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Mutation in gene associated with rare eye disease also contributes to bladder cancer growth
Date:11/1/2011

New Orleans, LA Research conducted by Dr. Jayne S. Weiss, Professor and Chair of Ophthalmology at LSU Health Sciences Center New Orleans, and colleagues has found that a defect in a gene involved in a rare disease of the cornea also contributes to the progression of invasive bladder cancer. The findings are published in the November 2011 issue of the peer-reviewed journal, DNA and Cell Biology. It is the featured research of the issue, selected for the cover.

Because earlier studies, including Dr. Weiss', showed a protein called TERE1 or UBIAD1 is associated with an eye disease involving excess cholesterol as well as invasive prostate cancer, the team investigated its role in both lipid metabolism and the progression of invasive bladder cancer. TERE1 interacts with a cholesterol carrier protein and Dr. Weiss' earlier research found a TERE1 mutation in Schnyder's corneal dystrophy, a rare disease characterized by abnormal deposits of cholesterol and other lipids, or fats, in the cornea leading to progressive loss of vision. An elevated level of cholesterol in cells has also been implicated in the development and progression of breast, colon, liver, head and neck, and melanoma cancers.

The objectives of this study were to confirm that TERE1 levels are reduced in advanced bladder cancer and that TERE1 inhibits the growth of bladder cancer cells. The researchers manipulated the proteins thought to control cell stress, growth signaling, and how cholesterol and other fats are handled in cells and tested them in human bladder cancer cells in a mouse model. They found that TERE1 was reduced in a third of the invasive specimens and that when added to cells, TERE1 dramatically inhibited the development of tumors. They also showed that altering the dosage of TERE1 and another protein implicated in disease associated with triglyceride metabolism, called TBL2, regulates cholesterol in cells and that mutations in TERE1 associated with Schnyder's corneal dys
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Contact: Leslie Capo
lcapo@lsuhsc.edu
504-568-4806
Louisiana State University Health Sciences Center
Source:Eurekalert

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