Systemic Exposure of Catechins From Veregen 15% Ointment in Patients With External Anogenital Warts and From Oral Intake of Green Tea Beverage in Healthy Volunteers
Investigation of systemic catechin exposure following topically administered Veregen® 15% ointment in patients with external genital and perianal warts and following oral intake of a standardized green tea beverage in healthy subjects.
Pharmacokinetic parameters for the main catechin EGCg used as a marker of overall catechin exposure following dermal administration in the patient group will only be calculated if sufficiently consistent data can be obtained e.g. sufficient plasma catechin concentrations to pharmacokinetically evaluate plasma profiles for plasma catechin concentrations.
If applicable, a safety margin for ointment use might need to be established with respect to intolerable systemic exposures of catechins following application of Veregen® ointment.
In treatment arm 1, patients with anogenital warts will apply Veregen® 15% ointment 250 mg three times daily: in the morning, at midday, and in the evening on the defined anogenital administration area (total dose of 750 mg/d) for one week .
In treatment arm 2, healthy subjects will ingest 500 mL commercially available green tea beverage ("Lipton® Green Limone" distributed by PepsiCo Deutschland GmbH, Neu-Isenburg, Germany), three times daily in the morning, at midday, and in the evening (total dose of 1500 mL/d) for one week.
Plasma samples will be collected to aim for a complete pharmacokinetic assessment (over 24 hours) on Days 1 and 2 at Visit 2 and on Days 7 and 8 at Visit 3 (one week after first dosing).
To avoid any influence on overall systemic catechin exposure deriving from any other source than Veregen® or Lipton Green Tea, all subjects participating in the trial (patients and healthy volunteers) will be asked to follow a defined diet abstaining from food or beverages known to containing catechins (a list of all prohibited and allowed foods and beverages will be provided to all subjects).
For concomitant medication, only paracetamol and oral contraceptives are allowed.
|Study Design:||Allocation: Non-Randomized
Endpoint Classification: Bio-availability Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||An Open-label, Single-center Triqal to Evaluate Systemic Exposure of Catechins From Commercially Available, Topically Applied Veregen 15% Ointment in Patients With External Anogenital Warts and From Oral Intake of Green Tea Beverage in Healthy Volunteers|
- Systemic exposure of green tea catechin EGC [ Time Frame: At time points 0, i.e. prior to the morning ingestion of 500 mL of commercial green tea beverage or the morning application of 250 mg Veregen® 15%, and 0.5, 1, 2, 4, 6, 8, 10, 12, 14, and 24 hours afterwards. ] [ Designated as safety issue: No ]
The primary objective of this trial is to investigate the systemic exposure, and, if possible, the plasma concentrations and pharmacokinetics of green tea catechin EGCg after topically applied Veregen® 15% ointment in patients with external genital warts and that following oral intake of commercially available green tea beverage by healthy subjects.
On the sampling Days 1/2 and 7/8, blood samples of 3 mL each will be collected (non-fasting condition) at specified time points (see above)
|Study Start Date:||December 2011|
|Study Completion Date:||March 2012|
|Primary Completion Date:||March 2012 (Final data collection date for primary outcome measure)|
Veregen® (sinecatechins) Ointment, 15%, local application of 250 mg corresponding to 0.5 cm strand of ointment, 3 times daily (total dose of 750 mg/d)
Patients in treatment arm 1 will apply Veregen® 15% ointment (approved commercial source in US) in a total of 750 mg/day for one week, corresponding to application of maximal about 106,9 mg catechins/d, thereof maximal 81 mg ECGg per day). Patients will be instructed to apply fix portions of 250 mg three times daily on the defined anogenital administration area.
Active Comparator: Tea
"Lipton® Green Limone", a green tea beverage; oral intake of 500 mL green tea, 3 times daily (total dose on 1500 mL/d)
Other: Green Tea
Healthy volunteers in treatment arm 2 will drink "Lipton® Green Limone" in a total of 1500 mL/d for one week, in portions of 500 mL three times daily after the meals