126
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Vladescu I, Lieleg O, Jang S, Ribbeck K. An adsorption chromatography assay to probe bulk particle transport through hydrogels. J Pharm Sci 2011; 101:436-42. [PMID: 21905030 DOI: 10.1002/jps.22737] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 06/17/2011] [Accepted: 08/03/2011] [Indexed: 12/24/2022]
Abstract
Biopolymer-based hydrogels such as mucus and the basal lamina play a key role in biology, where they control the exchange of material between different compartments. They also pose a barrier that needs to be overcome for successful drug delivery. Characterizing the permeability properties of such hydrogels is mandatory for the development of suitable drug delivery vectors and pharmaceutics. Here, we present an experimental method to measure bulk particle transport through hydrogels. We validate our assay by applying it to mucin hydrogels and show that the permeability properties of these mucin hydrogels can be modulated by polymer density and pH, in agreement with previous results obtained from single particle tracking. The method we present here is easy to handle, inexpensive, and high-throughput compatible. It is also a suitable platform for the design and screening of drugs that aim at modifying the barrier properties of hydrogels. This system can also aid in the characterization and development of synthetic gels for a range of biomedical applications.
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Yoon HJ, Jang JY, Yoon JY, Kim HS, Lee SJ, Kim KH, Kim DJ, Jang S, Suh SW. Crystal structure of the TNF-α inducing protein (Tipα) from Helicobacter pylori: DNA docking study. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311088039] [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] Open
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128
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Jang S, McNeeley S, Lee S, Pyakuryal A, Hanley J. SU-E-T-487: TomoTherapy Plan Quality Metrics for Multiple Anatomical Sites. Med Phys 2011. [DOI: 10.1118/1.3612440] [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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129
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Luo J, Deitz N, Pantelic D, Cowling D, Jang S. SU-E-I-179: Evaluation of a SPECT Camera with CZT Detectors and Multipinhole Collimator for Nuclear Cardiology Imaging. Med Phys 2011. [DOI: 10.1118/1.3611753] [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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130
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Lee S, Hepel J, Mayo-Smith W, Curran B, Sio T, Jang S, Sternick E. SU-E-T-505: A Phantom Study of 4D-SBRT Lung Treatment with CyberKnife Using Novel Fiducial Markers. Med Phys 2011. [DOI: 10.1118/1.3612458] [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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131
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Georgiev G, Jang S, Hamilton R. SU-E-T-573: Monte Carlo Simulated Peripheral Doses in SRS of the Brain. Med Phys 2011. [DOI: 10.1118/1.3612535] [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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132
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Pyakuryal A, Pokhrel D, Jang S, Gopalakrishnan M, Sathiaseelan V, Mittal B. SU-E-T-823: Implication of the Spatial Resolution of the Conventional Dose-Volume Histogram Analysis in the Radiation Therapy Treatments. Med Phys 2011. [DOI: 10.1118/1.3612787] [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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133
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Jang S, Dukes B, Wilkinson N. SU-E-T-474: Long Term Variation of ExacTrac Image Isocenter and Evaluation of Congruence between EXACTRAC KV-Image Isocenter and Radiation Isocenter. Med Phys 2011. [DOI: 10.1118/1.3612428] [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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134
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Pyakuryal A, Pokhrel D, Gopalakrishnan M, Jang S, Luo J, Gocer E, Sathiaseelan V, Mittal B. SU-E-T-816: Application of the Histogram Analysis in Radiation Therapy (HART): An Open Source Software System. Med Phys 2011. [DOI: 10.1118/1.3612780] [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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135
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Jang S, Venna SS. Sun-protective behaviors, vitamin D, and skin cancer: A systematic review. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e19712] [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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136
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Gordon JD, Krafft SP, Jang S, Smith-Raymond L, Stevie MY, Hamilton RJ. Confidence limit variation for a single IMRT system following the TG119 protocol. Med Phys 2011; 38:1641-8. [PMID: 21520877 DOI: 10.1118/1.3555298] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To evaluate the robustness of TG119-based quality assurance metrics for an IMRT system. METHODS Four planners constructed treatment plans for the five IMRT test cases described in TG119. All plans were delivered to a 30 cm x 30 cm x 15 cm solid water phantom in one treatment session in order to minimize session-dependent variation from phantom setup, film quality, machine performance, etc. Composite measurements utilized film and an ionization chamber. Per-field measurements were collected using a diode array device at an effective depth of 5 cm. All data collected were analyzed using the TG119 specifications to determine the confidence limit values for each planner separately and then compared. RESULTS The mean variance of ion chamber measurements for each planner was within 1.7% of the planned dose. The resulting confidence limits were 3.13%, 1.98%, 3.65%, and 4.39%. Confidence limit values determined by composite film analysis were 8.06%, 13.4%, 9.30%, and 16.5%. Confidence limits from per-field measurements were 1.55%, 0.00%, 0.00%, and 2.89%. CONCLUSIONS For a single IMRT system, the accuracy assessment provided by TG119-based quality assurance metrics showed significant variations in the confidence limits between planners across all composite and per-field evaluations. This observed variation is likely due to the different levels of modulation between each planner's set of plans. Performing the TG119 evaluation using plans produced by a single planner may not provide an adequate estimation of IMRT system accuracy.
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Yasher KR, Liller K, Wong S, Jang S, Morris BJ, Konin JG. An analysis of volleyball injuries in female athletes in grades nine through twelve. Br J Sports Med 2011. [DOI: 10.1136/bjsm.2011.084558.37] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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138
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Yasher KR, Liller K, Wong S, Jang S, Morris BJ, Konin JG. Developing an injury tracking software system specific for volleyball: a case example. Br J Sports Med 2011. [DOI: 10.1136/bjsm.2011.084558.36] [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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139
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Jang S, Sio T, Lee S, Curran B, Noren G, Sternick E, Wazer D. Dosimetry of CyberKnife and Gamma Knife in Meningioma and Vestibular Schwannoma. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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140
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Sio T, Curran B, Jang S, Lee S, Norén G, Sternick E, Wazer D. A Dosimetric Comparison of Gamma Knife vs. CyberKnife in Patients with Brain Metastases. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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141
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Lee S, Jang S, Sio T, Segala J, Allard D, Curran B, Sternick E, Wazer D. Dosimetric Comparison of Radiosurgical Modalities using EDR Film: Gamma Knife vs. CyberKnife. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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142
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Liller KD, Morris B, Konin J, Jang S, Wong S, Thorson S. Analysis of Florida high school athlete's sports injury data for 2008-2009. Inj Prev 2010. [DOI: 10.1136/ip.2010.029215.16] [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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143
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Luo J, Jang S. SU-GG-J-132: Estimate Absorbed Dose Using Micro PET Imaging of Rat Brain Tumor with I-124 Infusion Followed by F-18 Injection. Med Phys 2010. [DOI: 10.1118/1.3468356] [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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144
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Watchman C, Jang S, Hamilton R. WE-E-203-05: Medical Physics Teaching Opportunites in an ITunes World. Med Phys 2010. [DOI: 10.1118/1.3469421] [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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145
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Jang S, Krafft S, Hamilton R, Watchman C, Nguyen N. SU-GG-T-172: Dosimetric Comparison of Low Dose Region (V5) for Tomotherapy versus Conventional IMRT Plans of Lung Cancer. Med Phys 2010. [DOI: 10.1118/1.3468562] [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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146
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Pyakuryal A, Kepka A, Gopalakrishnan M, Jang S, Sathiaseelan V, Mittal BB. SU-GG-T-141: Current Status of the Histogram Analysis in Radiation Therapy (HART): An Open-Source Software System. Med Phys 2010. [DOI: 10.1118/1.3468531] [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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147
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Gordon J, Krafft S, Jang S, Smith-Raymond L, Stevie M, Hamilton R. TU-E-BRB-04: Confidence Limit Variation for a Single System Following the TG119 Protocol. Med Phys 2010. [DOI: 10.1118/1.3469287] [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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148
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Xu Y, Watchman C, Krafft S, Jang S. SU-GG-T-607: Effect of CT Contrast Materials on Dose Calculations in Tomotherapy Planning System. Med Phys 2010. [DOI: 10.1118/1.3469008] [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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149
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Jang S, Chae Y, Majhail NS. Conflicts of interest in economic analyses presented at the American Society of Clinical Oncology Annual Meeting. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6014] [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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150
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Kim J, Hong Y, Lee J, Ryu M, Chang H, Jang S, Kim M, Yu C, Kim T. Association between deficient mismatch repair system and efficacy to irinotecan containing first-line chemotherapy in patients with sporadic metastatic colorectal cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.3579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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