Patrick tan, DJ

A team of researchers from the Agency for Science, Technology, and Research and the National University of Singapore created software that accurately predicts chemical alterations of RNA molecules based on genomic data.Their method, called m6Anet, was published in Nature Methods.Within the RNA, different types of chemical molecules added to the RNA determine how the RNA molecule functions. However, these RNA changes are often invisible to standard approaches used by scientists to read RNA. Presently, more than 160 RNA modifications have been discovered, of which the most prevalent RNA modification--N6-Methyladenosine (m6A)--is associated with human diseases such as cancer.In the past, identifying RNA modifications required time-consuming and laborious bench experiments that were not accessible to most laboratories. Furthermore, previous methods failed to detect m6A at the single-molecule resolution, which is critical for understanding the biological mechanisms involving m6A.The team overcame these limitations by leveraging direct Nanopore RNA sequencing, an emerging technology that sequences a raw RNA molecule together with its RNA modifications. In this study, they developed m6Anet, a software that trains deep neural networks with abundant direct Nanopore RNA sequencing data and Multiple-Instance Learning (MIL) approach, to accurately detect the presence of m6A."In traditional machine learning, we often have one label for each example we want to classify. For example, each image is either a cat or not a cat, and the algorithm learns to differentiate cat images from other images based on their labels. The issue with detecting m6A is that we have an overwhelming amount of data with unclear labels. Imagine having a large photo album with a cat photo hidden among millions of other photos, and attempting to identify that particular photo without having any labels to base your search upon. Fortunately, this has been studied in machine learning literature before and is known as the MIL problem," explained Christopher Hendra, current PhD student at A*STAR's Genome Institute of Singapore (GIS) and NUS Institute of Data Science, and the first author of the study.In this study, the team demonstrated that m6Anet can predict the presence of m6A with high accuracy at a single-molecule resolution from a single sample across species."Our AI model has only seen data from a human sample, but it is able to accurately identify RNA modifications even in samples from species that the model has not seen before," said Dr Jonathan Goke, Group Leader of the Laboratory of Computational Transcriptomics at A*STAR's GIS and senior author of the study. "The ability to identify RNA modifications in different biological samples can be used to understand their role in many different applications such as in cancer research or plant genomics.""It is very satisfying to see how theoretically-grounded and well-studied machine-learning techniques such as the MIL can be leveraged to offer an elegant solution to this challenging problem. Witnessing the software being adopted so rapidly by the scientific community is a reward for our efforts!" said Associate Professor Alexandre Thiery, Department of Statistics and Data Science, NUS Faculty of Science, who co-led the study.Prof Patrick Tan, Executive Director of A*STAR's GIS, said, "Accurately and efficiently identifying RNA modifications had been a long-standing challenge, and m6Anet helps to address these limitations. To benefit the wider scientific community, this AI method, along with results from the study, have been made public for other scientists to accelerate their research."( With inputs from ANI )Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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