Down-regulation of Bax-interacting factor 1 in human pancreatic ductal adenocarcinoma.

Abstract:

OBJECTIVE:Bax-interacting factor 1 (Bif-1) protein plays a critical role in apoptosis, mitochondrial morphogenesis, and autophagy, and its loss promotes tumorigenesis. The role of Bif-1 in pancreatic cancer has not been studied. METHODS:We determined Bif-1 expression in 82 human pancreatic ductal adenocarcinomas (PDCs) and in 82 nonmalignant pancreatic specimens (NMPs), using immunohistochemistry and tissue microarray. Bif-1 immunostain was semiquantitatively scored on a scale of 0 to 9. RESULTS:Bif-1 scores in NMP were either 6 or 9, with lower scores in only 19 (23.2%) of 82 NMPs. Low Bif-1 expression (score <6) was found in 37 (45.1%) of 82 PDCs, a proportion significantly greater than that found in NMP (P = 0.005). The expression of Bif-1 was twice as likely to be low in PDC as in NMP (relative risk = 1.95, 95% confidence interval, 1.23-3.09). Kaplan-Meier survival estimates showed no difference in survival between patients with low and high Bif-1 expression (P = 0.21, log-rank test). CONCLUSIONS:The expression of Bif-1 is downregulated in a subset of PDC. This novel finding is in agreement with the tumor suppressor function of Bif-1. The lack of association between Bif-1 expression and patient survival may be best explained by the complexity of carcinogenesis.

journal_name

Pancreas

journal_title

Pancreas

authors

Coppola D,Helm J,Ghayouri M,Malafa MP,Wang HG

doi

10.1097/MPA.0b013e318205eb03

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

433-7

issue

3

eissn

0885-3177

issn

1536-4828

journal_volume

40

pub_type

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