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INTRODUCTION: Cancer is the major cause of morbidity and mortality worldwide. Current treatments for both solid and hematological tumors are associated with severe adverse effects and drug resistance, necessitating the development of novel selective antineoplastic drugs. METHODS: The present study describes the antitumor activity of the imidazacridine derivative 5-acridin-9-ylmethylidene-2-thioxoimidazolidin-4-one (LPSF/AC05) in breast cancer, leuke-mia, and lymphoma cells. Cytotoxicity assays were performed in PBMC and in breast cancer, leukemia, and lymphoma cell lines using the MTT method. Changes in cell cycle progression and apoptosis were assessed using flow cytometry. Moreover, topoisomerase II inhibition as-says were performed. LPSF/AC05 exhibited cytotoxicity in six of the nine cell lines tested. RESULTS: The best results for leukemia and lymphoma were observed in the Toledo, Jurkat, and Raji cell lines (IC50 = 27.18, 31.04, and 33.36 ïM, respectively). For breast cancer, the best re-sults were observed in the triple-negative cell line MDA-MB-231 (IC50 = 27.54 µM). The compound showed excellent selectivity, with no toxicity to normal human cells (IC50 > 100ïM; selectivity index > 3). Cell death was primarily induced by apoptosis in all cell lines. Furthermore, LPSF/AC05 treatmentinduced cell cycle arrest at the G0/G1 phase in leuke-mia/lymphoma and at the G2/M phase in breast cancer. CONCLUSION: Finally, topoisomerase II was inhibited. These results indicate the potential ap-plication of LPSF/AC05 in cancer therapy.
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Melanoma, an infrequent yet significant variant of skin cancer, emerges as a primary cause of brain metastasis among various malignancies. Despite recognizing the involvement of inflammatory molecules, particularly chemokines, in shaping the metastatic microenvironment, the intricate cellular signaling mechanisms underlying cerebral metastasis remain elusive. In our pursuit to unravel the role of cytokines in melanoma metastasis, we devised a protocol utilizing mixed cerebral cortical cells and SK-MEL-28 melanoma cell lines. Contrary to expectations, we observed no discernible morphological change in melanoma cells exposed to a cerebral conditioned medium (CM). However, a substantial increase in both migration and proliferation was quantitatively noted. Profiling the chemokine secretion by melanoma in response to the cerebral CM unveiled the pivotal role of interferon gamma-induced protein 10 (CXCL10), inhibiting the secretion of interleukin 8 (CXCL8). Furthermore, through a transwell assay, we demonstrated that knockdown CXCL10 led to a significant decrease in the migration of the SK-MEL-28 cell line. In conclusion, our findings suggest that a cerebral CM induces melanoma cell migration, while modulating the secretion of CXCL10 and CXCL8 in the context of brain metastases. These insights advance our understanding of the underlying mechanisms in melanoma cerebral metastasis, paving the way for further exploration and targeted therapeutic interventions.
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Movimiento Celular , Quimiocina CXCL10 , Melanoma , Transducción de Señal , Quimiocina CXCL10/metabolismo , Quimiocina CXCL10/genética , Humanos , Medios de Cultivo Condicionados/farmacología , Melanoma/patología , Melanoma/metabolismo , Línea Celular Tumoral , Interleucina-8/metabolismo , Neoplasias Encefálicas/metabolismo , Neoplasias Encefálicas/patología , Neoplasias Encefálicas/secundario , Invasividad Neoplásica , Proliferación Celular , Corteza Cerebral/metabolismo , Corteza Cerebral/patologíaRESUMEN
BACKGROUND: Inflammation is a series of complex defense-related reactions. The inflammation cascade produces various pro-inflammatory mediators. Unregulated production of these pro-inflammatory mediators can lead to a wide range of diseases, including rheumatoid arthritis, sepsis, and inflammatory bowel disease. In the literature, the anti-inflammatory action of quinoline and thiazolidinedione nuclei are well established, alone, and associated with other nuclei. The synthesis of hybrid molecules is a strategy for obtaining more efficient molecules due to the union of pharmacophoric nuclei known to be related to pharmacological activity. OBJECTIVES: Based on this, this work presents the synthesis of thiazolidinedione-quinoline molecular hybrids and their involvement in the modulation of cytokines involved in the inflammatory reaction cascade. METHODS: After synthesis and characterization, the compounds were submitted to cell viability test (MTT), ELISA IFN-γ and TNF-α, adipogenic differentiation, and molecular docking assay with PPARy and COX-2 targets. RESULTS: LPSF/ZKD2 and LPSF/ZKD7 showed a significant decrease in the concentration of IFN- γ and TNF-α, with a dose-dependent behavior. LPSF/ZKD4 at a concentration of 50 µM significantly reduced IL-6 expression. LPSF/ZKD4 demonstrates lipid accumulation with significant differences between the untreated and negative control groups, indicating a relevant agonist action on the PPARγ receptor. Molecular docking showed that all synthesized compounds have good affinity with PPARγ e COX-2, with binding energy close to -10,000 Kcal/mol. CONCLUSION: These results demonstrate that the synthesis of quinoline-thiazolidinedione hybrids may be a useful strategy for obtaining promising candidates for new anti-inflammatory agents.
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Simulación del Acoplamiento Molecular , Quinolinas , Tiazolidinedionas , Quinolinas/farmacología , Quinolinas/química , Quinolinas/síntesis química , Tiazolidinedionas/farmacología , Tiazolidinedionas/síntesis química , Tiazolidinedionas/química , Estructura Molecular , Humanos , Supervivencia Celular/efectos de los fármacos , Relación Estructura-Actividad , Animales , PPAR gamma/agonistas , PPAR gamma/metabolismo , Relación Dosis-Respuesta a Droga , Ratones , Antiinflamatorios no Esteroideos/farmacología , Antiinflamatorios no Esteroideos/síntesis química , Antiinflamatorios no Esteroideos/química , Ciclooxigenasa 2/metabolismo , Antiinflamatorios/farmacología , Antiinflamatorios/síntesis química , Antiinflamatorios/química , Factor de Necrosis Tumoral alfa/metabolismoRESUMEN
SARS-CoV-2 virus emerged as a new threat to humans and spread around the world, leaving a large death toll. As of January 2023, Brazil is among the countries with the highest number of registered deaths. Nonpharmacological and pharmacological interventions have been heterogeneously implemented in the country, which, associated with large socioeconomic differences between the country regions, has led to distinct virus spread dynamics. Here, we investigate the spatiotemporal dispersion of SARS-CoV-2 lineages in the Pernambuco state (Northeast Brazil) throughout the distinct epidemiological scenarios that unfolded in the first 2 years of the pandemic. We generated a total of 1,389 new SARS-CoV-2 genomes from June 2020 to August 2021. This sampling captured the arrival, communitary transmission, and the circulation of the B1.1, B.1.1.28, and B.1.1.33 lineages; the emergence of the former variant of interest P.2; and the emergence and fast replacement of all previous variants by the more transmissible variant of concern P.1 (Gamma). Based on the incidence and lineage spread pattern, we observed an East-to-West to inner state pattern of transmission, which is in agreement with the transmission of more populous metropolitan areas to medium- and small-size country-side cities in the state. Such transmission patterns may be partially explained by the main routes of traffic across municipalities in the state. Our results highlight that the fine-grained intrastate analysis of lineages and incidence spread can provide actionable insights for planning future nonpharmacological intervention for air-borne transmissible human pathogens.IMPORTANCEDuring the COVID-19 pandemic, Brazil was one of the most affected countries, mainly due its continental-size, socioeconomic differences among regions, and heterogeneous implementation of intervention methods. In order to investigate SARS-CoV-2 dynamics in the state of Pernambuco, we conducted a spatiotemporal dispersion study, covering the period from June 2020 to August 2021, to comprehend the dynamics of viral transmission during the first 2 years of the pandemic. Throughout this study, we were able to track three significant epidemiological waves of transmission caused by B1.1, B.1.1.28, B.1.1.33, P.2, and P.1 lineages. These analyses provided valuable insights into the evolution of the epidemiological landscape, contributing to a deeper understanding of the dynamics of virus transmission during the early years of the pandemic in the state of Pernambuco.
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COVID-19 , SARS-CoV-2 , COVID-19/transmisión , COVID-19/epidemiología , COVID-19/virología , Humanos , Brasil/epidemiología , SARS-CoV-2/genética , SARS-CoV-2/clasificación , Análisis Espacio-Temporal , Genoma Viral , Filogenia , PandemiasRESUMEN
Com a pandemia da COVID-19, uma grande quantidade dos profissionais da saúde adoeceu e se afastou do trabalho. Este estudo objetivou estimar o custo desses afastamentos em um hospital público brasileiro e ajudou a identificar as falhas nos processos de trabalho que levaram ao absenteísmo. É uma avaliação econômica parcial, descritiva, retrospectiva, quantitativa, com dados coletados de prontuários médicos, sobre os custos diretos dos afastamentos. A amostra foi de 793 servidores e 2.166 registros de atestados médicos, de março a dezembro de 2020. Observou-se que: o custo total dos afastamentos foi de R$ 2.603.017,95. As doenças virais representaram o maior custo, seguidas dos problemas relacionados à saúde mental. Os técnicos de enfermagem foram os profissionais que causaram o maior impacto nos afastamentos (27,21%). Portanto, a pesquisa gerou indicadores importantes para nortear os gestores na alocação de recursos e na tomada de decisões durante a pandemia da COVID-19.
With the COVID-19 pandemic, a large number of healthcare professionals became ill and were away from work. This study aimed to estimate the cost of these absences in a Brazilian public hospital and helped to identify the flaws in work processes that led to absenteeism. It is a partial, descriptive, retrospective, quantitative economic evaluation, with data collected from medical records, on the direct costs of sick leave. The sample consisted of 793 employees and 2.166 medical certificate records, from March to December 2020. It was observed that: the total cost of leaves was R$ 2.603.017,95. Viral diseases represented the highest cost, followed by problems related to mental health. Nursing technicians were the professionals who caused the greatest impact on sick leave (27.21%). Therefore, the research generated important indicators to guide managers in resource allocation and decision-making during the COVID-19 pandemic.
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Procesos Patológicos , Absentismo , Economía y Organizaciones para la Atención de la Salud , COVID-19RESUMEN
Resumo Fundamento A oncostatina M (OSM) é uma citocina pleiotrópica que, após lesão arterial, demonstra ser expressa rapidamente. Objetivos Correlacionar os níveis séricos da OSM, do receptor solúvel de oncostatina M (sOSMR) e da fração solúvel de glicoproteína 130 (sgp130) em pacientes com doença arterial coronariana (DAC) a parâmetros clínicos. Métodos Os níveis de sOSMR e sgp130 foram avaliados por ELISA, enquanto os de OSM foram avaliados por Western Blot, em pacientes com SCC (n=100), pacientes com SCA (n=70) e 64 voluntários do grupo de controle sem manifestações clínicas da doença. Valores de p <0,05 foram considerados estatisticamente significativos. Resultados Pacientes com DAC exibiram níveis significativamente mais baixos de sOSMR e sgp130 e níveis mais altos de OSM em comparação ao grupo de controle (ambos p <0,0001). A análise clínica mostrou níveis mais baixos de sOSMR em homens ([OR] = 2,05, p = 0,026), jovens (OR = 1,68, p = 0,0272), hipertensos (OR = 2,19, p = 0,041), fumantes (OR = 2,19, p = 0,017), pacientes que não apresentavam dislipidemia (OR = 2,32, p = 0,013), pacientes com infarto agudo do miocárdio [IAM] (OR = 3,01, p = 0,001) e pacientes não tratados com estatina (OR = 1,95, p = 0,031), antiplaquetário (OR = 2,46, p = 0,005), inibidores dos canais de cálcio (OR = 3,15, p = 0,028) e antidiabéticos (OR = 2,97, p = 0,005). Os níveis de sOSMR também foram correlacionados a sexo, idade, hipertensão e uso de medicamentos na análise multivariada. Conclusões Nossos dados sugerem que o aumento dos níveis séricos de OSM e a diminuição dos níveis de sOSMR e sGP130 em pacientes com injúria cardíaca podem desempenhar um papel importante no mecanismo fisiopatológico da doença. Além disso, níveis mais baixos de sOSMR foram associados a sexo, idade, hipertensão e uso de medicamentos.
Abstract Background Oncostatin M (OSM) is a pleiotropic cytokine which, after arterial injury, has proven to be to be rapidly expressed. Objectives To correlate the serum levels of OSM, soluble OSM receptor (sOSMR), and soluble fraction of glycoprotein 130 (sgp130) in patients with coronary artery disease (CAD) with clinical parameters. Methods Levels of sOSMR and sgp130 were evaluated by ELISA and OSM by Western Blot, in patients with CCS (n=100), patients with ACS (n=70), and 64 control volunteers without clinical manifestations of the disease. P-values < 0.05 were considered to be statistically significant. Results CAD patients exhibited significantly lower levels of sOSMR and sgp130 and higher levels of OSM when compared to the controls (both p < 0.0001). Clinical analysis displayed, lower levels of sOSMR in men ([OR] = 2.05, p = 0.026), youth (OR = 1.68, p = 0.0272), hypertensives (OR = 2.19, p = 0.041), smokers (OR = 2.19, p = 0.017), patients that did not present dyslipidemia (OR = 2.32, p = 0.013), patients with Acute Myocardial Infarction [AMI] (OR = 3.01, p = 0.001) and patients not treated with statin (OR = 1.95, p = 0.031), antiplatelet agent (OR = 2.46, p = 0.005), inhibitors of calcium channels (OR = 3.15, p = 0.028), and antidiabetic drugs (OR = 2.97, p = 0.005). The levels of sOSMR were also correlated with gender, age, hypertension, and use of medications in multivariate analysis. Conclusions Our data suggest that the enhanced serum levels of OSM, and decreased levels of sOSMR and sGP130 in patients with cardiac injury may play an important role in the pathophysiological mechanism of the disease. Furthermore, lower levels of sOSMR were associated with gender, age, hypertension, and the use of medications.
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Abstract Biopharmaceuticals, mainly monoclonal antibodies, and fusion proteins are drugs that have gained notoriety in the treatment of various chronic and inflammatory diseases and have high prices. The study aimed to verify which monoclonal antibodies and fusion proteins were most incorporated into the Unified Health System (SUS), which therapeutic indication most benefited from them and to analyze public spending on these biopharmaceuticals from January 2012 to September 2019. This study performed a qualitative and quantitative analysis of biopharmaceuticals incorporated by SUS. The data were collected on the websites of CONITEC and the Health Price Bank. The results demonstrated that subcutaneous adalimumab was most frequently incorporated, and the most requested therapeutic indication was rheumatoid arthritis. Public spending on biopharmaceuticals exceeded R$ 28 billion (more than US$ 140 billion). However, a downward trend was confirmed (-266.7%) in the period evaluated. Despite the increase in demand and public spending on biologics in general, in Brazil and worldwide, the results of this research show that there was a drop in public spending on the biopharmaceuticals studied in the last seven years.
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Biofarmacia/clasificación , Sistema Único de Salud , Productos Biológicos/análisis , Brasil/etnología , Tecnología Biomédica/organización & administración , Gastos Públicos/estadística & datos numéricos , Banco de Precios en Salud/estadística & datos numéricosRESUMEN
Abstract Osteoarthritis (OA) encompasses degeneration of articular cartilage, subchondral bone erosions and sclerosis. Chondrocyte apoptosis and an oxygen-deprived microenvironment are essential factors in OA pathogenesis. PAR-4 (Prostate apoptosis response-4) is a pro-apoptotic protein implicated in many pathologies as well as in chondrocyte cell death mechanism. Vitamin D supplementation has been identified as a therapeutic tool for a variety of inflammatory pathologies. In the present manuscript, we investigated whether first, PAR-4 expression is influenced by chondrocytes in a model of OA, in vitro, and second, whether vitamin D modulates PAR-4 expression in the same model. To test our hypothesis, we used the primary culture of murine chondrocytes isolated from the femoral and tibial condyles of wistar rats. The expression of the pro-inflammatory effect interleukin IL-1β was evaluated in the presence and absence of vitamin D. Western blot and immunofluorescence analysis confirmed protein expression. In the normoxia condition, the chondrocytes expressed PAR-4 in the cell nucleus, and in the hypoxic condition, PAR-4 was expressed in the cell cytoplasm. We disclosed that the treatment with Vitamin D decreased PAR-4 (p= 0.0137) and caspase-3 (p= 0.0007) expression. Thus, the results suggested that PAR-4 and caspase-3 proteins could be potential targets for OA.However, we believe that research is needed to identify the mechanisms implicated in the regulation of PAR-4 in OA.
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RESUMO As tecnologias em saúde têm revolucionado a assistência médica e a gestão em saúde. A Comissão Nacional de Incorporação de Tecnologias no SUS (Conitec) é o órgão do Ministério da Saúde que assessora na incorporação, exclusão ou alteração de novas tecnologias no Sistema Único de Saúde (SUS). O presente estudo objetivou descrever o perfil das tecnologias incorporadas no SUS de 1 de janeiro de 2012 a 30 de setembro de 2019. Os dados foram coletados no site da Conitec. Na análise estatística, foi utilizado o teste Qui-quadrado de Pearson e o Teste Exato de Fisher. Os resultados demonstram que foram incorporadas 380 tecnologias, prevalecendo os medicamentos (46,6%). Em relação aos demandantes, os de origem interna superaram os demais (82,4%), principalmente secretarias do Ministério da Saúde (p<0,001). As Doenças Infecciosas e Parasitárias (DIPs) foram as mais beneficiadas (20,3%), com destaque para o HIV (Vírus da Imunodeficiência Humana). A maioria das tecnologias incorporadas passou por consulta pública (p<0,001). Conclui-se que o perfil das tecnologias incorporadas são principalmente medicamentos, por demanda interna, com indicação para DIPs e, sobretudo para o HIV. Os medicamentos continuam sendo o foco das solicitações e as demandas internas passaram a ter mais espaço nesse cenário.
ABSTRACT Health technologies have revolutionized medical care and health management. The National Commission for the Incorporation of Technologies in the SUS (Conitec) is the Ministry of Health's body that advises on the incorporation, exclusion or alteration of new technologies in the Unified Health System (SUS). This study aimed to describe the profile of technologies incorporated in the SUS between January 1, 2012 and September 30, 2019. Data were collected on the Conitec website. Statistical analysis used Pearson's chi-square test and Fisher's exact test. The results show that 380 technologies were incorporated, with medication prevailing (46.6%). In relation to the plaintiffs, those of internal origin surpassed the others (82.4%), mainly secretariats of the Ministry of Health (p<0.001). Infectious and Parasitic Diseases (PIDs) were the most benefited (20.3%), with emphasis on HIV (Human Immunodeficiency Virus). Most of the incorporated technologies underwent public consultation (p<0.001). It is concluded that the profile of the incorporated technologies are mainly medicines, by internal demand, with indication for PIDs and, above all, for HIV. Medicines continue to be the focus of requests and internal demands have gained more space in this scenario.
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Abstract INTRODUCTION Herein, the authors describe a simple enhancement to a commercial rapid DNA extraction kit based on simple viral lysis for detecting COVID-19 via RT-qPCR. METHODS After testing several different modifications, the adapted protocol with the best results in preliminary experiments was statistically evaluated in comparison with an automated robotic protocol. RESULTS Processing and testing of 119 nasopharyngeal samples ultimately yielded near-perfect agreement with the automated protocol (κ = 0.981 [95% confidence interval 0.943-1.000]). CONCLUSIONS The low cost and rapidity of the enhanced protocol makes it suitable for adoption in laboratories diagnosing COVID-19, especially those with high demand for examinations.
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Humanos , SARS-CoV-2 , COVID-19 , ADN , ARN Viral , Sensibilidad y EspecificidadRESUMEN
Allergic asthma is a chronic, complex inflammatory disease of the airway. Despite extensive studies on the immunomodulation of T helper (Th) cell pathways (i.e., Th1 and Th2) in asthma, little is known about the effects of Th17 pathway modulation, particularly that involving peroxisome proliferator-activated receptors (PPARs). In response, two new thiazolidinedione derivatives-namely, LPSF-GQ-147 and LPSF-CR-35 were synthesized and evaluated for their immunomodulatory effects on Th17-related cytokines, including interferon γ (IFNγ), interleukin IL-6, IL-17, and IL-22 in the peripheral blood mononuclear cells of asthmatic children. Both compounds were nontoxic even at high concentrations (i.e., 100 µM). The LPSF-CR-35 compound significantly reduced the levels of IL-17A (p = .039) and IFNγ (p = .032) at 10 µM. For IL-22 and IL-6, significant reduction occurred at 100 µM (p = .039 and p = .02, respectively). Conversely, LPSF-GQ-147 did not significantly inhibit the production of the tested cytokines, the levels of all of which were more efficiently reduced by LPSF-CR-35 than methylprednisolone, the standard compound. Real-time polymerase chain reaction assay confirmed that LPSF-GQ-147 has significant PPARγ modulatory activity. Such data indicate that both LPSF-CR-35 and LPSF-GQ-147 are promising candidates as drugs for treating inflammation and asthma
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Animales , Masculino , Ratas , Asma/complicaciones , Niño , Tiazolidinedionas/análisis , Citocinas/efectos adversos , Células Th17RESUMEN
O câncer de mama é o tumor mais incidente entre as mulheres no mundo. Assim como em outros tumores, a tumorigênese nas mamas é um processo complexo resultante da combinação de fatores genéticos e ambientais que dirigem a transformação das células normais em células malignas. O gene PAWR, conhecido como PAR-4 (Prostatic apoptosis response-4) foi primeiramente identificado em células de câncer de próstata de rato induzidas a apoptose e codifica uma proteína de 342 aminoácidos que é efetiva na indução de apoptose nas células tumorais e causa regressão dos tumores ativando Fas/FasL e inibindo a atividade de NF-B. O aumento de Par-4 é suficiente para causar apoptose seletiva em células tumorais, mas não em células normais ou imortalizadas. Recentemente, um estudo de nosso grupo demonstrou que a expressão reduzida de Par-4 está associada a um pior prognóstico em câncer de mama e que esta proteína pode ter um papel importante na morfogênese da glândula mamária. O estudo funcional do gene Par-4 em diferentes linhagens de mama é importante para o melhor entendimento do papel deste gene no processo tumorigênico da glândula mamária. Portanto, a proposta do presente estudo foi investigar os efeitos do aumento de expressão ou supressão de Par-4 na proliferação celular e sobrevivência das células normais e tumorais de mama. As células MCF10A e MCF-7 foram transfectadas com os vetores de expressão para Par-4 (pCMV6-PAR-4) ou com oligos siRNA para supressão transiente de Par-4. A caracterização dos clones foi feita por Real Time PCR e Western Blot. Os ensaios de proliferação foram feitos por MTT e os ensaios de apoptose por dupla marcação com Laranja de Acridina/ Hoechst 33342 e por citometria de fluxo. O aumento da expressão de Par-4 diminuiu a proliferação de ambas às células comparadas às células-controle (p<0,01). Por outro lado, a diminuição de expressão de Par-4 por siRNA levou ao aumento da proliferação das células tumorais MCF-7 (p<0,01)...
Breast cancer is the most common tumor among women in the world. As for other malignancies the tumorigenic process of the breast involves genetic alterations that drive the progressive transformation of normal cells into malignant cells with and aggressive phenotype. Alterations in cells that upregulate proliferation or downregulate apoptosis are one of essential mechanisms that dictate tumor growth. The PAWR gene, also known as PAR-4 (Prostatic apoptosis response-4), was first identified in prostate cancer cells undergoing apoptosis and encodes a 332 aminoacid protein that is effective in inducing cancer cell apoptosis and cause regression of tumors by activating Fas/FasL and inhibiting NF-B activity. Interestingly, Par-4 overexpression is sufficient to cause apoptosis in cancer cells, but not in normal or immortalized cells. Recently, we demonstrated that reduced expression of PAR-4 is associated with breast cancer poor prognosis and this protein may have a role in the process of the mammary gland morphogenesis. The functional study of Par-4 gene in different cell lines of breast is important to better understand its role in the tumorigenic process of the breast. Therefore, the purpose of the present study was to investigate the effects of overexpression and suppression of PAR-4 in cell proliferation and survival in mammary epithelial cells. MCF10A and MCF-7 cells were transfected with expression vectors for PAR-4 overexpression (pCMV6-PAR-4) or with small interfering RNAs duplexed oligonucleotides. Clone characterization was performed using real time PCR and western blot. Proliferation assays were carried out using MTT and apoptotic assays were performed by doublefluorescence staining technique (Acridine Orange/Hoechst 33342) or using flow cytometry. PAR-4 overexpression decreased the proliferation rates in both MCF10A and MCF-7 cells compared to the parental or control cells (p<0,01)...