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Xuan Yi,1 Xinxing Wan,1 Md Asaduzzaman Khan,2,3 Xiaoying Sun,1 Zhouqi Wang,1 Ke Chen,1 Lin Peng4 1Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, People’s Republic of China; 2Research Division, Nature Study Society of Bangladesh, Dhaka, 1000, Bangladesh; 3Pulmonary Department, Chobanian & Avedisian School of Medicine, Boston University, Boston, MA, 02118, USA; 4Department of Nephrology, The First Hospital of Changsha, Changsha, People’s Republic of ChinaCorrespondence: Lin Peng, Department of Nephrology, The First Hospital of Changsha, Changsha, People’s Republic of China, Tel +86-731-8466-7510, Email plin1018@163.com Ke Chen, Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, People’s Republic of China, Tel +86-731-8861-8239, Email chenke520@yeah.netPurpose: Adipogenesis is one of the major pathways for generating obesity or overweight that can cause a range of metabolic disorders. Circular RNAs (circRNAs), a specific type of RNAs, have a significant influence on metabolic disorders. This study aims to find differentially expressed circRNAs (DECs) during human subcutaneous adipose tissue (SATs) adipogenesis.Patients and Methods: The human adipose tissue-derived stromal cells (hADSCs) were isolated from human SATs (n = 3), and then induced into adipocytes. Total RNAs were extracted from hADSCs and adipocytes, and he DECs were detected using circRNA microarray. The GO and KEGG pathways of DECs were analyzed by bioinformatic methods, and partial DECs were further validated by quantitative polymerase chain reaction (qPCR).Results: Our study detected a total of 1987 DECs, among which, 1134 were found upregulated and 853 were downregulated. GO analysis showed that the upregulated DECs have catalytic activity in intracellular organelle and cytoplasms, whereas downregulated DECs are enriched in organelle lumen, and are involved in positive regulation of developmental proc

Xiaoying Sun,1 Xinxing Wan,1 Md Asaduzzaman Khan,2 Keke Zhang,1 Xuan Yi,1 Zhouqi Wang,1 Ke Chen1 1Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, People’s Republic of China; 2The Research Centre for Preclinical Medicine, Southwest Medical University, Luzhou, People’s Republic of ChinaCorrespondence: Ke Chen, Department of Endocrinology, The Third Xiangya Hospital of Central South University, Changsha, People’s Republic of China, Tel +86-731-8861-8239, Email chenke520@yeah.netPurpose: Brown adipose tissue (BAT) can rapidly generate heat and improve energy metabolism. Circular RNAs (circRNAs) are cellular endogenous non-coding RNAs, which can regulate the development and progress of different diseases. However, the role of circRNAs in human BAT is not fully understood. Here, we analyzed the differentially expressed circRNAs (DECs) in human BAT, as well as in white adipose tissue (WAT), and identified new biomarkers of BAT.Patients and Methods: Three human BAT and three human subcutaneous WAT samples were selected, and circRNA microarray was performed. Additionally, quantitative real-time polymerase chain reaction (qRT-PCR) was applied to determine the expression of six circRNAs. Finally, the functional analysis was performed by bioinformatics.Results: Compared to WAT, 152 upregulated circRNAs and 201 downregulated circRNAs were identified in BAT. The DECs were further subjected to GO and KEGG enrichment analysis. Several circRNAs, for example, hsa_circ_0006168, hsa_circ_26337 and hsa_circ_0007507 were found upregulated and hsa_circ_0030162 was found downregulated in human BAT compared to WAT.Conclusion: This study profiles the circRNA expression in human BAT and WAT, and suggests hsa_circ_0006168, hsa_circ_26337, hsa_circ_0007507, and hsa_circ_0030162 as novel biomarkers for human BAT.Keywords: brown adipose tissue, biomarkers, circRNA microarray

Keke Zhang,1 Xinxing Wan,1 Md Asaduzzaman Khan,2 Xiaoying Sun,1 Xuan Yi,1 Zhouqi Wang,1 Ke Chen,1 Lin Peng3 1Department of Endocrinology, the Third Xiangya Hospital of Central South University, Changsha, People’s Republic of China; 2The Research Centre for Preclinical Medicine, Southwest Medical University, Luzhou, People’s Republic of China; 3Department of Nephrology, the First Hospital of Changsha, Changsha, People’s Republic of ChinaCorrespondence: Lin Peng, Department of Nephrology, the First Hospital of Changsha, Changsha, People’s Republic of China, Tel +86-731-8466-7510, Email plin1018@163.com Ke Chen, Department of Endocrinology, the Third Xiangya Hospital of Central South University, Changsha, People’s Republic of China, Tel +86-731-8861-8239, Email chenke520@yeah.netPurpose: Type 2 diabetes mellitus (T2DM) increases the incidence of diabetic nephropathy (DN) and eventually progresses to end-stage renal disease. Circular RNAs (circRNAs) are a class of non-coding RNAs that are promising as diagnostic biomarkers and therapeutic targets for human diseases. The aim of this study was to analyze the differential expression of circRNAs (DECs) in peripheral blood from patients with early type 2 diabetic nephropathy (ET2DN), T2DM and controls, which will facilitate to discover some new biomarkers for ET2DN.Patients and Methods: Twenty ET2DN patients, 20 T2DM patients, and 20 normal controls were included in this study. Blood samples from 3 random subjects of age- and sex-matched patients in each group, respectively, were used to detect circRNA expression profiles by circRNA microarray, and the circRNA expression of remaining subjects was validated by real-time quantitative polymerase chain reaction (qRT-PCR). Further functional assessment was performed by bioinformatic tools.Results: There were 586 DECs in ET2DN vs T2DM group (249 circRNAs were upregulated and 337 circRNAs were downregulated); 176 circRNAs were upregulated and 101 circRNAs were downregulat