Details Of Published TSH Receptor Mutation

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Ala 623 Gly

c.1868C>T

Constitutively Activating TSH Receptor Mutation

Type

gain

Manifestation

somatic

Exon

Molecular Characteristics:

No published data for in vitro characterization

Clinical Features:

solitary thyroid nodule, hyperfunctioning

Treatment:

preoperative treatment with methimazole and iodide, thyroid lobectomy

Functional Characteristics:

cAMP
(basal)

cAMP
(TSH)

IP
(basal)

IP
(TSH)

TSH-Binding

Cell Surface Expression

Prevalence

LRA

Ref

Legend:

cAMP (basal): basal in vitro cAMP production of mutant over wild-type TSHR

cAMP (TSH): maximal in vitro cAMP production of mutant over wild-type TSHR

IP (basal): basal in vitro IP production of mutant over wild-type TSHR

IP (TSH): maximal in vitro IP production of mutant over wild-type TSHR

TSH-binding: maximal TSH-binding compared to the wild-type TSHR

Cell surface expression: cell surface expression of mutant compared to WT-TSHR

LRA: linear regression analysis (LRA) of constitutive activity as a function of TSHR expression determined by 125I-bTSH binding or FACS analysis compared to the wild-type TSHR

Prevalence: Prevalence of (somatic and germline) activating mutations*

Ref: Reference for functional characterization

Child: Found in children.

Reference 1:

Tonacchera et al.

J. Clin. Endocrinol. Metab. 84: 4155-4158

Functioning and nonfunctioning thyroid adenomas involve different molecular pathogenetic mechanisms

1999

Abstract In Medline Available