Flashcards in Barrett's Esophagus Deck (11)
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1
what are 2 independent risk factors for esophageal adenocarcinoma?
laryngopharyngeal reflux sxs
chronic cough
2
what dz increases a person's risk for BE? what 3 lifestyle factors? the use of what rx could possibly decrease risk of EAC in BE pts?
dz: T2 DM
lifestyle factors: smoking, increasing BMI, alcohol consumption
risk of EAC in BE pts could be decreased by statin use
3
4 key objectives to tx pts w/BE?
control or correct reflux
prevent dysplasia in areas of metaplasia
increase differentiation of epithelium
promote healing of esophagitis
4
what diet modification could decrease risk of BE in men and women?
increase veggies and fruit
5
what acid could help prevent DNA damage, cytotoxicity and ROS and help to prevent dysplasia/EAC in pts w/BE?
cytoprotective hydrophilic bile aicd glycoursodeoxycholic acid
6
in relation to preventing dysplasia/EAC what are the 2 effects of PGE2 series? 3 effects of COX2?
PGE2: increase angiogenesis and cell proliferation
decrease immune surveillance
COX2: decreases apoptosis
increases invasiveness of malignant cells
increases ROS
7
what is the effect of polyphenon E (a GT extract)?
inhibits growth of transformed epithelial cells
8
what is the effect of retinoids in BE epithelial cells?
increase apoptosis in BE epithelial cells which may provide chemoprotection
9
effect of selenium on abn cells?
4 specific things it can decrease?
has been found to slow abn cell growth, prevent DNA damage and facilitate apoptosis
1. dysplasia
2. inactivation of tumor suppressor gene p53
3. aneuploidy
4. increased 4N fraction
10
what is the effect of curcuma longa?
downregulates COX-2, LOX, synthesis of PGE2
inhibits NF-kB in EAC: promotes apoptosis, increases sensitivity to chemotherapeutic agents
11
