1
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Thomas M, McGonagle K, Rowland P, Robinson DA, Dodd PG, Camino-Díaz I, Campbell L, Cantizani J, Castañeda P, Conn D, Craggs PD, Edwards D, Ferguson L, Fosberry A, Frame L, Goswami P, Hu X, Korczynska J, MacLean L, Martin J, Mutter N, Osuna-Cabello M, Paterson C, Peña I, Pinto EG, Pont C, Riley J, Shishikura Y, Simeons FRC, Stojanovski L, Thomas J, Wrobel K, Young RJ, Zmuda F, Zuccotto F, Read KD, Gilbert IH, Marco M, Miles TJ, Manzano P, De Rycker M. Structure-Guided Design and Synthesis of a Pyridazinone Series of Trypanosoma cruzi Proteasome Inhibitors. J Med Chem 2023; 66:10413-10431. [PMID: 37506194 PMCID: PMC10424187 DOI: 10.1021/acs.jmedchem.3c00582] [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: 03/31/2023] [Indexed: 07/30/2023]
Abstract
There is an urgent need for new treatments for Chagas disease, a parasitic infection which mostly impacts South and Central America. We previously reported on the discovery of GSK3494245/DDD01305143, a preclinical candidate for visceral leishmaniasis which acted through inhibition of the Leishmania proteasome. A related analogue, active against Trypanosoma cruzi, showed suboptimal efficacy in an animal model of Chagas disease, so alternative proteasome inhibitors were investigated. Screening a library of phenotypically active analogues against the T. cruzi proteasome identified an active, selective pyridazinone, the development of which is described herein. We obtained a cryo-EM co-structure of proteasome and a key inhibitor and used this to drive optimization of the compounds. Alongside this, optimization of the absorption, distribution, metabolism, and excretion (ADME) properties afforded a suitable compound for mouse efficacy studies. The outcome of these studies is discussed, alongside future plans to further understand the series and its potential to deliver a new treatment for Chagas disease.
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Affiliation(s)
- Michael
G. Thomas
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Kate McGonagle
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Paul Rowland
- GlaxoSmithKline,
Chemistry, Medicines Research Centre, Gunnels Wood Road, Stevenage, U.K., SG1 2NY
| | - David A. Robinson
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Peter G. Dodd
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Isabel Camino-Díaz
- GlaxoSmithKline,
Discovery DMPK, IVIVT, Severo Ochoa 2, PTM, Tres Cantos, Madrid ES 28760, Spain
| | - Lorna Campbell
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Juan Cantizani
- GlaxoSmithKline,
Global Health R&D, Severo Ochoa 2, PTM, Tres Cantos, Madrid ES 28760, Spain
| | - Pablo Castañeda
- GlaxoSmithKline,
Discovery DMPK, IVIVT, Severo Ochoa 2, PTM, Tres Cantos, Madrid ES 28760, Spain
| | - Daniel Conn
- GlaxoSmithKline,
Chemistry, Medicines Research Centre, Gunnels Wood Road, Stevenage, U.K., SG1 2NY
| | - Peter D. Craggs
- GlaxoSmithKline,
Chemistry, Medicines Research Centre, Gunnels Wood Road, Stevenage, U.K., SG1 2NY
| | - Darren Edwards
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Liam Ferguson
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Andrew Fosberry
- GlaxoSmithKline,
Chemistry, Medicines Research Centre, Gunnels Wood Road, Stevenage, U.K., SG1 2NY
| | - Laura Frame
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Panchali Goswami
- GlaxoSmithKline,
Chemistry, Medicines Research Centre, Gunnels Wood Road, Stevenage, U.K., SG1 2NY
| | - Xiao Hu
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Justyna Korczynska
- GlaxoSmithKline,
Chemistry, Medicines Research Centre, Gunnels Wood Road, Stevenage, U.K., SG1 2NY
| | - Lorna MacLean
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Julio Martin
- GlaxoSmithKline,
Global Health R&D, Severo Ochoa 2, PTM, Tres Cantos, Madrid ES 28760, Spain
| | - Nicole Mutter
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Maria Osuna-Cabello
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Christy Paterson
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Imanol Peña
- GlaxoSmithKline,
Global Health R&D, Severo Ochoa 2, PTM, Tres Cantos, Madrid ES 28760, Spain
| | - Erika G. Pinto
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Caterina Pont
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Jennifer Riley
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Yoko Shishikura
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Frederick R. C. Simeons
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Laste Stojanovski
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - John Thomas
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Karolina Wrobel
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | | | - Filip Zmuda
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Fabio Zuccotto
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Kevin D. Read
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Ian H. Gilbert
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
| | - Maria Marco
- GlaxoSmithKline,
Global Health R&D, Severo Ochoa 2, PTM, Tres Cantos, Madrid ES 28760, Spain
| | - Timothy J. Miles
- GlaxoSmithKline,
Global Health R&D, Severo Ochoa 2, PTM, Tres Cantos, Madrid ES 28760, Spain
| | - Pilar Manzano
- GlaxoSmithKline,
Global Health R&D, Severo Ochoa 2, PTM, Tres Cantos, Madrid ES 28760, Spain
| | - Manu De Rycker
- Drug
Discovery Unit, University of Dundee, School
of Life Sciences, Dow Street, Dundee, U.K., DD1 5EH
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2
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Veggi D, Dello Iacono L, Malito E, Maruggi G, Giusti F, Goswami P, Pansegrau W, Marchi S, Tomei S, Luzzi E, Bottomley MJ, Fontani F, Ferlenghi I, Scarselli M. Effective Multivalent Oriented Presentation of Meningococcal NadA Antigen Trimers by Self-Assembling Ferritin Nanoparticles. Int J Mol Sci 2023; 24:ijms24076183. [PMID: 37047152 PMCID: PMC10093968 DOI: 10.3390/ijms24076183] [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] [Received: 02/24/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 04/14/2023] Open
Abstract
The presentation of viral antigens on nanoparticles in multivalent arrays has emerged as a valuable technology for vaccines. On the nanoparticle surface, highly ordered, repetitive arrays of antigens can mimic their geometric arrangement on virion surfaces and elicit stronger humoral responses than soluble viral antigens. More recently, bacterial antigens have been presented on self-assembling protein nanoparticles and have elicited protective antibody and effective T-helper responses, further supporting the nanoparticle platform as a universal approach for stimulating potent immunogenicity. Here, we present the rational design, structural analysis, and immunogenicity of self-assembling ferritin nanoparticles displaying eight copies of the Neisseria meningitidis trimeric adhesin NadA. We engineered constructs consisting of two different NadA fragments, head only and head with stalk, that we fused to ferritin and expressed in Escherichia coli. Both fusion constructs self-assembled into the expected nanoparticles as determined by Cryo electron microscopy. In mice, the two nanoparticles elicited comparable NadA antibody levels that were 10- to 100-fold higher than those elicited by the corresponding NadA trimer subunits. Further, the NadAferritin nanoparticles potently induced complement-mediated serum bactericidal activity. These findings confirm the value of self-assembling nanoparticles for optimizing the immunogenicity of bacterial antigens and support the broad applicability of the approach to vaccine programs, especially for the presentation of trimeric antigens.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Sara Tomei
- GSK, Via Fiorentina 1, 53100 Siena, Italy
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3
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Goswami P, Adeniran O, Frantz S, Matsuoka L, Du L, Gandhi R, Collins Z, Matrana M, Petroziello M, Brower J, Sze D, Kennedy A, Golzarian J, Wang E, Brown D. Abstract No. 196 Overall survival and toxicities of advanced hepatocellular carcinoma (HCC) Barcelona clinic liver cancer C (BCLC-C) patients following Y-90 radioembolization: assessment from the RESiN Registry (NCT: 02685631). J Vasc Interv Radiol 2022. [DOI: 10.1016/j.jvir.2022.03.277] [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: 11/27/2022] Open
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4
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Soni G, Jain S, Rathi P, Goswami P. CURRENT TRENDS IN PRESCRIBING PATTERN OF ANTI-MIGRAINE DRUGS IN PATIENTS OF MIGRAINE AT A TERTIARY CARE TEACHING HOSPITAL. IJMMR 2022. [DOI: 10.11603/ijmmr.2413-6077.2021.2.12636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background. An inappropriate prescribing pattern of antimigraine drugs by doctors may often encourage inappropriate self-medication by patients because of the asymmetry of medical information.
Objective. The study is aimed to assess the current trends in prescribing patterns of anti-migraine drugs, rationality of prescription, and pattern of migraine severity in patients of migraine.
Methods. A cross sectional study was conducted at a tertiary care teaching hospital. All the prescribing details including patient’s demographic details, diagnosis, details of drug therapy (drug name, dose, duration, and frequency) were recorded. Rationality of prescription was assessed using the WHO core drug prescribing indicators and the pattern of severity of migraine was assessed using MIDAS scoring system.
Results. Out of 85 patients, 71 were female (83.5%), mostly around 21-30 years of age, and 27 (31.7%) patients had other comorbidities. Naproxen was the most commonly used NSAID for termination of acute migraine attack (15.3 %). The most common drugs prescribed for prophylaxis included beta adrenergic blockers (Propranolol, 14.66%), antidepressants (Amitriptyline, 9.33% and Fluoxetine 3.33%), and antipsychotics (Prochlorperazine, 4.66%). Domperidone (17.30%) was the most commonly prescribed antiemetic. Prescription of triptans was low (2.66%) with Rizatriptan as the most commonly prescribed triptan.
Conclusions. The current study revealed that further improvements are required in prescribing practices especially in average number of drugs per prescription, prescription of drugs with generic names, and prescription of drugs of the essential drugs list.
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5
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Goswami P, Gupta S, Joshi N, Sharma S, Singh S. Corrigendum to "Astrocyte activation and neurotoxicity: A study in different rat brain regions and in rat C6 astroglial cells" [Environ. Toxicol. Pharmacol. 40 (2015) 122-139]. Environ Toxicol Pharmacol 2022; 89:103758. [PMID: 34776397 DOI: 10.1016/j.etap.2021.103758] [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] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- P Goswami
- Toxicology Division, CSIR-CDRI, Lucknow 226031, India; Academy of Scientific & Innovative Research (AcSIR), India
| | - S Gupta
- Toxicology Division, CSIR-CDRI, Lucknow 226031, India; Academy of Scientific & Innovative Research (AcSIR), India
| | - N Joshi
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, United States
| | - S Sharma
- Toxicology Division, CSIR-CDRI, Lucknow 226031, India
| | - S Singh
- Toxicology Division, CSIR-CDRI, Lucknow 226031, India; Academy of Scientific & Innovative Research (AcSIR), India.
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6
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Callaghan C, Abukhiran I, VanRheeden R, Ali M, Petronek M, Mapuskar K, Seyedin S, Kalen A, Rodman S, Cullen J, Coleman M, Goswami P, Buatti J, Spitz D, Allen B, Caster J. Pharmacologic Ascorbate Enhances the Therapeutic Index of ATM-Inhibitor Based Chemoradiation for Colorectal Cancer. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.144] [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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7
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Thazhathe Peedika NN, Goswami P. 942 Outcome of Image Guided Intra-Articular Thumb Base Steroid Injections-Retrospective Study of Consecutive Patient Over 4 Years in A Plastic and Hand Surgery Unit in West Lothian, Scotland. Br J Surg 2021. [DOI: 10.1093/bjs/znab259.707] [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: 11/14/2022]
Abstract
Abstract
Introduction
Osteoarthritis of the thumb base is a common condition. Usually effects the elderly population causing significant disability. Modalities of treatment of osteoarthritis which includes conservative measures, non-operative interventions, and surgery.
In this study we endeavored to assess how effective are image guided steroid injections for base of thumb Osteoarthritis as assessed by subjective pain relief perceived by patient and what percentage of these patients proceed to operative treatment.
Method
Retrospective data between January 2015 and December 2018 of the patients who underwent Steroid injections to the Base of thumb joints (CMCJ and/or STTJ) for Osteoarthritis under image intensifier guidance was collected from Hospital management system –TRAK and eHealth services. Follow up of the patients were done for Maximum 1 to 5 years.
Results
A total number of 692 patients with thumb base osteoarthritis were included in the study of which 546 patients underwent Image guided steroid injection to the thumb base. The mean Age of patients was 64.5 years and the Female: Male ratio was 401:145. Mean number of injections each patient received- 3.25 (1 – 7 times). Pain relief after first, second and third injections were 3.15 months, 2.63 and 1.75 months, respectively. 127 (23.2% of injections patients) underwent trapeziectomy. Mean time between first injection & Surgery was 1.3yrs (6 months -2 years)
Conclusions
This study demonstrates the effectiveness of image guided steroid injections for thumb base osteoarthritis. Though about a quarter of these patients proceed to operative management, steroid injections can delay the same considerably.
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Affiliation(s)
| | - P Goswami
- NHS Lothian, Edinburgh, United Kingdom
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8
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Borkataki S, Katoch R, Goswami P, Bhat A, Chakraborty D. Acceleration of cutaneous wound healing by Lucilia sericata maggots in diabetic Wistar rats. Trop Biomed 2021; 38:86-93. [PMID: 33797529 DOI: 10.47665/tb.38.1.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The study was aimed to evaluate the effectiveness of maggot therapy in healing of cutaneous infected wound in streptozotocin (STZ) induced diabetic Wistar rat. For live maggots, the sterilized eggs of Lucilia sericata were obtained from colonies established in laboratory. Diabetes model was established in 48 male Wister rat by intra-peritoneal injection of STZ at the dose of 60 mg/kg body-weight. Cutaneous wounds exposed with mixed colonies of bacteria like Staphylococcus aureus, E. coli and Pseudomonas aeruginosa were prepared in all rat. The animals equally divided in 4 groups with 12 rats each being presented as treatment group of control, antibiotic, maggot and maggot with antibiotic in combination. All treatments were done once and hold for 24 hours. Wound kinetics and bacterial bio burden were measured at weekly interval to till complete healing. Significant reduction in wound area with maximum contraction was found (>95%) in maggot treated group when compared to antibiotic treated (79%) and control (72%). In maggot as well as maggot and antibiotic in combination group showed early elimination of bacterial bio-burden 7.88±0.03log CFU/ml to 1.12±0.65log CFU/ml and 7.86±0.04) log CFU/ml to 1.54±0.52log CFU/ml respectively in three weeks of time. Early healing indication was also experienced on histomorphological examination of wounded tissue of maggot treated groups by early and better epithelialization, collagenation and neovascularization with complete healing of wound in three weeks in comparison to antibiotic and control respectively. However, the present study did not show any difference in healing of wound with use of maggot alone or in antibiotic combination. Live maggot of Lucilia sericata effectively lower bacterial bioburden and and accelerate healing of infected cutaneous wound in diabetic conditions.
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Affiliation(s)
- S Borkataki
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences, SKUAST-Jammu, R S Pura, Jammu, India
| | - R Katoch
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences, SKUAST-Jammu, R S Pura, Jammu, India
| | - P Goswami
- Division of Veterinary Pathology, Faculty of Veterinary Sciences, SKUAST-Kashmir, Shuhama, Srinagar, India
| | - A Bhat
- Division of Veterinary Microbiology, Faculty of Veterinary Sciences, SKUAST-Kashmir, Shuhama, Srinagar, India
| | - D Chakraborty
- Division of Animal Genetics and Breeding, Faculty of Veterinary Sciences, SKUAST-Jammu, R S Pura, Jammu, Indi
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9
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Wyllie S, Brand S, Thomas M, De Rycker M, Chung CW, Pena I, Bingham RP, Bueren-Calabuig JA, Cantizani J, Cebrian D, Craggs PD, Ferguson L, Goswami P, Hobrath J, Howe J, Jeacock L, Ko EJ, Korczynska J, MacLean L, Manthri S, Martinez MS, Mata-Cantero L, Moniz S, Nühs A, Osuna-Cabello M, Pinto E, Riley J, Robinson S, Rowland P, Simeons FRC, Shishikura Y, Spinks D, Stojanovski L, Thomas J, Thompson S, Viayna Gaza E, Wall RJ, Zuccotto F, Horn D, Ferguson MAJ, Fairlamb AH, Fiandor JM, Martin J, Gray DW, Miles TJ, Gilbert IH, Read KD, Marco M, Wyatt PG. Preclinical candidate for the treatment of visceral leishmaniasis that acts through proteasome inhibition. Proc Natl Acad Sci U S A 2019; 116:9318-9323. [PMID: 30962368 PMCID: PMC6511062 DOI: 10.1073/pnas.1820175116] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [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] [Indexed: 01/18/2023] Open
Abstract
Visceral leishmaniasis (VL), caused by the protozoan parasites Leishmania donovani and Leishmania infantum, is one of the major parasitic diseases worldwide. There is an urgent need for new drugs to treat VL, because current therapies are unfit for purpose in a resource-poor setting. Here, we describe the development of a preclinical drug candidate, GSK3494245/DDD01305143/compound 8, with potential to treat this neglected tropical disease. The compound series was discovered by repurposing hits from a screen against the related parasite Trypanosoma cruzi Subsequent optimization of the chemical series resulted in the development of a potent cidal compound with activity against a range of clinically relevant L. donovani and L. infantum isolates. Compound 8 demonstrates promising pharmacokinetic properties and impressive in vivo efficacy in our mouse model of infection comparable with those of the current oral antileishmanial miltefosine. Detailed mode of action studies confirm that this compound acts principally by inhibition of the chymotrypsin-like activity catalyzed by the β5 subunit of the L. donovani proteasome. High-resolution cryo-EM structures of apo and compound 8-bound Leishmania tarentolae 20S proteasome reveal a previously undiscovered inhibitor site that lies between the β4 and β5 proteasome subunits. This induced pocket exploits β4 residues that are divergent between humans and kinetoplastid parasites and is consistent with all of our experimental and mutagenesis data. As a result of these comprehensive studies and due to a favorable developability and safety profile, compound 8 is being advanced toward human clinical trials.
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Affiliation(s)
- Susan Wyllie
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Stephen Brand
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Michael Thomas
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Manu De Rycker
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Chun-Wa Chung
- Medicines Research Centre, Stevenage, Hertfordshire SG1 2NY, United Kingdom
| | - Imanol Pena
- Global Health R&D, GlaxoSmithKline, Tres Cantos, 28760, Spain
| | - Ryan P Bingham
- Medicines Research Centre, Stevenage, Hertfordshire SG1 2NY, United Kingdom
| | - Juan A Bueren-Calabuig
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Juan Cantizani
- Global Health R&D, GlaxoSmithKline, Tres Cantos, 28760, Spain
| | - David Cebrian
- Global Health R&D, GlaxoSmithKline, Tres Cantos, 28760, Spain
| | - Peter D Craggs
- Medicines Research Centre, Stevenage, Hertfordshire SG1 2NY, United Kingdom
| | - Liam Ferguson
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Panchali Goswami
- Medicines Research Centre, Stevenage, Hertfordshire SG1 2NY, United Kingdom
| | - Judith Hobrath
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Jonathan Howe
- David Jack Centre for R&D, GlaxoSmithKline, Ware SG12 0DP, United Kingdom
| | - Laura Jeacock
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Eun-Jung Ko
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Justyna Korczynska
- Medicines Research Centre, Stevenage, Hertfordshire SG1 2NY, United Kingdom
| | - Lorna MacLean
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Sujatha Manthri
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | | | | | - Sonia Moniz
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Andrea Nühs
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Maria Osuna-Cabello
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Erika Pinto
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Jennifer Riley
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Sharon Robinson
- David Jack Centre for R&D, GlaxoSmithKline, Ware SG12 0DP, United Kingdom
| | - Paul Rowland
- Medicines Research Centre, Stevenage, Hertfordshire SG1 2NY, United Kingdom
| | - Frederick R C Simeons
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Yoko Shishikura
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Daniel Spinks
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Laste Stojanovski
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - John Thomas
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Stephen Thompson
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Elisabet Viayna Gaza
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Richard J Wall
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Fabio Zuccotto
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - David Horn
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Michael A J Ferguson
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Alan H Fairlamb
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Jose M Fiandor
- Global Health R&D, GlaxoSmithKline, Tres Cantos, 28760, Spain
| | - Julio Martin
- Global Health R&D, GlaxoSmithKline, Tres Cantos, 28760, Spain
| | - David W Gray
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Timothy J Miles
- Global Health R&D, GlaxoSmithKline, Tres Cantos, 28760, Spain
| | - Ian H Gilbert
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom
| | - Kevin D Read
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom;
| | - Maria Marco
- Global Health R&D, GlaxoSmithKline, Tres Cantos, 28760, Spain;
| | - Paul G Wyatt
- Drug Discovery Unit, Wellcome Centre for Anti-Infectives Research, Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom;
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10
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Poonia D, Goswami P, Mishra S. Variant morphology and arterial supply of diaphragmatic crura with probe patent foramen ovale. Morphologie 2018; 102:289-293. [PMID: 30197033 DOI: 10.1016/j.morpho.2018.07.002] [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: 05/29/2018] [Revised: 07/02/2018] [Accepted: 07/03/2018] [Indexed: 06/08/2023]
Abstract
Crura are the posterior pillars of the tendino-muscular partition between thoracic and abdominal cavity. This study highlights bilaterally an unfamiliar morphology of diaphragmatic crura with uncommon origin of inferior phrenic artery and accompanying atrial septal defect in a 63-years-old female cadaver with scoliosis. An attempt is made to portray the clinical implications of these variations. In addition authors have discussed the embryological and genetic basis of these variations. In the recent few decades, surgical correction of scoliosis involving intervention with the crura has gained pace. Knowledge about the normal as well as variant crural morphology is imperative for the surgeons to decide the correct approach during spinal corrective surgeries and for radiologist to prevent any diagnostic pitfall. Familiarity about the variant origin of inferior phrenic artery may prevent complications during treatment of pathological conditions related to inferior phrenic artery. Preoperative awareness about the coexisting atrial septal defect is vital for anesthesiologists promoting them to administer cardioprotective anesthetic drugs. To the best of our knowledge, description of such a combination of variations in anatomical literature is rare and scarcely reported. Awareness of these anatomical variations is relevant for operating surgeons, radiologists, anesthesiologists and anatomists.
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Affiliation(s)
- D Poonia
- Department of Anatomy, Maulana Azad Medical College, Bahadur Shah Zafar Road, 01 New Delhi, India
| | - P Goswami
- Department of Anatomy, Maulana Azad Medical College, Bahadur Shah Zafar Road, 01 New Delhi, India.
| | - S Mishra
- Department of Anatomy, Maulana Azad Medical College, Bahadur Shah Zafar Road, 01 New Delhi, India
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11
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Goswami P, Abid Ali F, Douglas ME, Locke J, Purkiss A, Janska A, Eickhoff P, Early A, Nans A, Cheung AMC, Diffley JFX, Costa A. Structure of DNA-CMG-Pol epsilon elucidates the roles of the non-catalytic polymerase modules in the eukaryotic replisome. Nat Commun 2018; 9:5061. [PMID: 30498216 PMCID: PMC6265327 DOI: 10.1038/s41467-018-07417-1] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [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: 06/06/2018] [Accepted: 10/28/2018] [Indexed: 12/12/2022] Open
Abstract
Eukaryotic origin firing depends on assembly of the Cdc45-MCM-GINS (CMG) helicase. A key step is the recruitment of GINS that requires the leading-strand polymerase Pol epsilon, composed of Pol2, Dpb2, Dpb3, Dpb4. While a truncation of the catalytic N-terminal Pol2 supports cell division, Dpb2 and C-terminal Pol2 (C-Pol2) are essential for viability. Dpb2 and C-Pol2 are non-catalytic modules, shown or predicted to be related to an exonuclease and DNA polymerase, respectively. Here, we present the cryo-EM structure of the isolated C-Pol2/Dpb2 heterodimer, revealing that C-Pol2 contains a DNA polymerase fold. We also present the structure of CMG/C-Pol2/Dpb2 on a DNA fork, and find that polymerase binding changes both the helicase structure and fork-junction engagement. Inter-subunit contacts that keep the helicase-polymerase complex together explain several cellular phenotypes. At least some of these contacts are preserved during Pol epsilon-dependent CMG assembly on path to origin firing, as observed with DNA replication reconstituted in vitro. Eukaryotic origin firing depends on assembly of the Cdc45-MCM-GINS (CMG) helicase, which requires the leading-strand polymerase Pol ɛ. Here the authors present a structural analysis of a CMG Pol ɛ on a DNA fork, providing insight on the steps leading productive helicase engagement to the DNA junction.
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Affiliation(s)
- Panchali Goswami
- Macromolecular Machines Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Ferdos Abid Ali
- Macromolecular Machines Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Max E Douglas
- Chromosome Replication Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Julia Locke
- Macromolecular Machines Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Andrew Purkiss
- Structural Biology Science Technology Platform, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Agnieszka Janska
- Chromosome Replication Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Patrik Eickhoff
- Macromolecular Machines Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Anne Early
- Chromosome Replication Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Andrea Nans
- Structural Biology Science Technology Platform, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Alan M C Cheung
- Department of Structural and Molecular Biology, Institute of Structural and Molecular Biology, University College London, London, UK.,Institute of Structural and Molecular Biology, Biological Sciences, Birkbeck College, London, WC1E 7HX, UK
| | - John F X Diffley
- Chromosome Replication Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Alessandro Costa
- Macromolecular Machines Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.
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12
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Borkataki S, Katoch R, Goswami P, Bhat A, Bhardwaj HR, Chakraborty D, Chandrawathani P. Therapeutic use of Lucilia sericata maggot in controlling bacterial bio-burden in Rat wound model. Trop Biomed 2018; 35:627-638. [PMID: 33601750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Delayed wound healing due to extraneous bacterial contamination, antibacterial resistance and other associated factors are of great concern in dealing patients having chronically infected wound. Medicinal properties of certain maggots of Calliphoridae family are known for its effective wound debridement therapy. The objective of the study was to evaluate the wound healing potential of maggots of Lucilia sericata in an experimentally infected cutaneous wound model in Wistar rat. The study was carried out by using male Wistar rats (n=48) by creating excisional wounds and later contaminated with mixed population of gram positive and gram-negative bacteria. Animals were divided randomly in to four groups with 12 individuals each, being denominated as control, antibiotic treated, maggot treated, and antibiotic plus maggot combination treated group. Ten pre-sterilized maggots were applied per centimetre square wound bed for 24 hours. Different wound kinetics in L. sericata maggot treated wounds revealed significant reduction in wound area with maximum contraction, early elimination of bacterial bioburden as compared to group of infected control and group of rats receiving only antibiotic treatment. The histopathological examination of wounded tissue of maggot treated groups showed early and better epithelialization, collagenation and neovascularization with complete healing of wound in two weeks. The maggot effects on healing when used singly or in combination with antibiotic were recorded to be similar. The results of the present study clearly demonstrate that the maggots of L. sericata possesses a definite antibacterial action along with removal of dead tissues and effectively reduced the bacterial bio-burden in infected wound and induced wound healing quickly.
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Affiliation(s)
- S Borkataki
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences, SKUAST-Jammu, R S Pura, Jammu, India
| | - R Katoch
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences, SKUAST-Jammu, R S Pura, Jammu, India
| | - P Goswami
- Division of Veterinary Pathology, Faculty of Veterinary Sciences, SKUAST-Kashmir, Shuhama, Srinagar, India
| | - A Bhat
- Division r of Veterinary Microbiology, Faculty of Veterinary Sciences, SKUAST-Jammu, R S Pura, Jammu, India
| | - H R Bhardwaj
- Division of Teaching Clinical Complex, Faculty of Veterinary Sciences, SKUAST-Jammu, R S Pura, Jammu, India
| | - D Chakraborty
- Division of Animal Genetic and Breeding, Faculty of Veterinary Sciences, SKUAST-Jammu, R S Pura, Jammu, India
| | - P Chandrawathani
- Research and Innovation Division, Department of Veterinary Services, Putrajaya, Malaysia
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13
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Mandal K, Kshitij A, Goswami P. Techno-Foresight in R&D. CURR SCI INDIA 2018. [DOI: 10.18520/cs/v115/i4/606-607] [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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14
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Kuroda K, Tomita T, Suzuki MT, Bareille C, Nugroho AA, Goswami P, Ochi M, Ikhlas M, Nakayama M, Akebi S, Noguchi R, Ishii R, Inami N, Ono K, Kumigashira H, Varykhalov A, Muro T, Koretsune T, Arita R, Shin S, Kondo T, Nakatsuji S. Evidence for magnetic Weyl fermions in a correlated metal. Nat Mater 2017; 16:1090-1095. [PMID: 28967918 DOI: 10.1038/nmat4987] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 08/21/2017] [Indexed: 06/07/2023]
Abstract
Weyl fermions have been observed as three-dimensional, gapless topological excitations in weakly correlated, inversion-symmetry-breaking semimetals. However, their realization in spontaneously time-reversal-symmetry-breaking phases of strongly correlated materials has so far remained hypothetical. Here, we report experimental evidence for magnetic Weyl fermions in Mn3Sn, a non-collinear antiferromagnet that exhibits a large anomalous Hall effect, even at room temperature. Detailed comparison between angle-resolved photoemission spectroscopy (ARPES) measurements and density functional theory (DFT) calculations reveals significant bandwidth renormalization and damping effects due to the strong correlation among Mn 3d electrons. Magnetotransport measurements provide strong evidence for the chiral anomaly of Weyl fermions-namely, the emergence of positive magnetoconductance only in the presence of parallel electric and magnetic fields. Since weak magnetic fields (approximately 10 mT) are adequate to control the distribution of Weyl points and the large fictitious fields (equivalent to approximately a few hundred T) produced by them in momentum space, our discovery lays the foundation for a new field of science and technology involving the magnetic Weyl excitations of strongly correlated electron systems such as Mn3Sn.
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Affiliation(s)
- K Kuroda
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - T Tomita
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
| | - M-T Suzuki
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - C Bareille
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - A A Nugroho
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
- Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, 40132 Bandung, Indonesia
| | - P Goswami
- Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, Maryland 20742- 4111, USA
- Department of Physics and Astronomy, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | - M Ochi
- Department of Physics, Osaka University, Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - M Ikhlas
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
| | - M Nakayama
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - S Akebi
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - R Noguchi
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - R Ishii
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - N Inami
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - K Ono
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - H Kumigashira
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - A Varykhalov
- Helmholtz-Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - T Muro
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan
| | - T Koretsune
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - R Arita
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
- RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Shin
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - Takeshi Kondo
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
| | - S Nakatsuji
- Institute for Solid State Physics, University of Tokyo, Kashiwa 277-8581, Japan
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
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15
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Zhou JC, Janska A, Goswami P, Renault L, Abid Ali F, Kotecha A, Diffley JFX, Costa A. CMG-Pol epsilon dynamics suggests a mechanism for the establishment of leading-strand synthesis in the eukaryotic replisome. Proc Natl Acad Sci U S A 2017; 114:4141-4146. [PMID: 28373564 PMCID: PMC5402455 DOI: 10.1073/pnas.1700530114] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The replisome unwinds and synthesizes DNA for genome duplication. In eukaryotes, the Cdc45-MCM-GINS (CMG) helicase and the leading-strand polymerase, Pol epsilon, form a stable assembly. The mechanism for coupling DNA unwinding with synthesis is starting to be elucidated, however the architecture and dynamics of the replication fork remain only partially understood, preventing a molecular understanding of chromosome replication. To address this issue, we conducted a systematic single-particle EM study on multiple permutations of the reconstituted CMG-Pol epsilon assembly. Pol epsilon contains two flexibly tethered lobes. The noncatalytic lobe is anchored to the motor of the helicase, whereas the polymerization domain extends toward the side of the helicase. We observe two alternate configurations of the DNA synthesis domain in the CMG-bound Pol epsilon. We propose that this conformational switch might control DNA template engagement and release, modulating replisome progression.
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Affiliation(s)
- Jin Chuan Zhou
- Macromolecular Machines Laboratory, The Francis Crick Institute, London, NW1 1AT, United Kingdom
| | - Agnieszka Janska
- Chromosome Replication Laboratory, The Francis Crick Institute, London, NW1 1AT, United Kingdom
| | - Panchali Goswami
- Macromolecular Machines Laboratory, The Francis Crick Institute, London, NW1 1AT, United Kingdom
| | - Ludovic Renault
- Macromolecular Machines Laboratory, The Francis Crick Institute, London, NW1 1AT, United Kingdom
| | - Ferdos Abid Ali
- Macromolecular Machines Laboratory, The Francis Crick Institute, London, NW1 1AT, United Kingdom
| | - Abhay Kotecha
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, United Kingdom
| | - John F X Diffley
- Chromosome Replication Laboratory, The Francis Crick Institute, London, NW1 1AT, United Kingdom
| | - Alessandro Costa
- Macromolecular Machines Laboratory, The Francis Crick Institute, London, NW1 1AT, United Kingdom;
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16
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Samora CP, Saksouk J, Goswami P, Wade BO, Singleton MR, Bates PA, Lengronne A, Costa A, Uhlmann F. Ctf4 Links DNA Replication with Sister Chromatid Cohesion Establishment by Recruiting the Chl1 Helicase to the Replisome. Mol Cell 2016; 63:371-84. [PMID: 27397686 PMCID: PMC4980427 DOI: 10.1016/j.molcel.2016.05.036] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 04/24/2016] [Accepted: 05/26/2016] [Indexed: 12/02/2022]
Abstract
DNA replication during S phase is accompanied by establishment of sister chromatid cohesion to ensure faithful chromosome segregation. The Eco1 acetyltransferase, helped by factors including Ctf4 and Chl1, concomitantly acetylates the chromosomal cohesin complex to stabilize its cohesive links. Here we show that Ctf4 recruits the Chl1 helicase to the replisome via a conserved interaction motif that Chl1 shares with GINS and polymerase α. We visualize recruitment by EM analysis of a reconstituted Chl1-Ctf4-GINS assembly. The Chl1 helicase facilitates replication fork progression under conditions of nucleotide depletion, partly independently of Ctf4 interaction. Conversely, Ctf4 interaction, but not helicase activity, is required for Chl1's role in sister chromatid cohesion. A physical interaction between Chl1 and the cohesin complex during S phase suggests that Chl1 contacts cohesin to facilitate its acetylation. Our results reveal how Ctf4 forms a replisomal interaction hub that coordinates replication fork progression and sister chromatid cohesion establishment.
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MESH Headings
- Acetyltransferases/metabolism
- Acylation
- Cell Cycle Proteins/metabolism
- Chromatids/enzymology
- Chromatids/genetics
- Chromosomal Proteins, Non-Histone/genetics
- Chromosomal Proteins, Non-Histone/metabolism
- Chromosomal Proteins, Non-Histone/ultrastructure
- Chromosomes, Fungal/enzymology
- Chromosomes, Fungal/genetics
- DNA, Fungal/biosynthesis
- DNA, Fungal/genetics
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/metabolism
- DNA-Binding Proteins/ultrastructure
- Microscopy, Electron, Transmission
- Models, Molecular
- Multiprotein Complexes
- Nuclear Proteins/metabolism
- Protein Binding
- Protein Interaction Domains and Motifs
- S Phase
- Saccharomyces cerevisiae/enzymology
- Saccharomyces cerevisiae/genetics
- Saccharomyces cerevisiae/growth & development
- Saccharomyces cerevisiae Proteins/genetics
- Saccharomyces cerevisiae Proteins/metabolism
- Saccharomyces cerevisiae Proteins/ultrastructure
- Structure-Activity Relationship
- Time Factors
- Cohesins
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Affiliation(s)
- Catarina P Samora
- Chromosome Segregation Laboratory, Francis Crick Institute, London WC2A 3LY, UK
| | - Julie Saksouk
- Institute of Human Genetics (IGH), CNRS, 34396 Montpellier, France
| | - Panchali Goswami
- Macromolecular Machines Laboratory, Francis Crick Institute, South Mimms EN6 3LD, UK
| | - Ben O Wade
- Structural Biology of Chromosome Segregation Laboratory, Francis Crick Institute, London WC2A 3LY, UK
| | - Martin R Singleton
- Structural Biology of Chromosome Segregation Laboratory, Francis Crick Institute, London WC2A 3LY, UK
| | - Paul A Bates
- Biomolecular Modelling Laboratory, Francis Crick Institute, London WC2A 3LY, UK
| | | | - Alessandro Costa
- Macromolecular Machines Laboratory, Francis Crick Institute, South Mimms EN6 3LD, UK
| | - Frank Uhlmann
- Chromosome Segregation Laboratory, Francis Crick Institute, London WC2A 3LY, UK.
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17
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Abstract
There has been limited success defining environmental factors important to the development of connective tissue diseases such as systemic lupus erythematosus (SLE). Recent work has suggested that the perinatal environment may be important. To investigate this we measured antinuclear antibodies (ANA) in a general population with well-defined early lives to see whether fetal and infant growth and infections were associated with ANA positivity in adult life. Included in our investigation were 1334 individuals (668 men, 666 women) from the Hertfordshire cohort study. ANA was measured using an ANA ELISA and confirmed using immunofluorescence. We investigated associations between the presence of ANA and early growth and infectious exposure in infancy in men and women combined, but with adjustment for gender throughout. A positive ANA was present in 73 (10.9%) of men and 81 (12.2%) women. Of these, 26 women and 14 men were positive using IF on HEP2 cells. Sharing a bedroom during childhood was associated with a higher risk of being ANA positive (odds ratio (OR), 1.42, 95% confidence interval (CI) 1.00-2.01, P = 0.05). A record of diarrhoeal illness (OR 2.12 95% CI 1.07, 4.23, P = 0.03) and rubella or mumps during the first year of life (OR 16.12, 95% CI 2.92, 88.94, P = 0.001) was also significantly associated with ANA in adult life. Higher ANA titres by Inova ELISA were associated with infections in the first year of life from mumps (2.74-fold higher, 95% CI 0.98, 7.64, P = 0.05) and rubella (3.90-fold higher, 95% CI 1.89, 8.04, P < 0.001). In addition, higher ANA titres were also associated with mumps (1.26-fold higher, 95% CI 1.02, 1.56, P = 0.03) between one and five years of age. Our results suggest that a developing immune system exposed to increased infection is more likely to produce ANA in adult life and perhaps begin the pathological process that leads to SLE.
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Affiliation(s)
- C J Edwards
- Medical Research Council Epidemiology Resource Centre, Southampton, UK.
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18
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Abstract
The objective was to identify the main factors and interactions influencing the fibre diameter in the production of electrospun cellulose acetate (CA) webs. A systematic parameter study was completed for producing electrospun CA fibres that were substantially free of bead defects and the effect of different process parameters during electrospinning CA were evaluated in respect of mean fibre diameter. The experiments were planned using factorial designs. Altogether three parameters, each at three levels, were selected for this study. The results indicate that polymer concentration, voltage and flow rate interact so that the magnitude of any change in the mean fibre diameter is dependent upon the level of the other factors. Furthermore, stable electrospinning conditions for CA were confirmed using an acetone: N, N-dimethylacetamide (DMAc) (2:1) solvent system that minimised the presence of structural defects in the web and promoted uniform fibre diameters.
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19
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Kim YJ, Gallien S, El-Khoury V, Goswami P, Sertamo K, Schlesser M, Berchem G, Domon B. Quantification of SAA1 and SAA2 in lung cancer plasma using the isotype-specific PRM assays. Proteomics 2015; 15:3116-25. [PMID: 26177823 DOI: 10.1002/pmic.201400382] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [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: 08/08/2014] [Revised: 03/27/2015] [Accepted: 07/13/2015] [Indexed: 12/24/2022]
Abstract
The quantification of plasma proteins using the high resolution and accurate mass (HR/AM)-based parallel reaction monitoring (PRM) method provides an immediate benefit over the conventional SRM-based method in terms of selectivity. In this study, multiplexed PRM assays were developed to analyze isotypes of serum amyloid A (SAA) proteins in human plasma with a focus on SAA1 and SAA2. Elevated plasma levels of these proteins in patients diagnosed with lung cancer have been reported in previous studies. Since SAA1 and SAA2 are highly homologous, the available immunoassays tend to overestimate their concentrations due to cross-reactivity. On the other hand, when mass spectrometry (MS)-based assays are used, the presence of the several allelic variants may result in a problem of underestimation. In the present study, eight peptides that represent the target proteins at three different levels: isotype-specific (SAA1α, SAA 1β, SAA1γ, SAA2α, SAA2β), protein-specific (SAA1 or SAA2), and pan SAA (SAA1 and SAA2) were chosen to differentiate SAAs in lung cancer plasma samples using a panel of PRM assays. The measurement of specific isotypes, leveraging the analytical performance of PRM, allowed to quantify the allelic variants of both target proteins. The isotypes detected were corroborated with the genetic information obtained from the same samples. The combination of SAA2α and SAA2β assays representing the total SAA2 concentration demonstrated a superior analytical outcome than the previously used assay on the common peptide when applied to the detection of lung cancer.
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Affiliation(s)
- Yeoun Jin Kim
- Luxembourg Clinical Proteomics Center, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Sebastien Gallien
- Luxembourg Clinical Proteomics Center, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Victoria El-Khoury
- Laboratory of Experimental Hemato-Oncology, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Panchali Goswami
- Luxembourg Clinical Proteomics Center, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Katriina Sertamo
- Luxembourg Clinical Proteomics Center, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Marc Schlesser
- Service de Pneumologie, Centre Hospitalier du Luxembourg, Strassen, Luxembourg
| | - Guy Berchem
- Laboratory of Experimental Hemato-Oncology, Luxembourg Institute of Health, Strassen, Luxembourg.,Service d'Hémato-Cancérologie, Centre Hospitalier de Luxembourg, Strassen, Luxembourg
| | - Bruno Domon
- Luxembourg Clinical Proteomics Center, Luxembourg Institute of Health, Strassen, Luxembourg
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Padalia R, Verma R, Chauhan A, Goswami P. Quality evaluation of elite mint cultivars in two cropping seasons in subtropical conditions of Uttarakhand, India. Journal of Essential Oil Research 2014. [DOI: 10.1080/10412905.2014.962190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Agarwal M, Nitta R, Dovat S, Li G, Arita H, Narita Y, Fukushima S, Tateishi K, Matsushita Y, Yoshida A, Miyakita Y, Ohno M, Collins VP, Kawahara N, Shibui S, Ichimura K, Kahn SA, Gholamin S, Junier MP, Chneiweiss H, Weissman I, Mitra S, Cheshier S, Avril T, Hamlat A, Le Reste PJ, Mosser J, Quillien V, Carrato C, Munoz-Marmol A, Serrano L, Pijuan L, Hostalot C, Villa SL, Ariza A, Etxaniz O, Balana C, Benveniste ET, Zheng Y, McFarland B, Drygin D, Bellis S, Bredel M, Lotsch D, Engelmaier C, Allerstorfer S, Grusch M, Pichler J, Weis S, Hainfellner J, Marosi C, Spiegl-Kreinecker S, Berger W, Bronisz A, Nowicki MO, Wang Y, Ansari K, Chiocca EA, Godlewski J, Brown K, Kwatra M, Brown K, Kwatra M, Bui T, Nitta R, Li G, Zhu S, Kozono D, Li J, Kushwaha D, Carter B, Chen C, Schulte J, Srikanth M, Das S, Zhang J, Lathia J, Yin L, Rich J, Olson E, Kessler J, Chenn A, Cherry A, Haas B, Lin YH, Ong SE, Stella N, Cifarelli CP, Griffin RJ, Cong D, Zhu W, Shi Y, Clark P, Kuo J, Hu S, Sun D, Bookland M, Darbinian N, Dey A, Robitaille M, Remke M, Faury D, Maier C, Malhotra A, Jabado N, Taylor M, Angers S, Kenney A, Ren X, Zhou H, Schur M, Baweja A, Singh M, Erdreich-Epstein A, Fu J, Koul D, Yao J, Saito N, Zheng S, Verhaak R, Lu Z, Yung WKA, Gomez G, Volinia S, Croce C, Brennan C, Cavenee W, Furnari F, Lopez SG, Qu D, Petritsch C, Gonzalez-Huarriz M, Aldave G, Ravi D, Rubio A, Diez-Valle R, Marigil M, Jauregi P, Vera B, Rocha AADL, Tejada-Solis S, Alonso MM, Gopal U, Isaacs J, Gruber-Olipitz M, Dabral S, Ramkissoon S, Kung A, Pak E, Chung J, Theisen M, Sun Y, Monrose V, Franchetti Y, Sun Y, Shulman D, Redjal N, Tabak B, Beroukhim R, Zhao J, Buonamici S, Ligon K, Kelleher J, Segal R, Haas B, Canton D, Diaz P, Scott J, Stella N, Hara K, Kageji T, Mizobuchi Y, Kitazato K, Okazaki T, Fujihara T, Nakajima K, Mure H, Kuwayama K, Hara T, Nagahiro S, Hill L, Botfield H, Hossain-Ibrahim K, Logan A, Cruickshank G, Liu Y, Gilbert M, Kyprianou N, Rangnekar V, Horbinski C, Hu Y, Vo C, Li Z, Ke C, Ru N, Hess KR, Linskey ME, Zhou YAH, Hu F, Vinnakota K, Wolf S, Kettenmann H, Jackson PJ, Larson JD, Beckmann DA, Moriarity BS, Largaespada DA, Jalali S, Agnihotri S, Singh S, Burrell K, Croul S, Zadeh G, Kang SH, Yu MO, Song NH, Park KJ, Chi SG, Chung YG, Kim SK, Kim JW, Kim JY, Kim JE, Choi SH, Kim TM, Lee SH, Kim SK, Park SH, Kim IH, Park CK, Jung HW, Koldobskiy M, Ahmed I, Ho G, Snowman A, Raabe E, Eberhart C, Snyder S, Agnihotri S, Gugel I, Remke M, Bornemann A, Pantazis G, Mack S, Shih D, Sabha N, Taylor M, Tatagiba M, Zadeh G, Krischek B, Schulte A, Liffers K, Kathagen A, Riethdorf S, Westphal M, Lamszus K, Lee JS, Xiao J, Patel P, Schade J, Wang J, Deneen B, Erdreich-Epstein A, Song HR, Leiss L, Gjerde C, Saed H, Rahman A, Lellahi M, Enger PO, Leung R, Gil O, Lei L, Canoll P, Sun S, Lee D, Ho ASW, Pu JKS, Zhang XQ, Lee NP, Dat PJR, Leung GKK, Loetsch D, Steiner E, Holzmann K, Spiegl-Kreinecker S, Pirker C, Hlavaty J, Petznek H, Hegedus B, Garay T, Mohr T, Sommergruber W, Grusch M, Berger W, Lukiw WJ, Jones BM, Zhao Y, Bhattacharjee S, Culicchia F, Magnus N, Garnier D, Meehan B, McGraw S, Hashemi M, Lee TH, Milsom C, Gerges N, Jabado N, Trasler J, Pawlinski R, Mackman N, Rak J, Maherally Z, Thorne A, An Q, Barbu E, Fillmore H, Pilkington G, Maherally Z, Tan SL, Tan S, An Q, Fillmore H, Pilkington G, Malhotra A, Choi S, Potts C, Ford DA, Nahle Z, Kenney AM, Matlaf L, Khan S, Zider A, Singer E, Cobbs C, Soroceanu L, McFarland BC, Hong SW, Rajbhandari R, Twitty GB, Gray GK, Yu H, Benveniste EN, Nozell SE, Minata M, Kim S, Mao P, Kaushal J, Nakano I, Mizowaki T, Sasayama T, Tanaka K, Mizukawa K, Nishihara M, Nakamizo S, Tanaka H, Kohta M, Hosoda K, Kohmura E, Moeckel S, Meyer K, Leukel P, Bogdahn U, Riehmenschneider MJ, Bosserhoff AK, Spang R, Hau P, Mukasa A, Watanabe A, Ogiwara H, Saito N, Aburatani H, Mukherjee J, Obha S, See W, Pieper R, Nakajima K, Hara K, Kageji T, Mizobuchi Y, Kitazato K, Fujihara T, Otsuka R, Kung D, Nagahiro S, Rajbhandari R, Sinha T, Meares G, Benveniste EN, Nozell S, Ott M, Litzenburger U, Rauschenbach K, Bunse L, Pusch S, Ochs K, Sahm F, Opitz C, von Deimling A, Wick W, Platten M, Peruzzi P, Chiocca EA, Godlewski J, Read R, Fenton T, Gomez G, Wykosky J, Vandenberg S, Babic I, Iwanami A, Yang H, Cavenee W, Mischel P, Furnari F, Thomas J, Ronellenfitsch MW, Thiepold AL, Harter PN, Mittelbronn M, Steinbach JP, Rybakova Y, Kalen A, Sarsour E, Goswami P, Silber J, Harinath G, Aldaz B, Fabius AWM, Turcan S, Chan TA, Huse JT, Sonabend AM, Bansal M, Guarnieri P, Lei L, Soderquist C, Leung R, Yun J, Kennedy B, Sisti J, Bruce S, Bruce R, Shakya R, Ludwig T, Rosenfeld S, Sims PA, Bruce JN, Califano A, Canoll P, Stockhausen MT, Kristoffersen K, Olsen LS, Poulsen HS, Stringer B, Day B, Barry G, Piper M, Jamieson P, Ensbey K, Bruce Z, Richards L, Boyd A, Sufit A, Burleson T, Le JP, Keating AK, Sundstrom T, Varughese JK, Harter P, Prestegarden L, Petersen K, Azuaje F, Tepper C, Ingham E, Even L, Johnson S, Skaftnesmo KO, Lund-Johansen M, Bjerkvig R, Ferrara K, Thorsen F, Takeshima H, Yamashita S, Yokogami K, Mizuguchi S, Nakamura H, Kuratsu J, Fukushima T, Morishita K, Tanaka H, Sasayama T, Tanaka K, Nakamizo S, Mizukawa K, Kohmura E, Tang Y, Vaka D, Chen S, Ponnuswami A, Cho YJ, Monje M, Tateishi K, Narita Y, Nakamura T, Cahill D, Kawahara N, Ichimura K, Tiemann K, Hedman H, Niclou SP, Timmer M, Tjiong R, Rohn G, Goldbrunner R, Timmer M, Tjiong R, Stavrinou P, Rohn G, Perrech M, Goldbrunner R, Tokita M, Mikheev S, Sellers D, Mikheev A, Kosai Y, Rostomily R, Tritschler I, Seystahl K, Schroeder JJ, Weller M, Wade A, Robinson AE, Phillips JJ, Gong Y, Ma Y, Cheng Z, Thompson R, Wang J, Fan QW, Cheng C, Gustafson W, Charron E, Zipper P, Wong R, Chen J, Lau J, Knobbe-Thosen C, Weller M, Jura N, Reifenberger G, Shokat K, Weiss W, Wu S, Fu J, Zheng S, Koul D, Yung WKA, Wykosky J, Hu J, Taylor T, Villa GR, Gomez G, Mischel PS, Gonias SL, Cavenee W, Furnari F, Yamashita D, Kondo T, Takahashi H, Inoue A, Kohno S, Harada H, Ohue S, Ohnishi T, Li P, Ng J, Yuelling L, Du F, Curran T, Yang ZJ, Zhu D, Castellino RC, Van Meir EG, Zhu W, Begum G, Wang Q, Clark P, Yang SS, Lin SH, Kahle K, Kuo J, Sun D. CELL BIOLOGY AND SIGNALING. Neuro Oncol 2013. [DOI: 10.1093/neuonc/not174] [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: 11/14/2022] Open
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Borkataki S, Katoch R, Goswami P, Godara R, Khajuria JK, Yadav A, Kour R, Mir I. Incidence of Haemoproteus columbae in pigeons of Jammu district. J Parasit Dis 2013; 39:426-8. [PMID: 26345046 DOI: 10.1007/s12639-013-0356-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Accepted: 07/06/2013] [Indexed: 11/30/2022] Open
Abstract
Haemoproteus columbae is the major protozoan infection reported in pigeon and appeared in the erythrocyte of the peripheral circulation. Incidence and parasitaemia of H. columbae in pigeon was studied in different localities of Jammu, India for a period from April to September 2010 using thin blood smear examination. Of the 150 pigeons (wild: 70, domestic: 80), 92 (61.33 %) were found to be infected with H. columbae. Domestic pigeon showed higher incidence rate (74.28 %) than the wild (50 %). Mature and immature gametocyte encircled the erythrocyte nucleus to form a halter shaped appearance were characteristic feature of the parasite. Pseudolynchia canariensis, the vector for H. columbae was also recovered from beneath the feathers of pigeons. No other haemoprotozoan parasite was observed in the blood smear of examined pigeon. Counting of infected erythrocyte revealed higher affection of 1-2 erythrocytes indicative of milder infection in the birds. A long term study within bird population is essential in order to disclose seasonal variation in parasite, vector density and age of infection such as nesting area.
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Affiliation(s)
- S Borkataki
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology, R.S. Pura, 181 102 Jammu, India
| | - R Katoch
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology, R.S. Pura, 181 102 Jammu, India
| | - P Goswami
- Division of Veterinary Pathology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology-K, Suhama, Srinagar, India
| | - R Godara
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology, R.S. Pura, 181 102 Jammu, India
| | - J K Khajuria
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology, R.S. Pura, 181 102 Jammu, India
| | - Anish Yadav
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology, R.S. Pura, 181 102 Jammu, India
| | - R Kour
- Division of Veterinary Parasitology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology, R.S. Pura, 181 102 Jammu, India
| | - Irfan Mir
- Department of Microbiology, College of Veterinary and Animal Sciences, RAJUVAS, Bikaner, India
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Yadav D, Chakrapani V, Goswami P, Ramanathan S, Ramakrishnan L, George B, Sen S, Paranjape R. P4.041 Factors Associated with Frequent Alcohol Drinking Among Men Who Have Sex with Men: Findings from a Multi-Site Bio-Behavioural Survey in India. Br J Vener Dis 2013. [DOI: 10.1136/sextrans-2013-051184.0939] [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: 11/04/2022]
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Ramanathan S, Ramakrishnan L, Goswami P, Yadav D, George B, Sen S, Chakrapani V, Paranjape R, Subramanian T, Rachakulla H. O23.2 Correlates of Inconsistent Condom Use During Anal Sex with Female Sex Workers (FSWs) Among Male Clients: Survey Findings from Three High Prevalence States of India. Br J Vener Dis 2013. [DOI: 10.1136/sextrans-2013-051184.0217] [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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Ramanathan S, Chakrapani V, Ramakrishnan L, Goswami P, Yadav D, George B, Sen S, Paranjape R, Subramanian T, Rachakulla H. P6.027 Factors Associated with Use of Water-Based Lubricants by Men Who Have Sex with Men: Findings from a Bio-Behavioural Study in Three Indian States. Br J Vener Dis 2013. [DOI: 10.1136/sextrans-2013-051184.1181] [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: 11/04/2022]
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Yadav D, Ramanathan S, Goswami P, Ramakrishnan L, Sen S, George B, Paranjape R, Subramanian T, Rachakulla H. P6.016 Factors Associated with Frequent Alcohol Use Among Female Sex Workers in Three High Prevalence States of India: Findings from a Bio-Behavioural Survey. Br J Vener Dis 2013. [DOI: 10.1136/sextrans-2013-051184.1170] [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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Buatti J, Menda Y, Ponto L, Anderson C, Watkins L, Sun W, Smith B, Funk G, Goswami P, Graham M. Early Evaluation of Response to Chemoradiation in Head-and-Neck Squamous Cell Cancer (HNSCC) With F-18 Fluorothymidine Positron Emission Tomography (FLT PET). Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1394] [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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Borkataki S, Islam S, Borkakati M, Goswami P, Deka D. Prevalence of porcine cysticercosis in Nagaon, Morigaon and Karbianglong district of Assam, India. Vet World 2012. [DOI: 10.5455/vetworld.2012.86-90] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Gautam A, Adhikary R, Ramanathan S, Goswami P, Khobragade S, Deshpande SM, Khazi S, Mainkar MM, Paranjape RS. P1-S2.09 Who is at higher risk of STIS and HIV--brothel-based or street-based female sex workers? Evidence from two rounds of bio-behavioural surveys. Br J Vener Dis 2011. [DOI: 10.1136/sextrans-2011-050108.66] [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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Adhikary R, Ramanathan S, Gautam A, Goswami P, Ramakrishnan L, Kallam S, Mainkar MM, Brahmam GNV, Subramanaian T, Paranjape RS. O1-S08.05 Recent trends in STIs and HIV among female sex workers and their clients in India: results from repeated cross-sectional surveys. Br J Vener Dis 2011. [DOI: 10.1136/sextrans-2011-050109.47] [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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Ikeda F, Deribe YL, Skånland SS, Stieglitz B, Grabbe C, Franz-Wachtel M, van Wijk SJL, Goswami P, Nagy V, Terzic J, Tokunaga F, Androulidaki A, Nakagawa T, Pasparakis M, Iwai K, Sundberg JP, Schaefer L, Rittinger K, Macek B, Dikic I. SHARPIN forms a linear ubiquitin ligase complex regulating NF-κB activity and apoptosis. Nature 2011; 471:637-41. [PMID: 21455181 PMCID: PMC3085511 DOI: 10.1038/nature09814] [Citation(s) in RCA: 583] [Impact Index Per Article: 44.8] [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] [Received: 04/06/2010] [Accepted: 01/11/2011] [Indexed: 12/14/2022]
Abstract
SHARPIN is a ubiquitin-binding and ubiquitin-like-domain-containing protein which, when mutated in mice, results in immune system disorders and multi-organ inflammation. Here we report that SHARPIN functions as a novel component of the linear ubiquitin chain assembly complex (LUBAC) and that the absence of SHARPIN causes dysregulation of NF-κB and apoptotic signalling pathways, explaining the severe phenotypes displayed by chronic proliferative dermatitis (cpdm) in SHARPIN-deficient mice. Upon binding to the LUBAC subunit HOIP (also known as RNF31), SHARPIN stimulates the formation of linear ubiquitin chains in vitro and in vivo. Coexpression of SHARPIN and HOIP promotes linear ubiquitination of NEMO (also known as IKBKG), an adaptor of the IκB kinases (IKKs) and subsequent activation of NF-κB signalling, whereas SHARPIN deficiency in mice causes an impaired activation of the IKK complex and NF-κB in B cells, macrophages and mouse embryonic fibroblasts (MEFs). This effect is further enhanced upon concurrent downregulation of HOIL-1L (also known as RBCK1), another HOIP-binding component of LUBAC. In addition, SHARPIN deficiency leads to rapid cell death upon tumour-necrosis factor α (TNF-α) stimulation via FADD- and caspase-8-dependent pathways. SHARPIN thus activates NF-κB and inhibits apoptosis via distinct pathways in vivo.
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Affiliation(s)
- Fumiyo Ikeda
- Frankfurt Institute for Molecular Life Sciences and Institute of Biochemistry II, Goethe University School of Medicine, Theodor-Stern-Kai 7, D-60590 Frankfurt, Main, Germany
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Thill PG, Goswami P, Berchem G, Domon B. Lung cancer statistics in Luxembourg from 1981 to 2008. Bull Soc Sci Med Grand Duche Luxemb 2011:43-55. [PMID: 22272445] [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: 05/31/2023]
Abstract
Lung cancer is the leading cause of cancer-related death in the world and in Luxembourg. As a part of "The health science initiative focused on personalized medicine", Luxembourg aims to participate by developing diagnostics to improve the detection and treatment of lung cancer. In line with this objective, this study made a review of evolution of lung cancer in Luxembourg from 1981 to 2008 and compared this statistics to the situation in the Nordic countries, Europe in general and the World. Incidence data of the national morphological tumour registry and mortality data of the service of statistics of the national ministry of health is depicted in charts with trend lines, in the framework of a statistical evaluation of relevant parameters. The data indicate that while male lung cancer incidence decreased in Luxembourg, the incidence in women and its mortality have doubled over the 28-year span considered. Notwithstanding this increase, the female lung cancer incidence and mortality remain low compared to the Nordic countries and Europe. Interestingly, the study also potentially suggests that the lung cancer pattern follows the smoking pattern in incidence and mortality.
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Affiliation(s)
- P G Thill
- Centre de Recherche Public-Santé, L-1526 Luxembourg.
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Goswami P, Paulino C, Hizlan D, Vonck J, Yildiz O, Kühlbrandt W. Structure of the archaeal Na+/H+ antiporter NhaP1 and functional role of transmembrane helix 1. EMBO J 2010; 30:439-49. [PMID: 21151096 DOI: 10.1038/emboj.2010.321] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Accepted: 11/10/2010] [Indexed: 11/09/2022] Open
Abstract
We have determined the structure of the archaeal sodium/proton antiporter NhaP1 at 7 Å resolution by electron crystallography of 2D crystals. NhaP1 is a dimer in the membrane, with 13 membrane-spanning α-helices per protomer, whereas the distantly related bacterial NhaA has 12. Dimer contacts in the two antiporters are very different, but the structure of a six-helix bundle at the tip of the protomer is conserved. The six-helix bundle of NhaA contains two partially unwound α-helices thought to harbour the ion-translocation site, which is thus similar in NhaP1. A model of NhaP1 based on detailed sequence comparison and the NhaA structure was fitted to the 7 Å map. The additional N-terminal helix 1 of NhaP1, which appears to be an uncleaved signal sequence, is located near the dimer interface. Similar sequences are present in many eukaryotic homologues of NhaP1, including NHE1. Although fully folded and able to dimerize, NhaP1 constructs without helix 1 are inactive. Possible reasons are investigated and discussed.
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Affiliation(s)
- Panchali Goswami
- Department of Structural Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany
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Oinam AS, Singh L, Goswami P, Sharma SC, Ghoshal S, Kapoor R. SU-FF-T-201: Dosimetric Verification of Dynamic IMRT Plans Using I'mRT MatriXX. Med Phys 2009. [DOI: 10.1118/1.3181676] [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: 11/07/2022] Open
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Makharia GK, Seith A, Sharma SK, Sinha A, Goswami P, Aggarwal A, Puri K, Sreenivas V. Structural and functional abnormalities in lungs in patients with achalasia. Neurogastroenterol Motil 2009; 21:603-8, e20. [PMID: 19222759 DOI: 10.1111/j.1365-2982.2009.01268.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [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: 12/28/2022]
Abstract
Dilatation and oesophageal body aperistalsis in achalasia can lead to stasis which in turn can induce repeated microaspiration. It is therefore conceivable that patients with achalasia may also have abnormalities in lungs secondary to repeated episodes of microaspiration. There is a lack of systematic study on involvement of lungs in patients with achalasia. Thirty patients with achalasia underwent pulmonary function tests (spirometry, and carbon mono-oxide diffusion capacity) and high resolution computerized tomography (HRCT) of the chest. The mean age of patients and mean duration of disease were 33.5 +/- 10.9 years and 28.1 +/- 27.3 months respectively. Regurgitation was present in 22 (73.3%) of them. Respiratory symptoms in them were dry cough in 17 (56.6%), and chest pain in 18 (60%). The oesophagus was dilated in 26 (86.6%) and 13 (43.3%) had residue in oesophagus. Sixteen (53.3%) patients had either anatomical changes as seen on HRCT or functional changes as observed on pulmonary function tests. Of those with functional abnormalities, five (16.6%) and one (3.3%) had restrictive and obstructive airways disease respectively. While evidence of tracheo-bronchial compression by dilated oesophagus was present in eight (26.6%), 10 (33.3%) patients had parenchymal lung disease [nodular opacities in five (16.6%), ground glass appearance six (20%), patchy pulmonary fibrosis five (16.6%), air trapping two (6.6%), consolidation and bronchiectasis one (3.3%) each]. There was a significant association between presence of regurgitation and dilatation of oesophagus (P = 0.032). More than half (53.3%) of patients with achalasia have structural and/or functional abnormalities in lungs.
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Affiliation(s)
- G K Makharia
- Department of Gastroenterology and Human Nutrition, All India Institute of Medical Sciences, New Delhi, India.
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Medhi N, Goswami P, Sarma P, Barkataky RK, Duarah R, Saikia R. Klebsiella meningitis. A case report. Neuroradiol J 2008; 21:323-6. [PMID: 24256900 DOI: 10.1177/197140090802100305] [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] [Received: 04/08/2008] [Accepted: 04/09/2008] [Indexed: 11/16/2022] Open
Abstract
Acute bacterial meningitis is a severe CNS infection occurring mostly in infants and older children. Bacterial meningitis caused by gram-negative bacteria is usually fatal. Klebsiella pneumoniae is an uncommon gram-negative bacteria causing meningitis with a poor outcome. Though the commonest presentation of bacterial meningitis is fever, patients usually seek medical attention for uncontrolled seizure and features of raised ICP. The commonest complications of gram-negative bacterial meningitis including Klebsiella meningitis are subdural hygroma / empyema, hydrocephalus, infarcts (both arterial and venous) and cortical blindness due to hypoxic ischaemic insult. MRI is the best modality for evaluating these patients for early diagnosis. Early institution of treatment significantly reduces the mortality and morbidity. We describe a case of acute bacterial meningitis caused by Klebsiella pneumoniae with MR evidence of sinus thrombosis, venous infarcts and subdural hygroma.
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Affiliation(s)
- N Medhi
- Radiology Department, Primus, Guwahati; Assam; India -
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Bhardwaj A, Sharma SC, Patel FD, Ghoshal S, Oinam AS, Kapoor R, Kumar R, Goswami P. SU-GG-T-154: Use of I'mRT MatriXX for Routine Dynamic MLC QA and IMRT Dose Verification. Med Phys 2008. [DOI: 10.1118/1.2961905] [Citation(s) in RCA: 3] [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: 11/07/2022] Open
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Goswami P, Medhi N, Sarma PK, Khaund G. Chronic Tuberculous Retropharyngeal Abscess Due to Vertebral Tuberculosis with Associated Calvarial Tuberculosis. Neuroradiol J 2008; 21:270-4. [DOI: 10.1177/197140090802100221] [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] [Received: 01/25/2008] [Accepted: 01/26/2008] [Indexed: 11/17/2022] Open
Abstract
The occurrence of chronic tuberculous retropharyngeal abscess and calvarial tuberculosis is rare, even in isolated form. Chronic tuberculous retropharyngeal abscess is usually due to vertebral tuberculosis in adults. Calvarial tuberculosis is a rare manifestation of extra-pulmonary tuberculosis with limited reports in medical literature. We describe a rare case of chronic tuberculous retropharyngeal abscess due to vertebral tuberculosis with associated calvarial tuberculosis.
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Affiliation(s)
- P. Goswami
- Radiology and Imaging Department, Primus Imaging Pvt. Ltd; Guwahati, India
| | - N. Medhi
- Radiology and Imaging Department, Primus Imaging Pvt. Ltd; Guwahati, India
| | - P. K. Sarma
- Radiology and Imaging Department, Primus Imaging Pvt. Ltd; Guwahati, India
| | - G. Khaund
- Radiology and Imaging Department, Primus Imaging Pvt. Ltd; Guwahati, India
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Edwards CJ, Syddall H, Goswami R, Goswami P, Dennison EM, Arden NK, Cooper C. The autoantibody rheumatoid factor may be an independent risk factor for ischaemic heart disease in men. Heart 2007; 93:1263-7. [PMID: 17550930 PMCID: PMC2000921 DOI: 10.1136/hrt.2006.097816] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Subjects with rheumatoid arthritis have an increased prevalence of ischaemic heart disease (IHD). This is most likely in those people with the autoantibody rheumatoid factor (RF). RF is strongly associated with rheumatoid arthritis (RA) but is also present in up to 15% of all adults. OBJECTIVE To determine whether RF might identify people in a general population who also share an increased likelihood of developing IHD. METHODS Subjects from the Hertfordshire Cohort Study were investigated for the presence of RF. Subjects completed a questionnaire and attended a clinic where a history of IHD was recorded (ECG, coronary artery bypass grafting, Rose chest pain). Associations between the presence of RF, antinuclear antibodies (ANA), anticardiolipin antibodies (ACA) and IHD in 567 men and 589 women were investigated and compared with traditional risk factors for IHD. RESULTS RF was associated with an increased likelihood of IHD in men (odds ratio (OR) = 3.1, 95% CI 1.7 to 5.4, p<0.001). This increased risk could not be explained by traditional risk factors for IHD (mutually adjusted OR for RF 2.9 (95% CI 1.6 to 5.3), p<0.001). There was no significant association between RF in women or between ANA or ACA with IHD in men or women. CONCLUSION This work suggests that RF is an independent risk factor for IHD in the general population. It lends support to the importance of inflammation in atherosclerosis and suggests that autoimmune processes may be involved. In addition, it raises the intriguing possibility that RF may have a direct role in the pathogenesis of IHD in some subjects.
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Affiliation(s)
- C J Edwards
- MRC Epidemiology Resource Centre, University of Southampton, Southampton, UK.
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Kedrov A, Wegmann S, Smits SHJ, Goswami P, Baumann H, Muller DJ. Detecting molecular interactions that stabilize, activate and guide ligand-binding of the sodium/proton antiporter MjNhaP1 from Methanococcus jannaschii. J Struct Biol 2007; 159:290-301. [PMID: 17428680 DOI: 10.1016/j.jsb.2007.02.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Revised: 02/22/2007] [Accepted: 02/22/2007] [Indexed: 11/24/2022]
Abstract
Integral membrane proteins are involved in virtually every cellular process. Precisely regulating these machineries would allow controlling many human and vertebrate diseases. Embedded into cellular membranes, membrane proteins establish molecular interactions that sensitively react to environmental changes and to molecular compounds, such as ligands or inhibitors. We applied atomic force microscopy (AFM) to image the Na(+)/H(+) antiporter MjNhaP1 from Methanococcus jannaschii, and single-molecule force spectroscopy (SMFS) to probe molecular interactions that drive the protein structure-function relationship. High-resolution AFM topographs showed the dimeric assembly of MjNhaP1 being reconstituted into a lipid bilayer. SMFS of MjNhaP1 unraveled molecular interactions stabilizing individual structural domains. Transmembrane domains exhibited certain probabilities to unfold individually or cooperatively with other domains resulting in different unfolding pathways. Helices VIII and X established pH sensitive interactions altering significantly upon MjNhaP1 activation, while removal of the ligand (Na(+)) destabilized the entire antiporter except helix VIII. It is assumed that Asp234/235 of helix VIII are involved in the ligand-binding site and that helix X plays a functional role in the activation of the transporter.
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Affiliation(s)
- Alexej Kedrov
- Center of Biotechnology, TU Dresden, Dresden, Germany
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Roy MK, Das S, Bhattacharya S, Ghoshal DP, Goswami P. Pyomyositis: a diagnostic problem. J Indian Med Assoc 2007; 105:53-5. [PMID: 17802980] [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: 05/17/2023]
Abstract
A case of a 45-year-old lady presenting with symptoms suggestive of pancreatitis is described. Initially the findings on Imaging were ambiguous while the enzyme studies were against the diagnosis of pancreatitis. Recurrence of symptoms and with Increased intensity prompted repeated imaging and further investigations. Finally, by a combination of CT scan, MR imaging and muscle biopsy the rare diagnosis of pyomyositis was established. The fact that this case was difficult to diagnose because of its rarity and its mimicking pencreatitis is discussed.
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Affiliation(s)
- M K Roy
- RG Kar Medical College & Hospital, Kolkata 700004
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Yildiz Ö, Vinothkumar KR, Goswami P, Kühlbrandt W. Structure of the monomeric outer-membrane porin OmpG in the open and closed conformation. EMBO J 2006. [DOI: 10.1038/sj.emboj.7601371] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Yildiz Ö, Vinothkumar KR, Goswami P, Kühlbrandt W. Structure of the monomeric outer-membrane porin OmpG in the open and closed conformation. EMBO J 2006; 25:3702-13. [PMID: 16888630 PMCID: PMC1538548 DOI: 10.1038/sj.emboj.7601237] [Citation(s) in RCA: 136] [Impact Index Per Article: 7.6] [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: 04/28/2006] [Accepted: 06/14/2006] [Indexed: 11/09/2022] Open
Abstract
OmpG, a monomeric pore-forming protein from Escherichia coli outer membranes, was refolded from inclusion bodies and crystallized in two different conformations. The OmpG channel is a 14-stranded beta-barrel, with short periplasmic turns and seven extracellular loops. Crystals grown at neutral pH show the channel in the open state at 2.3 A resolution. In the 2.7 A structure of crystals grown at pH 5.6, the pore is blocked by loop 6, which folds across the channel. The rearrangement of loop 6 appears to be triggered by a pair of histidine residues, which repel one another at acidic pH, resulting in the breakage of neighbouring H-bonds and a lengthening of loop 6 from 10 to 17 residues. A total of 151 ordered LDAO detergent molecules were found in the 2.3 A structure, mostly on the hydrophobic outer surface of OmpG, mimicking the outer membrane lipid bilayer, with three LDAO molecules in the open pore. In the 2.7 A structure, OmpG binds one OG and one glucose molecule as sugar substrates in the closed pore.
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Affiliation(s)
- Özkan Yildiz
- Department of Structural Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany
| | - Kutti R Vinothkumar
- Department of Structural Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany
| | - Panchali Goswami
- Department of Structural Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany
| | - Werner Kühlbrandt
- Department of Structural Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany
- Department of Structural Biology, Max Planck Institute of Biophysics, Max-von-Laue-Str. 3, Frankfurt am Main 60438, Germany. Tel.: +49 69 6303 3000; Fax: +49 69 6303 3002; E-mail:
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Goswami P, Medhi N, Sarma PK, Sarmah BJ. MRI findings in marchiafava - bignami disease with central pontine myelinolysis : A case report. Indian J Radiol Imaging 2006. [DOI: 10.4103/0971-3026.32346] [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] Open
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Edwards CJ, Goswami R, Goswami P, Syddall H, Dennison EM, Arden NK, Cooper C. Growth and infectious exposure during infancy and the risk of rheumatoid factor in adult life. Ann Rheum Dis 2005; 65:401-4. [PMID: 16079171 PMCID: PMC1798049 DOI: 10.1136/ard.2005.036301] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND The contribution of the environment to rheumatoid arthritis (RA) remains uncertain. Intrauterine and early postnatal life may be important. Rheumatoid factor (RF) found in around 10% of the normal population confers a risk of developing RA and may be present years before onset of clinical disease. The immune pathology leading to RA and RF may have similar genetic and environmental influences. OBJECTIVE To measure RF in people for whom data on birth weight, infant growth, and markers of infectious exposure during infancy and childhood, had been previously recorded. METHODS 675 men and 668 women aged 59-67 years, born and still resident in Hertfordshire, UK, were studied. RF was measured with an ELISA. Associations between presence of RF, early growth, and markers of hygiene in infancy, were investigated. RESULTS RF was detected in 112/675 (16.6%) men and 79/668 (11.8%) women. No significant relationships existed between early growth and presence of RF in men or women. Among women, sharing a bedroom during childhood was associated with a lower risk of RF positivity (OR = 0.48, 95% CI 0.30 to 0.78, p = 0.003). CONCLUSIONS A developing immune system exposed to increased infectious exposure is less likely to produce RF in adult life; this may reduce the pathological process which leads to RA.
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Affiliation(s)
- C J Edwards
- Department of Rheumatology, Southampton General Hospital, Tremona Road, Southampton SO16 6YD, UK.
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Goswami P, Medhi N, Sarma PK, Das HS, Hazarika P. Imaging features of osteoid osteoma in plain radiograph, CT and MR : A case report and review of literatures. Indian J Radiol Imaging 2005. [DOI: 10.4103/0971-3026.28779] [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] Open
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Trask D, Bock J, Goswami P, Menon S. Celecoxib and sulindac sulfide enhance the cytotoxic effect of standard chemotherapeutic agents and possess anti-tumor activity mediated by p21 cipl/waf1 expression. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.3186] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- D. Trask
- University of Iowa, Iowa City, IA
| | - J. Bock
- University of Iowa, Iowa City, IA
| | | | - S. Menon
- University of Iowa, Iowa City, IA
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Bhattacharya S, Roy CK, Das S, Goswami P, Mondal J, Ghosal DP. A case of disseminated hydatidosis. J Indian Med Assoc 2003; 101:672-4. [PMID: 15198419] [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: 04/29/2023]
Abstract
A young lady initially found to have hydatid cysts in the lung only, subsequently within a very short period was found to develop cysts in the liver. Soon after, she developed cysts in the subcutaneous tissue over the anterolateral chest wall, which, on investigation, revealed hepatic cysts herniating through the chest wall defects caused by previous operations. The unique features of this case include the degree of dissemination, the multiplicity of sites and the peculiar nature of herniation of the hepatic cysts into the parietes.
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Affiliation(s)
- S Bhattacharya
- Department of General Surgery, RG Kar Medical College and Hospital, Kolkata
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Gogoi B, Dutta N, Goswami P, Krishna Mohan T. A case study of bioremediation of petroleum-hydrocarbon contaminated soil at a crude oil spill site. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s1093-0191(02)00029-1] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bhattacharjee CR, Dey S, Goswami P. Protective role of ascorbic acid against lead toxicity in blood of albino mice as revealed by metal uptake, lipid profiles, and ultrastructural features of erythrocytes. Bull Environ Contam Toxicol 2003; 70:1189-1196. [PMID: 12756459 DOI: 10.1007/s00128-003-0108-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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