Standardized peptidome profiling of human serum for the detection of pancreatic cancer.

Abstract:

OBJECTIVE:To establish new biomarkers for accurate diagnosis of pancreatic cancer (PC) using a standardized serum peptidome profiling and compare the results with those from the tumor marker, CA 19-9. METHODS:Serum samples from 102 patients (55 with chronic pancreatitis and 47 with PC) and 56 healthy controls were collected and analyzed following a protocol that was rigorously designed to prevent preanalytical variation. Serum peptides were extracted using immobilized copper ion chromatography on a robotic platform. Mass spectra were acquired by matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry on an Autoflex II spectrometer (Bruker Daltonics, Bremen, Germany). Statistical analysis was performed using the Clinprotools 2.2 software (Bruker Daltonics) and the SPSS 15.0 software (SPSS Inc, Chicago, Ill). RESULTS:Standardized peptidome profiling showed a median coefficient of variation of 11.6% calculated using all the extracted peptides and negligible influence of sex and age on peptidome profiles. The diagnostic sensitivity was 89.9%, and the diagnostic specificity was 92.7%, using 2 serum features and CA 19-9 serum concentration. Healthy controls were differentiated from patients with PC and chronic pancreatitis, with the use of 3 features of the peptidome (diagnostic sensitivity, 98.2%; diagnostic specificity, 97.1%). CONCLUSIONS:Standardized serum peptidome profiling could be a useful tool to improve biochemical diagnosis of PC in combination with the classic tumor marker, CA 19-9.

journal_name

Pancreas

journal_title

Pancreas

authors

Zapico-Muñiz E,Farré-Viladrich A,Rico-Santana N,González-Sastre F,Mora-Brugués J

doi

10.1097/MPA.0b013e3181dfcbe5

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

1293-8

issue

8

eissn

0885-3177

issn

1536-4828

journal_volume

39

pub_type

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