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  1. Article ; Online: Phosphoproteomic analysis identifies supervillin as an ERK3 substrate regulating cytokinesis and cell ploidy.

    Javary, Joaquim / Goupil, Eugénie / Soulez, Mathilde / Kanshin, Evgeny / Bouchard, Antoine / Seternes, Ole-Morten / Thibault, Pierre / Labbé, Jean-Claude / Meloche, Sylvain

    Journal of cellular physiology

    2022  Volume 239, Issue 3, Page(s) e30938

    Abstract: Extracellular signal-regulated kinase 3 (ERK3) is a poorly characterized member of the mitogen-activated protein (MAP) kinase family. Functional analysis of the ERK3 signaling pathway has been hampered by a lack of knowledge about the substrates and ... ...

    Abstract Extracellular signal-regulated kinase 3 (ERK3) is a poorly characterized member of the mitogen-activated protein (MAP) kinase family. Functional analysis of the ERK3 signaling pathway has been hampered by a lack of knowledge about the substrates and downstream effectors of the kinase. Here, we used large-scale quantitative phosphoproteomics and targeted gene silencing to identify direct ERK3 substrates and gain insight into its cellular functions. Detailed validation of one candidate substrate identified the gelsolin/villin family member supervillin (SVIL) as a bona fide ERK3 substrate. We show that ERK3 phosphorylates SVIL on Ser245 to regulate myosin II activation and cytokinesis completion in dividing cells. Depletion of SVIL or ERK3 leads to increased cytokinesis failure and multinucleation, a phenotype rescued by wild type SVIL but not by the non-phosphorylatable S245A mutant. Our results unveil a new function of the atypical MAP kinase ERK3 in cell division and the regulation of cell ploidy.
    MeSH term(s) Cytokinesis/genetics ; Mitogen-Activated Protein Kinase 6/metabolism ; Signal Transduction ; Phosphorylation ; Membrane Proteins/genetics ; Membrane Proteins/metabolism ; Microfilament Proteins/genetics ; Microfilament Proteins/metabolism ; Myosin Type II/metabolism ; Humans ; HEK293 Cells ; Animals ; Proteomics
    Chemical Substances Mitogen-Activated Protein Kinase 6 (EC 2.7.11.24) ; SVIL protein, human ; Membrane Proteins ; Microfilament Proteins ; Myosin Type II (EC 3.6.1.-)
    Language English
    Publishing date 2022-12-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3116-1
    ISSN 1097-4652 ; 0021-9541
    ISSN (online) 1097-4652
    ISSN 0021-9541
    DOI 10.1002/jcp.30938
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: ICOS costimulation is indispensable for the differentiation of T follicular regulatory cells.

    Panneton, Vincent / Mindt, Barbara C / Bouklouch, Yasser / Bouchard, Antoine / Mohammaei, Saba / Chang, Jinsam / Diamantopoulos, Nikoletta / Witalis, Mariko / Li, Joanna / Stancescu, Albert / Bradley, John E / Randall, Troy D / Fritz, Jörg H / Suh, Woong-Kyung

    Life science alliance

    2023  Volume 6, Issue 4

    Abstract: ICOS is a T-cell costimulatory receptor critical for Tfh cell generation and function. However, the role of ICOS in Tfr cell differentiation remains unclear. Using Foxp3-Cre-mediated ICOS knockout (ICOS FC) mice, we show that ICOS deficiency in Treg- ... ...

    Abstract ICOS is a T-cell costimulatory receptor critical for Tfh cell generation and function. However, the role of ICOS in Tfr cell differentiation remains unclear. Using Foxp3-Cre-mediated ICOS knockout (ICOS FC) mice, we show that ICOS deficiency in Treg-lineage cells drastically reduces the number of Tfr cells during GC reactions but has a minimal impact on conventional Treg cells. Single-cell transcriptome analysis of Foxp3
    MeSH term(s) Animals ; Mice ; T-Lymphocytes, Regulatory/metabolism ; Germinal Center ; B-Lymphocytes ; Cell Differentiation/genetics ; Forkhead Transcription Factors/genetics ; Forkhead Transcription Factors/metabolism ; Inducible T-Cell Co-Stimulator Protein/genetics ; Inducible T-Cell Co-Stimulator Protein/metabolism
    Chemical Substances Forkhead Transcription Factors ; Icos protein, mouse ; Inducible T-Cell Co-Stimulator Protein
    Language English
    Publishing date 2023-02-08
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 2575-1077
    ISSN (online) 2575-1077
    DOI 10.26508/lsa.202201615
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: RNF13 Dileucine Motif Variants L311S and L312P Interfere with Endosomal Localization and AP-3 Complex Association.

    Cabana, Valérie C / Bouchard, Antoine Y / Sénécal, Audrey M / Ghilarducci, Kim / Kourrich, Saïd / Cappadocia, Laurent / Lussier, Marc P

    Cells

    2021  Volume 10, Issue 11

    Abstract: Developmental and epileptic encephalopathies (DEE) are rare and serious neurological disorders characterized by severe epilepsy with refractory seizures and a significant developmental delay. Recently, DEE73 was linked to genetic alterations of the RNF13 ...

    Abstract Developmental and epileptic encephalopathies (DEE) are rare and serious neurological disorders characterized by severe epilepsy with refractory seizures and a significant developmental delay. Recently, DEE73 was linked to genetic alterations of the RNF13 gene, which convert positions 311 or 312 in the RNF13 protein from leucine to serine or proline, respectively (L311S and L312P). Using a fluorescence microscopy approach to investigate the molecular and cellular mechanisms affected by RNF13 protein variants, the current study shows that wild-type RNF13 localizes extensively with endosomes and lysosomes, while L311S and L312P do not extensively colocalize with the lysosomal marker Lamp1. Our results show that RNF13 L311S and L312P proteins affect the size of endosomal vesicles along with the temporal and spatial progression of fluorescently labeled epidermal growth factor, but not transferrin, in the endolysosomal system. Furthermore, GST-pulldown and co-immunoprecipitation show that RNF13 variants disrupt association with AP-3 complex. Knockdown of AP-3 complex subunit AP3D1 alters the lysosomal localization of wild-type RNF13 and similarly affects the size of endosomal vesicles. Importantly, our study provides a first step toward understanding the cellular and molecular mechanism altered by DEE73-associated genetic variations of RNF13.
    MeSH term(s) Adaptor Protein Complex 3/metabolism ; Amino Acid Motifs ; Endosomes/metabolism ; Epidermal Growth Factor/metabolism ; Gene Expression Regulation ; HEK293 Cells ; HeLa Cells ; Humans ; Lysosomes/metabolism ; Mutant Proteins/chemistry ; Mutant Proteins/metabolism ; Protein Binding ; Transferrin/metabolism ; Ubiquitin-Protein Ligases/chemistry ; Ubiquitin-Protein Ligases/genetics ; Ubiquitin-Protein Ligases/metabolism
    Chemical Substances Adaptor Protein Complex 3 ; Mutant Proteins ; Transferrin ; Epidermal Growth Factor (62229-50-9) ; RNF13 protein, human (EC 2.3.2.27) ; Ubiquitin-Protein Ligases (EC 2.3.2.27)
    Language English
    Publishing date 2021-11-06
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2661518-6
    ISSN 2073-4409 ; 2073-4409
    ISSN (online) 2073-4409
    ISSN 2073-4409
    DOI 10.3390/cells10113063
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: An Assessment of Demand for a Combined PharmD-MBA Program at the University of Saskatchewan.

    Mansell, Kerry / Bruneau-Bouchard, Antoine / Bruni-Bossio, Vincent

    Pharmacy (Basel, Switzerland)

    2016  Volume 4, Issue 2

    Abstract: 1) Background: Combined MBA programs are becoming increasingly popular, and it is anticipated that there will be 60 combined pharmacy-MBA programs across North America in 2015. We aimed to see if there would be support for a combined PharmD-MBA program ... ...

    Abstract (1) Background: Combined MBA programs are becoming increasingly popular, and it is anticipated that there will be 60 combined pharmacy-MBA programs across North America in 2015. We aimed to see if there would be support for a combined PharmD-MBA program at the University of Saskatchewan. (2) Methods: A questionnaire was distributed to 1st, 2nd, and 3rd year pharmacy students at the University of Saskatchewan. A separate questionnaire was developed and all practicing pharmacists in Saskatchewan were emailed a link to SurveyMonkey
    Language English
    Publishing date 2016-05-13
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2737194-3
    ISSN 2226-4787 ; 2226-4787
    ISSN (online) 2226-4787
    ISSN 2226-4787
    DOI 10.3390/pharmacy4020020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: ICOS-Deficient Regulatory T Cells Can Prevent Spontaneous Autoimmunity but Are Impaired in Controlling Acute Inflammation.

    Chang, Jinsam / Bouchard, Antoine / Bouklouch, Yasser / Panneton, Vincent / Li, Joanna / Diamantopoulos, Nikoletta / Mohammaei, Saba / Istomine, Roman / Alvarez, Fernando / Piccirillo, Ciriaco A / Suh, Woong-Kyung

    Journal of immunology (Baltimore, Md. : 1950)

    2022  Volume 209, Issue 2, Page(s) 301–309

    Abstract: ICOS is induced in activated T cells and its main role is to boost differentiation and function of effector T cells. ICOS is also constitutively expressed in a subpopulation of ... ...

    Abstract ICOS is induced in activated T cells and its main role is to boost differentiation and function of effector T cells. ICOS is also constitutively expressed in a subpopulation of Foxp3
    MeSH term(s) Animals ; Autoimmunity ; Forkhead Transcription Factors/metabolism ; Inducible T-Cell Co-Stimulator Protein/metabolism ; Inflammation/metabolism ; Mice ; T-Lymphocytes, Regulatory
    Chemical Substances Forkhead Transcription Factors ; Icos protein, mouse ; Inducible T-Cell Co-Stimulator Protein
    Language English
    Publishing date 2022-06-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3056-9
    ISSN 1550-6606 ; 0022-1767 ; 1048-3233 ; 1047-7381
    ISSN (online) 1550-6606
    ISSN 0022-1767 ; 1048-3233 ; 1047-7381
    DOI 10.4049/jimmunol.2100897
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Hippo Signal Transduction Mechanisms in T Cell Immunity.

    Bouchard, Antoine / Witalis, Mariko / Chang, Jinsam / Panneton, Vincent / Li, Joanna / Bouklouch, Yasser / Suh, Woong-Kyung

    Immune network

    2020  Volume 20, Issue 5, Page(s) e36

    Abstract: Hippo signaling pathways are evolutionarily conserved signal transduction mechanisms mainly involved in organ size control, tissue regeneration, and tumor suppression. However, in mammals, the primary role of Hippo signaling seems to be regulation of ... ...

    Abstract Hippo signaling pathways are evolutionarily conserved signal transduction mechanisms mainly involved in organ size control, tissue regeneration, and tumor suppression. However, in mammals, the primary role of Hippo signaling seems to be regulation of immunity. As such, humans with null mutations in
    Language English
    Publishing date 2020-10-19
    Publishing country Korea (South)
    Document type Journal Article ; Review
    ZDB-ID 2536191-0
    ISSN 2092-6685 ; 1598-2629
    ISSN (online) 2092-6685
    ISSN 1598-2629
    DOI 10.4110/in.2020.20.e36
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  7. Article ; Online: Surgical support during the terrorist attacks in Paris, November 13, 2015: Experience at Bégin Military Teaching Hospital.

    Barbier, Olivier / Malgras, Brice / Choufani, Camille / Bouchard, Antoine / Ollat, Didier / Versier, Gilbert

    The journal of trauma and acute care surgery

    2017  Volume 82, Issue 6, Page(s) 1122–1128

    Abstract: Background: Recent conflicts have allowed the French Army Health Service to improve management quality for wartime-injured people during military operations. On November 13, 2015, it was in Paris that France was directly attacked and Bégin Military ... ...

    Abstract Background: Recent conflicts have allowed the French Army Health Service to improve management quality for wartime-injured people during military operations. On November 13, 2015, it was in Paris that France was directly attacked and Bégin Military Teaching Hospital, like several hospitals in Paris, had to face a large number of gunshot victims. Thanks to our operational experience, injured people hospitalized in military hospitals benefited from a management based on triage and damage control (DC) principles.
    Methods: Forty-five patients were taken care of in our hospital with an average age of 32 years. During triage, eight patients were categorized T1 (with four extreme emergencies) and 10 were classified T2 and 27 as T3. Twenty-two patients underwent emergency surgery, 15 for soft tissue lesions of limbs, 8 for ballistic fractures (one of which was a cervical wound), and 5 for abdominal wounds. Two patients classified T1 died early.
    Results: In total, more than 50 operations were performed including iterative debridements, bone fixation, three amputations, and two flaps. After 9 months, all of the patients had healed. One woman with limb stiffness required an arthrolysis.
    Conclusion: This event showed that terrorist attacks and mass casualties with war wounds can occur in France. Acquired experience regarding war wounds by the French Army Health Service is precious. Everyone must understand the importance of triage and the principles of damage control. Every hospital must be ready to face this type of massive influx of injured people (white plan).
    Level of evidence: Epidemiological study, level V.
    MeSH term(s) Adult ; Female ; Hospitals, Military ; Hospitals, Teaching ; Humans ; Male ; Mass Casualty Incidents ; Paris ; Terrorism ; Treatment Outcome ; Triage ; Wounds, Gunshot/surgery
    Language English
    Publishing date 2017-03-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2651070-4
    ISSN 2163-0763 ; 2163-0755
    ISSN (online) 2163-0763
    ISSN 2163-0755
    DOI 10.1097/TA.0000000000001461
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Optimization of femtosecond laser-constructed clear corneal wound sealability for cataract surgery.

    Benard-Seguin, Étienne / Bostan, Cristina / Fadous, Raphaëlle / Sylvestre-Bouchard, Antoine / de Alwis Weerasekera, Hasitha Jaliya / Giguère, Charles-Édouard / Harasymowycz, Paul / Brunette, Isabelle

    Journal of cataract and refractive surgery

    2020  Volume 46, Issue 12, Page(s) 1611–1617

    Abstract: Purpose: To compare the sealability of femtosecond laser (FSL)-assisted corneal incisions (CIs) with that of triplanar manual (M)-CIs and to determine FSL wound parameters minimizing leakage.: Setting: Private practice.: Design: Phase IV, single- ... ...

    Abstract Purpose: To compare the sealability of femtosecond laser (FSL)-assisted corneal incisions (CIs) with that of triplanar manual (M)-CIs and to determine FSL wound parameters minimizing leakage.
    Setting: Private practice.
    Design: Phase IV, single-surgeon, retrospective cohort study.
    Methods: One eye per patient was included. Two groups defined by the main wound (FSL-CI or M-CI) were compared for leakage, inferred by placement of a suture at the end of surgery. Leakage in FSL-CIs was analyzed as a function of customizable wound parameters: anterior plane depth (APD), posterior plane depth (PPD), anterior side-cut angle (ASCA), and posterior side-cut angle (PSCA). The risk of leakage of FSL-CIs with optimal and nonoptimal parameters was further compared with that of M-CIs.
    Results: A total of 1100 eyes (757 [68.8%] FSL-CI; 343 [31.2%] M-CI) were included. Wound leakage occurred in 133 FSL-CI (17.6%) and 30 M-CI eyes (8.7%) (P < .001). FSL wound parameters associated with the lowest risk of leakage were 60% APD, 70% PPD, 120 degrees ASCA, and 70 degrees PSCA. FSL-CIs constructed with at least 3 optimal parameters (60% APD, 70% PPD, and 120 degrees ASCA) had a similar risk of leakage to M-CIs (odds ratio [OR], 1.1; 95% CI, 0.5-2.3). FSL-CIs with suboptimal parameters had twice the risk of leakage of M-CIs (OR, 2.0; 95% CI, 1.1-3.8).
    Conclusions: Overall, FSL-CIs leaked more than M-CIs. However, FSL-CIs with optimized wound profiles had an equivalent risk of leakage to M-CIs. Wound parameter customization is an asset of FSL technology that allows optimization of FSL-CI sealability.
    Language English
    Publishing date 2020-07-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 632744-8
    ISSN 1873-4502 ; 0886-3350
    ISSN (online) 1873-4502
    ISSN 0886-3350
    DOI 10.1097/j.jcrs.0000000000000336
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: The arthroscopic Latarjet procedure for the treatment of anterior shoulder instability.

    Lafosse, Laurent / Lejeune, Etienne / Bouchard, Antoine / Kakuda, Carlos / Gobezie, Reuben / Kochhar, Tony

    Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association

    2007  Volume 23, Issue 11, Page(s) 1242.e1–5

    Abstract: Anterior instability is a difficult clinical problem that is treated by a variety of open and arthroscopic methods with good results. Bankart repair remains a popular option. However, in those situations involving irreparable ligamentous damage or bony ... ...

    Abstract Anterior instability is a difficult clinical problem that is treated by a variety of open and arthroscopic methods with good results. Bankart repair remains a popular option. However, in those situations involving irreparable ligamentous damage or bony deficiency, this technique may be insufficient to stabilize the shoulder. One of the principal methods of open treatment for this problem is the Latarjet procedure, as described in his article in 1954. It has proven to be a durable and reliable method of treatment for anteroinferior instability of the glenohumeral joint. Several authors have reported on the long-term outcomes of this procedure with satisfactory results. There has been no previous description of the Latarjet procedure being performed arthroscopically. We present the first report of a new surgical technique, the arthroscopic Latarjet procedure. This procedure is fully arthroscopic and combines the advantages of the open procedure with those of arthroscopic stabilization. This is a significant step forward in the development of arthroscopic shoulder reconstruction and enables shoulder surgeons to treat all cases of instability arthroscopically.
    MeSH term(s) Arthroscopy/methods ; Bone Screws ; Bone Transplantation ; Bone Wires ; Humans ; Joint Instability/surgery ; Osteotomy ; Shoulder Joint/surgery
    Language English
    Publishing date 2007-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 632528-2
    ISSN 1526-3231 ; 0749-8063
    ISSN (online) 1526-3231
    ISSN 0749-8063
    DOI 10.1016/j.arthro.2007.06.008
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  10. Article: Molecular definition of an in vitro niche for dendritic cell development.

    Despars, Geneviève / Ni, Keping / Bouchard, Antoine / O'Neill, Terence J / O'Neill, Helen C

    Experimental hematology

    2004  Volume 32, Issue 12, Page(s) 1182–1193

    Abstract: Objective: Although dendritic cell (DC) precursors have been isolated from many lymphoid sites, the regulation and location of early DC development is still poorly understood. Here we describe a splenic microenvironment that supports DC hematopoiesis in ...

    Abstract Objective: Although dendritic cell (DC) precursors have been isolated from many lymphoid sites, the regulation and location of early DC development is still poorly understood. Here we describe a splenic microenvironment that supports DC hematopoiesis in vitro and identify gene expression specific for that niche.
    Methods: The DC supportive function of the STX3 splenic stroma and the lymph node-derived 2RL22 stroma for overlaid bone marrow cells was assessed by coculture over 2 weeks. The DC supportive function of SXT3 was identified in terms of specific gene expression in STX3 and not 2RL22 using Affymetrix microchips.
    Results: STX3 supports DC differentiation from overlaid bone marrow precursors while 2RL22 does not. A dataset of 154 genes specifically expressed in STX3 and not 2RL22 was retrieved from Affymetrix results. Functional annotation has led to selection of 26 genes as candidate regulators of the microenvironment supporting DC hematopoiesis. Specific expression of 14 of these genes in STX3 and not 2RL22 was confirmed by reverse transcription-polymerase chain reaction.
    Conclusion: Some genes specifically expressed in STX3 have been previously associated with hematopoietic stem cell niches. A high proportion of genes encode growth factors distinct from those commonly used for in vitro development of DC from precursors. Potential regulators of a DC microenvironment include genes involved in angiogenesis, hematopoiesis, and development, not previously linked to DC hematopoiesis.
    MeSH term(s) Animals ; Bone Marrow Cells/cytology ; Bone Marrow Cells/physiology ; Cell Differentiation/genetics ; Cell Differentiation/physiology ; Cells, Cultured ; Coculture Techniques ; Dendritic Cells/physiology ; Gene Expression Profiling ; Gene Expression Regulation/genetics ; Gene Expression Regulation/physiology ; Hematopoiesis/genetics ; Hematopoiesis/physiology ; Lymph Nodes/cytology ; Lymph Nodes/physiology ; Mice ; Neovascularization, Physiologic/genetics ; Neovascularization, Physiologic/physiology ; Oligonucleotide Array Sequence Analysis ; Spleen/cytology ; Spleen/physiology ; Stromal Cells/cytology ; Stromal Cells/physiology
    Language English
    Publishing date 2004-12
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 185107-x
    ISSN 1873-2399 ; 0301-472X ; 0531-5573
    ISSN (online) 1873-2399
    ISSN 0301-472X ; 0531-5573
    DOI 10.1016/j.exphem.2004.08.013
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