101
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Han C, Nguyen K, Kim J, Pezner R, Schultheiss T, Wong J. SU-E-T-645: Radiobiologic Evaluation of Lung Toxicity in Treatment Plan Quality Comparisons for Hypofractionated Stereotactic Body Radiotherapy Using Relative Damaged Volume Modeling. Med Phys 2011. [DOI: 10.1118/1.3612608] [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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102
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Solanki D, Chandrasekaran N, Chodhry R, Cuprillnilson S, Desai S, Liberman B, Lee V, Lin Y, Nguyen K, Roughi L, Shah S, Sharma V, Thomas P, Janoff A, Keith E. Adhesion of lysozyme, albumin and transferrin to two types of FDA Group II contact lenses. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.928.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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103
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Zhao ZY, Khatri ND, Nguyen K, Song SQ, Sun L. Synthesis and mechanical properties of interconnected carbon nanofiber network reinforced polydimethylsiloxane composites. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2011; 11:1092-1097. [PMID: 21456144 DOI: 10.1166/jnn.2011.3074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Carbon nanofiber (CNF) reinforced elastomer composites with light weight, sustainability of large deformation, chemical stability, corrosion and fatigue resistance, and vibration and noise reduction capability can have positive impact on a wide range of applications. However, this type of composite is still a under studied research area due to the difficulties in material handling and processing. To improve processing control and reproducibility for large scale engineering applications, cost effective carbon nanofibers (CNFs) in form of interconnected porous network structure were used as nanofillers. Processing, microstructure and mechanical properties of carbon nanofibers reinforced polydimethylsiloxane (PDMS) have been studied. Mechanical measurements on the composites show that the CNF-PDMS interfacial bonding can be until failure, interfacial debonding happens in the CNF-PDMS composites and the resulted permanent deformation stabilizes with increasing load-unload cycles with significant energy dissipation.
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104
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Nguyen K, Liu A, Wong J. Prospective Analysis of Intra-fractional Motion for Patients Undergoing Fractionated Stereotactic Body Radiation Therapy (SBRT) using Helical Tomotherapy for Spinal Metastases. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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105
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Nguyen NH, VuTien P, Garcia RT, Trinh H, Nguyen H, Nguyen K, Levitt B, Nguyen MH. Response to pegylated interferon and ribavirin in Asian American patients with chronic hepatitis C genotypes 1 vs 2/3 vs 6. J Viral Hepat 2010; 17:691-7. [PMID: 20002562 DOI: 10.1111/j.1365-2893.2009.01226.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Chronic hepatitis C is generally underappreciated in Asian Americans, and most pivotal studies were conducted in western countries and only included a small numbers of Asian patients. Our goal was to examine and compare treatment outcomes in these patients with genotypes 1 vs 2/3 vs 6. We performed a retrospective cohort study of 167 consecutive treatment-naïve Asian American patients treated with pegylated interferon (PEG IFN) plus ribavirin (RBV) at two community clinics in Northern California from 12/00 to 1/08. Primary outcome was sustained virological response rate by intention-to-treat analysis. The overall completion rate was 76%, and treatment adherence (completion of ≥ 75-80% PEG IFN + RBV dose for ≥ 75-80% of intended duration) was 74%. Significant depression was noted in only 4% of patients. Sustained virologic response in patients with genotype 6 treated for 48 weeks was similar to that seen in those with genotype 2/3 (74%vs 75%, P = 0.89) and significantly higher than those with genotype 1 (74%vs 49%, P = 0.016). On multivariate analysis inclusive of sex, age, body mass index (≤ 25 vs > 25) and viral load, only treatment adherence and genotype (2/3 and 6 treated for 48 weeks) were found to be significant predictors of sustained virologic response. We conclude that significant depression is rare in Asian American patients (4%). Patients with genotype 6 treated for 48 weeks appear to have a similar treatment response rate as patients with genotype 2/3 and a significantly higher response rate than those with genotype 1.
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106
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Henry N, Rouach Y, Nguyen K, Verkarre V, Mejean A, Timsit MO. Particularités pronostiques, histopathologiques, génétiques et thérapeutiques du carcinome à cellules rénales tubulopapillaire. Prog Urol 2010; 20:393-401. [DOI: 10.1016/j.purol.2010.02.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Revised: 01/10/2010] [Accepted: 02/05/2010] [Indexed: 01/20/2023]
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107
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Cohn TE, Nguyen K. Turning it on piecemeal makes it seen faster. J Vis 2010. [DOI: 10.1167/2.7.232] [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] Open
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108
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Wein N, Krahn M, Courrier S, Bartoli M, Salort-Campana E, Nguyen K, Fernandez C, Pouget J, Fossat C, Depetris D, Leturcq F, Cau P, Levy N. Immunolabelling and flow cytometry as new tools to explore dysferlinopathies. Neuromuscul Disord 2009; 20:57-60. [PMID: 19854055 DOI: 10.1016/j.nmd.2009.08.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2009] [Revised: 07/03/2009] [Accepted: 08/10/2009] [Indexed: 11/19/2022]
Abstract
Dysferlinopathies are autosomal recessive muscular dystrophies caused by DYSF mutations, which lead to a reduced amount or a complete lack of dysferlin. One step in dysferlinopathies diagnosis consists in Western blot analysis of proteins extracted from muscle biopsy, or blood monocytes. We have taken advantage of dysferlin expression in monocytes to develop a whole blood flow cytometry (WBFC), using antibodies directed against dysferlin. Six patients were submitted to WBFC analysis and immunofluorescence analysis on monocytes. Results obtained are correlated to Western blot from monocytes and muscle biopsies. The possible usefulness of this flow cytometry analysis in routine diagnosis is presented.
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109
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Moy T, Conrad M, Rubio A, Silverman J, Nguyen K. P24 Characterization of the lysylphosphatidylglycerol synthetase MprF, an enzyme associated with reduced susceptibility to daptomycin. Int J Antimicrob Agents 2009. [DOI: 10.1016/s0924-8579(09)70243-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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110
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Krahn M, Wein N, Lostal W, Bourg-Alibert N, Nguyen K, Courrier S, Vial C, Labelle V, Petris DD, Borges A, Mattei M, Roudaut C, Miyake K, McNeil P, Cau P, Leturcq F, Bartoli M, Lévy N, Richard I. G.O.5 Partial functionality of a Mini-dysferlin molecule identified in a patient affected with moderately severe primary dysferlinopathy. Neuromuscul Disord 2008. [DOI: 10.1016/j.nmd.2008.06.198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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111
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La T, Filion E, Turnbull B, Chu J, Lee P, Nguyen K, Maxim P, Loo B, Graves E, Le Q. Metabolic Tumor Volume Predicts for Recurrence and Death in Head and Neck Cancer. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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112
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Nguyen K, Nadeau K. TSLP Directly Inhibits IL-10 Expression By Human Regulatory T Cells. J Allergy Clin Immunol 2008. [DOI: 10.1016/j.jaci.2008.01.039] [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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113
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Turchin I, Nguyen K, Menard HA. Cough, fever, joint pain and tender nodules: What is your call? CMAJ 2008; 178:151-2. [DOI: 10.1503/cmaj.071255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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114
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Nguyen K, Rincon JC, Bickel M. Association of strong premature contacts and tooth mobility using T-Scan. Aust Dent J 2007. [DOI: 10.1111/j.1834-7819.2007.tb06161.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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115
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Cheng J, Schultheiss T, Nguyen K, Wong J. Dose-Volume Response in Acute Gastrointestinal Injury of Prostate Cancer Patients Treated With Helical Tomotherapy. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.1457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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116
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Krahn M, Bernard R, Nguyen K, Labelle V, Bassez G, Figarella-Branger D, Pouget J, Di Salvo E, Hammouda E, Béroud C, Eymard B, Urtizberea J, Leturcq F, Lévy N. G.P.4.01 Mutational spectrum of the DYSF gene based on a large cohort of dysferlin deficient patients. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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117
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Nguyen K, Krieser D, Kerr D, Jolley D, Clooney M, Kelly AM. Is Parental Weight Estimation More Accurate Than Other Weight Estimation Methods for Children? Acad Emerg Med 2007. [DOI: 10.1197/j.aem.2007.03.949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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118
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Aubourg P, Krahn M, Bernard R, Nguyen K, Forzano O, Boccaccio I, Delague V, De Sandre-Giovannoli A, Pouget J, Depétris D, Mattei MG, Philip N, Lévy N. Assignment of a new congenital fibrosis of extraocular muscles type 3 (CFEOM3) locus, FEOM4, based on a balanced translocation t(2;13) (q37.3;q12.11) and identification of candidate genes. J Med Genet 2006; 42:253-9. [PMID: 15744040 PMCID: PMC1736008 DOI: 10.1136/jmg.2004.021899] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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119
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Nguyen K, Bourdin A, Vachier I, Mainprice B, Farce M, Godard P, Chanez P. 065 CC10 and TIMP1 levels in induced sputum of smokers who developed chronic airflow impairment. Rev Mal Respir 2005. [DOI: 10.1016/s0761-8425(05)92477-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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120
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Kariv I, Nieva J, McNeeley P, Nguyen K, Nerenberg M, Diver J, Bethel K, Saven A. Use of a moving optical gradient to determine ex vivo chemosensitivity of B- cell chronic lymphocytic leukemias (B-CLL). J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.2097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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121
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Nguyen K, Bourdin A, Barbotte E, Vachier I, Paganin F, Godard P, Bousquet J, Vignola A, Chanez P. 6 Facteurs de risque de mortalité dans une cohorte de 52 asthmatiques sévères suivis pendant 10 ans. Rev Mal Respir 2004. [DOI: 10.1016/s0761-8425(04)71632-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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122
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Nguyen K, Philip N, Suchet L, Azulay JP, Pouget J. Syndrome oculodentodigital révélé par une paraparésie spastique progressive. Rev Neurol (Paris) 2004; 160:83-5. [PMID: 14978398 DOI: 10.1016/s0035-3787(04)70851-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Oculodentodigital syndrome (ODD) is a rare congenital disorder which associates eyes and facial abnormalities, defects in teeth enamel and type III syndactyly. The causal genetic defect in this syndrome is still unknown. Some patients with ODD syndrome also manifest spastic paraparesis. In most cases, inheritance is autosomal dominant with variable clinical expression. Herein, we report on a patient with ODD syndrome, who was referred for evaluation of spastic paraplegia. Our observations show that ODD syndrome can be recognized in late adulthood and revealed by spastic paraplegia.
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123
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Duncan LW, Graham JH, Dunn DC, Zellers J, McCoy CW, Nguyen K. Incidence of Endemic Entomopathogenic Nematodes Following Application of Steinernema riobrave for Control of Diaprepes abbreviatus. J Nematol 2003; 35:178-186. [PMID: 19265992 PMCID: PMC2620623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
Control of Diaprepes abbreviatus by endemic and exotic entomopathogenic nematodes (EPN) was monitored during 2000-2001 in two citrus orchards in central Florida (Bartow and Poinciana). Caged sentinel insect larvae were buried beneath citrus trees for 7 days at 1 to 2-month intervals from April to October each year. At Bartow, the survey occurred in experimental plots that were (i) not treated with commercial EPN, (ii) treated twice annually since 1998 with commercially formulated Steinernema riobrave, or (iii) treated twice annually with S. riobrave and liquid fertilization (15 times/year) occurred in place of dry fertilizer (3 times/year) used in the other treatments. Four endemic EPN species, in addition to S. riobrave, were recovered from the sandy soil at Bartow: S. diaprepesi, Heterorhabditis zealandica, H. indica, and H. bacteriophora. Mean insect mortality in control plots was 39.4% (range = 13% to 74%), with seasonal maxima in May to July each year. Endemic EPN were recovered from 55% (range = 22% to 81%) of the cadavers each month. Total numbers of endemic EPN recovered in all plots during 2 years were directly related to the numbers of adult weevils (D. abbreviatus and Pachnaeus litus) captured in modified Tedder's traps and inversely related to recovery of S. riobrave. Insect mortality was higher and cadavers containing endemic EPN were more numerous in untreated control plots than in S. riobrave-treated plots, except during months in which S. riobrave was applied. In treated plots, endemic EPN were recovered from cadavers at twice the rate of S. riobrave. Suppression of endemic EPN in plots treated with S. riobrave, combined with inferior persistence by the introduced species, may have attenuated the net efficacy of S. riobrave against D. abbreviatus. In contrast, H. indica was the only endemic nematode recovered from the sandy clay loam soil at Poinciana, where the average mortality of D. abbreviatus was 12% (range 3% to 20%) and incidence of H. indica did not exceed 8%. Results of these surveys suggest that the regional patterns in the abundance and damage to citrus caused by D. abbreviatus in Florida are regulated by endemic EPN and other soilborne enemies of the weevil.
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Duncan LW, Dunn DC, Bague G, Nguyen K. Competition Between Entomopathogenic and Free-Living Bactivorous Nematodes in Larvae of the Weevil Diaprepes abbreviatus. J Nematol 2003; 35:187-193. [PMID: 19265993 PMCID: PMC2620622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
Field and laboratory experiments were conducted to determine the degree to which free-living, bactivorous nematodes (FLBN) are able to competitively displace entomopathogenic nematodes (EPN) from insect cadavers. Two hundred larvae of the insect Diaprepes abbreviatus were buried at regular intervals during 2 years in experimental plots that were untreated or treated twice annually with Steinernema riobrave. Larvae were recovered after 7 days, and nematodes emerging from cadavers during the next 30 days were identified. The monthly prevalence of FLBN was directly related to that of S. riobrave (r = 0.38; P = 0.001) but was not related to the prevalence of the endemic EPN, S. diaprepesi, Heterorhabditis zealandica, H. indica, or H. bacteriophora (r = 0.02; P = 0.80). In a second experiment, treatment of small field plots with S. riobrave increased the prevalence of insect cadavers in which only FLBN were detected compared to untreated controls (30% vs. 14%; P = 0.052), and increased numbers of FLBN per buried insect by more than 10-fold. In the laboratory, sand microcosms containing one D. abbreviatus larva were treated with (i) the FLBN, Pellioditis sp.; (ii) S. riobrave; (iii) S. riobrave + Pellioditis; or (iv) neither nematode. Insect mortality was higher in the presence of both nematodes (57%) than when S. riobrave was alone (42%) (P = 0.01). An average of 59.2 Pellioditis sp. g(-1) insect body weight emerged in the presence of S. riobrave, whereas 6.2 nematodes g(-1) insect were recovered in the absence of the EPN (P = 0.01). Pellioditis sp. reduced the number of S. riobrave per cadaver by 84%; (P = 0.03), and per available insect by 82% (P = 0.001), compared to S. riobrave alone. Population size of S. diaprepesi was not affected by Pellioditis sp. in experiments of the same design. Faster development (P = 0.05) and nutrient appropriation within the insect cadaver by S. diaprepesi compared to S. riobrave may increase the fitness of the former species to compete with Pellioditis sp. The results of these studies demonstrate the potential of FLBN to regulate population densities of EPN and to dampen estimates of EPN-induced mortality of insect pests in the field.
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Pringsheim T, Diksic M, Dobson C, Nguyen K, Hamel E. Selective decrease in serotonin synthesis rate in rat brainstem raphe nuclei following chronic administration of low doses of amitriptyline: an effect compatible with an anti-migraine effect. Cephalalgia 2003; 23:367-75. [PMID: 12780767 DOI: 10.1046/j.1468-2982.2003.00526.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The effects of chronic, low-dose amitriptyline on serotonin (5-HT) synthesis rate were measured in rat brain using autoradiography and the trapping of alpha-[14C]-methyl-L-tryptophan (alpha-[14C]-MTrp). Rats received amitriptyline (2 mg/kg per day) or saline via intraperitoneal osmotic minipumps for 21 days. Amitriptyline had no effect on any physiological parameters measured, or on free or total plasma tryptophan levels. However, amitriptyline exerted selective decreases of 15% and 17% (P < 0.001) in serotonin synthesis rates in the dorsal and median raphe nuclei, respectively. There was no reduction in any of the projection areas studied, including the cerebral cortex, hippocampus, thalamus, hypothalamus or striatum. The data suggest that chronic low doses of amitriptyline can lead to sustained 5-HT re-uptake inhibition selectively in the raphe nuclei, an effect compatible with tonic activation of 5-HT(1A) autoreceptors and inhibition of 5-HT synthesis. The failure of chronic amitriptyline treatment to affect 5-HT synthesis rate in the projection areas may ensure an adequate regulation of pain pathways implicated in migraine headache, an effect possibly related to amitriptyline anti-migraine efficacy.
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