Methods and kits for monitoring Barrett's metaplasia
Disclosed are methods and kits for assessing risk of progression of Barrett's esophagus to adenocarcinoma.
1. A method of assessing risk of adenocarcinoma in a mammal with Barrett's esophagus comprising:
(a) determining the ratio of the expression of GATA6 and SPRR3 in esophageal cells from the mammal; and
(b) comparing the ratio of step (a) to the ratio of expression of GATA6 and SPRR3 in a reference selected from the group consisting of normal esophageal epithelium obtained from the mammal at the same or different time, cells characteristic of Barrett's esophagus obtained from the mammal at a different time, and a normal range established using normal esophageal epithelium obtained from a population of individuals, an increase in the ratio of step (a) relative to the ratio of the reference being indicative of increased risk of adenocarcinoma.
2. The method of claim 1 , wherein the level of expression is measured by quantitative reverse transcription-PCR.
3. The method of claim 2 , wherein the level of expression is measured by real time PCR.
4. The method of claim 1 , wherein the reference is normal esophageal epithelium obtained from the mammal at essentially the same time as the Barrett's esophageal cells.
5. The method of claim 1 , wherein the reference is normal esophageal epithelium or second Barrett's esophageal cells obtained from the mammal prior to obtaining the Barrett's esophageal cells of step (a).
6. The method of claim 1 , wherein the reference is a panel of normal esophageal epithelium obtained from a population of mammals.
7. The method of claim 1 , further comprising determining the expression of a marker selected from the group consisting of HOXB7, TCF3, S100A2, and SCCA.