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NCT Number: NCT07838727

A Phase 2 Study of MG-K10 in Chronic Spontaneous Urticaria

This Phase 2 study evaluates the efficacy and safety of MG-K10 in participants with chronic spontaneous urticaria inadequately controlled by second-generation H1-antihistamines. Participants are randomized 1:1 to MG-K10 or placebo for 16 weeks, followed by an 8-week follow-up period.

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Key information

Conditions

Chronic Urticaria, Idiopathic Chronic Disease Chronic Urticaria Disease Attributes Hypersensitivity Hypersensitivity, Immediate Immune System Diseases Pathologic Processes Pathological Conditions, Signs and Symptoms Skin Diseases Skin Diseases, Vascular Skin and Connective Tissue Diseases Urticaria

Age range

18 year–75 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • CSU diagnosed ≥6 months.
  • Itch and hives present continuously for >6 weeks despite second-generation H1-antihistamine treatment.
  • Before randomization：UAS7 ≥16，ISS7 ≥8，at least one investigator-assessed UAS ≥4.
  • Stable second-generation H1-antihistamine background therapy per protocol.
  • Effective contraception requirements during study and for 6 months after last dose.

Exclusion criteria

  • Chronic inducible urticaria or other urticaria/angioedema-mimicking diseases.
  • Other chronic pruritic skin disease affecting assessment.
  • Active or inadequately treated tuberculosis；acute/subacute infection.
  • Clinically significant uncontrolled diabetes，cardiac，renal，hepatic，neurologic，autoimmune，or other severe systemic disease.
  • Hypersensitivity to study drug/excipients；severe monoclonal-antibody reaction history.
  • Prior MG-K10 trial participation.

Treatment and study plan

MG-K10 Injection

Drug

MG-K10 humanized monoclonal antibody injection targeting interleukin-4 receptor alpha (IL-4Rα), administered by subcutaneous injection.

Matching Placebo

Drug

Matching placebo administered by subcutaneous injection, placebo matches MG-K10 in appearance and administration schedule to maintain blinding.

Primary outcomes

  1. Change from baseline in Urticaria Activity Score over 7 Days (UAS7) at Week 16

    Time frame: Baseline to Week 16

    UAS7 is the sum of daily itch severity and hive severity scores over 7 days, with total scores ranging from 0 to 42. The change from baseline at Week 16 will be compared between MG-K10 and placebo.

Secondary outcomes

  1. Change from baseline in Itch Severity Score over 7 Days (ISS7) at Week 16

    Time frame: Baseline to Week 16

    The Itch Severity Score over 7 Days (ISS7) is the sum of the daily itch severity scores over 7 consecutive days. Each daily itch severity score ranges from 0 to 3, where 0 indicates no itch and 3 indicates intense itch. The total ISS7 ranges from 0 to 21, where 0 indicates no itch and 21 indicates the most severe itch. Higher ISS7 scores indicate worse itch severity. Change from baseline is calculated as the ISS7 at Week 16 minus the baseline ISS7; a negative change indicates improvement.

  2. Change from baseline in Hives Severity Score over 7 Days (HSS7) at Week 16

    Time frame: Baseline to Week 16

    The Hives Severity Score over 7 Days (HSS7) is the sum of the daily hives severity scores over 7 consecutive days. Each daily hives severity score ranges from 0 to 3, where 0 indicates no hives, 1 indicates fewer than 20 hives per 24 hours, 2 indicates 20 to 50 hives per 24 hours, and 3 indicates more than 50 hives per 24 hours or large confluent areas of hives. The total HSS7 ranges from 0 to 21. Higher HSS7 scores indicate greater hives severity and worse outcome. Change from baseline is calculated as the HSS7 at Week 16 minus the baseline HSS7; a negative change indicates improvement.

Other outcomes

  1. adverse events

    Time frame: Baseline to Week 24

    Adverse events will be assessed from the first administration of study intervention through the protocol-specified follow-up period. The number of participants experiencing at least one adverse event will be summarized by treatment group.

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Sponsors and collaborators

Lead sponsor

Shanghai Mabgeek Biotech.Co.Ltd

Industry

Registry information

Official study title

A Randomized, Double-Blind, Placebo-Controlled Phase II Clinical Study to Evaluate the Efficacy and Safety of MG-K10 Humanized Monoclonal Antibody Injection in Subjects With Chronic Spontaneous Urticaria

Important dates

Study start
2026
Primary completion
2027
Study completion
2027
First posted
Sep 24, 2026
Registry last updated
Sep 24, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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