scholarly journals Long Non-Coding RNA HOXA Transcript Antisense RNA Myeloid-Specific 1–HOXA1 Axis Downregulates the Immunosuppressive Activity of Myeloid-Derived Suppressor Cells in Lung Cancer

2018 ◽  
Vol 9 ◽  
Author(s):  
Xinyu Tian ◽  
Jie Ma ◽  
Ting Wang ◽  
Jie Tian ◽  
Yue Zhang ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Antisense Rna ◽  
Suppressor Cells ◽  
Myeloid Derived Suppressor Cells ◽  
Immunosuppressive Activity ◽  
Non Coding Rna ◽  
Long Non Coding Rna

scholarly journals KDM6A Lysine Demethylase Directs Epigenetic Polarity of MDSCs during Murine Sepsis

2021 ◽  
pp. 1-12
Author(s):  
Isatou Bah ◽  
Tuqa Alkhateeb ◽  
Dima Youssef ◽  
Zhi Q. Yao ◽  
Charles E. McCall ◽  
...  
Keyword(s):  
Suppressor Cells ◽  
Transcription Activation ◽  
Myeloid Derived Suppressor Cells ◽  
Molecular Processes ◽  
Epigenetic Switch ◽  
Translation Research ◽  
Non Coding Rna ◽  
Genetic Deletion ◽  
Lysine Demethylase ◽  
Long Non Coding Rna

Sepsis-induced myeloid-derived suppressor cells (MDSCs) increase mortality risk. We previously identified that long non-coding RNA Hotairm1 supports myeloid precursor shifts to Gr1<sup>+</sup>CD11b<sup>+</sup> MDSCs during mouse sepsis. A major unanswered question is what molecular processes control Hotairm1 expression. In this study, we found by a genetic deletion that a specific PU.1-binding site is indispensable in controlling Hotairm1 transcription. We then identified H3K4me3 and H3K27me3 at the PU.1 site on the Hotairm1 promoter. Controlling an epigenetic switch of Hotairm1 transcription by PU.1 was histone KDM6A demethylase for H3K27me3 that derepressed its transcription with possible contributions from Ezh2 methyltransferase for H3K27me3. KDM6A knockdown in MDSCs increased H3K27me3, decreased H3K4me3, and inhibited Hotairm1 transcription activation by PU.1. These results enlighten clinical translation research of PU.1 epigenetic regulation as a potential sepsis immune-checkpoint treatment site.

scholarly journals M2 macrophage-derived exosomal long non-coding RNA AGAP2-AS1 enhances radiotherapy immunity in lung cancer by reducing microRNA-296 and elevating NOTCH2

2021 ◽  
Vol 12 (5) ◽  
Author(s):  
Fuquan Zhang ◽  
Yonghua Sang ◽  
Donglai Chen ◽  
Xuejie Wu ◽  
Xiaofan Wang ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Cancer Cells ◽  
Antisense Rna ◽  
Lung Cancer Cells ◽  
M2 Macrophage ◽  
Non Coding Rna ◽  
Predictive Role ◽  
Long Non Coding Rna ◽  
Different Doses

AbstractLong noncoding RNAs (lncRNAs) and microRNAs (miRNAs) play vital roles in human diseases. We aimed to identify the effect of the lncRNA AGAP2 antisense RNA 1 (AGAP2-AS1)/miR-296/notch homolog protein 2 (NOTCH2) axis on the progression and radioresistance of lung cancer. Expression of AGAP2-AS1, miR-296, and NOTCH2 in lung cancer cells and tissues from radiosensitive and radioresistant patients was determined, and the predictive role of AGAP2-AS1 in the prognosis of patients was identified. THP-1 cells were induced and exosomes were extracted, and the lung cancer cells were respectively treated with silenced AGAP2-AS1, exosomes, and exosomes upregulating AGAP2-AS1 or downregulating miR-296. The cells were radiated under different doses, and the biological processes of cells were assessed. Moreover, the natural killing cell-mediated cytotoxicity on lung cancer cells was determined. The relationships between AGAP2-AS1 and miR-296, and between miR-296 and NOTCH2 were verified. AGAP2-AS1 and NOTCH2 increased while miR-296 decreased in radioresistant patients and lung cancer cells. The malignant behaviors of radioresistant cells were promoted compared with the parent cells. Inhibited AGAP2-AS1, macrophage-derived exosomes, and exosomes overexpressing AGAP2-AS1 or inhibiting miR-296 facilitated the malignant phenotypes of radioresistant lung cancer cells. Furthermore, AGAP2-AS1 negatively regulated miR-296, and NOTCH2 was targeted by miR-296. M2 macrophage-derived exosomal AGAP2-AS1 enhances radiotherapy immunity in lung cancer by reducing miR-296 and elevating NOTCH2. This study may be helpful for the investigation of radiotherapy of lung cancer.

scholarly journals Long Non-coding RNA FEZF1-AS1 Promotes Growth and Reduces Apoptosis Through Regulation of miR-363-3p/PAX6 Axis in Retinoblastoma

2021 ◽  
Author(s):  
Xiuming Liu ◽  
Xiaofeng Li ◽  
Jianchang Li
Keyword(s):  
Cell Viability ◽  
Antisense Rna ◽  
Tumor Formation ◽  
Retinoblastoma Cell ◽  
Non Coding Rna ◽  
High Incidence ◽  
Non Coding Rnas ◽  
Long Non Coding Rna ◽  
Common Malignancy

AbstractRetinoblastoma is the most common malignancy in children's eyes with high incidence. Long non-coding RNAs (lncRNAs) play important roles in the progression of retinoblastoma. LncRNA FEZF1 antisense RNA 1 (FEZF1-AS1) has been found to stimulate retinoblastoma. However, the mechanism of FEZF1-AS1 underlying progression of retinoblastoma is still unclear. In current study, FEZF1-AS1 was up-regulated in retinoblastoma tissues and cells. FEZF1-AS1 overexpression enhanced retinoblastoma cell viability, promoted cell cycle, and inhibited apoptosis. Conversely, FEZF1-AS1 knockdown reduced cell viability, cycle, and elevated apoptosis. The interaction between FEZF1-AS1 and microRNA-363-3p (miR-363-3p) was confirmed. FEZF1-AS1 down-regulated miR-363-3p and up-regulated PAX6. PAX6 was a target gene of miR-363-3p. EZF1-AS1 promoted retinoblastoma cell viability and suppressed apoptosis via PAX6. Further, we demonstrated that FEZF1-AS1 contribute to tumor formation in vivo. In conclusion, FEZF1-AS1 elevated growth and inhibited apoptosis by regulating miR-363-3p/PAX6 in retinoblastoma, which provide a new target for retinoblastoma treatment.

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