20 results on '"Poursoltan P"'
Search Results
2. Near real-time analysis of active distribution networks in a Digital Twin framework: A real case study
- Author
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Bragatto, T., Bucarelli, M.A., Carere, F., Cresta, M., Gatta, F.M., Geri, A., Maccioni, M., Paulucci, M., Poursoltan, P., and Santori, F.
- Published
- 2023
- Full Text
- View/download PDF
3. A Low-Cost Smart Monitoring Device for Demand-Side Response Campaigns
- Author
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Geri, A., primary, Gatta, F. M., additional, Maccioni, M., additional, Dell’Olmo, J., additional, Carere, F., additional, Bucarelli, M. A., additional, Poursoltan, P., additional, Hadifar, N., additional, and Paulucci, M., additional
- Published
- 2022
- Full Text
- View/download PDF
4. A Feature-Based Prediction Model of Algorithm Selection for Constrained Continuous Optimisation
- Author
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Poursoltan, Shayan and Neumann, Frank
- Subjects
Computer Science - Neural and Evolutionary Computing - Abstract
With this paper, we contribute to the growing research area of feature-based analysis of bio-inspired computing. In this research area, problem instances are classified according to different features of the underlying problem in terms of their difficulty of being solved by a particular algorithm. We investigate the impact of different sets of evolved instances for building prediction models in the area of algorithm selection. Building on the work of Poursoltan and Neumann [11,10], we consider how evolved instances can be used to predict the best performing algorithm for constrained continuous optimisation from a set of bio-inspired computing methods, namely high performing variants of differential evolution, particle swarm optimization, and evolution strategies. Our experimental results show that instances evolved with a multi-objective approach in combination with random instances of the underlying problem allow to build a model that accurately predicts the best performing algorithm for a wide range of problem instances.
- Published
- 2016
5. Safety and tolerability of Miltuximab® - a first in human study in patients with advanced solid cancers
- Author
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Dhanusha Sabanathan, Douglas Campbell, Vicki Velonas, Sandra Wissmueller, Hubert Mazure, Marko Trifunovic, Pirooz Poursoltan, Kevin Ho-Shon, Tiffany Mackay, Maria Lund, Yanling Lu, Paul Roach, Dale Bailey, Bradley Walsh, David Gillatt, and Howard Gurney
- Subjects
miltuximab® ,monoclonal antibody ,theranostic ,solid tumours ,glypican-1 ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Biology (General) ,QH301-705.5 - Abstract
Objective(s): Miltuximab® is a chimeric antibody targeting Glypican-1 (GPC-1), a cell surface antigen which is overexpressed in solid cancers. Miltuximab® has shown promising safety and efficacy in radioimmunotherapy models of prostate cancer. This first in human study used Miltuximab® radiolabelled with Gallium-67 ([67Ga]Ga-DOTA-Miltuximab®). The primary study endpoint was to establish safety and tolerability of Miltuximab®. Secondary endpoints were biodistribution, tumour targeting and pharmacokinetic analysis.Methods: Four cohorts of three patients (9 with advanced prostate cancer, 2 with pancreatic and 1 with bladder cancer) were dosed with 1 mg, ~250 MBq of [67Ga]Ga-DOTA-Miltuximab®. Cohort 1 received [67Ga]Ga-DOTA-Miltuximab® alone, while cohorts 2-4 were pre-infused with increasing doses (3.5, 11.5 and 24 mg, respectively) of unlabelled Miltuximab®-DOTA 1 hour prior to [67Ga]Ga-DOTA-Miltuximab®. Safety and tolerability were assessed by clinical and standard laboratory assessments. Patients underwent whole body gamma-camera scans and SPECT/CT scans up to 144 h post-infusion. Total organ radiation exposure was determined by dosimetry of whole-body gamma scans.Results: The dosing regimen was well tolerated, with no drug-related adverse events observed. Liver and spleen uptake of [67Ga]Ga-DOTA-Miltuximab® was observed. Liver uptake was reduced by pre-infusion of unlabelled Miltuximab®-DOTA. Dosimetry analysis showed a favorable exposure profile. [67Ga]Ga-DOTA-Miltuximab® targeting to tumour sites was observed in two prostate cancer patients who had failed enzalutamide treatment. Higher doses of unlabelled antibody achieved lower liver uptake and increased antibody serum half life.Conclusions: This study is the first in human for Miltuximab® a first in class antibody targeting GPC-1. The trial met its primary endpoint of safety, demonstrating its potential as a safe and tolerable monoclonal antibody. This safety data, together with targeting to tumour lesions and biodistribution information supports the further clinical development of Miltuximab® as a theranostic agent in a planned Phase I human trial.Trial registration: ANZCTR, ACTRN12616000787482, https://www.anzctr.org.
- Published
- 2021
- Full Text
- View/download PDF
6. A Feature-Based Comparison of Evolutionary Computing Techniques for Constrained Continuous Optimisation
- Author
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Poursoltan, Shayan and Neumann, Frank
- Subjects
Computer Science - Artificial Intelligence ,Computer Science - Neural and Evolutionary Computing - Abstract
Evolutionary algorithms have been frequently applied to constrained continuous optimisation problems. We carry out feature based comparisons of different types of evolutionary algorithms such as evolution strategies, differential evolution and particle swarm optimisation for constrained continuous optimisation. In our study, we examine how sets of constraints influence the difficulty of obtaining close to optimal solutions. Using a multi-objective approach, we evolve constrained continuous problems having a set of linear and/or quadratic constraints where the different evolutionary approaches show a significant difference in performance. Afterwards, we discuss the features of the constraints that exhibit a difference in performance of the different evolutionary approaches under consideration., Comment: 16 Pagesm 2 Figures
- Published
- 2015
7. A Feature-Based Analysis on the Impact of Set of Constraints for e-Constrained Differential Evolution
- Author
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Poursoltan, Shayan and Neumann, FranK
- Subjects
Computer Science - Neural and Evolutionary Computing - Abstract
Different types of evolutionary algorithms have been developed for constrained continuous optimization. We carry out a feature-based analysis of evolved constrained continuous optimization instances to understand the characteristics of constraints that make problems hard for evolutionary algorithm. In our study, we examine how various sets of constraints can influence the behaviour of e-Constrained Differential Evolution. Investigating the evolved instances, we obtain knowledge of what type of constraints and their features make a problem difficult for the examined algorithm., Comment: 17 Pages
- Published
- 2015
8. Dam construction material selection by implementing the integrated SWARA—CODAS approach with target-based attributes
- Author
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Ijadi Maghsoodi, Abteen, Ijadi Maghsoodi, Arta, Poursoltan, Parastou, Antucheviciene, Jurgita, and Turskis, Zenonas
- Published
- 2019
- Full Text
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9. The Factors Affecting the Formation of Political Behavior in Iranian Sport Ministry and Federations
- Author
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Robab Mokhtari, Ali Mohammad Safania, and Hossein Poursoltan Zarandi
- Subjects
internal organizational factors ,political behavior ,political skills ,political will ,sport federations ,Sports ,GV557-1198.995 ,Science (General) ,Q1-390 - Abstract
Background. When asked about employees' political behavior in the workplace, they often see it as signs of good behavior and see it as an ugly act that achieves personal goals at the expense of others, and May be harmful to the goals of the organization or individuals. Objectives. This study aimed to test a model of factors affecting political behavior in the sports industry. In the study, other objectives such as the moderating role of political skills and will, as well as the mediating role of the perception of organizational politics are discussed. Methods. The sample size of the present research is 705 people which are employees of the Ministry of Sport and federations (of football, volleyball, handball, basketball, weight-lifting, wrestling, taekwondo, veterans and disabled). These were selected by simple random sampling and a questionnaire was used to evaluate the variables under study. Results. The results did not show significant direct relationship between inter-organizational factors and show that perception of organizational politics mediated the relationship between inter-organizational factors and political behavior. The results showed that political skills and will, played the role of the moderator of organizational factors with political behavior. Conclusion. Politics is a fact of life in the organizations. Those who are not able to observe their political behavior cannot understand the fact that organization is a political system. Thus, the organizations should lead to the politicization and managers should make necessary attempts towards reaching organizational goals which is important.
- Published
- 2018
10. Ramping Up Customer-Centric Modular Design Projects: Mobile App Development for Pandemic Relief
- Author
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Khaled Medini, Stefan Wiesner, Milad Poursoltan, and David Romero
- Subjects
quality function deployment ,design projects ,ITIL v4 foundation ,customer-centric ,mobile apps’ development ,pandemic ,Systems engineering ,TA168 ,Technology (General) ,T1-995 - Abstract
Today’s fast-growing demands at the global level for mobile applications (apps) cause customers to call for the customization of their apps to fit their individualized needs and business realms. Customization is a challenge for apps-development companies when they want to satisfy their numerous users in a crowded competitive market. Moreover, pursuing customization involves additional challenges when ramping up app development projects in order to meet demands at a larger scale. To address this challenge, we proposed a framework to systematize and support mobile apps’ development consistently with a customer-driven approach and modular design philosophy. From a practical point of view, the proposed framework integrates quality function deployment (QFD), axiomatic design (AD) principles, and practices from the ITIL (Information Technology Infrastructure Library) framework. The framework supports a systematic process for translating customer needs into design parameters as well as supporting prioritization of ITIL practices for further development. The effectiveness of the framework was explored in practice through a case study about an app supporting relief in the 2020 COVID-19 pandemic, as well as a survey among potential users. The assessment of the framework indicated an average score ranging between 3.58 and 3.92 in a five-point Likert scale for all of the items used in the survey.
- Published
- 2020
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11. Atezolizumab plus bevacizumab versus active surveillance in patients with resected or ablated high-risk hepatocellular carcinoma (IMbrave050): a randomised, open-label, multicentre, phase 3 trial
- Author
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Qin, Shukui, Chen, Minshan, Cheng, Ann-Lii, Kaseb, Ahmed O, Kudo, Masatoshi, Lee, Han Chu, Yopp, Adam C, Zhou, Jian, Wang, Lu, Wen, Xiaoyu, Heo, Jeong, Tak, Won Young, Nakamura, Shinichiro, Numata, Kazushi, Uguen, Thomas, Hsiehchen, David, Cha, Edward, Hack, Stephen P, Lian, Qinshu, Ma, Ning, Spahn, Jessica H, Wang, Yulei, Wu, Chun, Chow, Pierce K H, Thompson, Alexander, Danta, Mark, Poursoltan, Pirooz, Kiberu, Andrew, Chittajallu, Renuka, Sood, Siddarth, Stauber, Rudolf, Pinter, Matthias, Peck-Radosavljevic, Markus, Decaestecker, Jochen, Cuyle, Pieter-Jan, Verset, Gontran, Van Vlierberghe, Hans, De Azevedo, Sergio, Andrade, Livia, Cunha Júnior, Ademar, Faria, Luiza, Yen, Cheng Tzu, Colli, Leandro, Asselah, Jamil, Kavan, Petr, Marquez, Vladimir, Brahmania, Mayur, Li, Qiang, Xing, Baocai, Guo, Yabing, Chen, Zhendong, Zhao, Haitao, Peng, Tao, Wang, Liming, Wang, Lu, Liu, Hongming, Wu, Feixiang, Qin, Lunxiu, Zheng, Qichang, Ying, Jieer, Li, Haitao, Wen, Tianfu, Qin, Shukui, Wen, Xiaoyu, Liu, Yunpeng, Chen, Minshan, Wang, Boqing, Bai, Yuxian, He, Yifu, Zhao, Hong, Zhou, Dong, Dai, Chaoliu, Teng, Gaojun, Cui, Shuzhong, Gao, Yi, Zhang, Xizhi, Lu, Zheng, Yin, Tao, Ding, Youming, Jia, Weidong, Xia, Yongxiang, Sun, Beicheng, Xia, Qiang, Yuan, Yufeng, Sun, Huichuan, Shi, Xuetao, Guzmán, Adrián, Corrales, Luis, Kral, Zdenek, Priester, Peter, Kubala, Eugen, Blanc, Jean Frederic, Bourliere, Marc, Peron, Jean Marie, Borg, Christophe, Bronowicki, Jean-Pierre, Ganne, Nathalie, Decaens, Thomas, Uguen, Thomas, Heurgue, Alexandra, Trojan, Joerg, Gonzalez-Carmona, Maria Angeles, Roderburg, Christoph, Ettrich, Thomas, Schotten, Clemens, Kandulski, Arne, Yau, Thomas, Chan, Lam, Scartozzi, Mario, Masi, Gianluca, Fanello, Silvia, Battezzati, Pier Maria, Leonardi, Francesco, Ghidini, Michele, Numata, Kazushi, Morimoto, Manabu, Hidaka, Hisashi, Tsuchiya, Kaoru, Yamashita, Tatsuya, Kato, Naoya, Kudo, Masatoshi, Hagihara, Atsushi, Koga, Hironori, Arakawa, Tomohiro, Nakamura, Ikuo, Kawamura, Yusuke, Kawaoka, Tomokazu, Shimada, Mitsuo, Hasegawa, Kiyoshi, Marusawa, Hiroyuki, Nakamura, Shinchiro, Hiraoka, Atsushi, Hayashi, Hiromitsu, Takeda, Shin, Lee, Han Chu, Paik, Seung Woon, Kim, Do Young, Lee, Jung Il, Jeong, Sook-Hyang, Kim, Won, Tak, Won Young, Heo, Jeong, Kim, Hyeyeong, Chon, Hong Jae, Cheong, Jaeyoun, Yoon, Seung Kew, Yoon, Jung-Hwan, Villalobos, Ricardo, Martinez Rodriguez, Jorge Luis, Oyervides Juarez, Victor, Hernández, Carlos Alberto, Klumpen, Heinz-Josef, de Vos-Geelen, Judith, Gane, Edward, Montenegro, Paola, Torres Mattos, Cesar, Janczewska, Ewa, Kawecki, Maciej, Nowakowska-Zajdel, Ewa, Fedenko, Alexander, Granov, Dmitrii, Alyasova, Anna, Sekacheva, Marina, Ledin, Evgeny, Samol, Jens, Toh, Han Chong, Calvo Campos, Mariona, Gomez Martin, Carlos, Lopez Lopez, Carlos, Muñoz Martin, Andres Jesus, Calleja Panero, Jose Luis, Montero Alvarez, Jose Luis, Reig Monzón, Maria, Delgado Mingorance, Ignacio, Minguez Rosique, Beatriz, Cheng, Ann Lii, Huang, Yi-Hsiang, Lin, Shi-Ming, Huang, Jee-Fu, Yu, Ming-Lung, Su, Wei-Wen, Korphaisarn, Krittiya, Maneenil, Kunlatida, Samdaengpan, Chayanee, Tharavichitkul, Ekkapong, Ozguroglu, Mustafa, Kose, Fatih, Harputluoglu, Hakan, Buchschacher, Gary, Thuluvath, Paul, Xiong, Henry, Patel, Mital, Gold, Philip, Li, Daneng, Brooks, Gabriel, Masood, Ashiq, Patel, Reema, George, Ben, Salgia, Reena, Manji, Gulam, Crow, Mary, Kaseb, Ahmed, Dugan, Matthew, Kadakia, Kunal, Kardosh, Adel, Gibbs, John, Shah, Ashesh, Burris III, Howard, and Hsiehchen, David
- Abstract
No adjuvant treatment has been established for patients who remain at high risk for hepatocellular carcinoma recurrence after curative-intent resection or ablation. We aimed to assess the efficacy of adjuvant atezolizumab plus bevacizumab versus active surveillance in patients with high-risk hepatocellular carcinoma.
- Published
- 2023
- Full Text
- View/download PDF
12. The Main Parameters Assessment of Clod and Stone Separation from Potato Crop (Inclined Belt Type) in Potato Harvester
- Author
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Hosein Mosalanejad, Hosein Mobli, and Afsaneh Poursoltan
- Subjects
Technology - Abstract
Harvesting practices of potato is one of the most difficult, troublesome and sensitive stages. Potatoes enter the machine with huge amounts of clod and stones: In the meantime separation of potato some stone and clod, which are the same size as of that the potatoes, shall be confide red a major problem. Many methods of study by investigators are based on physical properties of potato, stone and clod. In the present research with regards to the farm conditions and economic situation of the Iranian farmers, the beveled conveyor method is recommended. In this method, primarily a schematic design of the separating section of the stones and clod and the crop was produced and important parameters such as the surface angle, conveyor-belt motion speed and type of the conveyor, which play a key role in the separation stage, were studied. The test was carried out on the factorial basis and complete random block, using 3 angles factors in 5 levels (5,10,15.17.5 and 20 degrees) and the speed on 5 levels (100,200,300,400 and 600 RPM) and the belt type with 2 surfaces (soft and rough) repeated 5 times. The SPSS software was used to analyze data. The result revealed that the ideal combination of the angle, speed and belt type for acquiring the highest separation rate and the least amount of mix clod, stones of the separated potatoes are the order, and the crop would be the angle 15 degrees, the speed of 300 RPM, with the use of soft belt, and the angle of 17.5 degrees and the speed of 200 RPM is recommended for a rough belt.
- Published
- 2010
13. Attitudes of the Victorian oral health workforce to the employment and scope of practice of dental hygienists
- Author
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Hopcraft, M, McNally, C, Ng, C, Pek, L, Pham, T A, Phoon, W L, Poursoltan, P, and Yu, W
- Published
- 2008
- Full Text
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14. Working practices and job satisfaction of Victorian dental hygienists
- Author
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Hopcraft, M, McNally, C, Ng, C, Pek, L, Pham, T A, Phoon, W L, Poursoltan, P, and Yu, W
- Published
- 2008
- Full Text
- View/download PDF
15. Application of Risk Management for Discrete Event Simulation Projects in Healthcare Systems
- Author
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Poursoltan, Milad, Masmoudi, Malek, and Albert, Pascal
- Abstract
AbstractDespite the recent developments of discrete event simulation (DES) techniques as well as the growing tendency for employing DES in health care quite often many DES projects still fail to implement successfully. According to several studies, the application of project risk management can reduce the incidence of DES project failure in health care however, far too little attention has been paid to this part. In this study, a risk management framework is provided for DES projects in health care order to reduce the occurrence of failure and increase the chance of success in the DES project. This work investigates both managerial and technical risks and tries to identify, evaluate, and control them by using a set of adopted methods. Emergency department seems to be the most popular area of DES projects in health care The proposed framework is applied to an emergency department that serves more than 23000 patients per year. The results of this investigation indicate that the risk management of the DES project not only provides a proactive approach for project managers to implement successfully but also improves scenario ranking process which is one of the main outputs for principal stakeholders.
- Published
- 2022
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16. Early Detection of Cardiotoxicity in Cancer Patients Receiving Novel Chemotherapy and Immunomodulation by Measuring Global Longitudinal Strain (GLS) with Transthoracic Echocardiography
- Author
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Al-zubaidi, K., primary, Brown, M., additional, Gurney, H., additional, Kefford, R., additional, and Poursoltan, P., additional
- Published
- 2018
- Full Text
- View/download PDF
17. A new descriptive, theoretical framework for Cyber-physical and human systems based on Activity Theory
- Author
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Poursoltan, Milad, Pinède, Nathalie, Traore, Mamadou Kaba, and Vallespir, Bruno
- Abstract
Given the increasing emergence of cyber-physical and human systems (CPHS) in manufacturing systems, different perceptions of CPHS appeared, which is a barrier to the design and analysis of manufacturing systems in the new industrial revolution. This has given rise to a need for a theory that brings all kinds of CPHSs under a single umbrella and avoids limiting viewpoints to particular cases. This study provides a descriptive, theoretical framework by using Activity Theory (AT) as a lens for a thorough understanding of CPHS in the context of human practice. To the best of our knowledge, this study is the first attempt to take advantage of AT in CPHS. This framework can facilitate the dialectics of engineers, computer, and social scientists in such a way that each can shed light on the other. Through the framework, we describe and formulate the generalizations of the activity system within the sphere of CPHS, illuminate critical issues, and realize how a CPHS is formed and developed. Regardless of application and intended use, the provided theoretical framework is able to describe CPHSs by addressing technological, organizational, social, and human aspects through a typical structure.
- Published
- 2021
- Full Text
- View/download PDF
18. Safety and tolerability of Miltuximab ® - a first in human study in patients with advanced solid cancers.
- Author
-
Sabanathan D, Campbell DH, Velonas VM, Wissmueller S, Mazure H, Trifunovic M, Poursoltan P, Ho Shon K, Mackay TR, Lund ME, Lu Y, Roach PJ, Bailey DL, Walsh BJ, Gillatt D, and Gurney H
- Abstract
Objectives: Miltuximab
® is a chimeric antibody targeting Glypican-1 (GPC-1), a cell surface antigen which is overexpressed in solid cancers. Miltuximab® has shown promising safety and efficacy in radioimmunotherapy models of prostate cancer. This first in human study used Miltuximab® radiolabelled with Gallium-67 ([67 Ga]Ga-DOTA-Miltuximab® ). The primary study endpoint was to establish safety and tolerability of Miltuximab® . Secondary endpoints were biodistribution, tumour targeting and pharmacokinetic analysis., Methods: Four cohorts of three patients (9 with advanced prostate cancer, 2 with pancreatic and 1 with bladder cancer) were dosed with 1 mg, ~250 MBq of [67 Ga]Ga-DOTA-Miltuximab® . Cohort 1 received [67 Ga]Ga-DOTA-Miltuximab® alone, while cohorts 2-4 were pre-infused with increasing doses (3.5, 11.5 and 24 mg, respectively) of unlabelled Miltuximab® -DOTA 1 hour prior to [67 Ga]Ga-DOTA-Miltuximab® . Safety and tolerability were assessed by clinical and standard laboratory assessments. Patients underwent whole body gamma-camera scans and SPECT/CT scans up to 144 h post-infusion. Total organ radiation exposure was determined by dosimetry of whole-body gamma scans., Results: The dosing regimen was well tolerated, with no drug-related adverse events observed. Liver and spleen uptake of [67 Ga]Ga-DOTA-Miltuximab® was observed. Liver uptake was reduced by pre-infusion of unlabelled Miltuximab® -DOTA. Dosimetry analysis showed a favorable exposure profile. [67 Ga]Ga-DOTA-Miltuximab® targeting to tumour sites was observed in two prostate cancer patients who had failed enzalutamide treatment. Higher doses of unlabelled antibody achieved lower liver uptake and increased antibody serum half life., Conclusions: This study is the first in human for Miltuximab® a first in class antibody targeting GPC-1. The trial met its primary endpoint of safety, demonstrating its potential as a safe and tolerable monoclonal antibody. This safety data, together with targeting to tumour lesions and biodistribution information supports the further clinical development of Miltuximab® as a theranostic agent in a planned Phase I human trial., (© 2021 mums.ac.ir All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
19. Primary breast cancer of the vulva: A case report and literature review.
- Author
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Al-Mansouri L, Poursoltan P, Simons M, Muljono A, and Boyages J
- Subjects
- Adenocarcinoma pathology, Adenocarcinoma therapy, Aged, Breast Neoplasms pathology, Breast Neoplasms therapy, Female, Humans, Vulvar Neoplasms pathology, Vulvar Neoplasms therapy, Adenocarcinoma diagnosis, Breast Neoplasms diagnosis, Vulvar Neoplasms diagnosis
- Abstract
An elderly lady presented with a 2-year history of intermittent vaginal bleeding and later the development of a vulvovaginal mass. A core biopsy histology specimen from the mass and the left inguinal lymph node was suggestive of metastatic adenocarcinoma of breast origin. No breast lesion was detected on mammography, and axillary nodes were negative. The histopathologic features and the expression of GATA3, cytokeratin (CK)7, mammaglobin staining and estrogen and progesterone receptors led to a diagnosis of breast cancer originating from the ectopic mammary tissue in the vulva. Given the rarity of these lesions, and the lack of standard treatment guidelines, the management of the patient was extrapolated from the established breast cancer treatment guidelines. Radiotherapy and chemotherapy followed by hormone therapy with aromatase inhibitor were administered to this patient in the metastatic setting with good palliation., (© 2018 Japan Society of Obstetrics and Gynecology.)
- Published
- 2018
- Full Text
- View/download PDF
20. Loss of heterozygosity of the Mutated in Colorectal Cancer gene is not associated with promoter methylation in non-small cell lung cancer.
- Author
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Poursoltan P, Currey N, Pangon L, van Kralingen C, Selinger CI, Mahar A, Cooper WA, Kennedy CW, McCaughan BC, Trent R, and Kohonen-Corish MR
- Subjects
- Adenocarcinoma genetics, Carcinoma, Large Cell genetics, Carcinoma, Non-Small-Cell Lung metabolism, Carcinoma, Squamous Cell genetics, Cell Line, Tumor, Gene Expression Regulation, Neoplastic, Genes, APC, Humans, Lung Neoplasms metabolism, Carcinoma, Non-Small-Cell Lung genetics, DNA Methylation, Genes, MCC, Loss of Heterozygosity, Lung Neoplasms genetics, Promoter Regions, Genetic
- Abstract
'Mutated in Colorectal Cancer' (MCC) is emerging as a multifunctional protein that affects several cellular processes and pathways. Although the MCC gene is rarely mutated in colorectal cancer, it is frequently silenced through promoter methylation. Previous studies have reported loss of heterozygosity (LOH) of the closely linked MCC and APC loci in both colorectal and lung cancers. APC promoter methylation is a marker of poor survival in non-small cell lung cancer (NSCLC). However, MCC methylation has not been previously studied in lung cancer. Therefore, we wanted to determine if MCC is silenced through promoter methylation in lung cancer and whether this methylation is associated with LOH of the MCC locus or methylation of the APC gene. Three polymorphic markers for the APC/MCC locus were analysed for LOH in 64 NSCLC specimens and matching normal tissues. Promoter methylation of both genes was determined using methylation specific PCR in primary tumours. LOH of the three markers was found in 41-49% of the specimens. LOH within the MCC locus was less common in adenocarcinoma (ADC) (29%) than in squamous cell carcinoma (SCC) (72%; P=0.006) or large cell carcinoma (LCC) (75%; P=0.014). However, this LOH was not accompanied by MCC promoter methylation, which was found in only two cancers (3%). In contrast, 39% of the specimens showed APC methylation, which was more common in ADC (58%) than in SCC (13%). Western blotting revealed that MCC was expressed in a subset of lung tissue specimens but there was marked variation between patients rather than between cancer and matching non-cancer tissue specimens. In conclusion, we have shown that promoter methylation of the APC gene does not extend to the neighbouring MCC gene in lung cancer, but LOH is found at both loci. The variable levels of MCC expression were not associated with promoter methylation and may be regulated through other cellular mechanisms., (Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2012
- Full Text
- View/download PDF
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