SNPMiner Trials by Shray Alag

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SNPMiner SNPMiner Trials (Home Page)


Report for Mutation V736A

Developed by Shray Alag, 2020-2021.
SNP Clinical Trial Gene

There is one clinical trial.

Clinical Trials


1 The Effect of Genetic Variation in TMPRSS6 Gene (SNP rs855791) on Oral Iron Absorption: an Iron Stable Isotope Study

Iron deficiency is considered the most common nutritional deficiency worldwide and affects children and women in both non-industrialized as well as industrialized countries. The main regulatory molecule of iron metabolism is hepcidin, a hormone produced in the liver that regulates intestinal iron absorption, placental transport, recycling of iron by macrophages and release from stores. The expression of hepcidin is regulated by many mediators, one of which is Matriptase-2 - a transmembrane protease. Complete loss of function leads to the rare disease iron-refractory iron deficiency anemia (IRIDA). Matriptase-2 is encoded by the gene TMPRSS6 and the single nucleotide polymorphism (SNP) rs855791 causes a non-synonymous substitution (V736A) that reduces the activity of the protease to inhibit hepcidin transcription. Genome wide association studies have identified the TMPRSS6 SNP rs855791 has a strong association with red blood cell and iron parameters in the general population. The objectives of the study is to measure oral iron absorption and systemic iron utilization into red blood cells (RBC) using oral isotopic labels in subjects homozygotes for common variants of the TMPRSS6 gene with the SNP rs855791 (A736V); AA vs. VV subjects. The aim is to conduct an iron absorption study in 80 Taiwanese women of reproductive age, non-pregnant, non-anemic, investigating the effect of the genetic variants of the SNP rs855791. The participants will be split in two groups of equal size; wild type AA vs. mutation VV. Iron absorption and systemic utilization will be assessed by two test meals containing stable isotopes of iron.The primary outcome of the trial is the oral iron absorption from a test meal as compared between the two genotypes AA vs. VV. Secondary outcomes are the comparison iron status markers between the two genotypes.

NCT03317873
Conditions
  1. Iron Metabolism Disorders
Interventions
  1. Dietary Supplement: Testmeal A
  2. Dietary Supplement: Testmeal B
MeSH:Metabolic Diseases Iron Metabolism Disorders

Matriptase-2 is encoded by the gene TMPRSS6 and the single nucleotide polymorphism (SNP) rs855791 causes a non-synonymous substitution (V736A) that reduces the activity of the protease to inhibit hepcidin transcription. --- V736A ---

Primary Outcomes

Description: The change in the isotopic ratio of iron in blood will be measured after the administration of test meal including iron isotopes.

Measure: Change from baseline in the isotopic ratio of iron in blood at week 2

Time: baseline, 2 weeks

Secondary Outcomes

Description: fasting concentrations of plasma hepcidin in AA and VV variants of SNP rs855791

Measure: hepcidin

Time: baseline

Description: The difference in fasting concentrations of serum iron, transferrin saturation, serum ferritin, hemoglobin, erythrocyte volume in AA and VV variants of SNP rs855791

Measure: iron status

Time: baseline


HPO Nodes