Clinical Trials


AVX754 (a New Nucleoside Reverse Transcriptase Inhibitor [NRTI]) to Treat Drug-resistant HIV

This study has been completed

Information provided by (Responsible Party)
Avexa Identifier

First received: August 3, 2005
Last updated: June 22, 2011
Last Verified: June 2011
History of Changes


The study will measure how safe and effective AVX754 (a new drug for the treatment of HIV) is in treating HIV-1 infected people who have failed treatment with lamivudine.

Condition Intervention Phase
HIV Infections

Drug : AVX754
Drug : 3TC
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Phase II, Randomised, Double-blind, Dose-ranging Study of AVX754 Versus Lamivudine in Treatment-experienced HIV-1 Infected Patients With the M184V Mutation in Reverse Transcriptase

Further study details as provided by Avexa:

Primary Outcome Measures

  • Change from baseline in HIV RNA levels at day 21 [ Time Frame: day 21 ]
  • Time-weighted average change from baseline in HIV RNA levels through 21 days [ Time Frame: 21 days ]
Secondary Outcome Measures:
  • Change from baseline in HIV RNA levels at days 7, 14, 21 [ Time Frame: days 7, 14, 21 ]
  • Proportion of subjects with HIV RNA levels <400 or <50 at days 7, 14, 21, and weeks 24 and 48 [ Time Frame: days 7, 14, 21, and weeks 24 and 48 ]
  • Change from baseline and change in ratio of CD4+ and CD8+ cells at day 21 and weeks 24 and 48 [ Time Frame: day 21 and weeks 24 and 48 ]

Enrollment: 52
Study Start Date: July 2005
Study Completion Date: January 2008
Primary Completion Date: January 2008 (Final data collection date for primary outcome measure)

Arms Assigned Interventions
Experimental: 600mg BID ATC
600mg BID ATC
Drug: AVX754

apricitabine, 600mg BID or 800mg BID

Other Name: apricitabine
Experimental: 800mg BID ATC
800mg BID ATC
Drug: AVX754

apricitabine, 600mg BID or 800mg BID

Other Name: apricitabine
Active Comparator: 150mg BID 3TC
150mg BID 3TC
Drug: 3TC

3TC, 150mg BID

Other Name: lamivudine

Detailed Description:

Lamivudine or emtricitabine are commonly used in combination with other drugs for first-line treatment of HIV infection. Although effective initially, many people later on develop resistance to some or all of the drugs (including lamivudine) leading to virological failure. Resistance is associated with characteristic mutations, which for lamivudine is the M184V mutation. A change to new, active drugs must take place when patients fail their current regime, to regain control of the virus. Although there are other types of drugs available for second line treatment, there is currently no fully active, well tolerated cytidine analogue that can replace lamivudine in a second-line regimen when patients fail first line treatment. This study will measure the efficacy and safety of AVX754 (a novel cytidine analogue with activity against HIV resistant to other nucleosides) as part of a new regimen to treat patients who have failed treatment containing lamivudine, compared to the best alternative new regimen which continues to include lamivudine.



Ages Eligible for Study: 18 Years to 65 Years  
Sexes Eligible for Study: All  
Accepts Healthy Volunteers: No  


Inclusion Criteria:

  • HIV-1 infected
  • M184V mutation in reverse transcriptase
  • Currently taking lamivudine
  • Viral load >2000 copies/ml

Exclusion Criteria:
  • Hepatitis B surface antigen positive
  • Pregnant or breastfeeding females
  • Hepatitis C RNA positive and requiring treatment

contacts and locations

Contacts and Locations

Choosing to participate in a study is an important personal decision.Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00126880


Avexa (co-ordinating sites in Australia and Argentina)
Melbourne, Victoria, Australia, 3121

Sponsors and Collaborators



Study Director: Susan W Cox, Ph D Avexa
More Information

More Information

Responsible Party: Susan Cox, Avexa Identifier: NCT00126880   History of Changes  
Other Study ID Numbers: AVX-201  
Study First Received: August 3, 2005  
Last Updated: June 22, 2011  

Keywords provided by Avexa:

Human Immunodeficiency Virus
anti-retroviral therapy
nucleoside analogue
reverse transcriptase
resistance mutation
Treatment Experienced

Additional relevant MeSH terms:
HIV Infections
Reverse Transcriptase Inhibitors processed this data on July 20, 2018
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