• 1. Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China;
  • 2. ;
  • 3. ;
ZhouWenhao, Email: zwhchfu@126.com; SongYuanlin, Email: ylsong70@163.com
Export PDF Favorites Scan Get Citation

Objective  To investigate specific changes of T cell repertoire in convalescent patients infected by influenza A (H7N9) virus. Methods  Peripheral blood samples from 8 convalescent patients infected by H7N9 virus and 10 healthy donors were collected. After extracting whole DNA from these samples, arm-PCR were performed and the products were submitted to Illumina HiSeq2000 platform to produce deep sequencing data of the nucleotide sequences of complementary determining region 3 of T cell receptor β chain (TRB). Differences were compared in TRB diversity and V-D-J gene usage and similarities of sequences between the patients and the healthy donors. Results  Frequency of V-D-J gene usage was different between the H7N9 patient group and the healthy group, such as TRBV30, TRBV27, and TRBV18 (Student's t test, P < 05). Main component analysis showed V-J pairing pattern was significantly different between two groups, which may have potential in identifying patients from healthy people. A considerable number of shared CDR3s were found in patient-patient pairs and normal-normal pairs, while seldom were found in patient-normal pairs. The similarity between patients was also confirmed by overlap distance analysis. Indexes for assessing diversity of immune repertoires, Shannon-Weiner index and Simpson index, were both lower in the patients (Student's t test, P < 05), suggesting that the immune system of the patients had not recovered 6 months after H7N9 infection. Compared with the healthy donors, the number of hyper-expression clones increased in the patient group, and some of them showed similarity among patients. Conclusions  TRB repertoires are less diverse in patients with increased hyper-expressed clones and identifiable V-J usage pattern, which is identifiable from normal population. These results suggest that there are H7N9-specific changes in TRB repertoires of H7N9 infected patients in convalescent phase, which have potential implication in diagnosis and therapeutic T cell development.

Citation: Hou Dongni, He Fusheng, Wang Mingbang, Chen Cuicui, Wang Baoqing, Zhou Wenhao, Song Yuanlin. Features of T Cell Receptor Repertoires of Influenza H7N9 Virus Infected Patients in Convalescence. Chinese Journal of Respiratory and Critical Care Medicine, 2016, 15(5): 429-436. doi: 10.7507/1671-6205.2016102 Copy

  • Next Article

    Effects and Safety of Procalcitonin-Guided Algorithms of Antibiotic Therapy in Critically Ill Patients: A Meta-Analysis