title: Assessment of changes in expression and presentation of NKG2D under influence of MICA serum factor in different stages of breast cancer.
abstract: Breast cancer is the most common cancer in women worldwide. In this study, we correlated the serum level of major histocompatibility complex class I-related chain A (sMICA) with expression and presentation of NKG2D receptors on NK cells among patients with breast cancer. Peripheral blood (PB) samples were collected from 49 healthy and 49 breast cancer patients before surgery and chemotherapy. The expression and presentation of NKG2D were assessed using qRT-PCR and flow cytometry, respectively. Furthermore, sMICA levels were determined using ELISA. In flow cytometry, whole blood samples were stained with anti-CD56/NKG2D/CD3 and the obtained results were analyzed using WinMDI software. In addition, SPSS software was used for statistical analysis of data. Significantly higher levels sMICA were detected in the sera of the majority of cancer patients in contrast to healthy volunteers (P < 0.001). The expression and presentation of NKG2D receptor were significantly lower than those in healthy persons, and with an inverse correlation to sMICA and positively correlated with tumor stage. Our study showed that sMICA may have an important role in diminishing the expression and presentation of NKG2D receptor in breast cancer patients and proposes the notion that sMICA can be a target candidate for treatment of breast cancer.
authors.affiliation: Cancer, Petroleum and Environmental Pollutants Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.|Department of Immunology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: R
authors.initials: R
authors.lastname: Roshani
authors.affiliation: Department of Immunology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: M Ghafourian
authors.initials: MG
authors.lastname: Boroujerdnia
authors.affiliation: Cancer, Petroleum and Environmental Pollutants Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.|Department of Surgery, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
authors.forename: A H
authors.initials: AH
authors.lastname: Talaiezadeh
authors.affiliation: Cancer, Petroleum and Environmental Pollutants Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. akhodadadi2@gmail.com.|Department of Immunology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. akhodadadi2@gmail.com.
authors.forename: A
authors.initials: A
authors.lastname: Khodadadi
mesh_terms: D000328:Adult; D000368:Aged; D017951:Antigen Presentation; D001943:Breast Neoplasms / Q000235:genetics* / Q000276:immunology* / Q000473:pathology; D005260:Female; D005434:Flow Cytometry; D015870:Gene Expression; D015395:Histocompatibility Antigens Class I / Q000097:blood / Q000276:immunology*; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology / Q000378:metabolism; D008875:Middle Aged; D055655:NK Cell Lectin-Like Receptor Subfamily K / Q000235:genetics* / Q000276:immunology*; D060787:Neoplasm Grading; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism
chemical_list: D015395:Histocompatibility Antigens Class I; C099187:MHC class I-related chain A; D055655:NK Cell Lectin-Like Receptor Subfamily K; D012333:RNA, Messenger
keywords: Breast cancer; Flow cytometry; NKG2D; qRT-PCR; sMICA