Study says VeriStrat predicts response but not survival benefit from erlotinib

A study, published in the November 2012 issue of the International Association for the Study of Lung Cancer's (IASLC) Journal of Thoracic Oncology, showed the plasma test VeriStrat can predict response but not survival benefit from erlotinib. The study was conducted on a subset of patients enrolled in the NCIC Clinical Trials Group, BR.21 phase III trial of erlotinib versus placebo in previously treated advanced non-small cell lung cancer patients.

VeriStrat is a commercially available serum-based or plasma-based test using matrix-assisted laser desorption ionization mass spectrometry methods. In this study, were used from 441 of 731 enrolled patients. VeriStrat testing was successful in 98.9 percent of samples (436), classifying patients as Good or Poor. For Good patients, the median survival was 10.5 months on versus 6.6 months on placebo. For Poor patients, the median survival was 4 month for patients on erlotinib and 3.1 months for patients on the placebo.

The authors confirmed that VeriStrat was predictive for response and also looked at whether or not VeriStrat is predictive for differential versus placebo. The interaction term comparing relative benefit in the two cohorts was not significant (p = 0.48), indicating that both the Good and Poor cohorts derived similar relative benefit from erlotinib. VeriStart was prognostic for both progression free and overall survival (i.e. in patients who did not receive erlotinib).

The authors conclude that VeriStrat is able to predict response, but neither progression nor overall survival to erlotinib and is a "prognostic biomarker in previously treated patients with advanced NSCLC. Further studies are required to define the clinical utility of VeriStrat and other blood-based biomarkers in defining the appropriate patient population for therapy with erlotinib and other EGFR-based therapies."

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Pepper and halt: Spicy chemical may inhibit gut tumors

1 hour ago

Researchers at the University of California, San Diego School of Medicine report that dietary capsaicin – the active ingredient in chili peppers – produces chronic activation of a receptor on cells lining ...

Expressive writing may help breast cancer survivors

3 hours ago

Writing down fears, emotions and the benefits of a cancer diagnosis may improve health outcomes for Asian-American breast cancer survivors, according to a study conducted by a researcher at the University of Houston (UH).

Taking the guesswork out of cancer therapy

8 hours ago

Researchers and doctors at the Institute of Bioengineering and Nanotechnology (IBN), Singapore General Hospital (SGH) and National Cancer Centre Singapore (NCCS) have co-developed the first molecular test ...

Brain tumour cells found circulating in blood

9 hours ago

(Medical Xpress)—German scientists have discovered rogue brain tumour cells in patient blood samples, challenging the idea that this type of cancer doesn't generally spread beyond the brain.

International charge on new radiation treatment for cancer

10 hours ago

(Medical Xpress)—Imagine a targeted radiation therapy for cancer that could pinpoint and blast away tumors more effectively than traditional methods, with fewer side effects and less damage to surrounding tissues and organs.

User comments