title: Long Noncoding RNAs as Novel Biomarkers Have a Promising Future in Cancer Diagnostics.
abstract: Cancers have a high mortality rate due to lack of suitable specific early diagnosis tumor biomarkers. Emerging evidence is accumulating that lncRNAs (long noncoding RNAs) are involved in tumorigenesis, tumor cells proliferation, invasion, migration, apoptosis, and angiogenesis. Furthermore, extracellular lncRNAs can circulate in body fluids; they can be detected and strongly resist RNases. Many researchers have found that lncRNAs could be good candidates for tumor biomarkers and possessed high specificity, high sensitivity, and noninvasive characteristics. In this review, we summarize the detection methods and possible sources of circulating lncRNAs and outline the biological functions and expression level of the most significant lncRNAs in tissues, cell lines, and body fluids (whole blood, plasma, urine, gastric juice, and saliva) of different kinds of tumors. We evaluate the diagnostic performance of lncRNAs as tumor biomarkers. However, the biological functions and the mechanisms of circulating lncRNAs secretion have not been fully understood. The uniform normalization protocol of sample collection, lncRNAs extraction, endogenous control selection, quality assessment, and quantitative data analysis has not been established. Therefore, we put forward some recommendations that might be investigated in the future if we want to adopt lncRNAs in clinical practice.
authors.affiliation: Faculty of Laboratory Medicine, Xiangya Medical College, Central South University, Changsha, Hunan 41001, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Shi
authors.affiliation: Faculty of Laboratory Medicine, Xiangya Medical College, Central South University, Changsha, Hunan 41001, China.
authors.forename: Ge
authors.initials: G
authors.lastname: Gao
authors.affiliation: Faculty of Laboratory Medicine, Xiangya Medical College, Central South University, Changsha, Hunan 41001, China.
authors.forename: Yingli
authors.initials: Y
authors.lastname: Cao
mesh_terms: D014408:Biomarkers, Tumor / Q000097:blood / Q000235:genetics* / Q000652:urine; D055088:Early Detection of Cancer; D005750:Gastric Juice / Q000737:chemistry; D015972:Gene Expression Regulation, Neoplastic; D020022:Genetic Predisposition to Disease; D006801:Humans; D025202:Molecular Diagnostic Techniques / Q000592:standards; D009369:Neoplasms / Q000175:diagnosis* / Q000235:genetics*; D017410:Practice Guidelines as Topic; D062085:RNA, Long Noncoding / Q000097:blood / Q000235:genetics* / Q000652:urine; D012463:Saliva / Q000737:chemistry
chemical_list: D014408:Biomarkers, Tumor; D062085:RNA, Long Noncoding