4.3 Article

Distinct mechanoreceptor pezo-1 isoforms modulate food intake in the nematode Caenorhabditis elegans

期刊

G3-GENES GENOMES GENETICS
卷 12, 期 3, 页码 -

出版社

OXFORD UNIV PRESS INC
DOI: 10.1093/g3journal/jkab429

关键词

PIEZO; pezo-1; mechanosensation; pharyngeal glands; pharyngeal pumping; behavior

资金

  1. National Insitutes of Health, National Institute of Arthritis and Musculoskeletal and Skin Diseases award [1R15AR068583-01A1]
  2. National Science Foundation, Division of Molecular and Cellular Biosciences [1818140]
  3. Intramural Research Program of the National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases
  4. Direct For Biological Sciences
  5. Div Of Molecular and Cellular Bioscience [1818140] Funding Source: National Science Foundation

向作者/读者索取更多资源

Two PIEZO mechanosensitive cation channels, PIEZO1 and PIEZO2, have been identified in mammals, where they are involved in sensory processes. However, little is known about how different PIEZOs transduce force and how their unique properties match the functional needs of the tissues they are expressed in. In this study, the nematode Caenorhabditis elegans was used to investigate the expression patterns and functions of the PIEZO ortholog (pezo-1). The study found that different pezo-1 isoforms are expressed in different tissues and cells of the digestive system, suggesting distinct functions for these isoforms. Mutant analysis also showed that long pezo-1 isoforms are necessary for appropriate responses to food in pharyngeal muscles and glands. This research provides valuable insights into the molecular basis for functional differences in the PIEZO family of mechanoreceptors.
Two PIEZO mechanosensitive cation channels, PIEZO1 and PIEZO2, have been identified in mammals, where they are involved in numerous sensory processes. While structurally similar, PIEZO channels are expressed in distinct tissues and exhibit unique properties. How different PIEZOs transduce force, how their transduction mechanism varies, and how their unique properties match the functional needs of the tissues they are expressed in remain all-important unanswered questions. The nematode Caenorhabditis elegans has a single PIEZO ortholog (pezo-1) predicted to have 12 isoforms. These isoforms share many transmembrane domains but differ in those that distinguish PIEZO1 and PIEZO2 in mammals. We used transcriptional and translational reporters to show that putative promoter sequences immediately upstream of the start codon of long pezo-1 isoforms predominantly drive green fluorescent protein (GFP) expression in mesodermally derived tissues (such as muscle and glands). In contrast, sequences upstream of shorter pezo-1 isoforms resulted in GFP expression primarily in neurons. Putative promoters upstream of different isoforms drove GFP expression in different cells of the same organs of the digestive system. The observed unique pattern of complementary expression suggests that different isoforms could possess distinct functions within these organs. We used mutant analysis to show that pharyngeal muscles and glands require long pezo-1 isoforms to respond appropriately to the presence of food. The number of pezo-1 isoforms in C. elegans, their putative differential pattern of expression, and roles in experimentally tractable processes make this an attractive system to investigate the molecular basis for functional differences between members of the PIEZO family of mechanoreceptors.

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