Acute Phase Reactants | C Reactive Protein | ESR Acute phase reactants (APRs) are proteins whose levels change during inflammation, with C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) being common markers used to detect and monitor inflammation. | Dr. Najeeb

Acute Phase Reactants vs Acute Phase Reactant. Acute phase reactants" refers to a group of proteins whose levels in the blood change (either increase or decrease) in response to inflammation, while "acute phase reactant" refers to a single protein within that group. | Dr. Najeeb

Triggers for APR. Acute phase reactants are proteins whose synthesis increases significantly in response to inflammation, infection, or tissue injury, and the acute phase response is triggered by various stimuli, including infections, trauma, surgery, and inflammatory conditions. | Dr. Najeeb