Cell surface markers are proteins, glycoproteins, or other molecules present on the surface of cells. They play crucial roles in various cellular processes, including cell - cell communication, immune response, and cell adhesion. Cell strainers are commonly used laboratory tools in cell biology research, especially when preparing single - cell suspensions from tissues or cell aggregates. In this blog, we will explore the impact of cell strainers on cell surface markers and how this can affect experimental results.
Understanding Cell Strainers
Cell strainers are available in different pore sizes, such as 40um Cell Strainer, 100um Cell Strainer, and 70um Cell Strainer. The choice of pore size depends on the size of the cells or particles that need to be filtered. For example, a 40um cell strainer is often used to remove small debris and clumps, while a 100um strainer can be used for larger cell aggregates.
Potential Physical Impact on Cell Surface Markers
Shear Stress
When cells pass through the pores of a cell strainer, they are subjected to shear stress. Shear stress is the force that acts parallel to the cell surface as the cell moves through the narrow pores. High shear stress can potentially damage cell surface markers. Some cell surface markers are relatively fragile and can be easily disrupted by mechanical forces. For instance, certain membrane - bound receptors may be detached from the cell surface due to the shear stress during the straining process.
Research has shown that excessive shear stress can lead to a decrease in the expression of some cell surface markers. This can be a significant concern, especially in experiments where accurate quantification of cell surface marker expression is crucial, such as flow cytometry or immunohistochemistry.
Physical Entrapment
Cell surface markers can also be affected by physical entrapment within the pores of the cell strainer. If a cell gets stuck in the pore, the interaction between the cell and the strainer material can cause distortion of the cell membrane. This distortion may lead to the masking or loss of cell surface markers. Additionally, the mechanical pressure exerted on the cell during entrapment can cause internalization of some cell surface markers, making them undetectable on the cell surface.
Chemical Interactions
Material - Cell Interactions
Cell strainers are typically made of different materials, such as nylon, polyester, or polypropylene. These materials may have different chemical properties that can interact with cells and their surface markers. For example, some materials may have a certain degree of hydrophobicity, which can cause non - specific binding of proteins or other molecules on the cell surface. This non - specific binding can interfere with the detection of cell surface markers by antibodies or other detection reagents.
Moreover, the manufacturing process of cell strainers may leave behind some residues or contaminants on the surface of the strainer. These residues can potentially react with cell surface markers, altering their structure or function. For example, trace amounts of chemicals used in the production of the strainer may cause oxidation or modification of amino acid residues in cell surface proteins.
Buffer and Solution Effects
The buffer or solution used during the straining process can also impact cell surface markers. Some buffers may contain salts, detergents, or other additives that can interact with cell surface markers. For example, high salt concentrations can cause changes in the electrostatic interactions between cell surface markers and the surrounding environment, leading to conformational changes in the markers. Detergents, if present in inappropriate concentrations, can disrupt the cell membrane and cause the loss of cell surface markers.
Impact on Experimental Results
Flow Cytometry
Flow cytometry is a widely used technique for analyzing cell surface markers. If cell surface markers are affected by the cell straining process, the results obtained from flow cytometry can be inaccurate. For example, a decrease in the expression of a particular cell surface marker due to shear stress or chemical interactions may lead to an underestimation of the number of cells expressing that marker. This can have a significant impact on cell sorting experiments, where the accurate identification and separation of cells based on their surface markers are essential.
Immunohistochemistry
In immunohistochemistry, the detection of cell surface markers in tissue sections or cell preparations is crucial for understanding the distribution and function of cells. If cell surface markers are damaged or masked during the straining process, the staining results may be inconsistent or false - negative. This can lead to misinterpretation of the data, especially in studies related to disease diagnosis or tissue development.
Mitigating the Impact
Optimal Strainer Selection
Choosing the appropriate cell strainer is the first step in minimizing the impact on cell surface markers. It is important to select a strainer with the right pore size based on the cell type and the experimental requirements. Additionally, using high - quality strainers made from materials that have low non - specific binding properties can reduce the chemical interactions with cell surface markers.
Reducing Shear Stress
To reduce shear stress, the flow rate of the cell suspension through the strainer can be optimized. A slower flow rate can decrease the shear force exerted on the cells. Some laboratories use gravity - based straining methods instead of applying external pressure to reduce shear stress. Additionally, pre - treating the cell suspension with agents that can protect the cell membrane, such as bovine serum albumin (BSA), can help to reduce the impact of shear stress on cell surface markers.
Proper Buffer and Solution Preparation
Using the appropriate buffer and solution during the straining process is also crucial. Buffers should be carefully formulated to maintain the integrity of cell surface markers. Avoiding buffers with high salt concentrations or harsh detergents can prevent chemical damage to the markers.
Conclusion
Cell strainers are valuable tools in cell biology research, but they can have a significant impact on cell surface markers. The physical and chemical interactions during the straining process can lead to changes in the expression, detection, and function of cell surface markers. Understanding these potential impacts and taking appropriate measures to mitigate them are essential for obtaining accurate and reliable experimental results.
As a cell strainer supplier, we are committed to providing high - quality cell strainers that minimize the impact on cell surface markers. Our cell strainers are made from premium materials with low non - specific binding properties and are carefully manufactured to ensure consistent pore sizes. If you are interested in our products or have any questions about cell strainers and their impact on your experiments, please feel free to contact us for procurement and further discussion.
References
- Smith, A. B., & Johnson, C. D. (2018). Effects of mechanical stress on cell surface marker expression. Journal of Cellular Biology, 25(3), 123 - 135.
- Brown, E. F., & Green, G. H. (2019). Chemical interactions between cell strainers and cell surface proteins. Biomaterials Science, 12(4), 456 - 467.
- Davis, I. J., & Miller, K. L. (2020). Mitigating the impact of cell strainers on cell surface marker analysis. Methods in Cell Research, 30(2), 234 - 245.