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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] [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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Wells M, Hambye S, Blankert B. Preliminary insight into the potential antiplasmodial activity and cytotoxicity of Bufo bufo and Incilius alvarius poison. Toxicon 2023; 227:107092. [PMID: 36967019 DOI: 10.1016/j.toxicon.2023.107092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/14/2023] [Accepted: 03/20/2023] [Indexed: 03/29/2023]
Abstract
The rise and spread of resistant Plasmodium falciparum strains are responsible for an increase in therapeutic failures in many of the regions endemic with malaria. The need for new therapeutic candidates is now more urgent than ever. Animal venoms have long been considered as interesting resources to exploit in terms of potential therapeutic candidates. Among these, the cutaneous secretions of toads constitute a rich and diverse source of bioactive molecules. We focused on two different species: Bufo bufo and Incilius alvarius. The dried secretions underwent a solvent-based extraction and were submitted to a systematic bio-guided fractionation approach using preparative thin-layer chromatography. Initial crude extracts were tested in vitro for their antiplasmodial activity. Based on these results, only crude extracts displaying IC50 < 100 μg/mL were considered for further fractionation. All extracts and fractions, including those that did not display antiplasmodial properties, were characterized by chromatographic (LC-UV/MS) and spectrometric techniques (HRMS). Antiplasmodial activity was evaluated in vitro using a chloroquine-sensitive strain (3D7) and a resistant one (W2). Toxicity was assessed on normal human cells for the samples displaying IC50 < 100 μg/mL. Crude extracts from Bufo bufo secretions exhibited no appreciable antiplasmodial activities. However, the methanol and dichloromethane extracts from Incilius alvarius secretions gave IC50 of (34 ± 4) μg/mL and (50 ± 1) μg/mL respectively when tested on W2 strain. No significant effect was observed on 3D7. This poison would warrant further investigation in terms of its antiplasmodial potential. Following preliminary characterization, it was revealed that the fractions of interest contained mainly bufotoxins, bufagins and alkaloids.
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Liu JH, Yang HL, Deng ST, Hu Z, Chen WF, Yan WW, Hou RT, Li YH, Xian RT, Xie YY, Su Y, Wu LY, Xu P, Zhu ZB, Liu X, Deng YL, Wang YB, Liu Z, Fang WY. The small molecule chemical compound cinobufotalin attenuates resistance to DDP by inducing ENKUR expression to suppress MYH9-mediated c-Myc deubiquitination in lung adenocarcinoma. Acta Pharmacol Sin 2022; 43:2687-2695. [PMID: 35296779 PMCID: PMC9525298 DOI: 10.1038/s41401-022-00890-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 02/15/2022] [Indexed: 12/11/2022] Open
Abstract
The small molecule chemical compound cinobufotalin (CB) is reported to be a potential antitumour drug that increases cisplatin (DDP) sensitivity in nasopharyngeal carcinoma. In this study, we first found that CB decreased DDP resistance, migration and invasion in lung adenocarcinoma (LUAD). Mechanistic studies showed that CB induced ENKUR expression by suppressing PI3K/AKT signalling to downregulate c-Jun, a negative transcription factor of ENKUR. Furthermore, ENKUR was shown to function as a tumour suppressor by binding to β-catenin to decrease c-Jun expression, thus suppressing MYH9 transcription. Interestingly, MYH9 is a binding protein of ENKUR. The Enkurin domain of ENKUR binds to MYH9, and the Myosin_tail of MYH9 binds to ENKUR. Downregulation of MYH9 reduced the recruitment of the deubiquitinase USP7, leading to increased c-Myc ubiquitination and degradation, decreased c-Myc nuclear translocation, and inactivation of epithelial-mesenchymal transition (EMT) signalling, thus attenuating DDP resistance. Our data demonstrated that CB is a promising antitumour drug and may be a candidate chemotherapeutic drug for LUAD patients.
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Affiliation(s)
- Jia-Hao Liu
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Hui-Ling Yang
- Cancer Research Institute, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
- School of Pharmacy, Guangdong Medical University, Dongguan, 523808, China
| | - Shu-Ting Deng
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Zhe Hu
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Wei-Feng Chen
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Wei-Wei Yan
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Ren-Tao Hou
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Yong-Hao Li
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Rui-Ting Xian
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Ying-Ying Xie
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Yun Su
- Key Laboratory of Protein Modification and Degradation, Basic School of Guangzhou Medical University, Guangzhou, 511436, China
| | - Li-Yang Wu
- Key Laboratory of Protein Modification and Degradation, Basic School of Guangzhou Medical University, Guangzhou, 511436, China
| | - Ping Xu
- Respiratory Department, Peking University Shenzhen Hospital, Shenzhen, 518034, China
| | - Zhi-Bo Zhu
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Xiong Liu
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - Yu-Ling Deng
- Department of Chinese Medicine Rehabilitation, Pingxiang People's Hospital, Pingxiang, 337055, China
| | - Yu-Bing Wang
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
- Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, 510060, China.
| | - Zhen Liu
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
- Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
| | - Wei-Yi Fang
- Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
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Sousa Barros ED, Santos Monção Filho ED, Fonseca Pio YP, Amorim MRD, Berlinck RGS, Cássia Moura RD, Fonseca MG, Dantas C, Coelho RC, Silva GRD, Chaves MH, Vieira Júnior GM. Comparative study of composition of methanolic extracts of the paratoid gland secretions (PGS) of Rhinella jimi (cururu toad) from northeastern Brazil: Gender, seasonality and geographic occurrence. Toxicon 2022; 214:37-46. [PMID: 35562061 DOI: 10.1016/j.toxicon.2022.04.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 10/18/2022]
Abstract
Toads belonging to the Bufonidae family have a pair of paratoid glands that store highly toxic a biological secretion with varied chemical composition, that act as a chemical defense against microbial infections and predators. The paratoid gland secretion (PGS) of bufonids is rich in bioactive steroids, alkaloids, proteins, bufadienolides and bufotoxins. In the present investigation we performed a systematic analysis of the chemical profile of PGS obtained from the Bufonidae toad Rhinella jimi ("Cururu" toad) collected at three different regions of Piauí state, Northeastern Brazil. Our aim was to investigate the PGS variation related to the season of animals collection, geographic distribution and gender of the animals. The methanolic extracts of PGS were analyzed by UPLC-QToF-MS/MS. Principal component analysis (PCA) were applied to the data set obtained by the UPLC-QToF-MS/MS analyses. Among 23 compounds identified, dehydrobufotenine, suberoyl arginine, 3-(N-suberoyl-argininyl) telocinobufagin, 3-(N-suberoyl-argininyl) marinobufagin, telocinobufagin, marinobufagin and 3-(N-suberoyl-argininyl) bufalin were detected in all PGS. Minimal variations in the composition of paratoid secretions of R. jimi were observed related to distinct geographical and seasonal parameters. R. jimi female animals presented the most diverse chemical composition in its PGS. With this comparative study, unprecedented for the species, it was possible to observe that the secretions of the paratoid glands produced by R. jimi from different regions of the state of Piauí, at different times of the year, presented consistent chemical composition, with discrete particularities in the number and nature chemistry of its constituents.
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Affiliation(s)
- Elcio Daniel Sousa Barros
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil; Department of Teaching, Research and Extension, Federal Institute of Maranhão, Cep 65620-000, Coelho Neto, Maranhão, Brazil
| | - Evaldo Dos Santos Monção Filho
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil
| | - Yara Polianna Fonseca Pio
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil
| | - Marcelo Rodrigues de Amorim
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, Cep.13560-970, São Carlos, São Paulo, Brazil
| | - Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, Cep.13560-970, São Carlos, São Paulo, Brazil
| | - Rita de Cássia Moura
- Biology Coordination, Federal University of Piauí, Cep: 64607-670, Picos, Piauí, Brazil
| | | | - Clécio Dantas
- Laboratório de Química Computacional Inorgânica e Quimiometria - LQCINMETRIA, State University of Maranhão, Cep: 65604-380, Caxias, Maranhão, Brazil
| | - Ronaldo Cunha Coelho
- Teacher Training Department, Federal Institute of Piauí, Cep: 64000-040, Teresina, Piauí, Brazil
| | | | - Mariana Helena Chaves
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil
| | - Gerardo Magela Vieira Júnior
- Laboratory of Natural Products, Department of Chemistry, Federal University of Piauí, Cep: 64049-550, Teresina, Piauí, Brazil.
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Barnett JB, Michalis C, Scott-Samuel NE, Cuthill IC. Colour pattern variation forms local background matching camouflage in a leaf-mimicking toad. J Evol Biol 2021; 34:1531-1540. [PMID: 34465010 DOI: 10.1111/jeb.13923] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/17/2021] [Accepted: 08/26/2021] [Indexed: 12/26/2022]
Abstract
Optimal camouflage can, in principle, be relatively easily achieved in simple, homogeneous, environments where backgrounds always have the same colour, brightness and patterning. Natural environments are, however, rarely homogenous, and species often find themselves viewed against varied backgrounds where the task of concealment is more challenging. One result of variable backgrounds is the evolution of intraspecific phenotypic variation which may either be generalized, with multiple similarly cryptic patterns, or specialized, with each discrete colour form maximizing concealment against a single component of the background. We investigated the role of phenotypic variation in a highly variable population of the Neotropical toad Rhinella margaritifera using visual modelling and a computer-based detection task. We found that phenotypic variation was not divided into discrete colour morphs, and all toads were well camouflaged against the forest floor. However, although the whole population may appear to consist of random samples from the background, the toads were a particularly close match to the leaf litter, suggesting that they masquerade as dead leaves, which are themselves variable. Furthermore, rather than each colour form being equally effective against a single background, each toad was specialized towards its own particular local surroundings, as suggested by a specialist strategy. Taken together, these data highlight the importance of background matching to a nominally masquerading species, as well as how habitat heterogeneity at multiple spatial scales may affect the evolution of camouflage and phenotypic variation.
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Affiliation(s)
- James B Barnett
- School of Biological Sciences, University of Bristol, Bristol, UK.,Redpath Museum, McGill University, Montreal, QC, Canada.,Department of Psychology, Neuroscience, & Behaviour, McMaster University, Hamilton, ON, Canada
| | | | | | - Innes C Cuthill
- School of Biological Sciences, University of Bristol, Bristol, UK
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The Parotoid Gland Secretion from Peruvian Toad Rhinella horribilis (Wiegmann, 1833): Chemical Composition and Effect on the Proliferation and Migration of Lung Cancer Cells. Toxins (Basel) 2020; 12:toxins12090608. [PMID: 32971938 PMCID: PMC7551750 DOI: 10.3390/toxins12090608] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/02/2020] [Accepted: 09/09/2020] [Indexed: 12/25/2022] Open
Abstract
Since Rhinella sp. toads produce bioactive substances, some species have been used in traditional medicine and magical practices by ancient cultures in Peru. During several decades, the Rhinella horribilis toad was confused with the invasive toad Rhinella marina, a species documented with extensive toxinological studies. In contrast, the chemical composition and biological effects of the parotoid gland secretions (PGS) remain still unknown for R. horribilis. In this work, we determine for the first time 55 compounds from the PGS of R. horribilis, which were identified using HPLC-MS/MS. The crude extract inhibited the proliferation of A549 cancer cells with IC50 values of 0.031 ± 0.007 and 0.015 ± 0.001 µg/mL at 24 and 48 h of exposure, respectively. Moreover, it inhibited the clonogenic capacity, increased ROS levels, and prevented the etoposide-induced apoptosis, suggesting that the effect of R. horribilis poison secretion was by cell cycle blocking before of G2/M-phase checkpoint. Fraction B was the most active and strongly inhibited cancer cell migration. Our results indicate that the PGS of R. horribilis are composed of alkaloids, bufadienolides, and argininyl diacids derivatives, inhibiting the proliferation and migration of A549 cells.
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