FDA Approves First Liquid Biopsy Next-Generation Sequencing Companion Diagnostic Test

US Food and Drug Administration (FDA)

The U.S. Food and Drug Administration approved the first liquid biopsy companion diagnostic that also uses next-generation sequencing (NGS) technology to identify patients with specific types of mutations of the epidermal growth factor receptor (EGFR) gene in a deadly form of metastatic non-small cell lung cancer (NSCLC). This is the first approval to combine two technologies — NGS and liquid biopsy — in one diagnostic test in order to guide treatment decisions.

“Approval of a companion diagnostic that uses a liquid biopsy and leverages next-generation sequencing marks a new era for mutation testing,” said Tim Stenzel, M.D., Ph.D., director of the Office of In Vitro Diagnostics and Radiological Health in the FDA’s Center for Devices and Radiological Health.

“In addition to benefitting from less invasive testing, patients are provided with a simultaneous mapping of multiple biomarkers of genomic alterations, rather than one biomarker at a time, which can translate to decreased wait times for starting treatment and provide insight into possible resistance mechanisms.”

READ:  Chester County-based Gene Therapy Company Announces First Patient Dosed in Trial for Treatment of Localized Scleroderma

The Guardant360 CDx assay utilizes two technologies. The first is called liquid biopsy, which uses a blood sample to provide health care professionals with genetic information about the patient’s tumor. It is less invasive and more easily repeatable in comparison to standard tissue biopsies.

Furthermore, liquid biopsy tests can be used in cases in which standard tissue biopsies are not feasible, for instance, due to the location of the tumor.

The second technology is NGS, which uses large-panel genetic sequencing, known as high-throughput tumor profiling.

Compared to older technologies, NGS requires only one test in order to allow clinicians better assessment of tumor composition, giving providers an advantage in evaluating which mutations are problematic.

The Guardant360 CDx assay uses NGS technology to simultaneously detect mutations in 55 tumor genes, rather than one gene at a time.

READ:  FDA Reissues Emergency Use Authorization for Certain Non-NIOSH-Approved Filtering Face-Piece Respirators Manufactured in China

While the Guardant360CDx can provide information on multiple solid tumor biomarkers, this approval is specific to its use in identifying EGFR mutations in patients who will benefit from treatment with TAGRISSO (osimertinib), an FDA-approved therapy for a form of metastatic NSCLC.

Lung cancer is the leading cause of cancer-related death among men and women in the United States, and NSCLC is the most common type of lung cancer.

Genomic findings for other biomarkers evaluated are not validated for choosing a particular corresponding treatment with this approval.

If the specific NSCLC mutations associated with the approval are not detected in the blood, then a tumor biopsy should be performed to determine if the NSCLC mutations are present.

The Guardant360 CDx assay was granted a Breakthrough Device designation, in which the FDA provides intensive interaction and guidance to the company on efficient device development.

READ:  Department of Health Announces Week-Two Rapid Antigen Test Card Distributions Across the Commonwealth

The FDA granted approval for the Guardant360 CDx test to Guardant Health.

Thanks for visiting! MyChesCo brings reliable information and resources to Chester County, Pennsylvania. Please consider supporting us in our efforts. Your generous donation will help us continue this work and keep it free of charge. Show your support today by clicking here and becoming a patron.

Buy Us a Cup of Coffee