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https://www.readbyqxmd.com/read/28102015/circulating-antioxidant-levels-and-risk-of-prostate-cancer-by-tmprss2-erg
#1
Rebecca E Graff, Gregory Judson, Thomas U Ahearn, Michelangelo Fiorentino, Massimo Loda, Edward L Giovannucci, Lorelei A Mucci, Andreas Pettersson
BACKGROUND: Few studies have considered etiological differences across molecular subtypes of prostate cancer, despite potential to improve opportunities for precision prevention of a disease for which modifiable risk factors have remained elusive. Factors that lead to DNA double-strand breaks, such as oxidative stress, may promote the formation of the TMPRSS2:ERG gene fusion in prostate cancer. We tested the hypothesis that increasing levels of pre-diagnostic circulating antioxidants, which may reduce oxidative stress, are associated with lower risk of developing TMPRSS2:ERG positive prostate cancer...
January 19, 2017: Prostate
https://www.readbyqxmd.com/read/28093292/multiparametric-magnetic-resonance-ultrasound-fusion-prostate-biopsy-number-and-spatial-distribution-of-cores-for-a-better-index-tumor-detection-and-characterization
#2
Francesco Porpiglia, Stefano De Luca, Roberto Passera, Agostino De Pascale, Daniele Amparore, Giovanni Cattaneo, Enrico Checcucci, Sabrina De Cillis, Diletta Garrou, Matteo Manfredi, Fabrizio Mele, Enrico Bollito, Cristian Fiori
PURPOSE: to evaluate the minimum cores number for a better index tumor detection, to investigate the best core site and biopsy Gleason Score (GS) heterogeneity within the same index lesion, to optimize the highest GS detection. MATERIALS AND METHODS: 327 patients with negative DRE underwent MRI/TRUS fusion targeted biopsy (TBx) for elevated/rising PSA, and/or ≥1 detectable lesions at multiparametric MRI after previous negative standard biopsy. Depending on the diameter of each index lesion, ≤8 or > 8 mm, four or six cores were taken respectively, according to a well-determined sequence...
January 13, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28093146/re-magnetic-resonance-imaging-ultrasound-fusion-biopsy-during-prostate-cancer-active-surveillance
#3
Samir S Taneja
No abstract text is available yet for this article.
February 2017: Journal of Urology
https://www.readbyqxmd.com/read/28086856/the-addition-of-a-sagittal-image-fusion-improves-the-prostate-cancer-detection-in-a-sensor-based-mri-ultrasound-fusion-guided-targeted-biopsy
#4
Karsten Günzel, Hannes Cash, John Buckendahl, Maximilian Königbauer, Patrick Asbach, Matthias Haas, Jörg Neymeyer, Stefan Hinz, Kurt Miller, Carsten Kempkensteffen
BACKGROUND: To explore the diagnostic benefit of an additional image fusion of the sagittal plane in addition to the standard axial image fusion, using a sensor-based MRI/US fusion platform. METHODS: During July 2013 and September 2015, 251 patients with at least one suspicious lesion on mpMRI (rated by PI-RADS) were included into the analysis. All patients underwent MRI/US targeted biopsy (TB) in combination with a 10 core systematic prostate biopsy (SB). All biopsies were performed on a sensor-based fusion system...
January 13, 2017: BMC Urology
https://www.readbyqxmd.com/read/28074780/mri-directed-cognitive-fusion-guided-biopsy-of-the-anterior-prostate-tumors
#5
Ian G Murphy, Elaine NiMhurchu, Robert G Gibney, Colm J McMahon
PURPOSE: We aimed to evaluate the efficacy of magnetic resonance imaging (MRI)-directed cognitive fusion transrectal ultrasonography (TRUS)-guided anterior prostate biopsy for diagnosis of anterior prostate tumors and to illustrate this technique. METHODS: A total of 39 patients with previous negative TRUS biopsy, but high clinical suspicion of occult prostate cancer, prospectively underwent prostate MRI including diffusion-weighted imaging (DWI). Patients with a suspicious anterior lesion on MRI underwent targeted anterior gland TRUS guided biopsy with cognitive fusion technique using sagittal probe orientation...
January 11, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28073197/detection-rate-for-significant-cancer-at-confirmatory-biopsy-in-men-enrolled-in-active-surveillance-protocol-20-cores-vs-30-cores-vs-mri-trus-fusion-prostate-biopsy
#6
Pietro Pepe, Sebastiano Cimino, Antonio Garufi, Giandomenico Priolo, Giorgio Ivan Russo, Raimondo Giardina, Giulio Reale, Michele Barbera, Paolo Panella, Michele Pennisi, Giuseppe Morgia
INTRODUCTION: The detection rate for significant prostate cancer of extended vs saturation vs mMRI/TRUS fusion biopsy was prospectively evaluated in men enrolled in active surveillance (AS) protocol. Mterials and methods: From May 2013 to September 2016 75 men aged 66 years (median) with very low risk PCa were enrolled in an AS protocol and elegible criteria were: life expectancy greater than 10 years, cT1C, PSA below 10 ng/ml, PSA density < 0.20, 2 < unilateral positive biopsy cores, Gleason score (GS) equal to 6, greatest percentage of cancer (GPC) in a core < 50%...
December 30, 2016: Archivio Italiano di Urologia, Andrologia
https://www.readbyqxmd.com/read/28073196/mri-us-fusion-prostate-biopsy-our-initial-experience
#7
Vito Lacetera, Bernardo Cervelli, Antonio Cicetti, Giuliana Gabrielloni, Michele Montesi, Roberto Morcellini, Gianni Parri, Emilio Recanatini, Gianluca Giglioni, Andrea Benedetto Galosi, Valerio Beatrici
AIM: The objective of this study is to present our initial experience with magnetic resonance imaging/ultrasound (MRI/US) fusion biopsy using the Koelis Trinity device after the first consecutive 59 patients. MATERIALS AND METHODS: 59 consecutive patients with suspected prostate cancer (PCA) underwent prostate biopsy using Trinity Koelis® (Koelis, Grenoble, France). We divided the patients into 2 groups: patients with a previous negative mapping underwent to a MRI/US fusion re-biopsy (Group A); and biopsy-naïve patients who underwent to a first stereotactic 3-D mapping of the prostate (Group B)...
December 30, 2016: Archivio Italiano di Urologia, Andrologia
https://www.readbyqxmd.com/read/28073195/cognitive-zonal-fusion-biopsy-of-the-prostate-original-technique-between-target-and-saturation
#8
Andrea B Galosi, Guevar Maselli, Giulia Sbrollini, Gaetano Donatelli, Lorenzo Montesi, Matteo Tallè, Rodolfo Montironi
: We describe our experience in prostate biopsy using a new standardized cognitive fusion techniques, that we call "cognitive zonal fusion biopsy". This new technique is based on two operative options: the first based on target biopsies, the Cognitive Target Biopsy (CTB) if the same target was detected with transrectal ultrasound (TRUS) and multiparametric magnetic resonance (mpMRI); the second based on saturation biopsies, the Zonal Saturation Biopsy (ZSB) on anatomical zone/s containing the region of interest if the same target was not evident with TRUS and MRI...
December 30, 2016: Archivio Italiano di Urologia, Andrologia
https://www.readbyqxmd.com/read/28061466/prostate-cancer-proteomics-current-trends-and-future-perspectives-for-biomarker-discovery
#9
Cristiana Pistol Tanase, Elena Codrici, Ionela Daniela Popescu, Simona Mihai, Ana-Maria Enciu, Laura Georgiana Necula, Adrian Preda, Gener Ismail, Radu Albulescu
The clinical and fundamental research in prostate cancer - the most common urological cancer in men - is currently entering the proteomic and genomic era. The focus has switched from one single marker (PSA) to panels of biomarkers (including proteins involved in ribosomal function and heat shock proteins). Novel genetic markers (such as Transmembrane protease serine 2 (TMPRSS2)-ERG fusion gene mRNA) or prostate cancer gene 3 (PCA3) had already entered the clinical practice, raising the question whether subsequent protein changes impact the evolution of the disease and the response to treatment...
January 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28056889/dimensionality-reduction-based-fusion-approaches-for-imaging-and-non-imaging-biomedical-data-concepts-workflow-and-use-cases
#10
Satish E Viswanath, Pallavi Tiwari, George Lee, Anant Madabhushi
BACKGROUND: With a wide array of multi-modal, multi-protocol, and multi-scale biomedical data being routinely acquired for disease characterization, there is a pressing need for quantitative tools to combine these varied channels of information. The goal of these integrated predictors is to combine these varied sources of information, while improving on the predictive ability of any individual modality. A number of application-specific data fusion methods have been previously proposed in the literature which have attempted to reconcile the differences in dimensionalities and length scales across different modalities...
January 5, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28055969/tmprss2-erg-fusion-promotes-prostate-cancer-metastases-in-bone
#11
Rachel Deplus, Carine Delliaux, Nathalie Marchand, Anne Flourens, Nathalie Vanpouille, Xavier Leroy, Yvan de Launoit, Martine Duterque-Coquillaud
Bone metastasis is the major deleterious event in prostate cancer (PCa). TMPRSS2-ERG fusion is one of the most common chromosomic rearrangements in PCa. However, its implication in bone metastasis development is still unclear. Since bone metastasis starts with the tropism of cancer cells to bone through specific migratory and invasive processes involving osteomimetic capabilities, it is crucial to better our understanding of the influence of TMPRSS2-ERG expression in the mechanisms underlying the bone tropism properties of PCa cells...
December 31, 2016: Oncotarget
https://www.readbyqxmd.com/read/28050800/micro-rna-204-participates-in-tmprss2-erg-regulation-and-androgen-receptor-reprogramming-in-prostate-cancer
#12
Krassimira Todorova, Metodi V Metodiev, Gergana Metodieva, Milcho Mincheff, Nelson Fernández, Soren Hayrabedyan
Cancer progression is driven by genome instability incurred rearrangements such as transmembrane protease, serine 2 (TMPRSS2)/v-ets erythroblastosis virus E26 oncogene (ERG) that could possibly turn some of the tumor suppressor micro-RNAs into pro-oncogenic ones. Previously, we found dualistic miR-204 effects, acting either as a tumor suppressor or as an oncomiR in ERG fusion-dependent manner. Here, we provided further evidence for an important role of miR-204 for TMPRSS2/ERG and androgen receptor (AR) signaling modulation and fine tuning that prevents TMPRSS2/ERG overexpression in prostate cancer...
January 3, 2017: Hormones & Cancer
https://www.readbyqxmd.com/read/28047680/su-f-j-111-a-novel-distance-dose-weighting-method-for-label-fusion-in-multi-atlas-segmentation-for-prostate-radiation-therapy
#13
J Chang, X Gu, W Lu, T Song, S Jiang
PURPOSE: A novel distance-dose weighting method for label fusion was developed to increase segmentation accuracy in dosimetrically important regions for prostate radiation therapy. METHODS: Label fusion as implemented in the original SIMPLE (OS) for multi-atlas segmentation relies iteratively on the majority vote to generate an estimated ground truth and DICE similarity measure to screen candidates. The proposed distance-dose weighting puts more values on dosimetrically important regions when calculating similarity measure...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046902/su-d-207a-03-potential-role-of-bold-mri-in-discrimination-of-aggressive-tumor-habitat-in-prostate-cancer
#14
J Ford, C Lopez, Y Tschudi, A Breto, K Padgett, A Pollack, R Stoyanova
PURPOSE: To determine whether blood oxygenation level dependent (BOLD) MRI signal measured in prostate cancer patients, in addition to quantitative diffusion and perfusion parameters from multiparametric (mp)MRI exams, can help discriminate aggressive and/or radioresistant lesions. METHODS: Several ongoing clinical trials in our institution require mpMRI exam to determine eligibility (presence of identifiable tumor lesion on mpMRI) and prostate volumes for dose escalation...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046837/su-f-t-42-mri-and-trus-image-fusion-as-a-mode-of-generating-more-accurate-prostate-contours
#15
M Petronek, A Purysko, S Balik, J Ciezki, E Klein, D Wilkinson
PURPOSE: Transrectal Ultrasound (TRUS) imaging is utilized intra-operatively for LDR permanent prostate seed implant treatment planning. Prostate contouring with TRUS can be challenging at the apex and base. This study attempts to improve accuracy of prostate contouring with MRI-TRUS fusion to prevent over- or under-estimation of the prostate volume. METHODS: 14 patients with previous MRI guided prostate biopsy and undergone an LDR permanent prostate seed implant have been selected...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046406/we-ab-bra-12-post-implant-dosimetry-in-prostate-brachytherapy-by-x-ray-and-mri-fusion
#16
S Park, Y Le, D Song, J Lee
PURPOSE: For post-implant dosimetric assessment after prostate brachytherapy, CT-MR fusion approach has been advocated due to the superior accuracy on both seeds localization and soft tissue delineation. However, CT deposits additional radiation to the patient, and seed identification in CT requires manual review and correction. In this study, we propose an accurate, low-dose, and cost-effective post-implant dosimetry approach based on X-ray and MRI. METHODS: Implanted seeds are reconstructed using only three X-ray fluoroscopy images by solving a combinatorial optimization problem...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046310/th-cd-206-02-best-in-physics-imaging-3d-prostate-segmentation-in-mr-images-using-patch-based-anatomical-signature
#17
X Yang, A Jani, P Rossi, H Mao, W Curran, T Liu
PURPOSE: MRI has shown promise in identifying prostate tumors with high sensitivity and specificity for the detection of prostate cancer. Accurate segmentation of the prostate plays a key role various tasks: to accurately localize prostate boundaries for biopsy needle placement and radiotherapy, to initialize multi-modal registration algorithms or to obtain the region of interest for computer-aided detection of prostate cancer. However, manual segmentation during biopsy or radiation therapy can be time consuming and subject to inter- and intra-observer variation...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28035996/novel-nine-exon-ar-transcripts-exon-1-exon-1b-exons-2-8-in-normal-and-cancerous-breast-and-prostate-cells
#18
Dong Gui Hu, Ross A McKinnon, Julie-Ann Hulin, Peter I Mackenzie, Robyn Meech
Nearly 20 different transcripts of the human androgen receptor (AR) are reported with two currently listed as Refseq isoforms in the NCBI database. Isoform 1 encodes wild-type AR (type 1 AR) and isoform 2 encodes the variant AR45 (type 2 AR). Both variants contain eight exons: they share common exons 2-8 but differ in exon 1 with the canonical exon 1 in isoform 1 and the variant exon 1b in isoform 2. Splicing of exon 1 or exon 1b is reported to be mutually exclusive. In this study, we identified a novel exon 1b (1b/TAG) that contains an additional TAG trinucleotide upstream of exon 1b...
December 27, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28031426/molecular-profiling-to-determine-clonality-of-serial-magnetic-resonance-imaging-ultrasound-fusion-biopsies-from-men-on-active-surveillance-for-low-risk-prostate-cancer
#19
Ganesh S Palapattu, Simpa S Salami, Andi K Cani, Daniel H Hovelson, Lorena Lazo de la Vega, Kelly R Vandenberg, Jarred V Bratley, Chia-Jen Liu, Lakshmi P Kunju, Jeffery S Montgomery, Todd M Morgan, Shyam Natarajan, Jiaoti Huang, Scott A Tomlins, Leonard S Marks
PURPOSE: To determine whether MRI/ultrasound (MRI/US) fusion biopsy facilitates longitudinal resampling of the same clonal focus of prostate cancer and to determine whether high-grade cancers can evolve from low-grade clones. EXPERIMENTAL DESIGN: All men on active surveillance who underwent tracking MRI/US fusion biopsy of Gleason 6 prostate cancer, on at least two distinct occasions, between 2012 and 2014 were enrolled. MRI/US fusion was used to track and resample specific cancer foci...
October 7, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28027738/prostate-cancer-diagnosis-efficacy-of-a-simple-electromagnetic-mri-trus-fusion-method-to-target-biopsies
#20
Amina Jelidi, Mickael Ohana, Aïssam Labani, Guillaume Alemann, Herve Lang, Catherine Roy
OBJECTIVE: To assess that transrectal ultrasound guidance (TRUS) targeted biopsies (TB) aimed with an easy to use electronic real-time fusion registration device have a higher rate of prostate cancer (PC) detection than standard biopsies (SB). MATERIAL AND METHODS: This prospective study included 130 patients referred for TRUS biopsies after suspicious MRI. They underwent 16-core SB and 2 to 3 cores in each MRI suspicious area, using a fusion software. We noted SB and TB positivity for PC and Gleason score (GS)...
January 2017: European Journal of Radiology
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