AzTrials
AzTrials

HIV InfectionNCT00113126

Staccato: A Trial of CD4 Guided Treatment Interruption, Compared to Continuous Treatment, for HIV Infection

A study testing Treatment interruption in people with HIV Infection and AIDS, run by University Hospital, Geneva at 1 site in Switzerland.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

Treatment of HIV repairs the immune system, but continuous treatment is expensive and causes side effects. Would it not be better to treat intermittently, e.g. stop treatment when the immune system has recovered, and start again only when damage reappears? That is the question which STACCATO proposes to answer. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
HIV Infection, AIDS
What is being tested?
Treatment interruption
How many people
526 participants
Where
1 siteSwitzerland
Study dates
Jan 2002to Oct 2005
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • CD4 lymphocyte count above 350/microliter and viral HIV1-RNA below 50 copies/ml on antiretroviral treatment.

Who cannot join

  • Virologic failure of treatment. Failure of treatment defined as a treatment switch motivated by high viral loads on treatment.

Trial locations and contacts

1 site in 1 country.

Switzerland1 site

  • Infectious Diseases Unit - University Hospital

    Geneva, 1205

Other trials in Switzerland

About this study

Official title: A Randomized Trial of CD4 Guided Treatment Interruption, Compared to Continuous Treatment, for HIV Infection

Treatment of HIV repairs the immune system, but continuous treatment is expensive and causes side effects. Would it not be better to treat intermittently, e.g. stop treatment when the immune system has recovered, and start again only when damage reappears? That is the question which STACCATO proposes to answer.

Approximately 500 patients were recruited for this trial from 2002 to 2004. One third were treated continuously; in two thirds, the treatment was interrupted whenever the CD4 count, a measure of immune recovery, exceeded 350. At the end of 2005, the two treatment groups will be compared in order to see which fared better regarding amount of drugs used, side effects, CD4 counts, and development of resistance to treatment.

Read the detailed description

Continuous treatment has been very successful in diminishing the diseases and deaths caused by HIV. However, continuous treatment is expensive. Intermittent treatment will always cost less than continuous treatment, and therefore has the potential to facilitate access to highly active antiretroviral therapy (HAART) in developing countries. HAART also causes many undesirable effects. Intermittent treatment decreases exposure to drugs and is therefore expected to decrease side effects.

STACCATO is a randomised trial of intermittent versus continuous anti-retroviral treatment. At least 600 patients on HAART, with viremia below 50 copies/ml and CD4 count above 350 cells/ml were randomised to one of two arms, in 1:2 proportions:

  • Arm 1: Continuation (control) arm: Drugs are continued or changed according to current guidelines and good clinical practice.
  • Arm 2: CD4-guided arm: Drugs discontinued and reintroduced according to CD4 counts, with HAART being administered only if CD4 count is < 350 cells/ml.

Randomized treatment will continue during an average of approximately 2 years, and will be followed by a period of 12 to 24 weeks' continuous treatment, for patients in both arms.

Endpoints: The amount of drugs used, side effects, viremia and CD4 counts, number of clinical events, at the end of the randomized treatment period, and again 12 to 24 weeks later. A subproject will study the effect of treatment interruption on resistance development, mutations in proviral DNA and proviral DNA levels.

Conditions
HIV Infection, AIDS
Being tested
Treatment interruption
Keywords
Scheduled treatment interruptions, STI
Medical subject headings
HIV Infections, Acquired Immunodeficiency Syndrome, Sexually Transmitted Diseases

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Treatment interruptionDrug

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Amounts of drugs used

  2. Response of viral load to retreatment after interruption

Secondary outcomes (4)

  1. Opportunistic infections and deaths

  2. Adverse effects

  3. CD4 counts

  4. Resistance development

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted6 Jun 2005 (estimated)
  2. Study startJan 2002
  3. Study completionOct 2005

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
526 participants
IDs, dates and publications
ClinicalTrials.gov ID
NCT00113126
Sponsor's protocol ID
SHCS # 356
Status last verified
Jun 2005
First submitted
3 Jun 2005
Last updated
29 Nov 2006
Results posted
No

Publications

  • Ananworanich J, Nuesch R, Le Braz M, Chetchotisakd P, Vibhagool A, Wicharuk S, Ruxrungtham K, Furrer H, Cooper D, Hirschel B, Bernasconi E, Cavassini M, Ebnother C, Fagard C, Genne D, Khanna N, Perrin L, Phanupak P, Ubolyam S, Vernazza P, Yerly S; Swiss HIV Cohort Study. Failures of 1 week on, 1 week off antiretroviral therapies in a randomized trial. AIDS. 2003 Oct 17;17(15):F33-7. doi: 10.1097/00002030-200310170-00001.

    PubMed 14523294

  • Ananworanich J, Gayet-Ageron A, Le Braz M, Prasithsirikul W, Chetchotisakd P, Kiertiburanakul S, Munsakul W, Raksakulkarn P, Tansuphasawasdikul S, Sirivichayakul S, Cavassini M, Karrer U, Genne D, Nuesch R, Vernazza P, Bernasconi E, Leduc D, Satchell C, Yerly S, Perrin L, Hill A, Perneger T, Phanuphak P, Furrer H, Cooper D, Ruxrungtham K, Hirschel B; Staccato Study Group; Swiss HIV Cohort Study. CD4-guided scheduled treatment interruptions compared with continuous therapy for patients infected with HIV-1: results of the Staccato randomised trial. Lancet. 2006 Aug 5;368(9534):459-65. doi: 10.1016/S0140-6736(06)69153-8.

    PubMed 16890832

  • Calmy A, Gayet-Ageron A, Montecucco F, Nguyen A, Mach F, Burger F, Ubolyam S, Carr A, Ruxungtham K, Hirschel B, Ananworanich J; STACCATO Study Group. HIV increases markers of cardiovascular risk: results from a randomized, treatment interruption trial. AIDS. 2009 May 15;23(8):929-39. doi: 10.1097/qad.0b013e32832995fa.

    PubMed 19425222

  • Ananworanich J, Nuesch R, Cote HC, Kerr SJ, Hill A, Jupimai T, Laopraynak N, Saenawat S, Ruxrungtham K, Hirschel B. Changes in metabolic toxicity after switching from stavudine/didanosine to tenofovir/lamivudine--a Staccato trial substudy. J Antimicrob Chemother. 2008 Jun;61(6):1340-3. doi: 10.1093/jac/dkn097. Epub 2008 Mar 12.

    PubMed 18339636

Questions about this trial

What is this clinical trial studying?

A study testing Treatment interruption in people with HIV Infection and AIDS, run by University Hospital, Geneva at 1 site in Switzerland.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 29 Nov 2006. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Switzerland. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Amounts of drugs used. The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00113126, which also lists 4 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Nov 2006.

AzTrials uses cookies for analytics and advertising. You can accept or reject them; the site works either way. Privacy Policy.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in