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Moreno DAN, Saladini MS, Viroel FJM, Dini MMJ, Pickler TB, Amaral Filho J, dos Santos CA, Hanai-Yoshida VM, Grotto D, Gerenutti M, Hyslop S, Oshima-Franco Y. Are Silver Nanoparticles Useful for Treating Second-Degree Burns? An Experimental Study in Rats. Adv Pharm Bull 2021; 11:130-136. [PMID: 33747860 PMCID: PMC7961217 DOI: 10.34172/apb.2021.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 02/14/2020] [Accepted: 04/16/2020] [Indexed: 12/24/2022] Open
Abstract
Purpose: In this work, the potential usefulness of silver nanoparticles (AgNPs) for treating burn wounds was examined. Methods: Second-degree burns were induced in male Wistar rats by touching the skin with a heated (70°C) metallic device for 10 s, after which the animals were randomly allocated to one of two groups: control (n=8, treated with sterile saline) and experimental (n=8, treated with AgNPs, 0.081 mg/mL; 50 µL applied to the burn surface). Seven, 14, 21 and 28 days after lesion induction two rats from each group were killed and blood samples were collected for a complete blood count and to assess oxidative stress. The livers were examined macroscopically and skin samples were collected for histological analysis. Results: Macroscopically, wound healing and skin remodeling in the experimental group were similar to the saline-treated rats. Likewise, there were no significant differences in the histological parameters between the two groups. However, treatment with AgNPs caused a persistent reduction in white blood cell (WBC) counts throughout the experiment, whereas platelet counts increased on days 7 and 28 but decreased on days 14 and 21; there was also an increase in the blood concentration of reduced glutathione on day 7 followed by a decrease on days 21 and 28. There were no significant changes in blood glutathione peroxidase (GSH-Px) and catalase (CAT) activities or in the serum concentration of thiobarbituric acid reactive substances. Conclusion: The findings of this study raise questions about the potential transitory effects of AgNPs based on the changes in WBC and platelet counts, blood glutathione concentrations and macroscopic hepatic alterations.
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Affiliation(s)
| | - Mirela Santos Saladini
- Veterinary Medicine Graduate Course, University of Sorocaba (UNISO), Sorocaba, SP, Brazil
| | | | - Murilo Melo Juste Dini
- Graduate Program in Pharmaceutical Sciences, University of Sorocaba (UNISO), Sorocaba, SP, Brazil
| | - Thaisa Borim Pickler
- Laboratory for Toxicological Research (Lapetox), University of Sorocaba (UNISO), Sorocaba, SP, Brazil
| | - Jorge Amaral Filho
- Veterinary Medicine Graduate Course, University of Sorocaba (UNISO), Sorocaba, SP, Brazil
| | | | - Valquíria Miwa Hanai-Yoshida
- Graduate Program in Environmental and Technological Processes, University of Sorocaba (UNISO), Sorocaba, SP, Brazil
| | - Denise Grotto
- Graduate Program in Pharmaceutical Sciences, University of Sorocaba (UNISO), Sorocaba, SP, Brazil
- Graduate Program in Environmental and Technological Processes, University of Sorocaba (UNISO), Sorocaba, SP, Brazil
| | - Marli Gerenutti
- School of Medical Sciences of the Pontifical Catholic University of São Paulo (PUC-SP), Sorocaba, SP, Brazil
| | - Stephen Hyslop
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Yoko Oshima-Franco
- Graduate Program in Pharmaceutical Sciences, University of Sorocaba (UNISO), Sorocaba, SP, Brazil
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Oliveira ICF, de Paula MO, Lastra HCB, Alves BDB, Moreno DAN, Yoshida EH, Amaral Filho J, Cogo JC, Varanda EA, Rai M, Santos CAD, Oshima-Franco Y. Activity of silver nanoparticles on prokaryotic cells and Bothrops jararacussu snake venom. Drug Chem Toxicol 2018; 42:60-64. [PMID: 29961355 DOI: 10.1080/01480545.2018.1478850] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Nanoparticle-conjugated venom-toxins of venomous animals and its therapeutic efficacy against emerging or neglecting diseases is a promising strategy. In this study, silver nanoparticles (AgNPs ∼50 nm, 0.081 mg mL-1) were studied against the neuromuscular blockade, myotoxic effects induced by Bothrops jararacussu venom (60 µg mL-1) and also against prokaryotic cells. The neurotoxicity was evaluated on ex vivo mouse phrenic nerve-diaphragm using traditional myographic technique, able to obtain functional contractile responses and to check the neurotransmission. The myotoxicity on mammalian cells was evaluated in muscles resulting from pharmacological assays using routine histological techniques and light microscopy. The toxicity to prokaryotic cells was evaluated on Salmonella typhimurium TA100 without metabolic activation. The in vitro preincubation model between AgNPs and venom was enough to abolish toxic effects of B. jararacussu venom, but mammalian cells were highly sensitive to AgNPs more than prokaryotic cells, by acting as dose-independently and dose-dependently parameters, respectively. These results allowed us to conclude that AgNPs showed promising activity as antivenom agent but for its safer use, the toxicity should be evaluated on experimental animals.
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Affiliation(s)
| | | | | | - Bruno de Brito Alves
- c Post-Graduate Program in Pharmaceutical Sciences , University of Sorocaba (UNISO) , Sorocaba , Brazil
| | | | - Edson Hideaki Yoshida
- c Post-Graduate Program in Pharmaceutical Sciences , University of Sorocaba (UNISO) , Sorocaba , Brazil
| | - Jorge Amaral Filho
- c Post-Graduate Program in Pharmaceutical Sciences , University of Sorocaba (UNISO) , Sorocaba , Brazil
| | - José Carlos Cogo
- d Bioengineering and Biomedical Engineering Programs, Technological and Scientific Institute , Brazil University , Itaquera, São Paulo , Brazil
| | - Eliana Aparecida Varanda
- e Pharmaceutical Sciences Faculty of Araraquara , São Paulo State University (UNESP) , Araraquara , Brazil
| | - Mahendra Rai
- f Department of Biotechnology , SGB Amravati University , Amravati , India
| | - Carolina Alves Dos Santos
- c Post-Graduate Program in Pharmaceutical Sciences , University of Sorocaba (UNISO) , Sorocaba , Brazil
| | - Yoko Oshima-Franco
- c Post-Graduate Program in Pharmaceutical Sciences , University of Sorocaba (UNISO) , Sorocaba , Brazil
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Cristina Ferraz M, Aparecida Celestino Parrilha L, Silvia Duarte Moraes M, Amaral Filho J, Carlos Cogo J, Galdino dos Santos M, Madaleno Franco L, Carlos Groppo F, Puebla P, San Feliciano A, Oshima-Franco Y. The Effect of Lupane Triterpenoids (Dipteryx alata Vogel) in the in vitro Neuromuscular Blockade and Myotoxicity of two Snake Venoms. CURR ORG CHEM 2012. [DOI: 10.2174/138527212804004481] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Fantoni D, Otsuki DA, Martins AR, Filho JA, Andrades E, Chaib E, Voorwald FA. Comparative evaluation of therapeutic interventions during hemorrhagic shock. Crit Care 2011. [PMCID: PMC3061720 DOI: 10.1186/cc9510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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de Jesus Reis Rosa L, Silva GAA, Filho JA, Silva MG, Cogo JC, Groppo FC, Oshima-Franco Y. The inhibitory effect of Camellia sinensis extracts against the neuromuscular blockade of Crotalus durissus terrificus venom. J Venom Res 2010; 1:1-7. [PMID: 21544176 PMCID: PMC3086191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2010] [Revised: 08/22/2010] [Accepted: 08/25/2010] [Indexed: 12/02/2022]
Abstract
In geographically isolated populations where intensive medical care or serum therapy is not easily accessible snake envenomation is a major cause for concern. The aim of the present study was to test Camellia sinensis extracts, theaflavin and epigallocatechin (two of the main C. sinensis components) against the irreversible neuromuscular blockade induced by Crotalus durissus terrificus venom in mouse phrenic-nerve diaphragm preparations. A quantitative histological study was also performed. The venom (20µg/ml) completely decreased twitch tension after 70min and 5µg/ml venom abolished 50% of twitch amplitude after 60min. C. sinensis extract induced intense facilitatory effect in the preparation activity at 0.2mg/ml and slightly facilitatory effect at 0.05mg/ml. Both 0.05mg/ml C. sinensis extract and 0.05mg/ml commercial theaflavin maintained partial muscular activity in presence of 5µg/ml venom. The histological data confirms that Cs is able to protect the muscle from the myotoxic activity of the venom. Commercial epigallocatechin gallate did not show pre-synaptic nor post-synaptic activities. C. sinensis extract was able to protect the mouse phrenic-nerve diaphragm against the irreversible neuromuscular blockade induced by C. durissus terrificus venom.
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Affiliation(s)
- Luana de Jesus Reis Rosa
- Universidade de Sorocaba (UNISO), Rodovia Raposo Tavares km 92.5, Zip Code 18023-000, Sorocaba, SP, Brazil
| | - Gleidy Ana Araujo Silva
- Universidade de Sorocaba (UNISO), Rodovia Raposo Tavares km 92.5, Zip Code 18023-000, Sorocaba, SP, Brazil
| | - Jorge Amaral Filho
- Universidade de Sorocaba (UNISO), Rodovia Raposo Tavares km 92.5, Zip Code 18023-000, Sorocaba, SP, Brazil
| | - Magali Glauzer Silva
- Universidade de Sorocaba (UNISO), Rodovia Raposo Tavares km 92.5, Zip Code 18023-000, Sorocaba, SP, Brazil
| | - José Carlos Cogo
- Universidade Vale do Paraíba (UNIVAP), Av Shishima Hifumi, 2911, Zip Code 12.244-000, São José dos Campos, SP, Brazil
| | - Francisco Carlos Groppo
- Universidade Estadual de Campinas (UNICAMP), Av Limeira, 90, Zip Code 13.414-903 Piracicaba, SP, Brazil
| | - Yoko Oshima-Franco
- Universidade de Sorocaba (UNISO), Rodovia Raposo Tavares km 92.5, Zip Code 18023-000, Sorocaba, SP, Brazil,Correspondence to: Yoko Oshima-Franco, , Tel: +55 15 2101 7000, Fax: +55 15 2101 7112
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Santos LAP, Barros FR, Filho JA, da Silva EF. Precise dose evaluation using a commercial phototransistor as a radiation detector. Radiat Prot Dosimetry 2006; 120:60-3. [PMID: 16702243 DOI: 10.1093/rpd/nci608] [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] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
An experimental arrangement and a circuitry based on an NPN phototransistor-type silicon radiation detector have been used for evaluating the X-ray beam dose in the diagnostic range. The circuitry was built to allow alteration of the electric field in the phototransistor internal structure, with some devices that have an available base connection. By changing the transistor base bias it is possible to alter its operation point to obtain a response gain from the selected photon energy range. In this way we have made an electronic energy-domain discretisation and we are investigating a model to calculate the dose contribution from each energy discretised into 10 keV steps. The method has been tested in filtered radiation beams generated from an HF-160 Pantak X-ray unit and compared with the usual dosimetry method. Our results have demonstrated that it is possible to make such a dose deconvolution from 40 to 140 keV energies by controlling the phototransistor base bias properly.
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Affiliation(s)
- L A P Santos
- Centro Regional de Ciências Nucleares-CNEN, Av. Prof. Luiz Freire, 200, Cidade Universitaria, Recife-PE, CEP 50740-540, Brazil.
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Abstract
This study was conducted to observe the healing process of intentional lateral root perforation repaired with mineral trioxide aggregate (MTA). Forty-eight root canals of dogs' teeth were instrumented and filled. After partial removal of the filling, an intentional perforation was made with a bur in the lateral area of the root. The perforations were repaired with MTA or Sealapex (control group). Histological analysis occurred 30 and 180 days after treatment. Results showed no inflammation and deposition of cementum over MTA in the majority of the specimens. In the 180-day period, Sealapex exhibited chronic inflammation in all the specimens and slight deposition of cementum over the material in only three cases. In conclusion, MTA exhibited better results than the control group.
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Affiliation(s)
- R Holland
- Faculdade de Odontologia de Araçatuba, UNESP, São Paulo, Brazil
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Consolim-Colombo FM, Filho JA, Lopes HF, Sobrinho CR, Otto ME, Riccio GM, Mady C, Krieger EM. Decreased cardiopulmonary baroreflex sensitivity in Chagas' heart disease. Hypertension 2000; 36:1035-9. [PMID: 11116121 DOI: 10.1161/01.hyp.36.6.1035] [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] [Indexed: 11/16/2022]
Abstract
No study has been performed on reflexes originating from receptors in the heart that might be involved in the pathological lesions of Chagas' heart disease. Our study was undertaken to analyze the role of cardiopulmonary reflex on cardiovascular control in Chagas' disease. We studied 14 patients with Chagas' disease without heart failure and 12 healthy matched volunteers. Central venous pressure, arterial blood pressure, heart rate, forearm blood flow, and forearm vascular resistance were recorded during deactivation of cardiopulmonary receptors. By reducing central venous pressure by applying -10 and -15 mm Hg of negative pressure to the lower body, we observed (a) a similar decrease of central venous pressure in both groups; (b) a marked increase in forearm vascular resistance in the control group but a blunted increase in the Chagas' group; and (c) no significant changes in blood pressure and heart rate. To analyze cardiopulmonary and arterial receptors, we applied -40 mm Hg of lower-body negative pressure. As a consequence, (a) central venous pressure decreased similarly in both groups; (b) blood pressure was maintained in the control group, whereas in patients with Chagas' disease, a decrease in systolic and mean arterial pressure occurred; (c) heart rate increased in both groups; and (d) forearm vascular resistance increased significantly and similarly in both groups. Unloading of receptors with low levels of lower-body negative pressure did not increase forearm vascular resistance in patients with Chagas' disease, which suggests that the reflex mediated by cardiopulmonary receptors is impaired in patients with Chagas' disease without heart failure. Overall control of circulation appears to be compromised because patients did not maintain blood pressure under high levels of lower-body negative pressure.
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Affiliation(s)
- F M Consolim-Colombo
- Hypertension Unit, Heart Institute (InCor), University of São Paulo Medical School, Brazil.
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Cordeiro RS, Cunha FQ, Filho JA, Flores CA, Vasconcelos HN, Martins MA. Plasmodium berghei: physiopathological changes during infections in mice. Ann Trop Med Parasitol 1983; 77:455-65. [PMID: 6362586 DOI: 10.1080/00034983.1983.11811739] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Using infections of Plasmodium berghei in laboratory mice, the following physiopathological changes were observed during the seven days of the infection: reduction in haematocrit, increases in parasitized erythrocytes, pulmonary oedema, hypothermia, formation of prostaglandin-like substances in the central nervous system, increases and decreases in plasma bradykininogen levels and leucocytosis, as evidenced by neutrophilia, lymphocytosis and monocytosis. We found no changes in total plasma protein levels and albumin/globulin ratio.
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10
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Holland R, Nery MJ, de Mello W, de Souza V, Bernabé PF, Filho JA. Root canal treatment with calcium hydroxide. III. Effect of debris and pressure filling. Oral Surg Oral Med Oral Pathol 1979; 47:185-8. [PMID: 284283 DOI: 10.1016/0030-4220(79)90178-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Root canals of dog premolar teeth with or without debris were filled with calcium hydroxide with or without pressure. The histologic results, 90 days after treatment, showed better results in the specimens without debris. More favorable results were obtained with the pressure filling when debris was present in small amounts.
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Zeitune JM, Fonseca PC, Fabiani VL, Filho JA. Effects of intravenous glucose and aminoacids on gastric secretion. Acta Gastroenterol Latinoam 1977; 7:33-7. [PMID: 406757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Five healthy females were submited to parenteral nutrition with aminoacids and glucose solution and the acidity and volume of gastric juice were studied. We could find no difference in the obtained values at the various phases, even after the administration of betazole. From this we can conclude that the infusion of aminoacids and glucose does not alter the pattern of gastric secretion.
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Zeitune R, Soares EC, Muarrek J, Neto JM, Filho JA. Effects of intravenous glucose and aminoácids of gástric secretion. G E N 1975; 30:79-85. [PMID: 829084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Five healthy females were submitted to parenteral nutrition with amino acids and glucose solution and the acidity and volume of gastric juice were studied. No alterations were noted in the values obtained inthe various phases studied even after the administration of betazole. We concluded that the infusion of amino acids and glucose do not alter the pattern of gastric secretion.
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Pareja JC, Filho JA, Ferreira EA, Birolini D. [Metabolic response to trauma: potassium and water content in skeletal muscles]. Rev Hosp Clin Fac Med Sao Paulo 1975; 30:182-5. [PMID: 1239070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Coutinho EM, Mattos CE, Sant'Anna AR, Filho JA, Silva MC, Tatum HJ. Further studies on long-term contraception by subcutaneous silastic R capsules containing megestrol acetate. Contraception 1972; 5:389-93. [PMID: 4650656 DOI: 10.1016/0010-7824(72)90030-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Filho JA, Böhm GM, Sarti W. [Immunological and pathological aspects of immunopneumopathy produced in mice by pneumotoxic sera (author's transl)]. Rev Bras Pesqui Med Biol 1972; 5:57-63. [PMID: 4156085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Coutinho EM, Filho JA, Xavier R, Fuchs AR, Fuchs F. Effect of ethanol on the response of the non-pregnant human uterus to oxytocin and vasopressin. J Obstet Gynaecol Br Commonw 1970; 77:164-6. [PMID: 5419880 DOI: 10.1111/j.1471-0528.1970.tb03498.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Tatum HJ, Coutinho EM, Filho JA, Sant'anna AR. Acceptability of long-term contraceptive steroid administration in humans by subcutaneous Silastic capsules. Am J Obstet Gynecol 1969; 105:1139-43. [PMID: 5352595 DOI: 10.1016/0002-9378(69)90141-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Brock M, Filho JA, Schürmann K. [The subarachnoid hemorrhage without angiographic diagnosis. Peculiarities of the clinical course and thoughts on etiology]. Nervenarzt 1967; 38:319-22. [PMID: 6034889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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