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Zuo Q, Xu DQ, Yue SJ, Fu RJ, Tang YP. Chemical Composition, Pharmacological Effects and Clinical Applications of Cinobufacini. Chin J Integr Med 2024; 30:366-378. [PMID: 38212503 DOI: 10.1007/s11655-024-3708-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2023] [Indexed: 01/13/2024]
Abstract
Chinese medicine cinobufacini is an extract from the dried skin of Bufo bufo gargarizans Cantor, with active ingredients of bufadienolides and indole alkaloids. With further research and clinical applications, it is found that cinobufacini alone or in combination with other therapeutic methods can play an anti-tumor role by controlling proliferation of tumor cells, promoting apoptosis, inhibiting formation of tumor neovascularization, reversing multidrug resistance, and regulating immune response; it also has the functions of relieving cancer pain and regulating immune function. In this paper, the chemical composition, pharmacological effects, clinical applications, and adverse reactions of cinobufacini are summarized. However, the extraction of monomer components of cinobufacini, the relationship between different mechanisms, and the causes of adverse reactions need to be further studied. Also, high-quality clinical studies should be conducted.
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Affiliation(s)
- Qian Zuo
- Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, Shaanxi University of Chinese Medicine, Xi'an, 712046, China
| | - Ding-Qiao Xu
- Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, Shaanxi University of Chinese Medicine, Xi'an, 712046, China
| | - Shi-Jun Yue
- Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, Shaanxi University of Chinese Medicine, Xi'an, 712046, China
| | - Rui-Jia Fu
- Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, Shaanxi University of Chinese Medicine, Xi'an, 712046, China
| | - Yu-Ping Tang
- Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility, Shaanxi University of Chinese Medicine, Xi'an, 712046, China.
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2
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Ye Q, Lin R, Chen Z, Li J, Zheng C. Isolation, Identification and Chemical Modification of Bufadienolides from Bufo melanostictus Schneider and Their Cytotoxic Activities against Prostate Cancer Cells. Molecules 2024; 29:1571. [PMID: 38611850 PMCID: PMC11013645 DOI: 10.3390/molecules29071571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/10/2024] [Accepted: 03/29/2024] [Indexed: 04/14/2024] Open
Abstract
The traditional Chinese medicine toad venom (Venenum bufonis) has been extensively used to treat various diseases, including cancers, in China and other Southeast Asian countries. The major constituents of toad venom, e.g., bufadienolides and alkaloids, exhibit broad-spectrum pharmacological effects in cancers. Herein, two new bufadienolides (1 and 2), along with eleven known compounds (3-13) were successfully isolated from Bufo melanostictus Schneider. Their structures were elucidated by extensive spectroscopic data and X-ray diffraction analysis. Furthermore, four lactam derivatives were synthesized through the transformation of bufadienolides lactones. The inhibitory effects of these compounds against human prostate cancer cell lines PC-3 and DU145 were evaluated. The outcomes indicated a notable trend, with a substantial subset displaying nanomolar range IC50 values against PC-3 and DU145 cells, underscoring their pronounced cytotoxicity. Moreover, a noteworthy distinction surfaces, wherein lactones consistently outperformed their lactam counterparts, further validating their heightened potency for the treatment of prostate cancer. This study contributes significant preclinical evidence substantiating the therapeutic viability of bufadienolides and toad venom as intervention strategies for prostate cancer.
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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 571158, China;
- Hainan General Hospital & Hainan Affiliated Hospital of Hainan Medical University, Haikou 570311, China
| | - Rong Lin
- Hubei Province Key Laboratory of Traditional Chinese Medicine Resource and Chemistry, Department of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China;
| | - Zeping Chen
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China;
| | - Juan Li
- Hubei Province Key Laboratory of Traditional Chinese Medicine Resource and Chemistry, Department of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, 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 571158, China;
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3
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Dong Q, Turdu G, Akber Aisa H, Yili A. Arenobufagin, isolated from Bufo viridis toad venom, inhibits A549 cells proliferation by inducing apoptosis and G2/M cell cycle arrest. Toxicon 2024; 240:107641. [PMID: 38331108 DOI: 10.1016/j.toxicon.2024.107641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/11/2024] [Accepted: 02/05/2024] [Indexed: 02/10/2024]
Abstract
Lung cancer is a significant contributor to cancer morbidity and mortality globally. Arenobufagin, a compound derived from Bufo viridis toad venom, has demonstrated the ability to inhibit cell growth in various cancer cell lines. However, our understanding of the role and mechanism of arenobufagin in lung cancer remains incomplete, necessitating further researches to fully elucidate its action mechanism. In this study, we further explored the impact of arenobufagin on A549 cells. The results revealed that it exerted a potent cytotoxic effect on A549 cells by inhibiting cell colony formation, promoting cell apoptosis, increasing reactive oxygen species (ROS) levels, and arresting A549 cells in G2/M phase. Collectively, our findings suggested that arenobufagin may have potential as a future therapeutic for lung cancer treatment.
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Affiliation(s)
- Qiang Dong
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi, 830011, People's Republic of China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Gulmira Turdu
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi, 830011, People's Republic of China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Haji Akber Aisa
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi, 830011, People's Republic of China
| | - Abulimiti Yili
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi, 830011, People's Republic of China.
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4
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Zhang H, Jian B, Kuang H. Pharmacological Effects of Cinobufagin. Med Sci Monit 2023; 29:e940889. [PMID: 37743616 PMCID: PMC10540643 DOI: 10.12659/msm.940889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 08/04/2023] [Indexed: 09/26/2023] Open
Abstract
Cinobufagin (CBF) is a bufadienolide, which is a major active ingredient of toad venom. In recent years, CBF has attracted increasing attention due to its highly potent and multiple pharmacological activities. To better understand the status of research on CBF, we collated recent studies on CBF to provide a valuable reference for clinical researchers and practitioners. According to reports, CBF exhibits extensive pharmacological properties, including antitumor, analgesic, cardioprotection, immunomodulatory, antifibrotic, antiviral, and antiprotozoal effects. Studies on the pharmacological activity of CBF have mainly focused on its anticancer activity. It has been demonstrated that CBF has a therapeutic effect on liver cancer, osteosarcoma, melanoma, colorectal cancer, acute promyelocytic leukemia, nasopharyngeal carcinoma, multiple myeloma, gastric cancer, and breast cancer. However, the direct molecular targets of CBF are currently unknown. In addition, there are few reports on toxicological and pharmacokinetic of CBF. Subsequent studies focusing on these aspects will help promote the development and application of CBF in clinical practice.
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Affiliation(s)
- Hao Zhang
- Key Laboratory of Basic and Application Research of Beiyao, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, Heilongjiang, PR China
| | - Baiyu Jian
- Institute of Polygenic Disease, Qiqihar Medical University, Qiqihar, Heilongjiang, PR China
| | - Haixue Kuang
- Key Laboratory of Basic and Application Research of Beiyao, Heilongjiang University of Chinese Medicine, Ministry of Education, Harbin, Heilongjiang, PR China
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Asrorov AM, Kayumov M, Mukhamedov N, Yashinov A, Mirakhmetova Z, Huang Y, Yili A, Aisa HA, Tashmukhamedov M, Salikhov S, Mirzaakhmedov S. Toad venom bufadienolides and bufotoxins: An updated review. Drug Dev Res 2023; 84:815-838. [PMID: 37154099 DOI: 10.1002/ddr.22072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/14/2023] [Accepted: 04/20/2023] [Indexed: 05/10/2023]
Abstract
Bufadienolides, naturally found in toad venoms having steroid-like structures, reveal antiproliferative effects at low doses. However, their application as anticancer drugs is strongly prevented by their Na+ /K+ -ATPase binding activities. Although several kinds of research were dedicated to moderating their Na+ /K+ -ATPase binding activity, still deeper fundamental knowledge is required to bring these findings into medical practice. In this work, we reviewed data related to anticancer activity of bufadienolides such as bufalin, arenobufagin, bufotalin, gamabufotalin, cinobufotalin, and cinobufagin and their derivatives. Bufotoxins, derivatives of bufadienolides containing polar molecules mainly belonging to argininyl residues, are reviewed as well. The established structures of bufotoxins have been compiled into a one-page figure to review their structures. We also highlighted advances in the structure-modification of the structure of compounds in this class. Drug delivery approaches to target these compounds to tumor cells were discussed in one section. The issues related to extraction, identification, and quantification are separated into another section.
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Affiliation(s)
- Akmal M Asrorov
- Institute of Bioorganic Chemistry of Uzbekistan Academy of Sciences, Tashkent, Uzbekistan
- Department of Natural Substances Chemistry, National University of Uzbekistan, Tashkent, Uzbekistan
- Shanghai Institute of Materia Medica, CAS, Shanghai, China
| | - Muzaffar Kayumov
- Institute of Bioorganic Chemistry of Uzbekistan Academy of Sciences, Tashkent, Uzbekistan
| | - Nurkhodja Mukhamedov
- Institute of Bioorganic Chemistry of Uzbekistan Academy of Sciences, Tashkent, Uzbekistan
| | - Ansor Yashinov
- Shanghai Institute of Materia Medica, CAS, Shanghai, China
- University of Chinese Academy of Sciences (UCAS), Beijing, China
| | - Ziyoda Mirakhmetova
- Institute of Bioorganic Chemistry of Uzbekistan Academy of Sciences, Tashkent, Uzbekistan
| | - Yongzhuo Huang
- Shanghai Institute of Materia Medica, CAS, Shanghai, China
- University of Chinese Academy of Sciences (UCAS), Beijing, China
| | - Abulimiti Yili
- Xinjiang Technical Institute of Physics and Chemistry, CAS, Urumqi, China
| | - Haji Akber Aisa
- Xinjiang Technical Institute of Physics and Chemistry, CAS, Urumqi, China
| | | | - Shavkat Salikhov
- Institute of Bioorganic Chemistry of Uzbekistan Academy of Sciences, Tashkent, Uzbekistan
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Xu Z, Bao J, Jin X, Li H, Fan K, Wu Z, Yao M, Zhang Y, Liu G, Wang D, Yu X, Guo J, Xu R, Gong Q, Wang F, Wang J. The Effects of Cinobufagin on Hepatocellular Carcinoma Cells Enhanced by MRT68921, an Autophagy Inhibitor. Am J Chin Med 2023; 51:1595-1611. [PMID: 37489112 DOI: 10.1142/s0192415x23500726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
Cinobufagin, a cardiotonic steroid derived from toad venom extracts, exhibits significant anticancer properties by inhibiting Na[Formula: see text]/K[Formula: see text]-ATPase in cancer cells. It is frequently used in clinical settings to treat advanced-stage cancer patients, improving their quality of life and survival time. However, its long-term use can result in multidrug resistance to other chemotherapy drugs, and the exact mechanism underlying this effect remains unknown. Therefore, this study explores the molecular mechanism underlying the anticancer effects of cinobufagin in hepatocellular carcinomas (HCCs), specifically in HepG2 and Huh-7 cells. As determined using transcriptome analysis, cinobufagin-triggered protective autophagy suppressed cell apoptosis in liver cancer HepG2 and Huh-7 cells by inhibiting the phosphoinositide-3-Kinase (PI3K)-AKT serine/threonine kinase (AKT)-mammalian target of rapamycin (mTOR) pathway. Cinobufagin-inhibited cell proliferation, induced apoptosis, and generated cell autophagy by upregulating the expression of MAP1 light chain 3 protein II, Beclin1, and autophagy-related protein 12-5. In addition, the autophagy inhibitor MRT68921 improved the antiproliferative and proapoptotic effects of cinobufagin in the studied cell lines. Overall, this study suggests that combining cinobufagin with an autophagy inhibitor can effectively treat HCC, providing a potential strategy for cancer therapy.
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Affiliation(s)
- Zhongwei Xu
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P. R. China
| | - Jun Bao
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P. R. China
| | - Xiaohan Jin
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P. R. China
| | - Heng Li
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P. R. China
| | - Kaiyuan Fan
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P. R. China
| | - Zhidong Wu
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P. R. China
| | - Min Yao
- Department of Internal Medicine, Tianjin Armed Police Corps Hospital, Tianjin 300126, P. R. China
| | - Yan Zhang
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P. R. China
| | - Gang Liu
- Xinjiang General Corps Hospital, Chinese People's Armed Police Force, Urumqi, Xinjiang 839001, P. R. China
| | - Dan Wang
- Xinjiang General Corps Hospital, Chinese People's Armed Police Force, Urumqi, Xinjiang 839001, P. R. China
| | - Xiaoping Yu
- Xinjiang General Corps Hospital, Chinese People's Armed Police Force, Urumqi, Xinjiang 839001, P. R. China
| | - Jia Guo
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P. R. China
| | - Ruicheng Xu
- Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P. R. China
| | - Qian Gong
- Department of Clinical Laboratory, Qingpu Branch of Zhongshan Hospital, Fudan University, Shanghai 201700, P. R. China
| | - Fengmei Wang
- Department of Gastroenterology and Hepatology, Tianjin Third Central Hospital, Tianjin 300170, P. R. China
| | - Jin Wang
- Department of Clinical Laboratory, Qingpu Branch of Zhongshan Hospital, Fudan University, Shanghai 201700, P. R. China
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Dong Q, Turdu G, Dongmulati N, Maimaitijang A, Aisa HA, Yili A. Bufadienolides from the Bufo viridis toad venom exert cytotoxic effects on cancer cells by inducing cell apoptosis and cell cycle arrest. Toxicol In Vitro 2023; 89:105566. [PMID: 36738868 DOI: 10.1016/j.tiv.2023.105566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/28/2022] [Accepted: 01/30/2023] [Indexed: 02/05/2023]
Abstract
A series of bufadienolides were isolated from the Bufo viridis toad venom, and their cytotoxic activities against three human cancer cell lines (HeLa, HT-29, MCF7) and a non-cancer cell line (L-O2) were explored using the MTT assay in vitro. All of nine compounds exhibited cytotoxic activities against the three cancer cell lines, with compound D4 exhibiting potent cytotoxic activity against HeLa cells and was better than positive control. Herein, we further evaluated the effect of compound D4 on HeLa cells. The results revealed that compound D4 has excellent cytotoxic effect on HeLa cells by inhibiting cell colony formation and migration, promoting cell apoptosis, increasing reactive oxygen species (ROS) levels and arresting of HeLa cells in S and G2/M phases. These findings encourage further work on the chemistry and bioactivity of the Bufo viridis toad venom.
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Affiliation(s)
- Qiang Dong
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi 830011, People's Republic of China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Gulmira Turdu
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi 830011, People's Republic of China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Naziermu Dongmulati
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi 830011, People's Republic of China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Ayitila Maimaitijang
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi 830011, People's Republic of China; University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049, People's Republic of China
| | - Haji Akber Aisa
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi 830011, People's Republic of China
| | - Abulimiti Yili
- State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, and the Key Laboratory of Chemistry of Plant Resources in Arid Regions Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi 830011, People's Republic of China.
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8
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Bian Y, Xue M, Guo X, Jiang W, Zhao Y, Zhang Z, Wang X, Hu Y, Zhang Q, Dun W, Zhang L. Cinobufagin induces acute promyelocytic leukaemia cell apoptosis and PML-RARA degradation in a caspase-dependent manner by inhibiting the β-catenin signalling pathway. Pharm Biol 2022; 60:1801-1811. [PMID: 36121296 PMCID: PMC9518602 DOI: 10.1080/13880209.2022.2118792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 07/27/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
CONTEXT Acute promyelocytic leukaemia (APL) is a malignant hematological tumour characterized by the presence of promyelocytic leukaemia-retinoic acid receptor A (PML-RARA) fusion protein. Cinobufagin (CBG) is one of the main effective components of toad venom with antitumor properties. However, only a few reports regarding the CBG treatment of APL are available. OBJECTIVE We explored the effect and mechanism of action of CBG on NB4 and NB4-R1 cells. MATERIALS AND METHODS We evaluated the viability of NB4 and NB4-R1 cells treated with 0, 20, 40, and 60 nM CBG for 12, 24, and 48 h. After treatment with CBG for 24 h, Bcl-2 associated X (Bax), B-cell lymphoma 2 (Bcl-2), β-catenin, cyclin D1, and c-myc expression was detected using western blotting and real-time polymerase chain reaction. Caspase-3 and PML-RARA expression levels were detected using western blotting. RESULTS CBG inhibited the viability of NB4 and NB4-R1 cells. The IC50 values of NB4 and NB4-R1 cells treated with CBG for 24 h were 45.2 nM and 37.9 nM, respectively. CBG induced NB4 and NB4-R1 cell apoptosis and PML-RARA degradation in a caspase-dependent manner and inhibited the β-catenin signalling pathway. DISCUSSION AND CONCLUSION CBG induced NB4 and NB4-R1 cell apoptosis and PML-RARA degradation in a caspase-dependent manner by inhibiting the β-catenin signalling pathway. This study proposes a novel treatment strategy for patients with APL, particularly those with ATRA-resistant APL.
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MESH Headings
- Humans
- Amphibian Venoms/pharmacology
- Apoptosis
- bcl-2-Associated X Protein
- beta Catenin
- Bufanolides
- Caspase 3
- Caspases
- Cyclin D1
- Leukemia, Promyelocytic, Acute/drug therapy
- Leukemia, Promyelocytic, Acute/metabolism
- Leukemia, Promyelocytic, Acute/pathology
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- Oncogene Proteins, Fusion/pharmacology
- Receptors, Retinoic Acid
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Affiliation(s)
- Yaoyao Bian
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Mei Xue
- College of Basic Medical Sciences, Institute of TCM-related Comorbid Depression, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xinlong Guo
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Wenjuan Jiang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Ye Zhao
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Zhaofeng Zhang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xian Wang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yongkang Hu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Qi Zhang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
| | - Wenliang Dun
- Department of Pharmacy, Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing, China
| | - Liang Zhang
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China
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9
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Liang P, Ma Y, Yang L, Mao L, Sun Q, Sun C, Liu Z, Mazhar M, Yang S, Ren W. Uncovering the Mechanisms of Active Components from Toad Venom against Hepatocellular Carcinoma Using Untargeted Metabolomics. Molecules 2022; 27:molecules27227758. [PMID: 36431859 PMCID: PMC9694973 DOI: 10.3390/molecules27227758] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 11/12/2022]
Abstract
Toad venom, a dried product of secretion from Bufo bufo gargarizans Cantor or Bufo melanostictus Schneider, has had the therapeutic effects of hepatocellular carcinoma confirmed. Bufalin and cinobufagin were considered as the two most representative antitumor active components in toad venom. However, the underlying mechanisms of this antitumor effect have not been fully implemented, especially the changes in endogenous small molecules after treatment. Therefore, this study was designed to explore the intrinsic mechanism on hepatocellular carcinoma after the cotreatment of bufalin and cinobufagin based on untargeted tumor metabolomics. Ultraperformance liquid chromatography with tandem mass spectrometry (UHPLC-MS/MS) was performed to identify the absorbed components of toad venom in rat plasma. In vitro experiments were determined to evaluate the therapeutic effects of bufalin and cinobufagin and screen the optimal ratio between them. An in vivo HepG2 tumor-bearing nude mice model was established, and a series of pharmacodynamic indicators were determined, including the body weight of mice, tumor volume, tumor weight, and histopathological examination of tumor. Further, the entire metabolic alterations in tumor after treating with bufalin and cinobufagin were also profiled by UHPLC-MS/MS. Twenty-seven active components from toad venom were absorbed in rat plasma. We found that the cotreatment of bufalin and cinobufagin exerted significant antitumor effects both in vitro and in vivo, which were reflected in inhibiting proliferation and inducing apoptosis of HepG2 cells and thereby causing cell necrosis. After cotherapy of bufalin and cinobufagin for twenty days, compared with the normal group, fifty-six endogenous metabolites were obviously changed on HepG2 tumor-bearing nude mice. Meanwhile, the abundance of α-linolenic acid and phenethylamine after the bufalin and cinobufagin intervention was significantly upregulated, which involved phenylalanine metabolism and α-linolenic acid metabolism. Furthermore, we noticed that amino acid metabolites were also altered in HepG2 tumor after drug intervention, such as norvaline and Leu-Ala. Taken together, the cotreatment of bufalin and cinobufagin has significant antitumor effects on HepG2 tumor-bearing nude mice. Our work demonstrated that the in-depth mechanism of antitumor activity was mainly through the regulation of phenylalanine metabolism and α-Linolenic acid metabolism.
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Affiliation(s)
- Pan Liang
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- State Key Laboratories for Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau 853, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
| | - Yining Ma
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
| | - Luyin Yang
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
| | - Linshen Mao
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
| | - Qin Sun
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
| | - Changzhen Sun
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
| | - Zengjin Liu
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
| | - Maryam Mazhar
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
| | - Sijin Yang
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- State Key Laboratories for Quality Research in Chinese Medicines, Faculty of Chinese Medicine, Macau University of Science and Technology, Macau 853, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
- Correspondence: (S.Y.); (W.R.)
| | - Wei Ren
- National Traditional Chinese Medicine Clinical Research Base, Drug Research Center of Integrated Traditional Chinese and Western Medicine, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, China
- Institute of Integrated Chinese and Western Medicine, Southwest Medical University, Luzhou 646000, China
- Correspondence: (S.Y.); (W.R.)
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Soumoy L, Ghanem GE, Saussez S, Journe F. Bufalin for an innovative therapeutic approach against cancer. Pharmacol Res 2022; 184:106442. [PMID: 36096424 DOI: 10.1016/j.phrs.2022.106442] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/30/2022] [Accepted: 09/07/2022] [Indexed: 11/19/2022]
Abstract
Bufalin is an endogenous cardiotonic steroid, first discovered in toad venom but also found in the plasma of healthy humans, with anti-tumour activities in different cancer types. The current review is focused on its mechanisms of action and highlights its very large spectrum of effects both in vitro and in vivo. All leads to the conclusion that bufalin mediates its effects by affecting all the hallmarks of cancer and seems restricted to cancer cells avoiding side effects. Bufalin decreases cancer cell proliferation by acting on the cell cycle and inducing different mechanisms of cell death including apoptosis, necroptosis, autophagy and senescence. Bufalin also moderates metastasis formation by blocking migration and invasion as well as angiogenesis and by inducing a phenotype switch towards differentiation and decreasing cancer cell stemness. Regarding its various mechanisms of action in cancer cells, bufalin blocks overactivated signalling pathways and modifies cell metabolism. Moreover, bufalin gained lately a huge interest in the field of drug resistance by both reversing various drug resistance mechanisms and affecting the immune microenvironment. Together, these data support bufalin as a quite promising new anti-cancer drug candidate.
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Affiliation(s)
- Laura Soumoy
- Laboratory of Human Anatomy & Experimental Oncology, Faculty of Medicine and Pharmacy, University of Mons (UMONS), 7000 Mons, Belgium.
| | - Ghanem E Ghanem
- Laboratory of Clinical and Experimental Oncology, Institut Jules Bordet, Université Libre de Bruxelles (ULB), 1000 Brussels, Belgium
| | - Sven Saussez
- Laboratory of Human Anatomy & Experimental Oncology, Faculty of Medicine and Pharmacy, University of Mons (UMONS), 7000 Mons, Belgium
| | - Fabrice Journe
- Laboratory of Human Anatomy & Experimental Oncology, Faculty of Medicine and Pharmacy, University of Mons (UMONS), 7000 Mons, Belgium; Laboratory of Clinical and Experimental Oncology, Institut Jules Bordet, Université Libre de Bruxelles (ULB), 1000 Brussels, Belgium.
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11
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Xu D, Wang J, Chen W, Yang X, Zhou J, Ma H, Di L, Duan J. Evaluation of analgesic and anti-inflammatory actions of indolealkylamines from toad venom in mice using lipidomics and molecular docking. J Ethnopharmacol 2021; 269:113677. [PMID: 33321188 DOI: 10.1016/j.jep.2020.113677] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/26/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Toad venom is one of widely used traditional Chinese medicines due to its analgesic and anti-inflammatory activities. However, hydrophilic alkaloids from toad venom, which may have certain pharmacological activities, have not been systematic studied. AIM OF THE STUDY The aim of the study was to identify the indolealkylamines (IAAs) from toad venom and investigate the analgesic and anti-inflammatory actions. MATERIALS AND METHODS The alkaloids were extracted and identified by high-resolution mass spectrometry. The analgesic abilities were determined using hot-plate test, formalin test and von Frey test. High-sensitivity lipidomics was used to investigate the regulatory function of IAAs on inflammatory eicosanoids. Besides, network pharmacology and molecular docking were used to demonstrate the candidate targets of IAAs. RESULTS 22 constituents have been characterized by high performance liquid chromatography (HPLC)-Triple TOF 5600, including six specific IAAs (serotonin, N-methyl serotonin, bufotenine, bufotenidine, bufothionine and dehydrobufotenine). Pharmacological studies showed that the IAAs from toad venom exerted significant analgesic activities at doses of 5, 15 and 45 mg/kg in vivo. Moreover, lipids analysis revealed IAAs might down-regulate inflammatory mediators from COX, LOX, DHA and LA pathways in formalin models, thus showing anti-inflammatory effect. The potent pharmacological function might because of the binding of IAAs and protein targets, such as sigma-1 receptor. CONCLUSION The studies provided a systemic evidence for the analgesic and anti-inflammatory activities of IAAs from toad venom. It suggested that IAAs might be a potential candidate to reduce inflammatory pain disorders.
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Affiliation(s)
- Dihui Xu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, And Jiangsu Key Laboratory for High Technology Research of TCM Formulae, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Jiaojiao Wang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, And Jiangsu Key Laboratory for High Technology Research of TCM Formulae, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Wuyue Chen
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, And Jiangsu Key Laboratory for High Technology Research of TCM Formulae, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Xinyi Yang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, And Jiangsu Key Laboratory for High Technology Research of TCM Formulae, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Jing Zhou
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, And Jiangsu Key Laboratory for High Technology Research of TCM Formulae, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Hongyue Ma
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, And Jiangsu Key Laboratory for High Technology Research of TCM Formulae, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Liuqing Di
- Jiangsu Engineering Research Center for Efficient Delivery System of TCM, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
| | - Jinao Duan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, And Jiangsu Key Laboratory for High Technology Research of TCM Formulae, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
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12
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Leal A, Karnopp E, Barreto YC, Oliveira RS, Rosa ME, Borges BT, Goulart FL, de Souza VQ, Laikowski MM, Moura S, Vinadé L, da Rocha JBT, Dal Belo CA. The Insecticidal Activity of Rhinella schneideri (Werner, 1894) Paratoid Secretion in Nauphoeta cinerea Cocroaches. Toxins (Basel) 2020; 12:toxins12100630. [PMID: 33019552 PMCID: PMC7601029 DOI: 10.3390/toxins12100630] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/21/2020] [Accepted: 08/26/2020] [Indexed: 12/17/2022] Open
Abstract
Rhinella schneideri is a common toad found in South America, whose paratoid toxic secretion has never been explored as an insecticide. In order to evaluate its insecticidal potential, Nauphoeta cinerea cockroaches were used as an experimental model in biochemical, physiological and behavioral procedures. Lethality assays with Rhinella schneideri paratoid secretion (RSPS) determined the LD50 value after 24 h (58.07µg/g) and 48 h exposure (44.07 µg/g) (R2 = 0.882 and 0.954, respectively). Acetylcholinesterase activity (AChE) after RSPS at its highest dose promoted an enzyme inhibition of 40%, a similar effect observed with neostigmine administration (p < 0.001, n= 5). Insect locomotion recordings revealed that RSPS decreased the distance traveled by up to 37% with a concomitant 85% increase in immobile episodes (p < 0.001, n = 36). RSPS added to in vivo cockroach semi-isolated heart preparation promoted an irreversible and dose dependent decrease in heart rate, showing a complete failure after 30 min recording (p < 0.001, n ≥ 6). In addition, RSPS into nerve-muscle preparations induced a dose-dependent neuromuscular blockade, reaching a total blockage at 70 min at the highest dose applied (p < 0.001, n ≥ 6). The effect of RSPS on spontaneous sensorial action potentials was characterized by an increase in the number of spikes 61% (p < 0.01). Meanwhile, there was 42% decrease in the mean area of those potentials (p < 0.05, n ≥ 6). The results obtained here highlight the potential insecticidal relevance of RSPS and its potential biotechnological application.
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Affiliation(s)
- Allan Leal
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica (PPGBTox), Universidade Federal de Santa Maria (UFSM), Avenida Roraima 1000, Santa Maria RS 97105-900, Brazil;
| | - Etiely Karnopp
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
| | - Yuri Correia Barreto
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
| | - Raquel Soares Oliveira
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
| | - Maria Eduarda Rosa
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
| | - Bruna Trindade Borges
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
| | - Flávia Luana Goulart
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
| | - Velci Queiróz de Souza
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
| | - Manuela Merlin Laikowski
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos, Instituto de Biotecnologia, Universidade de Caxias do Sul (UCS), Rua Francisco Getúlio Vargas 1130, Caxias do Sul RS 95070-560, Brazil; (M.M.L.); (S.M.)
| | - Sidnei Moura
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos, Instituto de Biotecnologia, Universidade de Caxias do Sul (UCS), Rua Francisco Getúlio Vargas 1130, Caxias do Sul RS 95070-560, Brazil; (M.M.L.); (S.M.)
| | - Lúcia Vinadé
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
| | - João Batista Teixeira da Rocha
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica (PPGBTox), Universidade Federal de Santa Maria (UFSM), Avenida Roraima 1000, Santa Maria RS 97105-900, Brazil;
| | - Cháriston André Dal Belo
- Laboratório de Neurobiologia e Toxinologia, LANETOX, Universidade Federal do Pampa, Campus São Gabriel, São Gabriel RS 97307-020, Brazil; (A.L.); (E.K.); (Y.C.B.); (R.S.O.); (M.E.R.); (B.T.B.); (F.L.G.); (V.Q.d.S.); (L.V.)
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica Toxicológica (PPGBTox), Universidade Federal de Santa Maria (UFSM), Avenida Roraima 1000, Santa Maria RS 97105-900, Brazil;
- Correspondence:
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13
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Abdelfatah S, Lu X, Schmeda-Hirschmann G, Efferth T. Cytotoxicity and antimitotic activity of Rhinella schneideri and Rhinella marina venoms. J Ethnopharmacol 2019; 242:112049. [PMID: 31265888 DOI: 10.1016/j.jep.2019.112049] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/24/2019] [Accepted: 06/28/2019] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Rhinella schneideri and Rhinella marina are toad venoms distributed in different parts of the world, including Brazil, Columbia and amazon. Venoms extracted from different species have many clinical applications such as antimicrobial cardiotonics and treatment of cancer. Aim of the study; In this study, we aim to investigate the effect of venoms extracted from R. schneideri and R. marina on cancer cells and verify possible mechanism of action. MATERIAL AND METHOD Cytotoxicity analyses was performed using the resazurin reduction assay, where different concentrations of venoms were tested against sensitive CCRF-CEM and P-gp overexpressing ADR/CEM5000 leukemia cells. Programmed cell death was investigated using the flow cytometric annexin V/propidium iodide apoptosis assay. Furthermore, we analyzed flow cytometric cell cycle analyses of CCRF-CEM cells. Effect on tubulin formation was tested using molecular docking and fluorescence microscopy of U2OS-GFP-α-tubulin osteosarcoma cells treated for 24 h with venoms. RESULTS Cytotoxicity assays revealed a strong activity towards wild-type CCRF-CEM cells (IC50 values of 0.202 ± 0.005 μg/ml and 0.18 ± 0.007 μg/ml for R. schneideri and R. marina, respectively) and multidrug-resistant CEM/ADR5000 cells (IC50 0.403 ± 0.084 μg/ml and 0.32 ± 0.077 μg/ml for R. schneideri and R. marina, respectively). The venoms induced apoptosis as major mechanism of cell death. The venoms induced strong G2/M cell arrest in CCRF-CEM cells. We suggested tubulin as a major target for the venoms. In silico molecular docking of the major constituents of the venoms, i.e. bufalin, marinobufagin, telocinbufagin, hellebrigenin, showed strong binding affinities to tubulin. This result was verified in vitro. The venoms dysregulated microtubule arrangement of U2OS cells expressing GFP-labeled tubulin. Toxicity predictions by QSAR methodology highlighted the toxic features of bufadienolides. CONCLUSION Our study demonstrated the importance of toad venoms as source of cytotoxic compounds that may serve as lead compounds for the development of novel anticancer drugs.
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Affiliation(s)
- Sara Abdelfatah
- Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, 55128, Germany.
| | - Xiaohua Lu
- Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, 55128, Germany.
| | - Guillermo Schmeda-Hirschmann
- Laboratorio de Química de Productos Naturales, Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, 3460000, Talca, Chile.
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Mainz, 55128, Germany.
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14
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Liu JS, Deng LJ, Tian HY, Ruan ZX, Cao HH, Ye WC, Zhang DM, Yu ZL. Anti-tumor effects and 3D-quantitative structure-activity relationship analysis of bufadienolides from toad venom. Fitoterapia 2019; 134:362-371. [PMID: 30872126 DOI: 10.1016/j.fitote.2019.03.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 12/14/2022]
Abstract
Toad venom (venenum bufonis, also called Chan'su) has been widely used for centuries in China to treat different diseases, especially for cancer. Bufadienolides are mainly responsible for the anti-cancer effects of toad venom. However, systematic chemical composition and cytotoxicity as well as key pharmacophores of these bufadienolides from toad venom have not yet been defined clearly. To enrich the understanding of the diversity of bufadienolides and to find bufadienolides with better activities from toad venom. This study was carried out to isolate chemical constituents, research their anti-tumor effects and mechanisms by MTT assay, flow cytometry and Western blotting, and develop a CoMFA and CoMSIA quantitative structure-activity relationship (QSAR) model for illustrating the vital relationship between the chemical structures and cytotoxicities. Among 47 natural bufadienolides, most of bufadienolides (21 compounds isolated in this study and 26 compounds isolated previously) could significantly inhibit the proliferation of cancer cells, and compounds 1, 8, 12, 18 and 19 showed the most potent inhibitory activity against four types of human tumor cells. Compound 18 induced G2/M cell cycle arrest and apoptosis. Moreover, 3D contour maps generated from CoMFA and CoMSIA identified several pharmacophores of bufadienolides responsible for the anti-tumor activities. Our study might provide reliable information for future structure modification and rational drug design of bufadienolides with anticancer activities in medical chemistry.
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Affiliation(s)
- Jun-Shan Liu
- Center for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Hong Kong, PR China; School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China
| | - Li-Juan Deng
- Formula-pattern Research Center, School of Traditional Chinese Medicine, Jinan University, Guangzhou 510632, PR China
| | - Hai-Yan Tian
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Zhi-Xiong Ruan
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, PR China
| | - Hui-Hui Cao
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, PR China
| | - Wen-Cai Ye
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China
| | - Dong-Mei Zhang
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, PR China.
| | - Zhi-Ling Yu
- Center for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Hong Kong, PR China.
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15
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Fitch RW, Snider BB, Zhou Q, Foxman BM, Pandya AA, Yakel JL, Olson TT, Al-Muhtasib N, Xiao Y, Welch KD, Panter KE. Absolute Configuration and Pharmacology of the Poison Frog Alkaloid Phantasmidine. J Nat Prod 2018; 81:1029-1035. [PMID: 29671588 PMCID: PMC7142328 DOI: 10.1021/acs.jnatprod.8b00062] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Phantasmidine, a rigid congener of the well-known nicotinic acetylcholine receptor agonist epibatidine, is found in the same species of poison frog ( Epipedobates anthonyi). Natural phantasmidine was found to be a 4:1 scalemic mixture, enriched in the (2a R,4a S,9a S) enantiomer by chiral-phase LC-MS comparison to the synthetic enantiomers whose absolute configurations were previously established by Mosher's amide analysis. The major enantiomer has the opposite S configuration at the benzylic carbon to natural epibatidine, whose benzylic carbon is R. Pharmacological characterization of the synthetic racemate and separated enantiomers established that phantasmidine is ∼10-fold less potent than epibatidine, but ∼100-fold more potent than nicotine in most receptors tested. Unlike epibatidine, phantasmidine is sharply enantioselective in its activity and the major natural enantiomer whose benzylic carbon has the 4a S configuration is more active. The stereoselective pharmacology of phantasmidine is ascribed to its rigid and asymmetric shape as compared to the nearly symmetric conformations previously suggested for epibatidine enantiomers. While phantasmidine itself is too toxic for direct therapeutic use, we believe it is a useful platform for the development of potent and selective nicotinic agonists, which may have value as pharmacological tools.
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Affiliation(s)
- Richard W Fitch
- Department of Chemistry and Physics , Indiana State University , Terre Haute , Indiana 47809 , United States
| | - Barry B Snider
- Department of Chemistry , Brandeis University MS 015 , Waltham , Massachusetts 02453 , United States
| | - Quan Zhou
- Department of Chemistry , Brandeis University MS 015 , Waltham , Massachusetts 02453 , United States
| | - Bruce M Foxman
- Department of Chemistry , Brandeis University MS 015 , Waltham , Massachusetts 02453 , United States
| | - Anshul A Pandya
- Neurobiology Laboratory , National Institute of Environmental Health Sciences, NIH/DHHS , Research Triangle Park , North Carolina 27709 , United States
| | - Jerrel L Yakel
- Neurobiology Laboratory , National Institute of Environmental Health Sciences, NIH/DHHS , Research Triangle Park , North Carolina 27709 , United States
| | - Thao T Olson
- Department of Pharmacology and Physiology , Georgetown University , Washington , D.C. 20057 , United States
| | - Nour Al-Muhtasib
- Department of Pharmacology and Physiology , Georgetown University , Washington , D.C. 20057 , United States
| | - Yingxian Xiao
- Department of Pharmacology and Physiology , Georgetown University , Washington , D.C. 20057 , United States
| | - Kevin D Welch
- Poisonous Plant Research Laboratory, United States Department of Agriculture , Agricultural Research Service , Logan , Utah 84341 , United States
| | - Kip E Panter
- Poisonous Plant Research Laboratory, United States Department of Agriculture , Agricultural Research Service , Logan , Utah 84341 , United States
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Schmeda-Hirschmann G, Gomez CV, Rojas de Arias A, Burgos-Edwards A, Alfonso J, Rolon M, Brusquetti F, Netto F, Urra FA, Cárdenas C. The Paraguayan Rhinella toad venom: Implications in the traditional medicine and proliferation of breast cancer cells. J Ethnopharmacol 2017; 199:106-118. [PMID: 28131913 DOI: 10.1016/j.jep.2017.01.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/20/2017] [Accepted: 01/23/2017] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Toads belonging to genus Rhinella are used in Paraguayan traditional medicine to treat cancer and skin infections. AIM OF THE STUDY The objective of the study was to determine the composition of venoms obtained from three different Paraguayan Rhinella species, to establish the constituents of a preparation sold in the capital city of Paraguay to treat cancer as containing the toad as ingredient, to establish the effect of the most active Rhinella schneideri venom on the cell cycle using human breast cancer cells and to assess the antiprotozoal activity of the venoms. METHODS The venom obtained from the toads parotid glands was analyzed by HPLC-MS-MS. The preparation sold in the capital city of Paraguay to treat cancer that is advertised as made using the toad was analyzed by HPLC-MS-MS. The effect of the R. schneideri venom and the preparation was investigated on human breast cancer cells. The antiprotozoal activity was evaluated on Leishmania braziliensis, L. infantum and murine macrophages. RESULTS From the venoms of R. ornata, R. schneideri and R. scitula, some 40 compounds were identified by spectroscopic and spectrometric means. Several minor constituents are reported for the first time. The preparation sold as made from the toad did not contained bufadienolides or compounds that can be associated with the toad but plant compounds, mainly phenolics and flavonoids. The venom showed activity on human breast cancer cells and modified the cell cycle proliferation. The antiprotozoal effect was higher for the R. schneideri venom and can be related to the composition and relative ratio of constituents compared with R. ornata and R. scitula. CONCLUSIONS The preparation sold in the capital city of Paraguay as containing the toad venom, used popularly to treat cancer did not contain the toad venom constituents. Consistent with this, this preparation was inactive on proliferation of human breast cancer cells. In contrast, the toad venoms of Rhinella species altered the cell cycle progression, affecting the proliferation of malignant cells. The findings suggest that care should be taken with the providers of the preparation and that the crude drug present a strong activity towards human breast cancer cell lines. The antiprotozoal effect of the R. schneideri venom was moderate while the venom of R. ornata was devoid of activity and that of R. scitula was active at very high concentration.
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Affiliation(s)
- Guillermo Schmeda-Hirschmann
- Laboratorio de Química de Productos Naturales, Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, 3460000 Talca, Chile.
| | - Celeste Vega Gomez
- Centro para el Desarrollo de la Investigación Científica (CEDIC), Manduvira 635 entre 15 de Agosto y O` Leary, Barrio La Encarnación, Código Postal: 1255, Asunción, Paraguay
| | - Antonieta Rojas de Arias
- Centro para el Desarrollo de la Investigación Científica (CEDIC), Manduvira 635 entre 15 de Agosto y O` Leary, Barrio La Encarnación, Código Postal: 1255, Asunción, Paraguay
| | - Alberto Burgos-Edwards
- Laboratorio de Química de Productos Naturales, Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, 3460000 Talca, Chile
| | - Jorge Alfonso
- Centro para el Desarrollo de la Investigación Científica (CEDIC), Manduvira 635 entre 15 de Agosto y O` Leary, Barrio La Encarnación, Código Postal: 1255, Asunción, Paraguay
| | - Miriam Rolon
- Centro para el Desarrollo de la Investigación Científica (CEDIC), Manduvira 635 entre 15 de Agosto y O` Leary, Barrio La Encarnación, Código Postal: 1255, Asunción, Paraguay
| | | | - Flavia Netto
- Instituto de Investigación Biológica del Paraguay, CP 1429 Asunción, Paraguay
| | - Félix A Urra
- Programa de Anatomía y Biología del Desarrollo, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile and Geroscience Center for Brain Health and Metabolism, Independencia 1027, Casilla 7, Santiago, Chile
| | - César Cárdenas
- Programa de Anatomía y Biología del Desarrollo, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile and Geroscience Center for Brain Health and Metabolism, Independencia 1027, Casilla 7, Santiago, Chile
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Wei X, Si N, Zhang Y, Zhao H, Yang J, Wang H, Wang L, Han L, Bian B. Evaluation of Bufadienolides as the Main Antitumor Components in Cinobufacin Injection for Liver and Gastric Cancer Therapy. PLoS One 2017; 12:e0169141. [PMID: 28081155 PMCID: PMC5231367 DOI: 10.1371/journal.pone.0169141] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 12/12/2016] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Cinobufacin injection, also known as huachansu, is a preparation form of Cinobufacini made from Cinobufacin extract liquid. Despite that Cinobufacin injection is shown to shrink liver and gastric tumors, improving patient survival and life quality, the effective components in Cinobufacin remain elusive. In this study, we aim to screen antitumor components from Cinobufacin injection to elucidate the most effective antitumor components for treatment of liver and gastric cancers. MATERIALS AND METHODS High performance liquid chromatography (HPLC) and LC-MS/MS analysis were used to separate and determine the components in Cinobufacin injection. Inhibition rates of various components in Cinobufacin injection on liver and gastric cancer cells were determined with MTT assay; Hepatocellular carcinoma and gastric cancer models were used to assess the antitumor effect of the compounds in vivo. RESULTS The major constituents in Cinobufacin injection include peptides, nucleic acids, tryptamines and bufotalins. MTT assay revealed that bufadienolides had the best antitumor activity, with peptides being the second most effective components. Bufadienolides showed significant inhibition rates on gastric and hepatocellular tumour growth in vivo. CONCLUSION Bufadienolides are the most effective components in Cinobufacini injection for the treatment of liver and gastric cancers. This discovery can greatly facilitate further research in improving the therapeutic effects of Cinobufacin injection, meanwhile reducing its adverse reaction.
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Affiliation(s)
- Xiaolu Wei
- Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences, Beijing, China
| | - Nan Si
- Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences, Beijing, China
| | - Yuefei Zhang
- China Resources Sanjiu Pharmaceutical Co., Ltd, Shenzhen, Guangdong Province, China
| | - Haiyu Zhao
- Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences, Beijing, China
| | - Jian Yang
- Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences, Beijing, China
| | - Hongjie Wang
- Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences, Beijing, China
| | - Lianmei Wang
- Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences, Beijing, China
| | - Linyu Han
- Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences, Beijing, China
| | - Baolin Bian
- Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences, Beijing, China
- * E-mail:
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Luo SL, Tian HY, Liu JS, Wang Y, Ye WC. A New C23 Steroid from the Venom of Bufo bufo gargarizans. Nat Prod Commun 2015; 10:1353-1354. [PMID: 26434114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023] Open
Abstract
A new C23 steroid, (3β,5β,14β)-methyl (3-hydroxy-14,15-epoxy-20-oxo-21-norcholan-24-oate) (1), together with four known ones (2-5), were isolated from the venom of Bufo bufo gargarizans. Their structures were elucidated on the basis of extensive spectroscopic analysis. The cytotoxicity of these compounds was also evaluated against human hepatocarcinoma HepG2 cells. Compound 3 showed significant cytotoxicity with an IC50 value of 16.8 +/- 0.7 μM.
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Wu Q, Lin WD, Liao GQ, Zhang LG, Wen SQ, Lin JY. Antiproliferative effects of cinobufacini on human hepatocellular carcinoma HepG2 cells detected by atomic force microscopy. World J Gastroenterol 2015; 21:854-861. [PMID: 25624718 PMCID: PMC4299337 DOI: 10.3748/wjg.v21.i3.854] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 07/30/2014] [Accepted: 09/19/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the antiproliferative activity of cinobufacini on human hepatocellular carcinoma HepG2 cells and the possible mechanism of its action.
METHODS: HepG2 cells were treated with different concentrations of cinobufacini. Cell viability was measured by methylthiazolyl tetrazolium (MTT) assay. Cell cycle distribution was analyzed by flow cytometry (FCM). Cytoskeletal and nuclear alterations were observed by fluorescein isothiocyanate-phalloidin and DAPI staining under a laser scanning confocal microscope. Changes in morphology and ultrastructure of cells were detected by atomic force microscopy (AFM) at the nanoscale level.
RESULTS: MTT assay indicated that cinobufacini significantly inhibited the viability of HepG2 cells in a dose-dependent manner. With the concentration of cinobufacini increasing from 0 to 0.10 mg/mL, the cell viability decreased from 74.9% ± 2.7% to 49.41% ± 2.2% and 39.24% ± 2.1% (P < 0.05). FCM analysis demonstrated cell cycle arrest at S phase induced by cinobufacini. The immunofluorescence studies of cytoskeletal and nuclear morphology showed that after cinobufacini treatment, the regular reorganization of actin filaments in HepG2 cells become chaotic, while the nuclei were not damaged seriously. Additionally, high-resolution AFM imaging revealed that cell morphology and ultrastructure changed a lot after treatment with cinobufacini. It appeared as significant shrinkage and deep pores in the cell membrane, with larger particles and a rougher cell surface.
CONCLUSION: Cinobufacini inhibits the viability of HepG2 cells via cytoskeletal destruction and cell membrane toxicity.
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20
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Krylov VN, Deriugina AV, Konstantinova AI. [Electrophoretic mobility and activity Na,K-ATPase of erytheocytes in rats under stress]. Ross Fiziol Zh Im I M Sechenova 2014; 100:1297-1302. [PMID: 25665408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this paper, we study the relation between the electrophoretic mobility of erythrocytes (EPME) and the activity of Na,K-ATPase of erythrocytes under the action of different types of stress factors (immobilization, hypoxia, radiation exposure), as well as the introduction of stress implementing agents (adrenaline, cortisol, bee and toad venom) rats. Activity of Na,K-ATPase and the change of EPME washed erythrocytes were examined through 15, 120 min and 24 hours after exposure. Found that at the initial stage (15 min after a stress-exposure) decrease of EPME associated with increased enzyme activity and further increase of EPME takes place on the background of the decrease of activity of Na,K-ATPase in all types of alterations, except the actions toad venom and cortisol. Toad venom and cortisol led to reduced activity of Na,K-ATPase and increase of EPME.
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Tian HY, Luo SL, Liu JS, Wang L, Wang Y, Zhang DM, Zhang XQ, Jiang RW, Ye WC. C23 steroids from the venom of Bufo bufo gargarizans. J Nat Prod 2013; 76:1842-1847. [PMID: 24050254 DOI: 10.1021/np400174f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Five new C23 steroids (1-5) together with five known bufadienolides (6-10) were isolated from the venom of Bufo bufo gargarizans (ChanSu in Chinese). The structures of the new steroids were elucidated by extensive spectroscopic methods in combination with X-ray diffraction analysis. Among these C23 steroids, only compound 3 showed cytotoxicities against HepG2 and A549 cancer cells, with respective IC50 values of 26.8 ± 8.3 and 45.6 ± 2.5 μM. In contrast, the bufadienolides (7-10) displayed potent inhibitory activities against these cancer cells, with respective IC50 values in the ranges 0.5-5.5 and 0.6-6.5 μM, but relatively less cytotoxicity on normal mouse spleen cells. In addition, the Na(+)/K(+)-ATPase inhibitory activities of 2, 5, and 7 revealed that the lactone moiety of a bufadienolide was important for the inhibitory activity.
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Affiliation(s)
- Hai-Yan Tian
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University , Guangzhou 510632, People's Republic of China
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22
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Zhang SJ, Zhang YT, Zhao JH, Shen LN, Shi F, Feng NP. Preparation and in vitro anti-tumor properties of toad venom extract-loaded solid lipid nanoparticles. Pharmazie 2013; 68:653-660. [PMID: 24020119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this study, we prepared solid lipid nanoparticles (TV-SLNs) loaded with toad venom extract and investigated their anti-tumor effects in vitro in HeLa and SKOV-3 cells. TV-SLNs were prepared using a cold homogenization technique, and the formulation was optimized by central composite design and response surface methods. The anti-tumor activities of TV-SLNs were evaluated by analyzing cell division and cell cycle distribution by using the MTT assay and flow cytometry. After incubation with TV-SLNs, the growth of both HeLa and SKOV-3 cells was inhibited significantly. The percentage of HeLa cells in G0/G1 phase decreased, whereas that in the S and G2/M phases increased. Thus, the S and G2/M phases were blocked after the incubation of HeLa cells with TV-SLNs for 24 h. In contrast, the percentage of SKOV-3 cells in G0/G1 phase increased and then decreased in S and G2/M phases, with the G0/G1 phase being blocked after incubation with TV-SLNs for 24 h. Our results demonstrate that TV-SLNs inhibited the fissiparism of HeLa and SKOV-3 cells in a time-and dose-dependent manner. TV-SLNs may be effective as a novel TV vaginal delivery system for the treatment of cervical and ovarian cancers.
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Affiliation(s)
- Su-Juan Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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23
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Kucińska M, Ruciński P, Murias M. [Quod medicina aliis, aliis est acre venenum**--venoms as a source of anticancer agents]. Przegl Lek 2013; 70:652-656. [PMID: 24466712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Natural product derived from plants and animals were used in folk medicine for centuries. The venoms produced by animals for hunting of self-defence are rich in bioactive compounds with broad spectrum of biological activity. The papers presents the most promising compounds isolated from venoms of snakes, scorpions and toads. For these compounds both: mechanism of anticancer activity as well as possibilities of clinical use are presented.
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Affiliation(s)
| | - Piotr Ruciński
- Katedra i Zakład Toksykologii, Uniwersytet Medyczny w Poznaniu
| | - Marek Murias
- Katedra i Zakład Toksykologii, Uniwersytet Medyczny w Poznaniu
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Abstract
Workers of the ant Carebarella bicolor collected in Panama were found to have two major poison-frog alkaloids, cis- and trans-fused decahydroquinolines (DHQs) of the 269AB type, four minor 269AB isomers, two minor 269B isomers, and three isomers of DHQ 271D. For the first time in an ant, however, the DHQs were accompanied by six histrionicotoxins (HTXs), viz., 283A, 285A, 285B, 285C, 287A, and 287D. This co-occurrence of the HTX and DHQ alkaloids is the usual pattern seen in dendrobatid frogs. This finding contrasts with our earlier study, where workers of a Brazilian ant, Solenopsis (Diplorhoptrum) sp., were found to have a very similar DHQ complex but failed to show HTXs. Several new DHQ alkaloids of MW 271 (named in the frog as 271G) are reported from the above ants that have both m/z 202 and 204 as major fragment ions, unlike the spectrum seen for the poison-frog alkaloid 271D, which has only an m/z 204 base peak. Found also for the first time in skin extracts from the comparison frog Oophaga granulifera of Costa Rica is a trace DHQ of MW 273. It is coded as 273F in the frog; a different isomer is found in the ant.
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Affiliation(s)
- Tappey H Jones
- Department of Chemistry, Virginia Military Institute , Lexington, Virginia 24450, United States
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Xie RF, Li ZC, Gao B, Shi ZN, Zhou X. Bufothionine, a possible effective component in cinobufocini injection for hepatocellular carcinoma. J Ethnopharmacol 2012; 141:692-700. [PMID: 22210051 DOI: 10.1016/j.jep.2011.12.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 12/07/2011] [Accepted: 12/13/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Cinobufacini has been traditionally used in China for the treatment of tumor since hundreds years ago. For recent years, its modern preparation,cinobifucini injection has also obtained satisfactory therapeutic functions for cancer. MATERIALS AND METHODS High performance liquid chromatography (HPLC) analysis was applied to determine the content of cinobufagin, resibufogenin and bufothionine in cinobufacin extract liquid and injection; MTT assay and flow cytometric analysis were also respectively used to study the effect of cinobufacini extract liquid, injection and three chemical structures on cells and cell cycles. RESULTS HPLC results demonstrated that in cinobufacini extract liquid three ingredients (cinobufagin, resibufogenin and bufothionine) were all monitored while in cinofacini injection only bufothinone was detected; MTT assays showed bufothionine could obviously inhibit the proliferation of human hepatocellular carcinoma cell lines such as SMMC-7721 and BEL-7402 in a dose- and time-dependent manner as well as cinobufagin and resibufogenin; further flow cytometric analysis indicated obvious increases in G2/M phase and decrease in G0/G1 phase when SMMC-7721 cell line exposure to bufothionine (480 μg/ml). CONCLUSIONS These results suggested bufothionine could be involved in treatment of human cancer for cinobufacini injection and the mechanism might be relative to induce G2/M phase cell cycle arrest.
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Affiliation(s)
- Rui-Fang Xie
- Department of Pharmacy, Longhua Hospital affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, PR China
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26
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Xiong X, Zhou YD. [Mechanisms of Chansu Injection in reversing multidrug resistance of HL60/ADM cells]. Nan Fang Yi Ke Da Xue Xue Bao 2012; 32:337-340. [PMID: 22445978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To investigate the mechanisms underlying the effect of Chansu Injection (CHS) in reversing multi-drug resistance (MDR) of HL60/ADM cells. METHODS MTT assay was used to investigate the effect of CHS on adramycin (ADM) sensitivity of HL-60/ADM cells. Flow cytometry was used to observe the effect of CHS on the cell cycle of HL60/ADM cell. The expressions of NF-κB, MRP, GST-π, and iNOS were detected by immunocytochemistry. RESULTS Treatment with CHS lowered the IC(50) of ADM in HL60/ADM cells from 34.1971 µmol/L to 17.4393 µmol/L, and caused an increase in G(0)/G1 and G(2)/M phase cells with decreased S phase cells. CHS decreased the expressions of MRP mRNA and GST-π and MRP proteins but increased the expressions of iNOS and NF-κB proteins in the cells. CONCLUSION CHS can partly reverse MDR in HL60/ADM cells possibly by down-regulating MRP and GST-π, up-regulating NF-κB and iNOS, and promoting cell apoptosis, thereby increase ADM sensitivity of HL-60/ADM cells.
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Affiliation(s)
- Xin Xiong
- Laboratory Research Center, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.
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Wang L, Raju U, Milas L, Molkentine D, Zhang Z, Yang P, Cohen L, Meng Z, Liao Z. Huachansu, containing cardiac glycosides, enhances radiosensitivity of human lung cancer cells. Anticancer Res 2011; 31:2141-2148. [PMID: 21737634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
AIM To assess radiosensitzing potential of huachansu (HCS) and delineate the underlying mechanisms. MATERIALS AND METHODS Lung cancer cell lines were exposed to HCS, radiation or both and subjected to survival assays, Western blots, apoptosis assay and immunocytochemical analysis. RESULTS HCS suppressed the viability of all three lung lines tested and enhanced radiosensitivity of H460 and A549 (wild-type p53) only with no effect on H1299 (p53 null) cells. HCS prolonged the presence of radiation-induced γH2AX foci and increased radiation-induced apoptosis. Western blots showed that HCS increased cleaved caspase-3 and cleaved poly-(ADP-ribose) polymerase (PARP) levels, as well as reducing BCL-2 and p53 protein levels in H460 cells. CONCLUSION HCS-enhanced radiosensitivity of human lung cancer lines appeared to be p53-dependent. Inhibition of DNA repair and increase in radiation-induced apoptosis may have served as underlying mechanisms. These data suggest that HCS may have potential to improve the efficacy of radiotherapy.
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Affiliation(s)
- Li Wang
- Department of Experimental Radiation Oncology, Unit 97, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
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Wang XL, Zhao GH, Zhang J, Shi QY, Guo WX, Tian XL, Qiu JZ, Yin LZ, Deng XM, Song Y. Immunomodulatory effects of cinobufagin isolated from Chan Su on activation and cytokines secretion of immunocyte in vitro. J Asian Nat Prod Res 2011; 13:383-392. [PMID: 21534035 DOI: 10.1080/10286020.2011.565746] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The objective of this study was to evaluate the immunomodulatory effects of cinobufagin (CBG) isolated from Chan Su (Venenum Bufonis) in vitro. In this paper, our results show that CBG significantly stimulated cell proliferation of splenocytes and peritoneal macrophages (PMΦ) and markedly enhanced the phagocytic activation of PMΦ. CBG also significantly increased CD4(+)CD8(+) double-positive T-cell populations and the percentage of S-phase cells of splenic lymphocytes. The levels of several Th1 cytokines, including interferon-γ and tumor necrosis factor-α, are significantly increased after CBG treatment, whereas the levels of the Th2 cytokine interleukin-4 and interleukin-10 are significantly decreased. As a result, the ratio of Th1/Th2 also increased. Taken together, these results indicated that CBG had potential immune system regulatory effects and suggested that this compound could be developed as a novel immunotherapeutic agent to treat immune-mediated diseases such as cancer.
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Affiliation(s)
- Xiao-Liang Wang
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun, China
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Liu L, Chen BA, Qin SK. [Anti-angiogenesis effect of arsenic trioxide plus cinobufacin on human hepatocarcinoma transplantation model nude mice]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2011; 31:67-72. [PMID: 21434348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To study the anti-angiogenesis effect and toxicity of arsenic trioxide (As2O3) plus cinobufacin on transplanted human hepatocarcinoma in nude mice, and the acting mechanism of the treatment was explored as well. METHODS Human hepatocarcinoma was transplanted in nude mouse, and the modeled mice were divided at random into 4 groups, 8 in each group. They were treated respectively with normal saline (GA), 2.5 mg/kg As2O3 (GB), 5 mL/kg cinobufacin (GC) and 2.5 mg/kg As2O3 + 5 mL/kg cinobufacin (GD), by intraperitoneal injection for 21 days. The anti-tumor effects was evaluated by estimating general condition of nude mice, tumor size, microvessel density(MVD) level. Expressions of vascular endothelial growth factor (VEGF) and epidermal growth factor receptor (EGFR) in tumor, in tumor tissue of mice as well as pathology of tumor were detected by immunohistochemistry assay, optical microscope, transmission electron microscope (TEM), respectively. Moreover, blood routine and pathological examinations of liver and kidney were performed. RESULTS The tumor weight and volume were 0.65 +/- 0.25 g and 0.44 +/- 0.14 cm3 in GB, 0.70 +/- 0.27 g and 0.46 +/- 0.19 cm3 in GC, 0.42 +/- 0.16 g and 0.26 +/- 0.11 cm3 in GD, all significantly lower than those in GA (1.06 +/- 0.25 g and 0.67 +/- 0.17 cm3, P < 0.05). The coefficient of drug interaction (CDI) on tumor weight was 0.97 and that on tumor size was 0.86, all less than 1, showing the synergistic action between the two drugs. Expressions of VEGF and EGFR in tumor as well as the MVD were decreased in GB and GC, and the decreasing of these indices were even more significant in GD. Pathologic examination showed the growth of tumor in GB, GC and GD were all inhibited significantly. No obvious toxicity of the treatments to the hepatic, renal and hematopoietic systems in the nude mice was observed. CONCLUSIONS As2O3 and cinobufacini showed synergistic action in inhibiting human hepatocarcinoma in nude mice and the angiogenesis in tumor. Combined use of the two had no obvious toxicity to the hepatic, renal and hematopoietic systems.
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Affiliation(s)
- Lin Liu
- Department of Oncology, Zhongda Hospital of Eastsouth University, Nanjing
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Fitch RW, Spande TF, Garraffo HM, Yeh HJC, Daly JW. Phantasmidine: an epibatidine congener from the ecuadorian poison frog Epipedobates anthonyi. J Nat Prod 2010; 73:331-7. [PMID: 20337496 PMCID: PMC2866194 DOI: 10.1021/np900727e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The skin of the Ecuadorian poison frog Epipedobates anthonyi contains the potent nicotinic agonists epibatidine (1) and N-methylepibatidine (3). In addition, a condensed tetracyclic epibatidine congener has been identified with activity at nicotinic acetylcholine receptors, but different selectivity than epibatidine. This rigid tetracycle has been named phantasmidine (4). Phantasmidine has a molecular formula of C(11)H(11)N(2)OCl, shares a chloropyridine moiety with 1, and also contains furan, pyrrolidine, and cyclobutane rings. A combination of GC-MS and GC-FTIR analysis with on-column derivatization, 1D NMR spectroscopy with selective irradiation, and spectral simulation, along with 2D NMR, were used to elucidate the structure from a total sample of approximately 20 microg of HPLC-purified 4 and its corresponding acetamide (5). After synthesis, this novel rigid agonist may serve as a selective probe for beta4-containing nicotinic receptors and potentially lead to useful pharmaceuticals.
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Affiliation(s)
- Richard W Fitch
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, DHHS, Bethesda, Maryland 20892, USA.
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Daly JW, Ware N, Saporito RA, Spande TF, Garraffo HM. N-methyldecahydroquinolines: an unexpected class of alkaloids from Amazonian poison frogs (Dendrobatidae). J Nat Prod 2009; 72:1110-1114. [PMID: 19432407 PMCID: PMC3290094 DOI: 10.1021/np900094v] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The dominant alkaloids previously identified in skin extracts of Amazonian dendrobatid frogs of the genus Ameerega are histrionicotoxins and 2,5-disubstituted decahydroquinolines. Analysis of alkaloids in skin extracts of Ameerega picta from Bolivia revealed that the alkaloid 257A, previously reported as a 2,5-disubstituted decahydroquinoline, is an N-methyl-2,5-disubstituted decahydroquinoline. We characterized alkaloids of another 12 of the more than 25 species recently assigned to the genus Ameerega, and five additional N-methyldecahydroquinolines were identified. In some cases, the relative configuration of the N-methyldecahydroquinolines was determined by comparison with the N-methylated products prepared from the corresponding 2,5-disubstituted decahydroquinolines of known relative configuration. A dietary source for N-methyldecahydroquinolines is unknown; however, myrmicine ants are the likely source for the 2,5-disubstituted decahydroquinolines. The alkaloids in skin extracts of three species of another genus of Amazonian poison frog, Adelphobates, were also characterized, but N-methyldecahydroquinolines were not detected.
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Affiliation(s)
| | | | | | | | - H. Martin Garraffo
- To whom correspondence should be addressed. Tel: 301-496-1095. Fax: 301-480-5703.
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Abstract
A diverse array of biologically active, lipid-soluble alkaloids have been discovered in amphibian skin. Such alkaloids include the following: the steroidal samandarines from salamanders, the batrachotoxins, histrionicotoxins, gephyrotoxins, and epibatidine from neotropical poison frogs (Dendrobatidae), the pumiliotoxins, allopumiliotoxins, homopumiliotoxins, and decahydroquinolines from certain genera of anurans from four families (Dendrobatidae, Mantellidae, Bufonidae, and Myobatrachidae), a variety of izidines (pyrrolizidines, indolizidines, quinolizidines, lehmizidines), pyrrolidines, piperidines, various tricyclics (related in structures to the coccinellines), and spiropyrrolizidines from the first three of these four families, the pseudophrynamines from one genus of Australian frogs, and a variety of unclassified alkaloids as yet of undetermined structure. With the exception of the samandarines and the pseudophrynamines, all alkaloids appear to be derived from dietary sources. Although only a few of the over 800 amphibian skin alkaloids have been detected in arthropods, putative arthropod sources for the batrachotoxins and coccinelline-like tricyclics (beetles), the pumiliotoxins (ants, mites), the decahydroquinolines, izidines, pyrrolidines, and piperidines (ants), and the spiropyrrolizidines (millipedes) have been discovered. Ants are likely sources for histrionicotoxins, lehmizidines, and tricyclic gephyrotoxins. Epibatidines represent an important alkaloid class without a putative dietary source. The structures for many of these alkaloids have been rigorously established, while the structures of others represent tentative proposals, based only on mass spectral and FTIR spectral data, along with analogies to structures of well-defined alkaloids.
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Affiliation(s)
- John W Daly
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland 20892-0820, USA.
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Zhao Y, Jin Y, Wei SS, Lee WH, Zhang Y. Purification and characterization of an irreversible serine protease inhibitor from skin secretions of Bufo andrewsi. Toxicon 2005; 46:635-40. [PMID: 16154609 DOI: 10.1016/j.toxicon.2005.07.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2005] [Revised: 06/30/2005] [Accepted: 07/01/2005] [Indexed: 11/18/2022]
Abstract
Amphibian skin secretions contain many bioactive compounds. In the present work, an irreversible serine protease inhibitor, termed baserpin, was purified for the first time from the skin secretions of toad Bufo andrewsi by successive ion-exchange and gel-filtration chromatography. Baserpin is a single chain glycoprotein, with an apparent molecular weight of about 60 kDa in SDS-PAGE. Baserpin is an irreversible inhibitor and effectively inhibits the catalytic activity of trypsin, chymotrypsin and elastase. SDS-stable baserpin-trypsin complex could be seen in SDS-PAGE indicates that it possibly belongs to the serpin superfamily. According to the association rates determined, baserpin is a potent inhibitor of bovine trypsin (4.6 x 10(6) M(-1) s(-1)), bovine chymotrypsin (8.9 x 10(6) M(-1) s(-1)) and porcine elastase (6.8 x 10(6) M(-1) s(-1)), whereas it shows no inhibitory effect on thrombin. The N-terminal sequence of baserpin is HTQYPDILIAKPXDK, which shows no similarity with other known serine protease inhibitors.
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Affiliation(s)
- Yu Zhao
- Department of Animal Toxinology, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, Yunnan 650223, China
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Ko WS, Park TY, Park C, Kim YH, Yoon HJ, Lee SY, Hong SH, Choi BT, Lee YT, Choi YH. Induction of apoptosis by Chan Su, a traditional Chinese medicine, in human bladder carcinoma T24 cells. Oncol Rep 2005; 14:475-80. [PMID: 16012733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023] Open
Abstract
Chan Su is a traditional Chinese medicine prepared from the dried white secretion of the auricular and skin glands of toads, and has been used as an Oriental drug. However, little is known about the effect of Chan Su on the growth of human cancer cells. This study was undertaken to investigate the underlying mechanism of Chan Su-induced apoptosis in a human bladder carcinoma cell line, T24. The effects of this compound were also tested on cyclooxygenase (COX) activity. Treatment of T24 cells with Chan Su resulted in the inhibition of viability and induction of apoptosis in a concentration-dependent manner, which was proved by trypan blue counts, DAPI staining, agarose gel electrophoresis and flow cytometric analysis. Apoptosis of T24 cells by Chan Su was associated with a down-regulation of anti-apoptotic Bcl-2 and Bcl-X(S/L) expression and an up-regulation of pro-apoptotic Bax expression. Chan Su treatment induced the proteolytic activation of caspase-3 and caspase-9, and a concomitant degradation of poly(ADP-ribose)-polymerase and beta-catenin protein. Furthermore, Chan Su decreased the levels of COX-2 mRNA and protein expression without significant changes in the levels of COX-1, which was correlated with an inhibition in prostaglandin E(2) synthesis. Taken together, these findings partially provide novel insights into the possible molecular mechanisms of the anti-cancer activity of Chan Su.
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Affiliation(s)
- Woo Shin Ko
- Department of Oriental Medicine, Dongeui University College of Oriental Medicine and Clinical Research Center of Oriental Medicine, Busan 614-052, Korea
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O'Rourke M, Chen T, Hirst DG, Rao P, Shaw C. The smooth muscle pharmacology of maximakinin, a receptor-selective, bradykinin-related nonadecapeptide from the venom of the Chinese toad, Bombina maxima. ACTA ACUST UNITED AC 2004; 121:65-72. [PMID: 15256275 DOI: 10.1016/j.regpep.2004.04.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2004] [Revised: 04/08/2004] [Accepted: 04/23/2004] [Indexed: 10/26/2022]
Abstract
Structural homologues of vertebrate regulatory peptides found in defensive skin secretions of anuran amphibians often display enhanced bioactivity and receptor binding when compared with endogenous mammalian peptide ligands. Maximakinin, a novel N-terminally extended bradykinin (DLPKINRKGPRPPGFSPFR) from the skin venom of a Chinese toad (Bombina maxima), displays such activity enhancement when compared with bradykinin but is additionally highly selective for mammalian arterial smooth muscle bradykinin receptors displaying a 50-fold increase in molar potency in this smooth muscle type. In contrast, a 100-fold decrease in molar potency was observed at bradykinin receptors in intestinal and uterine smooth muscle preparations. Maximakinin has thus evolved as a "smart" defensive weapon in the toad with receptor/tissue selective targeting. Natural selection of amphibian skin venom peptides for antipredator defence, through inter-species delivery by an exogenous secretory mode, produces subtle structural stabilisation modifications that can potentially provide new insights for the design of selectively targeted peptide therapeutics.
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Affiliation(s)
- Martin O'Rourke
- School of Biomedical Sciences, University of Ulster, Cromore Road, Coleraine BT52 1SA, Northern Ireland, UK
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36
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Marenah L, McClean S, Flatt PR, Orr DF, Shaw C, Abdel-Wahab YHA. Novel insulin-releasing peptides in the skin of Phyllomedusa trinitatis frog include 28 amino acid peptide from dermaseptin BIV precursor. Pancreas 2004; 29:110-5. [PMID: 15257102 DOI: 10.1097/00006676-200408000-00005] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
OBJECTIVE The granular glands of amphibians have long been known to produce many biologically active compounds. The aim of this study was to isolate and characterize insulinotropic peptides from the skin of Phyllomedusa trinitatis frog. METHODS AND RESULTS Crude secretions obtained by mild electrical stimulation of the dorsal skin surface were purified by reverse phase HPLC yielding 80 fractions. In acute incubations with glucose-responsive BRIN-BD11 cells, fractions 39-40 (band 1) and fractions 43-46 (band 2) significantly stimulated insulin release by 1.5 to 2.5-fold. Pooled fractions in bands 1 and 2 were rechromatographed to 4 homogeneous peaks, each with insulin-releasing activity. Mass spectrometry analysis was successfully completed for 3 peptides, indicating 2996.4, 3379.9, and 8326.4 Da. The sequence of the 2996.4 Da peptide was determined as ALWKDILKNVGKAAGKAVLNTVTDMVNQ. This 28-amino-acid peptide has 100% homology with the C-terminal of the 75-amino-acid dermaseptin BIV precursor of a family of structurally related antimicrobial peptides in the skin of the Phyllomedusinae subfamily. CONCLUSION These data demonstrate that the defensive skin secretions of P. trinitatis contain biologically active peptides, which may have mammalian counterparts and merit further investigation as insulin secretagogues.
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Affiliation(s)
- L Marenah
- School of Biomedical Sciences, University of Ulster, Coleraine, Northern Ireland, United Kingdom.
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37
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Mortari MR, Schwartz ENF, Schwartz CA, Pires OR, Santos MM, Bloch C, Sebben A. Main alkaloids from the Brazilian dendrobatidae frog Epipedobates flavopictus: pumiliotoxin 251D, histrionicotoxin and decahydroquinolines. Toxicon 2004; 43:303-10. [PMID: 15033329 DOI: 10.1016/j.toxicon.2004.01.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2003] [Revised: 12/26/2003] [Accepted: 01/06/2004] [Indexed: 11/24/2022]
Abstract
Epipedobates flavopictus, Dendrobatidae, is a small aposematic frog found in Brazilian Cerrado bioma. In the present work, we isolated and characterized chemically the most abundant alkaloids present in the cutaneous extract of E. flavopictus. The specimens were collected in Pirenópolis (Goiás, Brazil), their skins were removed and extracted with methanol, and submitted to purification by HPLC and identification by gas chromatography and mass spectrometry. Pumiliotoxin 251D, histrionicotoxin 285Da and two decahydroquinolines, 219A and 243A, were identified. The pumiliotoxin 251D was tested on isolated frog sciatic nerve and on isolated guinea pig ileum muscle. The pumiliotoxin 251D slightly reduced the action potentials amplitude of frog sciatic nerve. The crude skin extract of E. flavopictus and the pumiliotoxin 251D produced rhythmic contractions and increased the muscular tension on isolated guinea pig ileum.
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Affiliation(s)
- Márcia Renata Mortari
- Laboratório de Toxinologia, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade de Brasília, Campus Universitario, Brasília, DF 70910-900, Brazil
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Smith BP, Tyler MJ, Kaneko T, Garraffo HM, Spande TF, Daly JW. Evidence for biosynthesis of pseudophrynamine alkaloids by an Australian myobatrachid frog (pseudophryne) and for sequestration of dietary pumiliotoxins. J Nat Prod 2002; 65:439-447. [PMID: 11975476 DOI: 10.1021/np010506a] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Australian myobatrachid frogs of the genus Pseudophryne have only two classes of alkaloids in skin extracts, pseudophrynamines (PSs) and pumiliotoxins (PTXs). The former are unique to such Australian frogs, while the PTXs occur worldwide in all other genera of frogs/toads that contain lipophilic alkaloids. The major alkaloid of wild-caught frogs from one population of Pseudophryne semimarmorata was PTX 267C, while PSs were only minor or trace alkaloids. Captive-raised frogs from the same parental stock had no PTXs, but had larger amounts of PSs. A PTX fed to captive-raised frogs accumulated into skin along with dihydro and hydroxy metabolites. Thus, Pseudophryne frogs appear to biosynthesize PSs, but to sequester into skin dietary PTXs. In addition, biosynthesis of PSs appears reduced when high levels of dietary PTXs have accumulated into skin. This is the first evidence indicating that certain frogs are capable of synthesizing rather than merely sequestering alkaloids. A wide range of PSs, including many with molecular weights >500, were detected using both GC-mass spectral and LC-mass spectral analysis.
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Affiliation(s)
- B P Smith
- Department of Environmental Biology, Adelaide University, South Australia, Australia
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Krylov VN. [The study of cardiotonic action of green frog poison Bufo viridis]. Zh Evol Biokhim Fiziol 2002; 38:173-6. [PMID: 12070919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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Gallagher MJ, Chiara DC, Cohen JB. Interactions between 3-(Trifluoromethyl)-3-(m-[125I]iodophenyl)diazirine and Tetracaine, Phencyclidine, or Histrionicotoxin in theTorpedo Species Nicotinic Acetylcholine Receptor Ion Channel. Mol Pharmacol 2001; 59:1514-22. [PMID: 11353813 DOI: 10.1124/mol.59.6.1514] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
3-(Trifluoromethyl)-3-(m-[(125)I]iodophenyl)diazirine ([(125)I]TID) and [(3)H]tetracaine, an aromatic amine, are noncompetitive antagonists (NCAs) of the Torpedo species nicotinic acetylcholine receptor (nAChR), which have been shown by photoaffinity labeling to bind to a common site in the ion channel in the closed state. Although tetracaine and TID bind to the same site, the amine NCAs phencyclidine (PCP) and histrionicotoxin (HTX), which are also believed to bind within the ion channel, interact competitively with tetracaine but allosterically with TID. To better characterize drug interactions within the nAChR ion channel in the closed state, we identified the amino acids photoaffinity labeled by [(125)I]TID in the presence of tetracaine, PCP, or HTX. In the absence of other drugs, [(125)I]TID reacts with alphaLeu-251 (alphaM2-9) and alphaVal-255 (alphaM2-13) and the homologous residues in each of the other subunits. None of the NCAs shifted the sites of [(125)I]TID labeling to other residues within the ion channel. Tetracaine inhibited [(125)I]TID labeling of M2-9 and M2-13 without changing the relative(125)I incorporation at these positions, whereas PCP and HTX each altered the pattern of [(125)I]TID incorporation at M2-9 and M2-13. These results indicate that tetracaine and TID bind in a mutually exclusive manner to a common site in the closed channel that is spatially separated from the binding sites for PCP and HTX.
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Affiliation(s)
- M J Gallagher
- Department of Neurobiology, Harvard Medical School, 220 Longwood Ave., Boston, MA 02115, USA
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Abstract
Chan su (dried toad venom) is a traditional Chinese medicine obtained from the skin venom gland of the toad. Chan su has long been used as a therapeutic agent in China and other Asian countries. Recent reports indicate that Chan su toxicity carries a high mortality rate in the United States. This study focused upon the cardiac electrophysiological and electro-toxicity effects of resibufogenin (RBG), one of the major components in Chan su. Action potentials of isolated sheep and canine heart Purkinje fibers were studied using glass microelectrode recording techniques. The results indicate that RBG significantly affected all parameters of transmembrane action potential, induced delayed after depolarization, and triggered arrhythmias in sheep and canine Purkinje fibers.
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Affiliation(s)
- J T Xie
- The Pritzker School of Medicine, The University of Chicago, Illinois, USA
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Severini C, Falconieri Erspamer G, Erspamer V. Transmitter release and uptake evoked by the amphibian skin alkaloid, pumiliotoxin-B (PTX-B), in the electrically stimulated mouse vas deferens preparation (MVD). J Auton Pharmacol 1998; 18:333-42. [PMID: 9915597 DOI: 10.1046/j.1365-2680.1998.1860333.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Upon electrical stimulation three transmitters are known to be released from the adrenergic nerve terminals of the isolated MVD preparation: two motor transmitters (noradrenaline (NA) and ATP) acting synergistically to provoke twitch contraction, and an inhibitory transmitter, the peptide NPY. The frog alkaloid pumiliotoxin-B (PTX-B) displayed two opposite effects on the electrically stimulated MVD: at low concentrations (0.1-0.3 microM) it caused twitch depression, at higher concentrations (0.5-2 microM) there was a potent twitch stimulation. Transmitters and/or receptors involved in the depressive effect could not be clearly identified, although interference with NPY is possible. On the other hand, the potent twitch stimulation caused by PTX-B may be due to exaggerated release of the same transmitters (NA and ATP) involved in twitch stimulation produced by electrical stimulation. Opening by PTX-B of the Na+ channels on the membrane of the adrenergic nerve terminals causes activation of the amine pump facilitating re-uptake of not only endogenous NA but also of exogenous catecholamines.
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Affiliation(s)
- C Severini
- Institute of Neurobiology, CNR, Rome, Italy
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Bagrov AY, Roukoyatkina NI, Pinaev AG, Dmitrieva RI, Fedorova OV. Effects of two endogenous Na+,K(+)-ATPase inhibitors, marinobufagenin and ouabain, on isolated rat aorta. Eur J Pharmacol 1995; 274:151-8. [PMID: 7768267 DOI: 10.1016/0014-2999(94)00735-p] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Previously, we reported that the venom of Bufo marinus toad contains a Na+,K(+)-ATPase inhibitor with potent vasoconstrictor activity. In the present study, using thin-layer chromatography in Silicagel 60 F254 + 366, we separated a vasoactive substance from a mixture of steroids from Bufo marinus venom. Based on chromatographic mobility of this substance and typical color reaction after its vizualization with SbCl3, we identified it as a previously described steroid, marinobufagenin. Vasoconstrictor and Na+,K+ pump inhibitory properties of marinobufagenin were studied in isolated rat aortic rings and compared with those of ouabain. Ouabain (10-100 mumol.1-1) produced weak vasoconstriction, which was blocked by 2 mumol.1-1 phentolamine. 10 mumol.1-1 ouabain stimulated, and at higher concentrations inhibited, the Na+,K+ pump. 2 mumol.1-1 phentolamine abolished the activating effect of 10 mumol.1-1 ouabain on the Na+,K+ pump, but did not alter the inhibitory action of higher concentrations of ouabain. By contrast, marunibufagenin elicited rapid and strong vasoconstriction and inhibited ouabain-sensitive 86Rb uptake. Antidigoxin antibody antagonized the vasoconstrictor responses to marinobufagenin, but not to ouabain. 2 mumol.1-1 phentolamine did not alter the constrictor effect of marinobufagenin. In solid-phase digoxin immunoassay, marinobufagenin demonstrated higher digoxin-like immunoreactivity than ouabain.
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Affiliation(s)
- A Y Bagrov
- Laboratory of Behavioral Sciences, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
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Arias HR, Johnson DA. Differential agonist-induced displacement of quinacrine and ethidium from their respective histrionicotoxin-sensitive binding sites on the Torpedo acetylcholine receptor. Biochemistry 1995; 34:1589-95. [PMID: 7849018 DOI: 10.1021/bi00005a015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Fluorescence spectroscopy was used to begin to localize the agonist inhibitory binding site on the nicotinic acetylcholine receptor (AcChR) from Torpedo californica. High concentrations of three cholinergic agonists, suberyldicholine (SubCh), acetylcholine (AcCh), and carbamylcholine (CCh), differentially inhibited the binding of two noncompetitive inhibitors (NCIs), quinacrine and ethidium, which bind at distinctly different loci on the desensitized AcChR at zero membrane potential. The agonist-induced inhibition of quinacrine binding occurred at significantly lower (17-fold) concentrations than the inhibition of ethidium binding. Schild plots of SubCh inhibition of ethidium and quinacrine binding showed the competitive nature of the agonist inhibition of the binding of these two NCIs. The quenching constants for short-range quenching of receptor-bound quinacrine and ethidium fluorescence by spin-labeled acetylcholine were about the same as their inhibition constants for agonist-induced displacement of AcChR-bound quinacrine and ethidium. The results demonstrate that agonists can directly bind to both the quinacrine and the ethidium binding sites, albeit at different agonist concentrations. Because the agonist-induced displacement of receptor-bound quinacrine occurs at significantly lower concentrations than the displacement of ethidium, the quinacrine binding site is more likely than the ethidium binding site to form part of the agonist inhibitory binding site.
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Affiliation(s)
- H R Arias
- Division of Biomedical Sciences, University of California, Riverside 92521-0121
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Johnson DA, Nuss JM. The histrionicotoxin-sensitive ethidium binding site is located outside of the transmembrane domain of the nicotinic acetylcholine receptor: a fluorescence study. Biochemistry 1994; 33:9070-7. [PMID: 8049208 DOI: 10.1021/bi00197a007] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A novel, relatively photostable, long-wavelength fluorescent membrane probe, N-(Texas Red sulfonyl)-5(and 6)-dodecanoylamine (C12-Texas Red), was synthesized and used as an electronic energy acceptor for Förster fluorescence resonance energy transfer (FRET) between ethidium bound to a histrionicotoxin-sensitive binding site on the Torpedo nicotinic acetylcholine receptor (AChR) and the lipid membrane surface. FRET from membrane-partitioned 5-(N-dodecanoylamino)fluorescein (C12-fluorescein) to the membrane-partitioned C12-Texas Red was also determined with a parallel set of cuvettes to (1) compare FRET results with a donor in a known position in the membrane and (2) assess the surface density of the membrane-partitioned C12-Texas Red. Stern-Volmer analysis of the FRET results showed that C12-Texas Red quenched membrane-partitioned C12-fluorescein fluorescence 2.9 times more effectively than it quenched the receptor-bound ethidium fluorescence even though the Förster critical distances for the two donor-acceptor pairs were very similar (49.9 and 54.3 A, respectively). Analysis of the ethidium to C12-Texas Red FRET as a function of acceptor surface density with the assumptions that the donor is attached along the major axis of symmetry of a cylindrical protein embedded perpendicularly into the membrane (On-Axis FRET model) suggested that the distance of closest approach between the receptor-bound ethidium and the membrane surface was approximately 52 A. Because the minimum distance between the surface of the lipid-membrane domain and the major symmetry axis of the AChR is approximately 28 A, the FRET results strongly suggest that the ethidium binding site is not located near the entrance of the luminal transmembrane domain is generally assumed.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- D A Johnson
- Division of Biomedical Sciences, University of California, Riverside 92521-0121
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Affiliation(s)
- L H Lazarus
- Peptide Neurochemistry Section, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
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Rai A, Singh G, Raffaniello R, Eng J, Raufman JP. Actions of Helodermatidae venom peptides and mammalian glucagon-like peptides on gastric chief cells. Am J Physiol 1993; 265:G118-25. [PMID: 8393295 DOI: 10.1152/ajpgi.1993.265.1.g118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The actions of peptides (helospectin I, helodermin, exendin-3, exendin-4) that have been isolated from the venoms of Helodermatidae lizards were examined using dispersed chief cells from guinea pig stomach. These actions were compared with those of mammalian glucagon-like peptides, particularly truncated glucagon-like peptide 1 (TGLP-1), a peptide that shares 53% homology with exendin-4. The Helodermatidae venom peptides and TGLP-1 caused a two- to threefold increase in chief cell adenosine 3',5'-cyclic monophosphate and pepsinogen secretion. Exendin-3 and exendin-4 were 100 times more potent than helospectin I and helodermin and 10 times more potent than TGLP-1. Helospectin I and helodermin, but not exendin-4 or TGLP-1, inhibited the binding of 125I-labeled vasoactive intestinal peptide (VIP) and 125I-secretin to dispersed chief cells. The actions of exendin-3, exendin-4, and TGLP-1, but not those of helospectin I, helodermin, VIP, or secretin, were progressively inhibited by increasing concentrations of an exendin-receptor antagonist, exendin-(9-39)-NH2. These data indicate that in gastric chief cells, whereas the actions of helospectin I and helodermin are mediated by interaction with high-affinity secretin (low-affinity VIP) receptors, the actions of exendin-3, exendin-4, and TGLP-1 are mediated by interaction with exendin receptors.
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Affiliation(s)
- A Rai
- Department of Medicine, State University of New York-Health Science Center, Brooklyn 11203-2098
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50
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Bagrov AY, Roukoyatkina NI, Fedorova OV, Pinaev AG, Ukhanova MV. Digitalis-like and vasoconstrictor effects of endogenous digoxin-like factor(s) from the venom of Bufo marinus toad. Eur J Pharmacol 1993; 234:165-72. [PMID: 8387009 DOI: 10.1016/0014-2999(93)90950-m] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Digitalis glycoside-like properties of the Bufo marinus toad crude venom and one of its constituents, bufalin, were studied in various assay systems. In concentrations 0.3-30 micrograms/ml crude venom increased the contractility of isolated electrically driven rat atria, constricted rat aortic rings, inhibited ouabain-sensitive Na+,K(+)-ATPase in rat erythrocytes and the Na+,K(+)-pump in rat aorta, and cross-reacted with antidigoxin antibody from the dissociation enhanced lanthanide fluoroimmunoassay (DELFIA). These effects were unaffected by adrenoceptor blockers and the 5-HT antagonist, deseril, but were blocked by antidigoxin antibody. Bufalin (10-30 microM) increased myocardial contractility and inhibited Na+,K(+)-ATPase in rat erythrocytes similarly to crude Bufo marinus venom. In rat aorta bufalin showed weak and delayed vasoconstrictor activity which was antagonized by 2 microM phentolamine, and had a biphasic effect on the Na+,K(+)-pump; 0.5-1.0 microM bufalin stimulated the pump, while higher concentrations inhibited its activity. Although the effects of bufalin were blocked by antidigoxin antibody, bufalin showed very low digoxin-like immunoreactivity in the DELFIA. These observations suggest that, in addition to bufalin, Bufo marinus venom contains at least one more digitalis-like steroid with significant intrinsic vasoconstrictor activity which, unlike bufalin, constricts the blood vessels acting directly via inhibition of the sodium pump in the vascular smooth muscle membrane.
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Affiliation(s)
- A Y Bagrov
- Division of Cardiology, I.I. Dzhanelidze First Aid (Emergency Medicine), Research Institute, St. Petersburg, Russian Federation
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