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  1. Article ; Online: Reply to B. Zhao et al.

    Polley, Mei-Yin C / Gorlia, Thierry / Lassman, Andy B / van den Bent, Martin J

    Journal of clinical oncology : official journal of the American Society of Clinical Oncology

    2022  Volume 41, Issue 4, Page(s) 934–935

    Language English
    Publishing date 2022-10-03
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 604914-x
    ISSN 1527-7755 ; 0732-183X
    ISSN (online) 1527-7755
    ISSN 0732-183X
    DOI 10.1200/JCO.22.01874
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Dysregulated monocyte-derived macrophage response to Group B

    Ravi, Denho / Ntinopoulou, Erato / Guetta, Nessim / Weier, Manuela / Vogel, Verena / Spellerberg, Barbara / Sendi, Parham / Gremlich, Sandrine / Roger, Thierry / Giannoni, Eric

    Frontiers in immunology

    2023  Volume 14, Page(s) 1268804

    Abstract: Introduction: Streptococcus agalactiae: Methods: Monocytes from umbilical cord blood of healthy term newborns and from peripheral blood of healthy adult subjects were cultured with M-CSF to induce MDMs. M-CSF-MDMs, GM-CSF- and IFNγ-activated MDMs ... ...

    Abstract Introduction: Streptococcus agalactiae
    Methods: Monocytes from umbilical cord blood of healthy term newborns and from peripheral blood of healthy adult subjects were cultured with M-CSF to induce MDMs. M-CSF-MDMs, GM-CSF- and IFNγ-activated MDMs were exposed to GBS COH1, a reference strain for neonatal sepsis.
    Results: GBS induced a greater release of IL-1β, IL-6, IL-10, IL-12p70 and IL-23 in newborn compared to adult MDMs, while IL-18, IL-21, IL-22, TNF, RANTES/CCL5, MCP-1/CCL2 and IL-8/CXCL8 were released at similar levels. MDM responses to GBS were strongly influenced by conditions of activation and were distinct from those to synthetic bacterial lipopeptides and lipopolysaccharides. Under similar conditions of opsonization, newborn MDMs phagocytosed and killed GBS as efficiently as adult MDMs.
    Discussion: Altogether, the production of excessive levels of Th1- (IL-12p70), Th17-related (IL-1β, IL-6, IL-23) and anti-inflammatory (IL-10) cytokines is consistent with a dysregulated response to GBS in newborns. The high responsiveness of newborn MDMs may play a role in the progression of GBS infection in newborns, possibly contributing to the development of life-threatening organ dysfunction.
    MeSH term(s) Adult ; Infant, Newborn ; Humans ; Interleukin-10 ; Macrophage Colony-Stimulating Factor ; Interleukin-6 ; Neonatal Sepsis ; Streptococcus agalactiae ; Macrophages ; Interleukin-12 ; Interleukin-23
    Chemical Substances Interleukin-10 (130068-27-8) ; Macrophage Colony-Stimulating Factor (81627-83-0) ; Interleukin-6 ; Interleukin-12 (187348-17-0) ; Interleukin-23
    Language English
    Publishing date 2023-11-14
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2023.1268804
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Regulatory T and B cells in pediatric Henoch-Schönlein purpura: friends or foes?

    Filleron, Anne / Cezar, Renaud / Fila, Marc / Protsenko, Nastassja / Van Den Hende, Kathleen / Jeziorski, Eric / Occean, Bob / Chevallier, Thierry / Corbeau, Pierre / Tran, Tu Anh

    Arthritis research & therapy

    2024  Volume 26, Issue 1, Page(s) 52

    Abstract: ... Treg), T helper 3 (Th3), and regulatory B cell (Breg) subpopulations that might intervene ...

    Abstract Background and objectives: Henoch-Schönlein purpura (HSP) is the most common immunoglobulin A-mediated systemic vasculitis in childhood. We studied immune dysregulation in HSP by analyzing regulatory T (Treg), T helper 3 (Th3), and regulatory B cell (Breg) subpopulations that might intervene in immune activation, IgA production, and HSP clinical manifestations.
    Methods: This prospective study included 3 groups of children: 30 HSP on acute phase, 30 HSP on remission, and 40 healthy controls (HCs) matched on age. Treg, Breg, and Th3 were analyzed by flow cytometry. Serum immunoglobulin and cytokine levels were quantified by ELISA and Luminex.
    Results: Treg frequencies were higher in acute HSP than in remitting HSP and HCs (6.53% [4.24; 9.21] vs. 4.33% [3.6; 5.66], p = 0.002, and vs. 4.45% [3.01; 6.6], p = 0.003, respectively). Activated Th3 cells (FoxP3 + Th3 cells) tend to be more abundant in HSP than in HCs (78.43% [50.62; 80.84] vs. 43.30% [40.20; 49.32], p = 0.135). Serum IgA, IL-17, and latency-associated peptide (a marker of the anti-inflammatory cytokine TGF-beta production) were significantly and inflammatory cytokines TNF-alpha, IL-1-beta, and IL-6 were non-significantly higher in HSP than HCs. Bregs were identical between the groups, but, in patients with renal impairment, Breg percentage was lower compared to those without. Treg removal in PBMC culture resulted in an increase in IgA production in HSP proving a negative regulatory role of Tregs on IgA production.
    Conclusions: In pediatric HSP, immune activation persists in spite of an increase in Th3 and Tregs. Th3 could be involved in IgA hyperproduction, inefficiently downregulated by Tregs. Lack of Bregs appears linked to renal impairment.
    MeSH term(s) Child ; Humans ; IgA Vasculitis ; Leukocytes, Mononuclear ; Prospective Studies ; Cytokines ; Immunoglobulin A
    Chemical Substances Cytokines ; Immunoglobulin A
    Language English
    Publishing date 2024-02-16
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2107602-9
    ISSN 1478-6362 ; 1478-6354
    ISSN (online) 1478-6362
    ISSN 1478-6354
    DOI 10.1186/s13075-024-03278-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Hepatitis B Delta: assessment of the knowledge and practices of hepato-gastroenterologists practicing in non-academic settings in France.

    Cadranel, Jean-François D / Zougmoré, Honoré T / Efole, Jean-René Ngele / Hanslik, Bertrand / Causse, Xavier / Rosa, Isabelle / Lemaitre, Caroline / Mokhtari, Camélia / Baron, Aurore / Thevenot, Thierry / Medmoun, Mourad / Smadhi, Ryad / Fantognon, Gildas / Remy, André J / Macaigne, Gilles / Arondel, Yves / Arpurt, Jean-Pierre / Bellaiche, Guy / Bourlière, Marc /
    De Kerguenec, Caroline / Heluwaert, Frédéric / Verlynde, Juliette / Halfon, Philippe / Roulot, Dominique / Carrier, Paul / Loustaud-Ratti, Véronique / Lemagoarou, Tristan

    European journal of gastroenterology & hepatology

    2024  Volume 36, Issue 6, Page(s) 735–741

    Abstract: Background: Data on the management of Hepatitis B-Delta (HB-D) by hepatogastroenterologists (HGs ...

    Abstract Background: Data on the management of Hepatitis B-Delta (HB-D) by hepatogastroenterologists (HGs) practicing in nonacademic hospitals or private practices are unknown in France.
    Objective: We aimed to evaluate the knowledge and practices of HGs practicing in nonacademic settings regarding HB-D.
    Methods: A Google form document was sent to those HGs from May to September 2021.
    Results: A total of 130 HGs (mean age, 45 years) have participated in this survey. Among HBsAg-positive patients, Delta infection was sought in only 89% of cases. Liver fibrosis was assessed using FibroScan in 77% of the cases and by liver biopsy in 81% of the cases. A treatment was proposed for patients with >F2 liver fibrosis in 49% of the cases regardless of transaminase levels and for all the patients by 39% of HGs. Responding HGs proposed a treatment using pegylated interferon in 50% of cases, bulevirtide in 45% of cases and a combination of pegylated interferon and bulevirtide in 40.5% of cases. Among the criteria to evaluate the treatment efficacy, a decrease or a normalization of transaminases was retained by 89% of responding HGs, a reduction of liver fibrosis score for 70% of them, an undetectable delta RNA and HBsAg for 55% of them and a 2 log 10 decline in delta viremia for 62% of the cases.
    Conclusion: Hepatitis Delta screening was not systematically performed in HBsAg-positive patients despite the probable awareness and knowledge of the few responders who were able to prescribe treatments of hepatitis delta.
    MeSH term(s) Humans ; France ; Middle Aged ; Female ; Male ; Antiviral Agents/therapeutic use ; Practice Patterns, Physicians'/statistics & numerical data ; Gastroenterology ; Gastroenterologists ; Liver Cirrhosis/virology ; Adult ; Health Knowledge, Attitudes, Practice ; Hepatitis Delta Virus/isolation & purification ; Hepatitis Delta Virus/genetics ; Biopsy ; Hepatitis B Surface Antigens/blood
    Chemical Substances Antiviral Agents ; Hepatitis B Surface Antigens
    Language English
    Publishing date 2024-04-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 1034239-4
    ISSN 1473-5687 ; 0954-691X
    ISSN (online) 1473-5687
    ISSN 0954-691X
    DOI 10.1097/MEG.0000000000002707
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: The aminopeptidase B (Ap-B) is phosphorylated in HEK293 cells.

    Adicéam, Emilie / Devakumaran, Sarujan / Cadel, Sandrine / Foulon, Thierry / Ghelis, Thanos

    Biochimie

    2022  Volume 201, Page(s) 204–212

    Abstract: ... phosphorylation. Aminopeptidase B (Ap-B), a M1 metallopeptidase, hydrolyses the peptide bond on the carbonyl side ...

    Abstract Proteolysis is a post-translational modification (PTM) that affects the whole proteome. First regarded as only destructive, it is more precise than expected. It is finely regulated by other PTMs like phosphorylation. Aminopeptidase B (Ap-B), a M1 metallopeptidase, hydrolyses the peptide bond on the carbonyl side of basic residues at the NH
    MeSH term(s) Alkaline Phosphatase/metabolism ; Aminopeptidases/chemistry ; Diamond/metabolism ; HEK293 Cells ; Humans ; Peptides/chemistry ; Phosphorylation ; Protein Processing, Post-Translational ; Proteome/metabolism
    Chemical Substances Peptides ; Proteome ; Diamond (7782-40-3) ; Alkaline Phosphatase (EC 3.1.3.1) ; Aminopeptidases (EC 3.4.11.-) ; aminopeptidase B (EC 3.4.11.6)
    Language English
    Publishing date 2022-08-08
    Publishing country France
    Document type Journal Article
    ZDB-ID 120345-9
    ISSN 1638-6183 ; 0300-9084
    ISSN (online) 1638-6183
    ISSN 0300-9084
    DOI 10.1016/j.biochi.2022.07.010
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Degradation of aflatoxin B

    Liu, Yingli / Mao, Huijia / Woldemariam Yohannes, Kalekristos / Wan, Zhen / Cao, Yating / Tron, Thierry / Lin, Junfang / Jiang, Yixuan / Li, Hongyan / Wang, Jing

    Food research international (Ottawa, Ont.)

    2021  Volume 145, Page(s) 110418

    Abstract: Aflatoxin B ...

    Abstract Aflatoxin B
    MeSH term(s) Aflatoxin B1 ; Chromatography, High Pressure Liquid ; Chromatography, Liquid ; Humans ; Laccase ; Saccharomyces cerevisiae ; Tandem Mass Spectrometry ; Trametes
    Chemical Substances Aflatoxin B1 (9N2N2Y55MH) ; Laccase (EC 1.10.3.2)
    Language English
    Publishing date 2021-05-19
    Publishing country Canada
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1111695-x
    ISSN 1873-7145 ; 0963-9969
    ISSN (online) 1873-7145
    ISSN 0963-9969
    DOI 10.1016/j.foodres.2021.110418
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  7. Article ; Online: Transcriptomic Analysis of Livers of Inactive Carriers of Hepatitis B Virus With Distinct Expression of Hepatitis B Surface Antigen.

    Rico Montanari, Noe / Ramirez, Ricardo / Van Buuren, Nick / van den Bosch, Thierry P P / Doukas, Michail / Debes, Jose D / Feierbach, Becket / Boonstra, Andre

    The Journal of infectious diseases

    2021  Volume 225, Issue 6, Page(s) 1081–1090

    Abstract: Inactive carrier phases in chronic hepatitis B virus (HBV) infection present minimal liver disease ... responsible remain elusive. Moreover, hepatitis B surface antigen (HBsAg) production-hypothesized to modulate ...

    Abstract Inactive carrier phases in chronic hepatitis B virus (HBV) infection present minimal liver disease and HBV replication activity suggesting partial immune reconstitution, although the mechanisms responsible remain elusive. Moreover, hepatitis B surface antigen (HBsAg) production-hypothesized to modulate the immune response-is unaltered. In the current study, we assessed the intrahepatic transcriptome in inactive carriers of HBV versus healthy liver donors, including in the context of diverse HBsAg levels (serum and liver), to better understand the phenomenon of immune control. We found a deregulated liver transcriptome in inactive carriers compared with healthy controls, despite normal liver function. Moreover, diverse HBsAg levels have minimal impact on the liver transcriptome in inactive carriers, although gene correlation analysis revealed that leukocyte activation, recruitment, and innate responses genes were correlated with liver HBsAg levels. These findings provide more insight into the mechanisms underlying anti-HBV strategies currently under development, aimed at interfering with HBsAg production or inducing a state of immune control.
    MeSH term(s) Carrier State ; DNA, Viral ; Hepatitis B/genetics ; Hepatitis B Surface Antigens/genetics ; Hepatitis B virus/genetics ; Hepatitis B, Chronic ; Humans ; Liver ; Transcriptome
    Chemical Substances DNA, Viral ; Hepatitis B Surface Antigens
    Language English
    Publishing date 2021-07-16
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3019-3
    ISSN 1537-6613 ; 0022-1899
    ISSN (online) 1537-6613
    ISSN 0022-1899
    DOI 10.1093/infdis/jiab381
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  8. Article: Subclinical proximal tubulopathy in hepatitis B: The roles of nucleot(s)ide analogue treatment and the hepatitis B virus.

    Brayette, Anaïs / Essig, Marie / Carrier, Paul / Debette-Gratien, Marilyne / Labrunie, Anaïs / Alain, Sophie / Maynard, Marianne / Ganne-Carrié, Nathalie / Nguyen-Khac, Eric / Pinet, Pauline / De Ledinghen, Victor / Renou, Christophe / Mathurin, Philippe / Vanlemmens, Claire / Di Martino, Vincent / Gervais, Anne / Foucher, Juliette / Isabelle, Fouchard-Hubert / Vergniol, Julien /
    Hourmand-Ollivier, Isabelle / Cohen, Daniel / Duval, Xavier / Poynard, Thierry / Bardou, Marc / Abergel, Armand / Dao, Manh-Thong / Thévenot, Thierry / Hiriart, Jean-Baptiste / Canva, Valérie / Lassailly, Guillaume / Aurières, Christine / Boyer, Nathalie / Thabut, Dominique / Bernard, Pierre-Henri / Schnee, Matthieu / Larrey, Dominique / Hanslik, Bertrand / Hommel, Séverine / Jacques, Jérémie / Loustaud-Ratti, Véronique

    World journal of hepatology

    2021  Volume 12, Issue 12, Page(s) 1326–1340

    Abstract: Background: The recommended monitoring tools for evaluating nucleot(s)ide analogue renal toxicity, such as estimated glomerular filtration rate (eGFR) and phosphatemia, are late markers of proximal tubulopathy. Multiple early markers are available, but ... ...

    Abstract Background: The recommended monitoring tools for evaluating nucleot(s)ide analogue renal toxicity, such as estimated glomerular filtration rate (eGFR) and phosphatemia, are late markers of proximal tubulopathy. Multiple early markers are available, but no consensus exists on their use.
    Aim: To determine the 24 mo prevalence of subclinical proximal tubulopathy (SPT), as defined with early biomarkers, in treated
    Methods: A prospective, non-randomized, multicenter study of HBV-monoinfected patients with a low number of renal comorbidities was conducted. The patients were separated into three groups: Naïve, starting entecavir (ETV) treatment, or starting tenofovir disoproxil (TDF) treatment. Data on the early markers of SPT, the eGFR and phosphatemia, were collected quarterly. SPT was defined as a maximal tubular reabsorption of phosphate/eGFR below 0.8 mmoL/L and/or uric acid fractional excretion above 10%. The prevalence and cumulative incidence of SPT at month 24 (M24) were calculated. Quantitative data were analyzed using analyses of variance or Kruskal-Wallis tests, whereas chi-squared or Fisher's exact tests were used to analyze qualitative data. Multivariate analyses were used to adjust for any potential confounding factors.
    Results: Of the 196 patients analyzed, 138 (84 naïve, 28 starting ETV, and 26 starting TDF) had no SPT at inclusion. At M24, the prevalence of SPT was not statistically different between naïve and either treated group (21.1%
    Conclusion: The prevalence and incidence of SPT was higher in TDF-treated patients compared to naïve patients. SPT in the naïve population suggests that HBV can induce renal tubular toxicity.
    Language English
    Publishing date 2021-01-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2573703-X
    ISSN 1948-5182
    ISSN 1948-5182
    DOI 10.4254/wjh.v12.i12.1326
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  9. Article ; Online: Normal B cells express ZAP70 in chronic lymphocytic leukemia: A link between autoimmunity and lymphoproliferation?

    Ghergus, Dana / Martin, Mickaël / Knapp, Anne-Marie / Delmotte, Fabien / Joublin-Delavat, Aurélie / Jung, Sophie / Schickel, Jean-Nicolas / Mendel, Isabelle / Dupuis, Arnaud / Drénou, Bernard / Ghesquières, Hervé / Salles, Gilles / Baseggio, Lucile / Herbrecht, Raoul / Korganow, Anne-Sophie / Vallat, Laurent / Soulas-Sprauel, Pauline / Meffre, Eric / Martin, Thierry

    American journal of hematology

    2023  Volume 99, Issue 1, Page(s) 48–56

    Abstract: ZAP70 has a prognostic value in chronic lymphocytic leukemia (CLL), through altered B-cell receptor ... B cells, and this phenomenon is poorly understood. Here, we show, using flow cytometry, that a substantial ... percentage of CD5- nonmalignant B cells from CLL patients expresses ZAP70 compared with CD5- B ...

    Abstract ZAP70 has a prognostic value in chronic lymphocytic leukemia (CLL), through altered B-cell receptor signaling, which is important in CLL pathogenesis. A good correlation between ZAP70 expression in CLL cells and the occurrence of autoimmune phenomena has been reported. Yet, the great majority of CLL-associated autoimmune cytopenia is due to polyclonal immunoglobulin (Ig) G synthesized by nonmalignant B cells, and this phenomenon is poorly understood. Here, we show, using flow cytometry, that a substantial percentage of CD5- nonmalignant B cells from CLL patients expresses ZAP70 compared with CD5- B cells from healthy subjects. This ZAP70 expression in normal B cells from CLL patients was also evidenced by the detection of ZAP70 mRNA at single-cell level with polyclonal Ig heavy- and light-chain gene transcripts. ZAP70+ normal B cells belong to various B-cell subsets and their presence in the naïve B-cell subset suggests that ZAP70 expression may occur during early B-cell development in CLL patients and potentially before malignant transformation. The presence of ZAP70+ normal B cells is associated with autoimmune cytopenia in CLL patients in our cohort of patients, and recombinant antibodies produced from these ZAP70+ nonmalignant B cells were frequently autoreactive including anti-platelet reactivity. These results provide a better understanding of the implication of ZAP70 in CLL leukemogenesis and the mechanisms of autoimmune complications of CLL.
    MeSH term(s) Humans ; Leukemia, Lymphocytic, Chronic, B-Cell ; Autoimmunity ; B-Lymphocytes ; Flow Cytometry ; Prognosis ; ZAP-70 Protein-Tyrosine Kinase/genetics ; ZAP-70 Protein-Tyrosine Kinase/metabolism
    Chemical Substances ZAP70 protein, human (EC 2.7.10.2) ; ZAP-70 Protein-Tyrosine Kinase (EC 2.7.10.2)
    Language English
    Publishing date 2023-10-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 196767-8
    ISSN 1096-8652 ; 0361-8609
    ISSN (online) 1096-8652
    ISSN 0361-8609
    DOI 10.1002/ajh.27137
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  10. Article ; Online: Case Report: Late Reactivation of Herpes B Virus After a Monkey Bite: A Case of Severe Meningoencephalitis.

    Ponzetto, Ester / Delhez, Quentin / Hoppenbrouwers, Maarten / De Schryver, Nicolas / Serck, Nicolas / Dugernier, Thierry / Duray, Marie-Céline / Gressens, Benjamin / Vinetti, Marco / Sips, Gregorius J / van Kampen, Jeroen / GeurtsvanKessel, Corine H / van Boheemen, Sander

    The American journal of tropical medicine and hygiene

    2023  Volume 109, Issue 6, Page(s) 1277–1281

    Abstract: Macacine alphaherpesvirus 1, also known as herpes B virus (BV), is an alphaherpesvirus endemic ...

    Abstract Macacine alphaherpesvirus 1, also known as herpes B virus (BV), is an alphaherpesvirus endemic to several macaque species, capable of causing zoonotic infections in humans, with high mortality rates. Evidence of reactivation in humans has rarely been reported. Here we depict a case of BV reactivation after 54 years, leading to severe meningoencephalitis. This case supports the use of antiviral prophylaxis in patients surviving a confirmed BV central nervous system infection. We sequenced DNA from BV obtained from the patient's cerebrospinal fluid. Phylogenetic analysis showed significant divergence in the clustering of this particular BV strain compared with other known BVs. Therefore, additional efforts are needed to obtain a broader sequence landscape from BVs circulating in monkeys.
    MeSH term(s) Animals ; Humans ; Herpesvirus 1, Cercopithecine/genetics ; Macaca ; Meningoencephalitis/complications ; Phylogeny ; Zoonoses ; Female ; Aged
    Language English
    Publishing date 2023-10-16
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2942-7
    ISSN 1476-1645 ; 0002-9637
    ISSN (online) 1476-1645
    ISSN 0002-9637
    DOI 10.4269/ajtmh.23-0253
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