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https://www.readbyqxmd.com/read/29143776/gastric-cancer-cell-glycosylation-as-a-modulator-of-the-erbb2-oncogenic-receptor
#1
Henrique O Duarte, Meritxell Balmaña, Stefan Mereiter, Hugo Osório, Joana Gomes, Celso A Reis
Aberrant expression and hyperactivation of the human epidermal growth factor receptor 2 (ErbB2) constitute crucial molecular events underpinning gastric neoplastic transformation. Despite ErbB2 extracellular domain being a well-known target for glycosylation, its glycosylation profile and the molecular mechanisms through which it actively tunes tumorigenesis in gastric cancer (GC) cells remain elusive. We aimed at disclosing relevant ErbB2 glycan signatures and their functional impact on receptor's biology in GC cells...
October 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29137021/effect-of-antitumor-treatments-on-triple-negative-breast-cancer-patients-a-prisma-compliant-network-meta-analysis-of-randomized-controlled-trials
#2
Qiuhong Tian, Peng Du, Sen Li, Zhenzhu Bai, Yong Yang, Jinsheng Zeng
BACKGROUND: Triple-negative breast cancer (TNBC) lacks the expression of the estrogen receptor, progesterone receptor, and receptor tyrosine-protein kinase erbB-2 (HER2/neu), which renders hormone-related endocrine and targeted therapy essentially futile. OBJECTIVE: We performed a meta-analysis to assess the effects of antitumor regimens in the treatment of TNBC patients. METHODS: We searched electronic databases, including PubMed, Embase, and the Cochrane Library, through January 2017 using the following keywords: "triple negative breast cancer," "TNBC," and "random*" without language restrictions...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29131383/rational-optimization-of-tumor-suppressor-derived-peptide-inhibitor-selectivity-between-oncogene-tyrosine-kinases-erbb1-and-erbb2
#3
Yilin Deng, Jian Li
The tumor-suppressor protein Mig-6 has been found to directly target and inhibit the human ErbB receptor tyrosine kinases ErbB1 and ErbB2. Despite their highly homologous nature, these two kinases are separately involved in the development of different types of human cancer. Here, we utilized a rational strategy to iteratively optimize the interaction specificity of the two kinases with a Mig-6 derived peptide by exploiting structural diversity space. Instead of traditionally improving the peptide binding potency, the optimization attempts to maximize the affinity difference between peptides binding to ErbB1 and ErbB2...
November 13, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/29126017/epidermal-growth-factor-receptor-overexpression-and-outcomes-in-early-breast-cancer-a-systematic-review-and-a-meta-analysis
#4
REVIEW
Galileo A Gonzalez-Conchas, Laura Rodriguez-Romo, David Hernandez-Barajas, Juan F Gonzalez-Guerrero, Ivan A Rodriguez-Fernandez, Adrian Verdines-Perez, Arnoud J Templeton, Alberto Ocana, Bostjan Seruga, Ian F Tannock, Eitan Amir, Francisco E Vera-Badillo
BACKGROUND: The epidermal growth factor receptor (EGFR) is a member of the ErbB family of membrane tyrosine-kinase receptors. Studies exploring the prognostic role of EGFR-overexpression in early breast cancer have shown variable results, and the true prognostic value of EGFR is unknown. METHODS: A systematic review of identified publications exploring the association between EGFR-overexpression (as defined from different techniques and cut-offs) and outcomes [disease-free (DFS) and, overall survival (OS)] in women with early breast cancer...
October 31, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/29123418/evaluating-the-cost-effectiveness-of-afatinib-after-platinum-based-therapy-for-the-treatment-of-squamous-non-small-cell-lung-cancer-in-france
#5
Maud Pignata, Christos Chouaid, Katell Le Lay, Laura Luciani, Ceilidh McConnachie, James Gordon, Stéphane Roze
Background and aims: Lung cancer has the highest mortality rate of all cancers worldwide. Non-small-cell lung cancer (NSCLC) accounts for 85% of all lung cancers and has an extremely poor prognosis. Afatinib is an irreversible ErbB family blocker designed to suppress cellular signaling and inhibit cellular growth and is approved in Europe after platinum-based therapy for squamous NSCLC. The objective of the present analysis was to evaluate the cost-effectiveness of afatinib after platinum-based therapy for squamous NSCLC in France...
2017: ClinicoEconomics and Outcomes Research: CEOR
https://www.readbyqxmd.com/read/29113229/fatty-acid-synthase-affects-expression-of-erbb-receptors-in-epithelial-to-mesenchymal-transition-of-breast-cancer-cells-and-invasive-ductal-carcinoma
#6
Tingting Chen, Lan Zhou, Hua Li, Yuan Tian, Junqin Li, Lihua Dong, Yuhua Zhao, Dapeng Wei
The aim of the present study was to investigate changes in the expression of ErbBs during epithelial-mesenchymal transition (EMT) of breast cancer cells and its association with the expression of fatty acid synthase (FASN). MCF-7-MEK5 cells were used as the experimental model, while MCF-7 cells were used as a control. Tumor cells were implanted into nude mice for in vivo analysis. Cerulenin was used as a FASN inhibitor. Reverse transcription-polymerase chain reaction and western blot analysis were used to detect expression levels of FASN and ErbB1-4...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29089539/heterogeneous-circrna-expression-profiles-and-regulatory-functions-among-hek293t-single-cells
#7
Chaofang Zhong, Shaojun Yu, Maozhen Han, Jiahuan Chen, Kang Ning
The single-cell analysis is becoming a powerful method for early detection of the abnormal variant in tissues, especially for profiling a small number of heterogeneous cells. With the advancement of sequencing technologies, many types of non-coding elements including miRNAs and lncRNAs which shed light on their heterogeneous patterns and functions among cells, have been profiled at the single-cell level. However, the complete picture of circRNA profile at single-cell level is still lacking. In this study, RNA-Seq data obtained from single HEK293T cells have been used to analyze expressions and functions of heterogeneous circRNA profiles...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29076521/btg1-low-expression-in-pancreatic-ductal-adenocarcinoma-is-associated-with-a-poorer-prognosis
#8
Yufang Huang, Jiawei Zheng, Ting Tan, Li Song, Shanshan Huang, Yan Zhang, Lin Lin, Jingnan Liu, Peichan Zheng, Xiong Chen, Xi Chen, Xuenong Ouyang
OBJECTIVE: BTG1 is a member of the TOB/BTG protein family, which is a transducer of ErbB-2 and TOB2. It is known to inhibit tumor genesis, but its role in pancreatic ductal adenocarcinoma (PDAC) is still unknown. The purpose of this study is to investigate the expression of BTG1 protein in PDAC and to determine its prognostic significance. METHODS: Immunohistochemistry is used to determine the protein expression of the BTG1 gene in 79 surgically resected PDAC. The association of BTG1 expression with all the patients' clinicopathologic parameters, including survival, was analyzed using statistical software...
October 25, 2017: International Journal of Biological Markers
https://www.readbyqxmd.com/read/29059433/an-erbb1-3-neutralizing-antibody-mixture-with-high-activity-against-drug-resistant-her2-breast-cancers-with-erbb-ligand-overexpression
#9
Luis J Schwarz, Katherine E Hutchinson, Brent N Rexer, Mónica Valeria Estrada, Paula I Gonzalez Ericsson, Melinda E Sanders, Teresa C Dugger, Luigi Formisano, Angel Guerrero-Zotano, Monica Red-Brewer, Christian D Young, Johan Lantto, Mikkel W Pedersen, Michael Kragh, Ivan D Horak, Carlos L Arteaga
Background: Plasticity of the ERBB receptor network has been suggested to cause acquired resistance to anti-human epidermal growth factor receptor 2 (HER2) therapies. Thus, we studied whether a novel approach using an ERBB1-3-neutralizing antibody mixture can block these compensatory mechanisms of resistance. Methods: HER2+ cell lines and xenografts (n ≥ 6 mice per group) were treated with the ERBB1-3 antibody mixture Pan-HER, trastuzumab/lapatinib (TL), trastuzumab/pertuzumab (TP), or T-DM1...
November 1, 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29050225/hcarg-commd5-inhibits-erbb-receptor-driven-renal-cell-carcinoma
#10
Hiroyuki Matsuda, Carole G Campion, Kyoko Fujiwara, Jin Ikeda, Suzanne Cossette, Thomas Verissimo, Maiko Ogasawara, Louis Gaboury, Kosuke Saito, Kenya Yamaguchi, Satoru Takahashi, Morito Endo, Noboru Fukuda, Masayoshi Soma, Pavel Hamet, Johanne Tremblay
Hypertension-related, calcium-regulated gene (HCaRG/COMMD5) is highly expressed in renal proximal tubules, where it contributes to the control of cell proliferation and differentiation. HCaRG accelerates tubular repair by facilitating re-differentiation of injured proximal tubular epithelial cells, thus improving mouse survival after acute kidney injury. Sustained hyper-proliferation and de-differentiation are important hallmarks of tumor progression. Here, we demonstrate that cancer cells overexpressing HCaRG maintain a more differentiated phenotype, while several of them undergo autophagic cell death...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29043992/correlation-of-the-ultrasound-imaging-of-breast-cancer-and-the-expression-of-molecular-biological-indexes
#11
Jie Xu, Feng Li, Fengling Chang
This paper aims to 137 cases of breast malignant tumors confirmed by surgery and pathology were collected. All patients received ultrasound examination and were not treated by radiotherapy or chemotherapy before operation. The preoperative ultrasound images of breast cancer patients and postoperative pathological characteristics of paraffin sections were retrospectively observed. Ultrasound indicators included tumor size, shape, ratio of the longest/shortest dimension, edge of the spiculation and peripheral hyperechoic halo sign, internal echo types, micro calcification, posterior echo types, blood flow and signs of lymph node metastasis...
July 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29032615/regulation-of-the-prometastatic-neuregulin-mmp13-axis-by-src-family-kinases-therapeutic-implications
#12
Ana Orive-Ramos, Samuel Seoane, Alberto Ocaña, Atanasio Pandiella, Juan Carlos Montero
Metastatic dissemination of tumor cells is responsible for the fatal outcome of breast cancer. Therefore, understanding the mechanisms involved in dissemination is essential for the development of new therapeutic strategies to prevent metastasis. One mechanism involved in metastatic dissemination of breast cancer cells is dependent on control of the production of matrix metalloproteinases by the neuregulins (NRGs). The NRGs are polypeptide factors that act by binding to the ErbB/HER subfamily of receptor tyrosine kinases...
October 15, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/29030491/autophagy-is-activated-in-the-ovarian-tissue-of-polycystic-ovary-syndrome
#13
Da Li, Yue You, Fang-Fang Bi, Tie-Ning Zhang, Jiao Jiao, Tian-Ren Wang, Yi-Ming Zhou, Zi-Qi Shen, Xiu-Xia Wang, Qing Yang
The importance of autophagy in polycystic ovary syndrome (PCOS)-related metabolic disorders is increasingly being recognized, but few studies have investigated the role of autophagy in PCOS. Here, transmission electron microscopy demonstrated that autophagy was enhanced in the ovarian tissue from both humans and rats with PCOS. Consistent with this, ovarian granulosa cells from PCOS rats showed increases in the autophagy marker protein light chain 3B (LC3B), whereas levels of the autophagy substrate SQSTM1/p62 were decreased...
October 13, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29028318/combination-of-c%C3%AE-h-hydrogen-bonds-and-van-der-waals-packing-modulates-the-stability-of-gxxxg-mediated-dimers-in-membranes
#14
Samantha M Anderson, Benjamin K Mueller, Evan J Lange, Alessandro Senes
The GxxxG motif is frequently found at the dimerization interface of a transmembrane structural motif called GASright, which is characterized by a short interhelical distance and a right-handed crossing angle between the helices. In GASright dimers, such as glycophorin A (GpA), BNIP3, and members of the ErbB family, the backbones of the helices are in contact, and they invariably display networks of 4 to 8 weak hydrogen bonds between Cα-H carbon donors and carbonyl acceptors on opposing helices (Cα-H···O═C hydrogen bonds)...
October 27, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29028222/role-of-rbp2-induced-er-and-igf1r-erbb-signaling-in-tamoxifen-resistance-in-breast-cancer
#15
Hee-Joo Choi, Hyeong-Seok Joo, Hee-Young Won, Kyueng-Whan Min, Hyung-Yong Kim, Taekwon Son, Young-Ha Oh, Jeong-Yeon Lee, Gu Kong
Background: Despite the benefit of endocrine therapy, acquired resistance during or after treatment still remains a major challenge in estrogen receptor (ER)-positive breast cancer. We investigated the potential role of histone demethylase retinoblastoma-binding protein 2 (RBP2) in endocrine therapy resistance of breast cancer. Methods: Survival of breast cancer patients according to RBP2 expression was analyzed in three different breast cancer cohorts including METABRIC (n = 1980) and KM plotter (n = 1764)...
April 1, 2018: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29024706/identification-of-circular-rnas-in-human-aortic-valves
#16
Jianle Chen, Jun Wang, Yun Jiang, Weidong Gu, Buqing Ni, Haoliang Sun, Wanjun Gu, Liang Chen, Yongfeng Shao
With the wide application of RNA-Seq technology, thousands of circular RNAs (circRNAs) have been identified in different type of tissues and cells in many organisms, but little is known on the human aortic valve expressed circRNAs. In this study, we identified all circRNAs in two calcified human aortic valves, and characterized the features of all circRNAs. A total of 5476 circRNAs were identified in human aortic valves, including 1412 (25.79%) aortic valve specific circRNAs. Next, we showed that most aortic valve specific circRNAs were derived from the exonic regions of their host genes, and majority of the host genes contained less than three circRNAs...
October 9, 2017: Gene
https://www.readbyqxmd.com/read/29022350/sensitive-and-accurate-quantitation-of-phosphopeptides-using-tmt-isobaric-labeling-technique
#17
Xiaoyue Jiang, Ryan Bomgarden, Joseph Brown, Devin L Drew, Aaron M Robitaille, Rosa Viner, Andreas R Huhmer
Phosphorylation is an essential post-translational modification for regulating protein function and cellular signal transduction. Mass spectrometry (MS) combined with isobaric tandem mass tags (TMTs) has become a powerful platform for simultaneous, large-scale phospho-proteome site identification and quantitation. To improve the accuracy of isobaric tag-based quantitation in complex proteomic samples, MS3-based acquisition methods such as Synchronous Precursor Selection (SPS) have been used. However, the method suffers from lower peptide identification rates when applied to enriched phosphopeptide samples compared with unmodified samples due to differences in phosphopeptide fragmentation patterns during tandem MS...
October 24, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28992000/differential-expression-of-neuregulin-1-nrg1-and-candidate-mirna-regulating-nrg1-transcription-in-the-chicken-oviduct-in-response-to-hormonal-changes
#18
W Jeong, H Bae, W Lim, F W Bazer, G Song
Neuregulin 1 (NRG1), a signaling protein that binds to members of the erythroblastoma (ErbB) family, is known to play essential biological roles in mediating cell-cell interactions and orchestrating vital cell functions in the heart and nervous system. NRG1 is closely associated with developmental processes in various organs and expression of several NRG1 isoforms are regulated by estrogen. However, expression and its hormonal regulation during development of the female reproductive tract remain unknown. The reproductive system of chickens undergoes dynamic morphological and functional changes in response to estrogen and the molting process...
September 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28963790/phase-i-study-of-induction-chemotherapy-with-afatinib-ribavirin-and-weekly-carboplatin-and-paclitaxel-for-stage-iva-ivb-human-papillomavirus-associated-oropharyngeal-squamous-cell-cancer
#19
Lara A Dunn, Matthew G Fury, Eric J Sherman, Alan A Ho, Nora Katabi, Sofia S Haque, David G Pfister
BACKGROUND: The human papillomavirus (HPV) E6 oncoprotein enhances the oncogenic potential of ErbB proteins in HPV-related malignancies. This phase I study evaluates the addition of afatinib, an ErbB family inhibitor, and ribavirin to paclitaxel and carboplatin induction chemotherapy in HPV-associated, locally advanced oropharyngeal squamous cell carcinoma (SCC). METHODS: This dose escalation study included 2 doses of oral afatinib: 30 and 40 mg daily. Ribavirin dosing was weight based...
September 30, 2017: Head & Neck
https://www.readbyqxmd.com/read/28961841/dual-met-and-erbb-inhibition-overcomes-intratumor-plasticity-in-osimertinib-resistant-advanced-non-small-cell-lung-cancer-nsclc
#20
A Martinez-Marti, E Felip, J Matito, E Mereu, A Navarro, S Cedrés, N Pardo, A Martinez de Castro, J Remon, J M Miquel, A Guillaumet-Adkins, E Nadal, G Rodriguez-Esteban, O Arqués, R Fasani, P Nuciforo, H Heyn, A Villanueva, H G Palmer, A Vivancos
Background: Third-generation epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) such as osimertinib are the last line of targeted treatment of metastatic non-small-cell lung cancer (NSCLC) EGFR-mutant harboring T790M. Different mechanisms of acquired resistance to third-generation EGFR-TKIs have been proposed. It is therefore crucial to identify new and effective strategies to overcome successive acquired mechanisms of resistance. Methods: For Amplicon-seq analysis, samples from the index patient (primary and metastasis lesions at different timepoints) as well as the patient-derived orthotopic xenograft tumors corresponding to the different treatment arms were used...
October 1, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
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