What Is PGC and Why Does It Matter in Research?

Pepsinogen C (PGC), also known as Pepsinogen II or slow-moving pepsinogen, is a zymogen precursor of the proteolytic enzyme pepsin. PGC is predominantly expressed in the chief cells and mucous neck cells of the stomach, as well as in the duodenum and Brunner's glands. In research contexts, PGC serves as a clinically and experimentally relevant biomarker for gastric mucosal integrity, gastric atrophy, and certain gastric pathologies including gastric cancer risk assessment.

The measurement and localization of PGC expression in tissue samples supports studies of gastric mucosal biology, Helicobacter pylori infection sequelae, and the progression of atrophic gastritis. Reliable antibody tools targeting PGC are therefore essential reagents in both basic research and translational studies of the gastrointestinal tract.

Product Description and Formulation

The PGC Mouse mAb (Aladdin SKU: Ab351029) is a mouse-derived monoclonal antibody raised against Pepsinogen C. It is supplied in PBS (phosphate-buffered saline) as the sole carrier, making it compatible with a wide range of downstream immunoassay protocols where carrier-protein-free or azide-free conditions are preferred.

This product is referenced from absea catalog number KC-32365, ensuring traceability to a validated source clone. As a monoclonal antibody, it provides high epitope specificity and lot-to-lot consistency, which are critical parameters for reproducible experimental results across different studies and laboratories.

Key formulation note: The PBS-only format means this antibody does not contain stabilizing proteins such as BSA or preservatives such as sodium azide unless otherwise stated. Researchers should confirm storage conditions and any required carrier supplementation before use, particularly for long-term storage or dilution series preparation.

Recommended Applications and Usage Guidelines

Monoclonal antibodies targeting PGC are commonly employed in the following research applications. Users should validate optimal conditions empirically for their specific experimental system:

• Immunohistochemistry (IHC): Detection of PGC protein in formalin-fixed, paraffin-embedded (FFPE) or frozen gastric tissue sections to assess expression patterns and mucosal architecture.
• Immunofluorescence (IF): Visualization of PGC distribution at the cellular level in cultured gastric epithelial cell models or tissue sections.
• Western Blotting (WB): Confirmation of PGC protein size and relative expression levels across tissue lysates or cell extracts.
• Enzyme-Linked Immunosorbent Assay (ELISA): Quantitative measurement of PGC in biological fluids or tissue homogenates when configured in sandwich or direct ELISA formats.

Note: Validated application data specific to Ab351029 should be confirmed with Aladdin Scientific technical support or the product datasheet, as application compatibility may vary by lot.

Storage, Handling, and Quality Considerations

Proper storage and handling of monoclonal antibodies are essential to preserve activity and specificity. General best-practice recommendations for PBS-formulated antibodies include:

• Store at 4°C for short-term use (up to 4 weeks) or aliquot and freeze at -20°C or -80°C for long-term storage.
• Avoid repeated freeze-thaw cycles, which can lead to aggregation and loss of binding activity.
• For long-term storage without carrier protein, consider adding a carrier such as BSA (0.1–1%) or glycerol (10–50%) to stabilize the antibody, depending on the intended downstream application.
• Centrifuge briefly before use if any precipitation is observed.

As a monoclonal antibody produced in mouse, researchers using this antibody in mouse-derived tissue or cell samples should implement appropriate controls (e.g., isotype controls, secondary-antibody-only controls) to distinguish specific signal from background. Always consult the current product datasheet for lot-specific storage instructions and quality control data.