Cell Lysate Preparation
Cell Lysate Preparation - Related Videos
03:36
Preparation of Bacteriophage Lysate for Generalized Transduction
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2026
Source: Saragliadis, A., et al. Producing Gene Deletions in Escherichia coli by P1 Transduction with Excisable Antibiotic Resistance Cassettes. J. Vis. Exp.(2018)This video demonstrates preparation of a bacteriophage lysate containing transducing particles. A donor strain is infected, plaques form, and the soft agar overlay is processed with chloroform to yield a clarified lysate for downstream analysis.
08:32
Preparation of Pooled Human Platelet Lysate (pHPL) as an Efficient Supplement for Animal Serum-Free Human Stem Cell Cultures
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Cited by 133 •
2009
Human platelet lysate is a rich source of growth factors and a potent supplement in cell culture. This protocol presents the process of preparing a large pool of human platelet lysate by starting from platelet rich plasma, performing several freeze-thaw cycles and depleting the platelet fragments.
08:33
Cell-Free In Vitro mRNA Translation In Drosophila Lysates
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2026
Here, we provide details on how to prepare lysates and perform in vitro translation using Drosophila embryos.
04:15
Extracting Host Cell Lysate from Infected Host Cells Cultured in a Permeable Membrane System
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2025
This video demonstrates a permeable membrane insert system to investigate the impact of bacterial toxins on host cells in a controlled and isolated manner. This approach allows for the selective exposure of the cells to the toxins while maintaining a physical separation that mimics the natural host-pathogen interaction.
04:08
Purification of Bacteriophages from Bacterial Lysate
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2026
Source: Pett, N., et al. T4 Bacteriophage and E. coli Interaction in the Murine Intestine: A Prototypical Model for Studying Host-Bacteriophage Dynamics In Vivo. J. Vis. Exp. (2024)This video demonstrates the purification of bacteriophages from bacterial cell lysates using sequential centrifugation, membrane filtration, chloroform extraction, centrifugal filtration, and buffer exchange to obtain a purified phage preparation.
FAQs
Different disruption strategies release cellular contents with different effects on sample integrity. Mechanical disruption, detergents, enzymatic digestion, and osmotic shock can be selected according to the molecules or structures being studied. The choice influences extraction efficiency and helps determine whether proteins, nucleic acids, metabolites, or organelles remain suitable for subsequent analysis.
A suitable buffer provides the chemical environment needed to support extraction and preserve released cellular components. Detergents contribute by chemically disrupting cellular structures, while the overall lysis conditions must remain compatible with the intended analysis. Matching the buffer and detergent system to the target improves reproducibility and helps maintain material for downstream assays.
Temperature control and management of protease activity are central to preserving target molecules after cells are disrupted. Without appropriate control, released proteins may become less suitable for analysis, reducing sample integrity and consistency. Maintaining these conditions during preparation supports reliable results in applications such as Western blotting, enzyme assays, immunoprecipitation, and mass spectrometry.
Researchers should compare these approaches when the desired cellular components or downstream measurements require different extraction conditions. Mechanical disruption, chemical detergents, enzymatic digestion, and osmotic shock represent distinct ways to open cells. Evaluating them helps identify a strategy that balances extraction efficiency with preservation of proteins, nucleic acids, metabolites, or organelles.
A typical workflow begins by selecting a suitable buffer and disruption strategy for the intended target, followed by controlled cell breakage. Temperature and protease activity are managed during preparation to protect the released material. The resulting lysate is then directed to an appropriate analysis, such as protein, nucleic acid, metabolite, or organelle-focused testing.
Downstream requirements should guide both the disruption approach and the buffer conditions. Western blotting, enzyme assays, immunoprecipitation, mass spectrometry, and nucleic acid analysis may each require lysates with suitable integrity and extraction efficiency. Designing preparation around the intended method reduces incompatibility and improves the reliability of the information obtained from the sample.
Prepared lysates provide material for studying cellular composition, signaling, gene expression, and disease-related molecular changes. Their contents can also support analysis of proteins, nucleic acids, metabolites, and organelles through complementary laboratory methods. Careful preparation is therefore important not only for releasing cellular material, but also for making biological comparisons reproducible and interpretable.