Gene Expression Changes in Barrett's Esophagus and Adenocarcinoma Cells After Acid or Bile Salt Exposure
Author Information
Author(s): Hao Ying, Sood Sumita, Triadafilopoulos George, Kim Jong Hyeok, Wang Zheng, Sahbaie Peyman, Omary M Bishr, Lowe Anson W
Primary Institution: Stanford University
Hypothesis
Does exposure to acid or bile salts result in gene expression changes that provide insights into malignant transformation in Barrett's esophagus and associated adenocarcinoma?
Conclusion
Short-term exposure of esophageal adenocarcinoma SEG-1 cells or primary cultures of Barrett's esophagus does not result in gene expression changes that are consistent with enhanced cell proliferation.
Supporting Evidence
- Short-term exposure to acid did not enhance cell proliferation in Barrett's adenocarcinoma cell lines.
- Gene expression changes were not consistent with those seen in esophageal adenocarcinoma.
- Primary cultures of Barrett's esophagus did not show significant gene expression changes after acid or bile salt exposure.
Takeaway
The study looked at how acid and bile salts affect cells related to Barrett's esophagus and found that these exposures don't change the genes in a way that makes the cells grow faster.
Methodology
Barrett's-associated esophageal adenocarcinoma cell lines and primary cultures of Barrett's esophageal tissue were exposed to acid or bile salts, followed by gene expression analysis using cDNA microarrays.
Potential Biases
Potential bias due to the use of established cancer cell lines that may not respond like normal Barrett's cells.
Limitations
The study may not reflect in vivo conditions, and the cell lines used may not exhibit the same changes as non-neoplastic Barrett's cells.
Participant Demographics
Patients with a history of gastroesophageal reflux for an average of 9 years.
Statistical Information
P-Value
0.00027
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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