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https://www.readbyqxmd.com/read/29028887/identification-of-cancer-driver-genes-in-focal-genomic-aberrations-from-whole-exome-sequencing-data
#1
Ho Jang, Hyunju Lee
Summary: Whole-exome sequencing (WES) data have been used for identifying copy number aberrations in cancer cells. Nonetheless, the use of WES is still challenging for identification of focal aberrant regions in multiple samples that may contain cancer driver genes. In this study, we developed a wavelet-based method for identifying focal genomic aberrant regions in the WES data from cancer cells (WIFA-X). When we applied WIFA-X to glioblastoma multiforme and lung adenocarcinoma datasets, WIFA-X outperformed other approaches on identifying cancer driver genes...
September 28, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28991465/inhibitors-to-overcome-secondary-mutations-in-the-stem-cell-factor-receptor-kit
#2
Helena Kaitsiotou, Marina Keul, Julia Hardick, Thomas Mühlenberg, Julia Ketzer, Christiane Ehrt, Jasmin Krüll, Federico Medda, Oliver Koch, Fabrizio Giordanetto, Sebastian Bauer, Daniel Rauh
In modern cancer therapy, the use of small organic molecules against receptor tyrosine kinases (RTKs) has been shown to be a valuable strategy. The association of cancer cells with dysregulated signaling pathways linked to RTKs represents a key element in targeted cancer therapies. The tyrosine kinase mast/stem cell growth factor receptor KIT is an example of a clinically relevant RTK. KIT is targeted for cancer therapy in gastrointestinal stromal tumors (GISTs) and chronic myelogenous leukemia (CML). However, acquired resistance mutations within the catalytic domain decrease the efficacy of this therapy and are the most common cause of failed therapy...
October 9, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28990511/sunitinib-in-the-treatment-of-thyroid-cancer
#3
Ferrari Silvia Martinaa, Centanni Marco, Virili Camilla, Miccoli Mario, Ferrari Paola, Ruffilli Ilaria, Ragusa Francesca, Antonelli Alessandro, Fallahi Poupak
BACKGROUND: Sunitinib (SU11248) is an oral, small-molecule, multi-targeted tyrosine kinase inhibitor (TKI), that inhibits receptors for platelet-derived growth factor (PDGF-Rs) and vascular endothelial growth factor receptors (VEGFRs), c-KIT, fms-related tyrosine kinase 3 (FLT3) and RET. The concurrent inhibition of these pathways reduces tumor vascularization and causes cancer cell apoptosis, inducing a tumor shrinkage. Sunitinib is approved for the treatment of imatinib-resistant gastrointestinal stromal tumor (GIST), renal carcinoma, and pancreatic neuroendocrine tumors...
October 6, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28988888/small-bowel-tumors-a-digestive-endoscopy-society-of-taiwan-dest-multicenter-enteroscopy-based-epidemiologic-study
#4
Chen-Shuan Chung, Chi-Ming Tai, Tien-Yu Huang, Chen-Wang Chang, Kuan-Chih Chen, Chao-Ming Tseng, Horng-Yuan Wang, Cheng-Hsin Chu, Jiann-Ming Wu, Yun Chen, Hsiu-Po Wang
BACKGROUND/PURPOSE: Small bowel (SB) accounts for the majority of gastrointestinal tract but its tumors are rare and always overlooked. In this study, we aimed to evaluate the epidemiology of SB tumors. METHODS: This multicenter retrospective study utilized endoscopy database from 2006/11 to 2016/07. Baseline demographic characteristics, clinical, radiologic and endoscopic findings were collected. RESULTS: Totally 103 (34 benign, 69 malignant lesions) patients with SB tumors in 1070 enteroscopic examinations were enrolled...
October 5, 2017: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/28976120/tumor-molecular-profiling-in-the-treatment-of-refractory-cancers-%C3%A2
#5
Birendra Kc, Muhammad Zubair Afzal, Andrew Sochaki, Katherine A Wentland, Rubens Chang, Sudhir Singh, Timothy O'Rourke
INTRODUCTION: Molecular profiling (MP) has been used as a technique to identify treatment regimens for individual patient's cancer. The results of MP has been used to guide targeted therapy specific to each patient's tumor that resulted in a longer progression free survival (PFS) compared to the last conventional treatment. This study aims to provide further data to delineate the PFS of patients who get treated with targeted therapy based on MP. METHODS: A retrospective chart review was performed...
September 2017: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/28975120/metastatic-gastrointestinal-stromal-tumor-a-regional-cancer-center-experience-of-44-cases
#6
M C Suresh Babu, Tamojit Chaudhuri, K Govind Babu, K C Lakshmaiah, D Lokanatha, Linu Abraham Jacob, A H Rudresha, K N Lokesh, L K Rajeev
BACKGROUND: Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasms of the gastrointestinal tract. Historically, a poor prognosis for metastatic disease has been reported with systemic chemotherapy. Significant advances have been made in the last decade, since the introduction of different tyrosine kinase inhibitors (TKIs). Unfortunately, even though the TKIs have been used for a long time, there are very few published data of the experience of TKI therapy in metastatic GIST from India...
July 2017: South Asian Journal of Cancer
https://www.readbyqxmd.com/read/28975118/unraveling-the-spectrum-of-kit-mutations-in-gastrointestinal-stromal-tumors-an-indian-tertiary-cancer-center-experience
#7
Trupti Pai, Munita Bal, Omshree Shetty, Mamta Gurav, Vikas Ostwal, Anant Ramaswamy, Mukta Ramadwar, Sangeeta Desai
BACKGROUND: Primary mutations in the KIT gene are the driving force for gastrointestinal stromal tumors (GIST) tumorigenesis. Predictive role of KIT mutation status aids oncologists in patient management. There is a paucity of comprehensive data on the frequency of mutations in the KIT gene in GIST affecting Indian patients. The aims of this study were to determine the frequency and spectrum of molecular alterations affecting the KIT gene and assess their association with clinicopathologic features in a cohort of patients of GIST...
July 2017: South Asian Journal of Cancer
https://www.readbyqxmd.com/read/28951716/a-first-case-report-of-rare-synchronous-double-cancers-malignant-cutaneous-melanoma-and-gastrointestinal-stromal-tumor
#8
Barbara Zegarska, Maciej Nowacki, Katarzyna Pietkun, Wojciech Jozwicki, Tomasz Nowikiewicz, Noor Y Al-Obaidi, Samy L Habib, Wojciech Zegarski
No abstract text is available yet for this article.
August 2017: Postȩpy Dermatologii i Alergologii
https://www.readbyqxmd.com/read/28940884/involvement-of-pdgf-ligands-and-receptors-in-tumorigenesis
#9
REVIEW
Carl-Henrik Heldin, Johan Lennartsson, Bengt Westermark
Platelet-derived growth factor (PDGF) isoforms and their receptors have important roles during embryogenesis, particularly in the development of various mesenchymal cell types in different organs. In the adult, PDGF stimulates wound healing and regulates tissue homeostasis. However, over-activity of PDGF signaling is associated with malignancies and other diseases characterized by excessive cell proliferation, such as fibrotic conditions and atherosclerosis. In certain tumors, genetic or epigenetic alterations of the genes for PDGF ligands and receptors drives tumor cell proliferation and survival...
September 22, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28931294/-carney-triad
#10
L Fiala, I Kocáková, R Šimůnek, E Krejčí, I Babánková, R Šefr
Carney triad is a synchronous or metachronous association of gastric gastrointestinal stromal tumors (GIST), pulmonary chondroma and extra-adrenal paraganglioma. The majority of patients have only one or two components of the triad, all three tumors being found in only about 2% of the patients at the time of the first diagnosis. The most common combination is gastric and pulmonary tumors. We report a case of Carney triad which was diagnosed at Masaryk Memorial Cancer Institute. A 57-year-old female patient with a history of gastric resection for leiomyosarcoma at the age of 14 and with an unclear pulmonary lesion evident on chest X-ray since as early as 2003...
2017: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/28931291/-malignant-tumors-of-the-small-bowel
#11
L Němec, P Fabian, J Tomášek, J Jarkovský, R Šefr, L Fiala
INTRODUCTION: Malignant tumors of the small bowel are relatively uncommon neoplasms; their incidence is around 1.5 per 100,000 inhabitants in the Czech Republic. METHOD: 104 patients underwent a resection of the small bowel because of a primary or secondary tumor over the 10-year period between 20062015 at the Masaryk Memorial Cancer Institute. Data from these patients was reviewed retrospectively. Survival rates were analyzed using the Kaplan-Meier method. RESULTS: We observed 45 primary and 59 secondary tumors...
2017: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/28928967/recent-advances-in-managing-gastrointestinal-stromal-tumor
#12
REVIEW
Florence Duffaud, Axel Le Cesne
Constitutive activating mutations in KIT and platelet-derived growth factor receptor α ( PDGFRα) are heavily involved in the pathobiology of gastrointestinal stromal tumors (GISTs). This disease has served as an effective "proof-of-concept" model for targeting gain-of-function kinase mutations in cancer. This review discusses the current standard of care in terms of pharmacotherapy in the management of localized and metastatic GISTs.
2017: F1000Research
https://www.readbyqxmd.com/read/28918799/new-imaging-techniques-for-endoscopic-ultrasonography-contrast-enhanced-endoscopic-ultrasonography
#13
REVIEW
Masayuki Kitano, Yasunobu Yamashita
Conventional endoscopic ultrasonography (EUS) has limitations in the diagnosis of solid masses. Because most are depicted as a hypoechoic mass, without cytology or biopsy, it can be difficult to distinguish inflammatory masses from malignancy. Recently developed, contrast-enhanced harmonic EUS (CH-EUS) has improved characterization of digestive lesions by depicting microvessels and parenchymal perfusion, particularly for differentiating pancreatic cancer from other pancreatic solid lesions, identifying mural nodules in intraductal papillary mucinous neoplasms, and estimating malignant potential of gastrointestinal stromal tumors...
October 2017: Gastrointestinal Endoscopy Clinics of North America
https://www.readbyqxmd.com/read/28904693/-gastrointestinal-stromal-tumors-gist-status-and-news-through-our-experience-on-54-cases-and-review-of-literature
#14
REVIEW
Nezha Taoufiq, Asmaa Naim, Zineb Bouchbika, Nadia Benchekroune, Hassan Jouhadi, Souha Sahraoui, Abdelatif Benider
Tumors Gastrointestinal Stromal "GIST" are a very rare form of digestive tract cancers belonging to the family of sarcomas. The aim of this study is to establish the epidemiological profile, the diagnostic and therapeutic difficulties of this malignancy supported in a developing country. A retrospective study spread over 8 years from January 2002 to March 2010, was conducted at the Department of Radiotherapy and Oncology of Casablanca (Morocco) have collated 54 cases of Gastrointestinal Stromal tumors. The average age of our patients was 55 years...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28900995/-association-between-genetic-polymorphisms-and-variation-of-imatinib-pharmacokinetics-in-gastrointestinal-stromal-tumors
#15
Haibo Qiu, Wei Zhuang, Xueding Wang, Min Huang, Zhiwei Zhou
OBJECTIVE: To investigate the influence of metabolic enzymes polymorphisms on variations of imatinib (IM) pharmacokinetics in gastrointestinal stromal tumors (GIST) patients. METHODS: Clinical data of 118 Chinese GIST patients receiving 400 mg/d IM at Sun Yat-sen University Cancer Center between 2014 and 2016 were retrospectively analyzed. The plasma concentration of imatinib mesylate(IM) and its main metabolic N-demethyl imatinib (NDI) were determined by LC-MS/MS...
September 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28900993/-comparison-of-modified-nih-and-afip-risk-stratification-criteria-for-gastrointestinal-stromal-tumors-a-multicenter-retrospective-study
#16
Tao Chen, Haibo Qiou, Xingyu Feng, Peng Zhang, Liangying Ye, Yanfeng Hu, Hao Liu, Jiang Yu, Kaixiong Tao, Yong Li, Zhiwei Zhou, Guoxin Li
OBJECTIVE: To evaluate and compare the value of Modified NIH criteria and AFIP criteria for the risk classification of gastrointestinal stromal tumors (GIST). METHODS: Clinicopathological and follow-up data of 539 patients diagnosed as primary GIST with or without irregular tyrosine kinase inhibitors in the Nanfang Hospital(n=143), Sun Yat-sen University Cancer Center (n=138), Guangdong Provincial People's Hospital (n=102) and Wuhan Union Hospital (n=156) from January 2012 to December 2015 were retrospectively analyzed...
September 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28889157/epidemiologic-characteristics-of-gastric-malignancies-among-jordan-university-hospital-patients
#17
Heyam A Awad, Manar H Hajeer, Mohand W Abulihya, Mohammad A Al-Chalabi, Ali A Al Khader
To discover the epidemiologic distribution of gastric malignancies among Jordan University Hospital patients and to compare this distribution with the neighboring Arab countries. Methods: Retrospective study covering the period between  January 2006, and May 2016, in Jordan University Hospital, Amman, Jordan. All cases were retrieved from the computer system and analyzed using IBM SPSS version 23 software.  Results: One hundred and sixty-five cases were analyzed. Male-to-female ratio was 1.2:1. The mean age was 58...
September 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28870911/sunitinib-inhibits-breast-cancer-cell-proliferation-by-inducing-apoptosis-cell-cycle-arrest-and-dna-repair-while-inhibiting-nf-%C3%AE%C2%BAb-signaling-pathways
#18
Hesham M Korashy, Zaid H Maayah, Fawaz E Al Anazi, Abdulaziz M Alsaad, Ibrahim O Alanazi, Osamah M Belali, Fahad O Al-Atawi, Aws Alshamsan
The tyrosine kinase inhibitor sunitinib was recently approved for use against gastrointestinal stromal tumors and advanced renal cell carcinoma. Yet, the protective effect of sunitinib against breast cancer has been poorly investigated. In this study, we investigated the antiproliferative and apoptogenic effects of sunitinib and the possible mechanism involved against the MCF7 human breast cancer cell line. Treatment of MCF7 cells with sunitinib caused concentration-dependent cell growth suppression due to apoptosis...
September 2017: Anticancer Research
https://www.readbyqxmd.com/read/28860410/next-generation-sequencing-for-patients-with-sarcoma-a-single-center-experience
#19
Gregory M Cote, Jie He, Edwin Choy
BACKGROUND: Sarcomas comprise over 50 subtypes of mesenchymal cancers. For the majority of sarcomas, the driver mutations remain unknown. In this article, we describe our experience with a targeted next-generation sequencing (NGS) platform in clinic patients. MATERIALS AND METHODS: We retrospectively analyzed results of NGS using 133 tumor samples from patients diagnosed with a variety of sarcomas that were analyzed with targeted NGS covering over 400 cancer-related genes (405 DNA, 265 RNA) on a commercially available platform...
August 31, 2017: Oncologist
https://www.readbyqxmd.com/read/28845017/organ-preserving-surgery-for-locally-advanced-duodenal-gastrointestinal-stromal-tumor-after-neoadjuvant-treatment
#20
Ang Lv, Honggang Qian, Hui Qiu, Jianhui Wu, Ying Li, Zhongwu Li, Chunyi Hao
This report aims to investigate the feasibility and outcomes of neoadjuvant imatinib mesylate (IM) administration followed by organ-preserving surgery (OPS) for patients with locally advanced duodenal gastrointestinal stromal tumor (GIST). Between 2012 and 2015, 10 consecutive patients with locally advanced duodenal GISTs were treated in Peking University Cancer Hospital. Multidisciplinary assessment was implemented, and pancreaticoduodenectomy (PD) was initially indicated as the most probable surgical procedure for all 10 patients...
August 28, 2017: Bioscience Trends
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