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• W3036665940 abstract "Dear Editor, Hepatoblastoma (HB), the most common type primary malignant embryonal hepatic tumor, is usually diagnosed in pediatric patients during the first 3 years of life, which accounts for 60-85% of all hepatic tumors in children.1 The annual incidence of HB is 1.5 cases/million population per year.2 Over the last 30 years, the number has increased by as much as 2.7% per year. HB etiology remains unknown until now, and most cases are sporadic but, it is probably due to genetic abnormalities and/or deregulation of embryonic pathways such as the Wnt,3, 4 Insulin-like growth factor,5 or Myc6, 7 signaling pathway through inhibition of their regulatory components via posttranscriptional modification during the embryonic development. Both DNA and histone proteins could undergo dynamic and reversible chemical modifications to shape cell fate.8 To date, more than a hundred kinds of distinct modifications have been observed in eukaryotic RNAs9; however, the enzymes involved and the biological functions of these modified RNAs are generally uncharted. Modifications to RNAs were once considered to only occur on cap and tail, but a flurry of recent researches identified the internal modifications of RNAs that could play pivotal roles in diverse physiological processes. Posttranslational modifications (PTMs) are defined as chemical and covalent modifications of the protein residues. It transpires soon after the translation process or at any stage of the life cycle of a given protein. Different PTMs could regulate protein folding, stability, cellular localization, activity, and interactions with other proteins or biomolecular species,10 which results in their crucial role in diverse biological processes. In the recent years, data available on posttranscriptional modifications or PTMs have increased drastically owing to the improvement in antibody-based immunoprecipitation followed by high-throughput sequencing and mass spectrometry-based detection method for prediction and identifying the modification site, respectively. Several databases, software, and bioinformatics tools have been developed to support the analysis of PTMs data and to enhance our understanding on PTMs types, status, and related diseases. Until now, plentiful databases regarding PTMs in mRNAs and proteins have been developed, whereas systematic collections of validated PTMs of proteins and mRNAs in hepatocytes are few and far between. Here, we give a detailed introduction of transcription, translation, posttranscriptional modifications (N6-methyladenosine, m6A), and PTMs (O-GlcNAcylation and phosphorylation) in RNAs and proteins in hepatic cells of HB patients, including the web interface and its application. Our database, HBprem(http://www.hbpremdb.com), contains detailed information of PTMs in RNAs and proteins using the systematic bioinformatics approaches, providing resource or references for functional annotation of PTMs (Methods in the Supporting Information). HBprem will be a unique database for understanding and identifying PTMs occurring in mRNAs and proteins of HB patients. HBprem currently contains quantitative sequence data of mRNAs, m6A methylated mRNAs, proteins, phosphorylated proteins, and O-GlcNAcylated proteins of matched HB tissues and adjacent normal tissues acquired from Shanghai Children's Medical Center (Shanghai, China). The numbers of these molecules are summarized in Table S1. A user-friendly web interface was developed to facilitate users accessing to the mRNAs and proteins expression, m6A mRNA methylation, and PTMs like phosphorylation and O-GlcNAcylation in proteins from HB patients. HBprem database has a conventional data retrieval system. As showed in Figure 1A, in HBprem database, we provided the platform for searching and browsing all the data. Each section comprehends the copious information to ensure convenient use without any prerequisite experience. In “Browse,” users can retrieve the mRNAs, proteins, and PTMs occurring in HB patients (Figure 1B). For example, clicking the “mRNA” option of the “Browse” page will direct users to the option page of mRNAs. Users can find basic annotations in the browser page such as gene, gene ID, methods of detection, tumor versus normal value, validity value (P-value), and so forth. The detailed information can be assessed by entering the “Detail” option. Users could further search the data by different options like “Gene ID,” “Gene,” and “Ensemble ID.” Users can also search a specific mRNA or protein by official gene name using “Search” option. For instance, when you enter the gene name “A1BG,” the search result page will be displayed with the basic information. Clicking the “+” option, detailed information about A1BG will be loaded. All the detailed information about the mRNAs, m6A methylated mRNAs, proteins, phosphorylated proteins, and O-GlcNAcylated proteins in HB tissues and adjacent normal liver tissues could be downloaded by clicking “Download” option. As HB is a rare disease around the world, the information about mRNAs, m6A methylated mRNAs, proteins, phosphorylated proteins, and O-GlcNAcylated proteins from HB may not be comprehensive. Therefore, we developed a “Submission” option to invite other researchers to upload new findings regarding transcription, translation, or PTMs of HB tissues or cells. To date, substantial studies have documented that aberrant PTMs of RNAs and proteins are involved in the progression of various types of diseases or tumors. Herein, we developed HBprem database that provides a comprehensive list of differentially expressed genes in transcriptional or translational level and PTMs of paired HB tissues and adjacent normal liver tissues. HBprem database can also provide specific information about distinct protein and mRNA in HB patients. We believe that HBprem database can become a powerful tool to assess PTMs in HB. In future, we will continually maintain and update the database to react to the accelerated growth of scientific researches of PTMs in mRNAs and proteins in hepatic tissues. In addition, we will frequently enhance the database servers and integrate more clinical samples and data sources to make HBprem database more advanced and resourceful. And we greatly appreciate for submitting your data to HBprem. This study was financially supported by the National Natural Science Foundation of China (81871727), Municipal Human Resources Development Program for Outstanding Leaders in Medical Disciplines in Shanghai (2017BR036), Program of Shanghai Academic/Technology Research Leader (18XD1402600), Shanghai Municipal Education Commission-Gaofeng Clinical Medicine Grant Support (20171926), Science and Technology Development Fund of Pudong New Area of Shanghai (PKJ2017-Y03), and Joint Research Project of Pudong New Area Health Commission of Shanghai (PW2019D-10). The authors declare no conflict of interest. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article." @default.
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• W3036665940 date "2020-06-01" @default.
• W3036665940 modified "2023-09-26" @default.
• W3036665940 title "HBprem: A database of transcription, translation, and posttranscriptional and posttranslational modifications in hepatoblastoma" @default.
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