1
|
Nair VG, Srinandan CS, Rajesh YBRD, Narbhavi D, Anupriya A, Prabhusaran N, Nagarajan S. Biogenic amine tryptamine in human vaginal probiotic isolates mediates matrix inhibition and thwarts uropathogenic E. coli biofilm. Sci Rep 2024; 14:15387. [PMID: 38965339 PMCID: PMC11224256 DOI: 10.1038/s41598-024-65780-0] [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: 03/15/2024] [Accepted: 06/24/2024] [Indexed: 07/06/2024] Open
Abstract
Probiotics offer a promising prophylactic approach against various pathogens and represent an alternative strategy to combat biofilm-related infections. In this study, we isolated vaginal commensal microbiota from 54 healthy Indian women to investigate their probiotic traits. We primarily explored the ability of cell-free supernatant (CFS) from Lactobacilli to prevent Uropathogenic Escherichia coli (UPEC) colonization and biofilm formation. Our findings revealed that CFS effectively reduced UPEC's swimming and swarming motility, decreased cell surface hydrophobicity, and hindered matrix production by downregulating specific genes (fimA, fimH, papG, and csgA). Subsequent GC-MS analysis identified Tryptamine, a monoamine compound, as the potent bioactive substance from Lactobacilli CFS, inhibiting UPEC biofilms with an MBIC of 4 µg/ml and an MBEC of 8 µg/ml. Tryptamine induced significant changes in E. coli colony biofilm morphology, transitioning from the Red, Dry, and Rough (RDAR) to the Smooth and White phenotype, indicating reduced extracellular matrix production. Biofilm time-kill assays demonstrated a four-log reduction in UPEC viability when treated with Tryptamine, highlighting its potent antibacterial properties, comparable to CFS treatment. Biofilm ROS assays indicated a significant elevation in ROS generation within UPEC biofilms, suggesting a potential antibacterial mechanism. Gene expression studies with Tryptamine-treated samples showed a reduction in expression of curli gene (csgA), consistent with CFS treatment. This study underscores the potential of Tryptamine from probiotic Lactobacilli CFS as a promising antibiofilm agent against UPEC biofilms.
Collapse
Affiliation(s)
- Veena G Nair
- Microbial Biofilm Lab, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, Tamil Nadu, 613401, India
- Antimicrobial Resistance Lab, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, Tamil Nadu, 613401, India
| | - C S Srinandan
- Microbial Biofilm Lab, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, Tamil Nadu, 613401, India
| | - Y B R D Rajesh
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, 613 401, India
| | - Dhiviya Narbhavi
- Department of Obstetrics and Gynaecology, TSRMMCH&RC, Tiruchirappalli, Tamil Nadu, India
| | - A Anupriya
- Department of Microbiology, TSRMMCH&RC, Tiruchirappalli, Tamil Nadu, India
| | - N Prabhusaran
- Research Faculty, Institutional Research Board TSRMMCH&RC, Tiruchirappalli, Tamil Nadu, India
| | - Saisubramanian Nagarajan
- Antimicrobial Resistance Lab, Centre for Research in Infectious Diseases, School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, Tamil Nadu, 613401, India.
| |
Collapse
|
2
|
Nicoli A, Weber V, Bon C, Steuer A, Gustincich S, Gainetdinov RR, Lang R, Espinoza S, Di Pizio A. Structure-Based Discovery of Mouse Trace Amine-Associated Receptor 5 Antagonists. J Chem Inf Model 2023; 63:6667-6680. [PMID: 37847527 PMCID: PMC10647090 DOI: 10.1021/acs.jcim.3c00755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Indexed: 10/18/2023]
Abstract
Trace amine-associated receptors (TAARs) were discovered in 2001 as new members of class A G protein-coupled receptors (GPCRs). With the only exception of TAAR1, TAAR members (TAAR2-9, also known as noncanonical olfactory receptors) were originally described exclusively in the olfactory epithelium and believed to mediate the innate perception of volatile amines. However, most noncanonical olfactory receptors are still orphan receptors. Given its recently discovered nonolfactory expression and therapeutic potential, TAAR5 has been the focus of deorphanization campaigns that led to the discovery of a few druglike antagonists. Here, we report four novel TAAR5 antagonists identified through high-throughput screening, which, along with the four ligands published in the literature, constituted our starting point to design a computational strategy for the identification of TAAR5 ligands. We developed a structure-based virtual screening protocol that allowed us to identify three new TAAR5 antagonists with a hit rate of 10%. Despite lacking an experimental structure, we accurately modeled the TAAR5 binding site by integrating comparative sequence- and structure-based analyses of serotonin receptors with homology modeling and side-chain optimization. In summary, we have identified seven new TAAR5 antagonists that could serve as lead candidates for the development of new treatments for depression, anxiety, and neurodegenerative diseases.
Collapse
Affiliation(s)
- Alessandro Nicoli
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, 85354 Freising, Germany
- Chemoinformatics
and Protein Modelling, Department of Molecular Life Sciences, School
of Life Sciences, Technical University of
Munich, 85354 Freising, Germany
| | - Verena Weber
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, 85354 Freising, Germany
- Institute
for Advanced Simulations (IAS)-5/Institute for Neuroscience and Medicine
(INM)-9, Forschungszentrum Jülich, 52428 Jülich, Germany
- Faculty
of Mathematics, Computer Science and Natural Sciences, RWTH Aachen, Aachen, 52062 Germany
| | - Carlotta Bon
- Istituto
Italiano di Tecnologia, 16163 Genova, Italy
| | - Alexandra Steuer
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, 85354 Freising, Germany
- Chemoinformatics
and Protein Modelling, Department of Molecular Life Sciences, School
of Life Sciences, Technical University of
Munich, 85354 Freising, Germany
| | | | - Raul R. Gainetdinov
- Institute
of Translational Biomedicine and Saint Petersburg University Hospital,
Saint Petersburg State University, Saint Petersburg 199034, Russia
| | - Roman Lang
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, 85354 Freising, Germany
| | - Stefano Espinoza
- Istituto
Italiano di Tecnologia, 16163 Genova, Italy
- Dipartimento
di Scienze della Salute, Università
del Piemonte Orientale, 28100 Novara, Italy
| | - Antonella Di Pizio
- Leibniz
Institute for Food Systems Biology at the Technical University of
Munich, 85354 Freising, Germany
- Chemoinformatics
and Protein Modelling, Department of Molecular Life Sciences, School
of Life Sciences, Technical University of
Munich, 85354 Freising, Germany
| |
Collapse
|
3
|
Massey WJ, Kay KE, Jaramillo TC, Horak AJ, Cao S, Osborn LJ, Banerjee R, Mrdjen M, Hamoudi MK, Silver DJ, Burrows AC, Brown AL, Reizes O, Lathia JD, Wang Z, Hazen SL, Brown JM. Metaorganismal choline metabolism shapes olfactory perception. J Biol Chem 2023; 299:105299. [PMID: 37777156 PMCID: PMC10630631 DOI: 10.1016/j.jbc.2023.105299] [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: 12/20/2021] [Revised: 09/18/2023] [Accepted: 09/23/2023] [Indexed: 10/02/2023] Open
Abstract
Microbes living in the intestine can regulate key signaling processes in the central nervous system that directly impact brain health. This gut-brain signaling axis is partially mediated by microbe-host-dependent immune regulation, gut-innervating neuronal communication, and endocrine-like small molecule metabolites that originate from bacteria to ultimately cross the blood-brain barrier. Given the mounting evidence of gut-brain crosstalk, a new therapeutic approach of "psychobiotics" has emerged, whereby strategies designed to primarily modify the gut microbiome have been shown to improve mental health or slow neurodegenerative diseases. Diet is one of the most powerful determinants of gut microbiome community structure, and dietary habits are associated with brain health and disease. Recently, the metaorganismal (i.e., diet-microbe-host) trimethylamine N-oxide (TMAO) pathway has been linked to the development of several brain diseases including Alzheimer's, Parkinson's, and ischemic stroke. However, it is poorly understood how metaorganismal TMAO production influences brain function under normal physiological conditions. To address this, here we have reduced TMAO levels by inhibiting gut microbe-driven choline conversion to trimethylamine (TMA), and then performed comprehensive behavioral phenotyping in mice. Unexpectedly, we find that TMAO is particularly enriched in the murine olfactory bulb, and when TMAO production is blunted at the level of bacterial choline TMA lyase (CutC/D), olfactory perception is altered. Taken together, our studies demonstrate a previously underappreciated role for the TMAO pathway in olfactory-related behaviors.
Collapse
Affiliation(s)
- William J Massey
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA
| | - Kristen E Kay
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA
| | - Thomas C Jaramillo
- Rodent Behavior Core, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Anthony J Horak
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Shijie Cao
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Lucas J Osborn
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA
| | - Rakhee Banerjee
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Marko Mrdjen
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Michael K Hamoudi
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Daniel J Silver
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, USA; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Amy C Burrows
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Amanda L Brown
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Ofer Reizes
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Justin D Lathia
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Zeneng Wang
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA
| | - Stanley L Hazen
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Department of Cardiovascular Medicine, Heart Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - J Mark Brown
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, Ohio, USA; Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA.
| |
Collapse
|
4
|
Kuroda S, Nakaya-Kishi Y, Tatematsu K, Hinuma S. Human Olfactory Receptor Sensor for Odor Reconstitution. SENSORS (BASEL, SWITZERLAND) 2023; 23:6164. [PMID: 37448013 DOI: 10.3390/s23136164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/29/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023]
Abstract
Among the five human senses, light, sound, and force perceived by the eye, ear, and skin, respectively are physical phenomena, and therefore can be easily measured and expressed as objective, univocal, and simple digital data with physical quantity. However, as taste and odor molecules perceived by the tongue and nose are chemical phenomena, it has been difficult to express them as objective and univocal digital data, since no reference chemicals can be defined. Therefore, while the recording, saving, transmitting to remote locations, and replaying of human visual, auditory, and tactile information as digital data in digital devices have been realized (this series of data flow is defined as DX (digital transformation) in this review), the DX of human taste and odor information is not yet in the realization stage. Particularly, since there are at least 400,000 types of odor molecules and an infinite number of complex odors that are mixtures of these molecules, it has been considered extremely difficult to realize "human olfactory DX" by converting all odors perceived by human olfaction into digital data. In this review, we discuss the current status and future prospects of the development of "human olfactory DX", which we believe can be realized by utilizing odor sensors that employ the olfactory receptors (ORs) that support human olfaction as sensing molecules (i.e., human OR sensor).
Collapse
Affiliation(s)
- Shun'ichi Kuroda
- Department of Biomolecular Science and Reaction, SANKEN, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- R&D Center, Komi-Hakko Corp, 3F Osaka University Technoalliance C Bldg, 2-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Yukiko Nakaya-Kishi
- R&D Center, Komi-Hakko Corp, 3F Osaka University Technoalliance C Bldg, 2-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Kenji Tatematsu
- Department of Biomolecular Science and Reaction, SANKEN, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
- R&D Center, Komi-Hakko Corp, 3F Osaka University Technoalliance C Bldg, 2-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shuji Hinuma
- Department of Biomolecular Science and Reaction, SANKEN, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| |
Collapse
|
5
|
Hummel T, Power Guerra N, Gunder N, Hähner A, Menzel S. Olfactory Function and Olfactory Disorders. Laryngorhinootologie 2023; 102:S67-S92. [PMID: 37130532 PMCID: PMC10184680 DOI: 10.1055/a-1957-3267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The sense of smell is important. This became especially clear to patients with infection-related olfactory loss during the SARS-CoV-2 pandemic. We react, for example, to the body odors of other humans. The sense of smell warns us of danger, and it allows us to perceive flavors when eating and drinking. In essence, this means quality of life. Therefore, anosmia must be taken seriously. Although olfactory receptor neurons are characterized by regenerative capacity, anosmia is relatively common with about 5 % of anosmic people in the general population. Olfactory disorders are classified according to their causes (e. g., infections of the upper respiratory tract, traumatic brain injury, chronic rhinosinusitis, age) with the resulting different therapeutic options and prognoses. Thorough history taking is therefore important. A wide variety of tools are available for diagnosis, ranging from short screening tests and detailed multidimensional test procedures to electrophysiological and imaging methods. Thus, quantitative olfactory disorders are easily assessable and traceable. For qualitative olfactory disorders such as parosmia, however, no objectifying diagnostic procedures are currently available. Therapeutic options for olfactory disorders are limited. Nevertheless, there are effective options consisting of olfactory training as well as various additive drug therapies. The consultation and the competent discussion with the patients are of major importance.
Collapse
Affiliation(s)
- T Hummel
- Interdisziplinäres Zentrum Riechen und Schmecken, HNO Klinik, TU Dresden
| | - N Power Guerra
- Rudolf-Zenker-Institut für Experimentelle Chirurgie, Medizinische Universität Rostock, Rostock
| | - N Gunder
- Universitäts-HNO Klinik Dresden, Dresden
| | - A Hähner
- Interdisziplinäres Zentrum Riechen und Schmecken, HNO Klinik, TU Dresden
| | - S Menzel
- Interdisziplinäres Zentrum Riechen und Schmecken, HNO Klinik, TU Dresden
| |
Collapse
|
6
|
Fan Y, Ying J, Ma H, Cui H. Microbiota-related metabolites fueling the understanding of ischemic heart disease. IMETA 2023; 2:e94. [PMID: 38868424 PMCID: PMC10989774 DOI: 10.1002/imt2.94] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/04/2023] [Accepted: 01/21/2023] [Indexed: 06/14/2024]
Abstract
Up-to-date knowledge of gut microbial taxa associated with ischemic heart disease (IHD). Microbial metabolites for mechanistic dissection of IHD pathology. Microbiome-based therapies in IHD prevention and treatment.
Collapse
Affiliation(s)
- Yong Fan
- Key Laboratory of Precision Medicine for Atherosclerotic Diseases of Zhejiang ProvinceNingboChina
| | - Jiajun Ying
- Key Laboratory of Precision Medicine for Atherosclerotic Diseases of Zhejiang ProvinceNingboChina
- Department of Cardiology, Ningbo First HospitalNingbo UniversityNingboChina
| | - Hongchuang Ma
- Key Laboratory of Precision Medicine for Atherosclerotic Diseases of Zhejiang ProvinceNingboChina
| | - Hanbin Cui
- Key Laboratory of Precision Medicine for Atherosclerotic Diseases of Zhejiang ProvinceNingboChina
- Department of Cardiology, Ningbo First HospitalNingbo UniversityNingboChina
- Ningbo Clinical Research Center for Cardiovascular DiseaseNingboChina
| |
Collapse
|
7
|
Duizer C, de Zoete MR. The Role of Microbiota-Derived Metabolites in Colorectal Cancer. Int J Mol Sci 2023; 24:8024. [PMID: 37175726 PMCID: PMC10178193 DOI: 10.3390/ijms24098024] [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: 03/19/2023] [Revised: 04/25/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023] Open
Abstract
The impact of bacterial members of the microbiota on the development of colorectal cancer (CRC) has become clear in recent years. However, exactly how bacteria contribute to the development of cancer is often still up for debate. The impact of bacteria-derived metabolites, which can influence the development of CRC either in a promoting or inhibiting manner, is undeniable. Here, we discuss the effects of the most well-studied bacteria-derived metabolites associated with CRC, including secondary bile acids, short-chain fatty acids, trimethylamine-N-oxide and indoles. We show that the effects of individual metabolites on CRC development are often nuanced and dose- and location-dependent. In the coming years, the array of metabolites involved in CRC development will undoubtedly increase further, which will emphasize the need to focus on causation and mechanisms and the clearly defined roles of bacterial species within the microbiota.
Collapse
Affiliation(s)
| | - Marcel R. de Zoete
- Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands
| |
Collapse
|
8
|
Clark JT, Ganguly A, Ejercito J, Luy M, Dahanukar A, Ray A. Chemosensory detection of aversive concentrations of ammonia and basic volatile amines in insects. iScience 2022; 26:105777. [PMID: 36594011 PMCID: PMC9804102 DOI: 10.1016/j.isci.2022.105777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 09/09/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
Basic volatiles like ammonia are found in insect environments, and at high concentrations cause an atypical action potential burst, followed by inhibition in multiple classes of olfactory receptor neurons (ORNs) in Drosophila melanogaster. During the period of inhibition, ORNs are unable to fire action potentials to their ligands but continue to display receptor potentials. An increase in calcium is also observed in antennal cells of Drosophila and Aedes aegypti. In the gustatory system, ammonia inhibits sugar and salt responses in a dose-dependent manner. Other amines show similar effects in both gustatory and olfactory neurons, correlated with basicity. The concentrations that inhibit neurons reduce proboscis extension to sucrose in Drosophila. In Aedes, a brief exposure to volatile ammonia abolishes attraction to human skin odor for several minutes. These findings reveal an effect that prevents detection of attractive ligands in the olfactory and gustatory systems and has potential in insect control.
Collapse
Affiliation(s)
- Jonathan Trevorrow Clark
- Interdepartmental Neuroscience Program, University of California, Riverside, Riverside, CA 92521, USA
| | - Anindya Ganguly
- Interdepartmental Neuroscience Program, University of California, Riverside, Riverside, CA 92521, USA
| | - Jadrian Ejercito
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Matthew Luy
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Anupama Dahanukar
- Interdepartmental Neuroscience Program, University of California, Riverside, Riverside, CA 92521, USA,Department of Molecular, Cell and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA
| | - Anandasankar Ray
- Interdepartmental Neuroscience Program, University of California, Riverside, Riverside, CA 92521, USA,Department of Molecular, Cell and Systems Biology, University of California, Riverside, Riverside, CA 92521, USA,Corresponding author
| |
Collapse
|
9
|
Caniceiro AB, Bueschbell B, Schiedel AC, Moreira IS. Class A and C GPCR Dimers in Neurodegenerative Diseases. Curr Neuropharmacol 2022; 20:2081-2141. [PMID: 35339177 PMCID: PMC9886835 DOI: 10.2174/1570159x20666220327221830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 02/21/2022] [Accepted: 03/23/2022] [Indexed: 11/22/2022] Open
Abstract
Neurodegenerative diseases affect over 30 million people worldwide with an ascending trend. Most individuals suffering from these irreversible brain damages belong to the elderly population, with onset between 50 and 60 years. Although the pathophysiology of such diseases is partially known, it remains unclear upon which point a disease turns degenerative. Moreover, current therapeutics can treat some of the symptoms but often have severe side effects and become less effective in long-term treatment. For many neurodegenerative diseases, the involvement of G proteincoupled receptors (GPCRs), which are key players of neuronal transmission and plasticity, has become clearer and holds great promise in elucidating their biological mechanism. With this review, we introduce and summarize class A and class C GPCRs, known to form heterodimers or oligomers to increase their signalling repertoire. Additionally, the examples discussed here were shown to display relevant alterations in brain signalling and had already been associated with the pathophysiology of certain neurodegenerative diseases. Lastly, we classified the heterodimers into two categories of crosstalk, positive or negative, for which there is known evidence.
Collapse
Affiliation(s)
- Ana B. Caniceiro
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; ,These authors contributed equally to this work.
| | - Beatriz Bueschbell
- PhD Programme in Experimental Biology and Biomedicine, Institute for Interdisciplinary Research (IIIUC), University of Coimbra, Casa Costa Alemão, 3030-789 Coimbra, Portugal; ,These authors contributed equally to this work.
| | - Anke C. Schiedel
- Department of Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, D-53121 Bonn, Germany;
| | - Irina S. Moreira
- University of Coimbra, Department of Life Sciences, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal; ,Center for Neuroscience and Cell Biology, Center for Innovative Biomedicine and Biotechnology, 3004-504 Coimbra, Portugal,Address correspondence to this author at the Center for Neuroscience and Cell Biology, Center for Innovative Biomedicine and Biotechnology, 3004-504 Coimbra, Portugal; E-mail:
| |
Collapse
|
10
|
Evaluation of Approach to a Conspecific and Blood Biochemical Parameters in TAAR1 Knockout Mice. Brain Sci 2022; 12:brainsci12050614. [PMID: 35625001 PMCID: PMC9139149 DOI: 10.3390/brainsci12050614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/22/2022] [Accepted: 05/05/2022] [Indexed: 12/21/2022] Open
Abstract
It is known that the trace amine-associated receptor 1 (TAAR1) receptor is involved in limbic brain functions by regulating dopamine transmission and putative reward circuitry. Moreover, other TAARs are expressed in the olfactory system of all studied vertebrate species, sensing innate socially-relevant odors, including pheromones. Therefore, one can assume that TAARs may play a role in rodent social and sexual behavior. A comparative behavioral and biochemical analysis of TAAR1 knockout (TAAR1-KO) and wild-type mice is also important for the preliminary evaluation of the potential side effects of future TAAR1-based therapies. In our studies, we adapted a sexual incentive motivation test for mice to evaluate the sexual behavior of TAAR1-KO and wild-type mice. Previously, similar methods were primarily applied to rats. Furthermore, we measured testosterone and other biochemical parameters in the blood. As a result, we found only minimal alterations in all of the studied parameters. Thus, the lack of TAAR1 does not significantly affect sexual motivation and routine lipid and metabolic blood biochemical parameters, suggesting that future TAAR1-based therapies should have a favorable safety profile.
Collapse
|
11
|
Loo RL, Chan Q, Nicholson JK, Holmes E. Balancing the Equation: A Natural History of Trimethylamine and Trimethylamine- N-oxide. J Proteome Res 2022; 21:560-589. [PMID: 35142516 DOI: 10.1021/acs.jproteome.1c00851] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Trimethylamine (TMA) and its N-oxide (TMAO) are ubiquitous in prokaryote and eukaryote organisms as well as in the environment, reflecting their fundamental importance in evolutionary biology, and their diverse biochemical functions. Both metabolites have multiple biological roles including cell-signaling. Much attention has focused on the significance of serum and urinary TMAO in cardiovascular disease risk, yet this is only one of the many facets of a deeper TMA-TMAO partnership that reflects the significance of these metabolites in multiple biological processes spanning animals, plants, bacteria, and fungi. We report on analytical methods for measuring TMA and TMAO and attempt to critically synthesize and map the global functions of TMA and TMAO in a systems biology framework.
Collapse
Affiliation(s)
- Ruey Leng Loo
- Centre for Computational and Systems Medicine, Health Futures Institute, Murdoch University, 5 Robin Warren Drive, Perth, Western Australia 6150, Australia.,The Australian National Phenome Centre, Health Futures Institute, Murdoch University, 5 Robin Warren Drive, Perth, Western Australia 6150, Australia
| | - Queenie Chan
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London W2 1PG, United Kingdom.,MRC Centre for Environment and Health, School of Public Health, Imperial College London, London W2 1PG, United Kingdom
| | - Jeremy K Nicholson
- Centre for Computational and Systems Medicine, Health Futures Institute, Murdoch University, 5 Robin Warren Drive, Perth, Western Australia 6150, Australia.,The Australian National Phenome Centre, Health Futures Institute, Murdoch University, 5 Robin Warren Drive, Perth, Western Australia 6150, Australia.,Institute of Global Health Innovation, Imperial College London, Level 1, Faculty Building, South Kensington Campus, London SW7 2NA, United Kingdom
| | - Elaine Holmes
- Centre for Computational and Systems Medicine, Health Futures Institute, Murdoch University, 5 Robin Warren Drive, Perth, Western Australia 6150, Australia.,The Australian National Phenome Centre, Health Futures Institute, Murdoch University, 5 Robin Warren Drive, Perth, Western Australia 6150, Australia.,Nutrition Research, Department of Metabolism, Nutrition and Reproduction, Faculty of Medicine, Imperial College London, Sir Alexander Fleming Building, London SW7 2AZ, United Kingdom
| |
Collapse
|
12
|
Li B, Kamarck ML, Peng Q, Lim FL, Keller A, Smeets MAM, Mainland JD, Wang S. From musk to body odor: Decoding olfaction through genetic variation. PLoS Genet 2022; 18:e1009564. [PMID: 35113854 PMCID: PMC8812863 DOI: 10.1371/journal.pgen.1009564] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 12/01/2021] [Indexed: 12/30/2022] Open
Abstract
The olfactory system combines input from multiple receptor types to represent odor information, but there are few explicit examples relating olfactory receptor (OR) activity patterns to odor perception. To uncover these relationships, we performed genome-wide scans on odor-perception phenotypes for ten odors in 1000 Han Chinese and validated results for six of these odors in an ethnically diverse population (n = 364). In both populations, consistent with previous studies, we replicated three previously reported associations (β-ionone/OR5A1, androstenone/OR7D4, cis-3-hexen-1-ol/OR2J3 LD-band), but not for odors containing aldehydes, suggesting that olfactory phenotype/genotype studies are robust across populations. Two novel associations between an OR and odor perception contribute to our understanding of olfactory coding. First, we found a SNP in OR51B2 that associated with trans-3-methyl-2-hexenoic acid, a key component of human underarm odor. Second, we found two linked SNPs associated with the musk Galaxolide in a novel musk receptor, OR4D6, which is also the first human OR shown to drive specific anosmia to a musk compound. We noticed that SNPs detected for odor intensity were enriched with amino acid substitutions, implying functional changes of odor receptors. Furthermore, we also found that the derived alleles of the SNPs tend to be associated with reduced odor intensity, supporting the hypothesis that the primate olfactory gene repertoire has degenerated over time. This study provides information about coding for human body odor, and gives us insight into broader mechanisms of olfactory coding, such as how differential OR activation can converge on a similar percept.
Collapse
Affiliation(s)
- Bingjie Li
- CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
- Department of Skin and Cosmetics Research, Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Marissa L. Kamarck
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, United States of America
- Department of Neuroscience, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Qianqian Peng
- CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Fei-Ling Lim
- Unilever Research & Development, Colworth, United Kingdom
| | - Andreas Keller
- Laboratory of Neurogenetics and Behavior, The Rockefeller University, New York, New York State, United States of America
| | | | - Joel D. Mainland
- Monell Chemical Senses Center, Philadelphia, Pennsylvania, United States of America
- Department of Neuroscience, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Sijia Wang
- CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
- Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, China
| |
Collapse
|
13
|
Helsley RN, Miyata T, Kadam A, Varadharajan V, Sangwan N, Huang EC, Banerjee R, Brown AL, Fung KK, Massey WJ, Neumann C, Orabi D, Osborn LJ, Schugar RC, McMullen MR, Bellar A, Poulsen KL, Kim A, Pathak V, Mrdjen M, Anderson JT, Willard B, McClain CJ, Mitchell M, McCullough AJ, Radaeva S, Barton B, Szabo G, Dasarathy S, Garcia-Garcia JC, Rotroff DM, Allende DS, Wang Z, Hazen SL, Nagy LE, Brown JM. Gut microbial trimethylamine is elevated in alcohol-associated hepatitis and contributes to ethanol-induced liver injury in mice. eLife 2022; 11:e76554. [PMID: 35084335 PMCID: PMC8853661 DOI: 10.7554/elife.76554] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 12/31/2021] [Indexed: 11/13/2022] Open
Abstract
There is mounting evidence that microbes residing in the human intestine contribute to diverse alcohol-associated liver diseases (ALD) including the most deadly form known as alcohol-associated hepatitis (AH). However, mechanisms by which gut microbes synergize with excessive alcohol intake to promote liver injury are poorly understood. Furthermore, whether drugs that selectively target gut microbial metabolism can improve ALD has never been tested. We used liquid chromatography tandem mass spectrometry to quantify the levels of microbe and host choline co-metabolites in healthy controls and AH patients, finding elevated levels of the microbial metabolite trimethylamine (TMA) in AH. In subsequent studies, we treated mice with non-lethal bacterial choline TMA lyase (CutC/D) inhibitors to blunt gut microbe-dependent production of TMA in the context of chronic ethanol administration. Indices of liver injury were quantified by complementary RNA sequencing, biochemical, and histological approaches. In addition, we examined the impact of ethanol consumption and TMA lyase inhibition on gut microbiome structure via 16S rRNA sequencing. We show the gut microbial choline metabolite TMA is elevated in AH patients and correlates with reduced hepatic expression of the TMA oxygenase flavin-containing monooxygenase 3 (FMO3). Provocatively, we find that small molecule inhibition of gut microbial CutC/D activity protects mice from ethanol-induced liver injury. CutC/D inhibitor-driven improvement in ethanol-induced liver injury is associated with distinct reorganization of the gut microbiome and host liver transcriptome. The microbial metabolite TMA is elevated in patients with AH, and inhibition of TMA production from gut microbes can protect mice from ethanol-induced liver injury.
Collapse
Affiliation(s)
- Robert N Helsley
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
- Department of Pediatrics, Division of Pediatric Gastroenterology, Hepatology, and Nutrition, College of Medicine, University of KentuckyLexingtonUnited States
| | - Tatsunori Miyata
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Anagha Kadam
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Venkateshwari Varadharajan
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Naseer Sangwan
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Emily C Huang
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Rakhee Banerjee
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Amanda L Brown
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Kevin K Fung
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - William J Massey
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Chase Neumann
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Danny Orabi
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Lucas J Osborn
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Rebecca C Schugar
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Megan R McMullen
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Annette Bellar
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Kyle L Poulsen
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Adam Kim
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Vai Pathak
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Marko Mrdjen
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - James T Anderson
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Belinda Willard
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Craig J McClain
- Department of Medicine, University of LouisvilleLouisvilleUnited States
| | - Mack Mitchell
- Department of Internal Medicine, University of Texas Southwestern Medical CenterDallasUnited States
| | - Arthur J McCullough
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Svetlana Radaeva
- National Institute on Alcohol Abuse and AlcoholismBethesdaUnited States
| | - Bruce Barton
- Department of Population and Quantitative Health Sciences, University of Massachusetts Medical SchoolWorcesterUnited States
| | - Gyongyi Szabo
- Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical SchoolBostonUnited States
| | - Srinivasan Dasarathy
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | | | - Daniel M Rotroff
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Daniela S Allende
- Department of Anatomical Pathology, Cleveland ClinicClevelandUnited States
| | - Zeneng Wang
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Stanley L Hazen
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
- Department of Cardiovascular Medicine, Heart and Vascular and Thoracic Institute, Cleveland ClinicClevelandUnited States
| | - Laura E Nagy
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| | - Jonathan Mark Brown
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland ClinicClevelandUnited States
- Center for Microbiome and Human Health, Lerner Research Institute, Cleveland ClinicClevelandUnited States
| |
Collapse
|
14
|
Schugar RC, Gliniak CM, Osborn LJ, Massey W, Sangwan N, Horak A, Banerjee R, Orabi D, Helsley RN, Brown AL, Burrows A, Finney C, Fung KK, Allen FM, Ferguson D, Gromovsky AD, Neumann C, Cook K, McMillan A, Buffa JA, Anderson JT, Mehrabian M, Goudarzi M, Willard B, Mak TD, Armstrong AR, Swanson G, Keshavarzian A, Garcia-Garcia JC, Wang Z, Lusis AJ, Hazen SL, Brown JM. Gut microbe-targeted choline trimethylamine lyase inhibition improves obesity via rewiring of host circadian rhythms. eLife 2022; 11:63998. [PMID: 35072627 PMCID: PMC8813054 DOI: 10.7554/elife.63998] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 01/20/2022] [Indexed: 11/13/2022] Open
Abstract
Obesity has repeatedly been linked to reorganization of the gut microbiome, yet to this point obesity therapeutics have been targeted exclusively toward the human host. Here, we show that gut microbe-targeted inhibition of the trimethylamine N-oxide (TMAO) pathway protects mice against the metabolic disturbances associated with diet-induced obesity (DIO) or leptin deficiency (Lepob/ob). Small molecule inhibition of the gut microbial enzyme choline TMA-lyase (CutC) does not reduce food intake but is instead associated with alterations in the gut microbiome, improvement in glucose tolerance, and enhanced energy expenditure. We also show that gut microbial CutC inhibition is associated with reorganization of host circadian control of both phosphatidylcholine and energy metabolism. This study underscores the relationship between microbe and host metabolism and provides evidence that gut microbe-derived trimethylamine (TMA) is a key regulator of the host circadian clock. This work also demonstrates that gut microbe-targeted enzyme inhibitors have potential as anti-obesity therapeutics.
Collapse
Affiliation(s)
- Rebecca C Schugar
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | | | - Lucas J Osborn
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - William Massey
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Naseer Sangwan
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Anthony Horak
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Rakhee Banerjee
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Danny Orabi
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Robert N Helsley
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Amanda L Brown
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Amy Burrows
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Chelsea Finney
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Kevin K Fung
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Frederick M Allen
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Daniel Ferguson
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Anthony D Gromovsky
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Chase Neumann
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Kendall Cook
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Amy McMillan
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Jennifer A Buffa
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - James T Anderson
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | | | - Maryam Goudarzi
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Belinda Willard
- Research Core Services, Cleveland Clinic Lerner College of Medicine
| | - Tytus D Mak
- Mass Spectromety Data Center, National Institute of Standards and Technology (NIST)
| | | | - Garth Swanson
- Department of Internal Medicine, Rush University Medical Center
| | | | | | - Zeneng Wang
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| | - Aldons J Lusis
- Department of Medicine, University of California, Los Angeles
| | - Stanley L Hazen
- Department of Cellular and Molecular Medicine, Cleveland Clinic Lerner College of Medicine
| | - Jonathan Mark Brown
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine
| |
Collapse
|
15
|
Hamad A, Ozkan MH, Uma S. Trimethylamine-N-oxide (TMAO) Selectively Disrupts Endothelium-Dependent Hyperpolarization-Type Relaxations in a Time-Dependent Manner in Rat Superior Mesenteric Artery. Biol Pharm Bull 2021; 44:1220-1229. [PMID: 34471050 DOI: 10.1248/bpb.b20-00767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The vascular action of trimethylamine-N-oxide (TMAO)-the gut microbiota-derived metabolite-in contributing cardiovascular disease is a controversial topic. A recent study has shown that acute exposure of TMAO at moderate concentrations inhibits endothelium-dependent hyperpolarization (EDH)-type relaxations selectively in rat isolated femoral arteries, but not in mesenteric arteries. Here we determined the efficacy of higher TMAO concentrations with longer exposure times on vascular reactivity in rat isolated superior mesenteric arteries. Acetylcholine-induced EDH-type relaxations were examined before and after incubation with TMAO (0.1-10 mM) at increasing exposure times (1-24 h). One- and 4-h-incubations with TMAO at 0.1-3 mM did not cause any change in EDH-type relaxations. However, when the incubation time was increased to 24 h, responses to acetylcholine were reduced in arteries incubated with 1-3 mM TMAO. In addition, at higher TMAO concentration (10 mM) the decrease in EDH relaxations could be detected both in 4-h- and 24-h-incubations. The EDH-relaxations were preserved in rings incubated with 10 mM TMAO for 24 h in the presence of SKA-31 (10 µM), the small (SKCa)- and intermediate (IKCa)-conductance calcium-activated potassium channel activator. Contractile responses to phenylephrine increased in arteries exposed to 10 mM TMAO for 24 h. Interestingly, nitric oxide (NO)-mediated relaxations remained unchanged in arteries treated for 24 h at any TMAO concentration. Our study revealed that TMAO selectively disrupted EDH-type relaxations time-dependently without interfering with NO-induced vasodilation in rat isolated mesenteric arteries. Disruption of these relaxations may help explain the causal role of elevated TMAO levels in certain vascular diseases.
Collapse
Affiliation(s)
- Abdelrahman Hamad
- Department of Pharmacology, Faculty of Pharmacy, Hacettepe University
| | | | - Serdar Uma
- Department of Pharmacology, Faculty of Pharmacy, Hacettepe University
| |
Collapse
|
16
|
Vaganova AN, Murtazina RZ, Shemyakova TS, Prjibelski AD, Katolikova NV, Gainetdinov RR. Pattern of TAAR5 Expression in the Human Brain Based on Transcriptome Datasets Analysis. Int J Mol Sci 2021; 22:ijms22168802. [PMID: 34445502 PMCID: PMC8395715 DOI: 10.3390/ijms22168802] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/11/2021] [Accepted: 08/12/2021] [Indexed: 12/13/2022] Open
Abstract
Trace amine-associated receptors (TAAR) recognize organic compounds, including primary, secondary, and tertiary amines. The TAAR5 receptor is known to be involved in the olfactory sensing of innate socially relevant odors encoded by volatile amines. However, emerging data point to the involvement of TAAR5 in brain functions, particularly in the emotional behaviors mediated by the limbic system which suggests its potential contribution to the pathogenesis of neuropsychiatric diseases. TAAR5 expression was explored in datasets available in the Gene Expression Omnibus, Allen Brain Atlas, and Human Protein Atlas databases. Transcriptomic data demonstrate ubiquitous low TAAR5 expression in the cortical and limbic brain areas, the amygdala and the hippocampus, the nucleus accumbens, the thalamus, the hypothalamus, the basal ganglia, the cerebellum, the substantia nigra, and the white matter. Altered TAAR5 expression is identified in Down syndrome, major depressive disorder, or HIV-associated encephalitis. Taken together, these data indicate that TAAR5 in humans is expressed not only in the olfactory system but also in certain brain structures, including the limbic regions receiving olfactory input and involved in critical brain functions. Thus, TAAR5 can potentially be involved in the pathogenesis of brain disorders and represents a valuable novel target for neuropsychopharmacology.
Collapse
Affiliation(s)
- Anastasia N. Vaganova
- Institute of Translational Biomedicine, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia; (A.N.V.); (R.Z.M.); (T.S.S.); (A.D.P.); (N.V.K.)
| | - Ramilya Z. Murtazina
- Institute of Translational Biomedicine, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia; (A.N.V.); (R.Z.M.); (T.S.S.); (A.D.P.); (N.V.K.)
| | - Taisiia S. Shemyakova
- Institute of Translational Biomedicine, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia; (A.N.V.); (R.Z.M.); (T.S.S.); (A.D.P.); (N.V.K.)
| | - Andrey D. Prjibelski
- Institute of Translational Biomedicine, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia; (A.N.V.); (R.Z.M.); (T.S.S.); (A.D.P.); (N.V.K.)
| | - Nataliia V. Katolikova
- Institute of Translational Biomedicine, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia; (A.N.V.); (R.Z.M.); (T.S.S.); (A.D.P.); (N.V.K.)
| | - Raul R. Gainetdinov
- Institute of Translational Biomedicine, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia; (A.N.V.); (R.Z.M.); (T.S.S.); (A.D.P.); (N.V.K.)
- St. Petersburg University Hospital, St. Petersburg State University, Universitetskaya nab. 7/9, 199034 St. Petersburg, Russia
- Correspondence:
| |
Collapse
|
17
|
Khanna A, Sellegounder D, Kumar J, Chamoli M, Vargas M, Chinta SJ, Rane A, Nelson C, Peiris TH, Brem R, Andersen J, Lithgow G, Kapahi P. Trimethylamine modulates dauer formation, neurodegeneration, and lifespan through tyra-3/daf-11 signaling in Caenorhabditis elegans. Aging Cell 2021; 20:e13351. [PMID: 33819374 PMCID: PMC8135002 DOI: 10.1111/acel.13351] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 02/10/2021] [Accepted: 03/05/2021] [Indexed: 11/27/2022] Open
Abstract
In the nematode Caenorhabditis elegans, signals derived from bacteria in the diet, the animal's major nutrient source, can modulate both behavior and healthspan. Here we describe a dual role for trimethylamine (TMA), a human gut flora metabolite, which acts as a nutrient signal and a neurotoxin. TMA and its associated metabolites are produced by the human gut microbiome and have been suggested to serve as risk biomarkers for diabetes and cardiovascular diseases. We demonstrate that the tyramine receptor TYRA-3, a conserved G protein-coupled receptor (GPCR), is required to sense TMA and mediate its responses. TMA activates guanylyl cyclase DAF-11 signaling through TYRA-3 in amphid neurons (ASK) and ciliated neurons (BAG) to mediate food-sensing behavior. Bacterial mutants deficient in TMA production enhance dauer formation, extend lifespan, and are less preferred as a food source. Increased levels of TMA lead to neural damage in models of Parkinson's disease and shorten lifespan. Our results reveal conserved signaling pathways modulated by TMA in C. elegans that are likely to be relevant for its effects in mammalian systems.
Collapse
Affiliation(s)
- Amit Khanna
- Buck Institute for Research on Aging Novato CA USA
- Dovetail Genomics LLC Scotts Valley CA USA
| | | | | | | | | | - Shankar J. Chinta
- Buck Institute for Research on Aging Novato CA USA
- Touro University California Vallejo CA USA
| | - Anand Rane
- Buck Institute for Research on Aging Novato CA USA
| | | | | | - Rachel Brem
- Buck Institute for Research on Aging Novato CA USA
| | | | | | | |
Collapse
|
18
|
Gut microbiota-derived metabolites in the regulation of host immune responses and immune-related inflammatory diseases. Cell Mol Immunol 2021; 18:866-877. [PMID: 33707689 PMCID: PMC8115644 DOI: 10.1038/s41423-021-00661-4] [Citation(s) in RCA: 179] [Impact Index Per Article: 59.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 02/18/2021] [Indexed: 02/06/2023] Open
Abstract
The gut microbiota has a critical role in the maintenance of immune homeostasis. Alterations in the intestinal microbiota and gut microbiota-derived metabolites have been recognized in many immune-related inflammatory disorders. These metabolites can be produced by gut microbiota from dietary components or by the host and can be modified by gut bacteria or synthesized de novo by gut bacteria. Gut microbiota-derived metabolites influence a plethora of immune cell responses, including T cells, B cells, dendritic cells, and macrophages. Some of these metabolites are involved in the pathogenesis of immune-related inflammatory diseases, such as inflammatory bowel diseases, diabetes, rheumatoid arthritis, and systemic lupus erythematosus. Here, we review the role of microbiota-derived metabolites in regulating the functions of different immune cells and the pathogenesis of chronic immune-related inflammatory diseases.
Collapse
|
19
|
Genetic Deletion of Trace-Amine Associated Receptor 9 (TAAR9) in Rats Leads to Decreased Blood Cholesterol Levels. Int J Mol Sci 2021; 22:ijms22062942. [PMID: 33799339 PMCID: PMC7998418 DOI: 10.3390/ijms22062942] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/05/2021] [Accepted: 03/10/2021] [Indexed: 12/13/2022] Open
Abstract
In the last two decades, interest has grown significantly in the investigation of the role of trace amines and their receptors in mammalian physiology and pathology. Trace amine-associated receptor 9 (TAAR9) is one of the least studied members of this receptor family with unidentified endogenous ligands and an unknown role in the central nervous system and periphery. In this study, we generated two new TAAR9 knockout (TAAR9-KO) rat strains by CRISPR-Cas9 technology as in vivo models to evaluate the role of TAAR9 in mammalian physiology. In these mutant rats, we performed a comparative analysis of a number of hematological and biochemical parameters in the blood. Particularly, we carried out a complete blood count, erythrocyte osmotic fragility test, and screening of a panel of basic biochemical parameters. No significant alterations in any of the hematological and most biochemical parameters were found between mutant and WT rats. However, biochemical studies revealed a significant decrease in total and low-density lipoprotein cholesterol levels in the blood of both strains of TAAR9-KO rats. Such role of TAAR9 in cholesterol regulation not only brings a new understanding of mechanisms and biological pathways of lipid exchange but also provides a new potential drug target for disorders involving cholesterol-related pathology, such as atherosclerosis.
Collapse
|
20
|
Abstract
Historically, the focus of type II diabetes mellitus (T2DM) research has been on host metabolism and hormone action. However, emerging evidence suggests that the gut microbiome, commensal microbes that colonize the gastrointestinal tract, also play a significant role in T2DM pathogenesis. Specifically, gut microbes metabolize what is available to them through the host diet to produce small molecule metabolites that can have endocrine-like effects on human cells. In fact, the meta-organismal crosstalk between gut microbe-generated metabolites and host receptor systems may represent an untapped therapeutic target for those at risk for or suffering from T2DM. Recent evidence suggests that gut microbe-derived metabolites can impact host adiposity, insulin resistance, and hormone secretion to collectively impact T2DM progression. Here we review the current evidence that structurally diverse gut microbe-derived metabolites, including short chain fatty acids, secondary bile acids, aromatic metabolites, trimethylamine-N-oxide, polyamines, and N-acyl amides, that can engage with host receptors in an endocrine-like manner to promote host metabolic disturbance associated with T2DM. Although these microbe-host signaling circuits are not as well understood as host hormonal signaling, they hold untapped potential as new druggable targets to improve T2DM complications. Whether drugs that selectively target meta-organismal endocrinology will be safe and efficacious in treating T2DM is a key new question in the field of endocrinology. Here we discuss the opportunities and challenges in targeting the gut microbial endocrine organ for the treatment of diabetes and potentially many other diseases where diet-microbe-host interactions play a contributory role.
Collapse
Affiliation(s)
- William Massey
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland Clinic, Cleveland, OH, USA
- Center for Microbiome and Human Health, Lerner Research Institute of the Cleveland Clinic, Cleveland, OH, USA
| | - J Mark Brown
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute of the Cleveland Clinic, Cleveland, OH, USA
- Center for Microbiome and Human Health, Lerner Research Institute of the Cleveland Clinic, Cleveland, OH, USA
- Correspondence: J. Mark Brown, Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Cleveland, OH 44195, USA.
| |
Collapse
|
21
|
Restini CBA, Fink GD, Watts SW. Vascular reactivity stimulated by TMA and TMAO: Are perivascular adipose tissue and endothelium involved? Pharmacol Res 2021; 163:105273. [PMID: 33197599 PMCID: PMC7855790 DOI: 10.1016/j.phrs.2020.105273] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 10/23/2020] [Accepted: 10/27/2020] [Indexed: 12/17/2022]
Abstract
Trimethylamine (TMA), formed by intestinal microbiota, and its Flavin-Monooxygenase 3 (FMO3) product Trimethylamine-N-Oxide (TMAO), are potential modulators of host cardiometabolic phenotypes. High circulating levels of TMAO are associated with increased risk for cardiovascular diseases. We hypothesized that TMA/TMAO could directly change the vascular tone. Perivascular adipose tissue (PVAT) helps to regulate vascular homeostasis and may also possess FMO3. Thoracic aorta with(+) or without(-) PVAT, also + or - the endothelium (E), of male Sprague Dawley rats were isolated for measurement of isometric tone in response to TMA/TMAO (1nM-0.5 M). Immunohistochemistry (IHC) studies were done to identify the presence of FMO3. TMA and TMAO elicited concentration-dependent arterial contraction. However, at a maximally achievable concentration (0.2 M), contraction stimulated by TMA was of a greater magnitude (141.5 ± 16% of maximum phenylephrine contraction) than that elicited by TMAO (19.1 ± 4.03%) with PVAT and endothelium intact. When PVAT was preserved, TMAO-induced contraction was extensively reduced the presence (19.1 ± 4.03%) versus absence of E (147.2 ± 20.5%), indicating that the endothelium plays a protective role against TMAO-induced contraction. FMO3 enzyme was present in aortic PVAT, but the FMO3 inhibitor methimazole did not affect contraction stimulated by TMA in aorta + PVAT. However, the l-type calcium channel blocker nifedipine reduced TMA-induced contraction by ∼50% compared to the vehicle. Though a high concentration of these compounds was needed to achieve contraction, the findings that TMA-induced contraction was independent of PVAT and E and mediated by nifedipine-sensitive calcium channels suggest metabolite-induced contraction may be physiologically important.
Collapse
Affiliation(s)
- Carolina Baraldi A Restini
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, United States; College of Osteopathic Medicine, Michigan State University, 44575 Garfield Road, Building UC4, Clinton Township, MI, 48038, United States.
| | - Gregory D Fink
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, United States
| | - Stephanie W Watts
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI 48824, United States
| |
Collapse
|
22
|
Zhukov DA, Vinogradova EP. Trace Amines and Behavior. NEUROCHEM J+ 2020. [DOI: 10.1134/s1819712420040108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
23
|
Dewan A. Olfactory signaling via trace amine-associated receptors. Cell Tissue Res 2020; 383:395-407. [PMID: 33237477 DOI: 10.1007/s00441-020-03331-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/28/2020] [Indexed: 01/30/2023]
Abstract
Trace amine-associated receptors (TAARs) are a family of G protein-coupled receptors that function as odorant receptors in the main olfactory system of vertebrates. TAARs are monoallelically expressed in primary sensory neurons where they couple to the same transduction cascade as canonical olfactory receptors and are mapped onto glomeruli within a specific region of the olfactory bulb. TAARs have a high affinity for volatile amines, a class of chemicals that are generated during the decomposition of proteins and are ubiquitous physiological metabolites that are found in body fluids. Thus, amines are proposed to play an important role in intra- and interspecific communication such as signaling the sex of the conspecific, the quality of the food source, or even the proximity of a predator. TAARs have a crucial role in the perception of these behaviorally relevant compounds as the genetic deletion of all or even individual olfactory TAARs can alter the behavioral response and reduce the sensitivity to amines. The small size of this receptor family combined with the ethological relevance of their ligands makes the TAARs an attractive model system for probing olfactory perception. This review will summarize the current knowledge on the olfactory TAARs and discuss whether they represent a unique subsystem within the main olfactory system.
Collapse
Affiliation(s)
- Adam Dewan
- Department of Psychology, Florida State University, 1107 W. Call St, Tallahassee, FL, 32306, USA.
| |
Collapse
|
24
|
Efimova EV, Kozlova AA, Razenkova V, Katolikova NV, Antonova KA, Sotnikova TD, Merkulyeva NS, Veshchitskii AS, Kalinina DS, Korzhevskii DE, Musienko PE, Kanov EV, Gainetdinov RR. Increased dopamine transmission and adult neurogenesis in trace amine-associated receptor 5 (TAAR5) knockout mice. Neuropharmacology 2020; 182:108373. [PMID: 33132188 DOI: 10.1016/j.neuropharm.2020.108373] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/22/2020] [Accepted: 10/23/2020] [Indexed: 12/24/2022]
Abstract
Trace amine-associated receptors (TAARs) are a class of sensory G protein-coupled receptors that detect biogenic amines, products of decarboxylation of amino acids. The majority of TAARs (TAAR2-TAAR9) have been described mainly in the olfactory epithelium and considered to be olfactory receptors sensing innate odors. However, there is recent evidence that one of the members of this family, TAAR5, is expressed also in the limbic brain areas receiving projection from the olfactory system and involved in the regulation of emotions. In this study, we further characterized a mouse line lacking TAAR5 (TAAR5 knockout, TAAR5-KO mice) that express beta-galactosidase mapping TAAR5 expression. We found that in TAAR5-KO mice the number of dopamine neurons, the striatal levels of dopamine and its metabolites, as well as striatal levels of GDNF mRNA, are elevated indicating a potential increase in dopamine neuron proliferation. Furthermore, an analysis of TAAR5 beta-galactosidase expression revealed that TAAR5 is present in the major neurogenic areas of the brain such as the subventricular zone (SVZ), the subgranular zone (SGZ) and the less characterized potentially neurogenic zone surrounding the 3rd ventricle. Direct analysis of neurogenesis by using specific markers doublecortin (DCX) and proliferating cell nuclear antigen (PCNA) revealed at least 2-fold increase in the number of proliferating neurons in the SVZ and SGZ of TAAR5-KO mice, but no such markers were detected in mutant or control mice in the areas surrounding the 3rd ventricle. These observations indicate that TAAR5 involved not only in regulation of emotional status but also adult neurogenesis and dopamine transmission. Thus, future TAAR5 antagonists may exert not only antidepressant and/or anxiolytic action but may also provide new treatment opportunity for neurodegenerative disorders such as Parkinson's disease.
Collapse
Affiliation(s)
- Evgeniya V Efimova
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia
| | - Alena A Kozlova
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia
| | | | - Nataliia V Katolikova
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia
| | - Kristina A Antonova
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia
| | - Tatyana D Sotnikova
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia
| | - Natalia S Merkulyeva
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia; Pavlov Institute of Physiology RAS, St. Petersburg, Russia
| | | | - Daria S Kalinina
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia
| | | | - Pavel E Musienko
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia; St. Petersburg State Research Institute of Phthisiopulmonology, Ministry of Healthcare of the RF, St. Petersburg, 191036, Russia
| | - Evgeny V Kanov
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia
| | - Raul R Gainetdinov
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, 199034, Russia; St. Petersburg University Hospital, St. Petersburg State University, St. Petersburg, 199034, Russia.
| |
Collapse
|
25
|
Gisladottir RS, Ivarsdottir EV, Helgason A, Jonsson L, Hannesdottir NK, Rutsdottir G, Arnadottir GA, Skuladottir A, Jonsson BA, Norddahl GL, Ulfarsson MO, Helgason H, Halldorsson BV, Nawaz MS, Tragante V, Sveinbjornsson G, Thorgeirsson T, Oddsson A, Kristjansson RP, Bjornsdottir G, Thorgeirsson G, Jonsdottir I, Holm H, Gudbjartsson DF, Thorsteinsdottir U, Stefansson H, Sulem P, Stefansson K. Sequence Variants in TAAR5 and Other Loci Affect Human Odor Perception and Naming. Curr Biol 2020; 30:4643-4653.e3. [PMID: 33035477 DOI: 10.1016/j.cub.2020.09.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 04/17/2020] [Accepted: 09/03/2020] [Indexed: 11/17/2022]
Abstract
Olfactory receptor (OR) genes in humans form a special class characterized by unusually high DNA sequence diversity, which should give rise to differences in perception and behavior. In the largest genome-wide association study to date based on olfactory testing, we investigated odor perception and naming with smell tasks performed by 9,122 Icelanders, with replication in a separate sample of 2,204 individuals. We discovered an association between a low-frequency missense variant in TAAR5 and reduced intensity rating of fish odor containing trimethylamine (p.Ser95Pro, pcombined = 5.6 × 10-15). We demonstrate that TAAR5 genotype affects aversion to fish odor, reflected by linguistic descriptions of the odor and pleasantness ratings. We also discovered common sequence variants in two canonical olfactory receptor loci that associate with increased intensity and naming of licorice odor (trans-anethole: lead variant p.Lys233Asn in OR6C70, pcombined = 8.8 × 10-16 and pcombined = 1.4 × 10-9) and enhanced naming of cinnamon (trans-cinnamaldehyde; intergenic variant rs317787-T, pcombined = 5.0 × 10-17). Together, our results show that TAAR5 genotype variation influences human odor responses and highlight that sequence diversity in canonical OR genes can lead to enhanced olfactory ability, in contrast to the view that greater tolerance for mutations in the human OR repertoire leads to diminished function.
Collapse
Affiliation(s)
- Rosa S Gisladottir
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; School of Humanities, University of Iceland, Saemundargata 2, 102 Reykjavik, Iceland.
| | - Erna V Ivarsdottir
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; School of Engineering and Natural Sciences, University of Iceland, Dunhagi 5, 107 Reykjavik, Iceland
| | - Agnar Helgason
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; Department of Anthropology, University of Iceland, Saemundargata 10, 102 Reykjavik, Iceland
| | - Lina Jonsson
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; Department of Pharmacology, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Medicinaregatan 13, SE-405 30, Gothenburg, Sweden; The Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Blå Stråket 15, 413 45, Gothenburg, Sweden
| | | | | | | | | | | | | | - Magnus O Ulfarsson
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; Faculty of Electrical and Computer Engineering, University of Iceland, Dunhagi 5, 107 Reykjavik, Iceland
| | - Hannes Helgason
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland
| | - Bjarni V Halldorsson
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; School of Technology, Reykjavik University, Menntavegur 1, 101 Reykjavik, Iceland
| | - Muhammad S Nawaz
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland
| | | | | | | | - Asmundur Oddsson
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland
| | | | | | - Gudmundur Thorgeirsson
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101 Reykjavik, Iceland; Division of Cardiology, Department of Internal Medicine, Landspitali, The National University Hospital of Iceland, Hringbraut, 101 Reykjavik, Iceland
| | - Ingileif Jonsdottir
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101 Reykjavik, Iceland; Department of Immunology, Landspitali, The National University Hospital of Iceland, Hringbraut, 101 Reykjavik, Iceland
| | - Hilma Holm
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland
| | - Daniel F Gudbjartsson
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; School of Engineering and Natural Sciences, University of Iceland, Dunhagi 5, 107 Reykjavik, Iceland
| | - Unnur Thorsteinsdottir
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101 Reykjavik, Iceland
| | | | - Patrick Sulem
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland
| | - Kari Stefansson
- deCODE Genetics/Amgen Inc., Sturlugata 8, 101 Reykjavik, Iceland; Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101 Reykjavik, Iceland.
| |
Collapse
|
26
|
Pretorius L, Smith C. The trace aminergic system: a gender-sensitive therapeutic target for IBS? J Biomed Sci 2020; 27:95. [PMID: 32981524 PMCID: PMC7520957 DOI: 10.1186/s12929-020-00688-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/15/2020] [Indexed: 02/06/2023] Open
Abstract
Due to a lack of specific or sensitive biomarkers, drug discovery advances have been limited for individuals suffering from irritable bowel syndrome (IBS). While current therapies provide symptomatic relief, inflammation itself is relatively neglected, despite the presence of chronic immune activation and innate immune system dysfunction. Moreover, considering the microgenderome concept, gender is a significant aetiological risk factor. We believe that we have pinpointed a "missing link" that connects gender, dysbiosis, diet, and inflammation in the context of IBS, which may be manipulated as therapeutic target. The trace aminergic system is conveniently positioned at the interface of the gut microbiome, dietary nutrients and by-products, and mucosal immunity. Almost all leukocyte populations express trace amine associated receptors and significant amounts of trace amines originate from both food and the gut microbiota. Additionally, although IBS-specific data are sparse, existing data supports an interpretation in favour of a gender dependence in trace aminergic signalling. As such, trace aminergic signalling may be altered by fluctuations of especially female reproductive hormones. Utilizing a multidisciplinary approach, this review discusses potential mechanisms of actions, which include hyperreactivity of the immune system and aberrant serotonin signalling, and links outcomes to the symptomology clinically prevalent in IBS. Taken together, it is feasible that the additional level of regulation by the trace aminergic system in IBS has been overlooked, until now. As such, we suggest that components of the trace aminergic system be considered targets for future therapeutic action, with the specific focus of reducing oxidative stress and inflammation.
Collapse
Affiliation(s)
- Lesha Pretorius
- Department of Physiological Sciences, Stellenbosch University, Stellenbosch Private Bag X1, Stellenbosch, 7062, South Africa
| | - Carine Smith
- Department of Physiological Sciences, Stellenbosch University, Stellenbosch Private Bag X1, Stellenbosch, 7062, South Africa.
| |
Collapse
|
27
|
Han P, Weber C, Hummel T. Brain response to intranasal trimethylamine stimulation: A preliminary human fMRI study. Neurosci Lett 2020; 735:135166. [PMID: 32574795 DOI: 10.1016/j.neulet.2020.135166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/04/2020] [Accepted: 06/15/2020] [Indexed: 11/29/2022]
Abstract
The trace amine-associated receptors (TAARs) are a second class of olfactory receptors in humans. They are activated by volatile amines, including pheromone-like odors. However, in humans the neural processing of TAAR-associated signals is not known. Using functional magnetic resonance imaging, the current study investigated brain activation following intra-nasal stimulation with trimethylamine (TMA), an agonist of human TAAR5, and three "canonical" odors with varied valence (an unpleasant odor [n-butanol], a neutral to unpleasant odor [civet musk], and a pleasant odor [phenyl ethyl alcohol]) in 12 healthy young participants. Our hypothesis driven analysis showed that TMA induced a trend for stronger left amygdala activation as compared to the other odors (Family-Wise Error corrected p = 0.08). Whole-brain exploratory analyses revealed superior activation of the cerebellum and caudate to TMA compared to canonical odors, and stronger activation of the anterior cingulate and somatosensory regions (postcentral gyrus and mid cingulate) in response to canonical odors compared to TMA. The current results provide initial evidence on differential central processes of a TAAR mediated stimulus compared to odors targeting canonical olfactory receptors. Future research are needed to elucidate the physiological and psychological relevance of TAARs in humans.
Collapse
Affiliation(s)
- Pengfei Han
- Interdisciplinary Center on Smell and Taste, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany; Faculty of Psychology, Southwest University, Chongqing, China; The Key Laboratory of Cognition and Personality, Ministry of Education, Chongqing, China.
| | - Catharina Weber
- Interdisciplinary Center on Smell and Taste, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| | - Thomas Hummel
- Interdisciplinary Center on Smell and Taste, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| |
Collapse
|
28
|
Abstract
Fecal microbial community changes are associated with numerous disease states, including cardiovascular disease (CVD). However, such data are merely associative. A causal contribution for gut microbiota in CVD has been further supported by a multitude of more direct experimental evidence. Indeed, gut microbiota transplantation studies, specific gut microbiota-dependent pathways, and downstream metabolites have all been shown to influence host metabolism and CVD, sometimes through specific identified host receptors. Multiple metaorganismal pathways (involving both microbe and host) both impact CVD in animal models and show striking clinical associations in human studies. For example, trimethylamine N-oxide and, more recently, phenylacetylglutamine are gut microbiota-dependent metabolites whose blood levels are associated with incident CVD risks in large-scale clinical studies. Importantly, a causal link to CVD for these and other specific gut microbial metabolites/pathways has been shown through numerous mechanistic animal model studies. Phenylacetylglutamine, for example, was recently shown to promote adverse cardiovascular phenotypes in the host via interaction with multiple ARs (adrenergic receptors)-a class of key receptors that regulate cardiovascular homeostasis. In this review, we summarize recent advances of microbiome research in CVD and related cardiometabolic phenotypes that have helped to move the field forward from associative to causative results. We focus on microbiota and metaorganismal compounds/pathways, with specific attention paid to short-chain fatty acids, secondary bile acids, trimethylamine N-oxide, and phenylacetylglutamine. We also discuss novel therapeutic strategies for directly targeting the gut microbiome to improve cardiovascular outcomes.
Collapse
Affiliation(s)
- Marco Witkowski
- From the Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute (M.W., T.L.W., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome and Human Health (M.W., S.L.H.), Cleveland Clinic, OH
| | - Taylor L Weeks
- From the Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute (M.W., T.L.W., S.L.H.), Cleveland Clinic, OH.,Department of Cardiovascular Medicine, Heart and Vascular Institute (S.L.H.), Cleveland Clinic, OH
| | - Stanley L Hazen
- From the Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute (M.W., T.L.W., S.L.H.), Cleveland Clinic, OH.,Center for Microbiome and Human Health (M.W., S.L.H.), Cleveland Clinic, OH
| |
Collapse
|
29
|
Abstract
Trace amine-associated receptors (TAARs) are a family of G protein-coupled receptors (GPCRs) that are evolutionarily conserved in vertebrates. The first discovered TAAR1 is mainly expressed in the brain, and is able to detect low abundant trace amines. TAAR1 is also activated by several synthetic compounds and psychostimulant drugs like amphetamine. Activation of TAAR1 by specific agonists can regulate the classical monoaminergic systems in the brain. Further studies have revealed that other TAAR family members are highly expressed in the olfactory system which are termed olfactory TAARs. In vertebrates, olfactory TAARs can specifically recognize volatile or water-soluble amines. Some of these TAAR agonists are produced by decarboxylation of amino acids. In addition, some TAAR agonists are ethological odors that mediate animal innate behaviors. In this study, we provide a comprehensive review of TAAR agonists, including their structures, biosynthesis pathways, and functions.
Collapse
Affiliation(s)
- Zhengrong Xu
- Collaborative Innovation Center for Brain Science, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
- Department of Otolaryngology Head and Neck Surgery, Jiangsu Provincial Key Medical Discipline (Laboratory), Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008, China
- Research Institute of Otolaryngology, Nanjing, 210008, China
| | - Qian Li
- Collaborative Innovation Center for Brain Science, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
- Shanghai Research Center for Brain Science and Brain-Inspired Intelligence, Shanghai, 201210, China.
| |
Collapse
|
30
|
Abstract
Flavin-containing monooxygenases (FMOs) catalyze the oxygenation of numerous foreign chemicals. This review considers the roles of FMOs in the metabolism of endogenous substrates and in physiological processes, and focuses on FMOs of human and mouse. Tyramine, phenethylamine, trimethylamine, cysteamine, methionine, lipoic acid and lipoamide have been identified as endogenous or dietary-derived substrates of FMOs in vitro. However, with the exception of trimethylamine, the role of FMOs in the metabolism of these compounds in vivo is unclear. The use, as experimental models, of knockout-mouse lines deficient in various Fmo genes has revealed previously unsuspected roles for FMOs in endogenous metabolic processes. FMO1 has been identified as a novel regulator of energy balance that acts to promote metabolic efficiency, and also as being involved in the biosynthesis of taurine, by catalyzing the S-oxygenation of hypotaurine. FMO5 has been identified as a regulator of metabolic ageing and glucose homeostasis that apparently acts by sensing or responding to gut bacteria. Thus, FMOs do not function only as xenobiotic-metabolizing enzymes and there is a risk that exposure to drugs and environmental chemicals that are substrates or inducers of FMOs would perturb the endogenous functions of these enzymes.
Collapse
|
31
|
Cherry JA, Baum MJ. Sex differences in main olfactory system pathways involved in psychosexual function. GENES BRAIN AND BEHAVIOR 2019; 19:e12618. [PMID: 31634411 DOI: 10.1111/gbb.12618] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/08/2019] [Accepted: 10/14/2019] [Indexed: 01/21/2023]
Abstract
We summarize literature from animal and human studies assessing sex differences in the ability of the main olfactory system to detect and process sex-specific olfactory signals ("pheromones") that control the expression of psychosexual functions in males and females. A case is made in non primate mammals for an obligatory role of pheromonal signaling via the main olfactory system (in addition to the vomeronasal-accessory olfactory system) in mate recognition and sexual arousal, with male-specific as well as female-specific pheromones subserving these functions in the opposite sex. Although the case for an obligatory role of pheromones in mate recognition and mating among old world primates, including humans, is weaker, we review the current literature assessing the role of putative human pheromones (eg, AND, EST, "copulin"), detected by the main olfactory system, in promoting mate choice and mating in men and women. Based on animal studies, we hypothesize that sexually dimorphic effects of putative human pheromones are mediated via main olfactory inputs to the medial amygdala which, in turn, transmits olfactory information to sites in the hypothalamus that regulate reproduction.
Collapse
Affiliation(s)
- James A Cherry
- Department of Psychological and Brain Sciences, Boston University, Boston, Massachusetts
| | - Michael J Baum
- Department of Biology, Boston University, Boston, Massachusetts
| |
Collapse
|
32
|
Belov DR, Efimova EV, Fesenko ZS, Antonova KA, Kolodyazhny SF, Lakstygal AM, Gainetdinov RR. Putative Trace-Amine Associated Receptor 5 (TAAR5) Agonist α-NETA Increases Electrocorticogram Gamma-Rhythm in Freely Moving Rats. Cell Mol Neurobiol 2019; 40:203-213. [DOI: 10.1007/s10571-019-00716-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 07/30/2019] [Indexed: 11/28/2022]
|
33
|
Aleksandrov AA, Polyakova NV, Vinogradova EP, Gainetdinov RR, Knyazeva VM. The TAAR5 agonist α-NETA causes dyskinesia in mice. Neurosci Lett 2019; 704:208-211. [PMID: 30986441 DOI: 10.1016/j.neulet.2019.04.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 04/02/2019] [Accepted: 04/09/2019] [Indexed: 11/28/2022]
Abstract
It is known that trace amine-associated receptor 5 (TAAR5) is expressed in various regions of the central nervous system. However, very limited information is available on the behavioral effects of TAAR5 activation and the TAAR5 functional role, in general. We studied the effect of TAAR5 agonist (2-(alpha-naphthoyl) ethyltrimethylammonium iodide) systemic administration on animal behavior. The study was performed on male C57BL/6 mice. It was observed that α-NETA in 10 mg/kg dose caused specific impairment of motor behavior, similar to the manifestations of tardive dyskinesia in humans. It can be assumed that trace amines and TAAR5 may be involved in the human tardive dyskinesia pathogenesis.
Collapse
Affiliation(s)
- Aleksander A Aleksandrov
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, 7/9 Universitetskaya Emb., 199034, St Petersburg, Russia
| | - Nadezhda V Polyakova
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, 7/9 Universitetskaya Emb., 199034, St Petersburg, Russia
| | - Ekaterina P Vinogradova
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, 7/9 Universitetskaya Emb., 199034, St Petersburg, Russia
| | - Raul R Gainetdinov
- Institute of Translational Biomedicine and Saint Petersburg University Hospital, Saint Petersburg State University, 7/9 Universitetskaya Emb., 199034, St Petersburg, Russia
| | - Veronika M Knyazeva
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, 7/9 Universitetskaya Emb., 199034, St Petersburg, Russia.
| |
Collapse
|
34
|
Abstract
Olfaction is the primary sense used by most animals to perceive the external world. The mouse olfactory system is composed of several sensory structures, the largest of which is the main olfactory epithelium (MOE). Olfactory sensory neurons (OSNs) located within the MOE detect odors and pheromones using dedicated seven-transmembrane G protein-coupled receptors (GPCRs). Two families of GPCRs are expressed in the MOE and are conserved in humans and other vertebrates: odorant receptors (ORs) and trace amine-associated receptors (TAARs). TAARs are distantly related to biogenic amine receptors, such as dopamine and serotonin receptors. Several TAARs detect volatile amines including ethological odors that evoke innate animal behavioral responses. Mouse TAAR4 recognizes the aversive predator odor 2-phenylethylamine, while mouse TAAR5 detects the attractive male mouse odor trimethylamine. In zebrafish, TAAR13c detects the foul death-associated odor cadaverine that mediates innate avoidance behavior. TAARs thus provide an excellent model subsystem to study odor valence. And identification of additional high-affinity ligands for TAARs will provide extra tools for such study. Therefore, this chapter focuses on the so-called SEAP assay that has been successfully applied for TAAR deorphanization in different species.
Collapse
Affiliation(s)
- Qian Li
- Neuroscience Division, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| |
Collapse
|
35
|
Di Pizio A, Behrens M, Krautwurst D. Beyond the Flavour: The Potential Druggability of Chemosensory G Protein-Coupled Receptors. Int J Mol Sci 2019; 20:E1402. [PMID: 30897734 PMCID: PMC6471708 DOI: 10.3390/ijms20061402] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/08/2019] [Accepted: 03/12/2019] [Indexed: 12/21/2022] Open
Abstract
G protein-coupled receptors (GPCRs) belong to the largest class of drug targets. Approximately half of the members of the human GPCR superfamily are chemosensory receptors, including odorant receptors (ORs), trace amine-associated receptors (TAARs), bitter taste receptors (TAS2Rs), sweet and umami taste receptors (TAS1Rs). Interestingly, these chemosensory GPCRs (csGPCRs) are expressed in several tissues of the body where they are supposed to play a role in biological functions other than chemosensation. Despite their abundance and physiological/pathological relevance, the druggability of csGPCRs has been suggested but not fully characterized. Here, we aim to explore the potential of targeting csGPCRs to treat diseases by reviewing the current knowledge of csGPCRs expressed throughout the body and by analysing the chemical space and the drug-likeness of flavour molecules.
Collapse
Affiliation(s)
- Antonella Di Pizio
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Freising, 85354, Germany.
| | - Maik Behrens
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Freising, 85354, Germany.
| | - Dietmar Krautwurst
- Leibniz-Institute for Food Systems Biology at the Technical University of Munich, Freising, 85354, Germany.
| |
Collapse
|
36
|
Sharma A, Kumar R, Aier I, Semwal R, Tyagi P, Varadwaj P. Sense of Smell: Structural, Functional, Mechanistic Advancements and Challenges in Human Olfactory Research. Curr Neuropharmacol 2019; 17:891-911. [PMID: 30520376 PMCID: PMC7052838 DOI: 10.2174/1570159x17666181206095626] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 11/08/2018] [Accepted: 11/28/2018] [Indexed: 02/07/2023] Open
Abstract
Olfaction, the sense of smell detects and discriminate odors as well as social cues which influence our innate responses. The olfactory system in human beings is found to be weak as compared to other animals; however, it seems to be very precise. It can detect and discriminate millions of chemical moieties (odorants) even in minuscule quantities. The process initiates with the binding of odorants to specialized olfactory receptors, encoded by a large family of Olfactory Receptor (OR) genes belonging to the G-protein-coupled receptor superfamily. Stimulation of ORs converts the chemical information encoded in the odorants, into respective neuronal action-potentials which causes depolarization of olfactory sensory neurons. The olfactory bulb relays this signal to different parts of the brain for processing. Odors are encrypted using a combinatorial approach to detect a variety of chemicals and encode their unique identity. The discovery of functional OR genes and proteins provided an important information to decipher the genomic, structural and functional basis of olfaction. ORs constitute 17 gene families, out of which 4 families were reported to contain more than hundred members each. The olfactory machinery is not limited to GPCRs; a number of non- GPCRs is also employed to detect chemosensory stimuli. The article provides detailed information about such olfaction machinery, structures, transduction mechanism, theories of odor perception, and challenges in the olfaction research. It covers the structural, functional and computational studies carried out in the olfaction research in the recent past.
Collapse
Affiliation(s)
| | | | | | | | | | - Pritish Varadwaj
- Address correspondence to this author at the Department of Applied Science, Indian Institute of Information Technology, Allahabad, Uttar Pradesh, India; E-mail:
| |
Collapse
|
37
|
Maßberg D, Hatt H. Human Olfactory Receptors: Novel Cellular Functions Outside of the Nose. Physiol Rev 2018; 98:1739-1763. [PMID: 29897292 DOI: 10.1152/physrev.00013.2017] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Olfactory receptors (ORs) are not exclusively expressed in the olfactory sensory neurons; they are also observed outside of the olfactory system in all other human tissues tested to date, including the testis, lung, intestine, skin, heart, and blood. Within these tissues, certain ORs have been determined to be exclusively expressed in only one tissue, whereas other ORs are more widely distributed in many different tissues throughout the human body. For most of the ectopically expressed ORs, limited data are available for their functional roles. They have been shown to be involved in the modulation of cell-cell recognition, migration, proliferation, the apoptotic cycle, exocytosis, and pathfinding processes. Additionally, there is a growing body of evidence that they have the potential to serve as diagnostic and therapeutic tools, as ORs are highly expressed in different cancer tissues. Interestingly, in addition to the canonical signaling pathways activated by ORs in olfactory sensory neurons, alternative pathways have been demonstrated in nonolfactory tissues. In this review, the existing data concerning the expression, as well as the physiological and pathophysiological functions, of ORs outside of the nose are highlighted to provide insights into future lines of research.
Collapse
Affiliation(s)
- Désirée Maßberg
- Ruhr-University Bochum, Department of Cell Physiology , Bochum , Germany
| | - Hanns Hatt
- Ruhr-University Bochum, Department of Cell Physiology , Bochum , Germany
| |
Collapse
|
38
|
Abstract
Trace amines are endogenous compounds classically regarded as comprising β-phenylethyalmine, p-tyramine, tryptamine, p-octopamine, and some of their metabolites. They are also abundant in common foodstuffs and can be produced and degraded by the constitutive microbiota. The ability to use trace amines has arisen at least twice during evolution, with distinct receptor families present in invertebrates and vertebrates. The term "trace amine" was coined to reflect the low tissue levels in mammals; however, invertebrates have relatively high levels where they function like mammalian adrenergic systems, involved in "fight-or-flight" responses. Vertebrates express a family of receptors termed trace amine-associated receptors (TAARs). Humans possess six functional isoforms (TAAR1, TAAR2, TAAR5, TAAR6, TAAR8, and TAAR9), whereas some fish species express over 100. With the exception of TAAR1, TAARs are expressed in olfactory epithelium neurons, where they detect diverse ethological signals including predators, spoiled food, migratory cues, and pheromones. Outside the olfactory system, TAAR1 is the most thoroughly studied and has both central and peripheral roles. In the brain, TAAR1 acts as a rheostat of dopaminergic, glutamatergic, and serotonergic neurotransmission and has been identified as a novel therapeutic target for schizophrenia, depression, and addiction. In the periphery, TAAR1 regulates nutrient-induced hormone secretion, suggesting its potential as a novel therapeutic target for diabetes and obesity. TAAR1 may also regulate immune responses by regulating leukocyte differentiation and activation. This article provides a comprehensive review of the current state of knowledge of the evolution, physiologic functions, pharmacology, molecular mechanisms, and therapeutic potential of trace amines and their receptors in vertebrates and invertebrates.
Collapse
Affiliation(s)
- Raul R Gainetdinov
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia (R.R.G.); Skolkovo Institute of Science and Technology (Skoltech), Moscow, Russia (R.R.G.); Neuroscience, Ophthalmology, and Rare Diseases Discovery and Translational Area, pRED, Roche Innovation Centre Basel, F. Hoffmann-La Roche Ltd., Basel, Switzerland (M.C.H.); and Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada (M.D.B.)
| | - Marius C Hoener
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia (R.R.G.); Skolkovo Institute of Science and Technology (Skoltech), Moscow, Russia (R.R.G.); Neuroscience, Ophthalmology, and Rare Diseases Discovery and Translational Area, pRED, Roche Innovation Centre Basel, F. Hoffmann-La Roche Ltd., Basel, Switzerland (M.C.H.); and Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada (M.D.B.)
| | - Mark D Berry
- Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia (R.R.G.); Skolkovo Institute of Science and Technology (Skoltech), Moscow, Russia (R.R.G.); Neuroscience, Ophthalmology, and Rare Diseases Discovery and Translational Area, pRED, Roche Innovation Centre Basel, F. Hoffmann-La Roche Ltd., Basel, Switzerland (M.C.H.); and Department of Biochemistry, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada (M.D.B.)
| |
Collapse
|
39
|
Brial F, Le Lay A, Dumas ME, Gauguier D. Implication of gut microbiota metabolites in cardiovascular and metabolic diseases. Cell Mol Life Sci 2018; 75:3977-3990. [PMID: 30101405 PMCID: PMC6182343 DOI: 10.1007/s00018-018-2901-1] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 07/31/2018] [Accepted: 08/08/2018] [Indexed: 12/18/2022]
Abstract
Evidence from the literature keeps highlighting the impact of mutualistic bacterial communities of the gut microbiota on human health. The gut microbita is a complex ecosystem of symbiotic bacteria which contributes to mammalian host biology by processing, otherwise, indigestible nutrients, supplying essential metabolites, and contributing to modulate its immune system. Advances in sequencing technologies have enabled structural analysis of the human gut microbiota and allowed detection of changes in gut bacterial composition in several common diseases, including cardiometabolic disorders. Biological signals sent by the gut microbiota to the host, including microbial metabolites and pro-inflammatory molecules, mediate microbiome-host genome cross-talk. This rapidly expanding line of research can identify disease-causing and disease-predictive microbial metabolite biomarkers, which can be translated into novel biodiagnostic tests, dietary supplements, and nutritional interventions for personalized therapeutic developments in common diseases. Here, we review results from the most significant studies dealing with the association of products from the gut microbial metabolism with cardiometabolic disorders. We underline the importance of these postbiotic biomarkers in the diagnosis and treatment of human disorders.
Collapse
Affiliation(s)
- Francois Brial
- Sorbonne University, University Paris Descartes, INSERM UMR_S1138, Cordeliers Research Centre, 15 rue de l'Ecole de Médecine, 75006, Paris, France
| | - Aurélie Le Lay
- Sorbonne University, University Paris Descartes, INSERM UMR_S1138, Cordeliers Research Centre, 15 rue de l'Ecole de Médecine, 75006, Paris, France
| | - Marc-Emmanuel Dumas
- Section of Biomolecular Medicine, Division of Computational and Systems Medicine, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Sir Alexander Fleming Building, London, UK
- McGill University and Genome Quebec Innovation Centre, 740 Doctor Penfield Avenue, Montreal, QC, H3A 0G1, Canada
| | - Dominique Gauguier
- Sorbonne University, University Paris Descartes, INSERM UMR_S1138, Cordeliers Research Centre, 15 rue de l'Ecole de Médecine, 75006, Paris, France.
- Section of Biomolecular Medicine, Division of Computational and Systems Medicine, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Sir Alexander Fleming Building, London, UK.
- McGill University and Genome Quebec Innovation Centre, 740 Doctor Penfield Avenue, Montreal, QC, H3A 0G1, Canada.
| |
Collapse
|
40
|
Christian SL, Berry MD. Trace Amine-Associated Receptors as Novel Therapeutic Targets for Immunomodulatory Disorders. Front Pharmacol 2018; 9:680. [PMID: 30013475 PMCID: PMC6036138 DOI: 10.3389/fphar.2018.00680] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 06/05/2018] [Indexed: 12/14/2022] Open
Abstract
Trace amines and their receptors (trace amine-associated receptors; TAARs) are an emerging pharmacological target for the treatment of human disorders. While most studies have focused on their therapeutic potential for neurologic and psychiatric disorders, TAARs are also expressed throughout the periphery, including prominent expression in human leukocytes. Furthermore, recent independent, unbiased metabolomic studies have consistently identified one or more TAAR ligands as potential etiologic factors in inflammatory bowel disease (IBD). The putative role of TAARs in diseases such as IBD that are associated with hyperactive immune responses has not, however, previously been systematically addressed. Here, we review the current state of the knowledge of the effects of TAARs on leukocyte function, in particular in the context of mucosal epithelial cells that interface with the environment; developing a model whereby TAARs may be considered as a novel therapeutic target for disorders associated with dysregulated immune responses to environmental factors. In this model, we hypothesize that altered trace amine homeostasis results in hyperactivity of the immune system. Such loss of homeostasis can occur through many different mechanisms including TAAR polymorphisms and altered trace amine load due to changes in host synthesis and/or degradative enzymes, diet, or microbial dysbiosis. The resulting alterations in TAAR functioning can then lead to a loss of homeostasis of leukocyte chemotaxis, differentiation, and activation, as well as an altered ability of members of the microbiota to adhere to and penetrate the epithelial cell layers. Such changes would generate a pro-inflammatory state at mucosal epithelial barrier layers that can manifest as clinical symptomatology such as that seen in IBD. These alterations may also have the potential to induce systemic effects, which could possibly contribute to immunomodulatory disorders in other systems, including neurological diseases.
Collapse
|
41
|
Identification of TAAR5 Agonist Activity of Alpha-NETA and Its Effect on Mismatch Negativity Amplitude in Awake Rats. Neurotox Res 2018; 34:442-451. [DOI: 10.1007/s12640-018-9902-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/06/2018] [Accepted: 04/09/2018] [Indexed: 12/20/2022]
|
42
|
Abstract
Although diet has long been known to contribute to the pathogenesis of cardiovascular disease (CVD), research over the past decade has revealed an unexpected interplay between nutrient intake, gut microbial metabolism and the host to modify the risk of developing CVD. Microbial-associated molecular patterns are sensed by host pattern recognition receptors and have been suggested to drive CVD pathogenesis. In addition, the host microbiota produces various metabolites, such as trimethylamine-N-oxide, short-chain fatty acids and secondary bile acids, that affect CVD pathogenesis. These recent advances support the notion that targeting the interactions between the host and microorganisms may hold promise for the prevention or treatment of CVD. In this Review, we summarize our current knowledge of the gut microbial mechanisms that drive CVD, with special emphasis on therapeutic interventions, and we highlight the need to establish causal links between microbial pathways and CVD pathogenesis.
Collapse
Affiliation(s)
- J Mark Brown
- Department of Cellular and Molecular Medicine, Cleveland Clinic Lerner Research Institute, 9500 Euclid Avenue, NC-10, Cleveland, Ohio 44195, USA
| | - Stanley L Hazen
- Department of Cellular and Molecular Medicine, Cleveland Clinic Lerner Research Institute, 9500 Euclid Avenue, NC-10, Cleveland, Ohio 44195, USA
| |
Collapse
|
43
|
Schugar RC, Willard B, Wang Z, Brown JM. Postprandial gut microbiota-driven choline metabolism links dietary cues to adipose tissue dysfunction. Adipocyte 2018; 7:49-56. [PMID: 29172946 DOI: 10.1080/21623945.2017.1398295] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The human body is an integrated circuit between microbial symbionts and our Homo sapien genome, which communicate bi-directionally to maintain homeostasis within the human meta-organism. There is now strong evidence that microbes resident in the human intestine can directly contribute to the pathogenesis of obesity and associated cardiometabolic disorders. In fact, gut microbes represent a filter of our greatest environmental exposure - the foods we consume. It is now clear that we each experience a given meal differently, based on our unique gut microbial communities. Biologically active gut microbe-derived metabolites, such as short chain fatty acids, secondary bile acids, and trimethylamine-N-oxide (TMAO), are now uniquely recognized as contributors to obesity and related cardiometabolic disorders. However, mechanistic insights into how microbe-derived metabolites promote obesity are largely unknown. Recent work has demonstrated that the meta-organismal production of the bacterial co-metabolite TMAO is linked to suppression of beiging of white adipose tissue in mice and humans. Furthermore, the TMAO pathway is becoming an increasingly attractive therapeutic target in obesity-associated diseases such as type 2 diabetes, kidney failure, and cardiovascular disease. In this commentary we discuss recent findings linking the TMAO pathway to obesity-associated disorders, and provide additional insights into potential mechanisms driving this microbe-host interaction.
Collapse
Affiliation(s)
- Rebecca C. Schugar
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH, USA
- Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, OH, USA
| | - Belinda Willard
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH, USA
- Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, OH, USA
| | - Zeneng Wang
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH, USA
- Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, OH, USA
| | - J. Mark Brown
- Department of Cellular and Molecular Medicine, Cleveland Clinic, Cleveland, OH, USA
- Center for Microbiome & Human Health, Cleveland Clinic, Cleveland, OH, USA
| |
Collapse
|
44
|
Geng J, Yang C, Wang B, Zhang X, Hu T, Gu Y, Li J. Trimethylamine N-oxide promotes atherosclerosis via CD36-dependent MAPK/JNK pathway. Biomed Pharmacother 2018; 97:941-947. [DOI: 10.1016/j.biopha.2017.11.016] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 10/31/2017] [Accepted: 11/03/2017] [Indexed: 02/08/2023] Open
|
45
|
Berry MD, Gainetdinov RR, Hoener MC, Shahid M. Pharmacology of human trace amine-associated receptors: Therapeutic opportunities and challenges. Pharmacol Ther 2017; 180:161-180. [DOI: 10.1016/j.pharmthera.2017.07.002] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
46
|
Targeting species-specific trace amine-associated receptor 1 ligands: to date perspective of the rational drug design process. Future Med Chem 2017; 9:1507-1527. [DOI: 10.4155/fmc-2017-0044] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
G-protein-coupled receptors represent main targets of several clinically relevant drugs, playing nowadays a leading part for further drug discovery process. Trace amine-associated receptor's family (TAARs) assumed an intriguing role as druggable target in medicinal chemistry, being TAAR1 the most investigated. Indeed, related ligands proved to be intertwined in several circuits involved in pathological pathways or therapeutic routes. Herein, we highlight relevant efforts in the search of novel agonists, focusing on responsiveness featured by different chemotypes toward rodent and human TAAR1, in order to explore species-specificity preferences. We also discuss the main strategies guiding so far the design of new TAAR1 agonists, giving a perspective of the structure-based methodologies aimed at deriving new insights for more potent and selective derivatives.
Collapse
|
47
|
Abstract
Trimethylamine N-oxide (TMAO) is a biologically active molecule and is a putative promoter of chronic diseases including atherosclerosis in humans. Host intestinal bacteria produce its precursor trimethylamine (TMA) from carnitine, choline, or choline-containing compounds. Most of the TMA produced is passively absorbed into portal circulation, and hepatic flavin-dependent monooxygenases (FMOs) efficiently oxidize TMA to TMAO. Both observational and experimental studies suggest a strong positive correlation between increased plasma TMAO concentrations and adverse cardiovascular events, such as myocardial infarction, stroke, and death. However, a clear mechanistic link between TMAO and such diseases is not yet validated. Therefore, it is debated whether increased TMAO concentrations are the cause or result of these diseases. Here, we have tried to review the current understanding of the properties and physiological functions of TMAO, its dietary sources, and its effects on human metabolism. Studies that describe the potential role of TMAO in the etiology of cardiovascular and other diseases are also discussed.
Collapse
Affiliation(s)
- Steven H Zeisel
- Nutrition Research Institute and Department of Nutrition, University of North Carolina, Kannapolis, North Carolina 28081;
| | - Manya Warrier
- Nutrition Research Institute and Department of Nutrition, University of North Carolina, Kannapolis, North Carolina 28081;
| |
Collapse
|
48
|
Brown JM, Hazen SL. Targeting of microbe-derived metabolites to improve human health: The next frontier for drug discovery. J Biol Chem 2017; 292:8560-8568. [PMID: 28389555 DOI: 10.1074/jbc.r116.765388] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Recent advances in metabolomic and genome mining approaches have uncovered a poorly understood metabolome that originates solely or in part from bacterial enzyme sources. Whether living on exposed surfaces or within our intestinal tract, our microbial inhabitants produce a remarkably diverse set of natural products and small molecule metabolites that can impact human health and disease. Highlighted here, the gut microbe-derived metabolite trimethylamine N-oxide has been causally linked to the development of cardiovascular diseases. Recent studies reveal drugging this pathway can inhibit atherosclerosis development in mice. Building on this example, we discuss challenges and untapped potential of targeting bacterial enzymology for improvements in human health.
Collapse
Affiliation(s)
- J Mark Brown
- From the Departments of Cellular and Molecular Medicine and .,Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, Ohio 44195
| | - Stanley L Hazen
- From the Departments of Cellular and Molecular Medicine and .,Center for Microbiome and Human Health, Cleveland Clinic, Cleveland, Ohio 44195.,Cardiovascular Medicine and
| |
Collapse
|
49
|
Bhutia YD, Ogura J, Sivaprakasam S, Ganapathy V. Gut Microbiome and Colon Cancer: Role of Bacterial Metabolites and Their Molecular Targets in the Host. CURRENT COLORECTAL CANCER REPORTS 2017; 13:111-118. [PMID: 30337849 DOI: 10.1007/s11888-017-0362-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Purpose of review The relationship between colonic bacteria and the host is symbiotic, but how communication between the two partners occurs is just beginning to be understood at the molecular level. Here, we highlight specific products of bacterial metabolism that are present in the colonic lumen and their molecular targets in the host that facilitate this communication. Recent findings Colonic epithelial cells and mucosal immune cells express several cell-surface receptors and nuclear receptors that are activated by specific bacterial metabolites, which impact multiple signaling pathways and expression of many genes. In addition, some bacterial metabolites also possess the ability to cause epigenetic changes in these cells via inhibition of selective enzymes involved in the maintenance of histone acetylation and DNA methylation patterns. Summary Colonic bacteria communicate with their host with selective metabolites that interact with host molecular targets. This chemical communication underlies a broad range of the biology and function of colonic epithelial cells and mucosal immune cells, which protect against inflammation and carcinogenesis in the colon under normal physiological conditions.
Collapse
Affiliation(s)
- Yangzom D Bhutia
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA, Tel.: 806-743-1282
| | - Jiro Ogura
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA, Tel.: 806-743-4101
| | - Sathish Sivaprakasam
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA, Tel.: 806-743-4117
| | - Vadivel Ganapathy
- Department of Cell Biology and Biochemistry, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| |
Collapse
|
50
|
Tonelli M, Espinoza S, Gainetdinov RR, Cichero E. Novel biguanide-based derivatives scouted as TAAR1 agonists: Synthesis, biological evaluation, ADME prediction and molecular docking studies. Eur J Med Chem 2017; 127:781-792. [DOI: 10.1016/j.ejmech.2016.10.058] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 10/25/2016] [Accepted: 10/26/2016] [Indexed: 12/14/2022]
|