1
|
Kastner P, Aukenova A, Chan S. Evolution of the Ikaros family transcription factors: From a deuterostome ancestor to humans. Biochem Biophys Res Commun 2024; 694:149399. [PMID: 38134477 DOI: 10.1016/j.bbrc.2023.149399] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 12/17/2023] [Indexed: 12/24/2023]
Abstract
Ikaros family proteins (Ikaros, Helios, Aiolos, Eos) are zinc finger transcription factors essential for the development and function of the adaptive immune system. They also control developmental events in neurons and other cell types, suggesting that they possess crucial functions across disparate cell types. These functions are likely shared among the organisms in which these factors exist, and it is thus important to obtain a view of their distribution and conservation across organisms. How this family evolved remains poorly understood. Here we mined protein, mRNA and DNA databases to identify proteins with DNA-binding domains homologous to that of Ikaros. We show that Ikaros-related proteins exist in organisms from all four deuterostome phyla (chordates, echinoderms, hemichordates, xenacoelomorpha), but not in more distant groups. While most non-vertebrates have a single family member, this family grew to six members in the acoel worm Hofstenia miamia, three in jawless and four in jawed vertebrates. Most residues involved in DNA contact from zinc fingers 2 to 4 were identical across the Ikaros family, suggesting conserved mechanisms for target sequence recognition. Further, we identified a novel KRKxxxPxK/R motif that inhibits DNA binding in vitro which was conserved across the deuterostome phyla. We also identified a EψψxxxψM(D/E)QAIxxAIxYLGA(D/E)xL motif conserved among human Ikaros, Aiolos, Helios and subsets of chordate proteins, and motifs that are specific to subsets of vertebrate family members. Some of these motifs are targets of mutations in human patients. Finally we show that the atypical family member Pegasus emerged only in vertebrates, which is consistent with its function in bone. Our data provide a novel evolutionary perspective for Ikaros family proteins and suggest that they have conserved regulatory functions across deuterostomes.
Collapse
Affiliation(s)
- Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), ILLKIRCH, France; Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, ILLKIRCH, France; Centre National de la Recherche Scientifique (CNRS), UMR7104, ILLKIRCH, France; Université de Strasbourg, ILLKIRCH, France; Faculté de Médecine, Université de Strasbourg, Strasbourg, France.
| | - Adina Aukenova
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), ILLKIRCH, France; Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, ILLKIRCH, France; Centre National de la Recherche Scientifique (CNRS), UMR7104, ILLKIRCH, France; Université de Strasbourg, ILLKIRCH, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), ILLKIRCH, France; Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, ILLKIRCH, France; Centre National de la Recherche Scientifique (CNRS), UMR7104, ILLKIRCH, France; Université de Strasbourg, ILLKIRCH, France.
| |
Collapse
|
2
|
Sin JH, Sucharov J, Kashyap S, Wang Y, Proekt I, Liu X, Parent AV, Gupta A, Kastner P, Chan S, Gardner JM, Ntranos V, Miller CN, Anderson MS, Schjerven H, Waterfield MR. Ikaros is a principal regulator of Aire + mTEC homeostasis, thymic mimetic cell diversity, and central tolerance. Sci Immunol 2023; 8:eabq3109. [PMID: 37889983 DOI: 10.1126/sciimmunol.abq3109] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 10/04/2023] [Indexed: 10/29/2023]
Abstract
Mutations in the gene encoding the zinc-finger transcription factor Ikaros (IKZF1) are found in patients with immunodeficiency, leukemia, and autoimmunity. Although Ikaros has a well-established function in modulating gene expression programs important for hematopoietic development, its role in other cell types is less well defined. Here, we uncover functions for Ikaros in thymic epithelial lineage development in mice and show that Ikzf1 expression in medullary thymic epithelial cells (mTECs) is required for both autoimmune regulator-positive (Aire+) mTEC development and tissue-specific antigen (TSA) gene expression. Accordingly, TEC-specific deletion of Ikzf1 in mice results in a profound decrease in Aire+ mTECs, a global loss of TSA gene expression, and the development of autoimmunity. Moreover, Ikaros shapes thymic mimetic cell diversity, and its deletion results in a marked expansion of thymic tuft cells and muscle-like mTECs and a loss of other Aire-dependent mimetic populations. Single-cell analysis reveals that Ikaros modulates core transcriptional programs in TECs that correlate with the observed cellular changes. Our findings highlight a previously undescribed role for Ikaros in regulating epithelial lineage development and function and suggest that failed thymic central tolerance could contribute to the autoimmunity seen in humans with IKZF1 mutations.
Collapse
Affiliation(s)
- Jun Hyung Sin
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA, USA
- Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Juliana Sucharov
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA, USA
| | - Sujit Kashyap
- Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Yi Wang
- Diabetes Center, University of California San Francisco, San Francisco, CA, USA
- 10x Genomics, Pleasanton, CA, USA
| | - Irina Proekt
- Diabetes Center, University of California San Francisco, San Francisco, CA, USA
| | - Xian Liu
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA, USA
- Diabetes Center, University of California San Francisco, San Francisco, CA, USA
| | - Audrey V Parent
- Diabetes Center, University of California San Francisco, San Francisco, CA, USA
| | - Alexander Gupta
- Diabetes Center, University of California San Francisco, San Francisco, CA, USA
- Department of Surgery, University of California San Francisco, San Francisco, CA, USA
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U 1258, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U 1258, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - James M Gardner
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA, USA
- Diabetes Center, University of California San Francisco, San Francisco, CA, USA
- Department of Surgery, University of California San Francisco, San Francisco, CA, USA
| | - Vasilis Ntranos
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA, USA
- Diabetes Center, University of California San Francisco, San Francisco, CA, USA
| | - Corey N Miller
- Diabetes Center, University of California San Francisco, San Francisco, CA, USA
| | - Mark S Anderson
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA, USA
- Diabetes Center, University of California San Francisco, San Francisco, CA, USA
- Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Hilde Schjerven
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA, USA
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Michael R Waterfield
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, CA, USA
- Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| |
Collapse
|
3
|
Polak K, Marchal P, Taroni C, Ebel C, Kirstetter P, Kastner P, Chan S. CD4 + regulatory T cells lacking Helios and Eos. Biochem Biophys Res Commun 2023; 674:83-89. [PMID: 37413709 DOI: 10.1016/j.bbrc.2023.06.087] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 06/27/2023] [Indexed: 07/08/2023]
Abstract
The transcriptional regulators that drive regulatory T (Treg) cell development and function remain partially understood. Helios (Ikzf2) and Eos (Ikzf4) are closely-related members of the Ikaros family of transcription factors. They are highly expressed in CD4+ Treg cells and functionally important for Treg cell biology, as mice deficient for either Helios or Eos are susceptible to autoimmune diseases. However, it remains unknown if these factors exhibit specific or partially redundant functions in Treg cells. Here we show that mice with germline deletions of both Ikzf2 and Ikzf4 are not very different from animals with single Ikzf2 or Ikzf4 deletions. Double knockout Treg cells differentiate normally, and efficiently suppress effector T cell proliferation in vitro. Both Helios and Eos are required for optimal Foxp3 protein expression. Surprisingly, Helios and Eos regulate different, largely non-overlapping, sets of genes. Only Helios is required for proper Treg cell aging, as Helios deficiency results in reduced Treg cell frequencies in the spleen of older animals. These results indicate that Helios and Eos are required for distinct aspects of Treg cell function.
Collapse
Affiliation(s)
- Katarzyna Polak
- Université de Strasbourg, IGBMC UMR 7104- UMR-S 1258, F-67400 Illkirch, France; CNRS, UMR 7104, F-67400 Illkirch, France; Inserm, UMR-S 1258, F-67400 Illkirch, France; IGBMC, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67400 Illkirch, France
| | - Patricia Marchal
- Université de Strasbourg, IGBMC UMR 7104- UMR-S 1258, F-67400 Illkirch, France; CNRS, UMR 7104, F-67400 Illkirch, France; Inserm, UMR-S 1258, F-67400 Illkirch, France; IGBMC, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67400 Illkirch, France
| | - Chiara Taroni
- Université de Strasbourg, IGBMC UMR 7104- UMR-S 1258, F-67400 Illkirch, France; CNRS, UMR 7104, F-67400 Illkirch, France; Inserm, UMR-S 1258, F-67400 Illkirch, France; IGBMC, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67400 Illkirch, France
| | - Claudine Ebel
- Université de Strasbourg, IGBMC UMR 7104- UMR-S 1258, F-67400 Illkirch, France; CNRS, UMR 7104, F-67400 Illkirch, France; Inserm, UMR-S 1258, F-67400 Illkirch, France; IGBMC, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67400 Illkirch, France; Flow Cytometry Service, IGBMC, Illkirch, France
| | - Peggy Kirstetter
- Université de Strasbourg, IGBMC UMR 7104- UMR-S 1258, F-67400 Illkirch, France; CNRS, UMR 7104, F-67400 Illkirch, France; Inserm, UMR-S 1258, F-67400 Illkirch, France; IGBMC, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67400 Illkirch, France
| | - Philippe Kastner
- Université de Strasbourg, IGBMC UMR 7104- UMR-S 1258, F-67400 Illkirch, France; CNRS, UMR 7104, F-67400 Illkirch, France; Inserm, UMR-S 1258, F-67400 Illkirch, France; IGBMC, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67400 Illkirch, France; Faculté de Médecine, Université de Strasbourg, Strasbourg, France.
| | - Susan Chan
- Université de Strasbourg, IGBMC UMR 7104- UMR-S 1258, F-67400 Illkirch, France; CNRS, UMR 7104, F-67400 Illkirch, France; Inserm, UMR-S 1258, F-67400 Illkirch, France; IGBMC, Institut de Génétique et de Biologie Moléculaire et Cellulaire, F-67400 Illkirch, France.
| |
Collapse
|
4
|
Hennings E, Blum S, Aeschbacher S, Coslovsky M, Knecht S, Paladini RE, Krisai P, Kastner P, Ziegler A, Mueller C, Zuern CS, Bonati L, Conen D, Kuehne M, Osswald S. Bone morphogenetic protein 10 as predictor for adverse outcomes in patients with atrial fibrillation. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.515] [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: 11/14/2022] Open
Abstract
Abstract
Background
Patients with atrial fibrillation (AF) face an increased risk of death and major adverse cardiovascular events (MACE). Bone morphogenetic protein 10 (BMP10) is a novel atrial-specific biomarker, but data about its prognostic value in AF patients are lacking.
Purpose
We aimed to assess the predictive value of BMP10 for death and MACE in AF patients in comparison to N-terminal prohormone of B-type natriuretic peptide (NT-proBNP).
Methods
Baseline concentrations of BMP10 and NT-proBNP were measured in stable patients with AF enrolled in Swiss-AF, a prospective multicenter observational cohort study. Primary outcomes were all-cause death and MACE (composite of heart failure hospitalization, cardiovascular death, stroke, systemic embolism, myocardial infarction). Measures of discriminative power were used to compare multivariable Cox proportional hazard models using the different biomarkers.
Results
A total of 2219 AF patients were included with a median follow-up of 4.3 years (IQR 3.9, 5.1). Mean age was 73±9 years and 27% were women. Incidence rate per 100 patient-years of all-cause death and MACE increased across BMP10 quartiles (Figure 1). In the multivariable adjusted Cox proportional hazard model, the hazard ratio (HR) and 95% confidence interval (CI) of BMP10 was 1.60 (1.37; 1.87) to predict all-cause death, and 1.54 (1.35; 1.76) to predict MACE. For all-cause death, the C-index (95% CI) was 0.783 (0.763; 0.809) for BMP10, 0.784 (0.765; 0.810) for NT-proBNP, and 0.789 (0.771; 0.815) for both biomarkers combined. For MACE, the C-index (95% CI) was 0.732 (0.715; 0.754) for BMP10, 0.747 (0.731; 0.768) for NT-proBNP, and 0.750 (0.734; 0.771) for both biomarkers combined. When grouping patients according to clinical used NT-proBNP categories (<300, 300–900, >900 ng/l), higher incidence rates and adjusted HRs were observed for the primary outcomes in patients with high BMP10 in the categories of low NT-proBNP (all-cause death aHR 2.28 [1.15; 4.52], MACE aHR 1.88 [1.07; 3.28]) and high NT-proBNP (all-cause death aHR 1.61 [1.14; 2.26], MACE aHR 1.38 [1.07; 1.80]) (Figure 2).
Conclusion
The novel atrial-specific biomarker BMP10 strongly predicts all-cause death and MACE in patients with AF. BMP10 provides additional prognostic information in low- and high-risk patients according to NT-proBNP stratification.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Swiss National Science Foundation, Swiss Heart Foundation
Collapse
Affiliation(s)
- E Hennings
- University Hospital Basel , Basel , Switzerland
| | - S Blum
- University Hospital Basel , Basel , Switzerland
| | | | - M Coslovsky
- University Hospital Basel , Basel , Switzerland
| | - S Knecht
- University Hospital Basel , Basel , Switzerland
| | | | - P Krisai
- University Hospital Basel , Basel , Switzerland
| | - P Kastner
- Roche Diagnostics GmbH , Penzberg , Germany
| | - A Ziegler
- Roche Diagnostics International AG , Rotkreuz , Switzerland
| | - C Mueller
- University Hospital Basel , Basel , Switzerland
| | - C S Zuern
- University Hospital Basel , Basel , Switzerland
| | - L Bonati
- University Hospital Basel , Basel , Switzerland
| | - D Conen
- McMaster University , Hamilton , Canada
| | - M Kuehne
- University Hospital Basel , Basel , Switzerland
| | - S Osswald
- University Hospital Basel , Basel , Switzerland
| |
Collapse
|
5
|
Pastor T, Kastner P, Souleiman F, Gehweiler D, Miglorini F, Link BC, Beeres FJP, Babst R, Nebelung S, Ganse B, Schoeneberg C, Gueorguiev B, Knobe M. Anatomical analysis of different helical plate designs for proximal humeral shaft fracture fixation. Br J Surg 2022. [DOI: 10.1093/bjs/znac187.008] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Objective
Helical plates are preferably used for proximal humeral shaft fracture fixation with metaphyseal extension into the humeral head and potentially avoid radial nerve irritation as compared to straight plates. The aims of this study were: (1) to investigate the safety of applying different long plate designs (straight, 45°-, 90°-helical and ALPS) in MIPO-technique to the humerus and (2) to assess and compare their distances to adjacent anatomical structures at risk.
Methods
MIPO was performed in 16 human cadaveric humeri using either a straight plate (group1), a 45°-helical (group2), a 90°-helical (group3) or an ALPS (group4). Using CT-angiography, distances between brachial arteries and plates were evaluated. Following, all specimens were dissected, and distances to the axillary, radial and musculocutaneous nerve were evaluated.
Results
None of the specimens demonstrated injuries of the anatomical structures at risk after MIPO with all investigated plate designs. Closest overall distance (mm(range)) between each plate and the radial nerve was 1(1–3) in group1, 7(2–11) in group2, 14(7–25) in group3 and 6(3–8) in group4. It was significantly longer in group3 and significantly shorter in group1 as compared to all other groups, p<0.001. Closest overall distance (mm(range)) between each plate and the musculocutaneous nerve was 16(8–28) in group1, 11(7–18) in group2, 3(2–4) in group3 and 6(3–8) in group4. It was significantly longer in group1 and significantly shorter in group3 as compared to all other groups, p<0.001. Closest overall distance (mm(range)) between each plate and the brachial artery was 21(18–23) in group1, 7(6–7) in group2, 4(3–5) in group3 and 7(6–7) in group4. It was significantly longer in group1 and significantly shorter in group3 as compared to all other groups, p<0.021.
Conclusion
MIPO with 45°- and 90°-helical plates as well as ALPS is safely feasible and showed a significant greater distance to the radial nerve compared to straight plates. However, distances remain low, and attention must be paid to the musculocutaneous nerve and the brachial artery when MIPO is used with ALPS, 45°- and 90°-helical implants. Moreover, the anterior part of the deltoid insertion will be detached when using 90°-helical and ALPS implants in MIPO-technique.
Collapse
Affiliation(s)
- T Pastor
- Department of Orthopaedic and Trauma Surgery, Cantonal Hospital Lucerne , Lucerne, Switzerland
- AO Research Institute Davos Biomechanical Development, , Davos, Switzerland
| | - P Kastner
- AO Research Institute Davos Biomechanical Development, , Davos, Switzerland
| | - F Souleiman
- AO Research Institute Davos Biomechanical Development, , Davos, Switzerland
| | - D Gehweiler
- AO Research Institute Davos Biomechanical Development, , Davos, Switzerland
| | - F Miglorini
- Department of Orthopaedic and Traumatology, Aachen University Hospital , Aachen, Germany
| | - B-C Link
- Department of Orthopaedic and Trauma Surgery, Cantonal Hospital Lucerne , Lucerne, Switzerland
| | - F J P Beeres
- Department of Orthopaedic and Trauma Surgery, Cantonal Hospital Lucerne , Lucerne, Switzerland
| | - R Babst
- Department of Orthopaedic and Trauma Surgery, Cantonal Hospital Lucerne , Lucerne, Switzerland
| | - S Nebelung
- Department of Radiology, Aachen University Hospital , Aachen, Germany
| | - B Ganse
- Department of Orthopaedic and Traumatology, Saarland University Hospital , Homburg, Germany
| | - C Schoeneberg
- Department of Orthopaedic and Traumatology, Alfried Krupp Hospital , Essen, Germany
| | - B Gueorguiev
- AO Research Institute Davos Biomechanical Development, , Davos, Switzerland
| | - M Knobe
- Department of Orthopaedic and Trauma Surgery, Cantonal Hospital Lucerne , Lucerne, Switzerland
| |
Collapse
|
6
|
Pastor T, Beeres FJP, Kastner P, Gehweiler D, Miglorini F, Nebelung S, Scaglioni MF, Souleiman F, Link BC, Babst R, Gueorguiev B, Knobe M. Anatomical analysis of different helical plate designs for distal femoral fracture fixation. Br J Surg 2022. [DOI: 10.1093/bjs/znac180.003] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Objective
Helical plates potentially avoid the medial neurovascular structures of the thigh. Recently, two plate designs (90°- and 180°-helix) proved similar biomechanically behavior compared to straight plates. The aims of this study were: (1) feasibility of applying 90°- and 180°-helical plates in MIPO-technique to the femur, (2) Assess the distances to adjacent anatomical structures which are at risk, (3) Compare these distances with medial straight plates, and (4) Correlate measurements performed during anatomical dissection with CT-angiography.
Methods
MIPO was performed in ten cadaveric femoral pairs using either a 90°-helical 14-hole-LCP (group1) or a 180°-helical 15-hole-LCP-DF (group2). Using CT-angiography, distances between femoral arteries and plates as well as distances between plates and perforators were evaluated. Following, specimens were dissected, and distances determined again. All plates were removed, and all measurements were repeated with straight medial plates (group3).
Results
Closest overall distances between plates and femoral arteries were 15 mm(11–19 mm) in group1, 22 mm(15–24 mm) in group2 and 6 mm(1–8 mm) in group3 with a significant difference between group1 and group3(p<0.001). Distances to the nearest perforators were 24 mm(15–32 mm) in group1 and 2 mm(1–4 mm) in group2. Measurement techniques (visual after surgery and CT-angiography) showed a strong correlation of 0.972(p<0.01).
Conclusion
MIPO with 90°- and 180°-helical plates is feasible and safe. Attention must be paid to the medial neurovascular structures with 90°-helical implants and to the proximal perforators with 180°-helical implants. Helical implants can avoid medial neurovascular structures compared to straight plates although care must be taken during their distally insertion. Measurements during anatomical dissection correlate with CT-angiography.
Collapse
Affiliation(s)
- T Pastor
- Department of Orthopaedics and Traumatology, Cantonal Hospital Lucerne , Lucerne, Switzerland
- AO Research Institute Biomechanical Development, , Davos, Switzerland
| | - F J P Beeres
- Department of Orthopaedics and Traumatology, Cantonal Hospital Lucerne , Lucerne, Switzerland
| | - P Kastner
- Department of Orthopaedics and Traumatology, AO Research Institute , Davos, Switzerland
| | - D Gehweiler
- AO Research Institute Biomechanical Development, , Davos, Switzerland
| | - F Miglorini
- Department of Orthopaedics and Traumatology, Aachen University Hospital , Aachen, Germany
| | - S Nebelung
- Department of Radiology, Aachen University Hospital , Aachen, Germany
| | - M F Scaglioni
- Department of Plastic Surgery, Cantonal Hospital Lucerne , Lucerne, Switzerland
| | - F Souleiman
- AO Research Institute Biomechanical Development, , Davos, Switzerland
| | - B-C Link
- Department of Orthopaedics and Traumatology, Cantonal Hospital Lucerne , Lucerne, Switzerland
| | - R Babst
- Department of Orthopaedics and Traumatology, Cantonal Hospital Lucerne , Lucerne, Switzerland
| | - B Gueorguiev
- AO Research Institute Biomechanical Development, , Davos, Switzerland
| | - M Knobe
- Department of Orthopaedics and Traumatology, Cantonal Hospital Lucerne , Lucerne, Switzerland
| |
Collapse
|
7
|
Chua W, Brady P, Nehaj F, Purmah Y, Khashaba A, Kastner P, Ziegler A, Kirchhof P, Fabritz L. Cross-sectional and longitudinal characterisation of cognitive function and outcomes in patients presenting to hospital with cardiovascular risk factors. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0481] [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/Introduction
Cardiovascular (CV) diseases including atrial fibrillation and arteriosclerosis are associated with impaired cognitive function. Cognitive dysfunction can impact the process of shared clinical decision making, reduce adherence to polypharmacy, and decrease quality of life. The prevalence of cognitive dysfunction in contemporary patients with CV diseases and its implication on future CV events is not well known.
Purpose
We 1) quantified cognitive function in patients presenting to hospital with CV diseases, 2) identified clinical variables and blood biomarkers associated with cognitive dysfunction, and 3) quantified the hazard of abnormal cognitive function for predicting MACCE (major adverse CV and cerebrovascular events).
Methods and results
Of 1625 consecutive patients presenting acutely to a large teaching hospital with CV diseases, 614 patients (median age [Q1, Q3] 68 [58, 76] years; 66% male) who completed the Montreal Cognitive Assessment (MoCA) were analysed. The median [Q1, Q3] MoCA score was 25 points [21, 27]. 360 patients (59%) had an abnormal score (<26). At baseline, patients with abnormal scores were more likely to be female (odds ratio, OR [95% confidence intervals], 1.874 [1.287, 2.728]), have BMI<30 (OR 0.584 [0.410, 0.831]), heart failure (OR 1.492 [1.043, 2.135]), diabetes (OR 2.212 [1.529, 3.199]), chronic kidney disease (CKD-EPI<60 ml/min, OR 1.553 [1.021, 2.361]), and have more CV co-morbidities (OR per additional co-morbidity 1.415 [1.246, 1.605]). Amongst 12 CV biomarkers tested, elevated Bone Morphogenetic Protein 10 (OR 1.325 [1.022, 1.719]) and Growth Differentiation Factor 15 (OR 1.419 [1.054, 1.912]) increased odds of abnormal scores.
Cox proportional hazards model adjusted for competing risk of non-CV death assessed the relationship between abnormal cognitive function and MACCE (stroke, TIA, myocardial infarction, hospitalisation for heart failure, CV death). Follow-up time ranged from 2.7 to 6.1 years. Patients were censored at 2.5 years for this analysis. 130 out of 614 patients experienced a MACCE (21%) and 71 had a non-CV death (12%). Patients with abnormal MoCA scores were at higher risk for MACCE (subhazard ratio, sHR [95% CI] 1.827 [1.253, 2.664]). The hazard remained significant after adjustment for age, sex, obesity, atrial fibrillation, stroke, heart failure, hypertension, coronary artery disease, diabetes, peripheral artery disease and renal dysfunction (sHR 1.367 [1.056, 2.326]; Figure). All-cause mortality was 1.785 times higher for those with abnormal MoCA scores [1.061, 3.002].
Conclusion
In this study, 3 out of 5 patients with CV diseases had abnormal MoCA scores at baseline. Abnormal cognitive scores significantly predicted patients who went on to experience a MACCE within 2.5 years of follow-up. These observations call for further research and action to provide additional diagnostics, support and early intervention to address cognitive dysfunction in CV patients.
Funding Acknowledgement
Type of funding sources: Public grant(s) – EU funding. Main funding source(s): EU H2020 CATCH ME Cumulative incidence function
Collapse
Affiliation(s)
- W Chua
- University of Birmingham, Institute of Cardiovascular Sciences, Birmingham, United Kingdom
| | - P Brady
- University of Birmingham, Institute of Cardiovascular Sciences, Birmingham, United Kingdom
| | - F Nehaj
- University of Birmingham, Institute of Cardiovascular Sciences, Birmingham, United Kingdom
| | - Y Purmah
- University of Birmingham, Institute of Cardiovascular Sciences, Birmingham, United Kingdom
| | - A Khashaba
- University of Birmingham, Institute of Cardiovascular Sciences, Birmingham, United Kingdom
| | - P Kastner
- Roche Diagnostics GmbH, Penzberg, Germany
| | - A Ziegler
- Roche Diagnostics International AG, Rotkreuz, Switzerland
| | - P Kirchhof
- University Heart & Vascular Center Hamburg, Hamburg, Germany
| | - L Fabritz
- University of Birmingham, Institute of Cardiovascular Sciences, Birmingham, United Kingdom
| |
Collapse
|
8
|
Cova G, Taroni C, Deau MC, Cai Q, Mittelheisser V, Philipps M, Jung M, Cerciat M, Le Gras S, Thibault-Carpentier C, Jost B, Carlsson L, Thornton AM, Shevach EM, Kirstetter P, Kastner P, Chan S. Helios represses megakaryocyte priming in hematopoietic stem and progenitor cells. J Exp Med 2021; 218:e20202317. [PMID: 34459852 PMCID: PMC8406645 DOI: 10.1084/jem.20202317] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 05/28/2021] [Accepted: 07/27/2021] [Indexed: 12/13/2022] Open
Abstract
Our understanding of cell fate decisions in hematopoietic stem cells is incomplete. Here, we show that the transcription factor Helios is highly expressed in murine hematopoietic stem and progenitor cells (HSPCs), where it is required to suppress the separation of the platelet/megakaryocyte lineage from the HSPC pool. Helios acts mainly in quiescent cells, where it directly represses the megakaryocyte gene expression program in cells as early as the stem cell stage. Helios binding promotes chromatin compaction, notably at the regulatory regions of platelet-specific genes recognized by the Gata2 and Runx1 transcriptional activators, implicated in megakaryocyte priming. Helios null HSPCs are biased toward the megakaryocyte lineage at the expense of the lymphoid and partially resemble cells of aging animals. We propose that Helios acts as a guardian of HSPC pluripotency by continuously repressing the megakaryocyte fate, which in turn allows downstream lymphoid priming to take place. These results highlight the importance of negative and positive priming events in lineage commitment.
Collapse
Affiliation(s)
- Giovanni Cova
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Chiara Taroni
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Marie-Céline Deau
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Qi Cai
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Vincent Mittelheisser
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Muriel Philipps
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Matthieu Jung
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- Plateforme GenomEast, Infrastructure France Génomique, Illkirch, France
| | - Marie Cerciat
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- Plateforme GenomEast, Infrastructure France Génomique, Illkirch, France
| | - Stéphanie Le Gras
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- Plateforme GenomEast, Infrastructure France Génomique, Illkirch, France
| | - Christelle Thibault-Carpentier
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- Plateforme GenomEast, Infrastructure France Génomique, Illkirch, France
| | - Bernard Jost
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- Plateforme GenomEast, Infrastructure France Génomique, Illkirch, France
| | - Leif Carlsson
- Umeå Center for Molecular Medicine, Umeå University, Umeå, Sweden
| | - Angela M. Thornton
- Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Ethan M. Shevach
- Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Peggy Kirstetter
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- Faculté de Médecine, Université de Strasbourg, Strasbourg, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| |
Collapse
|
9
|
Simand C, Keime C, Cayé A, Arfeuille C, Passet M, Kim R, Cavé H, Clappier E, Kastner P, Chan S, Heizmann B. Ikaros deficiency is associated with aggressive BCR-ABL1 B cell precursor acute lymphoblastic leukemia independent of the lineage and developmental origin. Haematologica 2021; 107:316-320. [PMID: 34587720 PMCID: PMC8719082 DOI: 10.3324/haematol.2021.279125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Indexed: 11/29/2022] Open
Affiliation(s)
- Célestine Simand
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France; Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France; Service d'Hématologie, Institut de Cancérologie Strasbourg Europe (ICANS), Strasbourg
| | - Céline Keime
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France; Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France; Université de Strasbourg, Illkirch
| | - Aurélie Cayé
- Département de Génétique, Assistance Publique des Hôpitaux de Paris (AP-HP), Hôpital Robert Debré, Paris, France; INSERM UMR_S1131, Institut Universitaire d'Hématologie, Université Paris Diderot, Paris-Sorbonne-Cité, Paris
| | - Chloé Arfeuille
- Département de Génétique, Assistance Publique des Hôpitaux de Paris (AP-HP), Hôpital Robert Debré, Paris, France; INSERM UMR_S1131, Institut Universitaire d'Hématologie, Université Paris Diderot, Paris-Sorbonne-Cité, Paris
| | - Marie Passet
- Université de Paris, Laboratory of Hematology, AP-HP, Hôpital Saint-Louis, Paris
| | - Rathana Kim
- Université de Paris, Laboratory of Hematology, AP-HP, Hôpital Saint-Louis, Paris
| | - Hélène Cavé
- Département de Génétique, Assistance Publique des Hôpitaux de Paris (AP-HP), Hôpital Robert Debré, Paris, France; INSERM UMR_S1131, Institut Universitaire d'Hématologie, Université Paris Diderot, Paris-Sorbonne-Cité, Paris
| | - Emmanuelle Clappier
- Université de Paris, Laboratory of Hematology, AP-HP, Hôpital Saint-Louis, Paris
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France; Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France; Université de Strasbourg, Illkirch, France; Faculté de Médecine, Université de Strasbourg, Strasbourg.
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France; Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France; Université de Strasbourg, Illkirch
| | - Beate Heizmann
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France; Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France; Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France; Université de Strasbourg, Illkirch
| |
Collapse
|
10
|
Bernardi C, Maurer G, Ye T, Marchal P, Jost B, Wissler M, Maurer U, Kastner P, Chan S, Charvet C. CD4 + T cells require Ikaros to inhibit their differentiation toward a pathogenic cell fate. Proc Natl Acad Sci U S A 2021; 118:e2023172118. [PMID: 33893236 PMCID: PMC8092604 DOI: 10.1073/pnas.2023172118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The production of proinflammatory cytokines, particularly granulocyte-macrophage colony-stimulating factor (GM-CSF), by pathogenic CD4+ T cells is central for mediating tissue injury in inflammatory and autoimmune diseases. However, the factors regulating the T cell pathogenic gene expression program remain unclear. Here, we investigated how the Ikaros transcription factor regulates the global gene expression and chromatin accessibility changes in murine T cells during Th17 polarization and after activation via the T cell receptor (TCR) and CD28. We found that, in both conditions, Ikaros represses the expression of genes from the pathogenic signature, particularly Csf2, which encodes GM-CSF. We show that, in TCR/CD28-activated T cells, Ikaros binds a critical enhancer downstream of Csf2 and is required to regulate chromatin accessibility at multiple regions across this locus. Genome-wide Ikaros binding is associated with more compact chromatin, notably at multiple sites containing NFκB or STAT5 target motifs, and STAT5 or NFκB inhibition prevents GM-CSF production in Ikaros-deficient cells. Importantly, Ikaros also limits GM-CSF production in TCR/CD28-activated human T cells. Our data therefore highlight a critical conserved transcriptional mechanism that antagonizes GM-CSF expression in T cells.
Collapse
Affiliation(s)
- Chiara Bernardi
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U1258, 67404 Illkirch, France
- Université de Strasbourg, 67000 Strasbourg, France
| | - Gaëtan Maurer
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U1258, 67404 Illkirch, France
- Université de Strasbourg, 67000 Strasbourg, France
| | - Tao Ye
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U1258, 67404 Illkirch, France
- Université de Strasbourg, 67000 Strasbourg, France
- Plateforme GenomEast, Infrastructure France Génomique, 67404 Illkirch, France
| | - Patricia Marchal
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U1258, 67404 Illkirch, France
- Université de Strasbourg, 67000 Strasbourg, France
| | - Bernard Jost
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France
- Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U1258, 67404 Illkirch, France
- Université de Strasbourg, 67000 Strasbourg, France
- Plateforme GenomEast, Infrastructure France Génomique, 67404 Illkirch, France
| | - Manuela Wissler
- Institute of Molecular Medicine and Cell Research, Albert-Ludwigs-University of Freiburg, 79104 Freiburg, Germany
| | - Ulrich Maurer
- Institute of Molecular Medicine and Cell Research, Albert-Ludwigs-University of Freiburg, 79104 Freiburg, Germany
- Spemann Graduate School of Biology and Medicine, Albert-Ludwigs-University of Freiburg, 79104 Freiburg, Germany
- BIOSS, Centre for Biological Signalling Studies, 79104 Freiburg, Germany
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France;
- Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U1258, 67404 Illkirch, France
- Université de Strasbourg, 67000 Strasbourg, France
- Faculté de Médecine, Université de Strasbourg, 67000 Strasbourg, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France;
- Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U1258, 67404 Illkirch, France
- Université de Strasbourg, 67000 Strasbourg, France
| | - Céline Charvet
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67404 Illkirch, France;
- Centre National de la Recherche Scientifique, UMR7104, 67404 Illkirch, France
- Institut National de la Santé et de la Recherche Médicale, U1258, 67404 Illkirch, France
- Université de Strasbourg, 67000 Strasbourg, France
| |
Collapse
|
11
|
Heizmann B, Le Gras S, Simand C, Marchal P, Chan S, Kastner P. Correction: Ikaros antagonizes DNA binding by STAT5 in pre-B cells. PLoS One 2021; 16:e0246570. [PMID: 33513189 PMCID: PMC7845949 DOI: 10.1371/journal.pone.0246570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
|
12
|
Heizmann B, Le Gras S, Simand C, Marchal P, Chan S, Kastner P. Ikaros antagonizes DNA binding by STAT5 in pre-B cells. PLoS One 2020; 15:e0242211. [PMID: 33180866 PMCID: PMC7660478 DOI: 10.1371/journal.pone.0242211] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 08/04/2020] [Accepted: 10/28/2020] [Indexed: 12/19/2022] Open
Abstract
The IKZF1 gene, which encodes the Ikaros transcription factor, is frequently deleted or mutated in patients with B-cell precursor acute lymphoblastic leukemias that express oncogenes, like BCR-ABL, which activate the JAK-STAT5 pathway. Ikaros functionally antagonizes the transcriptional programs downstream of IL-7/STAT5 during B cell development, as well as STAT5 activity in leukemic cells. However, the mechanisms by which Ikaros interferes with STAT5 function is unknown. We studied the genomic distribution of Ikaros and STAT5 on chromatin in a murine pre-B cell line, and found that both proteins colocalize on >60% of STAT5 target regions. Strikingly, Ikaros activity leads to widespread loss of STAT5 binding at most of its genomic targets within two hours of Ikaros induction, suggesting a direct mechanism. Ikaros did not alter the level of total or phosphorylated STAT5 proteins, nor did it associate with STAT5. Using sequences from the Cish, Socs2 and Bcl6 genes that Ikaros and STAT5 target, we show that both proteins bind overlapping sequences at GGAA motifs. Our results demonstrate that Ikaros antagonizes STAT5 DNA binding, in part by competing for common target sequences. Our study has implications for understanding the functions of Ikaros and STAT5 in B cell development and transformation.
Collapse
Affiliation(s)
- Beate Heizmann
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- * E-mail: (BH); (SC and PK)
| | - Stéphanie Le Gras
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Célestine Simand
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- Service d’Hématologie, Institut de Cancérologie Strasbourg Europe (ICANS), Strasbourg, France
| | - Patricia Marchal
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- * E-mail: (BH); (SC and PK)
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- Faculté de Médecine, Université de Strasbourg, Strasbourg, France
- * E-mail: (BH); (SC and PK)
| |
Collapse
|
13
|
Morel G, Deau MC, Simand C, Caye-Eude A, Arfeuille C, Ittel A, Miguet L, Mauvieux L, Herbrecht R, Paillard C, Strullu M, Cavé H, Chan S, Kastner P, Heizmann B. Large deletions of the 5' region of IKZF1 lead to haploinsufficiency in B-cell precursor acute lymphoblastic leukaemia. Br J Haematol 2019; 186:e155-e159. [PMID: 31148164 DOI: 10.1111/bjh.15994] [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: 01/31/2019] [Accepted: 03/29/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Guillaume Morel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Université de Strasbourg, Illkirch, France.,Département d'Oncologie et d'Hématologie, CHU Strasbourg, Hôpital de Hautepierre, Strasbourg, France
| | - Marie-Céline Deau
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Université de Strasbourg, Illkirch, France
| | - Célestine Simand
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Université de Strasbourg, Illkirch, France.,Département d'Oncologie et d'Hématologie, CHU Strasbourg, Hôpital de Hautepierre, Strasbourg, France
| | - Aurélie Caye-Eude
- Département de Génétique, Assistance Publique des Hôpitaux de Paris (AP-HP), Hôpital Robert Debré, Paris, France.,INSERM UMR_S1131, Institut Universitaire d'Hématologie, Université Paris Diderot, Paris-Sorbonne-Cité, Paris, France
| | - Chloé Arfeuille
- Département de Génétique, Assistance Publique des Hôpitaux de Paris (AP-HP), Hôpital Robert Debré, Paris, France.,INSERM UMR_S1131, Institut Universitaire d'Hématologie, Université Paris Diderot, Paris-Sorbonne-Cité, Paris, France
| | - Antoine Ittel
- Laboratoire d'Hématologie, CHU Strasbourg, Hôpital de Hautepierre, Strasbourg, France
| | - Laurent Miguet
- Laboratoire d'Hématologie, CHU Strasbourg, Hôpital de Hautepierre, Strasbourg, France.,Université de Strasbourg, INSERM, UMR-S1113/IRFAC, Strasbourg, France.,Faculté de Médecine, Université de Strasbourg, Strasbourg, France
| | - Laurent Mauvieux
- Laboratoire d'Hématologie, CHU Strasbourg, Hôpital de Hautepierre, Strasbourg, France.,Université de Strasbourg, INSERM, UMR-S1113/IRFAC, Strasbourg, France.,Faculté de Médecine, Université de Strasbourg, Strasbourg, France
| | - Raoul Herbrecht
- Département d'Oncologie et d'Hématologie, CHU Strasbourg, Hôpital de Hautepierre, Strasbourg, France.,Université de Strasbourg, INSERM, UMR-S1113/IRFAC, Strasbourg, France.,Faculté de Médecine, Université de Strasbourg, Strasbourg, France
| | - Catherine Paillard
- Faculté de Médecine, Université de Strasbourg, Strasbourg, France.,Service d'Hémato-Oncologie Pédiatrique, CHU Strasbourg, Hôpital de Hautepierre, Strasbourg, France.,Université de Strasbourg, INSERM UMR_S1109, Strasbourg, France
| | - Marion Strullu
- INSERM UMR_S1131, Institut Universitaire d'Hématologie, Université Paris Diderot, Paris-Sorbonne-Cité, Paris, France.,Assistance Publique des Hôpitaux de Paris AP-HP, Hôpital Robert Debré, Service d'Hématologie Pédiatrique, Paris, France
| | - Hélène Cavé
- Département de Génétique, Assistance Publique des Hôpitaux de Paris (AP-HP), Hôpital Robert Debré, Paris, France.,INSERM UMR_S1131, Institut Universitaire d'Hématologie, Université Paris Diderot, Paris-Sorbonne-Cité, Paris, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Université de Strasbourg, Illkirch, France
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Université de Strasbourg, Illkirch, France.,Faculté de Médecine, Université de Strasbourg, Strasbourg, France
| | - Beate Heizmann
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Université de Strasbourg, Illkirch, France
| |
Collapse
|
14
|
Mastio J, Simand C, Cova G, Kastner P, Chan S, Kirstetter P. Ikaros cooperates with Notch activation and antagonizes TGFβ signaling to promote pDC development. PLoS Genet 2018; 14:e1007485. [PMID: 30001316 PMCID: PMC6042690 DOI: 10.1371/journal.pgen.1007485] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 06/13/2018] [Indexed: 12/17/2022] Open
Abstract
Plasmacytoid and conventional dendritic cells (pDCs and cDCs) arise from monocyte and dendritic progenitors (MDPs) and common dendritic progenitors (CDPs) through gene expression changes that remain partially understood. Here we show that the Ikaros transcription factor is required for DC development at multiple stages. Ikaros cooperates with Notch pathway activation to maintain the homeostasis of MDPs and CDPs. Ikaros then antagonizes TGFβ function to promote pDC differentiation from CDPs. Strikingly, Ikaros-deficient CDPs and pDCs express a cDC-like transcriptional signature that is correlated with TGFβ activation, suggesting that Ikaros is an upstream negative regulator of the TGFβ pathway and a repressor of cDC-lineage genes in pDCs. Almost all of these phenotypes can be rescued by short-term in vitro treatment with γ-secretase inhibitors, which affects both TGFβ-dependent and -independent pathways, but is Notch-independent. We conclude that Ikaros is a crucial differentiation factor in early dendritic progenitors that is required for pDC identity. Dendritic cells (DCs) are an important component of the immune system, and exist as two major subtypes: conventional DCs (cDCs) which present antigen via major histocompatibility class II molecules, and plasmacytoid DCs (pDCs) which act mainly as producers of type-I interferon in response to viral infections. Both types of DCs derive from a common dendritic progenitor (CDP), but the genetic pathways that influence their development are not completely understood. A better understanding of these pathways is important, which may lead to protocols for generating specific DCs in culture, depending on the need. In this study, we have discovered important roles for the Ikaros transcription factor in DC development. We found that: (i) Ikaros cooperates with the Notch pathway to promote the development or homeostasis of CDPs; (ii) Ikaros controls pDC differentiation from CDPs through a γ-secretase sensitive pathway; and (iii) Ikaros antagonizes the TGFβ pathway to inhibit cDC differentiation. Our results thus identify Ikaros as a key player in the early steps of DC development.
Collapse
Affiliation(s)
- Jérôme Mastio
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| | - Célestine Simand
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| | - Giovanni Cova
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France.,Faculté de Médecine, Université de Strasbourg, Strasbourg, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| | - Peggy Kirstetter
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| |
Collapse
|
15
|
Heizmann B, Kastner P, Chan S. The Ikaros family in lymphocyte development. Curr Opin Immunol 2018; 51:14-23. [DOI: 10.1016/j.coi.2017.11.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 11/21/2017] [Accepted: 11/30/2017] [Indexed: 10/18/2022]
|
16
|
Nehmar R, Alsaleh G, Voisin B, Flacher V, Mariotte A, Saferding V, Puchner A, Niederreiter B, Vandamme T, Schabbauer G, Kastner P, Chan S, Kirstetter P, Holcmann M, Mueller C, Sibilia J, Bahram S, Blüml S, Georgel P. Therapeutic Modulation of Plasmacytoid Dendritic Cells in Experimental Arthritis. Arthritis Rheumatol 2017; 69:2124-2135. [PMID: 28777892 DOI: 10.1002/art.40225] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 07/25/2017] [Indexed: 01/17/2023]
Abstract
OBJECTIVE The role of plasmacytoid dendritic cells (PDCs) and type I interferons (IFNs) in rheumatoid arthritis (RA) remains a subject of controversy. This study was undertaken to explore the contribution of PDCs and type I IFNs to RA pathogenesis using various animal models of PDC depletion and to monitor the effect of localized PDC recruitment and activation on joint inflammation and bone damage. METHODS Mice with K/BxN serum-induced arthritis, collagen-induced arthritis, and human tumor necrosis factor transgene insertion were studied. Symptoms were evaluated by visual scoring, quantification of paw swelling, determination of cytokine levels by enzyme-linked immunosorbent assay, and histologic analysis. Imiquimod-dependent therapeutic effects were monitored by transcriptome analysis (using quantitative reverse transcriptase-polymerase chain reaction) and flow cytometric analysis of the periarticular tissue. RESULTS PDC-deficient mice showed exacerbation of inflammatory and arthritis symptoms after arthritogenic serum transfer. In contrast, enhancing PDC recruitment and activation to arthritic joints by topical application of the Toll-like receptor 7 (TLR-7) agonist imiquimod significantly ameliorated arthritis in various mouse models. Imiquimod induced an IFN signature and led to reduced infiltration of inflammatory cells. CONCLUSION The therapeutic effects of imiquimod on joint inflammation and bone destruction are dependent on TLR-7 sensing by PDCs and type I IFN signaling. Our findings indicate that local recruitment and activation of PDCs represents an attractive therapeutic opportunity for RA patients.
Collapse
Affiliation(s)
- Ramzi Nehmar
- Université de Strasbourg, INSERM, IRM UMR-S 1109, Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, and Fédération Hospitalo-Universitaire, OMICARE, Centre de Recherche d'Immunologie et d'Hématologie, Strasbourg, France
| | - Ghada Alsaleh
- Université de Strasbourg, INSERM, IRM UMR-S 1109, Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, and Fédération Hospitalo-Universitaire, OMICARE, Centre de Recherche d'Immunologie et d'Hématologie, Strasbourg, France
| | - Benjamin Voisin
- Université de Strasbourg, CNRS UPR 3572, Laboratory of Immunopathology and Therapeutic Chemistry/Laboratory of Excellence MEDALIS, Institut de Biologie Moléculaire et Cellulaire, Strasbourg, France
| | - Vincent Flacher
- Université de Strasbourg, CNRS UPR 3572, Laboratory of Immunopathology and Therapeutic Chemistry/Laboratory of Excellence MEDALIS, Institut de Biologie Moléculaire et Cellulaire, Strasbourg, France
| | - Alexandre Mariotte
- Université de Strasbourg, INSERM, IRM UMR-S 1109, Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, and Fédération Hospitalo-Universitaire, OMICARE, Centre de Recherche d'Immunologie et d'Hématologie, Strasbourg, France
| | | | - Antonia Puchner
- Internal Medicine 3, Medical University of Vienna, Vienna, Austria
| | | | - Thierry Vandamme
- Université de Strasbourg, CNRS UMR 7199, Faculté de Pharmacie, Illkirch, France
| | - Gernot Schabbauer
- Center for Physiology and Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Université de Strasbourg, INSERM U964, CNRS UMR 7104, Illkirch, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Université de Strasbourg, INSERM U964, CNRS UMR 7104, Illkirch, France
| | - Peggy Kirstetter
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Université de Strasbourg, INSERM U964, CNRS UMR 7104, Illkirch, France
| | - Martin Holcmann
- Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Christopher Mueller
- Université de Strasbourg, CNRS UPR 3572, Laboratory of Immunopathology and Therapeutic Chemistry/Laboratory of Excellence MEDALIS, Institut de Biologie Moléculaire et Cellulaire, Strasbourg, France
| | - Jean Sibilia
- Université de Strasbourg, INSERM, IRM UMR-S 1109, Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, and Fédération Hospitalo-Universitaire, OMICARE, Centre de Recherche d'Immunologie et d'Hématologie, Strasbourg, France
| | - Seiamak Bahram
- Université de Strasbourg, INSERM, IRM UMR-S 1109, Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, and Fédération Hospitalo-Universitaire, OMICARE, Centre de Recherche d'Immunologie et d'Hématologie, Strasbourg, France
| | - Stephan Blüml
- Internal Medicine 3, Medical University of Vienna, Vienna, Austria
| | - Philippe Georgel
- Université de Strasbourg, INSERM, IRM UMR-S 1109, Fédération de Médecine Translationnelle de Strasbourg, Faculté de Médecine, and Fédération Hospitalo-Universitaire, OMICARE, Centre de Recherche d'Immunologie et d'Hématologie, Strasbourg, France
| |
Collapse
|
17
|
Li S, Heller JJ, Bostick JW, Lee A, Schjerven H, Kastner P, Chan S, Chen ZE, Zhou L. Ikaros Inhibits Group 3 Innate Lymphoid Cell Development and Function by Suppressing the Aryl Hydrocarbon Receptor Pathway. Immunity 2017; 45:185-97. [PMID: 27438771 DOI: 10.1016/j.immuni.2016.06.027] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 04/27/2016] [Accepted: 05/10/2016] [Indexed: 02/08/2023]
Abstract
Group 3 innate lymphoid cells (ILC3s) expressing the transcription factor (TF) RORγt are important for the defense and homeostasis of host intestinal tissues. The zinc finger TF Ikaros, encoded by Ikzf1, is essential for the development of RORγt(+) fetal lymphoid tissue inducer (LTi) cells and lymphoid organogenesis, but its role in postnatal ILC3s is unknown. Here, we show that small-intestinal ILC3s had lower Ikaros expression than ILC precursors and other ILC subsets. Ikaros inhibited ILC3s in a cell-intrinsic manner through zinc-finger-dependent inhibition of transcriptional activity of the aryl hydrocarbon receptor, a key regulator of ILC3 maintenance and function. Ablation of Ikzf1 in RORγt(+) ILC3s resulted in increased expansion and cytokine production of intestinal ILC3s and protection against infection and colitis. Therefore, in contrast to being required for LTi development, Ikaros inhibits postnatal ILC3 development and function to regulate gut immune responses at steady state and in disease.
Collapse
Affiliation(s)
- Shiyang Li
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, FL 32608, USA
| | - Jennifer J Heller
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - John W Bostick
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Chemical and Biological Engineering, McCormick School of Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Aileen Lee
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Hilde Schjerven
- Department of Laboratory Medicine, UCSF School of Medicine, San Francisco, CA 94143, USA
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Zongming E Chen
- Department of Laboratory Medicine in Geisinger Health System, 100 N. Academy Avenue, MC 19-20, Danville, PA 17822, USA
| | - Liang Zhou
- Department of Pathology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, FL 32608, USA.
| |
Collapse
|
18
|
Martín-Ibáñez R, Pardo M, Giralt A, Miguez A, Guardia I, Marion-Poll L, Herranz C, Esgleas M, Garcia-Díaz Barriga G, Edel MJ, Vicario-Abejón C, Alberch J, Girault JA, Chan S, Kastner P, Canals JM. Helios expression coordinates the development of a subset of striatopallidal medium spiny neurons. Development 2017; 144:1566-1577. [PMID: 28289129 PMCID: PMC5399659 DOI: 10.1242/dev.138248] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 03/03/2017] [Indexed: 12/25/2022]
Abstract
Here, we unravel the mechanism of action of the Ikaros family zinc finger protein Helios (He) during the development of striatal medium spiny neurons (MSNs). He regulates the second wave of striatal neurogenesis involved in the generation of striatopallidal neurons, which express dopamine 2 receptor and enkephalin. To exert this effect, He is expressed in neural progenitor cells (NPCs) keeping them in the G1/G0 phase of the cell cycle. Thus, a lack of He results in an increase of S-phase entry and S-phase length of NPCs, which in turn impairs striatal neurogenesis and produces an accumulation of the number of cycling NPCs in the germinal zone (GZ), which end up dying at postnatal stages. Therefore, He−/− mice show a reduction in the number of dorso-medial striatal MSNs in the adult that produces deficits in motor skills acquisition. In addition, overexpression of He in NPCs induces misexpression of DARPP-32 when transplanted in mouse striatum. These findings demonstrate that He is involved in the correct development of a subset of striatopallidal MSNs and reveal new cellular mechanisms for neuronal development. Summary: The transcription factor Helios regulates G1-S transition to promote neuronal differentiation of a striatopallidal neuronal subpopulation involved in motor skill acquisition.
Collapse
Affiliation(s)
- Raquel Martín-Ibáñez
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Research and Development Unit, Production and Validation Center of Advanced Therapies (Creatio), Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
| | - Mónica Pardo
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Albert Giralt
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Pathophysiology of Neurodegenerative Diseases Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
| | - Andrés Miguez
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Inés Guardia
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Lucile Marion-Poll
- Inserm UMR-S839; Université Pierre et Marie Curie (UPMC, Paris 6), Sorbonne Universités; Institut du Fer à Moulin, 75005 Paris, France
| | - Cristina Herranz
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Research and Development Unit, Production and Validation Center of Advanced Therapies (Creatio), Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
| | - Miriam Esgleas
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Gerardo Garcia-Díaz Barriga
- Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Pathophysiology of Neurodegenerative Diseases Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
| | - Michael J Edel
- Control of Pluripotency Laboratory, Department of Biomedical Sciences, Faculty of Medicine and Health Science, University of Barcelona, 08036 Barcelona, Spain.,Victor Chang Cardiac Research Institute, Sydney, New South Wales, 2010 Australia.,School of Medicine and Pharmacology, Anatomy, Physiology and Human Biology, CCTRM, University of Western Australia, Western Australia, 6009 Australia
| | - Carlos Vicario-Abejón
- Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Departamento de Neurobiología Molecular, Celular y del Desarrollo, Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC), 28002 Madrid, Spain
| | - Jordi Alberch
- Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain
| | - Jean-Antoine Girault
- Inserm UMR-S839; Université Pierre et Marie Curie (UPMC, Paris 6), Sorbonne Universités; Institut du Fer à Moulin, 75005 Paris, France
| | - Susan Chan
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain.,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain
| | - Philippe Kastner
- Department of Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm U964, Centre National de la Recherche Scientifique (CNRS) UMR 7104, 67400 Illkirch-Graffenstaden, France.,Faculté de Médecine, Université de Strasbourg, 67081 Strasbourg, France
| | - Josep M Canals
- Stem Cells and Regenerative Medicine Laboratory, Production and Validation Center of Advanced Therapies (Creatio), Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain .,Neuroscience Institute, University of Barcelona, 08036 Barcelona, Spain.,August Pi i Sunyer Biomedical Research Institute (IDIBAPS), 08036 Barcelona, Spain.,Networked Biomedical Research Centre for Neurodegenerative Disorders (CIBERNED), Spain.,Research and Development Unit, Production and Validation Center of Advanced Therapies (Creatio), Faculty of Medicine and Health Sciences, University of Barcelona, 08036 Barcelona, Spain
| |
Collapse
|
19
|
Dembélé D, Kastner P. Comments on: fold change rank ordering statistics: a new method for detecting differentially expressed genes. BMC Bioinformatics 2016; 17:462. [PMID: 27846811 PMCID: PMC5111201 DOI: 10.1186/s12859-016-1322-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 11/05/2016] [Indexed: 01/28/2023] Open
Abstract
We published a new method (BMC Bioinformatics 2014, 15:14) for searching for differentially expressed genes from two biological conditions datasets. The presentation of theorem 1 in this paper was incomplete. We received an anonymous comment about our publication that motivates the present work. Here, we present a complementary result which is necessary from the theoretical point of view to demonstrate our theorem. We also show that this result has no negative impact on our conclusions obtained with synthetic and experimental microarrays datasets.
Collapse
Affiliation(s)
- Doulaye Dembélé
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR 7104, INSERM U964, Université de Strasbourg, Illkirch, 67404, France. .,IGBMC Microarray and Sequencing Platform, Illkirch, 67404, France.
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR 7104, INSERM U964, Université de Strasbourg, Illkirch, 67404, France.,Faculté de Medécine, Université de Strasbourg, Strasbourg, France
| |
Collapse
|
20
|
Apostolov A, Litim-Mecheri I, Oravecz A, Goepp M, Kirstetter P, Marchal P, Ittel A, Mauvieux L, Chan S, Kastner P. Sumoylation Inhibits the Growth Suppressive Properties of Ikaros. PLoS One 2016; 11:e0157767. [PMID: 27315244 PMCID: PMC4912065 DOI: 10.1371/journal.pone.0157767] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 06/03/2016] [Indexed: 01/01/2023] Open
Abstract
The Ikaros transcription factor is a tumor suppressor that is also important for lymphocyte development. How post-translational modifications influence Ikaros function remains partially understood. We show that Ikaros undergoes sumoylation in developing T cells that correspond to mono-, bi- or poly-sumoylation by SUMO1 and/or SUMO2/3 on three lysine residues (K58, K240 and K425). Sumoylation occurs in the nucleus and requires DNA binding by Ikaros. Sumoylated Ikaros is less effective than unsumoylated forms at inhibiting the expansion of murine leukemic cells, and Ikaros sumoylation is abundant in human B-cell acute lymphoblastic leukemic cells, but not in healthy peripheral blood leukocytes. Our results suggest that sumoylation may be important in modulating the tumor suppressor function of Ikaros.
Collapse
Affiliation(s)
- Apostol Apostolov
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Isma Litim-Mecheri
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Attila Oravecz
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Marie Goepp
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Peggy Kirstetter
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Patricia Marchal
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Antoine Ittel
- Laboratoire d’Hématologie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
- Laboratoire d’Hématologie Cellulaire, EA 3430, Institut d’Hématologie et d’Immunologie, Faculté de Médecine de Strasbourg, Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, Strasbourg, France
| | - Laurent Mauvieux
- Laboratoire d’Hématologie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
- Laboratoire d’Hématologie Cellulaire, EA 3430, Institut d’Hématologie et d’Immunologie, Faculté de Médecine de Strasbourg, Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, Strasbourg, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
- Faculté de Médecine, Université de Strasbourg, Strasbourg, France
- * E-mail:
| |
Collapse
|
21
|
Macias-Garcia A, Heizmann B, Sellars M, Marchal P, Dali H, Pasquali JL, Muller S, Kastner P, Chan S. Ikaros Is a Negative Regulator of B1 Cell Development and Function. J Biol Chem 2016; 291:9073-86. [PMID: 26841869 DOI: 10.1074/jbc.m115.704239] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [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: 11/19/2015] [Indexed: 12/19/2022] Open
Abstract
B1 B cells secrete most of the circulating natural antibodies and are considered key effector cells of the innate immune response. However, B1 cell-associated antibodies often cross-react with self-antigens, which leads to autoimmunity, and B1 cells have been implicated in cancer. How B1 cell activity is regulated remains unclear. We show that the Ikaros transcription factor is a major negative regulator of B1 cell development and function. Using conditional knock-out mouse models to delete Ikaros at different locations, we show that Ikaros-deficient mice exhibit specific and significant increases in splenic and bone marrow B1 cell numbers, and that the B1 progenitor cell pool is increased ∼10-fold in the bone marrow. Ikaros-null B1 cells resemble WT B1 cells at the molecular and cellular levels, but show a down-regulation of signaling components important for inhibiting proliferation and immunoglobulin production. Ikaros-null B1 cells hyper-react to TLR4 stimulation and secrete high amounts of IgM autoantibodies. These results indicate that Ikaros is required to limit B1 cell homeostasis in the adult.
Collapse
Affiliation(s)
- Alejandra Macias-Garcia
- From the Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Beate Heizmann
- From the Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France,
| | - MacLean Sellars
- From the Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Patricia Marchal
- From the Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - Hayet Dali
- Institut de Biologie Moléculaire et Cellulaire (IBMC), CNRS UPR3572, 67000 Strasbourg, France
| | - Jean-Louis Pasquali
- From the Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France, Institut de Biologie Moléculaire et Cellulaire (IBMC), CNRS UPR3572, 67000 Strasbourg, France, UFR Médecine, Université de Strasbourg, 67000 Strasbourg, France
| | - Sylviane Muller
- Institut de Biologie Moléculaire et Cellulaire (IBMC), CNRS UPR3572, 67000 Strasbourg, France, Institut d'Etudes Avancées, Université de Strasbourg, 67000 Strasbourg, France, and
| | - Philippe Kastner
- From the Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France, Faculté de Médecine, Université de Strasbourg, 67000 Strasbourg, France
| | - Susan Chan
- From the Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France,
| |
Collapse
|
22
|
Heizmann B, Sellars M, Macias-Garcia A, Chan S, Kastner P. Ikaros limits follicular B cell activation by regulating B cell receptor signaling pathways. Biochem Biophys Res Commun 2016; 470:714-720. [PMID: 26775846 DOI: 10.1016/j.bbrc.2016.01.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 12/30/2015] [Accepted: 01/09/2016] [Indexed: 01/14/2023]
Abstract
The Ikaros transcription factor is essential for early B cell development, but its effect on mature B cells is debated. We show that Ikaros is required to limit the response of naive splenic B cells to B cell receptor signals. Ikaros deficient follicular B cells grow larger and enter cell cycle faster after anti-IgM stimulation. Unstimulated mutant B cells show deregulation of positive and negative regulators of signal transduction at the mRNA level, and constitutive phosphorylation of ERK, p38, SYK, BTK, AKT and LYN. Stimulation results in enhanced and prolonged ERK and p38 phosphorylation, followed by hyper-proliferation. Pharmacological inhibition of ERK and p38 abrogates the increased proliferative response of Ikaros deficient cells. These results suggest that Ikaros functions as a negative regulator of follicular B cell activation.
Collapse
Affiliation(s)
- Beate Heizmann
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | - MacLean Sellars
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France; David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
| | - Alejandra Macias-Garcia
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France; Institute for Medical Engineering and Science at MIT, Cambridge, MA 02139, USA
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France.
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France; Faculté de Médecine, Université de Strasbourg, Strasbourg, France.
| |
Collapse
|
23
|
Oravecz A, Apostolov A, Polak K, Jost B, Le Gras S, Chan S, Kastner P. Ikaros mediates gene silencing in T cells through Polycomb repressive complex 2. Nat Commun 2015; 6:8823. [PMID: 26549758 PMCID: PMC4667618 DOI: 10.1038/ncomms9823] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [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: 03/19/2015] [Accepted: 10/07/2015] [Indexed: 01/06/2023] Open
Abstract
T-cell development is accompanied by epigenetic changes that ensure the silencing of stem cell-related genes and the activation of lymphocyte-specific programmes. How transcription factors influence these changes remains unclear. We show that the Ikaros transcription factor forms a complex with Polycomb repressive complex 2 (PRC2) in CD4(-)CD8(-) thymocytes and allows its binding to more than 500 developmentally regulated loci, including those normally activated in haematopoietic stem cells and others induced by the Notch pathway. Loss of Ikaros in CD4(-)CD8(-) cells leads to reduced histone H3 lysine 27 trimethylation and ectopic gene expression. Furthermore, Ikaros binding triggers PRC2 recruitment and Ikaros interacts with PRC2 independently of the nucleosome remodelling and deacetylation complex. Our results identify Ikaros as a fundamental regulator of PRC2 function in developing T cells.
Collapse
Affiliation(s)
- Attila Oravecz
- Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, Equipe Labellisée Ligue Contre le Cancer, 1 rue Laurent Fries, Illkirch 67404, France
| | - Apostol Apostolov
- Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, Equipe Labellisée Ligue Contre le Cancer, 1 rue Laurent Fries, Illkirch 67404, France
| | - Katarzyna Polak
- Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, Equipe Labellisée Ligue Contre le Cancer, 1 rue Laurent Fries, Illkirch 67404, France
| | - Bernard Jost
- IGBMC Microarray and Sequencing Platform, Illkirch 67404, France
| | | | - Susan Chan
- Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, Equipe Labellisée Ligue Contre le Cancer, 1 rue Laurent Fries, Illkirch 67404, France
| | - Philippe Kastner
- Functional Genomics and Cancer, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, Equipe Labellisée Ligue Contre le Cancer, 1 rue Laurent Fries, Illkirch 67404, France
- Faculté de Médecine, Université de Strasbourg, Strasbourg 67000, France
| |
Collapse
|
24
|
Kim HJ, Barnitz RA, Kreslavsky T, Brown FD, Moffett H, Lemieux ME, Kaygusuz Y, Meissner T, Holderried TAW, Chan S, Kastner P, Haining WN, Cantor H. Stable inhibitory activity of regulatory T cells requires the transcription factor Helios. Science 2015; 350:334-9. [PMID: 26472910 DOI: 10.1126/science.aad0616] [Citation(s) in RCA: 280] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The maintenance of immune homeostasis requires regulatory T cells (T(regs)). Given their intrinsic self-reactivity, T(regs) must stably maintain a suppressive phenotype to avoid autoimmunity. We report that impaired expression of the transcription factor (TF) Helios by FoxP3(+) CD4 and Qa-1-restricted CD8 T(regs) results in defective regulatory activity and autoimmunity in mice. Helios-deficient T(regs) develop an unstable phenotype during inflammatory responses characterized by reduced FoxP3 expression and increased effector cytokine expression secondary to diminished activation of the STAT5 pathway. CD8 T(regs) also require Helios-dependent STAT5 activation for survival and to prevent terminal T cell differentiation. The definition of Helios as a key transcription factor that stabilizes T(regs) in the face of inflammatory responses provides a genetic explanation for a core property of T(regs).
Collapse
Affiliation(s)
- Hye-Jung Kim
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA. Department of Microbiology and Immunobiology, Division of Immunology, Harvard Medical School, Boston MA
| | - R Anthony Barnitz
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA. Department of Pediatrics, Boston Children's Hospital, Boston, MA, USA
| | - Taras Kreslavsky
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA. Department of Microbiology and Immunobiology, Division of Immunology, Harvard Medical School, Boston MA
| | - Flavian D Brown
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA
| | - Howell Moffett
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA
| | | | - Yasemin Kaygusuz
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA
| | - Torsten Meissner
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA. Department of Microbiology and Immunobiology, Division of Immunology, Harvard Medical School, Boston MA
| | - Tobias A W Holderried
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA. Department of Microbiology and Immunobiology, Division of Immunology, Harvard Medical School, Boston MA
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France. Faculté de Médecine, Université de Strasbourg, Strasbourg, France
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France. Faculté de Médecine, Université de Strasbourg, Strasbourg, France
| | - W Nicholas Haining
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA. Department of Pediatrics, Boston Children's Hospital, Boston, MA, USA. Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Harvey Cantor
- Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, MA 02215, USA. Department of Microbiology and Immunobiology, Division of Immunology, Harvard Medical School, Boston MA.
| |
Collapse
|
25
|
Ammenwerth E, Woess S, Baumgartner C, Fetz B, van der Heidt A, Kastner P, Modre-Osprian R, Welte S, Poelzl G. Evaluation of an Integrated Telemonitoring Surveillance System in Patients with Coronary Heart Disease. Methods Inf Med 2015; 54:388-97. [PMID: 26395147 DOI: 10.3414/me15-02-0002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [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: 02/02/2015] [Accepted: 07/06/2015] [Indexed: 11/09/2022]
Abstract
OBJECTIVES Cardiovascular diseases are the most frequent cause of death in industrialized countries. Non-adherence with prescribed medication and recommended lifestyle changes significantly increases the risk of major cardiovascular events. The telemonitoring programme MyCor (Myokardinfarkt und Koronarstent Programm in Tirol) is a multi-modal intervention programme to improve lifestyle and medication management of patients with coronary heart disease (CHD). It includes patient education, self-monitoring with goal-setting and feedback, and regular clinical visits. We evaluated the MyCor telemonitoring programme regarding technical feasibility, user acceptance, patient adherence, change in health status, and change in quality of life. METHODS A 4½-month study was conducted with two telemonitoring phases and one interim phase. The study comprised patient surveys, standardized assessment of quality of life using the MacNew questionnaire at study entry and after 4 and 18 weeks, analysis of adherence to medication and physical activity during the two telemonitoring phases, and analysis of reached goals regarding health conditions during the telemonitoring phases. RESULTS Twenty-five patients (mean age: 63 years) participated in the study. Patients showed a high acceptance of the MyCor telemonitoring programme. Patients reported feelings of self-control, motivation for lifestyle changes, and improved quality of life. Adherence to daily measurements was high with 86% and 77% in the two telemonitoring phases. Adherence to medication was also high with up to 87% and 80%. Pre-defined goals for physical activity were reached in up to 86% and 73% of days, respectively. Quality of life improved from 5.5 at study entry to 6.3 at the end (p< 0.01; MacNew questionnaire). Reductions in blood pressure and heart rate or an improvement in reaching defined goals could not be observed. CONCLUSIONS The MyCor telemonitoring programme Tirol for CHD patients has a high rate of acceptance among included patients. Critical evaluation revealed subjective benefits regarding quality of life and health status as well as high adherence rates to medication and lifestyle changes. Achieving long-term adherence and verifying clinical outcomes, however, remains an open issue. Our findings will promote further studies, addressing different strategies for an optimal mix of patient education, telemonitoring, feedback, and clinical follow-ups.
Collapse
Affiliation(s)
- E Ammenwerth
- Elske Ammenwerth, Institute of Biomedical Informatics, UMIT - University for Health Sciences, Medical Informatics and Technology, Eduard Wallnöfer Zentrum 1, 6060 Hall in Tirol, Austria, E-mail:
| | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Geimer Le Lay AS, Oravecz A, Mastio J, Jung C, Marchal P, Ebel C, Dembélé D, Jost B, Le Gras S, Thibault C, Borggrefe T, Kastner P, Chan S. The tumor suppressor Ikaros shapes the repertoire of notch target genes in T cells. Sci Signal 2014; 7:ra28. [PMID: 24643801 DOI: 10.1126/scisignal.2004545] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The Notch signaling pathway is activated in many cell types, but its effects are cell type- and stage-specific. In the immune system, Notch activity is required for the differentiation of T cell progenitors, but it is reduced in more mature thymocytes, in which Notch is oncogenic. Studies based on single-gene models have suggested that the tumor suppressor protein Ikaros plays an important role in repressing the transcription of Notch target genes. We used genome-wide analyses, including chromatin immunoprecipitation sequencing, to identify genes controlled by Notch and Ikaros in gain- and loss-of-function experiments. We found that Ikaros bound to and directly repressed the expression of most genes that are activated by Notch. Specific deletion of Ikaros in thymocytes led to the persistent expression of Notch target genes that are essential for T cell maturation, as well as the rapid development of T cell leukemias in mice. Expression of Notch target genes that are normally silent in T cells, but are activated by Notch in other cell types, occurred in T cells of mice genetically deficient in Ikaros. We propose that Ikaros shapes the timing and repertoire of the Notch transcriptional response in T cells through widespread targeting of elements adjacent to Notch regulatory sequences. These results provide a molecular framework for understanding the regulation of tissue-specific and tumor-related Notch responses.
Collapse
Affiliation(s)
- Anne-Solen Geimer Le Lay
- 1Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Dembélé D, Kastner P. Fold change rank ordering statistics: a new method for detecting differentially expressed genes. BMC Bioinformatics 2014; 15:14. [PMID: 24423217 PMCID: PMC3899927 DOI: 10.1186/1471-2105-15-14] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 12/27/2013] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Different methods have been proposed for analyzing differentially expressed (DE) genes in microarray data. Methods based on statistical tests that incorporate expression level variability are used more commonly than those based on fold change (FC). However, FC based results are more reproducible and biologically relevant. RESULTS We propose a new method based on fold change rank ordering statistics (FCROS). We exploit the variation in calculated FC levels using combinatorial pairs of biological conditions in the datasets. A statistic is associated with the ranks of the FC values for each gene, and the resulting probability is used to identify the DE genes within an error level. The FCROS method is deterministic, requires a low computational runtime and also solves the problem of multiple tests which usually arises with microarray datasets. CONCLUSION We compared the performance of FCROS with those of other methods using synthetic and real microarray datasets. We found that FCROS is well suited for DE gene identification from noisy datasets when compared with existing FC based methods.
Collapse
Affiliation(s)
- Doulaye Dembélé
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg, 67404 Illkirch, France.
| | | |
Collapse
|
28
|
Abstract
Ikaros is essential for pre-BCR down-regulation, Igκ germline transcription, Ig light chain recombination, and pre-B cell differentiation, in part by antagonizing IL-7–dependent gene regulation. Pre-B cell receptor (pre-BCR) signaling and migration from IL-7–rich environments cooperate to drive pre-B cell differentiation via transcriptional programs that remain unclear. We show that the Ikaros transcription factor is required for the differentiation of large pre-B to small pre-B cells. Mice deleted for Ikaros in pro/pre-B cells show a complete block of differentiation at the fraction C′ stage, and Ikaros-null pre-B cells cannot differentiate upon withdrawal of IL-7 in vitro. Restoration of Ikaros function rescues pre-B cell differentiation in vitro and in vivo and depends on DNA binding. Ikaros is required for the down-regulation of the pre-BCR, Igκ germline transcription, and Ig L chain recombination. Furthermore, Ikaros antagonizes the IL-7–dependent regulation of >3,000 genes, many of which are up- or down-regulated between fractions C′ and D. Affected genes include those important for survival, metabolism, B cell signaling, and function, as well as transcriptional regulators like Ebf1, Pax5, and the Foxo1 family. Our data thus identify Ikaros as a central regulator of IL-7 signaling and pre-B cell development.
Collapse
Affiliation(s)
- Beate Heizmann
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Institut National de la Santé et de la Recherche Médicale U964, Centre National de la Recherche Scientifique UMR7104, Université de Strasbourg, 67404 Illkirch, France
| | | | | |
Collapse
|
29
|
Modre-Osprian R, Hayn D, Kastner P, Schreier G. Mhealth Supporting Dynamic Medication Management during Home Monitoring of Heart Failure Patients. ACTA ACUST UNITED AC 2013; 58 Suppl 1:/j/bmte.2013.58.issue-s1-K/bmt-2013-4251/bmt-2013-4251.xml. [PMID: 24042906 DOI: 10.1515/bmt-2013-4251] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
30
|
Kastner P, Dupuis A, Gaub MP, Herbrecht R, Lutz P, Chan S. Function of Ikaros as a tumor suppressor in B cell acute lymphoblastic leukemia. Am J Blood Res 2013; 3:1-13. [PMID: 23358883 PMCID: PMC3555193] [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] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 01/06/2013] [Indexed: 06/01/2023]
Abstract
The Ikaros transcription factor is crucial for many aspects of hematopoiesis. Loss of function mutations in IKZF1, the gene encoding Ikaros, have been implicated in adult and pediatric B cell acute lymphoblastic leukemia (B-ALL). These mutations result in haploinsufficiency of the Ikaros gene in approximately half of the cases. The remaining cases contain more severe or compound mutations that lead to the generation of dominant-negative proteins or complete loss of function. All IKZF1 mutations are associated with a poor prognosis. Here we review the current genetic, clinical and mechanistic evidence for the role of Ikaros as a tumor suppressor in B-ALL.
Collapse
Affiliation(s)
- Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg67404 Illkirch, France
- Université de Strasbourg, Faculté de MédecineStrasbourg, France
| | - Arnaud Dupuis
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg67404 Illkirch, France
- Hôpital de Hautepierre, Hôpitaux Universitaires de StrasbourgAvenue Molière, 67100 Strasbourg, France
| | - Marie-Pierre Gaub
- Université de Strasbourg, Faculté de MédecineStrasbourg, France
- Hôpital de Hautepierre, Hôpitaux Universitaires de StrasbourgAvenue Molière, 67100 Strasbourg, France
- Plate-forme Régionale INCa de Génétique Moléculaire des Cancers d’AlsaceAvenue Molière, 67098 Strasbourg, France
| | - Raoul Herbrecht
- Université de Strasbourg, Faculté de MédecineStrasbourg, France
- Hôpital de Hautepierre, Hôpitaux Universitaires de StrasbourgAvenue Molière, 67100 Strasbourg, France
| | - Patrick Lutz
- Université de Strasbourg, Faculté de MédecineStrasbourg, France
- Hôpital de Hautepierre, Hôpitaux Universitaires de StrasbourgAvenue Molière, 67100 Strasbourg, France
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR 7104, Université de Strasbourg67404 Illkirch, France
| |
Collapse
|
31
|
Fu W, Ergun A, Lu T, Hill JA, Haxhinasto S, Fassett MS, Gazit R, Adoro S, Glimcher L, Chan S, Kastner P, Rossi D, Collins JJ, Mathis D, Benoist C. A multiply redundant genetic switch 'locks in' the transcriptional signature of regulatory T cells. Nat Immunol 2012; 13:972-80. [PMID: 22961053 PMCID: PMC3698954 DOI: 10.1038/ni.2420] [Citation(s) in RCA: 214] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Accepted: 08/13/2012] [Indexed: 12/13/2022]
Abstract
The transcription factor FoxP3 partakes dominantly in the specification and function of FoxP3+CD4+ T regulatory cells (Tregs), but is neither strictly necessary nor sufficient to determine the characteristic Treg signature. Computational network inference and experimental testing assessed the contribution of other transcription factors (TF). Enforced expression of Helios or Xbp1 elicited specific signatures, but Eos, Irf4, Satb1, Lef1 and Gata1 elicited exactly the same outcome, synergizing with FoxP3 to activate most of the Treg signature, including key TFs, and enhancing FoxP3 occupancy at its genomic targets. Conversely, the Treg signature was robust to inactivation of any single cofactor. A redundant genetic switch thus locks-in the Treg phenotype, a model which accounts for several aspects of Treg physiology, differentiation and stability.
Collapse
Affiliation(s)
- Wenxian Fu
- Division of Immunology, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Martín-Ibáñez R, Crespo E, Esgleas M, Urban N, Wang B, Waclaw R, Georgopoulos K, Martínez S, Campbell K, Vicario-Abejón C, Alberch J, Chan S, Kastner P, Rubenstein JL, Canals JM. Helios transcription factor expression depends on Gsx2 and Dlx1&2 function in developing striatal matrix neurons. Stem Cells Dev 2012; 21:2239-51. [PMID: 22142223 DOI: 10.1089/scd.2011.0607] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Development of the nervous system is finely regulated by consecutive expression of cell-specific transcription factors. Here we show that Helios, a member of the Ikaros transcription factor family, is expressed in ectodermal and neuroectodermal-derived tissues. During embryonic development, Helios is expressed by several brain structures including the lateral ganglionic eminence (LGE, the striatal anlage); the cingulated, insular and retrosplenial cortex; the hippocampus; and the accessory olfactory bulb. Moreover, Helios is also expressed by Purkinje neurons during postnatal cerebellar development. Within the LGE, Helios expression follows a dynamic spatio-temporal pattern starting at embryonic stages (E14.5), peaking at E18.5, and completely disappearing during postnatal development. Helios is expressed by a small population of nestin-positive neural progenitor cells located in the subventricular zone as well as by a larger population of immature neurons distributed throughout the mantle zone. In the later, Helios is preferentially expressed in the matrix compartment, where it colocalizes with Bcl11b and Foxp1, well-known markers of striatal projection neurons. In addition, we observed that Helios expression is not detected in Dlx1/2 and Gsx2 null mutants, while its expression is maintained in Ascl1 mutants. These findings allow us to introduce a new transcription factor in the cascade of events that take part of striatal development postulating the existence of at least 4 different neural progenitors in the LGE. An Ascl1-independent but Gsx2- & Dlx1/2-dependent precursor will express Helios defining a new lineage for a subset of matrix striatal neurons.
Collapse
Affiliation(s)
- Raquel Martín-Ibáñez
- Department of Cell Biology, Immunology and Neuroscience, and Cell Therapy Program, Faculty of Medicine, Institut d'Investigacions Biomèdiques August Pi i Sunyer-IDIBAPS, University of Barcelona, Barcelona, Spain
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Abstract
The zinc finger transcription factor, Ikaros, is a central regulator of hematopoiesis. It is required for the development of the earliest B cell progenitors and at later stages for VDJ recombination and B cell receptor expression. Mature B cells rely on Ikaros to set the activation threshold for various stimuli, and to choose the correct antibody isotype during class switch recombination. Thus, Ikaros contributes to nearly every level of B cell differentiation and function.
Collapse
Affiliation(s)
- Maclean Sellars
- MacLean Sellars, New York University School of Medicine, New York, NY 10016, United States
| | | | | |
Collapse
|
34
|
Abstract
Ikaros is a zinc finger transcriptional regulator encoded by the Ikzf1 gene. Ikaros displays crucial functions in the hematopoietic system and its loss of function has been linked to the development of lymphoid leukemia. In particular, Ikaros has been found in recent years to be a major tumor suppressor involved in human B-cell acute lymphoblastic leukemia. Its role in T-cell leukemia, however, has been more controversial. While Ikaros deficiency appears to be very frequent in murine T-cell leukemias, loss of Ikaros appears to be rare in human T-cell acute lymphoblastic leukemia (T-ALL). We review here the evidence linking Ikaros to T-ALL in mouse and human systems.
Collapse
Affiliation(s)
- Philippe Kastner
- Philippe Kastner, Susan Chan, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch 67400, France
| | | |
Collapse
|
35
|
Serre K, Bénézech C, Desanti G, Bobat S, Toellner KM, Bird R, Chan S, Kastner P, Cunningham AF, MacLennan ICM, Mohr E. Helios is associated with CD4 T cells differentiating to T helper 2 and follicular helper T cells in vivo independently of Foxp3 expression. PLoS One 2011; 6:e20731. [PMID: 21677778 PMCID: PMC3108993 DOI: 10.1371/journal.pone.0020731] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Accepted: 05/10/2011] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Although in vitro IL-4 directs CD4 T cells to produce T helper 2 (Th2)-cytokines, these cytokines can be induced in vivo in the absence of IL-4-signalling. Thus, mechanism(s), different from the in vitro pathway for Th2-induction, contribute to in vivo Th2-differentiation. The pathway for in vivo IL-4-independent Th2-differentiation has yet to be characterized. FINDINGS Helios (ikzf2), a member of the Ikaros transcription regulator family, is expressed in thymocytes and some antigen-matured T cells as well as in regulatory T cells. It has been proposed that Helios is a specific marker for thymus-derived regulatory T cells. Here, we show that mouse ovalbumin-specific CD4 (OTII) cells responding to alum-precipitated ovalbumin (alumOVA) upregulate Th2 features - GATA-3 and IL-4 - as well as Helios mRNA and protein. Helios is also upregulated in follicular helper T (TFh) cells in this response. By contrast, OTII cells responding to the Th1 antigen - live attenuated ovalbumin-expressing Salmonella - upregulate Th1 features - T-bet and IFN-γ - but not Helios. In addition, CD4 T cells induced to produce Th2 cytokines in vitro do not express Helios. The kinetics of Helios mRNA and protein induction mirrors that of GATA-3. The induction of IL-4, IL-13 and CXCR5 by alumOVA requires NF-κB1 and this is also needed for Helios upregulation. Importantly, Helios is induced in Th2 and TFh cells without parallel upregulation of Foxp3. These findings suggested a key role for Helios in Th2 and TFh development in response to alum-protein vaccines. We tested this possibility using Helios-deficient OTII cells and found this deficiency had no discernable impact on Th2 and TFh differentiation in response to alumOVA. CONCLUSIONS Helios is selectively upregulated in CD4 T cells during Th2 and TFh responses to alum-protein vaccines in vivo, but the functional significance of this upregulation remains uncertain.
Collapse
Affiliation(s)
- Karine Serre
- School of Immunity and Infection, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Birmingham, England, United Kingdom
- * E-mail: (KS); (ICMM); (EM)
| | - Cécile Bénézech
- School of Immunity and Infection, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Birmingham, England, United Kingdom
| | - Guillaume Desanti
- School of Immunity and Infection, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Birmingham, England, United Kingdom
| | - Saeeda Bobat
- School of Immunity and Infection, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Birmingham, England, United Kingdom
| | - Kai-Michael Toellner
- School of Immunity and Infection, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Birmingham, England, United Kingdom
| | - Roger Bird
- School of Immunity and Infection, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Birmingham, England, United Kingdom
| | - Susan Chan
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM Unité 964, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7104, Université de Strasbourg, Strasbourg, France
| | - Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM Unité 964, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7104, Université de Strasbourg, Strasbourg, France
| | - Adam F. Cunningham
- School of Immunity and Infection, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Birmingham, England, United Kingdom
| | - Ian C. M. MacLennan
- School of Immunity and Infection, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Birmingham, England, United Kingdom
- * E-mail: (KS); (ICMM); (EM)
| | - Elodie Mohr
- School of Immunity and Infection, MRC Centre for Immune Regulation, Institute for Biomedical Research, University of Birmingham, Birmingham, England, United Kingdom
- * E-mail: (KS); (ICMM); (EM)
| |
Collapse
|
36
|
Grasser B, Iberer F, Schaffellner S, Kniepeiss D, Schreier G, Kastner P, Tscheliessnigg KH. Non-invasive graft monitoring after heart transplantation: rationale to reduce the number of endomyocardial biopsies. Transpl Int 2011. [DOI: 10.1111/j.1432-2277.2000.tb02024.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
37
|
Kastner P, Chan S, Vogel WK, Zhang LJ, Topark-Ngarm A, Golonzhka O, Jost B, Le Gras S, Gross MK, Leid M. Bcl11b represses a mature T-cell gene expression program in immature CD4(+)CD8(+) thymocytes. Eur J Immunol 2010; 40:2143-54. [PMID: 20544728 DOI: 10.1002/eji.200940258] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Bcl11b is a transcription factor that, within the hematopoietic system, is expressed specifically in T cells. Although Bcl11b is required for T-cell differentiation in newborn Bcl11b-null mice, and for positive selection in the adult thymus of mice bearing a T-cell-targeted deletion, the gene network regulated by Bcl11b in T cells is unclear. We report herein that Bcl11b is a bifunctional transcriptional regulator, which is required for the correct expression of approximately 1000 genes in CD4(+)CD8(+)CD3(lo) double-positive (DP) thymocytes. Bcl11b-deficient DP cells displayed a gene expression program associated with mature CD4(+)CD8(-) and CD4(-)CD8(+) single-positive (SP) thymocytes, including upregulation of key transcriptional regulators, such as Zbtb7b and Runx3. Bcl11b interacted with regulatory regions of many dysregulated genes, suggesting a direct role in the transcriptional regulation of these genes. However, inappropriate expression of lineage-associated genes did not result in enhanced differentiation, as deletion of Bcl11b in DP cells prevented development of SP thymocytes, and that of canonical NKT cells. These data establish Bcl11b as a crucial transcriptional regulator in thymocytes, in which Bcl11b functions to prevent the premature expression of genes fundamental to the SP and NKT cell differentiation programs.
Collapse
Affiliation(s)
- Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U964, CNRS UMR7104, Université de Strasbourg, Illkirch, France.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Kastner P, Morak J, Modre R, Kollmann A, Ebner C, Fruhwald F, Schreier G. Innovative telemonitoring system for cardiology: from science to routine operation. Appl Clin Inform 2010; 1:165-76. [PMID: 23616835 DOI: 10.4338/aci-2009-12-ra-0021] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [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: 12/10/2009] [Accepted: 06/04/2010] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE Results of the Austrian MOBITEL (MOBIle phone based TELemonitoring for heart failure patients) trial indicate that home-based telemonitoring improves outcome of chronic heart failure (CHF) patients and reduces both frequency and duration of hospitalizations. Based on lessons learned, we assessed the weak points to clear the way for routine operations. METHODS We analyzed the system with respect to recommendations of the ESC Guidelines and experiences gained throughout the trial to identify potential improvements. The following components have been identified: a patient terminal with highest usability, integrated way to document drug-intake and well-being, and automated event detection for worsening of CHF. As a consequence the system was extended by Near Field Communication (NFC) technology and by an event management tool. RESULTS Usability evaluation with 30 adults (14f, median 51y. IQR[45-65]) showed that 21 (8f) were able to immediately operate the system after reading a step-by-step manual. Eight (6f) needed one time demonstration and one man (80y) failed to operate the blood pressure meter. Routine operation of the revised system started in March 2009. Within 9 months, 15 patients (4f, median 74y. IQR[71-83], all NYHA-III) transmitted 17,149 items. 43 events were detected because of body weight gain of more then 2kg within 2 days. 49 therapy adjustments were documented. Three patients stopped using the system, two (1f) because of non-compliance and one (m, 82y) because of death. Overall, the rate of adherence to daily data transfer was 78%. CONCLUSION First results confirm the applicability of the revised telemonitoring system in routine operation.
Collapse
Affiliation(s)
- P Kastner
- Safety & Security Department, AIT Austrian Institute of Technology GmbH , Graz, Austria
| | | | | | | | | | | | | |
Collapse
|
39
|
Virely C, Moulin S, Cobaleda C, Lasgi C, Alberdi A, Soulier J, Sigaux F, Chan S, Kastner P, Ghysdael J. Haploinsufficiency of the IKZF1 (IKAROS) tumor suppressor gene cooperates with BCR-ABL in a transgenic model of acute lymphoblastic leukemia. Leukemia 2010; 24:1200-4. [DOI: 10.1038/leu.2010.63] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
40
|
Kastner P, Schreier G, Pusch W, Scherr D, Fruhwald F, Zweiker R, Klein W. EIN TELEMONITORING-SYSTEM FÜR PATIENTEN MIT HERZINSUFFIZIENZ. BIOMED ENG-BIOMED TE 2009. [DOI: 10.1515/bmte.2003.48.s1.136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
41
|
Marçais A, Jeannet R, Hernandez L, Soulier J, Sigaux F, Chan S, Kastner P. Genetic inactivation of Ikaros is a rare event in human T-ALL. Leuk Res 2009; 34:426-9. [PMID: 19796813 DOI: 10.1016/j.leukres.2009.09.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Revised: 09/08/2009] [Accepted: 09/09/2009] [Indexed: 11/18/2022]
Abstract
The Ikaros (Ikzf1) gene, encoding a transcription regulator, is a major tumor suppressor in B-cell acute lymphoblastic leukemia (B-ALL). In the mouse, however, loss of Ikaros is primarily associated with T-ALL development. Whether Ikaros is also implicated in human T-ALL remains unclear. We studied Ikaros in 25 human T-ALL samples from diverse molecular subtypes at the mRNA, protein, sequence and genomic copy number level. We found that Ikaros was abnormal in only one sample: one allele was lost by genomic deletion, while proteins generated from the remaining allele were delocalized and concentrated at a single cytoplasmic structure. Thus, inactivation of Ikaros by deletion or mutation is rare in human T-ALL.
Collapse
Affiliation(s)
- Ambroise Marçais
- Department of Cancer Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France
| | | | | | | | | | | | | |
Collapse
|
42
|
Sarrazin S, Mossadegh-Keller N, Fukao T, Aziz A, Mourcin F, Vanhille L, Kelly Modis L, Kastner P, Chan S, Duprez E, Otto C, Sieweke MH. MafB restricts M-CSF-dependent myeloid commitment divisions of hematopoietic stem cells. Cell 2009; 138:300-13. [PMID: 19632180 DOI: 10.1016/j.cell.2009.04.057] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2008] [Revised: 02/18/2009] [Accepted: 04/24/2009] [Indexed: 10/20/2022]
Abstract
While hematopoietic stem cell (HSC) self-renewal is well studied, it remains unknown whether distinct control mechanisms enable HSC divisions that generate progeny cells with specific lineage bias. Here, we report that the monocytic transcription factor MafB specifically restricts the ability of M-CSF to instruct myeloid commitment divisions in HSCs. MafB deficiency specifically enhanced sensitivity to M-CSF and caused activation of the myeloid master-regulator PU.1 in HSCs in vivo. Single-cell analysis revealed that reduced MafB levels enabled M-CSF to instruct divisions producing asymmetric daughter pairs with one PU.1(+) cell. As a consequence, MafB(-/-) HSCs showed a PU.1 and M-CSF receptor-dependent competitive repopulation advantage specifically in the myelomonocytic, but not T lymphoid or erythroid, compartment. Lineage-biased repopulation advantage was progressive, maintained long term, and serially transplantable. Together, this indicates that an integrated transcription factor/cytokine circuit can control the rate of specific HSC commitment divisions without compromising other lineages or self-renewal.
Collapse
Affiliation(s)
- Sandrine Sarrazin
- Centre d'Immunologie de Marseille-Luminy, Université Aix-Marseille, Campus de Luminy, Case 906, 13288 Marseille Cedex 09, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Cai Q, Dierich A, Oulad-Abdelghani M, Chan S, Kastner P. Helios deficiency has minimal impact on T cell development and function. J Immunol 2009; 183:2303-11. [PMID: 19620299 DOI: 10.4049/jimmunol.0901407] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Helios is a member of the Ikaros family of zinc finger transcription factors. It is expressed mainly in T cells, where it associates with Ikaros-containing complexes and has been proposed to act as a rate-limiting factor for Ikaros function. Overexpression of wild-type or dominant-negative Helios isoforms profoundly alters alphabeta T cell differentiation and activation, and endogenous Helios is expressed at strikingly high levels in regulatory T cells. Helios has also been implicated as a tumor suppressor in human T cell acute lymphoblastic leukemias. These studies suggest a central role for Helios in T cell development and homeostasis, but whether this protein is physiologically required in T cells is unclear. We report herein that inactivation of the Helios gene by homologous recombination does not impair the differentiation and effector cell function of alphabeta and gammadelta T cells, NKT cells, and regulatory T cells. These results suggest that Helios is not essential for T cells, and that its function can be compensated for by other members of the Ikaros family.
Collapse
Affiliation(s)
- Qi Cai
- Department of Cancer Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM Unité 964, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7104, Illkirch, France
| | | | | | | | | |
Collapse
|
44
|
Sellars M, Reina-San-Martin B, Kastner P, Chan S. Ikaros controls isotype selection during immunoglobulin class switch recombination. J Biophys Biochem Cytol 2009. [DOI: 10.1083/jcb1854oia10] [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: 11/22/2022] Open
|
45
|
Sellars M, Reina-San-Martin B, Kastner P, Chan S. Ikaros controls isotype selection during immunoglobulin class switch recombination. ACTA ACUST UNITED AC 2009; 206:1073-87. [PMID: 19414557 PMCID: PMC2715033 DOI: 10.1084/jem.20082311] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Class switch recombination (CSR) allows the humoral immune response to exploit different effector pathways through specific secondary antibody isotypes. However, the molecular mechanisms and factors that control immunoglobulin (Ig) isotype choice for CSR are unclear. We report that deficiency for the Ikaros transcription factor results in increased and ectopic CSR to IgG2b and IgG2a, and reduced CSR to all other isotypes, regardless of stimulation. Ikaros suppresses active chromatin marks, transcription, and activation-induced cytidine deaminase (AID) accessibility at the γ2b and γ2a genes to inhibit class switching to these isotypes. Further, Ikaros directly regulates isotype gene transcription as it directly binds the Igh 3′ enhancer and interacts with isotype gene promoters. Finally, Ikaros-mediated repression of γ2b and γ2a transcription promotes switching to other isotype genes by allowing them to compete for AID-mediated recombination at the single-cell level. Thus, our results reveal transcriptional competition between constant region genes in individual cells to be a critical and general mechanism for isotype specification during CSR. We show that Ikaros is a master regulator of this competition.
Collapse
Affiliation(s)
- MacLean Sellars
- Laboratory of Hematopoiesis and Leukemogenesis, and Department of Cancer Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire, 67400 Illkirch, France
| | | | | | | |
Collapse
|
46
|
Wolf AI, Buehler D, Hensley SE, Cavanagh LL, Wherry EJ, Kastner P, Chan S, Weninger W. Plasmacytoid dendritic cells are dispensable during primary influenza virus infection. J Immunol 2009; 182:871-9. [PMID: 19124730 DOI: 10.4049/jimmunol.182.2.871] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Plasmacytoid dendritic cells (pDC) are thought to be pivotal in the first line of defense against viral infections. Although previous studies have suggested that pDC regulate the immune response against respiratory syncytial virus, their role in pulmonary infection with influenza virus has remained unclear. Using mice with GFP-tagged pDC, we observed a marked increase in pDC numbers in the lung airways 3 days after intranasal infection with influenza virus A/PR/8/34. To further investigate their potential involvement in the disease, we made use of pDC-deficient IkarosL/L mice. In the absence of pDC, the recruitment of T cells to the bronchoalveolar space was delayed, which could be reversed by the adoptive transfer of pDC before infection. Surprisingly, however, when compared with wild-type animals, IkarosL/L mice revealed a similar course of disease, as determined by weight loss, viral titers, levels of neutralizing Ab, and lung pathology. Moreover, the activation and differentiation of influenza-specific CD8+ effector T cells was unaltered in the absence of pDC, as was the generation of CD8+ memory T cells. Taken together, our study suggests that pDC regulate the accumulation of T cells in the bronchoalveolar space during early influenza virus infection, but are dispensable for the control of this disease.
Collapse
Affiliation(s)
- Amaya I Wolf
- Immunology Program, The Wistar Institute, Philadelphia, PA 19104, USA
| | | | | | | | | | | | | | | |
Collapse
|
47
|
Arinobu Y, Mizuno SI, Chong Y, Shigematsu H, Iino T, Iwasaki H, Graf T, Mayfield R, Chan S, Kastner P, Akashi K. Reciprocal activation of GATA-1 and PU.1 marks initial specification of hematopoietic stem cells into myeloerythroid and myelolymphoid lineages. Cell Stem Cell 2008; 1:416-27. [PMID: 18371378 DOI: 10.1016/j.stem.2007.07.004] [Citation(s) in RCA: 236] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2007] [Revised: 07/05/2007] [Accepted: 07/10/2007] [Indexed: 12/18/2022]
Abstract
A hierarchical hematopoietic development with myeloid versus lymphoid bifurcation has been proposed downstream of the multipotent progenitor (MPP) stage, based on prospective isolation of progenitors capable of generating only myeloerythroid cells (common myeloid progenitor, CMP) or only lymphocytes (common lymphoid progenitor, CLP). By utilizing GATA-1 and PU.1 transcription factor reporters, here we identified progenitor populations that are precursors for either CMPs or CLPs. Two independent populations expressing either GATA-1 or PU.1 resided within the CD34(+)Sca-1(+)c-Kit(+) MPP fraction. The GATA-1(+) MPP displayed potent myeloerythroid potential without giving rise to lymphocytes, whereas the PU.1(+) MPP showed granulocyte/monocyte/lymphoid-restricted progenitor activity without megakaryocyte/erythroid differentiation. Furthermore, GATA-1(+) and PU.1(+) MPPs possessed huge expansion potential and differentiated into the original CMPs and CLPs, respectively. Thus, the reciprocal activation of GATA-1 and PU.1 primarily organizes the hematopoietic lineage fate decision to form the earliest hematopoietic branchpoint that comprises isolatable myeloerythroid and myelolymphoid progenitor populations.
Collapse
Affiliation(s)
- Yojiro Arinobu
- Department of Cancer Immunology and AIDS, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Kollmann A, Hayn D, Garcia J, Kastner P, Rotman B, Tscheliessnigg KH, Schreier G. Initial experiences with a telemedicine framework for remote pacemaker follow-up. Conf Proc IEEE Eng Med Biol Soc 2008; 2006:5218-21. [PMID: 17946290 DOI: 10.1109/iembs.2006.259413] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
According to international guidelines implanted cardiac pacemakers (PM) have to be checked periodically to ensure that they are working correctly. To spare a significant number of patients the burden of traveling to specialized PM clinics a telemedicine framework has been developed prototypically. A mobile, personal digital assistant (PDA) based PM follow-up unit provides the caregiver at the point-of-care with the necessary infrastructure to perform a basic PM follow-up examination remotely. In case of detected malfunction of the PM the patient is ordered to the hospital for further examination. The system has been evaluated in a clinical pilot trial on 44 patients with a total of 23 different PM models from 8 different manufacturers. The initial results indicate the potential of the concept to work as an efficient, manufacturer independent screening method with the ultimate goal to increase the safety, quality and efficiency of PM therapy.
Collapse
Affiliation(s)
- A Kollmann
- ARC Seibersdorf Research GmbH, eHealth systems, Graz, Austria.
| | | | | | | | | | | | | |
Collapse
|
49
|
Robbins SH, Walzer T, Dembélé D, Thibault C, Defays A, Bessou G, Xu H, Vivier E, Sellars M, Pierre P, Sharp FR, Chan S, Kastner P, Dalod M. Novel insights into the relationships between dendritic cell subsets in human and mouse revealed by genome-wide expression profiling. Genome Biol 2008; 9:R17. [PMID: 18218067 PMCID: PMC2395256 DOI: 10.1186/gb-2008-9-1-r17] [Citation(s) in RCA: 403] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Revised: 12/19/2007] [Accepted: 01/24/2008] [Indexed: 12/31/2022] Open
Abstract
Genome-wide expression profiling of mouse and human leukocytes reveal conserved transcriptional programs of plasmacytoid or conventional dendritic cell subsets. Background Dendritic cells (DCs) are a complex group of cells that play a critical role in vertebrate immunity. Lymph-node resident DCs (LN-DCs) are subdivided into conventional DC (cDC) subsets (CD11b and CD8α in mouse; BDCA1 and BDCA3 in human) and plasmacytoid DCs (pDCs). It is currently unclear if these various DC populations belong to a unique hematopoietic lineage and if the subsets identified in the mouse and human systems are evolutionary homologs. To gain novel insights into these questions, we sought conserved genetic signatures for LN-DCs and in vitro derived granulocyte-macrophage colony stimulating factor (GM-CSF) DCs through the analysis of a compendium of genome-wide expression profiles of mouse or human leukocytes. Results We show through clustering analysis that all LN-DC subsets form a distinct branch within the leukocyte family tree, and reveal a transcriptomal signature evolutionarily conserved in all LN-DC subsets. Moreover, we identify a large gene expression program shared between mouse and human pDCs, and smaller conserved profiles shared between mouse and human LN-cDC subsets. Importantly, most of these genes have not been previously associated with DC function and many have unknown functions. Finally, we use compendium analysis to re-evaluate the classification of interferon-producing killer DCs, lin-CD16+HLA-DR+ cells and in vitro derived GM-CSF DCs, and show that these cells are more closely linked to natural killer and myeloid cells, respectively. Conclusion Our study provides a unique database resource for future investigation of the evolutionarily conserved molecular pathways governing the ontogeny and functions of leukocyte subsets, especially DCs.
Collapse
Affiliation(s)
- Scott H Robbins
- CIML (Centre d'Immunologie de Marseille-Luminy), Université de la Méditerranée, Parc scientifique de Luminy case 906, Marseille F-13288, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Kastner P, Chan S. PU.1: A crucial and versatile player in hematopoiesis and leukemia. Int J Biochem Cell Biol 2008; 40:22-7. [PMID: 17374502 DOI: 10.1016/j.biocel.2007.01.026] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2006] [Revised: 01/29/2007] [Accepted: 01/30/2007] [Indexed: 11/26/2022]
Abstract
Purine Rich Box-1 (PU.1)/ SFFV Proviral Integration Site-1 (Spi-1) is an Ets-family transcription factor, which was first characterized as an oncogene in Friend's murine erythroleukemia, and subsequently, as a transcriptional regulator of myeloid promoters. PU.1 has since emerged as a central regulator of all hematopoietic cell lineages. PU.1 is essential for terminal myeloid cell differentiation, B and T cell development, erythropoiesis and hematopoietic stem cell maintenance. These pleiotropic functions are reflected by its complex and dynamic expression pattern during hematopoiesis. Factors regulating this complex expression are only beginning to be revealed. Interestingly, recent work has provided strong evidence that suppression of PU.1 function is critical for the leukemic transformation of myeloid cells, both in mouse and man. Thus PU.1 is a multi-faceted protein that controls numerous normal and pathogenic functions within the hematopoietic system.
Collapse
MESH Headings
- Animals
- Cell Transformation, Neoplastic
- Gene Expression Regulation, Leukemic
- Hematopoiesis/genetics
- Hematopoiesis/physiology
- Humans
- Leukemia, Erythroblastic, Acute/genetics
- Leukemia, Erythroblastic, Acute/metabolism
- Leukemia, Erythroblastic, Acute/pathology
- Leukemia, Myeloid/genetics
- Leukemia, Myeloid/metabolism
- Leukemia, Myeloid/pathology
- Mice
- Mice, Knockout
- Proto-Oncogene Proteins/chemistry
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/metabolism
- Proto-Oncogene Proteins c-ets/chemistry
- Proto-Oncogene Proteins c-ets/genetics
- Proto-Oncogene Proteins c-ets/metabolism
- Spleen Focus-Forming Viruses
- Trans-Activators/chemistry
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Transcriptional Activation
- Tumor Suppressor Proteins/genetics
Collapse
Affiliation(s)
- Philippe Kastner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch F-67400, France.
| | | |
Collapse
|