Polymodal Responses in C. elegans Phasmid Neurons Rely on Multiple Intracellular and Intercellular Signaling Pathways
Open accessAbstract
Animals utilize specialized sensory neurons enabling the detection of a wide range of environmental stimuli from the presence of toxic chemicals to that of touch. However, how these neurons discriminate between different kinds of stimuli remains poorly understood. By combining in vivo calcium imaging and molecular genetic manipulation, here we investigate the response patterns and the underlying mechanisms of the C. elegans phasmid neurons PHA/PHB to a variety of sensory stimuli. Our observations demonstrate that PHA/PHB neurons are polymodal sensory neurons which sense harmful chemicals, hyperosmotic solutions and mechanical stimulation. A repulsive concentration of IAA induces calcium elevations in PHA/PHB and both OSM-9 and TAX-4 are essential for IAA-sensing in PHA/PHB. Nevertheless, the PHA/PHB neurons are inhibited by copper and post-synaptically activated by copper removal. Neuropeptide is likely involved in copper removal-induced calcium elevations in PHA/PHB. Furthermore, mechanical stimulation activates PHA/PHB in an OSM-9-dependent manner. Our work demonstrates how PHA/PHB neurons respond to multiple environmental stimuli and lays a foundation for the further understanding of the mechanisms of polymodal signaling, such as nociception, in more complex organisms.
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C. elegans sensory neurons usually respond to several stimuli, so sensory integration starts within the sensory neurons.
“As the sensory neurons of C. elegans generally respond to multiple stimuli, sensory integration begins within the sensory neurons themselves25,26.”
From Whole-animal connectomes of both Caenorhabditis elegans sexes (2019) · cites this paper as [25]
The Abstract reports that C. elegans PHA/PHB neurons respond to multiple stimuli and use intracellular and intercellular pathways to process them; the Discussion describes encoding and discrimination in those neurons. This supports sensory processing within particular sensory neurons, but the paper does not establish that C. elegans sensory neurons generally respond to multiple stimuli or that integration always begins within them. (LLM, conf=0.82)
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Whole-animal connectomes of both Caenorhabditis elegans sexes
Cook, S. J., Jarrell, T. A., Brittin, C. A., Wang, Y., Bloniarz, A. E., Yakovlev, M. A., Nguyen, K. C. Q., Tang, L. T.-H., Bayer, E. A., Duerr, J. S., et al. (2019) · Nature · doi:10.1038/s41586-019-1352-7 · Cited by 921 · see citing works
Li, S., Pan, H., Tan, C., Sun, Y., Song, Y., Zhang, X., Yang, W., Wang, X., Li, D., Dai, Y., et al. (2018) · Stem Cell Reports · doi:10.1016/j.stemcr.2018.01.013 · Cited by 106 · see citing works
- Authors
- Zou, W., Cheng, H., Li, S., Yue, X., Xue, Y., Chen, S., & Kang, L.
- Affiliations
- Zhejiang University (CN)
- Fuzhou University (CN)
- Corresponding author
- Chen, Sixi
- Kang, Lijun
- Venue
- Scientific Reports
- Published
- 2017-02-14
- Volume
- 7
- Issue
- 1
- Pages
- 42295-42295
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC5307315
- OpenAlex
- W2588937528
- Cited by
- 37
- References
- 2
- Citations by year
- 2025: 2 · 2024: 3 · 2023: 2 · 2022: 4 · 2021: 6 · 2020: 5 · 2019: 4 · 2018: 8 · 2017: 3
- FWCI
- 2.68
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (OD010440, P40OD010440)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
- Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
- Keywords
- Caenorhabditis elegans, osm-9, copper removal, neuropeptide signaling, mechanical stimulation, nociception, calcium imaging, sensory discrimination
- MeSH terms
- Animals, Calcium, Copper, Extracellular Space, Ion Channels, Nerve Tissue Proteins, Neurons, Odorants, Physical Stimulation, Sensory Receptor Cells, Touch, Signal Transduction, Caenorhabditis elegans, Caenorhabditis elegans Proteins, Intracellular Space, TRPV Cation Channels
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