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Related to biological marker: CD11c
biomarker(1) A characteristic which is objectively measured and evaluated as an indicator of normal biological processes, pathogenic processes or pharmacologic responses to a therapeutic intervention.
(2) A molecular indicator of a specific biological property or function that can be measured in blood or other body fluids or tissues; a biochemical feature or facet that can be used to suggest the presence of a particular disease, measure its progress or the effects of treatment.
PSA for prostate cancer, Hb1a for glucose control in diabetics, troponin I for acute MI.