Allakos Announces Topline Results from its Phase 1 Trial of AK006 in Patients with Chronic Spontaneous Urticaria and Announces Restructuring

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Allakos Inc.
Allakos Inc.

– AK006 did not demonstrate therapeutic activity in CSU –
– Allakos will discontinue further development of AK006, reduce workforce by 75% and explore strategic alternatives –
– Management to host conference call and webcast today at 8:30 am E.T. –

SAN CARLOS, Calif., Jan. 27, 2025 (GLOBE NEWSWIRE) -- Allakos Inc. (Company) (Nasdaq: ALLK), today announced topline results from its phase 1 clinical trial of AK006 in chronic spontaneous urticaria (CSU).

“While AK006 was well tolerated, we are disappointed that the preclinical inhibitory effects observed did not translate to clinical benefit in patients with CSU. As a result, the Company has decided to discontinue further clinical development of AK006,” said Chin Lee, M.D, M.P.H., Chief Medical Officer of Allakos. “We express our gratitude to all of the patients, clinical trial investigators, and site coordinators in these trials.”

Phase 1 Cohort of AK006 in Patients with Chronic Spontaneous Urticaria

In the CSU cohort, 34 adult patients with moderate-to-severe CSU refractory to antihistamines with or without prior exposure to omalizumab were enrolled and randomized 2:1 to receive 720 mg of intravenous AK006 (n=23) or placebo (n=11) once every four weeks (Q4W). Eight of the 34 patients had previously received omalizumab (5 randomized to AK006, 3 randomized to placebo). The primary endpoint of the proof-of-concept cohort was safety and tolerability with therapeutic activity explored using the Urticaria Activity Score (UAS)-7 at 14 weeks.

Exploratory Efficacy Results

 

AK006 (n=23)

Placebo (n=11)

Baseline Urticaria Activity Score (UAS7)

34.4

30.5

Mean Change in UAS7

-8.2

-12.4

% UAS7=0: Complete Response

9% (2/23)

9% (1/11)


Safety Results


AK006 was well-tolerated with a favorable safety profile. There were no serious adverse events (SAEs) in subjects on AK006. Adverse events occurring in 2 or more subjects on AK006 were headache (2), infusion related reaction (2), and Covid-19 (2) vs. 1, 0, and 0, respectively, on placebo, all of which were mild-to-moderate in severity.

Restructuring Activities & Planned Actions

  • The Company plans to discontinue AK006-related activities across clinical, manufacturing, research and administrative functions and reduce its workforce by approximately 75%.

  • The Company plans to retain approximately 15 employees to explore strategic alternatives, maintain compliance with regulatory and financial reporting requirements, and wind-down the phase 1 clinical trial.

Cash Guidance
The Company ended the fourth quarter of 2024 with approximately $81 million in cash, cash equivalents, and investments (unaudited).