A comparison of next-generation sequencing analysis methods for cancer xenograft samples |
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Authors: | Wentao Dai Jixiang Liu Quanxue Li Wei Liu Yi-Xue Li Yuan-Yuan Li |
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Affiliation: | 1. Shanghai Center for Bioinformation Technology, Shanghai 201203, China;2. Shanghai Engineering Research Center of Pharmaceutical Translation & Shanghai Industrial Technology Institute, Shanghai 201203, China;3. School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China;4. Shanghai Industrial Technology Institute, Shanghai 201203, China |
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Abstract: | The application of next-generation sequencing (NGS) technology in cancer is influenced by the quality and purity of tissue samples. This issue is especially critical for patient-derived xenograft (PDX) models, which have proven to be by far the best preclinical tool for investigating human tumor biology, because the sensitivity and specificity of NGS analysis in xenograft samples would be compromised by the contamination of mouse DNA and RNA. This definitely affects downstream analyses by causing inaccurate mutation calling and gene expression estimates. The reliability of NGS data analysis for cancer xenograft samples is therefore highly dependent on whether the sequencing reads derived from the xenograft could be distinguished from those originated from the host. That is, each sequence read needs to be accurately assigned to its original species. Here, we review currently available methodologies in this field, including Xenome, Disambiguate, bamcmp and pdxBlacklist, and provide guidelines for users. |
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Keywords: | Patient-derived xenograft Next-generation sequencing Host contamination control Alignment |
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