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Cardona-Trujillo MC, Jiménez-González FJ, Veloza LA, Sepúlveda-Arias JC. In Vitro Anti- Toxoplasma Activity of Extracts Obtained from Tabebuia rosea and Tabebuia chrysantha: The Role of β-Amyrin. Molecules 2024; 29:920. [PMID: 38474432 DOI: 10.3390/molecules29050920] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/01/2024] [Accepted: 02/02/2024] [Indexed: 03/14/2024] Open
Abstract
Toxoplasmosis is a parasitic disease caused by the protozoan Toxoplasma gondii that is highly prevalent worldwide. Although the infection is asymptomatic in immunocompetent individuals, it severely affects immunocompromised individuals, causing conditions such as encephalitis, myocarditis, or pneumonitis. The limited therapeutic efficacy of drugs currently used to treat toxoplasmosis has prompted the search for new therapeutic alternatives. The aim of this study was to determine the anti-Toxoplasma activity of extracts obtained from two species of the genus Tabebuia. Twenty-six extracts, 12 obtained from Tabebuia chrysantha and 14 from Tabebuia rosea, were evaluated by a colorimetric technique using the RH strain of T. gondii that expresses β-galactosidase. Additionally, the activity of the promising extracts and their active compounds was evaluated by flow cytometry. β-amyrin was isolated from the chloroform extract obtained from the leaves of T. rosea and displayed important anti-Toxoplasma activity. The results show that natural products are an important source of new molecules with considerable biological and/or pharmacological activity.
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Affiliation(s)
- Maria Camila Cardona-Trujillo
- Grupo Infección e Inmunidad, Facultad de Ciencias de la Salud, Universidad Tecnológica de Pereira, Pereira 660003, Colombia
| | | | - Luz Angela Veloza
- Grupo Polifenoles, Facultad de Tecnologías, Escuela de Química, Universidad Tecnológica de Pereira, Pereira 660003, Colombia
| | - Juan Carlos Sepúlveda-Arias
- Grupo Infección e Inmunidad, Facultad de Ciencias de la Salud, Universidad Tecnológica de Pereira, Pereira 660003, Colombia
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Akinmurele OJ, Sonibare MA, Elujoba AA, Ogunlakin AD, Yeye OE, Gyebi GA, Ojo OA, Alanzi AR. Antispasmodic Effect of Alstonia boonei De Wild. and Its Constituents: Ex Vivo and In Silico Approaches. Molecules 2023; 28:7069. [PMID: 37894548 PMCID: PMC10609272 DOI: 10.3390/molecules28207069] [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: 08/20/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Alstonia boonei, belonging to the family Apocynaceae, is one of the best-known medicinal plants in Africa and Asia. Stem back preparations are traditionally used as muscle relaxants. This study investigated the antispasmodic properties of Alstonia boonei Stem back and its constituents. METHOD The freeze-dried aqueous Stem back extract of A. boonei, as well as dichloromethane (DCM), ethyl acetate, and aqueous fractions, were evaluated for their antispasmodic effect via the ex vivo method. Two compounds were isolated from the DCM fraction using chromatographic techniques, and their antispasmodic activity was evaluated. An in silico study was conducted by evaluating the interaction of isolated compounds with human PPARgamma-LBD and human carbonic anhydrase isozyme. RESULTS The Stem back crude extract, DCM, ethyl acetate, and aqueous fractions showed antispasmodic activity on high-potassium-induced (K+ 80 mM) contractions on isolated rat ileum with IC50 values of 0.03 ± 0.20, 0.02 ± 0.05, 0.03 ± 0.14, and 0.90 ± 0.06 mg/mL, respectively. The isolated compounds from the DCM fraction were β-amyrin and boonein, with only boonein exhibiting antispasmodic activity on both high-potassium-induced (IC50 = 0.09 ± 0.01 µg/mL) and spontaneous (0.29 ± 0.05 µg/mL) contractions. However, β-amyrin had a stronger interaction with the two proteins during the simulation. CONCLUSION The isolated compounds boonein and β-amyrin could serve as starting materials for the development of antispasmodic drugs.
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Affiliation(s)
- Opeyemi Josephine Akinmurele
- Department of Pharmacognosy, Faculty of Pharmacy, Madonna University, Elele 512101, Nigeria;
- Department of Pharmacognosy, Faculty of Pharmacy, University of Ibadan, Ibadan 200005, Nigeria
- Comsat International Institute of Technology (CIIT), Abbotabad 22020, Pakistan
| | - Mubo Adeola Sonibare
- Department of Pharmacognosy, Faculty of Pharmacy, University of Ibadan, Ibadan 200005, Nigeria
| | - Anthony A. Elujoba
- Department of Pharmacognosy, Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife 220101, Nigeria;
| | - Akingbolabo Daniel Ogunlakin
- Phytomedicine, Molecular Toxicology, and Computational Biochemistry Research Laboratory (PMTCB-RL), Department of Biochemistry, Bowen University, Iwo 232101, Nigeria;
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan;
| | - Oloruntoba Emmanuel Yeye
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan;
- Department of Chemistry, Faculty of Science, University of Ibadan, Ibadan 200005, Nigeria
| | - Gideon Ampoma Gyebi
- Natural products and Structural (Bio-Chem)-Informatics Research Laboratory (NpsBC-RI), Department of Biochemistry, Bingham University, Karu 961105, Nigeria;
| | - Oluwafemi Adeleke Ojo
- Phytomedicine, Molecular Toxicology, and Computational Biochemistry Research Laboratory (PMTCB-RL), Department of Biochemistry, Bowen University, Iwo 232101, Nigeria;
| | - Abdullah R. Alanzi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 12271, Saudi Arabia;
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Pereira H, Simões R, Miranda I. Cuticular Waxes and Cutin in Terminalia catappa Leaves from the Equatorial São Tomé and Príncipe Islands. Molecules 2023; 28:6365. [PMID: 37687194 PMCID: PMC10489119 DOI: 10.3390/molecules28176365] [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: 08/07/2023] [Revised: 08/23/2023] [Accepted: 08/28/2023] [Indexed: 09/10/2023] Open
Abstract
This study presents for the first time an analysis of the content and chemical composition of the cuticular waxes and cutin in the leaves of the widespread and important tropical species Terminalia catappa. The leaves were collected in the equatorial Atlantic islands of São Tomé and Príncipe, in the Gulf of Guinea. The epicuticular and intracuticular waxes were determined via dichloromethane extraction and their chemical composition via GC-MS analysis, and the content and monomeric composition of cutin were determined after depolymerization via methanolysis. The leaves contained an epidermal cuticular coverage of 52.8 μg cm-2 of the cuticular waxes (1.4% of mass) and 63.3 μg cm-2 (1.5% of mass) of cutin. Cuticular waxes include mainly n-alkanols and fatty acids, with a substantial proportion of terpenes in the more easily solubilized fraction, and sterols in the more embedded waxes. Cutin is mostly constituted by C16 fatty acids and dihydroxyacids, also including aromatic monomers, suggesting a largely linear macromolecular arrangement. The high proportion of triacontanol, α-amyrin, β-amyrin, germanicol, and lupeol in the easily solubilized cuticular fraction may explain the bioactive properties attributed to the T. catappa leaves via the popular medicine, which allows us to consider them as a potential source for the extraction of these compounds.
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Affiliation(s)
- Helena Pereira
- Centro de Estudos Florestais (CEF), Laboratório Associado Terra, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal; (R.S.); (I.M.)
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Jobaer MA, Ashrafi S, Ahsan M, Hasan CM, Rashid MA, Islam SN, Masud MM. Phytochemical and Biological Investigation of an Indigenous Plant of Bangladesh, Gynura procumbens (Lour.) Merr.: Drug Discovery from Nature. Molecules 2023; 28:molecules28104186. [PMID: 37241926 DOI: 10.3390/molecules28104186] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 05/11/2023] [Accepted: 05/13/2023] [Indexed: 05/28/2023] Open
Abstract
Gynura procumbens (Lour.) Merr. (Family: Asteraceae) is a tropical Asian medicinal plant found in Thailand, China, Malaysia, Indonesia, and Vietnam. It has long been utilized to treat a variety of health concerns in numerous countries around the world, such as renal discomfort, constipation, diabetes mellitus, rheumatism, and hypertension. The chemical investigation resulted in the isolation and characterization of six compounds from the methanol (MeOH) extract of the leaves of Gynura procumbens, which were identified as phytol (1), lupeol (2), stigmasterol (3), friedelanol acetate (4), β-amyrin (5), and a mixture of stigmasterol and β-sitosterol (6). In-depth investigations of the high-resolution 1H NMR and 13C NMR spectroscopic data from the isolated compounds, along with comparisons to previously published data, were used to clarify their structures. Among these, the occurrence of Compounds 1 and 4 in this plant are reported for the first time. The crude methanolic extract (CME) and its different partitionates, i.e., petroleum ether (PESF), chloroform (CSF), ethyl acetate (EASF), and aqueous (AQSF) soluble fractions, were subjected to antioxidant, cytotoxic, thrombolytic, and anti-diabetic activities. In a DPPH free radical scavenging assay, EASF showed the maximum activity, with an IC50 value of 10.78 µg/mL. On the other hand, CSF displayed the highest cytotoxic effect with an LC50 value of 1.94 µg/mL compared to 0.464 µg/mL for vincristine sulphate. In a thrombolytic assay, the crude methanolic extract exhibited the highest activity (63.77%) compared to standard streptokinase (70.78%). During the assay for anti-diabetic activity, the PESF showed 70.37% of glucose-lowering activity, where standard glibenclamide showed 63.24% of glucose-reducing activity.
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Affiliation(s)
- Md Abu Jobaer
- Phytochemical Research Laboratory, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka, Dhaka 1000, Bangladesh
| | - Sania Ashrafi
- Phytochemical Research Laboratory, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka, Dhaka 1000, Bangladesh
| | - Monira Ahsan
- Phytochemical Research Laboratory, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka, Dhaka 1000, Bangladesh
| | - Choudhury Mahmood Hasan
- Phytochemical Research Laboratory, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka, Dhaka 1000, Bangladesh
| | - Mohammad Abdur Rashid
- Phytochemical Research Laboratory, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka, Dhaka 1000, Bangladesh
| | - Sheikh Nazrul Islam
- Institute of Nutrition and Food Science, University of Dhaka, Dhaka 1000, Bangladesh
| | - Mohammad Mehedi Masud
- Phytochemical Research Laboratory, Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Dhaka, Dhaka 1000, Bangladesh
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Zhu Y, Zhou C, Liu X, Li X, Shi C, Zhang Y, Wang Y, Li C. Aided-efflux and high production of β-amyrin realized by β-cyclodextrin in situ synthesized on surface of Saccharomyces cerevisiae. Biotechnol Bioeng 2023; 120:1147-1158. [PMID: 36593696 DOI: 10.1002/bit.28327] [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: 10/03/2022] [Revised: 12/28/2022] [Accepted: 12/29/2022] [Indexed: 01/04/2023]
Abstract
As a plant-derived pentacyclic triterpenoid, β-amyrin has been heterogeneously synthesized in Saccharomyces cerevisiae. However, β-amyrin is intracellularly produced in a lower gram scale using recombinant S. cerevisiae, which limits the industrial applications. Although many strategies have been proven to be effective to improve the production of β-amyrin, the intracellularly accumulation is still a challenge in reaching higher titer and simplifying the extraction process. To solve this problem, the amphiphilic β-cyclodextrin (β-CD) has been previously employed to aid the efflux of β-amyrin out of the cells. Nevertheless, the supplemented β-CD in the medium is not consistent with β-amyrin synthesis and has the disadvantage of rather high cost. Therefore, an aided-efflux system based on in situ synthesis of β-CD was developed in this study to enhance the biosynthesis of β-amyrin and its efflux. The in situ synthesis of β-CD was started from starch by the surface displayed cyclodextrin glycosyltransferase (CGTase) on yeast cells. As a result, the synthesized β-CD could capture 16% of the intracellular β-amyrin and improve the total production by 77%. Furthermore, more strategies including inducing system remodeling, precursor supply enhancement, two-phase fermentation and lipid synthesis regulation were employed. Finally, the production of β-amyrin was increased to 73 mg/L in shake flask, 31 folds higher than the original strain, containing 31 mg/L of extracellular β-amyrin. Overall, this work provides novel strategies for the aided-efflux of natural products with high hydrophobicity in engineered S. cerevisiae.
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Affiliation(s)
- Ying Zhu
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Institute of Biochemical Engineering, Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
| | - Chen Zhou
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Institute of Biochemical Engineering, Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
| | - Xia Liu
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Institute of Biochemical Engineering, Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
| | - Xinying Li
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Institute of Biochemical Engineering, Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
| | - Caifang Shi
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Institute of Biochemical Engineering, Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
| | - Yapeng Zhang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Institute of Biochemical Engineering, Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
| | - Ying Wang
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Institute of Biochemical Engineering, Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
| | - Chun Li
- Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Institute of Biochemical Engineering, Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
- Key Laboratory for Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering, Tsinghua University, Beijing, China
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Wang Y, Wang B, Xu F, Ma X. Molecular Cloning and Functional Characterization of Oxidosqualene Cyclases from Panax vietnamensis. Chem Biodivers 2023; 20:e202200874. [PMID: 36635849 DOI: 10.1002/cbdv.202200874] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 12/22/2022] [Accepted: 01/11/2023] [Indexed: 01/14/2023]
Abstract
Panax vietnamensis is a valuable medicinal resource with promising preclinical applications. Ginsenosides, which are triterpenoids, are the primary active components in P. vietnamensis. Oxidosqualene cyclases (OSCs) catalyze the formation of the basic skeleton of triterpenes from 2,3-oxidosqualene, which is a crucial step in the biosynthesis of triterpenoids. The OSCs involved in triterpenoid biosynthesis in P. vietnamensis have not yet been characterized. Four OSC genes (PvOSC1-4) were cloned from P. vietnamensis and functionally characterized via heterologous expression in yeast. Transgenic yeast expressing PvOSC1, PvOSC3, and PvOSC4 produced the corresponding products β-amyrin, cycloartenol, and dammarenediol-II, respectively. PvOSC1, PvOSC3, and PvOSC4 are monofunctional OSCs. In this study, we characterized three PvOSC genes, providing a better understanding of the biosynthesis of triterpenoids in P. vietnamensis and the multiple choices of plant OSCs for metabolic engineering in yeast and other hosts.
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Affiliation(s)
- Yibo Wang
- Key Laboratory of Yunnan Provincial Department of Education on Substance Benchmark Research of Ethnic Medicines, Yunnan University of Chinese Medicine, Kunming, 650500, China.,College of Chinese Materia Medica and Yunnan Key Laboratory of Southern Medicinal Utilization, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Baojie Wang
- College of Chinese Materia Medica and Yunnan Key Laboratory of Southern Medicinal Utilization, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Furong Xu
- College of Chinese Materia Medica and Yunnan Key Laboratory of Southern Medicinal Utilization, Yunnan University of Chinese Medicine, Kunming, 650500, China
| | - Xiaohui Ma
- Key Laboratory of Yunnan Provincial Department of Education on Substance Benchmark Research of Ethnic Medicines, Yunnan University of Chinese Medicine, Kunming, 650500, China.,College of Chinese Materia Medica and Yunnan Key Laboratory of Southern Medicinal Utilization, Yunnan University of Chinese Medicine, Kunming, 650500, China
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Afata TN, Dekebo A. Chemical Composition and Antimicrobial Effect of Western Ethiopian Propolis. Chem Biodivers 2023; 20:e202200922. [PMID: 36575948 DOI: 10.1002/cbdv.202200922] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/18/2022] [Accepted: 12/23/2022] [Indexed: 12/29/2022]
Abstract
Propolis or bee glue is commonly named as a natural resinous mixture produced by honeybees (Apis mellifera) from substances collected from parts of plants, buds, and exudate. The result of the ethyl acetate - methanol (3 : 2) volume by volume fraction yielded a total of two compounds namely betulinic acid and β-amyrin isolated from Bodji Dirmaji and Fincha'a district propolis, respectively. The crude ethanolic extract was portioned with the different solvent systems by increasing the polarities in the following order of hexane, ethyl acetate, and methanol. Column chromatographic method on normal silica gel was used to isolate the compounds. The structures of the compounds were characterized using 1D NMR techniques. The study revealed that western Ethiopian propolis was rich in saponins, tannins, flavonoids, steroids, triterpenes, and glycosides. The antibacterial activity for the isolated compound (betulinic acid) showed the highest inhibition for S. aureus (11.2±1.6), E. coli (17.7±1.1), and A. niger (12.6±1.2) mm.
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Affiliation(s)
- Tariku Neme Afata
- Department of Environmental Health Science and Technology, Jimma University, Ethiopia.,Oromia Region, Dambi Dollo Teachers College, Ethiopia
| | - Aman Dekebo
- Department of Applied Chemistry, Adama Science and Technology University, Adama, Ethiopia.,Institute of Pharmaceutical Sciences, Adama Science and Technology University, Adama, Ethiopia
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Han G, Lee DG. Antibacterial Mode of Action of β-Amyrin Promotes Apoptosis-Like Death in Escherichia coli by Producing Reactive Oxygen Species. J Microbiol Biotechnol 2022; 32:1547-1552. [PMID: 36384774 PMCID: PMC9843749 DOI: 10.4014/jmb.2209.09040] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/29/2022] [Accepted: 11/02/2022] [Indexed: 11/18/2022]
Abstract
β-Amyrin is a pentacyclic triterpene widely distributed in leaves and stems worldwide. The ability of β-amyrin to induce the production of reactive oxygen species (ROS) in microorganisms suggests its potential as an antimicrobial agent. Thus, this study aimed to elucidate the antibacterial mode of action of β-amyrin. We treated Escherichia coli cells with β-amyrin and found that it triggered ROS accumulation. Excessive stress caused by ROS, particularly hydroxyl radicals, induces glutathione (GSH) dysfunction. GSH protects cells from oxidative and osmotic stresses; thus, its dysfunction leads to membrane depolarization. The resultant change in membrane potential leads to the release of apoptotic proteins, such as caspases. The activated caspases-like protein promotes the cleavage of DNA into single strands, which is a hallmark of apoptosis-like death in bacteria. Apoptotic cells usually undergo events such as DNA fragmentation and phosphatidylserine exposure, differentiating them from necrotic cells, and the cells treated with β-amyrin in this study were positive for annexin V and negative for propidium iodide, indicating apoptosis-like death. In conclusion, our findings suggest that the antibacterial mode of action of β-amyrin involves the induction of ROS, which resulted in apoptosis-like death in E. coli.
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Affiliation(s)
- Giyeol Han
- School of Life Sciences, BK 21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Dong Gun Lee
- School of Life Sciences, BK 21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea,Corresponding author Phone: +82-53-950-5373 Fax: +82-53-955-5522 E-mail:
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Xu W, Zhang H, Zhang Q, Xu J. β-Amyrin ameliorates diabetic nephropathy in mice and regulates the miR-181b-5p/HMGB2 axis in high glucose-stimulated HK-2 cells. Environ Toxicol 2022; 37:637-649. [PMID: 34894065 DOI: 10.1002/tox.23431] [Citation(s) in RCA: 6] [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: 08/09/2021] [Revised: 11/22/2021] [Accepted: 11/27/2021] [Indexed: 06/14/2023]
Abstract
Diabetic nephropathy (DN) is a diabetic complication that can cause renal failure. β-amyrin has been identified to possess anti-diabetic property. This study was designed to evaluate the potential role of β-amyrin in DN and its underlying mechanism. Streptozotocin-induced diabetic mice were used as the in vivo model, and high glucose (HG)-stimulated human proximal tubular HK-2 cells were utilized as the in vitro model. Renal histological changes in mice were assessed by hematoxylin-eosin and periodic acid-Schiff staining. HK-2 cell viability and apoptosis were detected by Cell Counting Kit-8 assay and flow cytometry analysis, respectively. β-amyrin was found to ameliorate kidney injury in DN mice and suppressed inflammatory response as well as apoptosis of HG-stimulated HK-2 cells. miR-181-5p expression in murine renal tissues and HK-2 cells was detected by in situ hybridization (ISH) and fluorescence in situ hybridization (FISH). MiR-181b-5p, a previously identified target for diabetic kidney disease, was downregulated in renal tissues and HG stimulated HK-2 cells, and β-amyrin induced the upregulation of miR-181b-5p. Binding relationship between miR-181b-5p and high mobility group box 2 (HMGB2) was confirmed by luciferase reporter assay. MiR-181b-5p bound to 3' untranslated region of HMGB2 to suppress its expression. As shown by immunohistochemical staining and immunofluorescence staining, HMGB2 was upregulated in the in vivo and in vitro models of DN, and β-amyrin induced the downregulation of HMGB2. Moreover, HMGB2 overexpression neutralized the suppressive effects of miR-181b-5p elevation on the inflammatory response and apoptosis of HG-treated HK-2 cells. Overall, β-amyrin ameliorates DN in mice and suppresses inflammatory response and apoptosis of HG-stimulated HK-2 cells via the miR-181b-5p/HMGB2 axis.
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Affiliation(s)
- Wenhua Xu
- Preventive Treatment Center, Shenzhen Hospital of Integrated Traditional Chinese and Western Medicine, Shenzhen, Guangdong, China
| | - Hongwu Zhang
- Department of Endocrinology, Shenzhen Hospital of Integrated Traditional Chinese and Western Medicine, Shenzhen, Guangdong, China
| | - Qinfeng Zhang
- Department of Endocrinology, Shenzhen Hospital of Integrated Traditional Chinese and Western Medicine, Shenzhen, Guangdong, China
| | - Jialan Xu
- Preventive Treatment Center, Shenzhen Hospital of Integrated Traditional Chinese and Western Medicine, Shenzhen, Guangdong, China
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Du MM, Zhu ZT, Zhang GG, Zhao YQ, Gao B, Tao XY, Liu M, Ren YH, Wang FQ, Wei DZ. Engineering Saccharomyces cerevisiae for Hyperproduction of β-Amyrin by Mitigating the Inhibition Effect of Squalene on β-Amyrin Synthase. J Agric Food Chem 2022; 70:229-237. [PMID: 34955018 DOI: 10.1021/acs.jafc.1c06712] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [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: 06/14/2023]
Abstract
The study aims to enhance β-amyrin production in Saccharomyces cerevisiae by peroxisome compartmentalization. First, overaccumulated squalene was determined as a key limiting factor for the production of β-amyrin since it could inhibit the activity of β-amyrin synthase GgbAs1. Second, to mitigate the inhibition effect, the enhanced squalene synthesis pathway was compartmentalized into peroxisomes to insulate overaccumulated squalene from GgbAs1, and thus the specific titer of β-amyrin reached 57.8 mg/g dry cell weight (DCW), which was 2.6-fold higher than that of the cytosol engineering strain. Third, by combining peroxisome compartmentalization with the "push-pull-restrain" strategy (ERG1 and GgbAs1 overexpression and ERG7 weakening), the production of β-amyrin was further increased to 81.0 mg/g DCW (347.0 mg/L). Finally, through fed-batch fermentation in a 5 L fermenter, the titer of β-amyrin reached 2.6 g/L, which is the highest reported to date. The study provides a new perspective to engineering yeasts as a platform for triterpene production.
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Affiliation(s)
- Meng-Meng Du
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
| | - Zhan-Tao Zhu
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
| | - Ge-Ge Zhang
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
| | - Yun-Qiu Zhao
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
| | - Bei Gao
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
| | - Xin-Yi Tao
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
| | - Min Liu
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
| | - Yu-Hong Ren
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
| | - Feng-Qing Wang
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
| | - Dong-Zhi Wei
- State Key Laboratory of Bioreactor Engineering, Newworld Institute of Biotechnology, East China University of Science and Technology, P.O. Box 311, 130 Meilong Road, Shanghai 200237, China
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Viet TD, Xuan TD, Anh LH. α-Amyrin and β-Amyrin Isolated from Celastrus hindsii Leaves and Their Antioxidant, Anti-Xanthine Oxidase, and Anti-Tyrosinase Potentials. Molecules 2021; 26:molecules26237248. [PMID: 34885832 PMCID: PMC8658892 DOI: 10.3390/molecules26237248] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/19/2021] [Accepted: 11/23/2021] [Indexed: 11/21/2022] Open
Abstract
Celastrus hindsii is a popular medicinal plant in Vietnam and Southeast Asian countries as well as in South America. In this study, an amount of 12.05 g of an α-amyrin and β-amyrin mixture was isolated from C. hindsii (10.75 g/kg dry weight) by column chromatography applying different solvent systems to obtain maximum efficiency. α-Amyrin and β-amyrin were then confirmed by gas chromatography-mass spectrometry (GC-MS), electrospray ionization-mass spectrometry (ESI-MS), and nuclear magnetic resonance (NMR). The antioxidant activities of the α-amyrin and β-amyrin mixture were determined via 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,20-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays with IC50 of 125.55 and 155.28 µg/mL, respectively. The mixture exhibited a high potential for preventing gout by inhibiting a relevant key enzyme, xanthine oxidase (XO) (IC50 = 258.22 µg/mL). Additionally, an important enzyme in skin hyperpigmentation, tyrosinase, was suppressed by the α-amyrin and β-amyrin mixture (IC50 = 178.85 µg/mL). This study showed that C. hindsii is an abundant source for the isolation of α-amyrin and β-amyrin. Furthermore, this was the first study indicating that α-amyrin and β-amyrin mixture are promising in future therapies for gout and skin hyperpigmentation.
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Henneh IT, Armah FA, Ameyaw EO, Biney RP, Obese E, Boakye-Gyasi E, Adakudugu EA, Ekor M. Analgesic Effect of Ziziphus abyssinica Involves Inhibition of Inflammatory Mediators and Modulation of K ATP Channels, Opioidergic and Nitrergic Pathways. Front Pharmacol 2021; 12:714722. [PMID: 34354595 PMCID: PMC8329242 DOI: 10.3389/fphar.2021.714722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/01/2021] [Indexed: 11/13/2022] Open
Abstract
The diversity offered by natural products has timelessly positioned them as a good source for novel therapeutics for the management of diverse medical conditions, including pain. This study evaluated hydro-ethanolic root bark extract of Ziziphus abyssinica (ZAE) as well as β-amyrin and polpunonic acid isolated from the plant for analgesic property. The study also investigated the mechanism responsible for this action in the extract. The antinociceptive potential of ZAE (30, 100, and 300 mg/kg, p. o.) was assessed using the tail-immersion test (TIT), acetic acid-induced writhing test (AAT), and formalin test (FT). The extract’s effect on acute and chronic musculoskeletal pain was also assessed by administering carrageenan unilaterally into the rat gastrocnemius muscles and measuring pain at 12 h and 10 days for acute and chronic pain respectively. The involvement of pro-inflammatory mediators (prostaglandin E2, bradykinin, TNF-α, and IL-1β) was assessed. The possible pathways mediating the observed analgesic effect of ZAE were further assessed using the antagonists: naloxone, glibenclamide, NG-L-nitro-arginine methyl ester (L-NAME), atropine, nifedipine, and yohimbine in the FT. Also the analgesic effect of two triterpenoid compounds, β-amyrin and polpunonic acid, previously isolated from the plant was assessed using the TIT. The anti-nociceptive activity of ZAE was demonstrated in the TIT by the significant (p < 0.05) increase in tail withdrawal threshold in ZAE-treated mice. ZAE also markedly reduced writhing and paw licking responses in both AAT and FT and significantly (p < 0.05) attenuated both acute and chronic musculoskeletal pain. ZAE also significantly reversed hyperalgesia induced by intraplantar injection of PGE2, bradykinin, TNF-α, and IL-1β. Furthermore, data revealed the involvement of opioidergic, ATP-sensitive K+ channels and NO-cGMP pathways in the analgesic effect of ZAE. Both β-amyrin and polpunonic acid exhibited analgesic activity in the tail suspension test. Our study demonstrates ZAE as an important source of new therapeutic agents for pain management.
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Affiliation(s)
- Isaac Tabiri Henneh
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Francis Ackah Armah
- Department of Biomedical Sciences, School of Allied Health Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Elvis Ofori Ameyaw
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Robert Peter Biney
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Ernest Obese
- School of Pharmacy and Pharmaceutical Sciences, University of Cape Coast, Cape Coast, Ghana
| | - Eric Boakye-Gyasi
- Department of Pharmacology, Faculty of Pharmacy and Pharmaceutical Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | | | - Martins Ekor
- Department of Pharmacology, School of Medical Sciences, University of Cape Coast, Cape Coast, Ghana
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Konarska A, Weryszko-Chmielewska E, Matysik-Woźniak A, Sulborska A, Polak B, Dmitruk M, Piotrowska-Weryszko K, Stefańczyk B, Rejdak R. Histochemical and Phytochemical Analysis of Lamium album subsp. album L. Corolla: Essential Oil, Triterpenes, and Iridoids. Molecules 2021; 26:molecules26144166. [PMID: 34299441 PMCID: PMC8306815 DOI: 10.3390/molecules26144166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 07/04/2021] [Accepted: 07/06/2021] [Indexed: 12/12/2022] Open
Abstract
The aim of this study was to conduct a histochemical analysis to localize lipids, terpenes, essential oil, and iridoids in the trichomes of the L. album subsp. album corolla. Morphometric examinations of individual trichome types were performed. Light and scanning electron microscopy techniques were used to show the micromorphology and localization of lipophilic compounds and iridoids in secretory trichomes with the use of histochemical tests. Additionally, the content of essential oil and its components were determined using gas chromatography-mass spectrometry (GC-MS). Qualitative analyses of triterpenes carried out using high-performance thin-layer chromatography (HPTLC) coupled with densitometric detection, and the iridoid content expressed as aucubin was examined with spectrophotometric techniques. We showed the presence of iridoids and different lipophilic compounds in papillae and glandular and non-glandular trichomes. On average, the flowers of L. album subsp. album yielded 0.04 mL/kg of essential oil, which was dominated by aldehydes, sesquiterpenes, and alkanes. The extract of the L. album subsp. album corolla contained 1.5 × 10-3 ± 4.3 × 10-4 mg/mL of iridoid aucubin and three triterpenes: oleanolic acid, β-amyrin, and β-amyrin acetate. Aucubin and β-amyrin acetate were detected for the first time. We suggest the use of L. album subsp. album flowers as supplements in human nutrition.
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Affiliation(s)
- Agata Konarska
- Department of Botany and Plant Physiology, University of Life Sciences, Akademicka 15, 20-950 Lublin, Poland; (A.K.); (E.W.-C.); (K.P.-W.)
| | - Elżbieta Weryszko-Chmielewska
- Department of Botany and Plant Physiology, University of Life Sciences, Akademicka 15, 20-950 Lublin, Poland; (A.K.); (E.W.-C.); (K.P.-W.)
| | - Anna Matysik-Woźniak
- Department of General Ophthalmology, Medical University of Lublin, Chmielna 1, 20-079 Lublin, Poland; (A.M.-W.); (R.R.)
| | - Aneta Sulborska
- Department of Botany and Plant Physiology, University of Life Sciences, Akademicka 15, 20-950 Lublin, Poland; (A.K.); (E.W.-C.); (K.P.-W.)
- Correspondence: (A.S.); (M.D.); Tel.: +48-81-445-65-79 (A.S.); +48-81-445-68-13 (M.D.)
| | - Beata Polak
- Department of Physical Chemistry, Medical University of Lublin, Chodźki 4A, 20-093 Lublin, Poland; (B.P.); (B.S.)
| | - Marta Dmitruk
- Department of Botany and Plant Physiology, University of Life Sciences, Akademicka 15, 20-950 Lublin, Poland; (A.K.); (E.W.-C.); (K.P.-W.)
- Correspondence: (A.S.); (M.D.); Tel.: +48-81-445-65-79 (A.S.); +48-81-445-68-13 (M.D.)
| | - Krystyna Piotrowska-Weryszko
- Department of Botany and Plant Physiology, University of Life Sciences, Akademicka 15, 20-950 Lublin, Poland; (A.K.); (E.W.-C.); (K.P.-W.)
| | - Beata Stefańczyk
- Department of Physical Chemistry, Medical University of Lublin, Chodźki 4A, 20-093 Lublin, Poland; (B.P.); (B.S.)
| | - Robert Rejdak
- Department of General Ophthalmology, Medical University of Lublin, Chmielna 1, 20-079 Lublin, Poland; (A.M.-W.); (R.R.)
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14
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Li M, Zhao M, Wei P, Zhang C, Lu W. Biosynthesis of Soyasapogenol B by Engineered Saccharomyces cerevisiae. Appl Biochem Biotechnol 2021; 193:3202-3213. [PMID: 34097255 DOI: 10.1007/s12010-021-03599-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 05/28/2021] [Indexed: 11/28/2022]
Abstract
Soyasapogenol B is an oleanane-type pentacyclic triterpene that has various applications in food and healthcare and has a higher biological activity than soyasaponin. Saccharomyces cerevisiae is a potential platform for terpenoid production with mature genetic tools for metabolic pathway manipulation. In this study, we developed a biosynthesis method to produce soyasapogenol B. First, we expressed β-amyrin synthase derived from Glycyrrhiza glabra in S. cerevisiae to generate β-amyrin, as the precursor of soyasapogenol B. Several different types of promoters were then used to regulate the expression of key genes in the mevalonate pathway (MVA), and this subsequently increased the yield of β-amyrin to 17.6 mg/L, 25-fold more than that produced in the original strain L01 (0.68 mg/L). Then, using the β-amyrin-producing strain, we expressed soyasapogenol B synthases from Medicago truncatula (CYP93E2 and CYP72A61V2) and from G. glabra (CYP93E3 and CYP72A566). Soyasapogenol B yields were then optimized by using soyasapogenol B synthases and cytochrome P450 reductase from G. glabra. The most effective soyasapogenol B production strain was used for fermentation, and the yield of soyasapogenol B reached 2.9 mg/L in flask and 8.36 mg/L in a 5-L bioreactor with fed glucose and ethanol. This study demonstrated the heterologous synthesis of soyasapogenol B in S. cerevisiae using the combined expression of CYP93E3 and CYP72A566 in the synthesis pathway, which significantly increased the production of soyasapogenol B and provides a reference method for the biosynthesis of other triterpenes.
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Affiliation(s)
- Man Li
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Mengya Zhao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Panpan Wei
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Chuanbo Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China.,Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin, People's Republic of China.,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, People's Republic of China
| | - Wenyu Lu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China. .,Key Laboratory of System Bioengineering (Tianjin University), Ministry of Education, Tianjin, People's Republic of China. .,SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, People's Republic of China.
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15
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Kumar SB, Krishna S, Pradeep S, Mathews DE, Pattabiraman R, Murahari M, Murthy TPK. Screening of natural compounds from Cyperus rotundus Linn against SARS-CoV-2 main protease (M pro): An integrated computational approach. Comput Biol Med 2021; 134:104524. [PMID: 34090015 PMCID: PMC8164362 DOI: 10.1016/j.compbiomed.2021.104524] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 05/22/2021] [Accepted: 05/22/2021] [Indexed: 01/10/2023]
Abstract
Coronavirus disease 2019 (COVID-19) is a viral respiratory disease that has been spreading across the globe. The World Health Organization (WHO) declared it as a public health emergency. The treatment of COVID-19 has been hampered due to the lack of effective therapeutic efforts. Main Protease (Mpro) is a key enzyme in the viral replication cycle and its non-specificity to human protease makes it a potential drug target. Cyperus rotundus Linn, which belongs to the Cyperaceae family, is a traditional herbal medicine that has been widely studied for its antiviral properties. In this study, a computational approach was used to screen natural compounds from C. rotundus Linn using BIOVIA Discovery Suite and novel potential molecules against Mpro of SARS-CoV-2 were predicted. Molecular docking was performed using LibDock protocol and selected ligands were further subjected to docking analysis by CDOCKER. The docking scores of the selected ligands were compared with standard antiretroviral drugs such as lopinavir and ritonavir to assess their binding potentials. Interaction pharmacophore analysis was then performed for the compounds exhibiting good binding scores to evaluate their protein–ligand interactions. The selected protein–ligand complexes were subjected to molecular dynamics simulation for 50 ns. Results of binding free energy analysis revealed that two compounds—β-amyrin and stigmasta-5,22-dien-3-ol—exhibited the best binding interactions and stability. Finally, absorption, distribution, metabolism, excretion, and toxicity (ADMET) studies were performed to understand the pharmacokinetic properties and safety profile of the compounds. The overall results indicate that the phytochemicals from Cyperus rotundus Linn, namely β-amyrin and stigmasta-5,22-dien-3-ol, can be screened as potential inhibitors of SARS-CoV-2 Mpro.
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Affiliation(s)
- S Birendra Kumar
- Department of Biotechnology, M. S. Ramaiah Institute of Technology, Bengaluru, 560054, Karnataka, India
| | - Swati Krishna
- Department of Biotechnology, M. S. Ramaiah Institute of Technology, Bengaluru, 560054, Karnataka, India
| | - Sneha Pradeep
- Department of Biotechnology, M. S. Ramaiah Institute of Technology, Bengaluru, 560054, Karnataka, India
| | - Divya Elsa Mathews
- Department of Biotechnology, M. S. Ramaiah Institute of Technology, Bengaluru, 560054, Karnataka, India
| | - Ramya Pattabiraman
- Department of Biotechnology, M. S. Ramaiah Institute of Technology, Bengaluru, 560054, Karnataka, India
| | - Manikanta Murahari
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, M. S. Ramaiah University of Applied Sciences, Bengaluru, 560054, Karnataka, India.
| | - T P Krishna Murthy
- Department of Biotechnology, M. S. Ramaiah Institute of Technology, Bengaluru, 560054, Karnataka, India.
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16
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Kwun MS, Lee HJ, Lee DG. β-amyrin-induced apoptosis in Candida albicans triggered by calcium. Fungal Biol 2021; 125:630-636. [PMID: 34281656 DOI: 10.1016/j.funbio.2021.03.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 03/25/2021] [Accepted: 03/29/2021] [Indexed: 12/26/2022]
Abstract
The emergence of drug-resistant pathogens has urged researchers to discover alternatives for traditional antibiotics. β-amyrin, which is included in the category of triterpenoids extracted from plants, is known for its antimicrobial activity, although the underlying mechanism has not yet been revealed. This study was conducted to elucidate the antifungal mode of action of β-amyrin against Candida albicans. Based on the relevance between triterpenoids and oxidative molecules, reactive oxygen species (ROS) concentrations were detected, which showed a noticeable increment. Disruption of Ca2+ homeostasis in the cytosol was additionally analyzed, which was supported by interactions between two. Subsequently, decrease in mitochondrial membrane potential, increment of mitochondrial Ca2+, and ROS concentration were monitored, which suggested mitochondrial dysfunction modulated by Ca2+. Further investigation confirmed oxidative damage through glutathione reduction and DNA fragmentation. Accumulation of lethal damages resulted in the activation of caspases and externalization of phosphatidylserine, indicating the induction of yeast apoptosis by β-amyrin in C. albicans.
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Affiliation(s)
- Min Seok Kwun
- School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu, 41566, South Korea
| | - Ha Jung Lee
- School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu, 41566, South Korea
| | - Dong Gun Lee
- School of Life Sciences, BK21 FOUR KNU Creative BioResearch Group, Kyungpook National University, Daegu, 41566, South Korea.
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17
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Ahmed AH, Abd Elkarim AS. Bioactive Compounds with Significant Anti- Rheumatoid Arthritis Effect Isolated for the First time from Leaves of Bougainvillea spectabilis. Curr Pharm Biotechnol 2020; 22:2048-2053. [PMID: 33372871 DOI: 10.2174/1389201021666201229111825] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 10/10/2020] [Accepted: 10/13/2020] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The aim of this work is to identify and purify bioactive compounds from 70℅ aqueous methanolic extract (AME) of B. spectabilis leaves collected in Cairo, Egypt and assessed their rheumatoid arthritis activity. METHODS The methanolic extract of B. spectabilis leaves was fractionated and subjected to different chromatographic techniques to isolate pure new compounds which were identified by one dimensional and two dimensional nuclear magnetic resonance (NMR) spectroscopic analyses and mass spectrometric methods. The isolated compounds were evaluated for their anti-inflammatory activity on adjuvant induced chronic rheumatoid arthritis. RESULTS & DISCUSSION Seven bioactive compounds were purified and identified for the first time from the methanolic extract of Bougainvillea spectabilis leaves; secologanin dimethyl acetal, α- and β-amyrin, α- and β-amyrin acetate, Kaempferol and kaempferol-3-O-rhamnoside. The previously mentioned compounds had a significant effect against rheumatoid arthritis. CONCLUSION The seven compounds isolated from the methanolic extract of B. spectabilis leaves showed strong anti-rheumatoid arthritis activity.
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Affiliation(s)
- Amal H Ahmed
- Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt
| | - Asmaa S Abd Elkarim
- Chemistry of Tanning Materials and Leather Technology, Department, National Research Centre, 33 El Bohouth st. (former EL Tahrir st.)-Dokki-Giza-Egypt-P.O.12622, Egypt
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18
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Chao EK, Qian GT, Sun MC, Su XY, Zhu ZH, Sheng W, Wang CX, Xue JP. [Regulation of β-mercuryl alcohol metabolic flow in Saccharomyces cerevisiae cells]. Zhongguo Zhong Yao Za Zhi 2020; 45:3819-3825. [PMID: 32893576 DOI: 10.19540/j.cnki.cjcmm.20200506.112] [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] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this study, citrate synthase gene(CIT2), and malate synthase gene(MLS1) were successfully knocked out in β-amyrin-producing yeast cells by using CRISPR/CAS9. The promoter of phosphoglucose isomerase gene(PGI1) was replaced by that of cytochrome c oxidase subunit Ⅶa(Cox9)to weaken its expression, aiming to channel more carbon flux into the NADPH-producing pathway. The fermentation results showed that CIT2 deletion had no effect on the β-amyrin production. Compared with the control strain, the production of β-amyrin was increased by 1.85 times after deleting MLS1, reaching into 3.3 mg·L~(-1). By replacing the promoter of PGI1, the β-amyrin yield was 3.75 times higher than that of the control strain, reaching up to 6.7 mg·L~(-1). This study successfully knocked out the CITT2 and MLS1 genes and weakened the PGI1 gene by using CRISPR/CAS9, which directly influenced the production of β-amyrin and provided some reference for the the metabolic engineering of triterpernoid producing strain.
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Affiliation(s)
- Er-Kun Chao
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Guang-Tao Qian
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Meng-Chu Sun
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Xin-Yao Su
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Zhi-Hui Zhu
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Wei Sheng
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China
| | - Cai-Xia Wang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Jian-Ping Xue
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China
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19
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Sun R, Gao JL, Chen H, Liu S, Tang ZZ. [CbCYP716A261, a New β-Amyrin 28-Hydroxylase Involved in Conyzasaponin Biosynthesis from Conyza blinii]. Mol Biol (Mosk) 2020; 54:813-825. [PMID: 33009791 DOI: 10.31857/s0026898420050092] [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: 02/08/2020] [Accepted: 03/13/2020] [Indexed: 06/11/2023]
Abstract
Conyzasaponins produced by the traditional Chinese herb Conyza blinii are oleanane-type saponins with a wide range of biological activities. Here, we identified a gene, designated CbCYP716A261, encoding a β-amyrin 28-hydroxylase in conyzasaponins biosynthesis. Ten full putative CYP sequences were isolated from Conyza blinii transcript tags. The CbCYP716A261 gene product was selected as the putative β-amyrin 28-hydroxylase by phylogenetic analysis and transcriptional activity analysis of methyl jasmonate-treated Conyza blinii. To identify the enzymatic activity, we performed enzymatic activity experiments in vitro and in vivo. The HPLC results revealed that CbCYP716A261 catalyzes the hydroxylation of β-amyrin at the C-28 position to yield oleanolic acid. Our findings provide new information about the conyzasaponin biosynthesis pathway and widen the list of isolated β-amyrin 28-hydroxylases.
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Affiliation(s)
- R Sun
- College of Life Science, Sichuan Agricultural University, Ya'an, Sichuan, 625014 China
- College of Biological and Chemical Engineering, Panzhihua University, Panzhihua, Sichuan, 617000 China
| | - J L Gao
- College of Biological and Chemical Engineering, Panzhihua University, Panzhihua, Sichuan, 617000 China
| | - H Chen
- College of Life Science, Sichuan Agricultural University, Ya'an, Sichuan, 625014 China
| | - S Liu
- College of Biological and Chemical Engineering, Panzhihua University, Panzhihua, Sichuan, 617000 China
| | - Z Z Tang
- College of Life Science, Sichuan Agricultural University, Ya'an, Sichuan, 625014 China
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20
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Park HJ, Kwon H, Lee JH, Cho E, Lee YC, Moon M, Jun M, Kim DH, Jung JW. β-Amyrin Ameliorates Alzheimer's Disease-Like Aberrant Synaptic Plasticity in the Mouse Hippocampus. Biomol Ther (Seoul) 2020; 28:74-82. [PMID: 31357749 PMCID: PMC6939697 DOI: 10.4062/biomolther.2019.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 06/13/2019] [Accepted: 06/17/2019] [Indexed: 01/26/2023] Open
Abstract
Alzheimer's disease (AD) is a progressive and most frequently diagnosed neurodegenerative disorder. However, there is still no drug preventing the progress of this disorder. β-Amyrin, an ingredient of the surface wax of tomato fruit and dandelion coffee, is previously reported to ameliorate memory impairment induced by cholinergic dysfunction. Therefore, we tested whether β-amyrin can prevent AD-like pathology. β-Amyrin blocked amyloid β (Aβ)-induced long-term potentiation (LTP) impairment in the hippocampal slices. Moreover, β-amyrin improved Aβ-induced suppression of phosphatidylinositol-3-kinase (PI3K)/Akt signaling. LY294002, a PI3K inhibitor, blocked the effect of β-amyrin on Aβ-induced LTP impairment. In in vivo experiments, we observed that β-amyrin ameliorated object recognition memory deficit in Aβ-injected AD mice model. Moreover, neurogenesis impairments induced by Aβ was improved by β-amyrin treatment. Taken together, β-amyrin might be a good candidate of treatment or supplement for AD patients.
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Affiliation(s)
- Hye Jin Park
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan 49315, Republic of Korea
| | - Huiyoung Kwon
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan 49315, Republic of Korea
| | - Ji Hye Lee
- Division of Endocrinology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Eunbi Cho
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan 49315, Republic of Korea
| | - Young Choon Lee
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan 49315, Republic of Korea.,Institute of Convergence Bio-Health, Dong-A University, Busan 49315, Republic of Korea
| | - Minho Moon
- Department of Biochemistry, College of Medicine, Konyang University, Daejeon 35365, Republic of Korea
| | - Mira Jun
- Institute of Convergence Bio-Health, Dong-A University, Busan 49315, Republic of Korea.,Department of Food Science and Nutrition, College of Health Sciences, Dong-A University, Busan 49315, Republic of Korea
| | - Dong Hyun Kim
- Department of Medicinal Biotechnology, College of Health Sciences, Dong-A University, Busan 49315, Republic of Korea.,Institute of Convergence Bio-Health, Dong-A University, Busan 49315, Republic of Korea
| | - Ji Wook Jung
- Department of Herbal Medicinal Pharmacology, College of Herbal Bio-industry, Daegu Haany University, Kyungsan 38610, Republic of Korea
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Liu H, Fan J, Wang C, Li C, Zhou X. Enhanced β-Amyrin Synthesis in Saccharomyces cerevisiae by Coupling An Optimal Acetyl-CoA Supply Pathway. J Agric Food Chem 2019; 67:3723-3732. [PMID: 30808164 DOI: 10.1021/acs.jafc.9b00653] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 05/06/2023]
Abstract
β-Amyrin is a plant-derived triterpenoid skeleton with wide applications in food and medical industry. β-Amyrin biosynthesis in Saccharomyces cerevisiae is derived from the mevalonate pathway with cytosolic acetyl-CoA as a precursor. In this work, endogenous and several heterologous acetyl-CoA synthesis pathways were coupled to β-amyrin production and a combinational acetyl-CoA supply route was demonstrated to be optimal due to more balanced redox cofactors, much lower energy consumption, and glucose utilization as well as significantly enhanced β-amyrin production (a 200% increase compared to the original β-amyrin-producing strain). Further disruption of an acetyl-CoA competing pathway led to a 330% increase in β-amyrin production as compared to the original strain. Finally, the engineered strain harboring the optimal pathway configuration achieved a final β-amyrin production of 279.0 ± 13.0 mg/L in glucose fed-batch fermentation, which is the highest as ever reported. This work provides an efficient platform for triterpenoid biosynthesis in Saccharomyces cerevisiae.
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Affiliation(s)
- Hu Liu
- Institute for Synthetic Biosystem, Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , China
| | - Jingjing Fan
- Institute for Synthetic Biosystem, Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , China
| | - Chen Wang
- Institute for Synthetic Biosystem, Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , China
| | - Chun Li
- Institute for Synthetic Biosystem, Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , China
- Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology , Tianjin University , Tianjin , 300072 , China
| | - Xiaohong Zhou
- Institute for Synthetic Biosystem, Department of Biochemical Engineering, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , China
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Sun MC, Chao EK, Su XY, Zhu M, Su Y, Qian GT, Chen SL, Wang CX, Xue JP. [Study of heterologous efficient synthesis of β-amyrin and high-density fermentation]. Zhongguo Zhong Yao Za Zhi 2019; 44:1341-1349. [PMID: 31090290 DOI: 10.19540/j.cnki.cjcmm.20190129.011] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this study, the synthetic pathway of β-amyrin was constructed in the pre-constructed Saccharomyces cerevisiae chassis strain Y0 by introducing β-amyrin synthase from Glycyrrhiza uralensis, resulting strain Y1-C20-6, which successfully produced β-amyrin up to 5.97 mg·L~(-1). Then, the mevalonate pyrophosphate decarboxylase gene(ERG19), mevalonate kinase gene(ERG12), 3-hydroxy-3-methylglutaryl-CoA synthase gene(ERG13), phosphomevalonate kinase gene(ERG8) and IPP isomerase gene(IDI1)were overexpressed to promoted the metabolic fluxto the direction of β-amyrin synthesis for further improving β-amyrin production, resulting the strain Y2-C2-4 which produced β-amyrin of 10.3 mg·L~(-1)under the shake flask fermentation condition. This is 100% higher than that of strain Y1-C20-6, illustrating the positive effect of the metabolic engineering strategy applied in this study. The titer of β-amyrin was further improved up to 157.4 mg·L~(-1) in the fed-batch fermentation, which was almost 26 fold of that produced by strain Y1-C20-6. This study not only laid the foundation for the biosynthesis of β-amyrin but also provided a favorable chassis strain for elucidation of cytochrome oxidases and glycosyltransferases of β-amyrin-based triterpenoids.
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Affiliation(s)
- Meng-Chu Sun
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China Institute of Chinese Medicine,China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Er-Kun Chao
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China Institute of Chinese Medicine,China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Xin-Yao Su
- Institute of Chinese Medicine,China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Min Zhu
- Institute of International Traditional Chinese Medicine Translational Medicine, Guangzhou University of Chinese Medicine Guangzhou 510000, China
| | - Yong Su
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China Institute of Chinese Medicine,China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Guang-Tao Qian
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China Institute of Chinese Medicine,China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Shi-Lin Chen
- Institute of Chinese Medicine,China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Cai-Xia Wang
- Institute of Chinese Medicine,China Academy of Chinese Medical Sciences Beijing 100700, China
| | - Jian-Ping Xue
- College of Life Sciences, Huaibei Normal University Huaibei 235000, China
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23
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Wei YD, Xiong C, Zhang TY, Gao H, Yin QG, Yao H, Sun W, Hu ZG, Chen SL. [Synthesis of triterpenoid saponins from Aesculus chinensis based on transcriptome data]. Zhongguo Zhong Yao Za Zhi 2019; 44:1135-1144. [PMID: 30989975 DOI: 10.19540/j.cnki.cjcmm.20190118.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Aesculus chinensis belongs to Hippocastanaceae family,bears medicinal and ornamental values. The oleanane type triterpenoid saponin aescin is regarded as active ingredient and accumulated in seed. In order to understand its molecular basis of the triterpenoid biosynthesis,we used high-throughput sequencing under Illumina Hi Seq 2000 platform to obtain the transcriptome data of seed and flower from A. chinensis to further mine the genes involved in its metabolic pathway. Unigene's de novo splicing was performed using Trinity software; the transcriptome results were annotated with KEGG database to predict the specific pathways of the aescin triterpenoid metabolism. Terpenoid and triterpenoid pathways were found from transcriptome data,and forty seven and twenty seven corresponding genes were uncovered respectively. It was found that there are eight kinds of enzymes related to the terpenoid metabolism pathway precursors and three kinds of enzymes related to the triterpenoid metabolism pathway. In this study,five genes corresponding to triterpene cyclase were analyzed in A. chinensis for the first time,which may participate in the synthesis of triterpenoid. It' s revealed that there were thirty three differential genes associated with the ko00900 and ko00909 pathways by analysis on the difference in transcriptome expression between seeds and flowers; seventeen unigenes were up-regulated and sixteen unigenes were down-regulated in the seeds relative to flowers. In this study, qRT-PCR experiments were used to verify the expression of three key enzyme genes of SQE( Unigene25806),HMGS( Unigene36710),and β-AS( Unigene33291). The results of qRT-PCR were consistent with the transcriptome data. The candidate genes related to triterpenoid saponin aescin synthesis in A. chinensis found in this study can provide theoretical basis for the metabolism synthesis and regulation of aescin.
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Affiliation(s)
- Yi-Ding Wei
- School of Pharmacy,Hubei University of Chinese Medicine Wuhan 430065,China Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Chao Xiong
- School of Pharmacy,Hubei University of Chinese Medicine Wuhan 430065,China Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Tian-Yuan Zhang
- Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Han Gao
- Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Qing-Gang Yin
- Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Hui Yao
- Institute of Medicinal Plant Development,Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100193,China
| | - Wei Sun
- Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
| | - Zhi-Gang Hu
- School of Pharmacy,Hubei University of Chinese Medicine Wuhan 430065,China
| | - Shi-Lin Chen
- School of Pharmacy,Hubei University of Chinese Medicine Wuhan 430065,China Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences Beijing 100700,China
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Ni J, Zhang G, Qin L, Li J, Li C. Simultaneously down-regulation of multiplex branch pathways using CRISPRi and fermentation optimization for enhancing β-amyrin production in Saccharomyces cerevisiae. Synth Syst Biotechnol 2019; 4:79-85. [PMID: 30949594 PMCID: PMC6428687 DOI: 10.1016/j.synbio.2019.02.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 02/19/2019] [Accepted: 02/19/2019] [Indexed: 11/04/2022] Open
Abstract
The production of β-amyrin in Saccharomyces cerevisiae is still low due to the inability of effectively regulating the endogenous metabolic pathway for competitive synthesis of β-amyrin precursors. In this study, we focused on two branches of β-amyrin synthetics pathway that consume β-amyrin precursors (2,3-oxidosqualene and cytosolic acetyl-CoA) and regulated related genes (ADH1, ADH4, ADH5, ADH6, CIT2, MLS2 and ERG7). We developed a CRISPRi method by constructing a multi-gRNA plasmid to down-regulate the seven genes simultaneously, which is reported for the first time in S. cerevisiae. The average transcription inhibition efficiency of the seven genes reached as high as 75.5%. Furthermore, by optimizing the fermentation condition (including pH, inoculum size, initial glucose concentration and feed of glucose or ethanol) and increasing extracellular transportation via supplying methyl-β-cyclodextrin, β-amyrin concentration of engineered strain SGibSdCg increased by 44.3% compared with the parent strain SGib, achieving 156.7 mg/L which was the highest concentration of β-amyrin reported in yeast. The one-step down-regulation of multiple genes using CRISPRi showed high efficiency and promising future in improving the yields of natural products. One step down-regulation of seven genes using CRISPRi was successfully realized in Saccharomyces cerevisiae. Highest reported yield of β-amyrin had obtained, which is 44.2% higher than initial strain. Exportation of intracellular β-amyrin was boosted by adding methyl-β-cyclodextrin.
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Affiliation(s)
- Jiangping Ni
- Institute for Synthetic Biosystem, Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 ZhongGuanCunNan Road, Beijing 100081, China
| | - Genlin Zhang
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China
| | - Lei Qin
- Institute for Synthetic Biosystem, Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 ZhongGuanCunNan Road, Beijing 100081, China
| | - Jun Li
- Institute for Synthetic Biosystem, Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 ZhongGuanCunNan Road, Beijing 100081, China
| | - Chun Li
- Institute for Synthetic Biosystem, Department of Biochemical Engineering, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 ZhongGuanCunNan Road, Beijing 100081, China
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Abstract
The synthesis of α- and β-amyrin was accomplished starting from easily accessible starting materials, oleanolic, and ursolic acid. The procedures allow the preparation of β-amyrin in an exceptionally short scalable manner via selective iodation and reduction. For α-amyrin, a different synthetic approach had to be chosen providing access to α-amyrin in medium-to-large scale.
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Affiliation(s)
- Immo Serbian
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany.
| | - René Csuk
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany.
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Fiallos-Jurado J, Pollier J, Moses T, Arendt P, Barriga-Medina N, Morillo E, Arahana V, de Lourdes Torres M, Goossens A, Leon-Reyes A. Saponin determination, expression analysis and functional characterization of saponin biosynthetic genes in Chenopodium quinoa leaves. Plant Sci 2016; 250:188-197. [PMID: 27457995 DOI: 10.1016/j.plantsci.2016.05.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [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: 11/20/2015] [Revised: 05/17/2016] [Accepted: 05/19/2016] [Indexed: 05/09/2023]
Abstract
Quinoa (Chenopodium quinoa Willd.) is a highly nutritious pseudocereal with an outstanding protein, vitamin, mineral and nutraceutical content. The leaves, flowers and seed coat of quinoa contain triterpenoid saponins, which impart bitterness to the grain and make them unpalatable without postharvest removal of the saponins. In this study, we quantified saponin content in quinoa leaves from Ecuadorian sweet and bitter genotypes and assessed the expression of saponin biosynthetic genes in leaf samples elicited with methyl jasmonate. We found saponin accumulation in leaves after MeJA treatment in both ecotypes tested. As no reference genes were available to perform qPCR in quinoa, we mined publicly available RNA-Seq data for orthologs of 22 genes known to be stably expressed in Arabidopsis thaliana using geNorm, NormFinder and BestKeeper algorithms. The quinoa ortholog of At2g28390 (Monensin Sensitivity 1, MON1) was stably expressed and chosen as a suitable reference gene for qPCR analysis. Candidate saponin biosynthesis genes were screened in the quinoa RNA-Seq data and subsequent functional characterization in yeast led to the identification of CqbAS1, CqCYP716A78 and CqCYP716A79. These genes were found to be induced by MeJA, suggesting this phytohormone might also modulate saponin biosynthesis in quinoa leaves. Knowledge of the saponin biosynthesis and its regulation in quinoa may aid the further development of sweet cultivars that do not require postharvest processing.
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Affiliation(s)
- Jennifer Fiallos-Jurado
- Laboratorio de Biotecnología Agrícola y de Alimentos, Ingeniería en Agroempresas, Colegio de Ciencias e Ingenierías, Universidad San Francisco de Quito, Campus Cumbayá, 17-1200-841 Quito, Ecuador; Laboratorio de Biotecnología Vegetal, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Campus Cumbayá, 17-1200-841 Quito, Ecuador
| | - Jacob Pollier
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
| | - Tessa Moses
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
| | - Philipp Arendt
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium; Inflammation Research Centre (IRC), VIB, 9052 Gent, Belgium; Department of Biochemistry and Microbiology, Ghent University, K.L. Ledeganckstraat 35, 9000 Gent, Belgium
| | - Noelia Barriga-Medina
- Laboratorio de Biotecnología Agrícola y de Alimentos, Ingeniería en Agroempresas, Colegio de Ciencias e Ingenierías, Universidad San Francisco de Quito, Campus Cumbayá, 17-1200-841 Quito, Ecuador
| | - Eduardo Morillo
- Instituto Nacional de Investigaciones Agropecuarias (INIAP), Estación Experimental Santa Catalina, Quito, Ecuador
| | - Venancio Arahana
- Laboratorio de Biotecnología Vegetal, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Campus Cumbayá, 17-1200-841 Quito, Ecuador
| | - Maria de Lourdes Torres
- Laboratorio de Biotecnología Vegetal, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Campus Cumbayá, 17-1200-841 Quito, Ecuador
| | - Alain Goossens
- Department of Plant Systems Biology, VIB, 9052 Gent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
| | - Antonio Leon-Reyes
- Laboratorio de Biotecnología Agrícola y de Alimentos, Ingeniería en Agroempresas, Colegio de Ciencias e Ingenierías, Universidad San Francisco de Quito, Campus Cumbayá, 17-1200-841 Quito, Ecuador.
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Shih MF, Cherng JY. Reduction of adhesion molecule production and alteration of eNOS and endothelin-1 mRNA expression in endothelium by Euphorbia hirta L. through its beneficial β-amyrin molecule. Molecules 2014; 19:10534-45. [PMID: 25045892 PMCID: PMC6271859 DOI: 10.3390/molecules190710534] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 07/03/2014] [Accepted: 07/11/2014] [Indexed: 12/27/2022] Open
Abstract
The inflammatory reaction in large blood vessels involves up-regulation of vascular adhesion molecules such as endothelial cell selectin (E-selectin), soluble vascular cell adhesion molecule (sVCAM)-1, and soluble intercellular adhesion molecule (sICAM)-1. These vascular dysfunctions are associated with the development of atherosclerosis. β-Amyrin, an active component of Euphorbia hirta L., has potent anti-inflammatory effects. So far, its preventive effects against the expression of inflammatory mediator-induced adhesion molecules have not been investigated. Endothelial cells (SVEC4-10 cell line) were treated with 50% RAW conditioned media (i.e., normal SVEC4-10 culture media contains 50% of lipopolysaccharide-activated macrophage culture media) without or with β-amyrin (0.6 and 0.3 µM). The production levels of E-selectin, sICAM-1, and sVCAM-1 in the SVEC4-10 cells were measured with ELISA assay kits. Under the same treatment conditions, expression of endothelin (ET)-1 and endothelial type of NO synthase (eNOS) mRNA were analyzed by RT-PCR and agarose gel. With β-amyrin, the 50% RAW conditioned media-induced E-selectin, sICAM-1, and sVCAM-1 levels as well as ET-1 gene expression were all suppressed. β-Amyrin treatment also restored the 50% RAW conditioned media-suppressed eNOS mRNA expression. These data indicate that β-amyrin is potentially useful in preventing chronic inflammation-related vascular diseases.
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Affiliation(s)
- Mei Fen Shih
- Department of Pharmacy, Chia-Nan University of Pharmacy & Science, Tainan 717, Taiwan.
| | - Jong Yuh Cherng
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi 621, Taiwan.
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