Innate Pharma to Halt Lacutamab Trial; RFS Files for Bankruptcy

Innate Pharma announced several planned actions based on ongoing discussions with regulatory authorities regarding a quality issue related to the chemistry, manufacturing and controls (CMC) process.

Lacutamab will not be administered to new patients in the TELLOMAK trial until additional feedback is received from the respective regulatory agencies overseeing our clinical trial.

Until further notice, the Company will continue to treat patients who are currently enrolled in the multi-center trial, except in Italy where the clinical trial has been suspended due to the feedback from Italian regulatory authorities.

This decision is related to issues with the Company's manufacturing subcontractor, Rentschler Fill Solutions GmbH or "RFS" (now known as Impletio Wirkstoffabfullung GmbH). RFS has recently withdrawn the Certificate of Conformity of batches they have produced, including the lacutamab batch currently used in the TELLOMAK trial. RFS was granted a Good Manufacturing Practice (GMP) certificate by the Austrian regulatory agency in August 2018 and further confirmed in October 2019. In parallel, RFS filed for bankruptcy.

Lacutamab (formerly IPH4102) is a potentially first-in-class anti-KIR3DL2 humanized cytotoxicity-inducing antibody, designed for treatment of CTCL, an orphan disease. This group of rare cutaneous lymphomas of T lymphocytes has a poor prognosis with few therapeutic options at advanced stages. KIR3DL2 is an inhibitory receptor of the KIR family, expressed by approximately 65% of patients across all CTCL subtypes and expressed by up to 85% of them with certain aggressive CTCL subtypes, in particular, Sezary syndrome. It has a restricted expression on normal tissues.

Lacutamab was granted orphan drug status in the European Union and in the United States for the treatment of CTCL. In January 2019, the US Food and Drug Administration (FDA) granted Innate Pharma Fast Track designation for lacutamab for the treatment of adult patients with relapsed or refractory Sezary syndrome who have received at least two prior systemic therapies.

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