hsa-miR-29c* is linked to the prognosis of malignant pleural mesothelioma.
The inability to forecast outcomes for malignant mesothelioma prevents clinicians from providing aggressive multimodality therapy to the most appropriate individuals who may benefit from such an approach. We investigated whether specific microRNAs (miR) could segregate a largely surgically treated group of mesotheliomas into good or bad prognosis categories. A training set of 44 and a test set of 98 mesothelioma tumors were analyzed by a custom miR platform, along with 9 mesothelioma cell lines and 3 normal mesothelial lines. Functional implications as well as downstream targets of potential prognostic miRs were investigated. In both the training and test sets, hsa-miR-29c* was an independent prognostic factor for time to progression as well as survival after surgical cytoreduction. The miR was expressed at higher levels in epithelial mesothelioma, and the level of this miR could segregate patients with this histology into groups with differing prognosis. Increased expression of hsa-miR-29c* predicted a more favorable prognosis, and overexpression of the miR in mesothelioma cell lines resulted in significantly decreased proliferation, migration, invasion, and colony formation. Moreover, major epigenetic regulation of mesothelioma is mediated by hsa-miR-29c* and was shown through downregulation of DNA methyltransferases as well as upregulation of demethylating genes. A single miR has the potential to be a prognostic biomarker in mesothelioma, and validation of these findings as well as investigation of its downstream targets may give insight for potential therapies in the future.
Pass
Harvey I
HI
Thoracic Surgery, NYU Langone Medical Center, New York, New York 10016, USA. harvey.pass@med.nyu.edu
Goparaju
Chandra
C
Ivanov
Sergey
S
Donington
Jessica
J
Carbone
Michele
M
Hoshen
Moshe
M
Cohen
Dalia
D
Chajut
Ayelet
A
Rosenwald
Shai
S
Dan
Harel
H
Benjamin
Sima
S
Aharonov
Ranit
R
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001194:Asbestos / Q000506:poisoning; D045744:Cell Line, Tumor; D005260:Female; D006801:Humans; D008297:Male; D008654:Mesothelioma / Q000209:etiology / Q000235:genetics*; D035683:MicroRNAs / Q000032:analysis* / Q000096:biosynthesis / Q000235:genetics; D008875:Middle Aged; D010997:Pleural Neoplasms / Q000209:etiology / Q000235:genetics*; D011379:Prognosis; D015203:Reproducibility of Results; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000379:methods; D014162:Transfection
C532045:MIRN29a microRNA, human; D035683:MicroRNAs; D001194:Asbestos