1
|
Bekkat F, Seradj M, Lengagne R, Fiore F, Kato M, Lucas B, Castellano F, Molinier-Frenkel V, Richard Y, Prévost-Blondel A. Upregulation of IL4-induced gene 1 enzyme by B2 cells during melanoma progression impairs their antitumor properties. Eur J Immunol 2024; 54:e2350615. [PMID: 38400692 DOI: 10.1002/eji.202350615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 01/17/2024] [Accepted: 01/27/2024] [Indexed: 02/25/2024]
Abstract
B cells present in human cutaneous melanoma have been associated with protective or detrimental effects on disease progression according to their phenotype. By using the RET model of spontaneous melanoma and adoptive transfer of B16 melanoma cells, we show that immature and follicular B2 (B2-FO) cells exert a protective effect on melanoma progression by promoting the generation of effector memory T cells and limiting the recruitment of polymorphonuclear myeloid-derived suppressor cells. Unfortunately, this beneficial effect progressively wanes as a consequence of enhanced expression of the IL4-induced gene 1 (IL4I1) enzyme by immature B cells and B2-FO cells. Endogenous IL4I1 selectively decreases CXCR5 expression in splenic immature B cells, subverting their trafficking to primary tumors and enhancing the production of IL-10 by B2 cells, thereby promoting an immunosuppressive microenvironment. Accordingly, B2 cells from RET IL4I1KO mice more efficiently controlled B16 melanoma growth than B2 cells from IL4I1-competent RET mice. Collectively, immature B cells and B2-FO cells are key actors in the control of melanoma growth, but their mobility and functions are differently impaired by IL4I1 overexpression during melanoma progression. Thus, our present data strongly urge us to associate an IL4I1 antagonist with current immunotherapy to improve the treatment of metastatic melanoma.
Collapse
Affiliation(s)
- Fériel Bekkat
- Université Paris Cité, CNRS UMR 8104, INSERM U1016, Institut Cochin, Paris, France
| | - Malvina Seradj
- Université Paris Cité, CNRS UMR 8104, INSERM U1016, Institut Cochin, Paris, France
| | - Renée Lengagne
- Université Paris Cité, CNRS UMR 8104, INSERM U1016, Institut Cochin, Paris, France
| | - Frédéric Fiore
- Centre d'Immunophénomique (CIPHE), Aix Marseille Université, INSERM, CNRS, CELPHEDIA, PHENOMIN, Marseille, France
| | - Masashi Kato
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Bruno Lucas
- Université Paris Cité, CNRS UMR 8104, INSERM U1016, Institut Cochin, Paris, France
| | - Flavia Castellano
- Université Paris Est Créteil, INSERM, IMRB, Créteil, France
- AP-HP, Hôpital Henri Mondor, Département d'Hématologie-Immunologie, Créteil, France
| | - Valérie Molinier-Frenkel
- Université Paris Est Créteil, INSERM, IMRB, Créteil, France
- AP-HP, Hôpital Henri Mondor, Département d'Hématologie-Immunologie, Créteil, France
| | - Yolande Richard
- Université Paris Cité, CNRS UMR 8104, INSERM U1016, Institut Cochin, Paris, France
| | | |
Collapse
|
2
|
Faure-Dupuy S, Jubrail J, Depierre M, Africano-Gomez K, Öberg L, Israelsson E, Thörn K, Delevoye C, Castellano F, Herit F, Guilbert T, Russell DG, Mayer G, Cunoosamy DM, Kurian N, Niedergang F. ARL5b inhibits human rhinovirus 16 propagation and impairs macrophage-mediated bacterial clearance. EMBO Rep 2024; 25:1156-1175. [PMID: 38332148 PMCID: PMC10933434 DOI: 10.1038/s44319-024-00069-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 12/21/2023] [Accepted: 01/03/2024] [Indexed: 02/10/2024] Open
Abstract
Human rhinovirus is the most frequently isolated virus during severe exacerbations of chronic respiratory diseases, like chronic obstructive pulmonary disease. In this disease, alveolar macrophages display significantly diminished phagocytic functions that could be associated with bacterial superinfections. However, how human rhinovirus affects the functions of macrophages is largely unknown. Macrophages treated with HRV16 demonstrate deficient bacteria-killing activity, impaired phagolysosome biogenesis, and altered intracellular compartments. Using RNA sequencing, we identify the small GTPase ARL5b to be upregulated by the virus in primary human macrophages. Importantly, depletion of ARL5b rescues bacterial clearance and localization of endosomal markers in macrophages upon HRV16 exposure. In permissive cells, depletion of ARL5b increases the secretion of HRV16 virions. Thus, we identify ARL5b as a novel regulator of intracellular trafficking dynamics and phagolysosomal biogenesis in macrophages and as a restriction factor of HRV16 in permissive cells.
Collapse
Affiliation(s)
| | - Jamil Jubrail
- Université Paris Cité, CNRS, Inserm, Institut Cochin, Paris, 75014, France
- Southampton Solent University, East Park Terrace, Southampton, SO14 0YN, UK
| | - Manon Depierre
- Université Paris Cité, CNRS, Inserm, Institut Cochin, Paris, 75014, France
| | | | - Lisa Öberg
- Translational Science & Experimental Medicine, Research & Early Development, Respiratory and Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, 413 14, Sweden
| | - Elisabeth Israelsson
- Translational Science & Experimental Medicine, Research & Early Development, Respiratory and Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, 413 14, Sweden
| | - Kristofer Thörn
- Translational Science & Experimental Medicine, Research & Early Development, Respiratory and Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, 413 14, Sweden
| | - Cédric Delevoye
- Institut Curie, Université PSL, CNRS, UMR144, Structure and Membrane Compartments, Paris, France
- Institut Curie, Université PSL, CNRS, UMR144, Cell and Tissue Imaging Facility (PICT-IBiSA), Paris, France
| | - Flavia Castellano
- Université Paris Cité, CNRS, Inserm, Institut Cochin, Paris, 75014, France
- Université Paris Est Creteil, INSERM, IMRB, Creteil, 94010, France
| | - Floriane Herit
- Université Paris Cité, CNRS, Inserm, Institut Cochin, Paris, 75014, France
| | - Thomas Guilbert
- Université Paris Cité, CNRS, Inserm, Institut Cochin, Paris, 75014, France
| | - David G Russell
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, 14853, USA
| | - Gaell Mayer
- Immunology, Late stage Development, Respiratory and Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, 413 14, Sweden
| | - Danen M Cunoosamy
- Research & Early Development, Respiratory and Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, 413 14, Sweden
| | - Nisha Kurian
- Research & Early Development, Respiratory and Immunology, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, 413 14, Sweden
| | | |
Collapse
|
3
|
Gatineau J, Nidercorne C, Dupont A, Puiffe ML, Cohen JL, Molinier-Frenkel V, Niedergang F, Castellano F. IL4I1 binds to TMPRSS13 and competes with SARS-CoV-2 spike. Front Immunol 2022; 13:982839. [PMID: 36131918 PMCID: PMC9483092 DOI: 10.3389/fimmu.2022.982839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/09/2022] [Indexed: 11/26/2022] Open
Abstract
The secreted enzyme interleukin four-induced gene 1 (IL4I1) is involved in the negative control of the adaptive immune response. IL4I1 expression in human cancer is frequent and correlates with poor survival and resistance to immunotherapy. Nevertheless, its mechanism of action remains partially unknown. Here, we identified transmembrane serine protease 13 (TMPRSS13) as an immune cell-expressed surface protein that binds IL4I1. TMPRSS13 is a paralog of TMPRSS2, of which the protease activity participates in the cleavage of SARS-CoV-2 spike protein and facilitates virus induced-membrane fusion. We show that TMPRSS13 is expressed by human lymphocytes, monocytes and monocyte-derived macrophages, can cleave the spike protein and allow SARS-CoV-2 spike pseudotyped virus entry into cells. We identify regions of homology between IL4I1 and spike and demonstrate competition between the two proteins for TMPRSS13 binding. These findings may be relevant for both interfering with SARS-CoV-2 infection and limiting IL4I1-dependent immunosuppressive activity in cancer.
Collapse
Affiliation(s)
| | | | | | | | - José L. Cohen
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
- AP-HP, Hopital H Mondor, CIC Biotherapies, Créteil, France
| | - Valérie Molinier-Frenkel
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
- AP-HP, Hopital Henri Mondor, Departement d’Hematologie-Immunologie, Créteil, France
- *Correspondence: Flavia Castellano, ; Florence Niedergang, ; Valérie Molinier-Frenkel,
| | - Florence Niedergang
- Université Paris Cité, CNRS, INSERM, Institut Cochin, CNRS, Paris, France
- *Correspondence: Flavia Castellano, ; Florence Niedergang, ; Valérie Molinier-Frenkel,
| | - Flavia Castellano
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France
- AP-HP, Hopital Henri Mondor, Plateforme des Ressources Biologiques, Créteil, France
- *Correspondence: Flavia Castellano, ; Florence Niedergang, ; Valérie Molinier-Frenkel,
| |
Collapse
|
4
|
De Saint-Hubert M, Castellano F, Crijns W, Kodaira S, Swakoń J, Leblans P, Verellen D, Goossens J, Akselrod M, de Freitas Nascimento L. Promises of film dosimetry based on radiophotoluminescence imaging in radiotherapy including charged particle beams. Phys Med 2021. [DOI: 10.1016/s1120-1797(22)00030-8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
5
|
Abstract
The amino-acid catabolizing enzyme Interleukin-4 induced gene 1 (IL4I1) remains poorly characterized despite it is emerging as a pertinent therapeutic target for cancer. IL4I1 is secreted in the synaptic cleft by antigen-presenting cells. It inhibits TCR signaling, modulates naïve T cell differentiation and limits effector T cell proliferation. IL4I1 expression in tumors shapes the tumor microenvironment and impairs the antitumor cytotoxic T cell response, thereby facilitating cancer immune escape. Several mechanisms participate in these effects. Recent data suggest a role of new IL4I1 metabolites in activation of the aryl-hydrocarbon receptor (AHR). Here, we observe that expression of IL4I1 is poorly correlated with that of validated targets of AHR in human cancers. Moreover, dendritic cells do not upregulate AHR target genes in relation with IL4I1 expression in vivo. Finally, IL4I1 activity toward tryptophan leading to production of AHR-activating products is very low, and should be negligible when tryptophan-degrading enzymes of higher affinity compete for the substrate. We recently showed that IL4I1 expression by dendritic cells directly regulates immune synapse formation and modulates the repertoire and memory differentiation of responding CD8 T cells after viral infection. Thus, IL4I1 may restrain tumor control through regulating the priming of tumor-specific CD8 T cells, independently of AHR activation.
Collapse
Affiliation(s)
- Flavia Castellano
- INSERM, IMRB, Univ Paris Est Creteil, Creteil, France.,Departement d'Hematologie-Immunologie, AP-HP, Hopital Henri Mondor, Créteil, France
| | | | - José L Cohen
- INSERM, IMRB, Univ Paris Est Creteil, Creteil, France.,Centre d'investigation Clinique en Biothérapie, AP-HP, Hopital Henri Mondor, Créteil, France
| | - Valérie Molinier-Frenkel
- INSERM, IMRB, Univ Paris Est Creteil, Creteil, France.,Departement d'Hematologie-Immunologie, AP-HP, Hopital Henri Mondor, Créteil, France
| |
Collapse
|
6
|
Castellano F, Correale J, Molinier-Frenkel V. Editorial: Immunosuppressive Amino Acid Catabolizing Enzymes in Heallth and Disease. Front Immunol 2021; 12:689864. [PMID: 34025686 PMCID: PMC8131503 DOI: 10.3389/fimmu.2021.689864] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 04/20/2021] [Indexed: 01/02/2023] Open
Affiliation(s)
- Flavia Castellano
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,AP-HP, Hopital Henri Mondor, Departement de Biologie-Pathologie, Creteil, France
| | - Jorge Correale
- AP-HP, Hopital Henri Mondor, Departement de Biologie-Pathologie, Creteil, France
| | - Valérie Molinier-Frenkel
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,AP-HP, Hopital Henri Mondor, Departement de Biologie-Pathologie, Creteil, France
| |
Collapse
|
7
|
Castellano F, Molinier-Frenkel V. Control of T-Cell Activation and Signaling by Amino-Acid Catabolizing Enzymes. Front Cell Dev Biol 2020; 8:613416. [PMID: 33392202 PMCID: PMC7773816 DOI: 10.3389/fcell.2020.613416] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 11/30/2020] [Indexed: 12/12/2022] Open
Abstract
Amino acids are essential for protein synthesis, epigenetic modification through the methylation of histones, and the maintenance of a controlled balance of oxidoreduction via the production of glutathione and are precursors of certain neurotransmitters. T lymphocytes are particularly sensitive to fluctuations in amino acid levels. During evolution, the production of amino-acid catabolizing enzymes by mainly antigen-presenting cells has become a physiological mechanism to control T-cell activation and polarization. The action of these enzymes interferes with TCR and co-stimulation signaling, allowing tuning of the T-cell response. These capacities can be altered in certain pathological conditions, with relevant consequences for the development of disease.
Collapse
Affiliation(s)
- Flavia Castellano
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,AP-HP, Hopital Henri Mondor, Departement Immunologie-Hématologie, Creteil, France
| | - Valérie Molinier-Frenkel
- Univ Paris Est Creteil, INSERM, IMRB, Creteil, France.,AP-HP, Hopital Henri Mondor, Departement Immunologie-Hématologie, Creteil, France
| |
Collapse
|
8
|
Puiffe ML, Dupont A, Sako N, Gatineau J, Cohen JL, Mestivier D, Lebon A, Prévost-Blondel A, Castellano F, Molinier-Frenkel V. IL4I1 Accelerates the Expansion of Effector CD8 + T Cells at the Expense of Memory Precursors by Increasing the Threshold of T-Cell Activation. Front Immunol 2020; 11:600012. [PMID: 33343572 PMCID: PMC7746639 DOI: 10.3389/fimmu.2020.600012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 11/03/2020] [Indexed: 12/25/2022] Open
Abstract
IL4I1 is an immunoregulatory enzyme that inhibits CD8 T-cell proliferation in vitro and in the tumoral context. Here, we dissected the effect of IL4I1 on CD8 T-cell priming by studying the differentiation of a transgenic CD8 T-cell clone and the endogenous repertoire in a mouse model of acute lymphocytic choriomeningitis virus (LCMV) infection. Unexpectedly, we show that IL4I1 accelerates the expansion of functional effector CD8 T cells during the first several days after infection and increases the average affinity of the elicited repertoire, supporting more efficient LCMV clearance in WT mice than IL4I1-deficient mice. Conversely, IL4I1 restrains the differentiation of CD8 T-cells into long-lived memory precursors and favors the memory response to the most immunodominant peptides. IL4I1 expression does not affect the phenotype or antigen-presenting functions of dendritic cells (DCs), but directly reduces the stability of T-DC immune synapses in vitro, thus dampening T-cell activation. Overall, our results support a model in which IL4I1 increases the threshold of T-cell activation, indirectly promoting the priming of high-affinity clones while limiting memory T-cell differentiation.
Collapse
Affiliation(s)
- Marie-Line Puiffe
- Virus-Immunity-Cancer Department, Institut Mondor de Recherche Biomédicale (IMRB), INSERM U955, Université Paris-Est Créteil, Créteil, France
| | - Aurélie Dupont
- Virus-Immunity-Cancer Department, Institut Mondor de Recherche Biomédicale (IMRB), INSERM U955, Université Paris-Est Créteil, Créteil, France
| | - Nouhoum Sako
- Virus-Immunity-Cancer Department, Institut Mondor de Recherche Biomédicale (IMRB), INSERM U955, Université Paris-Est Créteil, Créteil, France
| | - Jérôme Gatineau
- Virus-Immunity-Cancer Department, Institut Mondor de Recherche Biomédicale (IMRB), INSERM U955, Université Paris-Est Créteil, Créteil, France
| | - José L Cohen
- Virus-Immunity-Cancer Department, Institut Mondor de Recherche Biomédicale (IMRB), INSERM U955, Université Paris-Est Créteil, Créteil, France
| | - Denis Mestivier
- Bioinformatics Core Laboratory, Institut Mondor de Recherche Biomédicale (IMRB), INSERM U955, Université Paris-Est Créteil, Créteil, France
| | - Agnès Lebon
- INSERM U1016, CNRS UMR8104, Institut Cochin, Université de Paris, Paris, France
| | | | - Flavia Castellano
- Virus-Immunity-Cancer Department, Institut Mondor de Recherche Biomédicale (IMRB), INSERM U955, Université Paris-Est Créteil, Créteil, France.,Pathobiology Department, Groupe Hospitalo-Universitaire Chenevier-Mondor, AP-HP, Créteil, France
| | - Valérie Molinier-Frenkel
- Virus-Immunity-Cancer Department, Institut Mondor de Recherche Biomédicale (IMRB), INSERM U955, Université Paris-Est Créteil, Créteil, France.,Pathobiology Department, Groupe Hospitalo-Universitaire Chenevier-Mondor, AP-HP, Créteil, France
| |
Collapse
|
9
|
Di Lisi D, Lupo A, Castellano F, Nugara C, Triolo OF, Evola G, Trapani R, Novo S, Novo G. P776 Stress ecocardiography and speckle tracking analysis in patients with heart failure and preserved ejection fraction. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
Heart failure with preserved ejection fraction (HFpEF) is characterized by heart failure symptoms despite preserved LV systolic function together with at least one among left ventricle hypertrophy/left atrial enlargement plus diastolic dysfunction (DD) and increased brain natriuretic peptide levels. Rest echocardiography could still be normal despite patients experience HF symptoms. Speckle tracking analysis (STE) analyzes myocardial deformation and is able to identify subtle left ventricular dysfunction.
PURPOSE
to analyze the added value of stress echocardiography to improve diagnostic accuracy in patients with normal ejection fraction and unexplained dyspnoea by evaluating DD, lung B lines and STE.
METHODS
Main inclusion criteria were: suspected heart failure, EF > 40%, DD up to moderate at rest (E/e"<14), age < 85 and >18 years, satisfactory acoustic window. Exclusion criteria were: comorbidities limiting the prognosis, valvulopathy more than moderate, coronary artery disease, moderate to severe DD at rest (E/e"≥14; E/A≥2), pregnancy or lactation. Each patient underwent physical stress echo and STE by GE Vivid 7, (AFI).
RESULTS
After measuring diastolic function parameters variation with stress, HFpEF was diagnosed in 8 patients, who had baseline non-diagnostic echocardiogram (Table 1). In the remaining 20 patients a non-cardiac etiology of dyspnoea was diagnosed (NCD). EF did not significantly change from rest to stress either in HFpEF group (58 ± 6 vs 61 ± 8.7 p:0.62) or in DNC group (59 ± 8 vs 62.2 ± 7.4; p:0.26). GLS values tended to decrease in patients with HFpEF (-18.5 ± 2.2 at baseline vs -15.96 ± 6.67 at peak stress; p:0.33), and it was stable in DNC (-17.69 ± 1.15 at baseline vs - 18.04 ± 2.02 at peak stress; p:0.64).
CONCLUSIONS
Study of diastolic function during stress echocardiography is a useful diagnostic tool to reveal HFpEF in patients with dyspnea and unremarkable baseline echocardiogram. STE could offer useful adjunctive diagnostic information but further studies are needed to confirm its value.
Table 1 HFpEF NCD p HFpEF NCD p GLS -18,5 ± 2,2 -17,6 ± 1,15 0,23 -15,96 ± 6,67 18,04 ± 2,02 0,26 E/A 0,8 ± 0,1 1 ± 0,7 0,55 1,67 ± 0,7 1,26 ± 0,6 0,07 E/e’ 10,1 ± 2,2 9,9 ± 3,7 0,4 16,4 ± 0,9 13,8 ± 5 0,16 PAP 25,6 ± 4,1 22,33 ± 0,55 0,57 49,8 ± 9,65 28,27 ± 4,35 0,001 LA 35,5 ± 8,5 23,44 ± 4,9 0,001 34,45 ± 4,88 27,32 ± 7,33 0,018 EF 58 ± 6 59 ± 8 0,6 61 ± 8,7 62,2 ± 7,4 0,7 Echocardiographic parameters at baseline and at peak stress in patients with HFpEF and with NCD
Collapse
Affiliation(s)
- D Di Lisi
- University of Palermo, Palermo, Italy
| | - A Lupo
- University of Palermo, Palermo, Italy
| | | | - C Nugara
- University of Palermo, Palermo, Italy
| | | | - G Evola
- University of Palermo, Palermo, Italy
| | - R Trapani
- University of Palermo, Palermo, Italy
| | - S Novo
- University of Palermo, Palermo, Italy
| | - G Novo
- University of Palermo, Palermo, Italy
| |
Collapse
|
10
|
Castellano F, Lupo A, Nugara C, Triolo OF, Evola G, Di Lisi D, Trapani R, Novo S, Novo G. P1462 Additive value of global longitudinal strain measurement in patients with known or suspected ischaemic heart disease undergoing stress echo. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
Speckle-tracking echocardiography (STE) can be applied in a large variety of clinical conditions.
Global longitudinal strain (GLS) shows high diagnostic accuracy for the detection of myocardial
ischemia as it reflects changes in subendocardial fibers deformation that are more exposed to
ischemic damage, even before alterations in segmental kinetics are revealed.
PURPOSE
Aim of our study was to assess whether the measurement of global longitudinal strain during
stress-echo can provide additional information compared to the assessment of conventional
parameters such as left ventricular ejection fraction (LVEF) and wall motion abnormalities. We
also evaluated the added value of strain in patients with complete (CRP) and incomplete
revascularization (IRP).
METHODS
We enrolled 69 patients, 39 with known (IHD) and 30 with suspected ischaemic heart disease
(SIHD) with indication to perform a stress echocardiogram. Inclusion criteria were: known or
suspected CAD, age <85 and >18, adeguate acoustic window. Cardiological evaluation and stress
echo were performed in all patients. Primary end point was evaluating whether in patients with
negative stress test the presence of reduced GLS identifies patients with an adverse prognosis at
follow up and to assess if in IRP and negative stress test there is evidence of left subclinical ventricular
dysfunction identifiable by GLS analysis compared to CRP.
RESULTS
LVEF was significantly reduced in IHD patients compared to SIHD patients (54 ± 7vs 60 ± 4 at rest;
55 ± 8vs62 ± 3 at peak; p < 0.0001). We also observed a significant reduction of GLS in IHD patients
compared to SIHD patients (-16.7 ± 4,3vs-19 ± 2.2 - p = 0.07 at rest, -18 ± 4.6vs22 ± 3.4-p = 0.004 at
peak). In CRP patients GLS did not change significantly with a tendency to improve (-17.6 ± 4 at rest
vs -19 ± 4.5 at peak - p = 0.4). Instead in IRP patients, significant reduction of GLS was observed at
peak (17.5 ± 0.7 at rest vs 14.2 ± 0.3 at peak, p value 0,03). LVEF did not significantly differ in CRP
(54 ± 5 at baseline vs 55 ± 7 at peak, p = 0.5) and IRP (52 ± 9 at baseline vs. 52 ± 9 at peak, p =
0.9) .
CONCLUSIONS
Our study shows that strain analysis during stress echocardiography can provide additional information in identifying a subclinical reduction of myocardial function at baseline and
a reduction in contractile reserve under stress, secondary to coronary flow reduction. Being GLS a
powerful prognostic marker probably patients with negative stress test and incomplete
revascularization, reduced baseline GLS and reduction of GLS at peak exercise represent a population at higher risk of coronary artery disease progression and development of left ventricular dysfunction who need a closer follow up. To verify our hypothesis we plan to increase our sample size and to
prospectively follow up our patients.
Collapse
Affiliation(s)
| | - A Lupo
- University of Palermo, Palermo, Italy
| | - C Nugara
- University of Palermo, Palermo, Italy
| | | | - G Evola
- University of Palermo, Palermo, Italy
| | - D Di Lisi
- University of Palermo, Palermo, Italy
| | - R Trapani
- University of Palermo, Palermo, Italy
| | - S Novo
- University of Palermo, Palermo, Italy
| | - G Novo
- University of Palermo, Palermo, Italy
| |
Collapse
|
11
|
Presset M, Djordjevic D, Dupont A, Le Gall E, Molinier-Frenkel V, Castellano F. Identification of inhibitors of the immunosuppressive enzyme IL4I1. Bioorg Chem 2019; 94:103463. [PMID: 31812258 DOI: 10.1016/j.bioorg.2019.103463] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 11/19/2019] [Accepted: 11/20/2019] [Indexed: 10/25/2022]
Affiliation(s)
- Marc Presset
- Electrochimie et Synthèse Organique, Université Paris Est, ICMPE (UMR 7182), CNRS, UPEC, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Diana Djordjevic
- INSERM, U955, Equipe 09, Créteil, France; Université Paris Est, Faculté de Médecine, Créteil, France
| | - Aurélie Dupont
- INSERM, U955, Equipe 09, Créteil, France; Université Paris Est, Faculté de Médecine, Créteil, France
| | - Erwan Le Gall
- Electrochimie et Synthèse Organique, Université Paris Est, ICMPE (UMR 7182), CNRS, UPEC, 2 rue Henri Dunant, F-94320 Thiais, France
| | - Valérie Molinier-Frenkel
- INSERM, U955, Equipe 09, Créteil, France; Université Paris Est, Faculté de Médecine, Créteil, France; AP-HP, Hôpital H. Mondor - A. Chenevier, Laboratoire d'Immunologie, Créteil, France.
| | - Flavia Castellano
- INSERM, U955, Equipe 09, Créteil, France; Université Paris Est, Faculté de Médecine, Créteil, France.
| |
Collapse
|
12
|
Molinier-Frenkel V, Prévost-Blondel A, Castellano F. The IL4I1 Enzyme: A New Player in the Immunosuppressive Tumor Microenvironment. Cells 2019; 8:E757. [PMID: 31330829 PMCID: PMC6678094 DOI: 10.3390/cells8070757] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/18/2019] [Accepted: 07/19/2019] [Indexed: 12/14/2022] Open
Abstract
The high metabolic needs of T lymphocytes in response to activation make them particularly vulnerable to modifications of their biochemical milieu. Immunosuppressive enzymes produced in the tumor microenvironment modify nutrient availability by catabolizing essential or semi-essential amino acids and producing toxic catabolites, thus participating in the local sabotage of the antitumor immune response. L-amino-acid oxidases are FAD-bound enzymes found throughout evolution, from bacteria to mammals, and are often endowed with anti-infectious properties. IL4I1 is a secreted L-phenylalanine oxidase mainly produced by inflammatory antigen-presenting cells-in particular, macrophages present in T helper type 1 granulomas and in various types of tumors. In the last decade, it has been shown that IL4I1 is involved in the fine control of B- and T-cell adaptive immune responses. Preclinical models have revealed its role in cancer immune evasion. Recent clinical data highlight IL4I1 as a new potential prognostic marker in human melanoma. As a secreted enzyme, IL4I1 may represent an easily targetable molecule for cancer immunotherapy.
Collapse
Affiliation(s)
- Valérie Molinier-Frenkel
- INSERM, U955, Team 09, 94010 Créteil, France.
- Faculty of Medicine, University Paris Est, 94010 Créteil, France.
- AP-HP, H. Mondor - A. Chenevier Hospital, Biological Immunology Service, 94010 Créteil, France.
| | - Armelle Prévost-Blondel
- INSERM, U1016, Institute Cochin, 75014 Paris, France
- CNRS, UMR8104, 75014 Paris, France
- University Paris Descartes, Sorbonne Paris Cité, 75014 Paris, France
| | - Flavia Castellano
- INSERM, U955, Team 09, 94010 Créteil, France.
- Faculty of Medicine, University Paris Est, 94010 Créteil, France.
| |
Collapse
|
13
|
Ramspott JP, Bekkat F, Bod L, Favier M, Terris B, Salomon A, Djerroudi L, Zaenker KS, Richard Y, Molinier-Frenkel V, Castellano F, Avril MF, Prévost-Blondel A. Emerging Role of IL-4–Induced Gene 1 as a Prognostic Biomarker Affecting the Local T-Cell Response in Human Cutaneous Melanoma. J Invest Dermatol 2018; 138:2625-2634. [DOI: 10.1016/j.jid.2018.06.178] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 06/04/2018] [Accepted: 06/18/2018] [Indexed: 12/28/2022]
|
14
|
Papouin B, Oro S, Martin N, Castellano F, Frenkel V, Ortonne N. Expression de l’enzyme immunosuppressive IL4I1 dans les lymphomes cutanés : un rôle dans l’échappement immunitaire des cellules tumorales ? Ann Dermatol Venereol 2018. [DOI: 10.1016/j.annder.2018.09.073] [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: 11/26/2022]
|
15
|
Bod L, Douguet L, Auffray C, Lengagne R, Bekkat F, Rondeau E, Molinier-Frenkel V, Castellano F, Richard Y, Prévost-Blondel A. IL-4-Induced Gene 1: A Negative Immune Checkpoint Controlling B Cell Differentiation and Activation. J Immunol 2017; 200:1027-1038. [PMID: 29288206 DOI: 10.4049/jimmunol.1601609] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 11/26/2017] [Indexed: 11/19/2022]
Abstract
Emerging data highlight the crucial role of enzymes involved in amino acid metabolism in immune cell biology. IL-4-induced gene-1 (IL4I1), a secreted l-phenylalanine oxidase expressed by APCs, has been detected in B cells, yet its immunoregulatory role has only been explored on T cells. In this study, we show that IL4I1 regulates multiple steps in B cell physiology. Indeed, IL4I1 knockout mice exhibit an accelerated B cell egress from the bone marrow, resulting in the accumulation of peripheral follicular B cells. They also present a higher serum level of natural Igs and self-reactive Abs. We also demonstrate that IL4I1 produced by B cells themselves controls the germinal center reaction, plasma cell differentiation, and specific Ab production in response to T dependent Ags, SRBC, and NP-KLH. In vitro, IL4I1-deficient B cells proliferate more efficiently than their wild-type counterparts in response to BCR cross-linking. Moreover, the absence of IL4I1 increases activation of the Syk-Akt-S6kinase signaling pathway and calcium mobilization, and inhibits SHP-1 activity upon BCR engagement, thus supporting that IL4I1 negatively controls BCR-dependent activation. Overall, our study reveals a new perspective on IL4I1 as a key regulator of B cell biology.
Collapse
Affiliation(s)
- Lloyd Bod
- INSERM, U1016, Institut Cochin, 75014 Paris, France.,CNRS, UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Laetitia Douguet
- INSERM, U1016, Institut Cochin, 75014 Paris, France.,CNRS, UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Cédric Auffray
- INSERM, U1016, Institut Cochin, 75014 Paris, France.,CNRS, UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Renée Lengagne
- INSERM, U1016, Institut Cochin, 75014 Paris, France.,CNRS, UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Fériel Bekkat
- INSERM, U1016, Institut Cochin, 75014 Paris, France.,CNRS, UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Elena Rondeau
- INSERM, U1016, Institut Cochin, 75014 Paris, France.,CNRS, UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Valérie Molinier-Frenkel
- INSERM, U955, Equipe 09, 94000 Créteil, France.,Faculté de Médecine, Université Paris Est, 94000 Créteil, France.,Assistance Publique - Hôpitaux de Paris, Hôpital Henri Mondor - Albert Chenevier, Service d'Immunologie Biologique, 94000 Créteil, France; and
| | - Flavia Castellano
- INSERM, U955, Equipe 09, 94000 Créteil, France.,Faculté de Médecine, Université Paris Est, 94000 Créteil, France.,Assistance Publique - Hôpitaux de Paris, Hôpital Henri Mondor - Albert Chenevier, Plateforme de Ressources Biologiques, 94000 Créteil, France
| | - Yolande Richard
- INSERM, U1016, Institut Cochin, 75014 Paris, France; .,CNRS, UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Armelle Prévost-Blondel
- INSERM, U1016, Institut Cochin, 75014 Paris, France; .,CNRS, UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| |
Collapse
|
16
|
Frati F, Scurati S, Puccinelli P, Morviducci C, Di Cara G, Boccardo R, Piergentili E, Milioni M, Bernardini R, Sambugaro R, Castellano F, Varricchio A, Manfredi G, Cordero L, Russello M, Guercio E, Mauro M, Incorvaia C. Inflammation in Respiratory Allergy Treated by Sublingual Immunotherapy. EUR J INFLAMM 2017. [DOI: 10.1177/1721727x0900700301] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The most common allergic diseases, such as rhinitis, asthma and atopic dermatitis, are sustained by allergic inflammation, the treatment of which requires anti-inflammatory activity. Among the available treatments, allergen immunotherapy (IT) has a documented impact on allergic inflammation which persists after its discontinuation and modifies the natural course of allergy. The anti-inflammatory effects of IT, and particularly of sublingual IT (SLIT), are based on the ability to modify the phenotype of T cells which, in allergic subjects, are characterized by a prevalence of the Th2 type, with production of IL-4, IL-5, IL-13, IL-17, and IL-32 cytokines. IT-induced changes result in a Th1-type response (immune deviation) related to an increased IFN-gamma and IL-2 production or in a Th2 reduced activity, through a mechanism of anergy or tolerance. It is now known that T cell tolerance is characterized by the generation of allergen-specific Treg cells, which produce cytokines such as IL-10 and TGF-beta with immunosuppressant and/or immunoregulatory activity. Recent studies suggest that the anti-inflammatory mechanism of SLIT is similar to classical, subcutaneous IT, with a prominent role in SLIT for mucosal dendritic cells. The tolerance pattern induced by Treg accounts for the suppressed or reduced activity of inflammatory cells and for the isotypic switch of antibody synthesis from IgE to IgG, and especially to IgG4. Data obtained from biopsies clearly indicate that the pathophysiology of the oral mucosa plays a pivotal role in inducing tolerance to the sublingually administered allergen.
Collapse
Affiliation(s)
- F. Frati
- Pediatrics, University Department of Medical and Surgical Specialty and Public Health, Perugia
- Medical and Scientific Department, Stallergenes, Milan
| | - S. Scurati
- Medical and Scientific Department, Stallergenes, Milan
| | - P. Puccinelli
- Medical and Scientific Department, Stallergenes, Milan
| | | | - G. Di Cara
- Pediatrics, University Department of Medical and Surgical Specialty and Public Health, Perugia
| | - R. Boccardo
- Pediatrics, University Department of Medical and Surgical Specialty and Public Health, Perugia
| | - E. Piergentili
- Pediatrics, University Department of Medical and Surgical Specialty and Public Health, Perugia
| | - M. Milioni
- Pediatrics, University Department of Medical and Surgical Specialty and Public Health, Perugia
| | | | | | | | | | - G. Manfredi
- Clinical Immunology, Miulli Hospital, Acquaviva delle Fonti
| | - L. Cordero
- Pneumology Unit, University Hospital, Sassari
| | | | - E. Guercio
- General Hospital, Castrovillari, Cosenza
| | - M. Mauro
- Allergy Unit, Sant'Anna Hospital, Como
| | - C. Incorvaia
- Allergy/Pulmonary rehabilitation Unit, ICP Hospital, Milan, Italy
| |
Collapse
|
17
|
Aubatin A, Sako N, Decrouy X, Donnadieu E, Molinier-Frenkel V, Castellano F. IL4-induced gene 1 is secreted at the immune synapse and modulates TCR activation independently of its enzymatic activity. Eur J Immunol 2017; 48:106-119. [PMID: 28891065 DOI: 10.1002/eji.201646769] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 10/18/2016] [Revised: 08/21/2017] [Accepted: 09/06/2017] [Indexed: 01/11/2023]
Abstract
Amino-acid catabolizing enzymes produced by mononuclear phagocytes play a central role in regulating the immune response. The mammalian phenylalanine-catabolizing enzyme IL4-induced gene 1 (IL4I1) inhibits effector T lymphocyte proliferation and facilitates regulatory T-cell development. IL4I1 expression by macrophages of various human tumors may affect patient prognosis as it facilitates tumor escape from the T-cell response in murine models. Its enzymatic activity appears to participate in its effects, but some actions of IL4I1 remain unclear. Here, we show that the presence of IL4I1 during T-cell activation decreases early signaling events downstream of TCR stimulation, resulting in global T-cell inhibition which is more pronounced when there is CD28 costimulation. Surprisingly, the enzymatic activity of IL4I1 is not involved. Focal secretion of IL4I1 into the immune synaptic cleft and its binding to CD3+ lymphocytes could be important in IL4I1 immunosuppressive mechanism of action.
Collapse
Affiliation(s)
- Aude Aubatin
- INSERM, U955, Equipe 09, Créteil, France.,Faculté de Médecine, Université Paris Est, Créteil, France
| | - Nouhoum Sako
- INSERM, U955, Equipe 09, Créteil, France.,Faculté de Médecine, Université Paris Est, Créteil, France
| | - Xavier Decrouy
- INSERM, U955, Plateforme d'imagerie, Créteil, France.,Faculté de Médecine, Université Paris Est, Créteil, France
| | - Emmanuel Donnadieu
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Valérie Molinier-Frenkel
- INSERM, U955, Equipe 09, Créteil, France.,Faculté de Médecine, Université Paris Est, Créteil, France.,AP-HP, Hôpital H. Mondor - A. Chenevier, Service d'Immunologie Biologique, Créteil, France
| | - Flavia Castellano
- INSERM, U955, Equipe 09, Créteil, France.,Faculté de Médecine, Université Paris Est, Créteil, France.,AP-HP, Hôpital H. Mondor - A. Chenevier, Plateforme de Ressources Biologiques, Créteil, France
| |
Collapse
|
18
|
Seddigh P, Bracht T, Molinier-Frenkel V, Castellano F, Kniemeyer O, Schuster M, Weski J, Hasenberg A, Kraus A, Poschet G, Hager T, Theegarten D, Opitz CA, Brakhage AA, Sitek B, Hasenberg M, Gunzer M. Quantitative Analysis of Proteome Modulations in Alveolar Epithelial Type II Cells in Response to Pulmonary Aspergillus fumigatus Infection. Mol Cell Proteomics 2017; 16:2184-2198. [PMID: 28951444 DOI: 10.1074/mcp.ra117.000072] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Indexed: 12/14/2022] Open
Abstract
The ubiquitous mold Aspergillus fumigatus threatens immunosuppressed patients as inducer of lethal invasive aspergillosis. A. fumigatus conidia are airborne and reach the alveoli, where they encounter alveolar epithelial cells (AEC). Previous studies reported the importance of the surfactant-producing AEC II during A. fumigatus infection via in vitro experiments using cell lines. We established a negative isolation protocol yielding untouched primary murine AEC II with a purity >90%, allowing ex vivo analyses of the cells, which encountered the mold in vivo By label-free proteome analysis of AEC II isolated from mice 24h after A. fumigatus or mock infection we quantified 2256 proteins and found 154 proteins to be significantly differentially abundant between both groups (ANOVA p value ≤ 0.01, ratio of means ≥1.5 or ≤0.67, quantified with ≥2 peptides). Most of these proteins were higher abundant in the infected condition and reflected a comprehensive activation of AEC II on interaction with A. fumigatus This was especially represented by proteins related to oxidative phosphorylation, hence energy production. However, the most strongly induced protein was the l-amino acid oxidase (LAAO) Interleukin 4 induced 1 (IL4I1) with a 42.9 fold higher abundance (ANOVA p value 2.91-10). IL4I1 has previously been found in B cells, macrophages, dendritic cells and rare neurons. Increased IL4I1 abundance in AEC II was confirmed by qPCR, Western blot and immunohistology. Furthermore, A. fumigatus infected lungs showed high levels of IL4I1 metabolic products. Importantly, higher IL4I1 abundance was also confirmed in lung tissue from human aspergilloma. Because LAAO are key enzymes for bactericidal product generation, AEC II might actively participate in pathogen defense. We provide insights into proteome changes of primary AEC II thereby opening new avenues to analyze the molecular changes of this central lung cell on infectious threats. Data are available via ProteomeXchange with identifier PXD005834.
Collapse
Affiliation(s)
- Pegah Seddigh
- From the ‡University Duisburg-Essen, University Hospital, Institute for Experimental Immunology and Imaging, 45147 Essen; Germany
| | - Thilo Bracht
- ¶Ruhr-Universität Bochum, Medizinisches Proteom-Center, 44801 Bochum, Germany
| | | | - Flavia Castellano
- **INSERM U955, Equipe 09, UMR_S955, UPEC, APHP, Hôpital H Mondor, Créteil, France
| | - Olaf Kniemeyer
- ‖Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institutes (HKI), Department of Molecular and Applied Microbiology, Jena, 07745 Jena, Germany
| | - Marc Schuster
- From the ‡University Duisburg-Essen, University Hospital, Institute for Experimental Immunology and Imaging, 45147 Essen; Germany
| | - Juliane Weski
- From the ‡University Duisburg-Essen, University Hospital, Institute for Experimental Immunology and Imaging, 45147 Essen; Germany
| | - Anja Hasenberg
- From the ‡University Duisburg-Essen, University Hospital, Institute for Experimental Immunology and Imaging, 45147 Essen; Germany
| | - Andreas Kraus
- From the ‡University Duisburg-Essen, University Hospital, Institute for Experimental Immunology and Imaging, 45147 Essen; Germany
| | - Gernot Poschet
- §§Centre for Organismal Studies (COS), University of Heidelberg, Heidelberg, Germany
| | - Thomas Hager
- ¶¶University Duisburg-Essen, University Hospital, Institute for Pathology, 45147 Essen, Germany
| | - Dirk Theegarten
- ¶¶University Duisburg-Essen, University Hospital, Institute for Pathology, 45147 Essen, Germany
| | - Christiane A Opitz
- ‡‡German Cancer Research Center (DKFZ), Junior Group Brain Cancer Metabolism (G161), 69120 Heidelberg, Germany
| | - Axel A Brakhage
- ‖Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institutes (HKI), Department of Molecular and Applied Microbiology, Jena, 07745 Jena, Germany
| | - Barbara Sitek
- ¶Ruhr-Universität Bochum, Medizinisches Proteom-Center, 44801 Bochum, Germany;
| | - Mike Hasenberg
- §University Duisburg-Essen, University Hospital, Imaging Center Essen (IMCES), Electron Microscopy Unit, 45147 Essen, Germany;
| | - Matthias Gunzer
- From the ‡University Duisburg-Essen, University Hospital, Institute for Experimental Immunology and Imaging, 45147 Essen; Germany;
| |
Collapse
|
19
|
Molinier-Frenkel V, Castellano F. Immunosuppressive enzymes in the tumor microenvironment. FEBS Lett 2017; 591:3135-3157. [DOI: 10.1002/1873-3468.12784] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/31/2017] [Accepted: 08/03/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Valérie Molinier-Frenkel
- INSERM, U955, Equipe 09; Créteil France
- Faculté de Médecine; Université Paris Est; Créteil France
- Service d'Immunologie Biologique; AP-HP, Hôpital H. Mondor - A. Chenevier; Créteil France
| | - Flavia Castellano
- INSERM, U955, Equipe 09; Créteil France
- Faculté de Médecine; Université Paris Est; Créteil France
- Plateforme de Ressources Biologiques; AP-HP, Hôpital H. Mondor - A. Chenevier; Créteil France
| |
Collapse
|
20
|
Bod L, Lengagne R, Wrobel L, Ramspott JP, Kato M, Avril MF, Castellano F, Molinier-Frenkel V, Prévost-Blondel A. IL4-induced gene 1 promotes tumor growth by shaping the immune microenvironment in melanoma. Oncoimmunology 2017; 6:e1278331. [PMID: 28405502 DOI: 10.1080/2162402x.2016.1278331] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [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: 11/22/2016] [Revised: 12/21/2016] [Accepted: 12/28/2016] [Indexed: 12/11/2022] Open
Abstract
Amino acid catabolizing enzymes emerged as a crucial mechanism used by tumors to dampen immune responses. The L-phenylalanine oxidase IL-4 induced gene 1 (IL4I1) is expressed by tumor-associated myeloid cells of most solid tumors, including melanoma. We previously provided the only evidence that IL4I1 accelerates tumor growth by limiting the CD8+ T cell mediated immune response, in a mouse model of melanoma cell transplantation. Here, we explored the role of IL4I1 in Ret mice, a spontaneous model of melanoma. We found that IL4I1 was expressed by CD11b+ myeloid cells and that its activity correlated with disease aggressiveness. IL4I1 did not enhance tumor cell proliferation or angiogenesis, but orchestrated the remodeling of the immune compartment within the primary tumor. Indeed, the inactivation of IL4I1 limited the recruitment of polymorphonuclear myeloid-derived suppressor cells and enhanced the infiltration by Th1 and cytotoxic T cells, thus delaying tumor development and metastatic dissemination. Accordingly, human primary melanomas that were poorly infiltrated by IL4I1+ cells exhibited a higher density of CD8+ T cells. Collectively, our findings strengthen the rationale for therapeutic targeting of IL4I1 as one of the key immune regulators.
Collapse
Affiliation(s)
- Lloyd Bod
- Inserm, U1016, Institut Cochin, Paris, France; Cnrs, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Renée Lengagne
- Inserm, U1016, Institut Cochin, Paris, France; Cnrs, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | | | - Jan Philipp Ramspott
- Inserm, U1016, Institut Cochin, Paris, France; Cnrs, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Masashi Kato
- Nagoya University Graduate School of Medicine , Nagoya, Aichi, Japan
| | - Marie-Françoise Avril
- Inserm, U1016, Institut Cochin, Paris, France; Cnrs, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France; APHP, Hôpital Cochin, Paris, France
| | - Flavia Castellano
- INSERM, U955, Equipe 09, Créteil, France; Université Paris Est, Faculté de Médecine, Créteil, France; AP-HP, Hôpital H. Mondor - A. Chenevier, Plateforme de Ressources Biologiques, Créteil, France
| | - Valérie Molinier-Frenkel
- INSERM, U955, Equipe 09, Créteil, France; Université Paris Est, Faculté de Médecine, Créteil, France; AP-HP, Hôpital H. Mondor - A. Chenevier, Service d'Immunologie Biologique, Créteil, France
| | - Armelle Prévost-Blondel
- Inserm, U1016, Institut Cochin, Paris, France; Cnrs, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| |
Collapse
|
21
|
|
22
|
Kerbrat S, Vingert B, Junier MP, Castellano F, Renault-Mihara F, Dos Reis Tavares S, Surenaud M, Noizat-Pirenne F, Boczkowski J, Guellaën G, Chneiweiss H, Le Gouvello S. Absence of the Adaptor Protein PEA-15 Is Associated with Altered Pattern of Th Cytokines Production by Activated CD4+ T Lymphocytes In Vitro, and Defective Red Blood Cell Alloimmune Response In Vivo. PLoS One 2015; 10:e0136885. [PMID: 26317969 PMCID: PMC4552951 DOI: 10.1371/journal.pone.0136885] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 08/10/2015] [Indexed: 01/08/2023] Open
Abstract
TCR-dependent and costimulation signaling, cell division, and cytokine environment are major factors driving cytokines expression induced by CD4+ T cell activation. PEA-15 15 (Protein Enriched in Astrocyte / 15kDa) is an adaptor protein that regulates death receptor-induced apoptosis and proliferation signaling by binding to FADD and relocating ERK1/2 to the cytosol, respectively. By using PEA-15-deficient mice, we examined the role of PEA-15 in TCR-dependent cytokine production in CD4+ T cells. TCR-stimulated PEA-15-deficient CD4+ T cells exhibited defective progression through the cell cycle associated with impaired expression of cyclin E and phosphoRb, two ERK1/2-dependent proteins of the cell cycle. Accordingly, expression of the division cycle-dependent cytokines IL-2 and IFNγ, a Th1 cytokine, was reduced in stimulated PEA-15-deficient CD4+ T cells. This was associated with abnormal subcellular compartmentalization of activated ERK1/2 in PEA-15-deficient T cells. Furthermore, in vitro TCR-dependent differentiation of naive CD4+ CD62L+ PEA-15-deficient T cells was associated with a lower production of the Th2 cytokine, IL-4, whereas expression of the Th17-associated molecule IL4I1 was enhanced. Finally, a defective humoral response was shown in PEA-15-deficient mice in a model of red blood cell alloimmunization performed with Poly IC, a classical adjuvant of Th1 response in vivo. Collectively, our data suggest that PEA-15 contributes to the specification of the cytokine pattern of activated Th cells, thus highlighting a potential new target to interfere with T cell functional polarization and subsequent immune response.
Collapse
Affiliation(s)
- Stéphane Kerbrat
- Université Paris-Est, Créteil, France
- Inserm U955, Créteil, France
| | - Benoit Vingert
- Inserm U955, Créteil, France
- Etablissement Français du Sang, Créteil, France
| | - Marie-Pierre Junier
- Inserm, U1130, Neuroscience Paris Seine, IBPS, Paris, France
- Université Pierre et Marie Curie, UM119, Neuroscience Paris Seine, IBPS, Paris, France
- CNRS, UMR8246, Neuroscience Paris Seine, IBPS, Paris, France
| | - Flavia Castellano
- Université Paris-Est, Créteil, France
- Inserm U955, Créteil, France
- AP-HP, Hôpital H. Mondor- A. Chenevier, Pôle de Biologie-Pathologie, Créteil, France
| | - François Renault-Mihara
- Inserm, U1130, Neuroscience Paris Seine, IBPS, Paris, France
- Université Pierre et Marie Curie, UM119, Neuroscience Paris Seine, IBPS, Paris, France
- CNRS, UMR8246, Neuroscience Paris Seine, IBPS, Paris, France
| | - Silvina Dos Reis Tavares
- Inserm, U1130, Neuroscience Paris Seine, IBPS, Paris, France
- Université Pierre et Marie Curie, UM119, Neuroscience Paris Seine, IBPS, Paris, France
- CNRS, UMR8246, Neuroscience Paris Seine, IBPS, Paris, France
| | | | - France Noizat-Pirenne
- Université Paris-Est, Créteil, France
- Inserm U955, Créteil, France
- Etablissement Français du Sang, Créteil, France
| | - Jorge Boczkowski
- Université Paris-Est, Créteil, France
- Inserm U955, Créteil, France
| | - Georges Guellaën
- Université Paris-Est, Créteil, France
- Inserm U955, Créteil, France
| | - Hervé Chneiweiss
- Inserm, U1130, Neuroscience Paris Seine, IBPS, Paris, France
- Université Pierre et Marie Curie, UM119, Neuroscience Paris Seine, IBPS, Paris, France
- CNRS, UMR8246, Neuroscience Paris Seine, IBPS, Paris, France
- * E-mail: (SLG); (HC)
| | - Sabine Le Gouvello
- Université Paris-Est, Créteil, France
- Inserm U955, Créteil, France
- AP-HP, Hôpital H. Mondor- A. Chenevier, Pôle de Biologie-Pathologie, Créteil, France
- * E-mail: (SLG); (HC)
| |
Collapse
|
23
|
Cousin C, Aubatin A, Le Gouvello S, Apetoh L, Castellano F, Molinier-Frenkel V. The immunosuppressive enzyme IL4I1 promotes FoxP3(+) regulatory T lymphocyte differentiation. Eur J Immunol 2015; 45:1772-82. [PMID: 25778793 DOI: 10.1002/eji.201445000] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [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: 07/04/2014] [Revised: 01/30/2015] [Accepted: 03/12/2015] [Indexed: 01/29/2023]
Abstract
IL4I1 (interleukin-4-induced gene 1) is a phenylalanine oxidase produced mainly by APCs of myeloid origin, and converts phenylalanine (Phe) to phenylpyruvate, hydrogen peroxide, and ammonia. We have previously shown that IL4I1 is highly expressed by tumor-associated macrophages from various human cancers and facilitates immune evasion from the cytotoxic response in a murine tumor model. Indeed, IL4I1 inhibits T-cell proliferation via hydrogen peroxide toxicity on effector/memory T cells. Here, we explored the effect of IL4I1 on naïve CD4(+) T-cell differentiation. We show that IL4I1 stimulates the generation of Foxp3(+) regulatory T (Treg) cells in vitro from human and mouse T cells. This effect was observed with IL4I1 from different sources, including the naturally produced enzyme. Conversely, IL4I1 limits Th1 and Th2 polarization while modifying the Th17 phenotype, in particular, by inducing its own production. Analysis of Treg-cell induction under conditions of Phe deprivation and hydrogen peroxide addition suggests that Phe consumption by the enzyme participates in Treg-cell enrichment. In line with this hypothesis, IL4I1 inhibits mTORC1 signaling shortly after T-cell activation. Thus, the IL4I1 enzyme may act on T cells both by direct inhibition of effector cell proliferation and by indirect immunoregulation mediated by Treg-cell induction.
Collapse
Affiliation(s)
- Céline Cousin
- INSERM, U955, Equipe 09 and Equipe 04, Créteil, France.,Université Paris Est, Faculté de médecine, Créteil, France
| | - Aude Aubatin
- INSERM, U955, Equipe 09 and Equipe 04, Créteil, France.,Université Paris Est, Faculté de médecine, Créteil, France
| | - Sabine Le Gouvello
- INSERM, U955, Equipe 09 and Equipe 04, Créteil, France.,Université Paris Est, Faculté de médecine, Créteil, France.,AP-HP, Hôpital H. Mondor - A. Chenevier, Service d'Immunologie Biologique, Créteil, France
| | - Lionel Apetoh
- INSERM, U866, Dijon, France.,Centre Georges François Leclerc, Dijon, France.,Université de Bourgogne, Dijon, France
| | - Flavia Castellano
- INSERM, U955, Equipe 09 and Equipe 04, Créteil, France.,Université Paris Est, Faculté de médecine, Créteil, France.,AP-HP, Hôpital H. Mondor - A. Chenevier, Service d'Immunologie Biologique, Créteil, France
| | - Valérie Molinier-Frenkel
- INSERM, U955, Equipe 09 and Equipe 04, Créteil, France.,Université Paris Est, Faculté de médecine, Créteil, France.,AP-HP, Hôpital H. Mondor - A. Chenevier, Service d'Immunologie Biologique, Créteil, France
| |
Collapse
|
24
|
Castellano F, Lax A, Gamba G, Santambrogio J, Tremolada M, Amidani F, Rossetti A, Capuzzi E, Crocamo C, Nava R, Carrà G, Papagno C, Clerici M. Facial Emotion Recognition and Disorganization in Subjects with Schizophrenia and Alcohol, Substance Use Disorder. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)30968-8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
25
|
Ruggiero G, Castellano F. Carotid-Cavernous Aneurysm. Acta Radiol 2013. [DOI: 10.1177/028418515203700205] [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: 11/15/2022]
|
26
|
Ruggiero G, Castellano F. Upward Displacement of the Posterior Part of the Third Ventricle: A Method for its Evaluation. Acta Radiol 2013. [DOI: 10.1177/028418515303900503] [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: 11/15/2022]
|
27
|
Novo G, Fazio G, Di Salvo G, Di Bella G, Zito C, Carità P, Centineo F, Toia P, Mancuso D, Castellano F, Carerj S, Novo S. Rare cardiomyopathies: diagnostic features. Minerva Cardioangiol 2013; 61:351-365. [PMID: 23681138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Cardiomyopathies (CM) are an important and heterogeneous group of diseases affecting the myocardium. They can induce mechanical and/or electrical disorders and are due to a variety of causes, they frequently are genetic. However, since their high number and their clinical complexity, the identification is still a challenge. Echocardiography is a very useful tool in the assessment of CM. In this review we aim to define the typical clinical features and to discuss the main diagnostic tool, above all echocardiography that can help physicians in the correct assessment of CM.
Collapse
Affiliation(s)
- G Novo
- University of Palermo, Palermo, Italy.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Puiffe ML, Lachaise I, Molinier-Frenkel V, Castellano F. Antibacterial properties of the mammalian L-amino acid oxidase IL4I1. PLoS One 2013; 8:e54589. [PMID: 23355881 PMCID: PMC3552961 DOI: 10.1371/journal.pone.0054589] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 12/14/2012] [Indexed: 12/20/2022] Open
Abstract
L-amino acid oxidases (LAAO) are flavoproteins that catalyze the oxidative deamination of L-amino acids to a keto-acid along with the production of H2O2 and ammonia. Interleukin 4 induced gene 1 (IL4I1) is a secreted LAAO expressed by macrophages and dendritic cells stimulated by microbial derived products or interferons, which is endowed with immunoregulatory properties. It is the first LAAO described in mammalian innate immune cells. In this work, we show that this enzyme blocks the in vitro and in vivo growth of Gram negative and Gram positive bacteria. This antibiotic effect is primarily mediated by H2O2 production but is amplified by basification of the medium due to the accumulation of ammonia. The depletion of phenylalanine (the primary amino acid catabolized by IL4I1) may also participate in the in vivo inhibition of staphylococci growth. Thus, IL4I1 plays a distinct role compared to other antibacterial enzymes produced by mononuclear phagocytes.
Collapse
Affiliation(s)
- Marie-Line Puiffe
- INSERM, U955, IMRB, Equipe 09, Créteil, France
- Université Paris Est, Faculté de Médecine, Créteil, France
| | - Isabelle Lachaise
- Plateforme Chromatographie Analytique et semi Préparative, ICMPE, Thiais, France
| | - Valérie Molinier-Frenkel
- INSERM, U955, IMRB, Equipe 09, Créteil, France
- Université Paris Est, Faculté de Médecine, Créteil, France
- AP-HP, Hôpital H. Mondor - A. Chenevier, Service d’Immunologie Biologique, Créteil, France
- * E-mail: (FC); (VMF)
| | - Flavia Castellano
- INSERM, U955, IMRB, Equipe 09, Créteil, France
- Université Paris Est, Faculté de Médecine, Créteil, France
- AP-HP, Hôpital H. Mondor - A. Chenevier, Service d’Immunologie Biologique, Créteil, France
- * E-mail: (FC); (VMF)
| |
Collapse
|
29
|
Cebrián-Torrejón G, Assad Kahn S, Lagarde N, Castellano F, Leblanc K, Rodrigo J, Molinier-Frenkel V, Rojas de Arias A, Ferreira ME, Thirant C, Fournet A, Figadère B, Chneiweiss H, Poupon E. Antiproliferative activity of trans-avicennol from Zanthoxylum chiloperone var. angustifolium against human cancer stem cells. J Nat Prod 2012; 75:257-261. [PMID: 22304006 DOI: 10.1021/np2004165] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Zanthoxylum chiloperone var. angustifolium root bark was studied with the aim of finding novel molecules able to overcome cancer stem cell chemoresistance. Purification of a methanol-soluble extract resulted in the isolation of a known pyranocoumarin, trans-avicennol (1). Compound 1 demonstrated antiproliferative activity on glioma-initiating cells, whereas it was inactive on human neural stem cells. trans-Avicennol (1) activated the MAPK/ERK pathway and was also evaluated for its ability to inhibit the enzyme indoleamine-2,3-dioxygenase.
Collapse
Affiliation(s)
- Gerardo Cebrián-Torrejón
- Laboratoire de Pharmacognosie Associé au CNRS UMR 8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, Université Paris-Sud, 5 Rue Jean-Baptiste Clément, 92296 Châtenay-Malabry, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Lasoudris F, Cousin C, Prevost-Blondel A, Martin-Garcia N, Abd-Alsamad I, Ortonne N, Farcet JP, Castellano F, Molinier-Frenkel V. IL4I1: an inhibitor of the CD8⁺ antitumor T-cell response in vivo. Eur J Immunol 2011; 41:1629-38. [PMID: 21469114 DOI: 10.1002/eji.201041119] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Revised: 02/04/2011] [Accepted: 03/15/2011] [Indexed: 12/21/2022]
Abstract
The L-phenylalanine oxidase IL4I1 inhibits T-cell proliferation in vitro through H(2) O(2) production, and is highly expressed in tumor-associated macrophages. IL4I1 is also detected by immunohistochemistry in neoplastic cells from several B-cell lymphomas and some non-lymphoid tumors. To evaluate IL4I1's effect on tumor growth, we developed a mouse melanoma model constitutively coexpressing IL4I1 and the GP33 epitope. After GP33 vaccination, tumors developed more frequently in mice injected with IL4I1-expressing cells in comparison with mice receiving control cells. Tumor escape was preceded by a rapid diminution of IFN-γ-producing cytotoxic antitumor CD8(+) T cells. Moreover, tumor incidence was already increased when only 20% of the injected cells expressed IL4I1. The minimal IL4I1 activities leading to tumor escape were close to those detected in human melanoma and mesothelioma. Thus, we demonstrate the immunosuppressive functions of IL4I1 in vivo and suggest that IL4I1 facilitates human tumor growth by inhibiting the CD8(+) antitumor T-cell response.
Collapse
|
31
|
Marquet J, Lasoudris F, Cousin C, Puiffe ML, Martin-Garcia N, Baud V, Chereau F, Farcet JP, Molinier-Frenkel V, Castellano F. Dichotomy between factors inducing the immunosuppressive enzyme IL-4-induced gene 1 (IL4I1) in B lymphocytes and mononuclear phagocytes. Eur J Immunol 2010; 40:2557-68. [PMID: 20683900 DOI: 10.1002/eji.201040428] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
MPhi and DC are key elements in the control of tissue homeostasis and response to insult. In this work, we demonstrate that MPhi and DC are the major producers of the phenylalanine catabolizing enzyme IL-4-induced gene 1 (IL4I1) under inflammatory conditions. IL4I1 was first described in B cells, which indeed can produce IL4I1 in vitro, although at much lower levels. In vivo, IL4I1 is highly expressed by MPhi and DC of Th1 granulomas (sarcoidosis, tuberculosis) but poorly detected in Th2 granulomas (schistosomiasis). In vitro, expression of the enzyme is induced in mononuclear phagocytes by various pro-inflammatory stimuli through the activation of the transcription factors NF-kappaB and/or STAT1. B cells also express IL4I1 in response to NF-kappaB-activating stimuli such as CD40L; however, in contrast to myeloid cells, B cells are insensitive to IFN-gamma but respond to stimulation of the IL-4/STAT6 axis. As we show that the expression of IL4I1 by a monocytic cell line inhibits T-cell proliferation and production of IFN-gamma and inflammatory cytokines, we propose that IL4I1 participates in the downregulation of Th1 inflammation in vivo.
Collapse
|
32
|
Boulland ML, Marquet J, Molinier-Frenkel V, Möller P, Guiter C, Lasoudris F, Copie-Bergman C, Baia M, Gaulard P, Leroy K, Castellano F. Human IL4I1 is a secreted L-phenylalanine oxidase expressed by mature dendritic cells that inhibits T-lymphocyte proliferation. Blood 2007; 110:220-7. [PMID: 17356132 DOI: 10.1182/blood-2006-07-036210] [Citation(s) in RCA: 124] [Impact Index Per Article: 7.3] [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: 01/29/2023] Open
Abstract
Interleukin-4-induced gene 1 (IL4I1) was first described as a B-cell IL4-inducible gene and is highly expressed in primary mediastinal B-cell lymphomas. We established stable HEK293 clones expressing human and mouse IL4I1 to examine their biochemical properties and function. Both proteins were secreted into the culture medium, and we observed the secretion of endogenous human IL4I1 (hIL4I1) protein in a mediastinal lymphoma B-cell line, MedB-1. We showed that IL4I1 has l-amino acid oxidase activity, optimal at physiological pH and primarily directed toward phenylalanine. Immunohistochemical analysis of secondary lymphoid organs showed staining of germinal center macrophages and inflammatory myeloid cells. In vitro, functional enzyme was highest in mature dendritic cells (DCs), suggesting a role in antigen-presenting cell/T-lymphocyte cross-talk. Indeed, hIL4I1 inhibited the proliferation of CD3-stimulated T lymphocytes with a similar effect on CD4(+) and CD8(+) T cells. In contrast, memory T cells were more strongly affected by hIL4I1 and its catabolite H(2)O(2) than naive T cells. hIL4I1 inhibitory effect was dependent on enzymatic activity and H(2)O(2) production and associated with a transient down-regulation of TCRzeta expression. Altogether these data suggest IL4I1 as a new immunomodulatory enzyme produced by DCs.
Collapse
Affiliation(s)
- Marie-Laure Boulland
- Institut National de la Santé et de la Recherche Medicale, Unité 841, Institut Mondor de Recherche Médicale, Département Immunologie-Oncologie-Dermatologie, Equipe 09, Créteil, France
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Guiter C, Dusanter-Fourt I, Copie-Bergman C, Boulland ML, Le Gouvello S, Gaulard P, Leroy K, Castellano F. Constitutive STAT6 activation in primary mediastinal large B-cell lymphoma. Blood 2004; 104:543-9. [PMID: 15044251 DOI: 10.1182/blood-2003-10-3545] [Citation(s) in RCA: 165] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Primary mediastinal large B-cell lymphoma (PMBL), currently recognized as a diffuse large B-cell lymphoma (DLBCL) subtype, shows increased expression of interleukin 4 (IL-4)/IL-13 signaling effectors and targets, suggesting constitutive activation of these pathways. We therefore investigated the functional state of the signal transducer and activator of transcription 6 (STAT6), mediating IL-4/IL-13 transcriptional effects. Constitutive STAT6 phosphorylation and DNA-binding activity were detected in PMBL cell lines but not DLBCL cell lines. Moreover, immunohistochemical analysis revealed nuclear phosphorylated STAT6 (P-STAT6) in 8 of 11 PMBL, compared with 1 of 10 DLBCL primary tumors (P =.01). IL-4 and IL-13 transcripts were absent in PMBL cell lines and expressed at low levels in tumors, indicating that, contrary to classical Hodgkin lymphoma (cHL), STAT6 activation is not due to an autocrine IL-4/IL-13 secretion. We demonstrated an amplification of the JAK2 gene in 2 of 6 PMBL cases, and showed higher JAK2 mRNA levels in PMBL compared with DLBCL (P =.005). The Janus kinase 2 (JAK2) was constitutively phosphorylated in the PMBL MedB1 cell line. MedB1 treatment with JAK2 inhibitor AG490 partially decreased STAT6 phosphorylation, suggesting that JAK2 is partially involved in STAT6 activation in these cells. Our findings highlight phosphorylated STAT6 as a characteristic distinguishing PMBL from DLBCL, but a common feature to PMBL and cHL, supporting the hypothesis of common pathogenic events in these 2 lymphomas.
Collapse
Affiliation(s)
- Chrystelle Guiter
- U617, INSERM, Université Paris XII/Département de Pathologie, Hôpital Henri Mondor, AP-HP, 51 avenue du Maréchal de Lattre de Tassigny, 94010 Créteil, France
| | | | | | | | | | | | | | | |
Collapse
|
34
|
Castellano F, Mautone G. Decongestant activity of a new formulation of xylometazoline nasal spray: a double-blind, randomized versus placebo and reference drugs controlled, dose-effect study. Drugs Exp Clin Res 2002; 28:27-35. [PMID: 12073765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Xylometazoline hydrochloride is an imidazoline derivative commonly used in topical application to relieve nasal congestion associated with acute or chronic rhinitis, common cold, sinusitis and hay fever or other allergies. To reduce the negative effects on the mucosal defensive mechanism, a new formulation of xylometazoline (Rhinostop) with inactive preservatives and hyaluronic acid (HA) was studied. The most appropriate concentration of xylometazoline and its decongestant activity in the new formulation were investigated in a double-blind, dose-effect study. The new formulation at three different concentrations of xylometazoline (0.025%, 0.05% and 0.1%) was compared with a placebo formulation, three equivalent aqueous solutions containing xylometazoline (without HA) and a reference formulation, containing benzalkonium chloride as preservative. The drugs' efficacy in reducing airflow resistance was also evaluated. The effects of xylometazoline on inspiratory and expiratory nasal resistance were found to be concentration-dependent. Indeed, the new formulation at a concentration of 0.05% was more effective than the new formulation at a concentration of 0.025%, but was statistically equivalent to the new formulation at a concentration of 0.1%; therefore, the 0.05% concentration of xylometazoline seemed to achieve maximal decongestant activity. These findings were confirmed by the observation that the efficacy of the new formulation at a concentration of 0.05% was also statistically comparable to that of the reference formulation and the aqueous solution of xylometazoline 0.1%. HA seems to act as an enhancer/carrier of the active principle, xylometazoline, as already demonstrated for other drugs. The new formulation at a concentration of 0.05% was therefore selected for further clinical development.
Collapse
Affiliation(s)
- F Castellano
- IBSA Institut Biochimique S.A., 6915 Pambio-Noranco, Switzerland
| | | |
Collapse
|
35
|
Abstract
Bacteria, apoptotic cells and other particulate material are taken up through phagocytosis, a conserved cellular function driven by actin polymerization. As reviewed here, small GTPases of the Rho family, their activators and effectors control the local reorganization of the actin cytoskeleton underneath bound particles. Remarkably, the molecular actors and regulatory mechanisms involved during phagocytosis through the FcR or the CR3 receptors are very similar to those underlying the cytoskeletal rearrangements that take place at the leading edge of motile cell and at adhesion sites, respectively.
Collapse
Affiliation(s)
- F Castellano
- Laboratoire de la Dynamique de la Membrane et du Cytosquelette, Centre National de la Recherche Scientifique UMR144, Institut Curie, 26 rue d'Ulm, 75241 Paris Cedex 5, France
| | | | | |
Collapse
|
36
|
Abstract
Proteins of the Wiskott-Aldrich syndrome and Ena/VASP families both play essential functions in the regulation of actin dynamics at the cell leading edge. However, possibilities of functional interplay between members of these two families have not been addressed. Here we show that, in hemopoietic cells, recruitment of the C-terminal VCA (Verprolin homology, Cofilin homology, Acidic) domain of WASp at the plasma membrane by a ligand technique using rapamycin as an intermediate is not sufficient to elicit efficient Arp2/3 complex-mediated actin polymerization. Other domains of WASp, in particular the proline-rich domain, are required for the formation of actin-rich structures. An in vitro analysis demonstrates that the proline-rich domain of WASp binds VASP with an affinity of approximately 10(6) M(-1). In addition, WASp and VASP both accumulate in actin-rich phagocytic cups. Finally, in a reconstituted motility medium, VASP enhances actin-based propulsion of WASp-coated beads in a fashion reminiscent of its effect on Listeria movement. We propose that VASP and WASp cooperation is essential in stimulating actin assembly and membrane protrusion at the leading edge.
Collapse
Affiliation(s)
| | - Christophe Le Clainche
- Laboratoire de la Dynamique de la Membrane et du Cytosquelette, Centre National de la Recherche Scientifique UMR 144, Institut Curie, 26 rue d’Ulm, 75241 Paris Cedex 5 and
Laboratoire d’Enzymologie et Biochimie Structurale, CNRS, 91198 Gif-sur-Yvette, France Corresponding author e-mail:
| | | | - Marie-France Carlier
- Laboratoire de la Dynamique de la Membrane et du Cytosquelette, Centre National de la Recherche Scientifique UMR 144, Institut Curie, 26 rue d’Ulm, 75241 Paris Cedex 5 and
Laboratoire d’Enzymologie et Biochimie Structurale, CNRS, 91198 Gif-sur-Yvette, France Corresponding author e-mail:
| | - Philippe Chavrier
- Laboratoire de la Dynamique de la Membrane et du Cytosquelette, Centre National de la Recherche Scientifique UMR 144, Institut Curie, 26 rue d’Ulm, 75241 Paris Cedex 5 and
Laboratoire d’Enzymologie et Biochimie Structurale, CNRS, 91198 Gif-sur-Yvette, France Corresponding author e-mail:
| |
Collapse
|
37
|
Affiliation(s)
- F Castellano
- Institut Curie-Recherche, CNRS UMR 144, Paris, France
| | | |
Collapse
|
38
|
Abstract
Rac1 is a Ρ-family GTP-binding protein that controls lamellipodia formation and membrane ruffling in fibroblasts. Recently, Rac1 and Cdc42, another member of the Ρ-family, have been shown to regulate Fc receptor-mediated phagocytosis in macrophages by controlling different steps of membrane and actin dynamics leading to particle engulfment. Here, we investigated the function of Rac1 using a membrane recruitment system that mimics phagocytosis. Recruitment of an activated Rac1 protein to the cytoplasmic domain of an engineered membrane receptor by using rapamycin as a bridge induces ingestion of latex beads bound to the receptor. Rac1-mediated bead uptake depends on actin polymerisation since actin filaments accumulate at the bead/membrane binding sites and internalisation is inhibited by cytochalasin D. Internalisation is also abolished upon substitution of Phe37 to Leu in the Rac1 effector region. Our results indicate that by promoting actin polymerisation at particle attachment sites, Rac1 by acting through specific downstream effectors induces plasma membrane remodeling that allows particle internalisation in a membrane-enclosed phagosome.
Collapse
Affiliation(s)
- F Castellano
- Centre d'Immunologie INSERM-CNRS de Marseille-Luminy, France
| | | | | |
Collapse
|
39
|
Castellano F, Montcourrier P, Guillemot JC, Gouin E, Machesky L, Cossart P, Chavrier P. Inducible recruitment of Cdc42 or WASP to a cell-surface receptor triggers actin polymerization and filopodium formation. Curr Biol 1999; 9:351-60. [PMID: 10209117 DOI: 10.1016/s0960-9822(99)80161-4] [Citation(s) in RCA: 128] [Impact Index Per Article: 5.1] [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: 11/20/2022]
Abstract
BACKGROUND Cdc42, a GTP-binding protein of the Rho family, controls actin cytoskeletal organization and helps to generate actin-based protruding structures, such as filopodia. In vitro, Cdc42 regulates actin polymerization by facilitating the creation of free barbed ends - the more rapidly growing ends of actin filaments - and subsequent elongation at these ends. The Wiskott- Aldrich syndrome protein, WASP, which has a pleckstrin-homology domain and a Cdc42/Rac-binding motif, has been implicated in cell signaling and cytoskeleton reorganization. We have investigated the consequences of local recruitment of activated Cdc42 or WASP to the plasma membrane. RESULTS We used an activated Cdc42 protein that could be recruited to an engineered membrane receptor by adding rapamycin as a bridge, and added antibody-coupled beads to aggregate these receptors. Inducible recruitment of Cdc42 to clusters of receptors stimulated actin polymerization, resulting in the formation of membrane protrusions. Cdc42-induced protrusions were enriched in the vasodilator-stimulated phosphoprotein VASP and the focal-adhesion-associated proteins zyxin and ezrin. The Cdc42 effector WASP could also induce the formation of protrusions, albeit of different morphology. CONCLUSIONS This is the first demonstration that the local recruitment of activated Cdc42 or its downstream effector, WASP, to a membrane receptor in whole cells is sufficient to trigger actin polymerization that results in the formation of membrane protrusions. Our data suggest that Cdc42-induced actin-based protrusions result from the local and serial recruitment of cytoskeletal proteins including zyxin, VASP, and ezrin.
Collapse
Affiliation(s)
- F Castellano
- Centre d'Immunologie, INSERM-CNRS de Marseille-Luminy, 13288 Marseille Cedex 9, France
| | | | | | | | | | | | | |
Collapse
|
40
|
Lux R, Munasinghe VR, Castellano F, Lengeler JW, Corrie JE, Khan S. Elucidation of a PTS-carbohydrate chemotactic signal pathway in Escherichia coli using a time-resolved behavioral assay. Mol Biol Cell 1999; 10:1133-46. [PMID: 10198062 PMCID: PMC25240 DOI: 10.1091/mbc.10.4.1133] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Chemotaxis of Escherichia coli toward phosphotransferase systems (PTSs)-carbohydrates requires phosphoenolpyruvate-dependent PTSs as well as the chemotaxis response regulator CheY and its kinase, CheA. Responses initiated by flash photorelease of a PTS substrates D-glucose and its nonmetabolizable analog methyl alpha-D-glucopyranoside were measured with 33-ms time resolution using computer-assisted motion analysis. This, together with chemotactic mutants, has allowed us to map out and characterize the PTS chemotactic signal pathway. The responses were absent in mutants lacking the general PTS enzymes EI or HPr, elevated in PTS transport mutants, retarded in mutants lacking CheZ, a catalyst of CheY autodephosphorylation, and severely reduced in mutants with impaired methyl-accepting chemotaxis protein (MCP) signaling activity. Response kinetics were comparable to those triggered by MCP attractant ligands over most of the response range, the most rapid being 11.7 +/- 3.1 s-1. The response threshold was <10 nM for glucose. Responses to methyl alpha-D-glucopyranoside had a higher threshold, commensurate with a lower PTS affinity, but were otherwise kinetically indistinguishable. These facts provide evidence for a single pathway in which the PTS chemotactic signal is relayed rapidly to MCP-CheW-CheA signaling complexes that effect subsequent amplification and slower CheY dephosphorylation. The high sensitivity indicates that this signal is generated by transport-induced dephosphorylation of the PTS rather than phosphoenolpyruvate consumption.
Collapse
Affiliation(s)
- R Lux
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, New York 10461, USA
| | | | | | | | | | | |
Collapse
|
41
|
Moreno M, Manzanares C, Castellano F, Medina E, Urruzuno P, Camarena C, Manzanares J, Jara P. Monitoring of tacrolimus as rescue therapy in pediatric liver transplantation. Ther Drug Monit 1998; 20:376-9. [PMID: 9712459 DOI: 10.1097/00007691-199808000-00003] [Citation(s) in RCA: 13] [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: 11/26/2022]
Abstract
The introduction of tacrolimus as rescue therapy represents a significant advance in the prevention of late graft failure and second liver transplantation. The authors report the blood level monitoring of tacrolimus as a rescue therapy in 21 children who underwent liver transplantation, and they report the dose-concentration relationship in the presence or absence of hepatitis C virus (HCV) in these patients. This was a retrospective study conducted from May 1993 to January 1997. Indication for the conversion from cyclosporine (CsA) to tacrolimus were acute rejection (62%), chronic rejection (33%), and CsA toxicity (5%). Mean daily dose in the first month was 0.32 mg/kg, whereas at the end of the follow-up period it was 0.14 mg/kg. Tacrolimus mean whole blood concentration levels were between 7.1 ng/ml and 9.4 ng/ml, without significant differences over time. Mean daily doses in HCV+ and HCV- patients were 0.08 and 0.24 mg/kg, respectively (p < 0.01), and mean concentrations were 8.3 and 8.4 ng/ml (NS). HCV+ children required a mean dose three times lower than the dose used in HCV- children to obtain the same tacrolimus trough blood level. Therefore, doses in HCV+ children must be decreased to achieve levels within the therapeutic range.
Collapse
Affiliation(s)
- M Moreno
- Department of Biochemistry, University Hospital 12 de Octubre, Madrid, Spain
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Abstract
Rab GTPases are post-translationally modified by addition of geranylgeranyl moieties to carboxyl-terminal cysteine residues. For Rab proteins ending with xxCC xCxC and CCxx motifs this modification is catalysed by geranylgeranyltransferase type II (GGTaseII), and is entirely dependent on the Rab substrate being bound to Rab escort protein (REP). Several Rab proteins contain carboxyl-terminal CaaL prenylation motifs typical of members of the Rho family, which are modified in a REP-independent manner by geranylgeranyltransferase type I (GGTaseI). The present studies show that one such Rab protein (Rab8), which ends with a CVLL motif, is uniquely able to serve as a substrate for either REP/GGTaseII or GGTaseI in cell-free assays. The modification of Rab8 by GGTaseI did not require REP, indicating that a REP-induced conformational change is not essential for exposure of the Rab carboxyl-terminal cysteine prenylation site. To determine whether one enzyme plays a predominant role in Rab8 prenylation in vivo, the incorporation of [3H]mevalonate into Rab8 was measured in human embryonal kidney 293 cells under conditions where the activity of GGTaseI, but not GGTaseII, was blocked by the peptidomimetic inhibitor GGTI-298. The GGTaseI inhibitor did not prevent prenylation of either overexpressed Myc-tagged Rab8 or endogenous Rab8, whereas prenylation of a known GGTaseI substrate with the same carboxyl-terminal motif, Cdc42Hs, was completely blocked. To rule out the possibility that the apparent prenylation of Rab8 by GGTaseII occurs only when GGTaseI activity is eliminated, metabolic labelling studies were carried out in the absence of the GGTaseI inhibitor, using a REP-binding-deficient Rab8 construct (Y78D) that cannot serve as a substrate for GGTaseII, but is indistinguishable from wild-type Rab8 as a substrate for GGTaseI. Prenylation of the Y78D mutant was reduced by 60-70% in intact cells, consistent with the conclusion that the majority of Rab8 is prenylated by the REP/GGTaseII system in vivo.
Collapse
Affiliation(s)
- A L Wilson
- Hood Research Program, Weis Center for Research, Pennsylvania State University College of Medicine, 100 N. Academy Avenue, Danville, PA 17822-2616, USA
| | | | | | | |
Collapse
|
43
|
Mbayo K, Mbuyi-Muamba JM, Hallé L, Salmon D, Martageix C, Castellano F, Kaplan C, Lurhuma Z. HLA-DR gene frequencies in a Zaïrean population with particular reference to rheumatic diseases. Clin Rheumatol 1998; 17:105-9. [PMID: 9641505 DOI: 10.1007/bf01452254] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 11/24/2022]
Abstract
Epidemiological studies have shown that rheumatic diseases such as rheumatoid arthritis and systemic lupus erythematosus are uncommon in black Africans, and in this population the prevalence and the clinical features of these rheumatic diseases are variable. Environmental and genetic factors have been pointed out to explain this variability. In the present study, HLA-DR genes have been determined in a Zaïrean population in order to compare our results with those found elsewhere in other black populations of the same Bantu origin. Our results show that the frequency of HLA-DR1 is higher than in Nigerians, Zimbabweans and Xhosas, the decrease in Xhosas being statistically significant (p < 0.006). The HLA-DR3 frequency is higher in Zaïreans than in Nigerians but not significantly, while it is lower than in Xhosas (p < 0.003) and in Zimbabweans (not significant). The HLA-DR4 frequency is higher in Zaïreans than in Nigerians but it is lower than in Xhosas and Zimbabweans; the differences are not statistically significant. The HLA-DR8 frequency is lower in Zaïreans than in Nigerians while it is higher than in Xhosas (p < 0.002) and in Zimbabweans (not significant). These data suggest that genetic factors partly explain the clinical and epidemiological variability of rheumatic diseases in black Africans.
Collapse
Affiliation(s)
- K Mbayo
- Cliniques Universitaires de Kinshasa, Zaïre
| | | | | | | | | | | | | | | |
Collapse
|
44
|
McConlogue L, Castellano F, deWit C, Schenk D, Maltese WA. Differential effects of a Rab6 mutant on secretory versus amyloidogenic processing of Alzheimer's beta-amyloid precursor protein. J Biol Chem 1996; 271:1343-8. [PMID: 8576122 DOI: 10.1074/jbc.271.3.1343] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The Ras-related GTP-binding protein, Rab6, is localized in late Golgi compartments where it mediates intra-Golgi vesicular trafficking. Herein we report that coexpression of Alzheimer's beta-amyloid precursor protein (beta APP751) with a dominant-negative Rab6 mutant (Rab6N126I) in human embryonal kidney 293 cells causes an increase in secretion of the soluble amino-terminal exodomain (s-APP alpha) derived from non-amyloidogenic processing of beta-APP751 by alpha-secretase. The effect was specific to Rab6N126I, since the corresponding mutation in Rab8 (i.e. Rab8N121I), which has been implicated in protein transport to the plasma membrane, caused a modest reduction in s-APP alpha secretion. While Rab6N126I stimulated secretion of APP alpha, the accumulation of amyloid beta peptide (A beta) in the medium was either moderately reduced or unaffected. Similar differential effects of Rab6N126I on secretion of s-APP alpha versus A beta were observed in cell cultures that were overproducing A beta after transfection with a plasmid encoding Swedish variant of beta APP751. Moreover, assays of medium from the latter cultures revealed a marked increase in secretion of s-APP alpha relative to s-APP beta (the immediate product derived from cleavage of beta APP by beta-secretase). The results indicate that vesicular transport events controlled by Rab6 occur at or near a critical juncture in the trans-Golgi network where beta APP is sorted into either the constitutive alpha-secretase pathway or the amyloidogenic beta-secretase pathway.
Collapse
Affiliation(s)
- L McConlogue
- Athena Neurosciences, South San Francisco, California 94080, USA
| | | | | | | | | |
Collapse
|
45
|
Castellano F, Wilson AL, Maltese WA. Intracellular transport and maturation of nascent low density lipoprotein receptor is blocked by mutation in the Ras-related GTP-binding protein, RAB1B. J Recept Signal Transduct Res 1995; 15:847-62. [PMID: 8673720 DOI: 10.3109/10799899509049861] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The relationship between the Ras-related GTP-binding protein, Rab1B, and intracellular transport of nascent low density lipoprotein (LDL) receptor was studied in cultured human embryonic kidney cells (line 293) cotransfected with plasmids encoding the LDL-receptor and either wild-type Rab1B or a Rab1B mutant (N121I) known to act as a dominant suppressor of endogenous Rab1B function. [35S]Methionine pulse-chase analysis of immunoprecipitated LDL-receptor indicated that coexpression with Rab1BN121I, but not Rab1BWT, impaired its conversion from the Endo-H-sensitive 120-125 kDa form to the O-glycosylated 160-170 kDa form, consistent with a block in ER-->Golgi trafficking of the nascent receptor. In cells expressing Rab1BN121I, the newly synthesized LDL-receptor was unable to reach the cell surface as evidenced by its inaccessibility to sulfo-NHS-biotin added to the cultures. These observations provide a direct demonstration of Rab protein involvement in LDL receptor trafficking and lend support to the concept of Rab1B as a universal mediator of ER-->Golgi transport of membrane glycoproteins in mammalian cells.
Collapse
Affiliation(s)
- F Castellano
- Weis Center for Research, Geisinger Clinic, Danville, Pennsylvania 17822-2616, USA
| | | | | |
Collapse
|
46
|
Affiliation(s)
- L Halle
- Institut National de Transfusion Sanguine, Paris, France
| | | | | | | | | | | | | |
Collapse
|
47
|
Marcano V, Morales Méndez A, Castellano F, Salazar FJ, Martinez L. Occurrence of psilocybin and psilocin in Psilocybe pseudobullacea (Petch) Pegler from the Venezuelan Andes. J Ethnopharmacol 1994; 43:157-159. [PMID: 7967656 DOI: 10.1016/0378-8741(94)90013-2] [Citation(s) in RCA: 6] [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: 05/22/2023]
Abstract
Using thin-layer chromatographic and spectroscopic (UV) methods two Psilocybe species from the Venezuelan Andes were analysed for the hallucinogens psilocybin and psilocin. These species are: P. montana (Pers. ex Fr.) Kumm and P. pseudobullacea (Petch) Pegler. Both hallucinogens were found in P. pseudobullacea, while P. montana was found to be exempt of these compounds.
Collapse
Affiliation(s)
- V Marcano
- Programa para el Estudio de la Biodiversidad Andina, Fundación para el Desarrollo de la Ciencia y la Tecnología, Fundacite Merida, Venezuela
| | | | | | | | | |
Collapse
|
48
|
Abstract
During rat liver regeneration, at the onset of S-phase of the first cell cycle, an enhanced mevalonate incorporation into prenylated proteins is observed. The analysis of the lipid moieties of such proteins shows a 20-fold increased content of geraniol and farnesol. The expected increase of farnesylated and geranylgeranylated proteins in pre-S phase is confirmed by an increased level of lamin A, B, C and of several GTP-binding proteins. These results suggest a relevance of both farnesylation and geranylgeranylation in this phase of the cell cycle.
Collapse
Affiliation(s)
- G Bruscalupi
- Dipartimento di Biologia Cellulare e dello Sviluppo, Università La Sapienza, Roma, Italy
| | | | | | | |
Collapse
|
49
|
Castellano F, Bruscalupi G, Columba S, Di Croce L, Trentalance A, Augusti-Tocco G. Characterization of the response of growth and differentiation to lipoproteins and agents affecting cholesterol metabolism in murine neuroblastoma cells. Int J Dev Neurosci 1994; 12:77-84. [PMID: 8010162 DOI: 10.1016/0736-5748(94)90098-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 01/28/2023] Open
Abstract
Treatment with mevinolin, a competitive inhibitor of HMGCoAR, the key enzyme of isoprenoid metabolism, causes the arrest of proliferation and the differentiation of a neuroblastoma cell line (N18TG2). Mevalonate and high density lipoproteins partially restore growth. Cholesterol synthesis in the presence of mevinolin remains active, because in these cells the key enzyme HMG-CoA reductase is not completely inhibited by this drug. The fact that cell growth is reduced, while cholesterogenesis remains active, suggests that mevinolin acts by interfering with the synthesis of some unknown compound, other than cholesterol, which is necessary for proliferation.
Collapse
Affiliation(s)
- F Castellano
- Dipartimento di Biologia Cellulare e dello Sviluppo, Università La Sapienza, Roma, Italy
| | | | | | | | | | | |
Collapse
|
50
|
Abstract
Chemotactic excitation responses to caged ligand photorelease of rapidly swimming bacteria that reverse (Vibrio alginolyticus) or tumble (Escherichia coli and Salmonella typhimurium) have been measured by computer. Mutants were used to assess the effects of abnormal motility behavior upon signal processing times and test feasibility of kinetic analyses of the signaling pathway in intact bacteria. N-1-(2-Nitrophenyl)ethoxycarbonyl-L-serine and 2-hydroxyphenyl 1-(2-nitrophenyl) ethyl phosphate were synthesized. These compounds are a 'caged' serine and a 'caged' proton and on flash photolysis release serine and protons and attractant and repellent ligands, respectively, for Tsr, the serine receptor. The product quantum yield for serine was 0.65 (+/- 0.05) and the rate of serine release was proportional to [H+] near-neutrality with a rate constant of 17 s-1 at pH 7.0 and 21 degrees C. The product quantum yield for protons was calculated to be 0.095 on 308-nm irradiation but 0.29 (+/- 0.02) on 300-350-nm irradiation, with proton release occurring at > 10(5) s-1. The pH jumps produced were estimated using pH indicators, the pH-dependent decay of the chromophoric aci-nitro intermediate and bioassays. Receptor deletion mutants did not respond to photorelease of the caged ligands. Population responses occurred without measurable latency. Response times increased with decreased stimulus strength. Physiological or genetic perturbation of motor rotation bias leading to increased tumbling reduced response sensitivity but did not affect response times. Exceptions were found. A CheR-CheB mutant strain had normal motility, but reduced response. A CheZ mutant had tumbly motility, reduced sensitivity, and increased response time to attractant, but a normal repellent response. These observations are consistent with current ideas that motor interactions with a single parameter, namely phosphorylated CheY protein, dictate motor response to both attractant and repellent stimuli. Inverse motility motor mutants with extreme rotation bias exhibited the greatest reduction in response sensitivity but, nevertheless, had normal attractant response times. This implies that control of CheY phosphate concentration rather than motor reactions limits responses to attractants.
Collapse
Affiliation(s)
- S Khan
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, New York 10461
| | | | | | | | | | | | | |
Collapse
|