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Sendetski M, Wedel S, Furutani K, Hahnefeld L, Angioni C, Heering J, Zimmer B, Pierre S, Banica AM, Scholich K, Tunaru S, Geisslinger G, Ji RR, Sisignano M. Oleic acid released by sensory neurons inhibits TRPV1-mediated thermal hypersensitivity via GPR40. iScience 2024; 27:110552. [PMID: 39171292 PMCID: PMC11338150 DOI: 10.1016/j.isci.2024.110552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 06/17/2024] [Accepted: 07/17/2024] [Indexed: 08/23/2024] Open
Abstract
Noxious stimuli activate nociceptive sensory neurons, causing action potential firing and the release of diverse signaling molecules. Several peptides have already been identified to be released by sensory neurons and shown to modulate inflammatory responses and inflammatory pain. However, it is still unclear whether lipid mediators can be released upon sensory neuron activation to modulate intercellular communication. Here, we analyzed the lipid secretome of capsaicin-stimulated nociceptive neurons with LC-HRMS, revealing that oleic acid is strongly released from sensory neurons by capsaicin. We further demonstrated that oleic acid inhibits capsaicin-induced calcium transients in sensory neurons and reverses bradykinin-induced TRPV1 sensitization by a calcineurin (CaN) and GPR40 (FFAR1) dependent pathway. Additionally, oleic acid alleviated zymosan-mediated thermal hypersensitivity via the GPR40, suggesting that the capsaicin-mediated oleic acid release from sensory neurons acts as a protective and feedback mechanism, preventing sensory neurons from nociceptive overstimulation via the GPR40/CaN/TRPV1-axis.
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Affiliation(s)
- Maksim Sendetski
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
| | - Saskia Wedel
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
| | - Kenta Furutani
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
| | - Lisa Hahnefeld
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
- Fraunhofer Cluster of Excellence for Immune-Mediated Diseases (CIMD), Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Carlo Angioni
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Jan Heering
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Béla Zimmer
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
| | - Sandra Pierre
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
| | - Alexandra-Maria Banica
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Splaiul Independentei 296, 060031 Bucharest, Romania
| | - Klaus Scholich
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Sorin Tunaru
- Cell Signalling Research Group, Institute of Biochemistry of the Romanian Academy, Splaiul Independentei 296, 060031 Bucharest, Romania
| | - Gerd Geisslinger
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
- Fraunhofer Cluster of Excellence for Immune-Mediated Diseases (CIMD), Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
| | - Ru-Rong Ji
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
- Departments of Cell Biology and Neurobiology, Duke University Medical Center, Durham, NC, USA
| | - Marco Sisignano
- Goethe University Frankfurt, University Hospital, Institute of Clinical Pharmacology, Theodor-Stern-Kai 7, 60590 Frankfurt Am Main, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
- Fraunhofer Cluster of Excellence for Immune-Mediated Diseases (CIMD), Theodor Stern-Kai 7, 60596 Frankfurt Am Main, Germany
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Pang JJ. The Variety of Mechanosensitive Ion Channels in Retinal Neurons. Int J Mol Sci 2024; 25:4877. [PMID: 38732096 PMCID: PMC11084373 DOI: 10.3390/ijms25094877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/16/2024] [Accepted: 04/20/2024] [Indexed: 05/13/2024] Open
Abstract
Alterations in intraocular and external pressure critically involve the pathogenesis of glaucoma, traumatic retinal injury (TRI), and other retinal disorders, and retinal neurons have been reported to express multiple mechanical-sensitive channels (MSCs) in recent decades. However, the role of MSCs in visual functions and pressure-related retinal conditions has been unclear. This review will focus on the variety and functional significance of the MSCs permeable to K+, Na+, and Ca2+, primarily including the big potassium channel (BK); the two-pore domain potassium channels TRAAK and TREK; Piezo; the epithelial sodium channel (ENaC); and the transient receptor potential channels vanilloid TRPV1, TRPV2, and TRPV4 in retinal photoreceptors, bipolar cells, horizontal cells, amacrine cells, and ganglion cells. Most MSCs do not directly mediate visual signals in vertebrate retinas. On the other hand, some studies have shown that MSCs can open in physiological conditions and regulate the activities of retinal neurons. While these data reasonably predict the crossing of visual and mechanical signals, how retinal light pathways deal with endogenous and exogenous mechanical stimulation is uncertain.
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Affiliation(s)
- Ji-Jie Pang
- Department of Ophthalmology, Baylor College of Medicine, Houston, TX 77030, USA
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Bourn JJ, Dorrity MW. Degrees of freedom: temperature's influence on developmental rate. Curr Opin Genet Dev 2024; 85:102155. [PMID: 38335718 DOI: 10.1016/j.gde.2024.102155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/14/2024] [Accepted: 01/15/2024] [Indexed: 02/12/2024]
Abstract
Temperature exerts a fundamental influence across scales of biology, from the biophysical nature of molecules, to the sensitivity of cells, and the coordinated progression of development in embryos. Species-specific developmental rates and temperature-induced acceleration of development indicate that these sensing mechanisms are harnessed to influence developmental dynamics. Tracing how temperature sensitivity propagates through biological scales to influence the pace of development can therefore reveal how embryogenesis remains robust to environmental influences. Cellular protein homeostasis (proteostasis), and cellular metabolic rate are linked to both temperature-induced and species-specific developmental tempos in specific cell types, hinting toward generalized mechanisms of timing control. New methods to extract timing information from single-cell profiling experiments are driving further progress in understanding how mechanisms of temperature sensitivity can direct cell-autonomous responses, coordination across cell types, and evolutionary modifications of developmental timing.
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Affiliation(s)
- Jess J Bourn
- Structural and Computational Biology, European Molecular Biology Laboratory, Heidelberg, Germany. https://twitter.com/@bournsupremacy
| | - Michael W Dorrity
- Structural and Computational Biology, European Molecular Biology Laboratory, Heidelberg, Germany.
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