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Overview Of Cell Separation And Isolation01:20

Overview Of Cell Separation And Isolation

Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.

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A Comparative Approach to Characterize the Landscape of Host-Pathogen Protein-Protein Interactions
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Residual host cell proteins: sources, properties, detection methods and data acquisition modes.

Yifan Yao1,2, Xuemei Wen1,2, Hongjuan Pan1,2

  • 1National Key Laboratory of Lead Druggability Research, Shanghai Institute of Pharmaceutical Industry, Shanghai, China.

Frontiers in Microbiology
|September 3, 2025
PubMed
Summary

Host cell proteins (HCPs) are impurities in biopharmaceuticals that pose safety risks. This review covers HCP detection methods, focusing on mass spectrometry and ELISA, and future advancements for better control.

Keywords:
characterizationdetectionhost cell proteinspretreatmentsources

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Area of Science:

  • Biopharmaceutical Manufacturing
  • Analytical Chemistry
  • Protein Chemistry

Background:

  • Host cell proteins (HCPs) are process-related impurities from host organisms in recombinant protein production.
  • Residual HCPs can cause immunogenicity, reduced drug efficacy, and long-term side effects, necessitating strict regulation.
  • Detecting trace HCPs faces challenges like wide dynamic range and protein instability.

Purpose of the Study:

  • To review the sources, properties, pretreatment, and detection methods for residual HCPs in therapeutic products.
  • To discuss current regulatory considerations for HCP control in biopharmaceuticals.
  • To explore future advancements in HCP detection and risk reduction.

Main Methods:

  • Review of existing literature on HCPs in biopharmaceutical manufacturing.
  • Analysis of mass spectrometry and enzyme-linked immunosorbent assay (ELISA) for HCP detection.
  • Discussion of sample pretreatment and data processing techniques.

Main Results:

  • HCPs are critical impurities requiring strict control in biopharmaceutical manufacturing.
  • Mass spectrometry offers high sensitivity and resolution for HCP detection, complementing ELISA.
  • Challenges in HCP detection include dynamic range and stability, with ongoing research for improvement.

Conclusions:

  • Effective detection and control of residual HCPs are crucial for biopharmaceutical safety and efficacy.
  • Future research should focus on advanced sample preparation and data analysis for enhanced sensitivity and accuracy.
  • Integrating risk assessment and process optimization can further minimize residual HCP risks.