray Timothy Nottoli Pedro J Salas Nadia A Ameen

J Clin Med 2022 Jul 19;11(14). Epub 2022 Jul 19.

Department of Pediatrics, Gastroenterology and Hepatology, Yale University School of Medicine, New Haven, CT 06510, USA.

Microvillus inclusion disease (MVID), a lethal congenital diarrheal disease, results from loss of function mutations in the apical actin motor myosin VB (MYO5B). How loss of MYO5B leads to both malabsorption and fluid secretion is not well understood. Serum glucocorticoid-inducible kinase 1 (SGK1) regulates intestinal carbohydrate and ion transporters including cystic fibrosis transmembrane conductance regulator (CFTR). Read More

View Article and Full-Text PDF
July 2022
Similar Publications

Case Report: Homozygous Variant c.2090+3A>T Causes Intron Retention Related to Chronic Cholestasis and Diarrhea.

Authors:
Yu Zheng Yuming Peng Shuju Zhang Hongmei Zhao Weijian Chen Yongjia Yang Zhengmao Hu Qiang Yin Yu Peng

Front Genet 2022 30;13:872836. Epub 2022 May 30.

First Department of General Surgery & Pediatrics Research Institute of Hunan Province, Hunan Children's Hospital, Changsha, China.

Biallelically mutated is associated with microvillus inclusion disease (MVID, MIM: 251850), cholestasis, or both. This study aims at validating the splicing alteration and clinical features of an intron variant for diagnosis. A homozygous variant of , NM_001080467. Read More

View Article and Full-Text PDF
May 2022
Similar Publications

Altered MYO5B Function Underlies Microvillus Inclusion Disease: Opportunities for Intervention at a Cellular Level.

Authors:
Deanna M Bowman Izumi Kaji James R Goldenring

Cell Mol Gastroenterol Hepatol 2022 Jun 1. Epub 2022 Jun 1.

Section of Surgical Sciences, Vanderbilt University Medical Center, Nashville, Tennessee; Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee; Epithelial Biology Center, Vanderbilt University School of Medicine, Nashville, Tennessee; Nashville VA Medical Center, Nashville, Tennessee. Electronic address:

Microvillus inclusion disease (MVID) is a congenital diarrheal disorder resulting in life-threatening secretory diarrhea in newborns. Inactivating and nonsense mutations in myosin Vb (MYO5B) have been identified in MVID patients. Work using patient tissues, cell lines, mice, and pigs has led to critical insights into the pathology of MVID and a better understanding of both apical trafficking in intestinal enterocytes and intestinal stem cell differentiation. Read More

View Article and Full-Text PDF
June 2022
Similar Publications

UNC45A deficiency causes microvillus inclusion disease-like phenotype by impairing myosin VB-dependent apical trafficking.

Authors:
Rémi Duclaux-Loras Corinne Lebreton Jérémy Berthelet Fabienne Charbit-Henrion Ophelie Nicolle Céline Revenu de Courtils Stephanie Waich Taras Valovka Anis Khiat Marion Rabant Caroline Racine Ida Chiara Guerrera Júlia Baptista Maxime M Mahe Michael W Hess Béatrice Durel Nathalie Lefort Céline Banal Mélanie Parisot Cecile Talbotec Florence Lacaille Emmanuelle Ecochard-Dugelay Arzu Meltem Demir Georg F Vogel Laurence Faivre Astor Rodrigues Darren Fowler Andreas R Janecke Thomas Müller Lukas A Huber

J Clin Invest 2022 05;132(10)

Institute of Cell Biology, Biocenter, Medical University of Innsbruck, Innsbruck, Austria.

Variants in the UNC45A cochaperone have been recently associated with a syndrome combining diarrhea, cholestasis, deafness, and bone fragility. Yet the mechanism underlying intestinal failure in UNC45A deficiency remains unclear. Here, biallelic variants in UNC45A were identified by next-generation sequencing in 6 patients with congenital diarrhea. Read More

View Article and Full-Text PDF
May 2022
Similar Publications
}
© 2022 PubFacts.
  • About PubFacts
  • Privacy Policy
  • Sitemap