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Knany HR, Elsabbagh SA, Shehata MA, Eldehna WM, Bekhit AA, Ibrahim TM. In silico screening of SARS-CoV2 helicase using African natural products: Docking and molecular dynamics approaches. Virology 2023; 587:109863. [PMID: 37586235 DOI: 10.1016/j.virol.2023.109863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 07/19/2023] [Accepted: 08/03/2023] [Indexed: 08/18/2023]
Abstract
In the current medical era, there is an urgent necessity to identify new effective drugs to enrich the COVID-19's therapeutic arsenal. The SARS-COV-2 NSP13/helicase enzyme has been identified as a potential target for developing novel COVID-19 inhibitors. In this work, we aimed at endorsing effective natural products with potential inhibitory action towards the NSP13 through the virtual screening of 1012 natural products of botanical and marine origin from the South African Natural Compounds Database (SANCDB). The molecules were docked into the NTPase active site, and the best twelve compounds were chosen for further analysis. Thereafter, a combination of molecular dynamics simulations and MM-GBSA free energy calculations were carried out for a subset of best hits complexed with NSP13 helicase. We believe that the findings of this work will pave the way for additional research and experimental validation of some natural products as viable NSP13 helicase inhibitors.
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Affiliation(s)
- Hamada R Knany
- Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Egypt
| | - Sherif A Elsabbagh
- Biochemistry Department, Institute of Pharmacy, Eberhard-Karls University, Auf der Morgenstelle 8, 72076, Tuebingen, Germany
| | - Moustafa A Shehata
- Department of Zoology, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Wagdy M Eldehna
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt
| | - Adnan A Bekhit
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, 21521, Egypt; Cancer Nanotechnology Research Laboratory (CNRL), Faculty of Pharmacy, Alexandria University, Alexandria, 21521, Egypt; Pharmacy Program, Allied Health Department, College of Health and Sport Sciences, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain
| | - Tamer M Ibrahim
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt.
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Abebe MS, Asres K, Bekuretsion Y, Woldekidan S, Debebe E, Abebe A, Sisay B, Seyoum G. Toxic effect of Syzygium guineense ethanolic extract on female reproduction in rats: An evidence from a 10 week repeated-dose toxicity study. Heliyon 2023; 9:e17335. [PMID: 37383196 PMCID: PMC10293715 DOI: 10.1016/j.heliyon.2023.e17335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/10/2023] [Accepted: 06/14/2023] [Indexed: 06/30/2023] Open
Abstract
Introduction It has been reported that some herbal products affect reproduction. To date, reproductive toxicity of Syzygium guineense has not been investigated although the plant is widely used in treating fertility related problems. Thus, the objective of the current study was to investigate the toxic effects of 70% ethanol extract of S. guineense leaves on the reproductive function and histopathology of reproductive organs in female rats. Methods Eighty female Wistar albino rats were randomly divided into four groups where each group consisted of 20 rats. Rats in the first three groups were treated with S. guineense extract at doses of 250, 500 and 1000 mg/kg body weight, respectively. The fourth group served as a control group. The rats were treated for ten consecutive weeks. The length of estrous cycle, reproductive indices, pregnancy outcomes, and number of postnatal deaths were recorded. At necropsy, organ weight was measured, gross and histopathological examinations of ovaries, uterus, and vagina were conducted. Results Treatment of rats, with high dose (1000 mg/kg) of S. guineense, significantly prolonged the duration of estrous cycle and reduced weight of uterus and ovaries as well as the number of total and live birth pups. However, there were no significant changes observed in reproductive indices and gross morphology as well as histopathology of ovaries, uterus, and vagina. Conclusion Administration of high doses of S. guineense could be toxic to some aspects of the reproductive system of female rats and might also affect reproduction. Therefore, consuming high dose of S. guineense leaves is not recommended.
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Affiliation(s)
- Melese Shenkut Abebe
- Department of Anatomy, School of Medicine, College of Medicine and Health Science, Wollo University, Dessie, Ethiopia
| | - Kaleab Asres
- Department Pharmaceutical Chemistry and Pharmacognosy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Yonas Bekuretsion
- Department of Pathology, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Samuel Woldekidan
- Traditional and Modern Medicine Research Directorate, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Eyob Debebe
- Traditional and Modern Medicine Research Directorate, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Abiy Abebe
- Traditional and Modern Medicine Research Directorate, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Bihonegn Sisay
- Traditional and Modern Medicine Research Directorate, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Girma Seyoum
- Department of Anatomy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
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Huang JC, Xu HH, Shi Q, Lei C, Li JY, Hou AJ. Enantiomeric pairs of macrocyclic acylphloroglucinols from Syzygium szemaoense. Bioorg Chem 2023; 132:106381. [PMID: 36706532 DOI: 10.1016/j.bioorg.2023.106381] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 01/09/2023] [Accepted: 01/15/2023] [Indexed: 01/22/2023]
Abstract
Two enantiomeric pairs of macrocyclic acylphloroglucinols (1a/1b and 2a/2b) with an unprecedented carbon skeleton featuring a bicyclo[12.3.1]octadecane core, together with an undescribed biogenetically related long-chain acylphloroglucinol (3), were isolated from Syzygium szemaoense. Their structures were fully established by spectroscopic method, X-ray crystallographic analysis, and ECD calculation. Compounds 1b and 2a/2b exhibited inhibition against death-associated protein kinase-related apoptosis inducing protein kinase 2 (DRAK2) and ATP citrate lyase (ACLY), respectively.
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Affiliation(s)
- Jin-Chang Huang
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China; School of Pharmacy, Fudan University, Shanghai 201203, People's Republic of China
| | - Hong-Hong Xu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China
| | - Qing Shi
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China; School of Pharmacy, Fudan University, Shanghai 201203, People's Republic of China
| | - Chun Lei
- School of Pharmacy, Fudan University, Shanghai 201203, People's Republic of China
| | - Jing-Ya Li
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, People's Republic of China.
| | - Ai-Jun Hou
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China; School of Pharmacy, Fudan University, Shanghai 201203, People's Republic of China.
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Abdulrahman MD, Hama HA. Anticancer of genus Syzygium: a systematic review. EXPLORATION OF TARGETED ANTI-TUMOR THERAPY 2023; 4:273-293. [PMID: 37205310 PMCID: PMC10185443 DOI: 10.37349/etat.2023.00134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 01/30/2023] [Indexed: 05/21/2023] Open
Abstract
Aim One in eight fatalities globally are considered cancer-related. The need for cancer therapy is growing. Natural products continue to play a role in drug development, as up to 50% of authorized drugs in the last 30 years have been isolated from natural sources. Methods Anticancer, antioxidant, antibacterial, antifungal, antiviral, analgesic, anti-inflammatory, and other actions have all been reported in research papers using plants from the Syzygium genus in the treatment and prevention of disease. Results Results from the anticancer test showed that the genus, especially Syzygium aqueum, Syzygium samarangense, and Syzygium cumini had significant promise as an anticancer agent in vitro against several cancer cell lines. Numerous factors, including phytochemical composition, increased apoptotic activity, decreased cell proliferation, stopped angiogenesis, and reduced inflammation. Conclusions These results, despite preliminary, show promise for further purification and investigation of bioactive compounds and extracts within the genus Syzygium for their anticancer properties.
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Affiliation(s)
- Mahmoud Dogara Abdulrahman
- Biology Education Department, Faculty of Education, Tishk International University, Kurdistan Region, Erbil 44001, Iraq
- Correspondence: Mahmoud Dogara Abdulrahman, Biology Education Department, Faculty of Education, Tishk International University, Kurdistan Region, Erbil 44001, Iraq. ;
| | - Harmand A. Hama
- Biology Education Department, Faculty of Education, Tishk International University, Kurdistan Region, Erbil 44001, Iraq
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Prenatal Developmental Toxicity and Histopathological Changes of the Placenta Induced by Syzygium guineense Leaf Extract in Rats. J Toxicol 2022; 2022:5209136. [PMID: 36267160 PMCID: PMC9578917 DOI: 10.1155/2022/5209136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 10/07/2022] [Indexed: 11/17/2022] Open
Abstract
Many of the traditional herbal products are served to the consumer without proper efficacy and safety investigations. A laboratory-based experimental study was employed to investigate the toxic effects of Syzygium guineense leaf extract on the fetal development and histopathology of the placenta in rats. Fifty pregnant Wistar albino rats were randomly allocated into five groups, each consisting of 10 rats. S. guineense leaf extract, at doses of 250, 500, and 1000 mg/kg of body weight, was respectively administered to groups I-III rats. Groups four and five were control and ad libitum control, respectively. The number of resorptions, implantation sites, and live or dead fetuses was counted. The weight and crown-rump length of the fetuses were measured. The histopathological investigation of the placenta was conducted. Administration of 70% ethanol extract of S. guineense leaves reduced weight gain and food intake of pregnant rats at p value <0.05. The crown-rump length of the near-term rat fetus was significantly reduced in rats treated with 1000 mg/kg body weight of S. guineense extract (p value <0.05). The plant extract did not affect the number of implantations, fetal resorptions, live births, and stillbirths. The weight of the fetuses and the placentae also decreased dose-dependently. Decidual cystic degeneration was the most prevalent histopathological change observed in a rat's placenta treated with 1000 mg/kg body weight of S. guineense extract. Consumption of S. guineense leaves, especially at a high dose, may affect fetal development. Therefore, liberal use of S. guineense leaves during pregnancy should be avoided.
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Pfukwa TM, Pheiffer W, Fawole OA, Manley M, Mapiye C. Cellular antioxidant and viability efficacy of Harpephyllum caffrum peel and Syzygium guineense seed extracts. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Odukoya JO, Odukoya JO, Mmutlane EM, Ndinteh DT. Ethnopharmacological Study of Medicinal Plants Used for the Treatment of Cardiovascular Diseases and Their Associated Risk Factors in sub-Saharan Africa. PLANTS 2022; 11:plants11101387. [PMID: 35631812 PMCID: PMC9143319 DOI: 10.3390/plants11101387] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/04/2022] [Accepted: 04/06/2022] [Indexed: 12/16/2022]
Abstract
Cardiovascular diseases (CVDs) are the leading cause of global mortality, including deaths arising from non-communicable diseases in sub-Saharan Africa (SSA). Consequently, this study aimed to provide details of medicinal plants (MPs) employed in SSA for the treatment of CVDs and their related risk factors to open new avenues for the discovery of novel drugs. The extensive ethnopharmacological literature survey of these MPs in 41 SSA countries was based on studies from 1982 to 2021. It revealed 1,085 MPs belonging to 218 botanical families, with Fabaceae (9.61%), Asteraceae (6.77%), Apocynaceae (3.93%), Lamiaceae (3.75%), and Rubiaceae (3.66%) being the most represented. Meanwhile, Allium sativum L., Persea americana Mill., Moringa oleifera Lam., Mangifera indica L., and Allium cepa L. are the five most utilised plant species. The preferred plant parts include the leaves (36%), roots (21%), barks (14%), fruits (7%), and seeds (5%), which are mostly prepared by decoction. Benin, Mauritius, Nigeria, South Africa, and Togo had the highest reported use while most of the investigations were on diabetes and hypertension. Despite the nutraceutical advantages of some of these MPs, their general toxicity potential calls for caution in their human long-term use. Overall, the study established the need for governments of SSA countries to validate the efficacy/safety of these MPs as well as provide affordable, accessible, and improved modern healthcare services.
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Affiliation(s)
- Johnson Oluwaseun Odukoya
- Centre for Natural Products Research, Department of Chemical Sciences, University of Johannesburg, Doornfontein, P.O. Box 17011, Johannesburg 2028, South Africa;
- Department of Chemistry, The Federal University of Technology, Akure PMB 704, Ondo State, Nigeria
- Correspondence: (J.O.O.); (E.M.M.); Tel.: +27-679181492 (J.O.O.); +27-(0)-115593431 (E.M.M.)
| | - Julianah Olayemi Odukoya
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein, P.O. Box 17011, Johannesburg 2028, South Africa;
- Department of Food Science and Technology, Kwara State University, Malete, Ilorin PMB 1530, Kwara State, Nigeria
| | - Edwin Mpho Mmutlane
- Centre for Natural Products Research, Department of Chemical Sciences, University of Johannesburg, Doornfontein, P.O. Box 17011, Johannesburg 2028, South Africa;
- Correspondence: (J.O.O.); (E.M.M.); Tel.: +27-679181492 (J.O.O.); +27-(0)-115593431 (E.M.M.)
| | - Derek Tantoh Ndinteh
- Centre for Natural Products Research, Department of Chemical Sciences, University of Johannesburg, Doornfontein, P.O. Box 17011, Johannesburg 2028, South Africa;
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Swilam N, Nawwar MAM, Radwan RA, Mostafa ES. Antidiabetic Activity and In Silico Molecular Docking of Polyphenols from Ammannia baccifera L. subsp. Aegyptiaca (Willd.) Koehne Waste: Structure Elucidation of Undescribed Acylated Flavonol Diglucoside. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11030452. [PMID: 35161433 PMCID: PMC8840488 DOI: 10.3390/plants11030452] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 05/24/2023]
Abstract
Chemical investigation of the aerial parts of Ammania aegyptiaca ethanol extract (AEEE) showed high concentrations of polyphenol and flavonoid content, with notable antioxidant activity. Undescribed acylated diglucoside flavonol myricetin 3-O-β-4C1-(6″-O-galloyl glucopyranoside) 7-O-β-4C1-glucopyranoside (MGGG) was isolated from the aerial parts of AEEE, along with four known polyphenols that had not been characterized previously from AEEE. The inhibitory effects of MGGG, AEEE, and all compounds against α-amylase, pancreatic lipase and β-glucosidase were assessed. In addition, molecular docking was used to determine the inhibition of digestive enzymes, and this confirmed that the MGGG interacted strongly with the active site residues of these enzymes, with the highest binding free energy against α-amylase (-8.99 kcal/mol), as compared to the commercial drug acarbose (-5.04 kcal/mol), thus justifying its use in the potential management of diabetes. In streptozotocin (STZ)-induced diabetic rats, AEEE significantly decreased high serum glucose, α-amylase activity and serum liver and kidney function markers, as well as increasing insulin blood level. Moreover, AEEE improved the lipid profile of diabetic animals, increased superoxide dismutase (SOD) activity, and inhibited lipid peroxidation. Histopathological studies proved the decrease in pancreas damage and supported the biochemical findings. These results provide evidence that AEEE and MGGG possess potent antidiabetic activity, which warrants additional investigation.
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Affiliation(s)
- Noha Swilam
- Department of Pharmacognosy, Faculty of Pharmacy, The British University in Egypt (BUE), El Sherouk City 11837, Egypt
| | - Mahmoud A. M. Nawwar
- National Research Centre, Department of Phytochemistry and Plant Systematic, Dokki 12622, Egypt;
| | - Rasha A. Radwan
- Department of Biochemistry, Faculty of Pharmacy, Sinai University-Kantara Branch, El Ismailia 41611, Egypt;
| | - Eman S. Mostafa
- Department of Pharmacognosy, Faculty of Pharmacy, October University of Modern Sciences and Arts (MSA University), Giza 11787, Egypt;
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Huang JC, Liu YN, Tao YH, Chen BY, Lei C, Fu W, Li JY, Hu X, Hou AJ. Acylphloroglucinol derivatives with ATP citrate lyase inhibitory activities from Syzygium oblatum Wall. PHYTOCHEMISTRY 2021; 187:112765. [PMID: 33887558 DOI: 10.1016/j.phytochem.2021.112765] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/22/2021] [Accepted: 04/01/2021] [Indexed: 06/12/2023]
Abstract
Nine undescribed acylphloroglucinol derivatives, oblatones A-I, along with three known ones, were isolated from Syzygium oblatum. Their structures were determined on the basis of extensive spectroscopic analysis, including NMR and MS data interpretation. Oblatones A and B possess an alkylated chromanone scaffold featuring a hemiketal moiety. Oblatones C and D are the first acylphloroglucinol derivatives with an α,β-unsaturated ketone lipid chain. Some of the isolates showed inhibitory effects on ATP citrate lyase in vitro. The binding mode of oblatone A was predicted by molecular docking.
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Affiliation(s)
- Jin-Chang Huang
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Yi-Nan Liu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Yun-Hua Tao
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bai-Yu Chen
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Chun Lei
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Wei Fu
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Jing-Ya Li
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao Hu
- State Key Laboratory of New Drug and Pharmaceutical Process, Shanghai Institute of Pharmaceutical Industry, China State Institute of Pharmaceutical Industry, Shanghai, 201203, China.
| | - Ai-Jun Hou
- School of Pharmacy, Fudan University, Shanghai, 201203, China.
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Abebe MS, Asres K, Bekuretsion Y, Abebe A, Bikila D, Seyoum G. Sub-chronic toxicity of ethanol leaf extract of Syzygium guineense on the biochemical parameters and histopathology of liver and kidney in the rats. Toxicol Rep 2021; 8:822-828. [PMID: 33868962 PMCID: PMC8044796 DOI: 10.1016/j.toxrep.2021.03.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/28/2021] [Accepted: 03/31/2021] [Indexed: 11/29/2022] Open
Abstract
Long-term use of Syzygium guineense leaf extract reduced the food intake and weight gain in rats. The serum level of liver and kidney enzymes of rats was increased by the treatment of high dose of Syzygium guineense leaf. Use of Syzygium guineense leaf extract showed hypoglycemic effect in rats.
Background Syzygium guineense Wall. leaf is being used as a traditional medicine against hypertension and diabetes mellitus. Unlike its efficacy, the safety profile of this plant upon long-term administration has not been investigated yet. Therefore, this study investigated the sub-chronic toxicity of S. guineense leaves in rats. Methods Wistar albino rats, 10/sex/group were randomly assigned into four groups. Group I-III respectively received 250, 500, and 1000 mg/kg of body weight of 70 % ethanol extract ofS. guineense leaves for 90 consecutive days. Group IV (control) received distilled water. Throughout the experiment, clinical observations were carried out, food intake and weight of the rats also were measured. Finally, different biochemical parameters, organ weight, and histopathology of liver and kidneys were evaluated. Results Administration of 70 % ethanol extract ofS. guineense leaves decreased food intake and body weight gain of the test animals. Rats treated with 1000 mg/kg of S. guineense extract showed significantly increased serum alanine aminotransferase, aspartate aminotransferase, and alkaline phosphatase levels. Serum urea levels also increased in female rats treated with 500 and 1000 mg/kg body weight of S. guineense. Moreover, the blood glucose level of rats treated with 1000 mg/kg body weight was significantly decreased compared to the control group. However, the histology of the liver and kidneys were not significantly altered by any of the doses administered. Conclusion Administration ofS. guineense in rats at a dose of 1000 mg/kg body weight affected the food consumption, weight gain, and serum levels of liver and kidney enzymes suggesting that S. guineense intake at high doses may be toxic. Therefore, liberal consumption of S. guineense leaves should be taken curiously and cautiously.
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Key Words
- ALP, alkaline phosphatase
- ALT, alanine aminotransferase
- ANOVA, analysis of variance
- AST, aspartate aminotransferase
- Biochemical profile
- DPX, Dibutylphthalate Polystyrene Xylene
- EPHI, Ethiopian Public Health Institute
- H & E, hematoxylin and eosin
- IRB, institutional review board
- Kidney
- Liver
- OECD, Organization for Economic Co-operation and Development
- Rats
- SDM, standard deviation of mean SPSS: statistical package for social science
- Sub-chronic toxicity
- Syzygium guineense
- TMMRD, Traditional and Modern Medicine Research Directorate
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Affiliation(s)
- Melese Shenkut Abebe
- Department of Anatomy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Kaleab Asres
- Department Pharmaceutical Chemistry and Pharmacognosy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Yonas Bekuretsion
- Department of Pathology, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Abiy Abebe
- Traditional and Modern Medicine Research Directorate, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Demiraw Bikila
- National Clinical Chemistry Reference Laboratory, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Girma Seyoum
- Department of Anatomy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
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Teratogenic Effect of High Dose of Syzygium guineense (Myrtaceae) Leaves on Wistar Albino Rat Embryos and Fetuses. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:6677395. [PMID: 33833820 PMCID: PMC8012146 DOI: 10.1155/2021/6677395] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 03/13/2021] [Accepted: 03/16/2021] [Indexed: 01/06/2023]
Abstract
Syzygium guineense is an important medicinal plant effective against hypertension, diabetes mellitus, and cancer but with no evidence of its teratogenicity. This study was planned to investigate the teratogenic potential of S. guineense leaves on rat embryos and fetuses. Five groups of Wistar albino rats, each consisting of ten pregnant rats, were used as experimental animals. Groups I-III rats were treated with 250, 500, and 1000 mg/kg of hydroethanolic extract of S. guineense leaves, and groups IV and V were control and ad libitum control, respectively. Rats were treated during day 6–12 of gestation. Embryos and fetuses were retrieved at day 12 and day 20 of gestation, respectively. The embryos were assessed for developmental delays and growth retardation. The fetuses were examined for gross external, skeletal, and visceral anomalies. In 12-day old rat embryos, crown-rump length, number of somites, and morphological scores were significantly reduced by the treatment of 1000 mg/kg of the extract. The external morphological and visceral examinations of rat fetuses did not reveal any detectable structural malformations in the cranial, nasal, oral cavities, and visceral organs. The ossification centers of fetal skull, vertebrae, hyoid, forelimb, and hindlimb bones were not significantly varied across all groups. However, even if not statistically significant, high-dose treated rat fetuses had a reduced number of ossification centers in the sternum, caudal vertebrae, metatarsal, metacarpal, and phalanges. Treatment with the hydroethanolic extract of S. guineense leaves produced no significant skeletal and soft tissue malformations. The plant extract did not produce significant teratogenic effects on rat embryos/fetuses up to 500 mg/kg doses but retarded the growth of embryos at high dose (1000 mg/kg) as evidenced by decreased crown-rump length, number of somites, and morphological scores. Therefore, it is not advisable to take large doses of the plant during pregnancy.
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Katanaev VL, Blagodatski A, Xu J, Khotimchenko Y, Koval A. Mining Natural Compounds to Target WNT Signaling: Land and Sea Tales. Handb Exp Pharmacol 2021; 269:215-248. [PMID: 34455487 DOI: 10.1007/164_2021_530] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
WNT signaling plays paramount roles in organism development, physiology, and disease, representing a highly attractive target for drug development. However, no WNT-modulating drugs have been approved, with several candidates trudging through the early clinical trials. This delay instigates alternative approaches to discover WNT-modulating drugs. Natural products were the source of therapeutics for centuries, but the chemical diversity they offer, especially when looking at different taxonomic groups and habitats, is still to a large extent unexplored. These considerations urge researchers to screen natural compounds for the WNT-modulatory activities. Since several reviews on such endeavors exist, we here have attempted to present these efforts as "Land and sea tales" (citing the book title by Rudyard Kipling) superimposing them onto the traditional pipeline of drug discovery and early development. In doing so, we illustrate each step of the pipeline with case studies stemming from our own research. It will become obvious that several steps of the pipeline need to be modified when applied to natural products rather than to synthetic libraries. Yet the main message of this chapter is that natural compounds represent a powerful source for the WNT signaling modulators and can be developed towards drug candidates against WNT-dependent maladies.
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Affiliation(s)
- Vladimir L Katanaev
- Department of Cell Physiology and Metabolism, Faculty of Medicine, Translational Research Centre in Oncohaematology, University of Geneva, Geneva, Switzerland.
- School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia.
| | - Artem Blagodatski
- School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences Pushchino, Moscow, Russia
| | - Jiabin Xu
- Department of Cell Physiology and Metabolism, Faculty of Medicine, Translational Research Centre in Oncohaematology, University of Geneva, Geneva, Switzerland
| | - Yuri Khotimchenko
- School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia
- National Scientific Center for Marine Biology, Far Eastern Branch of Russian Academy of Sciences, Vladivostok, Russia
| | - Alexey Koval
- Department of Cell Physiology and Metabolism, Faculty of Medicine, Translational Research Centre in Oncohaematology, University of Geneva, Geneva, Switzerland
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Pfukwa TM, Chikwanha OC, Katiyatiya CL, Fawole OA, Manley M, Mapiye C. Southern African indigenous fruits and their byproducts: Prospects as food antioxidants. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.104220] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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14
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Aung EE, Kristanti AN, Aminah NS, Takaya Y, Ramadhan R. Plant description, phytochemical constituents and bioactivities of Syzygium genus: A review. OPEN CHEM 2020. [DOI: 10.1515/chem-2020-0175] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThis article attempts to report native growth, plant description, phytochemical constituents and bioactivities of Syzygium aqueum, S. aromaticum, S. cumini, S. guineense and S. samarangense. Those are the large public species in the Syzygium genus and some of them have been used as traditional medicines. Different parts (leaves, seeds, fruits, barks, stem barks and flower buds) of each species plant are rich in phytochemical constituents such as flavonoids, terpenoids, tannins, glycosides and phenolics. Antioxidant, antidiabetic, anticancer, toxicity, antimicrobial, anti-inflammatory and anthelmintic activities are reported in various extracts (methanol, ethanol and aqueous) from different parts of Syzygium sp. The bioactivities were studied by using 1,1-diphenyl-2-picrylhydrazyl and ferric reducing antioxidant power assays for antioxidant, 5-(3-carboxymethoxyphenyl)-2-(4,5-dimethyl-thiazoly)-3-(4-sulfophenyl) tetrazolium and 3-(4,5-dimethylthiazol-2-yl)-2-5-diphenyltetrazolium bromide assays for anticancer, α-glucosidase and α-amylase inhibition assays for antidiabetic, agar well diffusion method for antimicrobial and brine shrimp lethality assay for toxicity. Moreover, this review shows that phytochemical constituents of each species significantly presented various bioactivities. Therefore, this review suggests that there is great potential for obtaining the lead drug from these species.
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Affiliation(s)
- Ei Ei Aung
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Kampus C UNAIR, Jl. Mulyorejo, Surabaya, 60115, Indonesia
- Department of Chemistry, Yadanarbon University, Amarapura Township, Mandalay, Myanmar
| | - Alfinda Novi Kristanti
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Kampus C UNAIR, Jl. Mulyorejo, Surabaya, 60115, Indonesia
| | - Nanik Siti Aminah
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Kampus C UNAIR, Jl. Mulyorejo, Surabaya, 60115, Indonesia
| | - Yoshiaki Takaya
- Faculty of Pharmacy, Meijo University, Tempaku, Nagoya, Japan
| | - Rico Ramadhan
- Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Kampus C UNAIR, Jl. Mulyorejo, Surabaya, 60115, Indonesia
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15
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Novotna B, Polesny Z, Pinto-Basto MF, Van Damme P, Pudil P, Mazancova J, Duarte MC. Medicinal plants used by 'root doctors', local traditional healers in Bié province, Angola. JOURNAL OF ETHNOPHARMACOLOGY 2020; 260:112662. [PMID: 32147477 DOI: 10.1016/j.jep.2020.112662] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 02/06/2020] [Accepted: 02/06/2020] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE This study is one of the first post-civil war efforts to document traditional botanical knowledge in Bié province, central Angola, in a first step to bring more studies on the use of medicinal plant resources in this area so as to bring new insights into Angolan bio-cultural diversity. AIM OF THE STUDY Examine the variety of plant species used for medical purposes, as well as characterize their social and cultural values. Also, it is aimed to compare their uses in the studied region with those in Sub-Saharan Africa and report new ethnomedicinal uses. MATERIALS AND METHODS We documented traditional medicinal plant knowledge among professional herbalists in two areas in Bié province through participatory observation, semi-structured interviews and transect walks. Ethnobotanical information was quantified based on Use Reports to (1) rate traditional knowledge; and (2) determine most useful taxa. RESULTS In total, 10 traditional healers shared information on their knowledge. A total of 87 plant species distributed among 57 genera and 36 botanical families were documented with Fabaceae being the best-represented family with 18 species, followed by Phyllanthaceae (6), Apocynaceae (5), Asteraceae (5), Rubiaceae (5), Lamiaceae (4), and Ochnaceae (3). Most medicinal plants are usually gathered at a distance from human settlements because of the belief in the higher efficacy of 'wild' plants shared by all herbalists. Roots are the most common plant part used (79%), explaining why the consulted herbalists call themselves 'root doctors'. CONCLUSIONS The culturally most important medicinal species identified in this study, i.e. Securidaca longepedunculata, Garcinia huillensis, Annona stenophylla, Afzelia quanzensis and Strychnos cocculoides, were previously reported for the same use in neighbouring countries and elsewhere in Africa. Our study also indicates that there are several locally valuable species that have not yet been studied for their medical potential, to name a few: Alvesia rosmarinifolia, Diplorhynchus condylocarpon, Eriosema affine, Paropsia brazzaeana, Rhus squalida, Sclerocroton cornutus or Xylopia tomentosa. Moreover, the ethnomedicinal use of 26 species was reported for the first time to sub-Saharan Africa. CLASSIFICATION Ethnopharmacological field studies.
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Affiliation(s)
- Barbora Novotna
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha - Suchdol, Czech Republic; Department of General Anthropology, Faculty of Humanities, Charles University, U Kříže 8, 158 00, Praha 5, Jinonice, Czech Republic.
| | - Zbynek Polesny
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha - Suchdol, Czech Republic.
| | | | - Patrick Van Damme
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha - Suchdol, Czech Republic; Laboratory of Tropical and Subtropical Agronomy and Ethnobotany, Ghent University, Coupure Links 653, 9000, Ghent, Belgium.
| | - Petr Pudil
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha - Suchdol, Czech Republic.
| | - Jana Mazancova
- Department of Sustainable Technologies, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 00, Praha - Suchdol, Czech Republic.
| | - Maria Cristina Duarte
- CE3C - Center for Ecology, Evolution and Environmental Changes, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016, Lisboa, Portugal.
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16
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Liu L, Zhang L, Ren L, Xie Y. Advances in structures required of polyphenols for xanthine oxidase inhibition. FOOD FRONTIERS 2020. [DOI: 10.1002/fft2.27] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Liangliang Liu
- Institute of Bast Fiber Crops Chinese Academy of Agricultural Sciences Changsha 410205 China
| | - Li Zhang
- College of Chemistry and Materials Engineering Huaihua University Huaihua 418000 China
| | - Licheng Ren
- Institute of Bast Fiber Crops Chinese Academy of Agricultural Sciences Changsha 410205 China
- Department of Plastic and Cosmetic Surgery Shenzhen University General Hospital Shenzhen 518055 China
| | - Yixi Xie
- Institute of Bast Fiber Crops Chinese Academy of Agricultural Sciences Changsha 410205 China
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Xiangtan University Xiangtan 411105 China
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17
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Goenka S, Ceccoli J, Simon SR. Anti-melanogenic activity of ellagitannin casuarictin in B16F10 mouse melanoma cells. Nat Prod Res 2019; 35:1830-1835. [PMID: 31274002 DOI: 10.1080/14786419.2019.1636242] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Ellagitannins such as casuarictin (CAS), isolated from clove extracts, have been shown to have superior benefits such as antioxidant and anti-inflammatory activity, but there have been no reports on their capacity to inhibit melanogenesis. Inhibition of melanogenesis by novel natural products has gained attention for cosmetic applications such as skin lightening. Here, we report the effects of CAS on melanogenesis in B16F10 mouse melanoma cells. Our results showed that CAS (30 µM) significantly inhibited intracellular melanogenesis while being nontoxic to B16F10 cells or to HaCaT cells at that concentration. CAS (30 μM) also inhibited intracellular tyrosinase activity as well as mushroom tyrosinase activity; possessed robust copper chelating ability comparable to that of 500 µM kojic acid; and downregulated MITF protein levels, all of which contribute to the inhibitory mechanisms underlying its anti-melanogenic activity. In summary, our results demonstrate that CAS might hold promise as a depigmenting agent for hyperpigmentation disorders.
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Affiliation(s)
- Shilpi Goenka
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York, USA
| | | | - Sanford R Simon
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York, USA.,Department of Pathology, Stony Brook University, Stony Brook, New York, USA.,Department of Biochemistry and Cellular Biology, Stony Brook University, Stony Brook, New York, USA
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18
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Koval A, Pieme CA, Queiroz EF, Ragusa S, Ahmed K, Blagodatski A, Wolfender JL, Petrova TV, Katanaev VL. Tannins from Syzygium guineense suppress Wnt signaling and proliferation of Wnt-dependent tumors through a direct effect on secreted Wnts. Cancer Lett 2018; 435:110-120. [PMID: 30098400 DOI: 10.1016/j.canlet.2018.08.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 06/12/2018] [Accepted: 07/31/2018] [Indexed: 02/07/2023]
Abstract
Triple-negative breast cancer (TNBC) and colon cancer (CC) are two stigmatic examples of poorly treatable tumors, whose progression critically depends upon hyperactivation of the Wnt signaling. Development of specific anti-Wnt inhibitors is required to develop drugs against these and other Wnt-dependent cancers. Natural products, especially plants, have been used for the treatment of various diseases from ancient times. We examined extracts from several indigenous Cameroonian herbs and tested their effects on proliferation and Wnt signaling in TNBC and CC cells. Extracts from "fruit rouge", Syzygium guineense Wall. (Myrtaceae), demonstrated a strong activity against these cancer cells, as well as CC organoids. We found TNBC cells to significantly upregulate expression of Wnt3a, and the effects of S. guineense extracts on TNBC cell proliferation correlated with inhibition of the Wnt3a-induced β-catenin stabilization and transcriptional response. HPLC analysis revealed that the active components belong to tannins. We found a direct destabilizing effect of S. guineense extract on Wnt3a and other Wnt proteins, identifying a novel mechanism of action of tannins on the Wnt signaling pathway and cancer cell proliferation. Being edible, this African plant may have an important cancer-preventive nutritional value.
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Affiliation(s)
- Alexey Koval
- Department of Pharmacology and Toxicology, University of Lausanne, Switzerland
| | - Constant A Pieme
- Department of Pharmacology and Toxicology, University of Lausanne, Switzerland; Department of Biochemistry and Physiological Sciences, University of Yaounde I, Cameroon
| | | | - Simone Ragusa
- (d)Department of Oncology, Ludwig Cancer Research, Lausanne Branch, and Institute of Pathology, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Epalinges, Switzerland
| | - Kamal Ahmed
- Department of Pharmacology and Toxicology, University of Lausanne, Switzerland
| | - Artem Blagodatski
- Department of Pharmacology and Toxicology, University of Lausanne, Switzerland; School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia
| | | | - Tatiana V Petrova
- (d)Department of Oncology, Ludwig Cancer Research, Lausanne Branch, and Institute of Pathology, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Epalinges, Switzerland
| | - Vladimir L Katanaev
- Department of Pharmacology and Toxicology, University of Lausanne, Switzerland; School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia.
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Torres-León C, Ventura-Sobrevilla J, Serna-Cock L, Ascacio-Valdés JA, Contreras-Esquivel J, Aguilar CN. Pentagalloylglucose (PGG): A valuable phenolic compound with functional properties. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.07.045] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
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