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NCT Number: NCT00377741

A Relative Bioavailability Study of Valcyte (Valganciclovir) in Lung Transplant Recipients With or Without Cystic Fibrosis.

This study will assess the relative bioavailability of ganciclovir from the pro-drug valganciclovir in lung transplant recipients with or without cystic fibrosis. Each patient will receive 900mg valganciclovir daily for the period specified at their center, starting as soon as possible after the transplant. Pharmacokinetic assessments will be made provided that steady-state kinetics of ganciclovir and immunosuppressive drugs have been obtained (>=4 days of drug therapy). Blood samples for pharmacokinetic analysis will be taken up to 24h post-dose on one occasion. The anticipated time on study treatment is 3-12 months, and the target sample size is <100 individuals.

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Key information

Conditions

Cytomegalovirus Infections DNA Virus Infections Herpesviridae Infections Infections Virus Diseases

Age range

14 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1

Primary location

Los Angeles, California, United States

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • male or female patients, >=14 years of age;
  • first lung or heart-lung transplant recipient;
  • at risk of CMV disease (D+R-,D+R+ or D-R+);
  • estimated creatinine clearance >=60mL/min;
  • stable immunosuppressive and 900mg Valcyte dosing regimens (>=4 days) prior to pharmacokinetic assessments.

Exclusion criteria

  • history of any adverse reaction to acyclovir, valacyclovir, ganciclovir or valganciclovir;
  • evidence of graft rejection;
  • patient has received anti-CMV prophylaxis with a treatment other than cytogam, ganciclovir or valganciclovir between transplant and screening.

Treatment and study plan

valganciclovir [Valcyte]

Drug

900mg po

Primary outcomes

  1. Area Under The Observed Plasma Concentration-Time Curve Between Dosing Intervals AUC(0-tau)

    Time frame: Pre-dose, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, 8.0, 12 and 24 hours post-dose

    The area under the plasma concentration-time curve from time zero to end of dosing interval (AUC [0-tau]) is a measure of the plasma ganciclovir concentration from time zero to end of dosing interval. It was computed using the linear trapezoidal rule. The pharmacokinetic parameters of valganciclovir were measured in plasma of all participants following a single oral dose valganciclovir at 900 mg on Day 1.

  2. Maximum Observed Plasma Concentration (Cmax) of Ganciclovir

    Time frame: Pre-dose, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, 8.0, 12 and 24 hours post-dose

    The Cmax is defined as maximum observed Ganciclovir concentration. Cmax of valganciclovir were measured in plasma of all participants following a single tablet dose Valganciclovir at 900 mg at start of treatment on Day 1.

Secondary outcomes

  1. Time to Maximum Observed Plasma Concentration (Tmax) of Ganciclovir

    Time frame: Pre-dose, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, 8.0, 12 and 24 hours post-dose

    The Tmax is defined as time to reach maximum observed Ganciclovir concentration. The pharmacokinetic parameters of Valganciclovir were measured in plasma of all participants following a single tablet dose Valganciclovir at 900 mg at start of treatment on Day 1.

  2. Apparent Elimination Rate (Kelim) of Ganciclovir

    Time frame: Pre-dose, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, 8.0, 12 and 24 hours post-dose

    The apparent elimination rate is equal to the magnitude of the slope from the log-linear regression of plasma concentration versus time over the interval t to 24, where t is the first time-point used for this regression. Kelim was not reported for those participants for whom R-squared (adjusted) was lower than 0.70.

  3. Plasma Half-Life (T1/2) of Ganciclovir

    Time frame: Pre-dose, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0, 8.0, 12 and 24 hours post-dose

    Plasma half-life is the time measured for the plasma concentration to decrease by one half. The pharmacokinetic parameters of Valganciclovir were measured in plasma of all participants following a single tablet dose Valganciclovir at 900 mg at start of treatment on Day 1. T1/2 was not reported for those participants for whom R-squared (adjusted) was lower than 0.70.

Sponsors and collaborators

Lead sponsor

Hoffmann-La Roche

Industry

Registry information

Official study title

Relative Bioavailability Study of Ganciclovir From the Pro-drug, Valganciclovir, in Lung Transplant Recipients With or Without Cystic Fibrosis

Important dates

Study start
2004
Primary completion
2006
Study completion
2006
First posted
Sep 18, 2006
Registry last updated
Dec 31, 2015

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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