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Iranian Journal of Allergy, Asthma and Immunology، جلد ۱۸، شماره ۵، صفحات ۴۹۰-۴۹۷
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عنوان انگلیسی SDF-1α Reduces Human Natural Killer Cell Cytotoxicity against Chronic Myelogenous Leukemia K562 Cells
چکیده انگلیسی مقاله Stromal cell-derived factor-1 alpha (SDF-1α) has been shown to be up-regulated in a variety of malignancies. So that, its expression is associated with poor prognosis and invasiveness. Natural killer (NK) cells are important effector cells against virus-infected and transformed cells. Especially they play a key role in tumor immune surveillance. Whereas it was not well understood whether SDF-1α modulates anti-tumor immune response or not, the purpose of the present study was to investigate the effect of SDF-1α on the cytotoxic properties of peripheral blood NK cells. Human peripheral blood NK cells were freshly isolated using MACSxpess system and cultured in the presence or absence of recombinant human SDF-1α or SDF-1α plus CXCR4 antagonist, AMD3100. CD107a degranulation assay was conducted through the co-culture of NK cells with K562 cells. The percentage of CD107a positive cells was assessed by flowcytometry. Effect of SDF-1α was also examined on the mRNA levels of NKG2A and NKG2D as indicator examples of NK cell inhibitory and activating receptors, respectively. SDF-1α significantly decreased the degranulation activity of NK cells (p=0.04). The mRNA content of NKG2D was down-regulated under the influence of SDF-1α (p=0.03). Moreover, AMD3100 exhibited a trend in recovering the NKG2D mRNA level to its un-treated state (p=0.05).  The present study reveals that SDF-1α has a negative impact on NK cell activity and might is involved in tumor immune-suppression. Thus, it can be concluded that microenvironment manipulations targeting SDF-1α may reinforce current cancer therapies by disturbing one of the immune-suppressive axes in the cancerous milieu. 
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نویسندگان مقاله | Alireza Mardomi
Immunogenetics Research Center, Mazandaran University of Medical Sciences, Sari, Iran AND Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran


| Hadi Hossein-Nataj
Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran


| Narjes Jafari
Immunogenetics Research Center, Mazandaran University of Medical Sciences, Sari, Iran


| Nabiallah Mohammadi
Immunogenetics Research Center, Mazandaran University of Medical Sciences, Sari, Iran AND Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran AND Student Research Committee, Mazandaran University of Medical Sciences, Sari, Iran


| Saeid Abediankenari
Immunogenetics Research Center, Mazandaran University of Medical Sciences, Sari, Iran AND Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
نشانی اینترنتی http://ijaai.tums.ac.ir/index.php/ijaai/article/view/2265
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/89/article-89-2007437.pdf
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