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Nefzi F, Lambert C, Gautheret-Dejean A, Fisson S, Khebizi Q, Khelif A, Agut H, Aouni M. Cytokine and cellular responses to human herpesvirus-6B in patients with B-acute lymphoblastic leukemia. Microbiol Immunol 2017; 60:770-777. [PMID: 27862208 DOI: 10.1111/1348-0421.12452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 10/26/2016] [Accepted: 11/06/2016] [Indexed: 01/21/2023]
Abstract
Primary infection with human herpesvirus-6 (HHV-6), is followed by its lifelong persistence in the host. Most T-cell responses to HHV-6 have been characterized using peripheral blood from healthy adults; however, the role of HHV-6 infection in immune modulation has not been elucidated for some diseases. Therefore, in this study the immune response to HHV-6 infection in patients with B-acute lymphoblastic leukemia (B-ALL) was analyzed. HHV-6 load was quantified in blood samples taken at the time of diagnosis of leukemia and on remission. The same concentrations of anti- and pro-inflammatory cytokines (IL-4, IL-1, IL-6, IL-8, IL-12p70, IL-17a, TNF-α and IFN-γ) were detected in plasma samples from 20 patients with and 20 without detectable HHV-6 virus loads in blood. Characterization of T-cell responses to HHV-6 showed low specific T-cells frequencies of 2.08% and 1.46% in patients with and without detectable viral loads, respectively. IFN-γ-producing T cells were detected in 0.03%-0.23% and in 0%-0.2% of CD4+T cells, respectively. Strong production of IL-6 was detected in medium supernatants of challenged T-cells whatever the HHV-6 status of the patients (973.51 ± 210.06 versus 825.70 ± 210.81 pg/mL). However, concentrations of TNF-α and IFN-γ were low. Thus, no association between plasma concentrations of cytokines and detection of HHV-6 in blood was identified, suggesting that HHV-6 is not strongly associated with development of B-ALL. The low viral loads detected may correspond with latently infected cells. Alternatively, HHV-6B specific immune responses may be below the detection threshold of the assays used.
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Affiliation(s)
- Faten Nefzi
- Laboratory of Transmissible Diseases and Biological Active Substances, LR99ES27, Faculty of Pharmacy, University of Monastir, Street Avicenne 5000, Monastir, Tunisia
| | - Claude Lambert
- Immunology Laboratory, Georges Friedel Laboratory (CNRS UMR5307); University Hospital of Saint-Étienne, 44 Rue Pointe Cadet, 42100 Saint-Étienne, France
| | - Agnès Gautheret-Dejean
- Sorbonne University, Pierre and Marie Curie University, Center for Immunology and Infectious Diseases of Paris (UMRS CR7), Persistent Viral Infections Team, 4 Jussieu Place, 75005, Paris, France.,Public Assistance-Hospitals of Paris, University Hospitals Pitié Salpêtrière-Charles Foix, Virology Service, 3 Avenue Victoria, 75004 Paris, France
| | - Sylvain Fisson
- INSERM U951, University of Evry Val d'Essonne, UMR_S951, Genethon, F-91002 Evry, France
| | - Quentin Khebizi
- INSERM U951, University of Evry Val d'Essonne, UMR_S951, Genethon, F-91002 Evry, France
| | - Abderrahim Khelif
- Department of Clinical Hematology, Farhat Hached Hospital, Sousse, Tunisia
| | - Henri Agut
- Sorbonne University, Pierre and Marie Curie University, Center for Immunology and Infectious Diseases of Paris (UMRS CR7), Persistent Viral Infections Team, 4 Jussieu Place, 75005, Paris, France.,Public Assistance-Hospitals of Paris, University Hospitals Pitié Salpêtrière-Charles Foix, Virology Service, 3 Avenue Victoria, 75004 Paris, France
| | - Mahjoub Aouni
- Laboratory of Transmissible Diseases and Biological Active Substances, LR99ES27, Faculty of Pharmacy, University of Monastir, Street Avicenne 5000, Monastir, Tunisia
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Ben Fredj N, Aissi M, Ben Selma W, Mahmoud I, Nefzi F, Frih-Ayed M, Boukadida J, Aouni M. Association of the IL-10 receptor A536G (S138G) loss-of-function variant with multiple sclerosis in Tunisian patients. APMIS 2017; 125:444-451. [PMID: 28225209 DOI: 10.1111/apm.12659] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 12/21/2016] [Indexed: 11/30/2022]
Abstract
Interleukin-10 (IL-10), a potent anti-inflammatory T-cell cytokine, has been shown to be a regulatory cytokine that is associated with disease remission in multiple sclerosis (MS) and exerts its activity through its cognate cell surface receptor complex, IL-10 receptor 1 (IL-10R1) and IL-10R2. The purpose of this study was to investigate the IL-10R1 S138G loss-of-function polymorphism (A536G: rs3135932) for possible influence on susceptibility and outcome of MS in Tunisian patients. A total of 103 Tunisian MS patients and 160 control subjects were studied. Genomic DNA samples were extracted from leukocytes and used to investigate S138G polymorphism in IL-10R1 gene by multiplex allele-specific polymerase chain reaction. Associations between G allele [odds ratio (OR) = 5.57; 95% confidence intervals (CI) = 3.26-9.54; p = 10-7 ], GG genotypes [OR = 10.41; 95% CI = 2.28-47.58; p = 0.0007] and AG genotype [OR = 4.14; 95% CI = 2.16-7.93; p = 0.000016] with the risk development of MS were found. In contrast, the AA genotype seemed to be associated with protection against MS [OR = 0.17; 95% CI = 0.09-0.30; p = 10-7 ]. No association was found between S138G SNP and clinical features or disease activity of MS patients. In conclusion, our results suggest that S138G loss-of-function polymorphism of the IL-10R1 may be important risk factor in increasing susceptibility to MS.
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Affiliation(s)
- Nadia Ben Fredj
- Laboratory of Transmissible Diseases and Biological Active substances, LR99-ES27, Faculty of Pharmacy, University of Monastir, Monastir, Tunisia
| | - Mouna Aissi
- Department of Neurology, Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Walid Ben Selma
- Laboratory of Microbiology and Immunology, UR02SP13, Farhat Hached University Hospital, Sousse, Tunisia
| | - Imen Mahmoud
- Department of Neurology, Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Faten Nefzi
- Laboratory of Transmissible Diseases and Biological Active substances, LR99-ES27, Faculty of Pharmacy, University of Monastir, Monastir, Tunisia
| | - Mahbouba Frih-Ayed
- Department of Neurology, Fattouma Bourguiba University Hospital, Monastir, Tunisia
| | - Jalel Boukadida
- Laboratory of Microbiology and Immunology, UR02SP13, Farhat Hached University Hospital, Sousse, Tunisia
| | - Mahjoub Aouni
- Laboratory of Transmissible Diseases and Biological Active substances, LR99-ES27, Faculty of Pharmacy, University of Monastir, Monastir, Tunisia
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Fdhila K, Haddaji N, Chakroun I, Macherki MEE, Nefzi F, Bakhrouf A. Glucomannan's protective effect on the virulence of Vibrio splendidus in pacific oyster. Fish Shellfish Immunol 2016; 56:410-416. [PMID: 27492122 DOI: 10.1016/j.fsi.2016.07.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 07/15/2016] [Accepted: 07/31/2016] [Indexed: 06/06/2023]
Abstract
We examine the effect of Glucomannan, extracted from Candida utilis yeast, on immune parameters and resistance to Vibrio splendidus of Crassostreagigas. Our results showed that Glucomannan was a successful anti-adhesive molecule; it exhibited a stronger inhibitory effect on adhesion of Vibrio splendidus in infected Crassostreagigas. Vibrio splendidus viable cells number declined after incubation with Glucomannan. Furthermore, the Glucomannan diet showed higher activity to trigger the immune response against bacteria. Glucomannan applications, in biological control of seafood associated pathogens can be an alternative solution, providing consumer with a product of good quality owing to the use of 40 non-toxic compounds. Based on our results, Glucomannan could be used as a bio-protective culture in oyster's depuration to prevent Vibrio splendidus growth.
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Affiliation(s)
- Kais Fdhila
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia
| | - Najla Haddaji
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia.
| | - Ibtissem Chakroun
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia
| | - Mohammed Ezz Eddine Macherki
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia
| | - Faten Nefzi
- Laboratory of Transmissible Diseases and Biologically Active Substances, Tunisia
| | - Amina Bakhrouf
- Laboratory of Analysis, Treatment and Valorization of Pollutants of the Environment and Products (LATVPEP), Faculty of Pharmacy, University of Monastir, Monastir 5000, Tunisia
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Nefzi F, Ben Salem NA, Khelif A, Feki S, Aouni M, Gautheret-Dejean A. Quantitative analysis of human herpesvirus-6 and human cytomegalovirus in blood and saliva from patients with acute leukemia. J Med Virol 2014; 87:451-60. [PMID: 25163462 DOI: 10.1002/jmv.24059] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2014] [Indexed: 01/24/2023]
Abstract
Human herpesvirus-6 (HHV-6) and human cytomegalovirus (HCMV) DNAs were quantified by real-time PCR assays in blood and saliva obtained from 50 patients with acute leukemia at the time of diagnosis (50 of each matrix), aplasia (65 of each matrix), remission (55 of each matrix), and relapse (20 of each matrix) to evaluate which biological matrix was more suitable to identify a viral reactivation, search for a possible link between HHV-6 and HCMV reactivations, and evaluate the relations between viral loads and count of different leukocyte types in blood. The median HHV-6 loads were 136; 219; 226, and 75 copies/million cells in blood at diagnosis, aplasia, remission and relapse, respectively. The HCMV loads were 193 and 317 copies/million cells in blood at diagnosis and remission. In the saliva samples, the HHV-6 loads were 22,165; 15,238; 30,214, and 17,454 copies/million cells at diagnosis, aplasia, remission, and relapse, respectively. The HCMV loads were 8,991; 1,461; 2,980, and 4,283 copies/million cells at diagnosis, aplasia, remission, and relapse, respectively. The HHV-6 load in the blood was correlated to the counts of polymorphonuclear leukocytes (R(2) = 0.5; P < 0.0001) and lymphocytes (R(2) = 0.4; P = 0.001) and was not correlated to the monocyte counts (R(2) = 0.07; P = 0.7). Saliva appears to be a more sensitive biological matrix than whole blood in the detection of HHV-6 or HCMV reactivations. The HHV-6 and HCMV reactivations were linked only in saliva.
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Affiliation(s)
- Faten Nefzi
- Laboratory of Infectious Diseases and Biological Agents, Faculty of Pharmacy, University of Monastir, Monastir, Tunisia
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5
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Ben Fredj N, Rizzo R, Bortolotti D, Nefzi F, Chebel S, Rotola A, Frih-Ayed M, Di Luca D, Aouni M. Evaluation of the implication of KIR2DL2 receptor in multiple sclerosis and herpesvirus susceptibility. J Neuroimmunol 2014; 271:30-5. [DOI: 10.1016/j.jneuroim.2014.03.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 02/10/2014] [Accepted: 03/24/2014] [Indexed: 01/23/2023]
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Sakly K, Lahmar R, Nefzi F, Hammami S, Harzallah O, Sakly N, Sakly W, Hassine M, Mahjoub S, Ghedira I, Feki S. Phenotypic abnormalities of peripheral blood mononuclear cells in patients with Behçet's disease and association with HLA-B51 expression. Immunol Invest 2014; 43:463-78. [PMID: 24661088 DOI: 10.3109/08820139.2014.886260] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 12/14/2022]
Abstract
The aim of this study was to investigate the subclasses and the immunophenotypic profile of peripheral mononuclear cells in patients with Behçet's disease (BD) and to assess associations between the expression of HLA-B51 antigen and that of other cell markers. Thirty healthy volunteer blood donors and forty patients with BD were enrolled into this study. Phenotyping was performed using two color flow cytometry. HLA-B51 typing was performed using the complement dependent microlymphocytotoxicity assay. Unlike controls, patients with BD presented a modified immunophenotypic profile of lymphocytes. Compared to those in the remission phase, patients with active BD showed an increased mean of MFI ratio of CD56 on CD16+CD56+ cells (32.47 ± 14.26 versus 23.87 ± 10.3; p = 0.032), increased absolute numbers of CD4(-)CD8(bright) and CD4(+)CD8(+) cells (657.1 ± 463.6 cells/µL versus 319.24 ± 116.4 cells/µL; p = 0.017 and 40.77 ± 36.41 cells/µL versus 10.77 ± 9.78 cells/µL; p < 0.0001, respectively) and an elevated mean of MFI ratio of CD19 on B cells (252.3 ± 56.7 versus 205.67 ± 32.3; p = 0.021). However, expression of HLA-B51 was not associated with any specific immunophenotypic profile. In conclusion, abnormal immunophenotypic profile of peripheral lymphocytes was found in patients with BD, especially in active phase, reflecting an immune dysregulation. Moreover, HLA-B51 expression was not found to be related to the expression of other cell markers.
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Affiliation(s)
- K Sakly
- Research Unit 03/UR/07 "Autoimmunity and Allergy", Faculty of Pharmacy, University of Monastir , Monastir , Tunisia
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Maatouk M, Sakly K, Hammami S, Boufaroua M, Nefzi F, Trimeche T, Harzallah O, Mahjoub S, Ghedira I, Feki S, Sakly N. AB0017 Hla-g 3′utr 14bp polymorphism and shla-g levels in tunisian patients with behçet’s disease. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2340] [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: 11/03/2022]
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Sakly K, Lambert C, Maatouk M, Hammami S, Sakly N, Harzallah O, Nefzi F, Mahjoub S, Ghedira I, Feki S. THU0038 Abnormal Phenotypic T Cell Subsets in Peripheral Blood of Tunisian Patients with Behcet’s Disease. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.566] [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: 11/04/2022]
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Ben-Fredj N, Ben-Selma W, Rotola A, Nefzi F, Benedetti S, Frih-Ayed M, Di Luca D, Aouni M, Caselli E. Prevalence of human herpesvirus U94/REP antibodies and DNA in Tunisian multiple sclerosis patients. J Neurovirol 2012. [PMID: 23179681 DOI: 10.1007/s13365-012-0138-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Human herpesvirus 6 (HHV-6) has been linked to the pathogenesis of multiple sclerosis (MS). Based on antibody detection and quantitative HHV-6 polymerase chain reaction assay, this study aimed to analyze the possible association between infection with HHV-6 and MS. A total of 131 serum samples were analyzed by ELISA for the presence of specific antibodies to HHV-6 latency-associated U94/REP protein: 68 serum samples from 60 MS patients (20 in relapse and 48 in remission phase) and 63 serum samples from 63 healthy controls. Real-time quantitative PCR for HHV-6 U94/rep DNA was also performed in total blood of MS patients and healthy controls. The serological analysis by ELISA showed that MS patients had increased prevalence and titers of anti-U94/REP immunoglobulins in comparison with control group (seroprevalence 51.47 % versus 28.57 % and mean titer of positive samples 1:248 versus 1:110; p=0.0005), with significant difference between relapse and remission phases. HHV-6 DNA was detected in 4 of 60 MS patients (6.66 %) and in 2 of 63 healthy controls (3.17 %), confirming previous data of prevalence obtained by qualitative nested PCR. However, viral load was higher in MS patients compared to controls, and differences were statistically significant (p=0.02). The results show that, in spite of the low presence of HHV-6 DNA in peripheral blood, MS patients have increased prevalence and titer of IgGs reacting with HHV-6 latency-associated U94/REP protein.
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Affiliation(s)
- Nadia Ben-Fredj
- Laboratory of Transmissible Diseases and Biological Active substances, LR99-ES27, Faculty of Pharmacy, University of Monastir, Avicenne street 5000, Monastir, Tunisia.
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Abid NBS, Rouis Z, Nefzi F, Souelah N, Aouni M. Evaluation of Dimethylthiazol Diphenyl Tetrazolium Bromide and Propidium Iodide Inclusion Assays for the Evaluation of Cell Viability by Flow Cytometry. ACTA ACUST UNITED AC 2012. [DOI: 10.7324/japs.2012.2525] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ben Fredj N, Rotola A, Nefzi F, Chebel S, Rizzo R, Caselli E, Frih-Ayed M, Di Luca D, Aouni M. Identification of human herpesviruses 1 to 8 in Tunisian multiple sclerosis patients and healthy blood donors. J Neurovirol 2011; 18:12-9. [PMID: 22058062 DOI: 10.1007/s13365-011-0056-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Revised: 09/19/2011] [Accepted: 09/28/2011] [Indexed: 12/20/2022]
Abstract
Members of the human Herpesviridae family are candidates for representing the macroenvironmental factors associated with multiple sclerosis (MS) pathogenesis. To verify the possible role of human herpesviruses (HHVs) as triggering or aggravating factors in relapsing-remitting multiple sclerosis clinical outcome, we studied the prevalence of all eight human herpesviruses in whole blood samples collected from 51 MS patients and from 51 healthy controls. The presence of DNA of herpes simplex virus type 1 (HSV-1) and type 2 (HSV-2), varicella zoster virus (VZV), Epstein-Barr virus (EBV), human cytomegalovirus (HCMV), human herpesvirus 6 (HHV-6), human herpesvirus 7 (HHV-7) and human herpesvirus 8 (HHV-8) was searched by specific nested polymerase chain reaction. HHVs were significantly more prevalent in the blood of MS patients than in those of the controls (P < 10(-4)). HSV-1, HSV-2, HCMV and HHV-8 were negative in both MS patients and controls samples. In MS patients, EBV, HHV-7, HHV-6 and VZV were detected in 31.3%, 33.3%, 5.8% and 7.8% of samples, respectively, compared with 3.9%, 9.8%, 1.96% and 1.96%, respectively, of samples from controls. We found a statistically significant difference only for EBV DNA and for HHV-7 DNA prevalence (P < 0.001 and P = 0.03). Although these results indicate lack of apparent association in terms of gender, type of diagnosis, symptoms, disease score and β interferon treatment between EBV or HHV-7 to MS among Tunisian patients, heterogeneity related to genetic polymorphism as well as geographical distribution of the disease and of pathogens may be of significance.
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Affiliation(s)
- Nadia Ben Fredj
- Laboratory of Transmissible Diseases and Biological Active substances, LR99-ES27, Faculty of Pharmacy, University of Monastir, Avicenne street 5000, Monastir, Tunisia.
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