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Purpose: The study of online hemodiafiltration (HDF) benefits over high-flux hemodialysis (HD) raises great interest. The purpose was to compare clinical and laboratory parameters in patients treated with HD who were switched to HDF., Methods: Forty-eight HD patients (study group) were switched to HDF, while other 521 patients remained on HD as a control group. During last 6 HD months and during first year of HDF, we determined in both groups the following parameters: monthly-weekly dialysis time, systolic and diastolic blood pressure, body mass index (BMI), interdialytic body weight gain (IBWG), blood flow rate (Qb), weekly erythropoietin-stimulating agents dose (EPO), single-pool Kt/V, calcium, phosphorus (P), hemoglobin and normalized protein catabolic ration (nPCR), plus every 3 months--albumin, parathormone (PTH), ferritin and transferrin saturation (TSAT). In both groups, parameters in the last 6 HD months were compared to those in the first 6 months and, respectively, to those in the first year of HDF., Results: In the study group, albumin and nPCR were significantly higher in the HD period not only compared to the first 6 months of HDF, but also compared to the first year of HDF. IBWG and P were higher with HD compared to the first year of HDF, but not with the first 6 months. PTH, Kt/V, Qb and EPO were higher in both HDF periods. In the control group, albumin was significantly higher in the first 6 months after the switch, but it was significantly lower in the first year. BMI, ferritin, PTH, Kt/V, Qb, TSAT and weekly dialysis time were higher in both HDF periods, while nPCR, EPO, SBP and DBP were lower. IBWG and Hb rose only during the first year after the switch, while P was lower in the first year, but not in the first 6 months., Conclusions: Nutrition, assessed by albumin, nPCR and BMI, was not improved by HDF compared to HD. With HDF, Kt/V and phosphorus control were better, similar results were observed in the control group. A larger EPO dose was needed with HDF for maintaining a similar hemoglobin level.

Background: Hepatitis C virus (HCV) infection rates are still high in hemodialysis (HD) centers in developing countries. Standard interferon (IFN) monotherapy is associated with good results in HCV-positive patients (more than 30% rate of sustained virological response) but with poor tolerance. Pegylated interferon (PEG-IFN) is better tolerated and has a more sustained antiviral effect in the general population. There have been no large trials to date with PEG-IFN in hemodialysis populations., Methods: We report the largest series to date of HCV+ HD patients (n=78) treated with PEG-IFN alfa -2a 135 microg s.c. weekly monotherapy. The primary outcomes were (a) efficacy - assessed by the viral response at 12, 48 weeks and 6 months after completion of therapy, and (b) rate of serious adverse events., Results: In 48/78 (61.5%) patients an early (12 weeks) viral response was obtained. Viral end-of-treatment response (ETR) was evaluated in the 21 patients (26.9%) who reached week 48 on therapy: only 15 subjects (19.2% of the initial population) had undetectable HCV-RNA levels. In these 15 patients, a sustained viral response (SVR) was recorded in 11 - i.e. 14.1% of the initial intention-to-treat (ITT) population. A high prevalence of noncompliance (32%) and of adverse events (83%) was recorded; minor adverse effects (flu-like syndrome, mild-to-moderate thrombocytopenia, leukopenia and anemia) responded to symptomatic therapy or dose reduction, but often caused lack of compliance. The incidence rate of serious adverse events was 0.19/patient-year (median time to event 20.5 weeks), and incidence of deaths was 0.11/patient-year., Conclusions: In dialysis patients, PEG-IFN alfa -2a is poorly tolerated and associated with a high number of serious adverse events, causing a significant lack of compliance/discontinuation of therapy. In this largest HCV-positive hemodialysis population survey, we report a low sustained viral response in an ITT analysis, compared with previously published historical data using non-PEG-IFN, a low compliance rate and an unsatisfactory overall safety profile, not supporting the superiority of PEG-IFN monotherapy.

Aim: To evaluate the response to pegylated-interferon alpha 2a in chronic hepatitis C patients on chronic haemodialysis., Methods: Ten patients with chronic C hepatitis were enrolled in this study. All had increased aminotransferases for more than 6 mo, positive antiHCV antibodies and positive PCR HCV-RNA. We administrated Peg-Interferon alpha 2a 180 microg/wk for 48 wk. After 12 wk of treatment we evaluated the biochemical and early virological response (EVR). At the end of the treatment we evaluated the biochemical response and 24 wk after the end of the treatment we evaluated the sustained virological response (SVR). We monitored the side-effects during the treatment., Results: Two patients dropped out in the first 12 wk of treatment and 2 after the first 12 wk of treatment. After 12 wk of treatment, 7 out of 8 patients had biochemical response and EVR and 1 had biochemical response but persistent viremia. We had to reduce the dose of pegylated-interferon to 135 mug/wk in 2 cases. Three out of 6 (50%) patients had SVR 24 wk after the end of the treatment. Intention-to-treat analysis showed that 3 out of 10 patients (30%) had SVR. Side-effects occurred in most of the patients (flu-like syndrome, thrombocytopenia or leucopoenia), but they did not impose the discontinuation of treatment., Conclusion: After 12 wk of treatment with Peg-Interferon alpha 2a (40 ku) in patients on chronic haemodialysis with chronic C hepatitis, EVR was obtained in 87.5% (7/8) of the cases. SVR was achieved in 50% of the cases (3/6 patients) that finished the 48 wk of treatment.

The aim of the study was to evaluate the response to Pegylated Interferon alpha2a (40 kDa) in patients on chronic haemodialysis with chronic C hepatitis. 10 patients were enrolled in this study (4 males and 6 females). All had increased aminotransferases, anti HCV antibodies and PCR HCV-RNA positive. We administrated Peg-Interferon alpha2a 180 microg/week for 48 weeks. One patient was excluded from the study because of lack of compliance. We had to stop the treatment in one patient due to complications after surgery. After 12 weeks of treatment we evaluated the biochemical and virological response. We continued with Peg-Interferon until 48 weeks. Six patients finished the treatment. After 12 weeks of treatment with Peg-Interferon alpha 2a (40 kDa) in patients on chronic haemodialysis with chronic C hepatitis, the virological response (HCV-RNA absent by PCR) was obtained in 87.5% (7/8) of the cases. All patients who finished the 48 weeks of treatment had normal transaminases (biochemical response) (6/6). We had to reduce the dose of Peg-Interferon in only 2 cases. Even if side-effects occurred in most of the patients (flu-like syndrome, thrombocytopenia or leucopenia) they did not impose the discontinuation of treatment. The sustained response will be established by determining PCR RNA-HCV 6 months after the end of the treatment.