Gender disparities in kidney replacement therapies and transplantation in Colombia.

BACKGROUND: In chronic kidney disease (CKD), there are historical inequities in multiple stages of the pathway for organ transplantation. Women have been recognized as disadvantaged within this process even after several efforts. Therefore, we aimed to analyze the prevalence and incidence of CKD by gender and their access to Kidney replacement therapy (KRT) in Colombia. METHODS: A cross-sectional study based on secondary analysis of national information on CKD, hypertension, diabetes, waiting list, deceased, and living donor transplantation between 2015 and 2020. RESULTS: In Colombia, 4.934.914 patients were diagnosed with hypertension, diabetes, or CKD. 60,64% were female, with a mean age of 63.84 years (SD 14,36). Crude incidence for hypertension (10.85 vs. 7.21 /1000 inhabitants), diabetes mellitus (3.77 vs. 2.98 /1000 inhabitants), and CKD (4 vs. 2 /1000 inhabitants) was higher for females. Crude incidence for KRT was 86.45 cases /100.0000 inhabitants. In 2020, 2978 patients were on the waiting list, 44% female. There were 251 deaths on the waiting list, 38% female. This year, 517 kidney transplants were performed, and only 40% were female. CONCLUSION: In Colombia, there are proportionally more females with CKD and precursor comorbidities. Nevertheless, there are fewer females on the waiting list and transplanted annually.

Rechazo crónico mediado por anticuerpos

Contexto el rechazo crónico mediado por anticuerpos (cABMR, chronic antibody-mediated rejection) se considera una de las principales causas de disfunción crónica del injerto. Objetivo profundizar en la comprensión de los mecanismos que la ocasionan para diseñar tratamientos efectivos, dado que es muy poco lo que se ha avanzado en el tratamiento de esta patología. Metodología en esta revisión narrativa de la literatura, presentamos los factores de riesgo relacionados con la disfunción crónica del injerto, haciendo énfasis en la fisiopatología, el diagnóstico y el tratamiento del cABMR. Resultados el factor de riesgo más relevante para el desarrollo de disfunción crónica del injerto es el desarrollo de anticuerpos donante específicos (DSA) y ABMR. Para el diagnóstico de cABMR activo, se requieren los criterios de Banff 2017 (los tres deben estar presentes: Evidencia histológica de lesión tisular crónica, evidencia de inflamación actual en el endotelio vascular ocasionada por anticuerpos y evidencia serológica de DSA. El cABMR no tiene un tratamiento efectivo. Conclusiones dado que cABMR no tiene un tratamiento efectivo, es importante disminuir la exposición a los factores de riesgo y hacer un diagnóstico y un tratamiento oportuno de los eventos agudos de lesión renal que contribuyen a la progresión de disfunción crónica del injerto.

Context Chronic antibody-mediated rejection (cABMR) is considered one of the main causes of chronic graft. Objective To review the mechanisms that cause cABMR to design effective treatments, since it is very little what has been advanced in it treatment of this pathology. Methodology In this narrative review of the literature, we present the risk factors related to the chronic dysfunction of the injection, emphasizing the pathophysiology the diagnosis and treatment of cABMR. Results The most relevant risk factor for the development of chronic graft dysfunction is the development of specific donor antibodies (DSA) and ABMR. For the diagnosis of active cABMR, the criteria of Banff 2017 are required (three must be present: histological evidence of chronic tissue injury, evidence of current inflammation in the vascular endothelium caused by antibodies and serological evidence of DSA. The cABMR does not have an effective treatment. Conclusions Since cABMR does not have an effective treatment, it is important reduce exposure to risk factors and carry out a diagnosis and treatment of the acute events of kidney injury that contribute to the progression of chronic injection dysfunction.

Risk factors for graft loss and death among kidney transplant recipients: A competing risk analysis.

INTRODUCTION: Kidney transplantation is the best therapeutical option for CKD patients. Graft loss risk factors are usually estimated with the cox method. Competing risk analysis could be useful to determine the impact of different events affecting graft survival, the occurrence of an outcome of interest can be precluded by another. We aimed to determine the risk factors for graft loss in the presence of mortality as a competing event. METHODS: A retrospective cohort of 1454 kidney transplant recipients who were transplanted between July 1, 2008, to May 31, 2019, in Colombiana de Trasplantes, were analyzed to determine risk factors of graft loss and mortality at 5 years post-transplantation. Kidney and patient survival probabilities were estimated by the competing risk analysis. The Fine and Gray method was used to fit a multivariable model for each outcome. Three variable selection methods were compared, and the bootstrapping technique was used for internal validation as split method for resample. The performance of the final model was assessed calculating the prediction error, brier score, c-index and calibration plot. RESULTS: Graft loss occurred in 169 patients (11.6%) and death in 137 (9.4%). Cumulative incidence for graft loss and death was 15.8% and 13.8% respectively. In a multivariable analysis, we found that BKV nephropathy, serum creatinine and increased number of renal biopsies were significant risk factors for graft loss. On the other hand, recipient age, acute cellular rejection, CMV disease were risk factors for death, and recipients with living donor had better survival compared to deceased-donor transplant and coronary stent. The c-index were 0.6 and 0.72 for graft loss and death model respectively. CONCLUSION: We developed two prediction models for graft loss and death 5 years post-transplantation by a unique transplant program in Colombia. Using a competing risk multivariable analysis, we were able to identify 3 significant risk factors for graft loss and 5 significant risk factors for death. This contributes to have a better understanding of risk factors for graft loss in a Latin-American population. The predictive performance of the models was mild.

Herpes simplex virus-1 encephalitis in a kidney transplant patient / Encefalitis por herpes simple tipo 1 en paciente con trasplante renal

Abstract The incidence of herpes simplex virus-1 (HSV-1) infection in kidney transplant patients is 3% in those who have received antiviral prophylaxis versus 9.8% without prophylaxis. Herpes viruses usually cause mucocutaneous lesions and only occasionally cause visceral disease or central nervous system infection in immunosuppressed and immunocompetent patients. The gold standard for diagnosis is DNA detection using polymerase chain reaction (PCR) in the affected organ. According to the literature, it is treated with acyclovir, with which remission is expected in most cases without sequelae. Here we present the clinical case of a kidney transplant patient who had HSV-1 encephalitis (with the virus detected in the cerebrospinal fluid (CSF) through PCR), and received the standard treatment with complete recovery of his neurological state. (Acta Med Colomb 2020; 45. DOI:https://doi.org/10.36104/amc.2020.1387).

Resumen La infección por herpes simple tipo 1 (HSV tipo 1) en los pacientes con trasplante renal tiene una incidencia de 3% en quienes han recibido profilaxis antiviral versus 9.8% sin profilaxis. Los virus herpes habitualmente producen lesiones mucocutáneas y sólo en ocasiones causan patología visceral o infección del sistema nervioso central en pacientes inmunosuprimidos e inmunocompetentes. La prueba de oro estándar para su diagnóstico es la detección del ADN mediante la reacción de cadena polimerasa (PCR) en el órgano afectado. El tratamiento de acuerdo con la literatura es con aciclovir, con el cual se espera una remisión de la enfermedad en la mayoría de los casos sin secuelas. A continuación, presentamos el caso clínico de un paciente con trasplante renal quien cursó con encefalitis por HSV tipo 1 detectado en líquido cefalorraquídeo (LCR) mediante PCR, quien recibió tratamiento estándar con recuperación completa de su estado neurológico.(Acta Med Colomb 2020; 45. DOI:https://doi.org/10.36104/amc.2020.1387).

Acute Rejection in Kidney Transplantation and Early Beginning of Tacrolimus.

BACKGROUND: Although tacrolimus is an effective immunosuppressive drug used for preventing biopsy proven acute rejection (BPAR) in kidney transplanted patients, its nephrotoxicity may compromise renal function and lead to delayed initiation because of its side effects. This study aimed to evaluate the safety of early initiation of tacrolimus in the occurrence of BPAR during the first 90 days post transplant. METHODS: We conducted a retrospective cohort study involving 315 patients who underwent kidney transplantation from 2015 to 2017. Comparisons were performed between 2 groups according to whether the start time of tacrolimus therapy was delayed or not delayed. Cox proportional hazards models were used to examine the association between variables and the occurrence of BPAR. RESULTS: The incidence of BPAR was 14.9% (n = 47) and it was significantly higher in the delayed group (19.4% vs 6.4%; P = .002). Delayed initiation tacrolimus group was significantly associated with the risk of BPAR (hazard ratio: 2.95; P < .036). The overall mortality rate was 2.5% (n = 8) and there was no association between delayed initiation therapy and death (P = .56). CONCLUSION: Our study confirmed that delayed initiation of tacrolimus in patients with delayed graft function is associated with a high risk of BPAR.

Abuso de alcohol en niños y adolescentes escolarizados y factores asociados / Alcohol abuse and associated factors in student children and adolescents

Introducción: Estudios previos han confirmado altas prevalencias de abuso de alcohol en adolescentes escolarizados de Bucaramanga; sin embargo, son escasos los estudios sobre factores asociados. Objetivo: Evaluar la prevalencia del abuso de alcohol en niños y adolescentes escolarizados de Bucaramanga, Colombia, y sus factores asociados. Metodología: Una muestra aleatoria de estudiantes adolescentes completó un cuestionario anónimo acerca del consumo de alcohol, sustancias ilegales y legales, el cuestionario CAGE y una serie de escalas y cuestionarios que evaluaban factores de riesgo para abuso de alcohol. Para ajustar por variables de confusión, se realizó un análisis multivariado mediante un modelo de regresión logística. Resultados: Se encuestaron 2.916 estudiantes. La edad de la muestra estuvo entre 10 y 22 años, con una media de 14,4 años (DE = 1,65); 51,1% eran mujeres, 36% cursaban básica superior (10° y 11°), el 17,66 % en colegios privados. El patrón de consumo abusivo de alcohol medido por la escala del CAGE fue del 14,6% (IC95%; 13,3-16,0%). Los factores asociados fueron: edad (OR = 1,15, IC95% 1,04-1,27), tener un hermano consumidor de cigarrillo o alcohol (OR = 1,48, IC95% 1,01-1,17), comportamiento antisocial (OR = 3,03, IC95% 2,12-4,32), mejor amigo que consume sustancias ilícitas (OR =1,71, IC95% 1,06-2,76), mejor amigo que fuma o consume alcohol (OR = 2,01, IC95% 1,40-2,88). Conclusiones: Uno de cada siete estudiantes presentó un patrón de consumo abusivo de alcohol. La influencia de los amigos, la familia, la edad y el comportamiento antisocial fueron los factores asociados…

Introduction:Previous studies have confirmed high prevalence of alcohol abuse in adolescent students from Bucaramanga, Colombia. However, few studies on the associated factors have been carried out. Objective: Assessment of prevalence of alcohol abuse and associated factors in student children and adolescents from Bucaramanga. Methodology: A random sample of adolescent students completed an anonymous questionnaire about the consumption of alcohol, illegal and legal substances, together with the CAGE questionnaire and a series of scales and questionnaires assessing risk factors for alcohol abuse. To adjust for confusing variables, a multivariate analysis was performed using a logistic regression model. Results: 2916 students were surveyed with an average age between 10 and 22, and a mean of 14.4 years (SD 1.65), 51.1% were female, 36% were in the last two years of high school (10thand 11th grades), and 17.66% were in private schools. The alcohol abuse pattern as measured by the CAGE scale was 14.6% (95% CI, 13.3 - 16.0%). The associated factors were: age (OR: 1.15, 95% CI 1.04 - 1.27), having a smoking or consuming alcohol sibling (OR: 1.48, 95% CI, 1.01 - 1.17) antisocial behavior (OR 3.03, 95% CI, 2.12 - 4.32) and best friend who uses illicit substances (OR 1.71, 95% CI, 1.06 - 2.76), best friend who smokes or drinks alcohol (OR 2.01, 95% CI, 1.40 - 2.88). Conclusions: One out of 7 students showed a pattern of alcohol abuse. The associated factors were the influence of friends, family, age and antisocial behavior…