ClinicalTrials.gg
CompletedNCT06577116Updated Aug 27, 2025

Open-Label Extension Study for Subjects With H1 Antihistamine Refractory Chronic Spontaneous Urticaria Completing Study AK006-001

A Phase 1 interventional study of AK006 IV in Chronic Spontaneous Urticaria, sponsored by Allakos Inc.. Completed at 14 sites in 2 countries. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2025-08-27.

Sponsored by Allakos Inc. · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Primary completion was May 2025, 1 year 5 months ago, and no results have been posted to the registry.
Phase
Phase 1
Study type
Interventional
Enrollment
29
Allocation
Not applicable
Ages
18 Years to 65 Years
Sex
All
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Study summary

An open label extension (OLE) study offered to subjects with Chronic Spontaneous Urticaria that have completed the AK006-001 (NCT06072157) Part C referred to as the Main study portion of the study. Qualified subjects will receive up to four doses of the study drug (AK006) through an intravenous infusion every 4 weeks. There is a 16-week follow up period once all the scheduled infusions have been completed. Subjects will be follow for evaluation of safety, tolerability, PK, immunogenicity, and clinical response.

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Conditions studied

  • Chronic Spontaneous Urticaria

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03

In context

Chronic Urticaria

194 studies on the registry are indexed under Chronic Urticaria; 46 are open to participants now.

This study's enrollment of 29 is below the median of 80 across 145 interventional studies indexed under Chronic Urticaria.

Browse Chronic Urticaria studies →

Lead sponsor

Allakos Inc. is the lead sponsor of 18 studies on the registry; none are open to participants now.

Of its 13 completed or terminated interventional studies of FDA-regulated products, 9 (69%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

Key Inclusion Criteria:

  • Enrolled in Part C of Study AK006-001 (NCT06072157) and completed the randomized, double-blind, placebo-controlled treatment period and the Day 99 Visit.
  • Acceptable demonstration of tolerance to study drug during the AK006-001 study as determined by the investigator.
  • Acceptable demonstration of protocol compliance during the AK006-001 study as determined by the investigator.
  • Female subject of and male subject with female partner of childbearing potential must agree to use a highly effective method of with \<1% failure rate or abstain from sexual activity from Screening until the end of the study, or for 16 weeks following the last dose of AK006, whichever is longer.

Key Exclusion Criteria:

  • Pregnant, breastfeeding, or planning to become pregnant while participating in the study.
  • Planned use of an approved or therapy to treat CSU other than a single 2nd- or later-generation H1-AH between 1× and 4× the licensed dose and frequency, during the study.
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
29 participants (actual)

Study arms

  • Experimental
    720mg of AK006 IV

    Subjects in this arm will receive 4 doses of 720mg of AK006 via intravenous infusion every 4 weeks.

    Drug: AK006 IV

Interventions

  • DrugAK006 IV

    Formulation for intravenous infusion

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What researchers measure

Primary outcomes

  1. Incidence of adverse events (AEs), treatment-emergent adverse events, serious adverse events, adverse events of special interest, AEs leading to discontinuation

    Time frame: Through study completion, approximately 30 weeks

  2. Incidence of clinically significant abnormal laboratory values, ECGs, and vital signs

    Time frame: Through study completion, approximately 30 weeks

Secondary outcomes

  1. AK006 serum concentrations

    Time frame: Through study completion, approximately 30 weeks

  2. AK006 Anti-drug Antibodies (ADAs)

    Number of participants with positive or negative AK006-ADAs.

    Time frame: Through study completion, approximately 30 weeks

07

Study locations

14 sites
  • Site 601-004
    Birmingham, Alabama 35209, United States
  • Site 601-014
    Bakersfield, California 93301, United States
  • Site 601-015
    Upland, California 91786, United States
  • Site 601-006
    Overland Park, Kansas 66211, United States
  • Site 601-019
    Lexington, Kentucky 40509, United States
  • Site 601-011
    St Louis, Missouri 63141, United States
  • Site 601-002
    Cincinnati, Ohio 45236, United States
  • Site 601-010
    El Paso, Texas 79912, United States
  • Site 601-013
    Greenfield, Wisconsin 53228, United States
  • Site 601-106
    Calgary, Alberta T2M 1A6, Canada
  • Site 601-107
    Niagara Falls, Ontario L2H 1H5, Canada
  • Site 601-108
    Toronto, Ontario M5G 1E2, Canada
  • Site 601-102
    Québec, Quebec G1V 4W2, Canada
  • Site 601-105
    Québec, Quebec G1W 4R4, Canada
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 27, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06577116
Lead sponsor
Allakos Inc.
Responsible party
Sponsor
First posted
Aug 29, 2024
Start date
Aug 28, 2024
Primary completion
May 21, 2025
Completion
May 21, 2025
Last update
Aug 27, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Aug 2025. You cannot join it, but the record below documents what was studied.

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