Safety of Pembroria® during non-medical switching from Keytruda® in patients with advanced malignant neoplasms of various localizations: the REFLECTION real-world study

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Background. Post-registration observational studies with switching therapy from the original drug to a biosimilar for non-medical indications allow us to assess the safety and effectiveness of this type of switching in real clinical practice.

Aim. Evaluation of the safety and effectiveness of non-medical switching from the original drug Keytruda® to the biosimilar drug Pembroria® in patients with various oncological pathologies in real clinical practice (REFLECTION).

Materials and methods. A retrospective analysis of data from electronic medical records from 21 medical institutions of the Russian Federation for the period 2020–2023 was carried out. Data were included from patients with cancer of various locations who received at least 2 injections of Keytruda® followed by switching to Pembroria® for non-medical indications (at least 2 injections). Primary criteria: incidence of immune-mediated adverse reactions (ImARs) of any severity. Secondary indicators: incidence of ImARs of various degrees of severity and infusion reactions, frequency of objective response rate (according to RECIST 1.1 criteria).

Results. The analysis included data from 382 patients (male/female 200/182, median age 62 years) with NSCLC (24.1%), RCC (23.3%), melanoma (20.4%) and cancer of other localization. Patients received Keytruda® on 1st and 2nd lines (54.2 and 25.4% of patients, respectively), on 3 or 4 lines (14.1%), or as part of adjuvant therapy (6.3%). 50.5% of patients received pembrolizumab as monotherapy. The median number of administrations was 7.0 and 5.0 for Keytruda® and Pembroria®, respectively. ImARs were registered in 44 (11.5%) patients (60 ImARs), including 40 ImARs in 35 (9.2%) patients while using Keytruda® and 20 ImARs in 17 (2.4%) patients with Pembroria®. The most common ImARs were hypothyroidism, hyperthyroidism, and hepatitis; the frequency of these ImARs was higher with Keytruda® (EAER for hypothyroidism 0.00422 and 0.00144, for hepatitis – 0.00124 and 0.00096, respectively). All 5 reported cases of hyperthyroidism in patients on Keytruda® (EAER 0.00124), were resolved before switching to Pembroria®. No infusion-related reactions or deaths due to ImARs have been reported. The objective response rate was comparable – 104 (32.6%) and 90 (29.2%) patients оn Keytruda® and Pembroria® therapy, respectively. Most patients maintained disease control after switching to Pembroria® [progression was recorded in 29 (9.4%) patients after switching to a biosimilar].

Conclusion. The safety profiles of Keytruda® and Pembroria® were satisfactory and comparable in this study. Switching from therapy with Keytruda® to Pembroria® is not accompanied by an increase in the frequency or severity of ImARs. Switching from Keytruda® to Pembroria® maintains disease control in most patients.

作者简介

Evgeny Choynzonov

Cancer Research Institute – branch of the Tomsk National Research Medical Center of the Russian Academy of Sciences; Siberian State Medical University

编辑信件的主要联系方式.
Email: center@tnimc.ru
ORCID iD: 0000-0002-3651-0665

D. Sci. (Med.), Prof., Acad. RAS

俄罗斯联邦, Tomsk; Tomsk

Alexander Fedenko

Hertsen Moscow Oncology Research Institute – branch of the National Medical Research Radiological Centre

Email: center@tnimc.ru
ORCID iD: 0000-0003-4927-5585

D. Sci. (Med.), Prof.

俄罗斯联邦, Moscow

Natalia Falaleeva

Tsyb Medical Radiological Research Center – branch of the National Medical Research Radiological Centre

Email: center@tnimc.ru
ORCID iD: 0000-0002-0023-4216

D. Sci. (Med.)

俄罗斯联邦, Obninsk

Tatiana Andreeva

Smolensk Regional Oncologic Clinical Dispensary

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Smolensk

Sergei Afanas'ev

Cancer Research Institute – branch of the Tomsk National Research Medical Center of the Russian Academy of Sciences

Email: center@tnimc.ru

D. Sci. (Med.), Prof.

俄罗斯联邦, Tomsk

Zelimkhan Bakaev

Khimki Hospital

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Khimki

Danila Valiev

City Clinical Hospital No. 8

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Chelyabinsk

Aleksandr Volkov

PET Technology Center LLC

Email: center@tnimc.ru

Chief doctor

俄罗斯联邦, Ufa

Larisa Kolomiets

Cancer Research Institute – branch of the Tomsk National Research Medical Center of the Russian Academy of Sciences

Email: center@tnimc.ru

D. Sci. (Med.), Prof.

俄罗斯联邦, Tomsk

Tatiana Krashikhina

Moscow Center for Restorative Treatment LLC

Email: center@tnimc.ru

Cand. Sci. (Med.)

俄罗斯联邦, Khimki

Sergei Miller

Cancer Research Institute – branch of the Tomsk National Research Medical Center of the Russian Academy of Sciences

Email: center@tnimc.ru

D. Sci. (Med.)

俄罗斯联邦, Tomsk

Viktoriia Mikhaliuk

Nizhnevartovsk Oncologic Dispensary

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Nizhnevartovsk

Andrei Ogloblin

Oryol Oncological Dispensary

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Oryol

Svetlana Orlova

Republican Clinical Oncologic Dispensary

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Cheboksary

Stanislav Pataliak

Cancer Research Institute – branch of the Tomsk National Research Medical Center of the Russian Academy of Sciences

Email: center@tnimc.ru

Cand. Sci. (Med.)

俄罗斯联邦, Tomsk

Ilya Pokataev

Yudin Moscow City Hospital

Email: center@tnimc.ru
ORCID iD: 0000-0001-9864-3837

D. Sci. (Med.)

俄罗斯联邦, Moscow

Nataliia Popova

Cancer Research Institute – branch of the Tomsk National Research Medical Center of the Russian Academy of Sciences

Email: center@tnimc.ru

 Cand. Sci. (Med.)

俄罗斯联邦, Tomsk

Olesia Rebrina

Smolensk Regional Oncologic Clinical Dispensary

Email: center@tnimc.ru

oncologist

俄罗斯联邦, Smolensk

Rustem Safin

Sigal Republican Clinical Oncological Dispensary

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Kazan

Irina Stradaeva

PET-Technology LLC

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Balashikha

Iuliia Trefilova

Perm Krai Clinical Hospital

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Perm

Inessa Usol'tseva

Sakhalin Regional Oncologic Dispensary

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Yuzhno-Sakhalinsk

Evgenii Usynin

Cancer Research Institute – branch of the Tomsk National Research Medical Center of the Russian Academy of Sciences

Email: center@tnimc.ru

D. Sci. (Med.)

俄罗斯联邦, Tomsk

Sergey Sharov

Clinical Oncologic Dispensary No. 1

Email: center@tnimc.ru
ORCID iD: 0000-0002-8715-2992

Cand. Sci. (Med.)

俄罗斯联邦, Krasnodar

Denis Iukal'chuk

Regional Oncologic Dispensary

Email: center@tnimc.ru

Department Head

俄罗斯联邦, Irkutsk

Aishat Iasieva

Yudin Moscow City Hospital

Email: center@tnimc.ru

oncologist

俄罗斯联邦, Moscow

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2. Fig. 1. Immune-mediated adverse reactions (ImARs) during therapy with Keytruda® and Pembroria®

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