Health Boards
AnaptysBio publish phase 2 data on imsidolimab for the treatment of generalized pustular psoriasis (GPP)
Source: anaptysbio.com
Quote:
AnaptysBio, Inc a clinical-stage biotechnology company developing first-in-class antibody product candidates focused on emerging immune control mechanisms applicable to inflammation and immuno-oncology indications, today announced positive topline data from an interim analysis of its Phase 2 clinical trial of imsidolimab for the treatment of moderate-to-severe generalized pustular psoriasis (GPP), also known as the GALLOP trial. GPP is a chronic, life-threatening, rare inflammatory disease with no approved therapies.
“We are encouraged by the rapid onset, overall safety and promising efficacy profile demonstrated to date by imsidolimab for the treatment of patients suffering with GPP,” said Paul F. Lizzul, chief medical officer of AnaptysBio. “We look forward to engaging with regulatory authorities to progress imsidolimab into Phase 3, and in doing so offer a potential therapeutic intervention for these patients with high unmet medical need.”
“GPP is a life-threatening disease that seriously debilitates patient lives with no approved therapies,” said Johann Gudjonsson, Associate Professor of Dermatology, University of Michigan. “The efficacy and safety demonstrated in this trial further validates the potential for IL-36 receptor inhibition in helping GPP patients. I look forward to advancement of imsidolimab for the treatment of GPP and for other inflammatory conditions where this target and pathway may play an important role.”
Study Data
Key data available to date from the 8 patients enrolled in the GALLOP trial are as follows:
- Mean baseline value on the modified Japanese Dermatology Association severity index total score (mJDA-SI) was 9 (Table 1), body surface area covered by erythema and pustules was 24% and the serum C-reactive protein (CRP) was 56 mg/L. Patients were on average 51 years of age, 50% female and diagnosed with GPP for 4.3 years.
- Six of 8 (75%) patients treated with imsidolimab monotherapy achieved the primary endpoint of improvement in the CGI scale on Day 29. Two of 8 (25%) patients were considered to have not met the primary endpoint because they dropped out of the trial prior to Day 29.
- mJDA-SI score, which incorporates both dermatological and systemic aspects of GPP, decreased on average by 29% on Day 8 and 54% on Day 29. Erythema with skin pustules, which clinically defines GPP, decreased by 60% on Day 8 and 94% on Day 29. Serum CRP, which is an indicator of systemic inflammation, was normal (less than 5 mg/L) for 5 of the 6 patients achieving the primary endpoint on Day 29.
- Genotypic testing indicated homozygous wild-type IL-36RN, CARD14 and AP1S3 alleles for all 8 patients. We believe this suggests that imsidolimab is broadly applicable to pustular diseases irrespective of genetic drivers.
- Anti-drug antibodies were not detected as of Day 29 in any patient.
Imsidolimab was generally well-tolerated and most treatment-emergent adverse events were mild to moderate in severity and resolved without sequelae. No infusion or injection site reactions were observed. One patient dropped out of the trial due to a diagnosis of Staphylococcal aureus bacteremia in the first week, which was a serious adverse event deemed to be possibly drug-related. Because the patient was symptomatic prior to dosing and had a prior medical history of bacteremia, a common comorbidity of GPP, the Company does not believe this event is likely attributable to imsidolimab. Another patient dropped out of the study on Day 22 due to investigator reported inadequate efficacy. One patient contracted COVID-19 during the course of the trial, which was mild, unrelated to imsidolimab, and did not lead to study discontinuation.
An end-of-Phase 2 meeting, based upon data available from the 8 patients enrolled in the GALLOP trial, is anticipated in Q4 2020. In July 2020, the FDA granted orphan drug designation to imsidolimab for the treatment of GPP based upon GALLOP clinical data.
The Company plans to report full data from the GALLOP trial at a medical conference in 2021.
Source: anaptysbio.com
