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Ghosh Dastidar A, Cengarle M, Vizzi V, McAlindon E, Augustine D, Jenkins N, Johnson T, Strange J, Baumbach A, Bucciarelli-Ducci C, Nightingale A. 114 ROLE AND COST-EFFECTIVENESS OF NON-INVASIVE IMAGING GUIDED APPROACH IN PATIENTS WITH NON-CULPRIT CORONARY ARTERY LESION DIAGNOSED AT PRIMARY PERCUTANEOUS CORONARY INTERVENTION. BRITISH HEART JOURNAL 2013. [DOI: 10.1136/heartjnl-2013-304019.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Boyle L, Credeur D, Jenkins N, Padilla J, Thyfault J, Fadel P. Five days of reduced physical activity selectively impairs endothelial function of the inactive limbs. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.1136.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Minks DP, Porte M, Jenkins N. Acute mastoiditis--the role of radiology. Clin Radiol 2012; 68:397-405. [PMID: 22980753 DOI: 10.1016/j.crad.2012.07.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 07/21/2012] [Accepted: 07/24/2012] [Indexed: 11/18/2022]
Abstract
Acute mastoiditis is a commonly occurring condition in children and adults, and one that most radiologists will come across at some point during their on-call duties. Acute mastoiditis is usually clinically apparent. However, the complications, especially the intracranial ones, can be more insidious and may have fatal consequences. Therefore, it is imperative that the radiologist is well versed in identifying these. Local spread of infection from the mastoids and middle ear cleft may occur via four routes: bone erosion, thrombophlebitis, periphlebitis, and via the anatomical pathways. The role of radiology is largely to demonstrate the complications of mastoiditis, which can be clinically occult and are often serious; this article will highlight these complications.
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Tay L, Ahmar W, Malaiapan Y, White A, Leung M, Jenkins N, Meredith I. Bifurcation PCI in STEMI is Associated with Adverse 12 Month Clinical Outcomes. Heart Lung Circ 2012. [DOI: 10.1016/j.hlc.2012.05.370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lamotte D, Buckberry L, Monaco L, Soria M, Jenkins N, Engasser JM, Marc A. Na-butyrate increases the production and alpha2,6-sialylation of recombinant interferon-gamma expressed by alpha2,6- sialyltransferase engineered CHO cells. Cytotechnology 2011; 29:55-64. [PMID: 19003337 DOI: 10.1023/a:1008080432681] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
A non-human like glycosylation pattern in human recombinant glycoproteins expressed by animal cells may compromise their use as therapeutic drugs. In order to correct the CHO glycosylation machinery, a CHO cell line producing recombinant human interferon- gamma (IFN) was transformed to replace the endogenous pseudogene with a functional copy of the enzyme alpha2,6-sialyltransferase (alpha2,6-ST). Both the parental and the modified CHO cell line were propagated in serum-free batch culture with or without 1 mM sodium butyrate. Although Na-butyrate inhibited cell growth, IFN concentration was increased twofold. The IFN sialylation status was determined using linkage specific sialidases and HPLC. Under non- induced conditions, IFN expressed by alpha2,6-engineered cells contained 68% of the total sialic acids in the alpha2,6- conformation and the overall molar ratio of sialic acids to IFN was 2.3. Sodium butyrate addition increased twofold the molar ratio of total sialic acids to IFN and 82% of total sialic acids on IFN were in the alpha2,6-conformation. In contrast, no effect of the sodium butyrate was noticed on the sialylation of the IFN secreted by the alpha2,6-ST deficient parental cell line. This study deals for the first time with the effect of Na-butyrate on CHO cells engineered to produce human like sialylation.
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Jenkins N, Hallowell N, Farmer AJ, Holman RR, Lawton J. Participants' experiences of intensifying insulin therapy during the Treating to Target in Type 2 Diabetes (4-T) trial: qualitative interview study. Diabet Med 2011; 28:543-8. [PMID: 21480965 DOI: 10.1111/j.1464-5491.2010.03200.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIM To explore participants' experiences of intensifying insulin therapy during the Treating to Target in Type 2 Diabetes (4-T) trial. METHODS In-depth interviews were conducted with 41 trial participants who had had their insulin therapy intensified during this trial. Data were analysed using an inductive, thematic approach. RESULTS The vast majority of participants were receptive towards intensifying treatment. Whilst some were happy simply to follow health professionals' recommendations, others saw taking two types of insulin as a more effective way of controlling their diabetes. Post-intensification, participants sought to remember to take their additional injections by developing injection-related strategies and daily routines. The need to inject insulin whilst in public often arose more frequently following intensification and was a consistent source of anxiety. Those who were worried about injecting in public sought to avoid having to do so; for example, by injecting in toilets or by advancing or delaying the timing of their injections. CONCLUSIONS IT was not increasing the number of daily injections per se which was problematic for the participants who had agreed to have their insulin therapies intensified, but the increased likelihood of having to inject insulin in public. Addressing concerns about injecting in public places may help promote adherence to intensified insulin regimens.
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Scriven J, Davies S, Banerjee AK, Jenkins N, Watson J. Limbic encephalitis secondary to HIV seroconversion. Int J STD AIDS 2011; 22:236-7. [DOI: 10.1258/ijsa.2011.010331] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We present a case of acute limbic encephalitis secondary to HIV seroconversion. The patient made a gradual neurological recovery following treatment with antiretroviral therapy, steroids and intravenous immunoglobulin.
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Hayter PM, Curling EM, Baines AJ, Jenkins N, Salmon I, Strange PG, Tong JM, Bull AT. Glucose-limited chemostat culture of Chinese hamster ovary cells producing recombinant human interferon-gamma. Biotechnol Bioeng 2010; 39:327-35. [PMID: 18600949 DOI: 10.1002/bit.260390311] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A Chinese hamster ovary (CHO) cell line expressing recombinant human interferon-gamma (IFN-gamma) was grown under glucose limitation in a chemostate at a constant dilution rate of 0.015 h(-1) with glucose feed concentrations of 2.75 mM and 4.25 mM. The changes in cell concentration that accompanied changes in the glucose feed concentration indicated that the cells were glucose-limited. The cell yield on glucose remained constant, but there was a decline in residual glucose concentration and a reduced lactate yield from glucose in the latter stages of the culture. The consumption rates for many of the essential amino acids were increased later in the culture. The volumetric rate of interferon-gamma production was maintained throughout the course of this culture, indicating that IFN-gamma expression was stable under these conditions. However, the specific rate of IFN-gamma production was significantly lower at the higher glucose feed concentration. Under glucose limitation, the proportion of fully glycosylated IFN-gamma produced by these cells was less than that produced in the early stages of batch cultures. The proportion of fully glycosylated IFN-gamma increased during transient periods of glucose excess, suggesting that the culture environment influences the glycosylation of IFN-gamma.
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Jenkins N, Fasano Y, Berthod C, Maggio-Aprile I, Piriou A, Giannini E, Hoogenboom BW, Hess C, Cren T, Fischer Ø. Imaging the essential role of spin fluctuations in high-T(c) superconductivity. PHYSICAL REVIEW LETTERS 2009; 103:227001. [PMID: 20366120 DOI: 10.1103/physrevlett.103.227001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Revised: 09/14/2009] [Indexed: 05/29/2023]
Abstract
We have used scanning tunneling spectroscopy to investigate short-length electronic correlations in three-layer Bi2Sr2Ca2Cu3O(10+delta) (Bi-2223). We show that the superconducting gap and the energy Omega(dip), defined as the difference between the dip minimum and the gap, are both modulated in space following the lattice superstructure and are locally anticorrelated. Based on fits of our data to a microscopic strong-coupling model, we show that Omega(dip) is an accurate measure of the collective-mode energy in Bi-2223. We conclude that the collective mode responsible for the dip is a local excitation with a doping dependent energy and is most likely the (pi, pi) spin resonance.
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Pataky K, Villanueva G, Liani A, Zgheib O, Jenkins N, Halazonetis DJ, Halazonetis TD, Brugger J. Microcollimator for micrometer-wide stripe irradiation of cells using 20-30 keV X rays. Radiat Res 2009; 172:252-9. [PMID: 19630530 DOI: 10.1667/rr1483.1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Abstract Pataky, K., Villanueva, G., Liani, A., Zgheib, O., Jenkins, N., Halazonetis, D. J., Halazonetis, T. D. and Brugger, J. Microcollimator for Micrometer-Wide Stripe Irradiation of Cells Using 20-30 keV X Rays. Radiat. Res. 172, 252-259 (2009). The exposure of subnuclear compartments of cells to ionizing radiation is currently not trivial. We describe here a collimator for micrometer-wide stripe irradiation designed to work with conventional high-voltage X-ray tubes and cells cultured on standard glass cover slips. The microcollimator was fabricated by high-precision silicon micromachining and consists of X-ray absorbing chips with grooves of highly controlled depths, between 0.5-10 microm, along their surfaces. These grooves form X-ray collimating slits when the chips are stacked against each other. The use of this device for radiation biology was examined by irradiating human cells with X rays having energies between 20-30 keV. After irradiation, p53 binding protein 1 (53BP1), a nuclear protein that is recruited at sites of DNA double-strand breaks, clustered in lines corresponding to the irradiated stripes.
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Jenkins N, Potts R, Fleckney M. DESIGN AND USE OF A PENUMBRA EXTRAPOLATION CHAMBER TO DETER MINE THE. Radiother Oncol 2009. [DOI: 10.1016/s0167-8140(12)72723-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Jenkins N, Limpongsanurak S, Fotherby K. Circulating levels of synthetic steroids in women using a ‘triphasic’ formulation: a comparison with different ethinyloestradiol doses. J OBSTET GYNAECOL 2009. [DOI: 10.3109/01443618109067407] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Beadsworth MBJ, Cohen D, Ratcliffe L, Jenkins N, Taylor W, Campbell F, Beeching NJ, Azadeh B. Autopsies in HIV: still identifying missed diagnoses. Int J STD AIDS 2009; 20:84-6. [DOI: 10.1258/ijsa.2008.008271] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This study reviews the deaths and autopsies carried out over 23 years, 1983–2005, in a British Infection Unit in HIV patients. Of 115 HIV patients known to have died, we obtained data on 93%. Of this 80% were male, median age 38 (25–68) years; 83% were Caucasian; 12% Black African. Major risk factors were men who have sex with men, 52%; heterosexual in Africa, 17%; and injecting drug use, 8%. The commonest diagnosis pre- and post-autopsy diagnosis was pneumonia. Changes in diagnoses in the 38% who underwent autopsy were high (we requested autopsy in 50%). Primary diagnosis changed in 70%, and 36% of all opportunistic infections were missed. This included six of nine cytomegalovirus, all tuberculosis and 75% of Kaposi's sarcoma. Lymphoma was overdiagnosed. Thus, despite excellent resources, the majority of primary diagnoses were wrong, suggesting inadequacy of current diagnostics. To improve these and improve both epidemiological data and future management autopsy should be considered for all deaths.
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Dubois C, Santi G, Cuttat I, Berthod C, Jenkins N, Petrović AP, Manuel AA, Fischer O, Kazakov SM, Bukowski Z, Karpinski J. Scanning tunneling spectroscopy in the superconducting state and vortex cores of the beta-pyrochlore KOs2O6. PHYSICAL REVIEW LETTERS 2008; 101:057004. [PMID: 18764421 DOI: 10.1103/physrevlett.101.057004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2007] [Indexed: 05/26/2023]
Abstract
We performed the first scanning tunneling spectroscopy measurements on the pyrochlore superconductor KOs2O6 (T(c)=9.6 K) in both zero magnetic field and the vortex state at several temperatures above 1.95 K. This material presents atomically flat surfaces, yielding spatially homogeneous spectra which reveal fully gapped superconductivity with a gap anisotropy of 30%. Measurements performed at fields of 2 and 6 T display a hexagonal Abrikosov flux line lattice. From the shape of the vortex cores, we extract a coherence length of 31-40 A, in agreement with the value derived from the upper critical field H(c2). We observe a reduction in size of the vortex cores (and hence the coherence length) with increasing field which is consistent with the unexpectedly high and unsaturated upper critical field reported.
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Yamben I, Rachel R, Copeland N, Jenkins N, Griep A. The PDZ proteins, Dlg-1 and Scrib, are required for lens fiber cell differentiation in the mouse. Dev Biol 2008. [DOI: 10.1016/j.ydbio.2008.05.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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DeBeer-Schmitt L, Eskildsen MR, Ichioka M, Machida K, Jenkins N, Dewhurst CD, Abrahamsen AB, Bud'ko SL, Canfield PC. Pauli paramagnetic effects on vortices in superconducting TmNi2B2C. PHYSICAL REVIEW LETTERS 2007; 99:167001. [PMID: 17995281 DOI: 10.1103/physrevlett.99.167001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2007] [Indexed: 05/25/2023]
Abstract
The magnetic field distribution around the vortices in TmNi2B2C in the paramagnetic phase was studied experimentally as well as theoretically. The vortex form factor, measured by small-angle neutron scattering, is found to be field independent up to 0.6Hc2 followed by a sharp decrease at higher fields. The data are fitted well by solutions to the Eilenberger equations when paramagnetic effects due to the exchange interaction with the localized 4f Tm moments are included. The induced paramagnetic moments around the vortex cores act to maintain the field contrast probed by the form factor.
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Beadsworth M, Cohen D, Jenkins N, Ratcliffe L, Beeching N. Autopsies in HIV: Still Finding Missed Diagnoses After 20 Years. J Infect 2007. [DOI: 10.1016/j.jinf.2006.10.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Carrol ED, Beadsworth MBJ, Jenkins N, Ratcliffe L, Ashton I, Crowley B, Nye FJ, Beeching NJ. Clinical and diagnostic findings of an echovirus meningitis outbreak in the north west of England. Postgrad Med J 2006; 82:60-4. [PMID: 16397083 PMCID: PMC2563715 DOI: 10.1136/pgmj.2005.036608] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
INTRODUCTION An outbreak of echovirus meningitis occurred in the north west of England in 2001. This paper reviewed the clinical features and the role of different diagnostic methods. METHODS This was a prospective study of adults admitted to a regional infectious disease unit with a probable diagnosis of meningitis, March to August 2001. RESULTS Half the 40 cases were male; median age was 28 (range 16-51) years. Fifteen of 38 (39.5%) were smokers, and 20 of 24 (83.3%) had close contact with children. Median (range) duration of symptoms was 1.1 (0.25-7) days. Symptoms included headache (100%), photophobia (87.5%), and nausea (67.5%), and severity ranged from minimal signs to those consistent with a meningoencephalitis. The diagnosis was confirmed virologically in 29 of 40 (72%); echovirus 30 was isolated from six. Cerebrospinal fluid (CSF) enterovirus polymerase chain reaction (PCR) was positive in 26 of 32 (81%), and CSF virus culture in 3 of 16 (19%). Thirty one per cent of CSF samples had a neutrophil predominance, and 3 of 29 (10%) virologically confirmed cases had normal CSF microscopy and biochemistry. CONCLUSION CSF microscopy may be normal or suggest bacterial meningitis in a substantial minority of cases of echovirus meningitis. CSF PCR for enterovirus seems to be more sensitive than virus culture of CSF, although PCR does not yield information on circulating virus type. Early and accurate diagnosis could reduce both use of parenteral antibiotics and length of hospital stay with both morbidity and cost implications. Close contact with children may be a risk factor, particularly if good hygiene measures are not practised.
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Arulampalam A, Barnes M, Jenkins N, Ekanayake J. Power quality and stability improvement of a wind farm using STATCOM supported with hybrid battery energy storage. ACTA ACUST UNITED AC 2006. [DOI: 10.1049/ip-gtd:20045269] [Citation(s) in RCA: 164] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Anaya-Lara O, Hughes F, Jenkins N, Strbac G. Contribution of DFIG-based wind farms to power system short-term frequency regulation. ACTA ACUST UNITED AC 2006. [DOI: 10.1049/ip-gtd:20050264] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Arzumanov T, Jenkins N, Roussos S. Effect of aeration and substrate moisture content on sporulation of Metarhizium anisopliae var. acridum. Process Biochem 2005. [DOI: 10.1016/j.procbio.2004.03.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Hird C, Leite H, Jenkins N, Li H. Network voltage controller for distributed generation. ACTA ACUST UNITED AC 2004. [DOI: 10.1049/ip-gtd:20040083] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Arulampalam A, Ekanayake J, Jenkins N. Application study of a STATCOM with energy storage. ACTA ACUST UNITED AC 2003. [DOI: 10.1049/ip-gtd:20030232] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Carrol E, Beadsworth M, Jenkins N, Ratcliffe L, Ashton I, Crowley B, Nye F, Beeching N. Adult echovirus 30 meningitis outbreak. J Infect 2002. [DOI: 10.1016/s0163-4453(02)90350-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Labott SM, Sanjabi PB, Jenkins N, Iannuzzi MC. Anger experience and expression in chronic obstructive pulmonary disease. PSYCHOL HEALTH MED 2001. [DOI: 10.1080/13548500120087051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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