Efficacy and predictors of response to somatostatin analogues in patients with ectopic ACTH syndrome
- Authors: Golounina O.O.1, Belaya Z.E.1, Markovich A.A.2, Rozhinskaya L.Y.1, Mel`nichenko G.A.1, Mokrysheva N.G.1, Dedov I.I.1
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Affiliations:
- Endocrinology Research Centre
- Blokhin National Medical Research Center of Oncology
- Issue: Vol 96, No 10 (2024): Вопросы эндокринологии
- Pages: 932-941
- Section: Original articles
- URL: https://journals.rcsi.science/0040-3660/article/view/277887
- DOI: https://doi.org/10.26442/00403660.2024.10.202856
- ID: 277887
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Abstract
Aim. To study the immediate efficacy, tolerability and predictors of response to prolonged-acting somatostatin analogues (SSAs) in patients with ectopic ACTH syndrome (EAS).
Materials and methods. A multicenter, observational study with a retrospective analysis. The effectiveness of treatment was evaluated every 12–24 weeks by the activity of hypercortisolism, clinical symptoms of the disease, control of tumor growth. Patients were conditionally divided into “responders” and “non-responders” at time points of 6, 12 and 24 months. Radiological efficacy was performed according to the RECIST 1.1. Statistical data processing was carried out by using IBM SPSS Statistics 23.
Results. The study included 46 patients (26 women, 20 men). The median follow-up period was 71 months [32; 122]. Localized tumor process (T1-3N0M0) – in 19 (41.3%) patients, locally widespread (T1-3N1M0, T4N0-1M0) – in 15 (32.6%), generalized (T1-4N0-1M1) – in 12 (26.1%) cases. Surgical treatment was performed in 33 (71.7%) patients. SSAs were the first-line therapy for all 46 patients. The average duration of SSAs use was 34 months (Me 27.5 [13.8; 41]). Dose escalation was required in 39.4% cases, the period before the first dose escalation was on average 9 months. 13 (48.1%) patients achieved drug-induced remission of the disease. Normalization of cortisol in 24hUFC or its decrease ≥50% from the baseline level by the 6th month of treatment was achieved in 46.4%, by the 12th month – in 61.9%, “eluding” from the effect of therapy was observed in 3 patients. Objective response was evaluated in 30 patients. There was no complete response to the treatment. In 4 (13.3%) cases – a partial response, in 15 (50%) – disease stabilization, in 11 (36.7%) – disease progression. The best therapeutic efficacy of SSAs is associated with bronchial NET (HR 0.078, 95% CI 0.010–0.633; p=0.017), and resistance to treatment is associated with negative expression of SSTR5 (HR 6.532, 95% CI 1.019–41.878; p=0.048).
Conclusion. SSAs are the drugs of choice for the first-line treatment of patients with EAS, allowing for long-term effective control of hypercortisolism and tumor progression in more than 60% of patients. Significant factors determining the response to SSAs after 6 months of treatment are expression status of SSTR5 and NET localization.
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##article.viewOnOriginalSite##About the authors
Olga O. Golounina
Endocrinology Research Centre
Author for correspondence.
Email: olga.golounina@mail.ru
ORCID iD: 0000-0003-2320-1051
клин. ординатор
Russian Federation, MoscowZhanna E. Belaya
Endocrinology Research Centre
Email: jannabelaya@gmail.com
ORCID iD: 0000-0002-6674-6441
д-р мед. наук, проф. каф. эндокринологии Института высшего и дополнительного профессионального образования, зав. отд-нием остеопороза и остеопатии
Russian Federation, MoscowAlla A. Markovich
Blokhin National Medical Research Center of Oncology
Email: a-markovich@yandex.ru
ORCID iD: 0000-0002-5548-1724
канд. мед. наук, ст. науч. сотр. поликлинического отд-ния
Russian Federation, MoscowLiudmila Y. Rozhinskaya
Endocrinology Research Centre
Email: lrozhinskaya@gmail.com
ORCID iD: 0000-0001-7041-0732
д-р мед. наук, проф., гл. науч. сотр. отд-ния остеопороза и остеопатии
Russian Federation, MoscowGalina A. Mel`nichenko
Endocrinology Research Centre
Email: teofrast2000@mail.ru
ORCID iD: 0000-0002-5634-7877
акад. РАН, д-р мед. наук, проф., зав. каф. клинической эндокринологии Института высшего и дополнительного профессионального образования, зам. дир. Центра по научной работе
Russian Federation, MoscowNatalia G. Mokrysheva
Endocrinology Research Centre
Email: mokrisheva.natalia@endocrincentr.ru
ORCID iD: 0000-0002-9717-9742
чл.-кор. РАН, д-р мед. наук, проф., зав. каф. персонализированной и трансляционной медицины, дир.
Russian Federation, MoscowIvan I. Dedov
Endocrinology Research Centre
Email: dedov@endocrincentr.ru
ORCID iD: 0000-0002-8175-7886
акад. РАН, д-р мед. наук, проф., президент
Russian Federation, MoscowReferences
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