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AbbVie Phase 2 results clear zumilokibart for Phase 3 eczema trials

AbbVie Phase 2 results clear zumilokibart for Phase 3 eczema trials

New Capabilities

All three dose regimens beat placebo at 16 weeks; mid-dose picked for Phase 3 trials

Today: AbbVie presents APEX Part B as EADV late-breaker

Overview

Updated 1 hour ago

Patients with moderate to severe atopic dermatitis on the mid-dose of zumilokibart hit 65.9% skin clearance at 16 weeks, versus 23.4% on placebo. AbbVie presented the Phase 2 results as a late-breaker at the European Academy of Dermatology and Venereology congress in Vienna on Sept. 30.

Zumilokibart is an anti-IL-13 antibody with a half-life of about 77 days, far longer than existing options. AbbVie picked the mid-dose for Phase 3 and says the goal is rapid skin and itch improvement with fewer injections. The company acquired the drug's developer, Apogee Therapeutics, for about $10.9 billion earlier this year.

Why it matters

If Phase 3 confirms these results, eczema patients could manage severe disease with a few injections a year instead of every other week.

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Key Indicators

65.9%
Mid-dose EASI-75 response at week 16
Versus 23.4% on placebo in Phase 2 APEX Part B.
$10.9B
AbbVie's acquisition price for Apogee
Cash deal at $135.11 per share, expected to close in the third quarter of 2026.
77 days
Zumilokibart's half-life
Engineered for extended half-life, enabling longer dosing intervals.
346
Patients in APEX Part B
Randomized 1:1:1:1 to low, mid, high dose, or placebo.

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Timeline

May 2026 September 2026

2 events Latest: Today
  1. AbbVie presents APEX Part B as EADV late-breaker

    Today Conference Presentation

    AbbVie confirms all dose regimens beat placebo, selects mid-dose for Phase 3, and presents 52-week APEX Part A maintenance data.

  2. Apogee reports Phase 2 APEX Part B success

    Clinical Trial

    Mid-dose zumilokibart achieved 65.9% EASI-75 at week 16 versus 23.4% placebo; all doses met the primary endpoint.

Scenarios

1

ADventure Phase 3 trials confirm zumilokibart's efficacy

Likely Resolves by Q2 2028

Discussed by: AbbVie statements; dermatologytimes.com analysis

Phase 3 ADventure 1 and 2 trials enroll about 400 patients each, testing the mid-dose against placebo with EASI-75 and IGA 0/1 as co-primary endpoints at week 16. If topline matches Phase 2, AbbVie files for approval and targets a 2029 launch.

2

Durability or safety concerns slow the program

Possible Resolves by Q2 2028

Discussed by: dermatologytimes.com; clinical observers

Maintenance dosing every three to six months has not been tested long-term, and noninfective conjunctivitis appeared in 10.6% of mid-dose patients in Phase 2. If 52-week data show waning response or new safety signals, Phase 3 timelines or the regulatory submission slip.

3

Regulatory review pushes launch past 2029

Possible Resolves by End of 2029

Discussed by: Market analysts

Even with clean Phase 3 data, FDA review, manufacturing scale-up, and label negotiations could push commercial launch beyond 2029. The extended-interval dosing schedule may draw additional safety questions before approval.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

March 2017

Dupilumab becomes the AD standard of care (2017)

The FDA approved dupilumab, the first biologic for moderate-to-severe atopic dermatitis, after trials showed a substantial share of patients on biweekly dosing reaching clear or almost-clear skin. It quickly became the top-selling AD biologic.

Then

Dupilumab became the default biologic for severe eczema within months of approval.

Now

It proved the IL-4/IL-13 pathway is the main driver of type-2 inflammation in AD, reshaping the treatment market.

Why this matters now

Zumilokibart targets the same pathway with a half-life permitting far fewer injections, the main differentiation for a late entrant.

2021-2024

IL-13 rivals enter the atopic dermatitis market (2021-2024)

LEO Pharma's tralokinumab won FDA approval in late 2021, and Eli Lilly's lebrikizumab followed in 2024. Both are anti-IL-13 antibodies competing with dupilumab, though neither displaced it as the top seller.

Then

The anti-IL-13 class grew but required dosing every two to four weeks.

Now

New anti-IL-13 entrants can win approval but must compete on more than efficacy alone.

Why this matters now

Zumilokibart enters a validated class; its extended half-life is the main point of difference.

Sources

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