23 results on '"Span S"'
Search Results
2. Nuclear localization of survivin is a positive prognostic factor for survival in advanced non-small-cell lung cancer
- Author
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Vischioni, B., van der Valk, P., Span, S. W., Kruyt, F. A. E., Rodriguez, J. A., and Giaccone, G.
- Published
- 2004
3. Assessment of IAP (inhibitor of apoptosis) proteins as predictors of response to chemotherapy in advanced non-small-cell lung cancer patients
- Author
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Ferreira, C. G., van der Valk, P., Span, S. W., Jonker, J. M., Postmus, P. E., Kruyt, F. A. E., and Giaccone, G.
- Published
- 2001
4. Rythmical Development Attendant upon the Change from Ashkenazi to Sephardi Pronunciation in Modern Hebrew Poetry / מגמות ריתמיות עם חילופי ה"הברה" (מ"אשכנזית" ל"ספרדית") בשירה העברית החדשה
- Author
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שפאן, ש' and Span, S.
- Published
- 1961
5. Expression of X-linked inhibitor of apoptosis as a novel prognostic marker in radically resected non-small cell lung cancer patients
- Author
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Ferreira, C. G., Valk, P., Span, S. W., Ludwig, I., Smit, E. F., Kruyt, F. A. E., Pinedo, H. M., Tinteren, H., Giuseppe Giaccone, Damage and Repair in Cancer Development and Cancer Treatment (DARE), and Guided Treatment in Optimal Selected Cancer Patients (GUTS)
- Subjects
SURVIVIN ,P53 ,XIAP ,BAX ,DEATH ,BREAST-CANCER ,PROTEIN ,CASPASES ,IAP ,GENE - Abstract
Purpose: To assess the pattern of expression and the prognostic value of the inhibitor of apoptosis family member X-linked inhibitor of apoptosis (XIAP; MIHA/ILP-a) in radically resected non-small cell lung cancer patients. Experimental Design: The expression of XIAP and its relationship with overall survival was analyzed by immunohistochemistry on tumors from 144 patients with early-stage non-small cell lung cancer. In addition, the apoptotic and mitotic index, Ki-67, p53, and bcl-2 levels were also assessed. Results: XIAP expression was specific for tumor cells, and the pattern was cytoplasmic. The median expression of XIAP was 20%, and when this value was used as a cutoff point for statistical analyses, 63 of the samples were considered high XIAP-expressing and 81 low XIAP-expressing. Surprisingly, high XIAP-expressing patients had a longer overall survival than the group expressing lower levels (60 versus 24 months of median survival; log rank, P = 0.01). The positive impact of XIAP expression on survival was confirmed by multivariate analysis (P = 0.026). Although no correlation was observed between XIAP expression and the apoptotic index, a significant inverse correlation was observed between XIAP, Ki-67 (P = 0.006), and mitotic index (P = 0.04). Conclusions: The unexpected inverse correlation of XIAP with proliferation markers and the absence of correlation with apoptotic index, coupled with its role as an independent positive prognostic factor for survival in radically resected NSCLC patients imply a more complex role for XIAP in tumor biology than anticipated by in vitro data.
- Published
- 2001
6. Global histone modifications predict prognosis of resected non-small cell lung cancer patients
- Author
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Barlesi, F., primary, Giaccone, G., additional, Gallegos-Ruiz, M. I., additional, Loundou, A., additional, Span, S. W., additional, Lefesvre, P., additional, Kruyt, F. A., additional, and Rodriguez, J., additional
- Published
- 2007
- Full Text
- View/download PDF
7. Topoisomerase IIa and other drug resistance markers in advanced non-small cell lung cancer
- Author
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Dingemans, A. M., Ark-Otte, J. van, Span, S., Scagliotti, G. V., Valk, P. van der, Postmus, P. E., and Giaccone, G.
- Published
- 2001
- Full Text
- View/download PDF
8. Familial risk for alcoholism and hangover symptoms
- Author
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Span, S. A. and Earleywine, M.
- Published
- 1999
- Full Text
- View/download PDF
9. Drug-induced apoptosis in lung cancer cells is not mediated by the Fas/FasL (CD95/APO1) signaling pathway
- Author
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Ferreira, C. G., Tolis, C., Span, S. W., Peters, G. J., Lopik, T., Kummer, A. J., Pinedo, H. M., and Giuseppe Giaccone
10. Chemotherapy triggers apoptosis in a caspase-8-dependent and mitochondria-controlled manner in the non-small cell lung cancer cell line NCI-H460
- Author
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Ferreira, C. G., Span, S. W., Godefridus J Peters, Kruyt, F. A. E., Giaccone, G., and Faculteit Medische Wetenschappen/UMCG
- Subjects
ACTIVATION ,LEUKEMIA-CELLS ,NEUROBLASTOMA-CELLS ,CD95 ,BCL-2 ,CASPASES ,DEATH DOMAIN ,THYMOCYTE APOPTOSIS ,DRUG-INDUCED APOPTOSIS ,CYTOCHROME-C ,respiratory tract diseases - Abstract
Chemotherapy-induced apoptosis is generally thought to be dependent on a pathway headed by caspase-9. This model is primarily based on studies performed in leukemia cells; however, little is known about caspase cascades in relatively resistant solid tumor cells, including nonsmall cell lung cancer (NSCLC) cells. Using the NSCLC cell line NCI-H460 (H460), here, wt: studied the effect of stable expression of various caspase inhibitors on apoptosis induced by the anticancer drugs cisplatin, topotecan, and gemcitabine. Interestingly, overexpression of caspase-9S and X-linked inhibitor of apoptosis (XIAP), both able to inhibit caspase-9 activity, failed to block apoptosis, In contrast, stable expression of caspase-8 inhibitors, such as cytokine response modifier A (CrmA) and dominant-negative caspase-8, almost completely abrogated apoptosis and also enhanced clonogenic survival. Caspase-8 activation in H460 cells was not mediated by death receptors, inasmuch as overexpression of dominant-negative Fas-associated death domain (FADD-DN) did not prevent procaspase-8 cleavage and subsequent apoptosis. However, stable expression of Bcl-2 and Bcl-x(L) did suppress these apoptotic events, including the release of cytochrome c from mitochondria, which was observed in drug-treated H460 cells. In the NSCLC cell line H460, we, thus, provide evidence for the existence of a novel drug-inducible apoptotic pathway in which activation of caspase-8, and not of caspase-9, forms the apical and mitochondria-dependent step that subsequently activates the downstream caspases.
11. Drug-eluting stent implantation in patients with acute coronary syndrome - The activity of platelets after inhibition and cardiovascular events: Optical Coherence Tomography (APICE OCT) study
- Author
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David Antoniucci, Gary S. Mintz, Bernhard Reimers, Antonio Colombo, Guido Parodi, Alaide Chieffo, Salvatore Saccà, Carmen Spaccarotella, Ciro Indolfi, Angela Ferrari, Simonetta Span, Angela Migliorini, Gill Louise Buchanan, Renato Valenti, Francesco Versaci, Annalisa Mongiardo, Renato Maria Bianchi, Akiko Maehara, Chieffo, A., Buchanan, G. L., Parodi, G., Versaci, F., Bianchi, R. M., Valenti, R., Sacca, S., Mongiardo, A., Span, S., Migliorini, A., Spaccarotella, C., Reimers, B., Antoniucci, D., Indolfi, C., Ferrari, A., Maehara, A., Mintz, G. S., and Colombo, A.
- Subjects
Male ,medicine.medical_specialty ,Acute coronary syndrome ,Coronary Stenosi ,medicine.medical_treatment ,Settore MED/11 - Malattie dell'Apparato Cardiovascolare ,Sudden death ,Coronary Restenosis ,Immunosuppressive Agent ,Percutaneous Coronary Intervention ,Coronary Restenosi ,Internal medicine ,Neointima ,medicine ,Clinical endpoint ,Humans ,Single-Blind Method ,Sirolimu ,Everolimus ,cardiovascular diseases ,Tomography ,Coronary Vessel ,Aged ,Sirolimus ,Neointimal hyperplasia ,Optical coherence tomography ,business.industry ,Coronary Stenosis ,Percutaneous coronary intervention ,Stent ,Drug-Eluting Stents ,Middle Aged ,medicine.disease ,Coronary Vessels ,Everolimu ,Optical Coherence ,Drug-eluting stent ,Cardiology ,Female ,Radiology ,Cardiology and Cardiovascular Medicine ,business ,Immunosuppressive Agents ,Mace ,Tomography, Optical Coherence ,Acute Coronary Syndrome ,Human - Abstract
Aims: To our knowledge, no randomised study has compared rates of uncovered stent struts in everolimus (EES) vs. newgeneration zotarolimuseluting (ZES-R) stents in acute coronary syndrome (ACS). The aim of our study was to evaluate the completeness of neointimal coverage with optical coherence tomography (OCT) in ACS patients treated with drug-eluting stents (DES) comparing EES versus new-generation ZES-R. Methods and results: All eligible ACS patients admitted to four Italian centres with a clinical indication for culprit lesion intervention were randomised 1:1 to EES or ZES-R. The primary study endpoint was the percentage of uncovered stent struts evaluated by optical coherence tomography (OCT) at six months. Secondary endpoints were the percentage of malapposed stent struts, percent neointimal hyperplasia crosssectional area (CSA) and major adverse cardiac events (MACE) at six months. A total of 60 patients were randomised to EES (n=29) or ZES-R (n=31). No differences were observed in baseline characteristics between the two groups. Overall, 31.7% presented with STEMI, of which 68.4% were anterior. The other patients comprised 41.7% NSTEMI and 26.7% troponin-negative ACS. A mean of 1.3±0.6 lesions were treated per patient, with a mean of 1.3±0.5 stents per lesion. At 30 days there was one sudden death. Sixmonth OCT analysis was performed in 25 lesions in the EES group and in 24 lesions in the ZES-R group. There was no difference in the primary endpoint of uncovered stent struts between groups (EES 6.42% [3.27, 9.57] vs. ZES-R 7.07% [3.22, 10.92]; p=0.80). Furthermore, there were no differences between groups in the percentage of malapposed stent struts, either with (EES 1.19% [0.34, 2.04] vs. ZES-R 0.85% [0.40, 1.30]; p=0.49) or without coverage (EES 1.06% [0.12, 2.01] vs. ZES-R 0.24% [0.05, 0.44]; p=0.09). Percent neointima CSA was similar in both groups (EES 37.0% [18.6, 55.3] vs. ZES-R 26.6% [18.4, 34.8]; p=0.31). At sixmonth clinical followup, no additional patients died or suffered MI. There were four MACE in the EES group and one in the ZES-R group. Conclusions: In our study, in patients presenting with ACS, both EES and ZES-R had low percentages of malapposed and uncovered stent struts at sixmonth OCT analysis.
- Published
- 2014
12. Technology Use and Familiarity as an Indicator of Its Adoption in Museum by People with Intellectual Disabilities.
- Author
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Mastrogiuseppe M, Soares Guedes L, Landoni M, Span S, and Bortolotti E
- Subjects
- Humans, Museums, Recognition, Psychology, Research Personnel, Technology, Intellectual Disability
- Abstract
This paper describes the process of co-design of technological products to increase museum accessibility and engagement in visitors with mild or moderate intellectual disabilities (IDs). By using an Inclusive Research approach, a multidisciplinary team of experts, including researchers in Users Experience (UX), psychology, and education, museum curators and a group of participants with IDs (n=9) have participated as the research team. Participants with IDs were involved in two rounds of interviews. The first-round interview aimed to explore participants' use and familiarity with technologies and to understand their interest in using technological tools in different contexts. The second-round interview aimed at exploring participants' spontaneous choice between different tools classified as low (easy-to-read vs Augmentative and Alternative Communication) or high-tech (Augmented Reality) aids for acquiring new knowledge within a museum space. The analysis of the interviews revealed that there was a general consistency between previous technology use/experience/interest and the choice of ICT-based products by participants with IDs. These results highlight the importance of emphasizing a multidisciplinary dialogue and the active participation of IDs users to outline methodologies, programs, procedures, and international standards to foster inclusive access to cultural heritage.
- Published
- 2022
- Full Text
- View/download PDF
13. Drug-eluting stent implantation in patients with acute coronary syndrome - the Activity of Platelets after Inhibition and Cardiovascular Events: Optical Coherence Tomography (APICE OCT) study.
- Author
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Chieffo A, Buchanan GL, Parodi G, Versaci F, Bianchi RM, Valenti R, Saccà S, Mongiardo A, Span S, Migliorini A, Spaccarotella C, Reimers B, Antoniucci D, Indolfi C, Ferrari A, Maehara A, Mintz GS, and Colombo A
- Subjects
- Acute Coronary Syndrome etiology, Aged, Coronary Stenosis complications, Coronary Stenosis pathology, Everolimus, Female, Humans, Male, Middle Aged, Percutaneous Coronary Intervention, Single-Blind Method, Sirolimus therapeutic use, Tomography, Optical Coherence, Acute Coronary Syndrome surgery, Coronary Restenosis prevention & control, Coronary Stenosis surgery, Coronary Vessels pathology, Drug-Eluting Stents, Immunosuppressive Agents therapeutic use, Neointima pathology, Sirolimus analogs & derivatives
- Abstract
Aims: To our knowledge, no randomised study has compared rates of uncovered stent struts in everolimus (EES) vs. new-generation zotarolimus-eluting (ZES-R) stents in acute coronary syndrome (ACS). The aim of our study was to evaluate the completeness of neointimal coverage with optical coherence tomography (OCT) in ACS patients treated with drug-eluting stents (DES) comparing EES versus new-generation ZES-R., Methods and Results: All eligible ACS patients admitted to four Italian centres with a clinical indication for culprit lesion intervention were randomised 1:1 to EES or ZES-R. The primary study endpoint was the percentage of uncovered stent struts evaluated by optical coherence tomography (OCT) at six months. Secondary endpoints were the percentage of malapposed stent struts, percent neointimal hyperplasia cross-sectional area (CSA) and major adverse cardiac events (MACE) at six months. A total of 60 patients were randomised to EES (n=29) or ZES-R (n=31). No differences were observed in baseline characteristics between the two groups. Overall, 31.7% presented with STEMI, of which 68.4% were anterior. The other patients comprised 41.7% NSTEMI and 26.7% troponin-negative ACS. A mean of 1.3±0.6 lesions were treated per patient, with a mean of 1.3±0.5 stents per lesion. At 30 days there was one sudden death. Six-month OCT analysis was performed in 25 lesions in the EES group and in 24 lesions in the ZES-R group. There was no difference in the primary endpoint of uncovered stent struts between groups (EES 6.42% [3.27, 9.57] vs. ZES-R 7.07% [3.22, 10.92]; p=0.80). Furthermore, there were no differences between groups in the percentage of malapposed stent struts, either with (EES 1.19% [0.34, 2.04] vs. ZES-R 0.85% [0.40, 1.30]; p=0.49) or without coverage (EES 1.06% [0.12, 2.01] vs. ZES-R 0.24% [0.05, 0.44]; p=0.09). Percent neointima CSA was similar in both groups (EES 37.0% [18.6, 55.3] vs. ZES-R 26.6% [18.4, 34.8]; p=0.31). At six-month clinical follow-up, no additional patients died or suffered MI. There were four MACE in the EES group and one in the ZES-R group., Conclusions: In our study, in patients presenting with ACS, both EES and ZES-R had low percentages of malapposed and uncovered stent struts at six-month OCT analysis.
- Published
- 2014
- Full Text
- View/download PDF
14. Synergy of molecular and serological methods in minimally invasive diagnosis of enteroviral cardiac infection.
- Author
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Costanzo CM, Monte I, Zappal D, Palermo CI, Span S, Russo R, Oliveri S, Patamia I, and Scalia G
- Subjects
- Adult, Cell Line, Child, Enterovirus Infections virology, Female, Fluorescent Antibody Technique, Heart Diseases virology, Humans, Male, Middle Aged, Enterovirus Infections diagnosis, Myocarditis virology, Pericarditis virology
- Abstract
Treatment of myocarditis and pericarditis can differ on the basis of aetiology: systemic or auto-immune disease can be positively influenced by corticoid therapy, whereas this kind of treatment can worsen the course of virus-induced disease. Therefore, the aetiological diagnosis is extremely important. The synergistic use of minimally invasive serological, IgG, IgM, IgA, and neutralizing titres, and RNA detection was evaluated on representative patients out of 238 suffering from cardiopathies. The results obtained for each case can yield reliable guidelines that rapidly highlight the presence of a viral aetiology so that an endomyocardial biopsy can be performed thus eliminating incorrect therapies. Thus, not only is this technique rapid, minimally invasive providing the clinician with decisive data, but it is cost effective for the health system.
- Published
- 2011
15. Workflow comparison for label-free, quantitative secretome proteomics for cancer biomarker discovery: method evaluation, differential analysis, and verification in serum.
- Author
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Piersma SR, Fiedler U, Span S, Lingnau A, Pham TV, Hoffmann S, Kubbutat MH, and Jiménez CR
- Subjects
- Animals, Cell Line, Mice, Neoplasm Transplantation, Osteopontin metabolism, Receptor, IGF Type 1 metabolism, Reproducibility of Results, Tandem Mass Spectrometry, Vascular Endothelial Growth Factor A metabolism, Biomarkers, Tumor blood, Chromatography, Gel methods, Chromatography, Reverse-Phase methods, Electrophoresis, Polyacrylamide Gel methods, Proteome metabolism, Proteomics methods
- Abstract
The cancer cell secretome has emerged as an attractive subproteome for discovery of candidate blood-based biomarkers. To choose the best performing workflow, we assessed the performance of three first-dimension separation strategies prior to nanoLC-MS/MS analysis: (1) 1D gel electrophoresis (1DGE), (2) peptide SCX chromatography, and (3) tC2 protein reversed phase chromatography. 1DGE using 4-12% gradient gels outperformed the SCX and tC2 methods with respect to number of identified proteins (1092 vs 979 and 580, respectively), reproducibility of protein identification (80% vs 70% and 72%, respectively, assessed in biological N = 3). Reproducibility of protein quantitation based on spectral counting was similar for all 3 methods (CV: 26% vs 24% and 24%, respectively). As a proof-of-concept of secretome proteomics for blood-based biomarker discovery, the gradient 1DGE workflow was subsequently applied to identify IGF1R-signaling related proteins in the secretome of mouse embryonic fibroblasts transformed with human IGF1R (MEF/Toff/IGF1R). VEGF and osteopontin were differentially detected by LC-MS/MS and verified in secretomes by ELISA. Follow-up in serum of mice bearing MEF/Toff/IGF1R-induced tumors showed an increase of osteopontin levels paralleling tumor growth, and reduction in the serum of mice in which IGF1R expression was shut off and tumor regressed.
- Published
- 2010
- Full Text
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16. Complications of carotid stenting during live transmissions.
- Author
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Franke J, Reimers B, Scarpa M, Span S, Thieme M, Wunderlich N, Scheinert D, and Sievert H
- Subjects
- Adult, Aged, Aged, 80 and over, Blindness etiology, Carotid Stenosis mortality, Europe, Female, Humans, Ischemic Attack, Transient etiology, Male, Middle Aged, Myocardial Infarction etiology, Risk Assessment, Risk Factors, Stroke etiology, Time Factors, Treatment Outcome, Angioplasty adverse effects, Angioplasty education, Angioplasty instrumentation, Angioplasty mortality, Carotid Stenosis surgery, Education, Medical methods, Stents, Videoconferencing
- Abstract
Objectives: We sought to examine the acute and subacute results of carotid stenting performed during live transmissions., Background: Teaching courses focusing on live demonstrations of carotid interventions have been the key educational facility for physicians interested in learning state-of-the-art interventional techniques of carotid stenosis treatment. However, starting with the very first live demonstration of interventional procedures, there has been an ongoing discussion whether patients treated during live transmissions are at higher risk., Methods: Between March 1, 2001, and June 30, 2008, 186 high-grade lesions of the internal carotid artery in 186 patients have been treated by stent implantation during live transmissions to 22 interventional conferences at 3 high-volume centers. Technical success was defined as the ability to perform carotid stent implantation. The combined end point of death, major stroke, minor stroke, or myocardial infarction was defined as primary end point., Results: The procedure was technically successful in 185 of 186 (99.5%) interventions. Seventeen patients had 1 of the following acute in-hospital complications: major stroke in 2 (1.1%), minor stroke in 3 (1.6%), transient ischemic attack in 11 (5.9%), and amaurosis of the ipsilateral eye due to an occlusion of the retinal artery in 1 (0.5%). None of the patients died, and no myocardial infarctions occurred. The composite primary end point occurred in 6 (3.2%) patients., Conclusions: In this consecutive series of carotid stent cases performed by expert operators during live demonstration courses, the procedural and 30-day clinical outcomes were similar to the results appearing in the contemporary published data.
- Published
- 2009
- Full Text
- View/download PDF
17. Expression of X-linked inhibitor of apoptosis as a novel prognostic marker in radically resected non-small cell lung cancer patients.
- Author
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Ferreira CG, van der Valk P, Span SW, Ludwig I, Smit EF, Kruyt FA, Pinedo HM, van Tinteren H, and Giaccone G
- Subjects
- Aged, Carcinoma, Non-Small-Cell Lung metabolism, Carcinoma, Non-Small-Cell Lung surgery, Cell Division, Female, Humans, Immunohistochemistry, Lung Neoplasms metabolism, Lung Neoplasms surgery, Male, Middle Aged, Multivariate Analysis, Prognosis, Proto-Oncogene Proteins c-bcl-2 biosynthesis, Survival Analysis, Tumor Suppressor Protein p53 biosynthesis, X-Linked Inhibitor of Apoptosis Protein, Apoptosis, Carcinoma, Non-Small-Cell Lung pathology, Lung Neoplasms pathology, Protein Biosynthesis, Proteins
- Abstract
Purpose: To assess the pattern of expression and the prognostic value of the inhibitor of apoptosis family member X-linked inhibitor of apoptosis (XIAP; MIHA/ILP-a) in radically resected non-small cell lung cancer patients., Experimental Design: The expression of XIAP and its relationship with overall survival was analyzed by immunohistochemistry on tumors from 144 patients with early-stage non-small cell lung cancer. In addition, the apoptotic and mitotic index, Ki-67, p53, and bcl-2 levels were also assessed., Results: XIAP expression was specific for tumor cells, and the pattern was cytoplasmic. The median expression of XIAP was 20%, and when this value was used as a cutoff point for statistical analyses, 63 of the samples were considered high XIAP-expressing and 81 low XIAP-expressing. Surprisingly, high XIAP-expressing patients had a longer overall survival than the group expressing lower levels (60 versus 24 months of median survival; log rank, P = 0.01). The positive impact of XIAP expression on survival was confirmed by multivariate analysis (P = 0.026). Although no correlation was observed between XIAP expression and the apoptotic index, a significant inverse correlation was observed between XIAP, Ki-67 (P = 0.006), and mitotic index (P = 0.04)., Conclusions: The unexpected inverse correlation of XIAP with proliferation markers and the absence of correlation with apoptotic index, coupled with its role as an independent positive prognostic factor for survival in radically resected NSCLC patients imply a more complex role for XIAP in tumor biology than anticipated by in vitro data.
- Published
- 2001
18. Chemotherapy triggers apoptosis in a caspase-8-dependent and mitochondria-controlled manner in the non-small cell lung cancer cell line NCI-H460.
- Author
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Ferreira CG, Span SW, Peters GJ, Kruyt FA, and Giaccone G
- Subjects
- Amino Acid Chloromethyl Ketones pharmacology, Antimetabolites, Antineoplastic pharmacology, Antineoplastic Agents pharmacology, Blotting, Western, Carrier Proteins metabolism, Caspase 8, Caspase 9, Caspase Inhibitors, Cisplatin pharmacology, Cytochrome c Group metabolism, Cytosol metabolism, DNA, Complementary metabolism, Deoxycytidine analogs & derivatives, Deoxycytidine pharmacology, Fas-Associated Death Domain Protein, Genes, Dominant, Humans, Inhibitory Concentration 50, Jurkat Cells, Mitochondria metabolism, Proto-Oncogene Proteins c-bcl-2 metabolism, Spectrometry, Fluorescence, Topotecan pharmacology, Transfection, Tumor Cells, Cultured, bcl-X Protein, Gemcitabine, Adaptor Proteins, Signal Transducing, Apoptosis drug effects, Carcinoma, Non-Small-Cell Lung drug therapy, Carcinoma, Non-Small-Cell Lung enzymology, Caspases metabolism, Lung Neoplasms drug therapy, Lung Neoplasms enzymology, Mitochondria drug effects
- Abstract
Chemotherapy-induced apoptosis is generally thought to be dependent on a pathway headed by caspase-9. This model is primarily based on studies performed in leukemia cells; however, little is known about caspase cascades in relatively resistant solid tumor cells, including non-small cell lung cancer (NSCLC) cells. Using the NSCLC cell line NCI-H460 (H460), here, we studied the effect of stable expression of various caspase inhibitors on apoptosis induced by the anticancer drugs cisplatin, topotecan, and gemcitabine. Interestingly, overexpression of caspase-9S and X-linked inhibitor of apoptosis (XIAP), both able to inhibit caspase-9 activity, failed to block apoptosis. In contrast, stable expression of caspase-8 inhibitors, such as cytokine response modifier A (CrmA) and dominant-negative caspase-8, almost completely abrogated apoptosis and also enhanced clonogenic survival. Caspase-8 activation in H460 cells was not mediated by death receptors, inasmuch as overexpression of dominant-negative Fas-associated death domain (FADD-DN) did not prevent procaspase-8 cleavage and subsequent apoptosis. However, stable expression of Bcl-2 and Bcl-xL did suppress these apoptotic events, including the release of cytochrome c from mitochondria, which was observed in drug-treated H460 cells. In the NSCLC cell line H460, we, thus, provide evidence for the existence of a novel drug-inducible apoptotic pathway in which activation of caspase-8, and not of caspase-9, forms the apical and mitochondria-dependent step that subsequently activates the downstream caspases.
- Published
- 2000
19. Psychiatrists' attitudes toward dissociative disorders diagnoses.
- Author
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Frankel AS and Span SA
- Subjects
- Bias, Data Interpretation, Statistical, Dissociative Disorders psychology, Forensic Psychiatry, Humans, Research Design standards, Terminology as Topic, United States, Attitude of Health Personnel, Dissociative Disorders diagnosis, Psychiatry
- Published
- 2000
- Full Text
- View/download PDF
20. Drug-induced apoptosis in lung cnacer cells is not mediated by the Fas/FasL (CD95/APO1) signaling pathway.
- Author
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Ferreira CG, Tolis C, Span SW, Peters GJ, van Lopik T, Kummer AJ, Pinedo HM, and Giaccone G
- Subjects
- Apoptosis drug effects, Carcinoma, Non-Small-Cell Lung, Carcinoma, Small Cell, Caspase 8, Caspase 9, Caspases metabolism, Cisplatin toxicity, Deoxycytidine analogs & derivatives, Deoxycytidine toxicity, Fas Ligand Protein, Flow Cytometry, Genes, p53, Humans, Lung Neoplasms, Membrane Glycoproteins genetics, Paclitaxel toxicity, Recombinant Proteins metabolism, Topotecan toxicity, Transfection, Tumor Cells, Cultured, fas Receptor genetics, Gemcitabine, Antineoplastic Agents toxicity, Apoptosis physiology, Membrane Glycoproteins physiology, Signal Transduction physiology, fas Receptor physiology
- Abstract
Anticancer drugs exert at least part of their cytotoxic effect by triggering apoptosis. We previously identified chemotherapy-induced apoptosis in lung cancer cells and suggested a role for p53 alternative or complementary pathways in this process. Recently, a role for the Fas/FasL (CD95/Apo1) signaling system in chemotherapy-induced apoptosis was proposed in some cell types. In the present work, the involvement of the Fas/FasL system in drug-induced apoptosis in lung cancer cells was investigated upon exposure to four cytotoxic drugs (cisplatin, gemcitabine, topotecan, and paclitaxel). We assessed the expression of Fas and FasL and the function of the Fas pathway in six lung cancer cell lines (H460, H322, GLC4, GLC4/ADR, H187, and N417). All lung cancer cell lines expressed Fas and FasL at RNA and protein levels, and apoptosis could be induced in four of six cell lines upon exposure to the Fas agonistic monoclonal antibody (mAb) CLB-CD95/15. Nevertheless, after drug exposure, no significant FasL up-regulation was observed, whereas the Fas expression was increased in the wild-type p53 cell line H460, but not in the other lines, proved to be mutant p53 by direct gene sequencing. Moreover, no correlation was observed in lung cancer cell lines between sensitivity to drugs and to a Fas agonistic mAb, and preincubation of cells with either the Fas-antagonistic mAb CLB-CD95/2 or a FasL-neutralizing mAb did not protect from drug-induced apoptosis. Taken together, these observations strongly argue against a role of the Fas/FasL signaling pathway in drug-induced apoptosis in lung cancer cells. Interestingly, caspase-8 activation was observed upon drug exposure, independently from Fas/FasL signaling.
- Published
- 2000
21. The effects of differences in burst duration and rise/decay time on auditory apparent motion in the free field.
- Author
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Span SA and Strybel TZ
- Subjects
- Acoustic Stimulation, Adult, Female, Humans, Male, Psychoacoustics, Time Factors, Illusions, Motion Perception, Sound Localization
- Published
- 1999
- Full Text
- View/download PDF
22. Cognitive functioning moderates the relation between hyperactivity and drinking habits.
- Author
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Span SA and Earleywine M
- Subjects
- Adolescent, Adult, Female, Humans, Male, Middle Aged, Models, Psychological, Neuropsychological Tests, Visual Perception physiology, Alcohol Drinking psychology, Cognition physiology, Hyperkinesis psychology
- Abstract
Previous research reveals an inconsistent link between hyperactivity and drinking (Weiss and Hechtman, 1993). This study sought to investigate whether cognitive functioning moderates the relation between these two variables. One hundred participants completed three measures of drinking habits, two measures of hyperactivity, and four measures of cognitive functioning. Confirmatory factor analysis showed that a three-factor model of hyperactivity, cognitive functioning, and drinking habits provided an excellent fit to the data. Stacked two-group analyses revealed that cognitive functioning moderated the association between hyperactivity and drinking habits. Drinking habits and hyperactivity correlated 0.408 (p < 0.05) for individuals low on cognitive performance; the correlation between these constructs was only 0.120 (NS) for individuals high on cognitive performance. Higher levels of cognitive functioning may buffer individuals from drinking alcohol in accordance with their hyperactive symptoms.
- Published
- 1999
23. The effect of timing and spatial separation on the velocity of auditory apparent motion.
- Author
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Strybel TZ, Span SA, and Witty AM
- Subjects
- Adult, Female, Humans, Male, Psychoacoustics, Acceleration, Illusions, Orientation, Sound Localization
- Abstract
Previously, it was shown that the minimum conditions for the illusion of auditory apparent motion (AAM) depend on stimulus timing but not spatial separation. In the present experiment, the effects of stimulus timing and source separation on the perceived velocity of AAM were examined. Eight listeners estimated the velocity, duration, and distance traveled of AAM, using a no-modulus, magnitude estimation procedure. Four burst durations (25, 50, 100, and 300 msec), 10 stimulus onset asynchronies (SOAs; 30, 40, 50, 60, 70, 80, 90, 100, 110, and 120 msec) and two separations (10 degrees and 40 degrees) were tested. Perceived velocity estimates were related to the total duration (burst duration + SOA) of the stimulus sequence. The effect of separation on velocity was extremely small but statistically significant. These results are similar to those obtained previously on the minimum conditions for AAM. Duration estimates were related only to total duration, but separation estimates were related to both separation and total duration. These results suggest that velocity is possibly a primary dimension of AAM that is independent of source separation.
- Published
- 1998
- Full Text
- View/download PDF
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