Characteristic analysis of TCR β-chain CDR3 repertoire for pre-and post-liver transplantation
Metrics: PDF 699 views | HTML 1403 views | ?
Guiqi Yang1,*, Minglin Ou1,2,*, Huaizhou Chen1, Changchun Guo3, Jiejing Chen1, Hua Lin1, Donge Tang2, Wen Xue1, Wenlong Li4, Weiguo Sui1 and Yong Dai2
1Guangxi Key Laboratory of Metabolic Diseases Research, Guilin 541002, P.R. China
2Clinical Medical Research Center, The Second Clinical Medical College of Jinan University, Shenzhen, Guangdong 518020, P.R. China
3The Pingshan People’s Hospital of Shenzhen, Shenzhen, Guangdong 518118, P.R. China
4The Technology Company of iCarbonX, Shenzhen, Guangdong 518000, P.R. China
*These authors contributed equally to this work
Weiguo Sui, email: email@example.com
Yong Dai, email: firstname.lastname@example.org
Keywords: T cell receptor; immune repertoire; next-generation sequencing; liver transplantation
Received: February 07, 2018 Accepted: September 10, 2018 Published: October 02, 2018
Liver cirrhosis of hepatitis B is an immune-related disease in which liver cells die during the body’s immune system activation to clear the virus, and the progress is closely related to T lymphocytes. T lymphocyte cells recognise antigens, specifically by major histocompatibility complex (MHC), through a membrane protein T cell receptor (TCR). Here, we used high throughput immune repertoire sequencing technique to study the characteristics and diversity of the TCR repertoire between patients who underwent liver transplantation and healthy controls (NC). We sequenced the TCR β-chain complementary-determining region 3 (CDR3) repertoire in peripheral blood mononuclear cells (PBMCs) from 6 liver transplantation patients before transplantation (Pre) and on the first (Post1) and seventh days (Post7) after transplantation along with 6 NC. We observed that the distributions of CDR3, VD indel, and DJ indel lengths were similar among the Pre, Post1, Post7 and NC groups. We found that the TCR repertoire diversity of transplantation groups was relatively lower compared to NC group. The Pre-group had more highly expanded T cell clones compared to Post1, Post7 and NC groups, and the diversity of the T cell repertoire of the Post7 group was significantly decreased compared to the Pre, Post1 and NC groups. In addition, we found our results also show that various TRBV expression increased and some public sequences at different time points after liver transplantation, and the expression levels of 3 TRBV segments and 2 TRBJ segments were also significantly different in Pre, Post1, Post7 and NC groups. Moreover, 1 aa sequence shared by all liver transplantation patients and 2 aa sequences shared by at least two groups, which may serve as biomarkers to monitor the immune status of liver transplant patients.
All site content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 License.