The Claim
Heterozygous loss of DIO1 function in humans and mice results in elevated serum reverse triiodothyronine (rT3) and an increased rT3/T3 ratio, indicating that haploinsufficiency is the underlying mechanism.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When one copy of the DIO1 gene is not functional in humans and mice, serum levels of reverse triiodothyronine (rT3) rise and the ratio of rT3 to T3 increases, demonstrating that having only one working copy of the gene is sufficient to alter thyroid hormone metabolism.
See the scientific wording
Heterozygous loss of DIO1 function in humans and mice leads to a similar biochemical phenotype of elevated serum reverse triiodothyronine (rT3) and increased rT3/T3 ratio, suggesting haploinsufficiency as the underlying mechanism rather than dominant-negative effects.
When only one copy of the DIO1 gene works, the enzyme it produces cannot process thyroid hormones efficiently. This leads to a buildup of reverse T3 and a drop in active T3 because the enzyme works too slowly to clear reverse T3 and make enough T3 from its precursor.
What the research says
1 studyStudy: Human Type 1 Iodothyronine Deiodinase (DIO1) Mutations Cause Abnormal Thyroid Hormone Metabolism
People and mice with just one broken copy of the DIO1 gene have the same weird thyroid hormone pattern: too much reverse T3 and not enough active T3. This means having only half the normal enzyme isn’t enough to keep things working right, not that the broken gene is actively messing things up.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.