Asociación de la gamma glutamil transferasa con la presencia y progresión de calcificaciones aórticas abdominales y con cambios en densidad mineral ósea / Association of gamma glutamyl transferase in the presence and progression of abdominal aortic calcifications and changes to bone mineral density

Introducción y objetivo: la calcificación aórtica abdominal (CAA) es predictora de eventos cardiovasculares. El objetivo de este trabajo fue valorar la asociación de la gamma glutamil transferasa (GGT) con presencia y progresión de CAA y los cambios en densidad mineral ósea (DMO) en columna lumbar y cuello femoral. Material y métodos: se seleccionaron 326 hombres y mujeres mayores de 50 años que realizaron un cuestionario, dos radiografías laterales dorso-lumbares y DMO, repitiendo a los 4 años las mismas pruebas y un estudio analítico. Resultados: la presencia y progresión de CAA (nuevas o mayor severidad) fue inferior en el cuartil 1 (Q1) de GGT respecto a los otros cuartiles (40 % vs. 58 %, p = 0,021; 24 % vs. 44 %, p = 0,022). Comparado con Q1, el análisis de regresión logística ajustado por confusores mostró que los Q2 y Q4 se asociaron con aumentos en la presencia de CAA [odds ratio (OR) = 2,53, intervalo de confianza del 95 % (IC 96 %) = (1,22-5,25) y OR = 3,04, IC 95 % = (1,36-6,77)] y Q2, Q3 y Q4 se asociaron con aumentos en progresión de CAA [OR = 2,24, IC 95 % = (1,07-4,67); OR = 2,35, IC 95 % = (1,09-5,07) y OR = 3,47, IC 95 % = (1,56-7,70)]. El análisis multivariante por sexos mostró que tanto en hombres como mujeres el Q4 de GGT se asoció con progresión de CAA [OR = 3,27, IC 95 % = (1,14-9,36) y OR = 3,26, IC 95 % = (1,03-10,29) respectivamente] y en mujeres con mayores pérdidas de DMO a nivel lumbar. No hubo efecto con respecto a la prevalencia de CAA. Conclusiones: valores elevados de GGT podrían ser un indicador de presencia y progresión de CAA en población mayor de 50 años. De forma separada por sexo, los mayores niveles de GGT se asociaron con progresión de CAA, siendo un marcador pronóstico de daño cardiovascular.(AU)

Introduction and objective: abdominal aortic calcification (AAC) is a predictor of cardiovascular events. This study aimedto assess the association of gamma glutamyl transferase (GGT) in the presence and progression of AAC, as well as changesto bone mineral density (BMD) in the lumbar spine and femoral neck.Materials and methods: a total of 326 men and women over 50 years of age were selected for this study. They completeda questionnaire, underwent two lateral dorso-lumbar spine X-rays, and BMD measurements. The same tests and 1 analyticalassessment were repeated after 4 years.Results: the presence and progression of AAC (new occurrences or increased severity) were lower in GGT quartile 1 (Q1)compared with the other quartiles (40 % vs 58 %; p = 0.021; 24 % vs 44 %; p = 0.022). Compared with Q1, the confound -ers-adjusted logistic regression analysis showed that Q2 and Q4 were associated with more presence of AAC [odds ratio(OR), 2.53; 95 % confidence interval (95 % CI), 1.22-5.25 and OR, 3.04; 95 % CI, 1.36-6.77]. Additionally, Q2, Q3, and Q4were associated with more AAC progression [OR, 2.24; 95 % CI, 1.07-4.67; OR, 2.35; 95 % CI, 1.09-5.07; and OR, 3.47;95 % CI, 1.56-7.70]. The gender-stratified multivariate analysis revealed that in both men and women, the Q4 of GGT wasassociated with AAC progression [OR, 3.27; 95 % CI, 1.14-9.36, and OR, 3.26; 95 % CI, 1.03-10.29, respectively], and inwomen alone, with greater lumbar BMD losses. There were no effects regarding the prevalence of AAC.Conclusions: elevated GGT levels could serve as an indicator of the presence and progression of AAC in individuals olderthan 50 years. When analyzed separately by gender, higher GGT levels were associated with AAC progression, which actedas a prognostic marker for cardiovascular disease.(AU)

Effect of Type of Dialysis on CMV-Specific CD8+ T Cells in Kidney Transplant Candidates.

Background: Dialysis is the first procedure to partially replace renal function in end-stage renal diseases, despite several adverse side effects, such as infections. The primary aim of this study was to evaluate the levels of immune CMV-specific CD8+ T cells in a representative cohort of pre-transplant patients receiving hemodialysis (HD) or peritoneal dialysis (PD). The secondary aim was to monitor the CMV-specific CD8+ T cells in kidney transplant recipients undergoing different types of dialysis during the first year following their transplant. Methods: Sixty-nine patients were enrolled and examined with respect to the type of dialysis they received. HLA class I dextramers for CMV were used to determine the quantity of CMV-specific CD8+ T cells. The CMV DNA viral load was also determined. Forty-two of the patients enrolled in the study underwent solid organ transplantation and were analyzed during their first year post-transplantation. Results: Patients receiving HD had fewer CMV-specific CD8+ T cells than those in PD (p < 0.05). We also observed that patients in PD had more CMV-specific CD8+ T cells during the follow-up period than those in HD (p < 0.05), independently of the CMV DNA. Finally, PD patients had a higher frequency of CD8+ Effector-Memory RA T cells (TEMRA) and a lower frequency of central memory T cells (TCM) than did HD patients. Conclusions: These results indicate the better status of CMV-specific T cell immunity in PD patients. The use of CMV T cell dextramers would be advantageous for monitoring the CD8+ T-specific response, enabling the use of prophylactic treatment to be optimized.

Estenosis de arteria ilíaca tras trasplante renal como causa de hipertensión arterial refractaria y claudicación / Stenosis of the iliac artery after kidney transplantation as a cause of refractory hypertension and intermittent claudication

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