- Title
- Mammalian TRP on channels are insensitive to membrane stretch
- Creator
- Nikolaev, Yury A.; Cox, Charles D.; Ridone, Pietro; Rohde, Paul R.; Cordero-Morales, Julio F.; Vasquez, Valeria; Laver, Derek R.; Martinac, Boris
- Relation
- NHMRC.1108013 http://purl.org/au-research/grants/nhmrc/1108013
- Relation
- Journal of Cell Science Vol. 132, no. jcs238360
- Publisher Link
- http://dx.doi.org/10.1242/jcs.238360
- Publisher
- The Company of Biologists
- Resource Type
- journal article
- Date
- 2019
- Description
- TRP channels of the transient receptor potential ion channel superfamily are involved in a wide variety of mechanosensory processes, including touch sensation, pain, blood pressure regulation, bone loading and detection of cerebrospinal fluid flow. However, in many instances it is unclear whether TRP channels are the primary transducers of mechanical force in these processes. In this study, we tested stretch activation of eleven TRP channels from six mammalian subfamilies. We found that these TRP channels were insensitive to short membrane stretches in cellular systems. Furthermore, we purified TRPC6 and demonstrated its insensitivity to stretch in liposomes, an artificial bilayer system free from cellular components. Additionally, we demonstrated that, when expressed in C. elegans neurons, mouse TRPC6 restores the mechanoresponse of a touch insensitive mutant but requires diacylglycerol for activation. These results strongly suggest that the mammalian members of the TRP ion channel family are insensitive to tension induced by cell membrane stretching and, thus, are more likely to be activated by cytoplasmic tethers or downstream components and to act as amplifiers of cellular mechanosensory signaling cascades.
- Subject
- TRP ion channels; TRPC6; mechanosensitive channels; ion channel reconstitution; mechanotransduction
- Identifier
- http://hdl.handle.net/1959.13/1429144
- Identifier
- uon:38687
- Identifier
- ISSN:0021-9533
- Rights
- This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.
- Language
- eng
- Full Text
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