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1. Somatostatin receptor 2 expression in nasopharyngeal cancer is induced by Epstein Barr virus infection: impact on prognosis, imaging and therapy

Author

Lechner, Matt, Schartinger, Volker H., Steele, Christopher D., Nei, Wen Long, Ooft, Marc Lucas, Schreiber, Liesa-Marie, Pipinikas, Christodoulos P., Chung, Grace Tin-Yun, Chan, Yuk Yu, Wu, Feng, To, Ka-Fai, Tsang, Chi Man, Pearce, Wayne, Morelli, Daniele, Philpott, Martin, Masterson, Liam, Nibhani, Reshma, Wells, Graham, Bell, Christopher G., Koller, Julia, Delecluse, Susanne, Yip, Yim Ling, Liu, Jacklyn, Forde, Cillian T., Forster, Martin D., Jay, Amrita, Dudás, József, Krapp, Annika, Wan, Simon, Uprimny, Christian, Sprung, Susanne, Haybaeck, Johannes, Fenton, Tim R., Chester, Kerry, Thirlwell, Christina, Royle, Gary, Marafioti, Teresa, Gupta, Rajeev, Indrasari, Sagung Rai, Herdini, Camelia, Slim, Mohd Afiq Mohd, Indrawati, I., Sutton, Liam, Fles, Renske, Tan, Bing, Yeong, Joe, Jain, Amit, Han, Shuting, Wang, Haitao, Loke, Kelvin S. H., He, Wan, Xu, Ruilian, Jin, Hongtao, Cheng, Zhiqiang, Howard, David, Hwang, Peter H., Le, Quynh-Thu, Tay, Joshua K., West, Robert B., Tsao, Sai Wah, Meyer, Tim, Riechelmann, Herbert, Oppermann, Udo, Delecluse, Henri-Jacques, Willems, Stefan M., Chua, Melvin L. K., Busson, Pierre, Lo, Kwok Wai, Wollmann, Guido, Pillay, Nischalan, Vanhaesebroeck, Bart, and Lund, Valerie J.

Published
2021
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3. Can Epstein-Barr virus DNA load in nasopharyngeal brushings or whole blood predict recurrent nasopharyngeal carcinoma in a non-endemic region? A prospective nationwide study of the Dutch Head and Neck Oncology Cooperative Group

Author

Stoker, Sharon D., Wildeman, Maarten A., Novalic, Zlata, Fles, Renske, van der Noort, Vincent, de Bree, Remco, Braunius, Weibel W., van den Broek, Guido B., Kreike, Bas, Kross, Kenneth W., Juwana, Hedy, Ramayanti, Octavia, Verkuijlen, Sandra A. W. M., de Boer, Jan Paul, Greijer, Astrid E., Middeldorp, Jaap M., and Tan, I. Bing

Published
2016
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8. Comprehensive Assessment of Incidence, Risk Factors, and Mechanisms of Impaired Medical and Psychosocial Health Outcomes among Adolescents and Young Adults with Cancer: Protocol of the Prospective Observational COMPRAYA Cohort Study

Author

Husson, Olga, primary, Ligtenberg, Marjolijn J. L., additional, van de Poll-Franse, Lonneke V., additional, Prins, Judith B., additional, van den Bent, Martin J., additional, van Eenbergen, Mies C., additional, Fles, Renske, additional, Manten-Horst, Eveliene, additional, Gietema, Jourik A., additional, and van der Graaf, Winette T. A., additional

Published
2021
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9. Comprehensive assessment of incidence, risk factors, and mechanisms of impaired medical and psychosocial health outcomes among adolescents and young adults with cancer:Protocol of the prospective observational compraya cohort study

Author

Husson, Olga, Ligtenberg, Marjolijn J.L., van de Poll-Franse, Lonneke V., Prins, Judith B., van den Bent, Martin J., van Eenbergen, Mies C., Fles, Renske, Manten-Horst, Eveliene, Gietema, Jourik A., van der Graaf, Winette T.A., Husson, Olga, Ligtenberg, Marjolijn J.L., van de Poll-Franse, Lonneke V., Prins, Judith B., van den Bent, Martin J., van Eenbergen, Mies C., Fles, Renske, Manten-Horst, Eveliene, Gietema, Jourik A., and van der Graaf, Winette T.A.

Abstract

Adolescent and young adult (AYA) cancer patients suffer from delay in diagnosis, and lack of centralized cancer care, age-adjusted expertise, and follow-up care. This group presents with a unique spectrum of cancers, distinct tumor biology, cancer risk factors, developmental challenges, and treatment regimens that differ from children and older adults. It is imperative for advances in the field of AYA oncology to pool data sources across institutions and create large cohorts to address the many pressing questions that remain unanswered in this vulnerable population. We will create a nationwide infrastructure (COMPRAYA) for research into the incidence, predictive/prognostic markers, and underlying mechanisms of medical and psychosocial outcomes for AYA between 18–39 years diagnosed with cancer. A prospective, observational cohort of (n = 4000), will be es-tablished. Patients will be asked to (1) complete patient-reported outcome measures; (2) donate a blood, hair, and stool samples (to obtain biochemical, hormonal, and inflammation parameters, and germline DNA); (3) give consent for use of routinely archived tumor tissue and clinical data extraction from medical records and registries; (4) have a clinic visit to assess vital parameters. Systematic and comprehensive collection of patient and tumor characteristics of AYA will support the development of evidence-based AYA care programs and guidelines.

Published
2021

10. Comprehensive assessment of incidence, risk factors, and mechanisms of impaired medical and psychosocial health outcomes among adolescents and young adults with cancer: Protocol of the prospective observational COMPRAYA cohort study

Author

Husson, Olga, Ligtenberg, Marjolijn J. L., van de Poll-Franse, Lonneke V., Prins, Judith B., van den Bent, Martin J., van Eenbergen, Mies C., Fles, Renske, Manten-Horst, Eveliene, Gietema, Jourik A., van der Graaf, Winette T. A., Husson, Olga, Ligtenberg, Marjolijn J. L., van de Poll-Franse, Lonneke V., Prins, Judith B., van den Bent, Martin J., van Eenbergen, Mies C., Fles, Renske, Manten-Horst, Eveliene, Gietema, Jourik A., and van der Graaf, Winette T. A.

Abstract

Adolescents and young adults (AYA), aged 18-39 years at first cancer diagnosis, are recognized as a distinct population within the oncology community due to the unique challenges they encounter including recognition, diagnosis, treatment, and monitoring of their disease. It is imperative for advances in the field of AYA oncology to pool data sources (patient-reported outcomes, clinical, treatment, genetic, and biological data) across institutions and countries and create large cohorts that include the full range of AYA ages and diagnoses to be able to address the many pressing questions that remain unanswered in this vulnerable population. The Dutch COMPRAYA study aims to examine the incidence, risk factors, and mechanisms of impaired health outcomes (short- and long-term medical and psychosocial effects) over time among AYA cancer patients. The overarching aim is to provide a research infrastructure for (future) data analyses and observational retrospective/prospective ancillary studies and to expand data collection to other countries.Adolescent and young adult (AYA) cancer patients suffer from delay in diagnosis, and lack of centralized cancer care, age-adjusted expertise, and follow-up care. This group presents with a unique spectrum of cancers, distinct tumor biology, cancer risk factors, developmental challenges, and treatment regimens that differ from children and older adults. It is imperative for advances in the field of AYA oncology to pool data sources across institutions and create large cohorts to address the many pressing questions that remain unanswered in this vulnerable population. We will create a nationwide infrastructure (COMPRAYA) for research into the incidence, predictive/prognostic markers, and underlying mechanisms of medical and psychosocial outcomes for AYA between 18-39 years diagnosed with cancer. A prospective, observational cohort of (n = 4000), will be established. Patients will be asked to (1) complete patient-reported outco

Published
2021

12. Can an online clinical data management service help in improving data collection and data quality in a developing country setting?

Author

Wildeman Maarten A, Zandbergen Jeroen, Vincent Andrew, Herdini Camelia, Middeldorp Jaap M, Fles Renske, Dalesio Otilia, van der Donk Emile, and Tan I Bing

Subjects
Medicine (General), R5-920
Abstract

Background Data collection by Electronic Medical Record (EMR) systems have been proven to be helpful in data collection for scientific research and in improving healthcare. For a multi-centre trial in Indonesia and the Netherlands a web based system was selected to enable all participating centres to easily access data. This study assesses whether the introduction of a Clinical Trial Data Management service (CTDMS) composed of electronic Case Report Forms (eCRF) can result in effective data collection and treatment monitoring. Methods Data items entered were checked for inconsistencies automatically when submitted online. The data were divided into primary and secondary data items. We analysed both the total number of errors and the change in error rate, for both Primary and Secondary items, over the first five month of the trial. Results In the first five months 51 patients were entered. The Primary data error rate was 1.6%, whilst that for Secondary data was 2.7% against acceptable error rates for analysis of 1% and 2.5% respectively. Conclusion The presented analysis shows that after five months since the introduction of the CTDMS the Primary and Secondary data error rates reflect acceptable levels of data quality. Furthermore, these error rates were decreasing over time. The digital nature of the CTDMS, as well as the online availability of that data, gives fast and easy insight in adherence to treatment protocols. As such, the CTDMS can serve as a tool to train and educate medical doctors and can improve treatment protocols.

Published
2011
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13. Knowledge of general practitioners about nasopharyngeal cancer at the Puskesmas in Yogyakarta, Indonesia

Author

Haryana Sofia, Sulistiono Beni, Wildeman Maarten A, Fles Renske, and Tan I

Subjects
Special aspects of education, LC8-6691, Medicine
Abstract

Abstract Background Nasopharyngeal carcinoma (NPC) is one of the leading causes of cancer death in Indonesia. At initial diagnosis, 80% of the patients present with advanced stage disease. In Indonesia, primary medical care is generally provided by the health care centres; named Puskesmas. The lack of knowledge of various aspects of NPC of the General practitioners (GPs) working in these centers might contribute to the diagnostic delay. The aim of this study was to assess the knowledge of these GPs on different aspects of NPC including symptoms, risk factors and incidence. Methods One hundred six GPs in the Puskesmas in the Yogyakarta province were subjected to a questionnaire on different aspects of NPC based on literature and interviews with Head and Neck Surgeons. Results All GPs approached participated and in total 106 questionnaires were filled in. All participants were aware of NPC as a disease and 89% confirmed that it is a serious problem in Indonesia. However, 50% of the participants believed NPC has a low incidence in their region. The question on early symptoms gave a mean 4.2 answers of which 50% were incorrect. The GPs provided a total of 318 answers when asked for the risk factors of NPC, 75% of which were incorrect. Fifty seven GPs (54%) stated that they did not receive sufficient education on NPC at the university and insufficient knowledge was gained during daily practice. Ninety-two percent of the GPs were interested in additional education, preferably in form of lectures, meetings or folders. Conclusion This study revealed that GPs in the Puskesmas in Yogyakarta lack knowledge on all aspects of NPC. This is an important finding as NPC is endemic in Indonesia and the Puskesmas are the institutions which provide primary medical health care in the country. Further education of the GPs in these endemic areas could be a first step to increase the rate of early detection. Therefore, we suggest 1) to conduct a medical awareness campaign for GPs on the most important subjects concerning NPC, and 2) as soon as NPC awareness among GPs has risen, provide further education on the risk factors, the early symptoms and the incidence, education to the community. We propose to extend this study to other areas in Indonesia (i.e. Jakarta, Surabaya, Central Java), using models that have been developed in Yogyakarta.

Published
2010
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14. Evaluation of diagnosis and treatment of nasopharyngeal carcinoma in Indonesia: the necessity of a multilevel approach

Author

Fles, Renske, Fles, Renske, Fles, Renske, and Fles, Renske

Abstract

Nasopharyngeal cancer is rare in the Netherlands but common in Indonesia. Compared to the treatment results in other countries, post-treatment survival rates are far lower in Indonesia. This PhD dissertation concludes that improvements in treatment results can only be achieved by intervening at three levels: the patient, the general practitioner and the healthcare system. This means that communities have to be made more aware of the symptoms of this form of cancer, which is widespread in Indonesia, GPs have to refer patients to the appropriate medical specialist sooner and patients have to be able to start treatment in time and complete it within a set time frame.

Published
2016

15. Proceedings of the 7th Biannual International Symposium on Nasopharyngeal Carcinoma 2015

Author

Tan, IB, Chang, Ellen T., Chen, Chien-Jen, Hsu, Wan-Lun, Chien, Yin-Chu, Hildesheim, Allan, McKay, James D., Gaborieau, Valerie, Kaderi, Mohamed Arifin Bin, Purnomosari, Dewajani, Voegele, Catherine, LeCalvez-Kelm, Florence, Byrnes, Graham, Brennan, Paul, Devi, Beena, Li, L., Zhang, Y., Fan, Y., Sun, K., Du, Z., Sun, H., Chan, A. T., Tsao, S. W., Zeng, Y. X., Tao, Q., Busson, Pierre, Lhuillier, Claire, Morales, Olivier, Mrizak, Dhafer, Gelin, Aurore, Kapetanakis, Nikiforos, Delhem, Nadira, Mansouri, Sheila, Cao, Jennifer, Vaidya, Anup, Frappier, Lori, Wai, Lo Kwok, Chen, Sui-Hong, Du, Jin-lin, Ji, Ming-Fang, Huang, Qi-Hong, Liu, Qing, Cao, Su-Mei, Doolan, Denise L., Coghill, Anna, Mulvenna, Jason, Proietti, Carla, Lekieffre, Lea, Bethony, Jeffrey, Hildesheim, and Allan, Fles, Renske, Indrasari, Sagung Rai, Herdini, Camelia, Martini, Santi, Isfandiari, Atoillah, Rhomdoni, Achmad, Adham, Marlinda, Mayangsari, Ika, van Werkhoven, Erik, Wildeman, Maarten, Hariwiyanto, Bambang, Hermani, Bambang, Kentjono, Widodo Ario, Haryana, Sofia Mubarika, Schmidt, Marjanka, O’Sullivan, Brian, Ozyar, Enis, Lee, Anne W. M., Zeng, Mu-Sheng, Gao, Xiaojiang, Tang, Minzhong, Martin, Pat, Zeng, Yi, Carrington, Mary, Coghill, Anna E., Bu, Wei, Nguyen, Hanh, Yu, Kelly J., Lou, Pei-Jen, Wang, Cheng-Ping, Cohen, Jeffrey I., King, Ann D., Chen, Tseng-Cheng, Lin, Ching-Yuan, Tsou, Yung-An, Leu, Yi-Shing, Laio, Li-Jen, Chang, Yen-Liang, Hua, Chun-Hun, Wu, Ming-Shiang, Hsiao, Chu-Hsing Kate, Lee, Jehn-Chuan, Tsai, Ming-Hsui, Cheng, Skye Hung-Chun, Liao, Li-Jen, Yang, Tsung-Lin, Ko, Jenq-Yuh, Ko, Josephine Mun Yee, Dai, Wei, Kwong, Dora, Ng, Wai Tong, Lee, Anne, Ngan, Roger Kai Cheong, Yau, Chun Chung, Tung, Stewart, Lung, Maria Li, Ji, Mingfang, Sheng, Wei, Ng, Mun Hon, Cheng, Weimin, Yu, Xia, Wu, Biaohua, Wei, Kuangrong, Zhan, Jun, Zeng, Yi Xin, Cao, Su Mei, Xia, Ningshao, Yuan, Yong, Cui, Qian, Xu, Miao, Bei, Jin-Xin, Zeng, Yi-Xin, Şahin, B, Dizman, A, Esassolak, M, İkizler, A Saran, Yıldırım, HC, Çaloğlu, M, Atalar, B, Akman, F, Demiroz, C, Atasoy, BM, Canyilmaz, E, Igdem, S, Ugurluer, G, Kütük, T, Akmansoy, M, Ozyar, E, Sommat, Kiattisa, Wang, Fu Qiang, Kwok, Li-Lian, Tan, Terence, Fong, Kam Weng, Soong, Yoke Lim, Cheah, Shie Lee, Wee, Joseph, Casanova, M, Özyar, E, Patte, C, Orbach, D, Ferrari, A, Cristine, VF, Errihani, H, Pan, J, Zhang, L, Liji, S, Grzegorzewski, K, Gore, L, Varan, A, Hutajulu, Susanna Hilda, Khuzairi, Guntara, Kusumo, Henry, Hardianti, Mardiah Suci, Taroeno-Hariadi, Kartika Widayati, Purwanto, Ibnu, Kurnianda, Johan, Messick, Troy E., Malecka, Kimberly, Tolvinski, Lois, Soldan, Samantha, Deakyne, Julianna, Song, Hui, van den Heuvel, Antonio, Gu, Baiwei, Cassel, Joel, McDonnell, Mark, Smith, Garry R., Velvadapu, Venkata, Bian, Haiyan, Zhang, Yan, Carlsen, Marianne, Chen, Shuai, Donald, Alastair, Lemmen, Christian, Reitz, Allen B., Lieberman, Paul M., Chan, King Chi, Chan, Lai Sheung, Lo, Kwok Wai, Yip, Timothy Tak Chun, Kahn, Michael, Mak, Nai Ki, Liu, Fei-Fei, Khaali, Wafa, Thariat, Juliette, Fantin, Laurence, Spirito, Flavia, Khyatti, Meriem, Driss, El Khalil Ben, Olivero, Sylvain, Maryanski, Janet, Doglio, Alain, Xia, Mengxue, Xia, Yunfei, Chang, Hui, Shaw, Rachel, Rahaju, Pudji, Wisesa, Sindhu, Taroeno-Harijadi, Kartika Widayati, Dhamiyati, Wigati, Tan, Sang-Nee, Sim, Sai-Peng, Yusuf, Muhtarum, Romdhoni, Ahmad C., K, Widodo Ario, Rantam, Fedik Abdul, Sugiyanto, Aryati, Lina, Adi-Kusumo, Fajar, Bintoro, SY, Oktriani, R., Herawati, C., Surono, A., Haryana, Sofia M., Zhong, L., Ma, B. B., Kalra, M., Ngo, M., Perna, S., Leen, A., Lapteva, N., Rooney, C. M., Gottschalk, S., Mustikaningtyas, Elida, Herawati, Sri, Romdhoni, Achmad C., Xu, Yarui, Ge, Shengxiang, Li, Fugui, Ng, M. H., Tan, Louise SY, Wong, Benjamin, Lim, C. M., Rantam, Fedik A., Madani, Deasy Z., Akbar, Nur, Permana, Agung Dinasti, Fachiroh, Jajah, Hartati, Dwi, Rahayudjati, T. Baning, Darwis, Iswandi, Anwar, Khoirul, Dwidanarti, Sri Retna, Pramana, Dominicus Wendhy, Safitri, Diah Ari, Danarti, Sri Retna Dwi, Taroeno, Suryo A, Wijaya, I., Oehadian, A., Prasetya, D., Yu, Kelly J, Rahman, Sukri, Budiman, Bestari J., Novialdi, Rahmadona, Lestari, Dewi Yuri, Yin, C., Foussadier, A., Blein, E., Chen, C., Ammour, N. Bournet, Khiatti, M., Cao, S., Marzaini, Dewi Syafriyetti Soeis, Rahayujati, Baning, Gunawan, L., Mubarika Haryana, S., Hartono, Michael, Intansari, Umi, Paramita, Dewi Kartikawati, Akbar, Akmal, Hermawan, Benny, Paramita, Dewi K., Argy, Gabriella, Sihotang, Theodora Caroline, Wahyono, Daniel Joko, Soeharso, Purnomo, Suryandari, Dwi Anita, Lisnawati, Musa, Zanil, Daker, Maelinda, Tzen, Yeo Jiun, Bakar, Norhasimah, Rahman, Asma’ Saiyidatina Aishah Abdul, Ahmad, Munirah, Chia, Yeo Tiong, Beng, Alan Khoo Soo, Sasikirana, Widyandani, Wardana, Tirta, Radifar, Muhammad, Herawati, Cita, Surono, Agus, and Çocuk Sağlığı ve Hastalıkları

Subjects
Meeting Abstracts
Abstract

A1 Hope and despair in the current treatment of nasopharyngeal cancer, IB Tan, I1 NPC international incidence and risk factors, Ellen T Chang, I2 Familial nasopharyngeal carcinoma and the use of biomarkers, Chien-Jen Chen, Wan-Lun Hsu, Yin-Chu Chien, I3 Genetic susceptibility risk factors for sporadic and familial NPC: recent findings, Allan Hildesheim, I5 Genetic and environmental risk factors for nasopharyngeal cancer in Southeast Asia, James D McKay, Valerie Gaborieau, Mohamed Arifin Bin Kaderi, Dewajani Purnomosari, Catherine Voegele, Florence LeCalvez-Kelm, Graham Byrnes, Paul Brennan, Beena Devi, I6 Characterization of the NPC methylome identifies aberrant epigenetic disruption of key signaling pathways and EBV-induced gene methylation, Li L, Zhang Y, Fan Y, Sun K, Du Z, Sun H, Chan AT, Tsao SW, Zeng YX, Tao Q, I7 Tumor exosomes and translational research in NPC, Pierre Busson, Claire Lhuillier, Olivier Morales, Dhafer Mrizak, Aurore Gelin, Nikiforos Kapetanakis, Nadira Delhem, I8 Host manipulations of the Epstein-Barr virus EBNA1 protein, Sheila Mansouri, Jennifer Cao, Anup Vaidya, and Lori Frappier, I9 Somatic genetic changes in EBV-associated nasopharyngeal carcinoma, Lo Kwok Wai, I10 Preliminary screening results for nasopharyngeal carcinoma with ELISA-based EBV antibodies in Southern China, Sui-Hong Chen, Jin-lin Du, Ming-Fang Ji, Qi-Hong Huang, Qing Liu, Su-Mei Cao, I11 EBV array platform to screen for EBV antibodies associated with NPC and other EBV-associated disorders, Denise L. Doolan, Anna Coghill, Jason Mulvenna, Carla Proietti, Lea Lekieffre, Jeffrey Bethony, and Allan Hildesheim, I12 The nasopharyngeal carcinoma awareness program in Indonesia, Renske Fles, Sagung Rai Indrasari, Camelia Herdini, Santi Martini, Atoillah Isfandiari, Achmad Rhomdoni, Marlinda Adham, Ika Mayangsari, Erik van Werkhoven, Maarten Wildeman, Bambang Hariwiyanto, Bambang Hermani, Widodo Ario Kentjono, Sofia Mubarika Haryana, Marjanka Schmidt, IB Tan, I13 Current advances and future direction in nasopharyngeal cancer management, Brian O’Sullivan, I14 Management of juvenile nasopharyngeal cancer, Enis Ozyar, I15 Global pattern of nasopharyngeal cancer: correlation of outcome with access to radiotherapy, Anne WM Lee, I16 The predictive/prognostic biomarker for nasopharyngeal carcinoma, Mu-Sheng Zeng, I17 Effect of HLA and KIR polymorphism on NPC risk, Xiaojiang Gao, Minzhong Tang, Pat Martin, Yi Zeng, Mary Carrington, I18 Exploring the Association between Potentially Neutralizing Antibodies against EBV Infection and Nasopharyngeal Carcinoma, Anna E Coghill, Wei Bu, Hanh Nguyen, Wan-Lun Hsu, Kelly J Yu, Pei-Jen Lou, Cheng-Ping Wang, Chien-Jen Chen, Allan Hildesheim, Jeffrey I Cohen, I19 Advances in MR imaging in NPC, Ann D King, O1 Epstein-Barr virus seromarkers and risk of nasopharyngeal carcinoma: the gene-environment interaction study on nasopharyngeal carcinoma in Taiwan, Yin-Chu Chien, Wan-Lun Hsu, Kelly J Yu, Tseng-Cheng Chen, Ching-Yuan Lin, Yung-An Tsou, Yi-Shing Leu, Li-Jen Laio, Yen-Liang Chang, Cheng-Ping Wang, Chun-Hun Hua, Ming-Shiang Wu, Chu-Hsing Kate Hsiao, Jehn-Chuan Lee, Ming-Hsui Tsai, Skye Hung-Chun Cheng, Pei-Jen Lou, Allan Hildesheim, Chien-Jen Chen, O2 Familial tendency and environmental co-factors of nasopharyngeal carcinoma: the gene-environment interaction study on nasopharyngeal carcinoma in Taiwan, Wan-Lun Hsu, Kelly J Yu, Yin-Chu Chien, Tseng-Cheng Chen, Ching-Yuan Lin, Yung-An Tsou, Yi-Shing Leu, Li-Jen Liao, Yen-Liang Chang, Tsung-Lin Yang, Chun-Hun Hua, Ming-ShiangWu, Chu-Hsing Kate Hsiao, Jehn-ChuanLee, Ming-Hsui Tsai, Skye Hung-Chun Cheng, Jenq-Yuh Ko, Allan Hildesheim, Chien-Jen Chen, O3 The genetic susceptibility and prognostic role of TERT-CLPTM1L and genes in DNA damage pathways in NPC, Josephine Mun Yee Ko, Wei Dai, Dora Kwong, Wai Tong Ng, Anne Lee, Roger Kai Cheong Ngan, Chun Chung Yau, Stewart Tung, Maria Li Lung, O4 Long term effects of NPC screening, Mingfang Ji, Wei Sheng, Mun Hon Ng, Weimin Cheng, Xia Yu, Biaohua Wu, Kuangrong Wei, Jun Zhan, Yi Xin Zeng, Su Mei Cao, Ningshao Xia, Yong Yuan, O5 Risk prediction of nasopharyngeal carcinoma by detecting host genetic and Epstein-Barr virus variation in saliva, Qian Cui, Miao Xu, Jin-Xin Bei, Yi-Xin Zeng, O6 Patterns of care study in Turkish nasopharyngeal cancer patients (NAZOTURK): A Turkish Radiation Oncology Association Head and Neck Cancer Working Group Study, B Şahin, A Dizman, M Esassolak, A Saran İkizler, HC Yıldırım, M Çaloğlu, B Atalar, F Akman, C Demiroz, BM Atasoy, E Canyilmaz, S Igdem, G Ugurluer, T Kütük, M Akmansoy, E Ozyar, O7 Long term outcome of intensity modulated radiotherapy in nasopharyngeal carcinoma in National Cancer Centre Singapore, Kiattisa Sommat, Fu Qiang Wang, Li-Lian Kwok, Terence Tan, Kam Weng Fong, Yoke Lim Soong, Shie Lee Cheah, Joseph Wee, O8 International phase II randomized study on the addition of docetaxel to the combination of cisplatin and 5-fluorouracil in the induction treatment for nasopharyngeal carcinoma in children and adolescents, M Casanova, E Özyar, C Patte, D Orbach, A Ferrari, VF Cristine, H Errihani, J Pan, L Zhang, S Liji, K Grzegorzewski, L Gore, A Varan, O9 Prognostic impact of metastatic status in patients with nasopharyngeal carcinoma, Susanna Hilda Hutajulu, Guntara Khuzairi, Camelia Herdini, Henry Kusumo, Mardiah Suci Hardianti, Kartika Widayati Taroeno-Hariadi, Ibnu Purwanto, Johan Kurnianda, O10 Development of small molecule inhibitors of latent Epstein-Barr virus infection for the treatment of nasopharyngeal carcinoma, Troy E. Messick, Kimberly Malecka, Lois Tolvinski, Samantha Soldan, Julianna Deakyne, Hui Song, Antonio van den Heuvel, Baiwei Gu, Joel Cassel, Mark McDonnell, Garry R Smith, Venkata Velvadapu, Haiyan Bian, Yan Zhang, Marianne Carlsen, Shuai Chen, Alastair Donald, Christian Lemmen, Allen B Reitz, Paul M Lieberman, O11 Therapeutic targeting of cancer stem-like cells using a Wnt modulator, ICG-001, enhances the treatment outcome of EBV-positive nasopharyngeal carcinoma, King Chi Chan, Lai Sheung Chan, Kwok Wai Lo, Timothy Tak Chun Yip, Roger Kai Cheong Ngan, Michael Kahn, Maria Li Lung, Nai Ki Mak, O12 Role of micro-RNA in NPC biology, Fei-Fei Liu, O13 Expansion of EBNA1- and LMP2-specific effector T lymphocytes from patients with nasopharyngeal carcinoma without enhancement of regulatory T cells, Wafa Khaali; Juliette Thariat; Laurence Fantin; Flavia Spirito; Meriem Khyatti; El Khalil Ben Driss; Sylvain Olivero; Janet Maryanski; Alain Doglio, O14 The experience of patients’ life after amifostine radiotherapy treatment (ART) for nasopharyngeal carcinoma (NPC), Mengxue Xia, Yunfei Xia, Hui Chang, Rachel Shaw, O15 Analysis of mitochondrial DNA mutation in latent membrane protein-1 positive nasopharyngeal carcinoma, Pudji Rahaju, O16 Factors influencing treatment adherence of nasopharyngeal cancer and the clinical outcomes: a hospital-based study, Mardiah Suci Hardianti, Sindhu Wisesa, Kartika Widayati Taroeno-Harijadi, Ibnu Purwanto, Bambang Hariwiyanto, Wigati Dhamiyati, Johan Kurnianda, O17 Chromosomal breaks mediated by bile acid-induced apoptosis in nasopharyngeal epithelial cells: in relation to matrix association region/scaffold attachment region, Sang-Nee Tan, Sai-Peng Sim, O18 Expression of p53 (wild type) on nasopharyngeal carcinoma stem cell that resistant to radiotherapy, Muhtarum Yusuf, Ahmad C Romdhoni, Widodo Ario K, Fedik Abdul Rantam, O19 Mathematical model of nasopharyngeal carcinoma in cellular level, Sugiyanto, Lina Aryati, Fajar Adi-Kusumo, Mardiah Suci Hardianti, O20 Differential expression of microRNA-21 on nasopharyngeal carcinoma plasma patient, SY Bintoro, R Oktriani, C. Herawati, A Surono, Sofia M. Haryana, O21 Therapeutic targeting of an oncogenic fibroblast growth factor-FGF19, which promotes proliferation and induces EMT of carcinoma cells through activating ERK and AKT signaling, L. Zhong, L. Li, B. B. Ma, A. T. Chan, Q. Tao, O22 Resist nasopharyngeal carcinoma (NPC): next generation T cells for the adoptive immunotherapy of NPC, M. Kalra, M. Ngo, S. Perna, A. Leen, N. Lapteva, C. M. Rooney, S. Gottschalk, O23 The correlation of heat shock protein 70 expressions and staging of nasopharyngeal carcinoma, Elida Mustikaningtyas, Sri Herawati, Achmad C Romdhoni, O24 Epstein-Barr virus serological profiles of nasopharyngeal carcinoma - A tribute to Werner Henle, Mingfang Ji, YaruiXu, Weimin Cheng, ShengxiangGe, Fugui Li, M. H. Ng, O25 Targeting the apoptosis pathway using combination TLR3 agonist with anti-survivin molecule (YM-155) in nasopharyngeal carcinoma, Louise SY Tan, Benjamin Wong, CM Lim, O26 The resistance mechanism of nasopharyngeal cancer stem cells to cisplatin through expression of CD44, Hsp70, p53 (wild type), Oct-4, and ß-catenin encoded-genes, Achmad C Romdhoni, Fedik A. Rantam, Widodo Ario Kentjono, P1 Prevalence of nasopharyngeal carcinoma patients at Departement of Otorhinolaringology-Head and Neck Surgery, Dr. Hasan Sadikin general hospital, Bandung, Indonesia in 2010-2014, Deasy Z Madani, Nur Akbar, Agung Dinasti Permana, P2 Case report on pediatric nasopharyngeal carcinoma at Dr. Sardjito Hospital, Yogyakarta, Camelia Herdini, Sagung Rai Indrasari, Jajah Fachiroh, Dwi Hartati, T. Baning Rahayudjati, P3 Report on loco regionally advanced nasopharyngeal cancer patients treated with induction chemotherapy followed by concurrent chemo-radiation therapy, Iswandi Darwis, Susanna Hilda Hutajulu, Bambang Hariwiyanto, Wigati Dhamiyati, Ibnu Purwanto, Kartika Widayati Taroeno-Hariadi, Johan Kurnianda, P4 Sex and age differences in the survival of patients with nasopharyngeal carcinoma, Sindhu Wisesa, Mardiah Suci Hardianti, Susanna Hilda Hutajulu, Kartika Widayati Taroeno-Harijadi, Ibnu Purwanto, Camelia Herdini, Wigati Dhamiyati, Johan Kurnianda, P5 Impact of delayed diagnosis and delayed therapy in the treatment outcome of patients with nasopharyngeal carcinoma, Khoirul Anwar, Susanna Hilda Hutajulu, Sagung Rai Indrasari, Sri Retna Dwidanarti, Ibnu Purwanto, Kartika Widayati Taroeno-Hariadi, Johan Kurnianda, P6 Anaysis of pretreatment anemia in nasopharyngeal cancer patients undergoing neoadjuvant therapy, Dominicus Wendhy Pramana, Susanna Hilda Hutajulu, Bambang Hariwiyanto, Wigati Dhamiyati, Ibnu Purwanto, Kartika Widayati Taroeno-Hariadi, Johan Kurnianda, P7 Results of treatment with neoadjuvant cisplatin-5FU in locally advanced nasopharyngeal carcinoma: a local experience, Diah Ari Safitri, Susanna Hilda Hutajulu, Camelia Herdini, Sri Retna Dwi Danarti, Ibnu Purwanto, Kartika Widayati Taroeno-Hariadi, Johan Kurnianda, P8 Geriatrics with nasopharyngeal cancer, Suryo A Taroeno, Sindhu Wisesa, Kartika Widayati Taroeno-Hariadi, Ibnu Purwanto, Bambang Hariwiyanto, Wigati Dhamiyati, Johan Kurnianda, P9 Correlation of lymphocyte to monocyte and neutrophil to lymphocyte ratio to the response of cisplatin chemoradiotheraphy in locally advance nasopharyngeal carcinoma, I. Wijaya, A. Oehadian, D. Prasetya, P10 Prediction of nasopharyngeal carcinoma risk by Epstein-Barr virus seromarkers and environmental co-factors: the gene-environment interaction study on nasopharyngeal carcinoma in Taiwan, Wan-Lun Hsu, Yin-Chu Chien, Kelly J Yu, Cheng-Ping Wang, Ching-Yuan Lin, Yung-An Tsou, Yi-Shing Leu, Li-Jen Liao, Yen-Liang Chang191,192, Jenq-Yuh Ko, Chun-Hun Hua, Ming-Shiang Wu, Chu-Hsing Kate Hsiao, Jehn-Chuan Lee, Ming-Hsui Tsai, Skye Hung-Chun Cheng, Pei-Jen Lou, Allan Hildesheim, Chien-Jen Chen, P11 Non-viral risk factors for nasopharyngeal carcinoma in West Sumatra, Indonesia, Sukri Rahman, Bestari J. Budiman, Novialdi, Rahmadona, Dewi Yuri Lestari, P12 New prototype Vidas EBV IgA quick: performance on Chinese and Moroccan populations, C. Yin, A. Foussadier, E. Blein, C. Chen, N. Bournet Ammour, M. Khiatti, S. Cao, P13 The expression of EBV-LMP1 and VEGF as predictors and plasma EBV-DNA levels as early marker of distant metastasis after therapy in nasopharyngeal cancer, Dewi Syafriyetti Soeis Marzaini, P14 Characteristics and factors influencing subjects refusal for blood samples retrieval: lesson from NPC case control study in Yogyakarta – Indonesia, Dwi Hartati, Baning Rahayujati, Camelia Herdini, Jajah Fachiroh, P15 Expression of microRNA BART-7-3p and mRNA PTEN on blood plasma of patients with nasopharyngeal carcinoma, L. Gunawan, S. Mubarika Haryana, A. Surono, C. Herawati, P16 IgA response to native early antigen (IgA-EAext) of Epstein-Barr virus (EBV) in healthy population and nasopharyngeal carcinoma (NPC) patients: the potential for diagnosis and screening tools, Michael Hartono, Jajah Fachiroh, Umi Intansari, Dewi Kartikawati Paramita, P17 IgA responses against Epstein-Barr Virus Early Antigen (EBV-EA) peptides as potential candidates of nasopharyngeal carcinoma detection marker, Akmal Akbar, Jajah Fachiroh, Dewi Kartikawati Paramita, P18 Association between smoking habit and IgA-EBV titer among healthy individuals in Yogyakarta, Indonesia, Benny Hermawan, T Baning Rahayudjati, Dewi K Paramita, Jajah Fachiroh, P19 Epstein-Barr virus IgA titer comparison of healthy non-family individuals and healthy first degree family of NPV patients, Gabriella Argy, Jajah Fachiroh, Dewi Kartikawati Paramita, Susanna Hilda Hutajulu, P20 Identification of EBV Early Antigen (EA) derived peptides for NPC diagnosis, Theodora Caroline Sihotang, Jajah Fachiroh, Umi Intansari, Dewi Kartikawati Paramita, P21 Host-pathogen study: relative expression of mRNA BRLF1 Epstein-Barr virus as a potential biomarker for tumor progressivity and polymorphisms of TCRBC and TCRGC2 host genes related to genetic susceptibility on nasopharyngeal carcinoma, Daniel Joko Wahyono, Purnomo Soeharso, Dwi Anita Suryandari, Lisnawati, Zanil Musa, Bambang Hermani, P22 In vitro efficacy of silvestrol and episilvestrol, isolated from Borneo, on nasopharyngeal carcinoma, a major cancer in Borneo, Maelinda Daker, Yeo Jiun Tzen, Norhasimah Bakar, Asma’ Saiyidatina Aishah Abdul Rahman, Munirah Ahmad, Yeo Tiong Chia, Alan Khoo Soo Beng, P23 The expression of mir-141 in patients with nasopharyngeal cancer, Widyandani Sasikirana, Tirta Wardana, Muhammad Radifar, Cita Herawati, Agus Surono, Sofia Mubarika Haryana

Published
2016

16. Evaluation of diagnosis and treatment of nasopharyngeal carcinoma in Indonesia

Author

Fles, Renske, Tan, Bing, Schmidt, Marjanka K., Haryana, S.M., RS: GROW - R2 - Basic and Translational Cancer Biology, Promovendi ODB, and KNO

Subjects
treatment, Indonesia, nasopharyngeal cancer
Abstract

Nasopharyngeal cancer is rare in the Netherlands but common in Indonesia. Compared to the treatment results in other countries, post-treatment survival rates are far lower in Indonesia. This PhD dissertation concludes that improvements in treatment results can only be achieved by intervening at three levels: the patient, the general practitioner and the healthcare system. This means that communities have to be made more aware of the symptoms of this form of cancer, which is widespread in Indonesia, GPs have to refer patients to the appropriate medical specialist sooner and patients have to be able to start treatment in time and complete it within a set time frame.

Published
2016
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17. Can Epstein-Barr virus DNA load in nasopharyngeal brushings or whole blood predict recurrent nasopharyngeal carcinoma in a non-endemic region? A prospective nationwide study of the Dutch Head and Neck Oncology Cooperative Group

Author

MS Hoofd-Hals Chirurgische Oncologie, Cancer, MS KNO, Other research (not in main researchprogram), Stoker, Sharon D., Wildeman, Maarten A., Novalic, Zlata, Fles, Renske, van der Noort, Vincent, de Bree, Remco, Braunius, Weibel W., van den Broek, Guido B., Kreike, Bas, Kross, Kenneth W., Juwana, Hedy, Ramayanti, Octavia, Verkuijlen, Sandra A. W. M., de Boer, Jan Paul, Greijer, Astrid E., Middeldorp, Jaap M., Tan, I. Bing, MS Hoofd-Hals Chirurgische Oncologie, Cancer, MS KNO, Other research (not in main researchprogram), Stoker, Sharon D., Wildeman, Maarten A., Novalic, Zlata, Fles, Renske, van der Noort, Vincent, de Bree, Remco, Braunius, Weibel W., van den Broek, Guido B., Kreike, Bas, Kross, Kenneth W., Juwana, Hedy, Ramayanti, Octavia, Verkuijlen, Sandra A. W. M., de Boer, Jan Paul, Greijer, Astrid E., Middeldorp, Jaap M., and Tan, I. Bing

Published
2016

18. Effectiveness of a multicentre nasopharyngeal carcinoma awareness programme in Indonesia

Author

Fles, Renske, primary, Indrasari, Sagung R, additional, Herdini, Camelia, additional, Martini, Santi, additional, Isfandiari, Atoillah, additional, Romdhoni, Achmad C, additional, Adham, Marlinda, additional, Mayangsari, Ika D, additional, van Werkhoven, Erik, additional, Wildeman, Maarten A, additional, Hariwiyanto, Bambang, additional, Hermani, Bambang, additional, Kentjono, Widodo A, additional, Haryana, Sofia M, additional, Schmidt, Marjanka K, additional, and Tan, I Bing, additional

Published
2016
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19. Can Epstein-Barr virus DNA load in nasopharyngeal brushings or whole blood predict recurrent nasopharyngeal carcinoma in a non-endemic region? A prospective nationwide study of the Dutch Head and Neck Oncology Cooperative Group

Author

Stoker, Sharon D., primary, Wildeman, Maarten A., additional, Novalic, Zlata, additional, Fles, Renske, additional, van der Noort, Vincent, additional, de Bree, Remco, additional, Braunius, Weibel W., additional, van den Broek, Guido B., additional, Kreike, Bas, additional, Kross, Kenneth W., additional, Juwana, Hedy, additional, Ramayanti, Octavia, additional, Verkuijlen, Sandra A. W. M., additional, de Boer, Jan Paul, additional, Greijer, Astrid E., additional, Middeldorp, Jaap M., additional, and Tan, I. Bing, additional

Published
2015
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20. Treatment-seeking behaviour of nasopharyngeal cancer patients in Yogyakarta, Indonesia.

Author

Waliyanti, Ema, Dewi, Fatwa Sari Tetra, Supriyati, Supriyati, and Fles, Renske

Subjects
NASOPHARYNX cancer patients, CANCER treatment, GROUNDED theory
Abstract

Introduction: Nasopharyngeal cancer ranks first among head and neck cancer. About 60-95% of nasopharyngeal cancer patients seek for treatment at advanced stage. Attitudes and behavior of cancer patients in choosing healthcare is affected by the level of socio-economic and cultural backgrounds. Surgery and treatment costs are also the reasons patients to late seek treatment. This study aims to explore what contributes the treatment seeking behavior of nasopharyngeal cancer patients. It conducted in the Yogyakarta, Indonesia. Methods: As many as 20 patients were interviewed using questionnaire. All interviews were done using Opencode 3.6. To ensure the data validity, triangulation approach, peer debriefing and thick description were done. Results: it showed that there are five factors that affect the patients in seeking treatment: disease perception, medical services perception, medical expenses, external support and assessment of treatment process. Conclusion: This study may help to design health education programs to raise public awareness of nasopharyngeal cancer. [ABSTRACT FROM AUTHOR]

Published
2018
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21. Current Status of Cancer Care for Young Patients with Nasopharyngeal Carcinoma in Jakarta, Indonesia

Author

Adham, Marlinda, primary, Stoker, Sharon D., additional, Wildeman, Maarten A., additional, Rachmadi, Lisnawati, additional, Gondhowiardjo, Soehartati, additional, Atmakusumah, Djumhana, additional, Gatot, Djayadiman, additional, Fles, Renske, additional, Greijer, Astrid E., additional, Hermani, Bambang, additional, Middeldorp, Jaap M., additional, and Tan, I. Bing, additional

Published
2014
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22. PKA-induced phosphorylation of ER alpha at serine 305 and high PAK1 levels is associated with sensitivity to tamoxifen in ER-positive breast cancer

Author

Kok, Marleen, Zwart, Wilbert, Holm, Caroline, Fles, Renske, Hauptmann, Michael, Vant Veer, LauraJ., Wessels, Lodewyk F. A., Neefjes, Jacques, Stål, Olle, Linn, Sabine C., Landberg, Goran, Michalides, Rob, Kok, Marleen, Zwart, Wilbert, Holm, Caroline, Fles, Renske, Hauptmann, Michael, Vant Veer, LauraJ., Wessels, Lodewyk F. A., Neefjes, Jacques, Stål, Olle, Linn, Sabine C., Landberg, Goran, and Michalides, Rob

Abstract

Phosphorylation of estrogen receptor alpha at serine 305 (ER alpha S305-P) by protein kinase A (PKA) or p21-activated kinase 1 (PAK1) has experimentally been associated with tamoxifen sensitivity. Here, we investigated the clinical application of this knowledge to predict tamoxifen resistance in ER-positive breast cancer patients. Using immunohistochemistry, a score including PAK1 and co-expression of PKA and ER alpha S305-P (PKA/ER alpha S305-P) was developed on a training set consisting of 103 patients treated with tamoxifen for metastatic disease, and validated on 231 patients randomized between adjuvant tamoxifen or no treatment. In the training set, PAK1 levels were associated with tumor progression after tamoxifen (HR 1.57, 95% CI 0.99-2.48), as was co-expression of PKA and ER alpha S305-P (HR 2.00, 95% CI 1.14-3.52). In the validation set, a significant tamoxifen benefit was found among the 73% patients negative for PAK1 and PKA/ER alpha S305-P (HR 0.54, 95% CI 0.34-0.87), while others (27%) were likely to have no benefit from tamoxifen (HR 0.88, 95% 0.42-1.82). The test for interaction showed a significant difference in recurrence-free survival between groups defined by PAK1 and PKA/ER alpha S305-P (P = 0.037). Elevated PAK1 and PKA/ER alpha S305-P appeared to influence tamoxifen sensitivity. Both PAK1 and PKA/ER alpha S305-P levels were associated with sensitivity to tamoxifen in breast tumors and the combination of these variables should be considered in predicting tamoxifen benefit.

Published
2011
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24. Primary Treatment Results of Nasopharyngeal Carcinoma (NPC) in Yogyakarta, Indonesia

Author

Wildeman, Maarten A., primary, Fles, Renske, additional, Herdini, Camelia, additional, Indrasari, Rai S., additional, Vincent, Andrew D., additional, Tjokronagoro, Maesadji, additional, Stoker, Sharon, additional, Kurnianda, Johan, additional, Karakullukcu, Baris, additional, Taroeno-Hariadi, Kartika W., additional, Hamming-Vrieze, Olga, additional, Middeldorp, Jaap M., additional, Hariwiyanto, Bambang, additional, Haryana, Sofia M., additional, and Tan, I. Bing, additional

Published
2013
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27. PKA-induced phosphorylation of ERα at serine 305 and high PAK1 levels is associated with sensitivity to tamoxifen in ER-positive breast cancer

Author

Kok, Marleen, primary, Zwart, Wilbert, additional, Holm, Caroline, additional, Fles, Renske, additional, Hauptmann, Michael, additional, Van’t Veer, Laura J., additional, Wessels, Lodewyk F. A., additional, Neefjes, Jacques, additional, Stål, Olle, additional, Linn, Sabine C., additional, Landberg, Göran, additional, and Michalides, Rob, additional

Published
2010
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31. Short-Term Effect of Different Teaching Methods on Nasopharyngeal Carcinoma for General Practitioners in Jakarta, Indonesia.

Author

Wildeman, Maarten A., Fles, Renske, Adham, Marlinda, Mayangsari, Ika D., Luirink, Ilse, Sandberg, Mara, Vincent, Andrew D., Fardizza, Faiziah, Musa, Zanil, Armiyanto, Middeldorp, Jaap M., Gerritsen, Geerten, Suwanto, Ronny, and Tan, I. Bing

Subjects
*HEAD & neck cancer, *QUESTIONNAIRES, *TEACHING methods
Abstract

In Indonesia, Nasopharyngeal Carcinoma (NPC) is the most frequent cancer of the head and neck region. At first presentation in the hospital most patients already have advanced NPC. Our previous study showed that general practitioners (GPs) working in Yogyakarta, Indonesia lack the knowledge necessary for early detection of NPC. By providing training on early symptoms of NPC we hope that the diagnosis and referral will occur at an earlier stage. Here we assess the current NPC knowledge levels of GPs in Jakarta, evaluate improvement after training, compare the effectiveness of two training formats, and estimate the loss of recall over a two week period.Methods: Two Indonesian GPs visited 31 Primary Health Care Centres (PHCCs) and provided a lecture on NPC. The alternative format consisted of a symposium at the Universitas Indonesia, Jakarta, presented by local head and neck surgeons, with all GPs in the region being invited. To evaluate the effect of both formats a questionnaire was conducted before and after. Results: The lecture in the PHCCs was attended by 130 GPs. Sixty-six GPs attended the training in the university hospital and 40 GPs attended both. Pre training the NPC knowledge level was poor with an average of 1.6 symptoms being correctly identified out of a potential maximum of 12, this was increased to 4.9 post training (p,0.0001). GPs attending the PHCC course recorded a greater increase in correct symptoms than those attending the symposium (3.8 vs. 2.8; p = 0.01). After a two week period the knowledge levels had declined slightly from 5.5 correctly identified symptoms to 4.2 (p = 0.25). Conclusion: These results confirm our findings regarding GPs insufficient knowledge of NPC. Lectures in the PHCC and a symposium have both been proven to be effective training tools in the education of GPs. [ABSTRACT FROM AUTHOR]

Published
2012
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32. Mammosphere-derived gene set predicts outcome in patients with ER-positive breast cancer.

Author

Kok, Marleen, Koornstra, Rutger H, Margarido, Tania C, Fles, Renske, Armstrong, Nicola J, Linn, Sabine C, Van't Veer, Laura J, and Weigelt, Britta

Abstract

Tumourigenic subpopulations with stem cell-like features have been identified in breast tumours and breast cancer cell lines. The hormone receptor status, molecular characteristics and clinical significance of these cells are still matters of debate. Enrichment for tumourigenic cells without the requirement of surface markers can be achieved by the in vitro mammosphere culture assay. Here we compared the hormone receptor status and genome-wide gene expression profiles of mammospheres derived from four oestrogen-receptor (ER) positive breast cancer cell lines with those of the respective parental cells. Immunohistochemistry and gene expression profiling revealed a significant reduction in the expression of progesterone receptor, proliferation and cell cycle regulated genes in mammospheres when compared to parental cell lines. The 200 most differentially expressed genes between mammospheres and parental cell lines were used to generate a 'mammosphere-derived' gene set. Hierarchical clustering of gene expression profiles of two independent cohorts of primary ER-positive cancers based on the 'mammosphere-derived' gene set revealed that the subgroup of breast cancers with profiles similar to those of mammospheres has a significantly longer overall survival. In conclusion, tumour-initiating breast cancer cells grown in mammospheres seem to reside in a quiescent state. ER-positive breast cancers with expression profiles similar to those of mammospheres have a better outcome, providing evidence in support of the concept that outcome of patients with ER-positive disease is for a large part determined by cell cycle and proliferation activity. Copyright © 2008 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Published
2009
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