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Erschienen in: Japanese Journal of Radiology 11/2017

06.09.2017 | Original Article

Involvement of miR-155/FOXO3a and miR-222/PTEN in acquired radioresistance of colorectal cancer cell line

verfasst von: Hamed Manoochehri Khoshinani, Saeid Afshar, Abdolazim Sedighi Pashaki, Ali Mahdavinezhad, Safora Nikzad, Rezvan Najafi, Razieh Amini, Mohammad Hadi Gholami, Alireza khoshghadam, Massoud Saidijam

Erschienen in: Japanese Journal of Radiology | Ausgabe 11/2017

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Abstract

Purpose

Finding a novel biomarker for determining the radiosensitivity of colorectal cancer (CRC) is critical. The aim of this study is to evaluate the role of two main miRNAs including miR-222 and miR-155 in radiation response of CRC.

Materials and methods

The radioresistant CRC cell lines were established by exposing the HCT 116 cell line to fractional X-ray radiation. SubG1 fraction analysis, MTT and clonogenic assays were applied to evaluate acquired radioresistant cell line radiosensitivity. miR-222/PTEN and miR-155/FOXO3a expressions were detected by RT PCR.

Results

The clonogenic assay and sub-G1fraction analysis indicated that the RR2 sub-line was significantly more resistant than the parental cell line. MiR-222 and miR-155 were significantly upregulated in the radioresistant cell lines compared with the parental cell lines. The PTEN and FOXO3a expressions in the radioresistant cell lines were significantly higher than in the parental line.

Conclusion

These observations indicate that miR-222 and miR-155 could induce radiation resistance in colorectal cancer by targeting PTEN and FOXO3a genes, respectively. Therefore, miR-222 and miR-155 can be suggested as good biomarkers of CRC radiation response.
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Metadaten
Titel
Involvement of miR-155/FOXO3a and miR-222/PTEN in acquired radioresistance of colorectal cancer cell line
verfasst von
Hamed Manoochehri Khoshinani
Saeid Afshar
Abdolazim Sedighi Pashaki
Ali Mahdavinezhad
Safora Nikzad
Rezvan Najafi
Razieh Amini
Mohammad Hadi Gholami
Alireza khoshghadam
Massoud Saidijam
Publikationsdatum
06.09.2017
Verlag
Springer Japan
Erschienen in
Japanese Journal of Radiology / Ausgabe 11/2017
Print ISSN: 1867-1071
Elektronische ISSN: 1867-108X
DOI
https://doi.org/10.1007/s11604-017-0679-y

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