RGD Reference Report - PAX8 mutations associated with congenital hypothyroidism caused by thyroid dysgenesis. - Rat Genome Database

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PAX8 mutations associated with congenital hypothyroidism caused by thyroid dysgenesis.

Authors: Macchia, PE  Lapi, P  Krude, H  Pirro, MT  Missero, C  Chiovato, L  Souabni, A  Baserga, M  Tassi, V  Pinchera, A  Fenzi, G  Gruters, A  Busslinger, M  Di Lauro, R 
Citation: Macchia PE, etal., Nat Genet. 1998 May;19(1):83-6.
RGD ID: 1600298
Pubmed: PMID:9590296   (View Abstract at PubMed)
DOI: DOI:10.1038/ng0598-83   (Journal Full-text)

Permanent congenital hypothyroidism (CH) is a common disease that occurs in 1 of 3,000-4,000 newborns. Except in rare cases due to hypothalamic or pituitary defects, CH is characterized by elevated levels of thyroid-stimulating hormone (TSH) resulting from reduced thyroid function. When thyroid hormone therapy is not initiated within the first two months of life, CH can cause severe neurological, mental and motor damage. In 80-85% of cases, CH is associated with and presumably is a consequence of thyroid dysgenesis (TD). In these cases, the thyroid gland can be absent (agenesis, 35-40%), ectopically located (30-45%) and/or severely reduced in size (hypoplasia, 5%). Familial cases of TD are rare, even though ectopic or absent thyroid has been occasionally observed in siblings. The pathogenesis of TD is still largely unknown. Although a genetic component has been suggested, mutations in the gene encoding the receptor for the thyroid-stimulating hormone (TSHR) have been identified in only two cases of TD with hypoplasia. We report mutations in the coding region of PAX8 in two sporadic patients and one familial case of TD. All three point mutations are located in the paired domain of PAX8 and result in severe reduction of the DNA-binding activity of this transcription factor. These genetic alterations implicate PAX8 in the pathogenesis of TD and in normal thyroid development.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
congenital hypothyroidism  IAGP 1600298nongoitrous congenital hypothyroidism 2 and OMIM:218700 RGD 
congenital hypothyroidism  ISOPAX8 (Homo sapiens)1600298; 1600298nongoitrous congenital hypothyroidism 2 and OMIM:218700 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Pax8  (paired box 8)

Genes (Mus musculus)
Pax8  (paired box 8)

Genes (Homo sapiens)
PAX8  (paired box 8)


Additional Information