Co-immunoprecipitation Assay Using Endogenous Nuclear Proteins from Cells Cultured Under Hypoxic Conditions

作者： Xiaofeng Zheng1,2, Calvin Qing Wei Ho1, Xiaowei Zheng3, Kian Leong Lee4, Katarina Gradin5, Teresa S. Pereira3, Per-Olof Berggren1,2,3, Yusuf Ali1,2 1Lee Kong Chian School of Medicine,Nanyang Technological University, 2Singapore Eye Research Institute (SERI),Singapore General Hospital, 3The Rolf Luft Research Center for Diabetes and Endocrinology, Karolinska Institutet,Karolinska University Hospital, 4Cancer and Stem Cell Biology Program,Duke-NUS Medical School, 5Department of Cell and Molecular Biology,Karolinska Institutet

简介：

Overview

This article describes a co-immunoprecipitation protocol designed to investigate protein-protein interactions between endogenous nuclear proteins under hypoxic conditions. The method is particularly useful for examining interactions between transcription factors and their transcriptional co-regulators during hypoxia.

Key Study Components

Area of Science

• Neuroscience
• Cell Biology
• Hypoxia Research

Background

• Understanding protein interactions is crucial in the study of cellular responses to hypoxia.
• Transcription factors play a significant role in gene regulation under low oxygen conditions.
• Co-immunoprecipitation allows for the analysis of these interactions in a native cellular environment.
• This protocol utilizes human embryonic kidney 293A cells to study these interactions.

Purpose of Study

• To elucidate the interactions between transcription factors and transcriptional co-regulators under hypoxic conditions.
• To provide a reliable method for studying protein interactions in a controlled hypoxic environment.
• To enhance understanding of cellular mechanisms in response to low oxygen levels.

Methods Used

• Human embryonic kidney 293A cells are cultured in specific media.
• Cells are subjected to hypoxic conditions in a glovebox.
• Co-immunoprecipitation is performed on nuclear fractions harvested under hypoxia.
• The protocol details the specific conditions and timing for optimal results.

Main Results

• The method successfully demonstrates protein interactions under hypoxic conditions.
• Key interactions between transcription factors and co-regulators were identified.
• The results provide insights into the regulatory mechanisms active during hypoxia.
• This approach can be applied to further studies in hypoxia-related research.

Conclusions

• The co-immunoprecipitation protocol is effective for studying protein interactions in hypoxic conditions.
• Understanding these interactions can lead to advancements in hypoxia research.
• This method can be adapted for various studies involving protein interactions in different cellular contexts.

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