FOLR1 positive

Cataracts represent an under-recognized ocular adverse event associated with mirvetuximab soravtansine-gynx treatment. Although the etiology remains unclear, potentially related to mirvetuximab soravtansine-gynx exposure, ocular corticosteroids, or both, the frequency and tempo observed in this cohort underscore the need for close ophthalmologic monitoring. However, it is reassuring that cataracts can be treated with a minimally invasive procedure with generally excellent outcomes. Further research is warranted to elucidate underlying mechanisms and optimize supportive eye care strategies.

MIRV showed anticipated pharmacokinetics, safety, tolerability, and efficacy profiles in Chinese patients with FRα-positive platinum-resistant ovarian cancers, supporting its potential as a targeted therapeutic agent for this patient population.

In conclusion, NFTs show an age-dependent FOLR1 expression pattern, which likely reflects hormonal repression of FOLR1 in premenopausal women. NFT tissue from postmenopausal women is appropriate and meets the requirements for the current FOLR1 CDx assay.

Endometrial tumors with FOLR1 overexpression had a significantly higher rate of TP53 mutations (P=0.013), while all endometrial tumors with PTEN alterations were negative for FOLR1 (P=0.037). Overall, FOLR1 overexpression was associated with poor prognostic factors, such as advanced clinical stage, increased recurrence rate, higher pathologic T and N stage, poor histologic grade, larger tumor size, lymphovascular invasion, uterine serosa involvement, and shorter progression-free survival.

We report a population of high FOLR1-expressing tumor-associated macrophages (CD163 + FOLR1 + ), suggesting potential on-target, off-tumor immune editing by MIRV. A composite biomarker score derived in this cohort correlates with objective response to MIRV and pembrolizumab.

Human FOLR1-VH CAR T cells demonstrated potent antitumor activity with reduced exhaustion and enhanced persistence. These properties highlight the VH domain as a promising targeting module for next-generation CAR T-cell therapies in ovarian cancer.

Approximately half of the ovarian cancer patients in this multicenter Polish cohort demonstrated FOLR1 positivity. Although this prevalence is lower than that reported in high-grade serous carcinoma cohorts, it likely reflects histological heterogeneity and methodological differences between studies. These findings provide the first population-based evidence from Poland and support the implementation of FOLR1 testing to guide access to mirvetuximab soravtansine. Further research integrating clinical and molecular data is warranted to validate these results and assess implications for cost-effectiveness and patient outcomes.

FOLR1 is overexpressed in a large percentage of low-grade serous ovarian cancers. Mirvetuximab soravtansine may represent a novel treatment option for low-grade serous ovarian cancer patients progressing after standard treatment modalities. Clinical trials with mirvetuximab soravtansine in FOLR1-positive low-grade serous ovarian cancers are warranted.

Mirvetuximab soravtansine (MIRV) is an antibody-drug conjugate approved for the treatment of adult patients with folate receptor 1 (FRα; FOLR1) positive, platinum-resistant epithelial ovarian, fallopian tube, or primary peritoneal cancer, who have received one to three prior systemic treatment regimens...Our study highlights several factors contributing to heterogeneity in FOLR1 reporting. Future studies are needed to better understand the impact of FOLR1 heterogeneity on patient response to therapy.

Antibody design through combined glycoengineering and Fc point mutations to enhance FcγRIIIa engagement of tumor-infiltrating effector cells may be a promising strategy for developing therapies for patients with aggressive and treatment-resistant breast cancers. Assessment of Fc receptors and immune cells in breast cancer enables development of tailored engineering strategies for tumor-targeting monoclonal antibodies with enhanced immune-stimulating and anticancer attributes by combining glycoengineering and Fc mutations.

P2/3, N=600, Terminated, Sutro Biopharma, Inc. | Trial completion date: Feb 2028 --> Aug 2025 | Recruiting --> Terminated | Trial primary completion date: Aug 2027 --> Aug 2025; Due to strategic business considerations, Sutro has deprioritized the development of luveltamab tazevibulin, leading to termination of the REFRaME program. This decision is not related to any safety or efficacy concerns associated with luvelta

A positive correlation between HER2 and FOLR1 overexpression may be seen in high-grade endometrial carcinomas with aberrant p53 expression, which may extend to intratumoral heterogeneity of biomarker expression.