ESMO Asia Virtual Congress 2020

Abstract 431P

Background

Glioma is one of the most common types of tumor of the central nervous system with high morbidity and mortality. Based on this fact that the prognosis of patients with high- grade glioma is poor, it is very important to develop new diagnostic and therapeutic strategies covering more efficient methods and drugs. Recent studies have demonstrated that Long non-coding RNAs (lncRNAs) may act as potential inducers or suppressors of numerous types of tumors including glioma. Besides, there are more expression of lncRNAs than coding mRNAs and miRNAs in specific tissues.In this study we evaluated two lncRNAs including MEG3 and MDC1-AS1 which seemed to be involved in the initiation and progression of high grade Gliomas.

Methods

The expression of lncRNAs were studied on 150 paraffin tissue block samples of Iranian participants, including 37 samples of low-grade gliomas(I&II), 58 samples of high grade glioma (III& IV) and 95 samples of non-tumoral tissues. After RNA extraction and complementary DNA synthesis(cDNA), probe-based (Taqman) Real-time PCR were used to evaluate lncRNAs expression level followed by statistical analizing.

Results

Our analysis, indicates that lncRNAs including MEG3 and MDC-AS1 are down-regulated (p =0.001) in high grade glioma tumors (grade III & IV) in comparison to low grade gliomas (grade I and II) and non-tumoral tissues.

Conclusions

The results show that there are critical expression differences i n MEG3 and MDC1-AS1 lncRNAs as tumor suppressor genes between high and low-grade gliomas. Comprising with other reports, it could be assumed that expression of MEG3 and MDC1-AS1 lncRNAs may serve as potential biomarkers and also therapeutic targets for detection and treatment of glioma tumors. Key words: Quantitative, lncRNAs, glioma.