association of the expression of miR-122-5p and its target ADAM10 with human breast cancer

MicroRNAs can regulate many biological functions. miR-122-5p has a tumor suppressor function through different molecular pathways. Also, our second hit, ADAM10, targeted by miR-122-5p, is a major determinant of HER2 shedding causing that trastuzumab cannot bind to HER2 receptors. Therefore, our anal...

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Veröffentlicht in:Molecular biology reports 2015-02, Vol.42 (2), p.497-505
Hauptverfasser: Ergün, Sercan, Ulasli, Mustafa, Igci, Yusuf Ziya, Igci, Mehri, Kırkbes, Sevil, Borazan, Ersin, Balik, Ahmet, Yumrutaş, Önder, Camci, Celalettin, Cakmak, Ecir Ali, Arslan, Ahmet, Oztuzcu, Serdar
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container_end_page 505
container_issue 2
container_start_page 497
container_title Molecular biology reports
container_volume 42
creator Ergün, Sercan
Ulasli, Mustafa
Igci, Yusuf Ziya
Igci, Mehri
Kırkbes, Sevil
Borazan, Ersin
Balik, Ahmet
Yumrutaş, Önder
Camci, Celalettin
Cakmak, Ecir Ali
Arslan, Ahmet
Oztuzcu, Serdar
description MicroRNAs can regulate many biological functions. miR-122-5p has a tumor suppressor function through different molecular pathways. Also, our second hit, ADAM10, targeted by miR-122-5p, is a major determinant of HER2 shedding causing that trastuzumab cannot bind to HER2 receptors. Therefore, our analysis upon ADAM10 expression and miR-122-5p was a good point to understand molecular mechanism of breast cancer. In our study, we investigated the expression profiles of miR-122-5p and its target ADAM10 in 71 breast cancer patients. Immunohistochemical analysis of ER, PR and HER2 gene products was used to categorize tumors in patients. Expression data and immunohistochemical findings were evaluated to comment on the relationship between miR-122-5p and ADAM10. ADAM10 expression was higher in tumor than that of normal tissue but miR-122-5p expression was lower in tumor than that of normal tissue. The expression pattern in HER2+ patients was reverse of the overall result. It can be explained like that miR-122-5p expression increases especially in HER2+ cancer cell to suppress ADAM10 shedding activity on HER2 receptor. However, increase in expression of tumor suppressor miR-122-5p is not enough to inhibit ADAM10. All in all, we can think miR-122-5p as potential regulator of ADAM10 and trastuzumab resistance. Since if we increase miR-122-5p activity together with trastuzumab administration, then HER2+ breast cancer cells may overcome trastuzumab resistance by inhibiting ADAM10 shedding activity on HER2 receptors and increase the efficiency of trastuzumab.
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Also, our second hit, ADAM10, targeted by miR-122-5p, is a major determinant of HER2 shedding causing that trastuzumab cannot bind to HER2 receptors. Therefore, our analysis upon ADAM10 expression and miR-122-5p was a good point to understand molecular mechanism of breast cancer. In our study, we investigated the expression profiles of miR-122-5p and its target ADAM10 in 71 breast cancer patients. Immunohistochemical analysis of ER, PR and HER2 gene products was used to categorize tumors in patients. Expression data and immunohistochemical findings were evaluated to comment on the relationship between miR-122-5p and ADAM10. ADAM10 expression was higher in tumor than that of normal tissue but miR-122-5p expression was lower in tumor than that of normal tissue. The expression pattern in HER2+ patients was reverse of the overall result. It can be explained like that miR-122-5p expression increases especially in HER2+ cancer cell to suppress ADAM10 shedding activity on HER2 receptor. 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source MEDLINE; Springer Nature - Complete Springer Journals
subjects 3' Untranslated Regions
ADAM Proteins - genetics
ADAM10 Protein
Adult
Aged
Amyloid Precursor Protein Secretases - genetics
Animal Anatomy
Animal Biochemistry
Base Sequence
Binding Sites
Biomarkers, Tumor
Biomedical and Life Sciences
Breast cancer
breast neoplasms
Breast Neoplasms - genetics
Breast Neoplasms - surgery
Epidermal growth factor
Female
Gene Expression Regulation, Neoplastic
genes
Histology
Humans
immunohistochemistry
Life Sciences
Membrane Proteins - genetics
microRNA
MicroRNAs
MicroRNAs - chemistry
MicroRNAs - genetics
Middle Aged
Molecular biology
Morphology
Neoplasm Staging
patients
Proteins
receptors
RNA Interference
RNA, Messenger - chemistry
RNA, Messenger - genetics
title association of the expression of miR-122-5p and its target ADAM10 with human breast cancer
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