Ensuring Safety Through Precise Residual Host Cell RNA Quantification

During upstream and downstream processing, genetic materials - particularly RNA - from production host cells (e.g., E. coli, HEK293) may persist in the final drug substance. These impurities, even at trace levels, pose potential immunogenicity risks and may interfere with product stability and function. As such, regulatory agencies including the FDA and EMA emphasize the importance of monitoring residual nucleic acids as part of impurity profiling and product release criteria.

Residual host cell RNA, if not adequately removed during purification, may elicit unintended immune responses, such as Toll-like receptor (TLR) - mediated inflammation. The rising complexity of modalities such as viral vectors, mRNA therapeutics, and engineered cell therapies necessitates stringent nucleic acid control strategies.

Furthermore, residual RNA may also impact downstream assays or therapeutic performance, especially in gene and cell therapies where nucleic acid-based components are integral. Accurate quantification is therefore essential for risk assessment, regulatory compliance, and ensuring product safety.

Quantitative reverse transcription PCR (RT-qPCR) are commonly employed methods for detecting residual host cell RNA in biological products. qPCR is widely regarded as the gold standard for for residual RNA quantitation due to its high sensitivity (down to picogram levels), sequence specificity, and quantitative accuracy. qPCR allows for the targeted detection of host cell-specific RNA sequences, providing a robust means of validating RNA clearance during purification.

SHENTEK has successfully developed the Residual E.coli RNA Quantitation Kit (2G), which integrates reverse transcription and fluorescent probe-based qPCR detection technology to enable one-step quantitative detection of host cell RNA from E. coli in a variety of biopharmaceutical products. This kit offers high sensitivity and complies with USP, JP, and ICH regulatory standards.

Specification - SHENTEK® Residual E.coli RNA Quantitation Kit (2G)

Range	2x10-3-2x102 pg/μL, R2 =1.000, E=104.6%
Accuracy	81.1%-107.0%, CV<30%
LOQ	0.002 pg/μL
Precision	7.4%-11.0% (<30%)
Robustness	Freeze-thaw stability over 5 cycles

Related Quality Control Products

Cat. No.	Product Name	Unit Size
1201205	SHENTEK® Residual Host Cell RNA Sample Preparation Kit	100 Extractions
1101107-1	SHENTEK® Residual E. coli DNA Quantitation Kit (2G)	100 Reactions
1104191	SHENTEK® Residual Host Cell DNA Sample Preparation Kit	100 Extractions
1301301-1	SHENTEK® E.coli (Protein Expression Strains) HCP ELISA Kit (One-step ELISA)	96 Tests
1301301-Ab01	SHENTEK® Anti-E.coli (Protein Expression Strains) HCP Antibody	1mg
1301302	SHENTEK® E.coli (K-12 & Alkaline Lysis) HCP ELISA Kit	96 Tests
1301302-Ab01	SHENTEK® Anti-E.coli (K-12 & Alkaline Lysis) HCP Antibody	1mg