Phase III Confirmatory Study in Erythropoietic Protoporphyria (EPP)

Overview

Afamelanotide is a man-made drug being studied for use as a preventative medication for EPP sufferers. It is a synthetically produced analogue of human alpha melanocyte stimulating hormone (alpha-MSH) and is not yet available on the market.

The purpose of this study is to look at whether afamelanotide can reduce the number and severity of EPP symptoms when patients are exposed to light. This study will also look at how the drug is tolerated when taken by people with EPP.

The study will involve the use of an implant, which comes in the form of a small rod (approximately 2 cm x 0.15 cm) to be administered under the skin. The implant may contain the study drug afamelanotide or a placebo (inactive medication).

Over 450 subjects have been treated with afamelanotide to date with no serious safety concerns identified. For this study, afamelanotide has been formulated as a controlled release depot injection (implant). This means that the afamelanotide will be released slowly into the body over a few days. Once inserted, the implant will remain in the body after afamelanotide has been released and will slowly dissolve.

This study will help to provide more information about afamelanotide. This information will be used to determine the safety and efficacy (the ability of the drug to produce an effect) of this drug in EPP sufferers.

Up to 70 people will participate in this study from study sites across Europe.

Full Title of Study: “A Phase III, Multicentre, Double-Blind, Randomised, Placebo-Controlled Study to Confirm the Safety and Efficacy of Subcutaneous Bioresorbable Afamelanotide Implants in Patients With Erythropoietic Protoporphyria (EPP)”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Prevention
    • Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
  • Study Primary Completion Date: May 2011

Detailed Description

PURPOSE:

To determine whether afamelanotide can reduce the severity of phototoxic reactions in patients with EPP.

THEORETICAL FRAMEWORK:

EPP is a genetic photosensitivity disorder where the mainstays of management are covering up from sunlight, systemic beta carotene and the use of controlled courses of UVR treatment. One of the mechanisms for the protective effects of UVR treatment is the increase in melanin content of the skin. UVR treatment causes DNA damage to skin cells and increases the risk for skin cancers, hence it is unwise for this to be used on a recurring basis. Afamelanotide, through its ability to stimulate melanin production without causing the DNA damage associated with UVR treatment, appears to be a promising agent to combat this distressing disorder.

STUDY DESIGN:

This is a phase III, randomised, placebo controlled study to evaluate the safety and efficacy of subcutaneous implants of afamelanotide in patients suffering from EPP. The study will be performed in compliance with Good Clinical Practice (GCP) including the archiving of essential documents.

METHODOLOGY:

The target population consists of male and female participants. Up to 70 patients with diagnosed EPP (from past case history) and fulfilling the necessary inclusion/exclusion criteria will be enrolled. Potential study patients will be identified from each centre's records of patients with well characterised history (or documented diagnosis) of EPP.

Patients will be enrolled and will receive afamelanotide (16 mg implants) or placebo according to the following dosing regime:

- Group A will be administered active implants on Days 0, 60, 120, 180 and 240.

- Group B will be administered placebo implants on Days 0, 60, 120, 180 and 240.

Interventions

  • Drug: Afamelanotide
    • One 16mg subcutaneous implant every 2 months for 9 months.
  • Drug: Placebo
    • One 16mg subcutaneous implant every 2 months for 9 months.

Arms, Groups and Cohorts

  • Experimental: Afamelanotide
  • Placebo Comparator: Placebo

Clinical Trial Outcome Measures

Primary Measures

  • Severity of phototoxic reaction measured by visual analogue scale
    • Time Frame: 9 months

Secondary Measures

  • Number of phototoxic reactions
    • Time Frame: 9 months
  • Quality of life measured by patient completed questionnaire
    • Time Frame: 9 months
  • Free protoporphyrin IX level
    • Time Frame: 9 months
  • Treatment emergent adverse events
    • Time Frame: 9 months

Participating in This Clinical Trial

Inclusion Criteria

  • Male or female subjects with a diagnosis of EPP (confirmed by elevated free protoporphyrin in peripheral erythrocytes) of sufficient severity that they have requested treatment to alleviate their symptoms.
  • Aged 18 – 70 years (inclusive)
  • Written informed consent prior to the performance of any study-specific procedures.

Exclusion Criteria

  • Any allergy to afamelanotide or the polymer contained in the implant or to lignocaine or other local anaesthetic to be used during the administration of study medication.
  • EPP patients with significant hepatic involvement.
  • Personal history of melanoma or dysplastic nevus syndrome.
  • Current Bowen's disease, basal cell carcinoma, squamous cell carcinoma, or other malignant or premalignant skin lesions.
  • Any other photodermatosis such as PLE, DLE or solar urticaria.
  • Any evidence of clinically significant organ dysfunction or any clinically significant deviation from normal in the clinical or laboratory determinations.
  • Acute history of drug or alcohol abuse (in the last 12 months).
  • Patient assessed as not suitable for the study in the opinion of the Investigator (e.g. noncompliance history, allergic to local anaesthetics, faints when given injections or giving blood).
  • Female who is pregnant (confirmed by positive serum β-HCG pregnancy test prior to baseline) or lactating.
  • Females of child-bearing potential (pre-menopausal, not surgically sterile) not using adequate contraceptive measures (i.e. oral contraceptives, diaphragm plus spermicide, intrauterine device).
  • Sexually active men with partners of child bearing potential not using barrier contraception during the trial and for a period of three months thereafter.
  • Participation in a clinical trial of an investigational agent within 30 days prior to the screening visit.
  • Prior and concomitant therapy with medications which may interfere with the objectives of the study, including drugs that cause photosensitivity or skin pigmentation.

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: 70 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Clinuvel Pharmaceuticals Limited
  • Provider of Information About this Clinical Study
    • Dr Dennis Wright, Clinuvel Pharmaceuticals Limited
  • Overall Official(s)
    • Alex Anstey, MBBS, FRCP, Principal Investigator, St Woolos Hospital, Newport
    • Jorge Frank, MD, PhD, Principal Investigator, Academisch Ziekenhuis Maastricht
    • Raili Kauppinen, MD, PhD, Principal Investigator, University Central Hospital of Helsinki
    • Eric JG Sijbrands, MD, PhD, Principal Investigator, Erasmus Medical Center
    • Jean-Charles Deybach, MD. PhD, Principal Investigator, Centre Francais des Porphyries, Hopital Louis Mourier, Colombes, France
    • Sandra Hanneken, MD, Principal Investigator, Heinrich-Heine Universität, Düsseldorf, Germany
    • Gillian M Murphy, MD PhD, Principal Investigator, Beaumont Hospital, Dublin, Ireland
    • Lesley E Rhodes, MD PhD, Principal Investigator, Hope Hospital, University of Manchester, UK

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