Treatment of Wolfram Syndrome Type 2 With the Chelator Deferiprone and Incretin Based Therapy

Hadassah Medical Center

Status and phase: Unknown; Phase 3; Phase 2

Conditions: Optic Atrophy; Diabetes Mellitus; Iron Metabolism Disorders; Platelet Dysfunction; Gastroduodenal Ulcer; Sensorineural Hearing Loss

Treatments: Drug: Deferiprone; Drug: Acetylcysteine; Drug: Sitagliptin and Metformin

Study type: Interventional

Funder types: Other

Identifiers

NCT02882477

0003-16-HMO

Details and patient eligibility

About

Patients who are genetically diagnosed with the recently reported and rare Wolfram syndrome type 2 ( WFS2) and have the degenerative and symptomatic disease including signs such as diabetes, platelet aggregation defect or visual problems will be asked to participate in this study. Knowing the pathomechanism of WFS2 with rapid cell death, after doing baseline investigations to asses the severity of their disease, the participants will be offered a chelator therapy with in addition to the antioxidant Acetylcystein, in diabetic patients an Incertin (GLP-1 ) therapy will be offered as well. The baseline investigations will be repeated after 2 months and after 5 months of therapy in order to asses the progression of the disease and to show if the chelator and anti oxidant therapy and in diabetic patients the GLP-1 therapy could stop the progression of the disease.

Full description

In WFS2 mutation the protein nutrient-deprivation autophagy factor-1(NAF-1) is affected.

Given the known result of NAF-1 protein dysfunction in animal and cultured cell line models namely a toxic accumulation of iron in the mitochondria,leading to mitochondrial destruction and oxidative stress we aim to obtain fibroblast samples from the patients and (use laboratory fibroblasts from healthy subjects as controls) These cell cultures will initially be studied for intracellular iron accumulation and then re-evaluated following treatment by Deferiprone and/or Glucagon-like peptide 1 (GLP-1) ex-vivo in the laboratory .

If repeated (n>=3) histological evidence confirms the beneficial effect of Deferiprone and/or GLP-1(incertin based therapy) in the patient's cultured fibroblasts by reversing the toxic iron accumulation in the patient's mitochondria to a normal level, he/she will be offered "in vivo" therapy using the oral chelating agent - with or without dipeptidylpeptidase-4 inhibitor (DPP-4) inhibitors or GLP-1 receptor agonists. Adding GLP-1 based therapy will depend on the diabetic status of the patient.

Prior and following 60 and 150 days of Chelator and/or GLP-1 therapy they will go through the following clinical and laboratory evaluations which will establish the baseline and post therapeutic parameters (outcome) to be compared:

detailed medical history and physical examination complete blood count (CBC) and iron levels platelet aggregation studies Fundoscopy and visual evoked potentials (VEP) Hearing evaluation Oral glucose Tolerance Test optional Intra venous glucose tolerance test (IVGTT) /glucagon/arginine test HBA1C Daily profile of blood glucose Optional CGMS ( continuous glucose monitoring system) Gastroscopy and gastric biopsy if the patient suffers from abdominal pain, hematemesis, melena or iron deficiency anemia or if peptic ulcer disease is clinically suspected.

Based on the routine use of the iron chelator, FDA approved, Deferiprone for Thalassemia (with detailed official guidelines of the Israel association for Pediatric Hematology) and for a similar subcellular iron accumulating disease - e.g. Friedreich Ataxia, we will initially use a dose of 20 mg per kilogram body weight (BW) daily divided in two equal doses. N-Acetylcystein an over the counter drug which also is an anti-oxidant will be given orally in the dose of 200mg twice daily to have a synergistic effect with Deferiprone.

In addition if they suffer from diabetes they will receive Januet (Sitagliptin/metformin) .

Enrollment: 20 estimated patients

Sex: All

Ages: 3+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Male or female patients, of any age genetically and clinically diagnosed with Wolfram syndrome type 2.

Exclusion criteria

• Patients who are non-cooperative.
• Patients with bone marrow disease or neutropenia.

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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20 participants in 2 patient groups

Deferiprone and Acetylcystein

Experimental group

Description:

PO Deferiprone 20 mg/kg divided in 2 doses PO Acetylcysteine 200 mg divided in 2 doses 5 months duration

Treatment:

Drug: Acetylcysteine

Drug: Deferiprone

Deferiprone and Acetylcystein with Sitagliptin and Metformin

Experimental group

Description:

PO Deferiprone 20 mg/kg divided in 2 doses PO Acetylcysteine 200mg divided in 2 doses PO Januet 50/500 if BW \< 30kg and 50/850 if BW\> 30kg \*2/D 5 months duration

Treatment:

Drug: Sitagliptin and Metformin

Drug: Acetylcysteine

Drug: Deferiprone