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Pauls JP, Miotto A, Stephens A, Gregory SD, Tansley G. OpenHeart Project-An Open-Source Research Community in the Field of Mechanical Circulatory Support. Artif Organs 2019; 42:939-942. [PMID: 30375678 DOI: 10.1111/aor.13361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/14/2018] [Indexed: 12/18/2022]
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Boone AC, Gregory SD, Wu EL, Stephens A, Liao S, Pauls JP, Salamonsen R, Fraser J, Tansley GD. Evaluation of an intraventricular balloon pump for short-term support of patients with heart failure. Artif Organs 2019; 43:860-869. [PMID: 30868602 DOI: 10.1111/aor.13454] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 03/01/2019] [Accepted: 03/04/2019] [Indexed: 12/22/2022]
Abstract
The high cost of ventricular assist devices results in poor cost-effectiveness when used as a short-term bridging solution, thus a low-cost alternative is desirable. The present study aimed to develop an intraventricular balloon pump (IVBP) for short-term circulatory support, and to evaluate the effect of balloon actuation timing on the degree of cardiac support provided to a simulated in vitro severe heart failure (SHF) patient. A silicone IVBP was designed to avoid contact with internal left ventricular (LV) features (ie, papillary muscles, chordae, aortic, and mitral valves) based on LV computed tomography data of 10 SHF patients with dilated cardiomyopathy. The hemodynamic effects of varying balloon inflation and deflation timing parameters (inflation duty [D] and end-inflation point [σ]) were evaluated in a purpose-built systemic mock circulatory loop. Three IVBP actuation timing categories were defined: co-, transitional, and counterpulsation. Compared to the SHF baseline, co-pulsation increased aortic flow from 3.5 to 5.2 L/min, mean arterial pressure from 72.1 to 94.8 mmHg and ejection fraction from 14.4% to 21.5%, while mean left atrial pressure decreased from 14.6 to 10 mmHg. Transitional and counterpulsation resulted in a double ventricular pulse and extended the duration of increased ventricular pressure, potentially impeding diastolic filling and coronary perfusion. This in vitro study showed the IVBP could restore the hemodynamic balance of a simulated SHF patient with dilated cardiomyopathy to healthy levels.
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Moffitt L, Karimnia N, Stephens A, Bilandzic M. Therapeutic Targeting of Collective Invasion in Ovarian Cancer. Int J Mol Sci 2019; 20:E1466. [PMID: 30909510 PMCID: PMC6471817 DOI: 10.3390/ijms20061466] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/14/2019] [Accepted: 03/15/2019] [Indexed: 12/31/2022] Open
Abstract
Ovarian cancer is the seventh most commonly diagnosed cancer amongst women and has the highest mortality rate of all gynaecological malignancies. It is a heterogeneous disease attributed to one of three cell types found within the reproductive milieu: epithelial, stromal, and germ cell. Each histotype differs in etiology, pathogenesis, molecular biology, risk factors, and prognosis. Furthermore, the origin of ovarian cancer remains unclear, with ovarian involvement secondary to the contribution of other gynaecological tissues. Despite these complexities, the disease is often treated as a single entity, resulting in minimal improvement to survival rates since the introduction of platinum-based chemotherapy over 30 years ago. Despite concerted research efforts, ovarian cancer remains one of the most difficult cancers to detect and treat, which is in part due to the unique mode of its dissemination. Ovarian cancers tend to invade locally to neighbouring tissues by direct extension from the primary tumour, and passively to pelvic and distal organs within the peritoneal fluid or ascites as multicellular spheroids. Once at their target tissue, ovarian cancers, like most epithelial cancers including colorectal, melanoma, and breast, tend to invade as a cohesive unit in a process termed collective invasion, driven by specialized cells termed "leader cells". Emerging evidence implicates leader cells as essential drivers of collective invasion and metastasis, identifying collective invasion and leader cells as a viable target for the management of metastatic disease. However, the development of targeted therapies specifically against this process and this subset of cells is lacking. Here, we review our understanding of metastasis, collective invasion, and the role of leader cells in ovarian cancer. We will discuss emerging research into the development of novel therapies targeting collective invasion and the leader cell population.
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Hobson C, Nelsen EF, Hsiao J, Stephens A, Timothy O'Brien E, Falvo MR, Superfine R. Nuclear Deformation with Combined AFM and 3D Multi-Color Live-Cell Line Bessel Sheet Imaging. Biophys J 2019. [DOI: 10.1016/j.bpj.2018.11.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Leung DTH, Rainczuk A, Nguyen T, Stephens A, Silke J, Fuller PJ, Chu S. Targeting XIAP and PPARγ in Granulosa Cell Tumors Alters Metabolic Signaling. J Proteome Res 2019; 18:1691-1702. [DOI: 10.1021/acs.jproteome.8b00917] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Brunner C, Botten J, Wennike N, Ford L, Michaels K, Stephens A, Baker R. Early Supported Discharge for patients with febrile neutropenia - Experience at a large district hospital in the UK. Acute Med 2019; 18:14-19. [PMID: 32608388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Neutropenic sepsis can be life threatening, with mortality 2-21%. The heterogeneity of patients referred with "suspected neutropenic sepsis" has led to strategies being developed to risk-stratify patients and identify those with a low risk of septic complications that could be managed in the outpatient setting, such as The Multinational Association for Supportive Care in Cancer score (MASCC). Outcomes for patients referred with suspected neutropenic sepsis were assessed before and after use of MASCC guided early-supported discharge. 50/123 (41%) patients over 24 months were eligible for early-supported discharge. 26/50 patients had same-day discharge, 14 had overnight admission, 8 stayed 2 nights and 2 stayed 3 nights. Patients received on average 2 follow-up telephone consultations. There were 5 readmissions (10%) and no adverse events. In comparison group; 8 patients over 3-months would have been suitable, potentially saving 40 bed-days. This shows MASCC guided early-supported discharge is safe and cost-effective.
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Goldstein E, Ertekin-Taner N, Stephens A, Carrasquillo M, Boeve B, Tatum W, Feyissa A. Electroencephalogram findings in patients with posterior cortical atrophy. Neurol Neurochir Pol 2018; 52:690-694. [DOI: 10.1016/j.pjnns.2018.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 09/22/2018] [Accepted: 09/22/2018] [Indexed: 11/15/2022]
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Frisoni GB, Barkhof F, Altomare D, Berkhof J, Boccardi M, Canzoneri E, Collij L, Drzezga A, Farrar G, Garibotto V, Gismondi R, Gispert JD, Jessen F, Kivipelto M, Lopes Alves I, Molinuevo JL, Nordberg A, Payoux P, Ritchie C, Savicheva I, Scheltens P, Schmidt ME, Schott JM, Stephens A, van Berckel B, Vellas B, Walker Z, Raffa N. AMYPAD Diagnostic and Patient Management Study: Rationale and design. Alzheimers Dement 2018; 15:388-399. [PMID: 30339801 DOI: 10.1016/j.jalz.2018.09.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 08/27/2018] [Accepted: 09/06/2018] [Indexed: 01/09/2023]
Abstract
INTRODUCTION Reimbursement of amyloid-positron emission tomography (PET) is lagging due to the lack of definitive evidence on its clinical utility and cost-effectiveness. The Amyloid Imaging to Prevent Alzheimer's Disease-Diagnostic and Patient Management Study (AMYPAD-DPMS) is designed to fill this gap. METHODS AMYPAD-DPMS is a phase 4, multicenter, prospective, randomized controlled study. Nine hundred patients with subjective cognitive decline plus, mild cognitive impairment, and dementia possibly due to Alzheimer's disease will be randomized to ARM1, amyloid-PET performed early in the diagnostic workup; ARM2, amyloid-PET performed after 8 months; and ARM3, amyloid-PET performed whenever the physician chooses to do so. ENDPOINTS The primary endpoint is the difference between ARM1 and ARM2 in the proportion of patients receiving a very-high-confidence etiologic diagnosis after 3 months. Secondary endpoints address diagnosis and diagnostic confidence, diagnostic/therapeutic management, health economics and patient-related outcomes, and methods for image quantitation. EXPECTED IMPACTS AMYPAD-DPMS will supply physicians and health care payers with real-world data to plan management decisions.
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de Wilde A, van Buchem MM, Otten RHJ, Bouwman F, Stephens A, Barkhof F, Scheltens P, van der Flier WM. Disclosure of amyloid positron emission tomography results to individuals without dementia: a systematic review. ALZHEIMERS RESEARCH & THERAPY 2018; 10:72. [PMID: 30055660 PMCID: PMC6064628 DOI: 10.1186/s13195-018-0398-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Background Disclosure of amyloid positron emission tomography (PET) results to individuals without dementia has become standard practice in secondary prevention trials and also increasingly occurs in clinical practice. However, this is controversial given the current lack of understanding of the predictive value of a PET result at the individual level and absence of disease-modifying treatments. In this study, we systematically reviewed the literature on the disclosure of amyloid PET in cognitively normal (CN) individuals and patients with mild cognitive impairment (MCI) in both research and clinical settings. Methods We performed a systematic literature search of four scientific databases. Two independent reviewers screened the identified records and selected relevant articles. Included articles presented either empirical data or theoretical data (i.e. arguments in favor or against amyloid status disclosure). Results from the theoretical data were aggregated and presented per theme. Results Of the seventeen included studies, eleven reported empirical data and six provided theoretical arguments. There was a large variation in the design of the empirical studies, which were almost exclusively in the context of cognitively normal trial participants, comprising only two prospective cohort studies quantitatively assessing the psychological impact of PET result disclosure which showed a low risk of psychological harm after disclosure. Four studies showed that both professionals and cognitively normal individuals support amyloid PET result disclosure and underlined the need for clear disclosure protocols. From the articles presenting theoretical data, we identified 51 ‘pro’ and ‘contra’ arguments. Theoretical arguments in favor or against disclosure were quite consistent across population groups and settings. Arguments against disclosure focused on the principle of non-maleficence, whereas its psychological impact and predictive value is unknown. Important arguments in favor of amyloid disclosure are the patients right to know (patient autonomy) and that it enables early future decision making. Discussion Before amyloid PET result disclosure in individuals without dementia in a research or clinical setting is ready for widespread application, more research is needed about its psychological impact, and its predictive value at an individual level. Finally, communication materials and strategies to support disclosure of amyloid PET results should be further developed and prospectively evaluated. Electronic supplementary material The online version of this article (10.1186/s13195-018-0398-3) contains supplementary material, which is available to authorized users.
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Bozas G, Jeffery N, Ramanujam-Venkatachala D, Avery G, Stephens A, Moss H, Palmer J, Elliott M, Maraveyas A. Correction to: Prognostic assessment for patients with cancer and incidental pulmonary embolism. Thromb J 2018; 16:15. [PMID: 29692431 PMCID: PMC5905154 DOI: 10.1186/s12959-018-0169-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 04/06/2018] [Indexed: 11/10/2022] Open
Abstract
[This corrects the article DOI: 10.1186/s12959-017-0157-x.].
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Bozas G, Jeffery N, Ramanujam-Venkatachala D, Avery G, Stephens A, Moss H, Palmer J, Elliott M, Maraveyas A. Prognostic assessment for patients with cancer and incidental pulmonary embolism. Thromb J 2018; 16:8. [PMID: 29445314 PMCID: PMC5802055 DOI: 10.1186/s12959-017-0157-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 12/21/2017] [Indexed: 12/18/2022] Open
Abstract
Background An incidental/unsuspected diagnosis of pulmonary embolism (IPE) in cancer patients is a frequent occurrence. This single-institution analysis of uniformly managed patients investigates short and long-term outcomes and proposes a prognostic risk score, aiming to assist clinical decision-making. Methods Data from a prospectively recorded cohort of 234 consecutive cancer patients with IPE were analysed. Multivariate logistic regression and the Cox regression survival methods were used to identify factors with independent association with early (30-day, 3-month, 6-month) mortality and survival. Receiver operator characteristic analysis (ROC) was used to assess appropriate cut-offs for continuous variables and the fitness of prognostic scoring. Results 30-day, 3-month and 6-month mortality was 3.4% (n = 8), 15% (n = 35) and 31% (n = 72) respectively. Recurrence during anticoagulation occurred in 2.6% (n = 6) and major haemorrhage in 2.1% (n = 5) of the patients. A prognostic score incorporating performance status (0 vs 1–2 vs 3–4) and the presence of new or worsening symptoms, with and without the consideration of the presence of incurable malignancy, correlated with overall survival (p < .001 respectively) as well as early mortality (AUC = .821, p = .004 and AUC = .805, p = 0.006, respectively). Conclusion A simple prognostic score incorporating basic oncologic clinical assessment and self-reported symptomatology could reliably stratify the mortality risk of ambulant cancer patients and IPE. Trial registration Audit registration No. 2013.287, Hull and East Yorkshire Hospitals Trust, 29/11/2013. Electronic supplementary material The online version of this article (10.1186/s12959-017-0157-x) contains supplementary material, which is available to authorized users.
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Stephens A. Reply: Regarding “ 18F-GP1, a Novel PET Tracer Designed for High-Sensitivity, Low-Background Detection of Thrombi”. J Nucl Med 2018; 59:351. [DOI: 10.2967/jnumed.117.203687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Zimmermann L, Stephens A, Nam SZ, Rau D, Kübler J, Lozajic M, Gabler F, Söding J, Lupas AN, Alva V. A Completely Reimplemented MPI Bioinformatics Toolkit with a New HHpred Server at its Core. J Mol Biol 2017; 430:2237-2243. [PMID: 29258817 DOI: 10.1016/j.jmb.2017.12.007] [Citation(s) in RCA: 1546] [Impact Index Per Article: 220.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 12/10/2017] [Accepted: 12/11/2017] [Indexed: 12/12/2022]
Abstract
The MPI Bioinformatics Toolkit (https://toolkit.tuebingen.mpg.de) is a free, one-stop web service for protein bioinformatic analysis. It currently offers 34 interconnected external and in-house tools, whose functionality covers sequence similarity searching, alignment construction, detection of sequence features, structure prediction, and sequence classification. This breadth has made the Toolkit an important resource for experimental biology and for teaching bioinformatic inquiry. Recently, we replaced the first version of the Toolkit, which was released in 2005 and had served around 2.5 million queries, with an entirely new version, focusing on improved features for the comprehensive analysis of proteins, as well as on promoting teaching. For instance, our popular remote homology detection server, HHpred, now allows pairwise comparison of two sequences or alignments and offers additional profile HMMs for several model organisms and domain databases. Here, we introduce the new version of our Toolkit and its application to the analysis of proteins.
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Ceccaldi M, Jonveaux T, Verger A, Krolak‐Salmon P, Houzard C, Godefroy O, Shields T, Perrotin A, Gismondi R, Bullich S, Jovalekic A, Raffa N, Pasquier F, Semah F, Dubois B, Habert M, Wallon D, Chastan M, Payoux P, Ceccaldi M, Guedj E, Ceccaldi M, Felician O, Didic M, Gueriot C, Koric L, Kletchkova‐Gantchev R, Guedj E, Godefroy O, Andriuta D, Devendeville A, Dupuis D, Binot I, Barbay M, Meyer M, Moullard V, Magnin E, Chamard L, Haffen S, Morel O, Drouet C, Boulahdour H, Goas P, Querellou‐Lefranc S, Sayette V, Cogez J, Branger P, Agostini D, Manrique A, Rouaud O, Bejot Y, Jacquin‐Piques A, Dygai‐Cochet I, Berriolo‐Riedinger A, Moreaud O, Sauvee M, Crépin CG, Pasquier F, Bombois S, Lebouvier T, Mackowiak‐Cordoliani M, Deramecourt V, Rollin‐Sillaire A, Cassagnaud‐Thuillet P, Chen Y, Semah F, Petyt G, Krolak‐Salmon P, Federico D, Danaila KL, Guilhermet Y, Magnier C, Makaroff Z, Rouch I, Xie J, Roubaud C, Coste M, David K, Sarciron A, Waissi AS, Scheiber C, Houzard C, Gabelle‐Deloustal A, Bennys K, Marelli C, Touati L, Mariano‐Goulart D, Verbizier‐Lonjon D, Jonveaux T, Benetos A, Kearney‐Schwartz A, Perret‐Guillaume C, Verger A, Vercelletto M, Boutoleau‐Bretonniere C, Pouclet‐Courtemanche H, Wagemann N, Pallardy A, Hugon J, Paquet C, Dumurgier J, Millet P, Queneau M, Dubois B, Epelbaum S, Levy M, Habert M, Novella J, Jaidi Y, Papathanassiou D, Morland D, Belliard S, Salmon A, Lejeune F, Hannequin D, Wallon D, Martinaud O, Zarea A, Chastan M, Pariente J, Thalamas C, Galitzky‐Gerber M, Tricoire Ricard A, Calvas F, Rigal E, Payoux P, Hitzel A, Delrieu J, Ousset P, Lala F, Sastre‐Hengan N, Stephens A, Guedj E. Added value of
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F‐florbetaben amyloid PET in the diagnostic workup of most complex patients with dementia in France: A naturalistic study. Alzheimers Dement 2017; 14:293-305. [DOI: 10.1016/j.jalz.2017.09.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 08/29/2017] [Accepted: 09/06/2017] [Indexed: 11/25/2022]
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Dore V, Bullich S, Rowe CC, Bourgeat P, Konate S, Stephens A, Fripp J, Masters CL, Salvado O, Villemagne VL, Santi S. [IC‐P‐162]: COMPARISON OF
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F‐FLORBETABEN QUANTIFICATION RESULTS USING MR‐BASED AND MR‐LESS CAPAIBL: VALIDATION AGAINST HISTOPATHOLOGY. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.2537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wilde A, Pelkmans W, Bouwman FH, Verwer J, Groot C, Buchem M, Zwan MD, Ossenkoppele R, Yaqub MM, Kunneman M, Smets EM, Barkhof F, Lammertsma AA, Stephens A, Lier E, Biessels GJ, Berckel BN, Flier WM, Scheltens P. [DT‐01–02]: THE IMPACT OF AMYLOID PET ON DIAGNOSIS AND PATIENT MANAGEMENT IN AN UNSELECTED MEMORY CLINIC COHORT: THE ABIDE PROJECT. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Wilde A, Flier WM, Bouwman FH, Ossenkoppele R, Pelkmans W, Groot C, Zwan MD, Yaqub MM, Teunissen CE, Stephens A, Lammertsma AA, Berckel BN, Scheltens P. [P2–207]: CONCORDANCE BETWEEN CEREBROSPINAL FLUID AMYLOID‐β AND [
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F]FLORBETABEN PET IN AN UNSELECTED COHORT OF MEMORY CLINIC PATIENTS. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Frisoni GB, Barkhof F, Farrar G, Raffa N, Gismondi R, Schmidt ME, Berkhof J, Boccardi M, Walker Z, Scheltens P, Schott JM, Molinuevo JL, Vellas B, Jessen F, Nordberg A, Ritchie CW, Berckel BN, Dickson J, Gispert JD, Payoux P, Drzezga A, Macnaught G, Garibotto V, Savitcheva I, Stephens A. [P4–491]: THE AMYPAD‐DX CONTROLLED TRIAL ON THE DIAGNOSTIC VALUE OF AMYLOID PET. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.07.653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Barret O, Seibyl J, Stephens A, Madonia J, Alagille D, Mueller A, Berndt M, Kroth H, Capotosti F, Muhs A, Pfeifer A, Tamagnan G, Dinkelborg L, Marek K. [IC‐01–05]: FIRST‐IN‐HUMAN PET STUDIES WITH THE NEXT GENERATION TAU AGENT 18‐F PI‐2620 IN ALZHEIMER's DISEASE, PROGRESSIVE SUPRANUCLEAR PALSY, AND CONTROLS. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.2625] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Farrar G, Barkhof F, Pla S, Gispert JD, Foley C, Mett A, Ritchie CW, Georges J, Stephens A, Schmidt ME, Van Der Geyten S, Frisoni GB. [P1–395]: AMYPAD: A EUROPEAN PUBLIC‐PRIVATE PARTNERSHIP TO INVESTIGATE THE VALUE OF β‐AMYLOID BRAIN SCANS AS A DIAGNOSTIC AND THERAPEUTIC MARKER FOR ALZHEIMER's DISEASE. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mueller A, Kroth H, Schieferstein H, Berndt M, Oden F, Capotosti F, Molette J, Juergens T, Darmency V, Schmitt‐Willich H, Hickman D, Tamagnan G, Pfeifer A, Dinkelborg L, Muhs A, Stephens A. [P2–381]: PRECLINICAL CHARACTERIZATION OF PI‐2620, A NOVEL TAU PET TRACER FOR DETECTION OF TAU IN AD AND OTHER TAUOPATHIES. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.1036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wilde A, Flier WM, Bouwman FH, Ossenkoppele R, Pelkmans W, Groot C, Zwan MD, Yaqub MM, Teunissen CE, Stephens A, Lammertsma AA, Berckel BN, Scheltens P. [IC‐P‐005]: CONCORDANCE BETWEEN CEREBROSPINAL FLUID AMYLOID‐β AND [
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F]FLORBETABEN PET IN AN UNSELECTED COHORT OF MEMORY CLINIC PATIENTS. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.2277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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de Wilde A, van Maurik IS, Kunneman M, Bouwman F, Zwan M, Willemse EAJ, Biessels GJ, Minkman M, Pel R, Schoonenboom NSM, Smets EMA, Wattjes MP, Barkhof F, Stephens A, van Lier EJ, Batrla-Utermann R, Scheltens P, Teunissen CE, van Berckel BNM, van der Flier WM. Alzheimer's biomarkers in daily practice (ABIDE) project: Rationale and design. ALZHEIMER'S & DEMENTIA: DIAGNOSIS, ASSESSMENT & DISEASE MONITORING 2017; 6:143-151. [PMID: 28239639 PMCID: PMC5318541 DOI: 10.1016/j.dadm.2017.01.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Introduction The Alzheimer's biomarkers in daily practice (ABIDE) project is designed to translate knowledge on diagnostic tests (magnetic resonance imaging [MRI], cerebrospinal fluid [CSF], and amyloid positron emission tomography [PET]) to daily clinical practice with a focus on mild cognitive impairment (MCI) Methods ABIDE is a 3-year project with a multifaceted design and is structured into interconnected substudies using both quantitative and qualitative research methods. Results Based on retrospective data, we develop personalized risk estimates for MCI patients. Prospectively, we collect MRI and CSF data from 200 patients from local memory clinics and amyloid PET from 500 patients in a tertiary setting, to optimize application of these tests in daily practice. Furthermore, ABIDE will develop strategies for optimal patient-clinician conversations. Discussion Ultimately, this will result in a set of practical tools for clinicians to support the choice of diagnostic tests and facilitate the interpretation and communication of their results.
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Byrne J, Stephens A, Kaul K, Dinsmoor M. 29: Prevalence of cytomegalovirus infection in placentas and umbilical cords with inflammation from unexplained small for gestational age neonates: A pilot study. Am J Obstet Gynecol 2016. [DOI: 10.1016/j.ajog.2016.09.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Stephens A, Loidl WC, Beheshti M, Jambor I, Kemppainen J, Bostrom P, Kahkonen E, Berndt M, Mueller A, Minn H, Langsteger W. Detection of prostate cancer with the [68Ga]-labeled bombesin antagonist RM2 in patients undergoing radical prostatectomy. J Clin Oncol 2016. [DOI: 10.1200/jco.2016.34.2_suppl.80] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
80 Background: Gastrin-releasing-peptide receptor (GRPr) is overexpressed in prostate carcinoma (PCa) and offer new means to detect prostate cancer. The bombesin derivative RM2 (DOTA-4-amino-1-carboxymethylpiperidine-D-Phe-Gln-Trp-Ala-Val-Gly-His-Sta-Leu-NH2) is a GRPr antagonist with high binding affinity (Kd 3 nM). A first-in-man study was performed to assess tumor targeting potential of [68Ga]RM2 in patients with local PCa using PET/CT. Based on promising results a Phase I/II study in local PCa was initiated. Methods: In the initial study eleven men with biopsy-proven PCa scheduled for radical prostatectomy were enrolled. The patients (pt) received an i.v. dose of 140 MBq of [68Ga]RM2 followed by dynamic imaging for at least 60 min p.i. The PET assessment included visual evaluation of [68Ga]RM2 intra-prostatic and nodal uptake as well as quantification. An ongoing Phase I/II study is designed to enroll 30+50 biopsy-positive PCa patients. The initial 30 pt have been enrolled, stratified into high, intermediate and low risk of prostate Ca recurrence as defined by NCCN criteria. Results: High uptake of [68Ga]RM2 is seen in pancreas and the urinary system with low background in the rest of the body. Despite of high bladder activity focal or multifocal intraprostatic uptake was detectable. In the first study 10 of 11 pt had positive scans. Subsector analysis of PET positivity vs. pathology yielded a sensitivity, specificity and accuracy of 89, 81, and 83%, respectively. SUVmax was measured in 14 lesions from 9 pts, classified in two groups according to postoperative Gleason score (GS). The higher GS group showed a trend toward higher SUV-values, 10.0 ± 6.7 vs. 6.2 ± 2.5 (t-test: t = -1.21, p-value = 0.28). Both of which were elevated compared to normal tissue 1.2 ± 0.8 The ongoing study is designed with a power of 95% to discriminate between the two GS groups with statistical significance (p = 0.05). Conclusions: [68Ga]RM2 is a promising new tracer with a high detection rate for PCa. Preliminary data indicates higher uptake in more aggressive cancers. The current study is assessing the diagnostic accuracy and impact of presurgical risk assessment on tumor detection in newly diagnosed PCa patients. Clinical trial information: NCT02483884.
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