MUC1 is a useful molecular marker for malignant intraductal papillary mucinous neoplasms in pancreatic juice obtained from endoscopic retrograde pancreatography.
OBJECTIVE
Some intraductal papillary mucinous neoplasms (IPMNs) have no proliferation to malignant IPMNs, and benign IPMNs can observe the natural course without a surgical intervention. Therefore, an accurate assessment is required to determine the appropriate decision on managing malignant IPMNs.


METHODS
Quantitative real-time reverse transcription-polymerase chain reaction was performed for pancreatic juice by a LightCycler instrument focused on carcinoembryonic antigen, MUC1, and human telomerase reverse transcriptase.


RESULTS
MUC1/glyceraldehyde-3-phosphate dehydrogenase messenger RNA (mRNA) ratio in intraductal papillary mucinous carcinoma (IPMC; median, 4710.7) was significantly higher in intraductal papillary mucinous adenoma (IPMA; median, 727; P = 0.0229). Furthermore, the MUC1/glyceraldehyde-3-phosphate dehydrogenase mRNA ratio in carcinoma in situ and minimum invasive IPMC (median, 26,490) was significantly higher than that in IPMA (P = 0.0152). The cutoff level of MUC1 ratio was determined as 1600 for the division of IPMC from IPMA by the receiver-operating characteristic curve. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of MUC1 mRNA were 88.9%, 71.4%, 80.0%, 83.3%, and 81.3%, respectively.


CONCLUSIONS
Quantitative reverse transcription-polymerase chain reaction using MUC1 is useful for the detection of malignant IPMN in pure pancreatic juice.
Shimamoto
Tetsuya
T
Second Department of Surgery, Wakayama Medical University,Wakayama, Japan.
Tani
Masaji
M
Kawai
Manabu
M
Hirono
Seiko
S
Ina
Shinomi
S
Miyazawa
Motoki
M
Shimizu
Atsushi
A
Uchiyama
Kazuhisa
K
Yokoyama
Shozo
S
Tsutsumi
Masahiro
M
Yamaue
Hiroki
H
D002288:Adenocarcinoma, Mucinous / Q000175:diagnosis / Q000235:genetics*; D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis / Q000235:genetics; D021441:Carcinoma, Pancreatic Ductal / Q000175:diagnosis / Q000235:genetics*; D002291:Carcinoma, Papillary / Q000175:diagnosis / Q000235:genetics*; D002760:Cholangiopancreatography, Endoscopic Retrograde; D005260:Female; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases / Q000235:genetics; D006801:Humans; D008297:Male; D008875:Middle Aged; D018396:Mucin-1 / Q000235:genetics*; D010189:Pancreatic Juice / Q000378:metabolism*; D010190:Pancreatic Neoplasms / Q000175:diagnosis / Q000235:genetics*; D015203:Reproducibility of Results; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D012680:Sensitivity and Specificity
D014408:Biomarkers, Tumor; C060192:MUC1 protein, human; D018396:Mucin-1; D005987:Glyceraldehyde-3-Phosphate Dehydrogenases