Did GSK's Nucala Trials In COPD Strengthen Confidence In The Eosinophil Biomarker?

US FDA was hoping Pulmonary-Allergy Drugs Advisory Committee could help provide some clarity on its use, but there still are many questions.

White blood cells in peripheral blood smear, Wright stain

The usefulness of blood eosinophil count as a biomarker may still need clarification following trials using GlaxoSmithKline PLC's Nucala (mepolizumab) in COPD, despite the US FDA's hopes to the contrary.

Members of the Pulmonary-Allergy Drugs Advisory Committee seemed befuddled by many of the questions FDA raised, including what eosinophil count...

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