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C-reactive protein mRNA (CRP mRNA)

Target: CRP mRNA
Molecular classification: Acute-phase protein, Pentraxin family protein (short pentraxin), Soluble pattern recognition receptor

Overview

C-reactive protein is a pentameric acute phase protein belonging to the short pentraxin family, predominantly synthesized in the liver in response to interleukin-6 during inflammation. It plays a crucial role in host defense by binding to phosphocholine on microbes and damaged cells, activating the complement system, and modulating inflammatory responses. CRP is widely used clinically as a biomarker of infection and systemic inflammation, especially in cardiovascular and autoimmune diseases. Importantly, the mRNA encoding CRP is not used as a biomarker or therapeutic target; clinical and mechanistic relevance resides in the protein form.

Other names: CRPPentraxin-1PTX1C-reactive protein (pentraxin-related)

Mechanism of action

Reduction of CRP is generally achieved indirectly, through suppression of upstream inflammation (e.g., inhibition of cytokines like IL-6)

Biological functions

Innate immune responseOpsonizationActivation of complement pathwayFacilitation of phagocytosisClearance of necrotic and apoptotic cellsModulation of inflammation (dual pro- and anti-inflammatory roles depending on isoform)

Disease associations

Cardiovascular diseaseInflammationInfectionAutoimmune diseaseCancerRheumatic diseases

Safety considerations

Not applicable for CRP mRNA as a target; targeting CRP protein (as in CRP-lowering strategies) raises concerns regarding impairment of host defense and unclear long-term effects

Interacting drugs

No direct drugs target CRP specifically, but statins and anti-inflammatory agents decrease CRP levels as a secondary effect; experimental CRP-lowering agents have been studied.

Biomarkers

CRP level (high-sensitivity CRP, hsCRP) is used as a biomarker for inflammation, infection, and cardiovascular risk stratification

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