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Mangueira VM, de Sousa TKG, Batista TM, de Abrantes RA, Moura APG, Ferreira RC, de Almeida RN, Braga RM, Leite FC, Medeiros KCDP, Cavalcanti MAT, Moura RO, Silvestre GFG, Batista LM, Sobral MV. A 9-aminoacridine derivative induces growth inhibition of Ehrlich ascites carcinoma cells and antinociceptive effect in mice. Front Pharmacol 2022; 13:963736. [PMID: 36324671 PMCID: PMC9618857 DOI: 10.3389/fphar.2022.963736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 09/29/2022] [Indexed: 11/16/2022] Open
Abstract
Acridine derivatives have been found with anticancer and antinociceptive activities. Herein, we aimed to evaluate the toxicological, antitumor, and antinociceptive actions of N’-(6-chloro-2-methoxyacridin-9-yl)-2-cyanoacetohydrazide (ACS-AZ), a 9-aminoacridine derivative with antimalarial activity. The toxicity was assessed by acute toxicity and micronucleus tests in mice. The in vivo antitumor effect of ACS-AZ (12.5, 25, or 50 mg/kg, intraperitoneally, i.p.) was determined using the Ehrlich tumor model, and toxicity. The antinociceptive efficacy of the compound (50 mg/kg, i.p.) was investigated using formalin and hot plate assays in mice. The role of the opioid system was also investigated. In the acute toxicity test, the LD50 (lethal dose 50%) value was 500 mg/kg (i.p.), and no detectable genotoxic effect was observed. After a 7-day treatment, ACS-AZ significantly (p < 0.05) reduced tumor cell viability and peritumoral microvessels density, suggesting antiangiogenic action. In addition, ACS-AZ reduced (p < 0.05) IL-1β and CCL-2 levels, which may be related to the antiangiogenic effect, while increasing (p < 0.05) TNF-α and IL-4 levels, which are related to its direct cytotoxicity. ACS-AZ also decreased (p < 0.05) oxidative stress and nitric oxide (NO) levels, both of which are crucial mediators in cancer known for their angiogenic action. Moreover, weak toxicological effects were recorded after a 7-day treatment (biochemical, hematological, and histological parameters). Concerning antinociceptive activity, ACS-AZ was effective on hotplate and formalin (early and late phases) tests (p < 0.05), characteristic of analgesic agents with central action. Through pretreatment with the non-selective (naloxone) and μ1-selective (naloxonazine) opioid antagonists, we observed that the antinociceptive effect of ACS-AZ is mediated mainly by μ1-opioid receptors (p < 0.05). In conclusion, ACS-AZ has low toxicity and antitumoral activity related to cytotoxic and antiangiogenic actions that involve the modulation of reactive oxygen species, NO, and cytokine levels, in addition to antinociceptive properties involving the opioid system.
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Affiliation(s)
- Vivianne M. Mangueira
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Tatyanna K. G. de Sousa
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Tatianne M. Batista
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Renata A. de Abrantes
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Ana Paula G. Moura
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Rafael C. Ferreira
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Reinaldo N. de Almeida
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Renan M. Braga
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Fagner Carvalho Leite
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | | | - Misael Azevedo T. Cavalcanti
- Drug Development and Synthesis Laboratory, Department of Pharmacy, State University of Paraíba, João Pessoa, Brazil
| | - Ricardo O. Moura
- Drug Development and Synthesis Laboratory, Department of Pharmacy, State University of Paraíba, João Pessoa, Brazil
| | - Geovana F. G. Silvestre
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Leônia M. Batista
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
- Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa, Brazil
| | - Marianna V. Sobral
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
- Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa, Brazil
- *Correspondence: Marianna V. Sobral,
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de Abrantes RA, Batista TM, Mangueira VM, de Sousa TKG, Ferreira RC, Moura APG, Abreu LS, Alves AF, Velozo ES, Batista LM, da Silva MS, Tavares JF, Sobral MV. Antitumor and antiangiogenic effects of Tonantzitlolone B, an uncommon diterpene from Stillingia loranthacea. Naunyn Schmiedebergs Arch Pharmacol 2022; 395:267-274. [PMID: 34854946 DOI: 10.1007/s00210-021-02185-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 11/14/2021] [Indexed: 01/04/2023]
Abstract
Natural products have played a pivotal role for the discovery of anticancer drugs. Tonantzitlolones are flexibilan-type diterpenes rare in nature; therefore, few reports have shown antiviral and cytotoxic activities. This study aimed to investigate the in vivo antitumor action of Tonantzitlolone B (TNZ-B) and its toxicity. Toxicity was evaluated in mice (acute and micronucleus assays). Antitumor activity of TNZ-B (1.5 or 3 mg/kg intraperitoneally - i.p.) was assessed in Ehrlich ascites carcinoma model. Angiogenesis and reactive oxygen species (ROS) and nitric oxide (NO) production were also investigated, in addition to toxicological effects after 7-day treatment. The LD50 (lethal dose 50%) was estimated at around 25 mg/kg (i.p.), and no genotoxicity was recorded. TNZ-B reduced the Ehrlich tumor's volume and total viable cancer cell count (p < 0.001 for both). Additionally, TNZ-B reduced peritumoral microvessel density (p < 0.01), suggesting antiangiogenic action. Moreover, a decrease was observed on ROS (p < 0.05) and nitric oxide (p < 0.001) levels. No significant clinical findings were observed in the analysis of biochemical, hematological, and histological (liver and kidney) parameters. In conclusion, TNZ-B exerts antitumor and antiangiogenic effects by reducing ROS and NO levels and has weak in vivo dose-repeated toxicity. These data contribute to elucidate the antitumor action of TNZ-B and point the way for further studies with this natural compound as an anticancer drug.
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Affiliation(s)
- Renata A de Abrantes
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Tatianne M Batista
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Vivianne M Mangueira
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Tatyanna K G de Sousa
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Rafael C Ferreira
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Ana Paula G Moura
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Lucas S Abreu
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
| | - Adriano F Alves
- Department of Physiology and Pathology, Federal University of Paraíba, João Pessoa, PB, Brazil
| | - Eudes S Velozo
- Research Laboratory in Materia Medica, School of Pharmacy, Federal University of Bahia, Salvador, Brazil
| | - Leônia M Batista
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
- Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa, Brazil
| | - Marcelo S da Silva
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
- Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa, Brazil
| | - Josean F Tavares
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil
- Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa, Brazil
| | - Marianna V Sobral
- Post Graduation Program in Bioactive Natural and Synthetic Products, Federal University of Paraíba, João Pessoa, Brazil.
- Department of Pharmaceutical Sciences, Federal University of Paraíba, João Pessoa, Brazil.
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Jesus NZT, Falcão HS, Lima GRM, Caldas Filho MRD, Sales IRP, Gomes IF, Santos SG, Tavares JF, Barbosa-Filho JM, Batista LM. Hyptis suaveolens (L.) Poit (Lamiaceae), a medicinal plant protects the stomach against several gastric ulcer models. J Ethnopharmacol 2013; 150:982-8. [PMID: 24184082 DOI: 10.1016/j.jep.2013.10.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 09/14/2013] [Accepted: 10/03/2013] [Indexed: 05/27/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Hyptis suaveolens is used by the traditional population in several parts of the world to treat inflammation, gastric ulcer and infection and is used as a crude drug to relieve symptoms related with gastric ulcer or gastritis in northeaster and central region of Brazil. MATERIALS AND METHODS the standardized ethanolic extract (Hs-EtOHE) and hexanic fraction (Hs-HexF) of Hyptis suaveolens (62,5, 125, 250 and 500 mg/kg) was evaluated in several models of acute gastric ulcers. The participation of NO was evaluated by pretreatment with L-NAME and non-protein sulfyhydryls by NEM in the gastroprotective effect. RESULTS Hs-EtOHE and Hs-HexF markedly reduced the gastric lesions induced by all ulcerogenic agents (HCl/ethanol, ethanol, NSAIDs and hypothermic restraint-stress). Gastric ulcerations were exacerbated by administration of NEM suggesting that the gastroprotective mechanism of action of Hs-EtOHE and Hs-HexF involves sulfhydryl groups. CONCLUSION Ours results show that an extract of Hyptis suaveolens, administered orally to rodents, present gastro protective activity in different models of acute of gastric ulcer and give some support to the reported claims on the use of this plant as a gastro protective agent.
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Affiliation(s)
- N Z T Jesus
- Department of Pharmaceutical Sciences, Federal University of Paraiba (UFPB), 58051-970 João Pessoa, PB, Brazil
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de Almeida CLF, Falcão HDS, Lima GRDM, Montenegro CDA, Lira NS, de Athayde-Filho PF, Rodrigues LC, de Souza MDFV, Barbosa-Filho JM, Batista LM. Bioactivities from marine algae of the genus Gracilaria. Int J Mol Sci 2011; 12:4550-73. [PMID: 21845096 PMCID: PMC3155369 DOI: 10.3390/ijms12074550] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 06/26/2011] [Accepted: 07/05/2011] [Indexed: 11/16/2022] Open
Abstract
Seaweeds are an important source of bioactive metabolites for the pharmaceutical industry in drug development. Many of these compounds are used to treat diseases like cancer, acquired immune-deficiency syndrome (AIDS), inflammation, pain, arthritis, as well as viral, bacterial, and fungal infections. This paper offers a survey of the literature for Gracilaria algae extracts with biological activity, and identifies avenues for future research. Nineteen species of this genus that were tested for antibacterial, antiviral, antifungal, antihypertensive, cytotoxic, spermicidal, embriotoxic, and anti-inflammatory activities are cited from the 121 references consulted.
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Affiliation(s)
- Cynthia Layse F. de Almeida
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
| | - Heloina de S. Falcão
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
| | - Gedson R. de M. Lima
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
| | - Camila de A. Montenegro
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
| | - Narlize S. Lira
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
| | - Petrônio F. de Athayde-Filho
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
| | - Luis C. Rodrigues
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
| | - Maria de Fátima V. de Souza
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
| | - José M. Barbosa-Filho
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
| | - Leônia M. Batista
- Department of Pharmaceutical Sciences, Laboratory of Pharmaceutical Technology, Federal University of Paraiba, João Pessoa, PB 58051-900, Brazil; E-Mails: (C.L.F.A.); (H.S.F.); (G.R.M.L.); (C.A.M.); (N.S.L.); (P.F.A.-F); (L.C.R.); (M.F.V.S.); (J.M.B.-F.)
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Mariath IR, Falcão HDS, Barbosa-Filho JM, Sousa LCFD, Tomaz ACDA, Batista LM, Diniz MDFFM, Athayde-Filho PF, Tavares JF, Silva MS, Cunha EVLD. Plants of the American continent with antimalarial activity. Rev bras farmacogn 2009. [DOI: 10.1590/s0102-695x2009000100026] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
Peptic ulcer is a chronic and appalling disease. Today, it is dominant among the diseases that affect the world's population. The principal factors causing this disease are inadequate dietetic habits, prolonged use of non-steroidal anti-inflammatory drugs, stress and infection by Helicobacter pylori, in addition to other factors of genetic origin. The present work is a literature survey of plant extracts from the American continent that have been reported to show antiulcer activity. This review refers to 58 plants with their families, parts used, type of extract used, model bioassays and their activity. This work intends to aid the researchers in the study of natural products appropriate to the treatment of stomach and intestinal diseases, in general, and peptic ulcer in particular.
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Affiliation(s)
- H S Falcão
- Laboratório de Tecnologia Farmacêutica, Universidade Federal da Paraíba, Cx. Postal 5009, 58051-970 João Pessoa, PB, Brazil
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Barbosa-Filho JM, Nascimento Júnior FAD, Tomaz ACDA, Athayde-Filho PFD, Silva MSD, Cunha EVLD, Souza MDFVD, Batista LM, Diniz MFM. Natural products with antileprotic activity. Rev bras farmacogn 2007. [DOI: 10.1590/s0102-695x2007000100022] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Barbosa Filho JM, Medeiros KCP, Diniz MDFF, Batista LM, Athayde-Filho PF, Silva MS, Cunha EVD, Almeida JRS, Quintans-Júnior LJ. Natural products inhibitors of the enzyme acetylcholinesterase. Rev bras farmacogn 2006. [DOI: 10.1590/s0102-695x2006000200021] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Barbosa-Filho JM, Vasconcelos TH, Alencar AA, Batista LM, Oliveira RA, Guedes DN, Falcão HDS, Moura MD, Diniz MF, Modesto-Filho J. Plants and their active constituents from South, Central, and North America with hypoglycemic activity. Rev bras farmacogn 2005. [DOI: 10.1590/s0102-695x2005000400021] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Falcão HDS, Lima IO, Santos VLD, Dantas HDF, Diniz MDF, Barbosa-Filho JM, Batista LM. Review of the plants with anti-inflammatory activity studied in Brazil. Rev bras farmacogn 2005. [DOI: 10.1590/s0102-695x2005000400020] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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dos Santos AL, Abreu CM, Batista LM, Alviano CS, de Araújo Soares RM. Cell-associated and extracellular proteinases in Blastocrithidia culicis: influence of growth conditions. Curr Microbiol 2001; 43:100-6. [PMID: 11391472 DOI: 10.1007/s002840010269] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2000] [Accepted: 01/10/2001] [Indexed: 11/24/2022]
Abstract
The proteinase profile of Blastocrithidia culicis was analyzed, as well as how different growth conditions influenced its expression by gelatin-SDS-PAGE and the use of specific proteinase inhibitors. Multiple cell-associated proteinases with molecular masses corresponding to 33, 55, 60 kDa (cysteine proteinases) and 77, 80, 90, and 108 kDa (metalloproteinases) were detected using these methods. All the metalloproteinases identified were partitioned into the detergent phase after Triton X-114 extract, suggesting that they are membrane-bound, while all cysteine proteinases were partitioned into the aqueous phase. The proteolytic zymograms were similar when three different media were used for variable times of incubation. However, few quantitative and qualitative changes were observed. The secreted proteinase profile showed an heterogeneous pattern of enzymatic activities whose expression was dependent on time of growth and medium composition. However, the extracellular proteinase activities were abolished by 1,10-phenanthroline, suggesting that all of them are zinc-metalloproteinases.
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Affiliation(s)
- A L dos Santos
- Departamento de Microbiologia Geral, Instituto de Microbiologia Professor Paulo de Góes, Centro de Ciências da Saúde, Bloco I, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil
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dos Santos AL, Batista LM, Abreu CM, Alviano CS, Angluster J, de Araújo Soares RM. Developmentally regulated protein expression mediated by dimethylsulfoxide in Herpetomonas samuelpessoai. Curr Microbiol 2001; 42:111-6. [PMID: 11136132 DOI: 10.1007/s002840010188] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
We have analyzed the total cell extract, cell surface, and secretory protein profiles related to cellular differentiation triggered by dimethylsulfoxide in the insect trypanosomatid Herpetomonas samuelpessoai. The flagellates were cultivated in chemically defined conditions in the absence or in the presence of 4% DMSO, and the resolved protein bands were detected by SDS-PAGE gels and avidin-Western blotting. The cell-associated proteins showed a complex pattern of around 40 silver-staining bands ranging from 15 to 150 kDa. There were generally minor quantitative differences in the protein profile between the non-treated and the DMSO-treated cells. The cell-surface protein profile revealed by the incubation of live parasites with biotin showed a decrease in the expression of the 120 kDa biotinylated polypeptide observed in the DMSO-treated cells when compared with untreated ones. However, control samples of both systems showed an endogenous biotinylated polypeptide of 63 kDa which also presented gelatinolytic activity. The trypanosomatids released at least 10 polypeptides to the culture medium. A low molecular mass exopolypeptide (35 kDa) was found exclusively in untreated cells, whereas a high-molecular-mass exopolypetide (250 kDa) was preferentially found in DMSO-treated cells.
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Affiliation(s)
- A L dos Santos
- Departamento de Microbiologia Geral, Instituto de Microbiologia Professor Paulo de Góes (IMPPG), CCS, Bloco I, Universidade Federal do Rio de Janeiro (UFRJ), Ilha do Fundão, 21941-590, Rio de Janeiro, RJ, Brazil
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