Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (6): 1362-1370.doi: 10.11843/j.issn.0366-6964.2020.019

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

Effect of Trichinella spiralis Recombinant Dipeptidyl-peptidase 1 on Proliferation, Phagocytosis, and Apoptosis of Rat PBMCs in vitro

LIAO Shuyi, CHU Wen, XU Lixin, SONG Xiaokai, LI Xiangrui, YAN Ruofeng*   

  1. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2019-12-09 Online:2020-06-25 Published:2020-06-23

Abstract: This research aimed to investigate the effect of Trichinella spiralis dipeptidyl-peptidase 1 (Dpp1) on rat peripheral blood mononuclear cell (PBMC) proliferation, migration, apoptosis, nitric oxide secretion and phagocytosis in vitro. A pair of primers were designed based on Dpp1 gene nucleotides in GenBank, Dpp1 gene was cloned by RT-PCR and the expression vector was constructed to obtain the recombinant protein (rDpp1). The reactogenicity of rDpp1 was analyzed by Western blot. PBMCs were separated from rats and co-incubated with rDpp1 in vitro,binding of rDpp1 with rat PBMCs was confirmed by immunofluorescence assay (IFA), and the effects of different concentration of rDpp1 (10, 20, 40 μg·mL-1) on cell proliferation,migration,nitric oxide production,phagocytosis and apoptosis were determined. The results showed that rDpp1 at a concentration of 40 μg·mL-1 significantly promoted the proliferation of PBMCs; rDpp1 at 10 μg·mL-1 could promote cell migration, while 20 and 40 μg·mL-1 concentrations showed a significant promotion; rDpp1 with 40 μg·mL-1 concentration significantly promoted NO secretion; rDpp1 with 10 μg·mL-1 promoted cell phagocytosis, and 20 and 40 μg·mL-1 concentrations showed very significant promotion; each concentration of proteins could significantly promote the apoptosis of PBMCs. The functions of rat PBMCs were influenced by T. spiralis dipeptidyl-peptidase 1 via different pathways.

Key words: Trichinella spiralis, dipeptidyl-peptidase 1, peripheral blood mononuclear cells, phagocytosis, apoptosis

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