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Ye Q, Zhou X, Ren H, Han F, Lin R, Li J. An overview of the past decade of bufalin in the treatment of refractory and drug-resistant cancers: current status, challenges, and future perspectives. Front Pharmacol 2023; 14:1274336. [PMID: 37860119 PMCID: PMC10582727 DOI: 10.3389/fphar.2023.1274336] [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: 08/08/2023] [Accepted: 09/25/2023] [Indexed: 10/21/2023] Open
Abstract
Profound progress has been made in cancer treatment in the past three decades. However, drug resistance remains prevalent and a critical challenge. Drug resistance can be attributed to oncogenes mutations, activated defensive mechanisms, ATP-bind cassette transporters overexpression, cancer stem cells, etc. Chinese traditional medicine toad venom has been used for centuries for different diseases, including resistant cancers. Bufalin is one of the bufadienolides in toad venom that has been extensively studied for its potential in refractory and drug-resistant cancer treatments in vitro and in vivo. In this work, we would like to critically review the progress made in the past decade (2013-2022) of bufalin in overcoming drug resistance in cancers. Generally, bufalin shows high potential in killing certain refractory and resistant cancer cells via multiple mechanisms. More importantly, bufalin can work as a chemo-sensitizer that enhances the sensitivity of certain conventional and targeted therapies at low concentrations. In addition, the development of bufalin derivatives was also briefly summarized and discussed. We also analyzed the obstacles and challenges and provided possible solutions for future perspectives. We hope that the collective information may help evoke more effort for more in-depth studies and evaluation of bufalin in both lab and possible clinical trials.
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Affiliation(s)
- Qingmei Ye
- Hainan General Hospital & Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, China
| | - Xin Zhou
- The Fifth People’s Hospital of Hainan Province & Affiliated Dermatology Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Han Ren
- Hainan General Hospital & Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Fangxuan Han
- Hainan General Hospital & Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Rong Lin
- Hubei Province Key Laboratory of Traditional Chinese Medicine Resource and Chemistry, Department of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
| | - Juan Li
- Hubei Province Key Laboratory of Traditional Chinese Medicine Resource and Chemistry, Department of Pharmacy, Hubei University of Chinese Medicine, Wuhan, Hubei, China
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2
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Ye Q, Zhou X, Han F, Zheng C. Toad venom-derived bufadienolides and their therapeutic application in prostate cancers: Current status and future directions. Front Chem 2023; 11:1137547. [PMID: 37007051 PMCID: PMC10060886 DOI: 10.3389/fchem.2023.1137547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 03/07/2023] [Indexed: 03/18/2023] Open
Abstract
Cancer is the second leading cause of death worldwide. Specially, the high incidence rate and prevalence of drug resistance have rendered prostate cancer (PCa) a great threat to men’s health. Novel modalities with different structures or mechanisms are in urgent need to overcome these two challenges. Traditional Chinese medicine toad venom-derived agents (TVAs) have shown to possess versatile bioactivities in treating certain diseases including PCa. In this work, we attempted to have an overview of bufadienolides, the major bioactive components in TVAs, in the treatment of PCa in the past decade, including their derivatives developed by medicinal chemists to antagonize certain drawbacks of bufadienolides such as innate toxic effect to normal cells. Generally, bufadienolides can effectively induce apoptosis and suppress PCa cells in-vitro and in-vivo, majorly mediated by regulating certain microRNAs/long non-coding RNAs, or by modulating key pro-survival and pro-metastasis players in PCa. Importantly, critical obstacles and challenges using TVAs will be discussed and possible solutions and future perspectives will also be presented in this review. Further in-depth studies are clearly needed to decipher the mechanisms, e.g., targets and pathways, toxic effects and fully reveal their application. The information collected in this work may help evoke more effects in developing bufadienolides as therapeutic agents in PCa.
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Affiliation(s)
- Qingmei Ye
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, China
- Hainan General Hospital & Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Xin Zhou
- The Fifth People’s Hospital of Hainan Province & Affiliated Dermatology Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Fangxuan Han
- Hainan General Hospital & Hainan Affiliated Hospital of Hainan Medical University, Haikou, Hainan, China
| | - Caijuan Zheng
- Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, Hainan, China
- *Correspondence: Caijuan Zheng,
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Song T, Li J, Wang M, Su M, Xu D, Zhou L, Zhang X, Wang H, Hou Y. Analysis of Resibufogenin on Cardiac conduction reveals a species difference in the cardiac electrophysiology: Rats versus guinea pigs. Biomed Pharmacother 2021; 139:111581. [PMID: 33895523 DOI: 10.1016/j.biopha.2021.111581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/31/2021] [Accepted: 04/02/2021] [Indexed: 11/29/2022] Open
Abstract
Resibufogenin (RBG) is a chemical ingredient of Chan Su. In our research, we found RBG affected cardiac rhythm in a negative chronotropic way in vivo. The cardiac Mapping system ex vivo and the patch clamp in vitro were used to explore how RBG influenced the cardiac electrophysiological properties. The negative chronotropic action of RBG at 100 μM might be attribute to prolongation in the atrioventricular conduction time and reduction in the ventricular conduction velocity. Using whole-cell patch clamp in ventricular myocytes of adult rats, we found that RBG prolonged the action potential duration (APD) in APD20, APD50, and APD90 at 100 μM and inhibited calcium currents (ICa), total outward potassium currents (IK), and transient outward potassium current (Ito) in a concentration-dependent manner, but not on the inward rectifying potassium current (IK1). Notably, RBG had a potent proarrhythmic action ex vivo in the isolated perfused guinea pig hearts at 10 μM, but not in rats. To avoid the potential cardiotoxicity derived from the distributional differences of ion channels among species, the effect of RGB on IKr in hERG-HEK293 cells was detected. The IC50 of RGB on IKr was more than 100 μM. In summary, all these results indicated that the negative chronotropic action of RBG relied on the blocking activities on multiple ion channels, and the species-difference of proarrhythmic effects might result from lack of the Ito on the myocardial membrane of guinea pigs. Anyhow, the cardiotoxicity observed in guinea pigs required further detailed studies to mitigate the potential risks in the clinical application of Chan Su.
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Affiliation(s)
- Tao Song
- Shijiazhuang Yiling Pharmaceutical Co., Ltd, No.238, the South of Tianshan street, Shijiazhuang 050035, Hebei, China
| | - Jiajia Li
- Department of Pharmacy, The Fourth Hospital of Shijiazhuang, No.16, the North of Tangu street, Shijiazhuang 050031, Hebei, China
| | - Mingye Wang
- College of Integrated Traditional Chinese and Western Medicine, Hebei Medical University of Chinese Medicine, No.3, Xingyuan Road, Shijiazhuang 050200, Hebei, China
| | - Min Su
- Shijiazhuang Yiling Pharmaceutical Co., Ltd, No.238, the South of Tianshan street, Shijiazhuang 050035, Hebei, China
| | - Dengfeng Xu
- Shijiazhuang Yiling Pharmaceutical Co., Ltd, No.238, the South of Tianshan street, Shijiazhuang 050035, Hebei, China
| | - Luheng Zhou
- Shijiazhuang Yiling Pharmaceutical Co., Ltd, No.238, the South of Tianshan street, Shijiazhuang 050035, Hebei, China
| | - Xiaopei Zhang
- Shijiazhuang Yiling Pharmaceutical Co., Ltd, No.238, the South of Tianshan street, Shijiazhuang 050035, Hebei, China
| | - Hongtao Wang
- Shijiazhuang Yiling Pharmaceutical Co., Ltd, No.238, the South of Tianshan street, Shijiazhuang 050035, Hebei, China
| | - Yunlong Hou
- National Key Laboratory of Collateral Disease Research and Innovative Chinese Medicine, No.238, the South of Tianshan street, Shijiazhuang 050035, Hebei, China; Shijiazhuang Compound Traditional Chinese Medicine Technology Innovation Center, No.238, the South of Tianshan street, Shijiazhuang 050035, Hebei, China; College of Integrated Traditional Chinese and Western Medicine, Hebei Medical University of Chinese Medicine, No.3, Xingyuan Road, Shijiazhuang 050200, Hebei, China.
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Li M, Wang XJ, Zhao Q, Wang JX, Xing HY, Zhang YZ, Zhang XX, Zhi YY, Li H, Ma J. Bufalin-induced cardiotoxicity: new findings into mechanisms. Chin J Nat Med 2020; 18:550-560. [PMID: 32616195 DOI: 10.1016/s1875-5364(20)30065-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Indexed: 12/20/2022]
Abstract
Bufalin is one of the main pharmacological and toxicological components of Venenum Bufonis and many traditional Chinese medicine preparations. The cardiotoxicity clearly limits its application to patients living in countries. Hence, an investigation of its toxicological mechanism is helpful for new drug development and treatment of the related clinical adverse reactions. We investigate the cardiotoxicity of bufalin using human induced pluripotent stem cells-derived cardiomyocytes (hiPSC-CMs) (0.003-0.1 μmol·L-1), human induced pluripotent stem cells-derived cardiomyocytes (hiPSC-CMs) (0.03-0.3 μmol·L-1) and eight human cardiac ion channel currents (0.01-100 μmol·L-1) combined with an impedance-based bioanalytical and patch clamp method. Biphasic effect of bufalin on the contractility in hiPSC-CMs, which has been shown to strengthen myocardial contractility, accelerate conduction, and increase beating rate at the earlier stage of administration, whereas weakened myocardial contractility, abolished conduction, and ceased beating rate at the later stage of administration. Bufalin decreased the action potential duration (Action potential duration at 30%, 50% and 90% repolarization), cardiac action potential amplitude, and maximal depolarization rate and depolarized the resting membrane potential of hiPSC-CMs. Spontaneous beating rates of hiPSC-CMs were markedly increased at 0.03 μmol·L-1, while were weakened at 0.3 μmol·L-1 after application. Bufalin blocks INav1.5 in a concentration-dependent manner with half maximal inhibitory concentration of 74.5 μmol·L-1. Bufalin respectively increased the late sodium current and Na+-Ca2+ exchange current with a concentration for 50% of maximal effect of 2.48 and 66.06 μmol·L-1 in hiPSC-CMs. Whereas, bufalin showed no significant effects on other cardiac ion channel currents. The enhancement of the late sodium current is one of the main mechanism for cardiotoxicity of bufalin.
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Affiliation(s)
- Min Li
- China State Institutes of Pharmaceutical Industry National Shanghai Center for New Drug Safety Evaluation and Research, Shanghai 201203, China; Shanghai InnoStar Bio-Tech Co., Ltd., Shanghai 201203, China
| | - Xi-Jie Wang
- China State Institutes of Pharmaceutical Industry National Shanghai Center for New Drug Safety Evaluation and Research, Shanghai 201203, China; Shanghai InnoStar Bio-Tech Co., Ltd., Shanghai 201203, China
| | - Qi Zhao
- China State Institutes of Pharmaceutical Industry National Shanghai Center for New Drug Safety Evaluation and Research, Shanghai 201203, China; Shanghai InnoStar Bio-Tech Co., Ltd., Shanghai 201203, China
| | - Jia-Xian Wang
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing 211100, China; Department of Research and Development, HELP Stem Cell Therapeutics, Nanjing 211100, China
| | - Hong-Yan Xing
- China State Institutes of Pharmaceutical Industry National Shanghai Center for New Drug Safety Evaluation and Research, Shanghai 201203, China; Shanghai InnoStar Bio-Tech Co., Ltd., Shanghai 201203, China
| | - Yi-Zhe Zhang
- China State Institutes of Pharmaceutical Industry National Shanghai Center for New Drug Safety Evaluation and Research, Shanghai 201203, China; Shanghai InnoStar Bio-Tech Co., Ltd., Shanghai 201203, China
| | - Xue-Xia Zhang
- China State Institutes of Pharmaceutical Industry National Shanghai Center for New Drug Safety Evaluation and Research, Shanghai 201203, China; Shanghai InnoStar Bio-Tech Co., Ltd., Shanghai 201203, China
| | - Yang-Yang Zhi
- China State Institutes of Pharmaceutical Industry National Shanghai Center for New Drug Safety Evaluation and Research, Shanghai 201203, China; Shanghai InnoStar Bio-Tech Co., Ltd., Shanghai 201203, China
| | - Hua Li
- China State Institutes of Pharmaceutical Industry National Shanghai Center for New Drug Safety Evaluation and Research, Shanghai 201203, China; Shanghai InnoStar Bio-Tech Co., Ltd., Shanghai 201203, China.
| | - Jing Ma
- China State Institutes of Pharmaceutical Industry National Shanghai Center for New Drug Safety Evaluation and Research, Shanghai 201203, China; Shanghai InnoStar Bio-Tech Co., Ltd., Shanghai 201203, China.
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Baldo MA, Cunha AOS, Godoy LD, Liberato JL, Yoneda JS, Fornari-Baldo EC, Ciancaglini P, dos Santos WF, Arantes EC. Assessment of neuropharmacological potential of low molecular weight components extracted from Rhinella schneideri toad poison. J Venom Anim Toxins Incl Trop Dis 2019; 25:e148418. [PMID: 31131006 PMCID: PMC6483406 DOI: 10.1590/1678-9199-jvatitd-1484-18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/23/2018] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Studies on toad poison are relevant since they are considered a good source of toxins that act on different biological systems. Among the molecules found in the toad poison, it can be highlighted the cardiotonic heterosides, which have a known mechanism that inhibit Na+/K+-ATPase enzyme. However, these poisons have many other molecules that may have important biological actions. Therefore, this work evaluated the action of the low molecular weight components from Rhinella schneideri toad poison on Na+/K+-ATPase and their anticonvulsive and / or neurotoxic effects, in order to detect molecules with actions of biotechnological interest. METHODS Rhinella schneideri toad (male and female) poison was collected by pressuring their parotoid glands and immediately dried and stored at -20 °C. The poison was dialysed and the water containing the low molecular mass molecules (< 8 kDa) that permeate the dialysis membrane was collected, frozen and lyophilized, resulting in the sample used in the assays, named low molecular weight fraction (LMWF). Na+/K+ ATPase was isolated from rabbit kidneys and enzyme activity assays performed by the quantification of phosphate released due to enzyme activity in the presence of LMWF (1.0; 10; 50 and 100 µg/mL) from Rhinella schneideri poison. Evaluation of the L-Glutamate (L-Glu) excitatory amino acid uptake in brain-cortical synaptosomes of Wistar rats was performed using [3H]L-glutamate and different concentration of LMWF (10-5 to 10 µg/µL). Anticonvulsant assays were performed using pentylenetetrazole (PTZ) and N-methyl-D-aspartate (NMDA) to induce seizures in Wistar rats (n= 6), which were cannulated in the lateral ventricle and treated with different concentration of LMWF (0.25; 0.5; 1.0; 2.0; 3.0 and 4.0 µg/µL) 15 min prior to the injection of the seizure agent. RESULTS LMWF induced a concentration-dependent inhibition of Na+/K+-ATPase (IC50% = 107.5 μg/mL). The poison induces an increased uptake of the amino acid L-glutamate in brain-cortical synaptosomes of Wistar rats. This increase in the L-glutamate uptake was observed mainly at the lowest concentrations tested (10-5 to 10-2 µg/µL). In addition, this fraction showed a very relevant central neuroprotection on seizures induced by PTZ and NMDA. CONCLUSIONS LMWF from Rhinella schneideri poison has low molecular weight compounds, which were able to inhibit Na+/K+-ATPase activity, increase the L-glutamate uptake and reduced seizures induced by PTZ and NMDA. These results showed that LMWF is a rich source of components with biological functions of high medical and scientific interest.
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Affiliation(s)
- Mateus Amaral Baldo
- Department of Physics and Chemistry, Ribeirão Preto College of
Pharmaceutical Science, University of São Paulo, Ribeirão Preto, SP, Brazil
- Health and Science Institute, Paulista University, São Paulo, SP,
Brazil
| | - Alexandra Olimpio Siqueira Cunha
- Neurobiology and Venoms Laboratory, Department of Biology, Faculty
of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo,
Ribeirão Preto, SP, Brazil
| | - Lívea Dornela Godoy
- Neurobiology and Venoms Laboratory, Department of Biology, Faculty
of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo,
Ribeirão Preto, SP, Brazil
- Institute of Neurosciences & Behavior - INeC, Campus USP,
Ribeirão Preto, SP, Brazil
| | - José Luiz Liberato
- Neurobiology and Venoms Laboratory, Department of Biology, Faculty
of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo,
Ribeirão Preto, SP, Brazil
- Institute of Neurosciences & Behavior - INeC, Campus USP,
Ribeirão Preto, SP, Brazil
| | - Juliana Sakamoto Yoneda
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters
at Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Elisa Correa Fornari-Baldo
- Department of Physics and Chemistry, Ribeirão Preto College of
Pharmaceutical Science, University of São Paulo, Ribeirão Preto, SP, Brazil
- Health and Science Institute, Paulista University, São Paulo, SP,
Brazil
| | - Pietro Ciancaglini
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters
at Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Wagner Ferreira dos Santos
- Neurobiology and Venoms Laboratory, Department of Biology, Faculty
of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo,
Ribeirão Preto, SP, Brazil
- Institute of Neurosciences & Behavior - INeC, Campus USP,
Ribeirão Preto, SP, Brazil
| | - Eliane Candiani Arantes
- Department of Physics and Chemistry, Ribeirão Preto College of
Pharmaceutical Science, University of São Paulo, Ribeirão Preto, SP, Brazil
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Ba X, Wang J, Zhou S, Luo X, Peng Y, Yang S, Hao Y, Jin G. Cinobufacini protects against paclitaxel-induced peripheral neuropathic pain and suppresses TRPV1 up-regulation and spinal astrocyte activation in rats. Biomed Pharmacother 2018; 108:76-84. [PMID: 30218861 DOI: 10.1016/j.biopha.2018.09.018] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 09/04/2018] [Accepted: 09/04/2018] [Indexed: 12/11/2022] Open
Abstract
Chemotherapy-induced peripheral neuropathic pain is a major limiting factor affecting cancer patients. No effective treatment is currently available. Cinobufacini, an aqueous extract from toad skin, is a widely used anti-cancer drug in China. Clinical evidence has demonstrated the safety and effectiveness of cinobufacini in combination with chemotherapy to promote the therapeutic efficacy while alleviating side effects, especially cancer-related pain symptoms. In this study, the effects of cinobufacini were investigated in a rat model of paclitaxel-induced peripheral neuropathic pain (PIPNP) to better understand and expand its clinical application. A single injection of cinobufacini (2.5 g/kg, i.p.) alleviated pre-established PIPNP, as indicated by decreased mechanical and thermal hypersensitivity compared with paclitaxel-treated rats. Repeated cinobufacini (1.25 and 2.5 g/kg, i.p.), given during the induction of PIPNP, prevented the establishment of paclitaxel-induced mechanical and thermal hypersensitivity. This preventative effect was associated with suppressed paclitaxel-induced TRPV1 up-regulation and spinal astrocyte activation, as well as decreased production of spinal TNF-α and IL-1β. These findings reveal cinobufacini as a therapeutic potential to treat and prevent paclitaxel-induced peripheral neuropathic pain.
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Affiliation(s)
- Xiyuan Ba
- School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, 518060, China; Department of Pain Medicine and Shenzhen Municipal Key Laboratory for Pain Medicine, Shenzhen Nanshan People's Hospital, 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Jiali Wang
- School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Shiyang Zhou
- School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Xinxin Luo
- School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Yun Peng
- School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Shimin Yang
- School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, 518060, China
| | - Yue Hao
- School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, 518060, China.
| | - Guangyi Jin
- School of Pharmaceutical Sciences, Health Science Center, Shenzhen University, Shenzhen, 518060, China
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Liang G, Chung T, Guo J, Zhang R, Xü W, Tzen JTC, Jiang R. Novel cinobufagin oxime ether derivatives as potential Na+/K+-ATPase inhibitors: Synthesis, biological screening and molecular docking. Chem Res Chin Univ 2017. [DOI: 10.1007/s40242-017-6487-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bi QR, Hou JJ, Qi P, Ma CH, Shen Y, Feng RH, Yan BP, Wang JW, Shi XJ, Zheng YY, Wu WY, Guo D. Venenum Bufonis induces rat neuroinflammation by activiating NF-κB pathway and attenuation of BDNF. JOURNAL OF ETHNOPHARMACOLOGY 2016; 186:103-110. [PMID: 27013094 DOI: 10.1016/j.jep.2016.03.049] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 02/27/2016] [Accepted: 03/20/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Venenum Bufonis (VB), also called toad venom, has been widely used in clinic as a cardiotonic, anohyne and antineoplastic agents both in China and other Asian countries. However, its neurotoxicity and cardiotoxicity limit its wide clinical application. Compared with extensive attention attracted with cardiotoxicity, the toxic effect of VB on Central Nervous System (CNS) is much less studied. AIM OF THE RESEARCH This study was performed to examine the neurotoxicity caused by VB on Sprague Dawley (SD) rats, then to clarify the mechanism in vivo by investigating its action on the neuroinflammation which possibly attributed to the activation of nuclear factor κB (NF-κB) pathway and the attenuation of brain-derived neurotrophic factor (BDNF). MATERIALS AND METHODS Rats administrated with 0.5% carboxymethyl cellulose sodium salt (CMC-Na) aqueous solution and VB (100mg/kg, 200mg/kg and 400mg/kg) were sacrificed at 2h, 4h, 6h, 8h, 24h and 48h. The brain level of neurotransmitters and their corresponding receptors, pro-inflammatory cytokines, BDNF/TrkB and NF-κB pathway-related proteins were examined, respectively. RESULTS VB administration induced severe neurologic damage and neuroinflammation, as indicated by the disordered 5-hydroxytryptamine (5-HT), dopamine (DA) and their corresponding receptors, together with the over production of inflammatory cytokines including interleukin-6 (IL-6), interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α). VB also notably promoted the expression of p-NF-κBp65, p-IκBα, p-IKKα and p-IKKβ and down-regulated the expression of BDNF and TrkB. CONCLUSION This study demonstrates that VB triggers neurotoxicity which probably is induced by neuroinflammation via activating of NF-κB pathway and attenuating the expression of BDNF.
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Affiliation(s)
- Qi-Rui Bi
- College of Traditional Chinese Medicine, China Pharmaceutical University, Nanjing 210009, China; Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Jin-Jun Hou
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Peng Qi
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Chun-Hua Ma
- College of Traditional Chinese Medicine, China Pharmaceutical University, Nanjing 210009, China.
| | - Yao Shen
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Rui-Hong Feng
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Bing-Peng Yan
- College of Traditional Chinese Medicine, China Pharmaceutical University, Nanjing 210009, China; Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Jian-Wei Wang
- College of Traditional Chinese Medicine, China Pharmaceutical University, Nanjing 210009, China; Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Xiao-Jian Shi
- College of Traditional Chinese Medicine, China Pharmaceutical University, Nanjing 210009, China; Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Yuan-Yuan Zheng
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Wan-Ying Wu
- Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
| | - Dean Guo
- College of Traditional Chinese Medicine, China Pharmaceutical University, Nanjing 210009, China; Shanghai Research Center for Modernization of Traditional Chinese Medicine, National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Haike Road 501, Shanghai 201203, China.
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9
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Wang ZJ, Sun L, Heinbockel T. Resibufogenin and cinobufagin activate central neurons through an ouabain-like action. PLoS One 2014; 9:e113272. [PMID: 25420080 PMCID: PMC4242513 DOI: 10.1371/journal.pone.0113272] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Accepted: 10/26/2014] [Indexed: 02/06/2023] Open
Abstract
Cinobufagin and resibufogenin are two major effective bufadienolides of Chan su (toad venom), which is a Chinese medicine obtained from the skin venom gland of toads and is used as a cardiotonic and central nervous system (CNS) respiratory agent, an analgesic and anesthetic, and as a remedy for ulcers. Many clinical cases showed that Chan su has severe side-effects on the CNS, causing shortness of breath, breathlessness, seizure, coma and cardiac arrhythmia. We used whole-cell recordings from brain slices to determine the effects of bufadienolides on excitability of a principal neuron in main olfactory bulb (MOB), mitral cells (MCs), and the cellular mechanism underlying the excitation. At higher concentrations, cinobufagin and resibufogenin induced irreversible over-excitation of MCs indicating a toxic effect. At lower concentrations, they concentration-dependently increased spontaneous firing rate, depolarized the membrane potential of MCs, and elicited inward currents. The excitatory effects were due to a direct action on MCs rather than an indirect phasic action. Bufadienolides and ouabain had similar effects on firing of MCs which suggested that bufadienolides activated neuron through a ouabain-like effect, most likely by inhibiting Na+/K+-ATPase. The direct action of bufadienolide on brain Na+ channels was tested by recordings from stably Nav1.2-transfected cells. Bufadienolides failed to make significant changes of the main properties of Nav1.2 channels in current amplitude, current-voltage (I-V) relationships, activation and inactivation. Our results suggest that inhibition of Na+/K+-ATPase may be involved in both the pharmacological and toxic effects of bufadienolide-evoked CNS excitation.
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Affiliation(s)
- Ze-Jun Wang
- Department of Anatomy, College of Medicine, Howard University, Washington, DC, United States of America
- * E-mail: (ZW); (TH)
| | - Liqin Sun
- Department of Anatomy, College of Medicine, Howard University, Washington, DC, United States of America
| | - Thomas Heinbockel
- Department of Anatomy, College of Medicine, Howard University, Washington, DC, United States of America
- * E-mail: (ZW); (TH)
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Inhibitory effect of cinobufagin on L-type Ca2+ currents, contractility, and Ca2+ homeostasis of isolated adult rat ventricular myocytes. ScientificWorldJournal 2014; 2014:496705. [PMID: 24977199 PMCID: PMC4058228 DOI: 10.1155/2014/496705] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 04/15/2014] [Accepted: 04/23/2014] [Indexed: 11/17/2022] Open
Abstract
Cinobufagin (CBG), a major bioactive ingredient of the bufanolide steroid compounds of Chan Su, has been widely used to treat coronary heart disease. At present, the effect of CBG on the L-type Ca(2+) current (I Ca-L) of ventricular myocytes remains undefined. The aim of the present study was to characterize the effect of CBG on intracellular Ca(2+) ([Ca(2+)]i) handling and cell contractility in rat ventricular myocytes. CBG was investigated by determining its influence on I Ca-L, Ca(2+) transient, and contractility in rat ventricular myocytes using the whole-cell patch-clamp technique and video-based edge-detection and dual-excitation fluorescence photomultiplier systems. The dose of CBG (10(-8) M) decreased the maximal inhibition of CBG by 47.93%. CBG reduced I Ca-L in a concentration-dependent manner with an IC50 of 4 × 10(-10) M, upshifted the current-voltage curve of I Ca-L, and shifted the activation and inactivation curves of I Ca-L leftward. Moreover, CBG diminished the amplitude of the cell shortening and Ca(2+) transients with a decrease in the time to peak (Tp) and the time to 50% of the baseline (Tr). CBG inhibited L-type Ca(2+) channels, and reduced [Ca(2+)]i and contractility in adult rat ventricular myocytes. These findings contribute to the understanding of the cardioprotective efficacy of CBG.
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