ALOX15, a new potential functional target of lung adenocarcinoma

PurposeThe purpose of this study is to explore whether the down-regulation of ALOX15 is related to the stage, differentiation and prognosis of lung adenocarcinoma, whether the overexpression of ALOX15 can inhibit tumor proliferation and metastasis, and whether it is related to the functional target of lung adenocarcinoma(LUAD). MethodsFirstly, bioinformatics of lung cancer patients was analyzed using the TCGA database to study the differential expression of ALOX15 in LUAD and its effect on the survival of LUAD. Then, 50 clinical tissue samples of LUAD were collected to detect the expression of ALOX15 and its relationship with the differentiation degree and stage of lung cancer. Finally, the relationship between the expression of ALOX15 and the proliferation and differentiation of LUAD cell lines (NCI-H1944, A549, PC9) with different degrees of differentiation and the construction of ALOX15 overexpression stable lines was detected. ResultsALOX15 bioinformatics analysis showed that ALOX15 decreased significantly in the early stage of LUAD and had no correlation with the survival of lung cancer patients. ALOX15 was downregulated in LUAD with low differentiation and metastasis in LUAD. LUAD cell lines showed that the lower the degree of differentiation, the lower the expression of ALOX15, and the overexpression of ALOX15 in LUAD cells inhibited the proliferation and migration of cancer cells. ConclusionThese results suggest that the expression of ALOX15 is closely related to the differentiation, proliferation, and metastasis of LUAD, and that upregulation of ALOX15 may inhibit the development of LUAD, suggesting that ALOX15 is a potential biological therapeutic target. Author summaryO_ST_ABSWhy was this study done?C_ST_ABSO_LILung cancer is one of the most frequently diagnosed cancers in the world and the leading cause of cancer-related deaths worldwide. C_LIO_LILung cancer is a heterogeneous disease with a wide range of clinicopathologic features. Lung cancer is roughly divided into non-small cell lung cancer (85% of all diagnoses) and small cell lung cancer (15% of all diagnoses). Adenocarcinoma is a common subtype of non-small cell lung cancer, and its recurrence rate is high, and the prognosis is poor. Therefore, the pathogenesis and characteristics of adenocarcinoma are studied and explored. C_LI What did the researchers do and find?O_LIBiological information database was used to analyze the expression level of arachidonic acid-15-lipoxygenase (ALOX15) in lung adenocarcinoma, and then the expression differences were discussed through clinical samples and cell experiments. C_LIO_LILow ALOX15 expression was detected in lung adenocarcinoma (LAUD) patients compared with normal tissues, and ALOX15 levels influenced LUAD development. C_LIO_LIBy infecting A549 with lentivirus and overexpressing ALOX15 of A549 and PC-9 with PC9, it was found that ALOX15 inhibited the proliferation of tumor cells C_LI What do these findings mean?O_LIarachidonic acid-15-lipoxygenase may be one novel potential biomarker for LUAD and a potential therapeutic target C_LI