Friday, 16 September 2016

Composition and Variation Analysis of the TCR -Chain CDR3 Repertoire in Systemic Lupus Erythematosus Using High-Throughput Sequencing

Sui et al. used a combination of multiplex-PCR, Illumina sequencing and IMGT/High V-QUEST for a standardized analysis of the characteristics and polymorphisms of the T-cell receptor β chain Complementarity-Determining region 3 (TCRβ CDR3) genes in T cells from Systemic Lupus Erythematosus (SLE) patients and healthy donors (NC). However, there are several issues which warrant further consideration. Herein, we will discuss this topic.

High-Throughput Sequencing

It’s honoured to provide a brief commentary on the brilliant study of Sui et al. concerning the T cell immune repertoire sequencing (IRSEQ). IR-SEQ refers to a method to evaluate the diversity of immune system by amplifying the Complimentary Determining Region (CDR) of B-cell Receptor (BCR) or T-cell Receptor (TCR) using multiple-PCR or 5'RACE methods, followed by high-throughput sequencing, which can be used to investigate the association between immune repertoire and diseases.

The authors found that there were more expanded clones and more restricted T-cell repertoire in the SLE group compared to the NC group. Also, SLE patients showed different usage frequencies of TRBV and TRBJ segments compared to NC group. 

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