1
|
Petrović A, Madić V, Stojanović G, Zlatanović I, Zlatković B, Vasiljević P, Đorđević L. Antidiabetic effects of polyherbal mixture made of Centaurium erythraea, Cichorium intybus and Potentilla erecta. JOURNAL OF ETHNOPHARMACOLOGY 2024; 319:117032. [PMID: 37582477 DOI: 10.1016/j.jep.2023.117032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/29/2023] [Accepted: 08/11/2023] [Indexed: 08/17/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The polyherbal mixture made of Centaurium erythraea aerial parts and Cichorium intybus roots and Potentilla erecta rhizomes has been used for centuries to treat both the primary and secondary complications of diabetes. AIM OF THE STUDY As a continuation of our search for the most effective herbal mixture used as an ethnopharmacological remedy for diabetes, this study aimed to compare the in vitro biological activities of this polyherbal mixture and its individual ingredients, and, most importantly, to validate the ethnopharmacological value of the herbal mixture through evaluation of its phytochemical composition, its potential in vivo toxicity and its effect on diabetes complications. MATERIALS AND METHODS Phytochemical analysis was performed using HPLC-UV. Antioxidant activity was estimated via the DPPH test. Potential cytotoxicity/anticytotoxicity was assessed using an in vitro RBCs antihemolytic assay and an in vivo sub-chronic oral toxicity method. Antidiabetic activity was evaluated using an in vitro α-amylase inhibition assay and in vivo using a chemically induced diabetic rat model. RESULTS The HPLC-UV analysis revealed the presence of p-hydroxybenzoic acid, p-hydroxybenzoic acid derivative, catechin, five catechin derivatives, epicatechin, isoquercetin, hyperoside, rutin, four quercetin derivatives, caffeic acid, and four caffeic acid derivatives in the polyherbal mixture decoction. Treatment with the decoction has shown no toxic effects. The antioxidant and cytoprotective activities of the polyherbal mixture were higher than the reference's ones. Its antidiabetic activity was high in both in vitro and in vivo studies. Fourteen days of treatment with the decoction (15 g/kg) completely normalized blood glucose levels of diabetic animals, while treatments with insulin and glimepiride only slightly lowered glycemic values. In addition, lipid status of treated animals as well as levels of serum AST, ALT, ALP, creatinine, urea and MDA were completely normalized. In addition, the polyherbal mixture completely restored the histopathological changes of the liver, kidneys and all four Cornu ammonis regions of the hippocampus. CONCLUSIONS The polyherbal mixture was effective in the prevention of both primary and secondary diabetic complications such as hyperlipidemia, increased lipid peroxidation, non-alcoholic fatty liver disease, nephropathy and neurodegeneration.
Collapse
Affiliation(s)
- Aleksandra Petrović
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia.
| | - Višnja Madić
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia
| | - Gordana Stojanović
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia
| | - Ivana Zlatanović
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia
| | - Bojan Zlatković
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia
| | - Perica Vasiljević
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia
| | - Ljubiša Đorđević
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia
| |
Collapse
|
2
|
Diab KA, Fahmy MA, Hassan EM, El-Toumy SA. Evaluation of the cytotoxic, anticancer, and genotoxic activities of Acacia nilotica flowers and their effects on N-methyl-N-nitrosourea-induced genotoxicity in mice. Mol Biol Rep 2022; 49:8439-8448. [PMID: 35934768 PMCID: PMC9463273 DOI: 10.1007/s11033-022-07662-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/27/2022] [Accepted: 05/30/2022] [Indexed: 12/03/2022]
Abstract
Purpose In this study, two main research objectives were examined: (1) the cytotoxic and anticancer activities of the aqueous methanol extract from Acacia nilotica flowers on three human cancer cells, namely lung A549, breast MCF-7, and leukemia THP-1 cells, and (2) the genotoxic effects of A. nilotica extract and its influence on DNA damage induced by N-methyl-N-nitrosourea (MNU) in mice. Methods Mice were orally treated with A. nilotica extract (200, 500, and 800 mg/kg for 4 days) with or without MNU (80 mg/kg intraperitoneally for 24 h). Results In vitro experiments showed that A549 cells were the most sensitive to A. nilotica extract among the tested cell lines. A. nilotica extract inhibited A549 cell proliferation by blocking the cell cycle at the G2/M phase and accumulating apoptotic cells in the sub-G0/G1 phase in A549 cells. In vivo experiments showed that MNU induced positive and negative genotoxicity in bone marrow cells and spermatocytes, respectively. Negative genotoxicity was observed in A. nilotica extract-treated groups only. However, A. nilotica extract (800 mg/kg) remarkably increased comet tail formation in bone marrow cells. Unexpectedly, the absence of antigenotoxicity was observed in three cotreated groups with A. nilotica extract and MNU compared with the MNU-treated group. Astonishingly, cotreatment with MNU and A. nilotica extract at a dose above 200 mg/kg remarkably increased micronucleus and comet tail formation in bone marrow cells compared with the MNU-treated group. Conclusions A. nilotica extract possessed anticancer activity with relative genotoxic effects at high doses. Supplementary Information The online version contains supplementary material available at 10.1007/s11033-022-07662-0.
Collapse
Affiliation(s)
- Kawthar A Diab
- Genetics and Cytology Department, National Research Centre (NRC), 33 El-Bohouth Street, Dokki, Cairo, Egypt.
| | - Maha A Fahmy
- Genetics and Cytology Department, National Research Centre (NRC), 33 El-Bohouth Street, Dokki, Cairo, Egypt
| | - Emad M Hassan
- Medicinal and Aromatic Plants Research Department, National Research Centre (NRC), 33 El-Bohouth Street, Dokki, Cairo, Egypt
| | - Sayed A El-Toumy
- Chemistry of Tannins Department, National Research Centre (NRC), 33 El-Bohouth Street, Dokki, Cairo, Egypt
| |
Collapse
|
3
|
Osteoprotective Effects of ‘Anti-Diabetic’ Polyherbal Mixture in Type 1 Diabetic Rats. ACTA VET-BEOGRAD 2021. [DOI: 10.2478/acve-2021-0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Abstract
Bone loss leading to osteopenia and osteoporosis is a frequent secondary complication of diabetes. This study aimed to evaluate the value of a traditionally used ‘anti-diabetic’ polyherbal mixture as a possible remedy for the prevention of this complication. Diabetes was induced in Wistar female rats with a single intraperitoneal injection of alloxan monohydrate. The animals with blood glucose higher than 20 mmol/L for 14 consecutive days were considered diabetic. For the next 14 days, animals were treated with two concentrations of the polyherbal mixture (10 and 20 g of dry plant material/ kg). Bone histopathology was evaluated using the H&E and Masson’s trichrome staining. Alloxan-induced diabetes triggered bone histological changes characteristic for the development of osteopenia and osteoporosis and treatment with the polyherbal decoction restored these histopathological changes of the bones to the healthy animal level. At the same time, treatment with these tested doses has shown no adverse effects. These findings suggest that this mixture might be used as a remedy for the prevention of diabetic bone loss.
Collapse
|
4
|
Madić V, Petrović A, Jušković M, Jugović D, Djordjević L, Stojanović G, Vasiljević P. Polyherbal mixture ameliorates hyperglycemia, hyperlipidemia and histopathological changes of pancreas, kidney and liver in a rat model of type 1 diabetes. JOURNAL OF ETHNOPHARMACOLOGY 2021; 265:113210. [PMID: 32795501 DOI: 10.1016/j.jep.2020.113210] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/07/2020] [Accepted: 07/20/2020] [Indexed: 05/15/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE One of the commonly prescribed 'anti-diabetic' polyherbal mixtures by European herbalists is made of Rubus fruticosus and Vaccinium myrtillus leaves, Potentilla erecta roots, Geum urbanum aerial parts and Phaseolus vulgaris pods. AIM OF THE STUDY This study aimed to evaluate the phytochemical composition, antioxidant capacity, potential toxicity, hypoglycemic, hypolipidemic, nephroprotective and hepatoprotective activities of this polyherbal mixture decoction. MATERIALS AND METHODS The phytochemical composition was evaluated using HPLC-UV. The antioxidant activity was assessed using the DPPH test. Potential toxicity was evaluated using the acute and sub-chronic oral toxicity method. Diabetes was induced in Wistar female rats with a single intraperitoneal injection of alloxan monohydrate (150 mg/kg). The animals whose blood glucose was >20 mmol/L for 14 consecutive days were considered diabetic. For the next 14 days, D-10 and D-20 groups were treated with the polyherbal mixture (10 and 20 g of dry plant material/kg, respectively). I and M were control groups treated with insulin glargine (13 IU/kg) and metformin (150 mg/kg), respectively. Healthy control (HC) and diabetic control (DC) groups were treated with water. The blood glucose level was measured on days 14, 21 and 28. Lipid profile analysis was done on day 28. Pancreas, kidney and liver histopathology was evaluated using the H&E and Masson's trichrome staining. The liver tissue was additionally tested for PAS-positive cells. RESULTS The HPLC-UV analysis revealed the presence of quinic, gallic and caftaric acid, arbutin, rutin, trifolin, astragalin, hyperoside, isoquercetin and quercitrin. The antioxidant activity of the extract was higher than the reference's one (p < 0.01). Treatment with the polyherbal mixture (10 and 20 g/kg) has shown no toxic effects. No major decline in blood sugar was recorded in I and M groups compared to the DC one (22.86 ± 2.58, 28.5 ± 0.42 and 27.82 ± 0.9 mmol/L, respectively). The polyherbal mixture lowered the blood glucose level to the normal value (8.64 ± 4.09, 5.26 ± 1.3 and 6.76 ± 1.54 mmol/L in D-10, D-20 and HC groups, respectively). Furthermore, it decreased the levels of total cholesterol, triglycerides, VLDL, LDL, atherogenic and cardiovascular risk indices (p < 0.001) compared to the DC group. In addition, the extract restored histopathological changes of the pancreas, kidneys and liver to the healthy animal level. CONCLUSION Treatment with the polyherbal mixture extract was more effective than the standard drugs (insulin and metformin) in the amelioration of hyperglycemia, hyperlipidemia, and histopathological changes of the pancreas, kidney and liver tissue.
Collapse
Affiliation(s)
- Višnja Madić
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia.
| | - Aleksandra Petrović
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia.
| | - Marina Jušković
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia.
| | - Dragana Jugović
- Laboratory for Cytogenetics and Immunology, Clinical Center of Niš, Bulevar Dr. Zorana Đinđića 48, 18000, Niš, Serbia.
| | - Ljubiša Djordjević
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia.
| | - Gordana Stojanović
- Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia.
| | - Perica Vasiljević
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000, Niš, Serbia.
| |
Collapse
|
5
|
Klaus A, Wan-Mohtar WAAQI, Nikolić B, Cvetković S, Vunduk J. Pink oyster mushroom Pleurotus flabellatus mycelium produced by an airlift bioreactor-the evidence of potent in vitro biological activities. World J Microbiol Biotechnol 2021; 37:17. [PMID: 33394203 DOI: 10.1007/s11274-020-02980-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 12/09/2020] [Indexed: 12/26/2022]
Abstract
Four types of mycelial extracts were derived from the airlift liquid fermentation (ALF) of Pleurotus flabellatus, namely exopolysaccharide (EX), endopolysaccharide (EN), hot water (WE), and hot alkali (AE) extracts. Such extracts were screened for their active components and biological potential. EN proved to be most effective in inhibition of lipid peroxidation (EC50 = 1.71 ± 0.02 mg/mL) and in Cupric ion reducing antioxidant capacity (CUPRAC) assay (EC50 = 2.91 ± 0.01 mg TE/g). AE exhibited most pronounced ability to chelate ferrous ions (EC50 = 4.96 ± 0.08 mg/mL) and to scavenge ABTS radicals (EC50 = 3.36 ± 0.03 mg TE/g). β-glucans and total phenols contributed most to the chelating ability and quenching of ABTS radicals. Inhibition of lipid peroxidation correlated best with total glucans, total proteins, and β-glucans. Total proteins contributed most to CUPRAC antioxidant capacity. Antifungal effect was determined against Candida albicans ATCC 10231 (MIC: 0.019-0.625 mg/mL; MFC: 0.039-2.5 mg/mL), and towards C. albicans clinical isolate (MIC and MFC: 10.0-20.0 mg/mL). Comparison of cytotoxicity against colorectal carcinoma HCT 116 cells (IC50: 1.8 ± 0.3-24.6 ± 4.2 mg/mL) and normal lung MRC-5 fibroblasts (IC50: 17.0 ± 4.2-42.1 ± 6.1 mg/mL) showed that EN, and especially AE possess selective anticancer activity (SI values 3.41 and 9.44, respectively). Slight genotoxicity was observed only for AE and EX, indicating the low risk concerning this feature. Notable antioxidative and anticandidal activities, selective cytotoxicity against colorectal carcinoma cells, and absence/low genotoxicity pointed out that ALF-cultivated P. flabellatus mycelium could be considered as a valuable source of bioactive substances.
Collapse
Affiliation(s)
- Anita Klaus
- Faculty of Agriculture, Institute for Food Technology and Biochemistry, University of Belgrade, 6 Nemanjina Street, 11080, Belgrade, Serbia.
| | - Wan Abd Al Qadr Imad Wan-Mohtar
- Functional Omics and Bioprocess Development Laboratory, Faculty of Science, Institute of Biological Sciences, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Biljana Nikolić
- Department of Microbiology, Faculty of Biology, University of Belgrade, 16 Studentski Trg, 11000, Belgrade, Serbia
| | - Stefana Cvetković
- Department of Microbiology, Faculty of Biology, University of Belgrade, 16 Studentski Trg, 11000, Belgrade, Serbia
| | - Jovana Vunduk
- Faculty of Agriculture, Institute for Food Technology and Biochemistry, University of Belgrade, 6 Nemanjina Street, 11080, Belgrade, Serbia
| |
Collapse
|
6
|
Cvetković S, Nastasijević B, Mitić-Ćulafić D, Đukanović S, Tenji D, Knežević-Vukčević J, Nikolić B. New insight into the antigenotoxic activity of Gentiana lutea extracts – Protective effect against food borne mutagens. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2020; 858-860:503251. [DOI: 10.1016/j.mrgentox.2020.503251] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 08/17/2020] [Accepted: 08/25/2020] [Indexed: 12/26/2022]
|
7
|
Rocha JD, da Silva Ferreira J, Vieira Silva JG, Silva Fernandes A, Hollanda Véras J, Madureira de Almeida L, Magalhães Teles A, Luiz Borges L, Chen-Chen L, Luiz Cardoso Bailão EF. In vitro hematotoxicity of Vernonanthura polyanthes leaf aqueous extract and its fractions. Drug Chem Toxicol 2020; 45:1026-1034. [PMID: 32757868 DOI: 10.1080/01480545.2020.1802481] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Vernonanthura polyanthes, popularly known as 'assa-peixe', is widely used in Brazil for therapeutic purpose mainly to treat respiratory tract problems. However, few studies investigated its chemical safety. In this way, we first obtained the V. polyanthes leaf aqueous extract (VpLAE) and three fractions (aqueous; n-butanol, n-BF; and ethyl acetate), and we chemically characterized this material. Then, the cytogenotoxic potential of the VpLAE and its fractions was investigated against human erythrocytes and lymphocytes using Trypan blue exclusion test of cell viability and CometChip. The phytochemical screening of V. polyanthes leaf revealed the presence of total phenolic compounds, flavonoids, tannins, coumarins, terpenic compounds, and cardioactive heterosides. n-BF presented the highest total phenolic, flavonoids, and tannins contents and, consequently, the highest antioxidant activity, according to the DPPH free radical scavenging method. Although the VpLAE and its fractions did not cause death of erythrocytes, the cells acquired an echinocytic form. Regarding lymphocytes, VpLAE and its fractions presented cytotoxicity and genotoxicity. When VpLAE or its fractions were co-treated with doxorubicin (DXR), a recognized cytotoxic drug, we observed an enhancement of DXR cytotoxicity against lymphocytes, but the DXR genotoxicity decreased around 15%. Since the VpLAE and its fractions increased the DXR cytotoxicity and decreased its genotoxicity, further studies should be conducted for the development of an adjuvant drug from this extract to reduce the side effects of chemotherapy. Moreover, the indiscriminate use of 'assa-peixe' by local people should be discouraged.
Collapse
Affiliation(s)
- Jamira Dias Rocha
- Laboratório de Biotecnologia, Universidade Estadual de Goiás, Câmpus Henrique Santillo, Anápolis, Brazil
| | - Janaina da Silva Ferreira
- Laboratório de Biotecnologia, Universidade Estadual de Goiás, Câmpus Henrique Santillo, Anápolis, Brazil
| | | | - Amanda Silva Fernandes
- Departmento de Genética, Laboratório de Radiobiologia e Mutagênese, Instituto de Ciências Biológicas I, Universidade Federal de Goiás, Goiânia, Brazil
| | - Jefferson Hollanda Véras
- Departmento de Genética, Laboratório de Radiobiologia e Mutagênese, Instituto de Ciências Biológicas I, Universidade Federal de Goiás, Goiânia, Brazil
| | | | - Aristônio Magalhães Teles
- Departamento de Botânica, Instituto de Ciências Biológicas I, Universidade Federal de Goiás, Goiânia, Brazil
| | - Leonardo Luiz Borges
- Laboratório de Biotecnologia, Universidade Estadual de Goiás, Câmpus Henrique Santillo, Anápolis, Brazil
| | - Lee Chen-Chen
- Departmento de Genética, Laboratório de Radiobiologia e Mutagênese, Instituto de Ciências Biológicas I, Universidade Federal de Goiás, Goiânia, Brazil
| | | |
Collapse
|
8
|
Paz MFCJ, de Alencar MVOB, de Lima RMP, Sobral ALP, do Nascimento GTM, dos Reis CA, Coêlho MDPSDS, do Nascimento MLLB, Gomes Júnior AL, Machado KDC, de Menezes AAPM, de Lima RMT, de Oliveira Filho JWG, Dias ACS, dos Reis AC, da Mata AMOF, Machado SA, Sousa CDDC, da Silva FCC, Islam MT, de Castro e Sousa JM, Melo Cavalcante AADC. Pharmacological Effects and Toxicogenetic Impacts of Omeprazole: Genomic Instability and Cancer. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:3457890. [PMID: 32308801 PMCID: PMC7146093 DOI: 10.1155/2020/3457890] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 10/19/2019] [Accepted: 11/21/2019] [Indexed: 12/15/2022]
Abstract
Omeprazole (OME) is commonly used to treat gastrointestinal disorders. However, long-term use of OME can increase the risk of gastric cancer. We aimed to characterize the pharmacological effects of OME and to correlate its adverse effects and toxicogenetic risks to the genomic instability mechanisms and cancer-based on database reports. Thus, a search (till Aug 2019) was made in the PubMed, Scopus, and ScienceDirect with relevant keywords. Based on the study objective, we included 80 clinical reports, forty-six in vitro, and 76 in vivo studies. While controversial, the findings suggest that long-term use of OME (5 to 40 mg/kg) can induce genomic instability. On the other hand, OME-mediated protective effects are well reported and related to proton pump blockade and anti-inflammatory activity through an increase in gastric flow, anti-inflammatory markers (COX-2 and interleukins) and antiapoptotic markers (caspases and BCL-2), glycoprotein expression, and neutrophil infiltration reduction. The reported adverse and toxic effects, especially in clinical studies, were atrophic gastritis, cobalamin deficiencies, homeostasis disorders, polyp development, hepatotoxicity, cytotoxicity, and genotoxicity. This study highlights that OME may induce genomic instability and increase the risk of certain types of cancer. Therefore, adequate precautions should be taken, especially in its long-term therapeutic strategies and self-medication practices.
Collapse
Affiliation(s)
- Márcia Fernanda Correia Jardim Paz
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, PI, Brazil
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
| | | | | | - André Luiz Pinho Sobral
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
- University Hospital, Teresina, PI, Brazil
| | | | | | | | | | - Antonio Luiz Gomes Júnior
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
- University Centre UNINOVAFAPI, Teresina, PI, Brazil
| | | | | | - Rosália Maria Torres de Lima
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
| | | | - Ana Carolina Soares Dias
- Laboratory of Genetics and Molecular Biology, Federal University of Maranhão, São Luís, MA, Brazil
| | - Antonielly Campinho dos Reis
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
| | | | | | | | - Felipe Cavalcanti Carneiro da Silva
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, PI, Brazil
- Department of Biological Sciences, Federal University of Piauí, Picos, PI, Brazil
| | - Muhammad Torequl Islam
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
| | | | - Ana Amélia de Carvalho Melo Cavalcante
- Postgraduate Program in Biotechnology (RENORBIO), Federal University of Piauí, Teresina, PI, Brazil
- Laboratory of Genetic Toxicity, Postgraduate Program in Pharmaceutical Sciences, Federal University of Piauí, Teresina, PI, Brazil
| |
Collapse
|
9
|
Antitumoral effects of [6]-gingerol [(S)-5-hydroxy-1-(4-hydroxy-3-methoxyphenyl)-3-decanone] in sarcoma 180 cells through cytogenetic mechanisms. Biomed Pharmacother 2020; 126:110004. [PMID: 32145583 DOI: 10.1016/j.biopha.2020.110004] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 02/01/2020] [Accepted: 02/06/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND [6]-Gingerol [(S)-5-hydroxy-1-(4-hydroxy-3-methoxyphenyl)-3-decanone] is a phenolic substance reported for several ethnopharmacological usage by virtue of its antioxidant, antiemetic, anti-inflammatory and anticancer properties. This study assessed the antitumoral effects of [6]-Gingerol in primary cells of Sarcoma 180 as well as in peripheral blood lymphocytes of mice. METHODS The effect of [6]-Gingerol was assessed by applying cytogenetic biomarkers as indicative of genotoxicity, mutagenicity and apoptosis. Ascitic liquid cells were treated with [6]-Gingerol at concentrations of 21.33, 42.66 and 85.33 μM and subjected to the cytotoxicity assays using Trypan blue test and the comet assay, as well as the cytokinesis-block micronucleus assay. Doxorubicin (6 μM) and hydrogen peroxide (85.33 μM) were used as positive controls. RESULTS [6]-Gingerol, especially at concentrations of 42.66 and 85.33 μM, showed notable cytotoxicity in Sarcoma 180 cells by reducing cell viability and cell division rates via induction of apoptosis. Genotoxicity at the concentrations used was punctuated by the increase in the index and frequency of DNA damage in tested groups. [6]-Gingerol, at all concentrations tested, did not induce significant aneugenic and/or clastogenic effects. It did, however, induced other nuclear abnormalities, such as nucleoplasmic bridges, nuclear buds and apoptosis. The genotoxic effects observed in the cotreatment with H2O2 (challenge assay) employing neoplastic and healthy cells, indicated that [6]-Gingerol may induce oxidative stress. CONCLUSIONS Observations suggest that [6]-Gingerol may be a candidate for pharmaceutical antitumoral formulations due to its cytotoxicity and to mechanisms associated with genetic instability generated by nuclear alterations especially by apoptosis.
Collapse
|
10
|
The mutagenic and antimutagenic activity of Sutherlandia frutescens extracts and marker compounds. Altern Ther Health Med 2018; 18:93. [PMID: 29544492 PMCID: PMC5856389 DOI: 10.1186/s12906-018-2159-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 03/07/2018] [Indexed: 12/31/2022]
Abstract
BACKGROUND Sutherlandia frutescens (L.) R. Br is endemic to Southern Africa where it has been traditionally used for cancer and diabetes. In recent times it has been marketed for its reputed (but not proven) anticancer, antidiabetic and anti-HIV properties. Little is known about the mutagenic and antimutagenic potential of extracts and common marker compounds of Sutherlandia frutescens. Therefore this study aimed to investigate the putative efficacy and possible long-term adverse effects of using this herb. METHODS Ethylacetate (EA) and 50% Methanol (MeOH) extracts were screened for mutagenic and antimutagenic activity using the Ames assay utilising TA97a, TA98, TA100 and TA102 in the presence and absence of metabolic activation. Four compounds, L-arginine, L-canavanine, GABA and D-pinitol known to occur in sutherlandia were also included. The total polyphenolic content of the both extracts was determined using the Folin-Ciocalteau method and FRAP and ABTS were used to determine the anti-oxidant potential of the extracts. RESULTS The extracts and the standards did not show any cytotoxicity except in TA97a. The EA extract exhibited antimutagenicity against all the bacterial strains at all concentrations tested. The MeOH extract showed both pro-mutagenic and antimutagenic activities with 2-acetamidofluorene and aflatoxin B1 in the presence of metabolic activation of TA98 and TA100, respectively. All compounds, except L-canavanine exhibited antimutagenic activity against all strains. L-canavanine, on the other hand showed co-mutagenicity with 9-aminoacridine on TA97a, at all test concentrations. The extracts and pure compounds exhibited their antimutagenic activity in a dose response manner. L-arginine and GABA showed an some antimutagenic response. EA extract had three times the total phenolic content (12.56 μg GE / mg) observed in the MeOH extract. There was correlation between total phenolic content, antioxidant potential and antimutagenicity. CONCLUSION Both extracts exhibited a protective effect, with the EA extract exhibiting greater potency. L-canavanine acted as a co-mutagen in a dose response manner without metabolic activation. It is suggested that the EA extract be priotized for future development work as it showed a better risk profile and activity.
Collapse
|
11
|
Acésio NO, Carrijo GS, Batista TH, Damasceno JL, Côrrea MB, Tozatti MG, Cunha WR, Tavares DC. Assessment of the antioxidant, cytotoxic, and genotoxic potential of the Annona muricata leaves and their influence on genomic stability. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 80:1290-1300. [PMID: 28956726 DOI: 10.1080/15287394.2017.1377653] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 09/06/2016] [Accepted: 09/07/2017] [Indexed: 06/07/2023]
Abstract
The popular use of Annona muricata L. is based upon a range of medicinal purposes, and the plant exhibits biological activities including antihyperglycemic, antiparasitic, and antitumor activities. The objectives of this study were to examine the antioxidant, cytotoxic, and genotoxic potential of the hydroalcoholic extract of A. muricata leaves (AMEs), as well as its effects on genotoxicity induced by methyl methanesulfonate (MMS) and hydrogen peroxide (H2O2). The results using 2,2-diphenyl-1-picrylhydrazyl assay showed that AME was able to scavenge 44.71% of free radicals. The extract significantly reduced the viability of V79 cells in the clonogenic assay at concentrations ≥8 µg/ml. No significant differences in micronucleus (MN) frequency were observed between V79 cell cultures treated with different concentrations of the extract (0.125, 0.25, 0.5, and 1 µg/ml) and negative control. When AME concentrations were combined with MMS, data revealed no marked differences from mutagen alone. In contrast, significant reductions in the frequencies of MN were noted in cultures treated with AME combined with H2O2 compared to H2O2 alone. In vivo studies found no significant differences in the frequencies of micronucleated polychromatic erythrocytes (MNPCEs) between animals treated with different AME doses compared to control. Animals treated with AME doses of 125 and 250 mg/kg and MMS exhibited significantly higher frequencies of MNPCE compared to mutagen alone. In conclusion, under current experimental conditions, AME was not genotoxic and exerted a modulatory effect on DNA damage depending upon the experimental conditions. The extract did not influence markedly MMS-induced genotoxicity in in vitro test system. However, the extract increased DNA damage induced by mutagen in mice. In V79 cells, AME reduced the genotoxicity produced by H2O2, and this protective effect was attributed in part to the antioxidant activity of AME.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Wilson Roberto Cunha
- a Postgraduate program in Sciences , Universidade de Franca , Franca SP , Brazil
| | | |
Collapse
|
12
|
Oyeyemi IT, Yekeen OM, Odusina PO, Ologun TM, Ogbaide OM, Olaleye OI, Bakare AA. Genotoxicity and antigenotoxicity study of aqueous and hydro-methanol extracts of Spondias mombin L., Nymphaea lotus L. and Luffa cylindrical L. using animal bioassays. Interdiscip Toxicol 2016; 8:184-92. [PMID: 27486380 PMCID: PMC4961917 DOI: 10.1515/intox-2015-0028] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 10/18/2015] [Accepted: 11/05/2015] [Indexed: 11/15/2022] Open
Abstract
Spondias mombin (Linn), Nymphaea lotus (Linn) and Luffa cylindrica (Linn) (syn Luffa aegyptiaca Mill) are plants traditionally used as food ingredients and in the management of diseases, including cancer, in Nigeria. Despite the therapeutic potentials attributed to these plants, reports on their genotoxicity are scanty. In this study, the genotoxicity of the aqueous and hydro-methanol extract of these plants was evaluated using mouse bone marrow micronucleus and sperm morphology assays. Antigenotoxicity was assessed by the bone marrow micronucleus test. The highest attainable dose of 5 000 mg/kg according to OECD guidelines was first used to assess acute toxicity of the aqueous and hydro-methanol extracts in Swiss albino mice. For each extract, there were five groups of mice (n=4/group) treated with different concentrations of the extract as against the negative and positive control group for the genotoxicity study. In the antigenotoxicity study, five groups of mice were exposed to five different concentrations of the extracts along with 60 mg/kg of methyl methane sulfonate (MMS), which was used to induce genotoxicity. The mice were administered 0.2 mL of extract per day for 10 days in the genotoxicity and antigenotoxicity groups. Administration of each of the extracts at the concentration of 5 000 mg/kg did not induce acute toxicity in mice. At the concentrations tested, all the extracts, except aqueous S. mombin, increased micronucleated polychromatic erythrocytes. The aqueous and hydro-methanol extracts of N. lotus increased the frequency of aberrant sperm cells. All the extracts were also able to ameliorate MMS induced genotoxicity in bone marrow cells of the exposed mice. The results showed the potential of the extracts to induce somatic and germ cell mutation in male mice. The extracts also ameliorated the genotoxic effect of MMS.
Collapse
Affiliation(s)
- Ifeoluwa Temitayo Oyeyemi
- Cell Biology and Genetics Unit, Department of Zoology, Faculty of Science, University of Ibadan, Ibadan, Nigeria
| | - Olaide Maruf Yekeen
- Cell Biology and Genetics Unit, Department of Zoology, Faculty of Science, University of Ibadan, Ibadan, Nigeria
| | - Paul Olayinka Odusina
- Cell Biology and Genetics Unit, Department of Zoology, Faculty of Science, University of Ibadan, Ibadan, Nigeria
| | - Taiwo Mary Ologun
- Cell Biology and Genetics Unit, Department of Zoology, Faculty of Science, University of Ibadan, Ibadan, Nigeria
| | - Orezimena Michelle Ogbaide
- Cell Biology and Genetics Unit, Department of Zoology, Faculty of Science, University of Ibadan, Ibadan, Nigeria
| | - Olayinka Israel Olaleye
- Cell Biology and Genetics Unit, Department of Zoology, Faculty of Science, University of Ibadan, Ibadan, Nigeria
| | - Adekunle A Bakare
- Cell Biology and Genetics Unit, Department of Zoology, Faculty of Science, University of Ibadan, Ibadan, Nigeria
| |
Collapse
|
13
|
Verschaeve L. Genotoxicity and Antigenotoxicity Studies of Traditional Medicinal Plants: How Informative and Accurate are the Results? Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000843] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Genotoxicity and antigenotoxicity studies of (traditional medicinal) plants are important from a risk assessment point of view and in the search for new medication against, for example, cancer. It is clear yet that attention should be paid to a number of aspects that may influence the outcome of a study and to which often no or insufficient attention is paid. A short overview is given of such aspects that deserve more attention.
Collapse
Affiliation(s)
- Luc Verschaeve
- Toxicology Unit, Scientific Institute of Public Health, Brussels, Belgium
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| |
Collapse
|
14
|
Antimutagenic compounds and their possible mechanisms of action. J Appl Genet 2014; 55:273-85. [PMID: 24615570 PMCID: PMC3990861 DOI: 10.1007/s13353-014-0198-9] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 01/20/2014] [Accepted: 01/31/2014] [Indexed: 12/23/2022]
Abstract
Mutagenicity refers to the induction of permanent changes in the DNA sequence of an organism, which may result in a heritable change in the characteristics of living systems. Antimutagenic agents are able to counteract the effects of mutagens. This group of agents includes both natural and synthetic compounds. Based on their mechanism of action among antimutagens, several classes of compounds may be distinguished. These are compounds with antioxidant activity; compounds that inhibit the activation of mutagens; blocking agents; as well as compounds characterized with several modes of action. It was reported previously that several antitumor compounds act through the antimutagenic mechanism. Hence, searching for antimutagenic compounds represents a rapidly expanding field of cancer research. It may be observed that, in recent years, many publications were focused on the screening of both natural and synthetic compounds for their beneficial muta/antimutagenicity profile. Thus, the present review attempts to give a brief outline on substances presenting antimutagenic potency and their possible mechanism of action. Additionally, in the present paper, a screening strategy for mutagenicity testing was presented and the characteristics of the most widely used antimutagenicity assays were described.
Collapse
|
15
|
Jacociunas LV, de Andrade HHR, Lehmann M, Pedersini LW, Ferraz ADBF, da Silva J, Dihl RR. Protective activity of Cynara scolymus L. leaf extract against chemically induced complex genomic alterations in CHO cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2013; 20:1131-1134. [PMID: 23830816 DOI: 10.1016/j.phymed.2013.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 04/25/2013] [Accepted: 06/01/2013] [Indexed: 06/02/2023]
Abstract
Cynara scolymus L., popularly known as artichoke, has been widely used in traditional medicine as an herbal medicament for therapeutic purposes. The study aimed at assessing the protective activity of Cynara scolymus leaf extract (LE) against DNA lesions induced by the alkylating agent ethylmethnesulphonate (EMS) in Chinese hamster ovary cells (CHO). The ability of C. scolymus L. LE to modulate the mutagenicity of EMS was examined using the cytokinesis block micronucleus (CBMN) cytome assay in three antigenotoxic protocols, pre- post- and simultaneous treatments. In the pre-treatment, C. scolymus L. LE reduced the frequencies of MNi and NBUDs induced by EMS in the lower concentration. In contrast, at the highest concentration (5 mg/ml) artichoke enhanced the frequency of MNi, potentiating EMS genotoxicity. In the simultaneous treatment only the induction of MNi was repressed by the exposure of cells to C. scolymus L. LE. No modification in genotoxicity was observed in LE post-treatment. The results obtained in this study suggest that lower concentrations of artichoke prevent chemically induced genomic damage in mammalian cells. In this context, the protective activity of C. scolymus L. could be associated to its constitutive antioxidants compounds.
Collapse
Affiliation(s)
- Laura Vicedo Jacociunas
- Programa de Pós-Graduação em Genética e Toxicologia Aplicada (PPGGTA) Universidade Luterana do Brasil (ULBRA), Canoas, RS, Brazil
| | | | | | | | | | | | | |
Collapse
|
16
|
Abdillahi HS, Verschaeve L, Finnie JF, Van Staden J. Mutagenicity, antimutagenicity and cytotoxicity evaluation of South African Podocarpus species. JOURNAL OF ETHNOPHARMACOLOGY 2012; 139:728-738. [PMID: 22155396 DOI: 10.1016/j.jep.2011.11.044] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 11/22/2011] [Accepted: 11/27/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Four species of Podocarpus are used in traditional medicine both in human and animal healthcare in South Africa. In vitro pharmacological screening of leaf and stem extracts of these species exhibited potent antimicrobial, anti-inflammatory, anti-tyrosinase, anthelmintic, acetylcholinesterase inhibitory and antioxidant activities. AIM OF THE STUDY To investigate the mutagenicity, antimutagenicity and cytotoxicity effects of leaf and stem extract of South African Podocarpus species. MATERIAL AND METHODS The mutagenicity and cytotoxic effects of extracts from four species of Podocarpus were tested using the Salmonella/microsome assay with and without metabolic activation, based on the plate-incorporation method and neutral red uptake (NRU) assay respectively. Five Salmonella typhimurium tester strains; TA98, TA100, TA102, TA1535 and TA1537 were used for mutagenicity testing. The relative cytotoxicity of the extracts was assessed by determining their NI(50) values (50% inhibition of NRU). RESULTS The extracts did not show any mutagenic effects against all the tester strains with or without metabolic activation. All extracts demonstrated a strong antimutagenic effect on the mutations induced by 4NQO, decreasing its mutagenic effect in a dose-dependent manner. Strong cytotoxic effects were exhibited by petroleum ether extracts as compared to 80% ethanol extracts. When HepG2 cells were in contact with plant extracts in an increasing concentration, slopes of NRU decreased (highest-lowest %) following a concentration-dependent pattern. For 80% ethanol extracts, the most toxic extract in terms of percentage viability was leaves of Podocarpus falcatus whereby at 0.2 mg/ml, the viability of the cells was 38.9%. Stem extract of Podocarpus latifolius was the most toxic among PE extracts, giving a percentage viability of 46.4 at 0.1 mg/ml. CONCLUSION Absence of mutagenicity does not indicate lack of toxicity, as was observed from these extracts. These findings will help in assessing the safety measures to be considered in the use of these species and also the need to determine the cytotoxic potential of these species against various forms of human cancer cells.
Collapse
Affiliation(s)
- Halima S Abdillahi
- Research Centre for Plant Growth and Development, School of Life Sciences, University of KwaZulu-Natal Pietermaritzburg, Scottsville, South Africa
| | | | | | | |
Collapse
|
17
|
Melo-Reis PR, Bezerra LSA, Vale MAAB, Canhête RFR, Chen-Chen L. Assessment of the mutagenic and antimutagenic activity of Synadenium umbellatum Pax latex by micronucleus test in mice. BRAZ J BIOL 2011; 71:169-74. [DOI: 10.1590/s1519-69842011000100024] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2009] [Accepted: 03/09/2010] [Indexed: 11/22/2022] Open
Abstract
Synadenium umbellatum Pax, popularly known as "cola-nota", is a medicinal plant that grows in tropical regions. The latex of this plant is used against various diseases, such as diabetes mellitus, leprosy, tripanosomiasis, leukemia, and several malignant tumors. The mutagenic, antimutagenic, and cytotoxic effects of the latex of this plant were investigated by measuring the frequency of micronuclei in mice bone marrow cells. To evaluate mutagenicity, the animals were treated with four doses of latex (10, 30, 50, and 100 mg/kg body weight). To study the antimutagenic activity, the animals were simultaneously treated with latex and mitomycin C (4 mg/kg). The cytotoxicity was evaluated by polychromatic and normochromatic erythrocytes ratio. Our results showed a significant increase of frequency of micronucleated polychromatic erythrocytes (MNPCE) compared to the negative control group (p < 0.05). Concerning antimutagenicity, the doses of 10 and 30 mg/kg co-administered with mitomycin C showed significant decrease in MNPCE frequency compared to the positive control group (p < 0.05). However, no significant reduction in MNPCE frequency (p > 0.05) was detected at the doses of 50 and 100 mg/kg. Under our experimental conditions, the results obtained indicate strong mutagenic and cytotoxic activity of S. umbellatum latex except the dose of 10 mg/kg and moderate antimutagenic effect at lower doses.
Collapse
|
18
|
Valdiglesias V, Méndez J, Pásaro E, Cemeli E, Anderson D, Laffon B. Assessment of okadaic acid effects on cytotoxicity, DNA damage and DNA repair in human cells. Mutat Res 2010; 689:74-79. [PMID: 20621797 DOI: 10.1016/j.mrfmmm.2010.05.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Revised: 05/07/2010] [Accepted: 05/20/2010] [Indexed: 05/29/2023]
Abstract
Okadaic acid (OA) is a phycotoxin produced by several types of dinoflagellates causing diarrheic shellfish poisoning (DSP) in humans. Symptoms induced by DSP toxins are mainly gastrointestinal, but the intoxication does not appear to be fatal. Despite this, this toxin presents a potential threat to human health even at concentrations too low to induce acute toxicity, since previous animal studies have shown that OA has very potent tumour promoting activity. However, its concrete action mechanism has not been described yet and the results reported with regard to OA cytotoxicity and genotoxicity are often contradictory. In the present study, the genotoxic and cytotoxic effects of OA on three different types of human cells (peripheral blood leukocytes, HepG2 hepatoma cells, and SHSY5Y neuroblastoma cells) were evaluated. Cells were treated with a range of OA concentrations in the presence and absence of S9 fraction, and MTT test and Comet assay were performed in order to evaluate cytotoxicity and genotoxicity, respectively. The possible effects of OA on DNA repair were also studied by means of the DNA repair competence assay, using bleomycin as DNA damage inductor. Treatment with OA in absence of S9 fraction induced not statistically significant decrease in cell viability and significant increase in DNA damage in all cell types at the highest concentrations investigated. However, only SHSY5Y cells showed OA induced genotoxic and cytotoxic effects in presence of S9 fraction. Furthermore, we found that OA can induce modulations in DNA repair processes when exposure was performed prior to BLM treatment, in co-exposure, or during the subsequent DNA repair process.
Collapse
Affiliation(s)
- Vanessa Valdiglesias
- Toxicology Unit, Psychobiology Department, University of A Coruña, Edificio de Servicios Centrales de Investigación, Campus Elviña s/n, 15071 A Coruña, Spain
| | | | | | | | | | | |
Collapse
|
19
|
Genotoxic effect of 6-gingerol on human hepatoma G2 cells. Chem Biol Interact 2010; 185:12-7. [DOI: 10.1016/j.cbi.2010.02.017] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 02/08/2010] [Accepted: 02/09/2010] [Indexed: 12/21/2022]
|
20
|
Kaleeswaran S, Sriram P, Prabhu D, Mathuram LN. Anti- and pro-mutagenic effects of silymarin in the Ames bacterial reverse mutation assay. Phytother Res 2009; 23:1378-84. [PMID: 19277970 DOI: 10.1002/ptr.2772] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
Silymarin, a polyphenolic flavonoid isolated from milk thistle (Silybum marianum), is being used clinically in Europe and Asia for the treatment of liver diseases. Silymarin has a strong antioxidative action capable of scavenging both free radicals and reactive oxygen species responsible for cancer. Silymarin, a powerful hepatoprotective and antioxidant, was chosen in the present study and was tested for its antimutagenic activity using an in vitro test, the Ames bacterial reverse mutation assay. The results indicated that silymarin showed a significant mutagenicity in frame shift mutant strains (TA97a and TA98) with metabolic activation. This compound also showed stronger antimutagenic effect against 2-aminofluorene and 4-nitroquinoline N-oxide induced mutation. When pre-, co- and post-treatment of silymarin was carried out, it showed stronger antimutagenic activity in the post-treatment with 2-aminofluorene and 4-nitroquinoline N-oxide in TA97a and TA98 strains.
Collapse
Affiliation(s)
- Sampath Kaleeswaran
- Department of Veterinary Pharmacology and Toxicology, Madras Veterinary College, Vepery, Chennai 600007, India
| | | | | | | |
Collapse
|
21
|
de Oliveira AM, dos Santos AG, dos Santos RA, Csipak AR, Olivato C, da Silva IC, de Freitas MB, Bassi CL, Cavalheiro AJ, Bolzani VS, Silva DHS, Sakamoto-Hojo ET, Takahashi CS, Soares CP. Ethanolic extract of Casearia sylvestris and its clerodane diterpen (caseargrewiin F) protect against DNA damage at low concentrations and cause DNA damage at high concentrations in mice's blood cells. Mutagenesis 2009; 24:501-6. [DOI: 10.1093/mutage/gep034] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
22
|
Hoffmann GR, Ronan MV, Sylvia KE, Tartaglione JP. Enhancement of the recombinagenic and mutagenic activities of bleomycin in yeast by intercalation of acridine compounds into DNA. Mutagenesis 2009; 24:317-29. [PMID: 19406902 DOI: 10.1093/mutage/gep012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Strain D7 of Saccharomyces cerevisiae was used to measure the induction by bleomycin (BLM) of mitotic recombination at the trp5 locus and point mutations at ilv1 in the presence and absence of acridine compounds. BLM is a potent mutagen and recombinagen in the D7 assay. The acridines vary, some being mutagenic or recombinagenic and others not. Combined treatments were used to distinguish whether a genetically inactive acridine has no effect on the genetic activity of BLM or modulates its action. When an acridine is itself genetically active, combined treatments were used to determine whether its effects are additive with those of BLM or whether there is interaction between the two compounds. Acridine compounds that share the ability to intercalate between the base pairs of DNA but differ in their mutagenic specificity owing to the presence of different substituent groups were analysed. Clear potentiation and synergistic interactions were detected in combined treatments with BLM and aminoacridines, nitroacridines or an acridine mustard. Potentiation and synergy were also observed in sequential exposures in which the yeast were grown in the presence of acridine compounds and then treated with BLM in the absence of free acridine. The results are consistent with an increase in BLM susceptibility conferred by acridine intercalation. It is likely that the intercalating agents increase the access of BLM to the minor groove of DNA, where it abstracts a hydrogen from the 4' position of deoxyribose, creating a free radical that is processed into strand breaks.
Collapse
Affiliation(s)
- George R Hoffmann
- Department of Biology, College of the Holy Cross, Worcester, MA 01610-2395, USA.
| | | | | | | |
Collapse
|
23
|
Abstract
The hormesis concept has broad implications for biology and the biomedical sciences. This perspective on hormesis concentrates on toxicology and toxicological risk assessment and secondarily explores observations from other fields. It considers the varied manifestations of hormesis in the context of a broad family of biological stress responses. Evidence for hormesis is reviewed, and the hormesis model is contrasted with more widely accepted dose-response models in toxicology: a linear nonthreshold (LNT) model for mutagenesis and carcinogenesis, and a threshold model for most other toxicologic effects. Scientific, philosophical, and political objections to the hormesis concept are explored, and complications in the hormesis concept are analyzed. The review concludes with a perspective on the current state of hormesis and challenges that the hormesis model poses for risk assessment.
Collapse
Affiliation(s)
- George R Hoffmann
- Department of Biology, College of the Holy Cross, One College Street, Worcester, MA 01610-2395, USA.
| |
Collapse
|
24
|
Verschaeve L, Van Staden J. Mutagenic and antimutagenic properties of extracts from South African traditional medicinal plants. JOURNAL OF ETHNOPHARMACOLOGY 2008; 119:575-587. [PMID: 18602977 DOI: 10.1016/j.jep.2008.06.007] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2008] [Revised: 06/02/2008] [Accepted: 06/09/2008] [Indexed: 05/26/2023]
Abstract
AIM OF THE STUDY The aim of this paper was to summarize the results of our investigations on the in vitro genotoxic as well as antigenotoxic effects of a great number of selected South African traditional medicinal plants. MATERIALS AND METHODS Investigations of methanol and dichloromethane extracts of selected plants were conducted with the bacterial Ames, Umu-C and VITOTOX tests, and with the cytochalasin B micronucleus test and alkaline comet assay in human white blood cells. RESULTS A number of extracts were found to have genotoxic properties. Amongst the genotoxic plant extracts, especially methanol extracts of Helichrysum simillimum DC. (Asteraceae) should be highlighted. On the other hand, some plant extracts also showed antimutagenic potential. Here Bauhinia galpinii N.E.Br. (Fabaceae) and especially Chlerodendrum myricoides (Hochst.) Vatke (=Rotheca myricoides (Hochst.) Steane & Mabb.; Lamiaceae) appear to have antimutagenic properties. CONCLUSION The safe use of Helichrysum similimum should be questioned and further investigations on its mutagenicity and overall biological properties should be encouraged. Antimutagenic properties of especially Bauhinia galpinii and Rotheca myricoides are considered of particular interest as it may be assumed that these antimutagenic natural substances are able to lower the cancer risk from everyday exposures to environmental mutagens as well as to mutagenic pharmaceuticals.
Collapse
Affiliation(s)
- L Verschaeve
- Scientific Institute of Public Health, Department of Epidemiology and Toxicology, J. Wytsmanstreet 14, B-1050 Brussels, Belgium.
| | | |
Collapse
|
25
|
Angeli JPF, Ribeiro LR, Angeli JLF, Mantovani MS. Protective effects of beta-glucan extracted from barley against benzo[a]pyrene-induced DNA damage in hepatic cell HepG2. ACTA ACUST UNITED AC 2008; 61:83-9. [PMID: 18583117 DOI: 10.1016/j.etp.2008.05.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2007] [Revised: 04/10/2008] [Accepted: 05/07/2008] [Indexed: 12/01/2022]
Abstract
The aim of the present study was to assess the genotoxic and antigenotoxic effect of beta-glucan (BG) extracted from barley. The genotoxicity of BG was tested in the single-cell gel electrophoresis assays (SCGE)/HepG2 test system. Moreover, the protective effects of BG against the genotoxicity of B[a]P were studied to delineate its mechanism of antigenotoxicity using four different treatment protocols - pre-treatment, simultaneous simple, simultaneous with pre-incubation, and post-treatment. The results showed that the compound itself was devoid of mutagenic activity at the three lower concentrations studied (1, 5, and 25microg/mL); however, genotoxic and cytotoxic effects were seen at 100 and 200microg/mL, respectively. In combination experiments with B[a]P, pronounced inhibition of DNA migration in the SCGE assay was observed in the two simultaneous treatments, and a smaller reduction was observed in the two other treatments. Thus, the data suggest that BG acts through binding to the genotoxic compound or capturing free radicals produced during its activation. However, the protective effects observed with pre-treatment and post-treatment suggest that the BG may be modulating cell metabolism.
Collapse
Affiliation(s)
- José Pedro F Angeli
- Departamento de Biologia Geral, Universidade Estadual de Londrina-UEL, PR, Brazil
| | | | | | | |
Collapse
|
26
|
Andrade LS, Santos DB, Castro DB, Guillo LA, Chen-Chen L. Absence of antimutagenicity of Cochlospermum regium (Mart. and Schr.) Pilger 1924 by micronucleus test in mice. BRAZ J BIOL 2008; 68:155-9. [DOI: 10.1590/s1519-69842008000100022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2006] [Accepted: 04/18/2006] [Indexed: 11/22/2022] Open
Abstract
Cochlospermum regium (Mart. and Schr.) Pilger, popularly known as "algodãozinho do campo", is a medicinal plant that grows in the Cerrado of Brazil. This plant has been used in traditional medicine against various diseases such as leucorrhoea, gastritis and ulcers. It has also been effective in treating skin problems like pimples, boils and blotches. In the present study, the in vivo antimutagenicity of aqueous extract of C. regium was evaluated. The Micronucleus Test was performed in polychromatic erythrocytes from Swiss male mice treated with one of the four doses of extract of the plant (19, 38, 76 and 114 mg.kg-1 body weight), administered by intraperitonial injection (i.p.) simultaneously with cyclophosphamide (24 mg.kg-1 b.w.) or mitomycin C (4 mg.kg-1 b.w.). The cytotoxicity was evaluated by polychromatic and normochromatic erythrocytes ratio (PCE/NCE). The results showed no significant reduction of the micronucleated polychromatic erythrocytes frequency (P > 0.05). In conclusion, the data indicate that C. regium roots aqueous extract, for the conditions used, did not exhibit the antimutagenic effect.
Collapse
Affiliation(s)
| | | | | | - LA Guillo
- Universidade Federal de Goiás, Brazil
| | | |
Collapse
|
27
|
Vilar JB, Ferreira FL, Ferri PH, Guillo LA, Chen Chen L. Assessment of the mutagenic, antimutagenic and cytotoxic activities of ethanolic extract of araticum (Annona crassiflora Mart. 1841) by micronucleus test in mice. BRAZ J BIOL 2008; 68:141-7. [DOI: 10.1590/s1519-69842008000100020] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2006] [Accepted: 05/16/2006] [Indexed: 01/01/2023] Open
Abstract
A typical Brazilian plant, araticum (Annona crassiflora Mart.), is widely used in humans as therapeutic medicine to treat several diseases such as diarrhea, rheumatism and syphilis. It contains acetogenins which present cytotoxic, antitumogenic, and antiparasitic properties. In this study, mutagenic, antimutagenic and cytotoxic effects of araticum leaves ethanolic extract were evaluated by micronucleus test in mice. To evaluate the mutagenic activity, animals were treated with ethanolic extract of araticum (EEA) using 10, 20, 50, 100 and 160 mg.kg-1. For all doses, micronucleated polychromatic erythrocytes (MNPCE) frequency was evaluated at 24, 48 and 72 hours after treatment. To evaluate the antimutagenic activity, animals were treated with 10, 20, 50 and 100 mg.kg-1 of EEA and 4 mg.kg-1 of MMC simultaneously. The frequency of MNPCE was evaluated 36 hours after exposure. Cytotoxicity was evaluated by the polychromatic and normochromatic erythrocytes ratio (PCE/NCE). In the mutagenicity assessment, all doses of EEA resulted in no significant increase of MNPCE (P > 0.05), compared to solvent- control group. Regarding administration time, no significant difference among three evaluation periods was observed (P > 0.05). Such results indicate that EEA did not exert mutagenic activity. Cytotoxicity was evident in doses of 50, 100 and 160 mg.kg-1 at 24 and 48 hours after exposure. Concerning antimutagenicity, except the 10 mg.kg-1 co-administered with 4 mg/kg of MMC, all doses reduced significantly the frequency of MNPCE compared to the positive control group (P < 0.05). These results, therefore, indicate an antimutagenic activity of the EEA. Cytotoxicity was significantly increased (P < 0.01) at 100 mg.kg-1 EEA doses co-administered with 4 mg.kg-1 of MMC.
Collapse
Affiliation(s)
- JB. Vilar
- Universidade Federal de Goiás, Brazil
| | | | | | | | | |
Collapse
|
28
|
Takeuchi PL, Antunes LMG, Takahashi CS. Evaluation of the clastogenicity and anticlastogenicity of vitamin B6 in human lymphocyte cultures. Toxicol In Vitro 2007; 21:665-70. [PMID: 17320343 DOI: 10.1016/j.tiv.2007.01.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2006] [Revised: 01/03/2007] [Accepted: 01/05/2007] [Indexed: 11/21/2022]
Abstract
Insufficient intakes of many micronutrients found in fruits and vegetables, such as folic acid, vitamins C and B6 may lead to DNA damage, cancer, and degenerative disease. The investigation of dietary antioxidants is a field of great interest for elucidating mechanisms of mutagenesis/carcinogenesis. The present study was undertaken to investigate the effects of vitamin B6 on the induction of chromosomal aberrations in cultured human lymphocytes and to examine the possible anticlastogenic effect of this vitamin on chromosomal damage induced by the antitumor drug doxorubicin. The results showed that when the cultures treated with vitamin B6 were compared with the untreated control in terms of total chromosomal damage and abnormal metaphases, pre- and simultaneous treatment with this vitamin showed no significant differences. In the post-treatment, average and above average concentrations of vitamin B6 alone showed a clastogenic effect. In the simultaneous protocol, this vitamin (15, 90 and 120 microg/mL) was effective in inhibiting chromosomal aberrations induced by doxorubicin (p<0.05), with a reduction of 33.1% with the highest concentration tested. However, in the post-treatment, the associations of vitamin B6 and doxorubicin exerted a more evident clastogenic effect than that observed in the cultures exposed only to the antitumor drug. In the present investigation, the inability of vitamin B6 to decrease chromosomal damage induced by doxorubicin in the pre- and post-treatments could be justified by the instability of this vitamin as a free radical scavenger. In conclusion, the results from this study confirmed that vitamin B6 is protective against chromosomal damage induced by doxorubicin in cultured human lymphocytes, but that the effects depend on concentration and form of treatment.
Collapse
Affiliation(s)
- Paula Lumy Takeuchi
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto (SP), Brazil.
| | | | | |
Collapse
|
29
|
Hoffmann GR, Gessner GS, Hughes JF, Ronan MV, Sylvia KE, Willett CJ. Modulation of the genotoxicity of bleomycin by amines through noncovalent DNA interactions and alteration of physiological conditions in yeast. Mutat Res 2007; 623:41-52. [PMID: 17428504 DOI: 10.1016/j.mrfmmm.2007.02.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2006] [Revised: 02/24/2007] [Accepted: 02/27/2007] [Indexed: 11/26/2022]
Abstract
The effects of amines on the induction of mitotic gene conversion by bleomycin (BLM) were studied at the trp5 locus in Saccharomyces cerevisiae strain D7. BLM induces double-strand breaks in DNA and is a potent recombinagen in this assay. The polyamine spermidine causes concentration-dependent protection against the genotoxicity of BLM, reducing the convertant frequency by over 90% under the most protective conditions. Spermine, diethylenetriamine, ethylenediamine, putrescine, and ethylamine were also antigenotoxic in combined treatments with BLM. There was a general correspondence between the protective effect and the number of amino groups, suggesting that more strongly cationic amines tend to be stronger antirecombinagens. Electrostatic association of the amines with DNA probably hinders BLM access to the 4' position of deoxyribose where it generates a free radical. Other amines interact with BLM differently from these unbranched aliphatic amines. The aminothiol cysteamine inhibits the genotoxicity of BLM under hypoxic conditions but increases it under euoxic conditions. In contrast, pargyline potentiates the genotoxicity of BLM under hypoxic conditions but not under euoxic conditions. The antirecombinagenic effect of cysteamine apparently involves DNA binding and depletion of oxygen needed for BLM activity, whereas its potentiation of BLM entails its serving as an electron source for the activation of BLM. Pargyline may enhance BLM indirectly by preventing the depletion of oxygen by monoamine and polyamine oxidase. The planar 9-aminoacridine weakly induces gene conversion in strain D7, but it is strongly synergistic with BLM. Enhancement of BLM activity by this compound and by the related nitroacridine Entozon is apparently mediated by intercalation of the acridine ring system into DNA. Thus, the influence of amines on the genotoxicity of BLM in yeast encompasses antigenotoxic, potentiating, and synergistic interactions. The underlying mechanisms involve noncovalent association with DNA, altered BLM access to DNA, and modulation of physiological conditions.
Collapse
Affiliation(s)
- George R Hoffmann
- Department of Biology, College of the Holy Cross, One College Street, Worcester, MA 01610-2395, USA.
| | | | | | | | | | | |
Collapse
|
30
|
Antunes LMG, de Barros E Lima Bueno R, da Luz Dias F, de Lourdes Pires Bianchi M. Acetylsalicylic acid exhibits anticlastogenic effects on cultured human lymphocytes exposed to doxorubicin. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2007; 626:155-61. [PMID: 17097912 DOI: 10.1016/j.mrgentox.2006.09.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2006] [Revised: 09/20/2006] [Accepted: 09/29/2006] [Indexed: 11/16/2022]
Abstract
Acetylsalicylic acid (ASA) is a non-steroidal anti-inflammatory drug (NSAID) with many pharmacological properties, such as anti-inflammatory, antipyretic and analgesic. Many studies have suggested the possible efficiency of ASA and other NSAIDs in preventing cancer. ASA could also have antimutagenic and antioxidant properties. The aim of this study was to investigate the possible clastogenic and anticlastogenic effects of different concentrations of ASA on doxorubicin-induced chromosomal aberrations in human lymphocytes. Human blood samples were obtained from six healthy, non-smoking volunteers; and the chromosomal aberration assay was carried out using conventional techniques. The parameters analyzed were mitotic index, total number of chromosomal aberrations and percentage of aberrant metaphases. The concentrations of ASA (25, 50 or 100 microg/mL) tested in combination with DXR (0.2 microg/mL) were established on the basis of the results of the mitotic index. The treatment with ASA alone was neither cytotoxic nor clastogenic (p>0.01). In lymphocyte cultures treated with different combinations of ASA and DXR, a significant decrease in the total number of chromosome aberrations was observed compared with DXR alone (p<0.01). This protective effect of ASA on DXR-induced chromosomal damage was obtained for all combinations, and it was most evident when ASA was at 25.0 microg/mL. In our experiments, ASA may have acted as an antioxidant and inhibited the chromosomal damage induced by the free radicals generated by DXR. The identification of compounds that could counteract the free radicals produced by doxorubicin could be of possible benefits against the potential harmful effects of anthracyclines. The results of this study show that there is a relevant need for more investigations in order to elucidate the mechanisms underlying the anticlastogenic effect of ASA.
Collapse
Affiliation(s)
- Lusânia Maria Greggi Antunes
- Depto de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil.
| | | | | | | |
Collapse
|
31
|
Reid KA, Maes J, Maes A, van Staden J, De Kimpe N, Mulholland DA, Verschaeve L. Evaluation of the mutagenic and antimutagenic effects of South African plants. JOURNAL OF ETHNOPHARMACOLOGY 2006; 106:44-50. [PMID: 16417980 DOI: 10.1016/j.jep.2005.11.030] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2005] [Revised: 11/21/2005] [Accepted: 11/23/2005] [Indexed: 05/06/2023]
Abstract
Dichloromethane and 90% methanol extracts of 42 South African plants were screened for mutagenicity and antimutagenicity using the Salmonella/microsome mutagenicity assay (Ames) against Salmonella typhimurium TA98 and TA100 bacterial strains in the presence and absence of metabolic activator S9. The methanol extracts from whole plants of Helichrysum simillimum, Helichrysum herbaceum and Helichrysum rugulosum indicated mutagenicity. These are the first reported tests on the mutagenicity of Helichrysum species. Six species indicated antimutagenic properties, all in the presence of S9: methanol leaf extract of Bauhinia galpinii, and dichloromethane leaf extracts of Bauhinia galpinii, Clerodendrum myricoides, Datura stramonium, Buddleja saligna, Millettia sutherlandii and Sutherlandia frutescens.
Collapse
Affiliation(s)
- K A Reid
- Expertise Centre of Environmental Toxicology, Flemish Institute for Technological Research (Vito), Boeretang 200, B-2400 Mol, Belgium
| | | | | | | | | | | | | |
Collapse
|
32
|
Bellini MF, Terezan AP, Ribeiro LR, Mantovani MS. In Vitro Metabolism Effect on Genotoxicity and Antigenotoxicity of Agaricus blazei Organics and Aqueous Extracts by the Comet Assay. CYTOLOGIA 2006. [DOI: 10.1508/cytologia.71.205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
33
|
Antunes LMG, Pascoal LM, Bianchi MDLP, Dias FL. Evaluation of the clastogenicity and anticlastogenicity of the carotenoid bixin in human lymphocyte cultures. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2005; 585:113-9. [PMID: 15949968 DOI: 10.1016/j.mrgentox.2005.04.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2005] [Revised: 04/18/2005] [Accepted: 04/22/2005] [Indexed: 11/30/2022]
Abstract
Carotenoids are regarded as effective antioxidants, antimutagenic and anticarcinogenic agents. Annatto, a red-yellow extract obtained from seeds of Bixa orellana L. is a mixture of several carotenoids and one of them bixin (BXN), is known as its major coloring compound. Studies on BXN clastogenicity and anticlastogenicity in cultured human lymphocytes have not been reported so far. Therefore, the present study was undertaken to investigate the ability of BXN to induce chromosomal aberrations in human lymphocytes in vitro and to examine the possible anticlastogenic effect of this carotenoid in chromosomal damage induced by the clastogen cisplatin (cDDP). Human blood samples were obtained from six healthy, non-smoking volunteers; two females and four males aged 18-35 years. The concentrations of BXN (1.0; 2.5; 5.0 or 10 microg/mL) tested in combination with cDDP were established on the basis of mitotic index (MI) measurements. The data showed that BXN was not cytotoxic or clastogenic, when compared to untreated control. A marked decrease in the MI values compared to the untreated control and an increased percentage of aberrant metaphases was seen in all cultures treated with cDDP. The carotenoid efficiency in reducing the inhibitory effect of cDDP on lymphocyte MI is concentration-dependent. Cultures simultaneously treated with BXN and cDDP showed a statistically significant reduction in total chromosomal aberrations and aberrant metaphases. In our experiments, BXN may have acted as an antioxidant by intercepting free radicals generated by cDDP. The data obtained in the present study suggest that dietary carotenoids may act as protective agents against clastogenic effects of antitumor agents. However, extensive studies are necessary to elucidate the mechanism of action of BXN before its therapeutic use.
Collapse
Affiliation(s)
- Lusânia M Greggi Antunes
- Departamento de Ciências Biológicas, Faculdade de Medicina do Triângulo Mineiro, Praça Manoel Terra, 330, Uberaba, MG 38015-050, Brazil.
| | | | | | | |
Collapse
|
34
|
Trosko JE, Upham BL. The emperor wears no clothes in the field of carcinogen risk assessment: ignored concepts in cancer risk assessment. Mutagenesis 2005; 20:81-92. [PMID: 15784692 DOI: 10.1093/mutage/gei017] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The following is a position paper challenging the paradigm that 'carcinogen = mutagen', and that the current rodent bioassay to predict risks to human cancers is relevant and useful. Specifically, we review current observations concerning carcinogenesis that might lead to another approach for assessing the identification of human carcinogenic hazards and the risk assessment that chemicals might pose. We give a brief review of the multistage and multimechanism process of cancer in a tissue that involves not only genotoxic but also epigenetic events, and the importance of stem and progenitor cells in the development of cancer. We focus on the often ignored 'epigenetic' effects of carcinogens and the role of cell communication systems in epigenetically altering gene expression that leads to an imbalance of cell proliferation, differentiation and apoptosis in a tissue that can contribute to the cancer process. To draw attention to the fact that the current paradigm and policy to test toxic chemicals is often misleading and incorrect, we discuss how oxidative stress, in spite of the DNA damaging data, most probably contributes to cancer at the epigenetic level. Additionally, we briefly review how this mutagenic concept has greatly diverted attention away from doing research on the lower molecular weight, non-genotoxic, polycyclic aromatic hydrocarbons (PAHs), and how these low molecular weight PAHs are etiologically more relevant to the disease potential of environmental mixtures such as cigarette smoke.
Collapse
Affiliation(s)
- James E Trosko
- National Food Safety Toxicology Center, Department of Pediatrics and Human Development, Michigan State University, East Lansing, MI 48824, USA.
| | | |
Collapse
|
35
|
Baird WM, Hooven LA, Mahadevan B. Carcinogenic polycyclic aromatic hydrocarbon-DNA adducts and mechanism of action. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2005; 45:106-14. [PMID: 15688365 DOI: 10.1002/em.20095] [Citation(s) in RCA: 436] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are a class of widespread environmental carcinogens. Most of our knowledge of their mechanisms of metabolic activation to DNA-binding "ultimate carcinogenic" metabolites has come from analysis of the DNA interaction products formed by these highly reactive intermediates. Studies of their role in forming DNA-binding intermediates identical to those formed in vivo from the PAH itself have also allowed identification of the particular cytochrome P450 enzymes involved in activating various structural classes of carcinogenic PAHs. It has been established that PAHs, after metabolic activation in vivo, are capable of inducing mutations in oncogenes and, by inducing multiple mutations, may result in tumors. PAHs also cause changes in cellular gap-junction communication similar to those caused by the tumor promoter 12-O-tetradecanoylphorbol-13-acetate. Thus, PAHs may also act through a promotional mechanism in addition to serving as tumor initiators. Previous studies on these mechanisms are described and summarized.
Collapse
Affiliation(s)
- William M Baird
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, USA.
| | | | | |
Collapse
|
36
|
Cavalcante AAM, Rübensam G, Erdtmann B, Brendel M, Henriques JA. Cashew (Anacardium occidentale) apple juice lowers mutagenicity of aflatoxin B1 in S. typhimurium TA102. Genet Mol Biol 2005. [DOI: 10.1590/s1415-47572005000200025] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | | | | | - João A.P. Henriques
- Universidade Federal do Rio Grande do Sul, Brazil; Universidade de Caxias do Sul, Brazil
| |
Collapse
|
37
|
Minozzo R, Deimling LI, Gigante LP, Santos-Mello R. Micronuclei in peripheral blood lymphocytes of workers exposed to lead. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2004; 565:53-60. [PMID: 15576239 DOI: 10.1016/j.mrgentox.2004.09.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2004] [Revised: 08/26/2004] [Accepted: 09/03/2004] [Indexed: 11/22/2022]
Abstract
Lead plays an important role in many industrial processes. Although highly useful to man, lead has various types of toxic effects. There is constantly growing evidence of a relationship between the induction of chromosome breaks and an increased risk of onset of cancer. However, available data about the possible genotoxic and carcinogenic action of lead are conflicting. In this report we present the results of studies on lead concentrations in blood and the respective micronucleus frequencies in peripheral blood lymphocytes from workers employed in the recycling of automotive batteries in the surroundings of Porto Alegre, Brazil. We observed that in the occupationally exposed group, both lead concentration in peripheral blood and micronucleus frequency in lymphocytes were significantly higher compared to control (Z=6.35, P<0.0001 and Z=4.47, P<0.0001). The nuclear division index (NDI) values were significantly higher in the control group than in the exposed group (Z=2.13, P=0.0330), indicating a possible effect of Pb on nuclear proliferation. We also detected a negative correlation between micronuclei and progression of nuclear division (tau=-0.312, P=0.0129). There were no changes in micronucleus frequency between smoking and non-smoking workers exposed to lead (Z=0.03, P=0.9790). The only difference found between the groups of smokers and non-smokers was with respect to NDI, whose values were significantly higher among non-smokers (Z=1.98, P=0.0481).
Collapse
Affiliation(s)
- Renato Minozzo
- Centro Universitário Feevale, Instituto de Ciências da Saúde, Novo Hamburgo, RS, Brazil
| | | | | | | |
Collapse
|
38
|
Visanji JM, Duthie SJ, Pirie L, Thompson DG, Padfield PJ. Dietary isothiocyanates inhibit Caco-2 cell proliferation and induce G2/M phase cell cycle arrest, DNA damage, and G2/M checkpoint activation. J Nutr 2004; 134:3121-6. [PMID: 15514285 DOI: 10.1093/jn/134.11.3121] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Benzyl isothiocyanate and phenethyl isothiocyanate, two aromatic phytochemicals present in substantial concentrations in edible vegetables of the genus Brassica, were investigated for their effects on Caco-2 cell proliferation. Benzyl and phenethyl isothiocyanate inhibited DNA synthesis, with 50% inhibitory concentrations of 5.1 and 2.4 micromol/L, respectively, and significantly increased the doubling times of Caco-2 cells from 32 h to 220 and 120 h, respectively. There was no adverse effect of either chemical on cell viability in the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, but benzyl isothiocyanate and phenethyl isothiocyanate both caused an accumulation of cells in the G(2)/M phase of the cell cycle, which was maintained for at least 48 h in cells synchronized at prometaphase with nocodazole and subsequently treated with 10 micromol/L benzyl isothiocyanate or phenethyl isothiocyanate. Both benzyl and phenethyl isothiocyanate increased DNA strand breakage, increased phosphorylation of the G(2)/M checkpoint enforcer Chk2, and induced p21 expression. These results suggest that the antiproliferative effects of benzyl and phenethyl isothiocyanates toward Caco-2 cells are due at least in part to the activation of the G(2)/M DNA damage checkpoint, and that sustained G(2)/M phase cell cycle arrest in response to benzyl and phenethyl isothiocyanates may be maintained through upregulation of p21. This study indicates that some dietary isothiocyanates may exert an antiproliferative effect through activation of the G(2)/M DNA damage checkpoint.
Collapse
Affiliation(s)
- James M Visanji
- Section of Gastrointestinal Science, University of Manchester, Manchester, UK
| | | | | | | | | |
Collapse
|