Overexpression of lncRNA DLEU1 in Gastric Cancer Tissues Compared to Adjacent Non-Tumor Tissues

Purpose Gastric cancer (GC) is caused by environmental factors and genetic changes of protein-coding- and non-coding sequences, which entail short non-coding RNAs (microRNAs) and long non-coding RNAs (lncRNAs). DLEU1 (deleted in lymphocytic leukemia 1), as an effective lncRNA located on chromosome 14.3q 13, modulates the nuclear factor-kB (NF-kB) signaling pathway. This gene usually plays an oncogenic role in the tumorigenesis of multiple types of cancer. The present study examined the expression level of DLEU1 and its association with clinical-pathological characteristics in GC. Methods Total RNA of 100 specimens was extracted by TRIzol reagent. After cDNA synthesis, qRT-PCR analysis was performed to measure the expression level of the DLEU1 gene and the obtained data were analyzed by SPSS 16.0. Results The relative expression level of DLEU1 significantly increased in tumor specimens compared to the normal tumor margin specimens. The biomarker index of lncRNA DLEU1 was 0.7 in tumor tissues. The observed high expression level of DLEU1 was pertinent to the pathological progressive TNM stage, lymph node metastasis, differentiation degree, patient's age and lifestyle, and Helicobacter pylori infection in GC patients. Conclusion The obtained findings suggested that DLEU1 acts as an oncogene in GC and might be a new target for gene therapy of GC.

Automated summary

The study found that the expression of DLEU1 significantly increased in gastric cancer and was associated with tumor progression, lymph node metastasis, patient age, lifestyle, and Helicobacter pylori infection. The results suggest that DLEU1 may be a new target for gene therapy in gastric cancer.