RESUMO
Outcome of patients with transplant glomerulopathy (TG) is poor. Using B-cell targeting molecules represent a rational strategy to treat TG during chronic antibody-mediated rejection. In this pilot study, 21 patients with this diagnosis received four doses of intravenous immunoglobulins and two doses of rituximab (IVIG/RTX group). They were retrospectively compared with a untreated control group of 10 patients. At 24 months post-biopsy, graft survival was similar and poor between the treated and the untreated group, 47% vs. 40%, respectively, p = 0.69. This absence of response of IVIG/RTX treatment was observed, regardless the phenotype of TG. Baseline estimated glomerular filtration rate (eGFR) and decline in eGFR during the first six months after the treatment were risk factors associated with 24-month graft survival. The IVIG/RTX therapy had a modest effect on the kinetics of donor-specific alloantibodies at M24, compared to the untreated group, not associated with an improvement in graft survival. The mean number of adverse events per patient was higher in the IVIG/RTX group than in the control group (p = 0.03). Taken together, IVIG/RTX treatment for severe TG during chronic antibody-mediated rejection does not seem to change the natural history of TG and is associated with a high incidence of adverse events.
Assuntos
Glomerulosclerose Segmentar e Focal/terapia , Rejeição de Enxerto/terapia , Imunoglobulinas Intravenosas/uso terapêutico , Transplante de Rim/efeitos adversos , Rituximab/uso terapêutico , Adulto , Estudos de Casos e Controles , Feminino , Seguimentos , Taxa de Filtração Glomerular , Glomerulosclerose Segmentar e Focal/etiologia , Glomerulosclerose Segmentar e Focal/mortalidade , Rejeição de Enxerto/etiologia , Rejeição de Enxerto/mortalidade , Sobrevivência de Enxerto , Humanos , Fatores Imunológicos/uso terapêutico , Falência Renal Crônica/cirurgia , Testes de Função Renal , Masculino , Projetos Piloto , Prognóstico , Estudos Retrospectivos , Fatores de Risco , Taxa de SobrevidaRESUMO
There has been a wealth of new developments in dialysis this year with the publication of several trials relating to dialysis technique, physical activity and the use of new dialysis treatments. Quality of life should be assessed and managed in all dialysis patients. Lowering the temperature of the dialysis bath in the MyTemp trial does not appear to have an effect on mortality and cardiovascular events. High volume convective hemodiafiltration currently represents the reference technique in hemodialysis; the Convince study confirms its superiority in terms of all-cause mortality. The DIATT study shows the benefit of the presence of an adapted physical activity professional to promote physical activity in dialysis patients and shows that it is necessary for this support to be reimbursed. The RENAL-AF and AXADIA-AFNET 8 studies lack power to conclude on the use of new oral anticoagulants in hemodialysis. For angiotensin receptor neprilysin inhibitors, studies are too weak to allow their use. SGLT2 inhibitors could be used in peritoneal dialysis to increase diuresis or delay the appearance of peritoneal fibrosis but to date only studies on models animals exist. Factor XI inhibitors are a new therapeutic class that could be used and would reduce the risk of thrombosis and hemorrhage. Increasingly, the feelings of patients and caregivers are more and more taken into account. Patient/caregiver communication must be at the heart of care. We will also be looking at the conservative treatment, the management of pruritus in hemodialysis and finally the care of patients with calciphylaxis.
Les nouveautés en dialyse ont été riches cette année avec la publication de plusieurs essais touchant aussi bien à la technique de dialyse, à l'activité physique et à l'utilisation de nouveaux traitements en dialyse. La qualité de vie doit être évaluée et prise en charge chez tous les patients dialysés. La baisse de température du bain de dialyse dans l'essai MyTemp ne semble pas avoir d'effet sur la mortalité et les événements cardiovasculaires. L'hémodiafiltration haut volume convectif représente la technique de référence en hémodialyse dialyse actuellement : l'étude Convince confirme sa supériorité en termes de mortalité toute cause. L'étude DIATT montre l'intérêt de la présence d'un professionnel en activité physique adaptée pour favoriser l'activité physique chez les patients dialysés et montre qu'il est nécessaire que cette prise en charge soit remboursée. Les études RENAL-AF et AXADIA-AFNET 8 manquent de puissance pour conclure sur l'utilisation des nouveaux anticoagulants oraux en hémodialyse. Pour les angiontensin receptor neprilysin inhibitor, les études sont trop faibles pour permettre leur utilisation. Les inhibiteurs des cotransporteurs sodium-glucose de type 2 (iSGLT2) pourraient être utilisés en dialyse péritonéale pour augmenter la diurèse ou retarder l'apparition de la fibrose péritonéale mais, à ce jour, seules des études sur modèles animaux existent. Les inhibiteurs du facteur XI sont une nouvelle classe thérapeutique qui pourrait être utilisée et diminuerait le risque de thrombose et d'hémorragie. Le ressenti des patients et aidants est de plus en plus pris en compte. La communication patients/soignants doit être au cÅur de la prise en charge. Seront abordés également le traitement conservateur, la prise en charge du prurit en hémodialyse et le soin des patients atteints de calciphylaxie.
RESUMO
The acid production of endogenous origin depends mainly on the metabolism of the food and varies with the nature of these. Of the order of 1mEq/kg/day for contemporary food in industrialized countries, it is reduced by more than one third among vegetarians and close to neutrality among vegans. The dietary acid load is eliminated by the normal kidneys, thus maintaining the acid-base equilibrium. In the setting of CKD, it will overflow the capacities of the nephrons, generating a retention of H+ ions, promoting subclinical acidosis. This tissue retention of H+ ions was confirmed by direct techniques in animal models and indirect techniques in humans. The systemic retention of H+ ions and the accompanying compensatory mechanisms have negative consequences on bone tissue, skeletal muscle, cardiovascular risk and renal function. In the animal, the substitution of casein (acid) by soy (alkaline) prevents metabolic acidosis and slows the progression of renal insufficiency. In man, various prospective studies have confirmed that the risk of renal insufficiency was positively correlated with the dietary acid load. Conversely, bicarbonate supplementation and/or a diet enriched with fruits and vegetables, have a favorable effect on renal insufficiency, including in subjects with normal bicarbonate. These results lead to reconsider the K/DOQI recommendations to correct acidosis when the bicarbonate level falls below 22mEq/L, since tissue retention of H+ ions and its negative consequences appear at higher or even normal levels of bicarbonates.