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Ferrari L, Martelli P, Saleri R, De Angelis E, Ferrarini G, Cavalli V, Passeri B, Bazzoli G, Ogno G, Magliani W, Borghetti P. An engineered anti-idiotypic antibody-derived killer peptide (KP) early activates swine inflammatory monocytes, CD3 +CD16 + natural killer T cells and CD4 +CD8α + double positive CD8β + cytotoxic T lymphocytes associated with TNF-α and IFN-γ secretion. Comp Immunol Microbiol Infect Dis 2020; 72:101523. [PMID: 32758800 DOI: 10.1016/j.cimid.2020.101523] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 07/15/2020] [Accepted: 07/19/2020] [Indexed: 12/19/2022]
Abstract
This study evaluated the early modulation of the phenotype and cytokine secretion in swine immune cells treated with an engineered killer peptide (KP) based on an anti-idiotypic antibody functionally mimicking a yeast killer toxin. The influence of KP on specific immunity was investigated using porcine reproductive and respiratory syndrome virus (PRRSV) and porcine circovirus type 2 (PCV2) as ex vivo antigens. Peripheral blood mononuclear cells (PBMC) from healthy pigs were stimulated with KP and with a scramble peptide for 20 min, 1, 4 and 20 h or kept unstimulated. The cells were analyzed using flow cytometry and ELISA. The same time-periods were used for KP pre-incubation/co-incubation to determine the effect on virus-recalled interferon-gamma (IFN-γ) secreting cell (SC) frequencies and single cell IFN-γ productivity using ELISPOT. KP induced an early dose-dependent shift to pro-inflammatory CD172α+CD14+high monocytes and an increase of CD3+CD16+ natural killer (NK) T cells. KP triggered CD8α and CD8β expression on classical CD4-CD8αβ+ cytotoxic T lymphocytes (CTL) and double positive (DP) CD4+CD8α+ Th memory cells (CD4+CD8α+low CD8β+low). A fraction of DP cells also expressed high levels of CD8α. The two identified DP CD4+CD8α+high CD8β+low/+high CTL subsets were associated with tumor necrosis factor alpha (TNF-α) and IFN-γ secretion. KP markedly boosted the reactivity and cross-reactivity of PRRSV type-1- and PCV2b-specific IFN-γ SC. The results indicate the efficacy of KP in stimulating Th1-biased immunomodulation and support studies of KP as an immunomodulator or vaccine adjuvant.
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Affiliation(s)
- Luca Ferrari
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
| | - Paolo Martelli
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
| | - Roberta Saleri
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
| | - Elena De Angelis
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
| | - Giulia Ferrarini
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
| | - Valeria Cavalli
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
| | - Benedetta Passeri
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
| | - Gianluca Bazzoli
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
| | - Giulia Ogno
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
| | - Walter Magliani
- Department of Medicine and Surgery, University of Parma, Via Gramsci, 14 - 43126, Parma, Italy.
| | - Paolo Borghetti
- Department of Veterinary Science, University of Parma, Strada del Taglio, 10 - 43126, Parma, Italy.
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Khatun A, Nazki S, Jeong CG, Gu S, Mattoo SUS, Lee SI, Yang MS, Lim B, Kim KS, Kim B, Lee KT, Park CK, Lee SM, Kim WI. Effect of polymorphisms in porcine guanylate-binding proteins on host resistance to PRRSV infection in experimentally challenged pigs. Vet Res 2020; 51:14. [PMID: 32075688 PMCID: PMC7031929 DOI: 10.1186/s13567-020-00745-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 01/14/2020] [Indexed: 02/07/2023] Open
Abstract
Guanylate-binding proteins (GBP1 and GBP5) are known to be important for host resistance against porcine reproductive and respiratory syndrome virus (PRRSV) infection. In this study, the effects of polymorphisms in GBP1 (GBP1E2 and WUR) and GBP5 on host immune responses against PRRSV were investigated to elucidate the mechanisms governing increased resistance to this disease. Seventy-one pigs [pre-genotyped based on three SNP markers (GBP1E2, WUR, and GBP5)] were assigned to homozygous (n = 36) and heterozygous (n = 35) groups and challenged with the JA142 PRRSV strain. Another group of nineteen pigs was kept separately as a negative control group. Serum and peripheral blood mononuclear cells (PBMCs) were collected at 0, 3, 7, 14, 21 and 28 days post-challenge (dpc). Viremia and weight gain were measured in all pigs at each time point, and a flow cytometry analysis of PBMCs was performed to evaluate T cell activation. In addition, 15 pigs (5 pigs per homozygous, heterozygous and negative groups) were sacrificed at 3, 14 and 28 dpc, and the local T cell responses were evaluated in the lungs, bronchoalveolar lavage cells (BALc), lymph nodes and tonsils. The heterozygous pigs showed lower viral loads in the serum and lungs and higher weight gains than the homozygous pigs based on the area under the curve calculation. Consistently, compared with the homozygous pigs, the heterozygous pigs exhibited significantly higher levels of IFN-α in the serum, proliferation of various T cells (γδT, Th1, and Th17) in PBMCs and tissues, and cytotoxic T cells in the lungs and BALc. These results indicate that the higher resistance in the pigs heterozygous for the GBP1E2, WUR and GBP5 markers could be mediated by increased antiviral cytokine (IFN-α) production and T cell activation.
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Affiliation(s)
- Amina Khatun
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea.,Department of Pathology, Faculty of Animal Science and Veterinary Medicine, Sher-e-Bangla Agricultural University, Dhaka, 1207, Bangladesh
| | - Salik Nazki
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea
| | - Chang-Gi Jeong
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea
| | - Suna Gu
- College of Environmental & Biosource Science, Division of Biotechnology, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea
| | - Sameer Ul Salam Mattoo
- College of Environmental & Biosource Science, Division of Biotechnology, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea
| | - Sim-In Lee
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea
| | - Myun-Sik Yang
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea
| | - Byeonghwi Lim
- College of Agriculture, Life & Environment Sciences, Department of Animal Science, Chungbuk National University, Cheongju, South Korea
| | - Kwan-Suk Kim
- College of Agriculture, Life & Environment Sciences, Department of Animal Science, Chungbuk National University, Cheongju, South Korea
| | - Bumseok Kim
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea
| | - Kyoung-Tae Lee
- National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Choi-Kyu Park
- College of Veterinary Medicine, Kyoungpook National University, Daegu, South Korea
| | - Sang-Myeong Lee
- College of Environmental & Biosource Science, Division of Biotechnology, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea.
| | - Won-Il Kim
- College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeollabuk-do, 54596, South Korea.
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