1. PhenoTagger: a hybrid method for phenotype concept recognition using human phenotype ontology
- Author
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Zhiyong Lu, Rajarshi Ghosh, Daniel Veltri, Morgan Similuk, Andrew J. Oler, Shankai Yan, Ling Luo, Po-Ting Lai, Sandhya Xirasagar, and Peter N. Robinson
- Subjects
FOS: Computer and information sciences ,Statistics and Probability ,Source code ,Phrase ,Computer science ,media_common.quotation_subject ,Ontology (information science) ,computer.software_genre ,Biochemistry ,Annotation ,Disease Ontology ,Human Phenotype Ontology ,Molecular Biology ,media_common ,Computer Science - Computation and Language ,Training set ,business.industry ,Deep learning ,Biomedical text mining ,Computer Science Applications ,Computational Mathematics ,ComputingMethodologies_PATTERNRECOGNITION ,Computational Theory and Mathematics ,Artificial intelligence ,business ,Computation and Language (cs.CL) ,computer ,Feature learning ,Natural language processing ,Sentence - Abstract
Automatic phenotype concept recognition from unstructured text remains a challenging task in biomedical text mining research. Previous works that address the task typically use dictionary-based matching methods, which can achieve high precision but suffer from lower recall. Recently, machine learning-based methods have been proposed to identify biomedical concepts, which can recognize more unseen concept synonyms by automatic feature learning. However, most methods require large corpora of manually annotated data for model training, which is difficult to obtain due to the high cost of human annotation. In this paper, we propose PhenoTagger, a hybrid method that combines both dictionary and machine learning-based methods to recognize Human Phenotype Ontology (HPO) concepts in unstructured biomedical text. We first use all concepts and synonyms in HPO to construct a dictionary, which is then used to automatically build a distantly supervised training dataset for machine learning. Next, a cutting-edge deep learning model is trained to classify each candidate phrase (n-gram from input sentence) into a corresponding concept label. Finally, the dictionary and machine learning-based prediction results are combined for improved performance. Our method is validated with two HPO corpora, and the results show that PhenoTagger compares favorably to previous methods. In addition, to demonstrate the generalizability of our method, we retrained PhenoTagger using the disease ontology MEDIC for disease concept recognition to investigate the effect of training on different ontologies. Experimental results on the NCBI disease corpus show that PhenoTagger without requiring manually annotated training data achieves competitive performance as compared with state-of-the-art supervised methods., Accepted by Bioinformatics
- Published
- 2021