A gene expression profile for vascular invasion can predict the recurrence after resection of hepatocellular carcinoma: A microarray approach
Journal
Annals of Surgical Oncology
Journal Volume
13
Journal Issue
11
Pages
1474-1484
Date Issued
2006
Author(s)
Lin J.-J.
Chen C.-C.
Hsu H.-C.
Abstract
Background: Recurrence after hepatocellular carcinoma (HCC) resection is the major obstacle to improved survival. The presence of vascular invasion (VI) in pathology specimens is a well-known unfavorable prognostic factor for HCC recurrence. Though some VI-related genes have been reported, their association with recurrence-free survival is not known. We hypothesized that a gene expression profile for VI can predict the recurrence of HCC after liver resection. Methods: Eighteen patients receiving complete HCC resection were included as a "training group". Genome-wide gene expression profile was obtained for each tumor using a microarray technique. Datasets were subjected to clustering analysis supervised by the presence or absence of VI to obtain 14 discriminative genes. We then applied those genes to execute pattern recognition using the k-Nearest Neighbor (KNN) classification method, and the best model for this VI gene signature to predict recurrence-free survival in the training group was obtained. The resulting model was then tested in an independent "test group" of 35 patients. Results: A 14-gene profile was extracted which could accurately separate ten patients with VI and eight patients without VI in the "training group". In the "test group", significant difference in disease-free survival was found between patients predicted to have and not to have recurrence (P = .02823). In patients with stage_I disease, this model can also predict outcomes (P = .000205). Conclusions: Using the 14-gene expression profile extracted from microarrays based on the presence of VI can effectively predict recurrence after HCC resection. This approach might facilitate "personalized medicine" for HCC patients after surgical resection. ? 2006 Society of Surgical Oncology.
Other Subjects
adult; article; cancer invasion; cancer recurrence; cancer staging; cancer surgery; clinical article; cluster analysis; controlled study; disease free survival; disease severity; female; gene expression profiling; genetic analysis; genome analysis; human; liver cell carcinoma; male; metastasis; microarray analysis; molecular recognition; postoperative period; prediction; prognosis; vascular tumor; Aged; Carcinoma, Hepatocellular; Female; Gene Expression Profiling; Humans; Liver Neoplasms; Male; Middle Aged; Neoplasm Invasiveness; Neoplasm Recurrence, Local; Oligonucleotide Array Sequence Analysis; Survival Rate
Type
journal article