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Dang X, Shih H, Sharma R, Angwin-Kaerner DT, Lin K, Kapur S, Thyagarajapuram NR, Shi GH, Collins DS. Clinical Investigation of Large Volume Subcutaneous Delivery up to 25 mL for Lean and Non-Lean Subjects. Pharm Res 2024; 41:751-763. [PMID: 38443633 DOI: 10.1007/s11095-024-03683-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 02/24/2024] [Indexed: 03/07/2024]
Abstract
PURPOSE To evaluate the clinical feasibility and tolerability of large volume subcutaneous delivery at different injection depths for lean and non-lean subjects. METHODS A single-center, randomized, subject-blinded, crossover study in 62 healthy subjects was conducted to evaluate delivery of a 10-cP solution containing hyaluronic acid. Subjects were separated into lean and non-lean cohort by SC thickness. A syringe pump was used to study the effect of different volumes (5, 12, 25 mL) of a viscous placebo solution and needle lengths (6, 9 and 12 mm) delivered at 0.5 mL/min. RESULTS Across all treatments, injection sites were observed to have negligible leakage, ~34 kPa of back pressure, and VAS of mild pain with higher pain from needle insertion than during injection. While mild to moderate erythema was the most frequently reported ISR and edema was most prominent for 25 mL injections, all ISRs were resolved within 4 hours post injection. Subjects were unbothered by ISRs across all treatments and rated them as low distress scores (average 1.0-1.5 out of 6). CONCLUSION SC injection of 25 mL is feasible and tolerable using a low-pain formulation for abdomen injection irrespective of subcutaneous thickness and injection depths at a delivery rate of 0.5 mL/min.
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Affiliation(s)
- Xiangnan Dang
- Eli Lilly and Company, Cambridge, Massachusetts, 02142, United States of America
| | - Han Shih
- Eli Lilly and Company, Lilly Technology Center, Indianapolis, Indiana, 46221, United States of America.
| | - Rakesh Sharma
- Eli Lilly and Company, Lilly Capability Center India, Bangalore, 560103, Karnataka, India
| | | | - Kathleen Lin
- Eli Lilly and Company, Cambridge, Massachusetts, 02142, United States of America
| | - Shiven Kapur
- Eli Lilly and Company, Lilly Technology Center, Indianapolis, Indiana, 46221, United States of America
| | | | - Galen H Shi
- Eli Lilly and Company, Lilly Technology Center, Indianapolis, Indiana, 46221, United States of America
| | - David S Collins
- Eli Lilly and Company, Lilly Technology Center, Indianapolis, Indiana, 46221, United States of America
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2
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Cwintal M, Shih H, Idrissi Janati A, Gigliotti J. The effect of the COVID-19 pandemic on the diagnosis and progression of oral cancer. Int J Oral Maxillofac Surg 2024:S0901-5027(24)00036-5. [PMID: 38395689 DOI: 10.1016/j.ijom.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 01/21/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024]
Abstract
The COVID-19 pandemic placed a significant burden on healthcare resources, limiting care to emergent and essential services only. The objective of this study was to describe the effect of the COVID-19 pandemic on the diagnosis and progression of oral cancer lesions in Montreal, Canada. A retrospective analysis of health records was performed. Patients presenting for a new oncology consultation for an oral lesion suspicious for cancer between March 2018 and March 2022, within the Department of Oral and Maxillofacial Surgery of the McGill University Health Center, were included. Data was collected on sociodemographic characteristics, oral cancer risk behaviors of study participants, oral cancer delays, tumor characteristics, and clinical management. A total of 190 patients were included, 91 patients from the pre-pandemic period and 99 from the pandemic period. The demographic characteristics of the patients in the two periods were comparable. There was no significant difference in the patient, professional, or treatment delay between the two periods. There was a non-significant increase in pathologic tumor size during the pandemic, but the pathologic staging and postoperative outcomes were comparable to those of the pre-pandemic cohort. The results indicate that emergent care pathways for oral cancer treatment were efficiently maintained despite the pandemic shutdown of services.
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Affiliation(s)
- M Cwintal
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, QC, Canada
| | - H Shih
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, QC, Canada; Department of Oral and Maxillofacial Surgery, McGill University Health Centre, Montreal, QC, Canada
| | - A Idrissi Janati
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, QC, Canada; Department of Oral and Maxillofacial Surgery, McGill University Health Centre, Montreal, QC, Canada; The Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - J Gigliotti
- Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montreal, QC, Canada; Department of Oral and Maxillofacial Surgery, McGill University Health Centre, Montreal, QC, Canada.
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3
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Shih H, Chen KC. Response to the Letter to the Editor regarding "Gland-sparing neck dissection: oncological and functional outcomes in oral cancer patients". Int J Oral Maxillofac Surg 2023; 52:1107-1108. [PMID: 36868893 DOI: 10.1016/j.ijom.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 02/09/2023] [Accepted: 02/13/2023] [Indexed: 03/05/2023]
Affiliation(s)
- H Shih
- Department of Dentistry, Division of Oral and Maxillofacial Surgery, China Medical University Hospital, Taichung, Taiwan
| | - K-C Chen
- Division of Oral and Maxillofacial Surgery, Department of Stomatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; School of Dentistry, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Shih H, Huang JS, Huang TT, Wong TY, Chen MY, Chen KC. Gland-sparing neck dissection: oncological and functional outcomes in oral cancer patients. Int J Oral Maxillofac Surg 2023; 52:825-830. [PMID: 36517308 DOI: 10.1016/j.ijom.2022.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 11/21/2022] [Accepted: 11/25/2022] [Indexed: 12/14/2022]
Abstract
This study was performed to evaluate the subjective and objective functional outcomes of patients who had undergone submandibular gland-sparing neck dissection. All data were obtained from patients treated in a single hospital. Seventy-seven patients who had undergone complete submandibular gland sparing (CSGS) were included in the study. Cancer prognosis items were recorded. The subjective outcomes included patient self-evaluation of mouth dryness and the evaluation of the presence of saliva secretion following the application of digital pressure. Saliva scintigraphy served as the objective test. Self-reported xerostomia was compared between the CSGS patients and a control group of patients who had undergone unilateral submandibular gland removal (USGR; n = 74). In the CSGS group, local recurrence occurred in 3.8% of the 80 cancer sites, and neck recurrence occurred in 5.9% of neck dissection sites. Regarding the subjective measurements, 7.0% of the CSGS patients reported xerostomia and 91.9% demonstrated saliva secretion by digital pressure. Scintigraphy revealed actively secreting glands, with 42.9% of them showing normal gland function; none of the patients had severe xerostomia. The relative risk of dry mouth was significantly higher in the USGR patients than in the CSGS patients (P < 0.001). Submandibular gland sparing during neck dissection was found to result in satisfactory saliva secretion, with a relatively small risk of local or neck recurrence.
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Affiliation(s)
- H Shih
- Department of Dentistry, Division of Oral and Maxillofacial Surgery, China Medical University Hospital, Taichung, Taiwan
| | - J-S Huang
- Division of Oral and Maxillofacial Surgery, Department of Stomatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Dentistry, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - T-T Huang
- Division of Oral and Maxillofacial Surgery, Department of Stomatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Dentistry, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - T-Y Wong
- Division of Oral and Maxillofacial Surgery, Department of Stomatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Dentistry, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - M-Y Chen
- Division of Oral and Maxillofacial Surgery, Department of Stomatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Dentistry, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - K-C Chen
- Division of Oral and Maxillofacial Surgery, Department of Stomatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Dentistry, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Kirschner M, Topkara V, Ning Y, Kurlansky P, Kaku Y, Naka Y, Shih H, Yuzefpolskaya M, Colombo P, Sayer G, Uriel N, Takeda K. Comparing Long-Term Survival and Readmissions Between Heartmate 3 and Heart Transplant as Primary Treatment for Advanced Heart Failure. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Gumuser E, Sharif Z, Ho R, Allison J, Aitelli A, Bussiere M, Shih H, Mela T. Effect of proton radiation therapy on cardiovascular implantable electronic devices [CIED]. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
The number of cancer patients with CIED receiving radiotherapy has increased dramatically with improving life expectancy in both patients with cardiovascular disease and cancer. The advent of proton therapy adds new concern for potential malfunction in CIED devices, both due to significant neutron scatter and its use of strong magnets to focus radiation beams. Therefore, we aimed to assess the incidence of CIED malfunction secondary to proton therapy in this patient cohort.
Methods
We retrospectively analyzed patients with CIED undergoing proton therapy at our institute between 2011–2021. Each device was programmed pre-treatment and monitored post-treatment according to a special protocol developed in our centre. Treatments were prescribed to doses up to 70 Gy (RBE) and delivered using either passive-scattering or pencil beam techniques. Distances between the CIED and treated volumes ranged from 10–50 cm. We analyzed baseline patient demographics, CIED demographics, CIED outcomes pre-proton therapy as well as post-proton therapy including device reset and requirement for replacement, analyzing up to most recent check.
Results
Fifty-one patients with CIED underwent proton therapy during the study period. Estimated neutron dose ranged from 0.05–2.0 mSv/GyRBE for this patient cohort. Baseline demographics outlines in table 1. Of note 26/51 patients underwent proton therapy for ophthalmic malignancies, 6/51 for brain/skull malignancies. CIED comprised of 39 pacemakers and 12 implantable cardioverter defibrillators. Fourteen patients were pacemaker-dependent. Using 95% Confidence Interval, ventricular threshold, impedance, and amplitude, as well as atrial threshold and amplitude were unchanged, whereas atrial impedance measurements had a change pre- and post-proton therapy (Table 2). No patients had a device reset. One patient had a premature battery depletion three months post-radiotherapy for pancreatic cancer.
Conclusions
Our findings suggest that proton therapy does not significantly impact CIED function. Whilst caution remains as further data is accrued, close monitoring, particularly with the advent of remote monitoring, of these patients should be recommended.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- E Gumuser
- Massachusetts General Hospital - Harvard Medical School , Boston , United States of America
| | - Z Sharif
- Massachusetts General Hospital - Harvard Medical School , Boston , United States of America
| | - R Ho
- Massachusetts General Hospital - Harvard Medical School , Boston , United States of America
| | - J Allison
- Massachusetts General Hospital - Harvard Medical School , Boston , United States of America
| | - A Aitelli
- Massachusetts General Hospital - Harvard Medical School , Boston , United States of America
| | - M Bussiere
- Massachusetts General Hospital - Harvard Medical School , Boston , United States of America
| | - H Shih
- Massachusetts General Hospital - Harvard Medical School , Boston , United States of America
| | - T Mela
- Massachusetts General Hospital - Harvard Medical School , Boston , United States of America
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Mondellini G, Shih H, Ning Y, Ladanyi A, Antler K, Murphy J, Feldman V, Leahy N, Kim A, Naka Y, Sayer G, Uriel N, Kurlansky P, Takeda K, Yuzefpolskaya M, Colombo P. Impact of Race and Ethnicity on Readmissions After HeartMate 3 (HM3) Implantation. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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8
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Shih H, Mondellini G, Kurlansky P, Ning Y, Feldman V, Tiburcio M, Leahy N, Ladanyi A, Kim A, Naka Y, Sayer G, Uriel N, Colombo P, Yuzefpolskaya M, Takeda K. Frequency of Unplanned Hospital Readmissions and Impact on Survival in HeartMate3 (HM3) Patients. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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9
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Shih H, Ning Y, Kurlansky P, Melehy A, Kaku Y, Topkara V, Yuzefpolskaya M, Colombo P, Sayer G, Uriel N, Naka Y, Takeda K. Causes and Temporal Patterns of Hospital Readmissions after Implantation of the HeartMate 3 Left Ventricular Assist Device: A Comparison with HeartMate II. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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10
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Shih H, Chen C. 321 Severe Metabolic Acidosis Was Associated With Unfavorable Neurological Outcome in Patients With Out-of-Hospital Cardiac Arrest. Ann Emerg Med 2018. [DOI: 10.1016/j.annemergmed.2018.08.326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Chang Y, Chen C, Shih H, Chen W. 51 The Association Between Unexpected Cardiac Arrest and Crowding of Emergency Department. Ann Emerg Med 2018. [DOI: 10.1016/j.annemergmed.2018.08.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Shih H, Liu HY, Lin CC. Improving gelation efficiency and cytocompatibility of visible light polymerized thiol-norbornene hydrogels via addition of soluble tyrosine. Biomater Sci 2018; 5:589-599. [PMID: 28174779 DOI: 10.1039/c6bm00778c] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Hydrogels immobilized with biomimetic peptides have been used widely for tissue engineering and drug delivery applications. Photopolymerization has been among the most commonly used techniques to fabricate peptide-immobilized hydrogels as it offers rapid and robust peptide immobilization within a crosslinked hydrogel network. Both chain-growth and step-growth photopolymerizations can be used to immobilize peptides within covalently crosslinked hydrogels. A previously developed visible light mediated step-growth thiol-norbornene gelation scheme has demonstrated efficient crosslinking of hydrogels composed of an inert poly(ethylene glycol)-norbornene (PEGNB) macromer and a small molecular weight bis-thiol linker, such as dithiothreitol (DTT). Compared with conventional visible light mediated chain-polymerizations where multiple initiator components are required, step-growth photopolymerized thiol-norbornene hydrogels are more cytocompatible for the in situ encapsulation of radical sensitive cells (e.g., pancreatic β-cells). This contribution explored visible light based crosslinking of various bis-cysteine containing peptides with macromer 8-arm PEGNB to form biomimetic hydrogels suitable for in situ cell encapsulation. It was found that the addition of soluble tyrosine during polymerization not only significantly accelerated gelation, but also improved the crosslinking efficiency of PEG-peptide hydrogels as evidenced by a decreased gel point and enhanced gel modulus. In addition, soluble tyrosine drastically enhanced the cytocompatibility of the resulting PEG-peptide hydrogels, as demonstrated by in situ encapsulation and culture of pancreatic MIN6 β-cells. This visible light based thiol-norbornene crosslinking mechanism provides an attractive gelation method for preparing cytocompatible PEG-peptide hydrogels for tissue engineering applications.
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Affiliation(s)
- Han Shih
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Hung-Yi Liu
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Chien-Chi Lin
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA and Department of Biomedical Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN, USA.
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13
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Hu F, Hsu H, Shih H, Chen C, Chang C. CHANGING FROM APPROPRIATE TO INAPPROPRIATE URINARY CATHETER USE AMONG HOSPITALIZED OLDER PATIENTS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- F. Hu
- National Cheng Kung University Hospital, Tainan, Taiwan,
| | - H. Hsu
- National Cheng Kung University Hospital, Tainan, Taiwan,
| | - H. Shih
- National Cheng Kung University Hospital, Tainan, Taiwan,
| | - C. Chen
- Chang Jung Christian University, Tainan, Taiwan
| | - C. Chang
- National Cheng Kung University Hospital, Tainan, Taiwan,
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Kobayashi T, Truong A, Shih H, Doebel T, Voisin B, Woodring T, Sohn S, Kennedy E, Jo J, Moro K, Leonard W, Kong H, Nagao K. 604 Spatial heterogeneity and functional diversity of innate lymphoid cells in the skin. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Photopolymerized biomimetic hydrogels with adaptable properties have been widely used for cell and tissue engineering applications. As a widely adopted gel cross-linking method, photopolymerization provides experimenters on-demand and spatial-temporal controls in gelation kinetics. Long wavelength ultraviolet (UV) light initiated photopolymerization is among the most popular methods in the fabrication of cell-laden hydrogels owing to its rapid and relatively mild gelation conditions. The use of UV light, however, still causes concerns regarding its potential negative impacts on cells. Alternatively, visible light based photopolymerization can be used to cross-link cell-laden hydrogels. The majority of visible light based gelation schemes involve photoinitiator, co-initiator, and comonomer. This multicomponent initiation system creates added challenges for optimizing hydrogel formulations. Here, we report a co-initiator/comonomer-free visible light initiated thiol-norbornene photopolymerization scheme to prepare modular biomimetic hydrogels suitable for in situ cell encapsulation. Eosin-Y was used as the sole initiator to initiate modular gelation between synthetic macromers (e.g., thiolated poly(vinyl alcohol) or poly(ethylene glycol)) and functionalized extracellular matrices (ECMs) including norbornene-functionalized gelatin (GelNB) or thiolated hyaluronic acid (THA). These components are modularly cross-linked to afford bioinert (i.e., purely synthetic), bioactive (i.e., using gelatin), and biomimetic (i.e., using gelatin and hyaluronic acid) hydrogels. The stiffness of the hydrogels can be easily tuned without affecting the contents of the bioactive components. Furthermore, the use of naturally derived biomacromolecules (e.g., gelatin and HA) renders these hydrogels susceptible to enzyme-mediated degradation. In addition to demonstrating efficient and tunable visible light mediated gelation, we also utilized this biomimetic modular gelation system to formulate artificial tumor niche and to study the effects of cell density and gel modulus on the formation of pancreatic ductal adenocarcinoma (PDAC) spheroids.
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Affiliation(s)
- Han Shih
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Tanja Greene
- Department of Biomedical Engineering, Indiana University-Purdue University Indianapolis Indianapolis, IN 46202, USA
| | - Murray Korc
- Department of Medicine and Biochemistry & Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Indiana University Melvin and Bren Simon Cancer Center, Indianapolis, IN 46202, USA
| | - Chien-Chi Lin
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
- Department of Biomedical Engineering, Indiana University-Purdue University Indianapolis Indianapolis, IN 46202, USA
- Indiana University Melvin and Bren Simon Cancer Center, Indianapolis, IN 46202, USA
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Yan S, Depauw N, Flanz J, Adams J, Gorissen BL, Shih H, Bortfeld T, Lu H. SU-F-T-207: Does the Greater Flexibility of Pencil Beam Scanning Reduce the Need for a Proton Gantry? Med Phys 2016. [DOI: 10.1118/1.4956345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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17
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Geng C, Daartz J, Cheung K, Bussiere M, Shih H, Paganetti H, Schuemann J. SU-F-T-157: Physics Considerations Regarding Dosimetric Accuracy of Analytical Dose Calculations for Small Field Proton Therapy: A Monte Carlo Study. Med Phys 2016. [DOI: 10.1118/1.4956293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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18
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Smith J, Bible P, Baysac K, Shih H, Duverger O, Kellett M, Morasso M. 410 The application of ATAC-seq to murine keratinocytes in the elucidation of the role of DLX3 in epidermal differentiation. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
We report a dynamic hydrogel system with on-demand tunable matrix stiffness.
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Affiliation(s)
- Han Shih
- Weldon School of Biomedical Engineering
- Purdue University
- West Lafayette
- USA
| | - Chien-Chi Lin
- Weldon School of Biomedical Engineering
- Purdue University
- West Lafayette
- USA
- Department of Biomedical Engineering
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Shih H, Lin CC. Photoclick Hydrogels Prepared from Functionalized Cyclodextrin and Poly(ethylene glycol) for Drug Delivery and in Situ Cell Encapsulation. Biomacromolecules 2015; 16:1915-23. [PMID: 25996903 PMCID: PMC5450649 DOI: 10.1021/acs.biomac.5b00471] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Polymers or hydrogels containing modified cyclodextrin (CD) are highly useful in drug delivery applications, as CD is a cytocompatible amphiphilic molecule that can complex with a variety of hydrophobic drugs. Here, we designed modular photoclick thiol-ene hydrogels from derivatives of βCD and poly(ethylene glycol) (PEG), including βCD-allylether (βCD-AE), βCD-thiol (βCD-SH), PEG-thiol (PEGSH), and PEG-norbornene (PEGNB). Two types of CD-PEG hybrid hydrogels were prepared using radical-mediated thiol-ene photoclick reactions. Specifically, thiol-allylether hydrogels were formed by reacting multiarm PEGSH and βCD-AE, and thiol-norbornene hydrogels were formed by cross-linking βCD-SH and multiarm PEGNB. We characterized the properties of these two types of thiol-ene hydrogels, including gelation kinetics, gel fractions, hydrolytic stability, and cytocompatibility. Compared with thiol-allylether hydrogels, thiol-norbornene photoclick reaction formed hydrogels with faster gelation kinetics at equivalent macromer contents. Using curcumin, an anti-inflammatory and anticancer hydrophobic molecule, we demonstrated that CD-cross-linked PEG-based hydrogels, when compared with pure PEG-based hydrogels, afforded higher drug loading efficiency and prolonged delivery in vitro. Cytocompatibility of these CD-cross-linked hydrogels were evaluated by in situ encapsulation of radical sensitive pancreatic MIN6 β-cells. All formulations and cross-linking conditions tested were cytocompatible for cell encapsulation. Furthermore, hydrogels cross-linked by βCD-SH showed enhanced cell proliferation and insulin secretion as compared to gels cross-linked by either dithiothreitol (DTT) or βCD-AE, suggesting the profound impact of both macromer compositions and gelation chemistry on cell fate in chemically cross-linked hydrogels.
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Affiliation(s)
- Han Shih
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Chien-Chi Lin
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
- Department of Biomedical Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN, USA
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Affiliation(s)
- H. Shih
- Human-Computer Interaction Multimedia Laboratory; Department of Electrical Engineering; Yuan Ze University; Taoyuan Taiwan
- The Innovation Center for Big Data and Digital Convergence; Yuan Ze University; Taoyuan Taiwan
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Unkelbach J, Bussiere M, Shih H, Chapman P, Loeffler J. TH-EF-BRD-10: Spatiotemporal Dose Shaping to Achieve Uniform Fractionation in Healthy Tissues Along with Hypo-Fractionation in Targets. Med Phys 2015. [DOI: 10.1118/1.4926297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Wu C, Hsieh P, Fan Jiang J, Shih H, Chen C, Hu C. A positive bacterial culture from allograft bone at implantation does not correlate with subsequent surgical site infection. Bone Joint J 2015; 97-B:427-31. [DOI: 10.1302/0301-620x.97b3.34600] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Fresh-frozen allograft bone is frequently used in orthopaedic surgery. We investigated the incidence of allograft-related infection and analysed the outcomes of recipients of bacterial culture-positive allografts from our single-institute bone bank during bone transplantation. The fresh-frozen allografts were harvested in a strict sterile environment during total joint arthroplasty surgery and immediately stored in a freezer at -78º to -68º C after packing. Between January 2007 and December 2012, 2024 patients received 2083 allografts with a minimum of 12 months of follow-up. The overall allograft-associated infection rate was 1.2% (24/2024). Swab cultures of 2083 allografts taken before implantation revealed 21 (1.0%) positive findings. The 21 recipients were given various antibiotics at the individual orthopaedic surgeon’s discretion. At the latest follow-up, none of these 21 recipients displayed clinical signs of infection following treatment. Based on these findings, we conclude that an incidental positive culture finding for allografts does not correlate with subsequent surgical site infection. Additional prolonged post-operative antibiotic therapy may not be necessary for recipients of fresh-frozen bone allograft with positive culture findings. Cite this article: Bone Joint J 2015;97-B:427–31.
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Affiliation(s)
- C. Wu
- Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - P. Hsieh
- Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | | | - H. Shih
- Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - C. Chen
- Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - C. Hu
- Chang Gung Memorial Hospital, Taoyuan, Taiwan
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Abstract
Thiol-norbornene (thiol-ene) photo-click hydrogels have emerged as a diverse material system for tissue engineering applications. These hydrogels are cross-linked through light mediated orthogonal reactions between multi-functional norbornene-modified macromers (e.g., poly(ethylene glycol), hyaluronic acid, gelatin) and sulfhydryl-containing linkers (e.g., dithiothreitol, PEG-dithiol, bis-cysteine peptides) using low concentration of photoinitiator. The gelation of thiol-norbornene hydrogels can be initiated by long-wave UV light or visible light without additional co-initiator or co-monomer. The cross-linking and degradation behaviors of thiol-norbornene hydrogels are controlled through material selections, whereas the biophysical and biochemical properties of the gels are easily and independently tuned owing to the orthogonal reactivity between norbornene and thiol moieties. Uniquely, the cross-linking of step-growth thiol-norbornene hydrogels is not oxygen-inhibited, therefore the gelation is much faster and highly cytocompatible compared with chain-growth polymerized hydrogels using similar gelation conditions. These hydrogels have been prepared as tunable substrates for 2D cell culture, as microgels or bulk gels for affinity-based or protease-sensitive drug delivery, and as scaffolds for 3D cell culture. Reports from different laboratories have demonstrated the broad utility of thiol-norbornene hydrogels in tissue engineering and regenerative medicine applications, including valvular and vascular tissue engineering, liver and pancreas-related tissue engineering, neural regeneration, musculoskeletal (bone and cartilage) tissue regeneration, stem cell culture and differentiation, as well as cancer cell biology. This article provides an up-to-date overview on thiol-norbornene hydrogel cross-linking and degradation mechanisms, tunable material properties, as well as the use of thiol-norbornene hydrogels in drug delivery and tissue engineering applications.
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Affiliation(s)
- Chien-Chi Lin
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, IN. 46202, USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN. 47907, USA
| | - Chang Seok Ki
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, IN. 46202, USA
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul. 151-742 Republic of Korea
| | - Han Shih
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, IN. 46202, USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN. 47907, USA
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Shih H, Mirmira RG, Lin CC. Visible light-initiated interfacial thiol-norbornene photopolymerization for forming islet surface conformal coating. J Mater Chem B 2015; 3:170-175. [PMID: 26509035 DOI: 10.1039/c4tb01593b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A cytocompatible visible light-mediated interfacial thiol-norbornene photopolymerization scheme was developed for creating hydrogel conformal coating on pancreatic islets. The step-growth thiol-norbornene reaction affords high consistency and tunability in gel coating thickness. Furthermore, isolated islets coated with thiol-norbornene gel maintained their viability and function in vitro.
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Affiliation(s)
- Han Shih
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Raghavendra G Mirmira
- Departments of Pediatrics, Medicine, Cellular and Integrative Physiology, and Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Chien-Chi Lin
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA. ; Department of Biomedical Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN, USA
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Chang KC, Chuang TL, Ji WF, Chang CH, Peng YY, Shih H, Hsu CL, Yeh JM, Tang WC, Su YC. UV-curable nanocasting technique to prepare bioinspired superhydrophobic organic-inorganic composite anticorrosion coatings. EXPRESS POLYM LETT 2015. [DOI: 10.3144/expresspolymlett.2015.15] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Shih H, Sherman J, Nachtigall L, Colvin M, Fullerton B, Winrich B, Batchelor T, Thornton L, Daartz J, Mancuso S, Oh K, Curry W, Loeffler J, Yeap B. AT-52 * PROSPECTIVE EARLY RESULTS OF LOW GRADE GLIOMA PATIENTS TREATED WITH PROTON THERAPY. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou237.51] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hao Y, Shih H, Muňoz Z, Kemp A, Lin CC. Visible light cured thiol-vinyl hydrogels with tunable degradation for 3D cell culture. Acta Biomater 2014; 10:104-14. [PMID: 24021231 DOI: 10.1016/j.actbio.2013.08.044] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 08/05/2013] [Accepted: 08/29/2013] [Indexed: 10/26/2022]
Abstract
We report here a synthetically simple yet highly tunable and diverse visible light mediated thiol-vinyl gelation system for fabricating cell-instructive hydrogels. Gelation was achieved via a mixed-mode step-and-chain-growth photopolymerization using functionalized 4-arm poly(ethylene glycol) as backbone macromer, eosin-Y as photosensitizer, and di-thiol containing molecule as dual purpose co-initiator/cross-linker. N-vinylpyrrolidone (NVP) was used to accelerate gelation kinetics and to adjust the stiffness of the hydrogels. Visible light (wavelength: 400-700 nm) was used to initiate rapid gelation (gel points: ~20s) that reached completion within a few minutes. The major differences between current thiol-vinyl gelation and prior visible light mediated photopolymerization are that: (1) the co-initiator triethanolamine (TEA) used in the previous systems was replaced with multifunctional thiols and (2) mixed-mode polymerized gels contain less network heterogeneity. The gelation kinetics and gel properties at the same PEG macromer concentration could be tuned by changing the identity of vinyl groups and di-thiol cross-linkers, as well as concentration of cross-linker and NVP. Specifically, acrylate-modified PEG afforded the fastest gelation rate, followed by acrylamide and methacrylate-functionalized PEG. Increasing NVP concentration also accelerated gelation and led to a higher network cross-linking density. Further, increasing di-thiol peptide concentration in the gel formulation increased hydrogel swelling and decreased gel stiffness. Due to the formation of thiol-ether-ester bonds following thiol-acrylate reaction, the gels degraded hydrolytically following a pseudo first order degradation kinetics. Degradation rate was controlled by adjusting thiol or NVP content in the polymer precursor solution. The cytocompatibility and utility of this hydrogel system were evaluated using in situ encapsulation of human mesenchymal stem cells (hMSC). Encapsulated hMSCs remained alive (>90%) throughout the duration of the study and the cells were differentiated down osteogenic lineage with varying degrees by controlling the rate and mode of gel degradation.
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Abstract
Gelatin-norbornene was synthesized for preparing cytocompatible and tunable covalent gelatin hydrogels via an orthogonal step-growth thiol–ene photoclick reaction.
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Affiliation(s)
- Zachary Mũnoz
- Department of Biomedical Engineering
- Purdue School of Engineering & Technology
- Indiana University-Purdue University Indianapolis
- Indianapolis, USA
| | - Han Shih
- Department of Biomedical Engineering
- Purdue School of Engineering & Technology
- Indiana University-Purdue University Indianapolis
- Indianapolis, USA
- Weldon School of Biomedical Engineering
| | - Chien-Chi Lin
- Department of Biomedical Engineering
- Purdue School of Engineering & Technology
- Indiana University-Purdue University Indianapolis
- Indianapolis, USA
- Weldon School of Biomedical Engineering
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Hamamura K, Zhang P, Zhao L, Shim JW, Chen A, Dodge TR, Wan Q, Shih H, Na S, Lin CC, Sun HB, Yokota H. Knee loading reduces MMP13 activity in the mouse cartilage. BMC Musculoskelet Disord 2013; 14:312. [PMID: 24180431 PMCID: PMC3924329 DOI: 10.1186/1471-2474-14-312] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 10/18/2013] [Indexed: 11/17/2022] Open
Abstract
Background Moderate loads with knee loading enhance bone formation, but its effects on the maintenance of the knee are not well understood. In this study, we examined the effects of knee loading on the activity of matrix metalloproteinase13 (MMP13) and evaluated the role of p38 MAPK and Rac1 GTPase in the regulation of MMP13. Methods Knee loading (0.5–3 N for 5 min) was applied to the right knee of surgically-induced osteoarthritis (OA) mice as well as normal (non-OA) mice, and MMP13 activity in the femoral cartilage was examined. The sham-loaded knee was used as a non-loading control. We also employed primary non-OA and OA human chondrocytes as well as C28/I2 chondrocyte cells, and examined MMP13 activity and molecular signaling in response to shear at 2–20 dyn/cm2. Results Daily knee loading at 1 N for 2 weeks suppressed cartilage destruction in the knee of OA mice. Induction of OA elevated MMP13 activity and knee loading at 1 N suppressed this elevation. MMP13 activity was also increased in primary OA chondrocytes, and this increase was attenuated by applying shear at 10 dyn/cm2. Load-driven reduction in MMP13 was associated with a decrease in the phosphorylation level of p38 MAPK (p-p38) and NFκB (p-NFκB). Molecular imaging using a fluorescence resonance energy transfer (FRET) technique showed that Rac1 activity was reduced by shear at 10 dyn/cm2 and elevated by it at 20 dyn/cm2. Silencing Rac1 GTPase significantly reduced MMP13 expression and p-p38 but not p-NFκB. Transfection of a constitutively active Rac1 GTPase mutant increased MMP13 activity, while a dominant negative mutant decreased it. Conclusions Knee loading reduces MMP13 activity at least in part through Rac1-mediated p38 MAPK signaling. This study suggests the possibility of knee loading as a therapy not only for strengthening bone but also preventing tissue degradation of the femoral cartilage.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Hiroki Yokota
- Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, SL220C, 723 West Michigan Street, Indianapolis, IN 46202, USA.
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Ki CS, Shih H, Lin CC. Effect of 3D matrix compositions on the efficacy of EGFR inhibition in pancreatic ductal adenocarcinoma cells. Biomacromolecules 2013; 14:3017-26. [PMID: 23889305 DOI: 10.1021/bm4004496] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Therapeutics to inhibit signaling of epidermal growth factor receptor (EGFR) has been suggested as a potential treatment for pancreatic cancers, and two-dimensional (2D) cell culture techniques are commonly used to identify and/or verify the therapeutic efficacy of EGFR inhibitors. However, drug targets identified from conventional cell culture techniques may not exhibit desired functions when these drugs are tested in animal studies, in large part due to the complicated tumor microenvironments. Hence, it is crucial to develop a biomimetic cell culture system capable of recapitulating aspects of tumor niches for studying cancer cell fate processes under the influence of various environmental stimuli. In this study, we utilized a versatile PEG-peptide hydrogel system to demonstrate the influence of matrix properties and EGFR inhibition on the growth of a pancreatic ductal adenocarcinoma cell line (PANC-1). PANC-1 cells were encapsulated in 8-arm PEG-norbornene (PEG8NB) hydrogels cross-linked by matrix metalloproteinase (MMP) sensitive peptide (MMP(Linker)) using thiol-ene photoclick chemistry. In soft hydrogels (G' ~ 2 kPa), cells retained high initial viability and formed clusters after prolonged culture, whereas cells encapsulated in stiff hydrogels (G' ~ 12 kPa) exhibited lower initial viability and reduced proliferation. While the immobilization of an EGFR peptide inhibitor, Asn-Tyr-Gln-Gln-Asn or NYQQN, in soft hydrogels did not cause cell death, this peptide induced significant cell apoptosis when immobilized in stiff hydrogels. Western blotting results showed that cell death was due to reduced expression of EGFR and Akt in stiff hydrogels under the influence of immobilized NYQQN peptide. These results shed light on the importance and non-negligible role of matrix properties on the efficacy of antitumor drugs.
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Affiliation(s)
- Chang Seok Ki
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana 46202, United States
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Zhu M, Warmerdam G, Steininger P, Neuner M, Sharp G, Shih H, Winey B. SU-E-J-22: Implementation and Validation of a 2D-3D Rigid Registration Algorithm for Proton Gantry and Stereotactic Radiosurgery Systems. Med Phys 2013. [DOI: 10.1118/1.4814234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Unkelbach J, Dittmann F, Menze B, Konukoglu E, Shih H. SU-E-T-486: Evaluation of the Fisher-Kolmogorov Glioma Growth Model for Radiotherapy Target Delineation. Med Phys 2013. [DOI: 10.1118/1.4814919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Abstract
Interfacial visible light-mediated thiol-ene photoclick reactions were developed for preparing step-growth hydrogels with multilayer structures. The effect of a noncleavage type photoinitiator eosin-Y on visible-light-mediated thiol-ene photopolymerization was first characterized using in situ photorheometry, gel fraction, and equilibrium swelling ratio. Next, spectrophotometric properties of eosin-Y in the presence of various relevant macromer species were evaluated using ultraviolet-visible light (UV-vis) spectrometry. It was determined that eosin-Y was able to reinitiate the thiol-ene photoclick reaction, even after light exposure. Because of its small molecular weight, most eosin-Y molecules readily leached out from the hydrogels. The diffusion of residual eosin-Y from preformed hydrogels was exploited for fabricating multilayer step-growth hydrogels. Interfacial hydrogel coating was formed via the same visible-light-mediated gelation mechanism without adding fresh initiator. The thickness of the thiol-ene gel coating could be easily controlled by adjusting visible light exposure time, eosin-Y concentration initially loaded in the core gel, or macromer concentration in the coating solution. The major benefits of this interfacial thiol-ene coating system include its simplicity and cytocompatibility. The formation of thiol-ene hydrogels and coatings neither requires nor generates any cytotoxic components. This new gelation chemistry may have great utilities in controlled release of multiple sensitive growth factors and encapsulation of multiple cell types for tissue regeneration.
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Affiliation(s)
| | | | - Chien-Chi Lin
- Corresponding author: Chien-Chi Lin, PhD., Assistant Professor, Department of Biomedical Engineering, Indiana University-Purdue University at Indianapolis, 723 W. Michigan St. SL220K, Indianapolis, IN. 46202, USA, Phone: 317-274-0760,
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Shih H, Lin CC. Visible-Light-Mediated Thiol-Ene Hydrogelation Using Eosin-Y as the Only Photoinitiator. Macromol Rapid Commun 2013; 34:269-73. [DOI: 10.1002/marc.201200605] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 10/16/2012] [Indexed: 11/06/2022]
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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
Thiol-ene photoclick hydrogels have been used for a variety of tissue engineering and controlled release applications. In this step-growth photopolymerization scheme, four-arm poly(ethylene glycol) norbornene (PEG4NB) was cross-linked with dithiol containing cross-linkers to form chemically cross-linked hydrogels. While the mechanism of thiol-ene gelation was well described in the literature, its network ideality and degradation behaviors are not well-characterized. Here, we compared the network cross-linking of thiol-ene hydrogels to Michael-type addition hydrogels and found thiol-ene hydrogels formed with faster gel points and higher degree of cross-linking. However, thiol-ene hydrogels still contained significant network nonideality, demonstrated by a high dependency of hydrogel swelling on macromer contents. In addition, the presence of ester bonds within the PEG-norbornene macromer rendered thiol-ene hydrogels hydrolytically degradable. Through validating model predictions with experimental results, we found that the hydrolytic degradation of thiol-ene hydrogels was not only governed by ester bond hydrolysis, but also affected by the degree of network cross-linking. In an attempt to manipulate network cross-linking and degradation of thiol-ene hydrogels, we incorporated peptide cross-linkers with different sequences and characterized the hydrolytic degradation of these PEG-peptide hydrogels. In addition, we incorporated a chymotrypsin-sensitive peptide as part of the cross-linkers to tune the mode of gel degradation from bulk degradation to surface erosion.
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Affiliation(s)
- Han Shih
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana 46202, United States
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38
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Unkelbach J, Menze B, Konukoglu E, Motamedi A, Ayache N, Shih H. SU-C-BRB-05: Accounting for Anisotropic Growth of Glioma in Radiotherapy Planning. Med Phys 2012. [DOI: 10.1118/1.4734622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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39
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Verburg J, Shih H, Seco J. MO-A-213AB-06: Validation of Nuclear Reaction Models to Simulate Proton Therapy Range Verification Using Prompt Gamma-Rays. Med Phys 2012; 39:3860. [DOI: 10.1118/1.4735758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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40
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Min C, Zhu X, Grogg K, Winey B, Fakhri G, Bortfeld T, Shih H, Paganetti H. MO-A-213AB-07: Evaluation of Distal Dose Surface with In-Room PET for Proton Therapy Monitoring. Med Phys 2012; 39:3860. [DOI: 10.1118/1.4735759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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41
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Lin CC, Raza A, Shih H. PEG hydrogels formed by thiol-ene photo-click chemistry and their effect on the formation and recovery of insulin-secreting cell spheroids. Biomaterials 2011; 32:9685-95. [PMID: 21924490 DOI: 10.1016/j.biomaterials.2011.08.083] [Citation(s) in RCA: 190] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2011] [Accepted: 08/31/2011] [Indexed: 02/06/2023]
Abstract
Hydrogels provide three-dimensional frameworks with tissue-like elasticity and high permeability for culturing therapeutically relevant cells or tissues. While recent research efforts have created diverse macromer chemistry to form hydrogels, the mechanisms of hydrogel polymerization for in situ cell encapsulation remain limited. Hydrogels prepared from chain-growth photopolymerization of poly(ethylene glycol) diacrylate (PEGDA) are commonly used to encapsulate cells. However, free radical associated cell damage poses significant limitation for this gel platform. More recently, PEG hydrogels formed by thiol-ene photo-click chemistry have been developed for cell encapsulation. While both chain-growth and step-growth photopolymerizations offer spatial-temporal control over polymerization kinetics, step-growth thiol-ene hydrogels offer more diverse and preferential properties. Here, we report the superior properties of step-growth thiol-ene click hydrogels, including cytocompatibility of the reactions, improved hydrogel physical properties, and the ability for 3D culture of pancreatic β-cells. Cells encapsulated in thiol-ene hydrogels formed spherical clusters naturally and were retrieved via rapid chymotrypsin-mediated gel erosion. The recovered cell spheroids released insulin in response to glucose treatment, demonstrating the cytocompatibility of thiol-ene hydrogels and the enzymatic mechanism of cell spheroids recovery. Thiol-ene click reactions provide an attractive means to fabricate PEG hydrogels with superior gel properties for in situ cell encapsulation, as well as to generate and recover 3D cellular structures for regenerative medicine applications.
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Affiliation(s)
- Chien-Chi Lin
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, IN 46202, USA.
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42
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Huang CY, Shih H, Lin LY, Cheng WC, Wong CH, Ma C. Crystal structure of Staphylococcus aureusMGT in complex with a lipid II analog. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311088088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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43
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Singh K, Sarfehnia A, Tomic N, Liang L, Deblois F, Seuntjens J, Lewis D, Shih H, Devic S. MO-F-214-04: Protoyping Compositions of Novel Radiochromic Film Types: Towards Complete Absorbed Dose Energy Independence. Med Phys 2011. [DOI: 10.1118/1.3613017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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44
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Unkelbach J, Menze B, Konukoglu E, Shih H, Ayache N, Bortfeld T. WE-G-BRA-06: Radiotherapy Planning for Glioma Based on a Computational Tumor Growth Model. Med Phys 2011. [DOI: 10.1118/1.3613411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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45
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Andronesi O, Seco J, Shih H, Sorensen G. TH-C-204C-02: Advanced MR Spectroscopy Methods for Studying Metabolism and Radiation Treatment Response in Brain Tumors. Med Phys 2010. [DOI: 10.1118/1.3469504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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46
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Seco J, Hong T, Shih H. TH-C-204C-01: A Physicist Perspective of the Use of MRI and Spectroscopy for In-Vivo Verification of Photon and Proton Beam Therapy. Med Phys 2010. [DOI: 10.1118/1.3469503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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47
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Martone R, Meehan J, Xu J, Mercado M, Staal R, Hubbell A, Kubek K, Nawoschik S, Das I, Shih H, Dunlop J, Pangalos M, Reinhart P. P3.007 Modeling synucleinopathies: intracellular delivery of alpha-synuclein oligomers via protein transfection results in intracellular alpha-synuclein inclusions. Parkinsonism Relat Disord 2009. [DOI: 10.1016/s1353-8020(09)70571-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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48
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Sperduto P, Chao S, Sneed P, Luo X, Roberge D, Bhatt A, Jensen A, Shih H, Kirkpatrick J, Schwer A. Diagnosis-specific Prognostic Factors, Indices, and Treatment Outcomes for Patients with Newly-diagnosed Brain Metastases: A Multi-institutional Analysis of over 5000 Patients. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.519] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Watson GJ, Kugel MR, Shih H, Tak Piech C, McKenzie RS. Cardiac cormorbidities in women with metastatic breast cancer treated with doxorubicin-based and non-doxorubicin-based chemotherapy. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.1052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
1052 Background: Observational data are sparse regarding cardiac comorbidities in patients with metastatic breast cancer (MBC) newly initiated on chemotherapy. As some MBC treatments are associated with cardiac toxicity, such information would be useful in guiding treatment decisions. The objective of this analysis was to understand the frequency of cardiac comorbidities in MBC patients prior to chemotherapy initiation based on the Medicare 5% standard analytical file (SAF). Methods: The Medicare 5% SAF was used to investigate claims for women with breast neoplasm and > 1 distant metastatic site (based on ICD-9 diagnosis codes) that subsequently received chemotherapy (based on claims with a chemotherapy J code). Cardiac comorbidities [hypertension (HTN), coronary artery disease (CAD), myocardial function (MI), and congestive heart failure (CHF)] prior to initial chemotherapy were reported as non-mutually exclusive categories. The index quarter was based on chemotherapy initiation that occurred between 7/2001 and 12/2006. Patients were categorized based on receipt of non doxorubicin-based chemotherapy (non-DOX) vs DOX-based chemotherapy. Results: The study included 2,587 women with MBC that received cytotoxic chemotherapy subsequent to the diagnosis of MBC. The mean age was higher in the non-DOX group. Both groups reported a significant proportion of patients with cardiac comorbidities prior to chemotherapy, with greater proportions reported in the non-DOX group (table). Conclusions: Cardiac comorbidities were commonly reported in women with MBC prior to chemotherapy. Such information is useful to health care professionals when considering potential interventions for patients with MBC. [Table: see text] [Table: see text]
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Affiliation(s)
- G. J. Watson
- The Moran Company, Arlington, VA; Centocor Ortho Biotech Services LLC, Horsham, PA
| | - M. R. Kugel
- The Moran Company, Arlington, VA; Centocor Ortho Biotech Services LLC, Horsham, PA
| | - H. Shih
- The Moran Company, Arlington, VA; Centocor Ortho Biotech Services LLC, Horsham, PA
| | - C. Tak Piech
- The Moran Company, Arlington, VA; Centocor Ortho Biotech Services LLC, Horsham, PA
| | - R. S. McKenzie
- The Moran Company, Arlington, VA; Centocor Ortho Biotech Services LLC, Horsham, PA
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Knopf A, Parodi K, Paganetti H, Shih H, Bortfeld T. TU-FF-A1-01: Quantification of Clinical Limitations of Proton Beam Range Verification Using Offline PET/CT Due to Biological Washout Effects. Med Phys 2008. [DOI: 10.1118/1.2962638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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