In cynomolgus monkeys, 2MW4691 was well-tolerated, exhibited the anticipated pharmacokinetic profile, and had a minimal impact on the peripheral T cell population. The promising preclinical results supported the further evaluation of 2MW4691 as a next-generation Treg-based therapeutics in clinical trials.
8 months ago
Preclinical • Journal • IO biomarker
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CD8 (cluster of differentiation 8) • CTLA4 (Cytotoxic T-Lymphocyte Associated Protein 4) • CCR8 (C-C Motif Chemokine Receptor 8)
Collectively, these findings suggest that CCR8 targeting represents a promising strategy for Treg depletion in cancer therapies. BAY 3375968 is currently under investigation in a Phase I clinical trial (NCT05537740).
Molecular epidemiology studies highlight HNSCC as a tumor type with a high prevalence of CCR8+ itTregs to evaluate the anti-tumor activity of an anti-CCR8 antibody. CHS-114 (SRF114) is currently being evaluated in a Phase 1 clinical trial (NCT05635643).
In dose expansion, patients with R/R non-small cell lung cancer will be enrolled in ABBV-514 monotherapy (N=12) and ABBV-514 + BDG (N=12) cohorts, and patients with R/R head and neck squamous cell carcinoma in an ABBV-514 + BDG (N=12) cohort. Enrollment initiated in November 2021, with 30 patients enrolled as of April 2023.
IPG7236 alone or in combination with PD-1 antibody exhibited significant tumor suppression effects in the mouse xenograft model of human breast cancer. IPG7236 is a promising clinical candidate that targets CCR8 with excellent in vitro ADMET properties, pharmacokinetics, safety profiles, and in vivo efficacy.
HBM1022 exhibits a potent antitumor activity as monotherapy and in combination with anti-PD (L)1 antibodies. HBM1022 has favorable pharmacokinetic properties and an excellent safety profile in cynomolgus monkey, which suggests a potential good safety profile in human.
To conclude, LM-108 is a novel Fc-optimized CCR8 antibody that selectively depletes tumor infiltrating Tregs thereby improving anti-tumor immune response either as monotherapy or combination therapy. Thus, LM-108 can be a promising therapeutic approach to overcome ICI resistance in cancer patients.
We are currently exploring the significance of these distinct populations and the impact of ZL-1218-mediated depletion of both CCR8 high- and CCR8 low-expressing subsets in multiple indications. Together, these data support the advancement of ZL-1218 into clinical evaluation as a novel therapeutic candidate to treat human solid tumors.
We also discuss the possibility of targeting the function or deleting a key subset of T that are CCR8 by monoclonal antibodies to CCR8. These cells are preferentially abundant in several tumors and are likely to be the key drivers in suppressing anti-cancer immune reactivity.
Nevertheless, such prognostic benefit is lost in the presence of highly-suppressive CCR8 ICOS IRF4+ effector Tregs. Thus, combinatorial strategies aiming at boosting Trm function and infiltration while relieving from Treg-mediated immunosuppression should be investigated to achieve proper tumor control in luminal-like BCs.