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Mac CH, Tai HM, Huang SM, Peng HH, Sharma AK, Nguyen GLT, Chang PJ, Wang JT, Chang Y, Lin YJ, Sung HW. Orally Ingested Self-Powered Stimulators for Targeted Gut-Brain Axis Electrostimulation to Treat Obesity and Metabolic Disorders. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2310351. [PMID: 38591658 DOI: 10.1002/adma.202310351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 03/26/2024] [Indexed: 04/10/2024]
Abstract
Obesity is a significant health concern that often leads to metabolic dysfunction and chronic diseases. This study introduces a novel approach to combat obesity using orally ingested self-powered electrostimulators. These electrostimulators consist of piezoelectric BaTiO3 (BTO) particles conjugated with capsaicin (Cap) and aim to activate the vagus nerve. Upon ingestion by diet-induced obese (DIO) mice, the BTO@Cap particles specifically target and bind to Cap-sensitive sensory nerve endings in the gastric mucosa. In response to stomach peristalsis, these particles generate electrical signals. The signals travel via the gut-brain axis, ultimately influencing the hypothalamus. By enhancing satiety signals in the brain, this neuromodulatory intervention reduces food intake, promotes energy metabolism, and demonstrates minimal toxicity. Over a 3-week period of daily treatments, DIO mice treated with BTO@Cap particles show a significant reduction in body weight compared to control mice, while maintaining their general locomotor activity. Furthermore, this BTO@Cap particle-based treatment mitigates various metabolic alterations associated with obesity. Importantly, this noninvasive and easy-to-administer intervention holds potential for addressing other intracerebral neurological diseases.
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Affiliation(s)
- Cam-Hoa Mac
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Hsien-Meng Tai
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Sheng-Min Huang
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli, 350401, Taiwan
| | - Hsu-Hsia Peng
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Amit Kumar Sharma
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Giang Le Thi Nguyen
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Pei-Ju Chang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Jui-To Wang
- Neurological Institute, Department of Neurosurgery, Taipei Veterans General Hospital, Taipei, 11217, Taiwan
- Institute of Brain Science, National Yang-Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Yen Chang
- Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation and School of Medicine, Tzu Chi University, Hualien, 97004, Taiwan
| | - Yu-Jung Lin
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Hsing-Wen Sung
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
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Kanprakobkit W, Wichai U, Bunyapraphatsara N, Kielar F. Isolation of Fatty Acids from the Enzymatic Hydrolysis of Capsaicinoids and Their Use in Enzymatic Acidolysis of Coconut Oil. J Oleo Sci 2023; 72:1097-1111. [PMID: 37989304 DOI: 10.5650/jos.ess23112] [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] [Indexed: 11/23/2023] Open
Abstract
Herein we report the optimization of enzymatic hydrolysis of a mixture of capsaicinoids, capsaicin and dihydrocapsaicin obtained from chili peppers, and the utilization of the isolated fatty acids for the modification of coconut oil using enzyme catalyzed acidolysis. This work was carried out as the fatty acids that can be isolated from capsaicinoid hydrolysis have been shown to possess interesting biological properties. These biological properties could be better exploited by incorporating the fatty acids into a suitable delivery vehicle. The enzymatic hydrolysis of the mixture of capsaicin and dihydrocapsaicin was carried out using Novozym® 435 in phosphate buffer (pH 7.0) at 50℃. The enzyme catalyst could be reused in multiple cycles of the hydrolysis reaction. The desired 8-methyl-6-trans-nonenoic acid and 8-methylnonanoic acid were isolated from the hydrolysis reaction mixture using a simple extraction procedure with a 47.8% yield. This was carried out by first extracting the reaction mixture at pH 10 with ethyl acetate to remove any dissolved capsaicinoids and vanillyl amine side product. The fatty acids were isolated after adjustment of the pH of the reaction mixture to 5 and second extraction with ethyl acetate. The acidolysis of coconut oil with the obtained fatty acids was performed using Lipozyme® TL IM. The performance of the acidolysis reaction was evaluated using 1H-NMR spectroscopy and verified in selected cases using gas chromatography. The best performing conditions involved carrying out the acidolysis reaction at 60℃ with a 1.2 w/w ratio of the fatty acids to coconut oil and 10% enzyme loading for 72 h. This resulted in the incorporation of 26.61% and 9.86% of 8-methyl-6-trans-nonenoic acid and 8-methylnonanoic acid, respectively, into the modified coconut oil product. This product can act as a potential delivery vehicle for these interesting compounds.
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Affiliation(s)
- Winranath Kanprakobkit
- Department of Chemistry and Center of Excellence in Biomaterials, Faculty of Science, Naresuan University
| | - Uthai Wichai
- Department of Chemistry and Center of Excellence in Biomaterials, Faculty of Science, Naresuan University
| | | | - Filip Kielar
- Department of Chemistry and Center of Excellence in Biomaterials, Faculty of Science, Naresuan University
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Li Q, Gao R, Li Y, Fan B, Ma C, He YC. Improved biotransformation of lignin-valorized vanillin into vanillylamine in a sustainable bioreaction medium. BIORESOURCE TECHNOLOGY 2023; 384:129292. [PMID: 37295479 DOI: 10.1016/j.biortech.2023.129292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/06/2023] [Accepted: 06/06/2023] [Indexed: 06/12/2023]
Abstract
Lignin is a critical biopolymer for creating a large number of highly valuable biobased compounds. Vanillin, one of lignin-derived aromatics, can be used to synthesize vanillylamine that is a key fine chemical and pharmaceutical intermediate. To produce vanillylamine, a productive whole-cell-catalyzed biotransformation of vanillin was developed in deep eutectic solvent - surfactant - H2O media. One newly created recombinant E. coli 30CA cells expressing ω-transaminase and L-alanine dehydrogenase was employed to transform 50 mM and 60 mM vanillin into vanillylamine in the yield of 82.2% and 8.5% under 40 °C, respectively. The biotransamination efficiency was enhanced by introducing surfactant PEG-2000 (40 mM) and deep eutectic solvent ChCl:LA (5.0 wt%, pH 8.0), and the highest vanillylamine yield reached 90.0% from 60 mM vanillin. Building an effective bioprocess was utilized for transamination of lignin-derived vanillin to vanillylamine with newly created bacteria in an eco-friendly medium, which had potential application for valorization of lignin to value-added compounds.
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Affiliation(s)
- Qi Li
- School of Pharmacy, National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, PR China; State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Lifes, Hubei University, Wuhan 430062, Hubei Province, PR China
| | - Ruiying Gao
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Lifes, Hubei University, Wuhan 430062, Hubei Province, PR China
| | - Yucheng Li
- School of Pharmacy, National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, PR China
| | - Bo Fan
- School of Pharmacy, National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, PR China
| | - Cuiluan Ma
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Lifes, Hubei University, Wuhan 430062, Hubei Province, PR China
| | - Yu-Cai He
- School of Pharmacy, National-Local Joint Engineering Research Center of Biomass Refining and High-Quality Utilization, Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, PR China; State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Lifes, Hubei University, Wuhan 430062, Hubei Province, PR China; State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China.
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Molot J, Sears M, Anisman H. Multiple Chemical Sensitivity: It's time to catch up to the science. Neurosci Biobehav Rev 2023; 151:105227. [PMID: 37172924 DOI: 10.1016/j.neubiorev.2023.105227] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 05/06/2023] [Indexed: 05/15/2023]
Abstract
Multiple chemical sensitivity (MCS) is a complex medical condition associated with low dose chemical exposures. MCS is characterized by diverse features and common comorbidities, including fibromyalgia, cough hypersensitivity, asthma, and migraine, and stress/anxiety, with which the syndrome shares numerous neurobiological processes and altered functioning within diverse brain regions. Predictive factors linked to MCS comprise genetic influences, gene-environment interactions, oxidative stress, systemic inflammation, cell dysfunction, and psychosocial influences. The development of MCS may be attributed to the sensitization of transient receptor potential (TRP) receptors, notably TRPV1 and TRPA1. Capsaicin inhalation challenge studies demonstrated that TRPV1 sensitization is manifested in MCS, and functional brain imaging studies revealed that TRPV1 and TRPA1 agonists promote brain-region specific neuronal variations. Unfortunately, MCS has often been inappropriately viewed as stemming exclusively from psychological disturbances, which has fostered patients being stigmatized and ostracized, and often being denied accommodation for their disability. Evidence-based education is essential to provide appropriate support and advocacy. Greater recognition of receptor-mediated biological mechanisms should be incorporated in laws, and regulation of environmental exposures.
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Affiliation(s)
- John Molot
- Family Medicine, University of Ottawa Faculty of Medicine, Ottawa ON Canada; Ottawa Hospital Research Institute, Ottawa, ON, Canada; Department of Neuroscience, Carleton University, Ottawa Canada.
| | - Margaret Sears
- Family Medicine, University of Ottawa Faculty of Medicine, Ottawa ON Canada; Ottawa Hospital Research Institute, Ottawa, ON, Canada; Department of Neuroscience, Carleton University, Ottawa Canada.
| | - Hymie Anisman
- Family Medicine, University of Ottawa Faculty of Medicine, Ottawa ON Canada; Ottawa Hospital Research Institute, Ottawa, ON, Canada; Department of Neuroscience, Carleton University, Ottawa Canada.
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Molot J, Sears M, Marshall LM, Bray RI. Neurological susceptibility to environmental exposures: pathophysiological mechanisms in neurodegeneration and multiple chemical sensitivity. REVIEWS ON ENVIRONMENTAL HEALTH 2022; 37:509-530. [PMID: 34529912 DOI: 10.1515/reveh-2021-0043] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 08/13/2021] [Indexed: 05/23/2023]
Abstract
The World Health Organization lists air pollution as one of the top five risks for developing chronic non-communicable disease, joining tobacco use, harmful use of alcohol, unhealthy diets and physical inactivity. This review focuses on how host defense mechanisms against adverse airborne exposures relate to the probable interacting and overlapping pathophysiological features of neurodegeneration and multiple chemical sensitivity. Significant long-term airborne exposures can contribute to oxidative stress, systemic inflammation, transient receptor subfamily vanilloid 1 (TRPV1) and subfamily ankyrin 1 (TRPA1) upregulation and sensitization, with impacts on olfactory and trigeminal nerve function, and eventual loss of brain mass. The potential for neurologic dysfunction, including decreased cognition, chronic pain and central sensitization related to airborne contaminants, can be magnified by genetic polymorphisms that result in less effective detoxification. Onset of neurodegenerative disorders is subtle, with early loss of brain mass and loss of sense of smell. Onset of MCS may be gradual following long-term low dose airborne exposures, or acute following a recognizable exposure. Upregulation of chemosensitive TRPV1 and TRPA1 polymodal receptors has been observed in patients with neurodegeneration, and chemically sensitive individuals with asthma, migraine and MCS. In people with chemical sensitivity, these receptors are also sensitized, which is defined as a reduction in the threshold and an increase in the magnitude of a response to noxious stimulation. There is likely damage to the olfactory system in neurodegeneration and trigeminal nerve hypersensitivity in MCS, with different effects on olfactory processing. The associations of low vitamin D levels and protein kinase activity seen in neurodegeneration have not been studied in MCS. Table 2 presents a summary of neurodegeneration and MCS, comparing 16 distinctive genetic, pathophysiological and clinical features associated with air pollution exposures. There is significant overlap, suggesting potential comorbidity. Canadian Health Measures Survey data indicates an overlap between neurodegeneration and MCS (p < 0.05) that suggests comorbidity, but the extent of increased susceptibility to the other condition is not established. Nevertheless, the pathways to the development of these conditions likely involve TRPV1 and TRPA1 receptors, and so it is hypothesized that manifestation of neurodegeneration and/or MCS and possibly why there is divergence may be influenced by polymorphisms of these receptors, among other factors.
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Affiliation(s)
- John Molot
- Family Medicine, University of Ottawa Faculty of Medicine, North York, ON, Canada
| | | | | | - Riina I Bray
- Family and Community Medicine, University of Toronto, Toronto, ON, Canada
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Wu Z, Yang M, Zhao P, Zou F, Peng J, Deng Q, Duan G, Li H. The Association Between Long-Term Spicy-Food Consumption and the Incidence of Chronic Postsurgical Pain After Cesarean Delivery: An Observational Study. J Pain Res 2022; 15:2833-2844. [PMID: 36124036 PMCID: PMC9482407 DOI: 10.2147/jpr.s373030] [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: 05/01/2022] [Accepted: 09/06/2022] [Indexed: 11/23/2022] Open
Abstract
Background Our previous study found that a long-term diet incorporating spicy foods can reduce the human basal pain threshold. Capsaicin is the pungent ingredient in chili peppers. Transient receptor potential vanilloid type1 is the capsaicin receptor expressed in the oral cavity and is the primary sensory neuron of the “pain” pathway. Few studies have examined the association between long-term spicy diet and chronic postsurgical pain (CPSP). Women who underwent elective cesarean section (eCS) have consistent characteristics of CPSP. This study aimed to investigate the relationship between a long-term spicy diet and the incidence of CPSP after eCS. Methods Participants were divided into a low frequency group (LF, numerical rating scale (NRS)<5) for spicy food consumption and a high frequency group (HF, NRS≥5) by receiver operator characteristic analysis. The primary outcome was the incidence of CPSP three months after eCS. Propensity score matching (PSM) analysis was performed between the two frequency groups. Stepwise logistic regression analysis was then performed. Results Of the 1029 enrolled patients, data from 982 were analyzed 3 months after eCS. After PSM, the incidence of CPSP in the HF group (30.1% [108/359]) was higher than that in the LF group (19.8% [71/359]; P = 0.001). Compared with the LF group, the risk of CPSP in the HF group increased 1.61 times by 3 months (95% CI 1.18–2.20, P = 0.003). PSM results found that 1 year, the incidence of CPSP in the HF group (15.2% [56/369]) was higher than that in the LF group (8.1% [30/369], P = 0.003). Conclusion With an NRS≥5 as a boundary, women who consumed spicy food ≥ 2 days/week were more likely to have CPSP than those who consumed spicy food < 2 days/week.
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Affiliation(s)
- Zhuoxi Wu
- Department of Anesthesiology, Second Affiliated Hospital of Army Medical University, People's Liberation Army of China, Chongqing, People's Republic of China
| | - Mi Yang
- Department of Anesthesiology, Second Affiliated Hospital of Army Medical University, People's Liberation Army of China, Chongqing, People's Republic of China
| | - Peng Zhao
- Department of Anesthesiology, Second Affiliated Hospital of Army Medical University, People's Liberation Army of China, Chongqing, People's Republic of China.,Department of Anesthesiology, Chinese People's Liberation Army of China (PLA) No. 964 Hospital, Changchun, People's Republic of China
| | - Feng Zou
- Department of Anesthesiology, Second Affiliated Hospital of Army Medical University, People's Liberation Army of China, Chongqing, People's Republic of China
| | - Jing Peng
- Department of Anesthesiology, Second Affiliated Hospital of Army Medical University, People's Liberation Army of China, Chongqing, People's Republic of China
| | - Qiangting Deng
- Editorial Office of Journal of Third Military Medical University, Army Medical University, People's Liberation Army of China, Chongqing, People's Republic of China
| | - Guangyou Duan
- Department of Anesthesiology, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, People's Republic of China
| | - Hong Li
- Department of Anesthesiology, Second Affiliated Hospital of Army Medical University, People's Liberation Army of China, Chongqing, People's Republic of China
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7
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Robinson MA, Stefanovski D, You Y, Boston RC, Soma LR. Bayesian-based withdrawal estimates using pharmacokinetic parameters for two capsaicinoid-containing products administered to horses. J Vet Pharmacol Ther 2020; 44:349-358. [PMID: 33305843 DOI: 10.1111/jvp.12939] [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: 02/05/2020] [Revised: 10/17/2020] [Accepted: 11/24/2020] [Indexed: 11/30/2022]
Abstract
Capsaicinoids deter horses from chewing on bandages and are applied topically to provide analgesia to musculoskeletal injuries. They are banned during competition due to their nerve blocking properties. The pharmacokinetics of oral (PO) and direct gastric administration via nasogastric tube (NG), or topical (TOP) administration of two capsaicinoid-containing products were investigated, and the withdrawal times required prior to competition were estimated. Capsaicin (CAP) and dihydrocapsaicin (DCAP) were quantified in plasma, and both compounds were best described by a delayed absorption two compartment elimination model following PO administration and by a first order absorption one compartment elimination model following TOP administration. Capsaicin and DCAP could not be quantified in most samples following NG administration. Following PO administration, the time to maximum plasma concentration (Tmax ) for CAP and DCAP was 0.25 (0.08-0.50) hr. Following TOP application, the Tmax for CAP and DCAP was 4 (2-6) and 5 (3-12) hr, respectively. By 8 hr post-PO administration and 36 hr post-TOP application, CAP and DCAP were below the lower limit of quantification. Capsaicin and DCAP were not detected in urine samples. Withdrawal times were predicted using the 99.99% credibility interval limits of the pharmacokinetic parameters calculated with Bayesian estimation.
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Affiliation(s)
- Mary A Robinson
- Department of Clinical Studies - New Bolton Center, University of Pennsylvania School of Veterinary Medicine, Kennett Square, PA, USA.,Pennsylvania Equine Toxicology & Research Laboratory, West Chester, PA, USA
| | - Darko Stefanovski
- Department of Clinical Studies - New Bolton Center, University of Pennsylvania School of Veterinary Medicine, Kennett Square, PA, USA
| | - Youwen You
- Department of Clinical Studies - New Bolton Center, University of Pennsylvania School of Veterinary Medicine, Kennett Square, PA, USA.,Pennsylvania Equine Toxicology & Research Laboratory, West Chester, PA, USA
| | - Raymond C Boston
- Department of Clinical Studies - New Bolton Center, University of Pennsylvania School of Veterinary Medicine, Kennett Square, PA, USA
| | - Lawrence R Soma
- Department of Clinical Studies - New Bolton Center, University of Pennsylvania School of Veterinary Medicine, Kennett Square, PA, USA
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8
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The investigation of allosteric regulation mechanism of analgesic effect using SD rat taste bud tissue biosensor. Biosens Bioelectron 2019; 126:815-823. [DOI: 10.1016/j.bios.2018.11.046] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/09/2018] [Accepted: 11/22/2018] [Indexed: 01/09/2023]
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9
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Zak A, Siwinska N, Slowikowska M, Borowicz H, Szpot P, Zawadzki M, Niedzwiedz A. The detection of capsaicin and dihydrocapsaicin in horse serum following long-term local administration. BMC Vet Res 2018; 14:193. [PMID: 29914499 PMCID: PMC6006555 DOI: 10.1186/s12917-018-1518-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 06/06/2018] [Indexed: 11/21/2022] Open
Abstract
Background Capsaicin and dihydrocapsaicin are alkaloids with analgesic effects in humans and animals. When used locally, both of them minimalise pain sensation by defunctionalising nerve endings. According to the Federation Equestrian International Prohibited Substances List, these are substance banned in horse competitions. The aim of the study was to determine the detection time of capsaicin in both plasma and serum after long-term use of a gel recommended for commercial use and applied as intended. The objective of the study was to select the best material for the detection of capsaicin as a doping substance in horses. Methods Nine healthy mature horses were administered 0.1% capsaicin topically in the form of a commercial analgesic gel (15 g of the gel per limb) to the front limbs every 24 hours for five days with a polar fleece bandage. Blood serum and plasma were collected prior to gel application and in the 12th, 18th, 24th, 36th, 42nd, 48th, 60th, 84th, 108th, 132nd, 156th hour after the gel application. Qualitative and quantitative analysis was performed using ultra-high performance liquid chromatography coupled with a triple quadrupole mass spectrometry (UHPLC-QqQ-MS/MS). Results The concentration of capsaicin in the serum samples did not exceed the lower limit of quantification. Capsaicin was not detected in the plasma samples during the entire study period. Dihydrocapsaicin was not detected in blood serum or plasma. Conclusion The presented results suggest that capsaicin is not detected in horse serum in the 24-hour-periodfollowing its last application according to the dosage regimen used by owners and veterinarians for therapy rather than doping, based on a five day gel application and a polar bandage.
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Affiliation(s)
- A Zak
- Department of Internal Medicine and Clinic of Diseases of Horses, Dogs and Cats, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, pl. Grunwaldzki 47, 50-366, Wroclaw, Poland.
| | - N Siwinska
- Department of Internal Medicine and Clinic of Diseases of Horses, Dogs and Cats, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, pl. Grunwaldzki 47, 50-366, Wroclaw, Poland
| | - M Slowikowska
- Department of Internal Medicine and Clinic of Diseases of Horses, Dogs and Cats, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, pl. Grunwaldzki 47, 50-366, Wroclaw, Poland
| | - H Borowicz
- Department of Internal Medicine and Clinic of Diseases of Horses, Dogs and Cats, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, pl. Grunwaldzki 47, 50-366, Wroclaw, Poland
| | - P Szpot
- Department of Forensic Medicine, Wroclaw Medical University, ul. Mikulicza-Radeckiego 4, 50-345, Wroclaw, Poland
| | - M Zawadzki
- Department of Forensic Medicine, Wroclaw Medical University, ul. Mikulicza-Radeckiego 4, 50-345, Wroclaw, Poland
| | - A Niedzwiedz
- Department of Internal Medicine and Clinic of Diseases of Horses, Dogs and Cats, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, pl. Grunwaldzki 47, 50-366, Wroclaw, Poland
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Mostinski Y, Noy G, Kumar R, Tsvelikhovsky D, Priel A. Tricyclic Spirolactones as Modular TRPV1 Synthetic Agonists. ACS Chem Neurosci 2017; 8:1688-1696. [PMID: 28520395 DOI: 10.1021/acschemneuro.7b00127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
TRPV1 is a prominent signal integrator of the pain system, known to be activated by vanilloids, a family of endogenous and exogenous pain-evoking molecules, through the vanilloid-binding site (VBS). The extensive preclinical profiling of small molecule inhibitors provides intriguing evidence that TRPV1 inhibition can be a useful therapeutic approach. However, the dissimilarity of chemical species that activate TRPV1 creates a major obstacle to understanding the molecular mechanism of pain induction, which is viewed as a pivotal trait of the somatosensory system. Here, we establish the existence of a unique family of synthetic agonists that interface with TRPV1 through the VBS, containing none of the molecular domains previously believed to be required for this interaction. The overarching value obtained from our inquiry is the novel advancement of the existing TRPV1 activation model. These findings uncover new potential in the area of pain treatment, providing a novel synthetic platform.
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Affiliation(s)
- Yelena Mostinski
- The
Institute for Drug Research, Division of Medicinal Chemistry, School
of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Gilad Noy
- The
Institute for Drug Research, Division of Pharmacology, School of Pharmacy,
Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Rakesh Kumar
- The
Institute for Drug Research, Division of Pharmacology, School of Pharmacy,
Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Dmitry Tsvelikhovsky
- The
Institute for Drug Research, Division of Medicinal Chemistry, School
of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Avi Priel
- The
Institute for Drug Research, Division of Pharmacology, School of Pharmacy,
Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
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Green C, Hopkins FB, Lindsay CD, Riches JR, Timperley CM. Painful chemistry! From barbecue smoke to riot control. PURE APPL CHEM 2017. [DOI: 10.1515/pac-2016-0911] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractPain! Most humans feel it throughout their lives. The molecular mechanisms underlying the phenomenon are still poorly understood. This is especially true of pain triggered in response to molecules of a certain shape and reactivity present in the environment. Such molecules can interact with the sensory nerve endings of the eyes, nose, throat and lungs to cause irritation that can range from mild to severe. The ability to alert to the presence of such potentially harmful substances has been termed the ‘common chemical sense’ and is thought to be distinct from the senses of smell or taste, which are presumed to have evolved later. Barbecue a burger excessively and you self-experiment. Fatty acids present in the meat break off their glycerol anchor under the thermal stress. The glycerol loses two molecules of water and forms acrolein, whose assault on the eyes is partly responsible for the tears elicited by smoke. Yet the smell and taste of the burger are different experiences. It was this eye-watering character of acrolein that prompted its use as a warfare agent during World War I. It was one of several ‘lachrymators’ deployed to harass, and the forerunner of safer chemicals, such as ‘tear gas’ CS, developed for riot control. The history of development and mechanism of action of some sensory irritants is discussed here in relation to recent advice from the Scientific Advisory Board (SAB) of the Organisation for the Prohibition of Chemical Weapons (OPCW) on chemicals that conform to the definition of a riot control agent (RCA) under the Chemical Weapons Convention.
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Affiliation(s)
- Christopher Green
- 1Defence Science and Technology Laboratory (DSTL), Porton Down, Salisbury, Wiltshire SP4 0JQ, United Kingdom of Great Britain and Northern Ireland
| | - Farrha B. Hopkins
- 1Defence Science and Technology Laboratory (DSTL), Porton Down, Salisbury, Wiltshire SP4 0JQ, United Kingdom of Great Britain and Northern Ireland
| | - Christopher D. Lindsay
- 1Defence Science and Technology Laboratory (DSTL), Porton Down, Salisbury, Wiltshire SP4 0JQ, United Kingdom of Great Britain and Northern Ireland
| | - James R. Riches
- 1Defence Science and Technology Laboratory (DSTL), Porton Down, Salisbury, Wiltshire SP4 0JQ, United Kingdom of Great Britain and Northern Ireland
| | - Christopher M. Timperley
- 1Defence Science and Technology Laboratory (DSTL), Porton Down, Salisbury, Wiltshire SP4 0JQ, United Kingdom of Great Britain and Northern Ireland
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Hwang SH, Wagner K, Xu J, Yang J, Li X, Cao Z, Morisseau C, Lee KSS, Hammock BD. Chemical synthesis and biological evaluation of ω-hydroxy polyunsaturated fatty acids. Bioorg Med Chem Lett 2016; 27:620-625. [PMID: 28025003 DOI: 10.1016/j.bmcl.2016.12.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 11/30/2016] [Accepted: 12/01/2016] [Indexed: 01/17/2023]
Abstract
ω-Hydroxy polyunsaturated fatty acids (PUFAs), natural metabolites from arachidonic acid (ARA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) were prepared via convergent synthesis approach using two key steps: Cu-mediated CC bond formation to construct methylene skipped poly-ynes and a partial alkyne hydrogenation where the presence of excess 2-methyl-2-butene as an additive that is proven to be critical for the success of partial reduction of the poly-ynes to the corresponding cis-alkenes without over-hydrogenation. The potential biological function of ω-hydroxy PUFAs in pain was evaluated in naive rats. Following intraplantar injection, 20-hydroxyeicosatetraenoic acid (20-HETE, ω-hydroxy ARA) generated an acute decrease in paw withdrawal thresholds in a mechanical nociceptive assay indicating pain, but no change was observed from rats which received either 20-hydroxyeicosapentaenoic acid (20-HEPE, ω-hydroxy EPA) or 22-hydroxydocosahexaenoic acid (22-HDoHE, ω-hydroxy DHA). We also found that both 20-HEPE and 22-HDoHE are more potent than 20-HETE to activate murine transient receptor potential vanilloid receptor1 (mTRPV1).
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Affiliation(s)
- Sung Hee Hwang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Karen Wagner
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Jian Xu
- Jiangsu Provincial Key Laboratory of TCM Evaluation and Development, China Pharmaceutical University, 639, Longmian Ave, Jiangning District, Nanjing, Jiangsu 211198, PR China
| | - Jun Yang
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Xichun Li
- Jiangsu Provincial Key Laboratory of TCM Evaluation and Development, China Pharmaceutical University, 639, Longmian Ave, Jiangning District, Nanjing, Jiangsu 211198, PR China
| | - Zhengyu Cao
- Jiangsu Provincial Key Laboratory of TCM Evaluation and Development, China Pharmaceutical University, 639, Longmian Ave, Jiangning District, Nanjing, Jiangsu 211198, PR China
| | - Christophe Morisseau
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Kin Sing Stephen Lee
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Bruce D Hammock
- Department of Entomology and Nematology, and UC Davis Comprehensive Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA.
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Basith S, Cui M, Hong S, Choi S. Harnessing the Therapeutic Potential of Capsaicin and Its Analogues in Pain and Other Diseases. Molecules 2016; 21:molecules21080966. [PMID: 27455231 PMCID: PMC6272969 DOI: 10.3390/molecules21080966] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/27/2016] [Accepted: 07/15/2016] [Indexed: 12/14/2022] Open
Abstract
Capsaicin is the most predominant and naturally occurring alkamide found in Capsicum fruits. Since its discovery in the 19th century, the therapeutic roles of capsaicin have been well characterized. The potential applications of capsaicin range from food flavorings to therapeutics. Indeed, capsaicin and few of its analogues have featured in clinical research covered by more than a thousand patents. Previous records suggest pleiotropic pharmacological activities of capsaicin such as an analgesic, anti-obesity, anti-pruritic, anti-inflammatory, anti-apoptotic, anti-cancer, anti-oxidant, and neuro-protective functions. Moreover, emerging data indicate its clinical significance in treating vascular-related diseases, metabolic syndrome, and gastro-protective effects. The dearth of potent drugs for management of such disorders necessitates the urge for further research into the pharmacological aspects of capsaicin. This review summarizes the historical background, source, structure and analogues of capsaicin, and capsaicin-triggered TRPV1 signaling and desensitization processes. In particular, we will focus on the therapeutic roles of capsaicin and its analogues in both normal and pathophysiological conditions.
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Affiliation(s)
- Shaherin Basith
- National Leading Research Laboratory (NLRL) of Molecular Modeling & Drug Design, College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea.
| | - Minghua Cui
- National Leading Research Laboratory (NLRL) of Molecular Modeling & Drug Design, College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea.
| | - Sunhye Hong
- National Leading Research Laboratory (NLRL) of Molecular Modeling & Drug Design, College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea.
| | - Sun Choi
- National Leading Research Laboratory (NLRL) of Molecular Modeling & Drug Design, College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea.
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Sulzberger M, Worthmann AC, Holtzmann U, Buck B, Jung K, Schoelermann A, Rippke F, Stäb F, Wenck H, Neufang G, Grönniger E. Effective treatment for sensitive skin: 4-t-butylcyclohexanol and licochalcone A. J Eur Acad Dermatol Venereol 2016; 30 Suppl 1:9-17. [DOI: 10.1111/jdv.13529] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2015] [Indexed: 11/29/2022]
Affiliation(s)
- M. Sulzberger
- Research & Development; Beiersdorf AG; Hamburg Germany
| | | | - U. Holtzmann
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - B. Buck
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - K.A. Jung
- Research & Development; Beiersdorf AG; Hamburg Germany
| | | | - F. Rippke
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - F. Stäb
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - H. Wenck
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - G. Neufang
- Research & Development; Beiersdorf AG; Hamburg Germany
| | - E. Grönniger
- Research & Development; Beiersdorf AG; Hamburg Germany
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15
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Halme M, Pesonen M, Salo H, Söderström M, Pasanen M, Vähäkangas K, Vanninen P. Comparison of in vitro metabolism and cytotoxicity of capsaicin and dihydrocapsaicin. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1009-1010:17-24. [DOI: 10.1016/j.jchromb.2015.11.042] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 11/19/2015] [Accepted: 11/21/2015] [Indexed: 12/20/2022]
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16
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Lee Y, Hong S, Cui M, Sharma PK, Lee J, Choi S. Transient receptor potential vanilloid type 1 antagonists: a patent review (2011 - 2014). Expert Opin Ther Pat 2015; 25:291-318. [PMID: 25666693 DOI: 10.1517/13543776.2015.1008449] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
INTRODUCTION Transient receptor potential vanilloid type 1 (TRPV1) is a nonselective cation channel that can be activated by noxious heat, low pH and vanilloid compounds such as capsaicin. Since TRPV1 acts as an integrator of painful stimuli, TRPV1 antagonists can be used as promising therapeutics for new types of analgesics. AREAS COVERED This review article covers the patents that claim TRPV1 antagonists and were published during 2011 - 2014. The patent evaluation is organized according to the applicant companies, and the representative chemical entities with important in vitro and in vivo data are summarized. EXPERT OPINION Many pharmaceutical companies showed promising results in the discovery of potent small molecule TRPV1 antagonists, and recently, a number of small molecule TRPV1 antagonists have been advanced into clinical trials. Unfortunately, several candidate molecules showed critical side effects such as hyperthermia and impaired noxious heat sensation in humans, leading to their withdrawal from clinical trials. Some TRPV1 antagonists patented in recent years (2011 - 2014) overcame these undesirable side effects, making the development of TRPV1 antagonists much more promising.
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Affiliation(s)
- Yoonji Lee
- Ewha Womans University, National Leading Research Laboratory of Molecular Modeling and Drug Design, College of Pharmacy, Graduate School of Pharmaceutical Sciences, and Global Top 5 Research Program , Seoul 120-750 , Korea +82 2 3277 4503 ; +82 2 3277 2851 ;
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17
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Wells KM, Mehrman SJ, Abdel-Magid AF, Ferraro C, Scott L, Zhong HM, Teleha CA, Ballentine S, Li X, Russell RK, Spink JM, Diamond C, Youells S, Zhang Y, Tsay FR, Cesco-Cancia S, Manzo SM, Beauchamp DA. Synthesis of Mavatrep: A Potent Antagonist of Transient Receptor Potential Vanilloid-1. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00271] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kenneth M. Wells
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Steven J. Mehrman
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Ahmed F. Abdel-Magid
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Caterina Ferraro
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Lorraine Scott
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Hua Marlon Zhong
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Christopher A. Teleha
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Scott Ballentine
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Xun Li
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Ronald K. Russell
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Jan M. Spink
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Craig Diamond
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Scott Youells
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Yongzheng Zhang
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Fuh-Rong Tsay
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Sergio Cesco-Cancia
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Stephen M. Manzo
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
| | - Derek A. Beauchamp
- Janssen Research and Development, LLC, Welsh & McKean Roads, Spring House, Pennsylvania 19477-0776, United States
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Congiu C, Onnis V, Balboni G, Schiano-Moriello A, Di Marzo V, De Petrocellis L. TRPV1 modulators: Synthesis and in vitro evaluation of 1-heteroaryl piperidinecarboxamide and piperazinylurea derivatives. Eur J Med Chem 2015; 100:129-38. [PMID: 26079089 DOI: 10.1016/j.ejmech.2015.05.041] [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: 02/04/2015] [Revised: 04/21/2015] [Accepted: 05/26/2015] [Indexed: 10/23/2022]
Abstract
A series of new 1-heteroaryl piperidinecarboxamide and piperazinylurea derivatives was synthesized and evaluated as TRPV1 modulators in a Ca(2+) channel assay in HEK-293 cells overexpressing the human recombinant TRPV1 channel. Structural variations in the putative key portions of the molecules afforded several compounds endowed with agonist and/or antagonist/desensitizing activity at low micromolar concentration. As promising examples from this series, the piperidine-3-carboxamide derivative 31 exerts agonist/desensitizing activity at low micromolar concentration, while piperazinylurea derivatives 39 and 41 act as antagonists with sub-micromolar potency.
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Affiliation(s)
- Cenzo Congiu
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy.
| | - Valentina Onnis
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy
| | - Gianfranco Balboni
- Department of Life and Environmental Sciences, Unit of Pharmaceutical, Pharmacological and Nutraceutical Sciences, University of Cagliari, Via Ospedale 72, 09124 Cagliari, Italy
| | - Aniello Schiano-Moriello
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, National Research Council, Via Campi Flegrei 34, Comprensorio Olivetti, 80078 Pozzuoli, Naples, Italy
| | - Vincenzo Di Marzo
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, National Research Council, Via Campi Flegrei 34, Comprensorio Olivetti, 80078 Pozzuoli, Naples, Italy
| | - Luciano De Petrocellis
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, National Research Council, Via Campi Flegrei 34, Comprensorio Olivetti, 80078 Pozzuoli, Naples, Italy
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19
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20
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van Veghel D, Cleynhens J, Pearce LV, DeAndrea-Lazarus IA, Blumberg PM, Van Laere K, Verbruggen A, Bormans G. New transient receptor potential vanilloid subfamily member 1 positron emission tomography radioligands: synthesis, radiolabeling, and preclinical evaluation. ACS Chem Neurosci 2013; 4:624-34. [PMID: 23421633 DOI: 10.1021/cn300233v] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The transient receptor potential vanilloid subfamily member 1 (TRPV1) cation channel is known to be involved in pain nociception and neurogenic inflammation, and accumulating evidence suggests that it plays an important role in several central nervous system (CNS)-related disorders. TRPV1-specific positron emission tomography (PET) radioligands can serve as powerful tools in TRPV1-related (pre)clinical research and drug design. We have synthesized several potent TRPV1 antagonists and accompanying precursors for radiolabeling with carbon-11 or fluorine-18. The cinnamic acid derivative [(11)C]DVV24 and the aminoquinazoline [(18)F]DVV54 were successfully synthesized, and their biological behavior was studied. In addition, the in vivo behavior of a (123)I-labeled analogue of iodo-resiniferatoxin (I-RTX), a well-known TRPV1 antagonist, was evaluated. The binding affinities of DVV24 and DVV54 for human TRPV1 were 163 ± 28 and 171 ± 48 nM, respectively. [(11)C]DVV24, but not [(18)F]DVV54 or (123)I-RTX, showed retention in the trigeminal nerve, known to abundantly express TRPV1. Nevertheless, it appears that ligands with higher binding affinities will be required to allow in vivo imaging of TRPV1 via PET.
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Affiliation(s)
- Daisy van Veghel
- Laboratory for Radiopharmacy, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Campus Gasthuisberg O&N2, Herestraat 49 box 821, 3000 Leuven, Belgium
| | - Jan Cleynhens
- Laboratory for Radiopharmacy, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Campus Gasthuisberg O&N2, Herestraat 49 box 821, 3000 Leuven, Belgium
| | - Larry V. Pearce
- Laboratory of Cancer Biology and
Genetics, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Building 37, Room 4048,
37 Convent Drive, MSC 4255, Bethesda, Maryland 20892-4255, United
States
| | - Ian A. DeAndrea-Lazarus
- Laboratory of Cancer Biology and
Genetics, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Building 37, Room 4048,
37 Convent Drive, MSC 4255, Bethesda, Maryland 20892-4255, United
States
| | - Peter M. Blumberg
- Laboratory of Cancer Biology and
Genetics, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Building 37, Room 4048,
37 Convent Drive, MSC 4255, Bethesda, Maryland 20892-4255, United
States
| | - Koen Van Laere
- Nuclear Medicine and
Molecular Imaging, University Hospital and KU Leuven, Leuven, Belgium
| | - Alfons Verbruggen
- Laboratory for Radiopharmacy, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Campus Gasthuisberg O&N2, Herestraat 49 box 821, 3000 Leuven, Belgium
| | - Guy Bormans
- Laboratory for Radiopharmacy, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Campus Gasthuisberg O&N2, Herestraat 49 box 821, 3000 Leuven, Belgium
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You Y, Uboh CE, Soma LR, Guan F, Taylor D, Li X, Liu Y, Chen J. Validated UHPLC–MS-MS Method for Rapid Analysis of Capsaicin and Dihydrocapsaicin in Equine Plasma for Doping Control. J Anal Toxicol 2013; 37:122-32. [DOI: 10.1093/jat/bks098] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Jansson ET, Trkulja CL, Ahemaiti A, Millingen M, Jeffries GD, Jardemark K, Orwar O. Effect of cholesterol depletion on the pore dilation of TRPV1. Mol Pain 2013; 9:1. [PMID: 23279936 PMCID: PMC3560271 DOI: 10.1186/1744-8069-9-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Accepted: 01/02/2012] [Indexed: 02/03/2023] Open
Abstract
The TRPV1 ion channel is expressed in nociceptors, where pharmacological modulation of its function may offer a means of alleviating pain and neurogenic inflammation processes in the human body. The aim of this study was to investigate the effects of cholesterol depletion of the cell on ion-permeability of the TRPV1 ion channel. The ion-permeability properties of TRPV1 were assessed using whole-cell patch-clamp and YO-PRO uptake rate studies on a Chinese hamster ovary (CHO) cell line expressing this ion channel. Prolonged capsaicin-induced activation of TRPV1 with N-methyl-D-glucamine (NMDG) as the sole extracellular cation, generated a biphasic current which included an initial outward current followed by an inward current. Similarly, prolonged proton-activation (pH 5.5) of TRPV1 under hypocalcemic conditions also generated a biphasic current including a fast initial current peak followed by a larger second one. Patch-clamp recordings of reversal potentials of TRPV1 revealed an increase of the ion-permeability for NMDG during prolonged activation of this ion channel under hypocalcemic conditions. Our findings show that cholesterol depletion inhibited both the second current, and the increase in ion-permeability of the TRPV1 channel, resulting from sustained agonist-activation with capsaicin and protons (pH 5.5). These results were confirmed with YO-PRO uptake rate studies using laser scanning confocal microscopy, where cholesterol depletion was found to decrease TRPV1 mediated uptake rates of YO-PRO. Hence, these results propose a novel mechanism by which cellular cholesterol depletion modulates the function of TRPV1, which may constitute a novel approach for treatment of neurogenic pain.
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Affiliation(s)
- Erik T Jansson
- Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
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van Veghel D, Cleynhens J, Pearce LV, Blumberg PM, Van Laere K, Verbruggen A, Bormans G. Synthesis and biological evaluation of [¹¹C]SB366791: a new PET-radioligand for in vivo imaging of the TRPV1 receptor. Nucl Med Biol 2012; 40:141-7. [PMID: 23141549 DOI: 10.1016/j.nucmedbio.2012.08.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Revised: 06/04/2012] [Accepted: 08/27/2012] [Indexed: 10/27/2022]
Abstract
INTRODUCTION The transient receptor potential vanilloid subfamily member 1 (TRPV1) receptor, a non-selective cation channel, is known for its key role in pain nociception and neurogenic inflammation. TRPV1 expression has been demonstrated in diverse tissues and an essential role for TRPV1 in various disorders has been suggested. A TRPV1-specific PET-radioligand can serve as a useful tool for further in vivo research in animals and directly in humans. In this study, we report the synthesis and biological evaluation of a carbon-11 labelled analogue of N-(3-methoxyphenyl)-4-chlorocinnamide (SB366791) which was reported as a specific high-affinity antagonist for TRPV1. METHODS The new tracer was evaluated with respect to log D and biodistribution in control, pretreated and TRPV1⁻/⁻ mice. The percentage of radiometabolites of [¹¹C]SB366791 was determined in mouse plasma and brain. RESULTS [¹¹C] SB366791 was obtained in good yield (69%±11%; isolated amounts 3034-5032MBq) and high specific activity (390±215 GBq/μmol). The tracer was efficiently cleared from blood and all major organs via hepatobiliary and renal pathways. Initial brain uptake was high (1.6% ID) and wash-out from brain was rapid. The retention of [¹¹C] SB366791 in the trigeminal nerve of control mice was prominent. The in vitro binding affinity of SB366791 was determined to be 280±56 nM and 780±140 nM for human and rat TRPV1, respectively. CONCLUSIONS [¹¹C] SB366791 has favourable biodistribution characteristics in mice. However the obtained low binding affinity for TRPV1 may not be sufficient to use the current compound as PET tracer.
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Cho Y, Kim MS, Kim HS, Ann JH, Lee J, Pearce LV, Pavlyukovets VA, Morgan MA, Blumberg PM, Lee J. The SAR analysis of TRPV1 agonists with the α-methylated B-region. Bioorg Med Chem Lett 2012; 22:5227-31. [PMID: 22796184 PMCID: PMC3799874 DOI: 10.1016/j.bmcl.2012.06.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 06/18/2012] [Accepted: 06/19/2012] [Indexed: 10/28/2022]
Abstract
A series of TRPV1 agonists with amide, reverse amide, and thiourea groups in the B-region and their corresponding α-methylated analogues were investigated. Whereas the α-methylation of the amide B-region enhanced the binding affinities and potencies as agonists, that of the reverse amide and thiourea led to a reduction in receptor affinity. The analysis indicated that proper hydrogen bonding as well as steric effects in the B-region are critical for receptor binding.
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Affiliation(s)
- Yongsung Cho
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, Korea
| | - Myeong Seop Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, Korea
| | - Ho Shin Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, Korea
| | - Ji Hyae Ann
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, Korea
| | - Jiyoun Lee
- Department of Global Medical Science, Sungshin Women’s University, Seoul 142-732, Korea
| | - Larry V. Pearce
- Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Vladimir A. Pavlyukovets
- Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Matthew A. Morgan
- Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Peter M. Blumberg
- Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Jeewoo Lee
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, Korea
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Armero P, Muriel C, López M, Santos J, González-Sarmiento R. Análisis de polimorfismos del gen TRPV1 en pacientes españoles con dolor neuropático. Med Clin (Barc) 2012; 139:1-4. [DOI: 10.1016/j.medcli.2011.10.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 10/07/2011] [Accepted: 10/11/2011] [Indexed: 10/28/2022]
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Zaccaro L, García-López MT, González-Muñiz R, García-Martínez C, Ferrer-Montiel A, Albericio F, Royo M. TRPV1 modulators: Structure–activity relationships using a rational combinatorial approach. Bioorg Med Chem Lett 2011; 21:3541-5. [DOI: 10.1016/j.bmcl.2011.04.141] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2011] [Revised: 04/26/2011] [Accepted: 04/29/2011] [Indexed: 01/09/2023]
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27
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Lee JH, Lee Y, Ryu H, Kang DW, Lee J, Lazar J, Pearce LV, Pavlyukovets VA, Blumberg PM, Choi S. Structural insights into transient receptor potential vanilloid type 1 (TRPV1) from homology modeling, flexible docking, and mutational studies. J Comput Aided Mol Des 2011; 25:317-27. [PMID: 21448716 DOI: 10.1007/s10822-011-9421-5] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Accepted: 03/16/2011] [Indexed: 11/29/2022]
Abstract
The transient receptor potential vanilloid subtype 1 (TRPV1) is a non-selective cation channel composed of four monomers with six transmembrane helices (TM1-TM6). TRPV1 is found in the central and peripheral nervous system, and it is an important therapeutic target for pain relief. We describe here the construction of a tetrameric homology model of rat TRPV1 (rTRPV1). We experimentally evaluated by mutational analysis the contribution of residues of rTRPV1 contributing to ligand binding by the prototypical TRPV1 agonists, capsaicin and resiniferatoxin (RTX). We then performed docking analysis using our homology model. The docking results with capsaicin and RTX showed that our homology model was reliable, affording good agreement with our mutation data. Additionally, the binding mode of a simplified RTX (sRTX) ligand as predicted by the modeling agreed well with those of capsaicin and RTX, accounting for the high binding affinity of the sRTX ligand for TRPV1. Through the homology modeling, docking and mutational studies, we obtained important insights into the ligand-receptor interactions at the molecular level which should prove of value in the design of novel TRPV1 ligands.
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Affiliation(s)
- Jin Hee Lee
- College of Pharmacy, Division of Life and Pharmaceutical Sciences, Ewha Womans University, Seoul, Korea
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Kueper T, Krohn M, Haustedt LO, Hatt H, Schmaus G, Vielhaber G. Inhibition of TRPV1 for the treatment of sensitive skin. Exp Dermatol 2010; 19:980-6. [DOI: 10.1111/j.1600-0625.2010.01122.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Ferrini F, Salio C, Lossi L, Gambino G, Merighi A. Modulation of inhibitory neurotransmission by the vanilloid receptor type 1 (TRPV1) in organotypically cultured mouse substantia gelatinosa neurons. Pain 2010; 150:128-140. [DOI: 10.1016/j.pain.2010.04.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Revised: 01/28/2010] [Accepted: 04/12/2010] [Indexed: 11/25/2022]
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Duncton MA, Ayala L, Kaub C, Janagani S, Edwards WT, Orike N, Ramamoorthy K, Kincaid J, Kelly MG. Dibutyl 2-(trifluoromethyl)cyclopropylboronate as a useful (trifluoromethyl)cyclopropyl donor: application to antagonists of TRPV1. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.12.073] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Analgesic potential of TRPV1 antagonists. Biochem Pharmacol 2009; 78:211-6. [DOI: 10.1016/j.bcp.2009.02.014] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2009] [Revised: 02/10/2009] [Accepted: 02/16/2009] [Indexed: 12/20/2022]
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Winkler M, Moraux T, Khairy HA, Scott RH, Slawin AMZ, O'Hagan D. Synthesis and Vanilloid Receptor (TRPV1) Activity of the Enantiomers of α-Fluorinated Capsaicin. Chembiochem 2009; 10:823-8. [DOI: 10.1002/cbic.200800709] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Van Ryssen MP, Avlonitis N, Giniatullin R, McDougall C, Carr JL, Stanton-Humphreys MN, Borgström ELA, Brown CTA, Fayuk D, Surin A, Niittykoski M, Khiroug L, Conway SJ. Synthesis, photolysis studies and in vitro photorelease of caged TRPV1 agonists and antagonists. Org Biomol Chem 2009; 7:4695-707. [DOI: 10.1039/b914981c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Avlonitis N, Chalmers S, McDougall C, Stanton-Humphreys MN, Brown CTA, McCarron JG, Conway SJ. Caged AG10: new tools for spatially predefined mitochondrial uncoupling. MOLECULAR BIOSYSTEMS 2009; 5:450-7. [DOI: 10.1039/b820415m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Korepanova A, Pereda-Lopez A, Solomon LR, Walter KA, Lake MR, Bianchi BR, McDonald HA, Neelands TR, Shen J, Matayoshi ED, Moreland RB, Chiu ML. Expression and purification of human TRPV1 in baculovirus-infected insect cells for structural studies. Protein Expr Purif 2008; 65:38-50. [PMID: 19121396 DOI: 10.1016/j.pep.2008.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2008] [Revised: 11/11/2008] [Accepted: 12/03/2008] [Indexed: 10/21/2022]
Abstract
TRPV1 is a ligand-gated cation channel that is involved in acute thermal nociception and neurogenic inflammation. By using the GP67 signal peptide, high levels of full-length human TRPV1 was expressed in High Five insect cells using the baculovirus expression system. The functional activity of the expressed TRPV1 was confirmed by whole-cell ligand-gated ion flux recordings in the presence of capsaicin and low pH and via specific ligand binding to the isolated cellular membranes. Efficient solubilization and purification protocols have resulted in milligram amounts of detergent-solubilized channel at 80-90% purity after Ni2+ IMAC chromatography and size exclusion chromatography. Western blot analysis of amino and carboxyl terminal domains and MS of tryptic digestions of purified protein confirmed the presence of the full-length human TRPV1. Specific ligand binding experiments confirmed the protein integrity of the purified human TRPV1.
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Affiliation(s)
- Alla Korepanova
- Department of Structural Biology, R46Y, Abbott Laboratories, Bldg. AP10-LL8, 100 Abbott Park Rd., Abbott Park, IL 60064-6098, USA.
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