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Expanded Chinese hamster organ and cell line proteomics profiling reveals tissue-specific functionalities.
Kelley Heffner1,2, Deniz Baycin Hizal1, Natalia I Majewska1,2
1Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, USA.
Scientific Reports
|September 28, 2020
Summary
This study presents a comprehensive proteomics atlas comparing Chinese hamster ovary (CHO) cell lines and Chinese hamster tissues. The findings reveal similarities between CHO cell lines and highlight tissue-specific protein enrichments, aiding biotherapeutic development.
Area of Science:
- Proteomics
- Biotechnology
- Cell Biology
Background:
- Chinese hamster ovary (CHO) cells are crucial for biotherapeutic production.
- Understanding the proteomic landscape of CHO cells and their tissue counterparts is vital for optimizing production.
Purpose of the Study:
- To create a comprehensive proteomics atlas of Chinese hamster tissues and CHO cell lines.
- To compare proteomic profiles between CHO cell lines (CHO-S, CHO DG44) and seven Chinese hamster tissues.
- To identify tissue-specific protein enrichments and pathways relevant to biotechnology.
Main Methods:
- Quantitative proteomics using tandem mass tag (TMT) labeling and mass spectrometry.
- Analysis of two CHO cell lines (CHO-S, CHO DG44).
- Comparison with seven Chinese hamster tissues: brain, heart, kidney, liver, lung, ovary, and spleen.
Main Results:
- Identified 8470 unique proteins, showing high similarity between CHO-S and CHO DG44 cell lines.
- Observed increased proteins related to DNA replication, cell cycle, RNA, and chromosome processing in CHO cells.
- Detected distinct tissue-specific protein enrichments, including in brain (amino acid metabolism, ion transport), lung (metabolism, lipid synthesis), ovary (extracellular matrix), and heart (vasoconstriction, lipoprotein metabolism).
Conclusions:
- The proteomics atlas enhances understanding of protein function in CHO cells and hamster tissues.
- Identified tissue-specific proteomic signatures that can inform future cell engineering strategies for biotherapeutics.
- Provides a valuable resource for the biotechnology and biopharmaceutical industries.
