title: DRME: Count-based differential RNA methylation analysis at small sample size scenario.
abstract: Differential methylation, which concerns difference in the degree of epigenetic regulation via methylation between two conditions, has been formulated as a beta or beta-binomial distribution to address the within-group biological variability in sequencing data. However, a beta or beta-binomial model is usually difficult to infer at small sample size scenario with discrete reads count in sequencing data. On the other hand, as an emerging research field, RNA methylation has drawn more and more attention recently, and the differential analysis of RNA methylation is significantly different from that of DNA methylation due to the impact of transcriptional regulation. We developed DRME to better address the differential RNA methylation problem. The proposed model can effectively describe within-group biological variability at small sample size scenario and handles the impact of transcriptional regulation on RNA methylation. We tested the newly developed DRME algorithm on simulated and 4 MeRIP-Seq case-control studies and compared it with Fisher's exact test. It is in principle widely applicable to several other RNA-related data types as well, including RNA Bisulfite sequencing and PAR-CLIP. The code together with an MeRIP-Seq dataset is available online (https://github.com/lzcyzm/DRME) for evaluation and reproduction of the figures shown in this article.
authors: Key Laboratory of Information Fusion Technology of Ministry of Education, School of Automation, Northwestern Polytechnical University, Xi'an 710072, China.
authors: Lian
authors: L
authors: Liu
authors: Key Laboratory of Information Fusion Technology of Ministry of Education, School of Automation, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: zhangsw@nwpu.edu.cn.
authors: Shao-Wu
authors: SW
authors: Zhang
authors: Picower Institute for Learning and Memory, Department of Brain and Cognitive Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors: Fan
authors: F
authors: Gao
authors: Suzhou Urban and Environmental Research Institute, Huai'an Research Institute of New-type Urbanization, Department of Environmental Sciences, Xi'an Jiaotong-Liverpool University, Suzhou 215123, China.
authors: Yixin
authors: Y
authors: Zhang
authors: Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, TX 78230, USA.
authors: Yufei
authors: Y
authors: Huang
authors: Key Laboratory of Information Fusion Technology of Ministry of Education, School of Automation, Northwestern Polytechnical University, Xi'an 710072, China; Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.
authors: Runsheng
authors: R
authors: Chen
authors: Department of Biological Sciences, Xi'an Jiaotong-Liverpool University, Suzhou 215123, China. Electronic address: jia.meng@xjtlu.edu.cn.
authors: Jia
authors: J
authors: Meng
mesh_terms: D000465:Algorithms; D008745:Methylation; D010316:Particle Size; D012313:RNA / Q000032:analysis* / Q000737:chemistry* / Q000235:genetics
chemical_list: D012313:RNA
keywords: Differential methylation; MeRIP-Seq; N(6)-Methyladenosine (m(6)A); Negative binomial distribution; R/Bioconductor package; RNA methylation