Related Experiment Video
Updated: Aug 9, 2026
Proteomic Analysis of Human Macrophage Polarization Under a Low Oxygen Environment
Published on: January 7, 2019
Protein expression profiling identifies macrophage migration inhibitory factor and cyclophilin a as potential
Michael J Campa1, Michael Z Wang, Brandon Howard
1Department of Radiology, Duke University Medical Center, Durham, North Carolina 27710, USA.
Abstract:
Current diagnostic and therapeutic strategies for lung cancer have had no significant impact on lung cancer mortality over the last several decades. This study used a matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) discovery platform to generate protein expression profiles in search of overexpressed proteins in lung tumors as potentially novel molecular targets. Two differentially expressed protein peaks at m/z 12338 and 17882 in the MALDI-TOF spectra were identified in lung tumor specimens as macrophage migration inhibitory factor and cyclophilin A, respectively. Overexpression of both proteins was confirmed by Western blotting, and cyclophilin A was localized to the tumor cells by immunohistochemistry. These data demonstrate the feasibility of using a MALDI-TOF platform to generate protein expression profiles and identify potential molecular targets for cancer diagnostics and therapeutics.
Insights
This study identified macrophage migration inhibitory factor and cyclophilin A as overexpressed proteins in lung tumors using MALDI-TOF MS. These findings offer potential new molecular targets for lung cancer diagnostics and therapeutics.
Area of Science:
- Proteomics
- Cancer Biology
- Mass Spectrometry
Background:
- Lung cancer mortality remains high despite current diagnostic and therapeutic strategies.
- Novel molecular targets are needed for improved lung cancer treatment and diagnosis.
Purpose of the Study:
- To identify novel molecular targets for lung cancer diagnostics and therapeutics.
- To evaluate the utility of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for protein expression profiling in lung tumors.
Main Methods:
- Utilized a MALDI-TOF MS discovery platform to generate protein expression profiles from lung tumor specimens.
- Identified differentially expressed protein peaks at m/z 12338 and 17882.
- Confirmed protein overexpression using Western blotting and immunohistochemistry.
Main Results:
- Two proteins, macrophage migration inhibitory factor (m/z 12338) and cyclophilin A (m/z 17882), were found to be overexpressed in lung tumors.
- Cyclophilin A was localized to tumor cells, indicating its potential role in tumor progression.
- Demonstrated the feasibility of MALDI-TOF MS for identifying potential cancer biomarkers.
Conclusions:
- MALDI-TOF MS is a viable platform for discovering protein expression profiles and identifying novel molecular targets in lung cancer.
- Macrophage migration inhibitory factor and cyclophilin A represent promising targets for future lung cancer diagnostics and therapeutics.
