Clinical trial NCT03962114: Effects of Vitamin B3 in Patients With Ataxia Telangiectasia
Official title: Effects of Nicotinamide Riboside (Vitamin B3) in Patients With Ataxia Telangiectasia.
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE2
Conditions: Ataxia Telangiectasia
ATM Gene Mutation
Keywords: Ataxia Telangiectasia
ATM Gene Mutation
ATM protein
Nicotinamide riboside
Lead sponsor: Radboud University Medical Center
Sponsor class: OTHER
Collaborators: name: A-T Children's Project
name: Twan foundation (https://twanfoundation.nl)
First posted: 2019-05-23
Enrollment: 24
Sex: ALL
Minimum age (years): 2
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Intervention model description: Open label proof of concept study
Primary purpose: TREATMENT

Brief summary: This clinical trial investigates the effects of nicotinamide riboside (vitamin B3) on the disease course of patients with ataxia telangiectasia.

Patients will be treated during four consecutive months with nicotinamide riboside (25mg/kg/day), followed by a washout period of two months.

Main study parameters/endpoints: Ataxia, dysarthria, quality of life, laboratory parameters.

Detailed description: Rationale: Ataxia Telangiectasia (A-T) is an autosomal recessively inherited neurodegenerative disorder, with a high cancer risk, that also affects the immune and respiratory system. Therapy for A-T is restricted to symptomatic treatment including rehabilitation care, combined with infection prevention and treatment, and screening for pulmonary dysfunction and malignancies. A-T is caused by mutations in the ATM gene. The ATM protein plays a pivotal role in more than 100 different biochemical processes, among which cellular energy metabolism, cell signaling, and DNA repair. Nicotinamide adenine dinucleotide (NAD+) is an essential molecule in many of these processes and studies have shown that NAD+ deficiency plays a role in disease mechanisms underlying DNA repair disorders such as A-T. NAD+ is available in food, but can also be synthesized in the body from its precursors nicotinamide, nicotinic acid, and nicotinamide riboside (NR), as a group called "vitamin B3". Treatment of experimental A-T animal models with NR showed beneficial effects. The aim of this study is to investigate whether treatment with NR during a period of six months may have positive effects on the disease course of patients with A-T.

Objective: To investigate the effects of NR on the disease course of patients with ataxia telangiectasia.

Study design: Single center, interventional, explorative, open-label proof of concept study.

Study population: Patients with A-T (age \>2 years).

Intervention (if applicable): Patients will be treated with nicotinamide riboside (25mg/kg/day), during four consecutive months, followed by a washout period of two months.

Main study parameters/endpoints: Ataxia, dysarthria, quality of life, laboratory parameters.

Eligibility criteria: Inclusion Criteria:

* A-T patients who visit our outpatient clinic.
* Genetically confirmed diagnosis of A-T by the identification of pathogenic mutations of the ATM gene.
* Age ≥ 2 years or older and bodyweight ≥ 12 Kg.
* Informed consent.

Exclusion Criteria:

* Additional medical condition or illness that impair the patient's ability to participate in the study (e.g. actual treatment of a malignancy, active infection, poorly controlled diabetes mellitus, hypertension, organ failure, clinically significant hematological or biochemical abnormalities different from the usual abnormalities in A-T)
* Elevated serum transaminases (\> 2 times upper limit of normal)
* Participation in another interventional study at start of the study or during the study
* Pregnancy.
* Breast feeding.

Primary outcomes:
measure: Ataxia, SARA (Scale of the assesment and rating of ataxia)
timeFrame: change from baseline -1 month - 4 months - 6 months
measure: Ataxia, ICARS (International Cooperative Ataxia Rating Scale)
timeFrame: change from baseline -1 month - 4 months - 6 months
measure: Ataxia, 9-hole pegboard test.
timeFrame: change from baseline -1 month - 4 months - 6 months
measure: Dysarthria, Radboud dysarthria assesment (RDA)
timeFrame: change from baseline -1 month - 4 months - 6 months
Secondary outcomes:
measure: Quality of life questionnaire EuroQoL 5 Dimensions 5 Levels (EQ-5D-5L)
timeFrame: change from baseline -1 month - 4 months - 6 months
measure: Laboratory measurements
timeFrame: change from baseline -1 month - 4 months - 6 months
measure: Intelligibility, Intelligibility in Context Scale (ICS)
timeFrame: change from baseline -1 month - 4 months - 6 months
measure: Fatigue, Visual Analogous Scale (VAS)
timeFrame: change from baseline -1 month - 4 months - 6 months
Other outcomes:
Locations:
city: Nijmegen
country: Netherlands
facility: Radboudumc
Study officials:
affiliation: michel.willemsen@radboudumc.nl
name: Michel Willemsen, Prof.
role: PRINCIPAL_INVESTIGATOR
References: