Metastasis, a major challenge during the treatment of lung cancer, causes deterioration in patient health outcomes. Thus, to address this problem, this study aimed to explore the role and contribution of Cholesterol 25-Hydroxylase (CH25H) as a potential diagnostic and prognostic marker in lung cancer. Online public databases were used to analyze the expression level, prognostic value, gene-pathway enrichment, and immune infiltration of CH25H in lung cancer patients. The Real-Time Quantitative Reverse Transcription PCR (qRT-PCR) was used to analyze and detect the CH25H expression levels in leukocytes from lung cancer patients. The expression level of CH25H was significantly reduced in lung adenocarcinoma (LUAD), which is associated with a higher disease stage, but not in lung squamous cell carcinoma (LUSC). Kaplan-Meier survival analysis indicated that LUAD patients with low CH25H expression had a worse prognosis. Mechanistically, our results showed that in LUAD, CH25H may be a regulatory factor affecting the immune cell infiltration level, and the resultant tumor development. Experimental data showed that low expression of CH25H in leukocytes was significantly associated with LUAD metastasis (P<0.01). Our study suggests that CH25H may function as a prognostic and risk stratification biomarker for LUAD.

Objective: To investigate the expression of miRNA-483-5p in esophageal cancer and its correlation with clinicopathological features and prognosis. Methods: This studys 82 cases of esophageal cancer tissue were archived at the study hospital between March 2013 and May 2014. In addition, 28 cases of paracancerous tissue were archived. Real-time fluorescent quantitative polymerase chain reaction was used to detect the relative expression levels of microRNA-483-5p (miRNA-483-5p) in esophageal cancer and adjacent tissues. The relative expression level of miRNA-483-5p was analysed with clinicopathological parameters and prognosis of patients with esophageal cancer. Results: The relative expression of miRNA-483-5p in esophageal cancer was (3.25 +/- 1.25), and the relative expression of miRNA-483-5p in adjacent tissue was (0.99 +/- 0.71). The difference was significant (P<0.05). The expression level of miRNA-483-5p was not related to the esophageal cancer patients gender, age, or histological grade, nor to the depth of invasion of the tissue (P>0.05). It was related to lymph node metastasis and the TNM stage of the esophageal cancer patient (P<0.05). The five-year survival rate of patients with relatively high levels of expression of miRNA-483-5p was 43.90% (18/41), and the five-year survival rate of patients with relatively low levels of expression of miRNA-483-5p was 75.61% (31/41). There was a significant difference (P<0.05). Results from the COX proportional hazard regression model showed that miRNA-483-5p expression level, lymph node metastasis, and TNM stage were independent prognostic factors for patients with esophageal cancer. Conclusions: The expression levels of miRNA-483-5p are elevated in esophageal cancer tissues, and its expression is related to lymph node metastasis and TNM staging in patients with esophageal cancer. MicroRNA-483-5p could be used as an independent risk factor in the prognoses of patients with esophageal cancer, being that it is of great significance in the onset and progression of esophageal cancer; it can be expected to become a new target for clinical treatment of esophageal cancer.

Skin cutaneous melanoma (SKCM) is the most aggressive type of skin cancer, with a high rate of metastasis and mortality; however, identification of biomarkers for the treatment of SKCM is required. Cluster of differentiation (CD)38 has emerged as an effective target for therapeutic drugs in several types of cancer, such as chronic lymphocytic leukemia and multiple myeloma. In the present study, to determine the contribution of CD38 to the diagnosis of SKCM, Gene Expression Profiling Interactive Analysis 2 and University of Alabama Cancer Database online tools were used to analyze The Cancer Genome Atlas-SKCM dataset. Moreover, Search Tool for the Retrieval of Interacting Genes/Proteins and GeneMANIA databases were used to determine protein-protein interaction networks and potential functions. To the best of our knowledge, the results of the present study indicated for the first time that high expression levels of CD38 were a favorable diagnostic factor for SKCM. Moreover, a correlation between CD38 expression levels and the survival probability of patients with SKCM was identified. Integrative analysis predicted that nine genes were correlated with CD38 in SKCM, and the similarity of these genes in SKCM expression and a survival heatmap was verified. Gene ontology enrichment analysis using the Metascape tool revealed that CD38 and its correlated genes were significantly enriched in lymphocyte activation and T cell differentiation regulation. Collectively, the bioinformatics analysis revealed that CD38 might serve as a potential diagnostic predictor for SKCM.