Prognostic value of humbug gene overexpression in stage II colon cancer.

Prognostic value of humbug gene overexpression in stage II colon cancer. Research Abstract Details 

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Prognostic value of humbug gene overexpression in stage II colon cancer. Abstract Text:

JiYi Wang,Suzanne M de la Monte,Edmond Sabo,Sripathi Kethu,Rosemarie Tavares,Mark Branda,Lelia Simao,Jack R Wands,Murray B Resnick,

Overexpression of aspartyl (asparaginyl) beta-hydroxylase (AAH) has been demonstrated in hepatocellular carcinoma, cholangiocarcinoma, and pancreatic carcinoma. AAH has an important role in regulating cell motility and invasiveness. Humbug is a truncated homolog of AAH, with a role in calcium regulation. The present study examines the prognostic use of AAH and humbug gene expression in stage II colon cancer. One hundred thirty cases of TNM stage II colon carcinoma were retrieved from the Rhode Island Hospital pathology archives. Tissue microarrays were immunostained with the FB50 and 15C7 monoclonal antibodies generated to recombinant AAH. However, FB50 also recognizes humbug. In addition, AAH and humbug expression was analyzed in samples of colon cancer and adjacent normal mucosa by real-time quantitative reverse transcriptase-polymerase chain reaction. Humbug (FB50) expression was localized to the tumor cytoplasm, whereas normal colonic epithelium did not exhibit significant immunoreactivity. Humbug staining was detected in 85% of the neoplasms, 23% of which stained strongly. Strong humbug immunoreactivity positively correlated with nuclear grade (P = .006) and inversely with survival (P = .027). In contrast to humbug, AAH (15C7) immunoreactivity was seen in normal and neoplastic epithelium. There was no correlation between AAH immunoreactivity and tumor grade, or survival. Correspondingly, reverse transcriptase-polymerase chain reaction studies demonstrated up-regulation of humbug but not AAH in 95% of colon carcinomas relative to adjacent colon cancer-free mucosa (P < .0001). This study demonstrates that high levels of humbug immunoreactivity in colon carcinomas correlate with histologic grade and tumor behavior, suggesting that humbug can serve as a prognostic biomarker of TNM stage II colon cancers. In addition, molecular studies demonstrated that the increased levels of FB50 detected were due to humbug, as opposed to AAH overexpression.

Prognostic value of humbug gene overexpression in stage II colon cancer. Publishing Authors By Initials

J Wang,SM de la Monte,E Sabo,S Kethu,R Tavares,M Branda,L Simao,JR Wands,MB Resnick,

For similar investigative techniques: chemistry, analytical: microchip analytical procedures: microarray analysis: tissue array analysis research abstracts see: investigative techniques: chemistry, analytical: microchip analytical procedures: microarray analysis: tissue array analysis research

PUBMED ID PMID:

MEDLINE DATE:

Prognostic value of humbug gene overexpression in stage II colon cancer. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Human pathology

VOLUME: 38

Page Numbers: 17-25

Journal Abbreviation: Hum. Pathol.

ISSN: 0046-8177

DAY: 3

MONTH: 10

YEAR: 2006

Prognostic value of humbug gene overexpression in stage II colon cancer. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9421547

Prognostic value of humbug gene overexpression in stage II colon cancer. Keywords Mesh Terms:

KEYWORDS: Tissue Array Analysis

MESH TERMS: metabolism

Chemical & Substance for Abstract: Prognostic value of humbug gene overexpression in stage II colon cancer. Information

Substance Name: aspartic acid 2-oxoglutarate-dependent d

Registry Number: EC 1.14.11.-

Grant and Affiliation Information for Prognostic value of humbug gene overexpression in stage II colon cancer.

AFFILIATION: Department of Pathology, Liver Research Center, Rhode Island Hospital, Brown Medical School, Providence, RI 02903, USA.

Country: United States

AGENCY: United States NCI

GRANT: CA-35711

ACRONYM: CA

MEDLINETA: Hum Pathol

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