Initiating desmopressin (DDAVP) for diabetes insipidus in Wolfram syndrome caused abrupt volume expansion, 50-fold elevated ANP and elevated BNP, leading to life-threatening renal salt wasting — rescued by fludrocortisone.
50-fold ANP surgeDDAVP-induced volume expansion caused a 50-fold increase in ANP, blocking aldosterone production and causing potentially fatal sodium loss — rescuable with fludrocortisone
What the researchers found
DDAVP initiation in untreated Wolfram DI caused ANP elevation ×50 and BNP ×2-4, blocking zona glomerulosa steroidogenesis, causing secondary mineralocorticoid deficiency and acute hyponatremia from RSW. Fludrocortisone 100-200 μg twice daily rescued electrolytes within 48 hours.
Why it matters
This identifies a potentially life-threatening complication when starting a common peptide drug (DDAVP) for diabetes insipidus. The natriuretic peptide-mediated mechanism explains why this happens and how to prevent or treat it.
The numbers in context
ANP 50x elevated; BNP 2-4x elevated; fludrocortisone 100-200 μg BID; electrolytes normalized in 48h
How the study worked
Clinical case report. Two sisters (19 and 7 years) with Wolfram syndrome and untreated DI. Initiated oral melt DDAVP. ANP and BNP levels measured. Electrolyte monitoring. Fludrocortisone treatment and response documented.
Who was studied
Two sisters (ages 19 and 7) with Wolfram syndrome and untreated diabetes insipidus
What this study cannot tell us
Case report of two sisters (one family). Wolfram syndrome is extremely rare. The 50-fold ANP elevation may reflect the severity of untreated DI. Results may not generalize to milder volume expansion scenarios.
How to read the evidence
Low evidence (case report of 2 patients). Important for clinical awareness despite limited sample. Mechanism is physiologically sound.
When this study was published
Published 2021. Important safety alert for clinicians initiating DDAVP in untreated diabetes insipidus.
The bigger picture
This case reveals how natriuretic peptide surges can cause dangerous electrolyte disturbances — a mechanism relevant beyond Wolfram syndrome. Any condition involving rapid volume expansion could trigger similar ANP/BNP-mediated salt wasting.
Questions still open
- Should ANP/BNP be routinely monitored when starting DDAVP for any form of diabetes insipidus?
- Could prophylactic fludrocortisone prevent this complication?
- Does this mechanism contribute to hyponatremia in other conditions involving rapid fluid administration?
Common questions
What went wrong when these patients started DDAVP?
What are ANP and BNP?
Read the original research
Lessons from Wolfram Syndrome: Initiation of DDAVP Therapy Causes Renal Salt Wasting Due to Elevated ANP/BNP Levels, Rescued by Fludrocortisone Treatment.
Indian journal of pediatrics, 88(6), 582-585
Citation
Kleanthous, Kleanthis; Maratou, Eirini; Spyropoulou, Dora; Dermitzaki, Eleni; Papadimitriou, Anastasios; Zoupanos, George; Moutsatsou, Paraskevi; Mastorakos, George; Urano, Fumihiko; Papadimitriou, Dimitrios T. (2021). Lessons from Wolfram Syndrome: Initiation of DDAVP Therapy Causes Renal Salt Wasting Due to Elevated ANP/BNP Levels, Rescued by Fludrocortisone Treatment.. Indian journal of pediatrics, 88(6), 582-585. https://doi.org/10.1007/s12098-020-03538-y