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Tang Y, Zhou Y, Ren J, Wang Y, Li X, Qi M, Yang Y, Zhu C, Wang C, Ma Y, Tang Z, Yu G. TRPV4-β-catenin axis is a novel therapeutic target for dry skin-induced chronic itch. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167491. [PMID: 39218273 DOI: 10.1016/j.bbadis.2024.167491] [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: 01/19/2024] [Revised: 08/13/2024] [Accepted: 08/22/2024] [Indexed: 09/04/2024]
Abstract
Dry skin induced chronic pruritus is an increasingly common and debilitating problem, especially in the elderly. Although keratinocytes play important roles in innate and adaptive immunity and keratinocyte proliferation is a key feature of dry skin induced chronic pruritus, the exact contribution of keratinocytes to the pathogenesis of dry skin induced chronic pruritus is poorly understood. In this study, we generated the acetone-ether-water induced dry skin model in mice and found that epidermal hyperplasia induced by this model is partly dependent on the β-catenin signaling pathway. XAV939, an antagonist of β-catenin signaling pathway, inhibited epidermal hyperplasia in dry skin model mice. Importantly, dry skin induced chronic pruritus also dramatically reduced in XAV939 treated mice. Moreover, acetone-ether-water treatment-induced epidermal hyperplasia and chronic itch were decreased in Trpv4-/- mice. In vitro, XAV939 inhibited hypo-osmotic stress induced proliferation of HaCaT cells, and hypo-osmotic stress induced proliferation of in HaCaT cells and primary cultured keratinocytes were also significantly reduced by blocking TRPV4 function. Finally, thymic stromal lymphopoietin release was examined both in vivo and in vitro, which was significantly inhibited by XAV939 treatment and Trpv4 deficiency, and anti-TSLP antibody treatment significantly decreased AEW-induced scratching behavior. Overall, our study revealed a unique ability of TRPV4 expressing keratinocytes in the skin, which critically mediated dry skin induced epidermal hyperplasia and chronic pruritus, thus provided novel insights into the development of therapies for chronic pruritus in the elderly.
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Affiliation(s)
- Ye Tang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Yuan Zhou
- Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Jiahui Ren
- Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Yin Wang
- Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Xue Li
- Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Mingxin Qi
- Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Yan Yang
- Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Chan Zhu
- Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Changming Wang
- Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Yuxiang Ma
- School of Life Science, China Pharmaceutical University, Nanjing, Jiangsu 210009, China.
| | - Zongxiang Tang
- Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China.
| | - Guang Yu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing 210023, China; Key Laboratory for Chinese Medicine of Prevention and Treatment in Neurological Diseases, School of Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China.
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Upadhaya P, Lamenza FF, Shrestha S, Roth P, Jagadeesha S, Pracha H, Horn NA, Oghumu S. Berry Extracts and Their Bioactive Compounds Mitigate LPS and DNFB-Mediated Dendritic Cell Activation and Induction of Antigen Specific T-Cell Effector Responses. Antioxidants (Basel) 2023; 12:1667. [PMID: 37759970 PMCID: PMC10525528 DOI: 10.3390/antiox12091667] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 08/08/2023] [Accepted: 08/22/2023] [Indexed: 09/29/2023] Open
Abstract
Berries have gained widespread recognition for their abundant natural antioxidant, anti-inflammatory, and immunomodulatory properties. However, there has been limited research conducted thus far to investigate the role of the active constituents of berries in alleviating contact hypersensitivity (CHS), the most prevalent occupational dermatological disease. Our study involved an ex vivo investigation aimed at evaluating the impact of black raspberry extract (BRB-E) and various natural compounds found in berries, such as protocatechuic acid (PCA), proanthocyanidins (PANT), ellagic acid (EA), and kaempferol (KMP), on mitigating the pathogenicity of CHS. We examined the efficacy of these natural compounds on the activation of dendritic cells (DCs) triggered by 2,4-dinitrofluorobenzene (DNFB) and lipopolysaccharide (LPS). Specifically, we measured the expression of activation markers CD40, CD80, CD83, and CD86 and the production of proinflammatory cytokines, including Interleukin (IL)-12, IL-6, TNF-α, and IL-10, to gain further insights. Potential mechanisms through which these phytochemicals could alleviate CHS were also investigated by investigating the role of phospho-ERK. Subsequently, DCs were co-cultured with T-cells specific to the OVA323-339 peptide to examine the specific T-cell effector responses resulting from these interactions. Our findings demonstrated that BRB-E, PCA, PANT, and EA, but not KMP, inhibited phosphorylation of ERK in LPS-activated DCs. At higher doses, EA significantly reduced expression of all the activation markers studied in DNFB- and LPS-stimulated DCs. All compounds tested reduced the level of IL-6 in DNFB-stimulated DCs in Flt3L as well as in GM-CSF-derived DCs. However, levels of IL-12 were reduced by all the tested compounds in LPS-stimulated Flt3L-derived BMDCs. PCA, PANT, EA, and KMP inhibited the activated DC-mediated Interferon (IFN)-γ and IL-17 production by T-cells. Interestingly, PANT, EA, and KMP significantly reduced T-cell proliferation and the associated IL-2 production. Our study provides evidence for differential effects of berry extracts and natural compounds on DNFB and LPS-activated DCs revealing potential novel approaches for mitigating CHS.
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Affiliation(s)
- Puja Upadhaya
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (P.U.); (F.F.L.); (S.S.); (P.R.); (S.J.); (H.P.); (N.A.H.)
| | - Felipe F. Lamenza
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (P.U.); (F.F.L.); (S.S.); (P.R.); (S.J.); (H.P.); (N.A.H.)
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA
| | - Suvekshya Shrestha
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (P.U.); (F.F.L.); (S.S.); (P.R.); (S.J.); (H.P.); (N.A.H.)
- Department of Microbiology, The Ohio State University, Columbus, OH 43210, USA
| | - Peyton Roth
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (P.U.); (F.F.L.); (S.S.); (P.R.); (S.J.); (H.P.); (N.A.H.)
| | - Sushmitha Jagadeesha
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (P.U.); (F.F.L.); (S.S.); (P.R.); (S.J.); (H.P.); (N.A.H.)
| | - Hasan Pracha
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (P.U.); (F.F.L.); (S.S.); (P.R.); (S.J.); (H.P.); (N.A.H.)
| | - Natalie A. Horn
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (P.U.); (F.F.L.); (S.S.); (P.R.); (S.J.); (H.P.); (N.A.H.)
| | - Steve Oghumu
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA; (P.U.); (F.F.L.); (S.S.); (P.R.); (S.J.); (H.P.); (N.A.H.)
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Sensory neuron-expressed TRPC3 mediates acute and chronic itch. Pain 2023; 164:98-110. [PMID: 35507377 DOI: 10.1097/j.pain.0000000000002668] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 04/20/2022] [Indexed: 01/09/2023]
Abstract
ABSTRACT Chronic pruritus is a prominent symptom of allergic contact dermatitis (ACD) and represents a huge unmet health problem. However, its underlying cellular and molecular mechanisms remain largely unexplored. TRPC3 is highly expressed in primary sensory neurons and has been implicated in peripheral sensitization induced by proinflammatory mediators. Yet, the role of TRPC3 in acute and chronic itch is still not well defined. Here, we show that, among mouse trigeminal ganglion (TG) neurons, Trpc3 mRNA is predominantly expressed in nonpeptidergic small diameter TG neurons of mice. Moreover, Trpc3 mRNA signal was present in most presumptively itch sensing neurons. TRPC3 agonism induced TG neuronal activation and acute nonhistaminergic itch-like and pain-like behaviors in naive mice. In addition, genetic deletion of Trpc3 attenuated acute itch evoked by certain common nonhistaminergic pruritogens, including endothelin-1 and SLIGRL-NH2. In a murine model of contact hypersensitivity (CHS), the Trpc3 mRNA expression level and function were upregulated in the TG after CHS. Pharmacological inhibition and global knockout of Trpc3 significantly alleviated spontaneous scratching behaviors without affecting concurrent cutaneous inflammation in the CHS model. Furthermore, conditional deletion of Trpc3 in primary sensory neurons but not in keratinocytes produced similar antipruritic effects in this model. These findings suggest that TRPC3 expressed in primary sensory neurons may contribute to acute and chronic itch through a histamine independent mechanism and that targeting neuronal TRPC3 might benefit the treatment of chronic itch associated with ACD and other inflammatory skin disorders.
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Yang H, Ming Y, Wang W, Jin Y, Hao Z, Liu G, Zhang D, Lin J. Anti-inflammatory and anti-pruritic effects of Chi-Huang Solution in a murine model of allergic contact dermatitis. JOURNAL OF ETHNOPHARMACOLOGY 2022; 298:115543. [PMID: 35870683 DOI: 10.1016/j.jep.2022.115543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/22/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE In treating atopic dermatitis, multi-mode management is adopted, including trying to avoid the allergens, controlling and preventing secondary infections, and using drugs to control itching. At present, most of the commonly used anti-pruritic drugs in the clinic are single-target and lead to serious side effects. Many studies have shown that a variety of traditional Chinese medicines have significant anti-inflammatory and anti-pruritic effects, and have the characteristics of multiple components, multiple targets, and multiple effects. AIM OF THE STUDY The study aimed to explore the anti-inflammatory and anti-pruritic effects of the Chi-Huang Solution in a murine model of Allergic contact dermatitis (ACD). This study considers the effectiveness of the Chi-Huang Solution for external use on skin to provide an experimental basis for the clinical development and application of Chinese medicine and related preparations for Canine atopic dermatitis (CAD). MATERIALS AND METHODS Forty-two male SPF C57BL/6 mice were randomly divided into control group (n = 6), ACD model group (n = 6), HAC control group (n = 6), and 4 Chi-Huang Solution groups (n = 6 in each group). With SADBE induce the murine model of ACD chronic pruritus, and initially evaluate whether the model is successful by counting scratching behavior, measuring the skin fold thickness and skin lesion score within 1 h. After treating the ACD model mice with deionized water, HAC, 1CH, 2CH, 3CH, and 4CH for 7 days, behavioral changes were used to evaluate the anti-pruritic effect. The skin fold thickness, skin lesion score, and spleen index were used to evaluate the anti-inflammatory effect of the Chi-Huang Solution. H.E. staining was used for the epidermal thickness measurement and pathological evaluation. RT-qPCR was used to analyze the mRNA expression of related inflammatory factors such as IL-1β, TNF-α, IL-33, IL-4, IL-17A, CXCL10, and its receptor CXCR3 in the skin of the lesion site, as well as to detect the mRNA expression of pruritus-related genes such as TRPV1, TRPA1, and GRP in DRG. RESULTS After the treatment of low-dose (0.1 g/mL) and medium-dose (0.2 g/mL) Chi-Huang Solution, the scratching times both decreased significantly (P < 0.05), meanwhile the medium-dose Chi-Huang Solution had an obvious effect on reducing scratches/scab score (P < 0.05). Moreover, no matter what dose it takes, all Chi-Huang Solution can alleviate the epidermal thickening (P < 0.05) and the infiltration of mast cells in the ACD murine model of ACD. It is worth mentioning that the count of mast cells in the dermis was significantly down-regulated after the treatment of medium-dose Chi-Huang Solution (P < 0.005). Furthermore, Chi-Huang Solution can significantly down-regulate the mRNA expression of related inflammatory factors in the skin, and reduce the mRNA expression of pruritus-related genes, such as TRPA1, TRPV1, and GRP in the spinal cord. CONCLUSIONS The results indicated that Chi-Huang Solution for external use exhibits significant anti-inflammatory and anti-pruritic effects on SADBE-induced ACD chronic pruritus murine models. Chi-Huang Solution might emerge as an effective drug for the treatment of CAD and high-dose Chi-Huang Solution (0.4 g/ml) has better comprehensive effects.
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Affiliation(s)
- Hsiaoyu Yang
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Yuexiang Ming
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Weihsin Wang
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Yipeng Jin
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Zhihui Hao
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China; Center of Research and Innovation of Chinese Traditional Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Gang Liu
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China
| | - Di Zhang
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China.
| | - Jiahao Lin
- College of Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China; Center of Research and Innovation of Chinese Traditional Veterinary Medicine, China Agricultural University, Beijing, 100193, PR China.
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Guo Y, Zhang BY, Peng YF, Chang LC, Li ZQ, Zhang XX, Zhang DJ. Mechanism of Action of Flavonoids of Oxytropis falcata on the Alleviation of Myocardial Ischemia–Reperfusion Injury. Molecules 2022; 27:molecules27051706. [PMID: 35268807 PMCID: PMC8911915 DOI: 10.3390/molecules27051706] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 03/04/2022] [Accepted: 03/04/2022] [Indexed: 11/16/2022] Open
Abstract
Oxytropis falcata Bunge is a plant used in traditional Tibetan medicine, with reported anti-inflammatory and antioxidants effects and alleviation of myocardial ischemia reperfusion injury (MIRI). However, the underlying mechanism against MIRI and the phytochemical composition of O. falcata are vague. One fraction named OFF1 with anti-MIRI activity was obtained from O. falcata, and the chemical constituents were identified by ultra-high-performance liquid chromatography coupled with tandem mass spectrometry (UHPLC–MS). The potential targets and signaling pathways involved in the action of O. falcata against MIRI were predicted by network pharmacology analysis, and its molecular mechanism on MIRI was determined by in vitro assays. The results revealed that flavonoids are the dominant constituents of OFF1. A total of 92 flavonoids reported in O. falcata targeted 213 potential MIRI-associated factors, including tumor necrosis factor (TNF), prostaglandin-endoperoxide synthase 2 (PTGS2), and the NF-κB signaling pathway. The in vitro assay on H9c2 cardiomyocytes subjected to hypoxia/reoxygenation injury confirmed that the flavonoids in OFF1 reduced myocardial marker levels, apoptotic rate, and the inflammatory response triggered by oxidative stress. Moreover, OFF1 attenuated MIRI by downregulating the ROS-mediated JNK/p38MAPK/NF-κB pathway. Collectively, these findings provide novel insights into the molecular mechanism of O. falcata in alleviating MIRI, being a potential therapeutic candidate.
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Affiliation(s)
- Yang Guo
- Research Center for High Altitude Medicine, Key Laboratory of High-Altitude Medicine (Ministry of Education), Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province (Qinghai-Utah Joint Research Key Lab for High Altitude Medicine), Qinghai University, Xining 810001, China; (Y.G.); (Z.-Q.L.)
| | - Ben-Yin Zhang
- College of Eco-Environmental Engineering, Qinghai University, Xining 810016, China; (B.-Y.Z.); (Y.-F.P.)
| | - Yan-Feng Peng
- College of Eco-Environmental Engineering, Qinghai University, Xining 810016, China; (B.-Y.Z.); (Y.-F.P.)
| | - Leng Chee Chang
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai’i, Hilo, HI 96720, USA;
| | - Zhan-Qiang Li
- Research Center for High Altitude Medicine, Key Laboratory of High-Altitude Medicine (Ministry of Education), Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province (Qinghai-Utah Joint Research Key Lab for High Altitude Medicine), Qinghai University, Xining 810001, China; (Y.G.); (Z.-Q.L.)
| | - Xin-Xin Zhang
- School of Pharmacy, Xi’an Jiaotong Univeristy, Xining 710061, China;
| | - De-Jun Zhang
- Research Center for High Altitude Medicine, Key Laboratory of High-Altitude Medicine (Ministry of Education), Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province (Qinghai-Utah Joint Research Key Lab for High Altitude Medicine), Qinghai University, Xining 810001, China; (Y.G.); (Z.-Q.L.)
- College of Eco-Environmental Engineering, Qinghai University, Xining 810016, China; (B.-Y.Z.); (Y.-F.P.)
- Correspondence: ; Tel.: +86-0971-5310586
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Li YJ, Chen YG, Chen J. Quantitative analysis, in vitro and in vivo permeability assays of toxic alkaloids in Qingpeng ointment using ultra performance liquid chromatography coupled with tandem mass spectrometry. J LIQ CHROMATOGR R T 2021. [DOI: 10.1080/10826076.2021.1990945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Yan-Jun Li
- School of Pharmacy, Lanzhou University, Lanzhou, P. R. China
| | - Yu-Gang Chen
- Lanzhou Second People’s Hospital, Lanzhou, P. R. China
| | - Juan Chen
- School of Pharmacy, Lanzhou University, Lanzhou, P. R. China
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Yang NJ, Liu YR, Tang ZS, Duan JA, Yan YF, Song ZX, Wang MG, Zhang YR, Chang BJ, Zhao ML, Zhao YT. Poria cum Radix Pini Rescues Barium Chloride-Induced Arrhythmia by Regulating the cGMP-PKG Signalling Pathway Involving ADORA1 in Zebrafish. Front Pharmacol 2021; 12:688746. [PMID: 34393777 PMCID: PMC8360851 DOI: 10.3389/fphar.2021.688746] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 07/19/2021] [Indexed: 11/15/2022] Open
Abstract
The traditional Chinese medicine Poria cum Radix Pini (PRP) is a fungal medicinal material that has been proven to play an important role in the treatment of arrhythmia. However, the mechanism of its effect on arrhythmia is still unclear. In this study, network pharmacology and metabolomics correlation analysis methods were used to determine the key targets, metabolites and potential pathways involved in the effects of PRP on arrhythmia. The results showed that PRP can significantly improve cardiac congestion, shorten the SV-BA interval and reduce the apoptosis of myocardial cells induced by barium chloride in zebrafish. By upregulating the expression of the ADORA1 protein and the levels of adenosine and cGMP metabolites in the cGMP-PKG signalling pathway, PRP can participate in ameliorating arrhythmia. Therefore, we believe that PRP shows great potential for the treatment of arrhythmia.
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Affiliation(s)
- Ning-Juan Yang
- Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, Shaanxi Collaborative Innovation Center Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Yan-Ru Liu
- Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, Shaanxi Collaborative Innovation Center Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Zhi-Shu Tang
- Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, Shaanxi Collaborative Innovation Center Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Jin-Ao Duan
- Key Laboratory for High Technology Research of TCM Formulae and Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing, China
| | - Ya-Feng Yan
- Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, Shaanxi Collaborative Innovation Center Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Zhong-Xing Song
- Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, Shaanxi Collaborative Innovation Center Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, China
| | | | - Yu-Ru Zhang
- Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, Shaanxi Collaborative Innovation Center Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Bai-Jin Chang
- Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, Shaanxi Collaborative Innovation Center Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, China.,Changchun University of Chinese Medicine, Changchun, China
| | - Meng-Li Zhao
- Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, Shaanxi Collaborative Innovation Center Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, China
| | - Yan-Ting Zhao
- Shaanxi Province Key Laboratory of New Drugs and Chinese Medicine Foundation Research, Shaanxi Collaborative Innovation Center Medicinal Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, China
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Zhang Q, Henry G, Chen Y. Emerging Role of Transient Receptor Potential Vanilloid 4 (TRPV4) Ion Channel in Acute and Chronic Itch. Int J Mol Sci 2021; 22:7591. [PMID: 34299208 PMCID: PMC8307539 DOI: 10.3390/ijms22147591] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/12/2021] [Accepted: 07/13/2021] [Indexed: 12/16/2022] Open
Abstract
Itch is a clinical problem that leaves many sufferers insufficiently treated, with over 20 million cases in the United States. This is due to incomplete understanding of its molecular, cellular, and cell-to-cell signaling mechanisms. Transient receptor potential (TRP) ion channels are involved in several sensory modalities including pain, vision, taste, olfaction, hearing, touch, and thermosensation, as well as itch. Relative to the extensive studies on TRPV1 and TRPA1 ion channels in itch modulation, TRPV4 has received relatively little research attention and its mechanisms have remained poorly understood until recently. TRPV4 is expressed in ganglion sensory neurons and a variety of skin cells. Growing evidence in the past few years strongly suggests that TRPV4 in these cells contributes to acute and chronic disease-associated itch. This review focuses on the current experimental evidence involving TRPV4 in itch under pathophysiological conditions and discusses its possible cellular and molecular mechanisms.
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Affiliation(s)
- Qiaojuan Zhang
- Department of Neurology, Duke University, Durham, NC 27710, USA; (Q.Z.); (G.H.)
| | - Gwendolyn Henry
- Department of Neurology, Duke University, Durham, NC 27710, USA; (Q.Z.); (G.H.)
| | - Yong Chen
- Department of Neurology, Duke University, Durham, NC 27710, USA; (Q.Z.); (G.H.)
- Department of Anesthesiology, Duke University, Durham, NC 27710, USA
- Department of Pathology, Duke University, Durham, NC 27710, USA
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Xu J, Xiong H, Zhao Z, Luo M, Ju Y, Yang G, Mei Z. Genistein suppresses allergic contact dermatitis through regulating the MAP2K2/ERK pathway. Food Funct 2021; 12:4556-4569. [PMID: 33908440 DOI: 10.1039/d0fo03238g] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Genistein is one of the main components of soybeans and has been reported to be a potential candidate for the treatment of obesity, cancer, osteoporosis and cardiovascular diseases. Recently, genistein has been shown to have therapeutic effects on some chronic skin diseases, but its underlying mechanisms remain unclear. In this study, we evaluated the role of genistein in alleviating squaric acid dibutylester (SADBE)-induced allergic contact dermatitis (ACD) in mice, and elucidated the potential molecular mechanisms in human keratinocyte (HaCaT) cell line. The impacts of genistein on the production of pro-inflammatory chemokines and cytokines including CXCL9, TSLP, TNF-α, IL-1β and IL-6 in the skin and serum of ACD mice were assessed, as well as the phosphorylation of components in the MAPK and JAK-STAT3 signaling pathways in the skin and dorsal root ganglions (DRGs). The results showed that genistein exerted protective effects on skin damage and inflammatory cell infiltration. Moreover, genistein significantly inhibited the increased expressions of pro-inflammatory factors in skin and peripheral blood, and down-regulated the levels of p-ERK, p-p38 and p-STAT3 in skin and DRGs. Furthermore, genistein inhibited the phosphorylation of ERK and STAT3 to downregulate the expression of cytokines and chemokines, and feedback downregulate phospho-p38 in TNF-α/IFN-γ-induced HaCaT cells. The genistein-mediated inhibitory effect on the MAPK pathway can be reversed by siMAP2K2 but not by siMAP2K4. Altogether, our findings demonstrated that genistein exhibits strong antipruritic and anti-inflammatory effects in ACD mice by inhibiting the production of pro-inflammatory cytokines and intracellular MAP2K2/ERK cell signaling, which makes genistein a potentially valuable candidate for the treatment of skin conditions and systemic syndromes in the setting of contact dermatitis.
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Affiliation(s)
- Jinhong Xu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China.
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Efficacy and Safety of Qingpeng Ointment for Subacute and Chronic Eczema: A Systematic Review and Meta-Analysis. BIOMED RESEARCH INTERNATIONAL 2021; 2021:5594953. [PMID: 33954181 PMCID: PMC8064792 DOI: 10.1155/2021/5594953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 03/07/2021] [Accepted: 03/27/2021] [Indexed: 11/18/2022]
Abstract
Objective To evaluate the efficacy and safety of Qingpeng ointment for the treatment of subacute and chronic eczema. Method Randomized controlled trials (RCTs) on Qingpeng ointment for subacute and chronic eczema were searched on PubMed, the Cochrane Library, Embase, Web of Science, China National Knowledge Infrastructure, Wanfang Database, Chinese Biomedical Literature Database, and Chinese Science and Technology Periodical Journal from their inception to 30 November 2020. Quality assessment and data analysis were performed by Review Manager 5.3. Results A total of 26 RCTs were included. Qingpeng ointment could significantly improve the total efficacy rate (TER) (RR = 2.60, 95% CI: 2.11 to 3.21, P < 0.00001), reduce the total symptom score (TSS) (SMD = -2.35, 95% CI: -3.74 to -0.97, P = 0.0009), and decrease visual analogue scale (VAS) for pruritus (MD = -3.86, 95% CI: -4.41 to -3.31, P < 0.00001) compared with the placebo. The TER of Qingpeng ointment was similar to that of topical corticosteroid (TCS) (RR = 0.96, 95% CI: 0.88 to 1.03, P = 0.25), and the TSSs between Qingpeng ointment and medium or low potency TCS were not significantly different (SMD = -0.05, 95% CI: -0.22 to 0.12, P = 0.54). However, Qingpeng ointment was not superior to TCS in reducing VAS score (SMD = 0.48, 95% CI: 0.00 to 0.96, P = 0.05). In addition, Qingpeng ointment combined with TCS performed better than TCS alone in all three outcomes. For safety, nothing but skin irritative reactions occurred in the Qingpeng ointment group, and its incidence of skin irritative reactions was similar to those of the placebo (RR = 1.47, 95% CI: 0.61 to 3.55, P = 0.40) and TCS (RR = 1.82, 95% CI: 0.79 to 4.22, P = 0.16). The combined therapy did not increase the risk of skin irritative reactions (RR = 0.69, 95% CI: 0.27 to 1.78, P = 0.44). Conclusion Qingpeng ointment is an effective and safe treatment for subacute and chronic eczema. It is also an add-on treatment to TCS for eczema. However, due to the suboptimal quality of the included studies, more large-sample and high-quality RCTs are needed to improve the evidence quality.
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Barry DM, Liu XT, Liu B, Liu XY, Gao F, Zeng X, Liu J, Yang Q, Wilhelm S, Yin J, Tao A, Chen ZF. Exploration of sensory and spinal neurons expressing gastrin-releasing peptide in itch and pain related behaviors. Nat Commun 2020; 11:1397. [PMID: 32170060 PMCID: PMC7070094 DOI: 10.1038/s41467-020-15230-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 02/27/2020] [Indexed: 12/12/2022] Open
Abstract
Gastrin-releasing peptide (GRP) functions as a neurotransmitter for non-histaminergic itch, but its site of action (sensory neurons vs spinal cord) remains controversial. To determine the role of GRP in sensory neurons, we generated a floxed Grp mouse line. We found that conditional knockout of Grp in sensory neurons results in attenuated non-histaminergic itch, without impairing histamine-induced itch. Using a Grp-Cre knock-in mouse line, we show that the upper epidermis of the skin is exclusively innervated by GRP fibers, whose activation via optogeneics and chemogenetics in the skin evokes itch- but not pain-related scratching or wiping behaviors. In contrast, intersectional genetic ablation of spinal Grp neurons does not affect itch nor pain transmission, demonstrating that spinal Grp neurons are dispensable for itch transmission. These data indicate that GRP is a neuropeptide in sensory neurons for non-histaminergic itch, and GRP sensory neurons are dedicated to itch transmission.
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Affiliation(s)
- Devin M Barry
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Xue-Ting Liu
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
- The Second Affiliated Hospital, The State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Sino-French Hoffmann Institute, Center for Immunology, Inflammation, Immune-mediated disease, Guangzhou Medical University, 510260, Guangzhou, Guangdong, P.R. China
| | - Benlong Liu
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Xian-Yu Liu
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Fang Gao
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Xiansi Zeng
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
- College of Life Sciences, Xinyang Normal University, 237 Nanhu Road, 464000, Xinyang, P. R. China
| | - Juan Liu
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Qianyi Yang
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Steven Wilhelm
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Jun Yin
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Ailin Tao
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA
- The Second Affiliated Hospital, The State Key Laboratory of Respiratory Disease, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Sino-French Hoffmann Institute, Center for Immunology, Inflammation, Immune-mediated disease, Guangzhou Medical University, 510260, Guangzhou, Guangdong, P.R. China
| | - Zhou-Feng Chen
- Center for the Study of Itch and Sensory Disorders, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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