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Antunes C, Arbo MD, Konrath EL. Hepatoprotective Native Plants Documented in Brazilian Traditional Medicine Literature: Current Knowledge and Prospects. Chem Biodivers 2022; 19:e202100933. [PMID: 35421282 DOI: 10.1002/cbdv.202100933] [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: 11/26/2021] [Accepted: 04/14/2022] [Indexed: 11/11/2022]
Abstract
The native flora of Brazil covers a large biodiversity of plants, some of which have important pharmacological properties. Ethnobotanical studies have established that the folk use of plants for hepatobiliary disorders is very common in Brazil. This review aimed to compile, describe and discuss the main native Brazilian medicinal plants used as hepatoprotective agents listed on 25 books by authors from various regions in the country. Based on the 153 species found, a comprehensive analysis of the most relevant scientific studies is presented, including Piper umbellatum, Echinodorus macrophyllus, Fevillea trilobata and Achyrocline satureioides. Some medicinal plants share both a large number of citations and scientific evidence to corroborate their hepatoprotective effects, including Solanum paniculatum, Baccharis crispa and Phyllanthus niruri, which could be of interest to develop new phytomedicines. Additionally, some active ingredients are indicated as being responsible for the liver protective effects described, particularly phenolic compounds (flavonoids, coumestans and lignans).
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Affiliation(s)
- Carolina Antunes
- Faculdade de Farmácia, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), 90610-000, Porto Alegre-RS, Brazil
| | - Marcelo Dutra Arbo
- Faculdade de Farmácia, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), 90610-000, Porto Alegre-RS, Brazil
| | - Eduardo Luis Konrath
- Faculdade de Farmácia, Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul (UFRGS), 90610-000, Porto Alegre-RS, Brazil
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Bardelčíková A, Miroššay A, Šoltýs J, Mojžiš J. Therapeutic and prophylactic effect of flavonoids in post-COVID-19 therapy. Phytother Res 2022; 36:2042-2060. [PMID: 35302260 PMCID: PMC9111001 DOI: 10.1002/ptr.7436] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 02/16/2022] [Accepted: 02/21/2022] [Indexed: 12/17/2022]
Abstract
The high incidence of post-covid symptoms in humans confirms the need for effective treatment. Due to long-term complications across several disciplines, special treatment programs emerge for affected patients, emphasizing multidisciplinary care. For these reasons, we decided to look at current knowledge about possible long-term complications of COVID-19 disease and then present the effect of flavonoids, which could help alleviate or eliminate complications in humans after overcoming the COVID-19 infection. Based on articles published from 2003 to 2021, we summarize the flavonoids-based molecular mechanisms associated with the post-COVID-19 syndrome and simultaneously provide a complex view regarding their prophylactic and therapeutic potential. Review clearly sorts out the outcome of post-COVID-19 syndrome according particular body systems. The conclusion is that flavonoids play an important role in prevention of many diseases. We suggest that flavonoids as critical nutritional supplements, are suitable for the alleviation and shortening of the period associated with the post-COVID-19 syndrome. The most promising flavonoid with noteworthy therapeutic and prophylactic effect appears to be quercetin.
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Affiliation(s)
- Annamária Bardelčíková
- Department of Pharmacology, Medical Faculty of University of Pavol Jozef Šafárik in Košice, Košice, Slovak Republic
| | - Andrej Miroššay
- Department of Pharmacology, Medical Faculty of University of Pavol Jozef Šafárik in Košice, Košice, Slovak Republic
| | - Jindřich Šoltýs
- Institute of Parasitology, Slovak Academy of Science, Košice, Slovak Republic
| | - Ján Mojžiš
- Department of Pharmacology, Medical Faculty of University of Pavol Jozef Šafárik in Košice, Košice, Slovak Republic
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Carvalho KR, Souza ASQ, Alves Filho EG, Silva LMA, Silva EO, A Pereira RDC, Zocolo GJ, de Brito ES, Silveira ER, Canuto KM. NIR and 1H qNMR methods coupled to chemometrics discriminate the chemotypes of the gastroprotective herb Egletes viscosa. Food Res Int 2020; 138:109759. [PMID: 33292941 DOI: 10.1016/j.foodres.2020.109759] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/15/2020] [Accepted: 09/25/2020] [Indexed: 11/28/2022]
Abstract
Egletes viscosa is a Brazilian medicinal herb consumed as flower bud tea due to its gastroprotective properties. This plant possesses two essential oil-based chemical varieties: trans-pinocarveyl acetate-rich chemotype A and cis-isopinocarveyl acetate- rich chemotype B. Therefore, we developed two simple, fast and reliable methods for discrimination of E. viscosa chemotypes using NIR and 1H qNMR spectroscopies combined with the chemometrics tools (iPLS and PLS-DA). Both methods showed high sensitivity, precision and specificity in the cross-validation tests. The NIR method has the advantages of being non-destructive and analyzable by portable devices, enabling its application for field and industrial evaluations. Meanwhile, the 1H qNMR method allows the quantification of the bioactive components ternatin, tanabalin, and centipedic acid. These aforementioned compounds were found higher in the chemotype A. Accordingly, our methods showed to be complimentary approaches for authenticity and/or quality control of E. viscosa-derived raw materials and herbal products.
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Affiliation(s)
- Kaline R Carvalho
- Embrapa Agroindústria Tropical, Fortaleza, CE, Brazil; Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Campus do Pici, Bloco 935, 60021-940 Fortaleza, CE, Brazil
| | | | - Elenilson G Alves Filho
- Departamento de Engenharia de Alimentos, Universidade Federal do Ceará, Campus do Pici, Bloco 858, 60440-900 Fortaleza, CE, Brazil
| | | | | | | | | | | | - Edilberto R Silveira
- Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Campus do Pici, Bloco 935, 60021-940 Fortaleza, CE, Brazil
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Rodrigues Carvalho K, Julião Zocolo G, Alves Pereira RDC, Chaves Custódio Martins FI, Vasconcelos Ribeiro PR, Sousa de Brito E, Rocha Silveira E, Marques Canuto K. Development of a UPLC-ESI-MS method for simultaneous determination of flavonoids and diterpenes in Egletes viscosa (L.) Less herbal products. J Pharm Biomed Anal 2019; 166:155-163. [DOI: 10.1016/j.jpba.2019.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 01/06/2019] [Accepted: 01/07/2019] [Indexed: 01/19/2023]
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Brito I, Bórquez J, Simirgiotis M, Cárdenas A. Crystal structure of 5-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3,7,8-trimethoxy-4 H-chromen-4-one, C 19H 18O 8. Z KRIST-NEW CRYST ST 2018. [DOI: 10.1515/ncrs-2017-0141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C19H18O8, monoclinic, P21/c (no. 14), a = 12.689(2) Å, b = 20.321(4) Å, c = 7.0820(13) Å, β = 105.368(13)°, V = 1760.8(6) Å3, Z = 4, R
gt = 0.0662, wR
ref(F
2) = 0.1788, T = 295 K.
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Affiliation(s)
- Iván Brito
- Departamento de Química, Facultad de Ciencias Básicas , Universidad de Antofagasta , Casilla 170, Antofagasta , Chile
| | - Jorge Bórquez
- Departamento de Química, Facultad de Ciencias Básicas , Universidad de Antofagasta , Casilla 170, Antofagasta , Chile
| | - Mario Simirgiotis
- Instituto de Farmacia, Facultad de Ciencias , Universidad Austral de Chile , casilla 567, Valdivia 5090000 , Chile
| | - Alejandro Cárdenas
- Departamento de Física, Facultad de Ciencias Básicas , Universidad de Antofagasta , Casilla 170, Antofagasta , Chile
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The association between drugs and herbal products: In vitro enhancement of the antibiotic activity by extracts of dry floral buttons of Egletes viscosa L. (macela). Eur J Integr Med 2015. [DOI: 10.1016/j.eujim.2015.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Melo JUDS, Melo RB, Santos JMV, Campos Júnior MM, Guimarães SB, Vasconcelos PRL. Effects of bioflavonoid ternatin on liver regeneration and oxidative stress in rats. Acta Cir Bras 2013; 28:435-40. [PMID: 23743681 DOI: 10.1590/s0102-86502013000600006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Accepted: 05/14/2013] [Indexed: 11/22/2022] Open
Abstract
PURPOSE To evaluate the effect of bioflavonoid ternatin (TRT) on rat liver regeneration and oxidative stress after 70% partial hepatectomy (PH). METHODS Thirty six young male Wistar rats were randomly assigned to two groups of 18 animals each - control (G1) and experimental (G2) - and were submitted to PH under inhalatory diethylether anesthesia. G1 rats received daily intraperitoneal (ip) injections of saline (NaCl 0.9% solution) 0.1 mL/kg for 14 days; G2 animals received daily ip injections of TRT 0.1% 1.0mg/kg for 14 days. At 36h (T1), 168h (T2) and 336h (T3) post-PH timepoints, a subgroup of six rats in each group was chosen in a randomized way to complementary hepatectomy (CH) and blood samples haversting. Collected material was saved for laboratory analysis (total bilirubin (TB), D-Glucose, glutathione (GSH) and thiobarbituric acid reactive substances (TBARS) and assessment of liver regeneration. RESULTS TRT induced a significant decrease in liver and plasma GSH concentrations; liver regeneration process was not affected. TRT promoted a significant decrease in blood glucose levels 168h after partial hepatectomy compared with controls. TB levels remained unchanged. CONCLUSION Intraperitoneal bioflavonoid ternatin injection in partially hepatectomized rats induces a decrease in oxidative stress and a significant hypoglycemic state, but does not promote any change in the evolution of liver regeneration.
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Al-Waili NS, Saloom KY, Al-Waili TN, Al-Waili AN, Akmal M, Al-Waili FS, Al-Waili HN. Influence of various diet regimens on deterioration of hepatic function and hematological parameters following carbon tetrachloride: a potential protective role of natural honey. Nat Prod Res 2006; 20:1258-64. [PMID: 17127519 DOI: 10.1080/14786410600906475] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The objective was to assess the effects of commercial regular diet as control, total food restriction with honey, commercial regular diet with dextrose, or total food restriction with dextrose, on blood variables after carbon tetrachloride (CCl4) administration. Sprague Dawley albino rats were divided into four groups, 10 rats each; Group 1 rats were on commercial regular diet, Group 2 rats were on commercial regular diet with 50% dextrose, Group 3 rats were on total food restriction with 50% dextrose, and Group 4 rats were on total food restriction with 50% honey. Rats in all the groups were i.m. administered CCL4 (2.4 mL kg b. wt.-1). Blood tests including ALT, AST, serum albumin, serum protein, BUN, blood glucose (BG), hemoglobin (Hb), and white blood cell (WBC) were performed before CCl4 administration and repeated after 48 and 96 h of post-injection. In Group 1, CCl4 caused significant elevation in AST and ALT, and decrease in BS, WBC, and BUN; lower elevation in AST and ALT at 48 h and decreased AST and ALT at 96 h were obtained when dextrose was added to commercial regular diet (Group 2). Using dextrose alone (Group 3), though there was significant elevation of AST and ALT and decrease in BUN and WBC as compared to baseline values, significant decrease in ALT, AST, and BUN as compared to control was obtained. During absolute honey feeding (Group 4), elevation in AST and ALT obtained, following CCl4 administration was significantly less than the values obtained in all other groups; with lower elevation in AST and ALT as compared to baseline values. Honey increased serum albumin, serum protein, BG, and caused lower reduction in Hb. Conclusively, exclusive honey feeding (50% concentration) significantly modifies and ameliorates biochemical and hematological changes obtained after CCl4 injection.
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Affiliation(s)
- Noori S Al-Waili
- Al-Waili's Charitable Foundation for Science and Trading, New York, USA.
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Pessoa C, Costa-Lotufo LV, Leyva A, de Moraes MEA, de Moraes MO. Anticancer potential of Northeast Brazilian plants. LEAD MOLECULES FROM NATURAL PRODUCTS - DISCOVERY AND NEW TRENDS 2006. [DOI: 10.1016/s1572-557x(05)02012-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Vieira MM, Macêdo FYB, Filho JNB, Costa ACLV, Cunha AN, Silveira ER, Brito GAC, Ribeiro RA. Ternatin, a flavonoid, prevents cyclophosphamide and ifosfamide-induced hemorrhagic cystitis in rats. Phytother Res 2004; 18:135-41. [PMID: 15022166 DOI: 10.1002/ptr.1379] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
To compare the classical uroprotective efficacy of mesna (2-mercaptoethanesulfonic acid) with ternatin (flavonoid isolated from Egletes viscosa Less.) in cyclophosphamide (CYP) and ifosfamide (IFS) induced hemorrhagic cystitis (HC). Male Wistar rats received an intraperitoneal injection of saline, CYP or IFS and were treated with saline or mesna, 5 min before, 4 and 8 h after CYP or IFS administration. In other animals, 1, 2 or 3 doses of mesna were replaced with ternatin or 3 doses of mesna were replaced with dimethylsulphoxide (DMSO), ternatin diluent. In an additional group, the last 2 doses of mesna were replaced with saline. HC was evaluated 24 h after CYP or IFS administration. CYP or IFS treatment induced marked changes in macroscopic and microscopic evaluation and in bladder wet weight (BWW), and these alterations were significantly inhibited by treatment with 3 doses of mesna, as well as by the replacement of 1 or 2 doses of mesna with ternatin. The replacement of 2 doses of mesna with saline or all doses of mesna with ternatin or DMSO did not prevent HC. In conclusion, the replacement of 1 or 2 doses of mesna with ternatin efficiently blocked CYP- or IFS-induced HC, however mesna is necessary for initial uroprotection.
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Affiliation(s)
- Milena Morais Vieira
- Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Brazil
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Al-Waili NS. Intravenous and Intrapulmonary Administration of Honey Solution to Healthy Sheep: Effects on Blood Sugar, Renal and Liver Function Tests, Bone Marrow Function, Lipid Profile, and Carbon Tetrachloride-Induced Liver Injury. J Med Food 2003; 6:231-47. [PMID: 14585190 DOI: 10.1089/10966200360716652] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Safety of intravenous (i.v.) or intrapulmonary administration of different concentrations of honey and their effects on blood sugar, renal and liver function tests, bone marrow function, lipid profile, and carbon tetrachloride (CCl(4))-induced liver damage were studied. Healthy sheep of either sex, 6-8 months old, were assigned randomly into the following groups: sheep received i.v. infusion of 5% honey in normal saline at 10-day intervals for 50 days and were compared with sheep that received 5% dextrose; sheep received higher doses of honey (50 g of honey) by i.v. infusion daily for 10 days; sheep received four higher doses of honey (80 g each dose) for 2 weeks; sheep received subcutaneous injection of CCl(4) after four doses of i.v. infusion of 80 g of honey, and estimations of serum gamma-glutamyl transpeptidase (SGGT), serum glutamic oxaloacetic transaminase (SGOT), and serum glutamate pyruvate transaminase (SGPT) were performed daily for 10 days postinjection; sheep received i.v. infusion of 40 g of honey, and blood sugar estimation was performed for 3 h at 30-min intervals after infusion and compared with sheep that received 5% dextrose; sheep received rapid i.v. injection of 40% honey or 40% dextrose, and blood sugar was estimated before and after injection; sheep received various concentrations of honey in distilled water (0.5 mL/1.5 mL, 0.75 mL/1.75 mL and 1.2 mL/2.2 mL), and blood sugar estimation was performed before and after inhalation. Results showed that i.v. or intrapulmonary administration of honey did not cause any adverse effect. Intravenous delivery of honey by slow infusion caused improvement of renal and hepatic function, bone marrow function, and lipid profile. It reduced SGOT, SGPT, triglyceride, cholesterol, blood urea nitrogen, and blood sugar and elevated serum protein, serum albumin, hemoglobin, white blood cell, and neutrophil percentage. Similar results were obtained with the use of higher doses of honey. CCl(4) caused mild elevation of SGPT and SGGT and lowering of SGOT in sheep that received repeated i.v. administration of honey before administration of CCl(4), whereas in control sheep CCl(4) caused significant elevation of all the liver enzymes. Intravenous infusion of 40 g of honey caused elevation of blood sugar for 90 min postinfusion, whereas it decreased blood sugar at 2 and 3 h postinfusion as compared with fasting blood sugar. Dextrose caused significant elevation of blood sugar at all time intervals. Similar results were obtained with the use of 10% dextrose or 80 g of honey. Addition of honey to dextrose caused less hyperglycemia as compared with dextrose alone. Acute injection of 20 mL of 40% dextrose significantly elevated blood sugar for 3 h postinjection, whereas little elevation in blood sugar was obtained after injection of 40% honey; the difference between honey and dextrose was significant. Inhalation of honey caused significant lowering of blood sugar during and after inhalation as compared with fasting blood sugar and water inhalation. The effect was greater with a higher concentration of inhaled honey. It might be concluded that slow i.v. infusion or rapid i.v. injection of honey in different concentrations was safe and could lower blood sugar and improve renal, hepatic, and bone marrow functions and lipid profile. Intravenous honey had a hepatoprotective effect against CCl(4)-induced liver injury. Inhaled honey was safe and reduced blood sugar significantly.
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Affiliation(s)
- Noori S Al-Waili
- Dubai Specialized Medical Center and Medical Research Laboratories, Islamic Establishment for Education, Dubai, United Arab Emirates.
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Pessoa C, Silveira ER, Lemos TL, Wetmore LA, Moraes MO, Leyva A. Antiproliferative effects of compounds derived from plants of Northeast Brazil. Phytother Res 2000; 14:187-91. [PMID: 10815012 DOI: 10.1002/(sici)1099-1573(200005)14:3<187::aid-ptr572>3.0.co;2-i] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Ten compounds derived from plants indigenous to Northeast Brazil were examined for antiproliferative effects on human cells in vitro. The effects of these phytochemicals on cell growth were determined by the MTT microtitre assay with 3-day continuous drug exposure. Three human cell lines were used: CEM leukaemia, SW1573 lung tumour and CCD922 normal skin fibroblasts. Four active compounds were found with IC(50) values less than 10 microg/mL in the two cancer cell lines. Oncocalyxones A and C, both 1,4-anthracenediones from Auxemma oncocalyx (Boraginaceae), showed cytotoxicity with mean IC(50) values of 0.8-2, 7-8 and 12-13 microg/mL against CEM, SW1573 and CCD922, respectively. One diterpene and one flavonoid, both from Egletes viscosa (Compositae), were also active. 12-Acetoxy-hawtriwaic acid lactone was cytotoxic with mean IC(50) values of 6, 10 and 10 microg/mL, respectively. 4,5-Dihydroxy-3,3,7, 8-tetramethoxy flavone (ternatin) was only growth-inhibitory with mean IC(50) values of 2, 1 and 10 microg/mL, respectively. These four most active compounds were examined further for their effects on DNA integrity and on DNA synthesis. All but ternatin caused substantial DNA damage and marked inhibition of 5-bromo-2'-deoxyuridine incorporation within 24 h. This study demonstrated the antiproliferative activity of four novel phytochemicals, three of which are DNA-reactive and inhibit DNA synthesis. Further studies are warranted to evaluate these compounds for antitumour potential.
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Affiliation(s)
- C Pessoa
- Department of Physiology and Pharmacology, Federal University of Ceara, P.O. Box 3157, 60430-270 Fortaleza, CE, Brazil
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Ram VJ, Goel A. Present status of hepatoprotectants. PROGRESS IN DRUG RESEARCH. FORTSCHRITTE DER ARZNEIMITTELFORSCHUNG. PROGRES DES RECHERCHES PHARMACEUTIQUES 1999; 52:53-101. [PMID: 10396126 DOI: 10.1007/978-3-0348-8730-4_2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Perpetual exposure of liver to xenobiotics and therapeutic agents leads to toxic manifestations of a complex and diverse nature. Not a single curative therapeutic agent has been found so far which could provide lasting remedy to patients suffering from hepatic disorders. In fact, the remedies available in the modern system of medicine provide only symptomatic relief without any significant changes on the disease process. Moreover, their use is associated with severe side effects and chances of relapses. Except some natural products claimed to be effective, no safe synthetic product is yet available for the management of hepatic disorders. Lack of effective, least toxic and curative hepatoprotectants made the task difficult to discover newer drugs. This review is an attempt to provide an overall view of the development of synthetic and natural products as hepatoprotective agents.
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Affiliation(s)
- V J Ram
- Medicinal Chemistry Division, Central Drug Research Institute, Lucknow, India
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Souza MF, Tomé AR, Rao VS. Inhibition by the bioflavonoid ternatin of aflatoxin B1-induced lipid peroxidation in rat liver. J Pharm Pharmacol 1999; 51:125-9. [PMID: 10217309 DOI: 10.1211/0022357991772222] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Aflatoxin B1, a metabolite of Aspergillus flavus is a potent hepatotoxic and hepatocarcinogenic mycotoxin. Lipid peroxidation and oxidative DNA damage are the principal manifestations of aflatoxin B1-induced toxicity which could be mitigated by antioxidants. Many plant constituents, e.g. flavonoids, lignans and spice principles (capsaicin, curcumin, eugenol, etc.) have been reported to prevent liver damage associated with lipid peroxidation. In this study we investigated ternatin, a tetramethoxyflavone isolated from Egletes viscosa, for possible protection against liver injury induced by aflatoxin B1 in rats. Seventy two hours after a single intraperitoneal dose of aflatoxin B1 (1 mg kg(-1)), the concentration of malondialdehyde, the product of lipid peroxidation in liver homogenates, and serum levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were significantly elevated (P<0.001). Subcutaneous ternatin (25 mg kg(-1)) pretreatment greatly reduced aflatoxin B1-induced increases in the levels of serum enzymes (ALT from 5071+/-763 to 293+/-66 international units L(-1) and AST from 4241+/-471 to 449+/-108 international units L(-1)) and elevated malondialdehyde levels (from 11.37+/-1.27 to 0.79+/-0.22 nmol (mg wet tissue)(-1)) in a manner similar to oral vitamin E (300 mg kg(-1)), a standard antioxidant. Further, histological changes induced by aflatoxin B1 such as hepatocellular necrosis and bile-duct proliferation were markedly inhibited in animals pretreated with ternatin or vitamin E. These data provide evidence that ternatin inhibits lipid peroxidation and affords protection against liver damage induced by aflatoxin B1. Ternatin might, therefore, be a suitable candidate for the chemoprevention of aflatoxicosis associated liver cancer.
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Affiliation(s)
- M F Souza
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
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Lima MA, Silveira ER, Marques MS, Santos RH, Gambardela MT. Biologically active flavonoids and terpenoids from Egletes viscosa. PHYTOCHEMISTRY 1996; 41:217-223. [PMID: 8588867 DOI: 10.1016/0031-9422(95)00473-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The steam volatile components from the hexane extract of dried flower buds of Egletes viscosa were identified by gas chromatography-mass spectrometry as trans-carvyl acetate, cis-carvyl acetate, sabinyl acetate, verbenyl acetate, cyclopentaethylidene, geranyl acetate and 5-methylfuranone, and trans-pinocarvyl acetate (major component). From the non-volatile residue, centipedic acid and a novel clerodane diterpene, 12-acetoxy-hawtriwaic acid lactone, were isolated. From the ethanol extract, ternatin (4',5-dihidroxy-3,3',7,8-tetramethoxyflavone), was isolated. Ternatin showed anti-inflammatory, hepatoprotection and gastroprotection properties, and, according to the NCI protocols, it showed moderate activity against HIV. The diterpenes showed antispasmodic activity. Structure determination of these secondary metabolites was accomplished by spectrometric methods, including 2D NMR, chemical interconversion and X-ray crystallographic analysis.
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Affiliation(s)
- M A Lima
- Curso de Pós-Graduação em Química Orgânica, Departamento de Química Orgânica e Inorgânica, Laboratório de Produtos Naturais, Universidade Federal do Ceará, Fortaleza, Brazil
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