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https://www.readbyqxmd.com/read/28527407/mechanisms-of-resistance-to-systemic-therapy-in-metastatic-castration-resistant-prostate-cancer
#1
REVIEW
Giuseppe Galletti, Benjamin I Leach, Linda Lam, Scott T Tagawa
Patients with metastatic castration-resistant prostate cancer (mCPRC) now have an unprecedented number of approved treatment options, including chemotherapies (docetaxel, cabazitaxel), androgen receptor (AR)-targeted therapies (enzalutamide, abiraterone), a radioisotope (radium-223) and a cancer vaccine (sipuleucel-T). However, the optimal treatment sequencing pathway is unknown, and this problem is exacerbated by the issues of primary and acquired resistance. This review focuses on mechanisms of resistance to AR-targeted therapies and taxane-based chemotherapy...
May 8, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28526418/prevalence-of-measurable-disease-in-metastatic-castration-resistant-prostate-cancer
#2
Guru Sonpavde, Ankit Madan, Mary K Baker, Jori E May, Gurudatta Naik, Sejong Bae
BACKGROUND: Because of the low historical prevalence of measurable disease in metastatic castration-resistant prostate cancer (mCRPC), phase II trials have used prostate-specific antigen (PSA) and bone scan changes as primary end points. Frequent whole-body imaging and improved computed tomography technology currently identify measurable disease more frequently, warranting consideration of objective response as a major end point. PATIENTS AND METHODS: Data from reported phase III trials of mCRPC were analyzed...
April 26, 2017: Clinical Genitourinary Cancer
https://www.readbyqxmd.com/read/28525684/223ra-dichloride-response-in-a-patient-with-paget-disease-and-bone-metastases-secondary-to-castration-resistant-prostate-cancer
#3
Lina García Cañamaque, Cristina Rioja Parada, Paloma García De la Peña
PURPOSE: Paget disease is commonly asymptomatic and discovered when an imaging test is performed for another clinical indication or when elevated serum alkaline phosphatase is found. Bone pain usually appears late in the disease process and is only present in a minority of patients. For diagnosis, X-ray and bone scan are the most recommended imaging methods; radionuclide imaging of the skeleton has become the standard, since it is the most sensitive test for detecting increased bone activity...
May 18, 2017: Tumori
https://www.readbyqxmd.com/read/28525341/morphological-analysis-of-testicles-in-cats-with-disorders-of-sex-development
#4
S Dzimira, W Nizanski, J A Madej
Disorders of sex development (DSD) are rare in cats. They can be caused by chromosomal aberrations, gene mutations or other undefined factors. The aim of the present study was to compare the histological structure and immunohistochemical reactivity of testes in cats with DSD and in healthy cats. The research material consisted of the gonads of four cats - phenotypic males with an incorrect structure of the reproductive system. The control group consisted of the testes of four healthy cats - routinely castrated phenotypical males...
March 28, 2017: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28522737/why-targeting-psma-is-a-valuable-addition-in-the-management-of-castration-resistant-prostate-cancer-the-urologists-point-of-view
#5
Boris Hadaschik, Martin Boegemann
No abstract text is available yet for this article.
May 18, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28522124/-prostate-cancer-histoseminar-update-of-the-2016-who-classification%C3%A2-%C3%A2-case-n-o-6-castration-resistant-prostate-cancer-with-partial-neuroendocrin-differenciation
#6
https://www.readbyqxmd.com/read/28521303/emt-circulating-tumor-cells-detected-by-cell-surface-vimentin-are-associated-with-prostate-cancer-progression
#7
Arun Satelli, Izhar Batth, Zachary Brownlee, Abhishek Mitra, Shouhao Zhou, Hyangsoon Noh, Christina R Rojas, Heming Li, Qing H Meng, Shulin Li
Recent advances in the field of circulating tumor cells (CTC) have shown promise in this liquid biopsy-based prognosis of patient outcome. However, not all of the circulating cells are tumor cells, as evidenced by a lack of tumor-specific markers. The current FDA standard for capturing CTCs (CellSearch) relies on an epithelial marker and cells captured via CellSearch cannot be considered to have undergone EMT. Therefore, it is difficult to ascertain the presence and relevance of any mesenchymal or EMT-like CTCs...
May 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28518406/host-density-increases-parasite-recruitment-but-decreases-host-risk-in-a-snail-trematode-system
#8
J C Buck, R F Hechinger, A C Wood, T E Stewart, A M Kuris, K D Lafferty
Most species aggregate in local patches. High host density in patches increases contact rate between hosts and parasites, increasing parasite transmission success. At the same time, for environmentally-transmitted parasites, high host density can decrease infection risk to individual hosts, because infective stages are divided among all hosts in a patch, leading to safety in numbers. We tested these predictions using the California horn snail, Cerithideopsis californica (=Cerithidea californica), which is the first intermediate host for at least 19 digenean trematode species in California estuaries...
May 18, 2017: Ecology
https://www.readbyqxmd.com/read/28515055/exome-sequencing-of-african-american-prostate-cancer-reveals-loss-of-function-erf-mutations
#9
Franklin W Huang, Juan Miguel Mosquera, Andrea Garofalo, Coyin Oh, Maria Baco, Ali Amin-Mansour, Bokang Rabasha, Samira Bahl, Stephanie A Mullane, Brian D Robinson, Saud Aldubayan, Francesca Khani, Beerinder Karir, Eejung Kim, Jeremy Chimene-Weiss, Matan Hofree, Alessandro Romanel, Joseph R Osborne, Jong Wook Kim, Gissou Azabdaftari, Anna Woloszynska-Read, Karen Sfanos, Angelo M De Marzo, Francesca Demichelis, Stacey Gabriel, Eliezer M Van Allen, Jill Mesirov, Pablo Tamayo, Mark A Rubin, Isaac J Powell, Levi A Garraway
African-American men have the highest incidence and mortality from prostate cancer. Whether a biological basis exists for this disparity remains unclear. Exome sequencing (n=102) and targeted validation (n = 90) of localized primary hormone-naïve prostate cancer in African-American men identified several gene mutations not previously observed in this context, including recurrent loss-of-function mutations in ERF, an ETS transcriptional repressor, in 5% of cases. Analysis of existing prostate cancer cohorts revealed ERF deletions in 3% of primary prostate cancers and mutations or deletions in ERF in 3-5% of lethal castration-resistant prostate cancers...
May 17, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28514973/olfactory-evaluation-of-boar-taint-effect-of-factors-measured-at-slaughter-and-link-with-boar-taint-compounds
#10
E Heyrman, S Millet, F A M Tuyttens, B Ampe, S Janssens, N Buys, J Wauters, L Vanhaecke, M Aluwé
There is a commitment by the European pig sector to ban surgical castration of male piglets in the European Union in 2018. One alternative to castration is to raise entire male pigs, with an increased risk of boar taint. A field study was performed to: (1) evaluate inter- and intra-farm variation in boar taint prevalence, (2) investigate factors measured at slaughter influencing boar taint and (3) evaluate the relationship between sensorial scoring by a trained panel and the concentration of boar taint components...
May 18, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28508918/-local-anaesthesia-in-ruminants
#11
Karl Nuss, Andrea Schwarz, Simone Ringer
The use of local anaesthesia in ruminants allows many surgical procedures to be conducted free of pain, efficiently and inexpensively in the field. Local anaesthesia combined with sedation and immobilisation of the animal can replace general anaesthesia for many procedures (e. g. castration, claw amputation). The level of difficulty differs among various local anaesthetic techniques: local infiltration of tissue or anaesthesia of the cornual nerve are easily performed, whereas local anaesthesia of the eye, regional anaesthesia in limbs or anaesthesia for umbilical surgery are more difficult to carry out...
May 16, 2017: Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere
https://www.readbyqxmd.com/read/28505901/re-activation-of-notch1-synergizes-with-multiple-pathways-in-promoting%C3%A2-castration-resistant-prostate-cancer
#12
Anthony Atala
No abstract text is available yet for this article.
June 2017: Journal of Urology
https://www.readbyqxmd.com/read/28502694/phase-ii-trial-of-the-pi3-kinase-inhibitor-buparlisib-bkm-120-with-or-without-enzalutamide-in-men-with-metastatic-castration-resistant-prostate-cancer
#13
Andrew J Armstrong, Susan Halabi, Patrick Healy, Joshi J Alumkal, Carolyn Winters, Julie Kephart, Rhonda L Bitting, Carey Hobbs, Colleen F Soleau, Tomasz M Beer, Rachel Slottke, Kelly Mundy, Evan Y Yu, Daniel J George
BACKGROUND: Phosphatidylinositol-3-kinase (PI3K) and androgen receptor pathway activation is common in metastatic castration resistant prostate cancer (mCRPC). Buparlisib is an oral, pan-class I PI3 kinase inhibitor. METHODS: This was a multisite single arm phase II trial of buparlisib 100 mg ± enzalutamide daily in men with mCRPC whose disease progressed on or who were not candidates for docetaxel. The primary end-point was the rate of radiographic/clinical progression-free survival (PFS) at 6 months...
May 11, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28501574/androgen-production-in-pediatric-adrenocortical-tumors-may-occur-via-both-the-classic-and-or-the-alternative-backdoor-pathway
#14
Nesa Marti, Jana Malikova, José A Galván, Maude Aebischer, Marco Janner, Zdenek Sumnik, Barbora Obermannova, Genevieve Escher, Aurel Perren, Christa E Flück
Children with adrenocortical tumors (ACTs) often present with virilization due to high tumoral androgen production, with dihydrotestosterone (DHT) as most potent androgen. Recent work revealed two pathways for DHT biosynthesis, the classic and the backdoor pathway. Usage of alternate routes for DHT production has been reported in castration-resistant prostate cancer, CAH and PCOS. To assess whether the backdoor pathway may contribute to the virilization of pediatric ACTs, we investigated seven children suffering from androgen producing tumors using steroid profiling and immunohistochemical expression studies...
May 10, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28498618/phase-i-clinical-trial-of-cell-division-associated-1-cdca1-peptide-vaccination-for-castration-resistant-prostate-cancer
#15
Wataru Obara, Fuminori Sato, Kazuyoshi Takeda, Renpei Kato, Yoichiro Kato, Mitsugu Kanehira, Ryo Takata, Hiromitsu Mimata, Tamotsu Sugai, Yusuke Nakamura, Tomoaki Fujioka
We screened cell division associated 1 (CDCA1) as an oncogene that is overexpressed on several cancers, including prostate cancer. We also identified a highly immunogenic HLA-A*2402-restricted epitope peptide corresponding to part of the CDCA1 protein. We conducted a phase I clinical trial for patients with castration resistant prostate cancer (CRPC) using a CDCA1 peptide vaccination. Twelve patients having HLA-A*2402 with CRPC after failure of docetaxel chemotherapy were enrolled. They received subcutaneous administration of the CDCA1 peptide as an emulsion with Montanide ISA51VG once a week in a dose-escalation manner (doses of 1...
May 12, 2017: Cancer Science
https://www.readbyqxmd.com/read/28498452/calpain-and-ar-v7-two-potential-therapeutic-targets-to-overcome-acquired-docetaxel-resistance-in-castration-resistant-prostate-cancer-cells
#16
Lei Liu, Ning Lou, Xiang Li, Guanghua Xu, Hailong Ruan, Wen Xiao, Bin Qiu, Lin Bao, Changfei Yuan, Xinmian Huang, Keshan Wang, Qi Cao, Ke Chen, Hongmei Yang, Xiaoping Zhang
Docetaxel-based chemotherapy has been widely used as the first-line treatment for castration-resistant prostate cancer (CRPC) patients. However, the mechanisms of docetaxel-resistance remain unclear. In the present study with the establishment of 2 in vitro models of docetaxel-resistant CRPC cell sublines, we firstly reported that activation of calpain may play a promotional role in the resistance of docetaxel in prostate cancer, meanwhile using the calpain inhibitor combined with docetaxel improved the efficiency of docetaxel in docetaxel-resistant cell sublines...
May 4, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28497777/phase-i-ii-clinical-trial-to-assess-safety-and-efficacy-of-intratumoral-and-subcutaneous-injection-of-hvj-e-in-castration-resistant-prostate-cancer-patients
#17
K Fujita, Y Nakai, A Kawashima, T Ujike, A Nagahara, T Nakajima, T Inoue, C M Lee, M Uemura, Y Miyagawa, Y Kaneda, N Nonomura
Inactivated Sendai virus particles (hemagglutinating virus of Japan envelope (HVJ-E)) have a novel antitumor effect: HVJ-E fused to prostate cancer cells via cell surface receptor causes apoptosis of prostate cancer cells in vitro and in vivo. HVJ-E also induces antitumor immunity by activating natural killer (NK) cells and cytotoxic T cells and suppressing regulatory T cells in vivo. We conducted an open-label, single-arm, phase I/II clinical trial in patients with castration-resistant prostate cancer (CRPC) to determine the safety and efficacy of intratumoral and subcutaneous injection of HVJ-E...
May 12, 2017: Cancer Gene Therapy
https://www.readbyqxmd.com/read/28495454/intratesticular-and-incisional-line-infiltration-with-ropivacaine-for-castration-in-medetomidine-butorphanol-midazolam-sedated-dogs
#18
Yishai Kushnir, Noa Toledano, Liat Cohen, Tali Bdolah-Abram, Yael Shilo-Benjamini
OBJECTIVE: To evaluate whether intratesticular and incisional ropivacaine infiltration produces sufficient intra- and postoperative analgesia for castrating dogs under sedation. STUDY DESIGN: Randomized, blinded, controlled clinical study. ANIMALS: Twenty-three healthy dogs weighing 5.8-35.6 kg admitted for castration. METHODS: Dogs were sedated with medetomidine (0.01 mg kg(-1)), butorphanol (0.2 mg kg(-1)) and midazolam (0...
January 11, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28494009/postnatal-changes-and-sexual-dimorphism-in-collagen-expression-in-mouse-skin
#19
Koji Y Arai, Takuya Hara, Toyofumi Nagatsuka, Chikako Kudo, Sho Tsuchiya, Yoshihiro Nomura, Toshio Nishiyama
To investigate sexual dimorphism and postnatal changes in skin collagen expression, mRNA levels of collagens and their regulatory factors in male and female skin were examined during the first 120 days of age by quantitative realtime PCR. Levels of mRNAs encoding extracellular matrices did not show any differences between male and female mice until day 15. Col1a1 and Col1a2 mRNAs noticeably increased at day 30 and remained at high levels until day 120 in male mice, while those in female mice remained at low levels during the period...
2017: PloS One
https://www.readbyqxmd.com/read/28493842/mesenchymal-stem-cell-infiltration-during-neoplastic-transformation-of-the-human-prostate
#20
W Nathaniel Brennen, Baohui Zhang, Ibrahim Kulac, L Nelleke Kisteman, Lizamma Antony, Hao Wang, Alan K Meeker, Angelo M De Marzo, Isla P Garraway, Samuel R Denmeade, John T Isaacs
Mesenchymal Stem Cells (MSCs) have been identified in prostate cancer, raising the critical question of their physical and temporal source. Therefore, MSCs were quantified and characterized in benign and malignant prostate tissue representing different disease states and a wide range of age groups from fetal development through adult death using analytical and functional methodologies. In contrast to lineage-restricted Mesenchymal Progenitor Cells (MPCs) found in normal prostate tissue, MSCs with tri-lineage differentiation potential (adipogenesis, osteogenesis, and chondrogenesis) are identified in prostate tissue from a subset of men with prostate cancer, consistent with an influx of more stem-like progenitors (i...
April 21, 2017: Oncotarget
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