UK Approves Targeted Therapy for Cervical Cancer

The Medicines and Healthcare products Regulatory Agency (MHRA) has approved tisotumab vedotin (Genmab AS) for adults with recurrent or metastatic cervical cancer.

The decision, made via the International Recognition Procedure, applies to patients whose disease has progressed after prior systemic therapy. It provides a new treatment option for a high-risk group with limited alternatives.

How the Treatment Works

Tisotumab vedotin is an antibody-drug conjugate that combines a tissue factor-directed human monoclonal antibody with monomethyl auristatin E, a microtubule-disrupting agent. The therapy targets tissue factor, which is overexpressed in a several solid tumours, including recurrent cervical cancer.

It is administered as a 30-minute intravenous infusion once every 3 weeks.

What Trials Showed

The approval is based on evidence from multiple clinical studies demonstrating tisotumab vedotin's efficacy in previously treated patients.

In the phase 2 innovaTV 204 study, 102 patients were enrolled and 101 received at least 1 dose of tisotumab vedotin. The confirmed objective response rate was 24%, including seven complete responses and 17 partial responses, demonstrating clinically meaningful activity in a heavily pretreated population.

Further evidence came from the phase 3 innovaTV-301 trial, which randomly assigned 502 patients to receive either tisotumab vedotin or investigator's-choice chemotherapy.

Median overall survival was 11.5 months with the new therapy compared with 9.5 months in the chemotherapy arm, translating to roughly a 30% reduction in the risk for death. The confirmed objective response rate was also significantly higher with tisotumab vedotin—17.8% vs 5.2%—underscoring its advantage over standard treatment options.

Safety and Tolerability

Ocular toxicity and peripheral neuropathy were the most notable adverse reactions.

Common treatment-related events in the phase 2 study included alopecia (38%), epistaxis (30%), nausea, conjunctivitis (26%), and fatigue (26%).

Grade 3 or higher treatment-related adverse events occurred in about 28% of patients. Clinicians should be alert to conjunctivitis and keratitis as well as sensory neuropathic symptoms (numbness, tingling, or a burning sensation in the hands and feet).

Julian Beach, interim executive director of healthcare quality and access at the MHRA, said that patient safety is the agency's "top priority." "We will continue to monitor its safety closely as it becomes more widely used," he added.

The Summary of Product Characteristics and Patient Information Leaflets will be published on the MHRA website within 7 days of approval.

A version of this article first appeared on Medscape.com.