Animal sciences & veterinary medicine |
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Analysis of the characteristics of porcine antibody repertoire by high-throughput sequencing method |
Chunmiao JI1,2( ),Bin WANG1,Pan QIN1,Yaowei HUANG1( ) |
1.Institute of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China 2.Zhaoqing Branch Center of Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, Zhaoqing 526238, Guangdong, China |
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Abstract The adaptive immune system can protect the body from various pathogens by producing a variety of antibodies. The antibody repertoire is so vast that the traditional low-throughput sequencing method cannot completely sequence it. In this study, the library of porcine B cell receptor (BCR) heavy chain was amplified from porcine peripheral blood mononuclear cell (PBMC) by multiplex polymerase chain reaction (PCR). The characteristics of porcine antibody repertoire were analyzed by next-generation sequencing. The results showed that several IGHV, IGHD and IGHJ genes were preferentially used by three-week-old piglets under normal conditions, and IGHV1-4 and IGHV1S2 were the two most frequently used variable (V) genes. The total frequencies of the use of eight IGHV genes accounted for more than 80%. In addition, the length of heavy chain complementarity determining region 3 (HCDR3) was a normal distribution with the average length of 15.8 amino acids. This study successfully constructs a high-throughput sequencing method suitable for porcine antibody repertoire, which provides an effective approach for further understanding the specific composition of it in physiological and pathological states.
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Received: 20 October 2020
Published: 27 October 2021
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Corresponding Authors:
Yaowei HUANG
E-mail: jichunmiaomiao@163.com;yhuang@zju.edu.cn
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利用高通量测序技术分析猪抗体库的组成特征
宿主适应性免疫系统通过产生种类多样的抗体保护其免受病原侵害,而传统的低通量测序方法无法完成对宿主抗体库的测序。本研究通过多重聚合酶链反应(polymerase chain reaction, PCR)从猪外周血单个核细胞(peripheral blood mononuclear cell, PBMC)中扩增获得猪B细胞受体(B cell receptor, BCR)重链文库,经二代测序建立并分析健康猪抗体库的组成特征。结果表明:3周龄仔猪在正常情况下对抗体库IGHV、IGHD、IGHJ基因使用具有偏好性,其中IGHV1-4和IGHV1S2是使用最频繁的2种V(variable)基因,有8种IGHV基因的使用频率之和超过80%,另外发现重链互补决定区3(heavy chain complementarity determining region 3, HCDR3)的长度呈正态分布,平均长度约为15.8个氨基酸。本研究成功建立了适用于猪抗体库的高通量测序方法,可为未来进一步深入理解不同状态(生理、病理)猪抗体库的特异性组成提供有效的研究方法。
关键词:
猪,
抗体库,
组成,
高通量测序,
方法
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