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Targeted therapies for bladder cancer

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https://www.readbyqxmd.com/read/28094956/radiolabeled-r954-derivatives-for-imaging-bradykinin-b1-receptor-expression-with-positron-emission-tomography
#1
Hsiou-Ting Kuo, Jinhe Pan, Joseph Lau, Chengcheng Zhang, Jutta Zeisler, Nadine Colpo, Francois Benard, Kuo-Shyan Lin
Peptide receptors have emerged as promising targets for diagnosis and therapy. The aberrant overexpression of these receptors in different cancer subtypes allows for the adoption of new treatment strategies that complement conventional chemotherapies. Bradykinin B1 receptor (B1R) is a G protein-coupled receptor that is overexpressed in many cancers, with limited expression in healthy tissues. Previously, we developed 68Ga- and 18F-labeled derivatives of B1R antagonist peptides B9858 and B9958, and successfully targeted B1R-expressing tumor xenografts in vivo...
January 17, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28077128/treatment-planning-comparison-of-impt-vmat-and-4%C3%AF-radiotherapy-for-prostate-cases
#2
Angelia Tran, Jingjing Zhang, Kaley Woods, Victoria Yu, Dan Nguyen, Gary Gustafson, Lane Rosen, Ke Sheng
BACKGROUND: Intensity-modulated proton therapy (IMPT), non-coplanar 4π intensity-modulated radiation therapy (IMRT), and volumetric-modulated arc therapy (VMAT) represent the most advanced treatment methods based on heavy ion and X-rays, respectively. Here we compare their performance for prostate cancer treatment. METHODS: Ten prostate patients were planned using IMPT with robustness optimization, VMAT, and 4π to an initial dose of 54 Gy to a clinical target volume (CTV) that encompassed the prostate and seminal vesicles, then a boost prescription dose of 25...
January 11, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28075465/monoclonal-antibody-zt-g4-targeting-ron-receptor-tyrosine-kinase-enhances-chemosensitivity-of-bladder-cancer-cells-to-epirubicin-by-promoting-g1-s-arrest-and-apoptosis
#3
Jun-Feng Chen, Bi-Xia Yu, Rui Yu, Liang Ma, Xiu-Yi Lv, Yue Cheng, Qi Ma
Epirubicin (EPI) is one of the most used intravesical chemotherapy agents after transurethral resection to non-muscle invasive bladder tumors (NMIBC) to prevent cancer recurrence and progression. However, even after resection of bladder tumors and intravesical chemotherapy, half of them will recur and progress. RON is a membrane tyrosine kinase receptor usually overexpressed in bladder cancer cells and associated with poor pathological features. This study aims to investigate the effects of anti-RON monoclonal antibody Zt/g4 on the chemosensitivity of bladder cells to EPI...
February 2017: Oncology Reports
https://www.readbyqxmd.com/read/28065547/comparison-of-the-diabetes-guidelines-from-the-ada-easd-and-the-aace-ace
#4
Susan Cornell
OBJECTIVE: To compare recent diabetes guideline updates from the American Diabetes Association-European Association for the Study of Diabetes (ADA/EASD) and the American Association of Clinical Endocrinologists-American College of Endocrinology (AACE/ACE). SUMMARY: The ADA/EASD guideline continues to advocate a stepwise approach to glycemic control that initiates with metformin and intensifies treatment incrementally to dual and triple therapy at 3-month intervals until the patient is at their individualized goal...
January 5, 2017: Journal of the American Pharmacists Association: JAPhA
https://www.readbyqxmd.com/read/28064545/androgen-receptor-activation-a-prospective-therapeutic-target-for-bladder-cancer
#5
Taichi Mizushima, Kathleen A Tirador, Hiroshi Miyamoto
Patients with non-muscle-invasive or muscle-invasive bladder cancer undergoing surgery and currently available conventional therapy remain having a high risk of tumor recurrence or progression, respectively. Novel targeted molecular therapy is therefore expected to improve patient outcomes. Meanwhile, substantially higher incidence of bladder cancer in men has prompted research on androgen-mediated androgen receptor (AR) signaling in this malignancy. Indeed, preclinical evidence has suggested that AR signaling plays an important role in urothelial carcinogenesis and tumor outgrowth as well as resistance to some of the currently available conventional non-surgical therapies...
January 19, 2017: Expert Opinion on Therapeutic Targets
https://www.readbyqxmd.com/read/28064454/hgf-met-in-cancer-progression-and-biomarker-discovery
#6
REVIEW
Kunio Matsumoto, Masataka Umitsu, Dinuka M De Silva, Arpita Roy, Donald P Bottaro
Signaling driven by hepatocyte growth factor (HGF) and MET receptor facilitates conspicuous biological responses such as epithelial cell migration, 3-D morphogenesis, and survival. The dynamic migration and promotion of cell survival induced by MET activation are bases respectively for invasion-metastasis and resistance against targeted drugs in cancers. Recent studies indicated that MET in tumor-derived exosomes facilitates metastatic niche formation and metastasis in malignant melanoma. In lung cancer, gene amplification-induced MET activation and ligand-dependent MET activation in autocrine/paracrine manner are causes for resistance to EGF receptor tyrosine kinase inhibitors and ALK inhibitors...
January 8, 2017: Cancer Science
https://www.readbyqxmd.com/read/28058098/urinary-bladder-cancer-biomarkers-and-target-therapy-new-era-for-more-attention
#7
REVIEW
Amrallah A Mohammed, Hani El-Tanni, Hani M El-Khatib, Ahmad A Mirza, Abdulrahim A Mirza, Turki H Alturaifi
Currently, bladder cancer (BCa) evaluation depends mainly on traditional clinicopathological parameters encompassing tumor stage and grade, which will not reflect the behavior of the disease. Diverse molecular alterations are responsible for the heterogeneous course. The differences in molecular pathogenesis between non-invasive BCa and invasive BCa have been recognized. Molecular biomarkers are promising to predict progression and survival. The management of advanced BCa remains somewhat primitive in comparison with other more common malignancies...
October 10, 2016: Oncology Reviews
https://www.readbyqxmd.com/read/28057023/xiap-bir-domain-suppresses-mir-200a-expression-and-subsequently-promotes-egfr-protein-translation-and-anchorage-independent-growth-of-bladder-cancer-cell
#8
Chao Huang, Xingruo Zeng, Guosong Jiang, Xin Liao, Claire Liu, Jingxia Li, Honglei Jin, Junlan Zhu, Hong Sun, Xue-Ru Wu, Chuanshu Huang
BACKGROUND: The X-linked inhibitor of apoptosis protein (XIAP) is a well-known potent apoptosis suppressor and also participates in cancer cell biological behaviors, therefore attracting great attentions as a potential antineoplastic therapeutic target for past years. Anti-IAP therapy is reported to be closely related to epidermal growth factor receptor (EGFR) expression level. However, whether and how XIAP modulates EGFR expression remains largely unknown. METHODS: Human XIAP was knockdown with short-hairpin RNA in two different bladder cancer cell lines, T24T and UMUC3...
January 5, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28048517/tu-h-brc-03-evaluation-of-very-high-energy-electron-vhee-beams-in-comparison-to-vmat-and-pbs-treatment-plans
#9
E Schueler, K Eriksson, E Hynning, B Loo, P Maxim
PURPOSE: The aim of this study was to evaluate the performance of very high-energy electron (VHEE) beams in comparison to clinically delivered treatment plans generated with volumetric modulated arc therapy (VMAT) and proton pencil beam scanning (PBS) technology. METHODS: Three clinical cases were selected (prostate, lung, and pediatric CNS). The VHEE plans were calculated in the Monte Carlo EGSnrc code and pencil beam doses were calculated using the DOSxyznrc MC code for 100 and 200 MeV beams...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048476/su-f-t-448-use-of-mixed-photon-energy-beam-in-volumetric-modulated-arc-therapy-vmat-treatment-plan-for-prostate-cancer
#10
D Manigandan, M Kumar, P Mohandas, A Puri, N Bhalla
PURPOSE: To study the impact of different photon beam combination during VMAT planning and treatment delivery. METHODS: Five prostate patients with no nodal involvement were chosen for the study and only prostate was considered as target (7920cGy/44fractions). In each case, three different VMAT plans were generated with two arcs (200°-160°&160°-200°). First plan used only 6MV in both arcs (6X-6X) and second utilized 6MV&15MV (6X-15X), whereas third one used 15MV&15MV (15X-15X)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047983/su-f-t-196-hypo-fractionation-with-intensity-modulated-proton-therapy-for-unilateral-metallic-prosthesis-prostate-cancer-patients
#11
S Rana, Y Zheng, Y Zhang, Pokharel, C Cheng, S Park
PURPOSE: The purpose of this study is to investigate the dosimetric feasibility of hypo-fractionated intensity modulated proton therapy (IMPT) for unilateral metallic prosthesis prostate cancer patients based on proton collaborative group (PCG)-GU002-10 (NCT01230866) protocol criteria. METHODS: A total of five unilateral metallic prosthesis prostate cancer cases were included in this retrospective study. For each case, IMPT plans were generated for treatment to be delivered with 7...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047846/su-f-t-534-using-daily-images-to-verify-dosimetric-advantage-of-dual-isocentric-technique-for-high-risk-prostate-cancer-treated-with-pelvic-lymph-node
#12
T Cui, Q Shang, W Li, A Vassil, P Xia
PURPOSE: To evaluate a dual-isocentric technique to compensate for the daily independent movements of prostate and pelvic lymph nodes (PLN) of high-risk prostate cancer patients. METHODS: Three patients, who received 78 Gy to the prostate, 66 Gy to the seminal vesicle (SV), and 50.4 Gy to the PLN in 39 fractions under CT-on-rail (CTOR) imaging guidance, were retrospectively selected. Each patient was planned with volumetric modulated arc therapy (VMAT) techniques using (1) single isocenter with a 6 mm margin except 4 mm posteriorly (6/4 mm), to the prostate-CTV and a uniform 5 mm margin to the PLN-CTV, and (2) two isocenters, located at the centroids of the prostate or the PLN, with a 5/3 mm margin to the prostate-CTV and a 5 mm uniform margin to the PLN-CTV...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047810/su-f-t-592-a-delivery-qa-free-approach-for-adaptive-therapy-of-prostate-cancer-with-static-intensity-modulated-radiotherapy
#13
T Roth, J Dooley, T Zhu, R Woods, P Mavroidis, J Lian
PURPOSE: Clinical implementations of adaptive radiotherapy (ART) are limited mainly by the requirement of delivery QA (DQA) prior to the treatment. Small segment size and small segment MU are two dominant factors causing failures of DQA. The aim of this project is to explore the feasibility of ART treatment without DQA by using a partial optimization approach. METHODS: A retrospective simulation study was performed on two prostate cancer patients treated with SMLC-IMRT...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047756/we-ab-207b-09-margin-reduction-for-planning-target-volume-ptv-in-patients-with-localized-prostate-cancer-impact-on-delivered-dose-and-quality-of-life
#14
A Kumarasiri, C Liu, S Brown, C Glide-Hurst, M Elshaikh, I Chetty, B Movsas
PURPOSE: To estimate the delivered (cumulative) dose to targets and organs at risk for localized prostate cancer patients treated with reduced PTV margins and to evaluate preliminary patient reported quality-of-life (QOL). METHODS: Under an IRB-approved protocol, 20 prostate cancer patients (including 11 control patients) were treated with reduced planning margins (5 mm uniform with 4 mm at prostate/rectum interface). Control patients had standard margin (10/6 mm)-based treatments...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047493/su-f-t-625-optimal-treatment-planning-strategy-among-arc-arrangements-for-prostate-sbrt-with-vmat-technique
#15
J Chung, S Kang, T Suh, J Lee, J Kim, K Eom
PURPOSE: The purpose of this study is to determine the optimal treatment planning strategy among the different arc arrangements for prostate stereotactic body radiotherapy (SBRT) plans with volumetric modulated arc therapy (VMAT). METHODS: Ten patients with prostate cancer were selected. The SBRT-VMAT plans for each patient were generated with single-full (181° to 179°; 1FA), single-partial (240° to 120°; 1PA), double-full (181° to 179° and 179° to 181°; 2FA), and double-partial (240° to 120° and 120° to 240°; 2PA) arc arrangements...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047313/su-f-t-197-investigating-optimal-oblique-beam-arrangement-for-bilateral-metallic-prosthesis-prostate-cancer-in-pencil-beam-scanning-proton-therapy
#16
S Rana, Y Zheng, C Cheng, H Singh, T Twyford, B Tesfamicael, S Park
PURPOSE: The main purpose of this study is to investigate the optimum oblique-beam arrangement for bilateral metallic prosthesis prostate cancer treatment in pencil beam scanning (PBS) proton therapy. METHODS: A computed tomography dataset of bilateral metallic prosthesis prostate cancer case was selected for this retrospective study. A total of four beams (rightanterior- oblique [RAO], left-anterior-oblique [LAO], left-posterior-oblique [LPO], and right-posterior-oblique [RPO]) were selected for treatment planning...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047146/we-ab-209-04-biological-evaluation-of-universal-multi-criteria-optimization-vmat-prostate-plans
#17
M Guerrero, S Chen
PURPOSE: In recent years Multi-Criteria Optimization (MCO) has become commercially available as a potential optimization method for intensity modulated and volumetric arc therapies (IMRT and VMAT). The purpose of our work is to develop a universal set of objectives and constraints to generate prostate cancer MCO plans with VMAT and evaluate them using biological metrics. METHODS: We randomly selected ten prostate plans (two-arc VMAT) for patients with intermediate risk prostate cancer prescribed 75...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046438/we-ab-207b-11-optimizing-tumor-control-probability-in-radiation-therapy-treatment-application-to-hdr-cervical-cancer
#18
E Lee, F Yuan, A Templeton, R Yao, J Chu
PURPOSE: The ultimate goal of radiotherapy treatment planning is to find a treatment that will yield a high tumor-control-probability(TCP) with an acceptable normal-tissue-complication probability(NTCP). Yet most treatment planning today is not based upon optimization of TCPs and NTCPs, but rather upon meeting physical dose and volume constraints defined by the planner. We design treatment plans that optimize TCP directly and contrast them with the clinical dose-based plans. PET image is incorporated to evaluate gain in TCP for dose escalation...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046335/su-g-jep4-09-impact-of-interfractional-motion-on-hypofractionated-pencil-beam-scanning-proton-therapy-for-prostate-cancer
#19
M Moteabbed, A Trofimov, G Sharp, Y Wang, A Zietman, J Efstathiou, H Lu
PURPOSE: To investigate the impact of anatomy/setup variations on standard vs. hypofractionated anterolateral pencil beam scanning (PBS) proton therapy for prostate cancer. METHODS: Six prostate cancer patients treated with double-scattering proton therapy, who underwent weekly verification CT scans were selected. Implanted fiducials were used for localization, and endorectal balloons for immobilization. New PBS plans using combination of lateral and anterior-oblique (AO) (±35 deg) beams were created...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046275/su-f-p-29-impact-of-oral-contrast-agent-for-assisting-in-outlining-small-intestine-on-pelvic-imat-dose-in-patients-with-cervical-cancer
#20
R Zhang, W Bai, X Fan
PURPOSE: As the advanced intensity modulated arc therapy(IMAT) delivery systems becoming a main role of treatment ways, which places even greater demands on delivering accuracy. The impact of oral contrast agent (meglumine diatrizoate) for assisting in outlining the small intestine on pelvic IMAT dose in patients with cervical cancer was investigated. METHODS: Ten cervical cancer patients for postoperative radiotherapy underwent CT scans, and the planning target volumes (PTV) and organs at risk (including the small intestine, rectum, bladder, colon and the left and right femoral head) were contoured...
June 2016: Medical Physics
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