A Chinese Family with Familial Dysalbuminemic Hyperthyroxinemia (FDH) due to R242H Mutation on Human Albumin Gene: Reevaluating the Role of FDH in Patients with Asymptomatic Hyperthyroxinemia
Joint Authors
Ran, Jianmin
Liu, Yan
Liu, Hongbing
Chen, Chuping
Chen, Guangshu
Zhu, Ping
Tan, Rongshao
Source
International Journal of Endocrinology
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-09-09
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Objective.
Familial dysalbuminemic hyperthyroxinemia (FDH) has now become an established cause for spurious asymptomatic hyperthyroxinemia.
Several different codon mutations on albumin gene had been identified.
We here provided an established but rarely reported heterozygous mutation based on gene sequencing results from a Chinese family.
Methods.
The proband is a 14-year-old girl with light goiter and asymptomatic clinical presentations, whose thyroid function test by a one-step immunoassay showed increased free thyroxine (FT4) and free triiodothyronine (FT3) but nonsuppressed thyrotropin (TSH).
All thyroid auto-antibodies were in the normal range.
Blood samples were collected from her and most of her immediate family members for target gene sequencing and verification.
Results.
Hyperthyroxinemia was also confirmed in the proband’s mother and one of her uncles and his son.
In the proband and these three pedigrees, the high-throughput gene screening sequencing and the following Sanger sequencing disclosed a heterozygous mutation in the albumin gene, which located in its exon 7 (c.725G > A), and correspondingly leads to an arginine replacement with a histidine (R242H) in its protein.
This is an established mutation named as R218H if present without signal peptide sequence.
Conclusions.
For patients with asymptomatic hyperthyroxinemia, FDH should be clinically excluded before embarking on further investigations for other specific causes.
American Psychological Association (APA)
Liu, Hongbing& Ran, Jianmin& Chen, Chuping& Chen, Guangshu& Zhu, Ping& Tan, Rongshao…[et al.]. 2019. A Chinese Family with Familial Dysalbuminemic Hyperthyroxinemia (FDH) due to R242H Mutation on Human Albumin Gene: Reevaluating the Role of FDH in Patients with Asymptomatic Hyperthyroxinemia. International Journal of Endocrinology،Vol. 2019, no. 2019, pp.1-7.
https://search.emarefa.net/detail/BIM-1159624
Modern Language Association (MLA)
Liu, Hongbing…[et al.]. A Chinese Family with Familial Dysalbuminemic Hyperthyroxinemia (FDH) due to R242H Mutation on Human Albumin Gene: Reevaluating the Role of FDH in Patients with Asymptomatic Hyperthyroxinemia. International Journal of Endocrinology No. 2019 (2019), pp.1-7.
https://search.emarefa.net/detail/BIM-1159624
American Medical Association (AMA)
Liu, Hongbing& Ran, Jianmin& Chen, Chuping& Chen, Guangshu& Zhu, Ping& Tan, Rongshao…[et al.]. A Chinese Family with Familial Dysalbuminemic Hyperthyroxinemia (FDH) due to R242H Mutation on Human Albumin Gene: Reevaluating the Role of FDH in Patients with Asymptomatic Hyperthyroxinemia. International Journal of Endocrinology. 2019. Vol. 2019, no. 2019, pp.1-7.
https://search.emarefa.net/detail/BIM-1159624
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1159624