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Wang S, Chen Y, Lu Y, Jiang D, Lin H, Jiang Z, Tang J, Dong W, Zhao J. Interaction of pepper numbing substances with myofibrillar proteins and numbness perception under thermal conditions: A structural mechanism analysis. Food Chem 2024; 449:139203. [PMID: 38599105 DOI: 10.1016/j.foodchem.2024.139203] [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: 01/30/2024] [Revised: 03/18/2024] [Accepted: 03/29/2024] [Indexed: 04/12/2024]
Abstract
This study examined the interaction between myofibrillar proteins (MPs) and the numbing substance hydroxy-α-sanshool (α-SOH) in a thermal environment, and provided an explanation of the numbness perception mechanism through muti-spectroscopic and molecular dynamics simulation methodology. Results showed that addition of α-SOH could reduce the particle size and molecular weight of MPs, accompanied by changes in the tertiary and secondary structure, causing the α-helix of MPs transitioned to β-sheet and β-turn due to the reorganization of hydrogen bonds. After a moderate heating (60 or 70 °C), MPs could form the stable complexes with α-SOH that were associated with attachment sites and protein wrapping. The thermal process might convert a portion of α-SOH' into hydroxy-β-sanshool' (β-SOH'). When docking with the sensory receptor TRPV1, the RMSD, RMSF and binding free energy all showed that β-SOH' demonstrated a low affinity, thereby reducing the numbing perception. These findings can provide a theoretical foundation for the advanced processing of numbing meat products.
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Affiliation(s)
- Shuaiqian Wang
- School of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Yu Chen
- School of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Yan Lu
- School of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Diandian Jiang
- School of Food and Bioengineering, Xihua University, Chengdu 610039, China
| | - Hongbin Lin
- School of Food and Bioengineering, Xihua University, Chengdu 610039, China; Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing, Chengdu 610039, China
| | - Zhenju Jiang
- School of Food and Bioengineering, Xihua University, Chengdu 610039, China; Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing, Chengdu 610039, China
| | - Jie Tang
- School of Food and Bioengineering, Xihua University, Chengdu 610039, China; Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing, Chengdu 610039, China
| | - Wei Dong
- School of Food and Bioengineering, Xihua University, Chengdu 610039, China; Beijing Laboratory of Food Quality and Safety/Key Laboratory of Alcoholic Beverages Quality and Safety of China Light Industry, Beijing Technology and Business University, Beijing 100048, China
| | - Jie Zhao
- School of Food and Bioengineering, Xihua University, Chengdu 610039, China; Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing, Chengdu 610039, China.
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Liu M, Guo J, Lu J, Chen Y, Deng X, Zhang S, Guan S. Capsaicin alleviates acute alcohol-induced pyroptosis by activating ESCRT-III-dependent cell membrane repair in hepatocytes. Food Funct 2024; 15:8395-8407. [PMID: 39036891 DOI: 10.1039/d4fo00806e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
Capsaicin (CAP), the active ingredient in hot chilli peppers, has anti-inflammatory and hepatoprotection effects. Acute alcoholic liver injury (AALI) is liver damage caused by acute alcohol abuse, which can lead to severe liver lesions and even be life-threatening. Pyroptosis is inflammation-related programmed cell death characterized by membrane rupture and plays a key role in AALI. The endosomal sorting complexes required for transport (ESCRT) proteins can gather at damaged areas of the membrane to facilitate the process of sealing the membrane. In this study, we found that CAP could relieve acute alcohol-induced pyroptosis of hepatocytes in vitro and in vivo. Mechanically, we found that CAP could alleviate acute alcohol-induced pyroptosis by activating the ESCRT-III-dependent membrane repair machinery. Furthermore, the data showed that CAP induced ESCRT-III protein expression by activating transient receptor potential vanilloid member 1 (TRPV1) on the cell membrane and Ca2+ influx. TRPV1 inhibitor capsazepine (CPZ) inhibited the relief effect of CAP on acute alcohol-induced pyroptosis. Overall, these results showed that CAP might activate ESCRT-III-dependent membrane repair machinery through Ca2+ influx, which is regulated by TRPV1 calcium channels, therefore mitigating acute alcohol-induced pyroptosis. Our research provides a new perspective on a naturally active food product to promote cell repair and relieve AALI.
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Affiliation(s)
- Meitong Liu
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130012, China.
| | - Jiakang Guo
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130012, China.
| | - Jing Lu
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130012, China.
| | - Yuelin Chen
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130012, China.
| | - Xuming Deng
- State Key Laboratory for Zoonotic Diseases, Key Laboratory for Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130012, China
| | - Shengzhuo Zhang
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130012, China.
| | - Shuang Guan
- College of Food Science and Engineering, Jilin University, Changchun, Jilin 130012, China.
- State Key Laboratory for Zoonotic Diseases, Key Laboratory for Zoonosis Research, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130012, China
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Yang C, Guo W, He R, Meng X, Fu J, Lu Y. Dietary capsaicin attenuates cardiac injury after myocardial infarction in type 2 diabetic mice by inhibiting ferroptosis through activation of TRPV1 and Nrf2/HMOX1 pathway. Int Immunopharmacol 2024; 140:112852. [PMID: 39106715 DOI: 10.1016/j.intimp.2024.112852] [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: 05/09/2024] [Revised: 07/28/2024] [Accepted: 07/29/2024] [Indexed: 08/09/2024]
Abstract
BACKGROUND Type 2 diabetes mellitus (T2DM) is a major 21st-century epidemic. T2DM elevates the risk of myocardial infarction and heart failure while also reducinges survival rates. Recently Ferroptosis has been found to be involved in the development of various cardiovascular diseases. TRPV1 is also a potential therapeutic target for cardioprotection. This study explores whether capsaicin, a transient receptor potential vanilloid receptor 1 (TRPV1) agonist, can prevent diabetic myocardial infarction-induced injury by inhibiting ferroptosis. METHODS T2DM model was induced by high-fat diet (HFD) feeding combined with streptozocin (STZ) injections, and the diabetic mice were treated with capsaicin(0.015 %) in their food. Myocardial infarction model was established as well. Mouse' general characteristics, cardiac function, and morphological histology were observed and analyzed. RNA-seq was used to investigate the possible mechanism of injury in AC16 cardiomyocytes cultured with high glucose and hypoxia. In addition, the potential mechanism of capsaicin against injury was further investigated in AC16 cardiomyocytes cultured with high glucose and hypoxia. RESULTS The RNA-seq analysis revealed that ferroptosis was associated with cell death induced by high-glucose in combination with hypoxia, and CAP treatment could effectively inhibit ferroptosis to enhance cell survival. In vivo studies demonstrated that CAP treatment significantly improved post-MI cardiac function, attenuated myocardial inflammation and fibrosis. Furthermore, it was observed that CAP reduced ferroptosis levels by activating TRPV1 in the heart, upregulating Nrf2 expression, promoting Nrf2 nuclear translocation and increasing the expression of the Nrf2 downstream molecule Heme oxygenase-1 (HMOX1). CONCLUSIONS Dietary capsaicin may inhibit cardiomyocyte ferroptosis through activation of myocardial TRPV1 and Nrf2/HMOX1 signaling pathway, which in turn exerts a protective effect on the myocardium after myocardial infarction in type 2 diabetic mice.
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Affiliation(s)
- Chen Yang
- Department of Anesthesiology, the First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Wenli Guo
- Department of Anesthesiology, the First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Ruilin He
- Department of Anesthesiology, the First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Xudong Meng
- Department of Anesthesiology, the First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Jiajing Fu
- Department of Anesthesiology, the First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China
| | - Yao Lu
- Department of Anesthesiology, the First Affiliated Hospital of Anhui Medical University, Key Laboratory of Anesthesia and Perioperative Medicine of Anhui Higher Education Institutes, Anhui Medical University, Hefei 230022, China; Ambulatory Surgery Center, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.
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Qu S, Yu Z, Zhou Y, Wang S, Jia M, Chen T, Zhang X. Gut microbiota modulates neurotransmitter and gut-brain signaling. Microbiol Res 2024; 287:127858. [PMID: 39106786 DOI: 10.1016/j.micres.2024.127858] [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: 02/08/2024] [Revised: 06/16/2024] [Accepted: 07/22/2024] [Indexed: 08/09/2024]
Abstract
Neurotransmitters, including 5-hydroxytryptamine (5-HT), dopamine (DA), gamma-aminobutyric acid (GABA), and glutamate, are essential transductors in the Gut-Brain Axis (GBA), playing critical roles both peripherally and centrally. Accumulating evidence suggests that the gut microbiota modulates intestinal neurotransmitter metabolism and gut-to-brain signaling, shedding light on the crucial role of the gut microbiota in brain function and the pathogenesis of various neuropsychiatric diseases, such as major depression disorder (MDD), anxiety, addiction and Parkinson's disease (PD). Despite the exciting findings, the mechanisms underlying the modulation of neurotransmitter metabolism and function by the gut microbiota are still being elucidated. In this review, we aim to provide a comprehensive overview of the existing knowledge about the role of the gut microbiota in neurotransmitter metabolism and function in animal and clinical experiments. Moreover, we will discuss the potential mechanisms through which gut microbiota-derived neurotransmitters contribute to the pathogenesis of neuropsychiatric diseases, thus highlighting a novel therapeutic target for these conditions.
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Affiliation(s)
- Shiyan Qu
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410000, China; National Clinic Research Center for Mental Disorders, Changsha, Hunan 410000, China; National Technology Institute on Mental Disorders, Changsha, Hunan 410000, China; Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan 410000, China; Mental Health Institute, Second Xiangya Hospital, Central South University, Changsha 410000, China
| | - Zijin Yu
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410000, China; National Clinic Research Center for Mental Disorders, Changsha, Hunan 410000, China; National Technology Institute on Mental Disorders, Changsha, Hunan 410000, China; Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan 410000, China; Mental Health Institute, Second Xiangya Hospital, Central South University, Changsha 410000, China
| | - Yaxuan Zhou
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410000, China; National Clinic Research Center for Mental Disorders, Changsha, Hunan 410000, China; National Technology Institute on Mental Disorders, Changsha, Hunan 410000, China; Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan 410000, China; Mental Health Institute, Second Xiangya Hospital, Central South University, Changsha 410000, China
| | - Shiyi Wang
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410000, China; National Clinic Research Center for Mental Disorders, Changsha, Hunan 410000, China; National Technology Institute on Mental Disorders, Changsha, Hunan 410000, China; Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan 410000, China; Mental Health Institute, Second Xiangya Hospital, Central South University, Changsha 410000, China
| | - Minqi Jia
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410000, China; National Clinic Research Center for Mental Disorders, Changsha, Hunan 410000, China; National Technology Institute on Mental Disorders, Changsha, Hunan 410000, China; Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan 410000, China; Mental Health Institute, Second Xiangya Hospital, Central South University, Changsha 410000, China
| | - Ti Chen
- Clinical Laboratory, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410000, China
| | - Xiaojie Zhang
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410000, China; National Clinic Research Center for Mental Disorders, Changsha, Hunan 410000, China; National Technology Institute on Mental Disorders, Changsha, Hunan 410000, China; Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan 410000, China; Mental Health Institute, Second Xiangya Hospital, Central South University, Changsha 410000, China.
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Gorbenko AA, Heuberger JAAC, Klumpers LE, de Kam ML, Strugala PK, de Visser SJ, Groeneveld GJ. Cannabidiol Increases Psychotropic Effects and Plasma Concentrations of Δ 9-Tetrahydrocannabinol Without Improving Its Analgesic Properties. Clin Pharmacol Ther 2024. [PMID: 39054656 DOI: 10.1002/cpt.3381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 06/29/2024] [Indexed: 07/27/2024]
Abstract
Cannabidiol (CBD), the main non-intoxicating compound in cannabis, has been hypothesized to reduce the adverse effects of Δ9-tetrahydrocannabinol (THC), the main psychoactive and analgesic component of cannabis. This clinical trial investigated the hypothesis that CBD counteracts the adverse effects of THC and thereby potentially improves the tolerability of cannabis as an analgesic. A randomized, double-blind, placebo-controlled, five-way cross-over trial was performed in 37 healthy volunteers. On each visit, a double-placebo, THC 9 mg with placebo CBD, or THC 9 mg with 10, 30, or 450 mg CBD was administered orally. Psychoactive and analgesic effects were quantified using standardized test batteries. Pharmacokinetic sampling was performed. Data were analyzed using mixed-effects model. Co-administration of 450 mg CBD did not reduce, but instead significantly increased subjective, psychomotor, cognitive, and autonomous effects of THC (e.g., VAS "Feeling High" by 60.5% (95% CI: 12.7%, 128.5%, P < 0.01)), whereas THC effects with 10 and 30 mg CBD were not significantly different from THC alone. CBD did not significantly enhance THC analgesia at any dose level. Administration of 450 mg CBD significantly increased AUClast of THC (AUClast ratio: 2.18, 95% CI: 1.54, 3.08, P < 0.0001) and 11-OH-THC (AUClast ratio: 6.24, 95% CI: 4.27, 9.12, P < 0.0001) compared with THC alone, and 30 mg CBD significantly increased AUClast of 11-OH-THC (AUClast ratio: 1.89, 95% CI: 1.30, 2.77, P = 0.0013), and of THC (AUClast ratio: 1.44, 95% CI: 1.01, 2.04, P = 0.0446). Present findings do not support the use of CBD to reduce adverse effects of oral THC or enhance THC analgesia.
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Affiliation(s)
- Andriy A Gorbenko
- Centre for Human Drug Research, Leiden, The Netherlands
- Leiden University Medical Centre, Leiden, The Netherlands
| | | | - Linda E Klumpers
- Verdient Science, Denver, Colorado, USA
- Tomori Pharmacology, Denver, Colorado, USA
- Larner College of Medicine, University of Vermont, Burlington, Vermont, USA
| | | | | | - Saco J de Visser
- Centre for Future Affordable and Sustainable Therapy Development (FAST), The Hague, The Netherlands
| | - Geert J Groeneveld
- Centre for Human Drug Research, Leiden, The Netherlands
- Leiden University Medical Centre, Leiden, The Netherlands
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Xu M, Zhang D, Yan J. Targeting ferroptosis using Chinese herbal compounds to treat respiratory diseases. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 130:155738. [PMID: 38824825 DOI: 10.1016/j.phymed.2024.155738] [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: 02/01/2024] [Revised: 04/27/2024] [Accepted: 05/14/2024] [Indexed: 06/04/2024]
Abstract
BACKGROUND Respiratory diseases pose a grave threat to human life. Therefore, understanding their pathogenesis and therapeutic strategy is important. Ferroptosis is a novel type of iron-dependent programmed cell death, distinct from apoptosis, necroptosis, and autophagy, characterised by iron, reactive oxygen species, and lipid peroxide accumulation, as well as glutathione (GSH) depletion and GSH peroxidase 4 (GPX4) inactivation. A close association between ferroptosis and the onset and progression of respiratory diseases, including chronic obstructive pulmonary disease, acute lung injury, bronchial asthma, pulmonary fibrosis, and lung cancer, has been reported. Recent studies have shown that traditional Chinese medicine (TCM) compounds exhibit unique advantages in the treatment of respiratory diseases owing to their natural properties and potential efficacy. These compounds can effectively regulate ferroptosis by modulating several key signalling pathways such as system Xc- -GSH-GPX4, NCOA4-mediated ferritinophagy, Nrf2-GPX4, and Nrf2/HO-1, thus playing a positive role in improving respiratory diseases. PURPOSE This comprehensive review systematically outlines the regulatory role of ferroptosis in the onset and progression of respiratory diseases and provides evidence for treating respiratory diseases by targeting ferroptosis with TCM compounds. These insights aim to offer potential remedies for the clinical prevention and treatment of respiratory diseases. STUDY DESIGN AND METHODS We searched scientific databases PubMed, Web of Science, Scopus, and CNKI using keywords such as "ferroptosis","respiratory diseases","chronic obstructive pulmonary disease","bronchial asthma","acute lung injury","pulmonary fibrosis","lung cancer","traditional Chinese medicine","traditional Chinese medicine compound","monomer", and "natural product" to retrieve studies on the therapeutic potential of TCM compounds in ameliorating respiratory diseases by targeting ferroptosis. The retrieved data followed PRISMA criteria (preferred reporting items for systematic review). RESULTS TCM compounds possess unique advantages in treating respiratory diseases, stemming from their natural origins and proven clinical effectiveness. TCM compounds can exert therapeutic effects on respiratory diseases by regulating ferroptosis, which mainly involves modulation of pathways such as system Xc- -GSH-GPX4,NCOA4-mediated ferritinophagy, Nrf2-GPX4, and Nrf2/HO-1. CONCLUSION TCM compounds have demonstrated promising potential in improving respiratory diseases through the regulation of ferroptosis. The identification of specific TCM-related inducers and inhibitors of ferroptosis holds great significance in developing more effective strategies. However, current research remains confined to animal and cellular studies, emphasizing the imperative for further verifications through high-quality clinical data.
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Affiliation(s)
- Mengjiao Xu
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing 100102, China
| | - Di Zhang
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Jun Yan
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China.
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Hu B, Wang H, Liang H, Ma N, Wu D, Zhao R, Lv H, Xiao Z. Multiple effects of spicy flavors on neurological diseases through the intervention of TRPV1: a critical review. Crit Rev Food Sci Nutr 2024:1-20. [PMID: 39041177 DOI: 10.1080/10408398.2024.2381689] [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: 07/24/2024]
Abstract
The spicy properties of foods are contributed by various spicy flavor substances (SFs) such as capsaicin, piperine, and allicin. Beyond their distinctive sensory characteristics, SFs also influence health conditions and numerous studies have associated spicy flavors with disease treatment. In this review, we enumerate different types of SFs and describe their role in food processing, with a specific emphasis on critically examining their influence on human wellness. Particularly, detailed insights into the mechanisms through which SFs enhance physiological balance and alleviate neurological diseases are provided, and a systematic analysis of the significance of transient receptor potential vanilloid type-1 (TRPV1) in regulating metabolism and nervous system homeostasis is presented. Moreover, enhancing the accessibility and utilization of SFs can potentially amplify the physiological effects. This review aims to provide compelling evidence for the integration of food flavor and human health.
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Affiliation(s)
- Boyong Hu
- Department of Food Science & Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Heng Wang
- Department of Food Science & Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Hong Liang
- Department of Food Science & Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Ning Ma
- Department of Food Science & Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Diyi Wu
- Department of Food Science & Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Ruotong Zhao
- Department of Food Science & Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Haoming Lv
- Department of Food Science & Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Zuobing Xiao
- Department of Food Science & Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
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Gianibbi B, Visibelli A, Spinsanti G, Spiga O. Three-Dimensional Quantitative Structure-Activity Relationship Study of Transient Receptor Potential Vanilloid 1 Channel Antagonists Reveals Potential for Drug Design Purposes. Int J Mol Sci 2024; 25:7951. [PMID: 39063195 PMCID: PMC11276937 DOI: 10.3390/ijms25147951] [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: 06/30/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 07/28/2024] Open
Abstract
Transient receptor potential vanilloid 1 (TRPV1) was reported to be a putative target for recovery from chronic pain, producing analgesic effects after its inhibition. A series of drug candidates were previously developed, without the ability to ameliorate the therapeutic outcome. Starting from previously designed compounds, derived from the hybridization of antagonist SB-705498 and partial agonist MDR-652, we performed a virtual screening on a pharmacophore model built by exploiting the Cryo-EM 3D structure of a nanomolar antagonist in complex with the human TRPV1 channel. The pharmacophore model was described by three pharmacophoric features, taking advantage of both the bioactive pose of the antagonist and the receptor exclusion spheres. The results of the screening were implemented inside a 3D-QSAR model, correlating with the negative decadic logarithm of the inhibition rate of the ligands. After the validation of the obtained 3D-QSAR model, we designed a new series of compounds by introducing key modifications on the original scaffold. Again, we determined the compounds' binding poses after alignment to the pharmacophoric model, and we predicted their inhibition rates with the validated 3D-QSAR model. The obtained values resulted in being even more promising than parent compounds, demonstrating that ongoing research still leaves much room for improvement.
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Affiliation(s)
- Beatrice Gianibbi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy; (B.G.); (A.V.); (G.S.)
| | - Anna Visibelli
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy; (B.G.); (A.V.); (G.S.)
| | - Giacomo Spinsanti
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy; (B.G.); (A.V.); (G.S.)
- Centro della Scienza e della Tecnica, Polo Universitario Grossetano, Via Ginori 41, 58100 Grosseto, Italy
| | - Ottavia Spiga
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, 53100 Siena, Italy; (B.G.); (A.V.); (G.S.)
- Centro della Scienza e della Tecnica, Polo Universitario Grossetano, Via Ginori 41, 58100 Grosseto, Italy
- Competence Center ARTES 4.0, 53100 Siena, Italy
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Puthumana EA, Muhamad L, Young LA, Chu XP. TRPA1, TRPV1, and Caffeine: Pain and Analgesia. Int J Mol Sci 2024; 25:7903. [PMID: 39063144 PMCID: PMC11276833 DOI: 10.3390/ijms25147903] [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: 05/20/2024] [Revised: 06/27/2024] [Accepted: 07/05/2024] [Indexed: 07/28/2024] Open
Abstract
Caffeine (1,3,7-trimethylxanthine) is a naturally occurring methylxanthine that acts as a potent central nervous system stimulant found in more than 60 different plants and fruits. Although caffeinated beverages are widely and casually consumed, the application of caffeine beyond dietary levels as pharmacologic therapy has been recognized since the beginning of its recorded use. The analgesic and vasoactive properties of caffeine are well known, but the extent of their molecular basis remains an area of active research. There is existing evidence in the literature as to caffeine's effect on TRP channels, the role of caffeine in pain management and analgesia, as well as the role of TRP in pain and analgesia; however, there has yet to be a review focused on the interaction between caffeine and TRP channels. Although the influence of caffeine on TRP has been demonstrated in the lab and in animal models, there is a scarcity of data collected on a large scale as to the clinical utility of caffeine as a regulator of TRP. This review aims to prompt further molecular research to elucidate the specific ligand-host interaction between caffeine and TRP by validating caffeine as a regulator of transient receptor potential (TRP) channels-focusing on the transient receptor potential vanilloid 1 (TRPV1) receptor and transient receptor potential ankyrin 1 (TRPA1) receptor subtypes-and its application in areas of pain.
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Affiliation(s)
| | | | | | - Xiang-Ping Chu
- Departments of Biomedical Sciences, School of Medicine, University of Missouri-Kansas City, Kansas City, MO 64108, USA; (E.A.P.); (L.M.); (L.A.Y.)
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Cook JB, Piatt R, Burgard E, Thor KB, Marson L. Rapid-Onset, Short-Duration Induction of Colorectal Contractions in Anesthetized, Adult, Male Rats. J Pharmacol Exp Ther 2024; 390:196-202. [PMID: 38719479 PMCID: PMC11264250 DOI: 10.1124/jpet.123.001989] [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: 12/13/2023] [Accepted: 04/19/2024] [Indexed: 07/20/2024] Open
Abstract
Substantial clinical and preclinical evidence indicates that transient receptor potential vanilloid 1 (TRPV1) receptors are expressed on terminals of colorectal chemoreceptors and mechanoreceptors and are involved in various rectal hypersensitivity disorders with common features of colorectal overactivity. These stimulatory properties of TRPV1 receptors on colorectal function suggested that brief stimulation of TRPV1 might provide a means of pharmacologically activating the colorectum to induce defecation in patients with an "unresponsive" colorectum. The current studies explored the basic features of TRPV1 receptor-induced contractions of the colorectum in anesthetized rats with and without acute spinal cord injury (aSCI). Cumulative concentration-response curves to intrarectal (IR) capsaicin (CAP) solutions (0.003%-3.0%) were performed in anesthetized aSCI and spinal intact rats. CAP produced an "inverted U," cumulative concentration-response curve with a threshold for inducing colorectal contractions at 0.01% and a peak response at 0.1% and slight decreases in responses up to 3%. Decreases in responses with concentrations >0.1% are due to a rapid desensitization (i.e., ≤30 minutes) of TRPV1 receptors to each successive dose. Desensitization appeared fully recovered within 24 hours in spinal intact rats. Colorectal contractions were completely blocked by atropine, indicating a reflexogenic activation of parasympathetic neurons, and responses were completely unaffected by a neurokinin 2 receptor antagonist, indicating that release of neurokinin A from afferent terminals and subsequent direct contractions of the smooth muscle was not involved. IR administration of three other TRPV1 receptor agonists produced similar results as CAP. SIGNIFICANCE STATEMENT: Individuals with spinal cord injury often lose control of defecation. Time-consuming bowel programs using digital stimulation of the rectum are used to empty the bowel. This study shows that intrarectal administration of the transient receptor potential vanilloid 1 (TRPV1) receptor agonist, capsaicin, can induce rapid-onset, short-duration colorectal contractions capable of inducing defecation in spinal cord injured and intact rats. Therefore, TRPV1 agonists show promise as potential therapeutics to induce defecation in individuals with neurogenic bowel.
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Affiliation(s)
- Jason B Cook
- Dignify Therapeutics LLC, Research Triangle Park, North Carolina
| | - Raymond Piatt
- Dignify Therapeutics LLC, Research Triangle Park, North Carolina
| | - Edward Burgard
- Dignify Therapeutics LLC, Research Triangle Park, North Carolina
| | - Karl B Thor
- Dignify Therapeutics LLC, Research Triangle Park, North Carolina
| | - Lesley Marson
- Dignify Therapeutics LLC, Research Triangle Park, North Carolina
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11
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Chiodi D, Ishihara Y. The role of the methoxy group in approved drugs. Eur J Med Chem 2024; 273:116364. [PMID: 38781921 DOI: 10.1016/j.ejmech.2024.116364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/12/2024] [Accepted: 03/23/2024] [Indexed: 05/25/2024]
Abstract
The methoxy substituent is prevalent in natural products and, consequently, is present in many natural product-derived drugs. It has also been installed in modern drug molecules with no remnant of natural product features because medicinal chemists have been taking advantage of the benefits that this small functional group can bestow on ligand-target binding, physicochemical properties, and ADME parameters. Herein, over 230 methoxy-containing small-molecule drugs, as well as several fluoromethoxy-containing drugs, are presented from the vantage point of the methoxy group. Biochemical mechanisms of action, medicinal chemistry SAR studies, and numerous X-ray cocrystal structures are analyzed to identify the precise role of the methoxy group for many of the drugs and drug classes. Although the methoxy substituent can be considered as the hybridization of a hydroxy and a methyl group, the combination of these functionalities often results in unique effects that can amount to more than the sum of the individual parts.
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Affiliation(s)
- Debora Chiodi
- Department of Chemistry, Takeda Pharmaceuticals, 9625 Towne Centre Drive, San Diego, CA, 92121, USA
| | - Yoshihiro Ishihara
- Department of Chemistry, Vividion Therapeutics, 5820 Nancy Ridge Drive, San Diego, CA, 92121, USA.
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12
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Buzza AS, Cousins H, Tapas KE, Anders JJ, Lewis SJ, Jenkins MW, Moffitt MA. Direct Photobiomodulation Therapy on the Sciatic Nerve Significantly Attenuates Acute Nociceptive Sensitivity Without Affecting Motor Output. Neuromodulation 2024:S1094-7159(24)00113-2. [PMID: 38958630 DOI: 10.1016/j.neurom.2024.04.011] [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: 01/20/2024] [Revised: 04/14/2024] [Accepted: 04/30/2024] [Indexed: 07/04/2024]
Abstract
OBJECTIVES Pharmacologic pain treatments lack specific targeting and often produce unwanted side effects (eg, addiction, additional hyperalgesia). We previously established that the direct application of laser irradiation (direct photobiomodulation [PBM]) of the sural nerve reduces thermal hypersensitivity in a rodent model of chronic pain, but not mechanical hypersensitivity. These observations were consistent with a selective reduction in the small-diameter fiber contribution to electrophysiologically measured evoked response after direct PBM of a sensory nerve (saphenous). However, to our knowledge, direct application of laser irradiation has never been performed in an animal model of acute nociceptive pain or on a mixed nerve in which sensory and motor outcomes can be observed. MATERIALS AND METHODS In this study, we describe the effects of direct application of laser irradiation (808 nm, 60 mW, 4 minutes) on a mixed nerve (sciatic nerve) in an acute nociceptive pain model (intradermal capsaicin injection) in rats over the course of two weeks. To investigate whether laser irradiation of a mixed nerve alters motor function, in separate experiments, we applied laser irradiation to the sciatic nerve (using the same parameters as in the chronic pain experiments), and force generation of the gastrocnemius was measured. RESULTS Capsaicin-induced hypersensitivities to mechanical (pin prick) and thermal (Hargreaves) noxious stimuli, associated with Aδ- and C-fibers, showed a maximal reduction of 70% and 56.2%, respectively, by direct PBM, when compared with a control group (vehicle injection, no PBM) on the same day. This reduction was determined to be significant using a mixed-design analysis of variance with a p value < 0.05. Force generation remained unchanged for up to 120 minutes after laser irradiation. In summary, direct PBM selectively inhibits C- and Aδ-fiber transmission while leaving Aɑ-, Aβ-, and motor-fiber activity intact. CONCLUSIONS These results, in conjunction with our previous analyses of laser irradiation effects on the sural nerve in a chronic spared nerve injury pain model, suggest that direct PBM is a promising candidate for treating pain induced by small-diameter fiber activity.
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Affiliation(s)
- Andrew S Buzza
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Hannah Cousins
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Kalista E Tapas
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Juanita J Anders
- Department of Anatomy, Physiology, and Genetics, Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - Stephen J Lewis
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, USA; Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - Michael W Jenkins
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA; Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA
| | - Michael A Moffitt
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA.
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13
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MO X, CHEN Y, YIN Q, CHEN H, BAN Q, LI J, CHEN S, YAO J. Transient receptor potential vanilloid 1 involved in the analgesic effects of total flavonoids extracted from Longxuejie (). J TRADIT CHIN MED 2024; 44:437-447. [PMID: 38767627 PMCID: PMC11077159 DOI: 10.19852/j.cnki.jtcm.20240423.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 07/06/2023] [Indexed: 05/22/2024]
Abstract
OBJECTIVE To evaluate the analgesic effects of total flavonoids of Longxuejie (Resina Dracaenae Cochinchinensis) (TFDB) and explore the possible analgesic mechanism associated with transient receptor potential vanilloid 1 (TRPV1). METHODS Whole-cell patch clamp technique was used to observe the effects of TFDB on capsaicin-induced TRPV1 currents. Rat experiments in vivo were used to observe the analgesic effects of TFDB. Western blot and immunofluorescence experiments were used to test the change of TRPV1 expression in DRG neurons induced by TFDB. RESULTS Results showed that TFDB inhibited capsaicin-induced TRPV1 receptor currents in acutely isolated dorsal root ganglion (DRG) neurons of rats and the half inhibitory concentration was (16.7 ± 1.6) mg/L. TFDB (2-20 mg/kg) showed analgesic activity in the phase Ⅱ of formalin test and (0.02-2 mg per paw) reduced capsaicin-induced licking times of rats. TFDB (20 mg/kg) was fully efficacious on complete Freund's adjuvant (CFA)-induced inflammatory thermal hyperalgesia and capsaicin could weaken the analgesic effects. The level of TRPV1 expressions of DRG neurons was also decreased in TFDB-treated CFA-inflammatory pain rats. CONCLUSION All these results indicated that the analgesic effect of TFDB may contribute to their modulations on both function and expression of TRPV1 channels in DRG neurons.
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Affiliation(s)
- Xiaoqiang MO
- 1 Department of Stomatology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, China
- 2 College of General Practitioners, Youjiang Medical University for Nationalities, Baise 533000, China
| | - Yating CHEN
- 3 College of Biomedical Engineering, South-Central Minzu University, Key Laboratory of Cognitive Science of State Ethnic Affairs Commission, Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis and Treatment, Wuhan 430074, China
| | - Qian YIN
- 3 College of Biomedical Engineering, South-Central Minzu University, Key Laboratory of Cognitive Science of State Ethnic Affairs Commission, Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis and Treatment, Wuhan 430074, China
| | - Haibo CHEN
- 1 Department of Stomatology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, China
| | - Qiang BAN
- 1 Department of Stomatology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, China
| | - Jun LI
- 4 College of Pharmacy, South-Central Minzu University, Wuhan 430074, China
| | - Su CHEN
- 3 College of Biomedical Engineering, South-Central Minzu University, Key Laboratory of Cognitive Science of State Ethnic Affairs Commission, Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis and Treatment, Wuhan 430074, China
| | - Jinguang YAO
- 1 Department of Stomatology, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, China
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14
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Ramos-Lopez O, Martinez-Aceviz Y, Sobrevilla-Navarro AA, Chavez-Mendez JR. Genetic Influence on Capsaicin Tolerance: Precision Nutrition Implications for Obesity Handling. Lifestyle Genom 2024; 17:57-63. [PMID: 38810602 DOI: 10.1159/000539293] [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: 04/08/2024] [Accepted: 05/06/2024] [Indexed: 05/31/2024] Open
Abstract
INTRODUCTION It has been suggested that capsaicin (CAP), a major pungent component in chili peppers, can be used as an anti-obesity ingredient due to effects on energy metabolism, but evidence is not consistent. Genetics may account for differences in CAP tolerance and its impact on adiposity status. The aim of this study was to systematically review current evidence concerning the role of genetic polymorphisms influencing CAP tolerance. METHODS The present systematic review analyzed and synthesized available evidence concerning associations between genetic polymorphisms and CAP tolerance following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols (PRISMA-P) guidelines. Databases such as PubMed/MEDLINE, Cochrane, Scopus, Google Scholar, SciELO, and LILACS were screened. Out of 228 publications identified, only 6 meet inclusion criteria and were finally included in the final report. RESULTS Overall, a total of 28 single nucleotide polymorphisms were associated with several CAP tolerance traits including sensitivity to burning/stinging, heat pain, and cough reactions, and detection of bitter taste thresholds. These genetic variants were located within 6 genes involved in key physiological processes such synthesis of tetrahydrobiopterin and nitric oxide production (GCH1), CAP uptake and transduction of thermal stimuli (TRPV1), and bitter taste perception (TAS2R38, TAS2R3, TAS2R4, and TAS2R5). CONCLUSION There is evidence about the influence of genetic polymorphisms on CAP tolerance by affecting nociceptive signaling, CAP binding, and bitter tasting. This knowledge may facilitate the design and implementation of innovative CAP-based nutrigenetic strategies for a more precise clinical management of obesity.
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Affiliation(s)
- Omar Ramos-Lopez
- Medicine and Psychology School, Autonomous University of Baja California, Tijuana, Mexico
| | | | - Ana Alondra Sobrevilla-Navarro
- Medicine and Psychology School, Autonomous University of Baja California, Tijuana, Mexico
- Department of Biomedical Sciences, University Center of Tonalá, University of Guadalajara, Guadalajara, Mexico
| | - Jose Roman Chavez-Mendez
- Health Sciences School "Valle de las Palmas", Autonomous University of Baja California, Tijuana, Mexico
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15
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Hanifa M, Suri M, Singh H, Gagnani R, Jaggi AS, Bali A. Dual Role of TRPV1 Channels in Cerebral Stroke: An Exploration from a Mechanistic and Therapeutic Perspective. Mol Neurobiol 2024:10.1007/s12035-024-04221-5. [PMID: 38760620 DOI: 10.1007/s12035-024-04221-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 05/05/2024] [Indexed: 05/19/2024]
Abstract
Transient receptor potential vanilloid subfamily member 1 (TRPV1) has been strongly implicated in the pathophysiology of cerebral stroke. However, the exact role and mechanism remain elusive. TPRV1 channels are exclusively present in the neurovascular system and involve many neuronal processes. Numerous experimental investigations have demonstrated that TRPV1 channel blockers or the lack of TRPV1 channels may prevent harmful inflammatory responses during ischemia-reperfusion injury, hence conferring neuroprotection. However, TRPV1 agonists such as capsaicin and some other non-specific TRPV1 activators may induce transient/slight degree of TRPV1 channel activation to confer neuroprotection through a variety of mechanisms, including hypothermia induction, improving vascular functions, inducing autophagy, preventing neuronal death, improving memory deficits, and inhibiting inflammation. Another factor in capsaicin-mediated neuroprotection could be the desensitization of TRPV1 channels. Based on the summarized evidence, it may be plausible to suggest that TPRV1 channels have a dual role in ischemia-reperfusion-induced cerebral injury, and thus, both agonists and antagonists may produce neuroprotection depending upon the dose and duration. The current review summarizes the dual function of TRPV1 in ischemia-reperfusion-induced cerebral injury models, explains its mechanism, and predicts the future.
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Affiliation(s)
- Mohd Hanifa
- Department of Pharmacology, Central University of Punjab, Bathinda, 151401, India
| | - Manisha Suri
- Department of Pharmacology, Central University of Punjab, Bathinda, 151401, India
| | - Harshita Singh
- Department of Pharmacology, Central University of Punjab, Bathinda, 151401, India
| | - Riya Gagnani
- Department of Pharmacology, Central University of Punjab, Bathinda, 151401, India
| | | | - Anjana Bali
- Department of Pharmacology, Central University of Punjab, Bathinda, 151401, India.
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16
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Branković M, Gmizić T, Dukić M, Zdravković M, Daskalović B, Mrda D, Nikolić N, Brajković M, Gojgić M, Lalatović J, Kralj Đ, Pantić I, Vojnović M, Milovanović T, Đurašević S, Todorović Z. Therapeutic Potential of Palmitoylethanolamide in Gastrointestinal Disorders. Antioxidants (Basel) 2024; 13:600. [PMID: 38790705 PMCID: PMC11117950 DOI: 10.3390/antiox13050600] [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: 02/29/2024] [Revised: 05/02/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024] Open
Abstract
Palmitoylethanolamide (PEA) is an endocannabinoid-like bioactive lipid mediator belonging to the family of N-acylethanolamines, most abundantly found in peanuts and egg yolk. When the gastrointestinal (GI) effects of PEA are discussed, it must be pointed out that it affects intestinal motility but also modulates gut microbiota. This is due to anti-inflammatory, antioxidant, analgesic, antimicrobial, and immunomodulatory features. Additionally, PEA has shown beneficial effects in several GI diseases, particularly irritable bowel syndrome and inflammatory bowel diseases, as various studies have shown, and it is important to emphasize its relative lack of toxicity, even at high dosages. Unfortunately, there is not enough endogenous PEA to treat disturbed gut homeostasis, even though it is produced in the GI tract in response to inflammatory stimuli, so exogenous intake is mandatory to achieve homeostasis. Intake of PEA could be through animal and/or vegetable food, but bearing in mind that a high dosage is needed to achieve a therapeutic effect, it must be compensated through dietary supplements. There are still open questions pending to be answered, so further studies investigating PEA's effects and mechanisms of action, especially in humans, are crucial to implementing PEA in everyday clinical practice.
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Affiliation(s)
- Marija Branković
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia;
| | - Tijana Gmizić
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
| | - Marija Dukić
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
| | - Marija Zdravković
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia;
| | | | - Davor Mrda
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
| | - Novica Nikolić
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
| | - Milica Brajković
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia;
| | - Milan Gojgić
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
| | - Jovana Lalatović
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
| | - Đorđe Kralj
- University Hospital Medical Center Zvezdara, 11000 Belgrade, Serbia;
| | - Ivana Pantić
- Clinic of Gastroenterology and Hepatology, University Clinical Center of Serbia, 11000 Belgrade, Serbia; (I.P.); (M.V.)
| | - Marko Vojnović
- Clinic of Gastroenterology and Hepatology, University Clinical Center of Serbia, 11000 Belgrade, Serbia; (I.P.); (M.V.)
| | - Tamara Milovanović
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia;
- Clinic of Gastroenterology and Hepatology, University Clinical Center of Serbia, 11000 Belgrade, Serbia; (I.P.); (M.V.)
| | - Siniša Đurašević
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry Ivan Đaja, Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia;
| | - Zoran Todorović
- University Hospital Medical Center Bežanijska Kosa, 11000 Belgrade, Serbia; (T.G.); (M.D.); (M.Z.); (D.M.); (N.N.); (M.B.); (J.L.); (Z.T.)
- Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia;
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Park CK, Go EJ, Jo H, Hwang SM, Rahman MM, Park J, Lee JY, Jo YY, Jung Y, Berta T, Kim YH. GLP-1 and Its Derived Peptides Mediate Pain Relief Through Direct TRPV1 Inhibition Without Affecting Thermoregulation. RESEARCH SQUARE 2024:rs.3.rs-4233732. [PMID: 38798444 PMCID: PMC11118710 DOI: 10.21203/rs.3.rs-4233732/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Hormonal regulation during food ingestion and its association with pain prompted the investigation of the impact of glucagon-like peptide-1 (GLP-1) on the transient receptor potential vanilloid 1 (TRPV1). Both endogenous and synthetic GLP-1 and an antagonist of GLP-1, exendin 9-39, reduced heat sensitivity in naïve mice. GLP-1-derived peptides (liraglutide, exendin-4, and exendin 9-39) effectively inhibited capsaicin (CAP)-induced currents and calcium responses in cultured sensory neurons and TRPV1-expressing cell lines. Notably, the exendin 9-39 alleviated CAP-induced acute pain, as well as chronic pain induced by complete Freund's adjuvant (CFA) and spared nerve injury (SNI) in mice, without causing hyperthermia associated with other TRPV1 inhibitors. Electrophysiological analyses revealed that exendin 9-39 binds to the extracellular side of TRPV1, functioning as a noncompetitive inhibitor of CAP. Exendin 9-39 did not affect proton-induced TRPV1 activation, suggesting its selective antagonism. Among exendin 9-39 fragments, exendin 20-29 specifically binds to TRPV1, alleviating pain in both acute and chronic pain models without interfering with GLP-1R function. Our study revealed a novel role for GLP-1 and its derivatives in pain relief, proposing exendin 20-29 as a promising therapeutic candidate.
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Wu Y, Wang X, Zhang J, Du S, Wang Z, Li J, Zhang W, Xiang J, Li R, Liu J, Bi X. Capsaicin combined with stem cells improved mitochondrial dysfunction in PIG3V cells, an immortalized human vitiligo melanocyte cell line, by inhibiting the HSP70/TLR4/mTOR/FAK signaling axis. Mol Biol Rep 2024; 51:650. [PMID: 38734811 DOI: 10.1007/s11033-024-09592-5] [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: 02/29/2024] [Accepted: 04/29/2024] [Indexed: 05/13/2024]
Abstract
BACKGROUND Vitiligo is a common autoimmune skin disease. Capsaicin has been found to exert a positive effect on vitiligo treatment, and mesenchymal stem cells (MSCs) are also confirmed to be an ideal cell type. This study aimed to explore the influence of capsaicin combined with stem cells on the treatment of vitiligo and to confirm the molecular mechanism of capsaicin combined with stem cells in treating vitiligo. METHODS AND RESULTS PIG3V cell proliferation and apoptosis were detected using CCK-8 and TUNEL assays, MitoSOX Red fluorescence staining was used to measure the mitochondrial ROS level, and JC-1 staining was used to detect the mitochondrial membrane potential. The expression of related genes and proteins was detected using RT‒qPCR and Western blotting. Coimmunoprecipitation was used to analyze the protein interactions between HSP70 and TLR4 or between TLR4 and mTOR. The results showed higher expression of HSP70 in PIG3V cells than in PIG1 cells. The overexpression of HSP70 reduced the proliferation of PIG3V cells, promoted apoptosis, and aggravated mitochondrial dysfunction and autophagy abnormalities. The expression of HSP70 could be inhibited by capsaicin combined with MSCs, which increased the levels of Tyr, Tyrp1 and DCT, promoted the proliferation of PIG3V cells, inhibited apoptosis, activated autophagy, and improved mitochondrial dysfunction. In addition, capsaicin combined with MSCs regulated the expression of TLR4 through HSP70 and subsequently affected the mTOR/FAK signaling pathway CONCLUSIONS: Capsaicin combined with MSCs inhibits TLR4 through HSP70, and the mTOR/FAK signaling pathway is inhibited to alleviate mitochondrial dysfunction and autophagy abnormalities in PIG3V cells.
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Affiliation(s)
- Yifei Wu
- Department of Dermatology, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Kunming, Yunnan, 650032, China
| | - Xiaochuan Wang
- Department of Dermatology, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Kunming, Yunnan, 650032, China
| | - Jiayu Zhang
- Department of Dermatology, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Kunming, Yunnan, 650032, China
| | - Sha Du
- Department of Laboratory, The First People's Hospital of Yunnan Province, Kunming, Yunnan, 650032, China
| | - Zhiqiong Wang
- Department of Dermatology, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Kunming, Yunnan, 650032, China
| | - Jinrong Li
- Department of Dermatology, Traditional Chinese Medicine Hospital of Jinggu County, Pu'er, Yunnan, 666400, China
| | - Wenhe Zhang
- Department of Dermatology, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Kunming, Yunnan, 650032, China
| | - Jie Xiang
- Department of Dermatology, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Kunming, Yunnan, 650032, China
| | - Renfu Li
- Department of Dermatology, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Kunming, Yunnan, 650032, China
| | - Jing Liu
- Department of Dermatology, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Kunming, Yunnan, 650032, China
| | - Xin Bi
- Department of Dermatology, The First People's Hospital of Yunnan Province, No. 157 Jinbi Road, Kunming, Yunnan, 650032, China.
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Gou R, Liu Y, Gou L, Mi S, Li X, Yang Y, Cheng X, Zhang Y. Transient Receptor Potential Channels in Sensory Mechanisms of the Lower Urinary Tract. Urol Int 2024:1-13. [PMID: 38657590 DOI: 10.1159/000538855] [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: 10/10/2023] [Accepted: 04/03/2024] [Indexed: 04/26/2024]
Abstract
BACKGROUND Urine storage and excretion require a network of interactions in the urinary tract and the central nervous system, which is mediated by a reservoir of water in the bladder and the outlet to the bladder neck, urethra, and external urethral sphincter. Through communicating and coordinating each other, micturition system eventually showed a switch-like activity pattern. SUMMARY At cervicothoracic and lumbosacral spine, the spinal reflex pathway of the lower urinary tract (LUT) received mechanosensory input from the urothelium to regulate the bladder contraction activity, thereby controlled urination voluntarily. Impairment of above-mentioned any level could result in lower urinary tract dysfunction, placed a huge burden on patients and society. Specific expression of purinergic receptors and transient receptor potential (TRP) channels are thought to play an important role in urinary excretion in the LUT. KEY MESSAGES This article reviewed the knowledge about the voiding reflex and described the role and function of TRP channels during voiding.
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Affiliation(s)
- Ruiqiang Gou
- The First Clinical Medical College, Lanzhou University, Lanzhou, China,
| | - Yuanyuan Liu
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Li Gou
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Shengyan Mi
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Xiaonan Li
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Yichen Yang
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Xiaorong Cheng
- The Second Hospital and Clinical Medical School, Lanzhou University, Lanzhou, China
| | - Yibao Zhang
- The Second Hospital and Clinical Medical School, Lanzhou University, Lanzhou, China
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20
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Yan YF, Feng Y, Wang SM, Fang F, Chen HY, Zhen MX, Ji YQ, Wu SD. Potential actions of capsaicin for preventing vascular calcification of vascular smooth muscle cells in vitro and in vivo. Heliyon 2024; 10:e28021. [PMID: 38524547 PMCID: PMC10958412 DOI: 10.1016/j.heliyon.2024.e28021] [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: 07/30/2023] [Revised: 03/09/2024] [Accepted: 03/11/2024] [Indexed: 03/26/2024] Open
Abstract
Vascular calcification (VC) is an accurate risk factor and predictor of adverse cardiovascular events; however, there is currently no effective therapy to specifically prevent VC progression. Capsaicin (Cap) is a bioactive alkaloid isolated from Capsicum annuum L., a traditional medicinal and edible plant that is beneficial for preventing cardiovascular diseases. However, the effect of Cap on VC remains unclear. This study aimed to explore the effects and related mechanisms of Cap on aortic calcification in a mouse and on Pi-induced calcification in vascular smooth muscle cells (VSMCs). First, we established a calcification mouse model with vitamin D3 and evaluated the effects of Cap on calcification mice using von Kossa staining, calcium content, and alkaline phosphatase activity tests. The results showed that Cap significantly improved calcification in mice. VSMCs were then cultured in 2.6 mM Na2HPO4 and 50 μg/mL ascorbic acid for 7 days to obtain a calcification model, and we investigated the effects and mechanisms of Cap on VSMCs calcification by assessing the changes of calcium deposition, calcium content, and subsequent VC biomarkers. These results showed that Cap alleviated VSMCs calcification by upregulating the expressions of TRPV1. Moreover, Cap reduced the expression of Wnt3a and β-catenin, whereas DKK1 antagonised the inhibitory effect of Cap on VSMC calcification. This study is the first to offer direct evidence that Cap inhibits the Wnt/β-catenin signaling pathway by upregulating the expression of the TRPV1 receptor, resulting in the decreased expression of Runx2 and BMP-2, thereby reducing VSMC calcification. Our study may provide novel strategies for preventing the progression of VC. This could serve as a theoretical basis for clinically treating VC with spicy foods.
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Affiliation(s)
- Yin-Fang Yan
- Department of Central Laboratory, The First Affiliated Hospital of Northwestern University, The First Hospital of Xi'an, Xi'an, 710069, Shaanxi Province, China
- Xi'an Key Laboratory for Innovation and Translation of Neuroimmunological Diseases, Xi'an, Shaanxi Province, China
| | - Yue Feng
- Department of Central Laboratory, The First Affiliated Hospital of Northwestern University, The First Hospital of Xi'an, Xi'an, 710069, Shaanxi Province, China
- Xi'an Key Laboratory for Innovation and Translation of Neuroimmunological Diseases, Xi'an, Shaanxi Province, China
| | - Si-Min Wang
- Department of Central Laboratory, The First Affiliated Hospital of Northwestern University, The First Hospital of Xi'an, Xi'an, 710069, Shaanxi Province, China
- Xi'an Key Laboratory for Innovation and Translation of Neuroimmunological Diseases, Xi'an, Shaanxi Province, China
| | - Fei Fang
- Department of Central Laboratory, The First Affiliated Hospital of Northwestern University, The First Hospital of Xi'an, Xi'an, 710069, Shaanxi Province, China
- Xi'an Key Laboratory for Innovation and Translation of Neuroimmunological Diseases, Xi'an, Shaanxi Province, China
| | - Hong-Yan Chen
- Department of Central Laboratory, The First Affiliated Hospital of Northwestern University, The First Hospital of Xi'an, Xi'an, 710069, Shaanxi Province, China
- Xi'an Key Laboratory for Innovation and Translation of Neuroimmunological Diseases, Xi'an, Shaanxi Province, China
| | - Ming-Xia Zhen
- Department of Central Laboratory, The First Affiliated Hospital of Northwestern University, The First Hospital of Xi'an, Xi'an, 710069, Shaanxi Province, China
- Xi'an Key Laboratory for Innovation and Translation of Neuroimmunological Diseases, Xi'an, Shaanxi Province, China
| | - Yu-Qiang Ji
- Department of Central Laboratory, The First Affiliated Hospital of Northwestern University, The First Hospital of Xi'an, Xi'an, 710069, Shaanxi Province, China
- Xi'an Key Laboratory for Innovation and Translation of Neuroimmunological Diseases, Xi'an, Shaanxi Province, China
| | - Song-Di Wu
- Department of Central Laboratory, The First Affiliated Hospital of Northwestern University, The First Hospital of Xi'an, Xi'an, 710069, Shaanxi Province, China
- Xi'an Key Laboratory for Innovation and Translation of Neuroimmunological Diseases, Xi'an, Shaanxi Province, China
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21
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Herb M. NADPH Oxidase 3: Beyond the Inner Ear. Antioxidants (Basel) 2024; 13:219. [PMID: 38397817 PMCID: PMC10886416 DOI: 10.3390/antiox13020219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/02/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Reactive oxygen species (ROS) were formerly known as mere byproducts of metabolism with damaging effects on cellular structures. The discovery and description of NADPH oxidases (Nox) as a whole enzyme family that only produce this harmful group of molecules was surprising. After intensive research, seven Nox isoforms were discovered, described and extensively studied. Among them, the NADPH oxidase 3 is the perhaps most underrated Nox isoform, since it was firstly discovered in the inner ear. This stigma of Nox3 as "being only expressed in the inner ear" was also used by me several times. Therefore, the question arose whether this sentence is still valid or even usable. To this end, this review solely focuses on Nox3 and summarizes its discovery, the structural components, the activating and regulating factors, the expression in cells, tissues and organs, as well as the beneficial and detrimental effects of Nox3-mediated ROS production on body functions. Furthermore, the involvement of Nox3-derived ROS in diseases progression and, accordingly, as a potential target for disease treatment, will be discussed.
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Affiliation(s)
- Marc Herb
- Institute for Medical Microbiology, Immunology and Hygiene, Faculty of Medicine, University Hospital Cologne, University of Cologne, 50935 Cologne, Germany;
- German Centre for Infection Research, Partner Site Bonn-Cologne, 50931 Cologne, Germany
- Cologne Cluster of Excellence on Cellular Stress Responses in Aging-Associated Diseases (CECAD), 50931 Cologne, Germany
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22
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Stubbs JJ, McCallum R. Cannabinoid hyperemesis syndrome: prevalence and management in an era of cannabis legalization. J Investig Med 2024; 72:171-177. [PMID: 37997432 DOI: 10.1177/10815589231217495] [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: 11/25/2023]
Abstract
As more states legalize cannabinoid products for recreational use and medicinal purposes, the prevalence of cannabinoid hyperemesis syndrome has become increasingly common. Yet, it remains unrecognized to many healthcare providers along with the most efficacious treatments. Cannabinoid hyperemesis syndrome most often presents with episodic vomiting secondary to chronic daily cannabis use over several months to years. Patients often complain of nausea and abdominal pain that is improved by taking hot showers or baths. Symptoms are alleviated with the cessation of cannabis use over a period of 6-12 months. Treatment for acute attacks often consists of parenteral benzodiazepines in the inpatient setting. Long-term management and prevention of further attacks are aided by tricyclic antidepressants such as amitriptyline with a dose range of 50-200 mg/d. Once a patient is in remission, amitriptyline can be tapered slowly. As cannabis becomes more widely available and accepted in the continental United States, so must education on the diagnosis of cannabinoid hyperemesis syndrome and treatment strategies.
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Affiliation(s)
- Justin Joe Stubbs
- Texas Tech University Health Sciences Center El Paso, El Paso, TX, USA
| | - Richard McCallum
- Texas Tech University Health Sciences Center El Paso, El Paso, TX, USA
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23
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Ren H, Zhou J, Fu H, Feng Q, Wang J, Li C, Xia G, Shang W, He Y. Identification and virtual screening of novel salty peptides from hydrolysate of tilapia by-product by batch molecular docking. Front Nutr 2024; 10:1343209. [PMID: 38260067 PMCID: PMC10800615 DOI: 10.3389/fnut.2023.1343209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 12/19/2023] [Indexed: 01/24/2024] Open
Abstract
Introduction Tilapia produces a large number of by-products during processing, which contain potentially flavorful peptides. Methods The application of PyRx software enabled batch molecular docking andscreening of 16 potential salty peptides from 189 peptides identified in the enzymaticdigestion of tilapia by-products. Results According to sensory analysis, all 16 peptides werepredominantly salty with a threshold of 0.256 - 0.379 mmol/L with some sournessand astringency, among which HLDDALR had the highest salty intensity, followedby VIEPLDIGDDKVR, FPGIPDHL, and DFKSPDDPSRH. I addition, moleculardocking results showed these four core peptides with high salt intensity bound to thesalt receptor TRPV1 mainly via van der Waals interactions, hydrogen bonds, andhydrophobic forces; Arg491, Tyr487, VAL441, and Asp708 were the key sites for thebinding of salty peptides to TRPV1. Therefore, the application of batch moleculardocking using PyRx is effective and economical for the virtual screening of saltypeptides.
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Affiliation(s)
- Hongjun Ren
- College of Food Science and Engineering, Hainan University, Haikou, China
| | - Jingxuan Zhou
- College of Food Science and Engineering, Hainan University, Haikou, China
| | - Huixian Fu
- College of Food Science and Engineering, Hainan University, Haikou, China
| | - Qiaohui Feng
- College of Food Science and Engineering, Hainan University, Haikou, China
| | - Jionghao Wang
- College of Food Science and Engineering, Hainan University, Haikou, China
| | - Chuan Li
- College of Food Science and Engineering, Hainan University, Haikou, China
- Hainan Provincial Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, Haikou, China
- Key Laboratory of Seafood Processing of Haikou, Haikou, China
| | - Guanghua Xia
- College of Food Science and Engineering, Hainan University, Haikou, China
- Hainan Provincial Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, Haikou, China
- Key Laboratory of Seafood Processing of Haikou, Haikou, China
| | - Wenting Shang
- College of Food Science and Engineering, Hainan University, Haikou, China
| | - Yanfu He
- College of Food Science and Engineering, Hainan University, Haikou, China
- Hainan Provincial Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, Haikou, China
- Key Laboratory of Seafood Processing of Haikou, Haikou, China
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24
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Shi J, Chen X, Zhang Y, Shi T, Zhang R, Zhu S, Zong X, Wang C, Li L. A Stable Cell Line Co-expressing hTRPV1 and GCaMP6s: A Novel Cell-based Assay For High-throughput Screening of hTRPV1 Agonists. Comb Chem High Throughput Screen 2024; 27:298-306. [PMID: 37171000 DOI: 10.2174/1386207326666230511143259] [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: 11/01/2022] [Revised: 03/24/2023] [Accepted: 04/03/2023] [Indexed: 05/13/2023]
Abstract
BACKGROUND Transient receptor potential vanilloid-1 (TRPV1) is a non-selective cation channel capable of integrating various noxious chemical and physical stimuli. Recently, human TRPV1 (hTRPV1) has attracted wide attention from researchers because it is closely related to pain, inflammation, temperature perception, and tumors. Our study was aimed at generating a stable cell line co-expressing hTRPV1 receptor and GCaMP6s calcium indicator protein and, based on this, developing high-throughput screening methods for targeting hTRPV1 agonists. METHODS The CHO-hTRPV1-GCaMP6s cell line stably expressing hTRPV1 and GCaMP6s was generated by co-transfection of hTRPV1 and GCaMP6s into Chinese hamster ovary (CHO) cells. The high-throughput screening methods were developed based on detecting the concentration of intracellular calcium ions ([Ca2+]i) by using chemically synthesized dyes and genetically encoded calcium indicator (GECI). Meanwhile, the sensitivity and adaptability of these methods in the evaluation of capsaicinoids were also compared. RESULTS A stable cell line co-expressing hTRPV1 and GCaMP6s was generated and used to establish a functional high-throughput screening assay based on the measurement of [Ca2+]i by fluorometric imaging plate reader (FLIPR). The GECI exhibited a higher sensitivity and applicability than that of chemically synthesized dyes in detecting the changes in [Ca2+]i induced by capsaicin. The CHO-hTRPV1-GCaMP6s cell line was further used to detect the dose-dependent relationships of various hTRPV1 agonists (comparison of EC50 values: capsaicin (39 ± 1.67 nM) < nonivamide (67 ± 3.05 nM) < piperine (9222 ± 1851 nM)), and this order is consistent with the pharmacological properties of hTRPV1 activation by these agonists. CONCLUSION The successful establishment of the CHO-hTRPV1-GCaMP6s cell lines and their application in high-throughput screening of hTRPV1 agonists.
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Affiliation(s)
- Jingjing Shi
- Department of Laboratory of Pharmacology, State Key Laboratory of NBC Protection for Civilians, Beijing, 102205, China
| | - Xuejun Chen
- Department of Laboratory of Pharmacology, State Key Laboratory of NBC Protection for Civilians, Beijing, 102205, China
| | - Yi Zhang
- Department of Laboratory of Pharmacology, State Key Laboratory of NBC Protection for Civilians, Beijing, 102205, China
| | - Tong Shi
- Department of Laboratory of Pharmacology, State Key Laboratory of NBC Protection for Civilians, Beijing, 102205, China
| | - Ruihua Zhang
- Department of Laboratory of Pharmacology, State Key Laboratory of NBC Protection for Civilians, Beijing, 102205, China
| | - Siqing Zhu
- Department of Laboratory of Pharmacology, State Key Laboratory of NBC Protection for Civilians, Beijing, 102205, China
| | - Xingxing Zong
- Department of Laboratory of Pharmacology, State Key Laboratory of NBC Protection for Civilians, Beijing, 102205, China
| | - Chen Wang
- Department of Laboratory of Pharmacology, State Key Laboratory of NBC Protection for Civilians, Beijing, 102205, China
| | - Liqin Li
- Department of Laboratory of Pharmacology, State Key Laboratory of NBC Protection for Civilians, Beijing, 102205, China
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25
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Zou W, Zhang L, Hu Y, Gao Y, Zhang J, Zheng J. The role of TRPV ion channels in adipocyte differentiation: What is the evidence? Cell Biochem Funct 2024; 42:e3933. [PMID: 38269518 DOI: 10.1002/cbf.3933] [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: 07/25/2023] [Revised: 12/27/2023] [Accepted: 01/09/2024] [Indexed: 01/26/2024]
Abstract
Obesity is a complex disorder, and the incidence of obesity continues to rise at an alarming rate worldwide. In particular, the growing incidence of overweight and obesity in children is a major health concern. However, the underlying mechanisms of obesity remain unclear and the efficacy of several approaches for weight loss is limited. As an important calcium-permeable temperature-sensitive cation channel, transient receptor potential vanilloid (TRPV) ion channels directly participate in thermo-, mechano-, and chemosensory responses. Modulation of TRPV ion channel activity can alter the physiological function of the ion channel, leading to neurodegenerative diseases, chronic pain, cancer, and skin disorders. In recent years, increasing studies have demonstrated that TRPV ion channels are abundantly expressed in metabolic organs, including the liver, adipose tissue, skeletal muscle, pancreas, and central nervous system, which has been implicated in various metabolic diseases, including obesity and diabetes mellitus. In addition, as an important process for the pathophysiology of adipocyte metabolism, adipocyte differentiation plays a critical role in obesity. In this review, we focus on the role of TRPV ion channels in adipocyte differentiation to broaden the ideas for prevention and control strategies for obesity.
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Affiliation(s)
- Wenyu Zou
- Department of Endocrinology, Peking University First Hospital, Beijing, China
| | - Ling Zhang
- Department of Endocrinology, Peking University First Hospital, Beijing, China
| | - Yongyan Hu
- Laboratory Animal Facility, Peking University First Hospital, Beijing, China
| | - Ying Gao
- Department of Endocrinology, Peking University First Hospital, Beijing, China
| | - Junqing Zhang
- Department of Endocrinology, Peking University First Hospital, Beijing, China
| | - Jia Zheng
- Department of Endocrinology, Peking University First Hospital, Beijing, China
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26
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Wang W, Sun T. Impact of TRPV1 on Pathogenesis and Therapy of Neurodegenerative Diseases. Molecules 2023; 29:181. [PMID: 38202764 PMCID: PMC10779880 DOI: 10.3390/molecules29010181] [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: 10/25/2023] [Revised: 12/11/2023] [Accepted: 12/11/2023] [Indexed: 01/12/2024] Open
Abstract
Transient receptor potential vanilloid 1 (TRPV1) is a transmembrane and non-selective cation channel protein, which can be activated by various physical and chemical stimuli. Recent studies have shown the strong pathogenetic associations of TRPV1 with neurodegenerative diseases (NDs), in particular Alzheimer's disease (AD), Parkinson's disease (PD) and multiple sclerosis (MS) via regulating neuroinflammation. Therapeutic effects of TRPV1 agonists and antagonists on the treatment of AD and PD in animal models also are emerging. We here summarize the current understanding of TRPV1's effects and its agonists and antagonists as a therapeutic means in neurodegenerative diseases, and highlight future treatment strategies using natural TRPV1 agonists. Developing new targets and applying natural products are becoming a promising direction in the treatment of chronic disorders, especially neurodegenerative diseases.
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Affiliation(s)
| | - Tao Sun
- Center for Precision Medicine, School of Medicine and School of Biomedical Sciences, Huaqiao University, Xiamen 361021, China;
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27
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Zhu K, Wang L, Liao T, Li W, Zhou J, You Y, Shi J. Progress in the development of TRPV1 small-molecule antagonists: Novel Strategies for pain management. Eur J Med Chem 2023; 261:115806. [PMID: 37713804 DOI: 10.1016/j.ejmech.2023.115806] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/17/2023]
Abstract
Transient receptor potential vanilloid 1 (TRPV1) channels are widely distributed in sensory nerve endings, the central nervous system, and other tissues, functioning as ion channel proteins responsive to thermal pain and chemical stimuli. In recent years, the TRPV1 receptor has garnered significant interest as a potential therapeutic approach for various pain-related disorders, particularly TRPV1 antagonists. The present review offers a comprehensive, systematic exploration of both first- and second-generation TRPV1 antagonists in the context of pain management. Antagonists are categorized and explicated according to their structural characteristics. Detailed examination of binding modes, structural features, and pharmacological activities, alongside a critical appraisal of the advantages and limitations inherent to typical compounds within each structural category, are undertaken. Detailed discussions of the binding modes, structural features, pharmacological activities, advantages, and limitations of typical compounds within each structural category offer valuable insights and guidance for the future research and development of safer, more effective, and more targeted TRPV1 antagonists.
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Affiliation(s)
- Kun Zhu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China
| | - Lin Wang
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610072, China; State Key Laboratory of Biotherapy, Collaborative Innovation Center of Biotherapy and Cancer Center, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - TingTing Liao
- Department of Endocrinology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China
| | - Wen Li
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China
| | - Jing Zhou
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China
| | - Yaodong You
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China; TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Chengdu, 610072, China.
| | - Jianyou Shi
- Department of Pharmacy, Personalized Drug Therapy Key Laboratory of Sichuan Province, Sichuan Academy of Medical Science & Sichuan Provincial People's Hospital, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610072, China; State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
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28
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Dewaker V, Sharma AR, Debnath U, Park ST, Kim HS. Insights from molecular dynamics simulations of TRPV1 channel modulators in pain. Drug Discov Today 2023; 28:103798. [PMID: 37838068 DOI: 10.1016/j.drudis.2023.103798] [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: 07/28/2023] [Revised: 09/28/2023] [Accepted: 10/09/2023] [Indexed: 10/16/2023]
Abstract
TRPV1 is a nonselective cation channel vital for detecting noxious stimuli (heat, acid, capsaicin). Its role in pain makes it a potential drug target for chronic pain management, migraines, and related disorders. This review updates molecular dynamics (MD) simulation studies on the TRPV1 channel, focusing on its gating mechanism, ligand-binding sites, and implications for drug design. The article also explores challenges in developing modulators, SAR optimization, and clinical trial studies. Efforts have been undertaken to concisely present MD simulation findings, with a focus on their relevance to drug discovery.
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Affiliation(s)
- Varun Dewaker
- Institute of New Frontier Research Team, Hallym University, Chuncheon-si 24252, Gangwon-do, Republic of Korea
| | - Ashish R Sharma
- Institute for Skeletal Aging & Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Chuncheon-si 24252, Gangwon-do, Republic of Korea
| | - Utsab Debnath
- School of Health Sciences & Technology, UPES, Dehradun, Uttarakhand 248007, India
| | - Sung Taek Park
- Institute of New Frontier Research Team, Hallym University, Chuncheon-si 24252, Gangwon-do, Republic of Korea; Department of Obstetrics and Gynecology, Kangnam Sacred-Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Seoul 07441, Republic of Korea; EIONCELL Inc., Chuncheon 24252, Republic of Korea
| | - Hyeong Su Kim
- Institute of New Frontier Research Team, Hallym University, Chuncheon-si 24252, Gangwon-do, Republic of Korea; Division of Hemato-Oncology, Department of Internal Medicine, Kangnam Sacred-Heart Hospital, Hallym University Medical Center, Hallym University College of Medicine, Seoul 07441, Republic of Korea; EIONCELL Inc., Chuncheon 24252, Republic of Korea.
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29
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Li N, Li C, Li B, Li C, Zhao Q, Huang Z, Shu Y, Qu X, Wang B, Li S, Xing C. Dual Activation of Calcium Channels Using Near-Infrared Responsive Conjugated Oligomer Nanoparticles for Precise Regulation of Blood Glucose Homeostasis. NANO LETTERS 2023; 23:10608-10616. [PMID: 37948661 DOI: 10.1021/acs.nanolett.3c03701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
The rarity of efficient tools with spatiotemporal resolution and biocompatibility capabilities remains a major challenge for further progress and application of signaling manipulation. Herein, biomimetic conjugated oligomeric nanoparticles (CM-CONs) were developed to precisely modulate blood glucose homeostasis via the two-pronged activation of calcium channels. Under near-infrared (NIR) laser irradiation, CM-CONs efficiently generate local heat and reactive oxygen species (ROS), thereby simultaneously activating thermosensitive transient receptor potential V1 (TRPV1) and ROS-sensitive transient receptor potential A1 (TRPA1) calcium channels in small intestinal endocrine cells. The activation of the channels mediates inward calcium flow and then promotes glucagon-like peptide (GLP-1) secretion. Both in vitro and in vivo studies indicate that CM-CONs effectively regulate glucose homeostasis in diabetic model mice upon NIR light irradiation. This work develops a two-pronged attack strategy for accurately controlling blood glucose homeostasis, holding great prospects in the treatment for diabetes.
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Affiliation(s)
- Ning Li
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215000, P. R. China
| | - Chen Li
- School of Public Health, Tianjin Medical University, Tianjin 300070, P. R. China
| | - Boying Li
- School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Chaoqun Li
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Qi Zhao
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215000, P. R. China
| | - Zhongming Huang
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215000, P. R. China
| | - Yue Shu
- School of Public Health, Tianjin Medical University, Tianjin 300070, P. R. China
| | - Xiongwei Qu
- School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Baiqi Wang
- School of Public Health, Tianjin Medical University, Tianjin 300070, P. R. China
| | - Shengliang Li
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215000, P. R. China
| | - Chengfen Xing
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
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30
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Li S, Zheng J. The capsaicin binding affinity of wildtype and mutant TRPV1 ion channels. J Biol Chem 2023; 299:105268. [PMID: 37734552 PMCID: PMC10616419 DOI: 10.1016/j.jbc.2023.105268] [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: 07/12/2023] [Revised: 09/03/2023] [Accepted: 09/12/2023] [Indexed: 09/23/2023] Open
Abstract
Vanilloids such as capsaicin and resiniferatoxin are highly selective and potent activators for transient receptor potential vanilloid subfamily, member 1, a nociceptor for heat and pain perception. However, the intrinsic vanilloid binding affinity, key for understanding transient receptor potential vanilloid subfamily, member 1 function, remains unknown despite intensive investigations by electrophysiological, structural, and computational methods. In this study, we determined capsaicin binding affinity under physiological conditions by isolating individual binding steps to each subunit with concatemers. We estimated the capsaicin association constant of a wildtype subunit to be in the order of 106 M-1 and that of the Y511A mutant subunit to be a hundred times lower, in the order of 104 M-1. The Y511A mutation, located at the entrance of the vanilloid binding pocket, reduces binding affinity without a noticeable effect on activation gating. We further affirmed that there is little cooperativity between vanilloid binding steps. Models based on independent binding and equally cooperative subunit gating can accurately describe capsaicin activation.
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Affiliation(s)
- Shisheng Li
- Department of Physiology and Membrane Biology, University of California at Davis, School of Medicine, Davis California, USA
| | - Jie Zheng
- Department of Physiology and Membrane Biology, University of California at Davis, School of Medicine, Davis California, USA.
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31
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Wang L, Liu Y, Li S, Zha Z, Chen Y, Wang Q, Zhou S, Huang X, Xu M. Capsaicin alleviates doxorubicin-induced acute myocardial injury by regulating iron homeostasis and PI3K-Akt signaling pathway. Aging (Albany NY) 2023; 15:11845-11859. [PMID: 37916995 PMCID: PMC10683596 DOI: 10.18632/aging.205138] [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: 07/27/2023] [Accepted: 10/02/2023] [Indexed: 11/03/2023]
Abstract
BACKGROUND Capsaicin (CAP), a frequently occurring alkaloid component found in spicy peppers, has demonstrated therapeutic potential against tumors, metabolic disease, and cardiovascular disorders. Doxorubicin (DOX), a widely used anthracycline drug in chemotherapy, is notorious for its cardiotoxicity. This study aimed to investigate the potential of CAP in mitigating DOX toxicity in mouse hearts and H9C2 cells, as well as to explore the underlying mechanisms. METHODS In our study, we conducted experiments on both mice and H9C2 cells. The mice were divided into four groups and treated with different substances: normal saline, CAP, DOX and CAP+DOX. We evaluated the induction of ferroptosis by DOX and the remission of ferroptosis by CAP using various methods, including echocardiography, Hematoxylin and Eosin (H&E) staining, Masson's trichrome staining, and determination of ferroptosis metabolites, genes and proteins. Additionally, we employed RNA-seq to identify the inhibitory effect of CAP on DOX-induced myocardial apoptosis, which was further confirmed through western blotting. Similar approaches were applied to H9C2 cells, yielding reliable results. RESULTS Our study demonstrated that treatment with CAP improved the survival rate of DOX-treated mice and reduced myocardial injury. Mechanistically, CAP downregulated transferrin (Trf) and upregulated solute carrier family 40 member 1 (SLC40A1), which helped maintain iron levels in the cells and prevent ferroptosis. Furthermore, CAP inhibited DOX-induced apoptosis by modulating the phosphoinositide 3-kinase (PI3K)- protein kinase B (Akt) signaling pathway. Specifically, CAP activated the PI3K-Akt pathway and regulated downstream BCL2 and BAX to mitigate DOX-induced apoptosis. Therefore, our results suggest that CAP effectively alleviates acute myocardial injury induced by DOX. CONCLUSION Our findings demonstrate that CAP has the potential to alleviate DOX-induced ferroptosis by regulating iron homeostasis. Additionally, it can inhibit DOX-induced apoptosis by activating PI3K-Akt signaling pathway.
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Affiliation(s)
- Longbin Wang
- College of Clinical Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Ying Liu
- Department of Cardiology, Sixth Medical Center, PLA General Hospital, Beijing, China
| | - Si Li
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Zhijian Zha
- Chinese Internal Medicine, Shanxi University of Chinese Medicine, Taiyuan, China
| | - Yu Chen
- School of Tropical Agriculture and Forestry, Hainan University, Haikou, China
| | - Qi Wang
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Jiangsu University, Zhenjiang, China
| | - Shujing Zhou
- Faculty of Medicine, University of Debrecen, Debrecen, Hungary, China
| | - Xufeng Huang
- Faculty of Medicine, University of Debrecen, Debrecen, Hungary, China
| | - Ming Xu
- College of Clinical Veterinary Medicine, Huazhong Agricultural University, Wuhan, Hubei, China
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Peel J, John K, Page J, Jeffries O, Heffernan SM, Tallent J, Waldron M. Topical application of isolated menthol and combined menthol-capsaicin creams: Exercise tolerance, thermal perception, pain, attentional focus and thermoregulation in the heat. Eur J Sport Sci 2023; 23:2038-2048. [PMID: 37161852 DOI: 10.1080/17461391.2023.2211966] [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: 05/11/2023]
Abstract
We determined the effects of topically applied (i) isolated menthol cream, (ii) menthol and capsaicin co-application or (iii) placebo cream on exercise tolerance, thermal perception, pain, attentional focus and thermoregulation during exercise in the heat. Ten participants cycled at 70% maximal power output until exhaustion in 35°C and 20% relative humidity after application of (i) 5% isolated menthol, (ii) 5% menthol and 0.025% capsaicin co-application or (iii) placebo cream. Thermo-physiological responses were measured during exercise, with attentional focus and pain determined post-exercise on a 0-to-10 scale. Across the three conditions, time to exhaustion was 13.4 ± 4.8 min, mean ± SD infrared tympanic and skin temperature was 37.2 ± 0.6°C and 35.1 ± 1.2°C, respectively, and heart rate was 152 ± 47 bpm, with no changes between conditions (p > 0.05). Perceived exertion was lower in the isolated menthol vs. all other conditions (p < 0.05, ηp2 = 0.44). Thermal sensation was higher in menthol-capsaicin co-application vs. isolated menthol (p < 0.05, d = 1.1), while sweat rate was higher for capsaicin and menthol co-application compared to menthol (p < 0.05, d = 0.85). The median and interquartile range scores for pain were lower (p < 0.05) in the menthol condition (8, 7-8) compared to both menthol and capsaicin (10, 9-10) and placebo (9, 9-10), which was coupled with a greater distraction (p < 0.05) in the menthol condition (9, 7-10) compared to placebo (6, 5-7). Despite no performance effects for any topical cream application condition, these data reiterate the advantageous perceptual and analgesic role of menthol application and demonstrate no advantage of co-application with capsaicin.HighlightsTopical application of isolated menthol cream to cold-sensitive areas of the body during exhaustive exercise in the heat, elicited reduced perception of pain and enhanced sensation of cooling.While this reduction in generally unpleasant feelings (i.e. pain and heat) were coupled with lower RPE scores in the menthol condition and could be considered beneficial, there was no apparent ergogenic effect in an exercise tolerance test.Co-application of capsaicin and menthol appeared to inhibit the positive sensory effects elicited by menthol.Isolated menthol can induce changes in cognitive processes related to pain and exertion, while also reducing thermal sensation; however, the decision to use menthol creams must be balanced with the limited performance or thermoregulatory effects reported herein during exercise in hot environments.
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Affiliation(s)
- Jenny Peel
- A-STEM Centre, Faculty of Science & Engineering, Swansea University, Swansea, UK
| | - Kevin John
- A-STEM Centre, Faculty of Science & Engineering, Swansea University, Swansea, UK
| | - Joe Page
- A-STEM Centre, Faculty of Science & Engineering, Swansea University, Swansea, UK
| | - Owen Jeffries
- School of Biomedical, Nutritional and Sport Sciences, Newcastle University, Newcastle Upon Tyne, UK
| | - Shane M Heffernan
- A-STEM Centre, Faculty of Science & Engineering, Swansea University, Swansea, UK
| | - Jamie Tallent
- School of Sport, Rehabilitation, and Exercise Sciences, University of Essex, Colchester, UK
- Department of Physiotherapy, Faculty of Medicine, Nursing and Health Sciences, School of Primary and Allied Health Care, Monash University, Colchester, Australia
| | - Mark Waldron
- A-STEM Centre, Faculty of Science & Engineering, Swansea University, Swansea, UK
- Welsh Institute of Performance Science, Swansea University, Swansea, UK
- School of Health and Behavioural Sciences, University of the Sunshine Coast, Queensland, Australia
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Giordano D, Facchiano A, Minasi P, D’Agostino N, Parisi M, Carbone V. Phenolic Compounds and Capsaicinoids in Three Capsicum annuum Varieties: From Analytical Characterization to In Silico Hypotheses on Biological Activity. Molecules 2023; 28:6772. [PMID: 37836615 PMCID: PMC10574069 DOI: 10.3390/molecules28196772] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/14/2023] [Accepted: 09/21/2023] [Indexed: 10/15/2023] Open
Abstract
The affinity of specific phenolic compounds (PCs) and capsaicinoids (CAPs) present in three Capsicum annuum varieties (Friariello, Cayenne and Dzuljunska Sipka) to the transient receptor potential vanilloid member 1 (TRPV1) was investigated by integrating an analytic approach for the simultaneous extraction and analysis through high-performance liquid chromatography coupled with ion trap mass spectrometry (HPLC/ITMS) and UV detection (HPLC-UV) of PCs and CAPs and structural bioinformatics based on the protein modelling and molecular simulations of protein-ligand docking. Overall, a total of 35 compounds were identified in the different samples and CAPs were quantified. The highest content of total polyphenols was recorded in the pungent Dzuljunska Sipka variety (8.91 ± 0.05 gGAE/Kg DW) while the lowest was found in the non-pungent variety Friariello (3.58 ± 0.02 gGAE/Kg DW). Protein modelling generated for the first time a complete model of the homotetrameric human TRPV1, and it was used for docking simulations with the compounds detected via the analytic approach, as well as with other compounds, as an inhibitor reference. The simulations indicate that different capsaicinoids can interact with the receptor, providing details on the molecular interaction, with similar predicted binding energy values. These results offer new insights into the interaction of capsaicinoids with TRPV1 and their possible actions.
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Affiliation(s)
- Deborah Giordano
- Institute of Food Sciences, National Research Council, Via Roma 64, 83100 Avellino, Italy; (D.G.); (P.M.)
| | - Angelo Facchiano
- Institute of Food Sciences, National Research Council, Via Roma 64, 83100 Avellino, Italy; (D.G.); (P.M.)
| | - Paola Minasi
- Institute of Food Sciences, National Research Council, Via Roma 64, 83100 Avellino, Italy; (D.G.); (P.M.)
| | - Nunzio D’Agostino
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy;
| | - Mario Parisi
- CREA Research Centre for Vegetable and Ornamental Crops, Via Cavalleggeri 25, 84098 Pontecagnano, Italy;
| | - Virginia Carbone
- Institute of Food Sciences, National Research Council, Via Roma 64, 83100 Avellino, Italy; (D.G.); (P.M.)
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Lu X, Luo C, Wu J, Deng Y, Mu X, Zhang T, Yang X, Liu Q, Li Z, Tang S, Hu Y, Du Q, Xu J, Xie R. Ion channels and transporters regulate nutrient absorption in health and disease. J Cell Mol Med 2023; 27:2631-2642. [PMID: 37638698 PMCID: PMC10494301 DOI: 10.1111/jcmm.17853] [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: 04/19/2023] [Revised: 07/03/2023] [Accepted: 07/06/2023] [Indexed: 08/29/2023] Open
Abstract
Ion channels and transporters are ubiquitously expressed on cell membrane, which involve in a plethora of physiological process such as contraction, neurotransmission, secretion and so on. Ion channels and transporters is of great importance to maintaining membrane potential homeostasis, which is essential to absorption of nutrients in gastrointestinal tract. Most of nutrients are electrogenic and require ion channels and transporters to absorb. This review summarizes the latest research on the role of ion channels and transporters in regulating nutrient uptake such as K+ channels, Ca2+ channels and ion exchangers. Revealing the mechanism of ion channels and transporters associated with nutrient uptake will be helpful to provide new methods to diagnosis and find potential targets for diseases like diabetes, inflammatory bowel diseases, etc. Even though some of study still remain ambiguous and in early stage, we believe that ion channels and transporters will be novel therapeutic targets in the future.
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Affiliation(s)
- Xianmin Lu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Chen Luo
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Jiangbo Wu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Ya Deng
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Xingyi Mu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Ting Zhang
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Xiaoxu Yang
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Qi Liu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Zhuo Li
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Siqi Tang
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Yanxia Hu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Qian Du
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Jingyu Xu
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
| | - Rui Xie
- Department of GastroenterologyDigestive Disease Hospital, Affiliated Hospital of Zunyi Medical UniversityZunyiChina
- The Collaborative InnovAffiliated Hospital of Zunyi Medical Universityation Center of Tissue Damage Repair and Regeneration Medicine of Zunyi Medical UniversityZunyiChina
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Rodríguez-Ruiz M, Ramos MC, Campos MJ, Díaz-Sánchez I, Cautain B, Mackenzie TA, Vicente F, Corpas FJ, Palma JM. Pepper Fruit Extracts Show Anti-Proliferative Activity against Tumor Cells Altering Their NADPH-Generating Dehydrogenase and Catalase Profiles. Antioxidants (Basel) 2023; 12:1461. [PMID: 37507999 PMCID: PMC10376568 DOI: 10.3390/antiox12071461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/14/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
Cancer is considered one of the main causes of human death worldwide, being characterized by an alteration of the oxidative metabolism. Many natural compounds from plant origin with anti-tumor attributes have been described. Among them, capsaicin, which is the molecule responsible for the pungency in hot pepper fruits, has been reported to show antioxidant, anti-inflammatory, and analgesic activities, as well as anti-proliferative properties against cancer. Thus, in this work, the potential anti-proliferative activity of pepper (Capsicum annuum L.) fruits from diverse varieties with different capsaicin contents (California < Piquillo < Padrón < Alegría riojana) against several tumor cell lines (lung, melanoma, hepatoma, colon, breast, pancreas, and prostate) has been investigated. The results showed that the capsaicin content in pepper fruits did not correspond with their anti-proliferative activity against tumor cell lines. By contrast, the greatest activity was promoted by the pepper tissues which contained the lowest capsaicin amount. This indicates that other compounds different from capsaicin have this anti-tumor potentiality in pepper fruits. Based on this, green fruits from the Alegría riojana variety, which has negligible capsaicin levels, was used to study the effect on the oxidative and redox metabolism of tumor cell lines from liver (Hep-G2) and pancreas (MIA PaCa-2). Different parameters from both lines treated with crude pepper fruit extracts were determined including protein nitration and protein S-nitrosation (two post-translational modifications (PTMs) promoted by nitric oxide), the antioxidant capacity, as well as the activity of the antioxidant enzymes superoxide dismutase (SOD), catalase, and glutathione peroxidase (GPX), among others. In addition, the activity of the NADPH-generating enzymes glucose-6-phosphate dehydrogenase (G6PDH), 6-phosphogluconate dehydrogenase (6PGDH), and NADP-isocitrate dehydrogenase (NADP-ICDH) was followed. Our data revealed that the treatment of both cell lines with pepper fruit extracts altered their antioxidant capacity, enhanced their catalase activity, and considerably reduced the activity of the NADPH-generating enzymes. As a consequence, less H2O2 and NADPH seem to be available to cells, thus avoiding cell proliferation and possibly triggering cell death in both cell lines.
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Affiliation(s)
- Marta Rodríguez-Ruiz
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín (Spanish National Research Council, CSIC), 18008 Granada, Spain
| | - María C Ramos
- Department Screening & Target Validation, Fundación MEDINA, 18016 Granada, Spain
| | - María J Campos
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín (Spanish National Research Council, CSIC), 18008 Granada, Spain
| | - Inmaculada Díaz-Sánchez
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín (Spanish National Research Council, CSIC), 18008 Granada, Spain
| | - Bastien Cautain
- Evotec, University Paul Sabatier Toulouse III, 31100 Toulouse, France
| | - Thomas A Mackenzie
- Department Screening & Target Validation, Fundación MEDINA, 18016 Granada, Spain
| | - Francisca Vicente
- Department Screening & Target Validation, Fundación MEDINA, 18016 Granada, Spain
| | - Francisco J Corpas
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín (Spanish National Research Council, CSIC), 18008 Granada, Spain
| | - José M Palma
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín (Spanish National Research Council, CSIC), 18008 Granada, Spain
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36
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Zhang M, Ma Y, Ye X, Zhang N, Pan L, Wang B. TRP (transient receptor potential) ion channel family: structures, biological functions and therapeutic interventions for diseases. Signal Transduct Target Ther 2023; 8:261. [PMID: 37402746 DOI: 10.1038/s41392-023-01464-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/26/2023] [Accepted: 04/25/2023] [Indexed: 07/06/2023] Open
Abstract
Transient receptor potential (TRP) channels are sensors for a variety of cellular and environmental signals. Mammals express a total of 28 different TRP channel proteins, which can be divided into seven subfamilies based on amino acid sequence homology: TRPA (Ankyrin), TRPC (Canonical), TRPM (Melastatin), TRPML (Mucolipin), TRPN (NO-mechano-potential, NOMP), TRPP (Polycystin), TRPV (Vanilloid). They are a class of ion channels found in numerous tissues and cell types and are permeable to a wide range of cations such as Ca2+, Mg2+, Na+, K+, and others. TRP channels are responsible for various sensory responses including heat, cold, pain, stress, vision and taste and can be activated by a number of stimuli. Their predominantly location on the cell surface, their interaction with numerous physiological signaling pathways, and the unique crystal structure of TRP channels make TRPs attractive drug targets and implicate them in the treatment of a wide range of diseases. Here, we review the history of TRP channel discovery, summarize the structures and functions of the TRP ion channel family, and highlight the current understanding of the role of TRP channels in the pathogenesis of human disease. Most importantly, we describe TRP channel-related drug discovery, therapeutic interventions for diseases and the limitations of targeting TRP channels in potential clinical applications.
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Affiliation(s)
- Miao Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- Experiment Center for Science and Technology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- The Center for Microbes, Development and Health; Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Yueming Ma
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Xianglu Ye
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Ning Zhang
- Experiment Center for Science and Technology, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
| | - Lei Pan
- The Center for Microbes, Development and Health; Key Laboratory of Molecular Virology and Immunology, Institut Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, 200031, China.
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Bing Wang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
- Center for Pharmaceutics Research, Shanghai Institute of Materia Medica Chinese Academy of Sciences, Shanghai, 201203, China.
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37
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Li S, Nguyen PT, Vu S, Yarov-Yarovoy V, Zheng J. Opening of capsaicin receptor TRPV1 is stabilized equally by its four subunits. J Biol Chem 2023; 299:104828. [PMID: 37196769 PMCID: PMC10318505 DOI: 10.1016/j.jbc.2023.104828] [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: 02/25/2023] [Revised: 05/04/2023] [Accepted: 05/10/2023] [Indexed: 05/19/2023] Open
Abstract
Capsaicin receptor TRPV1 is a nociceptor for vanilloid molecules, such as capsaicin and resiniferatoxin (RTX). Even though cryo-EM structures of TRPV1 in complex with these molecules are available, how their binding energetically favors the open conformation is not known. Here, we report an approach to control the number of bound RTX molecules (0-4) in functional rat TRPV1. The approach allowed direct measurements of each of the intermediate open states under equilibrium conditions at both macroscopic and single-molecule levels. We found that RTX binding to each of the four subunits contributes virtually the same activation energy, which we estimated to be 1.70 to 1.86 kcal/mol and found to arise predominately from destabilizing the closed conformation. We further showed that sequential bindings of RTX increase open probability without altering single-channel conductance, confirming that there is likely a single open-pore conformation for TRPV1 activated by RTX.
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Affiliation(s)
- Shisheng Li
- Department of Physiology and Membrane Biology, School of Medicine, University of California at Davis, Davis, California, USA
| | - Phuong T Nguyen
- Department of Physiology and Membrane Biology, School of Medicine, University of California at Davis, Davis, California, USA
| | - Simon Vu
- Department of Physiology and Membrane Biology, School of Medicine, University of California at Davis, Davis, California, USA
| | - Vladimir Yarov-Yarovoy
- Department of Physiology and Membrane Biology, School of Medicine, University of California at Davis, Davis, California, USA
| | - Jie Zheng
- Department of Physiology and Membrane Biology, School of Medicine, University of California at Davis, Davis, California, USA.
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Romeo I, Brizzi A, Pessina F, Ambrosio FA, Aiello F, Belardo C, Carullo G, Costa G, De Petrocellis L, Frosini M, Luongo L, Maramai S, Paolino M, Moriello AS, Mugnaini C, Scorzelli F, Maione S, Corelli F, Di Marzo V, Alcaro S, Artese A. In Silico-Guided Rational Drug Design and Synthesis of Novel 4-(Thiophen-2-yl)butanamides as Potent and Selective TRPV1 Agonists. J Med Chem 2023; 66:6994-7015. [PMID: 37192374 DOI: 10.1021/acs.jmedchem.3c00447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We describe an in silico-guided rational drug design and the synthesis of the suggested ligands, aimed at improving the TRPV1-ligand binding properties and the potency of N-(4-hydroxy-3-methoxybenzyl)-4-(thiophen-2-yl) butanamide I, a previously identified TRPV1 agonist. The docking experiments followed by molecular dynamics simulations and thermodynamic analysis led the drug design toward both the introduction of a lipophilic iodine and a flat pyridine/benzene at position 5 of the thiophene nucleus. Most of the synthesized compounds showed high TRPV1 efficacy and potency as well as selectivity. The molecular modeling analysis highlighted crucial hydrophobic interactions between Leu547 and the iodo-thiophene nucleus, as in amide 2a, or between Phe543 and the pyridinyl moiety, as in 3a. In the biological evaluation, both compounds showed protective properties against oxidative stress-induced ROS formation in human keratinocytes. Additionally, while 2a showed neuroprotective effects in both neurons and rat brain slices, 3a exhibited potent antinociceptive effect in vivo..
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Affiliation(s)
- Isabella Romeo
- Dipartimento di Scienze della Salute, Università degli Studi "Magna Græcia" di Catanzaro, Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
- Net4Science Academic Spin-Off, Università degli Studi "Magna Græcia" di Catanzaro, Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
| | - Antonella Brizzi
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Federica Pessina
- Dipartimento di Medicina Molecolare e dello Sviluppo, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Francesca Alessandra Ambrosio
- Dipartimento di Medicina Sperimentale e Clinica, Università degli Studi "Magna Græcia" di Catanzaro, Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
| | - Francesca Aiello
- Dipartimento di Farmacia e Scienza della Salute e della Nutrizione, Università della Calabria, Via P. Bucci, 87036 Arcavacata di Rende, Cosenza, Italy
| | - Carmela Belardo
- Dipartimento di Medicina Sperimentale, Divisione di Farmacologia, Università degli Studi della Campania "L. Vanvitelli", |Via Costantinopoli 16, 80138 Napoli, Italy
| | - Gabriele Carullo
- Dipartimento di Scienze della Vita, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Giosuè Costa
- Dipartimento di Scienze della Salute, Università degli Studi "Magna Græcia" di Catanzaro, Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
- Net4Science Academic Spin-Off, Università degli Studi "Magna Græcia" di Catanzaro, Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
| | - Luciano De Petrocellis
- Endocannabinoid Research Group, Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, Comprensorio Olivetti, 80078 Pozzuoli, Napoli, Italy
| | - Maria Frosini
- Dipartimento di Scienze della Vita, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Livio Luongo
- Dipartimento di Medicina Sperimentale, Divisione di Farmacologia, Università degli Studi della Campania "L. Vanvitelli", |Via Costantinopoli 16, 80138 Napoli, Italy
| | - Samuele Maramai
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Marco Paolino
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Aniello Schiano Moriello
- Endocannabinoid Research Group, Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, Comprensorio Olivetti, 80078 Pozzuoli, Napoli, Italy
- Epitech Group SpA, Via L. Einaudi 13, 35030 Saccolongo, Padova, Italy
| | - Claudia Mugnaini
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Francesco Scorzelli
- Recipharm (Edmond Pharma), Strada Statale dei Giovi 131, 20037 Paderno Dugnano, Milano, Italy
| | - Sabatino Maione
- Dipartimento di Medicina Sperimentale, Divisione di Farmacologia, Università degli Studi della Campania "L. Vanvitelli", |Via Costantinopoli 16, 80138 Napoli, Italy
| | - Federico Corelli
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Vincenzo Di Marzo
- Endocannabinoid Research Group, Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, Comprensorio Olivetti, 80078 Pozzuoli, Napoli, Italy
- Heart and Lung Research Institute, Department of Medicine, Faculty of Medicine, and Institute of Nutrition and Functional Foods, NUTRISS Center, School of Nutrition, Faculty of Agriculture and Food Science, Université Laval, 2325 Rue de l'Université, Québec, Canada
| | - Stefano Alcaro
- Dipartimento di Scienze della Salute, Università degli Studi "Magna Græcia" di Catanzaro, Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
- Net4Science Academic Spin-Off, Università degli Studi "Magna Græcia" di Catanzaro, Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
| | - Anna Artese
- Dipartimento di Scienze della Salute, Università degli Studi "Magna Græcia" di Catanzaro, Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
- Net4Science Academic Spin-Off, Università degli Studi "Magna Græcia" di Catanzaro, Campus "S. Venuta", Viale Europa, 88100 Catanzaro, Italy
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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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40
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Shang L, Zhao S, Shi H, Xing X, Zhang J, He Y. Nerve growth factor mediates activation of transient receptor potential vanilloid 1 in neurogenic pruritus of psoriasis. Int Immunopharmacol 2023; 118:110063. [PMID: 37004343 DOI: 10.1016/j.intimp.2023.110063] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/04/2023] [Accepted: 03/19/2023] [Indexed: 04/03/2023]
Abstract
Pruritus is a common and painful symptom in psoriasis with profoundly negative impacts on quality of life. The underlying mechanisms of pruritus are complex and multifactorial, and accumulating evidence suggests that pruritus induced by neurogenic inflammation predominates in psoriasis. Nerve growth factor (NGF) -mediated transient receptor potential vanilloid receptor 1(TRPV1) pathway has emerged as a crucial node in the regulation of neurogenic pruritus. TRPV1 appears coupled to most pruritus-specific molecules via the neuro-immune axis. While the modes of regulation differ for each axis, TRPV1 is involved in substantial biochemical crosstalk-causing feedback loops with significant effects on neurogenic pruritus. Therefore, TRPV1 has emerged as a target molecular in drug development for pruritus in psoriasis. However, no significant clinical progress occurred in the development of systemic TRPV1 antagonists due to elevated core temperature. Thus, topical application of TRPV1 antagonists and interference with mediators linked to the TRPV1 activation pathway may be promising therapeutic options to ameliorate pruritus. This Review focuses on recent advances in complicated regulation of NGF-mediated TRPV1 pathway in psoriatic neurogenic pruritus, as well as the therapeutic options that arise from the dissection of the pathway.
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Xu S, Liang S, Pei Y, Wang R, Zhang Y, Xu Y, Huang B, Li H, Li J, Tan B, Cao H, Guo S. TRPV1 Dysfunction Impairs Gastric Nitrergic Neuromuscular Relaxation in High-Fat Diet-Induced Diabetic Gastroparesis Mice. THE AMERICAN JOURNAL OF PATHOLOGY 2023; 193:548-557. [PMID: 36740184 DOI: 10.1016/j.ajpath.2023.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/30/2022] [Accepted: 01/06/2023] [Indexed: 02/05/2023]
Abstract
Diabetic gastroparesis (DGP) is characterized by delayed gastric emptying of solid food. Nitrergic neuron-mediated fundus relaxation and intragastric peristalsis are pivotal for gastric emptying and are impaired in DGP. Transient receptor potential vanilloid 1 (TRPV1) ion channels are expressed in gastrointestinal vagal afferent nerves and have a potential role in relevant gastrointestinal disorders. In this study, mice with high-fat diet (HFD)-induced type 2 diabetes mellitus (T2DM), associated with gastroparesis, were used to determine the role of TRPV1 in DGP. After feeding with HFD, mice exhibited obesity, hyperglycemia, insulin resistance, and delayed gastric emptying. Cholinergic- and nitrergic neuron-mediated neuromuscular contractions and relaxation were impaired. The antral tone of the DGP mice was attenuated. Interestingly, activating or suppressing TRPV1 facilitated or inhibited gastric fundus relaxation in normal mice. These effects were neutralized by using a nitric oxide synthase (NOS) inhibitor. Activation or suppression of TRPV1 also increased or reduced NO release. TRPV1 was specifically localized with neuronal NOS in the gastric fundus. These data suggest that TRPV1 activation facilitates gastric fundus relaxation by regulating neuronal NOS and promoting NO release. However, these effects and mechanisms disappeared in mice with DGP induced by HFD diet. TRPV1 expression was only marginally decreased in the fundus of DGP mice. TRPV1 dysfunction may be a potential mechanism underlying the dysfunction of DGP gastric nitrergic neuromuscular relaxation.
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Affiliation(s)
- Siyuan Xu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China; Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Shaochan Liang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ying Pei
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Rui Wang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yao Zhang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yifei Xu
- Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Bin Huang
- Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Haiwen Li
- Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Juanjuan Li
- Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Bo Tan
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hongying Cao
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China.
| | - Shaoju Guo
- Shenzhen Traditional Chinese Medicine Hospital, The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, Shenzhen, China.
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Seo SE, Lim SG, Kim KH, Kim J, Shin CJ, Kim S, Kim L, Lee SH, Jang SY, Oh HW, Lee HA, Kim WK, Park YM, Lee KG, Lee SH, Ha S, Kwon OS. Reusable Electronic Tongue Based on Transient Receptor Potential Vanilloid 1 Nanodisc-Conjugated Graphene Field-Effect Transistor for a Spiciness-Related Pain Evaluation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2206198. [PMID: 36856042 DOI: 10.1002/adma.202206198] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 02/15/2023] [Indexed: 05/12/2023]
Abstract
The sense of spiciness is related to the stimulation of vanilloid compounds contained in the foods. Although, the spiciness is commonly considered as the part of taste, it is more classified to the sense of pain stimulated on a tongue, namely, pungency, which is described as a tingling or burning on the tongue. Herein, first, a reusable electronic tongue based on a transient receptor potential vanilloid 1 (TRPV1) nanodisc conjugated graphene field-effect transistor is fabricated and spiciness-related pain evaluation with reusable electrode is demonstrated. The pungent compound reactive receptor TRPV1 is synthesized in the form of nanodiscs to maintain stability and reusability. The newly developed platform shows highly selective and sensitive performance toward each spiciness related vanilloid compound repeatably: 1 aM capsaicin, 10 aM dihydrocapsaicin, 1 fM piperine, 10 nM allicin, and 1 pM AITC. The binding mechanism is also examined by simulation. Furthermore, the elimination of the burning sensation on the tongue after eating spicy foods is not investigated. Based on the synthesis of micelles composed of casein protein (which is contained in skim milk) that remove pungent compounds bound to TRPV1 nanodisc, the deactivation of TRPV1 is investigated, and the electrode is reusable that mimics electronic tongue.
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Affiliation(s)
- Sung Eun Seo
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- Department of Nano Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, 16419, South Korea
| | - Seong Gi Lim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- Department of Nano Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, 16419, South Korea
| | - Kyung Ho Kim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- Department of Nano Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, 16419, South Korea
| | - Jinyeong Kim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Chan Jae Shin
- Department of Nano Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, 16419, South Korea
| | - Soomin Kim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Lina Kim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Seung Hwan Lee
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, 15588, South Korea
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon, 34158, South Korea
| | - Song Yee Jang
- Core Research Facility & Analysis Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, MD, 21853, United States
| | - Hyun Woo Oh
- Core Research Facility & Analysis Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, MD, 21853, United States
| | - Hyang-Ae Lee
- Department of Predictive Toxicology, Korea Institute of Toxicology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, South Korea
| | - Woo-Keun Kim
- Department of Predictive Toxicology, Korea Institute of Toxicology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, South Korea
| | - Yoo Min Park
- Center for NanoBio Development, National NanoFab Center, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Kyoung G Lee
- Center for NanoBio Development, National NanoFab Center, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea
| | - Sang Hun Lee
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon, 34158, South Korea
| | - Siyoung Ha
- School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, MD, 21853, United States
| | - Oh Seok Kwon
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon, 34141, South Korea
- Department of Nano Engineering, SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, 16419, South Korea
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Song J, Jiang M, Jin Y, Li H, Li Y, Liu Y, Yu H, Huang X. Phytol from Faeces Bombycis alleviated migraine pain by inhibiting Nav1.7 sodium channels. JOURNAL OF ETHNOPHARMACOLOGY 2023; 306:116161. [PMID: 36646158 DOI: 10.1016/j.jep.2023.116161] [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: 09/18/2022] [Revised: 12/11/2022] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Faeces Bombycis (silkworm excrement, called Cansha in Chinese), is the dried faeces of the larvae of silkworm. According to the theories of traditional Chinese medicine recorded in "Compendium of Materia Medica", Faeces Bombycis has often been prescribed in traditional Chinese medicine for the treatment of recurrent headache, rheumatalgia, rubella and itching et al. However, the bioactive components and their exact mechanisms underlying the pain-relieving effects remain to be revealed. AIM OF THE STUDY The present study aimed to evaluate the analgesic effect of Faeces Bombycis extract (FBE) on migraine, explore the main active constituents and investigate the pharmacological mechanisms for its pain relief. MATERIALS AND METHODS The bioactivity of different extracts from Faeces Bombycis was tracked by the nitroglycerin (NTG)-induced migraine model on rats and identified by NMR spectroscopic data. Whole-cell patch clamp technique, an electrophysiological method, was used to screen the potential targets and study the mechanism of action for the bioactive compound. The following targets have been screened and studied, including Nav1.7 sodium channels, Nav1.8 sodium channels, TRPV1 channels and TRPA1 channels. The trigeminal ganglion neurons were further used to study the effects of the identified compound on neuronal excitability. RESULTS By testing the bioactivity of the different extracts proceedingly, fraction petroleum ether showed higher anti-migraine activity. Through further step-by-step isolations, 7 compounds were isolated. Among them, phytol was identified with the highest yield and displayed a potent anti-migraine effect. By screening the potential ion channel targets for migraine, phytol was found to preferentially block the inactivated state of Nav1.7 sodium channels with half-inhibition concentration 0.32 ± 0.05 μM. Thus, the effects of phytol on the biophysical properties of Nav1.7 sodium channels were further characterized. Phytol induced a hyperpolarizing shift of voltage-dependent inactivation and slowed the recovery from inactivation. The affinity of phytol became weaker in the inactivation-deficient Nav1.7 channels (Nav1.7-WCW). And such an effect was independent on the local anesthetic site (Nav1.7 F1737A). Consistent with the data from recombinant channels, the compound also displayed state-dependent inhibition on neuronal sodium channels and further decreased the neuronal excitability in trigeminal ganglion neurons. Moreover, besides Nav1.7 channel, phytol also antagonized the activation of TRPV1 and TRPA1 channels at micromolar concentrations with a weaker affinity. CONCLUSION Our results demonstrated that phytol is the major anti-migraine ingredient of Faeces Bombycis and alleviates migraine behaviors by acting on Nav1.7 sodium channels in the trigeminal ganglion neurons. This study provided evidences for the therapeutic application of Faeces Bombycis and phytol on migraine disease.
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Affiliation(s)
- Jianan Song
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming, 650504, China; State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China; Department of Neurobiology, Harbin Medical University, Harbin, 150086, China.
| | - Mengyuan Jiang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming, 650504, China.
| | - Yuchen Jin
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China.
| | - Hongrui Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming, 650504, China.
| | - Yanhong Li
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming, 650504, China.
| | - Yumei Liu
- Department of Neurobiology, Harbin Medical University, Harbin, 150086, China.
| | - Haibo Yu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, China.
| | - Xiangzhong Huang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan Minzu University, Kunming, 650504, China.
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Bustos D, Galarza C, Ordoñez W, Brauchi S, Benso B. Cost-Effective Pipeline for a Rational Design and Selection of Capsaicin Analogues Targeting TRPV1 Channels. ACS OMEGA 2023; 8:11736-11749. [PMID: 37033853 PMCID: PMC10077575 DOI: 10.1021/acsomega.2c05672] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 11/25/2022] [Indexed: 06/19/2023]
Abstract
Transient receptor potential (TRP) channels constitute a large group of membrane receptors associated with sensory pathways in vertebrates. One of the most studied is TRPV1, a polymodal receptor tuned for detecting heat and pungent compounds. Specific inhibition of the nociceptive transduction at the peripheral nerve represents a convenient approach to pain relief. While acting as a chemoreceptor, TRPV1 shows high sensitivity and selectivity for capsaicin. In contrast to the drugs available on the market that target the inflammatory system, TRPV1 antagonists act as negative modulators of nociceptive transduction. Therefore, the development of compounds modulating TRPV1 activity has expanded dramatically over time. Experimental data suggest that most agonist and antagonist drugs interact at or near capsaicin's binding site. In particular, the properties of capsaicin's head play an essential role in modulating potency and affinity. Here, we explored a cost-efficient pipeline to predict the effects of introducing chemical modifications into capsaicin's head region. An extensive set of molecules was selected by first considering the geometrical properties of capsaicin's binding site and then molecular docking. Finally, the novel ligands were ranked by combining molecular and pharmacokinetic predictions.
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Affiliation(s)
- Daniel Bustos
- Centro
de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoría
de Investigación y Postgrado, Universidad
Católica del Maule, Talca 3460000, Chile
- Laboratorio
de Bioinformática y Química Computacional, Departamento
de Medicina Traslacional, Facultad de Medicina, Universidad Católica del Maule, Talca 3480094, Chile
| | - Christian Galarza
- Facultad
de Ciencias Naturales y Matemáticas, Escuela Superior Politécnica del Litoral, ESPOL, Guayaquil 090703, Ecuador
| | - Wilson Ordoñez
- Facultad
de Ciencias Naturales y Matemáticas, Escuela Superior Politécnica del Litoral, ESPOL, Guayaquil 090703, Ecuador
| | - Sebastian Brauchi
- Department
of Physiology, Faculty of Medicine, Universidad
Austral de Chile, Valdivia 5090000, Chile
- Millennium
Nucleus of Ion Channels Associated Diseases (MiNICAD), 8330024, Chile
| | - Bruna Benso
- Millennium
Nucleus of Ion Channels Associated Diseases (MiNICAD), 8330024, Chile
- School of
Dentistry, Faculty of Medicine, Pontificia
Universidad Católica de Chile, Santiago 8330024, Chile
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Oz M, Lorke DE, Howarth FC. Transient receptor potential vanilloid 1 (TRPV1)-independent actions of capsaicin on cellular excitability and ion transport. Med Res Rev 2023. [PMID: 36916676 DOI: 10.1002/med.21945] [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: 06/14/2022] [Revised: 01/17/2023] [Accepted: 02/26/2023] [Indexed: 03/15/2023]
Abstract
Capsaicin is a naturally occurring alkaloid derived from chili pepper that is responsible for its hot pungent taste. Capsaicin is known to exert multiple pharmacological actions, including analgesia, anticancer, anti-inflammatory, antiobesity, and antioxidant effects. The transient receptor potential vanilloid subfamily member 1 (TRPV1) is the main receptor mediating the majority of the capsaicin effects. However, numerous studies suggest that the TRPV1 receptor is not the only target for capsaicin. An increasing number of studies indicates that capsaicin, at low to mid µM ranges, not only indirectly through TRPV1-mediated Ca2+ increases, but also directly modulates the functions of voltage-gated Na+ , K+ , and Ca2+ channels, as well as ligand-gated ion channels and other ion transporters and enzymes involved in cellular excitability. These TRPV1-independent effects are mediated by alterations of the biophysical properties of the lipid membrane and subsequent modulation of the functional properties of ion channels and by direct binding of capsaicin to the channels. The present study, for the first time, systematically categorizes this diverse range of non-TRPV1 targets and discusses cellular and molecular mechanisms mediating TRPV1-independent effects of capsaicin in excitable, as well as nonexcitable cells.
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Affiliation(s)
- Murat Oz
- Department of Pharmacology and Therapeutics, Faculty of Pharmacy, Kuwait University, Safat, Kuwait
| | - Dietrich E Lorke
- Department of Anatomy and Cellular Biology, College of Medicine and Health Sciences, Khalifa University, Abu Dhabi, United Arab Emirates.,Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Frank C Howarth
- Department of Physiology, College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates
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Novel capsaicin cough endpoints effectively discriminate between healthy controls and patients with refractory chronic cough. Respir Med 2023; 208:107142. [PMID: 36736541 DOI: 10.1016/j.rmed.2023.107142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/24/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023]
Abstract
RATIONALE Chronic cough is a common problem, substantially affecting quality of life. Effective treatments and diagnostic clinical tools for refractory chronic cough are lacking which remains a diagnosis of exclusion. OBJECTIVES To investigate capsaicin evoked cough responses in healthy volunteers and refractory chronic cough patients and assess the discriminatory ability of novel endpoints. METHODS Dose-response capsaicin cough challenges were performed, and receiver operating characteristic curves constructed to evaluate the discriminatory value of novel endpoints; Emax (maximum number of coughs evoked by any capsaicin concentration) and ED50 (capsaicin concentration evoking at least half of Emax). MEASUREMENTS AND MAIN RESULTS Ninety-three healthy volunteers (median age 39yrs(IQR; 29-52), 47 females) and 51 refractory chronic cough patients (59yrs(53-67), 31 females) were studied. Emax was significantly higher in the patient group compared to healthy volunteers (p < 0.001) and ED50 was significantly lower (p = 0.001). Both parameters were influenced by gender; females had a higher Emax (p = 0.009) and more sensitive ED50 (p < 0.001) but there were no correlations with other patient demographics. There was a significant relationship between Emax and cough frequency in the patient group (p < 0.001). Emax effectively discriminated between the groups (AUC = 0.83, 95% CI; 0.75-0.90, p < 0.001) independently of ED50 which was less favourable (AUC = 0.66, 95% CI; 0.57-0.76, p = 0.002). Emax and ED50 were shown to be repeatable, and the dose-response method well tolerated. CONCLUSION Novel capsaicin dose-response endpoints effectively discriminate between healthy controls and refractory chronic cough patients, which may better represent pathophysiological mechanisms and show promise for development as a tool to identify patients with cough hyper-excitability. CLINICAL TRIAL REGISTRATION www.isrctn.com; ISRCTN23684347.
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Mangwani-Mordani S, Goodman CF, Galor A. Novel Treatments for Chronic Ocular Surface Pain. Cornea 2023; 42:261-271. [PMID: 36729473 PMCID: PMC9918665 DOI: 10.1097/ico.0000000000003193] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 09/28/2022] [Indexed: 02/03/2023]
Abstract
ABSTRACT Several etiologies can contribute to ocular surface pain including nociceptive, peripheral neuropathic, and central neuropathic mechanisms. Clinical clues can help identify contributors to ocular surface pain in a patient. In individuals whose pain persists despite targeting nociceptive contributors, neuropathic mechanisms should be considered and addressed using oral, topical, and/or adjuvant agents.
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Affiliation(s)
- Simran Mangwani-Mordani
- Surgical Services, Miami Veterans Affairs Medical Center, 1201 NW 17 Street, Miami, FL, 33125, USA
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami, 900 NW 17 Street, Miami, FL 33136, USA
| | - Courtney F. Goodman
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami, 900 NW 17 Street, Miami, FL 33136, USA
| | - Anat Galor
- Surgical Services, Miami Veterans Affairs Medical Center, 1201 NW 17 Street, Miami, FL, 33125, USA
- Bascom Palmer Eye Institute, Department of Ophthalmology, University of Miami, 900 NW 17 Street, Miami, FL 33136, USA
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Yao Z, Yuan L, Chen X, Wang Q, Chai L, Lu X, Yang F, Wang Y, Yang S. A thermal receptor for nonvisual sunlight detection in myriapods. Proc Natl Acad Sci U S A 2023; 120:e2218948120. [PMID: 36780532 PMCID: PMC9974506 DOI: 10.1073/pnas.2218948120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 01/11/2023] [Indexed: 02/15/2023] Open
Abstract
Organisms from cyanobacteria to humans have evolved a wide array of photoreceptive strategies to detect light. Sunlight avoidance behavior is common in animals without vision or known photosensory genes. While indirect light perception via photothermal conversion is a possible scenario, there is no experimental evidence for this hypothesis. Here, we show a nonvisual and extraocular sunlight detection mechanism by identifying the broad-range thermal receptor 1 (BRTNaC1, temperature range = 33 to 48 °C) in centipede antennae. BRTNaC1, a heat-activated cation-permeable ion channel, is structurally related to members of the epithelial sodium channel family. At the molecular level, heat activation of BRTNaC1 exhibits strong pH dependence controlled by two protonatable sites. Physiologically, temperature-dependent activation of BRTNaC1 upon sunlight exposure comes from a striking photothermal effect on the antennae, where a slightly acidic environment (pH 6.1) of the body fluid leads to the protonation of BRTNaC1 and switches on its high thermal sensitivity. Furthermore, testosterone potently inhibits heat activation of BRTNaC1 and the sunlight avoidance behavior of centipedes. Taken together, our study suggests a sophisticated strategy for nonvisual sunlight detection in myriapods.
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Affiliation(s)
- Zhihao Yao
- College of Wildlife and Protected Area, Northeast Forestry University150040Harbin, China
| | - Licheng Yuan
- College of Wildlife and Protected Area, Northeast Forestry University150040Harbin, China
| | - Xiaoying Chen
- Department of Biophysics and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine310058Hangzhou, China
| | - Qian Wang
- College of Wildlife and Protected Area, Northeast Forestry University150040Harbin, China
| | - Longhui Chai
- College of Wildlife and Protected Area, Northeast Forestry University150040Harbin, China
| | - Xiancui Lu
- College of Wildlife and Protected Area, Northeast Forestry University150040Harbin, China
| | - Fan Yang
- Department of Biophysics and Kidney Disease Center of the First Affiliated Hospital, Zhejiang University School of Medicine310058Hangzhou, China
| | - Yunfei Wang
- College of Wildlife and Protected Area, Northeast Forestry University150040Harbin, China
| | - Shilong Yang
- College of Wildlife and Protected Area, Northeast Forestry University150040Harbin, China
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Role of dairy proteins in the reduction of capsaicin-induced oral burning pain. Physiol Behav 2023; 259:114036. [PMID: 36403780 DOI: 10.1016/j.physbeh.2022.114036] [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: 05/30/2022] [Revised: 11/02/2022] [Accepted: 11/16/2022] [Indexed: 11/18/2022]
Abstract
Capsaicin-induced burning sensation in the oral mucosa can be relieved by skimmed and whole milk. The mechanism behind this effect, however, is unknown. This study aimed to asses the role of milk proteins in reducing capsaicin-induced oral burning sensation. 24 healthy participants were included in this single-blinded cross-over study consisting of four sessions. In each sessions, mucosal burning sensation was evoked by having the participants dip their tongues in a cup containing 0.1% capsaicin gel for a total of 8 min. The perceived levels of unpleasantness and burning intensity were scored on two different numerical rating scales. After capsaicin exposure, the participants rinsed their mouth for 10 s with a different solution in each session (3.5% casein, 3.5% whey, 3.5% lactose (non-protein control) and skimmed milk (active/positive control)). Mechanical (64, 128 and 256 mN pinprick) and thermal (5, 40, 45 and 50 ̊C) sensitivity of the tongue was measured using semi-quantative sensory testing at baseline, immediately after capsaicin exposure and when the scores for unpleasantness and burning intensity reached the minimum value of 0. Thermographic images of the tongue were taken at the same time-points. Overall, no statistically significant difference in unpleasantness and burning intensity was found between the four sessions (P ≥ 0.070). Explorative pair-wise comparisons, however, showed slight short-term reduction in unpleasantness and burning intensity when comparing the casein solution with the lactose solution (P ≤ 0.020). Scores for burning intensity and unpleasantness varied over time (P ≤ 0.001). Statistically significant changes in heat and mechanical sensitivity was observed between time-points (P < 0.001) but not sessions (P ≥ 0.410). An increased sensitivity towards heat and a decreased sensitivity towards mechanical stimuli was observed after capsaicin exposure compared with baseline (P < 0.001). Similarly, changes in thermographic temperature of the tongue was observed between time-points (P < 0.001), but not sessions (P ≥ 0.827). An increased maximum, minimum and average temperature of the tongue was observed immediately after capsaicin exposure compared with baseline (P < 0.001). In conclusion, short-term rinsing with room temperature milk proteins did not robustly alter capsaicin-induced oral burning sensation, unpleasantness, somatosensory changes or tongue temperature compared with control. Further studies exploring the effects of increased rinsing time and concentrations are needed in the future.
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Zhang J, Zhou J, Yu Y, Cai Y, Li Z, Lu Y, Zhao J. Sesamin Induces the Transdifferentiation of Type II Alveolar Epithelial Cells via AnnexinA1 and TRPV1. Lung 2023; 201:65-77. [PMID: 36735045 DOI: 10.1007/s00408-023-00598-7] [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: 10/31/2022] [Accepted: 01/13/2023] [Indexed: 02/04/2023]
Abstract
PURPOSE Acute lung injury (ALI) with high rates of morbidity is often accompanied by the apoptosis in the type I alveolar epithelial cells (ATIs). Thus, the transdifferentiation of type II alveolar epithelial cells (ATIIs) into ATIs is crucial for the maintenance of alveolar epithelial functions. We aimed to elucidate the role of sesamin in the transdifferentiation of ATIIs to ATIs and the involvement of the TRPV1/AKT pathway. METHODS In vivo, the mouse model of ALI was simulated by intraperitoneal and intratracheal injections of lipopolysaccharide (LPS), respectively. The protective effects of sesamin on ALI were investigated using the survival rate, lung/body weight ratio, histological analysis of lung with HE staining, and mRNA levels of inflammatory factors. Western blot analysis and immunofluorescence detection of ATIs marker AQP5 were used to evaluate the protective effect of sesamin on ATIs. Western blot, EdU, and qPCR analyses were applied to detect changes in apoptosis, proliferation, and transdifferentiation markers of ATII A549 cell lines. Small interfering RNA (siRNA) was used to detect the involvement and relationships between the sesamin receptors (ANXA1 and TRPV1) and the AKT pathway in transdifferentiation. RESULTS Sesamin (200 mg/kg) significantly improved LPS-induced ALI and inhibited LPS-induced ATIs reduction. A low concentration of sesamin (20 μM) promoted the transdifferentiation of ATIIs to ATIs. Both ANXA1 and TRPV1 were involved in sesamin-promoted transdifferentiation, while the P-AKT (S473) level was down-regulated by TRPV1 siRNA. CONCLUSION Sesamin may promote transdifferentiation of ATII to ATI to ultimately rescue ALI, with TRPV1/AKT pathway involved in this transdifferentiation. This study revealed a novel role of sesamin in promoting the transdifferentiation of ATIIs to ATIs, providing experimental supports for the potential targets of ALI therapy.
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Affiliation(s)
- Jiaojiao Zhang
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, 266237, People's Republic of China
| | - Jinrun Zhou
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, 266237, People's Republic of China
| | - Yifan Yu
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, 266237, People's Republic of China
| | - Yuqing Cai
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, 266237, People's Republic of China
| | - Zhiliang Li
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, 266237, People's Republic of China
| | - Yao Lu
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, 266237, People's Republic of China
| | - Jing Zhao
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Science, Shandong University, Qingdao, 266237, People's Republic of China.
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