Nan-Ping Peter Weng, M.D., Ph.D.

Senior Investigator

Laboratory of Molecular Biology and Immunology


251 Bayview Boulevard
Suite 100
Baltimore, MD 21224


Research Topics

Age-associated changes in the adaptive immune system are complex and highly consequential for the health and wellbeing of older humans. What we have learned for the past decades are alterations of compositions of T and B cells and their functions with advance of age. However, the mechanisms underlying these age-related changes in lymphocytes are not fully understood. Our research interests are 1) to identify the key transcriptome and epigenetic changes that causes age-related reduced functions of CD8 T cells including both naïve and memory cells. We are applying the genomic and molecular techniques and methods including RNAseq, scRNAse, ATACseq and ChIPseq to analyze human and mouse T cells; 2) to determine the size of general and antigen-specific ab TCR repertoires and their changes with age. We have incorporated tetramer staining and cell sort to isolate antigen specific CD8 T cells for their repertoire and individual TCR structure and function analyses using deep sequencing and x-ray crystal structures; and 3) to elucidate the role of telomere and telomerase in regulation of lymphocyte proliferation and function in human longitudinal follow-up samples as well as genetically modified mouse models. Collectively, we hope to elucidate the mechanisms underlying age-associated changes in T cells.


Dr. Weng received his M.D. from Fudan University Shanghai Medical College (former Shanghai First Medical College), China in 1984 and Ph.D. in Immunology from Baylor College of Medicine in 1993. He obtained his postdoctoral training at National Cancer Institute, NIH. He joined the Laboratory of Immunology at NIA as a tenure-track investigator in 1997 and was tenured in 2006.

Selected Publications

  1. Chen G, Yang X, Ko A, Sun X, Gao M, Zhang Y, Shi A, Mariuzza RA, Weng NP. Sequence and Structural Analyses Reveal Distinct and Highly Diverse Human CD8+ TCR Repertoires to Immunodominant Viral Antigens. Cell Rep. 2017;19(3):569-583.

  2. Chen G, Subedi K, Chakraborty S, Sharov A, Lu J, Kim J, Mi X, Wersto R, Sung MH, Weng NP. Ezh2 Regulates Activation-Induced CD8+ T Cell Cycle Progression via Repressing Cdkn2a and Cdkn1c Expression. Front Immunol. 2018;9:549.

  3. Meier HCS, Parks CG, Liu HB, Sandler DP, Simonsick EM, Deane K, Weng NP. Cellular aging over 13 years associated with incident antinuclear antibody positivity in the Baltimore Longitudinal Study of Aging. J Autoimmun. 2019;105:102295.

  4. Patrick MS, Cheng NL, Kim J, An J, Dong F, Yang Q, Zou I, Weng NP. Human T Cell Differentiation Negatively Regulates Telomerase Expression Resulting in Reduced Activation-Induced Proliferation and Survival. Front Immunol. 2019;10:1993.

  5. Ko A, Watanabe M, Nguyen T, Shi A, Achour A, Zhang B, Sun X, Wang Q, Zhuang Y, Weng NP, Hodes RJ. TCR Repertoires of Thymic Conventional and Regulatory T Cells: Identification and Characterization of Both Unique and Shared TCR Sequences. J Immunol. 2020;204(4):858-867.

This page was last updated on April 10th, 2021