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Hospital de Órbigo, Spain

Marquez D.,Nephrology Service
Jornal brasileiro de nefrologia : 'orgão oficial de Sociedades Brasileira e Latino-Americana de Nefrologia | Year: 2012

Uremic pruritus is common among dialysis patients. Effective treatments are not readily available. Early evidence with antihistamines and gabapentin indicate variable effects. To compare the efficacy and side effects of gabapentin and desloratadine in patients with dialysis pruritus. Prospective, open-label, cross-over clinical trial in 22 patients on chronic hemodialysis with sustained pruritus over a period of at least 60 days. After a one-week run-in period, we assigned patients to three weeks of either gabapentin 300 mg thrice weekly or desloratadine 5 mg thrice weekly. After a one-week washout period, each patient crossed-over to the alternate regimen for three more weeks. The primary endpoint of the study was the change in the visual analogue pruritus score (VAS). Nineteen subjects completed the two treatment blocks and were available for analysis. VAS scores decreased with both treatments (5.95 to 4.6 with gabapentin, p = 0.07; 5.89 to 3.4 with desloratadine, p = 0.004), but only desloratadine reached statistical significance. There were no differences when comparing the final pruritus score with gabapentin and desloratadine (4.6 versus 3.4, p = 0.16) Excessive sedation was common with gabapentin. Desloratadine was well tolerated. Desloratadine provides significant relief of uremic pruritus compared with no therapy. gabapentin has marginal efficacy. Desloratadine is better tolerated than gabapentin.

Silva Jr. H.T.,Federal University of Sao Paulo | Felipe C.R.,Federal University of Sao Paulo | Garcia V.D.,Kidney and Pancreas Transplant Unit | Neto E.D.,University of Sao Paulo | And 4 more authors.
American Journal of Transplantation | Year: 2013

Planned conversion from tacrolimus to sirolimus was evaluated in de novo kidney transplant recipients. In this multicenter, randomized, open-label study, 297 patients were initially treated with tacrolimus, mycophenolate sodium and prednisone. Of the 283 patients reaching 3 months, 97 were converted to sirolimus (SRL), 107 were maintained on tacrolimus (TAC) and 79 were patients receiving TAC without criteria to undergo intervention at month 3 (TACex). The primary objective was to show superior estimated glomerular filtration rate (eGFR) in the SRL group at month 24. Of the 258 patients who completed 24 months, 91 (94%) were in the SRL group, 101 (94%) in the TAC group and 66 (84%) in the TACex group. In the intention-to-treat population there were no differences in eGFR (66.2 ± 25.3 vs. 70.7 ± 25.1, p = 0.817) or in the severity of chronic sclerosing lesions scores in 24-month protocol biopsies. Higher mean urinary protein-to-creatinine ratio (0.36 ± 0.69 vs. 0.15 ± 0.53, p = 0.03) and higher incidence of treated acute rejection between months 3-24 (13.4% vs. 4.7%, p = 0.047) were observed in SRL compared to TAC group. In this population planned conversion from TAC to SRL 3 months after kidney transplantation was not associated with improved renal function at 24 months. In this multicenter, randomized, open-label study, the authors show that planned conversion from tacrolimus to sirolimus 3 months after kidney transplantation was not associated with improved renal function or histological structure at 24 months. © Copyright 2013 The American Society of Transplantation and the American Society of Transplant Surgeons.

Domingos F.,University of Lisbon | Serra A.,Nephrology Service
Scandinavian Journal of Urology | Year: 2014

Kidney stones and metabolic syndrome (MetS) are common conditions in industrialized countries. There is growing evidence of associations between kidney stone disease and MetS or some of its components. The link between uric acid stones and MetS is well understood, but the link with calcium oxalate (CaOx) stones, the most common kidney stone composition, is more complex, and MetS is frequently overlooked as a risk factor for calcium nephrolithiasis. The physiopathological mechanisms of kidney stone disease in MetS are reviewed in this article. Uric acid stones are a consequence of the excessively acidic urine that results from insulin resistance. The pathophysiology of CaOx stones may include: increased excretion of lithogenesis promoters and decreased excretion of inhibitors; increased risk of Randall's plaque development; and inflammatory damage to renal epithelia by oxidative stress, as a consequence of the insulin-resistant milieu that characterizes MetS. The last mechanism contributes to the adhesion of CaOx crystals to subepithelial calcium deposits working as anchor sites where stones can grow. The predominant MetS features could determine the chemical composition of the stones in each patient. Kidney stones may be a renal manifestation of MetS and features of this syndrome should be looked for in patients with idiopathic nephrolithiasis. © 2014 Informa Healthcare.

Lucchetti G.,Sao Paulo Medical Spiritist Association | Lucchetti G.,Federal University of Sao Paulo | de Almeida L.G.C.,Nephrology Service | Lucchetti A.L.G.,Sao Paulo Medical Spiritist Association
Hemodialysis International | Year: 2012

Patients with chronic kidney disease often use religion as a coping strategy to relieve suffering and serve as a source of strength. The aim of this study was to identify religious aspects associated with mental health and quality of life in Brazilian dialysis patients. A cross-sectional study was performed involving two dialysis centers in Brazil. Patients were selected consecutively over three typical dialysis treatment days. The questionnaire was self-administered and covered the following aspects: socio-demographic aspects, religiousness (using the Portuguese version of the Private and Social Religious Practice Scale), quality of life (World Health Organization Quality of Life brief Scale Brief Version), depression and anxiety (Beck Inventory), and pain grade. For statistical analysis, the hypothesis that different religious variables are associated (positively or negatively) with depressive/anxiety symptoms and quality of life in these patients was tested using linear regression, controlling for confounding variables. A total of 205 patients were invited to participate and 133 (64.8%) agreed to fill out the questionnaire. On the adjusted model, reading religious literature was found to be inversely associated with depressive symptoms (P<0.001). In addition, the psychological domain of quality of life was positively associated with an increase in patient religiosity (P=0.030) and greater religious importance for recovery from their dialysis condition (P=0.016), whereas the environmental domain was positively associated with greater religious importance for recovery (P=0.032). No religious aspects were associated with anxiety symptoms. Religiousness is associated with less depressive symptoms and better quality of life in Brazilian dialysis patients. Nephrologists should evaluate the patient's spirituality and religion in order to provide more integrative care. © 2011 The Authors; Hemodialysis International © 2011 International Society for Hemodialysis.

Nazarian R.M.,Massachusetts General Hospital | Mandal R.V.,New York University | Kagan A.,Nephrology Service | Kay J.,University of Massachusetts Medical School | Duncan L.M.,Massachusetts General Hospital
Journal of the American Academy of Dermatology | Year: 2011

Background: Nephrogenic systemic fibrosis (NSF) affects patients with impaired renal function who have received gadolinium-containing contrast agents (GCCAs). Increased dermal cellularity is a key diagnostic feature of NSF, however, the histologic findings can be subtle. Objective: We sought to determine whether dermal cellularity in skin biopsy specimens from NSF cases: (1) differs significantly from that of controls; and (2) correlates with duration of the skin lesions, level of plasma creatinine, GCCA dose, or a combination of these. Methods: Seventeen NSF skin biopsy specimens and age-, sex-, and site-matched controls were retrieved from the dermatopathology files of the Massachusetts General Hospital in Boston. Dermal cellularity was manually quantified on hematoxylin-eosin-stained sections and patient medical records were reviewed for demographic and clinical data. Results: NSF cases showed a mean dermal cellularity of 70.8/high-power field (control mean: 14.4/high-power field, P < .001) and a cut-off range of 19 to 26/high-power field was established. No significant correlation was identified between dermal cellularity and demographic and clinical data. Limitations: In this retrospective analysis, duration of skin lesion was defined as the interval from most recent prior GCCA study, rather than the actual clinical onset, to time of skin biopsy, and the cumulative GCCA dose may reflect a minimum if GCCA was received at an outside institution. Conclusion: Enumeration of dermal cellularity on hematoxylin-eosin-stained sections can aid in the histologic diagnosis of NSF in the setting of chronic kidney disease and GCCA exposure and is independent of patient age, sex, plasma creatinine, time from last GCCA exposure, and GCCA dose. © 2010 by the American Academy of Dermatology, Inc.

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