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Loiseau C, Requena M, Nayrac M, Mavigner M, Cazabat M, Iscache AL, Carrere N, Suc B, Alric L, Izopet J, Delobel P. Increased CXCR3+ T Cells Impairs Recruitment of T-Helper Type 17 Cells via Interferon γ and Interleukin 18 in the Small Intestine Mucosa During Treated HIV-1 Infection. J Infect Dis 2019; 220:830-840. [DOI: 10.1093/infdis/jiz123] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 03/14/2019] [Indexed: 12/14/2022] Open
Abstract
Abstract
The restoration of CD4+ T cells, especially T-helper type 17 (Th17) cells, remains incomplete in the gut mucosa of most human immunodeficiency virus type 1 (HIV-1)–infected individuals despite sustained antiretroviral therapy (ART). Herein, we report an increase in the absolute number of CXCR3+ T cells in the duodenal mucosa during ART. The frequencies of Th1 and CXCR3+ CD8+ T cells were increased and negatively correlated with CCL20 and CCL25 expression in the mucosa. In ex vivo analyses, we showed that interferon γ, the main cytokine produced by Th1 and effector CD8+ T cells, downregulates the expression of CCL20 and CCL25 by small intestine enterocytes, while it increases the expression of CXCL9/10/11, the ligands of CXCR3. Interleukin 18, a pro-Th1 cytokine produced by enterocytes, also contributes to the downregulation of CCL20 expression and increases interferon γ production by Th1 cells. This could perpetuate an amplification loop for CXCR3-driven Th1 and effector CD8+ T cells recruitment to the gut, while impairing Th17 cells homing through the CCR6-CCL20 axis in treated HIV-1–infected individuals.
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Affiliation(s)
- C Loiseau
- INSERM, UMR1043, Toulouse, France
- aPresent affiliation: Centre for Molecular Therapeutics, Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, Australia
| | - M Requena
- Laboratoire de Virologie, Toulouse, France
| | - M Nayrac
- INSERM, UMR1043, Toulouse, France
| | - M Mavigner
- Department of Pediatrics, Atlanta, Georgia
- Center for AIDS Research, Emory University School of Medicine, Atlanta, Georgia
| | - M Cazabat
- Laboratoire de Virologie, Toulouse, France
| | | | - N Carrere
- Service de Chirurgie générale et digestive, Toulouse, France
- Université Toulouse III Paul Sabatier, Toulouse, France
| | - B Suc
- Service de Chirurgie générale et digestive, Toulouse, France
- Université Toulouse III Paul Sabatier, Toulouse, France
| | - L Alric
- Service de Médecine Interne, Toulouse, France
- Université Toulouse III Paul Sabatier, Toulouse, France
- IRD UMR152, Toulouse, France
| | - J Izopet
- INSERM, UMR1043, Toulouse, France
- Laboratoire de Virologie, Toulouse, France
- Université Toulouse III Paul Sabatier, Toulouse, France
| | - P Delobel
- INSERM, UMR1043, Toulouse, France
- Service des Maladies Infectieuses et Tropicales, CHU de Toulouse, Toulouse, France
- Université Toulouse III Paul Sabatier, Toulouse, France
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Pham MQ, Iscache AL, Pham QL, Gairin JE. Cytotoxic, apoptotic, and sensitization properties ofent-kaurane-type diterpenoids fromCroton tonkinensisGagnep on human liver cancer HepG2 and Hep3b cell lines. Fundam Clin Pharmacol 2016; 30:137-46. [DOI: 10.1111/fcp.12176] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 12/16/2015] [Accepted: 12/23/2015] [Indexed: 11/27/2022]
Affiliation(s)
- Minh Quan Pham
- Faculté des Sciences Pharmaceutiques; UPS; UMR 152 Pharma-DEV; Université de Toulouse; Université Toulouse 3 35 Chemin des Maraîchers Toulouse Cedex 9 F-31062 France
- Institute of Natural Products Chemistry; Vietnam Academy of Science and Technology; Building 1H 18 Hoang Quoc Viet Hanoi Vietnam
| | - Anne Laure Iscache
- Plateau technique de cytométrie et tri cellulaire; UMR INSERM 1043-CNRS 5282- Université Toulouse 3; CHU Purpan BP3028 31024 Toulouse Cedex 3 France
| | - Quoc Long Pham
- Institute of Natural Products Chemistry; Vietnam Academy of Science and Technology; Building 1H 18 Hoang Quoc Viet Hanoi Vietnam
| | - Jean Edouard Gairin
- Faculté des Sciences Pharmaceutiques; UPS; UMR 152 Pharma-DEV; Université de Toulouse; Université Toulouse 3 35 Chemin des Maraîchers Toulouse Cedex 9 F-31062 France
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Blanchard P, Ribière M, Celle O, Lallemand P, Schurr F, Olivier V, Iscache AL, Faucon JP. Evaluation of a real-time two-step RT-PCR assay for quantitation of Chronic bee paralysis virus (CBPV) genome in experimentally-infected bee tissues and in life stages of a symptomatic colony. J Virol Methods 2007; 141:7-13. [PMID: 17166598 DOI: 10.1016/j.jviromet.2006.11.021] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2006] [Revised: 11/08/2006] [Accepted: 11/16/2006] [Indexed: 10/23/2022]
Abstract
A two-step real-time RT-PCR assay, based on TaqMan technology using a fluorescent probe (FAM-TAMRA) was developed to quantify Chronic bee paralysis virus (CBPV) genome in bee samples. Standard curves obtained from a CBPV control RNA and from a plasmid containing a partial sequence of CBPV showed that this assay provided linear detection over a 7-log range (R(2)>0.99) with a limit of detection of 100 copies, and reliable inter-assay and intra-assay reproducibility. Standardisation including RNA purification and cDNAs synthesis was also validated. The CBPV TaqMan methodology was first evaluated by quantifying the CBPV genomic load in bee samples from an experimental infection obtained by topical application. Up to 1.9 x 10(10) CBPV copies per segment of insect body (head, thorax and abdomen) were revealed whereas a lower CBPV genomic load was detected in dissected organs such as mandibular and hypopharyngeal glands, brain and alimentary canal (up to 7.2 x 10(6) CBPV copies). The CBPV genomic loads in different categories of bees from a hive presenting the trembling symptoms typical of Chronic paralysis were then quantified. Significantly higher CBPV loads were found in guard, symptomatic and dead bees (up to 1.9 x 10(13) CBPV copies) than in forager, drones and house bees (up to 3.4 x 10(6) CBPV copies). The results obtained for symptomatic or dead bees support the correlation between high CBPV genomic load and pathology expression. Moreover, the high CBPV genomic load revealed in guard bees highlights the possible pivotal role played by this category of bees in CBPV infection.
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Affiliation(s)
- Philippe Blanchard
- Agence Française de Sécurité Sanitaire des Aliments (AFSSA), Les Templiers, Route des Chappes, BP 111, 06902 Sophia Antipolis, France.
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