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Hwang N, Pei Y, Clement J, Robertson ES, Du Y. Identification of a 3-β-homoalanine conjugate of brusatol with reduced toxicity in mice. Bioorg Med Chem Lett 2020; 30:127553. [PMID: 32971261 DOI: 10.1016/j.bmcl.2020.127553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 08/19/2020] [Revised: 09/08/2020] [Accepted: 09/10/2020] [Indexed: 12/18/2022]
Abstract
Brusatol, a quassinoid natural product, is effective against multiple diseases including hematologic malignancies, as we reported recently by targeting the PI3Kγ isoform, but toxicity limits its further development. Herein, we report the synthesis of a series of conjugates of brusatol with amino acids and short peptides at its enolic hydroxyl at C-3. A number of conjugates with smaller amino acids and peptides demonstrated activities comparable to brusatol. Through in vitro and in vivo evaluations, we identified UPB-26, a conjugate of brusatol with a L- β-homoalanine, which exhibits good chemical stability at physiological pH's (SGF and SIF), moderate rate of conversion to brusatol in both human and rat plasmas, improved mouse liver microsomal stability, and most encouragingly, enhanced safety compared to brusatol in mice upon IP administration.
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Affiliation(s)
- Nicky Hwang
- Baruch S. Blumberg Institute, Doylestown, PA, USA
| | - Yonggang Pei
- Departments of Otorhinolaryngology-Head and Neck Surgery, and Microbiology, and the Tumor Virology Program, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | | | - Erle S Robertson
- Departments of Otorhinolaryngology-Head and Neck Surgery, and Microbiology, and the Tumor Virology Program, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
| | - Yanming Du
- Baruch S. Blumberg Institute, Doylestown, PA, USA.
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Bhat IA, Nazir MI, Ahmad I, Pathakota GB, Chanu TI, Goswami M, Sundaray JK, Sharma R. Fabrication and characterization of chitosan conjugated eurycomanone nanoparticles: In vivo evaluation of the biodistribution and toxicity in fish. Int J Biol Macromol 2018; 112:1093-1103. [PMID: 29447967 DOI: 10.1016/j.ijbiomac.2018.02.067] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 12/10/2017] [Revised: 02/08/2018] [Accepted: 02/11/2018] [Indexed: 12/12/2022]
Abstract
Chitosan nanoparticles (CNPs) have been proven considerable delivery agents due to their remarkable physicochemical properties. Present study reports the fabrication of CNPs by ionic gelation process and their characterization by different approaches. The constructed nanoparticles were successfully conjugated with eurycomanone with significant entrapment efficiency. Particle size of chitosan and chitosan conjugated eurycomanone nanoparticles were 126.2nm and 130nm respectively. Scanning electron microscopy showed that the particles were spherical in shape and well dispersed. Cross-linking between CNPs and eurycomanone (CENPs) were confirmed by Fourier-transform infrared (FTIR) spectroscopy. Fluorescent nanoparticles were prepared by using Rhodamine-6G dye, characterised by SEM and confirmed for conjugation by FTIR. Biodistribution of CENPs showed the presence of fluorescent nanoparticles in liver, kidney, testes and brain of C. magur. The toxicity of CENPs was evaluated by comparing the histological sections of catfish testes collected from treated and control group. No signs of toxicity were seen in testes after the delivery of CENPs. Molecular docking study revealed high spontaneous binding ability of chitosan with eurycomanone and aromatase enzyme. The study reports that CNPs can act as a stabilizing agent for eurycomanone formulation and could be a promising approach to increase the reproductive performance of the fishes.
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Affiliation(s)
- Irfan Ahmad Bhat
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
| | - Mir Ishfaq Nazir
- Division of Fish Nutrition and Feed Technology, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
| | - Irshad Ahmad
- Division of Aquaculture, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
| | - Gireesh-Babu Pathakota
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
| | - T I Chanu
- Aquaculture, ICAR-Central Institute of Fisheries Education, Balabhadrapuram, Kakinada 533343, India
| | - Mukunda Goswami
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India
| | - J K Sundaray
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar 751002, Odisha, India
| | - Rupam Sharma
- Division of Fish Genetics and Biotechnology, ICAR-Central Institute of Fisheries Education, Mumbai 400061, India.
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Ma R, Li H, Zhang Y, Lin Y, Qiu X, Xie M, Yao B. The toxic effects and possible mechanisms of Brusatol on mouse oocytes. PLoS One 2017; 12:e0177844. [PMID: 28542354 PMCID: PMC5436816 DOI: 10.1371/journal.pone.0177844] [Citation(s) in RCA: 8] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 05/04/2017] [Indexed: 11/25/2022] Open
Abstract
Brusatol is a natural quassinoid that shows a potential therapeutic use in cancer models by the inhibition of Nuclear factor erythroid 2-related factor 2 (Nrf2) and is capable of inducing a variety of biological effects. The effects of Brusatol on oocyte meiosis has not been addressed. In this study, we investigated the impact of Brusatol treatment on mouse oocyte maturation and its possible mechanism. Our data demonstrated that Brusatol treatment disrupted oocyte maturation and spindle/chromosome organization by modulating Nrf2-Cyclin B1 pathway, as the influence of Brusatol was compensated by the addition of Nrf2 activation plasmid, and the mRNA and protein levels of Cyclin B1 were severely reduced in oocytes following Nrf2 decline. In summary, our data support a model that Brusatol, through the inhibition of Nrf2, modulate Cyclin B1 levels, consequently disturbing proper spindle assembly and chromosome condensation in meiotic oocytes.
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Affiliation(s)
- Rujun Ma
- Center for Reproductive Medicine, Jinling Hospital, Clinical School of Medical College, Nanjing University, Jiangsu, People's Republic of China
| | - Hongru Li
- Center for Reproductive Medicine, Jinling Hospital, Clinical School of Medical College, Nanjing University, Jiangsu, People's Republic of China
| | - Yu Zhang
- College of Animal Sciences and Technology, Nanjing Agricultural University, Jiangsu, People's Republic of China
| | - Ying Lin
- Center for Reproductive Medicine, Jinling Hospital, Clinical School of Medical College, Nanjing University, Jiangsu, People's Republic of China
- College of Life Science, Nanjing Normal University, Jiangsu, People's Republic of China
| | - Xuhua Qiu
- Center for Reproductive Medicine, Jinling Hospital, Clinical School of Medical College, Nanjing University, Jiangsu, People's Republic of China
| | - Min Xie
- Center for Reproductive Medicine, Jinling Hospital, Clinical School of Medical College, Nanjing University, Jiangsu, People's Republic of China
| | - Bing Yao
- Center for Reproductive Medicine, Jinling Hospital, Clinical School of Medical College, Nanjing University, Jiangsu, People's Republic of China
- * E-mail:
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Zhang L, Feng X, Ma D, Yang J, Jiang H, Zhang Y, He W. Brusatol isolated from Brucea javanica (L.) Merr. induces apoptotic death of insect cell lines. Pestic Biochem Physiol 2013; 107:18-24. [PMID: 25149230 DOI: 10.1016/j.pestbp.2013.04.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [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: 06/25/2012] [Revised: 04/19/2013] [Accepted: 04/20/2013] [Indexed: 06/03/2023]
Abstract
Brucea javanica (L.) Merr. is a medicine plant distributed widely throughout Asia where its bitter fruits have been used traditionally in medicine for treating various ailments and controlling some pests. In recent years, concerns over the potential impact of synthetic pesticides on human health and environment have now become more pressing to develop environmentally friendly pesticides. In this paper, brusatol, a quassinoid, was isolated from the fruit of B. javanica, and identified using X-ray crystallographic analysis. Results showed that brusatol has potent contact toxicity (LD50, 2.91 μg/larva, 72 h) and anfieedant activity (AFC50, 17.4 mg/L, 48 h) against the third-instar larvae of Spodoptera exigua. Brusatol demonstrated cytotoxic effects to the tested insect cell lines, IOZCAS-Spex-II and Sf21, in a time- and dose-dependent manner. After brusatol treatment, apoptotic cell death with the DNA fragmentation, activation of caspase-3 and release of cytochrome c was preliminarily observed in both IOZCAS-Spex-II and Sf21. These results indicated the existence of apoptotic death with the mitochondrial-dependent pathway induced by brusatol in Sf21 and IOZCAS-Spex-II cell lines. Our studies will provide important knowledge to understand mechanisms of action of brusatol and to develop brusatol and its derivatives as insecticides.
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Affiliation(s)
- Lan Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Xuehuan Feng
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Dejun Ma
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Jingjing Yang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Hongyun Jiang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China.
| | - Yanning Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Weizhi He
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
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Murakami N, Sugimoto M, Kawanishi M, Tamura S, Kim HS, Begum K, Wataya Y, Kobayashi M. New semisynthetic quassinoids with in vivo antimalarial activity. J Med Chem 2003; 46:638-41. [PMID: 12570385 DOI: 10.1021/jm0201971] [Citation(s) in RCA: 23] [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] [Indexed: 11/29/2022]
Abstract
On the basis of a comparative analysis for stability in mouse serum between 15-O-acetylbruceolide and bruceolide 15-methyl carbonate, several 3,15-dialkyl carbonates of bruceolide were synthesized and their in vitro antimalarial activity was assessed. Methyl, ethyl, and isopropyl carbonates with pronounced in vitro activity were further evaluated for in vivo antimalarial potency. Both the methyl and ethyl carbonates significantly increased the life span of mice as compared with 3,15-di-O-accetylbruceolide and chloroquine.
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Affiliation(s)
- Nobutoshi Murakami
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka 565-0871, Japan
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