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Breast cancer tumor markers

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https://www.readbyqxmd.com/read/29908284/downregulation-of-scara5-may-contribute-to-breast-cancer-via-promoter-hypermethylation
#1
Damla Ulker, Yeliz Emine Ersoy, Zuhal Gucin, Mahmut Muslumanoglu, Nur Buyru
Breast cancer is the most common malignant tumor in women worldwide. Breast tumors mostly exhibit aberrant gene expression and DNA hypermethylation patterns that predispose the disease. Understanding the genetic and epigenetic factors that contribute to breast cancer development is important to identify novel diagnostic and prognostic markers. SCARA5: Scavenger receptor class A, member 5; is a member of the scavenger receptor family located on chromosome 8p21 which is a frequently deleted region in human cancers...
June 13, 2018: Gene
https://www.readbyqxmd.com/read/29908185/design-and-development-of-pegylated-liposomal-formulation-of-her2-blocker-lapatinib-for-enhanced-anticancer-activity-and-diminshed-cardiotoxicity
#2
Richa Shrivastava, Shruti Trivedi, Pankaj Kumar Singh, Mohammad Asif, Manish Kumar Chourasia, Amit Khanna, Smrati Bhadauria
Breast cancer is most frequently diagnosed cancer and fifth leading cause of death in women. About 20-30% of all breast cancers overexpress HER2/neu receptors. Lapatinib is a dual tyrosin kinase inhibitor of EGFR and HER2. It exhibits its anticancer effect via blocking intracellular domain of HER2 receptor in breast cancer. Lapatinib belongs to class II of BSC classification due to its poor solubility restricting its clinical application. Due to presence of HER2 receptor on cardiomyocytes, it is associated with generation of cardiotoxicity...
June 13, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29907770/na-hco-3-cotransporter-nbcn1-slc4a7-accelerates-erbb2-induced-breast-cancer-development-and-tumor-growth-in-mice
#3
Soojung Lee, Trine V Axelsen, Nicolai Jessen, Stine F Pedersen, Pernille Vahl, Ebbe Boedtkjer
Metabolic acid production challenges cellular pH homeostasis in solid cancer tissue, and mechanisms of net acid extrusion represent promising new targets for breast cancer therapy. Here, we used genetically engineered mice to investigate the contribution of the Na+ ,HCO3 - -cotransporter NBCn1 (Slc4a7) to intracellular acid-base regulation in ErbB2-induced breast cancer tissue and the consequences of NBCn1 knockout for breast tumor development and growth. We demonstrate an approximately 2-fold increase of NBCn1 protein abundance in ErbB2-induced breast cancer tissue compared to normal breast tissue despite a 4-fold decrease in the NBCn1 mRNA level...
June 15, 2018: Oncogene
https://www.readbyqxmd.com/read/29906747/anti-tumor-and-anti-metastasis-activities-of-honey-bee-larvae-powder-by-suppressing-the-expression-of-ezh2
#4
Masakatsu Kageyama, Kejuan Li, Shuang Sun, Guoqing Xing, Ran Gao, Zhongfang Lei, Zhenya Zhang
Honey bee larvae products have been widely used as traditional daily supplements and complementary medicine for health promotion. However, there is little scientific evidence about their bioactivities. This study was designed to examine the anti-tumor and anti-metastasis effects of honey bee larvae powder (HLP) and explore the underlying mechanism. A subcutaneous transplantation model (murine breast cancer cell 4T1-LUC) and lung metastasis model (murine melanoma cell B16-F10) were established to evaluate the anti-tumor and anti-metastasis effects of HLP...
June 12, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29906308/pik3ca-mutation-profiling-in-patients-with-breast-cancer-using-a-highly-sensitive-detection-system
#5
Tatsunori Shimoi, Akinobu Hamada, Marifu Yamagishi, Mitsuharu Hirai, Masayuki Yoshida, Tadaaki Nishikawa, Kazuki Sudo, Akihiko Shimomura, Emi NoguchI, Mayu Yunokawa, Kan Yonemori, Chikako Shimizu, Takayuki Kinoshita, Takahiro Fukuda, Yasuhiro Fujiwara, Kenji Tamura
PIK3CA mutations are common activating mutations associated with breast cancer (occurring in 20-30% of all cases) and are potent predictive markers for responses to PI3K inhibitors. Thus, it is important to develop sensitive methods to detect these mutations. We established a novel detection method using a quenching probe (QP) system to identify PIK3CA mutations, using DNA from 309 breast cancer tissues. In a developmental cohort, we determined the optimal detection threshold of the QP system with human tumor DNA from 119 freshly frozen tumor samples...
June 15, 2018: Cancer Science
https://www.readbyqxmd.com/read/29905031/silencing-arhgap9-correlates-with-the-risk-of-breast-cancer-and-inhibits-the-proliferation-migration-and-invasion-of-breast-cancer
#6
Tianyi Wang, Minwen Ha
Breast cancer (BC) is one of the most common malignant tumors in women, and screening relevant genes and markers that are involved in BC tumor genesis and progression is of great value. We previously found that messenger RNA expression of ARHGAP9 was high in BC tissue, but it is unclear whether ARHGAP9 participates in the progression of human BC. In this study, we found that ARHGAP9 expression was correlated with poor patient survival, American Joint Committee on Cancer clinical staging, tumor size, and tumor differentiation...
June 15, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29902924/cancer-stem-cells-in-triple-negative-breast-cancer-a-potential-target-and-prognostic-marker
#7
Christopher J O'Conor, Tiffany Chen, Iván González, Dengfeng Cao, Yan Peng
Triple-negative breast cancer (TNBC) is an aggressive disease with poor outcome, and lacks targeted therapy. Recent studies suggest that cancer stem cells play an important role in tumorigenesis and tumor biology of TNBC. Both CD44+ /CD24- and ALDH1+ breast cancer stem cells are enriched in TNBC and may contribute to the propensity of TNBC for chemotherapy resistance and tumor metastasis. There is new evidence to support the evaluation of cancer stem cells in TNBC for diagnostic purposes. Targeting cancer stem cells may also be a promising, novel strategy for the treatment of TNBC...
June 15, 2018: Biomarkers in Medicine
https://www.readbyqxmd.com/read/29902579/androgen-receptor-expression-is-a-favorable-prognostic-factor-in-triple-negative-breast-cancers
#8
Tao Zuo, Parker Wilson, Ali Fuat Cicek, Malini Harigopal
Androgen receptor (AR) expression is an emerging prognostic marker that has been observed in 25% to 75% of triple negative breast cancers (TNBCs) that lack estrogen receptor, progesterone receptor and HER2 overexpression. TNBCs are treated with AR-targeted therapies and standardized evaluation of AR expression may help guide patient management. Basal-like TNBCs are a subgroup of TNBCs defined by positive immunoreactivity for CK5/6 or EGFR that carry a worse prognosis. However, it's unclear whether basal-like TNBCs have a different rate of AR positivity or if AR expression is predictive of disease free survival in this patient group...
June 11, 2018: Human Pathology
https://www.readbyqxmd.com/read/29902578/the-impact-of-the-effectiveness-of-gata3-as-a-prognostic-factor-in-breast-cancer
#9
Fararjeh-Salah Abdul Fattah, Shih-Hsin Tu, Li-Ching Chen, Yun-Ru Liu, Yen-Kuang Lin, Hang-Lung Chang, Hui-Wen Chang, Chih-Hsiung Wu, Wendy-Hwang Verslues, Yuan-Soon Ho
The transcription factor GATA3 plays a significant role in mammary gland development and differentiation. We analyzed expression of GATA3 in breast cancer (BC) cell lines and clinical specimens from BC patients in Taiwan. Semi-quantitative reverse transcriptase (RT)-polymerase chain reaction (PCR), quantitative real-time PCR carried out to determine the mRNA level of GATA3 from 241 pairs of matched tumor and adjacent normal tissues from anonymous female donors. GATA3 immunohistochemistry (IHC) staining and H-score were performed (n=25)...
June 11, 2018: Human Pathology
https://www.readbyqxmd.com/read/29902299/association-of-t-cell-receptor-repertoire-use-with-response-to-combined-trastuzumab-lapatinib-treatment-of-her2-positive-breast-cancer-secondary-analysis-of-the-neoaltto-randomized-clinical-trial
#10
Ryan L Powles, David Redmond, Christos Sotiriou, Sherene Loi, Debora Fumagalli, Paolo Nuciforo, Nadia Harbeck, Evandro de Azambuja, Severine Sarp, Serena Di Cosimo, Jens Huober, Jose Baselga, Martine Piccart-Gebhart, Olivier Elemento, Lajos Pusztai, Christos Hatzis
Importance: Dual anti-HER2 blockade increased the rate of pathologic complete response (pCR) in the Neoadjuvant Lapatinib and/or Trastuzumab Treatment Optimisation (NeoALTTO) trial, and high immune gene expression was associated with pCR in all treatment arms. So far, no marker has been identified that is specifically associated with the benefit from dual HER2 blockade. Objective: To examine if use of the T-cell β chain variable genes adds to the potential association of immune gene signatures with response to dual HER2 blockade...
June 14, 2018: JAMA Oncology
https://www.readbyqxmd.com/read/29901696/rna-interference-targeting-cd147-inhibits-metastasis-and-invasion-of-human-breast-cancer-mcf-7-cells-by-downregulating-mmp-9-vegf-expression
#11
Fang Li, Junping Zhang, Jiqiang Guo, Yuan Jia, Yaping Han, Zhuanhua Wang
Breast cancer is one of the most common malignancies. It is necessary to identify new markers for predicting tumor progression and therapeutic molecular targets. It has been reported that CD147 is one of the most commonly expressed proteins in primary tumors and in metastatic cells. In this study, we investigated the role of CD147 in human breast cancer metastasis and invasion, and examined its underlying molecular mechanisms. Immunohistochemistry results revealed high expression of CD147 in human breast tumor tissues, which was positively correlated with the malignancy of breast cancer...
June 12, 2018: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/29901185/salidroside-inhibits-migration-invasion-and-angiogenesis-of-mda%C3%A2-mb-231-tnbc-cells-by-regulating-egfr-jak2-stat3-signaling-via-mmp2
#12
Dong Young Kang, Nipin Sp, Doh Hoon Kim, Youn Hee Joung, Hyo Gun Lee, Young Min Park, Young Mok Yang
The major hallmarks of tumor progression are angiogenesis, migration and metastasis. Among the components of Rhodiola rosea, salidroside (p‑hydroxyphenethyl-β‑d-glucoside) is one of the most potent, and is present in all Rhodiola species. Recent data have revealed the anticancer effects of salidroside; however, the mechanism underlying its ability to inhibit tumor angiogenesis remains unknown. The present study aimed to analyze how salidroside affects major factors involved in breast cancer, and to elucidate its ability to inhibit angiogenesis and invasion...
June 5, 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29898994/flightless-i-blocks-p62-mediated-recognition-of-lc3-to-impede-selective-autophagy-and-promote-breast-cancer-progression
#13
Jian-Ping He, Pei-Pei Hou, Qi-Tao Chen, Wei-Jia Wang, Xiao-Yu Sun, Peng-Bo Yang, Ying-Ping Li, Lu-Ming Yao, Xiaotong Li, Xin-Dong Jiang, Kun-Yi Chien, Zhi-Ming Zhang, Qiu-Wan Wu, Allison J Cowin, Qiao Wu, Hang-Zi Chen
p62 is a receptor that facilitates selective autophagy by interacting simultaneously with cargoes and LC3 protein on the autophagosome to maintain cellular homeostasis. However, the regulatory mechanism(s) behind this process and its association with breast cancer remain to be elucidated. Here we report that Flightless-I (FliI), a novel p62-interacting protein, promotes breast cancer progression by impeding selective autophagy. FliI was highly expressed in clinical breast cancer samples, and heterozygous deletion of FliI retarded development of mammary tumors in PyVT mice...
June 13, 2018: Cancer Research
https://www.readbyqxmd.com/read/29894647/microrna-30-mediates-cell-invasion-and-metastasis-in-breast-cancer
#14
Shuangzhen Bao, Xinying Wang, Zhichao Wang, Jinqiang Yang, Fangzhen Liu, Changheng Yin
Despite the great progress in recent years, many aspects of the pathogenesis and progression of breast cancer remain unclear. A better understanding on the molecular mechanisms underlying the metastasis and recurrence is crucial to improve the treatment of this lethal disease. MCF-7 cells were xenografted into mice until visible tumor developed and the cells from tumor tissue and adjacent normal tissue were cultured with 3 passages as MT cells and IT cells, respectively. Microarray analysis was performed to detect several viable MicroRNAs in these two types of cells...
June 12, 2018: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/29893312/correlation-of-proliferative-index-with-various-clinicopathologic-prognostic-parameters-in-primary-breast-carcinoma-a-study-from-north-india
#15
Nisha Marwah, Ashima Batra, Sanjay Marwah, Veena Gupta, Samta Shakya, Rajeev Sen
Aim: Routine assessment of cell proliferation is recommended in the pathologic evaluation for all breast cancers. Considering the poor reproducibility and interobserver variability in mitotic counts, Ki-67 is an easily available and reliable substitute for mitotic counts and has been shown to have a significant relationship with the histologic grade of malignancy and the mitotic activity of tumors. Our study aimed at exploring Ki-67 expression and studying its correlation with other established prognostic parameters...
April 2018: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/29887788/using-a-new-marker-clip-system-in-breast-cancer-tumark-vision%C3%A2-clip-feasibility-testing-in-everyday-clinical-practice
#16
Anna Marlene Rüland, Friederike Hagemann, Mattea Reinisch, Johannes Holtschmidt, Aylin Kümmel, Christine Dittmer-Grabowski, Frank Stöblen, Horst Rotthaus, Volker Dreesmann, Jens-Uwe Blohmer, Sherko Kümmel
Background: This study presents first feasibility experiences with a new 3-dimensional (3D) marker clip system in clinical practice. The rate of clinical complete responses in the treatment of breast cancer patients is increasing; additionally, a change to targeted axillary dissection is being considered after neoadjuvant chemotherapy (NACT). Consequently, marker clips are needed which are reliable and easy to handle even in the axillary lymph node system. Methods: A total of 50 patients from the Breast Care Unit of the Kliniken Essen Mitte were included...
April 2018: Breast Care
https://www.readbyqxmd.com/read/29883487/androgen-receptor-positive-triple-negative-breast-cancer-clinicopathologic-prognostic-and-predictive-features
#17
Kristine Astvatsaturyan, Yong Yue, Ann E Walts, Shikha Bose
INTRODUCTION: Overexpression of the androgen receptor (AR) characterizes a distinct molecular subset of triple negative breast carcinomas (TNBC). The role of AR as a prognostic/predictive biomarker in TNBC is controversial, but increasing evidence suggests that this subset may respond to therapeutic agents targeting AR. Evaluation of AR has not been standardized, and criteria for selection of patients for antiandrogen therapy remain controversial. In this study we determine the appropriate threshold of AR immunoreactivity to define AR positive (AR+) TNBC, describe the clinicopathologic features of AR+ TNBC, and discuss the utility of AR positivity as a prognostic and predictive marker in TNBC...
2018: PloS One
https://www.readbyqxmd.com/read/29879416/reevaluating-e-cadherin-and-%C3%AE-catenin-a-pan-cancer-proteomic-approach-with-an-emphasis-on-breast-cancer
#18
Nicholas Borcherding, Kimberly Cole, Paige Kluz, Michael Jorgensen, Ryan Kolb, Andrew Bellizzi, Weizhou Zhang
E-cadherin is conventionally considered to be a good prognostic marker in cancer. The loss of E-cadherin is one of the key hallmarks of epithelial-to-mesenchymal transition, a biological process that promotes cancer cell invasiveness and metastasis. Recent evidence has cast doubt on the importance of epithelial-to-mesenchymal transition in metastasis. The availability of protein-level data in the Cancer Genome Atlas allows for the quantitative analysis of protein and prognosis. The prognostic values of E-cadherin and β-catenin were revisited across 19 cancer types and high E-cadherin was found to correlate with good prognosis in most cancers...
June 4, 2018: American Journal of Pathology
https://www.readbyqxmd.com/read/29874851/ripk2-new-elements-in-modulating-inflammatory-breast-cancer-pathogenesis
#19
Alaa Zare, Alexandra Petrova, Mehdi Agoumi, Heather Amstrong, Gilbert Bigras, Katia Tonkin, Eytan Wine, Shairaz Baksh
Inflammatory breast cancer (IBC) is a rare and aggressive form of breast cancer that is associated with significantly high mortality. In spite of advances in IBC diagnoses, the prognosis is still poor compared to non-IBC. Due to the aggressive nature of the disease, we hypothesize that elevated levels of inflammatory mediators may drive tumorigenesis and metastasis in IBC patients. Utilizing IBC cell models and patient tumor samples, we can detect elevated NF-κB activity and hyperactivation of non-canonical drivers of NF-κB (nuclear factor kappaB)-directed inflammation such as tyrosine phosphorylated receptor-interacting protein kinase 2 (pY RIPK2), when compared to non-IBC cells or patients...
June 5, 2018: Cancers
https://www.readbyqxmd.com/read/29873205/optical-spectroscopic-sensing-of-tumor-hypoxia
#20
Sina Dadgar, Joel Rodríguez Troncoso, Narasimhan Rajaram
Tumor hypoxia is a critical indicator of poor clinical outcome in patients with cancers of the breast, cervix, and oral cavity. The ability to noninvasively and reliably monitor tumor oxygenation both prior to and during therapy can aid in identifying poor treatment response earlier than is currently possible and lead to effective changes in treatment regimen. Diffuse reflectance spectroscopy (DRS) has been used in several studies to measure tissue scattering, total hemoglobin content (THb), and vascular oxygenation (sO2) in tissue...
June 2018: Journal of Biomedical Optics
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