BackgroundThe 2019-nCoV epidemic is the public health emergency MESHD that has had the greatest impact on the world. Our study aimed to better understand the underlying mechanisms and function of angiotensin-converting enzyme 2 (ACE2) receptor of 2019-nCoV on lung adenocarcinoma MESHD lung adenocarcinoma HP patients (LUAD), and provide a theoretical basis for early diagnosis, prognosis and targeted therapy of 2019-nCoV. MethodsThis study focuses on the expression level, functions, mutation rate, and copy number variations (CNVs) of ACE2 in LUAD using an extensive bioinformatics data mining process. The interaction between ACE2 expression and clinical-pathological parameters of patients with LUAD was investigated using UALCAN. Also, the essential biological features, single nucleotide variations (SNVs), CNVs, and pathway activities of genes interacting with ACE2 in these cancers were further analyzed. ResultsWe found that ACE2 expression in LUAD patients increased with age TRANS, but it was not related to cancer status, patient’s race, patient’s gender TRANS, or patient’s smoking habits. Moreover, our results showed that compared to that in normal tissues, ACE2 was highly expressed in colon adenocarcinoma HP adenocarcinoma MESHD (COAD), kidney renal papillary cell carcinoma HP carcinoma MESHD (KIRP), pancreatic adenocarcinoma HP adenocarcinoma MESHD (PAAD), rectum adenocarcinoma MESHD (READ), and stomach adenocarcinoma MESHD (STAD). However, there is no significant difference in the expression of ACE2 in patients of different ages TRANS. ConclusionsThese findings demonstrate the importance of ACE2 in LUAD, and provide insights into the regulatory mechanisms and function of ACE2.