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Jansen YJL, Rozeman EA, Mason R, Goldinger SM, Geukes Foppen MH, Hoejberg L, Schmidt H, van Thienen JV, Haanen JBAG, Tiainen L, Svane IM, Mäkelä S, Seremet T, Arance A, Dummer R, Bastholt L, Nyakas M, Straume O, Menzies AM, Long GV, Atkinson V, Blank CU, Neyns B. Discontinuation of anti-PD-1 antibody therapy in the absence of disease progression or treatment limiting toxicity: clinical outcomes in advanced melanoma. Ann Oncol 2019; 30:1154-1161. [PMID: 30923820 DOI: 10.1093/annonc/mdz110] [Citation(s) in RCA: 150] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Programmed cell death protein 1 (PD-1) blocking monoclonal antibodies improve the overall survival of patients with advanced melanoma but the optimal duration of treatment has not been established. PATIENTS AND METHODS This academic real-world cohort study investigated the outcome of 185 advanced melanoma patients who electively discontinued anti-PD-1 therapy with pembrolizumab (N = 167) or nivolumab (N = 18) in the absence of disease progression (PD) or treatment limiting toxicity (TLT) at 14 medical centres across Europe and Australia. RESULTS Median time on treatment was 12 months (range 0.7-43). The best objective tumour response at the time of treatment discontinuation was complete response (CR) in 117 (63%) patients, partial response (PR) in 44 (24%) patients and stable disease (SD) in 16 (9%) patients; 8 (4%) patients had no evaluable disease (NE). After a median follow-up of 18 months (range 0.7-48) after treatment discontinuation, 78% of patients remained free of progression. Median time to progression was 12 months (range 2-23). PD was less frequent in patients with CR (14%) compared with patients with PR (32%) and SD (50%). Six out of 19 (32%) patients who were retreated with an anti-PD-1 at the time of PD obtained a new antitumour response. CONCLUSIONS In this real-world cohort of advanced melanoma patients discontinuing anti-PD-1 therapy in the absence of TLT or PD, the duration of anti-PD-1 therapy was shorter when compared with clinical trials. In patients obtaining a CR, and being treated for >6 months, the risk of relapse after treatment discontinuation was low. Patients achieving a PR or SD as best tumour response were at higher risk for progression after discontinuing therapy, and defining optimal treatment duration in such patients deserves further study. Retreatment with an anti-PD-1 at the time of progression may lead to renewed antitumour activity in some patients. CLINICAL TRIAL REGISTRATION NCT02673970 (https://clinicaltrials.gov/ct2/show/NCT02673970?cond=melanoma&cntry=BE&city=Jette&rank=3).
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Schmidt H, Braubach P, Schilpp C, Lochbaum R, Neuland K, Thompson K, Jonigk D, Frick M, Dietl P, Wittekindt OH. IL-13 Impairs Tight Junctions in Airway Epithelia. Int J Mol Sci 2019; 20:ijms20133222. [PMID: 31262043 PMCID: PMC6651493 DOI: 10.3390/ijms20133222] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 06/27/2019] [Indexed: 12/12/2022] Open
Abstract
Interleukin-13 (IL-13) drives symptoms in asthma with high levels of T-helper type 2 cells (Th2-cells). Since tight junctions (TJ) constitute the epithelial diffusion barrier, we investigated the effect of IL-13 on TJ in human tracheal epithelial cells. We observed that IL-13 increases paracellular permeability, changes claudin expression pattern and induces intracellular aggregation of the TJ proteins zonlua occludens protein 1, as well as claudins. Furthermore, IL-13 treatment increases expression of ubiquitin conjugating E2 enzyme UBE2Z. Co-localization and proximity ligation assays further showed that ubiquitin and the proteasomal marker PSMA5 co-localize with TJ proteins in IL-13 treated cells, showing that TJ proteins are ubiquitinated following IL-13 exposure. UBE2Z upregulation occurs within the first day after IL-13 exposure. Proteasomal aggregation of ubiquitinated TJ proteins starts three days after IL-13 exposure and transepithelial electrical resistance (TEER) decrease follows the time course of TJ-protein aggregation. Inhibition of JAK/STAT signaling abolishes IL-13 induced effects. Our data suggest that that IL-13 induces ubiquitination and proteasomal aggregation of TJ proteins via JAK/STAT dependent expression of UBE2Z, resulting in opening of TJs. This may contribute to barrier disturbances in pulmonary epithelia and lung damage of patients with inflammatory lung diseases.
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Klimenko MV, Bessarab FS, Sukhodolov TV, Klimenko VV, Koren’kov YN, Zakharenkova IE, Chirik NV, Vasil’ev PA, Kulyamin DV, Schmidt H, Funke B, Rozanov EV. Erratum to: Ionospheric Effects of the Sudden Stratospheric Warming in 2009: Results of Simulation with the First Version of the EAGLE Model. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2019. [DOI: 10.1134/s199079311909001x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chen R, Poulsen A, Schmidt H. Spectral, spatial, and temporal characteristics of underwater ambient noise in the Beaufort Sea in 1994 and 2016. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2019; 145:605. [PMID: 30823813 DOI: 10.1121/1.5088601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 01/11/2019] [Indexed: 06/09/2023]
Abstract
Climate induced changes in the Arctic Ocean have severely impacted underwater acoustic communication and navigation; understanding underwater noise characteristics is critical to improving the performance of these operations. Ambient noise from the Beaufort Sea recorded in experiments more than 20 years apart (SIMI94 and ICEX16) are compared to determine differences that may be attributed to the region's rapidly changing environment. Spectral comparison shows noise within 20-350 Hz is ∼30 dB louder in 1994 than 2016; however, this is likely due to higher array self noise during SIMI94. Beamforming results show ambient noise vertical directionality is focused near the horizontal during SIMI94 but more spread in elevation during ICEX16, with a robust noise notch at the horizontal. Numerical modeling demonstrates that this difference may be attributed to ambient noise during ICEX16 being dominated by surface noise sources at discrete ranges rather than the historical assumption of a continuous and uniform distribution of sources. Temporal statistics of transient ice events show more acoustic activity during SIMI94 than ICEX16 and appear to support the new proposed surface source distribution for ICEX16.
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Veres G, Bai Y, Stark A, Schmidt H, Radovits T, Loganathan S, Korkmaz-Icöz S, Karck M, Szabo G. Pharmacological Activation of Soluble Guanylate Cyclase Improves Vascular Graft Function. Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1678867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Donia M, Ellebaek E, Oellegaard T, Duval L, Aaby J, Hoejberg L, Koehler U, Schmidt H, Bastholt L, Svane IM. The real-world impact of cancer immunotherapy on the survival of patients with metastatic melanoma. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy486.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Winkelmann VE, Thompson KE, Neuland K, Jaramillo AM, Fois G, Schmidt H, Wittekindt OH, Han W, Tuvim MJ, Dickey BF, Dietl P, Frick M. Inflammation-induced upregulation of P2X 4 expression augments mucin secretion in airway epithelia. Am J Physiol Lung Cell Mol Physiol 2018; 316:L58-L70. [PMID: 30358443 DOI: 10.1152/ajplung.00157.2018] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Mucus clearance provides an essential innate defense mechanism to keep the airways and lungs free of particles and pathogens. Baseline and stimulated mucin secretion from secretory airway epithelial cells need to be tightly regulated to prevent mucus hypersecretion and mucus plugging of the airways. It is well established that extracellular ATP is a potent stimulus for regulated mucus secretion. Previous studies revealed that ATP acts via metabotropic P2Y2 purinoreceptors on goblet cells. Extracellular ATP, however, is also a potent agonist for ionotropic P2X purinoreceptors. Expression of several P2X isoforms has been reported in airways, but cell type-specific expression and the function thereof remained elusive. With this study, we now provide evidence that P2X4 is the predominant P2X isoform expressed in secretory airway epithelial cells. After IL-13 treatment of either human primary tracheal epithelial cells or mice, P2X4 expression is upregulated in vitro and in vivo under conditions of chronic inflammation, mucous metaplasia, and hyperplasia. Upregulation of P2X4 is strongest in MUC5AC-positive goblet cells. Moreover, activation of P2X4 by extracellular ATP augments intracellular Ca2+ signals and mucin secretion, whereas Ca2+ signals and mucin secretion are dampened by inhibition of P2X4 receptors. These data provide new insights into the purinergic regulation of mucin secretion and add to the emerging picture that P2X receptors modulate exocytosis of large secretory organelles and secretion of macromolecular vesicle cargo.
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Turner J, Pond G, Tremblay A, Johnston M, Goss G, Nicholas G, Martel S, Bhatia R, Liu G, Schmidt H, Tammemagi M, Puksa S, Atkar-Khattra S, Tsao M, Lam S, Goffin J. P2.11-23 Risk Perception Among a Lung Cancer Screening Population. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ascierto P, Ferrucci P, Stephens R, Del Vecchio M, Atkinson V, Schmidt H, Schachter J, Queirolo P, Long G, Di Giacomo A, Svane I, Lotem M, Bar-Sela G, Couture F, Mookerjee B, Ghori R, Ibrahim N, Homet Moreno B, Ribas A. KEYNOTE-022 Part 3: Phase II randomized study of 1L dabrafenib (D) and trametinib (T) plus pembrolizumab (Pembro) or placebo (PBO) for BRAF-mutant advanced melanoma. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy289] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Donia M, Ellebaek E, Øllegaard T, Duval L, Aaby J, Højberg L, Køhler U, Schmidt H, Bastholt L, Svane IM. The real-world impact of modern treatments on the survival of patients with metastatic melanoma. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy289.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ang M, Schmidt H, Mani R, Darling G, Langer D, Jain P, Treister V, Tammemagi M, Flora S. P3.11-21 The Development of a Robust Radiology Quality Assurance (QA) Program in a Provincial High-Risk Lung Cancer Screening Pilot (HRLCSP). J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Darling G, Schmidt H, Yu M, Luettschwager M, Pylypenko B, Patel T, Rivera V, Pearson K, Larson K, Tammemagi M. MA20.06 Lung Cancer Screening Pilot for People at High Risk: Early Results on Cancer Detection and Staging. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Jerliu B, Hüger E, Dörrer L, Seidlhofer BK, Steitz R, Horisberger M, Schmidt H. Lithium insertion into silicon electrodes studied by cyclic voltammetry and operando neutron reflectometry. Phys Chem Chem Phys 2018; 20:23480-23491. [PMID: 30183027 DOI: 10.1039/c8cp03540g] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Operando neutron reflectometry measurements were carried out to study the insertion of lithium into amorphous silicon film electrodes during cyclic voltammetry (CV) experiments at a scan rate of 0.01 mV s-1. The experiments allow mapping of regions where significant amounts of Li are incorporated/released from the electrode and correlation of the results to modifications of characteristic peaks in the CV curve. High volume changes up to 390% accompanied by corresponding modifications of the neutron scattering length density (which is a measure of the average Li fraction present in the electrode) are observed during electrochemical cycling for potentials below 0.3 V (lithiation) and above 0.2 V (delithiation), leading to a hysteretic behaviour. This is attributed to result from mechanical stress as suggested in the literature. Formation and modification of a surface layer associated with the solid electrolyte interphase (SEI) were observed during cycling. Within the first lithiation cycle the SEI grows to 120 Å for potentials below 0.5 V. Afterwards a reversible and stable modification of the SEI between 70 Å (delithiated state) and 120 Å (lithiated state) takes place.
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Veres G, Hagenhoff M, Schmidt H, Radovits T, Loganathan S, Bai Y, Korkmaz-Icöz S, Brlecic P, Sayour A, Karck M, Szabó G. Targeting Phosphodiesterase-5 by Vardenafil Improves Vascular Graft Function. J Vasc Surg 2018. [DOI: 10.1016/j.jvs.2018.07.010] [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]
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Dzinaj T, Funk M, Schmidt H, Böttger S, Güngör T, Klarmann D, Kreuz W. Radiological Score in Paediatric Haemophilic Patients with Early and Late Onset of Factor VIII - Prophylaxis. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1650635] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Mayer F, Arampatzis A, Banzer W, Beck H, Brüggemann GP, Hasenbring M, Kellmann M, Kleinert J, Schiltenwolf M, Schmidt H, Schneider C, Stengel D, Wippert PM, Platen P. Medicine in Spine Exercise [MiSpEx] – a national research network to evaluate back
pain. DEUTSCHE ZEITSCHRIFT FÜR SPORTMEDIZIN 2018. [DOI: 10.5960/dzsm.2018.340] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Schmack B, Kremer J, Brcic A, Grossekettler L, Goldwasser R, Arif R, Farag M, Schmidt H, Kreusser M, Raake P, Karck M, Ruhparwar A. Results of Concomitant Percutaneous Temporary RVAD Support Using the Cardiac Assist TandemHeart With ProtekDuo Cannula in LVAD Patients. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.969] [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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Umair M, Eckstein G, Rudolph G, Strom T, Graf E, Hendig D, Hoover J, Alanay J, Meitinger T, Schmidt H, Ahmad W. Homozygous XYLT2 variants as a cause of spondyloocular syndrome. Clin Genet 2018; 93:913-918. [PMID: 29136277 DOI: 10.1111/cge.13179] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 10/27/2017] [Accepted: 10/29/2017] [Indexed: 12/20/2022]
Abstract
Spondyloocular syndrome (SOS) is a rare autosomal recessive, skeletal disorder. Two recent studies have shown that it is the result of biallelic sequence variants in the XYLT2 gene with pleiotropic effects in multiple organs, including retina, heart muscle, inner ear, cartilage, and bone. The XYLT2 gene encodes xylosyltransferase 2, which catalyzes the transfer of xylose (monosaccharide) to the core protein of proteoglycans (PGs) leading to initiating the process of PG assembly. SOS was originally characterized in 2 families A and B of Iraqi and Turkish origin, respectively. Using DNA from affected members of the same 2 families, we performed whole exome sequencing, which revealed 2 novel homozygous missense variants (c.1159C > T, p.Arg387Trp) and (c.2548G > C, p.Asp850His). Our findings extend the body of evidence that SOS is caused by homozygous variants in the XYLT2 gene. In addition, this report has extended the phenotypic description of SOS by adding follow-up data from 5 affected individuals in one of the two families, presented here.
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Schadow C, Schmidt H, Schorcht A, Meyer F. [Rare Clinical Case of a Small Intestine Ileus Following an Invaginated Meckel's Diverticulum]. Dtsch Med Wochenschr 2018; 143:407-410. [PMID: 29544236 DOI: 10.1055/s-0044-101965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
MEDICAL HISTORY AND CLINICAL FINDINGS A 43-year old male patient was admitted because of diffuse abdominal discomfort for two days, which had started in the upper abdomen; medical history, no previous surgical interventions at the abdomen. INVESTIGATIONS Gastroscopy and abdominal ultrasound revealed only a mild gastritis. Laboratory parameters: showed only a slight leucocytosis (10 610/µL). On the 1st day of the hospital stay, the patient developed a worsening of the abdominal symptoms with distended abdomen, sounding bowel movements and recurrent vomiting, which were interpreted as acute abdomen by the surgeon on call leading to the indication of a surgical intervention. CT scan revealed an intraluminal tumor. DIAGNOSIS Suspicion of a mechanical ileus by an obstructing tumor of the small intestine. THERAPY Median laparotomy of the lower abdomen revealed an invagination at the terminal ileum - after devagination, an invaginated Meckel's diverticulum was found. This was resected at its basis and the ileal wall was transversally sutured. COURSE The postoperative course was uneventful. DISCUSSION (CONCLUSION) An invaginated Meckel's diverticulum belongs rather to the less frequent causes of an ileus of the small intestine and an unclear / acute abdomen in adults.
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Darinskii AN, Weihnacht M, Schmidt H. FE analysis of surface acoustic wave transmission in composite piezoelectric wedge structures. ULTRASONICS 2018; 84:366-372. [PMID: 29241057 DOI: 10.1016/j.ultras.2017.11.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 11/07/2017] [Accepted: 11/26/2017] [Indexed: 06/07/2023]
Abstract
The paper numerically investigates the transmission of harmonic surface acoustic waves (SAWs) across the perfectly bonded and perfectly sliding contacts between two 90°-wedges, at least one of which possessing piezoelectric properties. The finite element method in frequency domain is used. The structures are constructed of lithium niobate, fused quartz, silicon and gallium arsenide. The SAW is always incident from lithium niobate. The dependences of the transmission coefficient on the combination of materials and the orientation of the lithium niobate, as well as on the height of the step at the interface between the two parts of the structure are computed and analyzed. This step can appear in the process of fabrication of the composite substrate. The obtained results demonstrate that SAWs are able to transmit fairly efficiently across a wedge-like contact. Therefore such structures can be useful, in particular, in cases when it is advantageous to generate a SAW in one strongly piezoelectric material and observe its action, e.g., due to the transmitted surface normal displacement in another material like in SAW-driven microfluidics.
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Jensen C, Madsen D, Hansen M, Schmidt H, Svane I, Karsdal M, Willumsen N. Altered type III collagen turnover measured in pre-treatment serum predicts outcome in metastatic melanoma patients treated with Ipilimumab. Eur J Cancer 2018. [DOI: 10.1016/j.ejca.2018.01.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Werner C, Schmidt H, Bardeleben A, Hesse S. Automatisierte motorische Rehabilitation nach Schlaganfall. ACTA ACUST UNITED AC 2018. [DOI: 10.1055/s-0038-1626453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
ZusammenfassungDer Artikel bietet einen Überblick über die junge Forschungsrichtung der automatisierten motorischen Rehabilitation nach Schlaganfall. Der Einsatz intelligenter Maschinen zielt auf eine Steigerung der Therapieintensität, eine Entlastung der Therapeuten und die Gewährung einer nachvollziehbaren und auf die individuellen Bedürfnisse abgestimmten Therapie. Beispiele im Bereich der oberen Extremität sind der “MIT-Manus” und der “MIME”-Roboter für eine ungehinderte Schulter-Ellenbogenbewegung in der Horizontalen, der “Bi-Manu-Track” für das bilaterale, passive und aktive Üben einer Unterarmdrehund Handgelenkscharnierbewegung, und das “Nudelholz” für die Eigentherapie einer dreidimensionalen Bewegung in der Klinik oder zu Hause. In der Gangrehabilitation werden der “Lokomat®” als angetriebenes Exoskeleton in Verbindung mit dem Laufband sowie der elektromechanische Gangtrainer “GT I” als Modell mit angetriebenen Fußplatten verwandt. Klinische Studien zu den einzelnen Geräten werden mit aufgeführt.
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Schmidt H, De Angelis G, Bettendorf O, Eltze E, Semjonow A, Knichwitz G, Brandt B. Frequent Detection and Immunophenotyping of Prostate-Derived Cell Clusters in the Peripheral Blood of Prostate Cancer Patients. Int J Biol Markers 2018; 19:93-9. [PMID: 15255540 DOI: 10.1177/172460080401900202] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background Recent scientific studies have failed to determine parameters for the assessment of prostate cancer aggressiveness. The present study deals with the detection of blood-borne cancer cells based on polymerase chain reaction (PCR) and cell enrichment methods. The contradictory results reported in the literature have called into question the clinical usefulness of this diagnostic method in the preoperative staging of clinically localized prostate cancer. Methods We established a combined method of density gradient centrifugation and immunomagnetic separation using epithelium-specific antibodies, i.e. cytokeratins, to isolate prostate-derived circulating cells from the peripheral blood of patients with prostate cancer. Isolated cells were characterized by DNA staining and immunocytochemistry using antibodies for the detection of prostate-specific antigen (PSA), proliferation-associated proteins (MIB-1, H1 and H3) and apoptosis-associated proteins (M30, c-FasR). Results We applied these methods to 68 prostate cancer patients and were able to isolate cell clusters in 98%. Immunophenotypic and morphological characterization of PSA-positive prostate-derived cell clusters found in the peripheral blood of prostate cancer patients showed two main populations: 1) in 35% of the investigated prostate cancer patients we detected rounded cell aggregates of probable cancer cells expressing proliferation-associated proteins and lacking apoptosis-associated protein expression; 2) in all cases there was a high frequency of circulating dysmorphic cell clusters positive for apoptosis-associated protein expression. Conclusion Our results demonstrate the existence of at least two different types of blood-borne prostate-derived circulating cell clusters. Of these, only the less frequent, round, small cell clusters harbor features that are probably necessary for the cells to survive for metastatic spread.
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Jensen C, Madsen D, Hansen M, Schmidt H, Svane IM, Karsdal M, Willumsen N. Serological assessment of extracellular matrix (ECM) remodeling in relation to clinical response in metastatic melanoma patients treated with ipilimumab. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx711.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Brédart A, Anota A, Young T, Tomaszewski KA, Arraras JI, Moura De Albuquerque Melo H, Schmidt H, Friend E, Bergenmar M, Costantini A, Vassiliou V, Hureaux J, Marchal F, Tomaszewska IM, Chie WC, Ramage J, Beaudeau A, Conroy T, Bleiker E, Kulis D, Bonnetain F, Aaronson NK. Phase III study of the European Organisation for Research and Treatment of Cancer satisfaction with cancer care core questionnaire (EORTC PATSAT-C33) and specific complementary outpatient module (EORTC OUT-PATSAT7). Eur J Cancer Care (Engl) 2017; 27. [PMID: 29094784 DOI: 10.1111/ecc.12786] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/20/2017] [Indexed: 11/27/2022]
Abstract
Advances in cancer care delivery require revision and further development of questionnaires assessing patients' perceived quality of care. This study pre-tested the revised EORTC satisfaction with cancer care core questionnaire applicable in both the cancer inpatient and outpatient settings, and its new, outpatient-specific complementary module. The process of revision, development of the extended application, and pre-testing of these questionnaires was based on phases I to III of the "EORTC Quality of Life Group Module Development Guidelines." In phase III, patients in 11 countries in four European regions, South America and Asia completed provisional versions of the questionnaires. Fifty-seven relevant issues selected from literature reviews and input from experts were operationalized into provisional items, and subsequently translated into ten languages. Assessment of understanding, acceptability, redundancy and relevance by patients (n = 151) from oncology inpatient wards, and outpatient chemotherapy, radiotherapy and consultation settings, led to retention of, deletion of and merging of 40, 14 and 6 items respectively. Cronbach's alpha coefficients for hypothesized questionnaire scales were above 0.80. Our results provide preliminary support for the 33-item EORTC Satisfaction with cancer care core questionnaire and the 7-item complementary module specific for the outpatient care setting. A large scale phase IV cross-cultural psychometric study is now underway.
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