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Avalo Therapeutics Advances IL-1β Antibody in Phase 2 Trial for Hidradenitis Suppurativa with Promising Market Potential

  • Avalo Therapeutics has initiated the Phase 2 LOTUS trial evaluating AVTX-009, an anti-IL-1β monoclonal antibody, in approximately 180 adults with hidradenitis suppurativa, with topline data expected in 2026.

  • Analysts are optimistic about AVTX-009's potential, citing AbbVie's lutikizumab (IL-1α/β bispecific) Phase 2 results showing 59.5% response rates in moderate to severe HS patients who previously failed anti-TNF therapy.

  • Multiple financial firms have initiated coverage with Buy ratings, with Stifel projecting over $2 billion market potential in the US alone and setting a $36 price target, representing over 300% upside potential.

Avalo Therapeutics has launched a Phase 2 clinical trial for its lead asset AVTX-009, an anti-IL-1β monoclonal antibody targeting hidradenitis suppurativa (HS), a chronic inflammatory skin condition. The company's stock has gained significant attention from analysts who see substantial market potential for the therapy.
The Phase 2 LOTUS trial will enroll approximately 180 adults with HS to evaluate the efficacy and safety of AVTX-009 administered subcutaneously in both bi-weekly and monthly dosing regimens compared to placebo. Topline data from this study is anticipated in 2026.

Strong Scientific Rationale Based on Competitor Data

Analysts are particularly optimistic about AVTX-009's prospects following promising results from AbbVie's lutikizumab (ABT-981), an IL-1α/β bispecific antibody. In January 2024, AbbVie reported Phase 2 results showing that adults with moderate to severe HS who had previously failed anti-TNF therapy achieved significantly higher response rates with lutikizumab compared to placebo.
Patients receiving lutikizumab 300 mg every other week demonstrated a 59.5% response rate (nominal p=0.027), while those on a weekly regimen showed a 48.7% response rate (nominal p=0.197), compared to just 35% for placebo.
Stifel analyst Alex Thompson notes that AVTX-009's development is "highly de-risked given the strong evidence suggesting that IL-1β blockade represents the key driver of efficacy for lutikizumab." This suggests that Avalo's more targeted approach focusing specifically on IL-1β could potentially achieve comparable efficacy to lutikizumab while offering a more convenient dosing schedule (monthly versus bi-weekly).

Market Potential and Financial Outlook

The hidradenitis suppurativa market represents a significant opportunity for Avalo. Stifel projects that even capturing a "meaningful minority share within the growing HS market" could yield over $2 billion in US sales alone. The analyst further highlighted "significant strategic interest in the space," suggesting potential partnership or acquisition opportunities.
Jefferies analyst Kambiz Yazdi also initiated coverage with a Buy rating and a $23 price target, noting that AVTX-009 is "de-risked in part by lutikizumab data" and that "Avalo has an angle to show a differentiated profile."
Avalo's financial position appears solid, with $134.5 million in cash and cash equivalents as of December 31, 2024. The company expects these funds to support operations into at least 2027, well beyond the anticipated 2026 readout of the Phase 2 LOTUS trial.

Pipeline Expansion Plans

Beyond hidradenitis suppurativa, Avalo is evaluating AVTX-009 for additional immune-mediated diseases, with plans to announce a second indication. This strategy could further enhance the company's value proposition by expanding the potential applications of its lead asset.

Management Experience

Jefferies highlighted Avalo's leadership as a positive factor, describing the company as "a clinical stage biotechnology company focused on immunology and inflammation led by a veteran management team." This experienced leadership could prove valuable in navigating the complex clinical development and regulatory landscape.

Market Response

The market has responded positively to these developments and analyst endorsements. Avalo's stock was up 15.5% at $8.81 in recent trading, reflecting growing investor confidence in the company's prospects.
Stifel, which initiated coverage with a Buy rating and a $36 price target (representing over 300% upside from current levels), summarized their view: "Bottomline we think AVTX represents an attractive HS pure-play with a favorable risk-reward heading into topline Phase 2 data in the 2026 timeframe. Strong external HS newsflow over the next 12 months offers an additional tailwind."
As Avalo advances its clinical program for AVTX-009, the company appears well-positioned to capitalize on the growing market for hidradenitis suppurativa treatments, with strong analyst support and a solid financial foundation to support its development efforts.
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