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Choudhury A, Arthur C, Malik J, Mandall P, Taylor C, Alam N, Tran A, Livsey J, Elliott T, Davidson S, Logue J, Wylie J. Patient-reported Outcomes and Health-related Quality of Life in Prostate Cancer Treated with a Single Fraction of High Dose Rate Brachytherapy Combined with Hypofractionated External Beam Radiotherapy. Clin Oncol (R Coll Radiol) 2014; 26:661-7. [DOI: 10.1016/j.clon.2014.06.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 05/29/2014] [Accepted: 06/23/2014] [Indexed: 11/29/2022]
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152
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O'Connor-Semmes RL, Lin J, Hodge RJ, Andrews S, Chism J, Choudhury A, Nunez DJ. GSK2374697, a novel albumin-binding domain antibody (AlbudAb), extends systemic exposure of exendin-4: first study in humans--PK/PD and safety. Clin Pharmacol Ther 2014; 96:704-12. [PMID: 25238251 DOI: 10.1038/clpt.2014.187] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 08/29/2014] [Indexed: 11/10/2022]
Abstract
GSK2374697 is a genetically engineered fusion protein of a human domain antibody to exendin-4. This molecule binds with a high affinity to human serum albumin, creating a long-duration glucagon-like peptide-1 (GLP-1) receptor agonist. This study is the first evaluation of the albumin-binding domain antibody (AlbudAb) drug delivery platform in humans. The aim of this randomized clinical study was to determine the pharmacokinetics, pharmacodynamics, safety, and tolerability of GSK2374697. The pharmacokinetic profile was prolonged, with estimated half-lives ranging from 6 to 10 days. Postprandial glucose and insulin were reduced, and gastric emptying was delayed in healthy subjects, confirming anticipated GLP-1 receptor agonist pharmacology. The safety and tolerability were as expected for a potent GLP-1 agonist. Gradual titration of doses greatly improved tolerability. Rapid tolerance to nausea was observed. Study results support further investigation in type 2 diabetes and for weight loss.
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153
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Thompson C, Mayes S, Aitkenhead A, Logue J, Wylie J, Elliot P, Livsey J, Coyle C, Alam N, Tran A, Stratford J, Boylan C, Choudhury A. Simultaneous Cone Beam Computed Tomography (CBCT) Acquisition During Arc Radiation Therapy (SCART): A Comparison of Volume Delineation on Simultaneous and Standard CBCT in Prostate Radiation Therapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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154
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Sato H, Choudhury A, Ogata H, Katada Y, Kokeguchi S, Shiotani M. Exploring variations in the first and second cleavage stages of developing embryos using time-lapse imaging technique. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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155
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Thompson C, Anandadas C, Liptrot T, Sanderson B, Lyons J, Stratford J, Tran A, Alam N, Livsey J, Wylie J, Elliott P, Logue J, Choudhury A. Tolerability of Neoadjuvant Chemotherapy and Concurrent Chemoradiation Therapy With Gemcitabine in Muscle Invasive Bladder Cancer: Physician and Patient-Reported Outcomes. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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156
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Hunter BA, Eustace A, Irlam JJ, Valentine HR, Denley H, Oguejiofor KK, Swindell R, Hoskin PJ, Choudhury A, West CM. Expression of hypoxia-inducible factor-1α predicts benefit from hypoxia modification in invasive bladder cancer. Br J Cancer 2014; 111:437-43. [PMID: 24937673 PMCID: PMC4119984 DOI: 10.1038/bjc.2014.315] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 04/14/2014] [Accepted: 05/12/2014] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The addition of carbogen and nicotinamide (CON) to radiotherapy (RT) improves overall survival in invasive bladder cancer. We explored whether expression of the hypoxia marker hypoxia-inducible factor-1α (HIF-1α) alone or in combination with other markers predicted benefit from CON. METHODS A retrospective study was carried out using material from patients with high-grade invasive bladder carcinoma enrolled in the BCON phase III trial of RT alone or with CON (RT+CON). HIF-1α expression was studied in 137 tumours using tissue microarrays and immunohistochemistry. Data were available from other studies for carbonic anhydrase IX and glucose transporter 1 protein and gene expression and tumour necrosis. RESULTS Patients with high HIF-1α expression had improved 5-year local relapse-free survival with RT+CON (47%) compared with RT alone (21%; hazard ratio (HR) 0.48, 95% CI 0.26-0.8, P=0.02), no benefit was seen with low HIF-1α expression (HR 0.81, 95% CI 0.43-1.50, P=0.5). Combinations of markers including necrosis also predicted benefit but did not improve on prediction using necrosis alone. CONCLUSIONS HIF-1α may be used to predict benefit from CON in patients with bladder cancer but does not improve on use of necrosis.
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157
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Aitkenhead A, Hamlett L, Wood D, Choudhury A. SU-E-J-93: Parametrisation of Dose to the Mucosa of the Anterior Rectal Wall in Transrectal Ultrasound Guided High-Dose-Rate Brachytherapy of the Prostate. Med Phys 2014. [DOI: 10.1118/1.4888145] [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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158
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Mayes S, Hamlett L, Stratford J, Boylan C, Aitkenhead A, Choudhury A. Simultaneous Cone Beam Computed Tomography (CBCT) Acquisition during Volumetric Modulated Arc Therapy (VMAT): A Comparison of Volume Delineation and Organ Position on Simultaneous and Peri-radiotherapy CBCT. Clin Oncol (R Coll Radiol) 2014. [DOI: 10.1016/j.clon.2013.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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159
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Thompson C, Anandadas C, Stratford J, Lyons J, Elliott P, Livsey J, Logue J, Wylie J, Cowan R, Choudhury A. EP-1290: Neoadjuvant chemotherapy and chemoradiotherapy with gemcitabine in muscle invasive bladder cancer. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31408-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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160
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Walshaw R, Agarwal A, Swindell R, Logue J, Wylie J, Livsey J, Alam N, Elliott P, Dickinson P, Choudhury A. EP-1313: Predictors of outcome after radiotherapy post radical prostatectomy. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31431-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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161
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Choudhury A, Agarwal A, Swindell R, Logue J, Elliott P, Dickinson P, Livsey J, Wylie J, Walshaw R. EP-1332: Patient-reported outcomes with a validated LENT-SOMA questionnaire for radiotherapy following prostatectomy. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31450-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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162
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Minchell L, Whitehurst P, Faivre-Finn C, Bayman N, Choudhury A, Stratford J. PO-0988: Evaluation of set up margins and a correction protocol in radical radiotherapy for lung cancer. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31106-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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163
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Chauhan S, Bewley M, Stratford J, Davidson L, Choudhury A, Faivre –Finn C, Golby C. PO-0993: Free breathing stereotactic ablative body radiotherapy with isotropic margins: evaluation of current practice. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31111-7] [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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164
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Pai H, Mukherjee G, Bhattacharya S, Bhattacharya C, Bhattacharyya S, Bhattacharjee T, Chanda S, Rajbanshi S, Goswami A, Gohil MR, Kundu S, Ghosh TK, Banerjee K, Rana TK, Pandey R, Prajapati GK, Banerjee SR, Mukhopadhyay S, Pandit D, Pal S, Meena J, Mukhopadhyay P, Choudhury A. Identification of intruder πi13/2state in 197Tl. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20146602079] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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165
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Mcgeoch RJ, Choudhury A, Chan W, Sibbald M, Crooks N, Hatton R, Seidelin P, Overgaard C, Ivanov J, Dzavik V. Long term outcomes of PCI and CABG for isolated proximal LAD lesions: a real world comparison. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p2164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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166
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Mayes S, Hamlett L, Stratford J, Dickinson P, Livsey J, Faivre-Finn C, Boylan C, Choudhury A, Aitkenhead A. PO-0724: Comparison of volume delineation on simultaneous and standard cone beam CT images during arc radiotherapy (SCART). Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33030-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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167
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McPartlin A, Maille E, Hamlett L, Swindell R, Wylie J, Livsey J, Elliott P, Logue J, Aitkenhead A, Choudhury A. PD-0460: Hypofractionated prostate radiotherapy: Can biological equivalent dose volumes predict late rectal toxicity? Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)32766-3] [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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168
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Webster GJ, Stratford J, Rodgers J, Livsey JE, Macintosh D, Choudhury A. Comparison of adaptive radiotherapy techniques for the treatment of bladder cancer. Br J Radiol 2013; 86:20120433. [PMID: 23255547 PMCID: PMC4651060 DOI: 10.1259/bjr.20120433] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 10/02/2012] [Accepted: 10/10/2012] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE Day-to-day anatomical variations complicate bladder cancer radiotherapy treatment. This work quantifies the impact on target coverage and irradiated normal tissue volume for different adaptive strategies. METHODS 20 patients were retrospectively planned using different three-dimensional conformal radiotherapy treatment strategies for whole-bladder carcinoma: (i) "conventional" treatment used isotropic expansion of the clinical target volume (CTV) by 15 mm to the planning target volume (PTV) for daily treatment; (ii) "plan of the day" used daily volumetric on-treatment imaging [cone beam CT (CBCT)] to select from four available plans with varying superior PTV margins; (iii) "composite" strategies used on-treatment CBCTs from Fractions 1-3 to inform a composite CTV and adapted PTV (5- and 10-mm margins for composite 1 and composite 2, respectively) for subsequent treatment. Target coverage was evaluated from available CBCTs (the first three fractions then the minimum weekly thereafter), and the reduction in the irradiated volume (i.e. within the 95% isodose) was quantified. RESULTS Plan of the day improved target coverage (i.e. all of the bladder within the 95% isodose throughout the treatment) relative to conventional treatment (p=0.10), while no such benefit was observed with composite 2. Target coverage was reduced with composite 1 relative to conventional treatment. The mean irradiated volume was reduced by 17.2%, 35.0% and 14.6% relative to conventional treatment, for plan of the day, composite 1 and composite 2, respectively (p<0.01 in all cases). No parameters predictive of large changes in bladder volume later in the treatment were identified. CONCLUSIONS Adaptive techniques can maintain or improve target coverage while allowing for reduced irradiated volume and possibly reduced toxicity. The plan-of-the-day technique appeared to provide the optimal balance between target coverage and normal tissue sparing. ADVANCES IN KNOWLEDGE This study suggests that plan-of-the-day techniques will provide optimal outcomes for adaptive bladder radiotherapy.
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169
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Wang F, Choudhury A, Selzer M, Mukherjee R, Nestler B. Effect of solutal Marangoni convection on motion, coarsening, and coalescence of droplets in a monotectic system. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 86:066318. [PMID: 23368049 DOI: 10.1103/physreve.86.066318] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Indexed: 05/26/2023]
Abstract
In this paper, we study the effect of solutal Marangoni convection (SMC) on the microstructure evolution in a monotectic system, using the convective Cahn-Hilliard and Navier-Stokes equations with a capillary tensor contributed by the chemical concentration gradient. At first, we simulate the spontaneous motion of two distant droplets induced by SMC and compare our results with an analytical solution. We then compute the coalescence of two droplets in contact and coarsening of two distant droplets considering different sizes. We further study the influence of SMC on the evolution of phase separation processes inside the spinodal region for Fe-50 at %Sn and Fe-40 at %Sn alloys. In the former case, we rationalize our results using Fourier spectra and in the latter case, we compare the size distribution of droplets with the LSW theory.
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Choudhury A, Eustace A, Irlam J, Taylor J, Denley H, Ryder D, Rojas A, Hoskin P, West C. Tumor Necrosis Predicts Benefit From Hypoxia-modifying Therapy in High-Risk Bladder Cancer. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1108] [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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171
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Kotowycz M, Johnston K, Ivanov J, Asif N, Almoghairi A, Choudhury A, Nagy C, Sibbald M, Seidelin P, Barolet A, Overgaard C, Džavík V. 570 Predictors of Radial Artery Size in Patients Undergoing Cardiac Catheterization - Insights from the Good Radial Artery Size Prediction Study (GRASP). Can J Cardiol 2012. [DOI: 10.1016/j.cjca.2012.07.518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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172
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Kotowycz M, Choudhury A, Chan W, Freixa X, Morrison L, Osten M, Dzavík V, Overgaard C. 430 Characteristics and Predictors of Graft Failure in Patients Undergoing Percutaneous Coronary Intervention Within 1-Year of Coronary Artery Bypass Grafting Surgery. Can J Cardiol 2012. [DOI: 10.1016/j.cjca.2012.07.404] [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] Open
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173
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Wang F, Choudhury A, Strassacker C, Nestler B. Spinodal decomposition and droplets entrapment in monotectic solidification. J Chem Phys 2012; 137:034702. [DOI: 10.1063/1.4734485] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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174
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Boylan CJ, Marchant TE, Stratford J, Malik J, Choudhury A, Shrimali R, Rodgers J, Rowbottom CG. A megavoltage scatter correction technique for cone-beam CT images acquired during VMAT delivery. Phys Med Biol 2012; 57:3727-39. [PMID: 22617805 DOI: 10.1088/0031-9155/57/12/3727] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Kilovoltage cone-beam CT (kV CBCT) can be acquired during the delivery of volumetric modulated arc therapy (VMAT), in order to obtain an image of the patient during treatment. However, the quality of such CBCTs is degraded by megavoltage (MV) scatter from the treatment beam onto the imaging panel. The objective of this paper is to introduce a novel MV scatter correction method for simultaneous CBCT during VMAT, and to investigate its effectiveness when compared to other techniques. The correction requires the acquisition of a separate set of images taken during VMAT delivery, while the kV beam is off. These images--which contain only the MV scatter contribution on the imaging panel--are then used to correct the corresponding kV/MV projections. To test this method, CBCTs were taken of an image quality phantom during VMAT delivery and measurements of contrast to noise ratio were made. Additionally, the correction was applied to the datasets of three VMAT prostate patients, who also received simultaneous CBCTs. The clinical image quality was assessed using a validated scoring system, comparing standard CBCTs to the uncorrected simultaneous CBCTs and a variety of correction methods. Results show that the correction is able to recover some of the low and high-contrast signal to noise ratio lost due to MV scatter. From the patient study, the corrected CBCT scored significantly higher than the uncorrected images in terms of the ability to identify the boundary between the prostate and surrounding soft tissue. In summary, a simple MV scatter correction method has been developed and, using both phantom and patient data, is shown to improve the image quality of simultaneous CBCTs taken during VMAT delivery.
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175
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Boylan C, Marchant T, Stratford J, Rodgers J, Malik J, Choudhury A, Shrimali R, Rowbottom C. OC-0231 MEGAVOLTAGE X-RAY SCATTER CORRECTION FOR SIMULTANEOUS CONE-BEAM CT IMAGING DURING VMAT DELIVERY. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)70570-4] [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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