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Yongqun "Oliver" He, DVM, PhD headshot

Yongqun “Oliver” He, DVM, PhD

Associate Professor, Unit for Laboratory Animal Medicine (ULAM)

ULAM Faculty

Unit for Laboratory Animal Medicine (ULAM)

yongqunh@umich.edu

Profile

Dr. He’s laboratory performs dry-lab (bioinformatics lab) and wet-lab (microbiology and immunology lab) biomedical research, and is focused on the areas of bioinformatics, systems biology, host-Brucella¬†interaction, and vaccine research.

The laboratory’s primary bioinformatics research has many topics:

  1. Ontology development. Dr. He has initiated and led the development of several community-based ontologies, including Vaccine Ontology (VO), Ontology of Adverse Events (OAE), Ontology of Genes and Genomes (OGG), and Interaction Network Ontology (INO). They are also leading or participating in the development of several other ontologies. These ontologies can be used in many applications such as data integration and literature mining.
  2. Ontology tool development. Dr. He’s lab has developed many¬†ontology software programs, such as¬†OntoFox¬†and¬†Ontobee, which are widely used for ontology reuse, ontology development, and ontology applications.
  3. Literature mining, with a focus on ontology-based literature mining approaches.
  4. Bayesian network (BN) modeling. BNs can model linear, nonlinear, combinatorial, and stochastic relationships among variables across multiple levels of biological organizations. The lab has developed new BN algorithms and tools for analysis of gene interaction networks using high throughput gene expression data.

The above and other bioinformatics approaches have been used primarily in the following research areas:

  1. Vaccine Informatics.¬†Dr. He’s lab has developed the VIOLIN vaccine database and analysis system. As a part of VIOLIN, they have developed Vaxign, the first web-based publicly available vaccine target design tool based on bioinformatics analysis of genome sequences using the strategy of reverse vaccinology.
  2. Bioinformatics analysis of host-microbe interactions. The lab is interested in developing and applying bioinformatics methods to study the intricate interactions between host (e.g., human and mouse) and microbes (pathogens or bacterial microbiota).
  3. Analysis of vaccine and drug adverse event mechanisms. The lab is also interested in applying the Ontology of Adverse Events to study the mechanisms of vaccine and drug-induced adverse events, and has conducted comparative genomics research.

Dr. He’s wet-lab research is focused on the study of Brucella, a facultative intracellular bacterium that causes brucellosis, one of the most common zoonotic diseases in the world in humans and a variety of animal species. Current wet-lab Brucella research focuses on the analysis of caspase-2-mediated cell death mechanism and its role in Brucella pathogenesis and immunity. The lab’s studies first identified a new caspase-2-mediated proinflammatory cell death, which exists in macrophages and dendritic cells infected with live attenuated rough Brucella strains (e.g., B. abortus cattle vaccine RB51 and B. suis vaccine candidate VTRS1 ‚Äď see references: Bronner, O’Riordan, and He, 2013; Li & He, 2012; Chen et al, 2011; Chen & He, 2009. This type of cell death is different from non-proinflammatory apoptosis or caspase-1-mediated proinflammatory pyroptosis, so the lab named the cell death “caspase-2-mediated pyroptosis”. Interestingly, virulent Brucella inhibits such cell death in infected macrophages (He et al, 2006) but not in dendritic cells (Li & He, 2012).

Based on the study of the RB51-macrophage interaction model, endoplasmic reticulum stress activates the inflammasome via NLRP3- and caspase-2-driven mitochondrial damage (Bronner et al, 2015). Caspase-2 is critical in regulating cell death, DNA damage, stress, cancer, and microbial infections. This research aims to continuously elucidate the caspase-2-mediated proinflammatory cell death pathway and its biological effect on microbial pathogenesis and protective immunity against brucellosis and other diseases. Dr. He’s lab is also interested in the study of the roles of caspase-2 in host responses induced by other vaccines (e.g., tuberculosis vaccine BCG). The lab’s current wet-lab vaccine mechanism research is conducted at a BSL2 laboratory.

For more information, please visit the He Laboratory Group website.

Professional Background

  • Laboratory Animal Medicine, Microbiology and Immunology, and Bioinformatics
  • DVM,¬†Jiangxi Agricultural University (China), 1991
  • PhD, Virginia Polytechnic Institute and State University, 2000

SELECTED PUBLICATIONS

  1. Lin Y, Xiang Z, and He Y. Ontology-based representation and analysis of host-Brucella interactions. J Biomed Semantics. 2015, 6:37. DOI: 10.1186/s13326-015-0036-y. PMID: 26445639. PMCID: PMC4594885.
  2. Hur J, √Ėzg√ľr A, Xiang Z, He Y.¬†Development and application of an Interaction Network Ontology for literature mining of vaccine-associated gene-gene interactions.¬†Journal of Biomedical Semantics. 2015,¬†6:2. doi:10.1186/2041-1480-6-2. PMID:¬†25785184. PMCID:¬†PMC4362819.
  3. Sarntivijai S, Lin Y, Xiang Z, Meehan TF, Diehl AD, Vempati UD, Sch√ľrer TC, Pang C, Malone J, Parkinson H, Liu Y, Takatsuki T, Saijo K, Masuya H, Nakamura Y, Brush MH, Haendel MA, Zheng J, Stoeckert CJ, Peters B, Mungall CJ, Carey TE, States DJ, Athey BD, He Y.¬†CLO: The Cell Line Ontology.¬†Journal of Biomedical Semantics. 2014,¬†5:37. doi:10.1186/2041-1480-5-37. PMID:¬†25852852. PMCID:¬†PMC4387853.
  4. Yongqun He Y, Sirarat Sarntivijai, Yu Lin, Zuoshuang Xiang, Abra Guo, Shelley Zhang, Desikan Jagannathan, Luca Toldo, Cui Tao and Barry Smith. OAE: The Ontology of Adverse Events. Journal of Biomedical Semantics. 2014, 5:29  doi:10.1186/2041-1480-5-29. PMID: 25093068. PMCID: PMC4120740.
  5. He Y. Ontology-supported research on vaccine efficacy, safety, and integrative biological networks. Expert Reviews in Vaccines. 2014 Jul;13(7):825-41. PMID: 24909153.
  6. He Y, Racz R, Sayers S, Lin Y, Todd T, Hur J, Li X, Patel M, Zhao B, Chung M, Ostrow J, Sylora A, Dungarani P, Ulysse G, Kochhar K, Vidri B, Strait K, Jourdian GW, Xiang Z. Updates on the web-based VIOLIN vaccine database and analysis system. Nucleic Acids Research. 2014. 42 (D1): D1124-D1132. doi: 10.1093/nar/gkt1133. First published online: November 19, 2013. [PDF]. PMID: 24259431. PMCID: PMC3964998.
  7. Bronner DN, O’Riordan MXD, He Y.¬†Caspase-2 mediates a¬†Brucella abortus¬†RB51-induced hybrid cell death having features of apoptosis and pyroptosis.¬†Frontiers in Cellular and Infection Microbiology. 2013.¬†3:83. PMID:¬†24350060. PMCID:¬†PMC3842122.
  8. Racz R, Chung M, Xiang Z, and He Y. Systematic annotation and analysis of ‚Äúvirmugens‚ÄĚ – virulence factors whose mutants can be used as live attenuated vaccines.¬†Vaccine. December 6, 2012. DOI: 10.1016/j.vaccine.2012.11.066. PMID: 23219434.
  9. Sarntivijai S, Xiang Z, Shedden KA, Markel H, Omenn GS, Athey BD, and He Y. Ontology-based combinatorial comparative analysis of adverse events associated with killed and live influenza vaccines. PLoS ONE. 2012, 7(11): e49941. PMID: 23209624.
  10. Chen F, Ding X, Ding Y, Xiang Z, Li X, Ghosh D, Schurig GG, Sriranganathan N, Boyle SM, He Y. Proinflammatory caspase-2 mediated macrophage cell death induced by rough attenuated Brucella suis. Infection and Immunity. 2011 Jun;79(6):2460-9. PMID: 21464087.
  11. Xiang Z, Courtot M, Brinkman RR, Ruttenberg A, He Y. OntoFox: web-based support for ontology reuse. BMC Research Notes. 2010, 3:175. PMID: 20569493. PMCID: PMC2911465.
  12. He Y, Xiang Z, Mobley HLT. Vaxign: the first web-based vaccine design program for reverse vaccinology and an application for vaccine development. Journal of Biomedicine and Biotechnology. Volume 2010 (2010), Article ID 297505, 15 pages. [PMID: 20671958]. PMCID: PMC2910479.
  13. Xiang Z, Minter RM, Bi X, Woolf PJ, He Y. miniTUBA: medical inference by network integration of temporal data using Bayesian analysis. Bioinformatics. 2007 Sep 15;23(18):2423-32. PMID: 17644819.

See additional publication updates at: http://www.hegroup.org/publications.html

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