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Diep AN, Schyns J, Gourzones C, Goffin E, Papadopoulos I, Moges S, Minner F, Ek O, Bonhomme G, Paridans M, Gillain N, Husson E, Garigliany M, Darcis G, Saegerman C, Desmecht D, Guillaume M, A F D, Bureau F, Gillet L. How do successive vaccinations and SARS-CoV-2 infections impact humoral immunity dynamics: An 18-month longitudinal study. J Infect 2024; 88:183-186. [PMID: 37981216 DOI: 10.1016/j.jinf.2023.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 11/15/2023] [Indexed: 11/21/2023]
Affiliation(s)
- A N Diep
- Biostatistics and Research Method Center - Public Health Department, Liège University, 4000 Liège, Belgium
| | - J Schyns
- Laboratory of Cellular and Molecular Immunology, GIGA Institute, Liège University, 4000 Liège, Belgium; COVID-19 Platform, Liège University, 4000 Liège, Belgium
| | - C Gourzones
- COVID-19 Platform, Liège University, 4000 Liège, Belgium; Laboratory of Immunology-Vaccinology, FARAH, Liège University, 4000 Liège, Belgium
| | - E Goffin
- COVID-19 Platform, Liège University, 4000 Liège, Belgium; Laboratory of Immunology-Vaccinology, FARAH, Liège University, 4000 Liège, Belgium
| | - I Papadopoulos
- Biostatistics and Research Method Center - Public Health Department, Liège University, 4000 Liège, Belgium
| | - S Moges
- Biostatistics and Research Method Center - Public Health Department, Liège University, 4000 Liège, Belgium
| | - F Minner
- COVID-19 Platform, Liège University, 4000 Liège, Belgium
| | - O Ek
- COVID-19 Platform, Liège University, 4000 Liège, Belgium
| | - G Bonhomme
- Department of Pathology, FARAH, Liège University, 4000 Liège, Belgium
| | - M Paridans
- From Biostatistics to Health Promotion Research Unit, Public Health Department, Liège University, 4000 Liège, Belgium
| | - N Gillain
- Biostatistics and Research Method Center - Public Health Department, Liège University, 4000 Liège, Belgium; From Biostatistics to Health Promotion Research Unit, Public Health Department, Liège University, 4000 Liège, Belgium
| | - E Husson
- Biostatistics and Research Method Center - Public Health Department, Liège University, 4000 Liège, Belgium; From Biostatistics to Health Promotion Research Unit, Public Health Department, Liège University, 4000 Liège, Belgium
| | - M Garigliany
- Department of Pathology, FARAH, Liège University, 4000 Liège, Belgium
| | - G Darcis
- Infectious Diseases Department, University Hospital of Liège, 4000 Liège, Belgium
| | - C Saegerman
- Research Unit in Epidemiology and Risk Analysis applied to Veterinary Sciences, FARAH, Liège University, 4000 Liège, Belgium
| | - D Desmecht
- Department of Pathology, FARAH, Liège University, 4000 Liège, Belgium
| | - M Guillaume
- From Biostatistics to Health Promotion Research Unit, Public Health Department, Liège University, 4000 Liège, Belgium
| | - Donneau A F
- Biostatistics and Research Method Center - Public Health Department, Liège University, 4000 Liège, Belgium
| | - F Bureau
- Laboratory of Cellular and Molecular Immunology, GIGA Institute, Liège University, 4000 Liège, Belgium; COVID-19 Platform, Liège University, 4000 Liège, Belgium
| | - L Gillet
- COVID-19 Platform, Liège University, 4000 Liège, Belgium; Laboratory of Immunology-Vaccinology, FARAH, Liège University, 4000 Liège, Belgium.
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Vanhersecke L, Gillet L, Le Douget JE, Schmauch B, Maussion C, Italiano A, Soubeyran I, Le Loarer F. 10P Deep learning-based prediction of patient’s TLS status from HE images in pan-cancer cohort. Immuno-Oncology and Technology 2022. [DOI: 10.1016/j.iotech.2022.100115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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3
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Delguste M, Koehler M, Gillet L, Alsteens D. Topography imaging of herpesvirus in native condition using atomic force microscopy. Clin Microbiol Infect 2018; 24:610-611. [DOI: 10.1016/j.cmi.2018.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/15/2018] [Accepted: 03/12/2018] [Indexed: 10/17/2022]
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4
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Tonus C, Connan D, Waroux O, Vandenhove B, Wayet J, Gillet L, Desmecht D, Antoine N, Ectors F, Grobet L. Cryopreservation of chicken primordial germ cells by vitrification and slow freezing: A comparative study. Theriogenology 2017; 88:197-206. [DOI: 10.1016/j.theriogenology.2016.09.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 09/13/2016] [Accepted: 09/13/2016] [Indexed: 11/25/2022]
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5
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Roels E, Dourcy M, Holopainen S, Rajamäki MM, Gillet L, Ehlers B, Clercx C. No Evidence of Herpesvirus Infection in West Highland White Terriers With Canine Idiopathic Pulmonary Fibrosis. Vet Pathol 2016; 53:1210-1212. [PMID: 27106742 DOI: 10.1177/0300985816641991] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In humans, horses, and rodents, an association between pulmonary fibrotic disorders and gammaherpesvirus infection has been suggested. In dogs, canine idiopathic pulmonary fibrosis (CIPF), a progressive fibrotic lung disease of unknown origin and poorly understood pathophysiology, has been reported to occur in West Highland white terriers (WHWTs). The present study investigated the potential association between CIPF and herpesvirus infection. A PCR assay, using a mixture of degenerate and deoxyinosine-substituted primers targeting highly conserved regions of the DNA polymerase gene (DPOL) of herpesviruses, was applied on both lung and blood samples from WHWTs affected with CIPF and controls. Herpesvirus DPOL sequence could not be amplified from any of 46 lung samples (28 affected WHWTs and 18 control dogs of various breeds) and 38 blood samples (19 CIPF WHWTs and 19 control age-matched WHWTs) included. An association between CIPF and herpesvirus infection is therefore unlikely. Investigation of other causes of the disease is warranted.
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Affiliation(s)
- E Roels
- Department of Clinical Sciences, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - M Dourcy
- Department of Infectious and Parasitic Diseases, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - S Holopainen
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
| | - M M Rajamäki
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland
| | - L Gillet
- Department of Infectious and Parasitic Diseases, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - B Ehlers
- Robert Koch-Institute, Berlin, Germany
| | - C Clercx
- Department of Clinical Sciences, FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
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6
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Gillet L, Shy D, Abriel H. Elucidating sodium channel NaV1.5 clustering in cardiac myocytes using super-resolution techniques. Cardiovasc Res 2014; 104:231-3. [DOI: 10.1093/cvr/cvu221] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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7
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Brisson L, Gillet L, Calaghan S, Besson P, Le Guennec JY, Roger S, Gore J. NaV1.5 enhances breast cancer cell invasiveness by increasing NHE1-dependent H+ efflux in caveolae. Oncogene 2010; 30:2070-6. [DOI: 10.1038/onc.2010.574] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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8
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Thirion M, Machiels B, Farnir F, Donofrio G, Gillet L, Dewals B, Vanderplasschen A. Bovine herpesvirus 4 ORF73 is dispensable for virus growth in vitro, but is essential for virus persistence in vivo. J Gen Virol 2010; 91:2574-84. [DOI: 10.1099/vir.0.023192-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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9
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Gillet L, Roger S, Besson P, Gore J, Bougnoux P, Lecaille F, Lalmanach G, Le Guennec J. Voltage-gated sodium channels activity promotes cysteine cathepsins-dependent invasiveness of human cancer cell lines. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)71448-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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10
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Daix V, Schroeder H, Praet N, Georgin JP, Chiappino I, Gillet L, de Fays K, Decrem Y, Leboulle G, Godfroid E, Bollen A, Pastoret PP, Gern L, Sharp PM, Vanderplasschen A. Ixodes ticks belonging to the Ixodes ricinus complex encode a family of anticomplement proteins. Insect Mol Biol 2007; 16:155-66. [PMID: 17298559 DOI: 10.1111/j.1365-2583.2006.00710.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The alternative pathway of complement is an important innate defence against pathogens including ticks. This component of the immune system has selected for pathogens that have evolved countermeasures. Recently, a salivary protein able to inhibit the alternative pathway was cloned from the American tick Ixodes scapularis (Valenzuela et al., 2000; J. Biol. Chem. 275, 18717-18723). Here, we isolated two different sequences, similar to Isac, from the transcriptome of I. ricinus salivary glands. Expression of these sequences revealed that they both encode secreted proteins able to inhibit the complement alternative pathway. These proteins, called I. ricinus anticomplement (IRAC) protein I and II, are coexpressed constitutively in I. ricinus salivary glands and are upregulated during blood feeding. Also, we demonstrated that they are the products of different genes and not of alleles of the same locus. Finally, phylogenetic analyses demonstrate that ticks belonging to the Ixodes ricinus complex encode a family of relatively small anticomplement molecules undergoing diversification by positive Darwinian selection.
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Affiliation(s)
- V Daix
- Immunology-Vaccinology (B43b), Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
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Looze Y, Gillet L, Deconinck M, Leonis J, Gelbcke M. Carbon-13 Nuclear Magnetic Resonance Study of 5′-Substituted-5′-Oeoxyadenosine Derivatives. ANAL LETT 2006. [DOI: 10.1080/00032718008078008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Dewals B, Boudry C, Gillet L, Markine-Goriaynoff N, de Leval L, Haig DM, Vanderplasschen A. Cloning of the genome of Alcelaphine herpesvirus 1 as an infectious and pathogenic bacterial artificial chromosome. J Gen Virol 2006; 87:509-517. [PMID: 16476972 DOI: 10.1099/vir.0.81465-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Alcelaphine herpesvirus 1 (AlHV-1), carried asymptomatically by wildebeest, causes malignant catarrhal fever (MCF) following cross-species transmission to a variety of susceptible species of the order Artiodactyla. The study of MCF pathogenesis has been impeded by an inability to produce recombinant virus, mainly due to the fact that AlHV-1 becomes attenuated during passage in culture. In this study, these difficulties were overcome by cloning the entire AlHV-1 genome as a stable, infectious and pathogenic bacterial artificial chromosome (BAC). A modified loxP-flanked BAC cassette was inserted in one of the two large non-coding regions of the AlHV-1 genome. This insertion allowed the production of an AlHV-1 BAC clone stably maintained in bacteria and able to regenerate virions when transfected into permissive cells. The loxP-flanked BAC cassette was excised from the genome of reconstituted virions by growing them in permissive cells stably expressing Cre recombinase. Importantly, BAC-derived AlHV-1 virions replicated comparably to the virulent (low-passage) AlHV-1 parental strain and induced MCF in rabbits that was indistinguishable from that of the virulent parental strain. The availability of the AlHV-1 BAC is an important advance for the study of MCF that will allow the identification of viral genes involved in MCF pathogenesis, as well as the production of attenuated recombinant candidate vaccines.
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Affiliation(s)
- B Dewals
- Department of Infectious and Parasitic Diseases, Immunology-Vaccinology (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - C Boudry
- Department of Infectious and Parasitic Diseases, Immunology-Vaccinology (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - L Gillet
- Department of Infectious and Parasitic Diseases, Immunology-Vaccinology (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - N Markine-Goriaynoff
- Department of Infectious and Parasitic Diseases, Immunology-Vaccinology (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - L de Leval
- Department of Pathology, Faculty of Medicine, University of Liège, B-4000 Liège, Belgium
| | - D M Haig
- The Moredun Research Institute, Pentlands Science Park, Bush Loan, Penicuik, Midlothian EH26 0PZ, UK
| | - A Vanderplasschen
- Department of Infectious and Parasitic Diseases, Immunology-Vaccinology (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
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13
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Bona C, Dewals B, Wiggers L, Coudijzer K, Vanderplasschen A, Gillet L. Short Communication: Pasteurization of Milk Abolishes Bovine Herpesvirus 4 Infectivity. J Dairy Sci 2005; 88:3079-83. [PMID: 16107396 DOI: 10.3168/jds.s0022-0302(05)72989-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Bovine herpesvirus 4 (BoHV-4) is a gammaherpesvirus highly prevalent in the cattle population that has been isolated from the milk and the serum of healthy infected cows. Several studies reported the sensitivity and the permissiveness of some human cells to BoHV-4 infection. Moreover, our recent study demonstrated that some human cells sensitive but not permissive to BoHV-4 support a persistent infection protecting them from tumor necrosis factor-alpha-induced apoptosis. Together, these observations suggested that BoHV-4 could represent a danger for public health. To evaluate the risk of human infection by BoHV-4 through milk or serum derivatives, we investigated the resistance of BoHV-4 to the mildest thermal treatments usually applied to these products. The results demonstrated that milk pasteurization and thermal decomplementation of serum abolish BoHV-4 infectivity by inactivation of its property to enter permissive cells. Consequently, our results demonstrate that these treatments drastically reduce the risk of human infection by BoHV-4 through treated milk or serum derivatives.
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Affiliation(s)
- C Bona
- Immunology-Vaccinology (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
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14
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Gillet L, Daix V, Donofrio G, Wagner M, Koszinowski UH, China B, Ackermann M, Markine-Goriaynoff N, Vanderplasschen A. Development of bovine herpesvirus 4 as an expression vector using bacterial artificial chromosome cloning. J Gen Virol 2005; 86:907-917. [PMID: 15784885 DOI: 10.1099/vir.0.80718-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Several features make bovine herpesvirus 4 (BoHV-4) attractive as a backbone for use as a viral expression vector and/or as a model to study gammaherpesvirus biology. However, these developments have been impeded by the difficulty in manipulating its large genome using classical homologous recombination in eukaryotic cells. In the present study, the feasibility of exploiting bacterial artificial chromosome (BAC) cloning and prokaryotic recombination technology for production of BoHV-4 recombinants was explored. Firstly, the BoHV-4 genome was BAC cloned using two potential insertion sites. Both sites of insertion gave rise to BoHV-4 BAC clones stably maintained in bacteria and able to regenerate virions when transfected into permissive cells. Reconstituted virus replicated comparably to wild-type parental virus and the loxP-flanked BAC cassette was excised by growing them on permissive cells stably expressing Cre recombinase. Secondly, BoHV-4 recombinants expressing Ixodes ricinus anti-complement protein I or II (IRAC I/II) were produced using a two-step mutagenesis procedure in Escherichia coli. Both recombinants induced expression of high levels of functional IRAC molecules in the supernatant of infected cells. This study demonstrates that BAC cloning and prokaryotic recombination technology are powerful tools for the development of BoHV-4 as an expression vector and for further fundamental studies of this gammaherpesvirus.
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Affiliation(s)
- L Gillet
- Department of Infectious and Parasitic Diseases (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - V Daix
- Department of Infectious and Parasitic Diseases (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - G Donofrio
- Dipartimento di Salute Animale, Facoltà di Medicina Veterinaria, Sezione di Malattie Infettive degli Animali, Università degli Studi di Parma, I-43100 Parma, Italy
| | - M Wagner
- Department of Pathology, Harvard Medical School, Boston, MA 02115, USA
| | - U H Koszinowski
- Department of Virology, Max von Pettenkofer-Institut, Ludwig-Maximilians-Universität München, D-81377 Munich, Germany
| | - B China
- Food Sciences Department (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - M Ackermann
- Institute for Virology, University of Zurich, CH-8057 Zurich, Switzerland
| | - N Markine-Goriaynoff
- Department of Infectious and Parasitic Diseases (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
| | - A Vanderplasschen
- Department of Infectious and Parasitic Diseases (B43b), Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
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Abstract
Bovine subclinical mastitis can be defined as a moderated inflammatory disease characterized by a persistent accumulation of neutrophils in milk. As GMCSF-mediated delay of neutrophil apoptosis contributes to the accumulation of inflammatory cells at the site of inflammation in many human diseases, we sought to determine whether subclinical mastitis in cows is also associated with a GMCSF-dependent increase in milk-neutrophil survival. We first addressed the hypothesis that GMCSF delays bovine neutrophil apoptosis by activation of the signal transducer and activator of transcription (STAT) family members STAT3 and STAT5, which are critical regulators of the expression of various Bcl-2 family proteins. Granulocyte-macrophage colony-stimulating factor significantly delayed apoptosis of blood neutrophils obtained from healthy cows. In these cells, GMCSF activated STAT5, but not STAT3, and induced an increase in the mRNA of the antiapoptotic Bcl-2 member, Bcl-xL. Granulocyte-macrophage colony-stimulating factor-dependent STAT5 activation and up-regulation of Bcl-xL mRNA were blocked by the Jak inhibitor, AG-490. This inhibition was associated with abrogation of the prosurvival effect of GMCSF, demonstrating a key role for STAT5 in delayed neutrophil apoptosis. We further found that GMCSF expression was increased in milk cells from cows affected with subclinical mastitis. Neutrophils from these cows demonstrated a significant delay of apoptosis as compared with neutrophils obtained from healthy cows and were unresponsive to GMCSF. Active STAT5 complexes were detected in these neutrophils. Finally, in the presence of AG-490, apoptosis was induced and a time-dependent down-regulation of Bcl-xL mRNA was observed in milk neutrophils from mastitis-affected cows. These results indicate that neutrophil survival is enhanced in milk of subclinical mastitis-affected cows and suggest a role for a GMCSF-activated STAT5 signaling pathway in this phenomenon. This pathway could thus represent a target for the control of persistent accumulation of neutrophils in the bovine mammary gland.
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Affiliation(s)
- P Boutet
- Department of Physiology, University of Liége, Belgium.
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16
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Gillet L, Minner F, Detry B, Farnir F, Willems L, Lambot M, Thiry E, Pastoret PP, Schynts F, Vanderplasschen A. Investigation of the susceptibility of human cell lines to bovine herpesvirus 4 infection: demonstration that human cells can support a nonpermissive persistent infection which protects them against tumor necrosis factor alpha-induced apoptosis. J Virol 2004; 78:2336-47. [PMID: 14963130 PMCID: PMC369250 DOI: 10.1128/jvi.78.5.2336-2347.2004] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bovine herpesvirus 4 (BoHV-4) is a gammaherpesvirus that has a worldwide distribution in the population of cattle. Many factors make human contamination by BoHV-4 likely to occur. In this study, we performed in vitro experiments to assess the risk and the consequences of human infection by BoHV-4. First, by using a recombinant BoHV-4 strain expressing enhanced green fluorescent protein under the control of the human cytomegalovirus immediate-early gene promoter, we tested 21 human cell lines for their sensitivity and their permissiveness to BoHV-4 infection. These experiments revealed that human cell lines from lymphoid and myeloid origins were resistant to infection, whereas epithelial cells, carcinoma cells, or adenocarcinoma cells isolated from various organs were sensitive but poorly permissive to BoHV-4 infection. Second, by using the HeLa cell line as a model of human cells sensitive but not permissive to BoHV-4 infection, we investigated the resistance of infected cells to apoptosis and the persistence of the infection through cellular divisions. The results obtained can be summarized as follows. (i) BoHV-4 nonpermissive infection of HeLa cells protects them against tumor necrosis factor alpha-induced apoptosis. (ii) BoHV-4 infection of HeLa cells persists in cell culture; however, the percentage of infected cells decreases with time due to erratic transmission of the viral genome through cell division. (iii) BoHV-4 infection has no effect on the rate of HeLa cell division. Altogether, these data suggest that BoHV-4 could infect humans. This study also stresses the importance of considering the insidious effects of nonpermissive infection when the biosafety of animal gammaherpesviruses for humans is being considered.
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Affiliation(s)
- L Gillet
- Immunology-Vaccinology, Faculty of Veterinary Medicine, University of Liège, B-4000 Liège, Belgium
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17
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Ferry G, Gillet L, Bruneau V, Banales JM, Beauverger P, Cogé F, Galizzi JP, Scalbert E, Okamoto T, Urata H, Boutin JA. Development of new assays and improved procedures for the purification of recombinant human chymase. Eur J Biochem 2001; 268:5885-93. [PMID: 11722576 DOI: 10.1046/j.0014-2956.2001.02544.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Chymase mediates a major alternative way of angiotensin II production from angiotensin I beside angiotensin converting enzyme in the final step of the renin-angiotensin system. This enzyme is also involved in other physio-pathological processes such as angiogenesis, atherosclerosis and inflammation. Several purification attempts of natural or recombinant chymase were reported in the literature. Most of these reports were not successful in obtaining the recombinant enzyme in a highly active form and in large quantity. In the present study, we describe a facile route for the purification of the human recombinant chymase. Chymase being produced as inactive prochymase, to be cathepsin C-activated, newly raised anti-chymase Ig were used to follow the purification. In order to complete the available tools for the search of chymase inhibitors, we developed and assessed a new 96-well plate based assay for the measurement of enzyme activity, as well as a low throughput, HPLC-based one. The assays used an original derivative of angiotensin I, or the native hormone. Chymase was produced in CHO cells and appropriately matured. The amount of enzyme obtained at the end of the process is compatible with the medium-throughput screening (up to 10,000 points per day), about 800 microg x L(-1) of culture medium with a specific activity of 6.16 mmol of angiotensin I cleaved per minute per mg of protein. All the biological and technical tools are now available for the discovery of new classes of chymase inhibitors.
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Affiliation(s)
- G Ferry
- Division de Pharmacologie Moléculaire et Cellulaire, Institut de Recherches Servier, Croissy sur Seine, France; Fukuoka University, Department of Cardiology, Fukuoka, Japan; Institut de Recherches Internationales Servier, Courbevoie, France
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18
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Robberecht P, Gillet L, Chatelain P, De Neef P, Camus JC, Vincent M, Sassard J, Christophe J. Specific decrease of secretin/VIP-stimulated adenylate cyclase in the heart from the Lyon strain of hypertensive rats. Peptides 1984; 5:355-8. [PMID: 6473161 DOI: 10.1016/0196-9781(84)90233-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The cardiac adenylate cyclase activity of genetically hypertensive rats from the Lyon strain (LH) was compared to that of Lyon normotensive rats (LN) and that of low blood pressure Lyon rats (LL). The major finding was a 30-35% decrease of secretin- and VIP-stimulated adenylate cyclase activity in cardiac membranes of LH rats that was already obvious in 5 week-old prehypertensive animals: this alteration was apparently specific for the cardiac secretin/VIP-stimulated adenylate cyclase activity, the same activity in membranes from brain, anterior pituitary, and liver being similar in LH, LN and LL rats. It is tempting to conclude that a selective alteration of functional cardiac secretin/VIP receptors in LH rats reflects a local hyperactivity of the sympathetic adrenergic system.
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Gillet L, Robberecht P, Waelbroeck M, Camus JC, De Neef P, König W, Christophe J. Interaction of Gila monster venom with secretin receptors in rat pancreatic membranes. Peptides 1984; 5:407-9. [PMID: 6089139 DOI: 10.1016/0196-9781(84)90244-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The stimulatory effect of Gila monster venom on adenylate cyclase activity in rat pancreatic membranes was compared to that of porcine secretin and porcine VIP. The maximal effect exerted by the venom was identical to that of VIP but significantly lower than that of secretin. The effect of Gila monster venom could, however, be attributed to its interaction with secretin receptors rather than with VIP receptors, at variance with its previously described action on guinea pig pancreatic acini. Adenylate cyclase activation by both Gila monster venom and secretin in rat pancreatic membranes was, indeed: (1) dose-dependently inhibited by two secretin fragments secretin-(4-27) and secretin-(7-27), and (2) more severely depressed than VIP stimulation, after pretreating pancreatic membranes with dithiothreitol (DTT).
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Chatelain P, Gillet L, Waelbroeck M, Camus JC, Robberecht P, Christophe J. Selective alteration of secretin-stimulated cardiac adenylate cyclase activity in streptozotocin-diabetic rats. Horm Metab Res 1983; 15:620-2. [PMID: 6229463 DOI: 10.1055/s-2007-1018808] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Secretin stimulation of adenylate cyclase activity in heart membranes was selectively altered in streptozotocin-diabetic adult male rats suffering from moderately severe diabetes, 40 days after i.v. streptozotocin administration (40 mg/kg body weight). The efficacy of secretin was reduced by 55% whilst its potency was unaffected. By contrast, the stimulation of adenylate cyclase by NaF, GTP, Gpp(NH)p, D,L-isoproterenol, and glucagon remained normal. The present data, together with the markedly reduced secretin response of cardiac adenylate cyclase in genetically obese (fa/fa) Zucker rats might indicate that hypoinsulinemia and insulin resistance both reduce the number of secretin receptors coupled to the adenylate cyclase system, an alteration whose contribution to diabetic cardiomyopathy remains to be determined.
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Christophe J, Kutzner R, Nguyen-Bui ND, Damien C, Chatelain P, Gillet L. Conversion of orally administered 2-n.pentylaminoacetamide into glycinamide and glycine in the rat brain. Life Sci 1983; 33:533-41. [PMID: 6888183 DOI: 10.1016/0024-3205(83)90127-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Male Sprague Dawley albino rats were treated orally with 2-n.pentylaminoacetamide (10 to 100 mg/kg b.wt). This oral administration provoked a dose-related and time-dependent accumulation of glycinamide in forebrain, cerebellum, and medulla, and to increased levels of glycine in the three brain areas, and of serine in medulla. In kidney, liver and plasma, the accumulation of glycinamide was lower and there was no increase in glycine and serine levels. With a dose of 100 mg/kg b.wt, 28% of the drug were eliminated unchanged and 16% as glycinamide, in urines collected for 24 h. In all tissues examined, 2-n.pentylaminoacetamide and glycinamide levels peaked at 1 h and were nil again after 24 h, the ratio of 2-n.pentylaminoacetamide over glycinamide decreasing more rapidly in brain than in kidney and liver. Contrasting with the effects of 2-n.pentylaminoacetamide, the oral administration of glycinamide (66 mg/b.wt) led, 2 hours later, to similar low rises of glycinamide in plasma and brain. In another control experiment, the intraperitoneal injection of a large dose of glycine (450 mg/kg b.wt) provoked, 30 min later, modest rises of glycine levels in the central nervous system that merely reflected a contamination by plasma glycine.
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Gillet L, Looze Y, Deconinck M, Léonis J. Binding capacities of various analogues of S-adenosyl-L-homocysteine to protein methyltransferase II from human erythrocytes. Experientia 1979; 35:1007-9. [PMID: 477857 DOI: 10.1007/bf01949909] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A series of analogues of S-adenosyl-L-homocysteine, modified mainly in the amino acid portion of the molecule, have been synthesized. All were found to be competitive inhibitors of protein methyltransferase II from human erythrocytes. S-adenosyl-L-homocysteine remains however by far the most effective inhibitor of the methylase.
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Looze Y, Gillet L, Deconinck M, Léonis J. Inhibition of protein methyltransferases II from human erythrocytes by S-adenosyl-L-homocysteine and structurally related molecules [proceedings]. Arch Int Physiol Biochim 1979; 87:632-3. [PMID: 93463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Gillet L, Looze Y, Deconinck M, Léonis J, Gelbcke M. S-Adenosyl-L-homocysteine and structurally related molecules: synthesis and analysis of the carbon-13 nuclear magnetic resonance spectra [proceedings]. Arch Int Physiol Biochim 1979; 87:623-4. [PMID: 93457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Looze Y, Gillet L, Deconinck M, Couteaux B, Polastro E, Leonis J. Protease B from Saccharomyces cerevisiae. Purification and characterization. Int J Pept Protein Res 1979; 13:253-9. [PMID: 372109 DOI: 10.1111/j.1399-3011.1979.tb01876.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Protease B has been isolated from Saccharomyces cerevisiae and purified in six steps as follows: autolysis of the yeast cells, ammonium sulfate fractionation, activation of the proteolytic enzymes, chromatography on DEAE-cellulose, chromatography on CM-cellulose and finally, a second chromatography on DEAE-cellulose. The preparation was shown to be homogeneous on polyacrylamide gels in the absence as well as in the presence of sodium dodecylsulfate. Furthermore, the molecular weight (43,000 daltons) and the isoelectric point (5.45) were in good agreement with earlier published values. The amino acid composition is reported. The absence of disulfide bonds in protease B has to be outlined. The amino acid residues of the protein have been found to be folded nearly quantitatively (at least 80%) in a beta-conformation as deduced from a circular dichroism study. Finally, the tryptophan residues (5 mol/mol protein) are largely buried in the hydrophobic core of the enzyme.
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Couteaux B, Deconinck M, Looze Y, Gillet L, Polastro E, Léonis J. Circular dichroism and fluorescence studies of carboxypeptidase Y from Saccharomyces cerevisiae [proceedings]. Arch Int Physiol Biochim 1978; 86:933-5. [PMID: 84631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Gillet L, Looze Y, Deconinck M, Couteaux B, Polastro E, Léonis J. Purification and preliminary characterization of protease B from Saccharomyces cerevisiae [proceedings]. Arch Int Physiol Biochim 1978; 86:945-6. [PMID: 84637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Deconinck M, Couteaux B, Looze Y, Gillet L, Polastro E, Leonis J. Carboxypeptidase Y from Saccharomyces cerevisiae: circular dichroism and fluorescence studies. Experientia 1978; 34:569-70. [PMID: 350602 DOI: 10.1007/bf01936963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Carboxypeptidase Y was isolated from Saccharomyces cerevisiae and its molecular structure investigated. The enzyme in the native state possesses 40% of its amino acid residues in a beta-conformation. Its tryptophan residues seem to be largely buried in an apolar and unsymmetrical environment.
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