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PD-L1 Expression in Human Breast Cancer Stem Cells Is Epigenetically Regulated through Posttranslational Histone Modifications
المؤلفون المشاركون
Elkord, Eyad
Darvin, Pramod
Sasidharan Nair, Varun
المصدر
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-9، 9ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-02-21
دولة النشر
مصر
عدد الصفحات
9
التخصصات الرئيسية
الملخص EN
Tumor progression through immune evasion is a major challenge in cancer therapy.
Recent studies revealed that enhanced PD-L1 expression in cancer stem cells is linked to immune evasion.
Understanding the mechanisms behind this PD-L1 overexpression in cancer stem cells is critical for developing more effective strategies for preventing immune evasion and increasing the efficacy of anti-PD-1/PD-L1 therapy.
Tumorsphere formation in breast cancer cells enhanced epithelial to mesenchymal transition (EMT), which is evident by increased expression of mesenchymal markers.
In this study, we analyzed CpG methylation of PD-L1 promoter in MCF-7 and BT-549 breast cancer cells and tumorspheres derived from them.
PD-L1 promoter was significantly hypomethylated in MCF-7 tumorspheres, but not from BT-549 tumorspheres, compared with their cell line counterparts.
The active demethylation of PD-L1 promoter was confirmed by the increase in the distribution of 5hmC and decrease in 5mC levels and the upregulation of TET3 and downregulation of DNMTs enzymes in MCF-7 tumorspheres, compared with the cell line.
Additionally, we checked the distribution of repressive histones H3K9me3, H3K27me3, and active histone H3K4me3 in the PD-L1 promoter.
We found that distribution of repressive histones to the PD-L1 promoter was lower in tumorspheres, compared with cell lines.
Moreover, an overexpression of histone acetylation enzymes was observed in tumorspheres suggesting the active involvement of histone modifications in EMT-induced PD-L1 expression.
In summary, EMT-associated overexpression of PD-L1 was partially independent of promoter CpG methylation and more likely to be dependent on posttranslational histone modifications.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Darvin, Pramod& Sasidharan Nair, Varun& Elkord, Eyad. 2019. PD-L1 Expression in Human Breast Cancer Stem Cells Is Epigenetically Regulated through Posttranslational Histone Modifications. Journal of Oncology،Vol. 2019, no. 2019, pp.1-9.
https://search.emarefa.net/detail/BIM-1184170
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Darvin, Pramod…[et al.]. PD-L1 Expression in Human Breast Cancer Stem Cells Is Epigenetically Regulated through Posttranslational Histone Modifications. Journal of Oncology No. 2019 (2019), pp.1-9.
https://search.emarefa.net/detail/BIM-1184170
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Darvin, Pramod& Sasidharan Nair, Varun& Elkord, Eyad. PD-L1 Expression in Human Breast Cancer Stem Cells Is Epigenetically Regulated through Posttranslational Histone Modifications. Journal of Oncology. 2019. Vol. 2019, no. 2019, pp.1-9.
https://search.emarefa.net/detail/BIM-1184170
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1184170
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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