About this program
IPH4102 is a first-in-class anti-KIR3DL2 humanized cytotoxicity-inducing antibody, designed for treatment of cutaneous T-cell lymphoma (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, Sézary syndrome. It has a restricted expression on normal tissues.
IPH4102 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 IPH4102 for the treatment of adult patients with relapsed or refractory Sézary syndrome who have received at least two prior systemic therapies.
TELLOMAK, a global, multi-cohort, Phase II study evaluating the potential of IPH4102 in different subtypes of T-cell lymphomas, has been initiated in the first half of 2019 (see clinical development).
Mechanism of action of anti-KIR3DL2
The Phase II study TELLOMAK evaluating the potential of IPH4102 in different subtypes of T-cell lymphomas (TCL) has been initiated in the first half of 2019.
TELLOMAK is a global, open-label, multi-cohort Phase II clinical trial conducted in the United States and Europe. In this trial, IPH4102 is being evaluated alone and in combination with chemotherapy in patients with advanced TCL.
TELLOMAK is expected to recruit up to 250 patients, with IPH4102 evaluated:
- As a single agent in approximately 60 patients with Sézary syndrome who have received at least two prior treatments, including mogamulizumab,
- As a single agent in approximately 90 patients with Mycosis fungoides (MF) who have received at least two prior treatments, and
- In combination with standard chemotherapy (gemcitabine and oxaliplatin) in approximately 100 patients with peripheral T-cell lymphoma (PTCL) who have received at least one prior treatment.
In patients with MF and PTCL, the study is designed to evaluate the benefit of IPH4102 according to KIR3DL2 expression. The study will comprise two cohorts for each of the 2 indications, testing IPH4102 in KIR3DL2 expressing and non-expressing patients. These cohorts will follow a Simon 2-stage design that will terminate if treatment is considered futile. The Sézary syndrome arm of the study could enable the registration of IPH4102 in this indication.
The primary endpoint of the trial is objective response rate. Key secondary measures include incidence of treatment emergent adverse events, quality of life, overall response rate, progression-free survival and overall survival.
A Phase I trial has been vconducted as an open label and multicenter study, performed in Europe (France, Netherlands, United Kingdom) and in the US. Participating institutions include several hospitals with internationally recognized expertise: the Saint-Louis Hospital (Paris, France), the MD Anderson Cancer Center (Houston, Texas), the Stanford University Medical Center (Stanford, CA), the Ohio State University (Columbus, OH), the Leiden University Medical Center (Leiden, Netherlands), and the Guy’s and St Thomas’ Hospital (London, United Kingdom).
- The dose-escalation part has accrued 25 KIR3DL2-positive CTCL patients in 10 dose levels. The objective was to characterize IPH4102 safety profile, identify the Maximum Tolerated Dose (MTD) and/or the Recommended Phase 2 Dose (RP2D); the dose escalation followed an accelerated 3+3 design. Results of the dose-escalation were presented at the EORTC CLTF meeting in October 2017.
- The cohort expansion enrolled 15 patients with Sézary Syndrome and 4 tMF receiving IPH4102 at the RP2D until progression.
The primary objective of this trial was to evaluate the safety and tolerability of repeated administrations of single agent IPH4102 in this patient population. The secondary objectives include assessment of the drug’s antitumor activity. Clinical endpoints include global objective response rate, response duration and progression-free survival. Exploratory analyses are aimed at identifying biomarkers of clinical activity.
In a presentation at EORTC CLTF meeting in September 2018 and updated results presented at the 2018 ASH Annual Meeting, IPH4102 showed encouraging clinical activity, demonstrated by high response rate and long progression-free survival.
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