Navigation Links
Drug interactions won't exclude HCV transplant or HIV co-infected patients from treatment
Date:4/19/2012

Barcelona, Spain, Thursday 19 April 2012: New data from a number of clinical trials presented for the first time at the International Liver Congress 2012 provides hope for previously difficult to treat hepatitis C (HCV) patient populations.

In the first multicentric study of the efficacy and safety of the protease inhibitors (PI) Boceprevir or Telaprevir in patients with severe HCV genotype 1 (GT1) recurrence after liver transplantation(1), results show that 57% of patients achieve undetectable hepatitis C viral loads 24 weeks after treatment (SVR24) with pegylated Interferon-alfa-2b (PegIFN-α-2b), ribavirin (RBV) and either Boceprevir or Telaprevir. Interactions between immunosuppressants and PIs were easily controlled.

Further new data shows that, in HCV GT1 and HIV co-infected patients, the addition of Boceprevir to PegIFN-α-2b and RBV results in higher rates of undetectable HCV RNA levels compared to treatment with only PegIFN-α-2b and RBV alone.(2) At the end of treatment (week 48), 63.9% of patients receiving Boceprevir, PegIFN-α-2b and RBV had undetectable HCV RNA, compared to 29.4% in the control arm. The study found the safety and tolerability profile of Boceprevir, PegIFN-α-2b and RBV was consistent with that observed in HCV-monoinfected patients.

The combination of these findings provides new hope for various difficult to treat hepatitis C populations. Professor Mark Thursz, EASL's Secretary General commented on the exciting new data: "Patients with HIV co-infection and patients who have been transplanted for HCV infection often have more aggressive disease and have been harder to treat. Worries about drug-drug interactions have caused concern about the use of protease inhibitors in these groups. The new trial data shows that the benefits of direct anti-virals can now be experienced by a wider group of patient populations."

In a study of chronic HCV GT1 patients previously unresponsive to treatment with PegIFN and RBV alone , new data shows TMC435 - an oral, once-daily, investigational HCV NS3/4A protease inhibitor - combined with PegIFN-alfa-2a and RBV achieves significantly higher SVR24 rates compared with placebo.(3) In the hardest to treat group of prior null-responders with cirrhosis, TMC435, PegIFN-alfa-2a and RBV treatment shows 61-80% SVR24 compared to 23% with placebo.

In other exciting data presented at the congress, the authors of a study on PSI-7977, a uridine nucleotide analog, propose that it may signal an end to response guided therapy in HCV GT1 patients.(4) Response-guided therapy is a paradigm for treating chronic HCV infections in which treatment decisions are based on how rapidly HCV responds to treatment.(5) With response-guided therapy, patients who rapidly clear virus from their bloodstream are eligible to receive a shorter duration of therapy, while slower responders receive standard or extended durations of therapy.(5)

In earlier studies, PSI-7977 has been associated with greater than 90% SVR (sustained virological response undetectable HCV RNA level 24 weeks after treatment) in HCV GT1, GT2, or GT3 patients, independent of predictors of poor responsiveness to interferon. In new data presented at the congress, the study authors show HCV GT1, GT4, or GT6 patients treated with PSI-7977 and PEG/RBV achieved 97% RVR (rapid virological response undetectable HCV RNA level after four weeks of treatment), with no viral breakthrough or relapse observed to date in subjects completing at least 10 weeks of PSI-7977.


'/>"/>

Contact: Travis Taylor
easlpressoffice@cohnwolfe.com
44-789-438-6428
European Association for the Study of the Liver
Source:Eurekalert

Related biology news :

1. Aiding cancer therapy by mathematically modeling tumor-immune interactions
2. Neutron scattering provides window into surface interactions
3. Interactions between substances determine allergenic potential
4. Do plants perform best with family or strangers? Researchers consider social interactions
5. Molecule serves as a key in some protein interactions
6. University of Arizona to study human-fire-climate interactions
7. Researchers provide means of monitoring cellular interactions
8. Massive Daphnia genome leads to understanding gene-environment interactions
9. Scientists identify the largest network of protein interactions related to Alzheimers disease
10. Sharks and wolves: Predator, prey interactions similar on land and in oceans
11. Gene-environmental interactions and MS progression is focus of new study
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/2/2016)... , Feb. 2, 2016 Technology Enhancements Accelerate ... an analysis of the digital and computed radiography markets ... , and Indonesia (TIM). ... and market size, as well as regional market drivers ... and discusses market penetration and market attractiveness, both for ...
(Date:2/1/2016)... Feb. 1, 2016  Wocket® smart wallet ( www.wocketwallet.com ) announces the ... Joey Fatone . Las Vegas , where ... --> Las Vegas , where Joey appeared at ... The new video ad was filmed at the Consumer Electronics Show (CES2016) ... Wocket booth to meet and greet fans. --> ...
(Date:1/22/2016)... , January 22, 2016 /PRNewswire/ ... announced the addition of the  "Global ... their offering. --> http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ... the  "Global Behavioral Biometric Market 2016-2020" ... Research and Markets ( http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... Feb. 4, 2016  Spherix Incorporated (Nasdaq: SPEX ... and monetization of intellectual property, today provided an update ... the Northern District of Texas ... Inter Partes Re-examination ("IPR") proceedings that ... The IPR was initiated on only certain claims of ...
(Date:2/3/2016)... 3, 2016   ViaCyte, Inc ., a ... pluripotent stem cell-derived islet replacement therapy for the ... today announced that ViaCyte and Janssen Biotech, Inc., ... & Johnson, have agreed to consolidate the assets ... agreement provides ViaCyte with an exclusive license to ...
(Date:2/3/2016)... NEW BRUNSWICK, N.J. , Feb. 3, 2016 ... 30 grants totaling more than $1 million for ... who are working on health-related research that demonstrates ... , this round of funding for the New ... available for faculty members at these educational institutions— ...
(Date:2/3/2016)... MEDFORD, Mass. , Feb. 3, 2016  Silk Therapeutics, ... A2 financing round. Silk Therapeutics has now raised a total ... progress made by the company. The Series A2 round was ... Foxboro, Massachusetts , with participation from new investors Lear ... Sheri and Roy P. Disney ; Richard Sackler ...
Breaking Biology Technology: