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Yang J, Xu T, Tucker S, Williamson R, Liao Z, Court L. SU-E-T-280: CT Texture Analysis of Non-Small Cell Lung Carcinoma Is Not Predictive of SNP Status. Med Phys 2013. [DOI: 10.1118/1.4814714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Williamson R, Court L, Zhang L, Liao Z, Mohan R, Chen Y, Balter P. SU-E-J-197: Tracking Tumor Response Over Treatment Course in IMRT and Proton Patients. Med Phys 2013. [DOI: 10.1118/1.4814409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Seaton T, Khan S, Stewart V, Ralliegh G, Zaman N, Barrett N, Comitis S, Gupta A, Svensson W, Lim A, Williamson R, Cunningham D. PB.32: Does vacuum-assisted biopsy decrease the B3 rate in stereotactic biopsy of breast lesions? Breast Cancer Res 2013; 15. [PMCID: PMC3980755 DOI: 10.1186/bcr3532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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McNeilly AD, Williamson R, Balfour DJK, Stewart CA, Sutherland C. A high-fat-diet-induced cognitive deficit in rats that is not prevented by improving insulin sensitivity with metformin. Diabetologia 2012; 55:3061-70. [PMID: 22898768 DOI: 10.1007/s00125-012-2686-y] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Accepted: 07/13/2012] [Indexed: 12/18/2022]
Abstract
AIMS/HYPOTHESIS We previously demonstrated that animals fed a high-fat (HF) diet for 10 weeks developed insulin resistance and behavioural inflexibility. We hypothesised that intervention with metformin would diminish the HF-feeding-evoked cognitive deficit by improving insulin sensitivity. METHODS Rats were trained in an operant-based matching and non-matching to position task (MTP/NMTP). Animals received an HF (45% of kJ as lard; n = 24), standard chow (SC; n = 16), HF + metformin (144 mg/kg in diet; n = 20) or SC + metformin (144 mg/kg in diet; n = 16) diet for 10 weeks before retesting. Body weight and plasma glucose, insulin and leptin were measured. Protein lysates from various brain areas were analysed for alterations in intracellular signalling or production of synaptic proteins. RESULTS HF-fed animals developed insulin resistance and an impairment in switching task contingency from matching to non-matching paradigm. Metformin attenuated the insulin resistance and weight gain associated with HF feeding, but had no effect on performance in either MTP or NMTP tasks. No major alteration in proteins associated with insulin signalling or synaptic function was detected in response to HF diet in the hypothalamus, hippocampus, striatum or cortex. CONCLUSIONS/INTERPRETATION Metformin prevented the metabolic but not cognitive alterations associated with HF feeding. The HF diet protocol did not change basal insulin signalling in the brain, suggesting that the brain did not develop insulin resistance. These findings indicate that HF diet has deleterious effects on neuronal function over and above those related to insulin resistance and suggest that weight loss may not be sufficient to reverse some damaging effects of poor diet.
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Kakkar A, Hedges R, Williamson R, Kakkar V. Perioperative heparin-therapy inhibits late death from metastatic cancer. Int J Oncol 2012; 6:885-8. [PMID: 21556616 DOI: 10.3892/ijo.6.4.885] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Low-dose heparin prophylaxis reduces postoperative death from fatal pulmonary embolism and its long-term anti-cancer effect has now been assessed in a retrospective study of 1250 patients, 336 of whom (30%) underwent operation for cancer. There was a striking reduction in three year mortality amongst those patients who received low dose heparin compared to unteated controls (7.6% vs. 12.5%, P=0.005). Death from disseminated malignancy was halved (9.2% vs. 21.4%). The mechanism remains unclear, but may reflect either the antithrombotic actions of heparin or a direct antitumour cell effect.
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Leung H, Hughes C, Kloppel G, Williamson R, Lemoine N. Localization of expression of fibroblast growth-factors and their receptors in pancreatic adenocarcinoma by in-situ hybridization. Int J Oncol 2012; 4:1219-23. [PMID: 21567040 DOI: 10.3892/ijo.4.6.1219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Growth factors may play a role in autocrine or paracrine growth control of tumour cells. We have now examined the expression pattern in vivo by in situ hybridization (ISH) on a series of 13 ductal adenocarcinomas of the pancreas using the non-radioactive digoxigenin system to generate specific antisense orientated riboprobes for FGF-1 and FGF-2, and the four FGFRs (FGFR-1, -2, -3 and -4). We confirmed the expression of both FGF/FGFR by tumour cells, with the potential of a potential autocrine loops in 46% of the cases studied. FGF-2 and FGFR-3 were the most commonly expressed ligand and receptor (46% and 76% respectively). Endothelial cells lining vessels within an around invasive tumours were frequently positive for expression of FGFR-1 and/or FGFR-3. In the normal pancreas remote from the tumour, the acinar cells were found to have a heterogeneous expression pattern for FGFRs while duct cells, islet cells and stromal components including nerves and vascular endothelium were negative. The data suggest a role for FGFs and their high affinity receptors in the control of growth of human pancreatic adenocarcinoma and its supporting stroma.
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Williamson R. Scientists complete miRNA profiling of carcinogen-induced and spinach-fed colon tumors. Epigenomics 2012; 4:480. [PMID: 23275981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
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McDonald M, Bayliss M, Benson BA, Foley RJ, Ruel J, Sullivan P, Veilleux S, Aird KA, Ashby MLN, Bautz M, Bazin G, Bleem LE, Brodwin M, Carlstrom JE, Chang CL, Cho HM, Clocchiatti A, Crawford TM, Crites AT, de Haan T, Desai S, Dobbs MA, Dudley JP, Egami E, Forman WR, Garmire GP, George EM, Gladders MD, Gonzalez AH, Halverson NW, Harrington NL, High FW, Holder GP, Holzapfel WL, Hoover S, Hrubes JD, Jones C, Joy M, Keisler R, Knox L, Lee AT, Leitch EM, Liu J, Lueker M, Luong-Van D, Mantz A, Marrone DP, McMahon JJ, Mehl J, Meyer SS, Miller ED, Mocanu L, Mohr JJ, Montroy TE, Murray SS, Natoli T, Padin S, Plagge T, Pryke C, Rawle TD, Reichardt CL, Rest A, Rex M, Ruhl JE, Saliwanchik BR, Saro A, Sayre JT, Schaffer KK, Shaw L, Shirokoff E, Simcoe R, Song J, Spieler HG, Stalder B, Staniszewski Z, Stark AA, Story K, Stubbs CW, Šuhada R, van Engelen A, Vanderlinde K, Vieira JD, Vikhlinin A, Williamson R, Zahn O, Zenteno A. A massive, cooling-flow-induced starburst in the core of a luminous cluster of galaxies. Nature 2012; 488:349-52. [DOI: 10.1038/nature11379] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 07/12/2012] [Indexed: 11/09/2022]
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Dobbs MA, Lueker M, Aird KA, Bender AN, Benson BA, Bleem LE, Carlstrom JE, Chang CL, Cho HM, Clarke J, Crawford TM, Crites AT, Flanigan DI, de Haan T, George EM, Halverson NW, Holzapfel WL, Hrubes JD, Johnson BR, Joseph J, Keisler R, Kennedy J, Kermish Z, Lanting TM, Lee AT, Leitch EM, Luong-Van D, McMahon JJ, Mehl J, Meyer SS, Montroy TE, Padin S, Plagge T, Pryke C, Richards PL, Ruhl JE, Schaffer KK, Schwan D, Shirokoff E, Spieler HG, Staniszewski Z, Stark AA, Vanderlinde K, Vieira JD, Vu C, Westbrook B, Williamson R. Frequency multiplexed superconducting quantum interference device readout of large bolometer arrays for cosmic microwave background measurements. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:073113. [PMID: 22852677 DOI: 10.1063/1.4737629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A technological milestone for experiments employing transition edge sensor bolometers operating at sub-Kelvin temperature is the deployment of detector arrays with 100s-1000s of bolometers. One key technology for such arrays is readout multiplexing: the ability to read out many sensors simultaneously on the same set of wires. This paper describes a frequency-domain multiplexed readout system which has been developed for and deployed on the APEX-SZ and South Pole Telescope millimeter wavelength receivers. In this system, the detector array is divided into modules of seven detectors, and each bolometer within the module is biased with a unique ∼MHz sinusoidal carrier such that the individual bolometer signals are well separated in frequency space. The currents from all bolometers in a module are summed together and pre-amplified with superconducting quantum interference devices operating at 4 K. Room temperature electronics demodulate the carriers to recover the bolometer signals, which are digitized separately and stored to disk. This readout system contributes little noise relative to the detectors themselves, is remarkably insensitive to unwanted microphonic excitations, and provides a technology pathway to multiplexing larger numbers of sensors.
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Niedzielski J, Bluett J, Williamson R, Liao Z, Gomez D, Court L. SU-E-T-575: To Analyze the Clinical Impact of Esophageal Sparing on Treatment Plans for Patients with Grade 3 Esophagitis. Med Phys 2012; 39:3838. [DOI: 10.1118/1.4735664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Williamson R, Bluett J, Niedzielski J, Liao Z, Gomez D, Court L. SU-E-T-558: Assessing the Effect of Inter-Fractional Motion in Esophageal Sparing Plans. Med Phys 2012; 39:3834. [DOI: 10.1118/1.4735647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Li HK, Harding V, Williamson R, Blagden S, Gabra H, Agarwal R. Cerebral sinus thrombosis and leptomeningeal carcinomatosis in a patient with ovarian cancer. J Clin Oncol 2011; 30:e19-20. [PMID: 22162572 DOI: 10.1200/jco.2011.38.1426] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Hughes EK, Nassar L, Lim A, Barrett N, Comitis S, Cunningham D, Flais S, Gupta A, Ralleigh G, Stewart V, Svensson W, Williamson R, Zaman N, Satchithananda K. Automated breast volume scanner: an initial experience. Breast Cancer Res 2011; 13 Suppl 1:O1-6, P1-47. [PMID: 22151232 PMCID: PMC3238232 DOI: 10.1186/bcr2947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Williamson R, Sutherland C. Neuronal membranes are key to the pathogenesis of Alzheimer's disease: the role of both raft and non-raft membrane domains. Curr Alzheimer Res 2011; 8:213-21. [PMID: 21222605 DOI: 10.2174/156720511795256008] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Accepted: 07/02/2010] [Indexed: 11/22/2022]
Abstract
Membrane rafts are sterol- and sphingolipid-enriched domains that compartmentalize cellular processes. Membrane rafts isolated from post-mortem AD brain are enriched in both β-amyloid and phosphorylated tau. Proteolytic processing of APP to generate β-amyloid, the principle component of amyloid plaques, can occur in membrane rafts, implicating them in the pathogenesis of Alzheimer's disease (AD). Secondary to their role in β-amyloid generation, membrane rafts have more recently been implicated in the accumulation, aggregation and degradation of β-amyloid, with evidence supporting a specific role for membrane raft gangliosides in the binding and aggregation of β-amyloid. In addition, membrane domain composition has a direct impact on both the generation of β-amyloid and its subsequent toxic actions and as such is a key target for the development of therapeutic strategies. This mini-review will focus on recent advances in our understanding of the relevance of membrane composition, of both raft and non-raft domains, to AD progression in models and in human disease. We will discuss how manipulation of membrane composition can alter both the proteolytic processing of APP and the subsequent binding and aggregation of β-amyloid peptide.
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Morling J, Williamson R, Strachan M, Price J, Glancy S, Nee L. P2-201 Changes in aminotransferases indicate changes in hepatosteatosis in people with type 2 diabetes: the Edinburgh type 2 diabetes study. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976j.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Morling J, Williamson R, Strachan M, Price J, Nee L, Glancy S. P2-202 Thiazolidinediones are associated with regression of hepatosteatosis in people with type 2 diabetes: the Edinburgh type 2 diabetes study. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976j.35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Yang J, Williamson R, Garden A, Rosenthal D, Zhang Y, Zhang L, Ang K, Dong L. SU-E-J-99: Multi-Atlas Based Auto-Segmentation of Low-Risk Clinical Target Volume (CTV) for Head-and-Neck Radiotherapy. Med Phys 2011. [DOI: 10.1118/1.3611867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Shah V, Panay N, Williamson R, Hemingway A. Hysterosalpingogram: an essential examination following Essure hysteroscopic sterilisation. Br J Radiol 2010; 84:805-12. [PMID: 21123309 DOI: 10.1259/bjr/95330860] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES The aim of this study was to describe our experience of imaging following hysteroscopic sterilisation with the Essure (Conceptus Inc., Mountain View, San Carlos, CA) microinsert, and to underline the importance of a carefully performed follow-up hysterosalpingogram (HSG) in the management of these patients. METHODS 18 women underwent the procedure and all returned for follow-up HSG. A standard HSG technique was used and views were acquired to establish microinsert position and tubal occlusion. RESULTS In 16 of the 18 women, adequate microinsert positioning and bilateral tubal occlusion was present. In one woman, a unilateral microinsert occluded the fallopian tube, whereas the other fallopian tube was ligated with a clip. The final patient underwent two studies; both showed well-positioned microinserts but unilateral free spill from the right fallopian tube. There are no reported pregnancies thus far. CONCLUSION Essure sterilisation coils have a unique appearance when radiographed and are an effective means of permanently occluding the fallopian tubes. HSG is a rapid and safe method of confirming satisfactory placement and tubal occlusion. Non-HSG imaging techniques are suboptimal at detecting patent fallopian tubes and expose patients to the risk of an unwanted and potentially complicated pregnancy.
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Williamson R. The isolation of rapidly labelled deoxyribonucleic acid fragments of nuclear origin from the polyribosome fraction of cultured embryonic liver cells. Biochem J 2010; 117:59P-60P. [PMID: 16742698 PMCID: PMC1178991 DOI: 10.1042/bj1170059pb] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Williamson R. Life & Death. West J Med 2009. [DOI: 10.1136/bmj.b2411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Zaibak F, Kozlovski J, Vadolas J, Sarsero JP, Williamson R, Howden SE. Integration of functional bacterial artificial chromosomes into human cord blood-derived multipotent stem cells. Gene Ther 2009; 16:404-14. [PMID: 19177134 DOI: 10.1038/gt.2008.187] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2008] [Revised: 12/15/2008] [Accepted: 12/15/2008] [Indexed: 01/14/2023]
Abstract
Stem cells from a patient with a genetic disease could be used for cell therapy if it were possible to insert a functional copy of the defective gene. In this study, we investigate the transfection and subsequent integration of large genomic fragments into human cord blood-derived multipotent stem cells. We describe for the first time the creation of clonal stem cells carrying a human bacterial artificial chromosome (BAC) containing the Friedreich ataxia locus with an enhanced green fluorescent protein (EGFP) reporter gene fused to exon 5a of the frataxin (FXN) gene. Integration of the BAC into the host cell genome was confirmed by PCR, Southern blot and fluorescent in situ hybridization analysis. Reverse transcription-PCR and flow cytometry confirmed expression of FXN-EGFP. Correct mitochondrial localization of the protein was confirmed using fluorescent microscopy. The transfected stem cells also retained the ability to differentiate into cells from all three germline layers, as demonstrated by the capacity to form neuron-specific beta-tubulin-expressing cells, Alizarin Red S-positive bone-like cells, and epithelial-like cells expressing surfactant protein C. This is the first study to demonstrate that cord blood-derived multipotent stem cells may be useful targets for gene therapy applications using large genomic loci.
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Büchler MW, Seiler CM, Monson JRT, Flamant Y, Thompson-Fawcett MW, Byrne MM, Mortensen ER, Altman JFB, Williamson R. Clinical trial: alvimopan for the management of post-operative ileus after abdominal surgery: results of an international randomized, double-blind, multicentre, placebo-controlled clinical study. Aliment Pharmacol Ther 2008; 28:312-25. [PMID: 19086236 DOI: 10.1111/j.1365-2036.2008.03696.x] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Post-operative ileus (POI) affects most patients undergoing abdominal surgery. AIM To evaluate the effect of alvimopan, a peripherally acting mu-opioid receptor antagonist, on POI by negating the impact of opioids on gastrointestinal (GI) motility without affecting analgesia in patients outside North America. METHODS Adult subjects undergoing open abdominal surgery (n = 911) randomly received oral alvimopan 6 or 12 mg, or placebo, 2 h before, and twice daily following surgery. Opioids were administered as intravenous patient-controlled analgesia (PCA) or bolus injection. Time to recovery of GI function was assessed principally using composite endpoints in subjects undergoing bowel resection (n = 738). RESULTS A nonsignificant reduction in mean time to tolerate solid food and either first flatus or bowel movement (primary endpoint) was observed for both alvimopan 6 and 12 mg; 8.5 h (95% CI: 0.9, 16.0) and 4.8 h (95% CI: -3.2, 12.8), respectively. However, an exploratory post hoc analysis showed that alvimopan was more effective in the PCA (n = 317) group than in the non-PCA (n = 318) group. Alvimopan was well tolerated and did not reverse analgesia. CONCLUSION Although the significant clinical effect of alvimopan on reducing POI observed in previous trials was not reproduced, this trial suggests potential benefit in bowel resection patients who received PCA.
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Ohlsen RI, Williamson R, Yusufi B, Mullan J, Irving D, Mukherjee S, Page E, Aitchison KJ, Barnes TRE. Interrater reliability of the Antipsychotic Non-Neurological Side-Effects Rating Scale measured in patients treated with clozapine. J Psychopharmacol 2008; 22:323-9. [PMID: 18541627 DOI: 10.1177/0269881108091069] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The Antipsychotic Non-Neurological Side-Effects Rating Scale (ANNSERS) was developed to provide a comprehensive measure for rating non-neurological adverse drug reactions (ADRs) to antipsychotics. Although there were already available measures that adequately rated specific non-neurological ADRs, such as sexual side effects, a need was identified for a scale that comprehensively rated the full range of non-neurological ADRs commonly seen across the spectrum of first and second generation antipsychotic drugs, including metabolic and autonomic ADRs. This article reports on work to establish the interrater reliability of an early version and a later, more comprehensive version of the ANNSERS (versions 1 and 2, v1 and v2, respectively). The measures were administered in London centres to patients treated with clozapine. Trained clinicians rated the patients simultaneously and independently. Interrater reliability on the scores was calculated using the kappa coefficient method. The results (mean kappa coefficients of 0.77 and 0.72, respectively) indicate that substantial interrater reliability was achieved for both versions. Items for which the main basis for rating was laboratory investigations rather than patient interview were largely excluded from this study, and kappas were also not calculated for items with a low frequency (less than 10%) of endorsement. Samples of patients on other antipsychotics would be required to reliably calculate kappa coefficients for these items. In conclusion, the ANNSERS represents a clinically applicable research innovation, with good interrater reliability on clinician judged items, which is now available for the comprehensive assessment of non-neurological ADRs to antipsychotics, to aid the processes of clinical audit, research and drug discovery.
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Humphries SE, Berg K, Gill L, Cumming AM, Robertson FW, Stalenhoef AFH, Williamson R, Børresen AL. The gene for apolipoprotein C-ll is closely linked to the gene for apolipoprotein E on chromosome 19. Clin Genet 2008. [DOI: 10.1111/j.1399-0004.1984.tb01078.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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