Abstract
Congenital central hypothyroidism occurs either in isolation or in conjunction with other pituitary hormone deficits. Using exome and candidate gene sequencing, we identified 8 distinct mutations and 2 deletions in IGSF1 in males from 11 unrelated families with central hypothyroidism, testicular enlargement and variably low prolactin concentrations. IGSF1 is a membrane glycoprotein that is highly expressed in the anterior pituitary gland, and the identified mutations impair its trafficking to the cell surface in heterologous cells. Igsf1-deficient male mice show diminished pituitary and serum thyroid-stimulating hormone (TSH) concentrations, reduced pituitary thyrotropin-releasing hormone (TRH) receptor expression, decreased triiodothyronine concentrations and increased body mass. Collectively, our observations delineate a new X-linked disorder in which loss-of-function mutations in IGSF1 cause central hypothyroidism, likely secondary to an associated impairment in pituitary TRH signaling.
| Original language | English |
|---|---|
| Pages (from-to) | 1375-81 |
| Number of pages | 7 |
| Journal | Nature Genetics |
| Volume | 44 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2012 |
Keywords / Materials (for Non-textual outputs)
- Adolescent
- Adult
- Aged
- Animals
- Base Sequence
- Child
- Child, Preschool
- Congenital Hypothyroidism
- Exome
- Ferrous Compounds
- Genetic Diseases, X-Linked
- Humans
- Immunoglobulins
- Infant
- Male
- Membrane Proteins
- Mice
- Middle Aged
- Mutation
- Pituitary Gland
- Prolactin
- Receptors, Thyrotropin-Releasing Hormone
- Sequence Analysis, DNA
- Syndrome
- Testicular Diseases
- Testis
- Thyrotropin
- Triiodothyronine
- Young Adult