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Landry C, Nazar R, Simon M, Genest F, Giguère FL, Lepore F, Frasnelli J. Behavioural evidence for enhanced olfactory and trigeminal perception in congenital hearing loss. Eur J Neurosci 2024; 59:434-445. [PMID: 38185810 DOI: 10.1111/ejn.16216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 11/05/2023] [Accepted: 11/20/2023] [Indexed: 01/09/2024]
Abstract
Sensory deprivation, especially hearing loss (HL), offers a valuable model for studying neuroplasticity in the human brain and adaptive behaviours that support the daily lives of those with limited or absent sensory input. The study of olfactory function is particularly important as it is an understudied aspect of sensory deprivation. This study aimed to compare the effects of congenital HL on olfactory capacity by using psychophysical tasks. Methodological concerns from previous studies regarding the onset of HL and cognitive assessments were addressed. We recruited 11 individuals with severe-to-profound sensorineural HL (SNHL) since birth and 11 age- and sex-matched typical hearing non-signers. We used standardized neuropsychological tests to assess typical cognition among participants with SNHL. We evaluated olfactory functions by assessing olfactory detection threshold, odour discrimination and odour identification. Hearing-impaired participants outperformed their typical hearing counterparts in olfactory tasks. We further evaluated the accuracy and response time in identifying and localizing odours to disentangle olfactory sensitivity from trigeminal system sensitivity. Participants with SNHL demonstrated higher sensitivity to both the identification and localization tasks. These findings suggest that congenital SNHL is associated with enhanced higher-level olfactory processing and increased trigeminal sensitivity.
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Affiliation(s)
- Catherine Landry
- Département de Psychologie, Université de Montréal, Montréal, QC, Canada
| | - Rim Nazar
- Département de Psychologie, Université de Montréal, Montréal, QC, Canada
- Research Institute of the MUHC, Montréal, QC, Canada
| | - Marie Simon
- Département de Psychologie, Université de Montréal, Montréal, QC, Canada
| | - François Genest
- Département de Psychologie, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Fanny Lécuyer Giguère
- Département de Psychologie, Université de Montréal, Montréal, QC, Canada
- Centre de recherche de l'hôpital Sacré-Coeur de Montréal, Montréal, QC, Canada
| | - Franco Lepore
- Département de Psychologie, Université de Montréal, Montréal, QC, Canada
| | - Johannes Frasnelli
- Département de Psychologie, Université de Montréal, Montréal, QC, Canada
- Centre de recherche de l'hôpital Sacré-Coeur de Montréal, Montréal, QC, Canada
- Département d'anatomie, Université du Québec à Trois-Rivières, Trois-Rivières, QC, Canada
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Gu L, Zhou M, Wei T, Yang H, Zhou Y. Extreme Membrane Tensile Loads Induce Half-Activation of the Thermosensitive TRPV1 Channel. J Phys Chem Lett 2022; 13:6306-6310. [PMID: 35792613 DOI: 10.1021/acs.jpclett.2c01206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Transient receptor potential (TRP) channels are sensors for a wide range of cellular and environmental signals, but elucidating how these channels convert a wide range of physical and chemical stimuli into channel opening is essential to understanding their normal function. Here, half-activation of thermosensitive TRPV1 channel under extreme membrane stretching from blast loads was provided by molecular dynamics simulations. The results show that such extreme membrane stretch loading will only lead to half-activation of the TRPV1 channel: that is, the upper gate is open for high-speed stretching (>15m/s), but the lower gate is still closed. The corresponding activation threshold also depends on both the tensile speed and the area strain. This means that the direct mechanical gating of TRP channels in one step is unlikely to occur.
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Affiliation(s)
- Lingzhi Gu
- Institute of Chemical Materials, China Academy of Engineering and Physics, Mianyang 621900, China
| | - Mi Zhou
- Institute of Chemical Materials, China Academy of Engineering and Physics, Mianyang 621900, China
| | - Tong Wei
- Institute of Chemical Materials, China Academy of Engineering and Physics, Mianyang 621900, China
| | - Hong Yang
- Institute of Chemical Materials, China Academy of Engineering and Physics, Mianyang 621900, China
| | - Yang Zhou
- Institute of Chemical Materials, China Academy of Engineering and Physics, Mianyang 621900, China
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Boonen B, Startek JB, Milici A, López-Requena A, Beelen M, Callaerts P, Talavera K. Activation of Drosophila melanogaster TRPA1 Isoforms by Citronellal and Menthol. Int J Mol Sci 2021; 22:ijms222010997. [PMID: 34681657 PMCID: PMC8541009 DOI: 10.3390/ijms222010997] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The transient receptor potential ankyrin 1 (TRPA1) cation channels function as broadly-tuned sensors of noxious chemicals in many species. Recent studies identified four functional TRPA1 isoforms in Drosophila melanogaster (dTRPA1(A) to (D)), but their responses to non-electrophilic chemicals are yet to be fully characterized. METHODS We determined the behavioral responses of adult flies to the mammalian TRPA1 non-electrophilic activators citronellal and menthol, and characterized the effects of these compounds on all four dTRPA1 channel isoforms using intracellular Ca2+ imaging and whole-cell patch-clamp recordings. RESULTS Wild type flies avoided citronellal and menthol in an olfactory test and this behavior was reduced in dTrpA1 mutant flies. Both compounds activate all dTRPA1 isoforms in the heterologous expression system HEK293T, with the following sensitivity series: dTRPA1(C) = dTRPA1(D) > dTRPA1(A) ≫ dTRPA1(B) for citronellal and dTRPA1(A) > dTRPA1(D) > dTRPA1(C) > dTRPA1(B) for menthol. CONCLUSIONS dTrpA1 was required for the normal avoidance of Drosophila melanogaster towards citronellal and menthol. All dTRPA1 isoforms are activated by both compounds, but the dTRPA1(B) is consistently the least sensitive. We discuss how these findings may guide further studies on the physiological roles and the structural bases of chemical sensitivity of TRPA1 channels.
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Affiliation(s)
- Brett Boonen
- Leuven Center for Brain & Disease Research, Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB-KU 3000 Leuven, Belgium; (B.B.); (J.B.S.); (A.M.); (A.L.-R.)
| | - Justyna B. Startek
- Leuven Center for Brain & Disease Research, Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB-KU 3000 Leuven, Belgium; (B.B.); (J.B.S.); (A.M.); (A.L.-R.)
| | - Alina Milici
- Leuven Center for Brain & Disease Research, Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB-KU 3000 Leuven, Belgium; (B.B.); (J.B.S.); (A.M.); (A.L.-R.)
| | - Alejandro López-Requena
- Leuven Center for Brain & Disease Research, Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB-KU 3000 Leuven, Belgium; (B.B.); (J.B.S.); (A.M.); (A.L.-R.)
| | - Melissa Beelen
- Laboratory of Behavioral and Developmental Genetics, Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium; (M.B.); (P.C.)
| | - Patrick Callaerts
- Laboratory of Behavioral and Developmental Genetics, Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium; (M.B.); (P.C.)
| | - Karel Talavera
- Leuven Center for Brain & Disease Research, Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, VIB-KU 3000 Leuven, Belgium; (B.B.); (J.B.S.); (A.M.); (A.L.-R.)
- Correspondence: ; Tel.: +32-16-330-469
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Makarova AA, Ruchkina IN, Parfenov AI, Indeykina LK, Romashkina NV. The role of visceral hypersensitivity in the pathogenesis of irritable bowel syndrome. TERAPEVT ARKH 2021; 93:969-974. [DOI: 10.26442/00403660.2021.08.200916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Accepted: 09/04/2021] [Indexed: 11/22/2022]
Abstract
This research includes visceral sensitivity and its mechanisms involved in the development of irritable bowel syndrome. Visceral hypersensitivity occupies the key place. The research has the description of etiological factors that form visceral hypersensitivity and also visceral sensitivity instrumental research methods, based on the use of the balloon dilation. The research also has the schemes of drug therapy for irritable bowel syndrome meanwhile the special attention is paid to the possible use of the sorbed probiotics and psychopharmacological drugs.
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Abstract
Of all the oral sensations that are experienced, "metallic" is one that is rarely reported in healthy participants. So why, then, do chemotherapy patients so frequently report that "metallic" sensations overpower and interfere with their enjoyment of food and drink? This side-effect of chemotherapy-often referred to (e.g., by patients) as "metal mouth"-can adversely affect their appetite, resulting in weight loss, which potentially endangers (or at the very least slows) their recovery. The etiology of "metal mouth" is poorly understood, and current management strategies are largely unevidenced. As a result, patients continue to suffer as a result of this poorly understood phenomenon. Here, we provide our perspective on the issue, outlining the evidence for a range of possible etiologies, and highlighting key research questions. We explore the evidence for "metallic" as a putative taste, and whether "metal mouth" might therefore be a form of phantageusia, perhaps similar to already-described "release-of-inhibition" phenomena. We comment on the possibility that "metal mouth" may simply be a direct effect of chemotherapy drugs. We present the novel theory that "metal mouth" may be linked to chemotherapy-induced sensitization of TRPV1. Finally, we discuss the evidence for retronasal olfaction of lipid oxidation products in the etiology of "metal mouth." This article seeks principally to guide much-needed future research which will hopefully one day provide a basis for the development of novel supportive therapies for future generations of patients undergoing chemotherapy.
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Affiliation(s)
- Alastair J M Reith
- Oxford Medical School, Medical Sciences Division, John Radcliffe Hospital, UK
| | - Charles Spence
- Crossmodal Research Laboratory, Department of Experimental Psychology, Oxford University, UK
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Startek JB, Voets T, Talavera K. To flourish or perish: evolutionary TRiPs into the sensory biology of plant-herbivore interactions. Pflugers Arch 2018; 471:213-236. [PMID: 30229297 DOI: 10.1007/s00424-018-2205-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 08/31/2018] [Accepted: 09/06/2018] [Indexed: 12/18/2022]
Abstract
The interactions between plants and their herbivores are highly complex systems generating on one side an extraordinary diversity of plant protection mechanisms and on the other side sophisticated consumer feeding strategies. Herbivores have evolved complex, integrative sensory systems that allow them to distinguish between food sources having mere bad flavors from the actually toxic ones. These systems are based on the senses of taste, olfaction and somatosensation in the oral and nasal cavities, and on post-ingestive chemosensory mechanisms. The potential ability of plant defensive chemical traits to induce tissue damage in foragers is mainly encoded in the latter through chemesthetic sensations such as burning, pain, itch, irritation, tingling, and numbness, all of which induce innate aversive behavioral responses. Here, we discuss the involvement of transient receptor potential (TRP) channels in the chemosensory mechanisms that are at the core of complex and fascinating plant-herbivore ecological networks. We review how "sensory" TRPs are activated by a myriad of plant-derived compounds, leading to cation influx, membrane depolarization, and excitation of sensory nerve fibers of the oronasal cavities in mammals and bitter-sensing cells in insects. We also illustrate how TRP channel expression patterns and functionalities vary between species, leading to intriguing evolutionary adaptations to the specific habitats and life cycles of individual organisms.
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Affiliation(s)
- Justyna B Startek
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, Campus Gasthuisberg O&N1 bus 802, 3000, Leuven, Belgium. .,VIB Center for Brain & Disease Research, Leuven, Belgium.
| | - Thomas Voets
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, Campus Gasthuisberg O&N1 bus 802, 3000, Leuven, Belgium.,VIB Center for Brain & Disease Research, Leuven, Belgium
| | - Karel Talavera
- Laboratory of Ion Channel Research, Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, Campus Gasthuisberg O&N1 bus 802, 3000, Leuven, Belgium.,VIB Center for Brain & Disease Research, Leuven, Belgium
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Balemans D, Boeckxstaens GE, Talavera K, Wouters MM. Transient receptor potential ion channel function in sensory transduction and cellular signaling cascades underlying visceral hypersensitivity. Am J Physiol Gastrointest Liver Physiol 2017; 312:G635-G648. [PMID: 28385695 DOI: 10.1152/ajpgi.00401.2016] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 03/21/2017] [Accepted: 04/01/2017] [Indexed: 01/31/2023]
Abstract
Visceral hypersensitivity is an important mechanism underlying increased abdominal pain perception in functional gastrointestinal disorders including functional dyspepsia, irritable bowel syndrome, and inflammatory bowel disease in remission. Although the exact pathophysiological mechanisms are poorly understood, recent studies described upregulation and altered functions of nociceptors and their signaling pathways in aberrant visceral nociception, in particular the transient receptor potential (TRP) channel family. A variety of TRP channels are present in the gastrointestinal tract (TRPV1, TRPV3, TRPV4, TRPA1, TRPM2, TRPM5, and TRPM8), and modulation of their function by increased activation or sensitization (decreased activation threshold) or altered expression in visceral afferents have been reported in visceral hypersensitivity. TRP channels directly detect or transduce osmotic, mechanical, thermal, and chemosensory stimuli. In addition, pro-inflammatory mediators released in tissue damage or inflammation can activate receptors of the G protein-coupled receptor superfamily leading to TRP channel sensitization and activation, which amplify pain and neurogenic inflammation. In this review, we highlight the present knowledge on the functional roles of neuronal TRP channels in visceral hypersensitivity and discuss the signaling pathways that underlie TRP channel modulation. We propose that a better understanding of TRP channels and their modulators may facilitate the development of more selective and effective therapies to treat visceral hypersensitivity.
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Affiliation(s)
- Dafne Balemans
- Translational Research Center for Gastrointestinal Disorders, University of Leuven, Leuven, Belgium; and
| | - Guy E Boeckxstaens
- Translational Research Center for Gastrointestinal Disorders, University of Leuven, Leuven, Belgium; and
| | - Karel Talavera
- Laboratory of Ion Channel Research and TRP Research Platform Leuven, Department of Cellular and Molecular Medicine, University of Leuven, Leuven Belgium
| | - Mira M Wouters
- Translational Research Center for Gastrointestinal Disorders, University of Leuven, Leuven, Belgium; and
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Allais L, De Smet R, Verschuere S, Talavera K, Cuvelier CA, Maes T. Transient Receptor Potential Channels in Intestinal Inflammation: What Is the Impact of Cigarette Smoking? Pathobiology 2016; 84:1-15. [DOI: 10.1159/000446568] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 05/02/2016] [Indexed: 11/19/2022] Open
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