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Schafer M, Kheyfets V, Schroeder J, Podgorski C, Dunning J, Buckner JK, Hunter K, Fenster B. PULMONARY ARTERY WALL SHEAR STRESS IS A MARKER OF PULMONARY VASCULAR HEMODYNAMICS. J Am Coll Cardiol 2015. [DOI: 10.1016/s0735-1097(15)61560-1] [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: 10/23/2022]
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Rhee SH, Zhang P, Hunter K, Mama ST, Caraballo R, Holzberg AS, Seftel RH, Seftel AD, Echols KT, DiSanto ME. Pelvic organ prolapse is associated with alteration of sphingosine-1-phosphate/Rho-kinase signalling pathway in human vaginal wall. J OBSTET GYNAECOL 2015; 35:726-32. [DOI: 10.3109/01443615.2015.1004527] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Check JH, Sarumi M, DiAntonio A, Hunter K, Simpkins G, Duroseau M. Serum levels of the progesterone induced blocking factor do not precipitously rise in women with gynecologic cancer in contrast to women exposed to progesterone. CLIN EXP OBSTET GYN 2015; 42:563-567. [PMID: 26524797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
PURPOSE To determine if an immunomodulatory protein (progesterone induced blocking factor [PIBF]) that is progesterone induced and found in higher concentration during pregnancy is similarly found with increased levels in women with gynecologic cancers. MATERIALS AND METHODS A newly developed enzyme linked immunoabsorbent assay (ELISA) assay was used to measure PIBF in the sera of six women with various gynecologic cancers and compare them to five controls (three with benign tumors and two having gynecologic procedures for non-tumors. RESULTS The PIBF levels in women with gynecologic cancer did not rise precipitously as historical controls of women or men exposed to progesterone. The two highest PIBF levels of the 11 subjects were in women with gynecologic cancer. CONCLUSIONS The data suggest that if PIBF helps cancer cells to evade immune surveillance, it probably operates through an intracytoplasmic presence. If an increase in sera PIBF could have been detected in women with gynecologic cancer, then this ELISA test could have been used to detect tumor recurrence. Future studies may concentrate on evaluating intracytoplasmic PIBF to possibly help determine which tumors may respond to progesterone antagonist receptors.
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Bina S, Hunter K, Mama S. Pre-Operative Risk Assessment for Conversion to Laparotomy in Patients Undergoing Gynecologic Robotic Surgeries. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2014.08.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Schreier DA, Hacker TA, Hunter K, Eickoff J, Liu A, Song G, Chesler N. Impact of increased hematocrit on right ventricular afterload in response to chronic hypoxia. J Appl Physiol (1985) 2014; 117:833-9. [PMID: 25170068 DOI: 10.1152/japplphysiol.00059.2014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Chronic hypoxia causes chronic mountain sickness through hypoxia-induced pulmonary hypertension (HPH) and increased hematocrit. Here, we investigated the impact of increased hematocrit and HPH on right ventricular (RV) afterload via pulmonary vascular impedance. Mice were exposed to chronic normobaric hypoxia (10% oxygen) for 10 (10H) or 21 days (21H). After baseline hemodynamic measurements, ∼500 μl of blood were extracted and replaced with an equal volume of hydroxyethylstarch to normalize hematocrit and all hemodynamic measurements were repeated. In addition, ∼500 μl of blood were extracted and replaced in control mice with an equal volume of 90% hematocrit blood. Chronic hypoxia increased input resistance (Z0 increased 82% in 10H and 138% in 21H vs. CTL; P < 0.05) and characteristic impedance (ZC increased 76% in 10H and 109% in 21H vs. CTL; P < 0.05). Hematocrit normalization did not decrease mean pulmonary artery pressure but did increase cardiac output such that both Z0 and ZC decreased toward control levels. Increased hematocrit in control mice did not increase pressure but did decrease cardiac output such that Z0 increased. The paradoxical decrease in ZC with an acute drop in hematocrit and no change in pressure are likely due to inertial effects secondary to the increase in cardiac output. A novel finding of this study is that an increase in hematocrit affects the pulsatile RV afterload in addition to the steady RV afterload (Z0). Furthermore, our results highlight that the conventional interpretation of ZC as a measure of proximal artery stiffness is not valid in all physiological and pathological states.
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Tan Y, Tseng PO, Wang D, Zhang H, Hunter K, Hertzberg J, Stenmark KR, Tan W. Stiffening-induced high pulsatility flow activates endothelial inflammation via a TLR2/NF-κB pathway. PLoS One 2014; 9:e102195. [PMID: 25029271 PMCID: PMC4100881 DOI: 10.1371/journal.pone.0102195] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Accepted: 06/16/2014] [Indexed: 12/25/2022] Open
Abstract
Stiffening of large arteries is increasingly used as an independent predictor of risk and therapeutic outcome for small artery dysfunction in many diseases including pulmonary hypertension. The molecular mechanisms mediating downstream vascular cell responses to large artery stiffening remain unclear. We hypothesize that high pulsatility flow, induced by large artery stiffening, causes inflammatory responses in downstream pulmonary artery endothelial cells (PAECs) through toll-like receptor (TLR) pathways. To recapitulate the stiffening effect of large pulmonary arteries that occurs in pulmonary hypertension, ultrathin silicone tubes of variable mechanical stiffness were formulated and were placed in a flow circulatory system. These tubes modulated the simulated cardiac output into pulsatile flows with different pulsatility indices, 0.5 (normal) or 1.5 (high). PAECs placed downstream of the tubes were evaluated for their expression of proinflammatory molecules (ICAM-1, VCAM-1, E-selectin and MCP-1), TLR receptors and intracellular NF-κB following flow exposure. Results showed that compared to flow with normal pulsatility, high pulsatility flow induced proinflammatory responses in PAECs, enhanced TLR2 expression but not TLR4, and caused NF-κB activation. Pharmacologic (OxPAPC) and siRNA inhibition of TLR2 attenuated high pulsatility flow-induced pro-inflammatory responses and NF-κB activation in PAECs. We also observed that PAECs isolated from small pulmonary arteries of hypertensive animals exhibiting proximal vascular stiffening demonstrated a durable ex-vivo proinflammatory phenotype (increased TLR2, TLR4 and MCP-1 expression). Intralobar PAECs isolated from vessels of IPAH patients also showed increased TLR2. In conclusion, this study demonstrates for the first time that TLR2/NF-κB signaling mediates endothelial inflammation under high pulsatility flow caused by upstream stiffening, but the role of TLR4 in flow pulsatility-mediated endothelial mechanotransduction remains unclear.
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Bawden SJ, Stephenson MC, Ciampi E, Hunter K, Marciani L, Spiller RC, Aithal GP, Morris PG, Macdonald IA, Gowland PA. A low calorie morning meal prevents the decline of hepatic glycogen stores: a pilot in vivo13C magnetic resonance study. Food Funct 2014; 5:2237-42. [DOI: 10.1039/c4fo00050a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A low dose oral glucose challenge following an overnight fast inhibits further reduction in hepatic glycogen reserves without raising levels above baseline.
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Truong U, Patel S, Fonseca B, Dunning J, Ivy D, Shandas R, Hunter K. Combined CMR and catheterization data in determining right ventricular-arterial coupling in children and adolescents with pulmonary arterial hypertension. J Cardiovasc Magn Reson 2014. [PMCID: PMC4044105 DOI: 10.1186/1532-429x-16-s1-o43] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Williams NC, Hunter K, Johnson MA, Sharpe GR. A RANDOMISED PLACEBO CONTROLLED TRIAL TO COMPARE THE EFFECTS OF TWO DOSAGES OF OMEGA-3 PUFA ON EXERCISE-INDUCED BRONCHOCONSTRICTION (EIB). Br J Sports Med 2013. [DOI: 10.1136/bjsports-2013-093073.52] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Altmann DR, Button T, Schmierer K, Hunter K, Tozer DJ, Wheeler-Kingshott CA, Coles A, Miller DH. Sample sizes for lesion magnetisation transfer ratio outcomes in remyelination trials for multiple sclerosis. Mult Scler Relat Disord 2013; 3:237-43. [PMID: 25878011 DOI: 10.1016/j.msard.2013.09.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 09/06/2013] [Accepted: 09/16/2013] [Indexed: 11/26/2022]
Abstract
BACKGROUND Enhancing remyelination in MS might improve function and protect axons from future damage. Lesion magnetisation transfer ratio (MTR) is sensitive to myelin content, and may be a useful measure for trials evaluating potential remyelinating agents. OBJECTIVE Estimating sample sizes required for a parallel group, placebo-controlled trial in MS using change in mean MTR of all T2lesions as a primary outcome measure. METHODS The primary sample size calculation was derived from data from a natural history study of relapsing remitting MS (n=18). The MTR values observed in demyelinated and remyelinated lesions in an ex vivo study were used to estimate the effect of remyelination on lesion MTR. The ex vivo data were also used to independently calculate sample sizes in order to inform the robustness of the in vivo estimates. RESULTS Calculations suggest that 30% remyelination of T2 lesions could be detected with 80% power in 38 (95% confidence interval 12-96) patients per arm based on the in vivo data, and in 66 per arm based on the ex vivo data. CONCLUSION The sample sizes derived are in a range that makes MTR a feasible outcome measure for proof-of-concept trials of putative therapies achieving remyelination in MS lesions.
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Arter A, Saely S, Reed B, Zimmerman LH, Hunter K, Levy P. Appropriate Use of Intravenous Antihypertensive Medications for Elevated Blood Pressure in the Emergency Department. Ann Emerg Med 2013. [DOI: 10.1016/j.annemergmed.2013.07.383] [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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Truong U, Fonseca B, Dunning J, Burgett S, Lanning C, Ivy DD, Shandas R, Hunter K, Barker AJ. Wall shear stress measured by phase contrast cardiovascular magnetic resonance in children and adolescents with pulmonary arterial hypertension. J Cardiovasc Magn Reson 2013; 15:81. [PMID: 24034144 PMCID: PMC3848825 DOI: 10.1186/1532-429x-15-81] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 09/03/2013] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Pulmonary arterial hypertension (PAH) is a devastating disease with significant morbidity and mortality. At the macroscopic level, disease progression is observed as a complex interplay between mean pulmonary artery pressure, pulmonary vascular resistance, pulmonary vascular stiffness, arterial size, and flow. Wall shear stress (WSS) is known to mediate or be dependent on a number of these factors. Given that WSS is known to promote architectural vessel remodeling, it is imperative that the changes of this factor be quantified in the presence of PAH. METHODS In this study, we analyzed phase contrast imaging of the right pulmonary artery derived from cardiovascular magnetic resonance to quantify the local, temporal and circumferentially averaged WSS of a PAH population and a pediatric control population. In addition, information about flow and relative area change were derived. RESULTS Although the normotensive and PAH shear waveform exhibited a WSS profile which is uniform in magnitude and direction along the vessel circumference at systole, time-averaged WSS (2.2 ± 1.6 vs. 6.6 ± 3.4 dynes/cm(2), P = 0.018) and systolic WSS (8.2 ± 5.0 v. 20.0 ± 9.1 dynes/cm(2), P = 0.018) was significantly depressed in the PAH population as compared to the controls. BSA-indexed PA diameter was significantly larger in the PAH population (1.5 ± 0.4 vs. 0.7 ± 0.1 cm/m(2), P = 0.003). CONCLUSIONS In the presence of preserved flow rates through a large PAH pulmonary artery, WSS is significantly decreased. This may have implications for proximal pulmonary artery remodeling and cellular function in the progression of PAH.
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Irwin N, Hunter K, Montgomery IA, Flatt PR. Comparison of independent and combined metabolic effects of chronic treatment with (pGlu-Gln)-CCK-8 and long-acting GLP-1 and GIP mimetics in high fat-fed mice. Diabetes Obes Metab 2013; 15:650-9. [PMID: 23388064 DOI: 10.1111/dom.12079] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 01/20/2013] [Accepted: 02/01/2013] [Indexed: 12/25/2022]
Abstract
AIM The incretin hormones, glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) and cholecystokinin (CCK) are gastrointestinal peptides with important physiological effects. However, rapid enzymatic degradation results in short-lived biological actions. METHODS This study has examined metabolic actions of exendin-4, GIP[mPEG] and a novel CCK-8 analogue, (pGlu-Gln)-CCK-8 as enzymatically stable forms of GLP-1, GIP and CCK, respectively. RESULTS All peptides significantly (p < 0.01-p < 0.001) stimulated insulin secretion from BRIN BD11 cells, and acute in vivo experiments confirmed prominent antihyperglycaemic and insulinotropic responses to GLP-1 or GIP receptor activation in normal mice. Twice daily injection of (pGlu-Gln)-CCK-8 alone and in combination with exendin-4 or GIP[mPEG] in high fat-fed mice significantly decreased accumulated food intake (p < 0.05-p < 0.01), body weight gain (p < 0.05-p < 0.01) and improved (p < 0.05) insulin sensitivity in high fat-fed mice. However, there was no evidence for superior effects compared to (pGlu-Gln)-CCK-8 alone. Combined treatment of (pGlu-Gln)-CCK-8 and exendin-4 resulted in significantly (p < 0.05) lowered circulating glucose levels and improved (p < 0.05) intraperitoneal glucose tolerance. These effects were superior to either treatment regime alone but not associated with altered insulin concentrations. A single injection of (pGlu-Gln)-CCK-8, or combined with exendin-4, significantly (p < 0.05) lowered blood glucose levels 24 h post injection in untreated high fat-fed mice. CONCLUSION This study highlights the potential of (pGlu-Gln)-CCK-8 alone and in combination with incretin hormones for the treatment of type 2 diabetes.
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Han BK, Bhatia R, Traisak P, Milcarek B, Hunter K, Schorr C, Kolasinski SL. THU0295 Systemic Lupus Erythematosus (SLE) Patients with Infection Admitted to the Intensive Care Unit had a Higher Mortality but their White Blood Cell (WBC) Count was Not Different Compared to SLE Patients with Non-Infectious Causes. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Han BK, Bhatia R, Traisak P, Hunter K, Milcarek B, Schorr C, Eid H, Feinstein D, Cronin P, Kolasinski SL. Clinical presentations and outcomes of systemic lupus erythematosus patients with infection admitted to the intensive care unit. Lupus 2013; 22:690-6. [DOI: 10.1177/0961203313490240] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective The objective of this article is to investigate clinical presentations and outcomes of systemic lupus erythematosus (SLE) patients with infection admitted to the intensive care unit (ICU). Methods SLE patients with infection, SLE patients with noninfectious causes, and non-SLE patients with infection were identified from the Cooper University Hospital Project IMPACT database between 2002 and 2010. We examined demographic data, APACHE II scores, physiologic data, laboratory data, length of stay in the ICU and hospital, and mortality of the three groups. Results Twenty-five SLE patients with infection, 45 SLE patients with noninfectious causes, and 1466 non-SLE patients with infection were included in the study. SLE patients with infection had higher APACHE II scores, higher maximum temperature, higher minimum and maximum heart rate (HR), lower minimum and maximum systolic blood pressure (SBP), and longer ICU length of stay in comparison to SLE patients with noninfectious causes. There were no statistical differences in white blood cell (WBC) count. SLE patients with infection had a higher mortality compared to SLE patients with noninfectious causes. There was no difference in mortality between SLE patients with infection and non-SLE patients with infection. Conclusion SLE patients with infection in the ICU had a higher mortality and a higher APACHE II score compared to SLE patients with noninfectious causes in the ICU. Their physiologic signs including temperature, HR, and SBP were more reflective of infection than their WBC count.
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Ryan A, Hunter K, Cunningham K, Williams J, O'Shea H, Rooney P, Hickey F. STEPS: lean thinking, theory of constraints and identifying bottlenecks in an emergency department. IRISH MEDICAL JOURNAL 2013; 106:105-107. [PMID: 23691842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This study aimed to identify the bottlenecks in patients' journeys through an emergency department (ED). For each stage of the patient journey, the average times were compared between two groups divided according to the four hour time frame and disproportionate delays were identified using a significance test These bottlenecks were evaluated with reference to a lean thinking value-stream map and the five focusing steps of the theory of constraints. A total of 434 (72.5%) ED patients were tracked over one week. Logistic regression showed that patients who had radiological tests, blood tests or who were admitted were 4.4, 4.1 and 7.7 times more likely, respectively, to stay over four hours in the ED than those who didn't The stages that were significantly delayed were the time spent waiting for radiology (p = 0.001), waiting for the in-patient team (p = 0.004), waiting for a bed (p < 0.001) and ED doctor turnaround time (p < 0.001).
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Lee C, Hunter K, Vineberg K, Eisbruch A, Teo K, Kirk M, Lin A. Non-intensity Modulated Proton Versus Intensity Modulated Photon Planning for Complex Head-and-Neck Tumors. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Brown J, Keay L, Hunter K, Bilston L, Simpson J, Ivers R. Increases in best practice child restraint use among children aged 2–5 years in low socioeconomic areas after introduction of mandatory child restraint laws in NSW Australia. Inj Prev 2012. [DOI: 10.1136/injuryprev-2012-040590d.32] [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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Keay L, Hunter K, Brown J, Simpson JM, Bilston LE, Elliott M, Stevenson M, Ivers RQ. Cluster randomised trial of an integrated, education, restraint subsidisation and fitting programme to increase child restraint use in 3-year-old to 5-year-old children. Inj Prev 2012. [DOI: 10.1136/injuryprev-2012-040590d.45] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Park CK, Kim YH, Kim JW, Kim TM, Choi SH, Kim YJ, Choi BS, Lee SH, Kim CY, Kim IH, Lee DZ, Kheder A, Forbes M, Craven I, Hadjivassiliou M, Shonka NA, Kessinger A, Aizenberg MR, Weller M, Meisner C, Platten M, Simon M, Nikkhah G, Papsdorf K, Sabel M, Braun C, Reifenberger G, Wick W, Alexandru D, Haghighi B, Muhonen MG, Chamberlain MC, Sumrall AL, Burri S, Brick W, Asher A, Murillo-Medina K, Guerrero-Maldonado A, Ramiro AJ, Cervantes-Sanchez G, Erazo-Valle-Solis AA, Garcia-Navarro V, Sperduto PW, Shanley R, Luo X, Kased N, Sneed PK, Roberge D, Chao S, Weil R, Suh J, Bhatt A, Jensen A, Brown PD, Shih H, Kirkpatrick J, Gaspar LE, Fiveash J, Chiang V, Knisely J, Sperduto CM, Lin N, Mehta MP, Anderson MD, Raghunathan A, Aldape KD, Fuller GN, Gilbert MR, Robins HI, Wang M, Gilbert MR, Chakravarti A, Grimm S, Penas-Prado M, Chaudhary R, Anderson PJ, Elinzano H, Gilbert RA, Mehta M, Aoki T, Ueba T, Arakawa Y, Miyatake SI, Tsukahara T, Miyamoto S, Nozaki K, Taki W, Matsutani M, Shakur SF, Bit-Ivan E, Watkin WG, Farhat HI, Merrell RT, Zwinkels H, Dorr J, Kloet A, Taphoorn MJ, Vecht CJ, Bogdahn U, Stockhammer G, Mahapatra A, Hau P, Schuknecht B, van den Bent M, Heinrichs H, Yust-Katz S, Liu V, Sanghee K, Groves M, Puduvalli V, Levin V, Conrad C, Colman H, Hsu S, Yung AW, Gilbert MR, Kunz M, Armbruster L, Thon N, Jansen N, Lutz J, Herms J, Egensperger R, Eigenbrod S, Kretzschmar H, La CF, Tonn JC, Kreth FW, Brandes AA, Franceschi E, Agati R, Poggi R, Dall'Occa P, Bartolotti M, Di Battista M, Marucci G, Girardi F, Ermani M, Sherman W, Raizer J, Grimm S, Ruckser R, Tatzreiter G, Pfisterer W, Oberhauser G, Honigschnabel S, Aboul-Enein F, Ausch C, Kitzweger E, Hruby W, Sebesta C, Green RM, Woyshner EA, Suchorska B, Jansen NL, Janssen H, Kretzschmar H, Simon M, Hentschel B, Poepperl G, Kreth FW, Linn J, LaFougere C, Weller M, Tonn JC, Suchorska B, Jansen NL, Graute V, Eigenbrod S, Bartenstein P, Kreth FW, LaFougere C, Tonn JC, Hassanzadeh B, Tohidi V, Levacic D, Landolfi JC, Singer S, DeBraganca K, Omuro A, Grommes C, Omar AI, Jalan P, Pandav V, Bekker S, Fuente MIDL, Kaley T, Zhao S, Chen X, Soffietti R, Magistrello M, Bertero L, Bosa C, Crasto SG, Garbossa D, Lolli I, Trevisan E, Ruda R, Ruda R, Bertero L, Bosa C, Trevisan E, Pace A, Carapella C, Dealis C, Caroli M, Faedi M, Bomprezzi C, Thomas AA, Dalmau J, Gresa-Arribas N, Fadul CE, Kumthekar PU, Raizer J, Grimm S, Herrada J, Antony N, Richards M, Gupta A, Landeros M, Arango C, Campos-Gines AF, Friedman P, Wilson H, Streeter JC, Cohen A, Gilreath J, Sageser D, Ye X, Bell SD, McGregor J, Bourekas E, Cavaliere R, Newton H, Sul J, Odia Y, Zhang W, Shih J, Butman JA, Hammoud D, Kreisl TN, Iwamoto F, Fine HA, Berriel LG, Santos FN, Levy AC, Fanelli MF, Chinen LT, da Costa AA, Bourekas E, Wayne Slone H, Bell SD, McGregor J, Bokstein F, Blumenthal DT, Shpigel S, Phishniak L, Yust-Katz S, Garciarena P, Liue D, Yuan Y, Groves MD, Wong ET, Villano JL, Engelhard HH, Ram Z, Sahebjam S, Millar BA, Sahgal A, Laperriere N, Mason W, Levin VA, Hess KR, Choucair AK, Flynn PJ, Jaeckle KA, Kyritsis AP, Yung WKA, Prados MD, Bruner JM, Ictech S, Nghiemphu PL, Lai A, Green RM, Cloughesy TF, Zaky W, Gilles F, Grimm J, Bluml S, Dhall G, Rosser T, Randolph L, Wong K, Olch A, Krieger M, Finlay J, Capellades J, Verger E, Medrano S, Gonzalez S, Gil M, Reynes G, Ribalta T, Gallego O, Segura PP, Balana C, Gwak HS, Joo J, Kim S, Yoo H, Shin SH, Han JY, Kim HT, Yun T, Lee JS, Lee SH, Kim W, Vogelbaum MA, Wang M, Peereboom DM, Macdonald DR, Giannini C, Suh JH, Jenkins RB, Laack NN, Brackman DG, Shrieve DC, Souhami L, Mehta MP, Leibetseder A, Wohrer A, Ackerl M, Flechl B, Sax C, Spiegl-Kreinecker S, Pichler J, Widhalm G, Dieckmann K, Preusser M, Marosi C, Sebastian C, Alejandro M, Bernadette C, Naomi A, Kavan P, Sahebjam S, Garoufalis E, Guiot MC, Muanza T, Del Maestro R, Petrecca K, Sharma R, Curry R, Joyce J, Rosenblum M, Jaffe E, Matasar M, Lin O, Fisher R, Omuro A, Yin C, Iwamoto FM, Fraum TJ, Nayak L, Diamond EL, DeAngelis LM, Pentsova E, Vera-Bolanos E, Gilbert MR, Aldape K, Necesito-Reyes MJ, Fouladi M, Gajjar A, Goldman S, Metellus P, Mikkelsen T, Omuro A, Packer R, Partap S, Pollack IF, Prados M, Ian Robins H, Soffietti R, Wu J, Armstrong TS, Nakada M, Hayashi Y, Miyashita K, Kinoshita M, Furuta T, Sabit H, Kita D, Hayashi Y, Uchiyam N, Kawakami K, Minamoto T, Hamada JI, Diamond EL, Rosenblum M, Heaney M, Carrasquillo J, Krauthammer A, Nolan C, Kaley TJ, Gil MJ, Fuster J, Balana C, Benavides M, Mesia C, Etxaniz O, Canellas J, Perez-Martin X, Hunter K, Johnston SK, Bridge CA, Rockne RC, Guyman L, Baldock AL, Rockhill JK, Mrugala MM, Beard BC, Adair JE, Kiem HP, Swanson KR, Ranjan T, Desjardins A, Peters KB, Alderson L, Kirkpatrick J, Herndon J, Bailey L, Sampson J, Friedman AH, Friedman H, Vredenburgh JJ, Theeler BJ, Ellezam B, Melguizo-Gavilanes I, Shonka NA, Bruner JM, Puduvalli VK, Taylor JW, Flanagan E, O'Neill B, Seigal T, Omuro A, DeAngelis L, Baerhing J, Hoang-Xuan K, Chamberlain M, Batchelor T, Nishikawa R, Pinto F, Blay JY, Korfel A, Schiff D, Fu BD, Kong XT, Bota D, Omuro A, Beal K, Ivy P, Gutin P, Wu N, Kaley T, Karimi S, DeAngelis L, Pentsova H, Nolan C, Grommes C, Chan T, Mathew R, Droms L, Shimizu F, Tabar V, Grossman S, Yovino S, Campian J, Wild A, Herman J, Brock M, Balmanoukian A, Ye X, Portnow J, Badie B, Synold T, Lacey S, D'Apuzzo M, Frankel P, Chen M, Aboody K, Letarte N, Gabay MP, Bressler LR, Stachnik JM, Villano JL, Jaeckle KA, Anderson SK, Willson A, Moreno-Aspitia A, Colon-Otero G, Patel T, Perez E, Peters KB, Reardon DA, Vredenburgh JJ, Desjardins A, Herndon JE, Coan A, McSherry F, Lipp E, Brickhouse A, Massey W, Friedman HS, Alderson LM, Desjardins A, Ranjan T, Peters KB, Friedman HS, Vredenburgh JJ, Ranjan T, Desjardins A, Peters KB, Alderson L, Kirkpatrick J, Herndon J, Bailey L, Sampson J, Friedman AH, Friedman H, Vredenburgh J, Welch MR, Omuro A, Grommes C, Westphal M, Bach F, Reuter D, Ronellenfitsch M, Steinbach J, Pietsch T, Connelly J, Hamza MA, Puduvalli V, Neal ML, Trister AD, Ahn S, Bridge C, Lange J, Baldock A, Rockne R, Mrugala M, Rockhill JK, Lai A, Cloughesy T, Swanson KR, Neuwelt AJ, Nguyen TM, Tyson RM, Nasseri M, Neuwelt EA, Bubalo JS, Barnes PD, Phuphanich S, Hu J, Rudnick J, Chu R, Yu J, Naruse R, Ljubimova J, Sanchez C, Guevarra A, Naor R, Black K, Mahta A, Bhavsar TM, Herath K, Huang C, McClain J, Rizzo K, Sheehan J, Chamberlain M, Glantz M, McClain J, Glantz MJ, Zoccoli C, Nicholas MK, Xie T, White D, Liker S, Gajewski T, Selfridge J, Piccioni DE, Zurayk M, Mody R, Quan J, Li S, Chen W, Chou A, Liau L, Green R, Cloughesy T, Lai A, Gomez-Molinar V, Ruiz-Gonzalez S, Valdez-Vazquez R, Arrieta O, Stenner JI. CLIN-NEURO/MEDICAL ONCOLOGY. Neuro Oncol 2012. [DOI: 10.1093/neuonc/nos229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Hunter K, Keay L, Clapham K, Lyford M, Brown J, Bilston L, Lo W, Ivers R. Understanding use of child restraints in Australian aboriginal families: a mixed methods approach. Inj Prev 2012. [DOI: 10.1136/injuryprev-2012-040590d.47] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Hearnden V, Rehman I, MacNeil S, Murdoch C, Thornhill M, Hunter K, Colley H. 1192 Investigation of Raman Spectroscopy and Optical Coherence Tomography to Aid in Diagnosis of Oral Cancer. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71785-9] [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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Dham B, Milcarek B, Hunter K, Rincon F. The Epidemiology of Status Epilepticus in the United States (S06.005). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Scott-Drechsel D, Su Z, Hunter K, Li M, Shandas R, Tan W. A new flow co-culture system for studying mechanobiology effects of pulse flow waves. Cytotechnology 2012; 64:649-66. [PMID: 22526489 DOI: 10.1007/s10616-012-9445-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Accepted: 02/21/2012] [Indexed: 11/29/2022] Open
Abstract
Artery stiffening is known as an important pathological change that precedes small vessel dysfunction, but underlying cellular mechanisms are still elusive. This paper reports the development of a flow co-culture system that imposes a range of arterial-like pulse flow waves, with similar mean flow rate but varied pulsatility controlled by upstream stiffness, onto a 3-D endothelial-smooth muscle cell co-culture. Computational fluid dynamics results identified a uniform flow area critical for cell mechanobiology studies. For validation, experimentally measured flow profiles were compared to computationally simulated flow profiles, which revealed percentage difference in the maximum flow to be <10, <5, or <1% for a high, medium, or low pulse flow wave, respectively. This comparison indicated that the computational model accurately demonstrated experimental conditions. The results from endothelial expression of proinflammatory genes and from determination of proliferating smooth muscle cell percentage both showed that cell activities did not vary within the identified uniform flow region, but were upregulated by high pulse flow compared to steady flow. The flow system developed and characterized here provides an important tool to enhance the understanding of vascular cell remodeling under flow environments regulated by stiffening.
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Lammers S, Scott D, Hunter K, Tan W, Shandas R, Stenmark KR. Mechanics and Function of the Pulmonary Vasculature: Implications for Pulmonary Vascular Disease and Right Ventricular Function. Compr Physiol 2012; 2:295-319. [PMID: 23487595 DOI: 10.1002/cphy.c100070] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The relationship between cardiac function and the afterload against which the heart muscle must work to circulate blood throughout the pulmonary circulation is defined by a complex interaction between many coupled system parameters. These parameters range broadly and incorporate system effects originating primarily from three distinct locations: input power from the heart, hydraulic impedance from the large conduit pulmonary arteries, and hydraulic resistance from the more distal microcirculation. These organ systems are not independent, but rather, form a coupled system in which a change to any individual parameter affects all other system parameters. The result is a highly nonlinear system which requires not only detailed study of each specific component and the effect of disease on their specific function, but also requires study of the interconnected relationship between the microcirculation, the conduit arteries, and the heart in response to age and disease. Here, we investigate systems-level changes associated with pulmonary hypertensive disease progression in an effort to better understand this coupled relationship.
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Sanga R, Zanotti S, Schorr C, Milcareck B, Hunter K, Dellinger P, Parrilo J. Relation between temperature in the initial 24 hours in patients with severe sepsis or septic shock with mortality and length of stay in the ICU. Crit Care 2012. [PMCID: PMC3363475 DOI: 10.1186/cc10664] [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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78
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Rachoin JS, Daher R, Moussallem C, Milcarek B, Hunter K, Schorr C, Abboud M, Henry P, Weisberg LS. The fallacy of the BUN:creatinine ratio in critically ill patients. Nephrol Dial Transplant 2011; 27:2248-54. [DOI: 10.1093/ndt/gfr705] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Prithviraj GK, Sommers SR, Jump RL, Halmos B, Chambless LB, Parker SL, Hassam-Malani L, McGirt MJ, Thompson RC, Chambless LB, Parker SL, Hassam-Malani L, McGirt MJ, Thompson RC, Hunter K, Chamberlain MC, Le EM, Lee ELT, Chamberlain MC, Sadighi ZS, Pearlman ML, Slopis JM, Vats TS, Khatua S, DeVito NC, Yu M, Chen R, Pan E, Cloughesy T, Raizer J, Drappatz J, Gerena-Lewis M, Rogerio J, Yacoub S, Desjardin A, Groves MD, DeGroot J, Loghin M, Conrad CA, Hess K, Ni J, Ictech S, Hunter K, Yung WA, Porter AB, Dueck AC, Karlin NJ, Chamberlain MC, Olson J, Silber J, Reiner AS, Panageas KS, Iwamoto FM, Cloughesy TF, Aldape KD, Rivera AL, Eichler AF, Louis DN, Paleologos NA, Fisher BJ, Ashby LS, Cairncross JG, Roldan GB, Wen PY, Ligon KL, Shiff D, Robins HI, Rocque BG, Chamberlain MC, Mason WP, Weaver SA, Green RM, Kamar FG, Abrey LE, DeAngelis LM, Jhanwar SC, Rosenblum MK, Lassman AB, Cachia D, Alderson L, Moser R, Smith T, Yunus S, Saito K, Mukasa A, Narita Y, Tabei Y, Shinoura N, Shibui S, Saito N, Flechl B, Ackerl M, Sax C, Dieckmann K, Crevenna R, Widhalm G, Preusser M, Marosi C, Marosi C, Ay C, Preusser M, Dunkler D, Widhalm G, Pabinger I, Dieckmann K, Zielinski C, Belongia M, Jogal S, Schlingensiepen KH, Bogdahn U, Stockhammer G, Mahapatra AK, Venkataramana NK, Oliushine V, Parfenov V, Poverennova I, Hau P, Jachimczak P, Heinrichs H, Mammoser AG, Shonka NA, de Groot JF, Shibahara I, Sonoda Y, Kumabe T, Saito R, Kanamori M, Yamashita Y, Watanabe M, Ishioka C, Tominaga T, Silvani A, Gaviani P, Lamperti E, Botturi A, DiMeco F, Broggi G, Fariselli L, Solero CL, Salmaggi A, Green RM, Woyshner EA, Cloughesy TF, Shu F, Oh YS, Iganej S, Singh G, Vemuri SL, Theeler BJ, Ellezam B, Gilbert MR, Aoki T, Kobayashi H, Takano S, Nishikawa R, Shinoura N, Nagane M, Narita Y, Muragaki Y, Sugiyama K, Kuratsu J, Matsutani M, Sadighi ZS, Khatua S, Langford LA, Puduvalli VK, Shen D, Chen ZP, Zhang JP, Chen ZP, Bedekar D, Rand S, Connelly J, Malkin M, Paulson E, Mueller W, Schmainda K, Gallego O, Benavides M, Segura PP, Balana C, Gil M, Berrocal A, Reynes G, Garcia JL, Murata P, Bague S, Quintana MJ, Vasishta VG, Nagane M, Kobayashi K, Tanaka M, Tsuchiya K, Shiokawa Y, Bavle AA, Ayyanar K, Puduvalli VK, Prado MP, Hess KR, Hunter K, Ictech S, Groves MD, Gilbert MR, Liu V, Conrad CA, de Groot J, Loghin ME, Colman H, Levin VA, Alfred Yung WK, Hackney JR, Palmer CA, Markert JM, Cure J, Riley KO, Fathallah-Shaykh H, Nabors LB, Saria MG, Corle C, Hu J, Rudnick J, Phuphanich S, Mrugala MM, Lee LK, Fu BD, Bota DA, Kim RY, Brown T, Feely H, Hu A, Drappatz J, Wen PY, Lee JW, Carter B, Kesari S, Fu BD, Kong XT, Bota DA, Fu BD, Bota DA, Sparagana S, Belousova E, Jozwiak S, Korf B, Frost M, Kuperman R, Kohrman M, Witt O, Wu J, Flamini R, Jansen A, Curtalolo P, Thiele E, Whittemore V, De Vries P, Ford J, Shah G, Cauwel H, Edrich P, Sahmoud T, Franz D, Khasraw M, Brown C, Ashley DM, Rosenthal MA, Jiang X, Mou YG, Chen ZP, Oh M, kim E, Chang J, Juratli TA, Kirsch M, Schackert G, Krex D, Gilbert MR, Wang M, Aldape KD, Stupp R, Hegi M, Jaeckle KA, Armstrong TS, Wefel JS, Won M, Blumenthal DT, Mahajan A, Schultz CJ, Erridge SC, Brown PD, Chakravarti A, Curran WJ, Mehta MP, Hofland KF, Hansen S, Sorensen M, Schultz H, Muhic A, Engelholm S, Ask A, Kristiansen C, Thomsen C, Poulsen HS, Lassen UN, Zalatimo O, Weston C, Zoccoli C, Glantz M, Rahmanuddin S, Shiroishi MS, Cen SY, Jones J, Chen T, Pagnini P, Go J, Lerner A, Gomez J, Law M, Ram Z, Wong ET, Gutin PH, Bobola MS, Alnoor M, Silbergeld DL, Rostomily RC, Chamberlain MC, Silber JR, Martha N, Jacqueline S, Thaddaus G, Daniel P, Hans M, Armin M, Eugen T, Gunther S, Hutterer M, Tseng HM, Zoccoli CM, Glantz M, Zalatimo O, Patel A, Rizzo K, Sheehan JM, Sumrall AL, Vredenburgh JJ, Desjardins A, Reardon DA, Friiedman HS, Peters KB, Taylor LP, Stewart M, Blondin NA, Baehring JM, Foote T, Laack N, Call J, Hamilton MG, Walling S, Eliasziw M, Easaw J, Shirsat NV, Kundar R, Gokhale A, Goel A, Moiyadi AA, Wang J, Mutlu E, Oyan A, Yan T, Tsinkalovsky O, Jacobsen HK, Talasila KM, Sleire L, Pettersen K, Miletic H, Andersen S, Mitra S, Weissman I, Li X, Kalland KH, Enger PO, Sepulveda J, Belda C, Balana C, Segura PP, Reynes G, Gil M, Gallego O, Berrocal A, Blumenthal DT, Sitt R, Phishniak L, Bokstein F, Philippe M, Carole C, Andre MDP, Marylin B, Olivier C, L'Houcine O, Dominique FB, Philippe M, Isabelle NM, Olivier C, Frederic F, Stephane F, Henry D, Marylin B, L'Houcine O, Dominique FB, Errico MA, Kunschner LJ, Errico MA, Kunschner LJ, Soffietti R, Trevisan E, Ruda R, Bertero L, Bosa C, Fabrini MG, Lolli I, Jalali R, Julka PK, Anand AK, Bhavsar D, Singhal N, Naik R, John S, Mathew BS, Thaipisuttikul I, Graber J, DeAngelis LM, Shirinian M, Fontebasso AM, Jacob K, Gerges N, Montpetit A, Nantel A, Albrecht S, Jabado N, Mammoser AG, Shah K, Conrad CA, Di K, Linskey M, Bota DA, Thon N, Eigenbrod S, Kreth S, Lutz J, Tonn JC, Kretzschmar H, Peraud A, Kreth FW, Muggeri AD, Alderuccio JP, Diez BD, Jiang P, Chao Y, Gallagher M, Kim R, Pastorino S, Fogal V, Kesari S, Rudnick JD, Bresee C, Rogatko A, Sakowsky S, Franco M, Hu J, Lim S, Lopez A, Yu L, Ryback K, Tsang V, Lill M, Steinberg A, Sheth R, Grimm S, Helenowski I, Rademaker A, Raizer J, Nunes FP, Merker V, Jennings D, Caruso P, Muzikansky A, Stemmer-Rachamimov A, Plotkin S, Spalding AC, Vitaz TW, Sun DA, Parsons S, Welch MR, Omuro A, DeAngelis LM, Omuro A, Beal K, Correa D, Chan T, DeAngelis L, Gavrilovic I, Nolan C, Hormigo A, Lassman AB, Kaley T, Mellinghoff I, Grommes C, Panageas K, Reiner A, Barradas R, Abrey L, Gutin P, Lee SY, Slagle-Webb B, Glantz MJ, Sheehan JM, Connor JR, Schlimper CA, Schlag H, Stoffels G, Weber F, Krueger DA, Care MM, Holland K, Agricola K, Tudor C, Byars A, Sahmoud T, Franz DN, Raizer J, Rice L, Rademaker A, Chandler J, Levy R, Muro K, Grimm S, Nayak L, Iwamoto FM, Rudnick JD, Norden AD, Omuro A, Kaley TJ, Thomas AA, Fadul CE, Meyer LP, Lallana EC, Colman H, Gilbert M, Alfred Yung WK, Aldape K, De Groot J, Conrad C, Levin V, Groves M, Loghin M, Chris P, Puduvalli V, Nagpal S, Feroze A, Recht L, Rangarajan HG, Kieran MW, Scott RM, Lew SM, Firat SY, Segura AD, Jogal SA, Kumthekar PU, Grimm SA, Avram M, Patel J, Kaklamani V, McCarthy K, Cianfrocca M, Gradishar W, Mulcahy M, Von Roenn J, Helenowski I, Rademaker A, Raizer J, Galanis E, Anderson SK, Lafky JM, Kaufmann TJ, Uhm JH, Giannini C, Kumar SK, Northfelt DW, Flynn PJ, Jaeckle KA, Buckner JC, Omar AI, Panageas KS, Iwamoto FM, Cloughesy TF, Aldape KD, Rivera AL, Eichler AF, Louis DN, Paleologos NA, Fisher BJ, Ashby LS, Cairncross JG, Roldan GB, Wen PY, Ligon KL, Schiff D, Robins HI, Rocque BG, Chamberlain MC, Mason WP, Weaver SA, Green RM, Kamar FG, Abrey LE, DeAngelis LM, Jhanwar SC, Rosenblum MK, Lassman AB, Delios A, Jakubowski A, DeAngelis L, Grommes C, Lassman AB, Theeler BJ, Melguizo-Gavilanes I, Shonka NA, Qiao W, Wang X, Mahajan A, Puduvalli V, Hashemi-Sadraei N, Bawa H, Rahmathulla G, Patel M, Elson P, Stevens G, Peereboom D, Vogelbaum M, Weil R, Barnett G, Ahluwalia MS, Alvord EC, Rockne RC, Rockhill JK, Mrugala MM, Rostomily R, Lai A, Cloughesy T, Wardlaw J, Spence AM, Swanson KR, Zadeh G, Alahmadi H, Wilson J, Gentili F, Lassman AB, Wang M, Gilbert MR, Aldape KD, Beumer JJ, Wright J, Takebe N, Puduvalli VK, Hormigo A, Gaur R, Werner-Wasik M, Mehta MP, Gupta AJ, Campos-Gines A, Le K, Arango C, Richards M, Landeros M, Juan H, Chang JH, Kim JS, Cho JH, Seo CO, Baldock AL, Rockne R, Canoll P, Born D, Yagle K, Swanson KR, Alexandru D, Bota D, Linskey ME, Nabeel S, Raval SN, Raizer J, Grimm S, Rice L, Rosenow J, Levy R, Bredel M, Chandler J, New PZ, Plotkin SR, Supko JG, Curry WT, Chi AS, Gerstner ER, Stemmer-Rachamimov A, Batchelor TT, Ahluwalia MS, Hashemi N, Rahmathulla G, Patel M, Chao ST, Peereboom D, Weil RJ, Suh JH, Vogelbaum MA, Stevens GH, Barnett GH, Corwin D, Holdsworth C, Stewart R, Rockne R, Swanson K, Graber JJ, Kaley T, Rockne RC, Anderson AR, Swanson KR, Jeyapalan S, Goldman M, Boxerman J, Donahue J, Elinzano H, Evans D, O'Connor B, Puthawala MY, Oyelese A, Cielo D, Blitstein M, Dargush M, Santaniello A, Constantinou M, DiPetrillo T, Safran H, Plotkin SR, Halpin C, Merker V, Barker FG, Maher EA, Ganji S, DeBerardinis R, Hatanpaa K, Rakheja D, Yang XL, Mashimo T, Raisanen J, Madden C, Mickey B, Malloy C, Bachoo R, Choi C, Ranjan T, Yono N, Zalatimo O, Zoccoli C, Glantz M, Han SJ, Sun M, Berger MS, Aghi M, Gupta N, Parsa AT. MEDICAL AND NEURO-ONCOLOGY. Neuro Oncol 2011. [DOI: 10.1093/neuonc/nor152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hayton T, Furby J, Smith KJ, Altmann DR, Brenner R, Chataway J, Hunter K, Tozer DJ, Miller DH, Kapoor R. Longitudinal changes in magnetisation transfer ratio in secondary progressive multiple sclerosis: data from a randomised placebo controlled trial of lamotrigine. J Neurol 2011; 259:505-14. [PMID: 21904901 DOI: 10.1007/s00415-011-6212-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2011] [Revised: 07/28/2011] [Accepted: 08/02/2011] [Indexed: 10/17/2022]
Abstract
Sodium blockade with lamotrigine is neuroprotective in animal models of central nervous system demyelination. This study evaluated the effect of lamotrigine on magnetisation transfer ratio (MTR), a putative magnetic resonance imaging measure of intact brain tissue, in a group of subjects with secondary progressive multiple sclerosis (MS). In addition, the utility of MTR measures for detecting change in clinically relevant pathology was evaluated. One hundred seventeen people attending the National Hospital for Neurology and Neurosurgery or the Royal Free Hospital, London, UK, were recruited into a double-blind, parallel-group trial. Subjects were randomly assigned by minimisation to receive lamotrigine (target dose 400 mg/day) or placebo for 2 years. Treating and assessing physicians and patients were masked to treatment allocation. Results of the primary endpoint, central cerebral volume, have been published elsewhere. Significant differences between the verum and placebo arms were seen in only two measures [normal appearing grey matter (NAGM) p = 0.036 and lesion peak height (PH) p = 0.004], and in both cases there was a greater reduction in MTR in the verum arm. Significant correlations were found of change in MS functional composite with all MTR measures except lesion and normal appearing white matter (NAWM) PH. However, the change in MTR measures over 2 years were small, with only NAGM mean (p = 0.001), lesion peak location (p = 0.11) and mean (p < 0.0001) changing significantly from baseline. These data did not show that lamotrigine was neuroprotective. The clinical correlation of MTR measures was consistent, but the responsiveness to change was limited.
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Kao PH, Lammers SR, Tian L, Hunter K, Stenmark KR, Shandas R, Qi HJ. A microstructurally driven model for pulmonary artery tissue. J Biomech Eng 2011; 133:051002. [PMID: 21599093 DOI: 10.1115/1.4002698] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A new constitutive model for elastic, proximal pulmonary artery tissue is presented here, called the total crimped fiber model. This model is based on the material and microstructural properties of the two main, passive, load-bearing components of the artery wall, elastin, and collagen. Elastin matrix proteins are modeled with an orthotropic neo-Hookean material. High stretch behavior is governed by an orthotropic crimped fiber material modeled as a planar sinusoidal linear elastic beam, which represents collagen fiber deformations. Collagen-dependent artery orthotropy is defined by a structure tensor representing the effective orientation distribution of collagen fiber bundles. Therefore, every parameter of the total crimped fiber model is correlated with either a physiologic structure or geometry or is a mechanically measured material property of the composite tissue. Further, by incorporating elastin orthotropy, this model better represents the mechanics of arterial tissue deformation. These advancements result in a microstructural total crimped fiber model of pulmonary artery tissue mechanics, which demonstrates good quality of fit and flexibility for modeling varied mechanical behaviors encountered in disease states.
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Hayton T, Furby J, Smith KJ, Altmann DR, Brenner R, Chataway J, Hunter K, Tozer DJ, Miller DH, Kapoor R. Clinical and imaging correlates of the multiple sclerosis impact scale in secondary progressive multiple sclerosis. J Neurol 2011; 259:237-45. [DOI: 10.1007/s00415-011-6151-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2011] [Accepted: 06/15/2011] [Indexed: 10/17/2022]
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Hunter K, Badwal J, Singh D, Fairbairn H, Shaharuddin MA, Muldoon E. Room for improvement--syphilis; knowledge and delayed diagnosis among sexual health clinic attendees. IRISH MEDICAL JOURNAL 2011; 104:103-105. [PMID: 21675090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Cases of early infectious syphilis are increasing in Ireland. A questionnaire distributed to sexual health clinic attendees assessed syphilis knowledge. A telephone survey in patients with secondary syphilis explored potential delays in diagnosis. 272 questionnaires were completed. 54% of respondents were male, 222 (81.6%) were Irish.31/268 (12%) who stated their sexual orientation were men who have sex with men (MSM). 226 (83%) had heard of syphilis. MSM had better knowledge compared to heterosexual males (p<0.05). Contact details were available for 60 patients with secondary syphilis. 37 patients were surveyed. 31/37 (84%) recalled symptoms prior to diagnosis, mean duration of symptoms 53 days (range 7-168). 23/37 (62%) reported consulting at least one physician before attending sexual health services. 12/23 (52%) were given an alternate or no diagnosis. Greater awareness of syphilis signs and symptoms is needed amongst patients and healthcare providers to prevent delayed diagnosis leading to ongoing transmission.
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Markey GC, Browne K, Hunter K, Hill AD. Clinical observed performance evaluation: a prospective study in final year students of surgery. ADVANCES IN HEALTH SCIENCES EDUCATION : THEORY AND PRACTICE 2011; 16:47-57. [PMID: 20571858 DOI: 10.1007/s10459-010-9240-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 05/27/2010] [Indexed: 05/29/2023]
Abstract
We report a prospective study of clinical observed performance evaluation (COPE) for 197 medical students in the pre-qualification year of clinical education. Psychometric quality was the main endpoint. Students were assessed in groups of 5 in 40-min patient encounters, with each student the focus of evaluation for 8 min. Each student had a series of assessments in a 25-week teaching programme. Over time, several clinicians from a pool of 16 surgical consultants and registrars evaluated each student by direct observation. A structured rating form was used for assessment data. Variance component analysis (VCA), internal consistency and inter-rater agreement were used to estimate reliability. The predictive and convergent validity of COPE in relation to summative OSCE, long case, and overall final examination was estimated. Median number of COPE assessments per student was 7. Generalisability of a mean score over 7 COPE assessments was 0.66, equal to that of an 8 × 7.5 min station final OSCE. Internal consistency was 0.88-0.97 and inter-rater agreement 0.82. Significant correlations were observed with OSCE performance (R = 0.55 disattenuated) and long case (R = 0.47 disattenuated). Convergent validity was 0.81 by VCA. Overall final examination performance was linearly related to mean COPE score with standard error 3.7%. COPE permitted efficient serial assessment of a large cohort of final year students in a real world setting. Its psychometric quality compared well with conventional assessments and with other direct observation instruments as reported in the literature. Effect on learning, and translation to clinical care, are directions for future research.
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Chataway J, Anderson V, Chan D, Frost C, Hunter K, Kallis C, Greenwood J, Schuerer N, Alsanousi A, Nicholas R. POI11 The MS-STAT trial: a phase II trial of high-dose simvastatin for secondary progressive multiple sclerosis: baseline trial profile. Journal of Neurology, Neurosurgery and Psychiatry 2010. [DOI: 10.1136/jnnp.2010.226340.152] [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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Barker CA, Chang M, Lassman AB, Beal K, Chan TA, Hunter K, Grisdale K, Ritterhouse M, Moustakas A, Iwamoto FM, Kreisl TN, Sul J, Kim L, Butman J, Albert P, Fine HA, Chamberlain MC, Alexandru D, Glantz MJ, Kim L, Chamberlain MC, Bota DA, Takahashi K, Ikeda N, Kajimoto Y, Miyatake S, Kuroiwa T, Iwamoto F, Lamborn K, Kuhn J, Wen P, Yung WKA, Gilbert M, Chang S, Lieberman F, Prados M, Fine H, Lu-Emerson C, Norden AD, Drappatz J, Quant EC, Ciampa AS, Doherty LM, LaFrankie DC, Wen PY, Sherman JH, Moldovan K, Yeoh HK, Starke BM, Pouratian N, Shaffrey ME, Schiff D, O'Connor PC, Kroon HA, Recht L, Montano N, Cenci T, Martini M, D'Alessandris QG, Banna GL, Maira G, De Maria R, Larocca LM, Pallini R, Kim CH, Yang MS, Cheong JH, Kim JM, Shonka N, Gilbert M, Alfred Yung WK, Piao Y, Liu J, Bekele N, Wen P, Chen A, Heymach J, de Groot J, Gilbert MR, Wang M, Aldape K, Sorensen AG, Mikkelsen T, Bokstein F, Woo SY, Chmura SJ, Choucair AK, Mehta M, Perez Segura P, Gil M, Balana C, Chacon I, Munoz J, Martin M, Flowers A, Salner A, Gaziel TB, Soerensen M, Hasselbalch B, Poulsen HS, Lassen U, Peyre M, Cartalat-Carel S, Meyronet D, Sunyach MP, Jouanneau E, Guyotat J, Jouvet A, Frappaz D, Honnorat J, Ducray F, Wagle N, Nghiemphu PL, Lai A, Cloughesy TF, Kairouz VF, Elias EF, Chahine GY, Comair YG, Dimassi H, Kamar FG, Parchman AJ, Nock CJ, Bartolomeo J, Norden AD, Drappatz J, Ciampa AS, Doherty LM, LaFrankie DC, Ruland S, Quant EC, Beroukhim R, Wen PY, Graber JJ, Lassman AB, Kaley T, Johnson DR, Kimmel DW, Burch PA, Cascino TL, Giannini C, Wu W, Buckner JC, Dirier A, Abacioglu U, Okkan S, Pak Y, Guney YY, Aksu G, Soyuer S, Oksuzoglu B, Meydan D, Zincircioglu B, Yumuk PF, Alco G, Keven E, Ucer AR, Tsung AJ, Prabhu SS, Shonka NA, Alistar AT, van den Bent M, Taal W, Sleijfer S, van Heuvel I, Smitt PAS, Bromberg JE, Vernhout I, Porter AB, Dueck AC, Karlin NJ, Hiramatsu R, Kawabata S, Miyatake SI, Kuroiwa T, Easson MW, Vicente MGH, Sahebjam S, Garoufalis E, Guiot MC, Muanza T, Del Maestro R, Kavan P, Smolin AV, Konev A, Nikolaeva S, Shamanskaya Y, Malysheva A, Strelnikov V, Vranic A, Prestor B, Pizem J, Popovic M, Khatua S, Finlay J, Nelson M, Gonzalez I, Bruggers C, Dhall G, Fu BD, Linskey M, Bota D, Walbert T, Puduvalli V, Ozawa T, Brennan CW, Wang L, Squatrito M, Sasayama T, Nakada M, Huse JT, Pedraza A, Utsuki S, Tandon A, Fomchenko EI, Oka H, Levine RL, Fujii K, Ladanyi M, Holland EC, Raizer J, Avram MJ, Kaklamani V, Cianfrocca M, Gradishar W, Helenowski I, McCarthy K, Mulcahy M, Rademaker A, Grimm S, Landolfi JC, Chen S, Peeraully T, Anthony P, Linendoll NM, Zhu JJ, Yao K, Mignano J, Pfannl R, Pan E, Vera-Bolanos E, Armstrong TS, Bekele BN, Gilbert MR, Alexandru D, Glantz MJ, Kim L, Chamberlain MC, Bota DA, Albrecht V, Juerchott K, Selbig J, Tonn JC, Schichor C, Sawale KB, Wolff J, Vats T, Ketonen L, Khasraw M, Kaley T, Panageas K, Reiner A, Goldlust S, Tabar V, Green RM, Woyshner EA, Cloughesy TF, Abe T, Morishige M, Shiqi K, Momii Y, Sugita K, Fukuyoshi Y, Kamida T, Fujiki M, Kobayashi H, Lavon I, Refael M, Zrihan D, Siegal T, Elias EF, Kairouz VF, Chahine GY, Comair YG, Dimassi H, Kamar FG, Tham CK, See SJ, Toh CK, Kang SH, Park KJ, Kim CY, Yu MO, Park CK, Park SH, Chung YG, Park KJ, Yu MO, Kang SH, Cho TH, Chung YG, Sasaki H, Sano K, Nariai T, Uchino Y, Kitamura Y, Ohira T, Yoshida K, Kirson ED, Wasserman Y, Izhaki A, Mordechovich D, Gurvich Z, Dbaly V, Vymazal J, Tovarys F, Salzberg M, Rochlitz C, Goldsher D, Palti Y, Ram Z, Gutin PH, Furuse M, Miyatake SI, Kawabata S, Kuroiwa T, Torcuator RG, Ibaoc K, Rafael A, Mariano M, Reardon DA, Peters K, Desjardins A, Sampson J, Vredenburgh JJ, Gururangan S, Friedman HS, Le Rhun E, Kotecki N, Zairi F, Baranzelli MC, Faivre-Pierret M, Dubois F, Bonneterre J, Arenson EB, Arenson JD, Arenson PK, Pierick M, Jensen W, Smith DB, Wong ET, Gautam S, Malchow C, Lun M, Pan E, Brem S, Raizer J, Grimm S, Chandler J, Muro K, Rice L, McCarthy K, Mrugala M, Johnston SK, Chamberlain M, Marosi C, Handisurya A, Kautzky-Willer A, Preusser M, Elandt K, Widhalm G, Dieckmann K, Torcuator RG, Opinaldo P, Chua E, Barredo C, Cuanang J, Grimm S, Phuphanich S, Recht LD, Rosenfeld SS, Chamberlain MC, Zhu JJ, Fadul CE, Swabb EA, Pope C, Beelen AP, Raizer JJ, Kim IH, Park CK, Han JH, Lee SH, Kim CY, Kim TM, Kim DW, Kim JE, Paek SH, Kim IA, Kim YJ, Kim JH, Nam DH, Rhee CH, Lee SH, Park BJ, Kim DG, Heo DS, Jung HW, Desjardins A, Peters KB, Vredenburgh JJ, Friedman HS, Reardon DA, Becker K, Baehring J, Hammond SN, Norden AD, Fisher DC, Wong ET, Cote GM, Ciampa AS, Doherty LM, Ruland SF, LaFrankie DC, Wen PY, Drappatz J, Brandes AA, Franceschi E, Tosoni A, Poggi R, Agati R, Bartolini S, Spagnolli F, Pozzati E, Marucci G, Ermani M, Taillibert S, Guillevin R, Dehais C, Bellanger A, Delattre JY, Omuro A, Taillibert S, Hoang-Xuan K, Barrie M, Guiu S, Chauffert B, Cartalat-Carel S, Taillandier L, Fabbro M, Laigre M, Guillamo JS, Geffrelot J, Rouge TDLM, Bonnetain F, Chinot O, Gil MJ, de las Penas R, Reynes G, Balana C, Perez-Segura P, Garcia-Velasco A, Gallego O, Herrero A, de Lucas CFC, Benavides M, Perez-Martin X, Mesia C, Martinez-Garcia M, Muggeri AD, Cervio A, Rojas M, Arakaki N, Sevlever GE, Diez BD, Muggeri AD, Cerrato S, Martinetto H, Diez BD, Peereboom DM, Brewer CJ, Suh JH, Chao ST, Parsons MW, Elson PJ, Vogelbaum MA, Sade B, Barnett GH, Shonka NA, Yung WKA, Bekele N, Gilbert MR, Kobyakov G, Absalyamova O, Amanov R, Rauschkolb PK, Drappatz J, Batchelor TT, Meyer LP, Fadul CE, Lallana EC, Nghiemphu PL, Kohanteb P, Lai A, Green RM, Cloughesy TF, Mrugala MM, Lee LK, Graham CA, Fink JR, Spence AM, Portnow J, Badie B, Liu X, Frankel P, Chen M, Synold TW, Al Jishi AA, Golan J, Polley MYC, Lamborn KR, Chang SM, Butowski N, Clarke JL, Prados M, Grommes C, Oxnard GR, Kris MG, Miller VA, Pao W, Lassman AB, Renfrow J, DeTroye A, Chan M, Tatter S, Ellis T, McMullen K, Johnson A, Mott R, Lesser GJ, Cavaliere R, Abrey LE, Mason WP, Lassman AB, Perentesis J, Ivy P, Villalona M, Nayak L, Fleisher M, Gonzalez-Espinoza R, Reiner A, Panageas K, Lin O, Liu CM, Deangelis LM, Omuro A, Taylor LP, Ammirati M, Lamki T, Zarzour H, Grecula J, Dudley RW, Kavan P, Garoufalis E, Guiot MC, Del Maestro RF, Maurice C, Belanger K, Moumdjian R, Dufresne S, Fortin C, Fortin MA, Berthelet F, Renoult E, Belair M, Rouleau D, Gallego O, Benavides M, Segura PP, Balana C, Gil MJG, Berrocal A, Reynes G, Garcia JL, Mazarico J, Bague S. Medical and Neuro-Oncology. Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Clarke JL, Ennis MM, Lamborn KR, Prados MD, Puduvalli VK, Penas-Prado M, Gilbert MR, Groves MD, Hess KR, Levin VA, de Groot J, Colman H, Conrad CA, Loghin ME, Hunter K, Yung WK, Chen C, Damek D, Liu A, Gaspar LE, Waziri A, Lillehei K, Kavanagh B, Finlay JL, Haley K, Dhall G, Gardner S, Allen J, Cornelius A, Olshefski R, Garvin J, Pradhan K, Etzl M, Goldman S, Atlas M, Thompson S, Hirt A, Hukin J, Comito M, Bertolone S, Torkildson J, Joyce M, Moertel C, Letterio J, Kennedy G, Walter A, Ji L, Sposto R, Dorris K, Wagner L, Hummel T, Drissi R, Miles L, Leach J, Chow L, Turner R, Gragert MN, Pruitt D, Sutton M, Breneman J, Crone K, Fouladi M, Friday BB, Buckner J, Anderson SK, Giannini C, Kugler J, Mazurczac M, Flynn P, Gross H, Pajon E, Jaeckle K, Galanis E, Badruddoja MA, Pazzi MA, Stea B, Lefferts P, Contreras N, Bishop M, Seeger J, Carmody R, Rance N, Marsella M, Schroeder K, Sanan A, Swinnen LJ, Rankin C, Rushing EJ, Hutchins LF, Damek DM, Barger GR, Norden AD, Lesser G, Hammond SN, Drappatz J, Fadul CE, Batchelor TT, Quant EC, Beroukhim R, Ciampa A, Doherty L, LaFrankie D, Ruland S, Bochacki C, Phan P, Faroh E, McNamara B, David K, Rosenfeld MR, Wen PY, Hammond SN, Norden AD, Drappatz J, Phuphanich S, Reardon D, Wong ET, Plotkin SR, Lesser G, Mintz A, Raizer JJ, Batchelor TT, Quant EC, Beroukhim R, Kaley TJ, Ciampa A, Doherty L, LaFrankie D, Ruland S, Smith KH, Wen PY, Chamberlain MC, Graham C, Mrugala M, Johnston S, Kreisl TN, Smith P, Iwamoto F, Sul J, Butman JA, Fine HA, Westphal M, Heese O, Warmuth-Metz M, Pietsch T, Schlegel U, Tonn JC, Schramm J, Schackert G, Melms A, Mehdorn HM, Seifert V, Geletneky K, Reuter D, Bach F, Khasraw M, Abrey LE, Lassman AB, Hormigo A, Nolan C, Gavrilovic IT, Mellinghoff IK, Reiner AS, DeAngelis L, Omuro AM, Burzynski SR, Weaver RA, Janicki TJ, Burzynski GS, Szymkowski B, Acelar SS, Mechtler LL, O'Connor PC, Kroon HA, Vora T, Kurkure P, Arora B, Gupta T, Dhamankar V, Banavali S, Moiyadi A, Epari S, Merchant N, Jalali R, Moller S, Grunnet K, Hansen S, Schultz H, Holmberg M, Sorensen MM, Poulsen HS, Lassen U, Reardon DA, Vredenburgh JJ, Desjardins A, Janney DE, Peters K, Sampson J, Gururangan S, Friedman HS, Jeyapalan S, Constantinou M, Evans D, Elinzano H, O'Connor B, Puthawala MY, Goldman M, Oyelese A, Cielo D, Dipetrillo T, Safran H, Anan M, Seyed Sadr M, Alshami J, Sabau C, Seyed Sadr E, Siu V, Guiot MC, Samani A, Del Maestro R, Bogdahn U, Stockhammer G, Mahapatra AK, Venkataramana NK, Oliushine VE, Parfenov VE, Poverennova IE, Hau P, Jachimczak P, Heinrichs H, Schlingensiepen KH, Shibui S, Kayama T, Wakabayashi T, Nishikawa R, de Groot M, Aronica E, Vecht CJ, Toering ST, Heimans JJ, Reijneveld JC, Batchelor T, Mulholland P, Neyns B, Nabors LB, Campone M, Wick A, Mason W, Mikkelsen T, Phuphanich S, Ashby LS, DeGroot JF, Gattamaneni HR, Cher LM, Rosenthal MA, Payer F, Xu J, Liu Q, van den Bent M, Nabors B, Fink K, Mikkelsen T, Chan M, Trusheim J, Raval S, Hicking C, Henslee-Downey J, Picard M, Reardon D, Kaley TJ, Wen PY, Schiff D, Karimi S, DeAngelis LM, Nolan CP, Omuro A, Gavrilovic I, Norden A, Drappatz J, Purow BW, Lieberman FS, Hariharan S, Abrey LE, Lassman AB, Perez-Larraya JG, Honnorat J, Chinot O, Catry-Thomas I, Taillandier L, Guillamo JS, Campello C, Monjour A, Tanguy ML, Delattre JY, Franz DN, Krueger DA, Care MM, Holland-Bouley K, Agricola K, Tudor C, Mangeshkar P, Byars AW, Sahmoud T, Alonso-Basanta M, Lustig RA, Dorsey JF, Lai RK, Recht LD, Reardon DA, Paleologos N, Groves M, Rosenfeld MR, Meech S, Davis T, Pavlov D, Marshall MA, Sampson J, Slot M, Peerdeman SM, Beauchesne PD, Faure G, Noel G, Schmitt T, Kerr C, Jadaud E, Martin L, Taillandier L, Carnin C, Desjardins A, Reardon DA, Peters KB, Herndon JE, Kirkpatrick JP, Friedman HS, Vredenburgh JJ, Nayak L, Panageas KS, Deangelis LM, Abrey LE, Lassman AB. Ongoing Clinical Trials. Neuro Oncol 2010. [DOI: 10.1093/neuonc/noq116.s9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hayhurst C, Bradley A, Forbes AB, Hunter K, Royal MD. Short communication: Genetic and nongenetic factors influencing Ostertagia ostertagi antibodies in UK Holstein-Friesian cattle. J Dairy Sci 2010; 93:2239-43. [PMID: 20412939 DOI: 10.3168/jds.2009-2477] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2009] [Accepted: 01/12/2010] [Indexed: 11/19/2022]
Abstract
The purpose of this study was to estimate and discuss the genetic variation, heritability, and effects of nongenetic factors on the ability of Holstein-Friesian cows to produce an immune response by producing IgG antibodies to Ostertagia ostertagi. Total IgG (IgG(1) and IgG(2)) antibody levels were determined using an ELISA and measured using optical density ratio (ODR=OD(sample) - OD(negative control)/OD(positive control) - OD(negative control)) from milk samples collected from 1,276 Holstein-Friesian cattle in 229 commercial dairy farms from 2002 to 2004 during their first (82%) and other (2 to 12) lactations. A sire (n=461) model was fitted to the ODR data using ASREML software, and variance components were estimated. The ability to produce O. ostertagi antibodies as measured by ODR had a heritability of 0.13+/-0.12, and both season of sample and herd had a significant effect on total IgG levels. To conclude, this study has ascertained that genetic variation is present in the ability of dairy cows to mount an immune response to the parasite O. ostertagi. Inasmuch as evidence exists that IgG is linked to protective immunity against the parasite via a reduction in its reproductive ability, this trait may be of potential interest to genetic selection programs as an aid to reduce the effect of O. ostertagi in dairy herds.
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Kao PH, Lammers SR, Hunter K, Stenmark KR, Shandas R, Qi HJ. Constitutive Modeling of Anisotropic Finite-Deformation Hyperelastic Behaviors of Soft Materials Reinforced by Tortuous Fibers. THE INTERNATIONAL JOURNAL OF STRUCTURAL CHANGES IN SOLIDS : MECHANICS AND APPLICATIONS 2010; 2:19-29. [PMID: 21822502 PMCID: PMC3150848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Many biological materials are composites composed of a soft matrix reinforced with stiffer fibers. These stiffer fibers may have a tortuous shape and wind through the soft matrix. At small material deformation, these fibers deform in a bending mode and contribute little to the material stiffness; at large material deformation, these fibers deform in a stretching mode and induce a stiffening effect in the material behavior. The transition from bending mode deformation to stretching mode deformation yields a characteristic J-shape stress-strain curve. In addition, the spatial distribution of these fibers may render the composite an anisotropic behavior. In this paper, we present an anisotropic finite-deformation hyperelastic constitutive model for such materials. Here, the matrix is modeled as an isotropic neo-Hookean material. "The behaviors of single tortuous fiber are represented by a crimped fiber model". The anisotropic behavior is introduced by a structure tensor representing the effective orientation distribution of crimped fibers. Parametric studies show the effect of fiber tortuosity and fiber orientation distribution on the overall stress-strain behaviors of the materials.
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Hunter K, Siddiqui T, Komolafe O, Chong D. Colonic perforation secondary to migrated biliary stent. Case report of an unusual complication, and literature review. Scott Med J 2010. [DOI: 10.1258/rsmsmj.55.1.57i] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Endoscopic stents are widely used to facilitate biliary drainage in hepatic, biliary and pancreatic conditions. Migration of the stent is a potentially serious complication. We report a case of migration of a biliary stent to the sigmoid colon at which point the stent perforated the colon and become lodged subcutaneously. The patient was managed successfully by local exploration to retrieve the stent without bowel resection. We also review the literature on complications caused by migrated biliary stents.
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Alkureishi LWT, Burak Z, Alvarez JA, Ballinger J, Bilde A, Britten AJ, Calabrese L, Chiesa C, Chiti A, de Bree R, Gray HW, Hunter K, Kovacs AF, Lassmann M, Leemans CR, Mamelle G, McGurk M, Mortensen J, Poli T, Shoaib T, Sloan P, Sorensen JA, Stoeckli SJ, Thomsen JB, Trifiro G, Werner J, Ross GL. Joint Practice Guidelines for Radionuclide Lymphoscintigraphy for Sentinel Node Localization in Oral/Oropharyngeal Squamous Cell Carcinoma. Ann Surg Oncol 2009; 16:3190-210. [PMID: 19795174 PMCID: PMC2766455 DOI: 10.1245/s10434-009-0726-8] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Indexed: 02/06/2023]
Abstract
Involvement of the cervical lymph nodes is the most important prognostic factor for patients with oral/oropharyngeal squamous cell carcinoma (OSCC), and the decision of whether to electively treat patients with clinically negative necks remains a controversial topic. Sentinel node biopsy (SNB) provides a minimally invasive method for determining the disease status of the cervical node basin, without the need for a formal neck dissection. This technique potentially improves the accuracy of histologic nodal staging and avoids overtreating three-quarters of this patient population, minimizing associated morbidity. The technique has been validated for patients with OSCC, and larger-scale studies are in progress to determine its exact role in the management of this patient population. This document is designed to outline the current best practice guidelines for the provision of SNB in patients with early-stage OSCC, and to provide a framework for the currently evolving recommendations for its use. Preparation of this guideline was carried out by a multidisciplinary surgical/nuclear medicine/pathology expert panel under the joint auspices of the European Association of Nuclear Medicine (EANM) Oncology Committee and the Sentinel European Node Trial (SENT) Committee.
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Dutta-Roy AK, Gordon MJ, Kelly C, Hunter K, Crosbie L, Knight-Carpentar T, Williams BC. Inhibitory effect of Ginkgo biloba extract on human platelet aggregation. Platelets 2009; 10:298-305. [PMID: 16801106 DOI: 10.1080/09537109975933] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
The effect of pure flavonoids and Gingko biloba extract (GBE) on human platelet aggregation was investigated. Most of the flavonoids and vitamin E did not affect platelet aggregation in platelet-rich plasma (PRP); however some of these flavonoids inhibited platelet aggregation in gel-filtered platelets (GFP). GBE inhibited both ADP- and collagen-induced platelet aggregation in PRP, GFP and in whole blood in a dose-dependent manner. GBE at very low concentrations inhibited whole blood aggregation induced by ADP compared with those used for PRP or GFP. Flavonoids and GBE decreased the production of TxA(2) induced by collagen and ADP in PRP. However, no correlation was observed between the inhibition of platelet aggregation and the decrease of TxA(2) synthesis. GBE and flavonoids did not affect platelet membrane fluidity. However, the incubation of PRP with GBE increased cAMP levels in platelets, which is known to inhibit platelet activation by lowering intracellular Ca2+ levels. GBE is a mixture of many compounds, including flavonoids and gingkoglides, which affect metabolism of cAMP, TxA(2) and Ca2+ in platelets. It is effective in the inhibition of platelet aggregation, both in PRP and whole blood, and thus may be potentially used as an effective oral anti-platelet therapeutic agent.
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Irwin N, McClean PL, Hunter K, Flatt PR. Metabolic effects of sustained activation of the GLP-1 receptor alone and in combination with background GIP receptor antagonism in high fat-fed mice. Diabetes Obes Metab 2009; 11:603-10. [PMID: 19515180 DOI: 10.1111/j.1463-1326.2009.01036.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
AIM Enzyme-resistant glucagon-like peptide-1 (GLP-1) receptor agonists and GIP receptor antagonists have been proposed to have therapeutic potential for the treatment of type 2 diabetes. Such benefits are based on actions mediated primarily through stimulation of insulin secretion or alleviation of insulin resistance respectively. This study examined the long-term actions of the stable GLP-1 receptor agonist (D-Ala(8))GLP-1 and the GIP receptor antagonist (Pro(3))GIP alone and in combination in high fat-fed mice. METHODS Mice on high-fat diet for 155 days were injected once daily with (D-Ala(8))GLP-1 or (Pro(3))GIP (25 nmol/kg body weight) for 24 days. In the following 24-day period, half of the (Pro(3))GIP-treated mice were administered an additional dose of (D-Ala(8))GLP-1 (25 nmol/kg body weight), while the remaining mice continued their original treatment regimes. RESULTS Daily intraperitoneal injections of (D-Ala(8))GLP-1 or (Pro(3))GIP restored glycaemic control to normal levels and significantly (p < 0.05) improved glucose tolerance compared with high-fat controls by day 24. Food intake and body weights were not affected. On day 48, all treatment groups displayed significantly improved glucose tolerance (p < 0.05) and insulin sensitivity (p < 0.001) compared with high-fat controls on day 48. HDL cholesterol levels were significantly increased in mice treated with (D-Ala(8))GLP-1 alone (p < 0.05) or in combination with (Pro(3))GIP (p < 0.01) compared with normal chow-fed controls. CONCLUSIONS These results illustrate efficacy of (Pro(3))GIP and (D-Ala(8))GLP-1 for treatment of glucose intolerance and insulin resistance caused by high-fat feeding. Combination therapy appeared to have little benefit over either treatment alone.
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Hayton T, Furby J, Smith KJ, Altmann DR, Brenner R, Chataway J, Hughes RAC, Hunter K, Tozer DJ, Miller DH, Kapoor R. Grey matter magnetization transfer ratio independently correlates with neurological deficit in secondary progressive multiple sclerosis. J Neurol 2009; 256:427-35. [PMID: 19271108 DOI: 10.1007/s00415-009-0110-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Revised: 09/03/2008] [Accepted: 09/24/2008] [Indexed: 10/21/2022]
Abstract
Although there is substantial brain grey matter pathology in secondary progressive multiple sclerosis (MS), there has been limited investigation of its contribution to disability.This study investigated the correlation of magnetization transfer ratio (MTR) measures taken from brain grey matter, normal appearing white matter (NAWM) and lesions with neurological deficit and disability in 113 people with secondary progressive MS. In order to adjust for the potential effects of focal white matter lesions and global brain atrophy, T2 lesion volume and normalized brain volume (NBV) were also calculated for each subject. Clinical measures included the expanded disability status scale (EDSS) and the multiple sclerosis functional composite (MSFC) scores. Linear regression analysis was used to assess the age- and gender-adjusted correlation of MTR histogram mean, peak height and peak location with the MSFC and individual component measures. Logistic regression analysis was used to determine whether imaging measures could be used to predict if subjects were in the higher disability group (EDSS > or = 6.5).Significant correlations were detected between MSFC composite and mean MTR in (i) normal appearing white matter (NAWM; r = 0.327, p < 0.0001), (ii) grey matter (r = 0.460, p < 0.0001) and (iii) lesions (r = 0.394, p < 0.0001). Although NBV and T2 lesion volume correlated significantly with MSFC, grey matter histogram mean emerged as the best predictor of MSFC score. None of the MRI measures significantly predicted higher EDSS.These results suggest that brain grey matter pathology plays an important role in determining neurological impairment. The apparent paucity of correlation between MRI measures and EDSS is likely to represent the relative insensitivity of the latter measure in this study group.
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95
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Dee A, Howell F, O'Connor C, Cremin S, Hunter K. Determining the cost of genital warts: a study from Ireland. Sex Transm Infect 2008; 85:402-3. [PMID: 19004863 DOI: 10.1136/sti.2008.033837] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVES To determine the average cost of a case of genital warts, for both males and females, with a view to informing the current debate as to which Human papillomavirus vaccine would have maximum cost-effectiveness in the Irish population. METHODS Contact time between patients and healthcare professionals was prospectively measured at five genitourinary medicine clinics in the south-west of Ireland, over a period of 3 weeks. By identifying all those with genital warts, it was possible to calculate the proportion of total time taken by patients with this condition, and from this to calculate a cost per incident case, by gender. RESULTS A total of 25.5% of attendances were for genital warts, and these patients used 26.2% of total clinic time (CI 25.4 to 27.0%). The average cost calculated for genital warts was 335 euros per incident case, and by gender 300 euros per male case and 366 euros per female case. CONCLUSIONS There are considerable costs associated with the treatment of genital warts, with female cases representing a higher cost than males. By vaccinating with the quadrivalent HPV vaccine, there are significant savings to be made.
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96
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Spantoveanu F, Hunter K. 260. Prospective Audit of Paraesthesia During Combined Spinal Epidural Anaesthesia for Patients Undergoing Elective Total Knee Replacement Surgery. Reg Anesth Pain Med 2008. [DOI: 10.1136/rapm-00115550-200809001-00099] [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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97
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Lammers SR, Kao PH, Qi HJ, Hunter K, Lanning C, Albietz J, Hofmeister S, Mecham R, Stenmark KR, Shandas R. Changes in the structure-function relationship of elastin and its impact on the proximal pulmonary arterial mechanics of hypertensive calves. Am J Physiol Heart Circ Physiol 2008; 295:H1451-9. [PMID: 18660454 DOI: 10.1152/ajpheart.00127.2008] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Extracellular matrix remodeling has been proposed as one mechanism by which proximal pulmonary arteries stiffen during pulmonary arterial hypertension (PAH). Although some attention has been paid to the role of collagen and metallomatrix proteins in affecting vascular stiffness, much less work has been performed on changes in elastin structure-function relationships in PAH. Such work is warranted, given the importance of elastin as the structural protein primarily responsible for the passive elastic behavior of these conduit arteries. Here, we study structure-function relationships of fresh arterial tissue and purified arterial elastin from the main, left, and right pulmonary artery branches of normotensive and hypoxia-induced pulmonary hypertensive neonatal calves. PAH resulted in an average 81 and 72% increase in stiffness of fresh and digested tissue, respectively. Increase in stiffness appears most attributable to elevated elastic modulus, which increased 46 and 65%, respectively, for fresh and digested tissue. Comparison between fresh and digested tissues shows that, at 35% strain, a minimum of 48% of the arterial load is carried by elastin, and a minimum of 43% of the change in stiffness of arterial tissue is due to the change in elastin stiffness. Analysis of the stress-strain behavior revealed that PAH causes an increase in the strains associated with the physiological pressure range but had no effect on the strain of transition from elastin-dominant to collagen-dominant behavior. These results indicate that mechanobiological adaptations of the continuum and geometric properties of elastin, in response to PAH, significantly elevate the circumferential stiffness of proximal pulmonary arterial tissue.
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98
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Barr E, Dungworth J, Hunter K, McFarlane M, Kubba H. The prevalence of ENT disorders in pre-school children with Down Syndrome. Clin Otolaryngol 2007. [DOI: 10.1111/j.1749-4486.2007.01568_6.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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99
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Lang E, Loughrey J, Hunter K, Rowley H. Ex utero intrapartum treatment (EXIT) procedure and simultaneous excision of oral teratoma. IRISH MEDICAL JOURNAL 2007; 100:632-633. [PMID: 18277735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report a case of a large oral teratoma in a foetus diagnosed on antenatal ultrasound. Due to the anticipated difficulty in securing the airway at birth an ex-utero intrapartum treatment (EXIT) procedure was planned. In this case simultaneous excision of the tumour mass was carried out while on placental support this allowed safe procurement of the airway and successful delivery of an otherwise healthy infant. This case highlights the challenge presented by such unusual cases and illustrates the successful treatment of this condition.
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100
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Irwin N, Hunter K, Flatt PR. Comparison of the metabolic effects of GIP receptor antagonism and PYY(3-36) receptor activation in high fat fed mice. Peptides 2007; 28:2192-8. [PMID: 17884253 DOI: 10.1016/j.peptides.2007.08.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Revised: 08/10/2007] [Accepted: 08/14/2007] [Indexed: 11/22/2022]
Abstract
Glucose-dependent insulinotropic polypeptide (GIP) and peptide YY (PYY) are secreted from the intestinal K- and L-cells, respectively, following a meal. Both peptides are believed to play a key role in glucose homeostasis and energy expenditure. This study investigated the effects of daily administration of the stable and specific GIP-R antagonist, (Pro(3))GIP (25 nmol/kg) and the endogenous truncated form of PYY, PYY(3-36) (50 nmol/kg), in mice fed with a high fat diet. Daily i.p. injection of (Pro(3))GIP, PYY(3-36) or combined peptide administration over 24 days significantly (P<0.05-0.01) decreased body weight compared with saline-treated controls without change in food intake. Plasma glucose levels and glucose tolerance were significantly (P<0.05) lowered by (Pro(3))GIP treatment alone, and in combination with PYY(3-36). These changes were accompanied by a slight improvement of insulin sensitivity in all of the treatment groups. (Pro(3))GIP treatment significantly reduced plasma corticosterone (P<0.05), while combined administration with PYY(3-36) significantly lowered serum glucagon (P<0.05). No appreciable changes were observed in either circulating or glucose-stimulated insulin secretion in all treatment groups. (Pro(3))GIP-treated mice had significantly (P<0.01) lowered fasting glucose levels and an improved (P<0.05) glycemic response to feeding. These comparative data indicate that chemical ablation of GIP receptor action using (Pro(3))GIP provides an especially effective means of countering obesity and related abnormalities induced by consumption of high fat energy rich diet.
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