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PSA kinetics

Amalia Katafigioti, Ioannis Katafigiotis, Stavros Sfoungaristos, Christos Alamanis, Konstantinos Stravodimos, Ioannis Anastasiou, Eleni Roumelioti, Mordechai Duvdevani, Constantinos Constantinides
OBJECTIVE: To search which category of proteins can be detected in urine in order to examine subsequently its ability to improve our accuracy for the diagnosis of Prostate Cancer (PCa) as biomarkers in clinical useful fluids like urine and serum. Material and method(s): Urine samples of 127 patients were obtained after a vigorous transrectal prostatic massage to both lobes. The patients were considered to have a high risk for PCa according to their PSA (> 4 ng/ml), their digital rectal examination (DRE) (positive for suspicious prostatic lesions) or to their abnormal PSA kinetics (PSA velocity (PSAV > 0...
October 5, 2016: Archivio Italiano di Urologia, Andrologia
Daniel M Moreira, Lauren E Howard, Katharine N Sourbeer, Hiruni S Amarasekara, Lydia C Chow, Dillon C Cockrell, Connor L Pratson, Brian T Hanyok, William J Aronson, Christopher J Kane, Martha K Terris, Christopher L Amling, Matthew R Cooperberg, Stephen J Freedland
OBJECTIVE: To identify the predictors of time from initial diagnosis of metastatic castration-resistance prostate cancer (mCRPC) to all-cause death within the Shared Equal Access Regional Cancer Hospital cohort. PATIENTS AND METHODS: We performed a retrospective analysis of 205 mCRPC men. Overall survival was estimated and plotted using the Kaplan-Meier method. The uni- and multivariable overall survival predictors were evaluated with the Cox proportional hazards model...
August 31, 2016: Clinical Genitourinary Cancer
J Wang, D Zhao, D Veruttipong, P A Kupelian, M L Steinberg, C R King
No abstract text is available yet for this article.
October 1, 2016: International Journal of Radiation Oncology, Biology, Physics
D Nathan Kim, Christopher Straka, L Chinsoo Cho, Yair Lotan, Jingsheng Yan, Brian Kavanagh, David Raben, Susan Cooley, Jeffrey Brindle, Xian Jin Xie, David Pistenmaa, Robert Timmerman
PURPOSE: We hypothesized that high-dose stereotactic body radiation therapy (SBRT) would lead to faster time to nadir and lower nadir values compared with conventional radiation therapy experiences. We now report prostate-specific antigen (PSA) kinetics following high-dose SBRT in patients treated with radiation alone. METHODS AND MATERIALS: Ninety-one patients were enrolled on the phase 1/2 dose escalation study of SBRT for localized prostate cancer. All patients with at least 36 months of follow-up and without hormone therapy were included in this analysis (n = 47)...
June 24, 2016: Practical Radiation Oncology
Minoru Kobayashi, Akinori Nukui, Takao Kamai
BACKGROUND: It is common to repeat prostate-specific antigen (PSA) measurements for men with intermediate PSA elevation before prostate biopsy. In this scenario, men with persistently elevated PSA values may have considerable psychological distress. We attempted to determine whether elevated PSA values have psychological effects on these men in association with the timing of measurement, PSA kinetics, and biopsy results. METHODS: In order to investigate the initial and late effects of PSA tests on psychological distress during serial measurements, two groups of men with screen-positive results (PSA ≥3 ng/ml) were studied-205 men whose first questionnaires regarding anxiety and depression were taken at initial screening (group A), and 103 men whose questionnaires were taken at repeated measurement for prior PSA elevation (group B)...
September 8, 2016: International Journal of Clinical Oncology
Yujiro Ueda, Nobuaki Matsubara, Ken-Ichi Tabata, Takefumi Satoh, Naoto Kamiya, Hiroyoshi Suzuki, Takashi Kawahara, Hiroji Uemura
BACKGROUND: Prostate-specific antigen (PSA) flare is a well-known phenomenon in patients with prostate cancer treated with luteinizing hormone-releasing hormone agonist and chemotherapy. However, its incidence and the significance for the clinical outcomes of patients treated with abiraterone acetate (AA) are uncertain. PATIENTS AND METHODS: A multicenter retrospective analysis of chemotherapy-naive patients treated with AA for metastatic castration-resistant prostate cancer (mCRPC) was conducted...
August 8, 2016: Clinical Genitourinary Cancer
Muhammad Azri Mohd Noh, Khalisanni Khalid, Azhar Ariffin, Mohammad Niyaz Khan
The present study is focused on the effect of the TTABr/MX/H2O-nanoparticles on the rate of piperidinolysis of ionized phenyl salicylate where TTABr represents tetradecyltrimethylammonium bromide and MX = NaCl, NaBr and CnH2n+1CO2Na with n = 4, 5, 6 and 7. Pseudo-first-order rate constant for the piperidinolysis of ionized phenyl salicylate at 35°C and constant concentration [PSa(-)]T = 0.2 mM, [Pip]T = 0.1 M, [NaOH] = 30 mM, [TTABr]T and different [MX] follow an empirical relationship which gives two empirical constant, (X)kcat and K(X/S)...
2016: Journal of Oleo Science
Marie-Aude Robert de Rancher, Jean-Baptiste Oudart, François-Xavier Maquart, Jean Claude Monboisse, Laurent Ramont
Tumor marker assays are daily practiced, for screening and follow up of cancers. Interassay precision is an important parameter for the interpretation of the kinetics of the markers, in order to conclude to the efficiency or failure of treatment. The aim of this study was to compare two automated Immunoassay analyzers, Lumipulse® G1200 and AIA® 2000. Both analyzers used an immunoassay system but with different antibodies. Six tumor markers commonly used were studied: AFP, PSA, CA 19-9, CA 15-3, CA 125 and CEA...
August 10, 2016: Clinical Biochemistry
Johanna M M van Breugel, Joost W Wijlemans, Hermanus H B Vaessen, Martijn de Greef, Chrit T W Moonen, Maurice A A J van den Bosch, Mario G Ries
BACKGROUND: Previous studies demonstrated both pre-clinically and clinically the feasibility of magnetic resonance-guided high-intensity focused ultrasound (MR-HIFU) ablations in the liver. To overcome the associated problem of respiratory motion of the ablation area, general anesthesia (GA) and mechanical ventilation was used in conjunction with either respiratory-gated energy delivery or energy delivery during induced apnea. However, clinical procedures requiring GA are generally associated with increased mortality, morbidity, and complication rate compared to procedural sedation and analgesia (PSA)...
2016: Journal of Therapeutic Ultrasound
Seok Ho Lee, Hun Jung Kim, Woo Chul Kim
AIM: The purpose of this study was to compare the prostate-specific antigen (PSA) kinetics between stereotactic body radiotherapy (SBRT) using Cyberknife and conventionally fractionated external beam radiotherapy (CF-EBRT) in low- and intermediate-risk prostate cancer. METHODS: A total of 69 patients with low- and intermediate-risk prostate cancer were enrolled. Thirty-four patients were treated with SBRT (36.25 Gy in five fractions) using Cyberknife and 35 patients treated with CF-EBRT (70...
July 27, 2016: Asia-Pacific Journal of Clinical Oncology
Pol Servian, Ana Celma, Jacques Planas, José Placer, Inés M de Torres, Juan Morote
PURPOSE: To analyze the association between prostatic proliferative inflammatory atrophy finding in negative prostate biopsies and future detection of prostate cancer (PCa) and its aggressiveness in men subjected to repeat biopsies, due to persistent suspicion of PCa. MATERIALS AND METHODS: Prospective and observational study of 474 men scheduled to repeated PBs. Assessment of PIA and its extension in the previous biopsy. PCa detection rate and tumor aggressiveness...
July 12, 2016: Prostate
Masahiko Nakayama, Hisanori Kobayashi, Tomihiro Takahara, Ryo Oyama, Keiichiro Imanaka, Kazutake Yoshizawa
BACKGROUND: Previous studies have demonstrated an association between prostate-specific antigen (PSA) kinetics and predictive value for treatment outcomes. Abiraterone acetate (AA) is a newly approved cytochrome-P450C17 inhibitor for treatment of metastatic castration-resistant prostate cancer (mCRPC), and few studies have evaluated PSA kinetics using AA so far. Results of a study evaluating PSA kinetics in the beginning of AA and enzalutamide responded chemotherapy-treated patients suggested different trends between the drugs...
2016: BMC Urology
Solène Desmée, France Mentré, Christine Veyrat-Follet, Bernard Sébastien, Jérémie Guedj
Joint modeling is increasingly popular for investigating the relationship between longitudinal and time-to-event data. However, numerical complexity often restricts this approach to linear models for the longitudinal part. Here, we use a novel development of the Stochastic-Approximation Expectation Maximization algorithm that allows joint models defined by nonlinear mixed-effect models. In the context of chemotherapy in metastatic prostate cancer, we show that a variety of patterns for the Prostate Specific Antigen (PSA) kinetics can be captured by using a mechanistic model defined by nonlinear ordinary differential equations...
May 5, 2016: Biometrics
Viacheslav Iremashvili, Bruce R Kava, Murugesan Manoharan, Dipen J Parekh, Sanoj Punnen
OBJECTIVE: To identify factors that are not available at the time of prostate cancer diagnosis and are associated with the risk of biopsy progression in active surveillance (AS) patients. MATERIALS AND METHODS: The study included 314 AS patients who had at least 1 repeat biopsy. We used logistic regression to analyze the association between prostate-specific antigen (PSA) and its derivatives, including PSA density, PSA velocity (PSAV) and doubling time (PSADT); presence of bilateral disease and number of previous successive negative surveillance biopsies; and the risk of progression on the surveillance biopsies first through fourth...
September 2016: Urology
Jeong Hoon Phak, Hun Jung Kim, Woo Chul Kim
BACKGROUND: Stereotactic body radiotherapy (SBRT) has emerged as an effective treatment for localized prostate cancer. The purpose of this study was to compare the prostate-specific antigen (PSA) kinetics between conventionally fractionated external beam radiotherapy (CF-EBRT) and SBRT boost after whole pelvis EBRT (WP-EBRT) in localized prostate cancer. METHODS: A total of 77 patients with localized prostate cancer [T-stage, T1-T3; Gleason score (GS) 5-9; PSA < 20 ng/mL] were enrolled...
March 2016: Prostate International
Hun Jung Kim, Jeong Hoon Phak, Woo Chul Kim
AIM: Stereotactic body radiotherapy (SBRT) has emerged as an effective treatment for localized prostate cancer. However, prostate specific antigen (PSA) kinetics after SBRT has not been well characterized. The objective of the current study is to analyze the rate of PSA decline and PSA nadir following SBRT boost after whole pelvis radiotherapy (WPRT) in intermediate- and high-risk prostate cancer. METHODS: From March 2008 to July 2014, 42 patients newly diagnosed, intermediate- and high-risk (NCCN definition) localized prostate cancer were treated with SBRT boost using Cyberknife after WPRT...
March 10, 2016: Asia-Pacific Journal of Clinical Oncology
Monica A Kapil, Yuchen Pan, Todd A Duncombe, Amy E Herr
High throughput, efficient, and readily adoptable analytical tools for the validation and selection of reliable antibody reagents would impact the life sciences, clinical chemistry, and clinical medicine. To directly quantify antibody-antigen association and dissociation rate constants, kon and koff, in a single experiment, we introduce a microfluidic free-standing kinetic polyacrylamide gel electrophoresis (fsKPAGE) assay. Here, an antibody is immobilized in zones along the length of a single freestanding polyacrylamide gel lane of varying cross-sectional width...
April 5, 2016: Analytical Chemistry
Giuseppe Colloca, Antonella Venturino, Domenico Guarneri
OBJECTIVES: The role of the tumor growth fraction has been investigated poorly in metastatic castration-resistant prostate cancer (mCRPC). The aim of this study was to assess whether some prostate-specific antigen (PSA)-related variables of tumor cell kinetics predict the overall survival in early and late mCRPC, and to explore changes in the tumor growth fraction after chemotherapy. METHODS: A retrospective analysis of 3 tumor cell kinetic variables in patients with mCRPC receiving first-line chemotherapy has been performed...
February 15, 2016: American Journal of Clinical Oncology
Leah Shepherd, Álvaro H Borges, Lene Ravn, Richard Harvey, Mark Bower, Andrew Grulich, Michael Silverberg, Gitte Kronborg, Massimo Galli, Ole Kirk, Jens Lundgren, Amanda Mocroft
BACKGROUND: It is common practice to use PSA≥4.0 µg/L as a clinical indicator for men at risk of PCa, however this is unverified in HIV + men. We aimed to describe kinetics and predictive value of PSA for prostate-cancer (PCa) in HIV+ men. METHODS: A nested-case-control study of 21 men with PCa and 40 matched-controls within EuroSIDA was conducted. Prospectively stored plasma samples before PCa (or matched date in controls) were measured for the following markers: Total PSA[tPSA], free PSA[fPSA], testosterone and sex hormone binding globulin[SHB]...
January 29, 2016: Antiviral Therapy
Félicité de Charry, Olivier Colomban, Benoit You, Alain Ruffion, Philippe Paparel, Mélanie Wilbaux, Michel Tod, Gilles Freyer, Paul Perrin
BACKGROUND: Tools for differentiating aggressive and indolent prostate carcinoma (PCa) are needed. Mathematical modeling is a promising approach for longitudinal analysis of tumor marker kinetics. PATIENTS AND METHODS: The prostate-specific antigen (PSA) increases from patients with PCa and those with benign prostatic hyperplasia (BPH) were retrospectively analyzed using a mathematical model. Using the NONMEM program, individual PSA kinetics were fit to the following equation: [d(PSA)/dt = (PROD...
June 2016: Clinical Genitourinary Cancer
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