Jorge Ferraris
Universidad de Buenos Aires, PEDIATRIA, Faculty Member
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Base de dados : LILACS. Pesquisa : 2583 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, LILACS, seleciona. para imprimir. Fotocópia. experimental, Documentos... more
Base de dados : LILACS. Pesquisa : 2583 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, LILACS, seleciona. para imprimir. Fotocópia. experimental, Documentos relacionados. Id: 2583. ...
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Twenty three children aged 0.4 to 15 years, (x 7.5 years) with end-stage renal disease were treated with continuous ambulatory peritoneal dialysis (CAPD) over 46 months. The mean time of treatment for the group was 13 months (range 1.0 to... more
Twenty three children aged 0.4 to 15 years, (x 7.5 years) with end-stage renal disease were treated with continuous ambulatory peritoneal dialysis (CAPD) over 46 months. The mean time of treatment for the group was 13 months (range 1.0 to 31 months). Sixty five percent of the patients had readmission after catheter placement; 53% were for peritonitis. Nine out of 23 patients (39%), presented 20 episodes of peritonitis, an incidence of one episode per 15 patient months. Gram positive organisms were culture in 60% of these episodes. A total of 26 peritoneal catheters were placed in 23 patients. Of the five catheters that required replacement, three were for peritonitis. Seven out of 23 patients had nephrotic syndrome when admitted to CAPD, four of which develop peritonitis. Although no difference was seen between nephrotic and non nephrotic patients in relation to CAPD initiation and peritonitis development, nephrotic patients without peritonitis and non nephrotic had significantly higher initial growth index for height and iron binding capacity than those with nephrotic syndrome and peritonitis (-1.71 +/- 0.90 vs -2.29 +/- 0.27, P less than 0.05, and 265 +/- 50.5 vs 175 +/- 5.0 mg/dL, P less than 0.0005, respectively). No difference in mean plasma gamma globulin concentration was seen between patients with and without peritonitis. In 14 patients followed for a period greater than to 6 months, the delta growth index for weight and height and was: -0.13 +/- 0.31 and -0.31 +/- 0.46, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
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Research Interests: Pharmacology, Kidney transplantation, Treatment Outcome, Adolescent, STEROIDS, and 15 moreMedicine, Transplantation, Tacrolimus, Humans, Child, Internal Medicine, Female, Male, Pediatric, Age Factors, Body Weight, Methylprednisolone, Dosing, Mycophenolic Acid, and Paediatrics and reproductive medicine
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Studies are increasingly recognizing health‐related quality of life (HRQOL) as a key pediatric outcome in both clinical and research settings and an essential health outcome measure to assess the effectiveness of medical treatment.... more
Studies are increasingly recognizing health‐related quality of life (HRQOL) as a key pediatric outcome in both clinical and research settings and an essential health outcome measure to assess the effectiveness of medical treatment. However, it has not yet been studied among the healthy siblings of kidney transplant recipients. The aim of this study, therefore, is to examine HRQOL among this population. We asked the following three groups to complete a validated measure of HRQOL among children (KIDSCREEN‐52): siblings of children who had received kidney transplants (n = 50), kidney transplant recipients (n = 43), and a healthy control group (n = 84). We found that siblings of kidney transplant patients exhibited lower scores for financial resources and autonomy than kidney transplant recipients. They also served lower on physical well‐being, financial resources, autonomy, and parent relations/home life than the control group. However, they scored higher on social acceptance than kidn...
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Serum creatine kinase (CK) and CK isoenzymes (CK-MM, CK-MB and CK-BB) were measured in 35 healthy and 25 children with hemolytic uremic syndrome (HUS) at 48 h, 7 and 15 days after admittance. Total serum CK activity was measured with a... more
Serum creatine kinase (CK) and CK isoenzymes (CK-MM, CK-MB and CK-BB) were measured in 35 healthy and 25 children with hemolytic uremic syndrome (HUS) at 48 h, 7 and 15 days after admittance. Total serum CK activity was measured with a commercially available kit ("CK-NAC", by Merck, cat 14327) and CK isoenzymes using the Helena laboratories method. The interassay coefficients of variation with these methods are the following: for the total CK activity, 10.95 and 9.15% for an enzyme activity of 42 and 142 U/L respectively; for the activity of the isoenzymes, 6.8, 8.0 and 15.1% for activities of 102, 67 and 30 U/L. Total CK activity at 48 h in HUS patients defined two groups, group 1 (G1) which is not different from the control group (CG) and group 2 (G2) which had a significantly higher activity, p less than 0.0005. The increase in total CK remained significant until the first week. Increase in total CK resulted from the increase in CK isoenzymes: CK-MM, CK-MB and CK-BB. Hi...
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Research Interests: Adolescent, Medicine, Humans, Child, Internal Medicine, and 15 moreBlood Pressure, Female, Male, Liver Transplantation, Pediatric, Ambulatory, Outpatients, Adult, Reproducibility of Results, Ambulatory Care, Ambulatory Blood Pressure, Postoperative care, Child preschool, Diastole, and Paediatrics and reproductive medicine
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Sorbitol accumulates in renal medullary cells by synthesis from glucose in a reaction catalyzed by aldose reductase. Medullary sodium and urea are high and vary with urinary concentration. Sorbitol varies similarly, consistent with its... more
Sorbitol accumulates in renal medullary cells by synthesis from glucose in a reaction catalyzed by aldose reductase. Medullary sodium and urea are high and vary with urinary concentration. Sorbitol varies similarly, consistent with its role as a compatible intracellular organic osmolyte. We measured renal medullary sodium, urea, sorbitol, aldose reductase (protein and activity), and aldose reductase mRNA in rats treated to change medullary sodium and urea. In untreated Brattleboro rats all measurements were low and increased after 7 days of treatment with arginine vasopressin. In contrast, when normal rats were water deprived for 3 days, urea increased out of proportion to sodium, and sorbitol, aldose reductase, and aldose reductase mRNA were unchanged. After 2 h of diuresis, normal rats had lower medullary sodium and urea and reduced mRNA and sorbitol; however aldose reductase did not change. These data are consistent with previous results from cultured cells in which altered extra...
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Base de dados : ADOLEC. Pesquisa : 34807 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, ADOLEC, seleciona. para imprimir. Fotocópia. Id: 34807. Autor: Cortines... more
Base de dados : ADOLEC. Pesquisa : 34807 [Identificador único]. Referências encontradas : 1 [refinar]. Mostrando: 1 .. 1 no formato [Detalhado]. página 1 de 1, 1 / 1, ADOLEC, seleciona. para imprimir. Fotocópia. Id: 34807. Autor: Cortines ...
Low weight at birth may be due to intrauterine growth restriction or premature birth. Preterm birth is more common in low- and middle-income countries: 60% of preterm birth occur in sub-Saharan African or South Asian countries. However,... more
Low weight at birth may be due to intrauterine growth restriction or premature birth. Preterm birth is more common in low- and middle-income countries: 60% of preterm birth occur in sub-Saharan African or South Asian countries. However, in some higher-income countries, preterm birth rates appear to be increasing in relation to a reduction in the lower threshold of fetal viability. The cutoff is at 22–23 weeks, with a birth weight of approximately 500 g, although in developed countries such as Japan, the viability cutoff described is 21–22 weeks. There is evidence of the long-term consequences of prenatal programming of organ function and its relationship among adult diseases, such as hypertension (HT), central obesity, diabetes, metabolic syndrome, and chronic kidney disease (CKD). Premature delivery before the completion of nephrogenesis and intrauterine growth restriction leads to a reduction in the number of nephrons that are larger due to compensatory hyperfiltration and hypertr...
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BACKGROUND & PURPOSE It is well established that end-stage renal disease (ESRD) is associated with increased cardiovascular morbidity and mortality both in the adult and pediatric population. Although the underlying molecular... more
BACKGROUND & PURPOSE It is well established that end-stage renal disease (ESRD) is associated with increased cardiovascular morbidity and mortality both in the adult and pediatric population. Although the underlying molecular mechanisms are poorly understood, compromised nitric oxide (NO) bioactivity has been suggested as a contributing factor. With this in mind, we investigated the effects of hemodialysis on NO homeostasis and bioactivity in blood. METHODS & RESULTS Plasma and dialysate samples were obtained before and after hemodialysis sessions from adults (n = 33) and pediatric patients (n = 10) with ESRD on chronic renal replacement therapy, and from critically ill adults with acute kidney injury (n = 12) at their first sustained low-efficiency dialysis session. Levels of nitrate, nitrite, cyclic guanosine monophosphate (cGMP) and amino acids relevant for NO homeostasis were analyzed. We consistently found that nitrate and cGMP levels in plasma were significantly reduced after hemodialysis, whereas post-dialysis nitrite and amino acids coupled to NO synthase activity (i.e., arginine and citrulline) were only significantly reduced in adults with ESRD. The amount of excreted nitrate and nitrite during dialysis were similar to daily endogenous levels that would be expected from endothelial NO synthase activity. CONCLUSIONS Our results show that hemodialysis significantly reduces circulating levels of nitrate and cGMP, indicating that this medical procedure may impair NO synthesis and potentially NO signaling pathways.
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Resumo: La insuficiencia de crecimiento en talla en niños y adolescentes después del transplante renal exitoso, disminuye la autoestima y altera la rehabilitación. Los estudios sobre los patrones de crecimiento en niños que recibien... more
Resumo: La insuficiencia de crecimiento en talla en niños y adolescentes después del transplante renal exitoso, disminuye la autoestima y altera la rehabilitación. Los estudios sobre los patrones de crecimiento en niños que recibien prednisona diaria después del ...
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Nitric oxide (NO) contributes to maintaining normal cardiovascular and renal function. This bioactive signalling molecule is generally formed enzymatically by NO synthase in the vascular endothelium. NO bioactivity can also be attributed... more
Nitric oxide (NO) contributes to maintaining normal cardiovascular and renal function. This bioactive signalling molecule is generally formed enzymatically by NO synthase in the vascular endothelium. NO bioactivity can also be attributed to dietary intake of inorganic nitrate, which is abundant in our diet, especially in green leafy vegetables and beets. Ingested nitrate is reduced to nitrite by oral commensal bacteria and further to NO systemically. Previous studies have shown that dialysis, by means of removing nitrate and nitrite from the body, can reduce NO bioactivity. Hence, dietary intervention approaches aimed to boost the nitrate–nitrite–NO pathway may be of benefit in dialysis patients. The purpose of this study was to examine the kinetics of plasma nitrate and nitrite after a single intake of nitrate-rich concentrated beetroot juice (BJ) in adult hemodialysis (HD) patients and in age-matched healthy volunteers (HV). Eight HD patients and seven HV participated in this sing...
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La presion arterial (P.A.) en el sindrome de Batter (S.B.) dependeria de la accion de sustancias vasoactivas: prostaglandinas y bradiquininas que producen disminucion de la vasoconstriccion, de la P.A. y otras: angiotensina II (AII) y... more
La presion arterial (P.A.) en el sindrome de Batter (S.B.) dependeria de la accion de sustancias vasoactivas: prostaglandinas y bradiquininas que producen disminucion de la vasoconstriccion, de la P.A. y otras: angiotensina II (AII) y norepinefrina, que producen aumento de la vasoconstriccion y de la P.A. De acuerdo con este esquema, 1 mg/kg/dosis de captopril (inhibidor oral activo de la enzima convertidora de la angiotensina) causo una marcada disminucion de la P.A. y aumento en la actividad de la renina plasmatica (A.P.R.) en un paciente cono S.B. La infusion endovenosa de AII a 120 ng/kl/min., rapidamente aumento la P.A. en este paciente, a los niveles de P.A. pre-captopril. Conclusion: La hiperactividad del sistema reninaangiotensina juega un considerable papel en la regulacion de la P.A. en el S.B
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En las terapias intensivas neonatales, 1 de cada 4 pacientes tienen insuficiencia renal aguda. Las causas mas importantes son la hipoxia perinatal, la sepsis, las iatrogenicas y las cirugias (en especial, las cardiovasculares). En esta... more
En las terapias intensivas neonatales, 1 de cada 4 pacientes tienen insuficiencia renal aguda. Las causas mas importantes son la hipoxia perinatal, la sepsis, las iatrogenicas y las cirugias (en especial, las cardiovasculares). En esta revision definiremos la insuficiencia renal aguda en el recien nacido y los factores hemodinamicos que actuan sobre la funcion renal en estos pacientes. Se pondra especial enfasis en la insuficiencia renal aguda secundaria a hipoxia perinatal, en la que describiremos la fisiopatologia, la prevencion y su tratamiento.
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Eighteen records from children with renal trans- plants (RT) and classical haemolytic-uraemic syndrome (HUS) were reviewed. The mean oliguric period was 17.9 ___ 7.5 days; the interval between acute phase and end- stage renal disease... more
Eighteen records from children with renal trans- plants (RT) and classical haemolytic-uraemic syndrome (HUS) were reviewed. The mean oliguric period was 17.9 ___ 7.5 days; the interval between acute phase and end- stage renal disease (ESRD) was 9.3 + 5.2 years. HUS was the most frequent cause of renal transplantation (23.4%). There were no significant differences between patients with HUS and controls (children with RT but without HUS), regarding renal function, frequency of rejections, renal survival (HUS 65%, controls 57%) or patient survival (94.4% and 96.6%, respectively) after 9 years. None had clinical or histopathological evidence of HUS recurrence in the allograft. Of all children with living-related donors (LRD), renal survival after 3 years was longer for those who received cyclosporin A (CSA) (HUS and controls 86%) than for those who did not receive it (HUS 50%, controls 53%). Classical HUS is a frequent cause of ESRD in Argentina. The duration of the acute oliguric perio...