Related Experiment Video
Updated: Aug 14, 2025
V3 Stain-free Workflow for a Practical, Convenient, and Reliable Total Protein Loading Control in Western Blotting
Published on: December 30, 2013
Western blot normalization: Time to choose a proper loading control seriously
Qinhong Wang1, Wenqiang Han1, Chuanzhen Ma1
1Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, P. R. China.
Western blot normalization is crucial for reproducible research. This study introduces differential gene expression analysis and modified Ponceau S staining to identify reliable loading controls, improving experimental validity.
Area of Science:
- Biochemistry
- Molecular Biology
- Cardiovascular Medicine
Background:
- Housekeeping proteins are commonly used for Western blot normalization.
- Recent studies challenge the reliability of traditional housekeeping proteins.
- Inconsistent normalization compromises scientific research reproducibility.
Purpose of the Study:
- To propose novel Western blot normalization strategies.
- To enhance the reproducibility of scientific research findings.
- To identify and validate reliable loading controls for Western blotting.
Main Methods:
- Utilized the Gene Expression Omnibus (GEO) database and GEO2R for differential gene expression analysis.
- Evaluated the stability of housekeeping genes, including glyceraldehyde-3-phosphate dehydrogenase (GAPDH), actin, and tubulin, in ischemic heart tissues.
- Assessed the impact of sodium dodecyl sulfate and temperature on Ponceau S staining and developed a modified staining protocol.
Main Results:
- Actin and tubulin showed significant expression changes in ischemic heart tissues, unlike GAPDH.
- GAPDH reliability was further questioned through Western blot analysis.
- Unstable housekeeping genes were identified across various cardiovascular animal models.
- Modified Ponceau S staining after immunodetection yielded lower coefficients of variation compared to GAPDH normalization.
Conclusions:
- Differential gene expression analysis is a valuable tool for selecting stable housekeeping genes.
- Modified Ponceau S staining offers a more reliable loading control for Western blots.
- These methods collectively improve the reproducibility and accuracy of Western blot experiments.
