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Silva-Júnior EF, Silva EPS, França PHB, Silva JPN, Barreto EO, Silva EB, Ferreira RS, Gatto CC, Moreira DRM, Siqueira-Neto JL, Mendonça-Júnior FJB, Lima MCA, Bortoluzzi JH, Scotti MT, Scotti L, Meneghetti MR, Aquino TM, Araújo-Júnior JX. Design, synthesis, molecular docking and biological evaluation of thiophen-2-iminothiazolidine derivatives for use against Trypanosoma cruzi. Bioorg Med Chem 2016; 24:4228-4240. [PMID: 27475533 DOI: 10.1016/j.bmc.2016.07.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 07/06/2016] [Accepted: 07/08/2016] [Indexed: 01/17/2023]
Abstract
In this study, we designed and synthesized a series of thiophen-2-iminothiazolidine derivatives from thiophen-2-thioureic with good anti-Trypanosoma cruzi activity. Several of the final compounds displayed remarkable trypanocidal activity. The ability of the new compounds to inhibit the activity of the enzyme cruzain, the major cysteine protease of T. cruzi, was also explored. The compounds 3b, 4b, 8b and 8c were the most active derivatives against amastigote form, with significant IC50 values between 9.7 and 6.03μM. The 8c derivative showed the highest potency against cruzain (IC50=2.4μM). Molecular docking study showed that this compound can interact with subsites S1 and S2 simultaneously, and the negative values for the theoretical energy binding (Eb=-7.39kcal·mol(-1)) indicates interaction (via dipole-dipole) between the hybridized sulfur sp(3) atom at the thiazolidine ring and Gly66. Finally, the results suggest that the thiophen-2-iminothiazolidines synthesized are important lead compounds for the continuing battle against Chagas disease.
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Affiliation(s)
- E F Silva-Júnior
- Medicinal Chemistry Laboratory, Pharmacy and Nursing School, Federal University of Alagoas, Maceio, Brazil
| | - E P S Silva
- Medicinal Chemistry Laboratory, Pharmacy and Nursing School, Federal University of Alagoas, Maceio, Brazil
| | - P H B França
- Medicinal Chemistry Laboratory, Pharmacy and Nursing School, Federal University of Alagoas, Maceio, Brazil
| | - J P N Silva
- Cell Biology Laboratory, Federal University of Alagoas, Maceio, Brazil
| | - E O Barreto
- Cell Biology Laboratory, Federal University of Alagoas, Maceio, Brazil
| | - E B Silva
- Biochemistry and Immunology Department, Biological Sciences Institute, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - R S Ferreira
- Biochemistry and Immunology Department, Biological Sciences Institute, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - C C Gatto
- Inorganic Synthesis and Crystallography Laboratory, Institute of Chemistry, University of Brasilia, Federal District, Brazil
| | - D R M Moreira
- Tissue Engineering and Immunopharmacology Laboratory, Oswaldo Cruz Foundation, Salvador, Bahia, Brazil
| | - J L Siqueira-Neto
- Skaggs School of Pharmacy and Pharmaceutical Sciences, California, San Diego La Jolla, United States
| | - F J B Mendonça-Júnior
- Laboratory of Drug Synthesis and Delivery, Biological Sciences Department, State University of Paraiba, Campus V, João Pessoa, Brazil
| | - M C A Lima
- Drug Design and Synthesis Laboratory, National Science and Technology Institute for Pharmaceutical Innovation, Federal University of Pernambuco, Recife, Brazil
| | - J H Bortoluzzi
- Catalysis and Chemical Reactivity Group (GCaR), Institute of Chemistry and Biotechnology, Federal University of Alagoas, Maceio, Brazil
| | - M T Scotti
- Laboratory of Drug Synthesis and Delivery, Biological Sciences Department, State University of Paraiba, Campus V, João Pessoa, Brazil
| | - L Scotti
- Laboratory of Drug Synthesis and Delivery, Biological Sciences Department, State University of Paraiba, Campus V, João Pessoa, Brazil
| | - M R Meneghetti
- Catalysis and Chemical Reactivity Group (GCaR), Institute of Chemistry and Biotechnology, Federal University of Alagoas, Maceio, Brazil
| | - T M Aquino
- Medicinal Chemistry Laboratory, Pharmacy and Nursing School, Federal University of Alagoas, Maceio, Brazil.
| | - J X Araújo-Júnior
- Medicinal Chemistry Laboratory, Pharmacy and Nursing School, Federal University of Alagoas, Maceio, Brazil
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Barreto EO, Riederer I, Arantes ACS, Carvalho VF, Farias-Filho FA, Cordeiro RSB, Martins MA, Savino W, e Silva PMR. Thymus involution in alloxan diabetes: analysis of mast cells. Mem Inst Oswaldo Cruz 2005; 100 Suppl 1:127-30. [PMID: 15962111 DOI: 10.1590/s0074-02762005000900022] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [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: 11/22/2022] Open
Abstract
We previously reported that alloxan-induced diabetes results in reduction in the number and reactivity of mast cells at different body sites. In this study, the influence of diabetes on thymic mast cells was investigated. Thymuses from diabetic rats showed marked alterations including shrinkage, thymocyte depletion, and increase in the extracellular matrix network, as compared to those profiles seen in normal animals. Nevertheless, we noted that the number and reactivity of mast cells remained unchanged. These findings indicate that although diabetes leads to critical alterations in the thymus, the local mast cell population is refractory to its effect. This suggests that thymic mast cells are under a different regulation as compared to those located in other tissues.
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Affiliation(s)
- E O Barreto
- Laboratório de Inflamação, Departamento de Fisiologia e Farmacodinâmica, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ 21040-900, Brasil.
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Serra MF, Barreto EO, Silva JP, Azevedo V, Mota EM, Pelajo-Machado M, Lucena S, Pires ALA, Carvalho V, Cordeiro RSB, Lenzi HL, Silva PMR, Martins MA. Kinetics of eosinophil and IgE-mast cell changes following infection with Angiostrongylus costaricensis in Wistar rats. Parasite Immunol 2003; 25:169-77. [PMID: 12911525 DOI: 10.1046/j.1365-3024.2003.00621.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/20/2022]
Abstract
Human abdominal angiostrongyliasis is a severe eosinophilic disease caused by Angiostrongylus costaricensis. Previous studies have demonstrated that wild rodents are critically involved as definitive hosts to this nematode in nature. In this study, we have evaluated the susceptibility of Wistar rats (Rattus norvegicus) to A. costaricensis infection. Kinetics of parasitological and pathological changes, including the number of adult worms recovered from mesenteric arteries, and of IgE, mast cell and eosinophil levels in several compartments have been assessed. The oral inoculation of third-stage larvae (L3) into adult Wistar rats led to a marked accumulation of worms in the branches of the mesenteric arteries 25 and 50 days post-inoculation. Intense bone marrow eosinophilia ranging from 7 to 50 days was accompanied by marked accumulation of eosinophils in the blood, peritoneal and bronchoalveolar spaces. Eosinophilic periarteritis, oedema and granuloma in the intestinal and lung tissues were also histologically evident. Total serum IgE and specific anti-parasite IgE peaked at 25 days post-infection, as measured by ELISA and by the passive cutaneous anaphylaxis test, respectively. At that time point, there was a drastic reduction in the number of intact mast cells in the peritoneal effluent. These findings indicate that Wistar rats are permissive to A. costaricensis infection. IgE-mast cell activation and massive tissue eosinophil infiltration are marked features in the process and are likely to play a crucial role in the immune-response evoked by this parasite.
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Affiliation(s)
- M F Serra
- Department of Physiology and Pharmacodynamics and Department of Pathology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro, Brazil
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Silva PM, Alves AC, Serra MF, Pires AL, Silva JP, Barreto EO, Cordeiro RS, Jose PJ, Teixeira MM, Lagente V, Martins MA. Modulation of eotaxin formation and eosinophil migration by selective inhibitors of phosphodiesterase type 4 isoenzyme. Br J Pharmacol 2001; 134:283-94. [PMID: 11564646 PMCID: PMC1572944 DOI: 10.1038/sj.bjp.0704233] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
1. This study was undertaken to investigate the possible contribution of the blockade of eotaxin generation to the anti-eosinophilotactic effect of phosphodiesterase (PDE) type 4 inhibitors. In some experiments, the putative synergistic interaction between PDE type 4 inhibitors and the beta2-agonist salbutamol was also assessed. 2. Sensitized guinea-pigs aerosolized with antigen (5% ovalbumin, OVA) responded with a significant increase in eotaxin and eosinophil levels in the bronchoalveolar lavage fluid (BALF) at 6 h. Eosinophil recruitment was inhibited by both PDE type 4 inhibitors rolipram (5 mg kg(-1), i.p.) and RP 73401 (5 mg kg(-1), i.p.) treatments. In contrast, only rolipram inhibited eotaxin production. 3. Sensitized rats intrapleurally challenged (i.pl.) with antigen (OVA, 12 microg cavity(-1)) showed a marked eosinophil infiltration at 24 h, preceded by eotaxin generation at 6 h. Intravenous administration of a rabbit anti-mouse eotaxin antibody (0.5 mg kg(-1)) significantly reduced allergen-evoked eosinophilia in this model. 4. Local pretreatment with rolipram (40 microg cavity(-1)) or RP 73401 (40 microg cavity(-1)) 1 h before challenge reduced eosinophil accumulation evaluated in the rat pleural effluent, but only the former was active against eotaxin generation. The inhibitors of PDE type 3 (SK&F 94836) and type 5 (zaprinast) failed to alter allergen-evoked eosinophil recruitment in rats. 5. Local injection of beta2-agonist salbutamol (20 microg cavity(-1)) inhibited both eosinophil accumulation and eotaxin production following pleurisy. The former was better inhibited when salbutamol and rolipram were administered in combination. 6. Treatment with rolipram and RP 73401 dose-dependently inhibited eosinophil adhesion and migration in vitro. These effects were clearly potentiated by salbutamol at concentrations that had no effect alone. 7. Our findings indicate that although rolipram and RP 73401 are equally effective in inhibiting allergen-induced eosinophil infiltration only the former prevents eotaxin formation, indicating that PDE 4 inhibitors impair eosinophil accumulation by mechanisms independent of eotaxin production blockade.
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Affiliation(s)
- P M Silva
- Departmento de Fisiologia e Farmacodinâmica, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil.
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Serra MF, Diaz BL, Barreto EO, Cordeiro RS, Nazaré Meirelles MN, Williams TJ, Martins MA, Silva PM. Mechanism underlying acute resident leukocyte disappearance induced by immunological and non-immunological stimuli in rats: evidence for a role for the coagulation system. Inflamm Res 2000; 49:708-13. [PMID: 11211922 DOI: 10.1007/s000110050650] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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] Open
Abstract
OBJECTIVE To investigate the involvement of the fibrinogen-fibrin system in the acute reduction of the resident leukocyte population following pleural inflammation. METHODS Sensitized and naive rats were injected intrapleurally (i.pl.) with antigen (ovalbumin) and platelet-activating factor (PAF) or bradykinin, respectively. Heparin (0.25 U/cavity), EDTA (80 microg/cavity) and hirudin (1 U/cavity) were injected locally 5 min before challenge, whereas fucoidin was injected intraperitoneally 30 min before stimulation. RESULTS Antigen challenge led to a rapid reduction in the number of resident leukocytes 30 min post-challenge (from 7.7 +/- 0.4 x 10(6) cells/cavity to 2.3 +/- 0.2 x 106 cells/cavity, n = 6, p < 0.001). The pleural stimulation of naive rats with either PAF or bradykinin also led to a significant decrease in the pleural leukocyte population, which occurred in parallel with the formation of a fibrin meshwork containing captured cells, as attested by electron microscopy. Heparin prevented the drop in the total leukocyte numbers, without modifying either plasma leakage or histamine release at 30 min or the subsequent neutrophil and eosinophil infiltration noted 4 and 24 h post-challenge, respectively. Similarly, hirudin and EDTA prevented the antigen-induced leukocyte disappearance reaction. Heparin also impaired the drop in the pleural leukocyte numbers evoked by PAF and bradykinin. CONCLUSION Our data show that the pleural resident cell disappearance phenomenon noted early after inflammatory provocation depends on the activation of the fibrinogen-fibrin system, and is not required for the subsequent leukocyte recruitment.
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Affiliation(s)
- M F Serra
- Depto de Fisiologia e Farmacodinamica, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brazil
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Diaz BL, Serra MF, Barreto EO, Cordeiro RS, Martins MA, e Silva PM. Antigen-induced pleural eosinophilia is suppressed in diabetic rats: role of corticosteroid hormones. Mem Inst Oswaldo Cruz 1998; 92 Suppl 2:219-22. [PMID: 9698938 DOI: 10.1590/s0074-02761997000800031] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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: 02/08/2023] Open
Abstract
Previous studies have evidenced for the existence of interactive regulatory mechanisms between insulin and steroid hormones in different systems. In this study, we have investigated whether endogenous corticosteroids could be implicated in the hyporeactivity to antigen challenge observed in sensitized diabetic rats. Alloxinated rats showed a long-lasting increase in the blood glucose levels and a reduction in the number of pleural mast cells at 48 and 72 hr, but not at 24 hr after alloxan administration. In parallel, they also showed a significant elevation in the plasma levels of corticosterone together with an increase in the adrenal/body weight ratio. Antigen-evoked eosinophil accumulation appeared significantly reduced in rats pretreated with dexamethasone as well as in those rendered diabetic 72 hr after alloxan. In the same way, naive animals treated with dexamethasone also responded with a significant decrease in the number of pleural mast cells. Interestingly, when sensitized diabetic rats were pretreated with the steroid antagonist RU 38486 a reversion of the reduction in the allergen-induced eosinophil accumulation was noted. We conclude that the down-regulation of the allergic inflammatory response in diabetic rats is close-related to reduction in mast cell numbers and over expression of endogenous corticosteroids.
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Affiliation(s)
- B L Diaz
- Departamento de Fisiologia e Farmacodinâmica, Instituto Oswaldo Cruz, Rio de Janeiro, Brasil
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Serra MF, Diaz BL, Barreto EO, Pereira AP, Lima MC, Barbosa-Filho JM, Cordeiro RS, Martins MA, de Silva PM. Anti-allergic properties of the natural PAF antagonist yangambin. Planta Med 1997; 63:207-212. [PMID: 9225600 DOI: 10.1055/s-2006-957654] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In this study we examined the ability of the furofuran lignan yangambin to influence the local and systemic responses induced by antigen or PAF in actively sensitized or normal rats. Given intraperitoneally 1 h before stimulation, yangambin inhibited the pleural neutrophil and eosinophil infiltration evoked by the i.pl. injection of PAF or antigen into normal or 14 daysensitized rats whereas plasma exudation evoked by both stimuli was unaffected. The pleural neutrophil influx (6 h) after LTB4 stimulation was also significantly inhibited by yangambin. We also evidenced that the hemoconcentration, thrombocytopenia, and leucocytosis noted after i.v. PAF were all attenuated by yangambin. In actively sensitized rats, pretreatment with yangambin failed to modify the antigen-induced hemoconcentration and leucocytosis, but dose-dependently abrogated the thrombocytopenia noted 1 h post-stimulation. In vitro, the anaphylactic contraction of longitudinal jejunal segments to antigen challenge was significantly inhibited by yangambin (10(-5)-10(-4) M). Likewise, the contraction of jejunal segments from normal rats to PAF was markedly blocked by yangambin under conditions where the response to 5-hydroxytryptamine (5-HT) was not altered. In conclusion, our results show that antigen- and PAF-induced pleural neutrophil and eosinophil accumulation, but not exudation, is sensitive to treatment with yangambin. In addition, yangambin also suppressed the pleural neutrophil infiltration triggered by LTB4 as well as the blood thrombocytopenia and intestinal anaphylaxis elicited by antigen in rats. Thus, our findings indicate that yangambin shows an antagonistic action on receptors other than those of PAF, i.e., LTB4, and strongly suggest that it may be a useful drug in the treatment of some allergic inflammatory responses.
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Affiliation(s)
- M F Serra
- Departamento de Fisiologia e Farmacodinämica, Instituto Oswaldo Cruz/FIOCRUZ, Rio de Janeiro, Brazil
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