Ascorbic Acid Treatment in Congenital Glucocorticoids and Mineralocorticoids Deficiency Due to NNT Mutation

Ascorbic Acid Treatment for Patients With Combined Mineralocorticoid and Glucocorticoid Deficiency Secondary to Nicotinamide Nucleotide Transhydrogenase Mutation

Nicotinamide nucleotide transhydrogenase (NNT) mutations cause glucocorticoid and mineralocorticoid deficiencies through decreased detoxification of reactive oxygen species (ROS) in adrenocortical cells.

Ascorbic acid is well known by its high antioxidant activity due to the neutralization of free radicals and other reactive oxygen species.

Preliminary results of NNT_p.G200S homozygous fibroblasts' treatment with 10 micro molar L-ascorbic acid shows significant improvement in mitochondrial morphology and in ROS content.

The aim of this study is to figure out if ascorbic acid treatment improves the phenotype of NNT patients by reducing ROS in their adrenocortical cells and preventing their apoptosis.

Study Overview

• Status: Unknown
• Conditions: Glucocorticoids Deficiency
• Intervention / Treatment: Drug: Ascorbic Acid

Detailed Description

Most cases of familial glucocorticoid and mineralocorticoid deficiency are caused by mutations interrupting steroidogenesis such as 21- hydroxylase deficiency. Recently, nicotinamide nucleotide transhydrogenase (NNT) mutations were found to cause isolated glucocorticoid deficiency or combined mineralocorticoid and glucocorticoid deficiency through decreased detoxification of reactive oxygen species (ROS) in adrenocortical cells.

NNT mutation in mice causes also glucose intolerance. Ascorbic acid is an essential water-soluble vitamin with excellent reducing properties, well known by its high antioxidant activity due to the neutralization of free radicals and other reactive oxygen species. This vitamin acts as the first line of defense during oxidative stress in the human body.

Ascorbic acid treatment for variant disease (e.g. - cancer, type 2 diabetes, anxiety, depression, asthma and cardiovascular diseases) have been meticulously studies with no major adverse effects.

In a previous study, the investigators demonstrated a higher ROS levels, a lower ATP content and a change in mitochondrial morphology in NNT_p.G200S homozygous fibroblasts compared with control fibroblasts.

Preliminary results of NNT_p.G200S homozygous fibroblasts' treatment with 10 micro molar L-ascorbic acid shows significant improvement in mitochondrial morphology and in ROS content.

The aim of this study is to figure out if ascorbic acid treatment improves the phenotype of NNT patients by reducing ROS in their adrenocortical cells and preventing their apoptosis.

During the study NNT_p.G200S homozygous patients (no.-3) will be hospitalised for ACTH and OGTT tests and start ascorbic acid treatment at a doses of 75-80% of the upper limit of allowance according to IOM. ACTH and OGTT will be repeated 6 months later to assess improvement in glucocorticoids production and insulin resistance.

• Study Type: Interventional
• Enrollment (Anticipated): 3
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Israel
  • Jerusalem, Israel, 99305
    • Hadassah Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 1 year and older (ADULT, OLDER_ADULT, CHILD)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• NNT mutation homozygous patients with glucocorticoids deficiency

Study Plan

How is the study designed?

Design Details

• Primary Purpose: TREATMENT
• Allocation: NON_RANDOMIZED
• Interventional Model: SINGLE_GROUP
• Masking: NONE

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
glucocorticoids secretion in response to ACTH test	1 year
basal ACTH levels	1 year

Secondary Outcome Measures

Outcome Measure	Time Frame
insulin and glucose levels in OGTT	1 year

Collaborators and Investigators

• Sponsor: Hadassah Medical Organization
• Collaborators: Soroka University Medical Center

Publications and helpful links

General Publications

• Meimaridou E, Kowalczyk J, Guasti L, Hughes CR, Wagner F, Frommolt P, Nurnberg P, Mann NP, Banerjee R, Saka HN, Chapple JP, King PJ, Clark AJ, Metherell LA. Mutations in NNT encoding nicotinamide nucleotide transhydrogenase cause familial glucocorticoid deficiency. Nat Genet. 2012 May 27;44(7):740-2. doi: 10.1038/ng.2299.
• Institute of Medicine (US) Panel on Dietary Antioxidants and Related Compounds. Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington (DC): National Academies Press (US); 2000. Available from http://www.ncbi.nlm.nih.gov/books/NBK225483/
• Weinberg-Shukron A, Abu-Libdeh A, Zhadeh F, Carmel L, Kogot-Levin A, Kamal L, Kanaan M, Zeligson S, Renbaum P, Levy-Lahad E, Zangen D. Combined mineralocorticoid and glucocorticoid deficiency is caused by a novel founder nicotinamide nucleotide transhydrogenase mutation that alters mitochondrial morphology and increases oxidative stress. J Med Genet. 2015 Sep;52(9):636-41. doi: 10.1136/jmedgenet-2015-103078. Epub 2015 Jun 12.

Study record dates

Study Major Dates

• Study Start: June 1, 2016
• Primary Completion (ANTICIPATED): August 1, 2017
• Study Completion (ANTICIPATED): December 1, 2017

Study Registration Dates

• First Submitted: July 17, 2016
• First Submitted That Met QC Criteria: July 19, 2016
• First Posted (ESTIMATE): July 20, 2016

Study Record Updates

• Last Update Posted (ESTIMATE): July 20, 2016
• Last Update Submitted That Met QC Criteria: July 19, 2016
• Last Verified: June 1, 2016

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Physiological Effects of Drugs; Molecular Mechanisms of Pharmacological Action; Protective Agents; Micronutrients; Vitamins; Antioxidants; Ascorbic Acid
• Other Study ID Numbers: 0631-15-HMO

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO