Pharmacokinetics of 9-cis-retinoic Acid (Alitretinoin, Toctino®) in Patients With Hepatic Disease

Study Overview
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Brief Summary
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This study aims to investigate whether liver patients may tolerate alitretinoin by comparing metabolism in 8 such patients with the metabolism in 8 healthy controls

Detailed Description
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This study aims to investigate whether liver patients may tolerate alitretinoin. Toctino (alitretinoin) is a vitamin A like substance that has proven effective in the treatment of specially hand eczema. The medicine is taken as capsules daily for up to 3 months. Toctino is currently only approved for patients with normal liver function, because it has never been studied how drug metabolism and excretion occurs in liver disease patients. This, however, the investigators want to examine in order to achieve an additional treatment for patients with severe hand eczema and concomitant liver disease. The study is a collaboration between dermatology and medical department, Gentofte Hospital and University of Copenhagen, where blood and urine tests will be conducted. From the medical department, 8 patients diagnosed with liver disease will be recruited. Patients should only receive a single dose of Toctino (30 mg capsules). 20 blood samples and one urine sample will be taken over the next 24 hours (approximately 250-300 ml) to measure the concentration of Toctino in blood and urine. Moreover, the urine will be collected over 24 hours. Then the investigators will recruit an 8-person control group that is matched according to gender, age and weight. In this control group will take exactly the same samples. Based on determining concentrations in blood and urine will be able to mathematically calculate how Toctino is absorbed, distributed and excreted in liver disease patients in conjunction with a healthy control group. The study will therefore help to determine what dose of Toctino that would be preferable in liver disease patients. The survey is estimated to be associated with a very low risk both for participating patients and control group. Toctino is an approved drug and side effects occur almost exclusively in long term treatment.

Official Title
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Pharmacokinetics of 9-cis-retinoic Acid (Alitretinoin, Toctino®) in Patients

Conditions
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Hepatic Insufficiency

Intervention / Treatment
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* Drug: Alitretinoin


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Be medically stable for at least 1 month before the intake of 9-cis-RA. There must be an ultrasound scan of liver and abdomen within the last 3 months (liver size, ascites). In women of childbearing age, there must be a negative pregnancy test, while that to be used adequate contraception (the pill, coil or surgical sterilization) at least 1 month after taking the study medication. Exclusion Criteria: Clinically significant deviations in routine blood tests (hematology, electrolytes and kid-ney, urinalysis). Differences attributable to underlying liver disease are excluded. Encephalopathy (> grade II) Concomitant treatment with drugs predominantly metabolised in the liver by CYP3A4. Clinically significant ECG changes, cardiovascular disease and AMI within the last 12 months Affected renal function judged by Cockcroft-Gault formula. Epilepsy or significant neurological disease that requires drug therapy. History of cerebrovascular relapse Esophagus bleeding Severe ascites HIV Mental illness. Active cancer Pregnancy or pregnancy plan within 3 months. Breastfeeding women. Participation in other clinical projects. Intake of clinical trial medication in the past month.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Alitretinoin - Hepatic Insufficiency<br>metabolism of 30 mg alitretinoin single dose in 8 patients with Hepatic Insufficiency | Drug: Alitretinoin<br>* 30 mg capsule of 9-cis-retinoic-acid (9-cis-RA)(Alitretinoin, Toctino®)<br>* Other names: 9-cis-retinoic-acid (9-cis-RA)(Alitretinoin, Toctino®);|
| Experimental: Alitretinoin - Hepatic Insufficiency Controls<br>metabolism of 30 mg alitretinoin single dose in 8 healthy controls. | Drug: Alitretinoin<br>* 30 mg capsule of 9-cis-retinoic-acid (9-cis-RA)(Alitretinoin, Toctino®)<br>* Other names: 9-cis-retinoic-acid (9-cis-RA)(Alitretinoin, Toctino®);|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The investigators wish to investigate whether the metabolism of alitretinoin differs between healthy controls and patients with moderate to severe hepatic disease | The metabolism of alitretinoin will be examined by measuring blood concentrations after time: 0 , ¼, ½, ¾, 1, 1¼, 1½, 2, 2½, 3, 3½, 4, 5, 6, 8, 10, 12 and 24 hours. | 2 years |