[Expression and significance of interferon-inducible transmembrane protein-1 gene in Peutz-Jeghers syndrome].
OBJECTIVE
To detect the mRNA and protein expression of interferon-inducible transmembrane protein-1 (IFITM1) in Peutz-Jeghers syndrome (PJS) and investigate the role of IFITM1 in the occurrence, development and carcinogenesis of PJS polyps.


METHODS
Reverse transcription-PCR was employed to detect the mRNA expression of IFITM1 in 16 PJS polyp samples, adenomatous polyp tissues, colon adenocarcinoma samples, and normal intestinal mucosal tissues. The protein expression and localization of IFITM1 in these tissues (32 cases for each) were detected with immunohistochemical (IHC) staining.


RESULTS
The IFITM1 mRNA expression was detected in all these tissues, and the expression intensity increased in the order of normal intestinal mucosa, PJS polyp, adenomatous polyp, and colon adenocarcinoma (F=92.704, P=0.000). IHC revealed that IFITM1 protein was localized mainly on the cell membrane and in the cytoplasm, with increased expression intensity in the same order as its mRNA and showing significant differences between the tissues by several rank-sum test (Kruskal-Wallis H, chi(2)=37.036, p=0.000).


CONCLUSIONS
The expression level of IFITM1 is associated with the progression of the carcinogenetic process in PJS polyp, and can be used as a sensitive biomarker for diagnosis and prognostic evaluation of PJS.
Ma
Ya-Mei
YM
Institute of Digestive Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China. yamei.ma@163.com
Wu
Bao-Ping
BP
Xia
Ou-Dong
OD
D000293:Adolescent; D000328:Adult; D000368:Aged; D000943:Antigens, Differentiation; D015415:Biomarkers / Q000378:metabolism; D002471:Cell Transformation, Neoplastic / Q000378:metabolism*; D018450:Disease Progression; D005260:Female; D006801:Humans; D008297:Male; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D008875:Middle Aged; D010580:Peutz-Jeghers Syndrome / Q000378:metabolism* / Q000473:pathology; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D055815:Young Adult
D000943:Antigens, Differentiation; D015415:Biomarkers; D008565:Membrane Proteins; D012333:RNA, Messenger; C062010:leu-13 antigen