1
|
Silva ICVD, Oliveira PFD, Barbosa GM, Wessjohann LA, Cardozo-Filho L, Holandino C, Muzitano MF, Leal ICR. Passiflora mucronata leaves extracts obtained from different methodologies: a phytochemical study based on cytotoxic and apoptosis activities of triterpenes and phytosterols constituents. BRAZ J PHARM SCI 2020. [DOI: 10.1590/s2175-97902019000417666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
2
|
Mendes AN, Filgueiras LA, Siqueira MRP, Barbosa GM, Holandino C, de Lima Moreira D, Pinto JC, Nele M. Encapsulation of Piper cabralanum (Piperaceae) nonpolar extract in poly(methyl methacrylate) by miniemulsion and evaluation of increase in the effectiveness of antileukemic activity in K562 cells. Int J Nanomedicine 2017; 12:8363-8373. [PMID: 29200848 PMCID: PMC5701609 DOI: 10.2147/ijn.s134756] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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] [Indexed: 12/25/2022] Open
Abstract
This study aimed to synthesize and characterize nanoparticles (NPs) of poly(methyl methacrylate) (PMMA) and evaluate their ability to incorporate plant extracts with antitumor activity and low dissolution in aqueous media. The extract used was n-hexane partition of the methanol extract of Piper cabralanum (PCA-HEX). PMMA NPs were obtained using the mini-emulsion method, which was able to encapsulate almost 100% of PCA-HEX. The synthesized polymeric particles presented with a size of 200 nm and a negative charge. Cytotoxicity tests by MTT and trypan blue assays showed that NPs without PCA-HEX did not kill leukemic cells (K562 cells). NPs containing PCA-HEX were able to enhance cell death when compared to pure extract. The results showed that PMMA NPs could be useful as a drug delivery system as they can enhance the antitumor activity of the PCA-HEX extract by more than 20-fold. PMMA NPs containing plant extracts with antitumor activities may be an alternative to control the evolution of diseases such as leukemia.
Collapse
Affiliation(s)
| | | | - Monica Regina Pimentel Siqueira
- School of Pharmacy, Federal University of Rio Janeiro.,Natural Products Department, Institute of Pharmaceutical Technology, Farmanguinhos, Oswaldo Cruz Foundation, Rio de Janeiro
| | | | | | - Davyson de Lima Moreira
- Natural Products Department, Institute of Pharmaceutical Technology, Farmanguinhos, Oswaldo Cruz Foundation, Rio de Janeiro
| | - José Carlos Pinto
- Chemical Engineering Program - COPPE, Federal University of Rio de Janeiro, Rio de Janeiro
| | - Marcio Nele
- School of Chemistry, Federal University of Rio Janeiro, Rio de Janeiro, Brazil
| |
Collapse
|
3
|
Barbosa GM, Dos Santos EG, Capella FNC, Homsani F, de Pointis Marçal C, Dos Santos Valle R, de Araújo Abi-Chacra É, Braga-Silva LA, de Oliveira Sales MH, da Silva Neto ID, da Veiga VF, Dos Santos ALS, Holandino C. Direct electric current modifies important cellular aspects and ultrastructure features of Candida albicans yeasts: Influence of doses and polarities. Bioelectromagnetics 2016; 38:95-108. [PMID: 27783424 DOI: 10.1002/bem.22015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 10/28/2015] [Accepted: 10/07/2016] [Indexed: 11/09/2022]
Abstract
Available treatments against human fungal pathogens present high levels of resistance, motivating the development of new antifungal therapies. In this context, the present work aimed to analyze direct electric current (DC) antifungal action, using an in vitro apparatus equipped with platinum electrodes. Candida albicans yeast cells were submitted to three distinct conditions of DC treatment (anodic flow-AF; electroionic flow-EIF; and cathodic flow-CF), as well as different charges, ranging from 0.03 to 2.40 C. Our results indicated C. albicans presented distinct sensibility depending on the DC intensity and polarity applied. Both the colony-forming unit assay and the cytometry flow with propidium iodide indicated a drastic reduction on cellular viability after AF treatment with 0.15 C, while CF- and EIF-treated cells stayed alive when DC doses were increased up to 2.40 C. Additionally, transmission electron microscopy revealed important ultrastructural alterations in AF-treated yeasts, including cell structure disorganization, ruptures in plasmatic membrane, and cytoplasmic rarefaction. This work emphasizes the importance of physical parameters (polarity and doses) in cellular damage, and brings new evidence for using electrotherapy to treat C. albicans pathology process. Bioelectromagnetics. 38:95-108, 2017. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Gleyce Moreno Barbosa
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Pharmacy College, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Eldio Gonçalves Dos Santos
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Pharmacy College, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Francielle Neves Carvalho Capella
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Pharmacy College, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fortune Homsani
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Pharmacy College, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Carina de Pointis Marçal
- Peptidases Research Laboratory, Paulo de Góes Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Roberta Dos Santos Valle
- Peptidases Research Laboratory, Paulo de Góes Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Érika de Araújo Abi-Chacra
- Peptidases Research Laboratory, Paulo de Góes Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Lys Adriana Braga-Silva
- Peptidases Research Laboratory, Paulo de Góes Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | | | - Venicio Feo da Veiga
- Microscopy Sector of Paulo de Góes Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - André Luis Souza Dos Santos
- Peptidases Research Laboratory, Paulo de Góes Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Carla Holandino
- Multidisciplinary Laboratory of Pharmaceutical Sciences, Pharmacy College, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| |
Collapse
|
4
|
Holandino C, Teixeira CAA, de Oliveira FAG, Barbosa GM, Siqueira CM, Messeder DJ, de Aguiar FS, da Veiga VF, Girard-Dias W, Miranda K, Galina A, Capella MAM, Morales MM. Direct electric current treatment modifies mitochondrial function and lipid body content in the A549 cancer cell line. Bioelectrochemistry 2016; 111:83-92. [PMID: 27243447 DOI: 10.1016/j.bioelechem.2016.05.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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] [Received: 03/07/2016] [Revised: 05/09/2016] [Accepted: 05/09/2016] [Indexed: 02/04/2023]
Abstract
Electrochemical therapy (EChT) entails treatment of solid tumors with direct electric current (DC). This work evaluated the specific effects of anodic flow generated by DC on biochemical and metabolic features of the A549 human lung cancer cell line. Apoptosis was evaluated on the basis of caspase-3 activity and mitochondrial transmembrane potential dissipation. Cell morphology was analyzed using transmission electron microscopy, and lipid droplets were studied through morphometric analysis and X-ray qualitative elemental microanalysis. High-resolution respirometry was used to assess mitochondrial respiratory parameters. Results indicated A549 viability decreased in a dose-dependent manner with a prominent drop between 18 and 24h after treatment (p<0.001), together with a two-fold increase in caspase-3 activity. AF-treatment induced a significantly increase (p<0.01) in the cell number with disrupted mitochondrial transmembrane potential. Furthermore, treated cells demonstrated important ultrastructural mitochondria damage and a three-fold increase in the cytoplasmic lipid bodies' number, quantified by morphometrical analyses. Conversely, 24h after treatment, the cells presented a two-fold increase of residual oxygen consumption, accounting for 45.3% of basal oxygen consumption. These results show remarkable alterations promoted by anodic flow on human lung cancer cells which are possibly involved with the antitumoral effects of EChT.
Collapse
Affiliation(s)
- Carla Holandino
- Laboratory of Multidisciplinary Pharmaceutical Sciences, College of Pharmacy, Center of Health Sciences (CCS), Federal University do Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Cesar Augusto Antunes Teixeira
- Laboratory of Multidisciplinary Pharmaceutical Sciences, College of Pharmacy, Center of Health Sciences (CCS), Federal University do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Felipe Alves Gomes de Oliveira
- Laboratory of Multidisciplinary Pharmaceutical Sciences, College of Pharmacy, Center of Health Sciences (CCS), Federal University do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Gleyce Moreno Barbosa
- Laboratory of Multidisciplinary Pharmaceutical Sciences, College of Pharmacy, Center of Health Sciences (CCS), Federal University do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Camila Monteiro Siqueira
- Federal Institute of Education, Science and Technology of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Douglas Jardim Messeder
- Laboratory of Bioenergetics and Mitochondrial Physiology, Institute of Medical Biochemistry, CCS, Federal University do Rio de Janeiro, Brazil
| | - Fernanda Silva de Aguiar
- Laboratory of Multidisciplinary Pharmaceutical Sciences, College of Pharmacy, Center of Health Sciences (CCS), Federal University do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Venicio Feo da Veiga
- Laboratory of Electron Microscopy, Institute of Microbiology Prof. Paulo de Góes (IMPPG), CCS, UFRJ, Rio de Janeiro, Brazil
| | - Wendell Girard-Dias
- Laboratory of Cellular Ultrastructure Hertha Meyer, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Kildare Miranda
- Laboratory of Cellular Ultrastructure Hertha Meyer, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Antonio Galina
- Laboratory of Bioenergetics and Mitochondrial Physiology, Institute of Medical Biochemistry, CCS, Federal University do Rio de Janeiro, Brazil
| | | | - Marcelo Marcos Morales
- Laboratory of Molecular and Cellular Physiology, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| |
Collapse
|
5
|
Gomes MDN, Teixeira CAA, Barbosa GM, Froes MT, Silva MB, da Veiga VF, Soares RMDA, dos Santos ALS, Holandino C. Effects of direct electric current on Herpetomonas samuelpessoai: An ultrastructural study. Bioelectromagnetics 2011; 33:334-45. [DOI: 10.1002/bem.20712] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Accepted: 09/18/2011] [Indexed: 01/28/2023]
|
6
|
da Volta Soares M, Oliveira MR, dos Santos EP, de Brito Gitirana L, Barbosa GM, Quaresma CH, Ricci-Júnior E. Nanostructured delivery system for zinc phthalocyanine: preparation, characterization, and phototoxicity study against human lung adenocarcinoma A549 cells. Int J Nanomedicine 2011; 6:227-38. [PMID: 21499420 PMCID: PMC3075896 DOI: 10.2147/ijn.s15860] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
In this study, zinc phthalocyanine (ZnPc) was loaded onto poly-ɛ-caprolactone (PCL) nanoparticles (NPs) using a solvent emulsification–evaporation method. The process yield and encapsulation efficiency were 74.2% ± 1.2% and 67.1% ± 0.9%, respectively. The NPs had a mean diameter of 187.4 ± 2.1 nm, narrow distribution size with a polydispersity index of 0.096 ± 0.004, zeta potential of −4.85 ± 0.21 mV, and spherical shape. ZnPc has sustained release, following Higuchi’s kinetics. The photobiological activity of the ZnPc-loaded NPs was evaluated on human lung adenocarcinoma A549 cells. Cells were incubated with free ZnPc or ZnPc-loaded NPs for 4 h and then washed with phosphate-buffered saline. Culture medium was added to the wells containing the cells. Finally, the cells were exposed to red light (660 nm) with a light dose of 100 J/cm2. The cellular viability was determined after 24 h of incubation. ZnPc-loaded NPs and free photosensitizer eliminated about 95.9% ± 1.8% and 28.7% ± 2.2% of A549 cells, respectively. The phototoxicity was time dependent up to 4 h and concentration dependent at 0–5 μg ZnPc. The cells viability decreased with the increase of the light dose in the range of 10–100 J/cm2. Intense lysis was observed in the cells incubated with the ZnPcloaded NPs and irradiated with red light. ZnPc-loaded PCL NPs are the release systems that promise photodynamic therapy use.
Collapse
Affiliation(s)
- Mariana da Volta Soares
- Department of Medicines, Laboratório de Desenvolvimento Galênico, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | | | | | | | | | | |
Collapse
|
7
|
Barbosa GM, Marzochi MC, Massard CL, Lima GP, Confort EM. [Epidemiological aspects of canine American tegumentary leishmaniasis in the Municipality of Paraty, State of Rio de Janeiro, brazil]. CAD SAUDE PUBLICA 1999; 15:641-6. [PMID: 10502161 DOI: 10.1590/s0102-311x1999000300022] [Citation(s) in RCA: 15] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
American tegumentary leishmaniasis (ATL) is endemic in the State of Rio de Janeiro, with the highest incidence observed in the municipalities along the Southern coast. A total of 169 human cases were reported from 1993 to 1995 in the municipality of Paraty, representing 15% of all case reports in the State of Rio de Janeiro during that period. From March to December, 1996, a survey was conducted in endemic american tegumentary leishmaniasis (ATL) areas (Praia Grande, Taquari, Várzea do Machado, and Graúna) in Paraty. 326 households with 215 pet dogs were surveyed. The initial study consisted of taking venous blood samples to perform RIFI and ELISA tests. The canine skin test was performed during the same visit and was positive in 8.8% of dogs. Of the 215 dogs, 5 presented lesions suspected of ATL; biopsies and the vacuum aspiration technique were performed on these cases. Correlating the study areas with the results obtained, some dogs presented sub-clinical infection, highly relevant to studies on canine ATL infection in the State of Rio de Janeiro.
Collapse
Affiliation(s)
- G M Barbosa
- Departamento de Ciências Biológicas, Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz, Rua Leopoldo Bulhões 1480, Rio de Janeiro, RJ 21041-210, Brasil.
| | | | | | | | | |
Collapse
|
8
|
Abstract
A case of a young man who presented symptoms and clinical signs of polyneuropathy that occurred in connection with recurrent hypoglycemic episodes is reported. The hypoglycemia was probably caused by a pancreatic islet tumor. There were symmetric weakness and wasting of hands and feet, absent tendon reflexes and 'glove and stocking' loss of sensation. Electromyographic studies showed denervation potentials with slight reduction of nerve conduction velocities. Sural nerve biopsy studied by optic and electronic microscopy showed axonal degeneration without signs of demyelination or remyelination. There are only 30 similar cases reported in the literature. According to experimental findings, the authors believe that glucopenia is the mechanism responsible for the development of the neuropathy, and that at present time there is no evidence for a direct insulin effect.
Collapse
Affiliation(s)
- M R de Freitas
- Departamentos de Medicina Clínica e de Patologia, Faculdade de Medicina, Universidade Federal Fluminense
| | | | | | | |
Collapse
|