UMMS Affiliation
Program in Molecular Medicine
Publication Date
2021-08-26
Document Type
Article
Disciplines
Cell Biology | Cellular and Molecular Physiology | Congenital, Hereditary, and Neonatal Diseases and Abnormalities | Developmental Biology | Endocrinology
Abstract
Primary cilia protrude from the apical surface of many cell types and act as a sensory organelle that regulates diverse biological processes ranging from chemo- and mechanosensation to signaling. Ciliary dysfunction is associated with a wide array of genetic disorders, known as ciliopathies. Polycystic lesions are commonly found in the kidney, liver, and pancreas of ciliopathy patients and mouse models. However, the pathogenesis of the pancreatic phenotype remains poorly understood. Chibby1 (Cby1), a small conserved coiled-coil protein, localizes to the ciliary base and plays a crucial role in ciliogenesis. Here, we report that Cby1-knockout (KO) mice develop severe exocrine pancreatic atrophy with dilated ducts during early postnatal development. A significant reduction in the number and length of cilia was observed in Cby1-KO pancreta. In the adult Cby1-KO pancreas, inflammatory cell infiltration and fibrosis were noticeable. Intriguingly, Cby1-KO acinar cells showed an accumulation of zymogen granules (ZGs) with altered polarity. Moreover, isolated acini from Cby1-KO pancreas exhibited defective ZG secretion in vitro. Collectively, our results suggest that, upon loss of Cby1, concomitant with ciliary defects, acinar cells accumulate ZGs due to defective exocytosis, leading to cell death and progressive exocrine pancreatic degeneration after birth.
Keywords
Ciliogenesis, Mechanisms of disease, Secretion
Rights and Permissions
Copyright © The Author(s) 2021. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
DOI of Published Version
10.1038/s41598-021-96597-w
Source
Cyge B, Voronina V, Hoque M, Kim EN, Hall J, Bailey-Lundberg JM, Pazour GJ, Crawford HC, Moon RT, Li FQ, Takemaru KI. Loss of the ciliary protein Chibby1 in mice leads to exocrine pancreatic degeneration and pancreatitis. Sci Rep. 2021 Aug 26;11(1):17220. doi: 10.1038/s41598-021-96597-w. PMID: 34446743; PMCID: PMC8390639. Link to article on publisher's site
Journal/Book/Conference Title
Scientific reports
Related Resources
PubMed ID
34446743
Repository Citation
Cyge B, Voronina V, Hoque M, Kim EN, Hall J, Bailey-Lundberg JM, Pazour GJ, Crawford HC, Moon RT, Li F, Takemaru K. (2021). Loss of the ciliary protein Chibby1 in mice leads to exocrine pancreatic degeneration and pancreatitis. Open Access Publications by UMass Chan Authors. https://doi.org/10.1038/s41598-021-96597-w. Retrieved from https://escholarship.umassmed.edu/oapubs/4914
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Included in
Cell Biology Commons, Cellular and Molecular Physiology Commons, Congenital, Hereditary, and Neonatal Diseases and Abnormalities Commons, Developmental Biology Commons, Endocrinology Commons