Udp-glucose dehydrogenase as a novel field-specific candidate biomarker of prostate cancer.
Uridine diphosphate (UDP)-glucose dehydrogenase (UGDH) catalyzes the oxidation of UDP-glucose to yield UDP-glucuronic acid, a precursor for synthesis of glycosaminoglycans and proteoglycans that promote aggressive prostate cancer (PC) progression. The purpose of our study was to determine if the UGDH expression in normal appearing acini (NAA) from cancerous glands is a candidate biomarker for PC field disease/effect assayed by quantitative fluorescence imaging analysis (QFIA). A polyclonal antibody to UGDH was titrated to saturation binding and fluorescent microscopic images acquired from fixed, paraffin-embedded tissue slices were quantitatively analyzed. Specificity of the assay was confirmed by Western blot analysis and competitive inhibition of tissue labeling with the recombinant UGDH. Reproducibility of the UGDH measurements was high within and across analytical runs. Quantification of UGDH by QFIA and Reverse-Phase Protein Array analysis were strongly correlated (r = 0.97), validating the QFIA measurements. Analysis of cancerous acini (CA) and NAA from PC patients vs. normal acini (NA) from noncancerous controls (32 matched pairs) revealed significant (p < 0.01) differences, with CA (increased) vs. NA, NAA (decreased) vs. NA and CA (increased) vs. NAA. Areas under the Receiver Operating Characteristic curves were 0.68 (95% CI: 0.59-0.83) for NAA and 0.71 (95% CI: 0.59-0.83) for CA (both vs. NA). These results support the UGDH content in prostatic acini as a novel candidate biomarker that may complement the development of a multi-biomarker panel for detecting PC within the tumor adjacent field on a histologically normal biopsy specimen.
Huang
Dali
D
Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, USA.
Casale
George P
GP
Tian
Jun
J
Lele
Subodh M
SM
Pisarev
Vladimir M
VM
Simpson
Melanie A
MA
Hemstreet
George P
GP
D000368:Aged; D014408:Biomarkers, Tumor / Q000378:metabolism*; D001706:Biopsy; D015153:Blotting, Western; D045744:Cell Line, Tumor; D006801:Humans; D008297:Male; D008856:Microscopy, Fluorescence; D008875:Middle Aged; D011467:Prostate / Q000201:enzymology* / Q000473:pathology; D011471:Prostatic Neoplasms / Q000175:diagnosis / Q000201:enzymology* / Q000473:pathology; D040081:Protein Array Analysis / Q000379:methods; D012680:Sensitivity and Specificity; D014533:Uridine Diphosphate Glucose Dehydrogenase / Q000378:metabolism*
D014408:Biomarkers, Tumor; D014533:Uridine Diphosphate Glucose Dehydrogenase
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