Activation of the PI3K-AKT-mTOR cascade in uterine leiomyosarcoma: a retrospective study of 31 patients
- Authors: Rozonova O.A.1, Artamonova E.V.1,2,3, Kozlov N.A.1, Delektorskaya V.V.1, Egorova A.V.2, Stilidi I.S.1,2,4
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Affiliations:
- Blokhin National Medical Research Center of Oncology
- Pirogov Russian National Research Medical University
- Vladimirsky Moscow Regional Research Clinical Institute
- Russian Medical Academy of Continuous Professional Education
- Issue: Vol 23, No 4 (2021)
- Pages: 660-665
- Section: CLINICAL ONCOLOGY
- URL: https://bakhtiniada.ru/1815-1434/article/view/83802
- DOI: https://doi.org/10.26442/18151434.2021.4.201221
- ID: 83802
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Abstract
Background. Taking into account the literature data, the activation of the PI3K-AKT-mTOR cascade plays a role in the development of leiomyosarcoma (LMS), and the expression of markers of this signaling pathway in the tumor is associated with a more aggressive course of the disease. In addition, there is some data on the effective use of mTOR inhibitors in LMS.
Aim. To study the frequency of expression of mTOR and phospho-mTOR markers in relapse of high-grade uterine LMS and to evaluate the effect of phospho-mTOR expression on the immediate and long-term results of the use of doxorubicin-containing chemotherapy regimens and the combination of gemcitabine + docetaxel.
Materials and methods. The study included 31 patients with high-grade uterine LMS operated on for relapse. IHC was performed using mTOR and phospho-mTOR antibodies on ready-made histological preparations of the surgical material. The expression level of these markers was estimated as a percentage from 0 to 100%. The immediate and long-term results of the most commonly used drug treatment regimens (doxorubicin-containing regimens and gemcitabine + docetaxel combinations) were analyzed depending on the level of phospho-mTOR expression in the tumor.
Results. The expression of mTOR in the tumor was detected in 4 patients with an expression level from 1 to 2%, and the expression of phospho-mTOR was detected in 20 patients with an expression level from 1 to 70%. Median OS in the group without phospho-mTOR expression was 135 months, in the group with expression – 104 months, p=0.732. When using doxorubicin-containing regimens in the group with phospho-mTOR expression, 12% of patients had a partial response (PR), median PFS was 26.7 months, in the group without expression there was no PR, median PFS was 8.7 months, p=0.67. When using a combination of gemcitabine + docetaxel, in the group with phospho-mTOR expression, 24% of patients had PR, median PFS was 11.1 months, in the group without expression, 14% of patients had PR, median PFS was 12.4 months, p=0.372.
Conclusion. Phospho-mTOR expression was detected in 2/3 of patients with high-grade uterine LMS. There was no effect of the expression of this marker on the OS of all included patients and on PFS in patients who received chemotherapy according to the gemcitabine + docetaxel regime. There was a tendency to an increase in PFS in the group with phospho-mTOR expression in patients who received doxorubicin-containing chemotherapy regimens.
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##article.viewOnOriginalSite##About the authors
Olga A. Rozonova
Blokhin National Medical Research Center of Oncology
Author for correspondence.
Email: rozonova.oa@yandex.ru
ORCID iD: 0000-0003-4980-0175
Graduate Student
Russian Federation, MoscowElena V. Artamonova
Blokhin National Medical Research Center of Oncology; Pirogov Russian National Research Medical University; Vladimirsky Moscow Regional Research Clinical Institute
Email: artamonovae@mail.ru
ORCID iD: 0000-0001-7728-9533
D. Sci. (Med.), Prof.
Russian Federation, MoscowNikolai A. Kozlov
Blokhin National Medical Research Center of Oncology
Email: rozonova.oa@yandex.ru
ORCID iD: 0000-0003-3852-3969
Cand. Sci. (Med.)
Russian Federation, MoscowVera V. Delektorskaya
Blokhin National Medical Research Center of Oncology
Email: rozonova.oa@yandex.ru
ORCID iD: 0000-0002-4550-2069
D. Sci. (Med.)
Russian Federation, MoscowAngelina V. Egorova
Pirogov Russian National Research Medical University
Email: rozonova.oa@yandex.ru
ORCID iD: 0000-0003-3904-8530
Cand. Sci. (Med.), Assoc. Prof.
Russian Federation, MoscowIvan S. Stilidi
Blokhin National Medical Research Center of Oncology; Pirogov Russian National Research Medical University; Russian Medical Academy of Continuous Professional Education
Email: rozonova.oa@yandex.ru
ORCID iD: 0000-0002-0493-1166
D. Sci. (Med.), Prof., Acad. RAS
Russian Federation, MoscowReferences
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