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Solanki A, Yánez DC, Lau CI, Rowell J, Barbarulo A, Ross S, Sahni H, Crompton T. The transcriptional repressor Bcl6 promotes pre-TCR-induced thymocyte differentiation and attenuates Notch1 activation. Development 2020; 147:dev.192203. [PMID: 32907850 DOI: 10.1242/dev.192203] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 04/28/2020] [Accepted: 08/06/2020] [Indexed: 12/12/2022]
Abstract
Pre-T-cell receptor (TCR) signal transduction is required for developing thymocytes to differentiate from CD4-CD8- double-negative (DN) cell to CD4+CD8+ double-positive (DP) cell. Notch signalling is required for T-cell fate specification and must be maintained throughout β-selection, but inappropriate Notch activation in DN4 and DP cells is oncogenic. Here, we show that pre-TCR signalling leads to increased expression of the transcriptional repressor Bcl6 and that Bcl6 is required for differentiation to DP. Conditional deletion of Bcl6 from thymocytes reduced pre-TCR-induced differentiation to DP cells, disrupted expansion and enrichment of intracellular TCRβ+ cells within the DN population and increased DN4 cell death. Deletion also increased Notch1 activation and Notch-mediated transcription in the DP population. Thus, Bcl6 is required in thymocyte development for efficient differentiation from DN3 to DP and to attenuate Notch1 activation in DP cells. Given the importance of inappropriate NOTCH1 signalling in T-cell acute lymphoblastic leukaemia (T-ALL), and the involvement of BCL6 in other types of leukaemia, this study is important to our understanding of T-ALL.
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Affiliation(s)
- Anisha Solanki
- UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Diana C Yánez
- UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Ching-In Lau
- UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Jasmine Rowell
- UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Alessandro Barbarulo
- UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Susan Ross
- UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Hemant Sahni
- UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Tessa Crompton
- UCL Great Ormond Street Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
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Yánez DC, Sahni H, Ross S, Solanki A, Lau C, Papaioannou E, Barbarulo A, Powell R, Lange UC, Adams DJ, Barenco M, Ono M, D'Acquisto F, Furmanski AL, Crompton T. IFITM proteins drive type 2 T helper cell differentiation and exacerbate allergic airway inflammation. Eur J Immunol 2018; 49:66-78. [PMID: 30365177 PMCID: PMC6396086 DOI: 10.1002/eji.201847692] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 09/13/2018] [Accepted: 10/24/2018] [Indexed: 12/24/2022]
Abstract
The interferon‐inducible transmembrane (Ifitm/Fragilis) genes encode homologous proteins that are induced by IFNs. Here, we show that IFITM proteins regulate murine CD4+ Th cell differentiation. Ifitm2 and Ifitm3 are expressed in wild‐type (WT) CD4+ T cells. On activation, Ifitm3 was downregulated and Ifitm2 was upregulated. Resting Ifitm‐family‐deficient CD4+ T cells had higher expression of Th1‐associated genes than WT and purified naive Ifitm‐family‐deficient CD4+ T cells differentiated more efficiently to Th1, whereas Th2 differentiation was inhibited. Ifitm‐family‐deficient mice, but not Ifitm3‐deficient mice, were less susceptible than WT to induction of allergic airways disease, with a weaker Th2 response and less severe disease and lower Il4 but higher Ifng expression and IL‐27 secretion. Thus, the Ifitm family is important in adaptive immunity, influencing Th1/Th2 polarization, and Th2 immunopathology.
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Affiliation(s)
- Diana C. Yánez
- UCL Great Ormond Street Institute of Child HealthLondonUK
- School of MedicineUniversidad San Francisco de QuitoQuitoEcuador
| | - Hemant Sahni
- UCL Great Ormond Street Institute of Child HealthLondonUK
| | - Susan Ross
- UCL Great Ormond Street Institute of Child HealthLondonUK
| | - Anisha Solanki
- UCL Great Ormond Street Institute of Child HealthLondonUK
| | - Ching‐In Lau
- UCL Great Ormond Street Institute of Child HealthLondonUK
| | | | | | - Rebecca Powell
- UCL Great Ormond Street Institute of Child HealthLondonUK
| | - Ulrike C. Lange
- Department of AnesthesiologyUniversity Medical Center Hamburg‐EppendorfHamburgGermany
- The Wellcome Trust/Cancer Research UK Gurdon InstituteCambridgeUK
| | - David J. Adams
- Wellcome Trust Sanger InstituteWellcome Trust Genome CampusCambridgeUK
| | | | - Masahiro Ono
- UCL Great Ormond Street Institute of Child HealthLondonUK
- Department of Life Sciences, Sir Alexander Fleming BuildingImperial College LondonLondonUK
| | | | - Anna L. Furmanski
- UCL Great Ormond Street Institute of Child HealthLondonUK
- School of Life SciencesUniversity of BedfordshireLutonUK
| | - Tessa Crompton
- UCL Great Ormond Street Institute of Child HealthLondonUK
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Sahni H, Ross S, Barbarulo A, Solanki A, Lau CI, Furmanski A, Saldaña JI, Ono M, Hubank M, Barenco M, Crompton T. A genome wide transcriptional model of the complex response to pre-TCR signalling during thymocyte differentiation. Oncotarget 2016; 6:28646-60. [PMID: 26415229 PMCID: PMC4745683 DOI: 10.18632/oncotarget.5796] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 07/07/2015] [Accepted: 09/08/2015] [Indexed: 01/19/2023] Open
Abstract
Developing thymocytes require pre-TCR signalling to differentiate from CD4-CD8- double negative to CD4+CD8+ double positive cell. Here we followed the transcriptional response to pre-TCR signalling in a synchronised population of differentiating double negative thymocytes. This time series analysis revealed a complex transcriptional response, in which thousands of genes were up and down-regulated before changes in cell surface phenotype were detected. Genome-wide measurement of RNA degradation of individual genes showed great heterogeneity in the rate of degradation between different genes. We therefore used time course expression and degradation data and a genome wide transcriptional modelling (GWTM) strategy to model the transcriptional response of genes up-regulated on pre-TCR signal transduction. This analysis revealed five major temporally distinct transcriptional activities that up regulate transcription through time, whereas down-regulation of expression occurred in three waves. Our model thus placed known regulators in a temporal perspective, and in addition identified novel candidate regulators of thymocyte differentiation.
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Affiliation(s)
- Hemant Sahni
- Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Susan Ross
- Institute of Child Health, University College London, London WC1N 1EH, UK
| | | | - Anisha Solanki
- Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Ching-In Lau
- Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Anna Furmanski
- Institute of Child Health, University College London, London WC1N 1EH, UK
| | | | - Masahiro Ono
- Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Mike Hubank
- Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Martino Barenco
- Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Tessa Crompton
- Institute of Child Health, University College London, London WC1N 1EH, UK
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4
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Saldaña JI, Solanki A, Lau CI, Sahni H, Ross S, Furmanski AL, Ono M, Holländer G, Crompton T. Sonic Hedgehog regulates thymic epithelial cell differentiation. J Autoimmun 2016; 68:86-97. [PMID: 26778835 PMCID: PMC4803023 DOI: 10.1016/j.jaut.2015.12.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 12/11/2015] [Accepted: 12/16/2015] [Indexed: 12/12/2022]
Abstract
Sonic Hedgehog (Shh) is expressed in the thymus, where it regulates T cell development. Here we investigated the influence of Shh on thymic epithelial cell (TEC) development. Components of the Hedgehog (Hh) signalling pathway were expressed by TEC, and use of a Gli Binding Site-green fluorescence protein (GFP) transgenic reporter mouse demonstrated active Hh-dependent transcription in TEC in the foetal and adult thymus. Analysis of Shh-deficient foetal thymus organ cultures (FTOC) showed that Shh is required for normal TEC differentiation. Shh-deficient foetal thymus contained fewer TEC than wild type (WT), the proportion of medullary TEC was reduced relative to cortical TEC, and cell surface expression of MHC Class II molecules was increased on both cortical and medullary TEC populations. In contrast, the Gli3-deficient thymus, which shows increased Hh-dependent transcription in thymic stroma, had increased numbers of TEC, but decreased cell surface expression of MHC Class II molecules on both cortical and medullary TEC. Neutralisation of endogenous Hh proteins in WT FTOC led to a reduction in TEC numbers, and in the proportion of mature Aire-expressing medullary TEC, but an increase in cell surface expression of MHC Class II molecules on medullary TEC. Likewise, conditional deletion of Shh from TEC in the adult thymus resulted in alterations in TEC differentiation and consequent changes in T cell development. TEC numbers, and the proportion of mature Aire-expressing medullary TEC were reduced, and cell surface expression of MHC Class II molecules on medullary TEC was increased. Differentiation of mature CD4 and CD8 single positive thymocytes was increased, demonstrating the regulatory role of Shh production by TEC on T cell development. Treatment of human thymus explants with recombinant Shh or neutralising anti-Shh antibody indicated that the Hedgehog pathway is also involved in regulation of differentiation from DP to mature SP T cells in the human thymus. TEC express components of the Hedgehog signalling pathway and transduce it's signals. Sonic hedgehog (Shh) is required for normal TEC development. Sonic hedgehog particularly influences differentiation to the medullary TEC lineage. Shh regulates cell surface MHCII expression on both cortical and medullary TEC.
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Affiliation(s)
- José Ignacio Saldaña
- Immunobiology Section, UCL Institute of Child Health, 30 Guilford Street London WC1N 1EH, UK
| | - Anisha Solanki
- Immunobiology Section, UCL Institute of Child Health, 30 Guilford Street London WC1N 1EH, UK
| | - Ching-In Lau
- Immunobiology Section, UCL Institute of Child Health, 30 Guilford Street London WC1N 1EH, UK
| | - Hemant Sahni
- Immunobiology Section, UCL Institute of Child Health, 30 Guilford Street London WC1N 1EH, UK
| | - Susan Ross
- Immunobiology Section, UCL Institute of Child Health, 30 Guilford Street London WC1N 1EH, UK
| | - Anna L Furmanski
- Immunobiology Section, UCL Institute of Child Health, 30 Guilford Street London WC1N 1EH, UK
| | - Masahiro Ono
- Immunobiology Section, UCL Institute of Child Health, 30 Guilford Street London WC1N 1EH, UK
| | - Georg Holländer
- Weatherall Institute of Molecular Medicine, and Department of Paediatrics, University of Oxford, UK
| | - Tessa Crompton
- Immunobiology Section, UCL Institute of Child Health, 30 Guilford Street London WC1N 1EH, UK.
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Furmanski AL, Barbarulo A, Solanki A, Lau CI, Sahni H, Saldana JI, D'Acquisto F, Crompton T. The transcriptional activator Gli2 modulates T-cell receptor signalling through attenuation of AP-1 and NFκB activity. J Cell Sci 2015; 128:2085-95. [PMID: 25908851 PMCID: PMC4450292 DOI: 10.1242/jcs.165803] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [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: 11/07/2014] [Accepted: 03/30/2015] [Indexed: 01/20/2023] Open
Abstract
Different tissues contain diverse and dynamic cellular niches, providing distinct signals to tissue-resident or migratory infiltrating immune cells. Hedgehog (Hh) proteins are secreted inter-cellular signalling molecules, which are essential during development and are important in cancer, post-natal tissue homeostasis and repair. Hh signalling mediated by the Hh-responsive transcription factor Gli2 also has multiple roles in T-lymphocyte development and differentiation. Here, we investigate the function of Gli2 in T-cell signalling and activation. Gene transcription driven by the Gli2 transcriptional activator isoform (Gli2A) attenuated T-cell activation and proliferation following T-cell receptor (TCR) stimulation. Expression of Gli2A in T-cells altered gene expression profiles, impaired the TCR-induced Ca2+ flux and nuclear expression of NFAT2, suppressed upregulation of molecules essential for activation, and attenuated signalling pathways upstream of the AP-1 and NFκB complexes, leading to reduced activation of these important transcription factors. Inhibition of physiological Hh-dependent transcription increased NFκB activity upon TCR ligation. These data are important for understanding the molecular mechanisms of immunomodulation, particularly in tissues where Hh proteins or other Gli-activating ligands such as TGFβ are upregulated, including during inflammation, tissue damage and repair, and in tumour microenvironments.
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Affiliation(s)
- Anna L Furmanski
- Immunobiology Section, Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Alessandro Barbarulo
- Immunobiology Section, Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Anisha Solanki
- Immunobiology Section, Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Ching-In Lau
- Immunobiology Section, Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Hemant Sahni
- Immunobiology Section, Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Jose Ignacio Saldana
- Immunobiology Section, Institute of Child Health, University College London, London WC1N 1EH, UK
| | - Fulvio D'Acquisto
- Centre for Biochemical Pharmacology, William Harvey Research Institute, QMUL, London EC1M 6BQ, UK
| | - Tessa Crompton
- Immunobiology Section, Institute of Child Health, University College London, London WC1N 1EH, UK
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Hager-Theodorides AL, Ross SE, Sahni H, Mishina Y, Furmanski AL, Crompton T. Direct BMP2/4 signaling through BMP receptor IA regulates fetal thymocyte progenitor homeostasis and differentiation to CD4+CD8+ double-positive cell. Cell Cycle 2013; 13:324-33. [PMID: 24240189 PMCID: PMC3906248 DOI: 10.4161/cc.27118] [Citation(s) in RCA: 23] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
BMP2/4 signaling is required for embryogenesis and involved in thymus morphogenesis and T-lineage differentiation. In vitro experiments have shown that treatment of thymus explants with exogenous BMP4 negatively regulated differentiation of early thymocyte progenitors and the transition from CD4−CD8− (DN) to CD4+CD8+ (DP). Here we show that in vivo BMP2/4 signaling is required for fetal thymocyte progenitor homeostasis and expansion, but negatively regulates differentiation from DN to DP cell. Unexpectedly, conditional deletion of BMPRIA from fetal thymocytes (using the Cre-loxP system and directing excision to hematopoietic lineage cells with the Vav promoter) demonstrated that physiological levels of BMP2/4 signaling directly to thymocytes through BMPRIA are required for normal differentiation and expansion of early fetal DN thymocytes. In contrast, the arrest in early thymocyte progenitor differentiation caused by exogenous BMP4 treatment of thymus explants is induced in part by direct signaling to thymocytes through BMPRIA, and in part by indirect signaling through non-hematopoietic cells. Analysis of the transition from fetal DN to DP cell, both by ex vivo analysis of conditional BMPRIA-deficient thymocytes and by treatment of thymus explants with the BMP4-inhibitor Noggin demonstrated that BMP2/4 signaling is a negative regulator at this stage. We showed that at this stage of fetal T-cell development BMP2/4 signals directly to thymocytes through BMPRIA.
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Affiliation(s)
- Ariadne L Hager-Theodorides
- Department of Animal Science and Aquaculture; Laboratory of Animal Breeding and Husbandry; Agricultural University of Athens; Athens, Greece
| | - Susan E Ross
- Immunobiology Unit; UCL Institute of Child Health; London, UK
| | - Hemant Sahni
- Immunobiology Unit; UCL Institute of Child Health; London, UK
| | - Yuji Mishina
- University of Michigan; School of Dentistry; Department of Biologic and Materials Sciences; Ann Arbor, MI USA
| | | | - Tessa Crompton
- Immunobiology Unit; UCL Institute of Child Health; London, UK
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Abstract
Paget's disease of bone is a chronic bone remodeling disorder. Although most patients are asymptomatic, a variety of symptoms and complications may develop directly from bone involvement or secondarily due to compression by the expanded bone. It is usually diagnosed from radiological and biochemical abnormalities or in advanced cases it becomes clinically evident due to the expanded bone. We report a case of Paget's disease which was detected incidentally during evaluation of nephrolithiasis and polyarthritis but had normal radiographs and normal biochemical markers.
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Affiliation(s)
- Avs Anil Kumar
- Department of Nuclear Medicine, Command Hospital, Air Force, Bengaluru, India ; Department of Nuclear Medicine, Command Hospital, Kolkata, India
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8
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Furmanski AL, Saldana JI, Ono M, Sahni H, Paschalidis N, D'Acquisto F, Crompton T. Tissue-derived hedgehog proteins modulate Th differentiation and disease. J Immunol 2013; 190:2641-9. [PMID: 23408837 DOI: 10.4049/jimmunol.1202541] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Genome-wide association studies of complex immune-mediated diseases have indicated that many genetic factors, each with individual low risk, contribute to overall disease. It is therefore timely and important to characterize how immune responses may be subtly modified by tissue context. In this article, we explore the role of tissue-derived molecules in influencing the function of T cells, which, owing to their migratory nature, come into contact with many different microenvironments through their lifespan. Hedgehog (Hh) proteins act as secreted morphogens, providing concentration-dependent positional and temporal cell-fate specification in solid tissues. Hh signaling is required for embryogenesis and is important in postnatal tissue renewal and in malignancy. However, the function of Hh in dynamic, fluid systems, such as in mammalian immunity, is largely unknown. In this article, we show that Hh-dependent transcription in T cells promoted Th2 transcriptional programs and differentiation, exacerbating allergic disease. Of interest, expression of Sonic Hh increased in lung epithelial cells following the induction of allergic disease, and lung T cells upregulated Hh target gene expression, indicating that T cells respond to locally secreted Hh ligands in vivo. We show that Il4, the key Th2 cytokine, is a novel transcriptional target of Hh signals in T cells, providing one mechanism for the role of Hh in Th differentiation. We propose that Hh, secreted from inflamed, remodeling, or malignant tissue, can modulate local T cell function. Our data present an unexpected and novel role for tissue-derived morphogens in the regulation of fluid immune responses, with implications for allergy and tumor responses, suggesting new uses for anti-Hh therapeutics.
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Affiliation(s)
- Anna L Furmanski
- Immunobiology Unit, Institute of Child Health, University College London, London WC1N 1EH, United Kingdom
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Sharma RM, Mohan C, Setlur R, Sahni H. Ultrasound Guided Central Venous Cannulation. Med J Armed Forces India 2011; 62:371-2. [PMID: 27688545 DOI: 10.1016/s0377-1237(06)80112-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2006] [Accepted: 09/02/2006] [Indexed: 11/16/2022] Open
Affiliation(s)
- R M Sharma
- Reader (Department of Anaesthesiology and Critical Care), AFMC, Pune-411040
| | - Cvr Mohan
- Professor and Head (Department of Anaesthesiology and Critical Care), AFMC, Pune-411040
| | - R Setlur
- Reader (Department of Anaesthesiology and Critical Care), AFMC, Pune-411040
| | - H Sahni
- Reader (Department of Radiodiagnosis and Imaging), AFMC, Pune-40
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Grover S, Grewal RS, Verma R, Sahni H, Muralidhar R, Sinha P. Osler-Weber-Rendu syndrome: a case report with familial clustering. Indian J Dermatol Venereol Leprol 2009; 75:100-1. [PMID: 19180693 DOI: 10.4103/0378-6323.45242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Osler-Weber-Rendu syndrome, also known as hereditary hemorrhagic telangiectasia, is a rare autosomal dominant disorder manifested by telangiectases of the skin and mucous membranes and arteriovenous malformations of various organ systems. We present a case of Osler-Weber-Rendu syndrome with 11 affected members in her family.
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Affiliation(s)
- Sanjiv Grover
- Department of Dermatology, Armed Forces Medical College and Command Hospital, Pune-411 040, India.
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11
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Lalla RK, Joshi MC, Sridhar MS, Sahni H. Epidural Abscess and Discitis Following Spinal Anaesthesia- A Case Report. Med J Armed Forces India 2005; 61:186-7. [PMID: 27407747 DOI: 10.1016/s0377-1237(05)80023-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2003] [Accepted: 04/05/2004] [Indexed: 11/28/2022] Open
Affiliation(s)
- R K Lalla
- Classified Specialist (Anaesthesiology and Neuroanaesthesiology), Command Hospital Air Force, Bangalore-7
| | - M C Joshi
- Classified Specialist (Anaesthesiology), 7 Air Force Hospital, Kanpur
| | - M S Sridhar
- Classified Specialist (Surgery and Neurosurgery), Command Hospital (Central Command), Lucknow
| | - H Sahni
- Reader, Department of Radiodiagnosis and Imaging, Armed Forces Medical College, Pune-40
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12
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Xu F, Sahni H, Settnek S, Gupta A, Phillips J, Zhang D, Beasley J, De Coronado S, Wagner U, Rosso K, Malone K, Singer D, Marks C, Tarnowski B, Buetow K. Mouse models of human cancer web-based resources. AMIA Annu Symp Proc 2003; 2003:1056. [PMID: 14728559 PMCID: PMC1480011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
The Mouse Models of Human Cancers Consortium (MMHCC) is a collaborative program designed to derive and characterize mouse models of human malignancies. To enhance information and resource exchange among the MMHCC investigators and other cancer research scientists, the NCI Center for Bioinformatics (NCICB, http://ncicb.nci.nih.gov/) has developed web-based resources that are freely available to the cancer research community. These resources include a website (http://emice.nci.nih.gov) and databases for cancer models (http://cancermodels.nci.nih.gov) and cancer images (http://cancerimages.nci.nih.gov).
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Affiliation(s)
- F Xu
- Center for Bioinformatics, National Cancer Institute, Rockville, Maryland, USA
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13
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Suri A, Singh KJ, Nagpalvsm BM, Satija L, Debnath J, Sahni H. FOREIGN BODY NEEDLES IN LIVER AND ABDOMINAL WALL. Med J Armed Forces India 2000; 56:250-251. [PMID: 28790724 PMCID: PMC5532097 DOI: 10.1016/s0377-1237(17)30183-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Affiliation(s)
- Amit Suri
- Graded Specialist in Radiodiagnosis, Command Hospital, Southern Command, Pune
| | - K J Singh
- Clinical Tutor in Surgery, AFMC, Pune 411 040
| | | | - L Satija
- Classified Specialist in Radiodiagnosis, Command Hospital, Southern Command, Pune
| | - J Debnath
- Graded Specialist in Radiodiagnosis, Command Hospital, Southern Command, Pune
| | - H Sahni
- Graded Specialist in Radiodiagnosis, Command Hospital, Southern Command, Pune
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14
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Kalanadhabhatta V, Muppidi D, Sahni H, Robles A, Kramer M. Successful oral desensitization to trimethoprim-sulfamethoxazole in acquired immune deficiency syndrome. Ann Allergy Asthma Immunol 1996; 77:394-400. [PMID: 8933778 DOI: 10.1016/s1081-1206(10)63338-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To study the outcome of a modified oral desensitization protocol for trimethoprim-sulfamethoxazole in human immunodeficiency virus infected patients with Pneumocystis carinii pneumonia and acquired immune deficiency syndrome. DESIGN A prospective study. SETTING Tertiary care referral center. PATIENTS Thirteen human immunodeficiency virus infected patients with Pneumocystis carinii pneumonia and allergy to sulfonamides who failed alternative therapy. INTERVENTION Oral desensitization to trimethoprim-sulfamethoxazole. MEASUREMENTS Nature of allergic reactions, toxicity of alternate medications, indication as well as outcome of trimethoprim-sulfamethoxazole desensitization and routine laboratory determinations. RESULTS The most common reaction to trimethoprim-sulfamethoxazole was generalized, pruritic maculopapular rash (n = 10, 76.9%) followed by urticaria/angioedema in two patients (15.38%). Two patients had generalized pruritus without rash. All patients (n = 13) tolerated oral desensitization to trimethoprim-sulfamethoxazole without any adverse reactions including three patients who were critically ill and on mechanical ventilation. Thus the success rate of our protocol was 100%. No patient had received antihistamines prior to or during the protocol. Four patients (5, 6, 7, and 9) were receiving prednisone for severe Pneumocystis carinii pneumonia. Total followup has ranged from 4 to 84 weeks. Two patients died during followup due to causes unrelated to desensitization. All other patients are tolerating trimethoprim-sulfamethoxazole without any allergic reactions. CONCLUSIONS Oral desensitization to trimethoprim-sulfamethoxazole, as per this protocol is safe, in that there were no systemic or cutaneous reactions during desensitization as well as followup. It is well tolerated in all patients, including the three critically ill patients. As judged by the outcome and ability to tolerate trimethoprim-sulfamethoxazole after desensitization, the procedure is successful in all patients in this study. Equipped with this protocol one can evaluate possible mechanisms of desensitization such as oral tolerance or mediator depletion in a controlled fashion.
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Affiliation(s)
- V Kalanadhabhatta
- Division of Allergy/Clinical Immunology, Department of Medicine, Medicine State University of New York, Health Science Center at Brooklyn, USA
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