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Published in: Pituitary 5/2020

01-10-2020 | Insulins

Is pasireotide-induced diabetes mellitus predictable? A pilot study on the effect of a single dose of pasireotide on glucose homeostasis

Authors: Mattia Barbot, Daniela Regazzo, Alessandro Mondin, Marialuisa Zilio, Laura Lizzul, Martina Zaninotto, Mario Plebani, Giorgio Arnaldi, Filippo Ceccato, Carla Scaroni

Published in: Pituitary | Issue 5/2020

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Abstract

Introduction

Pasireotide (PAS) is an effective treatment for Cushing’s disease (CD) but its use is burdened by an associated high incidence of diabetes mellitus (DM). The aim of this study was to examine the effect of a single subcutaneous injection of PAS on glucose metabolism in CD, and to identify predictors of DM onset.

Methods

Fifteen patients with CD (13 females, 2 males; median age 43 years [IQR 34–50]) were submitted to an acute PAS test (600 µg s.c.), measuring glucose, insulin, C-peptide, GIP, glucagon, GLP-1, ACTH, and cortisol at the baseline and every 30 min for 2 h. Then they were treated twice daily with PAS 600 µg, and followed up with clinical and hormone assessments for a median of 6 months [2–13].

Results

PAS prompted a significant decrease in all hormonal parameters considered except for glycemia, which increased (as expected), reaching the highest value at 120′ (p < 0.0001). Overall, 9/15 patients developed DM within 2 months of starting PAS therapy. There were no differences in age, weight, visceral adiposity, HOMA index, fasting glucose or severity of CD between patients who developed DM and those who did not. Baseline fasting glucagon levels were higher in the DM patients (17.95 [12.45–20.54] vs. 10.53 [8.11–12.33] pmol/L, p = 0.0256), and so were GIP and HbA1c levels (37 [5.5–39.5] vs. 29 [27–31.8] mmol/mol, p = 0.0008). Glucose at 120′ was also significantly higher in the DM patients (9.5 [8.65–11.95] vs. 6.85 [4.48–9] mmol/L, p = 0.012).

Conclusions

PAS was rapidly able to suppress insulin and incretin secretion, with a subsequent rise in glucose levels into the diabetic range. It also induced a significant inhibition of glucagon production. The patients at higher risk of DM during PAS therapy were those with higher glucagon levels, HbA1c > 34.5 mmol/mol, and a glucose peak after PAS administration > 9 mmol/L. CD patients with these features given PAS therapy should therefore be monitored more carefully.
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Metadata
Title
Is pasireotide-induced diabetes mellitus predictable? A pilot study on the effect of a single dose of pasireotide on glucose homeostasis
Authors
Mattia Barbot
Daniela Regazzo
Alessandro Mondin
Marialuisa Zilio
Laura Lizzul
Martina Zaninotto
Mario Plebani
Giorgio Arnaldi
Filippo Ceccato
Carla Scaroni
Publication date
01-10-2020
Publisher
Springer US
Published in
Pituitary / Issue 5/2020
Print ISSN: 1386-341X
Electronic ISSN: 1573-7403
DOI
https://doi.org/10.1007/s11102-020-01055-x

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