Hepatitis C Treatment in Dialysis Patients: Is a New Dawn Approaching?

Treatment of Chronic Hepatitis C Infection Among Egyptian Kidney Transplant Recipients: A Pilot Study

OBJECTIVES

Chronic hepatitis C infection incidence and prevalence are high in Egypt and represent a major health burden. Hepatitis C virus infection can affect graft outcomes in kidney transplant recipients. Treatment of hepatitis C virus infection among this special group was difficult during the interferon era; however, with advances in direct-acting antivirals, treatment outcomes have become more promising.

MATERIALS AND METHODS

This is a pilot, observational, single-center, one arm study that included 50 kidney transplant recipients seen at the Mansoura (Egypt) Urology and Nephrology Center. Patients were consented to receive a sofosbuvir-based regimen as all had creatinine clearance of greater than 30 mL/min/1.73 m2.

RESULTS

All patients achieved rapid virologic responses 4 weeks after starting treatment. Forty-nine of 50 patients achieved 12-week and 24-week sustained viral responses. Six patients had increased serum creatinine levels. Four graft biopsies were performed. Anemia was the most common adverse effect among the patients who were maintained on ribavirin.

CONCLUSIONS

Treatment of chronic hepatitis C infection has become easier and safe with the advance of new direct-acting antivirals.

An update on the management of hepatitis C virus-infected patients with stage 4-5 chronic kidney disease while awaiting the revised KDIGO Guidelines

The treatment of hepatitis C virus (HCV) infection has progressed markedly over the last 2 decades, with a dramatic acceleration the last 3 years. The combination of two or three direct-acting antiviral drugs (DAAs) targeting viral proteins [NS3/4A protease inhibitors, NS5B nucleos(t)idic and non-nucleos(t)idic polymerase inhibitors, NS5A replication complex inhibitors], with or without ribavirin but without interferon (interferon-free regimen), for 8-24 weeks, achieved high sustained virological response (>90%), whatever fibrosis stage, genotype and subtype, baseline viral load, prior therapeutic history of the patient (naïve or experienced) and pre-existing resistance-associated variants with a fair tolerance and reduced pill burden. International guidelines recommend to ideally treat all infected patients even if a prioritization of the most severe patients (extensive fibrosis or cirrhosis, symptomatic cryoglobulinaemic vasculitis…) appears to be the best cost-effective and urgent policy. Patients with stage 4-5 chronic kidney disease (CKD) have to be considered as priority patients. Updating of the Kidney Disease: Improving Global Outcomes recommendations is due to start soon, but awaiting their availability, we present here an overview of recent developments in the field.

Successful Treatment of Chronic Hepatitis C Virus Infection With Sofosbuvir and Ledipasvir in Renal Transplant Recipients

BACKGROUND

Treatment of chronic hepatitis C virus (HCV) infection after renal allograft transplantation has been an obstacle because of contraindications associated with IFN-based therapies. Direct-acting antiviral agents are highly efficient treatment options that do not require IFN and may not require ribavirin. Therefore, we assessed the efficacy and safety of sofosbuvir and ledipasvir in renal transplant patients with chronic HCV infection.

METHODS

Fifteen renal allograft recipients with therapy-naive HCV genotype (GT) 1a, 1b, or 4 were treated with the combination of sofosbuvir and ledipasvir without ribavirin for 8 or 12 weeks. Clinical data were retrospectively analyzed for viral kinetics and for renal and liver function parameters. Patients were closely monitored for trough levels of immunosuppressive agents, laboratory values, and potential adverse effects.

RESULTS

Ten patients (66%) exhibited a rapid virologic response within 4 weeks (HCV GT1a, n = 4; HCV GT1b, n = 6). The other 5 patients exhibited a virologic response within 8 (HCV GT 1b, n = 4) or 12 weeks (HCV GT4, n = 1). One hundred percent of patients exhibited sustained virologic response at week 12 after the end of treatment. Clinical measures of liver function improved substantially for all patients. Adverse events were scarce; renal transplant function and proteinuria remained stable. Importantly, dose adjustments for tacrolimus were necessary for maintaining sufficient trough levels.

CONCLUSIONS

The described regimen appears to be safe and effective for patients after renal transplant and is a promising treatment regimen for eradicating HCV in this patient population.

Epidemiology update for hepatitis C virus and hepatitis B virus in end-stage renal disease in France

BACKGROUND & AIMS

Risk for HCV/HBV infection is increased in end-stage renal disease patients. We generate updated epidemiological data.

METHODS

Based on the National French registry for end-stage renal disease patients, we extracted data for patients who started dialysis or pre-emptive transplantation between January 2005 and December 2013. A positive serum HBs Ag and/or a positive HCV RNA defined HBV and HCV infections, respectively.

RESULTS

In all, 72 948 patients were included among which 62.5% were men. At inclusion, 615 patients were HBV+ and 1026 HCV+. The prevalence of HBV and HCV infections were 0.84% (95% PI: 0.78-0.91) and 1.41% (95% PI: 1.32-1.49), respectively. The prevalence of HBV infection by age group increased progressively until a maximum rate at 1.80% (95% PI: 1.46-2.20) in the 4th decade, then regularly decreased. Same profile was observed for HCV prevalence, with a maximum rate at 3.14% (95% PI: 2.68-3.65) in the 4th decade. During the follow-up, we identified new HBV or HCV infections in 117 and 81 patients, respectively, with an overall incidence of 0.076% (95% PI: 0.062-0.090) and 0.053% (95%PI: 0.041-0.065) between 2005 and 2013, respectively. During the first dialysis year, HBV incidence was 0.35% (95% PI: 0.28-0.43) and that of HCV 0.21% (95% PI: 0.16-0.28).

CONCLUSION

Our data highlight the need for HCV therapy for more than 1000 end-stage renal disease patients in France, sustained systematic immunization campaigns (HBV) and underlines the persistence of HBV/HCV new hand-borne nosocomial cases.

HCV and the kidney

Chronic hepatitis C (CHC) is significantly associated with a risk of renal deterioration over time. Renal impairment, especially stage 4-5 chronic kidney disease, increases the risk of: (i) the prevalence and incidence (in dialysis/transplantation) of hepatitis C virus (HCV) infection; (ii) liver deterioration during kidney transplantation and (iii) allograft failure and patient mortality. HCV-infected dialysis patients have a higher mortality than non-infected dialysis patients and than HCV-infected kidney recipients. The harmful impact of HCV emphasizes the need for oral antiviral therapies in patients with chronic kidney disease. Symptomatic cryoglobulinemic vasculitis and extensive liver fibrosis are already approved indications for early access to oral antiviral treatment. Patients with stage 4-5 chronic kidney disease should also be given priority: dialysis patients (whatever the stage of fibrosis and whether or not they are candidates for kidney transplantation) as well as all kidney recipients. The results of treatment of HCV with direct-acting antiviral (DAAs) drugs in patients with late chronic kidney disease are excellent, similar to those in the general population, although additional clinical trials are definitely needed, particularly to optimize adjustment of treatment to kidney function and determine the risk of drug-drug interactions.

Does hepatitis B virus coinfection have any impact on treatment outcome in hepatitis C patients on hemodialysis?

BACKGROUND

HBV/HCV coinfection is a common finding among hemodialysis patients. However, there is scarce information concerning the impact of HBV coinfection on the response to treatment of HCV-infected patients on hemodialysis.

AIM

We aimed to compare the rate of sustained virologic response (SVR) to treatment with interferon-alfa (IFN) between hemodialysis patients with HBV/HCV coinfection and those with HCV-monoinfection.

MATERIAL AND METHODS

HCV-infected patients on hemodialysis treated with IFN were included. Patients coinfected by HBV/HCV were compared to HCV-monoinfected patients, regarding clinical and biochemical features and rates of SVR.

RESULTS

One hundred and eleven patients were treated. HBV/HCV coinfection was observed in 18/111 patients (16%). Coinfected patients were younger (p = 002), had more time on dialysis (p = 0.05) and showed a tendency to present a higher prevalence of septal fibrosis (p = 0.06). The analysis by intention to treat showed SVR of 56% among coinfected patients and 18% in HCV-monoinfected patients (p = 0.004).

CONCLUSION

In conclusion, end-stage renal disease patients with HBV/HCV coinfection exhibit higher rate of SVR to HCV treatment than HCV-monoinfected patients. It is possible that factors related to the host immune response and viral interaction could explain the better response observed among coinfected patients.