New research suggests that chemotherapy treatments for recurrent high-grade gliomas indicated by an assay-guided tool called ChemoID can boost median survival, compared with physician choice.
The randomized, phase 3 trial results were presented at the annual meeting of the American Association for Cancer Research.
Over a median follow-up of 9 months, median overall survival in the ChemoID group was 12.5 months (95% confidence interval, 10.2-14.7), compared with 9 months (95% CI, 4.2-13.8) in the group whose treatments were chosen by physicians (P = .010).
"While the prognosis is very dismal, we're still providing a 3.5-month benefit in the guided arm versus physician choice," said study coauthor Jagan Valluri, PhD, professor of cellular biology and integrative medicine at Marshall University, Huntington, W. Va.
As Valluri noted, patients with recurrent high-grade gliomas typically have failed radiation and are left with poor prognoses. Fewer than one in four patients respond to chemotherapy at this point, he said, and the response is inconsistent from patient to patient.
"We developed ChemoID since cancer is very unique," he said, "and any kind of chemotherapy should be tailored to each individual patient on a case-by-case basis."
The ChemoID tool, a proprietary assay, tests the response of patient cells to various chemotherapy treatments. A test costs $3,500, and some insurers cover it, Valluri said.
For the new study, researchers randomly assigned 50 patients with grade III/IV recurrent glioma to be treated with chemotherapy chosen by physicians or chemotherapy recommended by the ChemoID tool.
Risk of death in the ChemoID group was lower than in the physician-guided group (hazard ratio, 0.44; 95% CI, 0.24-0.81; P = .008), and median progression-free survival was higher in the ChemoID group (10.1 months vs. 3.5 months; 95% CI, 4.8-15.4 vs. 1.9-5.1; HR, 0.25; 95% CI, 0.14-0.44; P < .001).
"We want the treating physician to have actionable tools in front of them before they treat the patient," Valluri said. "We want this assay to become mainstream and part of the standard care workup."
The study is funded by Cordgenics, where Valluri serves as chief operating officer.
This article originally appeared on MDedge.com, part of the Medscape Professional Network.
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Cite this: Randy Dotinga. Assay-Guided Chemo in Recurrent Glioma Linked to Longer Survival - Medscape - Apr 18, 2022.