Exploring the transcriptome space of a recombinant BHK cell line through next generation sequencing

Area of Science:

• Biotechnology
• Genomics
• Bioinformatics

Background:

• Baby Hamster Kidney (BHK) cell lines are crucial for producing veterinary vaccines and recombinant proteins.
• Transcriptome analysis of BHK cells is essential for optimizing biopharmaceutical production.

Purpose of the Study:

• To create a reference transcriptome for BHK cell lines.
• To identify and characterize genetic variants within BHK cell lines and Syrian hamster tissues.
• To enhance the accuracy of variant calling in high-throughput sequencing data.

Main Methods:

• RNA sequencing (RNA-seq) and Sanger EST sequencing were employed.
• Transcript sequences from a recombinant BHK cell line and Syrian hamster liver and brain were analyzed.
• Bioinformatic annotation and variant calling were performed using homology to mouse genes and KEGG pathways.

Main Results:

• A comprehensive BHK reference transcriptome was generated, with over 15,000 unique Ensembl mouse gene IDs identified.
• High coverage of cell metabolism and N-glycosylation pathways was achieved.
• Single-nucleotide variants were identified, with cell line variants indicating heterogeneity and potential missense mutations in growth signaling pathways.

Conclusions:

• The developed BHK reference transcriptome facilitates understanding and manipulation of BHK cells for biopharmaceutical production.
• Characterization of variants improves understanding of sequencing errors and enhances variant calling accuracy.
• The findings are critical for quality control and optimization in biopharmaceutical manufacturing using BHK cells.