1
|
Vieira P, Jesus V, Cândido MA, Pacheco-Soares C, Castilho M, Raniero L. Specific nanomarkers fluorescence in vitro analysis for EGFR overexpressed cells in triple-negative breast cancer and malign glioblastoma. Photodiagnosis Photodyn Ther 2022; 39:102997. [PMID: 35781094 DOI: 10.1016/j.pdpdt.2022.102997] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 06/28/2022] [Accepted: 06/29/2022] [Indexed: 10/17/2022]
Abstract
BACKGROUND Epidermal Growth Factor Receptor (EGFR receptor) is encoded by the EGFR gene. EGFR receptor signaling pathways are activated by EGF protein, regulating cell actions. Overexpression of EGFR receptor may be linked to malignancies with a poor prognosis. As a result, EGFR receptor is being studied for a variety of tumor diagnostics, spurring the development of innovative approaches to increase quality and efficiency. Nanomaterials can recognize cancer cells by specifically targeting of molecular pathways, underscoring the importance of nanomedicine. In this study, we synthesized EGFR-specific nanomarkers by functionalizing EGF protein and Chlorin e6 in gold nanoparticles. These nanoparticles use active targeting to deliver EGF protein to EGFR receptor, and Chlorin e6 serves as a fluorescent marker molecule METHODS: : Nanomarkers were examined in vitro in MDA-MB-468 and M059J cell lines. Confocal microscopy and flow cytometry were used to examine the distribution, uptake, internalization, and fluorescence intensity of nanomarkers in vitro RESULTS: : The results show that both lines examined accumulate nanomarkers. However, MDA-MB-468 had the highest intensity due to its EGFR receptor overexpression properties CONCLUSION: : The findings point to ideal properties for detecting EGFR receptor overexpressed cells.
Collapse
Affiliation(s)
- Paula Vieira
- Nanosensors Laboratory, Research & Development Institute, Vale do Paraíba University, 12244-000, São José dos Campos, São Paulo, Brazil.
| | - Viviane Jesus
- Nanosensors Laboratory, Research & Development Institute, Vale do Paraíba University, 12244-000, São José dos Campos, São Paulo, Brazil.
| | - Marcela Aparecida Cândido
- Nanosensors Laboratory, Research & Development Institute, Vale do Paraíba University, 12244-000, São José dos Campos, São Paulo, Brazil.
| | - Cristina Pacheco-Soares
- Dynamics of Cellular Compartments Laboratory, Research & Development Institute, Vale do Paraíba University, 12244-000, São José dos Campos, São Paulo, Brazil.
| | - Maiara Castilho
- Bionanotechnology Laboratory, Research & Development Institute, Vale do Paraíba University, 12244-000, São José dos Campos, São Paulo, Brazil.
| | - Leandro Raniero
- Nanosensors Laboratory, Research & Development Institute, Vale do Paraíba University, 12244-000, São José dos Campos, São Paulo, Brazil.
| |
Collapse
|
2
|
Fontana LC, Pinto JG, Vitorio GDS, Ferreira I, Pacheco-Soares C, Mamone LA, Strixino JF. Photodynamic effect of protoporphyrin IX in gliosarcoma 9l/lacZ cell line. Photodiagnosis Photodyn Ther 2021; 37:102669. [PMID: 34863947 DOI: 10.1016/j.pdpdt.2021.102669] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 11/29/2022]
Abstract
Photodynamic Therapy (PDT) is an oncologic treatment, producing reactive oxygen species (ROS) to induce the death of cancer cells. This study aimed to evaluate the action of PDT on gliosarcoma cells, using protoporphyrin IX as PS by incubation with the precursor aminolevulinic acid (ALA). An LED device was used with a light dose of 10 J/cm². The success of the therapy proved to be dependent on the concentration of ALA, and an incubation time of 4 h required for an effective response. Cell death was prevalent due to necrosis when assessed 18 h post-PDT. ALA proved to be an option to PDT in cells of the 9 L/lacZ, with the protocol tested.
Collapse
Affiliation(s)
- Letícia Corrêa Fontana
- Photobiology Applied to Health - Universidade do Vale do Paraíba. Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo
| | - Juliana Guerra Pinto
- Photobiology Applied to Health - Universidade do Vale do Paraíba. Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo
| | - Gabrielle Dos Santos Vitorio
- Photobiology Applied to Health - Universidade do Vale do Paraíba. Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo
| | - Isabelle Ferreira
- Photobiology Applied to Health - Universidade do Vale do Paraíba. Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo
| | - Cristina Pacheco-Soares
- Laboratory of Cellular Dynamics - Universidade do Vale do Paraíba. Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo
| | - Leandro Ariel Mamone
- Centro de Investigaciones sobre Porfirinas y Porfirias (CIPYP), CONICET and Hospital de Clínicas José de San Martín, Universidad de Buenos Aires. Córdoba 2351 1er subsuelo, Ciudad de Buenos Aires CP1120AAF, Argentina
| | - Juliana Ferreira Strixino
- Photobiology Applied to Health - Universidade do Vale do Paraíba. Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo.
| |
Collapse
|
3
|
Salles GN, Calió ML, Hölscher C, Pacheco-Soares C, Porcionatto M, Lobo AO. Neuroprotective and restorative properties of the GLP-1/GIP dual agonist DA-JC1 compared with a GLP-1 single agonist in Alzheimer's disease. Neuropharmacology 2019; 162:107813. [PMID: 31628935 DOI: 10.1016/j.neuropharm.2019.107813] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [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: 04/22/2019] [Revised: 09/25/2019] [Accepted: 10/14/2019] [Indexed: 12/17/2022]
Abstract
The sister incretins glucagon-like peptide-1 (GLP-1) and glucagon dependent insulinotropic polypeptide (GIP) are growth factors responsible for re-sensitizing insulin signalling. Interestingly, their analogues, originally developed to treat type 2 diabetes (T2D), have demonstrated a range of neuroprotective and neurorestorative properties. Novel peptide GLP-1/GIP dual agonist (DA) shows good effects in diabetic patients, superior to the effects demonstrated by single GIP or GLP-1 mimetics. Furthermore, novel DAs have shown considerable neuroprotection in neurodegenerative models. Here, we investigated the neuroprotective and restorative involvement of the DA DA-JC1 and liraglutide (Lg), a single GLP-1 receptor analogue, in vitro using human neuroblastoma (SH-SY5Y) against oxidative stress induced by oxygen peroxide (H2O2), and in vivo, in a mouse model of Alzheimer's disease (AD), APP/PS1. First, we determined the ideal concentration of the peptides and demonstrated that DA-JC1 protects cells against oxidative stress more than Lg, improving cell viability, normalizing reactive oxygen species (ROS) and attenuating DNA damage generated by H2O2. Moreover, in 10-to-12-months-old APP/PS1 animals treated for 4 weeks, both Lg and DA-JC1 were very efficient in stimulating neurogenesis and reducing some important hallmarks of AD, but DA-JC1 was better than Lg in attenuating crucial neuroinflammatory markers, especially reactive astrocyte, in both wild-type (WT) and APP/PS1 hippocampal regions. Altogether, this study suggests an interactive role of GLP-1 and GIP receptors, enhancing the efficiency of single GLP-1 analogues, especially in attenuating oxidative stress and neuroinflammation. We confirm that combining GLP-1 and GIP results in a variety of beneficial effects, providing key evidences for the development of a promising therapeutic strategy for AD.
Collapse
Affiliation(s)
- Geisa Nogueira Salles
- Laboratory of Dynamics of Cellular Compartments, Instituto de Pesquisa e Desenvolvimento (IP&D), Universidade Do Vale Do Paraiba, Av. Shishima Hifumi, 2911, 12244-000, Sao Jose Dos Campos, SP, Brazil; Departament of Biochemestry, Laboratory of Neurobiology, Universidade Federal de Sao Paulo, Rua Pedro de Toledo, 669, 04039-032, Sao Paulo, SP, Brazil
| | - Michele Longoni Calió
- Departament of Biochemestry, Laboratory of Neurobiology, Universidade Federal de Sao Paulo, Rua Pedro de Toledo, 669, 04039-032, Sao Paulo, SP, Brazil
| | - Christian Hölscher
- Research and Experimental Center, Henan University of Chinese Medicine, 450000, Zhengzhou City, Henan province, China
| | - Cristina Pacheco-Soares
- Laboratory of Dynamics of Cellular Compartments, Instituto de Pesquisa e Desenvolvimento (IP&D), Universidade Do Vale Do Paraiba, Av. Shishima Hifumi, 2911, 12244-000, Sao Jose Dos Campos, SP, Brazil
| | - Marimelia Porcionatto
- Departament of Biochemestry, Laboratory of Neurobiology, Universidade Federal de Sao Paulo, Rua Pedro de Toledo, 669, 04039-032, Sao Paulo, SP, Brazil
| | - Anderson Oliveira Lobo
- LIMAV - Interdisciplinary Laboratory for Advanced Materials, Materials Science & Engineering Graduate Program, UFPI - Federal University of Piauí, 64049-550, Teresina, PI, Brazil.
| |
Collapse
|
4
|
Salles GN, Calió ML, Afewerki S, Pacheco-Soares C, Porcionatto M, Hölscher C, Lobo AO. Prolonged Drug-Releasing Fibers Attenuate Alzheimer's Disease-like Pathogenesis. ACS Appl Mater Interfaces 2018; 10:36693-36702. [PMID: 30298718 DOI: 10.1021/acsami.8b12649] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Delivering drugs and agents to the brain is a huge challenge, especially for chronic neurodegenerative disorders, such as Alzheimer's disease (AD). For this, prolonged and sustained release methods to increase brain uptake represent an impacting concept. The bioresorbable polymer poly-lactic acid (PLA) has high potential for medical implants; at the same time, glucagon-like peptide-1 (GLP-1) analogues have considerable neuroprotective attributes and represent a therapeutic strategy for AD. Here, a biodevice is produced by electrospinning PLA with a GLP-1 analogue (liraglutide, LG), coated with a thin layer of gelatin. The biodevice is subcutaneously implanted in a transgenic mouse model of AD and LG is released for 14 days in mice serum. After 4 weeks of implantation, crucial hallmarks of the AD are highly diminished: hippocampal senile amyloid β plaque load and neuroinflammatory markers. Furthermore, neurogenesis is enhanced in the subventricular zone, an important neurogenic niche in the brain. The designed biodevice holds great promise for being an affordable candidate to act as a prolonged drug provider, promoting LG mission through increasing its lifetime, constituting a relevant approach for old and impaired brain.
Collapse
Affiliation(s)
- Geisa Nogueira Salles
- Laboratory of Dynamics of Cellular Compartments, Instituto de Pesquisa e Desenvolvimento , Universidade do Vale do Paraiba , Sao Jose dos Campos 12244-000 , São Paulo , Brazil
- Department of Biochemistry, Neurobiology Laboratory, Escola Paulista de Medicina , Universidade Federal São Paulo , São Paulo 04021-00 , Brazil
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine , Lancaster University , Lancaster LA1 4YQ , U.K
| | - Michele Longoni Calió
- Department of Biochemistry, Neurobiology Laboratory, Escola Paulista de Medicina , Universidade Federal São Paulo , São Paulo 04021-00 , Brazil
| | - Samson Afewerki
- Division of Engineering in Medicine, Department of Medicine, Harvard Medical School , Brigham & Women's Hospital , Cambridge , Massachusetts 02139 , United States
- Harvard-MIT Division of Health Science and Technology , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Cristina Pacheco-Soares
- Laboratory of Dynamics of Cellular Compartments, Instituto de Pesquisa e Desenvolvimento , Universidade do Vale do Paraiba , Sao Jose dos Campos 12244-000 , São Paulo , Brazil
| | - Marimelia Porcionatto
- Department of Biochemistry, Neurobiology Laboratory, Escola Paulista de Medicina , Universidade Federal São Paulo , São Paulo 04021-00 , Brazil
| | - Christian Hölscher
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine , Lancaster University , Lancaster LA1 4YQ , U.K
| | - Anderson O Lobo
- Institute of Science and Technology , Universidade Brasil , Itaquera 08230-030 , São Paulo , Brazil
- LIMAv-Interdisciplinary Laboratory for Advanced Materials, PPGCM-Materials Science and Engineering Graduate Program , UFPI-Federal University of Piaui , Teresina 64049-550 , Piauí , Brazil
- Department of Chemistry , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139-4307 , United States
| |
Collapse
|
5
|
Souza RKDF, Carvalho ICS, Costa CGDCM, da Silva NS, Pacheco-Soares C. Alteration of Surface Glycoproteins After Photodynamic Therapy. Photomed Laser Surg 2018; 36:452-456. [PMID: 30020857 DOI: 10.1089/pho.2018.4464] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Cell membranes have been identified as an important intracellular cancer treatment target, since the glycoconjugates present on the cell surface are involved in numerous cell functions. Photodynamic therapy (PDT) is a therapeutic modality employed in the treatment of tumors that uses visible light to activate a photosensitizer. OBJECTIVE This study analyzed the expression of surface carbohydrates after PDT with two different photosensitizers, 5-aminolevulinic acid (ALA) and Photosan-3. METHODS Mice were injected subcutaneously with 2 × 105 B16 cells. After 7-10 days, the presence of a tumor with a diameter of 3.6 mm was observed. Photosan-3® and 5-aminolevulinic acid-ALA were used in the PDT treatment. Control animals (not submitted to either laser treatment or photosensitizer injection) and treated animals were euthanized 15 days post-treatment. The tumors were irradiated with a red diode laser, λ = 655 nm, energy density of 10 J.cm-2, and power density of 45 mW.cm-2. After 2 weeks of treatment with PDT, the mice were euthanized, the tumors were collected, and the cell surfaces were labeled with lectins concanavalin A (ConA) and wheat germ agglutinin (WGA). RESULTS Fluorescence microscopy analysis of the cell surfaces with lectins ConA and WGA showed the presence of α-mannose and α-glucose. CONCLUSIONS The combined effects of either Photosan-3 or ALA and red laser light on melanoma suggest an inhibitory glycosylation action from PDT on the surface of B16-F10 cells.
Collapse
Affiliation(s)
- Roberta Kelly de Faria Souza
- 1 Laboratory Dynamics of Cellular Compartments, Institute of Research and Development-IP&D, Universidade do Vale do Paraíba-UNIVAP , São José dos Campos, São Paulo, Brazil
| | - Isabel Chaves Silva Carvalho
- 1 Laboratory Dynamics of Cellular Compartments, Institute of Research and Development-IP&D, Universidade do Vale do Paraíba-UNIVAP , São José dos Campos, São Paulo, Brazil
| | - Carolina Genúncio da Cunha Menezes Costa
- 1 Laboratory Dynamics of Cellular Compartments, Institute of Research and Development-IP&D, Universidade do Vale do Paraíba-UNIVAP , São José dos Campos, São Paulo, Brazil
| | - Newton Soares da Silva
- 2 Institute of Research and Development-IP&D, Laboratory of Cell Biology and Tissue, Universidade do Vale do Paraíba-UNIVAP , São José dos Campos, São Paulo, Brazil
| | - Cristina Pacheco-Soares
- 1 Laboratory Dynamics of Cellular Compartments, Institute of Research and Development-IP&D, Universidade do Vale do Paraíba-UNIVAP , São José dos Campos, São Paulo, Brazil
| |
Collapse
|
6
|
Salles GN, Calió ML, Holscher C, Pacheco-Soares C, Porcionatto M, Oliveira Lobo A. P3‐067: POLY(LACTIC ACID) (PLA) ELECTROSPUN FIBERS IMPROVE NEUROGENESIS AND REDUCE β‐AMYLOID PLAQUES IN A TRANSGENIC MOUSE MODEL OF ALZHEIMER'S DISEASE. Alzheimers Dement 2018. [DOI: 10.1016/j.jalz.2018.06.1423] [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: 10/28/2022]
Affiliation(s)
- Geisa Nogueira Salles
- Universidade do Vale do ParaíbaSão José dos CamposBrazil
- Lancaster UniversityLancasterUnited Kingdom
- Universidade Federal de São PauloSão PauloBrazil
| | | | | | | | | | - Anderson Oliveira Lobo
- Universidade do Vale do ParaíbaSão José dos CamposBrazil
- Universidade BrasilSão PauloBrazil
- Harvard Medical SchoolCambridgeMAUSA
- Northeastern UniversityBostonMAUSA
| |
Collapse
|
7
|
Margraf-Ferreira A, Carvalho ICS, Machado SM, Pacheco-Soares C, Galvão CW, Etto RM, da Silva NS. DNA analysis of cattle parasitic protozoan Tritrichomonas foetus after photodynamic therapy. Photodiagnosis Photodyn Ther 2017; 18:193-197. [PMID: 28238893 DOI: 10.1016/j.pdpdt.2017.02.012] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 02/16/2017] [Accepted: 02/21/2017] [Indexed: 11/15/2022]
Abstract
Photodynamic therapy (PDT) is a modality of therapy that involves the activation of photosensitive substances and the generation of cytotoxic oxygen species and free radicals to promote the selective destruction of target tissues. This study analyzed the application of PDT to Tritrichomonas foetus, a scourged and etiological agent of bovine trichomoniasis, a sexually transmitted infectious disease. As it is an amitochondrial and aerotolerant protozoan, it produces energy under low O2 tension via hydrogenosome. T. foetus from an axenic culture was incubated with photosensitizer tetrasulfonated aluminium phthalocyanine and then irradiated with a laser source (InGaAIP) at a density of 4.5Jcm-2. The DNA integrity of the control and treated group parasites was analyzed by conventional gel electrophoresis and comet assay techniques. In previous results, morphological changes characterized by apoptotic cell death were observed after T. foetus was submitted to PDT treatment. In the treated groups, T. foetus DNA showed a higher concentration of small fragments, about 200pb, in gel electrophoresis after PDT. In the comet assay, the DNA tail percentage was significantly higher in the treated groups. These results demonstrate that PDT leads to DNA fragmentation with changes in nuclear morphology and apoptotic features.
Collapse
Affiliation(s)
- A Margraf-Ferreira
- Research and Development Institute, UNIVAP, São José dos Campos, SP 12244-000, Brazil
| | - I C S Carvalho
- Biosciences and Oral Diagnosis Department, ICT/UNESP, São José dos Campos, SP, Brazil
| | - S M Machado
- Research and Development Institute, UNIVAP, São José dos Campos, SP 12244-000, Brazil
| | - C Pacheco-Soares
- Research and Development Institute, UNIVAP, São José dos Campos, SP 12244-000, Brazil
| | - C W Galvão
- Structural, Molecular and Genetics Biology Department, UEPG, Ponta Grossa, PR, Brazil
| | - R M Etto
- Chemistry Department, UEPG, Ponta Grossa, PR, Brazil
| | - N S da Silva
- Research and Development Institute, UNIVAP, São José dos Campos, SP 12244-000, Brazil.
| |
Collapse
|
8
|
Pinto GP, Lopes KAR, Salles NG, Pacheco-Soares C. N-acetyl Glucosamine Distribution and Mitochondrial Activity of Tumor Cell Exposed to Photodynamic Therapy. J Fluoresc 2016; 26:1923-1926. [PMID: 27596233 DOI: 10.1007/s10895-016-1914-0] [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: 12/08/2015] [Accepted: 08/26/2016] [Indexed: 01/24/2023]
Abstract
The use of lectins can play an important role for tracking modification on cell surface components, since lectins can be easily complexed with radioisotopes, biotin or fluorescein, facilitating the evaluation of carbohydrates distribution in the cell and mitochondrial activity. The aim of this study was to evaluate photodynamic therapy effects on indirect distribution of N-acetyl-glucosamine terminal glycoproteins, in human laryngeal carcinoma HEp-2 cell line surface, using lectin wheat germ agglutinin (WGA) and on mitochondrial activity, for the same cell line, using MitoTracker. The photosensitizer Aluminum Phthalocyanine Tetrasulfonate (AlPcS4) was administrated at 10 μM/mL, followed by an incubation period for its accumulation in the tumor cells, which were irradiated with laser diode λ = 685 nm and energy density of 4.5 J/cm2. Our results indicated that, after Photodynamic Therapy (PDT), it was observed N-acetyl glucosamine terminal glycoprotein expression and mitochondrial O2 production, compared to the control group. Based on these results, we suggest that PDT influences the O2 mitochondrial production and the presence of surface glycoproteins N-acetyl glucosamine terminals.
Collapse
Affiliation(s)
- G P Pinto
- Faculdade de Ciências da Saúde, Universidade do Vale do Paraíba (Univap), Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo, Brazil
| | - K A R Lopes
- Instituto de Pesquisa & Desenvolvimento (IP&D) - Laboratório Dinâmica de Compartimentos Celulares, Universidade do Vale do Paraíba (Univap), Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo, Brazil
| | - N G Salles
- Instituto de Pesquisa & Desenvolvimento (IP&D) - Laboratório Dinâmica de Compartimentos Celulares, Universidade do Vale do Paraíba (Univap), Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo, Brazil.,Instituto de Pesquisa & Desenvolvimento (IP&D) - Laboratório de Nanotecnologia Biomédica (NANOBIO), Universidade do Vale do Paraíba (Univap), Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo, Brazil
| | - C Pacheco-Soares
- Instituto de Pesquisa & Desenvolvimento (IP&D) - Laboratório Dinâmica de Compartimentos Celulares, Universidade do Vale do Paraíba (Univap), Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo, Brazil.
| |
Collapse
|
9
|
Salles GN, Pereira FADS, Pacheco-Soares C, Marciano FR, Hölscher C, Webster TJ, Lobo AO. A Novel Bioresorbable Device as a Controlled Release System for Protecting Cells from Oxidative Stress from Alzheimer’s Disease. Mol Neurobiol 2016; 54:6827-6838. [DOI: 10.1007/s12035-016-0200-0] [Citation(s) in RCA: 9] [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] [Received: 07/19/2016] [Accepted: 10/11/2016] [Indexed: 12/15/2022]
|
10
|
Carvalho ICS, Dutra TP, De Andrade DP, Balducci I, Pacheco-Soares C, Rocha RFD. High doses of alcohol during pregnancy cause DNA damages in osteoblasts of newborns rats. ACTA ACUST UNITED AC 2015; 106:122-32. [DOI: 10.1002/bdra.23468] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Isabel Chaves Silva Carvalho
- Institute of Science and Technology, UNESP - Univ Estadual Paulista, Sao Jose dos Campos (SP), Department of Biosciences and Oral Diagnosis; Sao Jose dos Campos; Sao Paulo Brazil
| | - Tamires Pereira Dutra
- Institute of Science and Technology, UNESP - Univ Estadual Paulista, Sao Jose dos Campos (SP), Department of Biosciences and Oral Diagnosis; Sao Jose dos Campos; Sao Paulo Brazil
| | - Dennia Perez De Andrade
- Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments; Sao Jose dos Campos; Sao Paulo Brazil
| | - Ivan Balducci
- Institute of Science and Technology, UNESP - Univ Estadual Paulista, Sao Jose dos Campos (SP), Department of Social Science and Pediatric Dentristy; Sao Jose dos Campos; Sao Paulo Brazil
| | - Cristina Pacheco-Soares
- Institute of Research and Development - IP&D, Universidade do Vale do Paraíba - UNIVAP, Laboratory Dynamics of Cellular Compartments; Sao Jose dos Campos; Sao Paulo Brazil
| | - Rosilene Fernandes da Rocha
- Institute of Science and Technology, UNESP - Univ Estadual Paulista, Sao Jose dos Campos (SP), Department of Biosciences and Oral Diagnosis; Sao Jose dos Campos; Sao Paulo Brazil
| |
Collapse
|
11
|
Lopes KAR, DE Campos Velho NMR, Pacheco-Soares C. Method of isolation and characterization of Girardia tigrina stem cells. Biomed Rep 2014; 3:163-166. [PMID: 25798241 DOI: 10.3892/br.2014.408] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 12/04/2014] [Accepted: 12/10/2014] [Indexed: 02/02/2023] Open
Abstract
Tissue regeneration is widely studied due to its importance for understanding the biology of stem cells, aiming at their application in medicine for therapeutic and various other purposes. The establishment of experimental models is necessary, as certain invertebrates and vertebrates have different regeneration abilities depending on their taxon position on the evolutionary scale. Planarians are an efficacious in vivo model for stem cell biology, but the correlation between planarian cellular and molecular neoblast pluripotency mechanisms and those of mammalian stem cells is unknown. The present study had the following objectives: i) Establish Girardia tigrina cell culture, ii) determine the time required for complete cell disintegration and iii) obtain neoblasts by cell subdivision. Twenty-four specimens were deprived of food for seven days. After this time, disintegration was performed by incubation protected at three temperatures for 48 h in an antibiotic, antimycotic and trypsin solution, after which the suspension was homogenized and centrifuged. Histopaque® 1077 was used for cell separation and interphases were collected and monitored by optical and fluorescence microscopy. Optical microscopy analysis informed the nucleus-to-cytoplasm ratio, cell morphology and cell size. Under fluorescence microscopy, interphase 1 (I1) was subdivided into two groups and neoblasts were marked for characterization; one group was stained with 4',6-diamidino-2-phenylindole and the other was immunolabeled with octamer-binding transcription factor 4 (OCT4) and isolated and observed after 10 days of cultivation. Neoblasts predominated in I1 with a small amount of other cell types. In conclusion, sample disintegration with a trypsin and antibiotic solution was effective at 18˚C and Iscove's modified Dulbecco's medium supplemented with fetal bovine serum was adequate for the establishment of primary cell cultures after 48-h incubation and centrifugation. Antibody anti-OCT4 was used for the characterization of stem cells and was successfully labeled with concentrated neoblasts on interphase 1.
Collapse
Affiliation(s)
- K A R Lopes
- Laboratory Planarians, Nature Study Center, University of Vale do Paraíba, São José dos Campos, SP 12244-000, Brazil ; Laboratory of Dynamics of Cellular Compartments, Institute of Research and Development, University of Vale do Paraíba, São José dos Campos, SP 12244-000, Brazil
| | - N M R DE Campos Velho
- Laboratory of Dynamics of Cellular Compartments, Institute of Research and Development, University of Vale do Paraíba, São José dos Campos, SP 12244-000, Brazil
| | - C Pacheco-Soares
- Laboratory of Dynamics of Cellular Compartments, Institute of Research and Development, University of Vale do Paraíba, São José dos Campos, SP 12244-000, Brazil
| |
Collapse
|
12
|
Abstract
Low-level laser therapy has become an important tool for bio-modulation process. It can induce stimulatory or inhibitory effects according to cell behavior at specific irradiation. Our objective was to determine L929 cell line response to irradiation at λ 685 and 830 nm, concentrations of 5 and 10% fetal bovine serum and different energy densities of 0.1, 0.5, 1, 2, 3, 5, 7, 10, 20, and 30 J/cm(2). Thus, cells were plated at 1 × 10(5) cells/mL and irradiated with semiconductor laser As-Ga-Al. Twenty-four hours after irradiation, cells were subjected to MTT, neutral red, crystal violet tests, and cell staining was performed using the kit Alexa Fluor 488 Annexin V-FITC and propidium iodide. Our results showed that low-level laser therapy stimulates effect when the energy density is 5 to 3030 J/cm(2) and inhibits effects on energy density 0.1 to 3 J/cm(2). This inhibitory effect was evidenced by the absence of dead cells labeled, decreased cell density, and by the absorption of neutral red in intact cells. The study also demonstrated that fetal bovine serum, at different concentrations, did not affect response of the cells after irradiation.
Collapse
Affiliation(s)
- Juliana Mangolin Marques
- Laboratory of Tissue and Cell Biology, Development and Research Institute, Universidade do Vale do Paraíba (UNIVAP), Urbanova, 12244-000 São José dos Campos, Brazil Laboratory of Dynamics of Cellular Compartments, Development and Research Institute, Universidade do Vale do Paraíba (UNIVAP), Urbanova, 12244-000 São José dos Campos, Brazil
| | - Cristina Pacheco-Soares
- Laboratory of Dynamics of Cellular Compartments, Development and Research Institute, Universidade do Vale do Paraíba (UNIVAP), Urbanova, 12244-000 São José dos Campos, Brazil
| | - Newton Soares Da Silva
- Laboratory of Tissue and Cell Biology, Development and Research Institute, Universidade do Vale do Paraíba (UNIVAP), Urbanova, 12244-000 São José dos Campos, Brazil
| |
Collapse
|
13
|
Pacheco-Soares C, Maftou-Costa M, DA Cunha Menezes Costa CG, DE Siqueira Silva AC, Moraes KCM. Evaluation of photodynamic therapy in adhesion protein expression. Oncol Lett 2014; 8:714-718. [PMID: 25013490 PMCID: PMC4081276 DOI: 10.3892/ol.2014.2149] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 08/08/2013] [Accepted: 02/18/2014] [Indexed: 11/06/2022] Open
Abstract
Photodynamic therapy (PDT) is a treatment modality that has clinical applications in both non-neoplastic and neoplastic diseases. PDT involves a light-sensitive compound (photosensitizer), light and molecular oxygen. This procedure may lead to several different cellular responses, including cell death. Alterations in the attachment of cancer cells to the substratum and to each other are important consequences of photodynamic treatment. PDT may lead to changes in the expression of cellular adhesion structure and cytoskeleton integrity, which are key factors in decreasing tumor metastatic potential. HEp-2 cells were photosensitized with aluminum phthalocyanine tetrasulfonate and zinc phthalocyanine, and the proteins β1-integrin and focal adhesion kinase (FAK) were assayed using fluorescence microscopy. The verification of expression changes in the genes for FAK and β1 integrin were performed by reverse transcription-polymerase chain reaction (RT-PCR). The results revealed that HEp-2 cells do not express β-integrin or FAK 12 h following PDT. It was concluded that the PDT reduces the adhesive ability of HEp-2 cells, inhibiting their metastatic potential. The present study aimed to analyze the changes in the expression and organization of cellular adhesion elements and the subsequent metastatic potential of HEp-2 cells following PDT treatment.
Collapse
Affiliation(s)
- Cristina Pacheco-Soares
- Laboratory of Dynamics of Cellular Compartments, University of Vale do Paraiba, Institute for Research and Development, São José dos Campos-SP 12244-000, Brazil
| | - Maira Maftou-Costa
- Department of Pharmacology, Federal University of São Paulo, São Paulo-SP 04021-001, Brazil
| | - Carolina Genúncio DA Cunha Menezes Costa
- Laboratory of Dynamics of Cellular Compartments, University of Vale do Paraiba, Institute for Research and Development, São José dos Campos-SP 12244-000, Brazil
| | - Andreza Cristina DE Siqueira Silva
- Laboratory of Dynamics of Cellular Compartments, University of Vale do Paraiba, Institute for Research and Development, São José dos Campos-SP 12244-000, Brazil
| | - Karen C M Moraes
- University of São Paulo, Institute of Biosciences of Rio Claro, Rio Claro-SP 13506-900, Brazil
| |
Collapse
|
14
|
Machado SM, Pacheco-Soares C, Marciano FR, Lobo AO, da Silva NS. Photodynamic therapy in the cattle protozoan Tritrichomonas foetus cultivated on superhydrophilic carbon nanotube. Materials Science and Engineering: C 2014; 36:180-6. [DOI: 10.1016/j.msec.2013.12.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 11/21/2013] [Accepted: 12/06/2013] [Indexed: 10/25/2022]
|
15
|
Moraes KCM, Monteiro CJ, Pacheco-Soares C. A novel function for CUGBP2 in controlling the pro-inflammatory stimulus in H9c2 cells: subcellular trafficking of messenger molecules. Cell Biol Int 2013; 37:1129-38. [PMID: 23661609 DOI: 10.1002/cbin.10127] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 03/04/2013] [Accepted: 05/02/2013] [Indexed: 01/13/2023]
Abstract
Accumulating evidence demonstrates that chronic inflammation plays an important role in heart hypertrophy and cardiac diseases. However, the fine-tuning of cellular and molecular mechanisms that connect inflammatory process and cardiac diseases is still under investigation. Many reports have demonstrated that the overexpression of the cyclooxygenase-2 (COX-2), a key enzyme in the conversion of arachidonic acid to prostaglandins and other prostanoids, is correlated with inflammatory processes. Increased level of prostaglandin E2 was also found in animal model of left ventricle of hypertrophy. Based on previous observations that demonstrated a regulatory loop between COX-2 and the RNA-binding protein CUGBP2, we studied cellular and molecular mechanisms of a pro-inflammatory stimulus in a cardiac cell to verify if the above two molecules could be correlated with the inflammatory process in the heart. A cellular model of investigation was established and H9c2 was used. We also demonstrated a regulatory connection between COX-2 and CUGBP2 in the cardiac cells. Based on a set of different assays including gene silencing and fluorescence microscopy, we describe a novel function for the RNA-binding protein CUGBP2 in controlling the pro-inflammatory stimulus: subcellular trafficking of messenger molecules to specific cytoplasmic stress granules to maintain homeostasis.
Collapse
Affiliation(s)
- Karen C M Moraes
- Departamento de Biologia, Instituto de Biociências, Universidade Estadual Paulista, Rio Claro, SP, Brazil.
| | | | | |
Collapse
|
16
|
Lobo A, Corat M, Antunes E, Ramos S, Pacheco-Soares C, Corat E. Cytocompatibility studies of vertically-aligned multi-walled carbon nanotubes: Raw material and functionalized by oxygen plasma. Materials Science and Engineering: C 2012. [DOI: 10.1016/j.msec.2010.08.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
17
|
Marsi TCO, Santos TG, Pacheco-Soares C, Corat EJ, Marciano FR, Lobo AO. Biomineralization of superhydrophilic vertically aligned carbon nanotubes. Langmuir 2012; 28:4413-4424. [PMID: 22320358 DOI: 10.1021/la300111k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Vertically aligned carbon nanotubes (VACNT) promise a great role for the study of tissue regeneration. In this paper, we introduce a new biomimetic mineralization routine employing superhydrophilic VACNT films as highly stable template materials. The biomineralization was obtained after VACNT soaking in simulated body fluid solution. Detailed structural analysis reveals that the polycrystalline biological apatites formed due to the -COOH terminations attached to VACNT tips after oxygen plasma etching. Our approach not only provides a novel route for nanostructured materials, but also suggests that COOH termination sites can play a significant role in biomimetic mineralization. These new nanocomposites are very promising as nanobiomaterials due to the excellent human osteoblast adhesion.
Collapse
Affiliation(s)
- Teresa Cristina O Marsi
- Laboratory of Biomedical Nanotechnology, University of Vale do Paraiba (Univap), São José dos Campos, SP, Brazil
| | | | | | | | | | | |
Collapse
|
18
|
Silva NSD, Machado SM, Filho FCES, Pacheco-Soares C. Basic biological aspects of Tritrichomonas foetus of re-levance to the treatment of bovines suffering of tricho-moniasis. ACTA ACUST UNITED AC 2011. [DOI: 10.4236/ojas.2011.13015] [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] [Indexed: 11/20/2022]
|
19
|
Lobo AO, Corat MAF, Ramos SC, Matsushima JT, Granato AEC, Pacheco-Soares C, Corat EJ. Fast preparation of hydroxyapatite/superhydrophilic vertically aligned multiwalled carbon nanotube composites for bioactive application. Langmuir 2010; 26:18308-18314. [PMID: 20961085 DOI: 10.1021/la1034646] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A method for the electrodeposition of hydroxyapatite films on superhydrophilic vertically aligned multiwalled carbon nanotubes is presented. The formation of a thin homogeneous film with high crystallinity was observed without any thermal treatment and with bioactivity properties that accelerate the in vitro biomineralization process and osteoblast adhesion.
Collapse
Affiliation(s)
- Anderson O Lobo
- Instituto Tecnologico de Aeronautica, Sao Jose dos Campos/SP, CEP: 12228-900, Brazil.
| | | | | | | | | | | | | |
Collapse
|
20
|
Pires-Oliveira DAA, Oliveira RF, Amadei SU, Pacheco-Soares C, Rocha RF. Laser 904 nm action on bone repair in rats with osteoporosis. Osteoporos Int 2010; 21:2109-14. [PMID: 20204601 DOI: 10.1007/s00198-010-1183-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Accepted: 12/17/2009] [Indexed: 10/19/2022]
Abstract
SUMMARY The aim of the present study was to determine the action of AsGA laser irradiation on bone repair in the tibia of osteopenic rats. The animals were randomly divided into eight experimental groups according to the presence of ovarian hormone (sham group) or the absence of the hormone (OVX group), as well as being irradiated or non-irradiated. Low-level 904-nm laser (50 mJ/cm(2)) accelerated the repair process of osteopenic fractures, especially in the initial phase of bone regeneration. INTRODUCTION The development of new techniques to speed the process of bone repair has provided significant advances in the treatment of fractures. Some attention recently focused on the effects of biostimulation on bone. METHODS Forty-eight adult rats were randomly divided into eight experimental groups (six animals in each group) according to the presence of ovarian hormone (sham group) or absence of the hormone (ovariectomized (OVX) group) as well as being irradiated or non-irradiated. For the application of low-level laser therapy, the animals were anesthetized with one third of the dose sufficient to immobilize the animal and irradiated with AsGa laser (904 nm, 50 mJ/cm(2) for 2 s, point form and in contact). The control animals received the same type of manipulation as the irradiated animals, but with the laser turned off. Half of the animals were killed 7 days following the confection of the bone defect, and the other half were killed 21 days after the surgery. After complete demineralization, the tibias were cut cross-sectionally in the central region of the bone defect and embedded in paraffin blocks. The blocks were then cut in semi-seriated slices and stained with hematoxylin and eosin. RESULTS There was new bone formation in the animals in the OVX group with laser treatment killed after 7 days (p < 0.001). The lowest percentage of bone formation was observed in the OVX without laser killed after 7 days (p > 0.05). All animals killed after 21 days exhibited linear closure of the lesion. CONCLUSION Low-level 904-nm laser (50 mJ/cm(2)) accelerated the repair process of osteopenic fractures, especially in the initial phase of bone regeneration.
Collapse
Affiliation(s)
- D A A Pires-Oliveira
- Programa de Pós Graduação-Unicastelo, Departamento Curso de Odontologia, Universidade Camilo Castelo Branco-Unicastelo São Paulo, Rua Carolina Fonseca 584, Itaquera, São Paulo, São Paulo, CEP-08.230-030, Brazil.
| | | | | | | | | |
Collapse
|
21
|
Abstract
OBJECTIVE The aim of the present study was to analyze the effects of photobiomodulation using a 904-nm diode laser at two energy densities (6 J/cm(2) and 50 mJ/cm(2)) on L929 fibroblast cells. BACKGROUND Low-power laser irradiation (LPLI) is a non-pharmacological resource that induces important in vitro photobiomodulation on cell cultures and tissues. METHODS Irradiation was performed for three days at 24-h intervals. After each interval, the cells were stained with MitoTracker Orange and DioC6 dyes to assess the photobiomodulatory effects of irradiation on mitochondrial activity and changes in the endoplasmic reticulum. The MTT assay [3-(4.5-dimethylthiazol-2-yl)-2.5 diphenyltetrazolium bromide] was used to evaluate cell proliferation. RESULTS AND CONCLUSIONS The fluorescence microscopy assessment of mitochondria and endoplasmic reticulum in cells irradiated with 6 J/cm(2) and 50 mJ/cm(2) demonstrated intense mitochondrial activity, which was confirmed by DioC6 staining. Reticular activity was observed stemming from increased protein synthesis. Photobiomodulation with 50 mJ/cm(2) was slightly higher than with 6 J/cm(2), as demonstrated by fluorescence microscopy results. Photobiomodulation was also time-dependent, with better results 72-h after irradiation.
Collapse
|
22
|
de Sant'Anna GR, dos Santos EAP, Soares LES, do Espírito Santo AM, Martin AA, Duarte DA, Pacheco-Soares C, Brugnera A. Dental enamel irradiated with infrared diode laser and photo-absorbing cream: part 2--EDX study. Photomed Laser Surg 2009; 27:771-82. [PMID: 19878028 PMCID: PMC2957072 DOI: 10.1089/pho.2008.2401] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [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: 11/13/2022] Open
Abstract
OBJECTIVE The effects of laser-induced compositional changes on the enamel were investigated by energy-dispersive X-ray fluorescence spectrometry (micro-EDX). After cariogenic challenge, we administered treatment of low-level infrared diode laser and a photo-absorbing cream (used to intensify the superficial light absorption). BACKGROUND DATA Dental caries is considered the most prevalent oral disease. A simple and noninvasive caries preventive regimen is treating tooth enamel with a laser, either alone or in combination with fluoride, which reduces enamel solubility and dissolution rates. High power lasers are still not widely used in private practice. Low-power near-infrared lasers may be an alternative approach. Energy-dispersive micro-EDX is a versatile and nondestructive spectroscopic technique that allows for a qualitative and quantitative elemental analysis of inorganic enamel components, such as calcium and phosphorus. MATERIALS AND METHODS Twenty-four extracted or exfoliated caries-free deciduous molars were divided into six groups: 1) control group (CTR-no treatment); 2) infrared laser treatment (L) (lambda = 810 nm, 100 mW/cm(2), 90 sec, 4.47 J/cm(2), 9 J); 3) infrared laser irradiation and photo-absorbing agent (CL); 4) photo-absorbing agent alone (C); 5) infrared laser irradiation and fluoridated photo-absorbing agent (FCL); and 6) fluoridated photo-absorbing agent alone (FC). Samples were analyzed using micro-EDX after two sets of treatments and pH cycling cariogenic challenges. RESULTS The CL group showed statistically significant increases in calcium and phosphorus (wt%) compared with the CTR group. The Ca/P ratio was similar in the FCL and CTR groups. There was a significant laser-induced reduction compared with the CTR group, and there was a possible modification of the organic balance content in enamel treated with laser and cream. CONCLUSION micro-EDX may be able to detect compositional changes in mineral phases of lased enamel under cariogenic challenge. Our results suggest that with a combined laser and photo-absorbing agent (CL) treatment, there was a possible disorganization of organic content in the tooth enamel with hydroxyapatite crystal reordering and reorganization.
Collapse
|
23
|
de Sant'anna GR, dos Santos EAP, Soares LES, do Espírito Santo AM, Martin AA, Duarte DA, Pacheco-Soares C, Brugnera A. Dental enamel irradiated with infrared diode laser and photoabsorbing cream: Part 1 -- FT-Raman Study. Photomed Laser Surg 2009; 27:499-507. [PMID: 19415988 PMCID: PMC2957074 DOI: 10.1089/pho.2008.2331] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [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: 11/13/2022] Open
Abstract
OBJECTIVE The aim of this FT-Raman study was to investigate laser-induced compositional changes in enamel after therapy with a low-level infrared diode laser and a photoabsorbing cream, in order to intensify the superficial light absorption before and after cariogenic challenge. BACKGROUND DATA Dental caries remains the most prevalent disease during childhood and adolescence. Preventive modalities include the use of fluoride, reduction of dietary cariogenic refined carbohydrates, plaque removal and oral hygiene techniques, and antimicrobial prescriptions. A relatively simple and noninvasive caries preventive regimen is treating tooth enamel with laser irradiation, either alone or in combination with topical fluoride treatment, resulting in reduced enamel solubility and dissolution rates. Due to their high cost, high-powered lasers are still not widely employed in private practice in developing countries. Thus, low-power red and near-infrared lasers appear to be an appealing alternative. MATERIALS AND METHODS Twenty-four extracted or exfoliated caries-free deciduous molars were divided into six groups: control group (no treatment; n = 8); infrared laser treatment (L; n = 8) (810 nm at 100 mW/cm(2) for 90 sec); infrared diode laser irradiation (810 nm at 100 mW/cm(2) for 90 sec) and photoabsorbing cream (IVL; n = 8); photoabsorbing cream alone (IV; n = 8); infrared diode laser irradiation (810 nm at 100 mW/cm(2) for 90 sec) and fluorinated photoabsorbing agent (IVLF; n = 8); and fluorinated photoabsorbing agent alone (IVF; n = 8). Samples were analyzed using FT-Raman spectroscopy before and after pH cycling cariogenic challenge. RESULTS There was a significant laser-induced reduction and possible modification of the organic matrix content in enamel treated with the low-level diode laser (the L, IVL, and IVFL groups). CONCLUSION The FT-Raman technique may be suitable for detecting compositional and structural changes occurring in mineral phases and organic phases of lased enamel under cariogenic challenge.
Collapse
Affiliation(s)
- Giselle Rodrigues de Sant'anna
- Vale do Paraíba University, UNIVAP, Research and Development Institute, IP&D, Laboratory of Biomedical Vibrational Spectroscopy, LEVB and Dental Laser Center, São José dos Campos, São Paulo, Brazil.
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Ricci R, Pazos MC, Borges RE, Pacheco-Soares C. Biomodulation with low-level laser radiation induces changes in endothelial cell actin filaments and cytoskeletal organization. J Photochem Photobiol B 2008; 95:6-8. [PMID: 19136277 DOI: 10.1016/j.jphotobiol.2008.11.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2007] [Revised: 07/04/2008] [Accepted: 11/26/2008] [Indexed: 01/13/2023]
Abstract
The cytoskeleton is a central and vital structure of eukaryotic cells. It consists of a dynamic network of partially interconnected polymers. This extended network controls the mechanical properties of animal cells, serves as intracellular transport "pathways", and plays a prominent role in cell motility, proliferation, and adhesion. In order to evaluate the action of laser irradiation on the cytoskeleton and proliferation of endothelial cells, rabbit aortic endothelial cells (RAEC) were irradiated with 685-nm low-level laser (20 mW output power). Fluorescent dye rhodamine-phalloidin staining was used to visualize the effect of laser irradiation on actin filaments. Irradiation with 8 J/cm(2) was performed four times at 12-h intervals for 24 min. Cells cultured under low fetal bovine serum condition (5% FBS) for 7 days presented actin staining predominantly in the cortical membrane region and a few actin filament stress fibers. However, the formation of stress fibers similar to those of control cells increased significantly in irradiated cells. It was concluded that laser irradiation induces changes in the cytoskeleton of endothelial cells through the reorganization of actin filaments and neo-formation of stress fibers, allowing evident cellular proliferation.
Collapse
Affiliation(s)
- R Ricci
- Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Laboratório de Dinâmica de Compartimentos Celulares, IP&D, UNIVAP, Av. Shishima Hifumi 2911, 12244-000, São José dos Campos, SP, Brazil
| | | | | | | |
Collapse
|
25
|
Lobo A, Antunes E, Machado A, Pacheco-Soares C, Trava-Airoldi V, Corat E. Cell viability and adhesion on as grown multi-wall carbon nanotube films. Materials Science and Engineering: C 2008. [DOI: 10.1016/j.msec.2007.01.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
26
|
Moreira LM, Vieira dos Santos F, Lyon JP, Maftoum-Costa M, Pacheco-Soares C, Soares da Silva N. Photodynamic Therapy: Porphyrins and Phthalocyanines as Photosensitizers. Aust J Chem 2008. [DOI: 10.1071/ch08145] [Citation(s) in RCA: 155] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The present work is focussed on the principles of photodynamic therapy (PDT), emphasizing the photochemical mechanisms of reactive oxygen species formation and the consequent biochemical processes generated by the action of reactive oxygen species on various biological macromolecules and organelles. This paper also presents some of the most used photosensitizers, including Photofrin, and the new prototypes of photosensitizers, analysing their physicochemical and spectroscopic properties. At this point, the review discusses the therapeutic window of absorption of specific wavelengths involving first- and second-generation photosensitizers, as well as the principal light sources used in PDT. Additionally, the aggregation process, which consists in a phenomenon common to several photosensitizers, is studied. J-aggregates and H-aggregates are discussed, along with their spectroscopic effects. Most photosensitizers have a significant hydrophobic character; thus, the study of the types of aggregation in aqueous solvent is very relevant. Important aspects of the coordination chemistry of metalloporphyrins and metallophthalocyanines used as photosensitizers are also discussed. The state-of-the-art in PDT is evaluated, discussing recent articles in this area. Furthermore, macrocyclic photosensitizers, such as porphyrins and phthalocyanines, are specifically described. The present review is an important contribution, because PDT is one of the most auspicious advances in the therapy against cancer and other non-malignant diseases.
Collapse
|
27
|
Tamietti BFP, Machado AHA, Maftoum-Costa M, Da Silva NS, Tedesco AC, Pacheco-Soares C. Analysis of Mitochondrial Activity Related to Cell Death after PDT with AlPCS4. Photomed Laser Surg 2007; 25:175-9. [PMID: 17603857 DOI: 10.1089/pho.2007.2040] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [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: 11/12/2022] Open
Abstract
OBJECTIVE The aim of this study was to report that photodynamic therapy (PDT) with mitochondria-associated chloroaluminum phthalocyanine tetrasulfonate (AlPcS(4)) leads to significant alterations in this organelle. BACKGROUND DATA PDT is a viable treatment modality for a variety of tumors, as well as for some non-oncologic diseases. The procedure submits cells or tissue to a photosensitizing drug followed by light irradiation of appropriate wavelength, usually in the red area or close to infrared, and compatible with the drug absorption spectrum, inducing the apoptotic process. However, the precise mechanism of PDT-induced apoptosis is not well characterized. Several cellular organelles can be postulated as the target for PDT with different photosensitizers such as plasmatic membrane, nucleus, mitochondria, endoplasmic reticulum, Golgi complex, and others. The mitochondrion is the main target in PDT because it is the main organelle involved in apoptosis. One of the main agents is cytochrome c, a proapoptotic factor that preferentially links itself to the mitochondrial cardiolipin. METHODS The photosensitizing effects of AlPcS(4) were studied in the mitochondria. Cells were irradiated with a diode laser (670 nm, energy density of 4.5 J/cm(2), and power density of 45 mW/cm(2)). RESULTS The fluorescent analyses of the mitochondria were performed with MitoTracker and nonyl acridine orange (NAO), and electron microscopy demonstrated that PDT with AlPcS(4) leads to significant alterations in mitochondria, causing membrane potential loss, alteration in cardiolipin distribution and cell death. CONCLUSION The labels with Mitotracker and NAO demonstrated mitochondrial migration to the perinuclear region, confirmed through electron microscopy, suggesting that intact mitochondria were solicited for possible DNA fragmentation.
Collapse
Affiliation(s)
- B F Perrin Tamietti
- Laboratório de Dinâmica de Compartimentos Celulares, Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, São José dos Campos, S.P., Brazil
| | | | | | | | | | | |
Collapse
|
28
|
da Silva NS, Ribeiro CDM, Machado AHA, Pacheco-Soares C. Ultrastructural changes in Tritrichomonas foetus after treatments with AlPcS4 and photodynamic therapy. Vet Parasitol 2007; 146:175-81. [PMID: 17399904 DOI: 10.1016/j.vetpar.2007.02.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [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: 09/11/2006] [Revised: 02/05/2007] [Accepted: 02/08/2007] [Indexed: 10/23/2022]
Abstract
The Tritrichomonas foetus is an amitochondrial parasitic protist which causes bovine trichomoniasis, a major sexually transmitted disease in cattle. No effective drugs for this disease have been approved to this date. Photodynamic therapy (PDT) is an experimental treatment that shows great potential for treating bacteria, fungi, yeasts, and viruses. However, the cytotoxic effect of PDT on protozoan has been poorly studied. In this study, PDT with aluminum phthalocyanine tetrasulfonated (AlPcS4) photosensitizer was efficient in killing T. foetus. The mode of cell death in T. foetus after PDT was investigated by transmission electron microscopy. Morphological changes, such as membrane projections, nucleus fragmentation with peripheral masses of heterochromatin, endoplasmic reticulum proliferation, intense cytoplasmic vacuolization, fragmented axostyle-pelta complex, and internalized flagella could be observed. This is the first report to demonstrate cell death in T. foetus after PDT, and thus will open up new lines of investigation to develop new treatments for bovine trichomoniasis.
Collapse
Affiliation(s)
- Newton Soares da Silva
- Laboratório de Biologia Celular e Tecidual, Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Av. Shishima Hifumi 2911, 12244-000 São José dos Campos, SP, Brasil.
| | | | | | | |
Collapse
|
29
|
Tamieti BP, Damatta RA, Cogo JC, Da Silva NS, Mittmann J, Pacheco-Soares C. Cytoskeleton, endoplasmic reticulum and nucleus alterations in CHO-K1 cell line after Crotalus durissus terrificus (South American rattlesnake) venom treatment. J Venom Anim Toxins Incl Trop Dis 2007. [DOI: 10.1590/s1678-91992007000100004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
30
|
Ferreira SDRM, Tedesco AC, Sousa G, Zângaro RA, Silva NS, Pacheco MTT, Pacheco-Soares C. Analysis of mitochondria, endoplasmic reticulum and actin filaments after PDT with AlPcS 4. Lasers Med Sci 2004; 18:207-12. [PMID: 15042425 DOI: 10.1007/s10103-003-0282-6] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [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: 09/10/2003] [Accepted: 10/28/2003] [Indexed: 11/30/2022]
Abstract
Photodynamic therapy (PDT) is a therapeutic modality for the treatment of tumors. This technique uses a visible light to activate a photosensitizer compounds, leading to a photo-oxidation process of biological tissue that can induce apoptosis or necrosis both in vivo and in vitro. However many of the cytotoxic effects remain an open question to be investigated. The cytotoxicity to specific cellular targets of classical photosensitizers used in the PDT in vitro has been analyzed in this work. The photosensitizing effects of Chloroaluminum Phthalocyanine Tetrasulfonate (AlPcS(4)) were studied on the mitochondria, cytoskeleton and endoplasmic reticulum of HeLa cells. The cells were irradiated with a diode laser (working at 670 nm; energy density of 4.5 J/cm(2 )and power density of 45 mW/cm(2)). The spectrofluorimetric analysis of the mitochondria showed changes in membrane potential. Cytoskeleton and endoplasmic reticulum showed basic alterations in distribution after PDT treatment, as an indicator of cellular death process.
Collapse
Affiliation(s)
- S D R M Ferreira
- Laboratory of Cellular and Tecidual Biology, Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Av. Shishima Hifumi 2911, 12244-000, São José dos Campos, SP, Brazil
| | | | | | | | | | | | | |
Collapse
|
31
|
Bortoletto R, Silva NS, Zângaro RA, Pacheco MTT, Da Matta RA, Pacheco-Soares C. Mitochondrial membrane potential after low-power laser irradiation. Lasers Med Sci 2004; 18:204-6. [PMID: 15042424 DOI: 10.1007/s10103-003-0281-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2003] [Accepted: 10/21/2003] [Indexed: 10/26/2022]
Abstract
We used the lipophilic cationic fluorescent dye 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethyl-benzimidazol-carbocyanine iodide (JC-1) to determine mitochondrial membrane potential (mdeltapsi) in Hep-2 cells after irradiation with low-power laser (lambda=635 nm). Through this methodology it was possible to analyze the variation on mitochondrial number and mdeltapsi, in cells irradiated for 100, 150 and 200 s with energy density of 100 mJ/cm(2). Our results show that JC-1 dye allows the identification of populations with different mitochondria morphology as well as the functionality of this organelle in the cells incubated for 1, 6 and 24 h, after irradiation with low-power laser.
Collapse
Affiliation(s)
- R Bortoletto
- Laboratório de Biologia Celular e Tecidual, Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Av. Shishima Hifumi 2911, 12244-000, São José dos Campos, S P, Brazil
| | | | | | | | | | | |
Collapse
|
32
|
de Castro Pazos M, Pacheco-Soares C, Soares da Silva N, DaMatta RA, Pacheco MTT. Ultrastructural effects of two phthalocyanines in CHO-K1 and HeLa cells after laser irradiation. BIOCELL 2003; 27:301-9. [PMID: 15002747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
The effects of Photodynamic Therapy using 2nd generation photosensitizers have been widely investigated aiming clinical application treatment of solid neoplasms. In this work, ultrastructure changes caused by the action of two 2nd generation photosensitizers and laser irradiation on CHO-K1 and HeLa (neoplastic) cells were analyzed by transmission electron microscopy. Aluminum phthalocyanine chloride, aluminum phthalocyanine tetrasulfonate chloride and radiation from a semiconductor laser at a fluency of 0.5 J/cm2 (Power=26 mW; lambda=.670 nm) were used. The results showed induction of apoptosis. Such alterations where observed in HeLa but not in CHO-K1 cells after Aluminum phthalocyanine tetrasulfonate chloride (AlPcS4, photodynamic treatment. The Aluminum phthalocyanine chloride (AlPc) photodynamic treatment induced necrosis on the neoplastic cell line, and cytoplasm and nuclear alterations on the normal cell line.
Collapse
Affiliation(s)
- Marcelo de Castro Pazos
- Laboratório de Biologia Celular e Tecidual, Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Av. Shishima Hifumi, 2911, CEP 12244-000, São José dos Campos, São Paulo, Brazil
| | | | | | | | | |
Collapse
|
33
|
de Castro Pazos M, Pacheco-Soares C, Soares da Silva N, DaMatta R, Pacheco M. Ultrastructural effects of two phthalocyanines in CHO-K1 and HeLa cells after laser irradiation. BIOCELL 2003. [DOI: 10.32604/biocell.2003.27.301] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
34
|
Pacheco-Soares C, de Souza W. Localization of saponin-sterol complexes and lectin-binding sites during interaction of Toxoplasma gondii with host cells. Parasitol Res 2000; 86:529-36. [PMID: 10935901 DOI: 10.1007/s004360000198] [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: 11/24/2022]
Abstract
The attachment of tachyzoites of Toxoplasma gondii to the surface of host cells induces the formation of a vacuole known as the parasitophorous vacuole (PV). In the present study we used lectins labeled with either fluorescein or colloidal gold particles to follow the fate of lectin-binding sites on the host-cell surface during the process of parasite/host-cell interaction. The results obtained indicate that few, if any, lectin-binding sites are internalized together with the tachyzoites to make part of the PV membrane. However, these sites are internalized and observed in small vesicles that are seen close to the PV. We also used the freeze-fracture technique in cells treated with saponin, which reveals cholesterol-containing sites as easily identifiable elongated sulculi and depressions. Intramembranous particles, which represent membrane integral proteins, were seen in the membrane lining the PV. However, saponin-cholesterol complexes were not observed in the membrane lining the PV, although they were seen in the parasite membranes. These observations, in association with data from previous studies, show that some, but not all, membrane components of the host cell contribute to the formation of the PV membrane.
Collapse
Affiliation(s)
- C Pacheco-Soares
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | | |
Collapse
|
35
|
Pacheco-Soares C, De Souza W. Labeled probes inserted in the macrophage membrane are transferred to the parasite surface and internalized during cell invasion by Toxoplasma gondii. Parasitol Res 2000; 86:11-7. [PMID: 10669130 DOI: 10.1007/pl00008500] [Citation(s) in RCA: 9] [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: 11/26/2022]
Abstract
Tachyzoites of Toxoplasma gondii attach to the macrophage surface and are internalized either by a phagocytic process, which can be inhibited by cytochalasin D, or by an active process, independent of host cell actin. Previous studies have shown that parasite attachment induces the secretion of macromolecules found in the apical organelles (micronemes and rhoptries) and subsequent/concomitant parasite internalization with the formation of a membrane-bound vacuole known as the parasitophorous vacuole. In the present study we labeled the macrophage surface with fluorescent probes that bind to proteins (DiIC16) and lipids (DTAF) and then allowed control or cytochalasin-D-treated cells to interact with untreated or antibody-coated tachyzoites of T. gondii. The interaction was interrupted at different time points by fixation and the distribution of the probes was analyzed by confocal laser scanning microscopy. Following attachment of the parasites to the macrophage surface, intense labeling of the parasite surface was observed, suggesting transfer of components of the macrophage surface to the parasite surface. Nonadherent parasites were not labeled. Immediately after attachment, most of the parasites were internalized and labeling of the internalized parasites as well as of the parasitophorous vacuole, probably of its membrane, was evident, indicating that surface components of the macrophage are involved in the formation of the parasitophorous vacuole.
Collapse
Affiliation(s)
- C Pacheco-Soares
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense, Rio de Janeiro, RJ, Brasil
| | | |
Collapse
|
36
|
Abstract
The initial association of tachyzoites of Toxoplasma gondii with a host cell induces an endocytic process which leads to the formation of a vacuole known as the parasitophorous vacuole (PV). We analyzed the parasite-host cell interaction process using either parasites or host cells whose membrane was previously labeled with probes specific for proteins, sialoglycoconjugates and lipids, and then allowed to interact for periods varying from 5 minutes to 24 hours. The fate of the fluorescents probes was followed by confocal laser scanning microscopy. In host cells previously labeled with PKH26, FITC-Thiosemicarbazide or DTAF, which label membrane proteins, siloglycoconjugates and lipids, respectively, a uniform labeling of the cell surface was observed before interaction. When allowed to interact with T. gondii, labeling for PKH26 and DTAF, but not for FITC-Thiosemicarbazide, was observed initially at the region of contact between the two cells and subsequently on the membrane lining the PV and the intravacuolar parasites. These observations show that some, but not all, membrane components contribute to the formation of the PV membrane. Previously labeled parasites attach to the host cell surface but lose the fluorescent probes during the invasion process so that no labeled parasites were seen within the PV. These observations point to the existence of a dynamic process of membrane-associated components of the parasite and host cell during the interaction process.
Collapse
Affiliation(s)
- C Pacheco-Soares
- Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual, Rio de Janeiro, Brasil
| | | |
Collapse
|