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Transcriptome and Proteome Profiling of Primary Human Gastric Interstitial Cells of Cajal Predicts Pacemaker Networks
Daphne Foong1, Meena Mikhael1, Jerry Zhou1
1Regenerative Medicine Laboratory, School of Medicine, Western Sydney University, Campbelltown, NSW, Australia.
Journal of Neurogastroenterology and Motility
|April 5, 2023
Summary
Interstitial cells of Cajal (ICC) are key for gastrointestinal motility. This study profiled human ICC, revealing molecular insights into their function and potential roles in motility disorders like gastroparesis.
Area of Science:
- Gastroenterology
- Cell Biology
- Molecular Biology
Background:
- Interstitial cells of Cajal (ICC) are crucial pacemaker cells for gastrointestinal (GI) motility.
- Dysfunctional ICC are implicated in GI motility disorders, impacting patient quality of life.
- Limited understanding exists regarding the molecular mechanisms of human ICC function.
Purpose of the Study:
- To investigate the transcriptome and proteome of human gastric ICC.
- To identify molecular signatures of ANO1-expressing, KITlow/CD45-/CD11B- ICC.
- To establish a molecular framework for ICC function in health and disease.
Main Methods:
- Purification of ICC from human gastric tissue using fluorescence-activated cell sorting (FACSorting).
- Characterization via immunofluorescence, real-time PCR, RNA-sequencing, and mass spectrometry.
- Bioinformatic analysis including gene ontology and protein-protein interaction networks.
Main Results:
- Real-time PCR confirmed increased ANO1 expression and reduced hematopoietic/smooth muscle markers in purified ICC.
- RNA-sequencing revealed a transcriptional profile consistent with ICC pacemaker function.
- Mass spectrometry identified a proteomic profile supporting ICC activity and ion transport.
- Protein interaction analysis predicted networks involved in pacemaker activity.
Conclusions:
- The study provides comprehensive transcriptome and proteome datasets for human gastric ICC.
- These data offer a molecular framework to understand ICC pacemaker activity.
- This research aids in elucidating the role of ICC in GI motility disorders.
