^ AUSTIN, Texas, Dec. 24, 2024 (GLOBE NEWSWIRE) — XBiotech (NASDAQ: XBIT) has

announced today that it is expanding its rheumatology clinical program

Illnesses stop while the company tries to monitor the results of its

recently completed double-blind, placebo-controlled, randomized

Phase II study in rheumatoid arthritis. The phase II study

failed to meet its primary endpoint due to significant irregularities

It is not possible to make clear interpretation of the results difficult. XBiotech

planned to conduct further studies on arthritis and others

rheumatological diseases, including Bechterew’s disease. These studies

However, they have been put on hold for the time being to allow for the latest research results

evaluate.

The Phase II arthritis study involved approximately 230 patients with moderate arthritis

to severe rheumatoid arthritis. In the study the

The Company’s drug candidate, Natrunix, in combination with methotrexate

(MTX) investigated. The primary endpoint of the study was the response rate

American College of Rheumatology (ACR) 20 scale after 12 weeks of treatment. It

various other rheumatological examinations were also carried out,

including NRS pain ratings, arthritic joint counts, reviews

quality of life and safety. The study population was proportional

Randomized 1:1:1 into three groups: 200 mg or 400 mg Natrunix weekly in

Combination with MTX or weekly placebo with MTX.

Irregularities in the Phase II trial affected those most heavily involved

clinical centers, including numerous patients who were admitted multiple times

became. Although the study did not meet the efficacy endpoints, the

Discrepancies found during data analysis should be interpreted with caution

of the results appear necessary. The results of the study are still being published

analyzed to better understand the impact of the results and

determine how these results serve as a guide for possible further research

rheumatological studies on Natrunix can be used.

About XBiotech

XBiotech is pioneering the discovery and development of

Therapeutics based on its True Human(TM) antibody technology. The

Company has several potential products, including Natrunix, which is from

cloned from individual donors who have natural immunity to certain

have diseases. XBiotech’s campus-based headquarters is just a few steps away

Minutes from downtown Austin and includes GMP manufacturing facilities,

Research and testing laboratories, research facilities

Infectious diseases as well as quality control and clinical processes. More

For information, visit www.xbiotech.com.

Cautionary Statement Regarding Forward-Looking Statements and Study Results

This press release contains forward-looking statements, including:

Statements on management’s assessments and expectations

significant risks and uncertainties are involved. Forward-looking

Statements are subject to inherent risks and uncertainties in their prediction

future results and conditions that could cause the

actual results may differ materially from those expressed in these forward-looking statements

Statements differ from forecasts. These risks and uncertainties

are subject to the information set out in the “Risk Factors” section in some of our

SEC reports are listed. All forward-looking statements contained herein

Press releases are only valid at the time of publication

Press release. We assume no obligation to be forward-looking

Statements made after the date of this press release based on new information,

future events or for other reasons.

contact

Wenyi Wei

[email protected] (mailto:[email protected])

Tel. 737-207-4600

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