Siquan Sun, PhD

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Siquan Sun, PhD

Scientific Director

Janssen R&D

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Bio

Siquan Sun, Ph.D. is a group leader within Janssen Immunology Discovery where he leads a team focused on early drug discovery in innate immunity.


Siquan joined the Immunology team at Johnson & Johnson in La Jolla in 1998 to initially develop cellular and in vivo models for the cathepsin S program, later led an in vivo pharmacology group to support all programs. He has since led or contributed to multiple NMEs accepted for clinical development. 


Siquan is a member of Janssen Immunology Discovery Leadership Team, and contributed to a number of key internal and external efforts in the past years, including as a Janssen liaison in The RNAi Consortium 3 (TRC3) at Broad Institute, as the leader of JNJPRD/Sanford-Burnham Inflammation Screening Alliance, and leading research collaborations with academic KOLs at University of Michigan, NYU and HHMI.  He has mentored three postdoc fellows and has 50 peer-reviews publications and a book chapter, and over 16 patents or patent applications.


Siquan earned his undergraduate degree at University of Science and Technology of China, Hefei, China. He subsequently obtained his Ph.D. in Molecular Biology at Mayo Graduate School, Rochester, Minnesota. Prior to joining J&J, Siquan did his postdoctoral training in Cellular Immunology with Dr. Jon Sprent at The Scripps Research Institute.