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Introduction: Natural killer 92 (NK-92) cells are an attractive therapeutic approach as alternative chimeric antigen receptor (CAR) carriers, different from T cells, once they can be used in the allogeneic setting. The modest in vivo outcomes observed with NK-92 cells continue to present hurdles in successfully translating NK-92 cell therapies into clinical applications. Adoptive transfer of CAR-NK-92 cells holds out the promise of therapeutic benefit at a lower rate of adverse events due to the absence of GvHD and cytokine release syndrome. However, it has not achieved breakthrough clinical results yet, and further improvement of CAR-NK-92 cells is necessary. Methods: In this study, we conducted a comparative analysis between CD19-targeted CAR (CAR.19) co-expressing IL-15 (CAR.19-IL15) with IL-15/IL-15Rα (CAR.19-IL15/IL15Rα) to promote NK cell proliferation, activation, and cytotoxic activity against B-cell leukemia. CAR constructs were cloned into lentiviral vector and transduced into NK-92 cell line. Potency of CAR-NK cells were assessed against CD19-expressing cell lines NALM-6 or Raji in vitro and in vivo in a murine model. Tumor burden was measured by bioluminescence. Results: We demonstrated that a fourth- generation CD19-targeted CAR (CAR.19) co-expressing IL-15 linked to its receptor IL-15/IL-15Rα (CAR.19-IL-15/IL-15Rα) significantly enhanced NK-92 cell proliferation, proinflammatory cytokine secretion, and cytotoxic activity against B-cell cancer cell lines in vitro and in a xenograft mouse model. Conclusion: Together with the results of the systematic analysis of the transcriptome of activated NK-92 CAR variants, this supports the notion that IL-15/IL-15Rα comprising fourth-generation CARs may overcome the limitations of NK-92 cell-based targeted tumor therapies in vivo by providing the necessary growth and activation signals.

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Members of the Bcl-2 family are proteins that play an essential role in the regulation of apoptosis, a crucial process in development and normal physiology in multicellular organisms. The essential mechanism of this family of proteins is given by the role of pro-survival proteins, which inhibit apoptosis by their direct binding with their counterpart, the effector proteins of apoptosis. This family of proteins was named after the typical member Bcl-2, which was named for its discovery and abnormal expression in B-cell lymphomas. Subsequently, the structure of one of its members BCL-xL was described, which allowed one to understand much of the molecular mechanism of this family. Due to its role of BCL-xL in the regulation of cell survival and proliferation, it has been of great interest in its study. Due to this, it is important to research its role regarding the development and progression of human malignancies, especially in hematologic malignancies. Due to its variation in expression in cancer, it has been suggested that BCL-xL can or cannot play a role in cancer depending on the cellular or tissue context. This review discusses recent advances in its transcriptional regulation of BCL-xL, as well as the advances regarding the activities of BCL-xL in hematological malignancies, its possible role as a biomarker, and its possible clinical relevance in these malignancies.

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Com o objetivo de contribuir para a gestão do Sistema único de Saúde (SUS) no que se refere às neoplasias hematológicas (NH), este trabalho apresenta a elaboração de dois estudos: (a) analise de custos por hospitalização por NH, e (b) avaliação de custo-efetividade da adição de daratumumabe ao esquema de tratamento do Mieloma Múltiplo (MM) em pacientes não elegíveis para transplante autológico de células tronco hematopoiéticas (TCTH). Por meio da extração de dados do sistema de internações hospitalares do SUS, desenvolveu-se uma análise retrospectiva descritiva de frequências e custos das internações por NH de acordo com sua distribuição temporal, espacial (por estados e regiões), e por patologia, na década compreendida entre os anos de 2010 e 2019. Foram também calculados custo médio pro procedimento e taxa de acesso. Foi observado que houve uma tendência de crescimento estável das frequências e dos custos ao longo do período analisado. Além disso, contatou-se uma significativa discrepância na frequência dos procedimentos entre as regiões Norte e Sudeste, que registraram o menor e o maior número de procedimentos, respectivamente. Observou-se também eu a frequência das internações por patologia não refletiu a incidência estimada pela literatura no país para cada uma das patologias avaliadas. Para o estudo de custo-efetividade, foi desenvolvido um modelo de simulação de sobrevida particionado para a adição do daratumumabe ao esquema de tratamento composto por bortezomibe, melfalano e prednisona (VMP). O horizonte temporal de 30 anos e a perspectiva de análise do SUS, foram usados. Com base nos dados da literatura foi possível observar que a adição deste medicamento ao VMP no tratamento desses pacientes pode aumentar a sobrevida global e a sobrevida livre de progressão. Considerados os custos relacionados a esta tecnologia e ao manejo do paciente no cenário brasileiro, no entanto, a inclusão do daratumumabe está aparentemente acima do limiar de aceitabilidade adotado pelo SUS. Para que esta estratégia seja custo-efetiva no cenário observado, a tecnologia precisaria sofrer uma redução de quase 50% no custo. O estudo, portanto, não recomenda a adição do daratumumabe ao VMP no tratamento do MM em pacientes não elegíveis para TCTH.

Aiming to contribute to the management of the Brazilian Public Health System (SUS) regarding hematologic malignances (NH), this work presents the development of two studies: (a) cost analysis per hospitalization for NH, and (b) cost-effectiveness evaluation of adding daratumumab to the treatment scheme for Multiple Myeloma (MM) in patients not eligible for autologous hematopoietic stem cell transplantation (TCTH). By extracting data from the SUS hospital admissions system, we developed a retrospective descriptive analysis of frequencies and costs of NH admissions according to their temporal, spatial distribution (by states and regions), and by pathology, in the decade between the years 2010 and 2019. Average cost per procedure and access rate were also estimated. It was observed that there was a stable growth trend in frequencies and costs over the analyzed period. Furthermore, a significant discrepancy in the procedure frequency was found between the North and Southeast regions, which recorded the lowest and highest number of procedures, respectively. It was also observed that the frequency of hospitalizations per pathology did not reflect the incidence estimated by the literature in the country for each of the pathologies evaluated. For the cost-effectiveness study, a partitioned survival simulation model was developed for the inclusion of daratumumab in the treatment scheme consisting of bortezomib, melphalan, and prednisone (VMP). A 30-year time horizon and the perspective of the SUS were used for the analysis. Based on literature data, it was possible to observe that the inclusion of this drug to VMP in the treatment of these patients can increase overall survival and progression-free survival. Considering the costs related to this technology and patient management in the Brazilian scenario, however, the inclusion of daratumumab is seemingly above the threshold of acceptability adopted by SUS. For this strategy to be cost-effective in the observed scenario, the technology would require a cost reduction of almost 50%. The study, therefore, does not recommend the inclusion of daratumumab to VMP in the treatment of MM in patients not eligible for TCTH.

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The discovery and description of the role of microRNAs has become very important, specifically due to their participation in the regulation of proteins and transcription factors involved in the development of cancer. microRNA-7 (miR-7) has been described as a negative regulator of several proteins involved in cancer, such as YY1 and KLF4. We have recently reported that YY1 and KLF4 play a role in non-Hodgkin lymphoma (NHL) and that the expression of KLF4 is regulated by YY1. Therefore, in this study we analyzed the role of miR-7 in NHL through the negative regulation of YY1 and KLF4. qRT-PCR showed that there is an inverse expression of miR-7 in relation to the expression of YY1 and KLF4 in B-NHL cell lines. The possible regulation of YY1 and KLF4 by miR-7 was analyzed using the constitutive expression or inhibition of miR-7, as well as using reporter plasmids containing the 3 'UTR region of YY1 or KLF4. The role of miR-7 in NHL, through the negative regulation of YY1 and KLF4 was determined by chemoresistance and migration assays. We corroborated our results in cell lines, in a TMA from NHL patients including DLBCL and follicular lymphoma subtypes, in where we analyzed miR-7 by ISH and YY1 and KLF4 using IHC. All tumors expressing miR-7 showed a negative correlation with YY1 and KLF4 expression. In addition, expression of miR-7 was analyzed using the GEO Database; miR-7 downregulated expression was associated with pour overall-survival. Our results show for the first time that miR-7 is implicate in the cell migration and chemoresistance in NHL, through the negative regulation of YY1 and KLF4. That also support the evidence that YY1 and KLF4 can be a potential therapeutic target in NHL.

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This paper will review the current status of genomic-based therapy of gynecologic malignancies. The routine "standard-of-care" delivery of targeted therapeutics based on the presence of specific molecular biomarkers in the management of the gynecologic malignancies has been delayed compared to the substantial progress made in several other tumor types. However, relatively recently reported and rather robust phase 3 trial data have confirmed a potentially major role for PARP inhibitors as both active treatment and maintenance therapy of advanced ovarian cancer. Further, data demonstrating the presence of a specific molecular phenotype (micro-satellite ( instability high - MSI-H) is a valid biomarker for the potential clinical utility of checkpoint inhibitor immunotherapy has relevance for all gynecologic malignancies, and particularly in the setting of metastatic or recurrent endometrial cancer. CONCLUSIONS: The introduction of PARP inhibitors into the oncology armamentarium has substantially impacted standard-of-care strategies in the management of ovarian cancer. It is anticipated that the results of ongoing and future trials will further define the role of genomic-based therapy in ovarian cancer and other gynecologic malignancies.

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Yolk sac tumor (YST) is the second most common subtype of ovarian germ cell tumors. It usually occurs in the second and third decades of life and is rare in postmenopausal women. In postmenopausal women, YST is commonly an aggressive tumor and can present as a pure germ cell component or as a mixed component with other germ cell or epithelial components. The recognition of this histological subtype is important not only for differential diagnosis but also for determining prognosis and treatment decisions. In this case report, we describe a 61-year-old woman with YST coexisting with epithelial carcinoma focusing on the efficacy of systemic therapies.

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Abstract Introduction: The widespread use of antiretroviral therapy has increased the survival rates of patients infected with human immunodeficiency virus (HIV) and, in consequence, the prevalence of both defining and non-defining cancers. In Colombia, information in this regard is unknown. Objective: To determine the prevalence of defining malignancies in adult patients with HIV treated at the National Cancer Institute over a seven-year period. Materials and methods: Descriptive study involving adult patients diagnosed with HIV and cancer. Sociodemographic variables, CD4 count, viral load and antiretroviral therapy were analyzed by establishing association measures with the presence of defining malignancies. Results: 139 patients with confirmed HIV and cancer diagnosis were found; 84.2% were men. The age range was between 18 and 71 years, with a mean of 41.3±10.9 years. Defining cancers corresponded to 65.5% of the cases, the most frequent being non-Hodgkin lymphoma. The remaining percentage corresponded to non-defining cancers, mainly anal cancer and Hodgkin's lymphoma. Conclusion: Despite the global trend, the population studied here shows predominance of defining cancers, which, like HIV, continue to be detected at a late stage.

Resumen Introducción. El uso de la terapia antirretroviral ha aumentado la supervivencia de los pacientes con virus de inmunodeficiencia humana (VIH) y, como consecuencia, la prevalencia de cánceres definitorios y no definitorios. En Colombia no se conoce información al respecto. Objetivo. Determinar la prevalencia de neoplasias definitorias en pacientes adultos con VIH del Instituto Nacional de Cancerología en un período de 7 años. Materiales y métodos. Se realizó un estudio descriptivo que incluyó pacientes adultos con diagnóstico de VIH y cáncer. Se analizaron variables sociodemográficas, conteo de CD4, carga viral y tratamiento antirretroviral. Se establecieron medidas de asociación entre las últimas tres variables y la aparición de neoplasias definitorias. Resultados. Se estudiaron 139 pacientes con diagnóstico de VIH y cáncer, 84.2% de los cuales eran hombres. El rango de edad osciló entre 18 y 71 años con una media de 41.3±10.9 años. Las neoplasias definitorias se presentaron en 65.5% de los casos; la más frecuente fue el linfoma no Hodgkin. El porcentaje restante correspondió a neoplasias no definitorias, en su mayoría, cáncer anal y linfoma de Hodgkin. Conclusión. Pese a la tendencia mundial, en la población evaluada hay preponderancia de neoplasias definitorias, las cuales -al igual que el VIH- siguen detectándose de forma tardía.

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Sulindac sulfide is a non-steroidal anti-inflammatory drug (NSAID) with chemopreventive effect on human cancer cells. Due to the involvement of the somatic recombination in the carcinogenic process, sulindac sulfide's recombinogenic potential was evaluated by the Homozygotization Index (HI) in the filamentous fungus Aspergillus nidulans. The drug's recombinogenic potential was evaluated by its capacity to induce homozygosis of recessive genes from heterozygous diploid cells. Sulindac sulfide at 175 and 350 µM concentrations induced mitotic recombination in A. nidulans diploid cells, with HI values for genetic markers higher than 2.0, and significantly different from control HI values. The recombinogenic effect of NSAID was related to the induction of DNA strand breaks and cell cycle alterations. Sulindac sulfide's carcinogenic potential was also discussed.

Sulfeto de sulindaco é um antiinflamatório não-esteroidal com efeitos quimiopreventivos em cânceres humanos. O presente estudo teve como objetivo avaliar o potencial recombinagênico do sulfeto de sulindaco em células diplóides de Aspergillus nidulans. O efeito recombinagênico da droga foi demonstrado através da homozigotização de genes recessivos, previamente presentes em heterozigose. Os valores de HI (Índice de Homozigotização) para diferentes marcadores genéticos apresentaram-se maiores do que 2,0 e significativamente diferentes dos valores obtidos em sulfeto de sulindaco ausência da droga (controle). O potencial recombinagênico do sulfeto de sulindaco foi associado à indução de quebras na molécula do DNA e a alterações no ciclo celular. O potencial carcinogênico do sulfeto de sulindaco foi discutido no presente trabalho.

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Doxorubicin and etoposide are intercalating agents that inhibit the action of the enzyme topoisomerase II. Both drugs present therapeutic activity in numerous human neoplasms In the present work the recombinagenic potential of these drugs was evaluated by ascomycete Aspergillus nidulans. Their effects on the asexual cycle of A. nidulans was also appraised. Two heterozygous diploid strains of A. nidulans, a wild (uvsH+//uvsH+) and a defective to the DNA repair (uvsH//uvsH) were used. The drugs' recombinagenic potential was evaluated by their capacity to induce homozygosis of recessive genes from heterozygous cells. Both drugs have a recombinagenic effect on diploid cells of A. nidulans. Doxorubicin and etoposide are potentially capable to induce secondary malignancies, mediated by the mitotic crossing-over in eukaryotic cells.

Doxorubicina e etoposida são agentes intercalantes que inibem a ação da enzima topoisomerase II. Ambas drogas são amplamente utilizadas no tratamento de neoplasias. O potencial recombinagênico destes agentes e seus efeitos sobre o ciclo assexual de Aspergillus nidulans foram avaliados no presente trabalho. Duas linhagens diplóides heterozigotas foram utilizadas: uma selvagem (uvsH+//uvsH+) e outra deficiente para o reparo do DNA (uvsH//uvsH). O potencial recombinagênico destas drogas foi avaliado pela indução de homozigose de genes recessivos a partir de células heterozigotas. Doxorubicina e etoposida apresentaram efeitos recombinagênicos em ambas linhagens utilizadas. Os resultados permitem concluir que doxorubicina e etoposida são agentes potencialmente capazes de induzir malignidades secundárias, mediadas pelo crossing-over mitótico, em células diplóides eucariotas.