Project description:Transcriptional profiling of CHO-K1 cells comparing to in-house serum-free and suspension adapted CHO-K1 cells in the exponential phase. Goal was to determine the effects of serum on CHO-K1 cells.
Project description:RNA-sequencing was performed on H1299, HEK293T and CHO-K1 transfected with plasmids expressing EGFP and mKate in an open loop circuit (OL), w/wo compound supplementation, or with iFFL circuit.mKate has target sites for miRNAs highly expressed in the different cell lines (miRNA31 for H1299, miRNA221 for HEK293T and miRNA21 for CHO-K1)
Project description:CHO-K1 (wildtype) and CHO-K6 (stablely overexpressing human HER2) cells were terated with 10 ug/ml transtuzumab or pertuzumab and their combination for 24 h and then the whole gene expression was analyzed by cDNA array.
Project description:CHO cells have primarily been studied in bulk, assuming that these bulk samples are identical because of genetic clonality across the sample. In this study, we performed single-cell RNA sequencing on two clonal CHO-K1 cell populations with different stability phenotypes over a 90 day culture period.
Project description:Gene expression is a key determinant of phenotypes that made Chinese Hamster Ovary (CHO) cells, with their human-like glycosylation profile and high protein titers, one of the most widely used cells for the production of therapeutic proteins and biopharmaceuticals. Engineering CHO gene expression thus holds a key to improve drug quality and cost effective production. However, the success of engineering gene expression or ectopic activation of silent genes to optimize desired pathways requires accurate annotation of the underlying regulatory elements and the transcription start site (TSS). Unfortunately, to date, most TSSs of CHO-expressed genes and the ~50% of hamster genes that are silent in CHO were computationally predicted and are frequently inaccurate. To oust this hurdle, we report revised TSSs annotations for 15,308 Chinese Hamster genes and 4,145 non-coding RNAs based on experimental data from CHO K1 cells and 10 hamster tissues. In the example of the glycosyltransferase gene Mgat3, we further demonstrate how accurate annotations readily facilitate activating silent genes by CRISPRa. Together, we envision that our annotation and data from the Chinese Hamster will provide a rich resource for the CHO community, improve genome engineering efforts and additionally aid comparative and evolutionary studies.
Project description:Purpose : We performed strand-specific RNA-seq analysis of CHO cells according to adaptation trajectory to identify the specific genes responded to the suspension adaptation. Result : Cell growth, replication, and nucleotide metabolism categories were enriched in up regulated clusters whereas cellular community category which contains focal adhesion related genes were enriched in down regulated clusters CHO-K1 mRNA profiles during suspension adaptation generated by RNA sequencing, in duplicate, using Illumina MiSeq.