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Celltrion announces positive top-line results from global Phase III trial of regdanvimab (CT-P59), an anti-COVID-19 monoclonal antibody treatment

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Celltrion Group today announced top-line efficacy and safety data from the global Phase III clinical trial, demonstrating that anti-COVID-19 monoclonal antibody treatment candidate, regdanvimab (CT-P59), met all primary and key secondary endpoints in patients with mild- to- moderate symptoms of COVID-19 (n=1,315). Results showed that CT-P59 significantly reduced the risk of hospitalisation or death by 72% for patients at high- risk of progressing to severe COVID-19 up to Day 28, compared to placebo, meeting the primary efficacy endpoint [3.1 vs. 11.1 %, p-value< 0.0001]. CT-P59 also significantly reduced the risk of hospitalisation or death by 70% in all patients, meeting the first key secondary endpoint [2.4 vs. 8.0 %, p-value< 0.0001].

The trial also met the other key secondary endpoints, including faster and persistent reduction in symptom duration. Patients treated with CT-P59 (40mg/kg) recovered at least 4.7 days earlier than those in the placebo-treated patients [median 9.3 vs. minimum 14 days, p-value< 0.0001] for patients at high- risk of progressing to severe COVID-19. For all patients treated with CT-P59 (40mg/kg), patients recovered 4.9 days earlier than those in the placebo-treated patients [median 8.4 vs. 13.3 days, p-value< 0.0001].

Top-line results also showed CT-P59 to have a positive safety profile, with no clinically meaningful differences between patients treated with CT-P59 (40mg/kg) and placebo-treated patients. Infusion related reactions were mild and transient, with most patients recovering within 1~3 days.

“We continue to be challenged by the COVID-19 pandemic and new variants of concern,” said Dr. HoUng Kim, Ph.D., Head of Medical and Marketing Division at Celltrion Healthcare. “As many hospitals across the globe now exceed their ability to accommodate patients due to COVID-19, it is critical that we use every resource to reduce the burden on the healthcare system. This well-controlled trial provides conclusive results demonstrating that CT-P59 can improve outcomes in people with mild- to- moderate COVID-19 and also significantly reduce the risk of hospitalisation and death. We look forward to continuing to work with regulators around the world to make CT-P59 available to more patients in need.”

Therapeutic effect of CT-P59 against B.1.351 variant (first identified in South Africa, now classified by the WHO as Beta) was updated through the publication from Biochemical and Biophysical Research Communications. According to the article, in vivo ferret challenge studies demonstrated that a therapeutic dosage of CT-P59 was able to decrease B.1.351 viral load in the upper and lower respiratory tracts, comparable to that observed for the wild type virus.1

Celltrion plans to release full Phase III data in the coming months and plans to present the data at an oral session at the 31st European Congress of Clinical Microbiology & Infectious Diseases (ECCMID), which will take place online from 9 -12 July 2021.

-ENDS -

Notes to Editors:

About Celltrion Healthcare

Celltrion Healthcare is committed to delivering innovative and affordable medications to promote patients’ access to advanced therapies. Its products are manufactured at state-of-the-art mammalian cell culture facilities, designed and built to comply with the US FDA cGMP and the EU GMP guidelines. Celltrion Healthcare endeavours to offer high-quality cost-effective solutions through an extensive global network that spans more than 110 different countries. For more information please visit: https://www.celltrionhealthcare.com/en-us.

About regdanvimab (CT-P59) and clinical trials

CT-P59 was identified as a potential treatment for COVID-19 through screening of antibody candidates and selecting those that showed the highest potency in neutralising the SARS-CoV-2 virus. In vitro and in vivo pre-clinical studies showed that CT-P59 strongly binds to SARS-CoV-2 RBD and significantly neutralise the wild type and mutant variants of concern including the Alpha UK variant (B.1.17). In in vivo models, CT-P59 effectively reduced the viral load of SARS-CoV-2 and inflammation in lung. Results from the global Phase I and II clinical trials of CT-P59 demonstrated a promising safety, tolerability, antiviral effect and efficacy profile in patients with mild- to- moderate symptoms of COVID-19.2 Celltrion also has recently commenced the development of a neutralising antibody cocktail with CT-P59 against new emerging variants of SARS-CoV-2. The research for Celltrion’s clinical trials was supported by a grant as part of the Korea Health Technology R&D Project from the Korea Health Industry Development Institute (KHIDI), funded by the ministry of Health & Welfare, Republic of Korea (grant number: HQ2xC00xx).

FORWARD LOOKING STATEMENT

Certain information set forth in this press release contains statements related to our future business and financial performance and future events or developments involving Celltrion/Celltrion Healthcare that may constitute forward-looking statements, under pertinent securities laws.

These statements may be identified by words such as “prepares”, “hopes to”, “upcoming”, ”plans to”, “aims to”, “to be launched”, “is preparing, “once gained”, “could”, “with the aim of”, “may”, “once identified”, “will”, “working towards”, “is due”, “become available”, “has potential to”, the negative of these words or such other variations thereon or comparable terminology.

In addition, our representatives may make oral forward-looking statements. Such statements are based on the current expectations and certain assumptions of Celltrion/Celltrion Healthcare's management, of which many are beyond its control.

Forward-looking statements are provided to allow potential investors the opportunity to understand management’s beliefs and opinions in respect of the future so that they may use such beliefs and opinions as one factor in evaluating an investment. These statements are not guarantees of future performance and undue reliance should not be placed on them.

Such forward-looking statements necessarily involve known and unknown risks and uncertainties, which may cause actual performance and financial results in future periods to differ materially from any projections of future performance or result expressed or implied by such forward-looking statements.

Although forward-looking statements contained in this presentation are based upon what management of Celltrion/Celltrion Healthcare believes are reasonable assumptions, there can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Celltrion/Celltrion Healthcare undertakes no obligation to update forward-looking statements if circumstances or management’s estimates or opinions should change except as required by applicable securities laws. The reader is cautioned not to place undue reliance on forward-looking statements.

References


1 Ryu DK., et al. Therapeutic effect of CT-P59 against SARS-CoV-2 South African variant. Biochemical and Biophysical Research Communications, Volume 566, 2021, Pages 135-140, https://doi.org/10.1016/j.bbrc.2021.06.016. [Last accessed June 2021]

2 Celltrion Data on file

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