Survival of patients living with HIV and cancer in Cali, Colombia

Background: People living with HIV have an increased risk of cancer compared to the general population. However, with the increase in life expectancy and advances in antiretroviral therapy, the survival of patients with cancer and HIV has changed. Objective: To determine the survival of patients living with HIV and cancer in Cali, Colombia Methods: A retrospective cohort study was conducted at the Fundación Valle del Lili, Cali, Colombia. Data from the HIV database was crossed with data from the hospital and population-based cancer registries between 2011-2019. Patients <18 years, limited available clinical information on the diagnosis and treatment of HIV and cancer, and non-oncological tumor diagnosis were excluded. Results: A total of 173 patients were included. The frequencies of AIDS-defining neoplasms were: Non-Hodgkin lymphoma (42.8%), Kaposi sarcoma (27.8%), and cervical cancer (4.6%). Overall survival was 76.4% (95% CI 68.9-82.3) at five years. Poorer survival was found in patients with AIDS-defining infections (56.9% vs. 77.8%, p=0.027) and non-AIDS-defining infections (57.8% vs. 84.2%, p=0.013), while there was better survival in patients who received antiretroviral therapy (65.9% vs. 17.9%, p=0.021) and oncological treatment (66.7% vs. 35.4%, p<0.001). The presence of non-AIDS-defining infections increases the risk of dying (HR = 2.39, 95% CI 1.05-5.46, p=0.038), while oncological treatment decreases it (HR = 0.33, 95% CI 0.14-0.80, p=0.014). Conclusions: In people living with HIV, Non-Hodgkin lymphoma and Kaposi sarcoma are the most common neoplasms. Factors such as AIDS-associated and non-AIDS-associated infections have been identified as determinants of survival. Cancer treatment seems to improve survival.

Antecedentes: Las personas que viven con VIH tienen un riesgo mayor de cáncer en comparación con la población general. Sin embargo, con el aumento de la esperanza de vida y los avances en la terapia antirretroviral, la supervivencia de los pacientes con cáncer y VIH ha cambiado. Objetivo: Determinar la supervivencia de los pacientes que viven con VIH y cáncer en Cali, Colombia. Métodos: Se realizó un estudio de cohorte retrospectivo en la Fundación Valle del Lili, Cali, Colombia. Los datos de la base de datos de VIH se cruzaron con los datos de los registros de cáncer de base hospitalaria y poblacional entre 2011-2019. Se excluyeron los pacientes <18 años, con información clínica limitada disponible sobre el diagnóstico y tratamiento del VIH y el cáncer y los casos con diagnóstico de tumor no oncológico. Resultados: Se incluyeron un total de 173 pacientes. Las frecuencias de neoplasias definitorias de SIDA fueron: linfoma no Hodgkin (42.8%), sarcoma de Kaposi (27.8%) y cáncer cervical (4.6%). La supervivencia global fue del 76.4% (IC 95% 68.9-82.3) a los cinco años. Se encontró una peor supervivencia en pacientes con infecciones definitorias de SIDA (56.9% vs. 77.8%, p=0.027) e infecciones no definitorias de SIDA (57.8% vs. 84.2%, p=0.013), mientras que hubo una mejor supervivencia en pacientes que recibieron terapia antirretroviral (65.9% vs. 17.9%, p=0.021) y tratamiento oncológico (66.7% vs. 35.4%, p<0.001). La presencia de infecciones no definitorias de SIDA aumentó el riesgo de morir (HR = 2.39, IC 95% 1.05-5.46, p=0.038), mientras que el tratamiento oncológico lo disminuyó (HR = 0.33, IC 95% 0.14-0.80, p=0.014). Conclusiones: En las personas que viven con VIH, el linfoma no Hodgkin y el sarcoma de Kaposi son las neoplasias más comunes. Se han identificado factores como las infecciones asociadas al SIDA y las infecciones no asociadas al SIDA como determinantes de la supervivencia. El tratamiento del cáncer parece mejorar la supervivencia.

Relación entre el proceso evolutivo del ser humano y su predisposición al cáncer / Relationship between the human being evolutionary process and cancer predisposition

El cáncer se ha convertido en la primera causa de morbimortalidad en numerosos países. En las últimas décadas se ha asistido a un cambio en el paradigma conceptual de las enfermedades neoplásicas, que ahora se enfoca hacia la perspectiva ecológica-evolutiva de estas. Con el objetivo de analizar, con elementos actualizados, la relación entre el proceso evolutivo del ser humano y su predisposición al cáncer, se realizó una revisión sistemática de la literatura, a partir de tres bases de datos, Medline, Scopus, y SciELO. Se tuvieron en cuenta atributos de consistencia de los artículos revisados, se excluyeron los estudios con niveles IV y V de evidencia y los de calidad insuficiente. Las búsquedas acumuladas actuales sugieren la necesidad de ver a las diversas neoplasias desde la perspectiva de la dinámica de sistemas complejos y sus implicaciones evolutivas. El proceso evolutivo humano posee particularidades biosociales que le predisponen a sufrir tumores malignos. La postura bípeda incrementó vulnerabilidad al efecto oncogénico de las radiaciones ultravioletas. La conducta sexual incrementó el riesgo de contraer infecciones por virus oncogénicos. El paso a una predominantemente cárnica y la introducción de la cocción, se tradujo en la incorporación de agentes xenobióticos cuyo metabolismo deriva agentes carcinógenos. La postergación del envejecimiento humano devino en un mayor tiempo para el acúmulo de mutaciones. Las modificaciones en el patrón sexual y reproductivo en la mujer han influido en su predisposición al cáncer de mama. En la génesis poblacional del cáncer subyacen fundamentos biosociales vinculados al proceso evolutivo de la especie(AU)

Cancer has become the leading cause of morbidity and mortality in many countries. In recent decades there has been a change in the conceptual paradigm of neoplastic diseases, which now focuses on the ecological-evolutionary perspective of these. With the aim of analyzing, with updated elements, the relationship between the evolutionary process of the human being and his predisposition to cancer, a systematic review of the literature was made, based on three databases, Medline, Scopus, and SciELO. Consistency attributes of the reviewed articles were taken into account, studies with levels IV and V of evidence and those of insufficient quality were excluded. The current accumulated searches suggest the need to see the various neoplasms from the perspective of the dynamics of complex systems and their evolutionary implications. The human evolutionary process has biosocial peculiarities that predispose it to suffer malignant tumors. Bipedal posture increased vulnerability to the oncogenic effect of ultraviolet radiation. Sexual behavior increased the risk of contracting oncogenic virus infections. The transition to a predominantly meat and the introduction of cooking, resulted in the incorporation of xenobiotic agents whose metabolism derives carcinogens. The postponement of human aging became in a longer time for the accumulation of mutations. Modifications in the sexual and reproductive pattern in women have influenced their predisposition to breast cancer. In the population genesis of cancer underlying biosocial foundations linked to the evolutionary process of the species(AU)

Prevalencia de genotipos del papiloma virus en mujeres de Cuenca / Prevalence of genotypes of papilloma virus in women in Cuenca

Objetivos: Determinar la prevalencia de los genotipos del papiloma virus de alto y bajo grado oncogénico; relacionar con los grupos de edad, con los genotipos que evitan las dos vacunas existentes y con los fatores de riesgo para cáncer cervical uterino. Metodología: Estudio epidemiológico, observacional, transversal. La muestra aleatorizada fue de 500 mujeres de la zona urbana de la ciudad de Cuenca. Se efecturaon dos tomas del cuello uterino. Se utilizó el método de reacción de cadena de polimerasa y el estudio citopatológico Papanicolaou. Resultados: La prevalencia de los genotipos del papiloma virus de alto grado oncogénico fue del 35.9% y para bajo grado el 14.3%. La prevalencia de las alteraciones citológicas, Papanicolaou, fue del 16%. Estas prevalencias fueron más frecuentes en los grupos de 30 a 39 años y 40 a 50 años. Por inferencia, la cobertura de la vacuna Cervarix sería del 8% y para el Gardasil del 13%. Fueron factores de riesgo los relacionados con el número y frecuencia de relaciones sexuales, número de compañeros sexuales. Conclusiones. La prevalencia de los genotipos fue alta y la cobertura de las vacunas baja.

OBJECTIVES. To determine the prevalence of papilloma virus genotypes of high and low oncogenic grade, to relate to age groups, with genotypes that avoid both existing vaccines and the risk factors for uterine cervical cancer. METHODS. Epidemiological, observational, cross-sectional study. The random sample was 500 women from the urban area of Cuenca city. Two samples of the cervix were taken. Polimeraza chain reaction method and cytopathology Papanicolaou study were used. RESULTS. The prevalence of papilloma virus genotypes of high oncogenic grade was 35,9% and 14,3% low oncogenic grade. The prevalence of cytologic abnormalities, Papanicolaou, was 16%. This prevalence was more frequent in the group of 30-39 years, and 40-50 years. By inference, the coverage of the Cervarix vaccine would be 8% and 13% for Gardasil. Risk factors were related to the number and frequency of intercourse and number of sexual partners. CONCLUSION. The prevalence of genotypes was high and the vaccine coverage was low.

Cancer causing viruses and the role of laboratory medicine: literature review and perspectives / Vírus causadores de câncer e o papel da medicina laboratorial: revisão de literatura e perspectivas

Cancer-causing viruses are responsible for up to 20% of cancers with infectious etiology, representing a serious public health problem worldwide. Since the discovery of the first human cancer-causing virus, several others have been associated with neoplasias. Recent advances in technologies for the determination of genomic and proteomic profiles have resulted in the discovery and availability of tumor markers with potential application in the screening, diagnosis, prognosis and treatment of cancer. Therefore, laboratory medicine has stood out as a fundamental tool in the prevention and management of these diseases.

Os vírus causadores de câncer são responsáveis por até 20% dos cânceres de etiologia infecciosa, representando um grave problema de saúde pública em todo o mundo. Desde a descoberta do primeiro vírus causador de neoplasias em humanos, vários outros têm sido associados ao câncer. Recentes avanços nas tecnologias de determinação de perfis genômicos e proteômicos resultaram na descoberta e na disponibilização de marcadores tumorais com potencial aplicação no rastreamento, no diagnóstico, no prognóstico e no tratamento do câncer, destacando a medicina laboratorial como ferramenta fundamental na prevenção e no manejo dessas enfermidades.

Conocimientos, aceptabilidad y actitudes sobre la vacuna contra el VPH en médicos generales, ginecólogos y pediatras en Colombia / Knowledge, Acceptability and Attitudes Towards the HPV Vaccine among Colombian General Practitioners, Gynecologists and Pediatricians in Colombia

Objetivo: Explorar en médicos generales, ginecólogos y pediatras colombianos sus conocimientos generales sobre el virus del papiloma humano (VPH), así como la actitud, disposición personal y percepción que tienen sobre la vacuna contra el VPH. Método: Estudio exploratorio con metodología cualitativa en cuatro regiones de Colombia. En cada una se conformó un grupo focal con médicos generales, ginecólogos y pediatras. Todas las sesiones se grabaron y se transcribieron. Se realizó un análisis de contenido siguiendo las etapas de lectura abierta, codificación, análisis estructural e interpretación crítica. Resultados: Los médicos generales tienen bajos conocimientos del VPH y de la vacuna, mientras que los ginecólogos y los pediatras tienen buenos y excelentes conocimientos, respectivamente. Muchos de los médicos ven una oportunidad de negocio en esta vacuna; en dos regiones son muy escépticos sobre la introducción de la vacuna por la ausencia de protección total y por la dificultad de llegar a la población más necesitada. Conclusiones: En el ámbito médico hay confusión sobre las distintas vacunas, se requiere profundizar en los conocimientos y hay necesidad de dar recomendaciones e indicaciones claras a los médicos. Debe brindarse amplia capacitación y educación, particularmente a los médicos generales, en relación con el VPH, la vacuna y la necesidad de continuar tamizando.

Objective: To survey basic knowledge of the humanpapillomavirus (HPV) among Colombian general paractitioners, gynecologists and pediatricians, as well as their attitudes, personal feelings and perceptions towards the HPV vaccine. Methods: An exploratory, qualitative study was carried out in four regions in Colombia. In each region a focus group made up of general practitioners, gynecologists and pediatricians was set up. Each session was taped and transcribed. Content analysis was based upon the stages of open reading, coding, structural analysis and critical interpretation. Results: General practitioners have scant knowledge of HPV and the vaccine; gynecologists and pediatricians command good and excellent knowledge, respectively. Many physicians espy the commercial gain that could be made off the vaccine. In two regions there was skepticism about introducing the vaccine locally, where it was deemed to be too difficult to achieve total protection, and where it would be unable to reach the needworthy population. Conclusion: Among Colombian physicians, confusion exists concerning the different types of HPV vaccines; therefore, steps should be taken to improve their knowledge on the subject as well as to provide recommendations and clear instructions concerning vaccine application. Educational and training courses, particularly for general practitioners, on HPV, HPV vaccines, and screening should be widely available.

Prevalência do herpes-vírus humano tipo 1 em neoplasias cutâneas epiteliais malignas / Prevalence of human herpes virus type 1 in epithelial skin cancer

FUNDAMENTOS - O DNA viral pode atuar como oncogene, favorecendo o desenvolvimento de neoplasias, como as linfoides e da pele. Entre esses vírus, encontram-se alguns herpes-vírus humanos. OBJETIVO - Identificar a presença de DNA do herpes-vírus humano tipo 1 em neoplasias epiteliais pré-malignas,malignas e pele normal de indivíduos controle, avaliando seu papel na carcinogênese. MÉTODOS - Identificação, por reação em cadeia da polimerase, do DNA viral do tumor e pele sã de 41 pacientes e comparação com grupo controle, sem neoplasia. Análise estatística: Testes de Fisher e de McNemar. RESULTADOS - O vírus foi identificado em 20 indivíduos sem e em 21 com neoplasia. Destes últimos, 11 o expessaram apenas nas células tumorais. A diferença, entretanto, não foi estatisticamente significante. CONCLUSÕES - Parece não haver relação direta entre o encontro do DNA viral na pele sã e na pele tumoral. Sua presença pode facilitar o desenvolvimento da neoplasia ou apenas coincidir de se localizar onde esta já ocorreu.

BACKGROUND - Viral DNA may act as an oncogene, especially in skin and lymphoid organs. This group includes some human herpes virus. OBJECTIVE - To identify human herpes virus type 1 DNA in pre-malignant and malignant skin samples of epithelial tumors comparing to normal skin to determine its role in carcinogenesis. METHODS - Forty-one patients with epithelial tumors were submitted to biopsies from tumor and normal skin. The control group comprised 41 biopsies from patients with other dermatoses than cancer. After DNA extraction, polymerase chain reaction was performed to identify 199-bp band. The results were statistically evaluated by Fisher and McNemar tests. RESULTS - The virus was identified in 20 subjects without cancer and in 21 with skin cancer. From these, 11 expressed it only in tumor cells. This difference was not significant. CONCLUSION - There seem to be no direct relation between viral findings in normal skin and skin cancer cells. It may act as a promoter or just coexist at the same site where a neoplastic transformation has already occurred.

La vacuna contra el virus del papiloma humano: una gran arma para la prevención primaria del cßncer de cuello uterino / The human papillomavirus vaccine: A powerful tool for the primary prevention of cervical cancer

La vacuna profilßctica contra el virus del papiloma humano (VPH) constituye la herramienta de salud pública mßs promisoria para la prevención primaria de cßncer de cuello uterino. La vacunación de mujeres antes de haber adquirido la infección viral tiene un gran impacto en la prevención de lesiones pre- eoplßsicas y cßncer de cuello uterino. Las vacunas actuales no eliminan completamente el riesgo de cßncer de cérvix, por lo tanto las mujeres vacunadas como las que no alcancen a recibir la vacuna, se les debe seguir ofreciendo los programas de detección temprana. Las estrategias que incluyen la combinación de vacunación con alta cobertura de adolescentes y tamización con métodos mßs sensibles que la citología, tales como la prueba de VPH, pueden ser mßs costo-efectivas que las estrategias actualmente utilizadas. La inefectividad de los actuales programas de tamización en países latinoamericanos incluido Colombia, amerita su evaluación inmediata a la luz de la disponibilidad de nuevos métodos que son costo-efectivos en países en desarrollo tales como la prueba de VPH y la inspección visual y tratamiento inmediato para mujeres con dificultades de acceso oportuno al tratamiento.

Prophylactic human papillomavirus (HPV) vaccine is the most promissory public health tool for primary prevention of cervical cancer. Immunization of females before the acquisition of HPV infection has the greatest impact in preventing pre-neoplasic lesions and cervical cancer. Current HPV vaccines do not eliminate cervical cancer risk, therefore, screening should continue covering vaccinated as well as women that do not get the vaccine. The strategies that include combination of high-coverage vaccination of HPV-unexposed adolescents with screening using methods with higher sensitivity than cytology as HPV test may be more cost-effective than the strategies currently used. The cytology-based screening programs of Latin America countries including Colombia are very ineffective. The evidence in favor of the cost-effectiveness of other screening strategies such as HPV tests and visual inspection followed by immediate treatment for women with difficult access to health care services in developing countries warrants the immediate revision of the current strategies.

Infecção pelo vírus epstein-barr e oncogênese: [revisão] / Epstein-Barr virus infection and oncogenesis: [review]

As infecções como um todo associam-se a 15% a 20% dos cânceres em geral. Entre os agentes etiológicos carcinogênicos, destacam-se os vírus oncogênicos. O vírus Epstein-Barr (VER) é o mais potente vírus indutor de transformação e crescimento celular conhecido, sendo capaz de imortalizar linfócitos B humanos. Está relacionado com o linfoma de Burkitt, o carcinoma nasofaríngeo e outros tipos de neoplasia. Porém, não se sabe ao certo se o VER seria apenas um componente inocente ou se contribui realmente para o desenvolvimento desses tumores. A compreensão da persistência do VEB no organismo e dos mecanismos pelos quais, na sua interação com a célula, ele contribui para o surgimento de uma neoplasia pode permitir novas abordagens para a prevenção e o tratamento dos tumores a ele associados.

Infections as a whole are associated with 15% to 20% of human cancers. Amongst a variery of infectious agents, oncogenic viruses are of especial importance, particularly the Epstein-Barr virus (EBV). It is the most efficient vírus known to induce transformation and cellular growth and induces immortality of B-cells. Its relation to Burkitt's lymphoma and nasopharyngeal carcinoma, as well as to other neoplasms, has long been emphazised. However, it is not clear whether it actually plays a causative role in these tumors or is simply an incidental finding. A better understanding of the means of EBV persistence and of the mechanisms by which this vírus leads to malignant transformation of the host-cell may shed light on new approaches to the prevention and treatment of EBV-associated tumors.