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Sales DA, Marques TMF, Ghosh A, Gusmão SBS, Vasconcelos TL, Luz-Lima C, Ferreira OP, Hollanda LM, Lima IS, Silva-Filho EC, Dittz D, Lobo AO, Viana BC. Synthesis of silver-cerium titanate nanotubes and their surface properties and antibacterial applications. Mater Sci Eng C Mater Biol Appl 2020; 115:111051. [PMID: 32600685 DOI: 10.1016/j.msec.2020.111051] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 12/11/2019] [Revised: 04/23/2020] [Accepted: 05/02/2020] [Indexed: 11/18/2022]
Abstract
Nano-heterostructures of titanate nanotubes were synthesized and they revealed a complex structure with the formation of TiO2 (anatase), CeO2, Ag2O and metallic silver nanoparticles on the outer walls and intercalation of Ce4+ and Ag+ into the interlayer spaces of the nanotubes by microwave-assisted hydrothermal process and subjected to ion exchange reactions. To the best of our knowledge, this is the first reported silver and cerium co-exchanged titanate nanotubes for bio-applications. The co-ion exchange processes preserved the original tubular structure of titanate nanotubes with significant changes of the superficial as well as interlamellar environment. This study opens up possibility of synthesizing complex, functional nano-heterostructure with the scope of modification of the final structure, especially the amount and oxidation state of the intercalated cation (Ce4+, Ce3+ and Ag+) as well as the quantity and variety of the decorating nanoparticles (CeO2, Ag2O or metallic Ag). The interplay of which, in turn, can lead to important biological properties and applications, owing to their ion-liberation capacity. The samples were tested in antibacterial activity with two different kind of bacteria (gram positive and negative), cell cytotoxicity and adhesion, and it was found that the nano-heterostructure formed shows high antibacterial activity with low cytotoxicity and high cell adhesion, which makes it a promising material for further health applications.
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Affiliation(s)
- Débora A Sales
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Thalles M F Marques
- Instituto Federal de Educação, Ciência e Tecnologia do Piauí - IFPI, 64760-000, Campus São João do Piauí, PI, Brazil
| | - Anupama Ghosh
- LaMFA - Laboratório de Materiais Funcionais Avançados, Departamento de Física, Universidade Federal do Ceará - UFC, 60440-554 Fortaleza, Ceará, Brazil; Central Analítica, Universidade Federal do Ceará - UFC, 60440-554 Fortaleza, Ceará, Brazil
| | - Suziete B S Gusmão
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Thiago L Vasconcelos
- Divisão de Metrologia de Materiais, Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Duque de Caxias, Rio de Janeiro 25250-020, Brazil
| | - Cleanio Luz-Lima
- Departamento de Física, Universidade Federal do Piauí - UFPI, 64049-550, Teresina, Piauí, Brazil
| | - Odair P Ferreira
- LaMFA - Laboratório de Materiais Funcionais Avançados, Departamento de Física, Universidade Federal do Ceará - UFC, 60440-554 Fortaleza, Ceará, Brazil
| | - Luciana M Hollanda
- Programa de Pós-Graduação em Biotecnologia Industrial, Universidade Tiradentes - UNIT, 49032-490 Aracaju, Sergipe, Brazil
| | - Idglan S Lima
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Edson C Silva-Filho
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Dalton Dittz
- Departamento de Bioquímica e Farmacologia, Universidade Federal do Piauí - UFPI, 64049-550 Teresina, Piauí, Brazil
| | - Anderson O Lobo
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil
| | - Bartolomeu C Viana
- Laboratório interdisciplinar de materiais avançados (LIMAV), Programa de Pós-Graduação em Ciência e Engenharia dos Materiais, Universidade Federal do Piauí - UFPI, Teresina, PI, Brazil; Departamento de Física, Universidade Federal do Piauí - UFPI, 64049-550, Teresina, Piauí, Brazil.
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Huancahuire-Vega S, Hollanda LM, Gomes-Heleno M, Newball-Noriega EE, Marangoni S. ACP-TX-I and ACP-TX-II, Two Novel Phospholipases A 2 Isolated from Trans-Pecos Copperhead Agkistrodon contortrix pictigaster Venom: Biochemical and Functional Characterization. Toxins (Basel) 2019; 11:toxins11110661. [PMID: 31739403 PMCID: PMC6891687 DOI: 10.3390/toxins11110661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 09/26/2019] [Revised: 10/30/2019] [Accepted: 11/06/2019] [Indexed: 01/18/2023] Open
Abstract
This work reports the purification and biochemical and functional characterization of ACP-TX-I and ACP-TX-II, two phospholipases A2 (PLA2) from Agkistrodon contortrix pictigaster venom. Both PLA2s were highly purified by a single chromatographic step on a C18 reverse phase HPLC column. Various peptide sequences from these two toxins showed similarity to those of other PLA2 toxins from viperid snake venoms. ACP-TX-I belongs to the catalytically inactive K49 PLA2 class, while ACP-TX-II is a D49 PLA2, and is enzymatically active. ACP-TX-I PLA2 is monomeric, which results in markedly diminished myotoxic and inflammatory activities when compared with dimeric K49 PLA2s, confirming the hypothesis that dimeric structure contributes heavily to the profound myotoxicity of the most active viperid K49 PLA2s. ACP-TX-II exhibits the main pharmacological actions reported for this protein family, including in vivo local myotoxicity, edema-forming activity, and in vitro cytotoxicity. ACP-TX-I PLA2 is cytotoxic to A549 lung carcinoma cells, indicating that cytotoxicity to these tumor cells does not require enzymatic activity.
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Affiliation(s)
- Salomón Huancahuire-Vega
- Departamento de Ciencias Básicas, Facultad de Ciencias de la Salud, Escuela de Medicina Humana, Universidad Peruana Unión (UPeU), Lima 15, Peru;
- Correspondence: ; Tel.: +51-9-9757-4011
| | - Luciana M. Hollanda
- Instituto de Tecnologia e Pesquisa, Universidade Tiradentes (UNIT), Aracaju 49032-490, SE, Brazil;
| | - Mauricio Gomes-Heleno
- Departamento de Bioquímica, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas 13083-970, SP, Brazil; (M.G.-H.); (S.M.)
| | - Edda E. Newball-Noriega
- Departamento de Ciencias Básicas, Facultad de Ciencias de la Salud, Escuela de Medicina Humana, Universidad Peruana Unión (UPeU), Lima 15, Peru;
| | - Sergio Marangoni
- Departamento de Bioquímica, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas 13083-970, SP, Brazil; (M.G.-H.); (S.M.)
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Ferreira TH, Hollanda LM, Lancellotti M, de Sousa EMB. Boron nitride nanotubes chemically functionalized with glycol chitosan for gene transfection in eukaryotic cell lines. J Biomed Mater Res A 2014; 103:2176-85. [PMID: 25231734 DOI: 10.1002/jbm.a.35333] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [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: 05/08/2014] [Revised: 08/29/2014] [Accepted: 09/11/2014] [Indexed: 11/10/2022]
Abstract
Nanostructured materials have been widely studied concerning their potential biomedical applications, primarily to selectively carry specific drugs or molecules within a tissue or organ. In this context, boron nitride nanotubes (BNNTs) have generated considerable interest in the scientific community because of their unique properties, presenting good chemical inertness and high thermal stability. Among the many applications proposed for BNNTs in the biomedical field in recent years, the most important include their use as biosensors, nanovectors for the delivery of proteins, drugs, and genes. In the present study, BNNTs were synthesized, purified, and functionalized with glycol chitosan through a chemical process, yielding the BNNT-GC. The size of BNNT-GC was reduced using an ultrasound probe. Two samples with different sizes were selected for in vitro assays. The nanostructures were characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), thermal analysis (TGA), and dynamic light scattering (DLS). The in vitro assays MTT and neutral red (NR) were performed with NIH-3T3 and A549 cell lines and demonstrated that this material is not cytotoxic. Furthermore, the BNNT-GC was applied in gene transfection of plasmid pIRES containing a gene region that express a green fluorescent protein (GFP) in NIH-3T3 and A549 cell lines. The gene transfection was characterized by fluorescent protein produced in the cells and pictured by fluorescent microscopy. Our results suggest that BNNT-GC has moderate stability and presents great potential as a gene carrier agent in nonviral-based therapy, with low cytotoxicity and good transfection efficiency.
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Affiliation(s)
- T H Ferreira
- SENAN, Centro de Desenvolvimento da Tecnologia Nuclear, CDTN/CNEN Av. Presidente Antônio Carlos, 6627, Campus da UFMG, Belo Horizonte, MG, CEP 30270-901, Brasil
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Zanin H, Hollanda LM, Ceragioli HJ, Ferreira MS, Machado D, Lancellotti M, Catharino RR, Baranauskas V, Lobo AO. Carbon nanoparticles for gene transfection in eukaryotic cell lines. Mater Sci Eng C Mater Biol Appl 2014; 39:359-70. [PMID: 24863237 DOI: 10.1016/j.msec.2014.03.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 02/18/2014] [Accepted: 03/04/2014] [Indexed: 10/25/2022]
Abstract
For the first time, oxygen terminated cellulose carbon nanoparticles (CCN) was synthesised and applied in gene transfection of pIRES plasmid. The CCN was prepared from catalytic of polyaniline by chemical vapour deposition techniques. This plasmid contains one gene that encodes the green fluorescent protein (GFP) in eukaryotic cells, making them fluorescent. This new nanomaterial and pIRES plasmid formed π-stacking when dispersed in water by magnetic stirring. The frequencies shift in zeta potential confirmed the plasmid strongly connects to the nanomaterial. In vitro tests found that this conjugation was phagocytised by NG97, NIH-3T3 and A549 cell lines making them fluorescent, which was visualised by fluorescent microscopy. Before the transfection test, we studied CCN in cell viability. Both MTT and Neutral Red uptake tests were carried out using NG97, NIH-3T3 and A549 cell lines. Further, we use metabolomics to verify if small amounts of nanomaterial would be enough to cause some cellular damage in NG97 cells. We showed two mechanisms of action by CCN-DNA complex, producing an exogenous protein by the transfected cell and metabolomic changes that contributed by better understanding of glioblastoma, being the major finding of this work. Our results suggested that this nanomaterial has great potential as a gene carrier agent in non-viral based therapy, with low cytotoxicity, good transfection efficiency, and low cell damage in small amounts of nanomaterials in metabolomic tests.
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Affiliation(s)
- H Zanin
- Departamento de Semicondutores, Instrumentos e Fotônica, Faculdade de Engenharia Elétrica e de Computação, Universidade Estadual de Campinas, 13083-852 Campinas, SP, Brazil.
| | - L M Hollanda
- Laboratory of Biotechnology, Department of Biochemistry, Institute of Biology at UNICAMP, Rua Monteiro Lobato 255, Campinas, SP CEP 13083-862, Brazil.
| | - H J Ceragioli
- Departamento de Semicondutores, Instrumentos e Fotônica, Faculdade de Engenharia Elétrica e de Computação, Universidade Estadual de Campinas, 13083-852 Campinas, SP, Brazil
| | - M S Ferreira
- Innovare Biomarkers Laboratory, Medicine and Experimental Surgery Nucleus, UNICAMP, Rua Cinco de Junho, 350, Campinas, São Paulo CEP 13083-877, Brazil
| | - D Machado
- Laboratory of Biotechnology, Department of Biochemistry, Institute of Biology at UNICAMP, Rua Monteiro Lobato 255, Campinas, SP CEP 13083-862, Brazil
| | - M Lancellotti
- Laboratory of Biotechnology, Department of Biochemistry, Institute of Biology at UNICAMP, Rua Monteiro Lobato 255, Campinas, SP CEP 13083-862, Brazil
| | - R R Catharino
- Innovare Biomarkers Laboratory, Medicine and Experimental Surgery Nucleus, UNICAMP, Rua Cinco de Junho, 350, Campinas, São Paulo CEP 13083-877, Brazil
| | - V Baranauskas
- Departamento de Semicondutores, Instrumentos e Fotônica, Faculdade de Engenharia Elétrica e de Computação, Universidade Estadual de Campinas, 13083-852 Campinas, SP, Brazil
| | - A O Lobo
- Laboratory of Biomedical Nanotechnology (NANOBIO), Universidade do Vale do Paraiba (UNIVAP), Av. Shishima Hifumi 2911, Sao Jose dos Campos 12224-000, SP, Brazil
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Mattos IB, Alves DA, Hollanda LM, Ceragiogli HJ, Baranauskas V, Lancellotti M. Effects of multi-walled carbon nanotubes (MWCNT) under Neisseria meningitidis transformation process. J Nanobiotechnology 2011; 9:53. [PMID: 22088149 PMCID: PMC3235062 DOI: 10.1186/1477-3155-9-53] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [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: 03/24/2011] [Accepted: 11/16/2011] [Indexed: 11/10/2022] Open
Abstract
Background This study aimed at verifying the action of multi-walled carbon nanotubes (MWCNT) under the naturally transformable Neisseria meningitidis against two different DNA obtained from isogenic mutants of this microorganism, an important pathogen implicated in the genetic horizontal transfer of DNA, causing the escape of the principal vaccination measured worldwide by the capsular switching process. Materials and methods The bacterium receptor strain C2135 was cultivated and had its mutant DNA donor M2 and M6, which received a receptor strain and MWCNT at three different concentrations. The inhibition effect of DNAse on the DNA in contact with nanoparticles was evaluated. Results The results indicated an in increase in the transformation capacity of N. meninigtidis in different concentrations of MWCNT when compared with negative control without nanotubes. A final analysis of the interaction between DNA and MWCNT was carried out using Raman Spectroscopy. Conclusion These increases in the transformation capacity mediated by MWCNT, in meningococci, indicate the interaction of these particles with the virulence acquisition of these bacteria, as well as with the increase in the vaccination escape process.
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Affiliation(s)
- Ives B Mattos
- LABIOTEC - Biotechnology Laboratory, Department of Biochemistry, Institute of Biology CP6109, University of Campinas - UNICAMP 13083-970, Campinas, SP, Brazil
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Hollanda LM, Cury GC, Pereira RF, Ferreira GA, Sousa A, Sousa EM, Lancellotti M. Effect of mesoporous silica under Neisseria meningitidis transformation process: environmental effects under meningococci transformation. J Nanobiotechnology 2011; 9:28. [PMID: 21787408 PMCID: PMC3152511 DOI: 10.1186/1477-3155-9-28] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [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: 03/12/2011] [Accepted: 07/25/2011] [Indexed: 11/17/2022] Open
Abstract
Background This study aimed the use of mesoporous silica under the naturally transformable Neisseria meningitidis, an important pathogen implicated in the genetic horizontal transfer of DNA causing a escape of the principal vaccination measures worldwide by the capsular switching process. This study verified the effects of mesoporous silica under N. meningitidis transformation specifically under the capsular replacement. Methods we used three different mesoporous silica particles to verify their action in N. meningitis transformation frequency. Results we verified the increase in the capsular gene replacement of this bacterium with the three mesoporous silica nanoparticles. Conclusion the mesouporous silica particles were capable of increasing the capsule replacement frequency in N. meningitidis.
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Affiliation(s)
- Luciana M Hollanda
- Department of Biochemistry, Institute of Biology CP6109, State University of Campinas UNICAMP, CP: 6109-CEP 13083-970, Campinas, SP, Brazil
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Penatti MPA, Hollanda LM, Nakazato G, Campos TA, Lancellotti M, Angellini M, Brocchi M, Rocha MMM, Dias da Silveira W. Epidemiological characterization of resistance and PCR typing of Shigella flexneri and Shigella sonnei strains isolated from bacillary dysentery cases in Southeast Brazil. ACTA ACUST UNITED AC 2008; 40:249-58. [PMID: 17273662 DOI: 10.1590/s0100-879x2007000200012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Accepted: 11/24/2006] [Indexed: 11/22/2022]
Abstract
Shigella spp are Gram-negative, anaerobic facultative, non-motile, and non-sporulated bacilli of the Enterobacteriaceae family responsible for "Shigellosis" or bacillary dysentery, an important cause of worldwide morbidity and mortality. However, despite this, there are very few epidemiological studies about this bacterium in Brazil. We studied the antibiotic resistance profiles and the clonal structure of 60 Shigella strains (30 S. flexneri and 30 S. sonnei) isolated from shigellosis cases in different cities within the metropolitan area of Campinas, State of São Paulo, Brazil. We used the following well-characterized molecular techniques: enterobacterial repetitive intergenic consensus, repetitive extragenic palindromic, and double-repetitive element-polymerase chain reaction to characterize the bacteria. Also, the antibiotic resistance of the strains was determined by the diffusion disk method. Many strains of S. flexneri and S. sonnei were found to be multi-resistant. S. flexneri strains were resistant to ampicillin in 83.3% of cases, chloramphenicol in 70.0%, streptomycin in 86.7%, sulfamethoxazole in 80.0%, and tetracycline in 80.0%, while a smaller number of strains were resistant to cephalothin (3.3%) and sulfazotrim (10.0%). S. sonnei strains were mainly resistant to sulfamethoxazole (100.0%) and tetracycline (96.7%) and, to a lesser extent, to ampicillin (6.7%) and streptomycin (26.7%). Polymerase chain reaction-based typing supported the existence of specific clones responsible for the shigellosis cases in the different cities and there was evidence of transmission between cities. This clonal structure would probably be the result of selection for virulence and resistance phenotypes. These data indicate that the human sanitary conditions of the cities investigated should be improved.
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Affiliation(s)
- M P A Penatti
- Departamento de Microbiologia e Imunologia, Instituto de Biologia, Universidade Estadual de Campinas, 13081-970 Campinas, SP, Brazil
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Hollanda LM, Lima CSP, Cunha AF, Albuquerque DM, Vassallo J, Ozelo MC, Joazeiro PP, Saad STO, Costa FF. An inherited mutation leading to production of only the short isoform of GATA-1 is associated with impaired erythropoiesis. Nat Genet 2006; 38:807-12. [PMID: 16783379 DOI: 10.1038/ng1825] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.0] [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: 03/16/2006] [Accepted: 05/16/2006] [Indexed: 11/10/2022]
Abstract
Acquired somatic mutations in exon 2 of the hematopoietic transcription factor GATA-1 have been found in individuals with Down syndrome with both transient myeloproliferative disorder and acute megakaryoblastic leukemia. These mutations prevent the synthesis of the full-length protein but allow the synthesis of its short isoform, GATA-1s. Experiments in mice suggest that GATA-1s supports normal adult megakaryopoiesis, platelet formation and erythropoiesis. Here we report a mutation, 332G --> C, in exon 2 of GATA1, leading to the synthesis of only the short isoform in seven affected males from two generations of a family. Hematological profiles of affected males demonstrate macrocytic anemia, normal platelet counts and neutropenia in most cases. Altogether, data suggest that GATA-1s alone, produced in low or normal levels, is not sufficient to support normal erythropoiesis. Moreover, this is the first study to indicate that a germline splicing mutation does not lead to leukemia in the absence of other cooperating events, such as Down syndrome.
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Affiliation(s)
- Luciana M Hollanda
- Department of Internal Medicine, Hemocentro, School of Medical Science, Universidade Estadual de Campinas, Campinas, São Paulo 13083-970, Brazil
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