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Silva de Carvalho V, Melo Lima KM, Calandrini de Azevedo LF, Panarra Ferreira Gomes das Neves PA, Borges RDS, Nagamachi CY, Pieczarka JC. New derivative of trans-dehydrocrotonin isolated from Croton cajucara shows reduced cytotoxic and genotoxic effects in hepatocellular carcinoma (HepG2) cell line. Toxicon 2022; 220:106940. [DOI: 10.1016/j.toxicon.2022.106940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/11/2022] [Accepted: 10/05/2022] [Indexed: 11/06/2022]
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Jünior SFP, Conserva LM, Filho JMB. Clerodane Diterpenes from Croton Species: Distribution and a Compilation of their 13C NMR Spectral Data. Nat Prod Commun 2019. [DOI: 10.1177/1934578x0600100410] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The present work is a review of the literature of clerodane diterpenes from Croton species. It contains a compilation of 13C NMR data of 83 of these diterpenoids and their biological activities. This review covers a period from 1969 to October 2005 and 224 references are cited.
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Affiliation(s)
| | - Lucia M. Conserva
- Departamento de Química, Universidade Federal de Alagoas, 57072-970, Maceió–AL, Brazil
| | - José Maria Barbosa Filho
- Laboratório de Tecnologia Farmacêutica, Universidade Federal da Paraíba, 58051-970, João Pessoa–PB, Brazil
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Islam MT, Streck L, de Alencar MVOB, Cardoso Silva SW, da Conceição Machado K, da Conceição Machado K, Gomes Júnior AL, Paz MFCJ, da Mata AMOF, de Castro E Sousa JM, da Costa Junior JS, Lins Rolim HM, da Silva-Junior AA, de Carvalho Melo-Cavalcante AA. Evaluation of toxic, cytotoxic and genotoxic effects of phytol and its nanoemulsion. CHEMOSPHERE 2017; 177:93-101. [PMID: 28284120 DOI: 10.1016/j.chemosphere.2017.02.145] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 02/24/2017] [Accepted: 02/27/2017] [Indexed: 06/06/2023]
Abstract
Phytol (PYT) is a diterpenoid having important biological activity. However, it is a water non-soluble compound. This study aims to prepare PYT nanoemulsion (PNE) and evaluation of toxic, cytotoxic and genotoxic activities of PYT and PNE. For this, the PNE was prepared by the phase inversion method. The cytotoxicity test was performed in Artemia salina, while toxicity, cytotoxicity and genotoxicity in Allium cepa at concentrations of 2, 4, 8 and 16 mM. Potassium dichromate and copper sulfate were used as positive controls for the tests of A. salina and A. cepa, respectively. In addition, an adaptation response was detected in A. cepa by using the comet assay. The results suggest that both PYT and PNE exhibited toxic and cytotoxic effects at 4-16 mM in either test system, while genotoxicity at 2-16 mM in A. cepa. PNE exhibited more toxic, cytotoxic and genotoxic effects at 8 and 16 mM than the PYT. However, both PYT and PNE at 2 and 4 mM decreased the index and frequency of damage in A. cepa after 48 and 72 h, suggesting a possible adaptation response or DNA damage preventing capacity. Nanoemulsified PYT (PNE) may readily cross the biological membranes with an increase in bioavailability and produce more toxic, cytotoxic and genotoxic effects in the used test systems.
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Affiliation(s)
- Muhammad Torequl Islam
- Northeast Biotechnology Network (RENORBIO), Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, 64.049-550, Brazil; Department of Pharmacy, Southern University Bangladesh, Mehedibag, Chittagong, 4000, Bangladesh.
| | - Leticia Streck
- Department of Pharmacy, Federal University of Rio Grande do Norte, 59012-570, Natal, RN, Brazil
| | | | - Samara Wanessa Cardoso Silva
- Northeast Biotechnology Network (RENORBIO), Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, 64.049-550, Brazil
| | - Kátia da Conceição Machado
- Northeast Biotechnology Network (RENORBIO), Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, 64.049-550, Brazil
| | - Keylla da Conceição Machado
- Northeast Biotechnology Network (RENORBIO), Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, 64.049-550, Brazil
| | - Antonio Luiz Gomes Júnior
- Northeast Biotechnology Network (RENORBIO), Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, 64.049-550, Brazil
| | - Márcia Fernanda Correia Jardim Paz
- Northeast Biotechnology Network (RENORBIO), Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, 64.049-550, Brazil
| | - Ana Maria Oliveira Ferreira da Mata
- Northeast Biotechnology Network (RENORBIO), Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, 64.049-550, Brazil
| | | | | | - Hercília Maria Lins Rolim
- Northeast Biotechnology Network (RENORBIO), Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, 64.049-550, Brazil
| | | | - Ana Amélia de Carvalho Melo-Cavalcante
- Northeast Biotechnology Network (RENORBIO), Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, 64.049-550, Brazil
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Lima GS, Castro-Pinto DB, Machado GC, Maciel MAM, Echevarria A. Antileishmanial activity and trypanothione reductase effects of terpenes from the Amazonian species Croton cajucara Benth (Euphorbiaceae). PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2015; 22:1133-1137. [PMID: 26547537 DOI: 10.1016/j.phymed.2015.08.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 08/22/2015] [Accepted: 08/23/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Leishmaniasis comprises several infectious diseases caused by protozoa parasites of Leishmania genus. In recent years, there has been a growing interest in the therapeutic use of natural products to treat parasitic diseases. Among them Croton cajucara Benth. (Euphorbiaceae) is a plant found in the Amazonian region with a history of safe use in folk medicine. PURPOSE The purpose of this study was to investigate the effects of clerodane diterpenes, trans-dehydrocrotonin (DCTN), trans-crotonin (CTN) and acetylaleuritolic acid (AAA) obtained from powdered bark of C. cajucara against promastigotes, axenic and intracellular amastigotes of Leishmania amazonensis. Furthermore, the effects of DCTN and CTN on the trypanotiona reductase enzyme were also investigated. The extraction of the terpenes was carried out as previously reported (Maciel et al., 1998; 2003). METHODS The effect of the isolated compounds (DCTN, CTN and AAA) from the bark of C. cajucara was assessed in vitro against promastigotes, axenic amastigotes and intracellular amastigotes of L. amazonensis by counting of remaining parasites in a Neubauer chamber in comparison to pentamidine used as standard drug. The action of natural products on trypanothione reductase was assessed using soluble protein fraction of promastigotes. The assays were performed by incubation with HEPES, EDTA, NADPH and trypanothione disulfide to quantify the NAPH consumption by TryR. RESULTS The results showed very high efficacy, especially of the diterpene DCTN, against promastigotes (IC50 = 6.30 ± 0.06 µg/ml) and axenic amastigotes (IC50 = 19.98 ± 0.05 µg/ml) of L. amazonenesis. The cytotoxic effect of the best active natural product was evaluated on mouse peritoneal infected macrophages (IC50 = 0.47 ± 0.03 µg/ml in 24 h of culture), and the treatment revealed that DCTN never reaches toxic concentrations while reducing the infection and, most importantly, with no toxicity (>100 µg/ml with 0% of macrophage kill) when compared to pentamidine (37.5 µg/ml with 100% of macrophage kill). Furthermore, all of the natural products assayed on the trypanothione reductase enzyme inhibited the enzyme activity compared to the control. CONCLUSION Clerodane diterpenes from C. cajucara showed promising in vitro antileishmanial effects against L. amazonensis, specially the DCTN with no macrophage toxicity up to the assayed concentration. In addition, the action on trypanothione reductase enzyme revealed a possible mechanism of action.
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Affiliation(s)
- Gerson S Lima
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil; Biomanguinhos, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Denise B Castro-Pinto
- Laboratório de Bioquímica de Tripanossomatídeos, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Gerzia C Machado
- Laboratório de Bioquímica de Tripanossomatídeos, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, RJ, Brazil
| | - Maria A M Maciel
- Universidade Potiguar Laureate International Universities, Programa de Pós-graduação em Biotecnologia, Campus Salgado Filho, Natal-RN, Brazil; Universidade Federal do Rio Grande do Norte, Instituto de Química, Campus Lagoa Nova, Natal-RN, Brazil
| | - Aurea Echevarria
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil.
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Treatment with aqueous extract from Croton cajucara Benth reduces hepatic oxidative stress in streptozotocin-diabetic rats. J Biomed Biotechnol 2012; 2012:902351. [PMID: 22811599 PMCID: PMC3395422 DOI: 10.1155/2012/902351] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Revised: 05/01/2012] [Accepted: 05/07/2012] [Indexed: 12/13/2022] Open
Abstract
Croton cajucara Benth is a plant found in Amazonia, Brazil and the bark and leaf infusion of this plant have been popularly used to treat diabetes and hepatic disorders. The present study was designed to evaluate the oxidative stress as well as the therapeutic effect of Croton cajucara Benth (1.5 mL of the C. cajucara extract i.g.) in rats with streptozotocin-induced diabetes. Croton cajucara Benth was tested as an aqueous extract for its phytochemical composition, and its antioxidant activity in vitro was also evaluated. Lipid peroxidation and superoxide dismutase, catalase, and glutathione reductase activities were measured in the hepatic tissue, as well as the presence activation of p65 (NF-κB), through western blot. Phytochemical screening of Croton cajucara Benth detected the presence of flavonoids, coumarins and alkaloids. The extract exhibited a significant antioxidant activity in the DPPH-scavenging and the hypoxanthine/xanthine oxidase assays. Liver lipid peroxidation increased in diabetic animals followed by a reduction in the Croton-cajucara-Benth-treated group. There was activation of p65 nuclear expression in the diabetic animals, which was attenuated in the animals receiving the Croton cajucara Benth aqueous extract. The liver tissue in diabetic rats showed oxidative alterations related to the streptozotocin treatment. In conclusion the Croton cajucara Benth aqueus extract treatment effectively reduced the oxidative stress and contributed to tissue recovery.
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Rodrigues G, Marcolin E, Bona S, Porawski M, Lehmann M, Marroni NP. Hepatics alterations and genotoxic effects of Croton cajucara Benth (SACACA) in diabetic rats. ARQUIVOS DE GASTROENTEROLOGIA 2011; 47:301-5. [PMID: 21140094 DOI: 10.1590/s0004-28032010000300017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2009] [Accepted: 08/27/2009] [Indexed: 11/21/2022]
Abstract
CONTEXT Croton cajucara Benth is a plant found in Amazonia, Brazil and the bark and leaf infusions of this plant have been popularly used to treat diabetes and hepatic disorders. OBJECTIVES This study investigated effects hepatics alterations and genotoxic and antidiabetic effect of Croton cajucara Benth bark extracts treatment in streptozotocin-induced diabetic rats. METHODS Male Wistar rats were divided into six groups: control rats; control rats treated with Croton cajucara Benth extract during 5 and 20 days; diabetic rats, and diabetic rats treated with Croton cajucara Benth during 5 and 20 days. Diabetes was induced by a single intraperitoneal injection of streptozotocin (70 mg/kg). Eight weeks later we measured glucose, triglyceride, cholesterol and hepatic transaminases on blood. The bone marrow micronucleus assay was used to assess the genotoxic activity of Croton cajucara Benth. RESULTS Treatment with aqueous extrat of Croton cajucara was able to significantly reduce levels of triglycerides in diabetic animals, however, did not modify significantly the levels of glucose and cholesterol in these animals. There was no significant elevation in liver transaminases in the control group treated with Croton cajucara Benth, as there was no genotoxic effect of treatment in this model. Our results did not show a significant effect on glucose and cholesterol reduction, the treatment was able to significantly reduce triclycerides plasmatic level. There was no significant alterations on hepatic transferase in the animals from the control group treated with Croton cajucara Benth. It was observed no genotoxic effect of the treatment in the model studied. CONCLUSION In this study Croton cajucara bark extract showed absence of hepatotoxicity in this animal model and presented a hypolipidemic activity, and could be used to reverse dyslipidemia associated with diabetes and to prevent the cardiovascular complications that are very prevalent in diabetic patients.
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Campos MCO, Salomão K, Castro-Pinto DB, Leon LL, Barbosa HS, Maciel MAM, de Castro SL. Croton cajucara crude extract and isolated terpenes: activity on Trypanosoma cruzi. Parasitol Res 2010; 107:1193-204. [DOI: 10.1007/s00436-010-1988-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2010] [Accepted: 07/14/2010] [Indexed: 11/30/2022]
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Ahmad R, Khan AV, Siddiqui MF, Hasnain AU. Effects of an aqueous extract of Croton bonplandianum Baill in rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2008; 26:336-341. [PMID: 21791385 DOI: 10.1016/j.etap.2008.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Revised: 06/25/2008] [Accepted: 06/29/2008] [Indexed: 05/31/2023]
Abstract
We have investigated the cytotoxic and biochemical effects of injecting aqueous phytoextract of Croton bonplandianum (Baill) leaves in male rats. Subchronic dosages of 3.25, 4.65 and 6.97mgphytoextractg(-1)b.wt.week(-1) were administered to rats. To test ameliorative effects, rats were injected with phytoextract mixed with 0.2mgg(-1)b.wt. of cyclophosphamide. Positive controls received only cyclophosphamide, while negative control groups were kept on normal diet and water. Our results demonstrate that phytoextract did not induce micronuclei formation in rats and shows insignificant amelioration (P<0.05). However, differences in serum LDH isoenzymes, ALP, SGOT, SGPT activities and bilirubin were remarkable and displayed dose as well as duration dependent variations. The most outstanding observation of this study was the release of cardiac TnI in sera of rats injected with 6.97mgg(-1)b.wt. of phytoextract for 21 days. Our findings suggest that at the highest concentrations used here phytoextract of C. bonplandianum is not clastogenic; instead it is cardio- and hepatotoxic.
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Affiliation(s)
- Riaz Ahmad
- Section of Genetics, Department of Zoology, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002 Uttar Pradesh, India
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Morais WA, Costa MP, Paixão ADO, Maciel MAM, Santos-Magalhães NS. Encapsulation and release characteristics of DCTN/PLGA microspheres. J Microencapsul 2008; 26:529-34. [PMID: 18855199 DOI: 10.1080/02652040802476310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In the present study, poly (D,L-lactic-co-glycolic)-acid microspheres containing trans-Dehydrocrotonin (DCTN) were prepared by the double emulsion method. The hypoglycemic activity of DCTN-loaded microspheres was monitored in normal glycemic mice after administration of a daily dose of DCTN (50 mg kg(-1) body weight) for 7 days. Spherical microspheres with two populations of particles with 3.20 +/- 0.10 and 7.60 +/- 0.70 microm mean diameter size microm were observed. The encapsulation efficiency of DCTN was 85.5 +/- 3.9%. The in vitro kinetic profile of DCTN from PLGA-microspheres was initially fast (burst effect of 19.4% at 2 h). Such a burst step was maintained until achieving 35.7+/-2.0% at 7h, followed by a gradual release of DCTN attaining a maximum drug release at 55.7 +/- 2.6% within 30 h. DCTN was able to reduce glucose levels (14.3%) of normal glycemic animals and this effect was improved by its encapsulation into microspheres (26.8%). The optimum glucose levels in the blood of animals treated with DCTN suspension and DCTN-loaded microspheres were 119.21 +/- 19.75 mg dL(-1) at day 5 and 103.08 +/- 18.88 mg dL(-1) at day 7, respectively. DCTN-loaded microspheres are thus offered as a potential delivery system for the treatment of metabolic diseases characterized by hyperglycemia.
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Affiliation(s)
- Waldenice A Morais
- Universidade Federal de Pernambuco (UFPE), Laboratório de Imunopatologia Keizo-Asami (LIKA), Recife, PE, Brazil
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Poersch A, dos Santos FV, Maciel MAM, de Câmara JKP, de Castro Dantas TN, de Syllos Cólus IM. Protective effect of DCTN (trans-dehydrocrotonin) against induction of micronuclei and apoptosis by different mutagenic agents in vitro. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2007; 629:14-23. [PMID: 17276134 DOI: 10.1016/j.mrgentox.2007.01.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2005] [Revised: 12/14/2006] [Accepted: 01/02/2007] [Indexed: 11/27/2022]
Abstract
The use of medicinal plants to combat diseases has increased in the last years despite the little information available with regard to the possible health risks they represent. The aim of the present study was to determine in vitro the possible clastogenic, apoptotic and cytotoxic effects of the active principle of Croton cajucara, trans-dehydrocrotonin (DCTN), and determine its protective effect against three mutagenic agents using the micronucleus test (MN) and apoptosis index in CHO-K1 cells. Three DNA damage inducing agents were utilized in the clastogenicity and anticlastogenicity tests (methylmethane sulfonate (MMS), mitomycin C (MMC) and doxorubicin (DXR); a negative control (PBS) and solvent control were also included. DCTN at concentrations of 400, 320, 240, 160 and 80microM did not show clastogenic activity in cultured CHO-K1 cells in the micronucleus test, did not induce apoptosis and showed negligible cytotoxicity in all cases. DCTN at concentrations of 240 and 400microM was tested for protective activity using three treatment protocols in relation to positive controls: pre-treatment, simultaneous treatment and post-treatment. The micronucleus test showed a protective effect for DCTN which varied among the different treatment protocols and with regard to the different DNA damage inducing agents. In the apoptosis test, DCTN was seen to have a protective effect under the following conditions: (I) at both concentrations in relation to MMS, in all three treatment protocols; (II) at both concentrations against damage caused by MMC with pre-treatment and at the higher concentration with simultaneous treatment; (III) at both concentrations against DXR with simultaneous treatment. Therefore, DCTN itself is not a clastogenic or cytotoxic substance, and does not induce apoptosis the in vitro system used. These results together with findings reported for DCTN in vivo, support the indication of this active principle at these concentrations for therapeutic use.
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Affiliation(s)
- Aline Poersch
- Departamento de Biologia Geral, CCB, Centro de Ciências Biológicas, Universidade Estadual de Londrina (UEL), Campus Universitário, CEP 86051.970 - Londrina (PR), Brazil
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Santos FV, Mesquita SF, Faria MJS, Poersh A, Maciel MAM, Pinto AC, Morimoto HK, Cólus IMS. Absence of mutagenicity in somatic and germ cells of mice submitted to subchronic treatment with an extract of Croton cajucara Benth. (Euphorbiaceae). Genet Mol Biol 2006. [DOI: 10.1590/s1415-47572006000100029] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Silva RM, Oliveira FA, Cunha KMA, Maia JL, Maciel MAM, Pinto AC, Nascimento NRF, Santos FA, Rao VSN. Cardiovascular effects of trans-dehydrocrotonin, a diterpene from Croton cajucara in rats. Vascul Pharmacol 2005; 43:11-8. [PMID: 15975531 DOI: 10.1016/j.vph.2005.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2004] [Revised: 12/20/2004] [Accepted: 02/24/2005] [Indexed: 10/25/2022]
Abstract
Previous studies have established the gastroprotective, hypoglycemic, and hypolipidemic effects of trans-dehydrocrotonin (t-DCTN), a major diterpene isolated from the Amazon medicinal plant Croton cajucara. This study aims to examine the potential effects of t-DCTN on hemodynamic parameters that include resting arterial blood pressure and heart rate in vivo, and on left atrial force, spontaneous beating atria, and aortic rings of rats in vitro. Intravenous bolus injections of t-DCTN (5, 10, or 15 mg/kg) to urethane anesthetized normotensive rats reduced the mean arterial pressure and heart rate in a dose-dependent manner. The hypotensive effect of t-DCTN (10 mg/kg) appears not mediated through effects on the muscarinic cholinergic receptor, beta-adrenoceptor, or ganglionic blockade, for it was not affected by atropine, propranolol, or hexamethonium but was abolished by N(w)-nitro-L-arginine methyl ester (L-NAME), a nitric oxide synthase inhibitor. The diterpene t-DCTN showed no significant influence on inotropism. In isolated rat aortic rings with intact or denuded endothelium, t-DCTN relaxed the tonic contraction induced by phenylephrine (1 microM). Its vasorelaxant effect seen at smaller concentrations in endothelium intact preparations was, however, abolished in endothelium denuded or in l-NAME treated tissues. These data indicate the hypotensive and bradycardia effects of t-DCTN, possibly related in part to the release of nitric oxide and in part to direct effects on vascular smooth muscle, and cardiac pacemaker activity.
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Affiliation(s)
- Regilane M Silva
- Departamento de Fisiologia e Farmacologia, FM, Universidade Federal do Ceará-UFC, Rua Cel Nunes de Melo 1127, Porangabussu, Caixa Postal-3157, 60430-270 Fortaleza, Ceará, Brazil
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Wang X, Lan M, Wu HP, Shi YQ, Lu J, Ding J, Wu KC, Jin JP, Fan DM. Direct effect of croton oil on intestinal epithelial cells and colonic smooth muscle cells. World J Gastroenterol 2002; 8:103-7. [PMID: 11833082 PMCID: PMC4656597 DOI: 10.3748/wjg.v8.i1.103] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2001] [Revised: 10/15/2001] [Accepted: 10/23/2001] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the direct effect of croton oil (CO) on human intestinal epithelial cell (HIEC) and guinea pig colonic smooth muscle cells in vitro. METHODS Growth curves of HIEC were drawn by MTT colorimetry. The dynamics of cell proliferation was analyzed with flow cytometry, and morphological changes were observed under light and electron microscopy after long-term (6 weeks) treatment with CO. Expression of cyclooxygenase-2 (COX-2) mRNA was detected by dot blot in HIEC treated with CO. Genes related to CO were screened by DD-PCR, and the direct effect of CO on the contractility of isolated guinea pig colonic smooth muscle cells was observed. RESULTS High concentration (20-40 mg x L(-1)) CO inhibited cell growth significantly (1, 3, 5, 7d OD sequence: (20 mg x L(-1)) 0.040+/-0.003, 0.081+/-0.012, 0.147+/-0.022,0.024+/-0.016; (40 mg x L(-1)) 0.033+/-0.044, 0.056+/-0.012, 0.104+/-0.010, 0.189+/-0.006; OD control 0.031+/-0.008, 0.096+/-0.012, 0.173+/-0.009, 0.300+/-0.016, P<0.01), which appeared to be related directly to the dosage. Compared with the control, the fraction number of cells in G1 phase decreased from 0.60 to 0.58, while that in S phase increased from 0.30 to 0.34 and DNA index also increased after 6 weeks of treatment with CO (the dosage was increased gradually from 4 to 40 mg x L(-1)). Light microscopic observation revealed that cells had karyomegaly, less plasma and karyoplasm lopsidedness. Electron microscopy also showed an increase in cell proliferation and in the quantity of abnormal nuclei with pathologic mitosis. Expression of COX-2 mRNA decreased significantly in HIEC treated with CO. Thirteen differential cDNA fragments were cloned from HIEC treated with CO, one of which was 100 percent homologous with human mitochondrial cytochrome C oxidase subunit II. The length of isolated guinea pig colonic smooth muscle cells was significantly shortened after treatment with CO (P<0.05). CONCLUSION At a high CO concentration (>20 mg x L(-1)), cell growth and proliferation are inhibited in a dosage-dependent manner. Increase in cell proliferation and in malignant conversion of the cellular phenotype is observed in cells cultured chronically with CO. COX-2 mRNA expression decreases significantly, while human mitochondrial cytochrome C oxidase subunit IImRNA expression increases significantly in HIEC treated with CO. CO also has a direct effect on the contractility of Guinea pig colonic smooth muscle cells.
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Affiliation(s)
- Xin Wang
- Institute of Digestive Disease, Xijing Hospital, Fourth Military Medical University,Xi'an 710033, Shaanxi Province,China
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Silva RM, Santos FA, Rao VS, Maciel MA, Pinto AC. The lipid-lowering effect of trans-dehydrocrotonin, a clerodane diterpene from Croton cajucara Benth. in mice fed on high-fat diet. J Pharm Pharmacol 2001; 53:535-9. [PMID: 11341371 DOI: 10.1211/0022357011775640] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The clerodane diterpene trans-dehydrocrotonin extracted and isolated from the stem bark of Croton cajucara Benth. was investigated for its lipid-lowering effect in mice fed on a high-fat diet. Mice fed on a high-fat diet for a two-week period demonstrated significantly increased blood levels of total cholesterol and triglycerides, compared with normal controls. Oral treatment with trans-dehydrocrotonin at a dose of 25 or 50 mg kg(-1) daily markedly suppressed the high-fat-diet associated rise in total cholesterol and triglyceride levels. The hypocholesterolaemic effect of trans-dehydrocrotonin was more prominent at the dose of 50 mg kg(-1) with significant decreases in high-density lipoprotein, very-low-density lipoprotein and low-density lipoprotein cholesterol levels. The lower atherogenic index of the trans-dehydrocrotonin-treated groups suggests the hypolipidaemic potential of this plant-based drug. These results indicate that orally administered trans-dehydrocrotonin is effective in suppressing high-fat-diet-induced hyperlipidaemia in mice and suggest its likely beneficial use as anti-atherogenic agent.
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Affiliation(s)
- R M Silva
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Brazil
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Maciel MA, Pinto AC, Arruda AC, Pamplona SG, Vanderlinde FA, Lapa AJ, Echevarria A, Grynberg NF, Côlus IM, Farias RA, Luna Costa AM, Rao VS. Ethnopharmacology, phytochemistry and pharmacology: a successful combination in the study of Croton cajucara. JOURNAL OF ETHNOPHARMACOLOGY 2000; 70:41-55. [PMID: 10720788 DOI: 10.1016/s0378-8741(99)00159-2] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Phytochemical and pharmacological studies of Croton cajucara were oriented by traditional medicine. The stem bark of the mature plant is a rich source of clerodane-type diterpenes: trans-dehydrocrotonin (DCTN), trans-crotonin (CTN), cis-cajucarin B, cajucarin A, cajucarinolide and two novel clerodanes, trans-cajucarin B and sacacarin. In young (18-month-old) plants, the triterpene acetyl aleuritolic acid (AAA) was the major stem bark component and in these the diterpene DCTN was not present. The highest concentration of DCTN (1.4% of dry bark) was detected in 4-6 year-old plants, while 3-year-old plants contained only 0.26% of this diterpene. Three steroids (beta-sitosterol, stigmasterol and sitosterol-3-O-beta-glucoside), two flavonoids (kaempferol 3,4', 7-trimethyl ether and 3,7-dimethyl ether) and one diterpene (cajucarinolide) were isolated from the leaves of this Croton. The main pharmacological activity was correlated with DCTN. This clerodane produced anti-inflammatory and antinociceptive effects and a significant hypoglycemia in alloxan-induced diabetic rats. The compound also reduced the index of gastric lesions induced by restraint-in-cold. Dose-related DCTN and CTN inhibited in vivo the basal acid secretion in pylorus-ligature rats and oxyntic glands isolated from rabbit gastric mucosa, DCTN, CTN or AAA decreased in vitro uptake basal acid secretion induced by histamine and measured with the 14C-aminopyrine uptake method. Uniquely DCTN inhibited 14C-AP uptake induced by bethanechol. The terpenoids, DCTN and AAA, and the chloroform extract of 6-month-old plants reduced gastrointestinal transit in mice. The effects of DCTN and CTN on the survival of mice bearing Sarcoma 180 and Ehrlich carcinoma ascitic tumors, on the proliferation of cultured cells and TNFalpha were determined. DCTN was also evaluated for a possible antioestrogenic activity using the immature rat as a model system for bioassay of oestrogen and for an anti-implantation effect in regularly cycling rats. The biological experiments, using the plant extracts and the terpenoids DCTN, CTN and AAA, are herein discussed.
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MESH Headings
- Animals
- Anti-Ulcer Agents/isolation & purification
- Anti-Ulcer Agents/pharmacology
- Antineoplastic Agents, Phytogenic/isolation & purification
- Antineoplastic Agents, Phytogenic/pharmacology
- Brazil
- Estrogen Antagonists/isolation & purification
- Estrogen Antagonists/pharmacology
- Ethnobotany
- Female
- Gastric Acid/metabolism
- Gastrointestinal Agents/isolation & purification
- Gastrointestinal Agents/pharmacology
- Gastrointestinal Transit/drug effects
- In Vitro Techniques
- Male
- Medicine, Traditional
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Parietal Cells, Gastric/drug effects
- Plant Extracts/chemistry
- Plant Extracts/pharmacology
- Plants, Medicinal/chemistry
- Plants, Medicinal/growth & development
- Rabbits
- Rats
- Rats, Wistar
- Solvents
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Affiliation(s)
- M A Maciel
- Instituto de Química, Universidade Federal de Rio de Janeiro, Centro de Tecnologia, Bloco A-SALA 621-Cidade Universitária, Cep. 21945-970, Rio de Janeiro, Brazil.
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