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Sur S, Xu Y, Li S, Gong SS, Nevidomskyy AH. Field-Induced Non-BEC Transitions in Frustrated Magnets. Phys Rev Lett 2024; 132:066701. [PMID: 38394558 DOI: 10.1103/physrevlett.132.066701] [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] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 12/12/2023] [Accepted: 01/04/2024] [Indexed: 02/25/2024]
Abstract
Frustrated spin systems have traditionally proven challenging to understand, owing to a scarcity of controlled methods for their analyses. By contrast, under strong magnetic fields, certain aspects of spin systems admit simpler and universal description in terms of hardcore bosons. The bosonic formalism is anchored by the phenomenon of Bose-Einstein condensation (BEC), which has helped explain the behaviors of a wide range of magnetic compounds under applied magnetic fields. Here, we focus on the interplay between frustration and externally applied magnetic field to identify instances where the BEC paradigm is no longer applicable. As a representative example, we consider the antiferromagnetic J_{1}-J_{2}-J_{3} model on the square lattice in the presence of a uniform external magnetic field, and demonstrate that the frustration-driven suppression of the Néel order leads to a Lifshitz transition for the hardcore bosons. In the vicinity of the Lifshitz point, the physics becomes unmoored from the BEC paradigm, and the behavior of the system, both at and below the saturation field, is controlled by a Lifshitz multicritical point. We obtain the resultant universal scaling behaviors, and provide strong evidence for the existence of a frustration and magnetic-field driven correlated bosonic liquid state along the entire phase boundary separating the Néel phase from other magnetically ordered states.
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Affiliation(s)
- Shouvik Sur
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - Yi Xu
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - Shuyi Li
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - Shou-Shu Gong
- School of Physical Sciences, Great Bay University, Dongguan 523000, China, and Great Bay Institute for Advanced Study, Dongguan 523000, China
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Chen L, Lowder DT, Bakali E, Andrews AM, Schrenk W, Waas M, Svagera R, Eguchi G, Prochaska L, Wang Y, Setty C, Sur S, Si Q, Paschen S, Natelson D. Shot noise in a strange metal. Science 2023; 382:907-911. [PMID: 37995251 DOI: 10.1126/science.abq6100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 10/12/2023] [Indexed: 11/25/2023]
Abstract
Strange-metal behavior has been observed in materials ranging from high-temperature superconductors to heavy fermion metals. In conventional metals, current is carried by quasiparticles; although it has been suggested that quasiparticles are absent in strange metals, direct experimental evidence is lacking. We measured shot noise to probe the granularity of the current-carrying excitations in nanowires of the heavy fermion strange metal YbRh2Si2. When compared with conventional metals, shot noise in these nanowires is strongly suppressed. This suppression cannot be attributed to either electron-phonon or electron-electron interactions in a Fermi liquid, which suggests that the current is not carried by well-defined quasiparticles in the strange-metal regime that we probed. Our work sets the stage for similar studies of other strange metals.
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Affiliation(s)
- Liyang Chen
- Applied Physics Graduate Program, Rice University, TX 77005, USA
| | - Dale T Lowder
- Department of Physics and Astronomy, Rice Center for Quantum Materials, Rice University, Houston, TX 77005, USA
| | - Emine Bakali
- Institute of Solid State Physics, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Aaron Maxwell Andrews
- Institute of Solid State Electronics, TU Wien, Gußhausstraße 25-25a, Gebäude CH, 1040 Vienna, Austria
| | - Werner Schrenk
- Center for Micro and Nanostructures, TU Wien, Gußhausstraße 25-25a, Gebäude CH, 1040 Vienna, Austria
| | - Monika Waas
- Institute of Solid State Physics, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Robert Svagera
- Institute of Solid State Physics, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Gaku Eguchi
- Institute of Solid State Physics, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Lukas Prochaska
- Institute of Solid State Physics, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Yiming Wang
- Department of Physics and Astronomy, Rice Center for Quantum Materials, Rice University, Houston, TX 77005, USA
| | - Chandan Setty
- Department of Physics and Astronomy, Rice Center for Quantum Materials, Rice University, Houston, TX 77005, USA
| | - Shouvik Sur
- Department of Physics and Astronomy, Rice Center for Quantum Materials, Rice University, Houston, TX 77005, USA
| | - Qimiao Si
- Department of Physics and Astronomy, Rice Center for Quantum Materials, Rice University, Houston, TX 77005, USA
| | - Silke Paschen
- Institute of Solid State Physics, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
| | - Douglas Natelson
- Department of Physics and Astronomy, Rice Center for Quantum Materials, Rice University, Houston, TX 77005, USA
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX 77005, USA
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Kyriacou C, Cooper N, Robinson E, Parker N, Barcroft J, Kundu S, Letchworth P, Sur S, Gould D, Stalder C, Bourne T. Ultrasound characteristics, serum biochemistry and outcome of ectopic pregnancies presenting during COVID-19 pandemic. Ultrasound Obstet Gynecol 2021; 58:909-915. [PMID: 34605083 PMCID: PMC8661840 DOI: 10.1002/uog.24793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 09/14/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVE To describe and compare the characteristics of ectopic pregnancies (EPs) in the year prior to vs during the coronavirus disease 2019 (COVID-19) pandemic. METHODS This was a retrospective analysis of women diagnosed with an EP on transvaginal sonography conducted at a center in London, UK, providing early-pregnancy assessment, between 1 January 2019 and 31 December 2020. Women were identified via the Astraia ultrasound reporting system using coded and non-coded outcomes of EP or pregnancy outside the uterine cavity. Data related to predefined outcomes were collected using Astraia and Cerner electronic reporting systems. Main outcome measures included clinical, ultrasound and biochemical features of EP, in addition to reported complications and management. RESULTS There were 22 683 consultations over the 2-year period. Following consultation, a similar number and proportion of EPs were diagnosed in 2019 (141/12 657 (1%)) and 2020 (134/10 026 (1%)). Both cohorts were comparable in age, ethnicity, weight and method of conception. Gestational age at the first transvaginal sonography scan and at diagnosis were similar, and no difference in location, size or morphology of EP was found between the two cohorts. Serum human chorionic gonadotropin (hCG) levels at the time of EP diagnosis were higher in 2020 than in 2019 (1005 IU/L vs 665 IU/L; P = 0.03). The proportions of women according to type of final EP management were similar, but the rate of failed first-line management was higher during vs before the pandemic (16% vs 6%; P = 0.01). The rates of blood detected in the pelvis (hemoperitoneum) on ultrasound (23% vs 26%; P = 0.58) and of ruptured EP confirmed surgically (9% vs 3%; P = 0.07) were similar in 2019 vs 2020. CONCLUSIONS No difference was observed in the location, size, morphology or gestational age at the first ultrasound examination or at diagnosis of EP between women diagnosed before vs during the COVID-19 pandemic. Complication rates and final management strategy were also unchanged. However, hCG levels and the failure rate of first-line conservative management measures were higher during the pandemic. Our findings suggest that women continued to access appropriate care for EP during the COVID-19 pandemic, with no evidence of diagnostic delay or an increase in adverse outcome in our population. © 2021 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- C. Kyriacou
- Tommy's National Centre for Miscarriage Research, Department of Obstetrics and Gynaecology, Queen Charlotte's & Chelsea HospitalImperial College LondonLondonUK
- Department of Metabolism, Digestion and ReproductionImperial College LondonLondonUK
| | - N. Cooper
- Tommy's National Centre for Miscarriage Research, Department of Obstetrics and Gynaecology, Queen Charlotte's & Chelsea HospitalImperial College LondonLondonUK
| | - E. Robinson
- Tommy's National Centre for Miscarriage Research, Department of Obstetrics and Gynaecology, Queen Charlotte's & Chelsea HospitalImperial College LondonLondonUK
| | - N. Parker
- Tommy's National Centre for Miscarriage Research, Department of Obstetrics and Gynaecology, Queen Charlotte's & Chelsea HospitalImperial College LondonLondonUK
| | - J. Barcroft
- Tommy's National Centre for Miscarriage Research, Department of Obstetrics and Gynaecology, Queen Charlotte's & Chelsea HospitalImperial College LondonLondonUK
| | - S. Kundu
- Department of Metabolism, Digestion and ReproductionImperial College LondonLondonUK
| | - P. Letchworth
- St Mary's Hospital, Department of Obstetrics and GynaecologyImperial College LondonLondonUK
| | - S. Sur
- Tommy's National Centre for Miscarriage Research, Department of Obstetrics and Gynaecology, Queen Charlotte's & Chelsea HospitalImperial College LondonLondonUK
| | - D. Gould
- St Mary's Hospital, Department of Obstetrics and GynaecologyImperial College LondonLondonUK
| | - C. Stalder
- Tommy's National Centre for Miscarriage Research, Department of Obstetrics and Gynaecology, Queen Charlotte's & Chelsea HospitalImperial College LondonLondonUK
| | - T. Bourne
- Tommy's National Centre for Miscarriage Research, Department of Obstetrics and Gynaecology, Queen Charlotte's & Chelsea HospitalImperial College LondonLondonUK
- Department of Metabolism, Digestion and ReproductionImperial College LondonLondonUK
- Department of Obstetrics and GynaecologyUniversity Hospitals LeuvenLeuvenBelgium
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Al-Memar M, Vaulet T, Fourie H, Bobdiwala S, Farren J, Saso S, Bracewell-Milnes T, Moor BD, Sur S, Stalder C, Bennett P, Timmerman D, Bourne T. First-trimester intrauterine hematoma and pregnancy complications. Ultrasound Obstet Gynecol 2020; 55:536-545. [PMID: 31483898 DOI: 10.1002/uog.20861] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 08/14/2019] [Accepted: 08/20/2019] [Indexed: 06/10/2023]
Abstract
OBJECTIVE To assess whether sonographic diagnosis of intrauterine hematoma (IUH) in the first trimester of pregnancy is associated with first-trimester miscarriage and antenatal, delivery and neonatal complications. METHODS This was a prospective observational cohort study of women with an intrauterine singleton pregnancy between 5 and 14 weeks' gestation recruited at Queen Charlotte's and Chelsea Hospital, London, UK, between March 2014 and March 2016. Participants underwent serial ultrasound examinations in the first trimester, and the presence, location, size and persistence of any IUH was evaluated. First-trimester miscarriage was defined as pregnancy loss before 14 weeks' gestation. Clinical symptoms, including pelvic pain and vaginal bleeding, were recorded at each visit using validated symptom scores. Antenatal, delivery and neonatal outcomes were obtained from hospital records. Logistic regression analysis and the chi-square test were used to assess the association between the presence and features of IUH and the incidence of adverse pregnancy outcome. Odds ratios (OR) were first adjusted for maternal age (aOR) and then further adjusted for the presence of vaginal bleeding or pelvic pain in the first trimester. RESULTS Of 1003 women recruited to the study, 946 were included in the final analysis and of these, 268 (28.3%) were diagnosed with an IUH in the first trimester. The presence of IUH was associated with the incidence of preterm birth (aOR, 1.94 (95% CI, 1.07-3.52)), but no other individual or overall antenatal, delivery or neonatal complications. No association was found between the presence of IUH in the first trimester and first-trimester miscarriage (aOR, 0.81 (95% CI, 0.44-1.50)). These findings were independent of the absolute size of the hematoma and the presence of vaginal bleeding or pelvic pain in the first trimester. When IUH was present in the first trimester, there was no association between its size, content or position in relation to the gestational sac and overall antenatal, delivery and neonatal complications. Diagnosis of a retroplacental IUH was associated with an increased risk of overall antenatal complications (P = 0.04). CONCLUSIONS Our findings demonstrate that there is no association between the presence of IUH in the first trimester and first-trimester miscarriage. However, an association with preterm birth, independently of the presence of symptoms of pelvic pain and/or vaginal bleeding, is evident. Women diagnosed with IUH in the first trimester should be counseled about their increased risk of preterm birth and possibly be offered increased surveillance during the course of their pregnancy. Copyright © 2019 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- M Al-Memar
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
- Division of Surgery and Cancer, Institute of Developmental Reproductive and Developmental Biology, Imperial College London, London, UK
| | - T Vaulet
- ESAT-STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics, Leuven, Belgium
- imec, Leuven, Belgium
| | - H Fourie
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
- Division of Surgery and Cancer, Institute of Developmental Reproductive and Developmental Biology, Imperial College London, London, UK
| | - S Bobdiwala
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
- Division of Surgery and Cancer, Institute of Developmental Reproductive and Developmental Biology, Imperial College London, London, UK
| | - J Farren
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
- Division of Surgery and Cancer, Institute of Developmental Reproductive and Developmental Biology, Imperial College London, London, UK
| | - S Saso
- Division of Surgery and Cancer, Institute of Developmental Reproductive and Developmental Biology, Imperial College London, London, UK
| | - T Bracewell-Milnes
- Division of Surgery and Cancer, Institute of Developmental Reproductive and Developmental Biology, Imperial College London, London, UK
| | - B De Moor
- ESAT-STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics, Leuven, Belgium
- imec, Leuven, Belgium
| | - S Sur
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
| | - C Stalder
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
| | - P Bennett
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
- Division of Surgery and Cancer, Institute of Developmental Reproductive and Developmental Biology, Imperial College London, London, UK
| | - D Timmerman
- KU Leuven, Department of Development and Regeneration, Leuven, Belgium
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
| | - T Bourne
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College London, London, UK
- Division of Surgery and Cancer, Institute of Developmental Reproductive and Developmental Biology, Imperial College London, London, UK
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
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Sur S, Roy B. Unifying Interacting Nodal Semimetals: A New Route to Strong Coupling. Phys Rev Lett 2019; 123:207601. [PMID: 31809112 DOI: 10.1103/physrevlett.123.207601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 05/02/2019] [Indexed: 06/10/2023]
Abstract
We propose a general framework for constructing a large set of nodal-point semimetals by tuning the number of linearly (d_{L}) and (at most) quadratically (d_{Q}) dispersing directions. By virtue of such a unifying scheme, we identify a new perturbative route to access various strongly interacting non-Dirac semimetals with d_{Q}>0. As a demonstrative example, we relate a two-dimensional anisotropic semimetal with d_{L}=d_{Q}=1, describing the topological transition between a Dirac semimetal and a normal insulator, and its three-dimensional counterparts with d_{L}=1, d_{Q}=2. We address the quantum critical phenomena and emergence of non-Fermi liquid states with unusual dynamical structures within the framework of an ε expansion, where ε=2-d_{Q}, when these systems reside at the brink of charge- or spin-density-wave orderings, or an s-wave pairing. Our results can be germane to two-dimensional uniaxially strained optical honeymcomb lattice, α-(BEDT-TTF)_{2}I_{3}.
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Affiliation(s)
- Shouvik Sur
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
- National High Magnetic Field Laboratory and Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - Bitan Roy
- Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Straße 38, 01187 Dresden, Germany
- Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015, USA
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Sur S, Noack C, Christalla P, Tiburcy M, Nagata K, Mayr M, Zimmermann WH. 5044Heat shock protein 47 knockout in fibroblasts causes contractile dysfunction in engineered human myocardium. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.5044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Soong P, Sur S, Fujita B, Grishina E, Kuzyakova M, Tiburcy M, Zimmermann W. P2545Inducible paracrine release of IGF-1 improves heart muscle thickness and function. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Van Calster B, Bobdiwala S, Guha S, Van Hoorde K, Al-Memar M, Harvey R, Farren J, Kirk E, Condous G, Sur S, Stalder C, Timmerman D, Bourne T. Managing pregnancy of unknown location based on initial serum progesterone and serial serum hCG levels: development and validation of a two-step triage protocol. Ultrasound Obstet Gynecol 2016; 48:642-649. [PMID: 26776599 DOI: 10.1002/uog.15864] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 01/08/2016] [Accepted: 01/11/2016] [Indexed: 06/05/2023]
Abstract
OBJECTIVES A uniform rationalized management protocol for pregnancies of unknown location (PUL) is lacking. We developed a two-step triage protocol to select PUL at high risk of ectopic pregnancy (EP), based on serum progesterone level at presentation (step 1) and the serum human chorionic gonadotropin (hCG) ratio, defined as the ratio of hCG at 48 h to hCG at presentation (step 2). METHODS This was a cohort study of 2753 PUL (301 EP), involving a secondary analysis of prospectively and consecutively collected PUL data from two London-based university teaching hospitals. Using a chronological split we used 1449 PUL for development and 1304 for validation. We aimed to assign PUL as low risk with high confidence (high negative predictive value (NPV)) while classifying most EP as high risk (high sensitivity). The first triage step assigned PUL as low risk using a threshold of serum progesterone at presentation. The remaining PUL were triaged using a novel logistic regression risk model based on hCG ratio and initial serum progesterone (second step), defining low risk as an estimated EP risk of < 5%. RESULTS On validation, initial serum progesterone ≤ 2 nmol/L (step 1) classified 16.1% PUL as low risk. Second-step classification with the risk model selected an additional 46.0% of all PUL as low risk. Overall, the two-step protocol classified 62.1% of PUL as low risk, with an NPV of 98.6% and a sensitivity of 92.0%. When the risk model was used in isolation (i.e. without the first step), 60.5% of PUL were classified as low risk with 99.1% NPV and 94.9% sensitivity. CONCLUSION PUL can be classified efficiently into being either high or low risk for complications using a two-step protocol involving initial progesterone and hCG levels and the hCG ratio. Copyright © 2016 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- B Van Calster
- KU Leuven, Department of Development and Regeneration, Leuven, Belgium
| | - S Bobdiwala
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - S Guha
- West Middlesex Hospital, Isleworth, Middlesex, UK
| | | | - M Al-Memar
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - R Harvey
- Charing Cross Oncology Laboratory and Trophoblastic Disease Center, Charing Cross Hospital, London, UK
| | - J Farren
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - E Kirk
- North Middlesex Hospital, London, UK
| | - G Condous
- Acute Gynaecology, Early Pregnancy and Advanced Endosurgery Unit, Nepean Medical School, Nepean Hospital, University of Sydney, Kingswood, NSW, Australia
| | - S Sur
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - C Stalder
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
| | - D Timmerman
- KU Leuven, Department of Development and Regeneration, Leuven, Belgium
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
| | - T Bourne
- KU Leuven, Department of Development and Regeneration, Leuven, Belgium
- Tommy's National Centre for Miscarriage Research, Queen Charlotte's & Chelsea Hospital, Imperial College, London, UK
- Department of Obstetrics and Gynecology, University Hospitals Leuven, Leuven, Belgium
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Zahiruddin A, Melethil S, McCracken J, Sur S. P032 What a contrast! a rare case of perflutren lipid microsphere-induced true anaphylaxis. Ann Allergy Asthma Immunol 2016. [DOI: 10.1016/j.anai.2016.09.040] [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: 10/20/2022]
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Patel T, Sur S, McCracken J. P095 Transarterial chemoembolization (TACE) procedure-induced development of acquired angioedema. Ann Allergy Asthma Immunol 2016. [DOI: 10.1016/j.anai.2016.09.104] [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: 11/16/2022]
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Dossumbekova A, Patel T, Gupta M, Goldblum R, Sur S, Grant J. P200 A case report of disseminated nocardia infection in an adult with moderate lymphopenia. Ann Allergy Asthma Immunol 2016. [DOI: 10.1016/j.anai.2016.09.211] [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: 10/20/2022]
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Sur S, Snelling B, Peterson E. E-031 Superselective Intra-arterial Chemotherapy Infusion in an 8 Week-old Infant. J Neurointerv Surg 2016. [DOI: 10.1136/neurintsurg-2016-012589.103] [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: 11/03/2022]
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Abdallah Y, Naji O, Saso S, Pexsters A, Stalder C, Sur S, Raine-Fenning N, Timmerman D, Brosens JJ, Bourne T. Ultrasound assessment of the peri-implantation uterus: a review. Ultrasound Obstet Gynecol 2012; 39:612-619. [PMID: 21910147 DOI: 10.1002/uog.10098] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Emerging evidence suggests that early embryo implantation is a more active maternal process than hitherto appreciated, involving active encapsulation of the implanting blastocyst by maternal decidual cells and coordinated changes in the underlying inner myometrium, known as the junctional zone. These concepts raise the possibility that early ultrasound markers predictive of adverse pregnancy outcome could be identified. In this review we assess the role of ultrasound in predicting the likelihood of different pregnancy outcomes and highlight potential novel markers that could be tested.
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Affiliation(s)
- Y Abdallah
- Institute of Development and Reproductive Biology (IRDB), Imperial College London, London, UK.
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Qi H, Redding D, Kurosky A, Singh B, Lane J, Bain M, Boldogh I, Hazra T, Sur S. Challenge With Ragweed Pollen Extract (RWPE) In Allergic Rhinitis Induces Rapid Increase In 8-hydroxydeoxyguanosine (8-OHdG), IL-10 and G-CSF. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.856] [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: 11/24/2022]
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Sur S, Ying S, Corrigan C, Kurosky A, Boldogh I, Qi H. IL-8 And Neutrophils In Bronchoalveolar Lavage Fluids Distinguish Mild Asthma From Moderate To Severe Asthma. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.858] [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: 10/14/2022]
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Jayaprakasan K, Chan YY, Sur S, Deb S, Clewes JS, Raine-Fenning NJ. Prevalence of uterine anomalies and their impact on early pregnancy in women conceiving after assisted reproduction treatment. Ultrasound Obstet Gynecol 2011; 37:727-732. [PMID: 21337662 DOI: 10.1002/uog.8968] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/12/2011] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To estimate the prevalence of congenital uterine anomalies in subfertile women and to evaluate their influence on early pregnancy following assisted reproduction treatment (ART). METHODS We prospectively recruited 1402 subjects undergoing ART over a period of 5 years from 2005 to 2009. Three-dimensional transvaginal sonography was performed in the early follicular phase of the menstrual cycle (days 2-5) and repeated in the late follicular phase (days 10-14) if the shape of the uterine cavity could not be assessed at the first scan. All subjects who conceived following ART were followed up to 12 weeks' gestation. Chi-square test was used to compare the pregnancy rates and miscarriage rates between women shown to have uterine anomalies and those with a normal uterus. RESULTS One thousand three hundred and eighty-five subjects were included for final analysis after excluding 17 subjects in whom a definitive diagnosis could not be made. While 1201 (86.7%) subjects had a normal uterine cavity, uterine anomalies were demonstrated in 184 (13.3%) subjects. Arcuate uteri represented the commonest anomaly (n = 164 (11.8%)) followed by septate (n = 7 (0.5%)), unicornuate (n = 6 (0.4%)), subseptate (n = 5 (0.4%)), bicornuate (n = 1 (0.1%)) and T-shaped uteri (n = 1 (0.1%)). A total of 440 subjects who underwent ART were followed up. The pregnancy rates in women with arcuate uteri (36/66 (54.5%)) and major uterine anomalies (7/10 (70.0%)) were statistically similar (P = 0.09 and P = 0.11, respectively) to that of the matched controls with normal uteri (158/364 (43.4%)). While first-trimester miscarriage rates were similar (P = 0.81) between the control group (20/158 (12.7%)) and women with arcuate uteri (5/36 (13.9%)), women with major uterine anomalies experienced a higher miscarriage rate (3/7 (42.9%); P = 0.05). CONCLUSIONS Women who are referred for ART have a high prevalence of congenital uterine anomalies, the most common anomaly being an arcuate uterus. These anomalies are not associated with a reduction in pregnancy rates following ART. However, while the arcuate uterus was not associated with an increase in first-trimester miscarriage, major uterine anomalies seemed to increase the risk of first-trimester miscarriage.
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Affiliation(s)
- K Jayaprakasan
- Nottingham University Research and Treatment Unit in Reproduction, Division of Human Development, School of Clinical Sciences, University of Nottingham, Nottingham, UK.
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Kalita A, Qi H, Murai H, Kurosky A, Boldogh I, Hazra T, Corry D, Sur S. NADPH Oxidase In Ragweed Pollen Promotes Th2 Differentiation Of Naïve T-cells And Induces IL-33 Secretion From BMDCs Via TLR4 And MYD88 Dependent Pathways. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Qi H, Murai H, Kalita A, Sur S. In vivo Exposure of Mice to Alternaria Alternata Induces IL-18 Release into the Airways: A Cause of Allergic Asthma? J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.511] [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: 11/25/2022]
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Sur S, Marsh A, Campbell B, Raine-Fenning N. Re: Gestational sac volume: comparison between SonoAVC and VOCAL measurements at 11 + 0 to 13 + 6 weeks of gestation. Ultrasound Obstet Gynecol 2010; 36:648-651. [PMID: 20981721 DOI: 10.1002/uog.8833] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Abstract
First Rank Symptoms (FRS) were first defined by Schneider as diagnostic of schizophrenia. Since then, there has been an immense debate on their diagnostic and prognostic utility. This review attempts to understand the concepts of FRS as depicted over the years and the diagnostic and prognostic implications of FRS in mental illnesses including schizophrenia. Review of relevant material showed that there are wide variations in the concepts of FRS which may be classified according to broad and narrow definitions. These variations have also led to the differences in the diagnostic systems currently being used. Although the diagnostic utility of FRS in schizophrenia remains, it is not clearly so with other mental illnesses in which these symptoms may also be observed. In addition there is controversy over the prognostic implications with evidence divided between poor and no influence on outcome.
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Affiliation(s)
- S Saddichha
- National Institute of Mental Health & Neurosciences (NIMHANS), Bangalore, India.
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Vaidya S, Murai H, Kalita A, Sur S. Ragweed Extract (RWE) Provides Danger Signal to Human Dendritic Cells That Facilitates a Th2 Response Against Bystander Antigens. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kalita A, Vaidya S, Murai H, Stafford S, Kurosky A, Boldogh I, Hazra T, Sur S. Ragweeds Extract (RWE) Proteins That Lack NADPH Oxidase Activity (RWENOX-) Promote Th1 Response By Upregulating CD40 Expression Independent of MAP Kinases. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.422] [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: 10/19/2022]
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Singh B, Murai H, Vaidya S, Bain M, Redding D, Sur S. Ccl17 and Ccl22 Chemokine Levels in Nasal Fluids of Subjects With Allergic Rhinitis After Challenge With Ragweed Extract. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.440] [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: 10/19/2022]
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Sur S, Murphy KW, Mackenzie IZ. Delivery after caesarean section: consultant obstetricians' professional advice and personal preferences. J OBSTET GYNAECOL 2009; 29:212-6. [PMID: 19358027 DOI: 10.1080/01443610902735785] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The objective of this study was to determine how obstetricians would wish to be managed in their own pregnancy and their advice to patients delivering after a caesarean section. A questionnaire was sent to 219 consultant obstetricians in two large UK medical deaneries investigating their personal preferences for delivery and management of spontaneous, augmented and induced labour after a caesarean section and how they advise their patients related to the indication for the previous caesarean section. Responses were analysed according to age and gender. The questionnaire yielded a 68% response rate. None would counsel against labour unless there were contraindications. The majority would recommend labour for all indications for the previous caesarean section, although personal preferences were lower (p<0.04): 56% would recommend labour to their patients after a failed instrumental delivery, but only 36% would personally choose that option (p<0.002). Female obstetricians would contemplate and recommend labour more readily than males. Labour augmentation and induction was more frequently recommended (66% and 57%, respectively) than opted for personally (57% and 52%). Reluctance for labour augmentation and induction was greatest among younger consultants. While the majority of consultants favour labour for themselves and recommend this for their patients, it was reassuring to note that patients are encouraged to make the final decision. Informed patient choice is paramount and it is therefore important that full information about risks and benefits is available.
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Affiliation(s)
- S Sur
- John Radcliffe Hospital, Oxford, UK.
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Vaidya S, Singh B, Dharajiya N, Sinha M, Boldogh I, Sur S. Genes Involved in the Allergic Airway Inflammation Induced by Ragweed Extract (RWE) Associated NADPH Oxidase. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.762] [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: 10/21/2022]
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Kalita A, stafford S, Soman K, Kurosky A, Sur S. Identification of Candidate Proteins in Ragweed Extract (RWE) serves as alarmins that produce ROS and Induce Th2 Cytokine Production. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.452] [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: 10/21/2022]
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Murai H, Redding D, Gonzalez K, Singh B, Kalita A, Qi H, Cardenas Jr. V, Sur S. Pollen NADPH Oxidases Increase Intracellular ROS (iROS) And IL5 Production From PBMC Of Ragweed Allergic Patients With Late Phase Symptoms To Intranasal Ragweed Challenge. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.983] [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: 10/21/2022]
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Aguilera-Aguirre L, Saavedra-Molina A, Bacsi A, Sur S, Boldogh I. Oxidative Damage to Mitochondrial Respiratory Chain Complexes Increases Allergic Airway Inflammation in Mice. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.448] [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: 11/29/2022]
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Qi H, Redding D, Kurosky A, Singh B, Boldogh I, Soman K, Grant J, Cardenas V, Sur S. Identification of Biomarkers in Nasal Lavage Fluid (NLF) Associated with Early and Late Phase Symptoms Induced by Intranasal Challenge with Ragweed Extract (RWE). J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.450] [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: 11/16/2022]
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Browne G, Sur S, Singh B, Dhara N. Identification of Genes of the Innate Immune System Induced by Oxidative Stress From Ragweed Extract (RWE) Challenge. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.449] [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: 11/28/2022]
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Lane C, Redding D, Gonzalez K, Cardenas V, Boldogh I, Sur S. Topical N-acetyl cysteine (NAC) Reduces Late Phase Nasal Symptoms Following Ragweed Challenge. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.170] [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: 10/21/2022]
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Sen A, Mondal UK, Sur S, Bothra AK. Comparative analysis of codon usage patterns and identification of predicted highly expressed genes in fiveSalmonellagenomes. Indian J Med Microbiol 2008; 26:313-21. [DOI: 10.4103/0255-0857.43558] [Citation(s) in RCA: 2] [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: 11/04/2022]
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Patel J, Hotez P, Dharajiya N, Sur S. Hookworm Protein Necator Americanus-Ancyclostoma Secreted Protein 2 (Na-Asp-2) Inhibits Allergic Airway Inflammation. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.11.649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sur S, Chitranshi S, Ganesh S, Moona R, Sharma M, Bajpai S, Katiyar S. Living in Farming Communities (FC) Provides Children Greater Protection Against Asthma Attacks than Living in Poor Hygienic Conditions (PHC). J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.11.200] [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: 10/23/2022]
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Saavedra M, Dharajiya N, Redding D, Boldogh I, Lee C, Sur S. Scavenging of Reactive Oxidative Species (ROS) Generated by Pollen NADPH Oxidases Inhibits Th2 and Th17 Cytokine Production from Johnson Grass (JG) Sensitized Human Peripheral Blood Mononuclear Cells (PBMCs). J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.12.507] [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: 11/29/2022]
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Dharajiya N, Sur S. Mycobacterial Products Augment Ragweed Induced Allergic Airway Inflammation. J Allergy Clin Immunol 2006. [DOI: 10.1016/j.jaci.2005.12.1241] [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: 10/24/2022]
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Horner C, Dharajiya N, Boldogh I, Sur S. PI-3 Kinase Upregulation: a Constituent of Pollen NADPH Oxidase-induced Signal 1? J Allergy Clin Immunol 2006. [DOI: 10.1016/j.jaci.2005.12.577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hazra TK, Ghosh AK, Roy P, Roy S, Sur S. An impacted meat bone in the larynx with an unusual presentation. Indian J Otolaryngol Head Neck Surg 2005; 57:145-6. [PMID: 23120154 PMCID: PMC3450976 DOI: 10.1007/bf02907672] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Lodgment of foreign bodies in the aero-digestive tract commonly occurs in the infant and children (Hazra et al, Indian J Otolaryngol Head Neck Surg 1993;2:216). Children especially between 1 and 3 years appear to be more vulnerable (Aylec et al, J Thoracic Cardiovascular Surg 1977;74:145). Ninety percent of these foreign bodies are accidental in nature and are due to carelessness and are avoidable (Holinger and Holinger. Chest 1978;73:721). Lodgment of foreign body has been usually seen to occur in mentally retarded intoxicated, or edentulous adult and to some other persons like fishermen. electrician, and decoration worker who use to hold those materials in between their teeth during their work. Usually, the victims present with respiratory distress. hoarseness of voice and/or dysphagia, which are proceeded by a severe history of choking cough immediately after ingestion of foreign bodies. Heroic attempts of removal of the foreign bodies may be dangerous to life. Therefore, each case should be dealt with proper care and precautionary measures. Here we present a case of an impacted meat bone in the larynx with the only complaint of hoarseness of voice for 2 weeks.
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Affiliation(s)
- T K Hazra
- 26A, Surah, 3rd Lane, 700010 Kolkata, India
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Gorska M, Stafford S, Liang Q, Dharajiya N, Sur S, Gaestel M, Alam R. The lack of allergic inflammation in MK2-deficient mice is not due to the impairment of the immune response but is associated with aberrant endothelial function. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.495] [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: 11/16/2022]
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Dharajiya N, Estrada A, Choudhury B, Alam R, Clancy B, Sur S. Allergen challenge induces a Th1 signature characterized by upregulation of IFN-γ induced GTPase family of proteins. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.193] [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: 11/28/2022]
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Mishra SK, Dash PK, Keshri P, Jena S, Sur S. Myxoma of maxilla. Indian J Otolaryngol Head Neck Surg 2003; 55:28-9. [PMID: 23119931 DOI: 10.1007/bf02968749] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
A case of Myxoma involving left Maxilla, presenting as swelling of left side of face and Oral cavity with bilateral nasal obstruction is reported.
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Affiliation(s)
- S K Mishra
- ENT Dept., V S. S Medical College, Burla, Dt Sambalpur, Orissa
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Leonard P, Stafford S, Calhoun K, Buckingham E, Decherd M, Grant J, Sur S, Alam R. Phosphoproteomic analyses of upper airway mucosa reveal activation of select signaling pathways in patients with allergic rhinitis. J Allergy Clin Immunol 2003. [DOI: 10.1016/s0091-6749(03)81049-7] [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: 11/24/2022]
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Chan L, Sur S, Alam R, Wild J, Chan T. Development of asthma phenotype in ada and rag1 double deficient mice. J Allergy Clin Immunol 2003. [DOI: 10.1016/s0091-6749(03)81002-3] [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: 10/24/2022]
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Choudhury B, Wild J, Alam R, Sur S. Role of IL-18 mediated innate immune response in IL-4 and STAT-6 independent Th2 differentiation. J Allergy Clin Immunol 2003. [DOI: 10.1016/s0091-6749(03)81302-7] [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: 10/24/2022]
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Rais M, Wild JS, Choudhury BK, Alam R, Stafford S, Dharajiya N, Sur S. Interleukin-12 inhibits eosinophil differentiation from bone marrow stem cells in an interferon-gamma-dependent manner in a mouse model of asthma. Clin Exp Allergy 2002; 32:627-32. [PMID: 11972612 DOI: 10.1046/j.0954-7894.2002.01350.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Intrapulmonary administration of IL-12 has been shown to inhibit the number of eosinophils in lung murine models of asthma, but the precise mechanism of this inhibition has not been reported. The purpose of this study was to examine whether IL-12 treatment inhibits bone marrow eosinophilopoiesis, and to elucidate the role of IFN-gamma in this process. OBJECTIVE To elucidate the in vivo and in vitro effects of IL-12 on eosinophil differentiation from murine bone marrow (BM) stem cells, and to examine the mechanistic role of IFN-gamma in this process. METHODS Allergen-sensitized BALB/c mice were administered low doses of intranasal IL-12 at the time of allergen challenge, and the number of eosinophils in BM was determined 3 days later. The direct actions of IL-12 on eosinophil differentiation from BM cells were determined in vitro. The mechanistic role of IFN-gamma was assessed by measuring IFN-gamma induction by IL-12 in BM cell cultures, and through the use of IFN-gamma KO mice. RESULTS Treatment of allergic mice with intrapulmonary IL-12 (1 ng or 10 ng) reduced eosinophils in BM by 43%. Culture of BM cells from allergen-sensitized mice with IL-3 + IL-5 induced eosinophil differentiation in vitro. Addition of IL-12 to these cultures inhibited eosinophil differentiation, with maximal inhibition (45%) occurring at 10 ng/mL IL-12 concentration. IL-12 induced IFN-gamma production from BM cultures, and failed to inhibit eosinophil differentiation in IFN-gamma-knockout mice, indicating a critical mechanistic role for IFN-gamma. CONCLUSION This study demonstrates that IL-12 selectively inhibits BM eosinophilopoiesis, and that this effect is mediated by IFN-gamma. Intrapulmonary IL-12 has suppressive effects on BM eosinophilopoiesis that may represent a novel mechanism contributing to the anti-eosinophilic effects of IL-12 in allergic airway disease.
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Affiliation(s)
- M Rais
- Department of Internal Medicine, Division of Allergy and Immunology, University of Texas Medical Branch, Galveston, Texas 77555, USA
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Hunt LW, Gleich GJ, Kita H, Weiler DA, Schroeder DR, Vuk-Pavlovic Z, Sur S. Removal of bronchoalveolar cells augments the late eosinophilic response to segmental allergen challenge. Clin Exp Allergy 2002; 32:210-6. [PMID: 11929484 DOI: 10.1046/j.1365-2222.2002.01228.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND In patients with quiescent asthma, macrophages are the most prevalent cells recovered by bronchoalveolar lavage (BAL). Through activation via their FcepsilonRII receptors or by acting as antigen-presenting cells, macrophages could, in theory, promote the late airway response to allergen. OBJECTIVE In order to investigate the importance of macrophages and other airway luminal cells in inducing the late airway response, a novel washout experiment was designed. METHODS Five patients with ragweed-allergic asthma underwent bronchoscopy and segmental bronchial challenge with either normal saline or short ragweed extract in two segments of one lung. In a third segment of the opposite lung, 12 successive BALs (25 mL each) were performed, followed by challenge with an identical dose of short ragweed (washed-challenged segment). After 24 h, all three challenged segments underwent BAL. RESULTS Initially, in the washed-challenged segment, over 80% (mean 80.4%, range 68-88%) of the recoverable airway dwelling cells were removed. Unexpectedly, 24 h later these same washed-challenged segments contained more eosinophils in the BAL than the challenged segments from the opposite lung (P = 0.033). CONCLUSIONS Removing the majority of airway luminal cells followed by allergen bronchoprovocation increased the number of eosinophils recovered 24 h after challenge. Our results suggest that in quiescent allergic asthma, the airway luminal cells are protective and attenuate the late eosinophilic response to allergen challenge.
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Affiliation(s)
- L W Hunt
- Division of Allergic Diseases/Department of Internal Medicine, Mayo Clinic and Foundation, Rochester, Minnesota, USA.
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Affiliation(s)
- J S Wild
- Department of Internal Medicine, Division of Allergy and Immunology, University of Texas Medical Branch, Galveston, Texas 77555
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Güler-Uysal F, Kozanoglu E, Sur S, Göncü K. Spondyloarthropathy and Turner's syndrome. Clin Exp Rheumatol 2001; 19:232-3. [PMID: 11326499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Justice JP, Shibata Y, Sur S, Mustafa J, Fan M, Van Scott MR. IL-10 gene knockout attenuates allergen-induced airway hyperresponsiveness in C57BL/6 mice. Am J Physiol Lung Cell Mol Physiol 2001; 280:L363-8. [PMID: 11159016 DOI: 10.1152/ajplung.2001.280.2.l363] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Intratracheal administration of interleukin-10 (IL-10) has been reported to inhibit allergic inflammation but augment airway hyperresponsiveness (AHR). In the present study, airway and smooth muscle responsiveness to methacholine (MCh) were compared in wild-type (WT) and IL-10-deficient (IL-10-KO) mice to investigate the role of endogenous IL-10 in AHR development. Naive WT and IL-10-KO mice exhibited similar dose-dependent increases in airway resistance (Raw) to intravenous MCh. Sensitization and challenge with ragweed (RW) induced a twofold increase in responsiveness to intravenous MCh in WT mice, but hyperresponsiveness was not observed in similarly treated IL-10-KO mice. Likewise, tracheal rings from RW-sensitized and -challenged WT mice exhibited a fourfold greater responsiveness to MCh than IL-10-KO tracheal preparations. Measurements of airway constriction by whole body plethysmography further supported the Raw and tracheal ring data (i.e., AHR was not observed in the absence of IL-10). Interestingly, factors previously implicated in the development of AHR, including IL-4, IL-5, IL-13, IgA, IgG1, IgE, eosinophilia, and lymphocyte recruitment to the airways, were upregulated in the IL-10-KO mice. Treatment with recombinant murine IL-10 at the time of allergen challenge reduced the magnitude of inflammation but reinstated AHR development in IL-10-KO mice. Adoptive transfer of mononuclear splenocytes to IL-10-sufficient severe combined immunodeficient mice indicated that lymphocytes were an important source of the IL-10 impacting AHR development. These results provide evidence that IL-10 expression promotes the development of allergen-induced smooth muscle hyperresponsiveness.
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Affiliation(s)
- J P Justice
- Departments of Physiology and Pharmacology, Brody School of Medicine at East Carolina University, Greenville, North Carolina 27858, USA
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