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Published on: May 22, 2014
Western analysis of intracellular interleukin-8 in human mononuclear leukocytes
Veronika Miskolci1, Louis Hodgson, Dianne Cox
1Department of Anatomy and Structural Biology, Gruss-Lipper Biophotonics Center, Albert Einstein College of Medicine of Yeshiva University, 1300 Morris Park Avenue, Bronx, NY, 10461, USA, veronika.miskolci@phd.einstein.yu.edu.
Insights
This study presents a method to isolate nuclear and cytoplasmic extracts for cytokine analysis. This technique allows for the investigation of cytokine intracellular localization, such as interleukin-8 (IL-8).
Area of Science:
- Cell Biology
- Immunology
- Molecular Biology
Background:
- Cytokines are typically found in the cytoplasm but can also localize to the nucleus.
- Standard cell extract methods obscure cytokine intracellular localization.
- Understanding cytokine localization is crucial for cellular function and signaling.
Purpose of the Study:
- To describe a protocol for preparing distinct cytoplasmic and nuclear extracts.
- To enable the analysis of intracellular cytokine localization using immunoblotting.
- To adapt this method for various cell types and proteins, exemplified by interleukin-8 (IL-8).
Main Methods:
- Isolation of cytoplasmic and nuclear fractions from cells.
- Preparation of cell extracts for biochemical analysis.
- Application of immunoblotting to detect specific proteins within fractions.
Main Results:
- Successfully developed and validated a protocol for separating cytoplasmic and nuclear extracts.
- Demonstrated the intracellular localization of interleukin-8 (IL-8) in human mononuclear leukocytes.
- The protocol is adaptable for analyzing other cytokines or proteins in different cell types.
Conclusions:
- The described method provides a robust way to study cytokine intracellular localization.
- This technique overcomes limitations of traditional whole cell extract analysis.
- The protocol is versatile and applicable to a wide range of cell biology research.
Abstract:
Most cytokines are stored in the cytoplasm until their release into the extracellular environment; however, some cytokines have been reported to localize in the nucleus. Traditional whole cell extract preparation does not provide information about the intracellular localization of cytokines. Here, we describe how to prepare cytoplasmic and nuclear extracts that can be analyzed by immunoblotting. While in this chapter we use this method to analyze intracellular localization of interleukin-8 (IL-8) in human mononuclear leukocytes, this protocol is adaptable to any cell type or protein of interest.
