The efficacy of the combination of eribulin and trastuzumab in advanced HER2-positive breast cancer: the results of Russian observational study

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Abstract

The article presents the experience of 19 Russian medical institutions on the use of eribulin in combination with trastuzumab in various treatment lines of metastatic HER2+ breast cancer in routine clinical practice.

Aim. The main objective of this retrospective observational study was to evaluate the efficacy and tolerability of eribulin and trastuzumab combo in HER2+ breast cancer patients pretreated with anthracyclines and taxanes. The analysis included 60 patients who received at least 2 cycles of eribulin in combination with trastuzumab. 2 patients (3.3%) received treatment as the 1st line, as the 2nd – 14 (23.3%), as the 3rd – 16 (26.7%), and as the 4th and more – 28 (46.7%).

Materials and methods. Complete response was achieved in 2 (3.3%) patients, partial response in 9 (15%), stable disease in 33 (55%), stabilization for more than 6 months in 11 (18.3%), disease progression was detected in 16 (26.7%) patients. The objective response rate was 18.3% in the whole group, the clinical benefit rate – 36.7%.

Results. The objective response rate in the group of the luminal subtype (ER/PR+HER2+) was 26.9%, in HER2-overexpressed subtype (ER-PR-HER2+) – 8.8% and 64.7%, respectively, disease progression was recorded 2.3 times more often – 35.3% versus 15.5% in the luminal subtype group. The median progression-free survival in patients with HER2+ breast cancer was 4.95 months (95% confidence interval – CI 3.04–8.29 months), in luminal subtype – 6.38 months (95% CI 3.33–8.54 months), in non-luminal – 4.44 months (95% CI 2.4–7.96 months); p=0.306. The treatment was well tolerated, the spectrum of adverse events corresponded to the eribulin toxicity profile.

Conclusions. The uniqueness of this study lies in the fact that on a large clinical material from the standpoint of real clinical practice, a very promising treatment regimen that is not used routinely in a number of countries has been studied, its effectiveness and satisfactory tolerance have been confirmed.

About the authors

Elena I. Kovalenko

Blokhin National Medical Research Center of Oncology

Author for correspondence.
Email: eikovalenko@mail.ru
ORCID iD: 0000-0003-4763-7992

Cand. Sci. (Med.)

Russian Federation, Moscow

Elena V. Artamonova

Blokhin National Medical Research Center of Oncology

Email: eikovalenko@mail.ru

D. Sci. (Med.)

Russian Federation, Moscow

Elena V. Karabina

Tula Regional Oncologic Dispensary

Email: eikovalenko@mail.ru
ORCID iD: 0000-0002-8936-3590

Branch manager

Russian Federation, Tula

Irina I. Andreiashkina

Loginov Moscow Clinical Scientific Practical Center

Email: eikovalenko@mail.ru
Russian Federation, Moscow

Ekaterina A. Prokof’eva

City Clinic №60

Email: eikovalenko@mail.ru
Russian Federation, Saint Petersburg

Nataliia O. Popova

Tomsk National Research Medical Center

Email: eikovalenko@mail.ru
Russian Federation, Tomsk

Elena A. Gaisina

Multidisciplinary Clinical Medical Center “Medical City”

Email: eikovalenko@mail.ru
Russian Federation, Tyumen

Irina V. Evstigneeva

Tver Regional Clinical Oncology Center

Email: eikovalenko@mail.ru
Russian Federation, Tver

Mikhail V. Shaidorov

Togliatti City Clinical Hospital №5

Email: eikovalenko@mail.ru
Russian Federation, Togliatti

Larisa A. Zhiliaeva

Kursk Regional Clinical Oncology Center

Email: eikovalenko@mail.ru
Russian Federation, Kursk

Dmitrii M. Ponomarenko

Regional Oncology Center

Email: eikovalenko@mail.ru
Russian Federation, Irkutsk

Alfiia I. Khasanova

Republican Clinical Oncology Center

Email: eikovalenko@mail.ru
Russian Federation, Kazan

Guzel Z. Mukhametshina

Republican Clinical Oncology Center

Email: eikovalenko@mail.ru
Russian Federation, Kazan

Anton E. Koziakov

Novosibirsk Regional Clinical Oncology Center

Email: eikovalenko@mail.ru
Russian Federation, Novosibirsk

Liudmila V. Vorotilina

Clinical Oncology Center

Email: eikovalenko@mail.ru
Russian Federation, Omsk

Anton Iu. Povyshev

District Clinical Hospital

Email: eikovalenko@mail.ru
Congo, Khanty-Mansiysk

Elena I. Simolina

Tomsk National Research Medical Center

Email: eikovalenko@mail.ru
Russian Federation, Tomsk

Vasilii V. Marfutov

Loginov Moscow Clinical Scientific Practical Center

Email: eikovalenko@mail.ru
Russian Federation, Moscow

Dmitrii V. Kozlov

Diagnostic Clinical Center №1, branch №5

Email: eikovalenko@mail.ru
Russian Federation, Moscow

Irina R. Suslova

Oncology Center №4

Email: eikovalenko@mail.ru
Russian Federation, Moscow

Valentina E. Shikina

Federal Research Center for Specialized Types of Medical Assistance and Medical Technologies

Email: eikovalenko@mail.ru
Russian Federation, Moscow

Tatiana V. Karandeeva

Pletnev City Clinical Hospital

Email: eikovalenko@mail.ru
Russian Federation, Moscow

Artem O. Shepel’

Pletnev City Clinical Hospital

Email: eikovalenko@mail.ru
Russian Federation, Moscow

Liudmila V. Kramskaia

Pletnev City Clinical Hospital

Email: eikovalenko@mail.ru
Russian Federation, Moscow

Denis A. Oskirko

Pletnev City Clinical Hospital

Email: eikovalenko@mail.ru
Russian Federation, Moscow

Olga S. Frolova

Saint Petersburg Clinical Scientific and Practical Center for Specialized Types of Medical Care (Oncology)

Email: eikovalenko@mail.ru
Russian Federation, Saint Petersburg

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Supplementary files

Supplementary Files
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1. JATS XML
2. Fig. 1. Localization of metastases (n=60).

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3. Fig. 2. Chemotherapy lines of eribulin in patients with HER2-positive metastatic breast cancer (n=60).

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4. Fig. 3. Progression-free survival (PFS) in HER2-positive metastatic breast cancer (n=60).

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5. Fig. 4. PFS in luminal and non-luminal HER2-positive metastatic breast cancer.

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