Abstract:
BACKGROUND:Activating mutations of the vasopressin receptor gene on the X chromosome cause the nephrogenic syndrome of inappropriate antidiuresis (NSIAD). We describe a male child who presented with persistent hyponatraemia and whose mother was also found to be hyponatraemic. She had learnt to avoid excess fluid consumption because of associated malaise. Both individuals had a subnormal ability to excrete a water load with mother also demonstrating a heightened sense of thirst at low serum osmolalities. RESULTS:Mother and child were found to have the previously characterised activating mutation (p.Arg137Cys) of the arginine vasopressin receptor type 2 gene (AVPR2), but had measurable levels of AVP when hyponatraemic. CONCLUSIONS:We conclude that female carriers of activating mutations of the vasopressin receptor are susceptible to hyponatraemia and therefore need to be provided with advice regarding fluid intake. An altered thirst perception may increase susceptibility to hyponatraemia. We confirm that the presence of measurable amounts of AVP in patients with hyponatraemia does not exclude the diagnosis of NSIAD.
journal_name
Eur J Endocrinoljournal_title
European journal of endocrinologyauthors
Gupta S,Cheetham TD,Lambert HJ,Roberts C,Bourn D,Coulthard MG,Ball SGdoi
10.1530/EJE-09-0246subject
Has Abstractpub_date
2009-09-01 00:00:00pages
503-8issue
3eissn
0804-4643issn
1479-683Xpii
EJE-09-0246journal_volume
161pub_type
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journal_title:European journal of endocrinology
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pub_type: 杂志文章
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pub_type: 杂志文章,多中心研究,随机对照试验
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pub_type: 杂志文章,随机对照试验
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