Pharmacodynamic studies of nasal tetracosactide with salivary glucocorticoids for a noninvasive Short Synacthen Test
Open Access
- 2 June 2020
- journal article
- research article
- Published by The Endocrine Society in Journal of Clinical Endocrinology & Metabolism
- Vol. 105 (8), 2692-2703
- https://doi.org/10.1210/clinem/dgaa323
Abstract
Context The Short Synacthen Test (SST) is the gold standard for diagnosing adrenal insufficiency. It requires invasive administration of Synacthen, venous sampling, and is resource-intensive. Objective To develop a nasally administered SST, with salivary glucocorticoids measurement, to assess the adrenal response. Design We conducted 5 studies: 4 open-label, sequence-randomized, crossover, pharmacodynamic studies testing 6 doses/formulations and a repeatability study. Additionally, pharmacokinetic analysis was undertaken using our chosen formulation, 500 µg tetracosactide with mucoadhesive chitosan, Nasacthin003, in our pediatric study. Setting Adult and children’s clinical research facilities. Participants A total of 36 healthy adult males and 24 healthy children. Intervention We administered all 6 nasal formulations using an European regulator endorsed atomization device. The IV comparators were 250 µg or 1 µg SST. Main Outcome Measures We analyzed paired blood and saliva samples for plasma cortisol and salivary cortisol and cortisone. Results The addition of chitosan to tetracosactide and dose escalation increased peak cortisol response (P = 0.01 and 0.001, respectively). The bioavailability of Nasacthin003 was 14.3%. There was no significant difference in plasma cortisol at 60 minutes between 500 µg Nasacthin003 and 250 µg IV Synacthen (P = 0.17). The repeatability coefficient at 60 minutes was 105 nmol/L for IV Synacthen and salivary cortisol and cortisone was 10.3 and 21.1 nmol/L, respectively. The glucocorticoid response in children was indistinguishable from that of adults. Conclusions Nasal administration of Nasacthin003 generates equivalent plasma cortisol values to the 250-µg IV SST and, with measurement at 60 minutes of salivary cortisol or cortisone, provides a noninvasive test for adrenal insufficiency.Keywords
Funding Information
- The Children’s Hospital Charity (CA09018, CA110916)
- Medical Research Council
- Academy of Medical Sciences
- British Society for Paediatric Endocrinology and Diabetes
This publication has 26 references indexed in Scilit:
- International survey on high‐ and low‐dose synacthen test and assessment of accuracy in preparing low‐dose synacthenClinical Endocrinology, 2018
- Diagnosis and Treatment of Primary Adrenal Insufficiency: An Endocrine Society Clinical Practice GuidelineJournal of Clinical Endocrinology & Metabolism, 2016
- ACTH Stimulation Tests for the Diagnosis of Adrenal Insufficiency: Systematic Review and Meta-AnalysisJournal of Clinical Endocrinology & Metabolism, 2016
- Adrenal insufficiencyThe Lancet, 2014
- The short Synacthen test: a questionnaire survey of current usageArchives of Disease in Childhood, 2012
- Delayed Diagnosis of Adrenal Insufficiency Is Common: A Cross-Sectional Study in 216 PatientsThe American Journal of the Medical Sciences, 2010
- Corticotropin Tests for Hypothalamic-Pituitary- Adrenal Insufficiency: A MetaanalysisJournal of Clinical Endocrinology & Metabolism, 2008
- The Diagnosis of Cushing's Syndrome: An Endocrine Society Clinical Practice GuidelineJournal of Clinical Endocrinology & Metabolism, 2008
- Profile, mean residence time of ACTH and cortisol responses after low and standard ACTH tests in healthy volunteersClinical Endocrinology, 2006
- On the meaning of low-dose ACTH(1-24) tests to assess functionality of the hypothalamic-pituitary-adrenal axisActa Endocrinologica, 1999