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annexin A2

Sayantan Maji, Pankaj Chaudhary, Irina Akopova, Phung M Nguyen, Richard J Hare, Ignacy Gryczynski, Jamboor K Vishwanatha
: Tumor-derived exosomes are emerging mediators of tumorigenesis and tissue-specific metastasis. Proteomic profiling has identified Annexin A2 as one of the most highly expressed proteins in exosomes; however, studies focused on the biological role of exosomal-AnnexinA2 (exo-AnxA2) are still lacking. In this study, mechanistic insight was sought regarding exo-AnxA2 and its function in angiogenesis and breast cancer metastasis. Multiple in vitro and in vivo techniques were used to study the role of exo-AnxA2 in angiogenesis...
October 19, 2016: Molecular Cancer Research: MCR
Peizhen Li, Jun Ying, Qingli Chang, Wen Zhu, Guangjian Yang, Teng Xu, Huiguang Yi, Ruowang Pan, Enyong Zhang, Xiaofeng Zeng, Chunxia Yan, Qiyu Bao, Shengbin Li
We studied phycoerythrin (PE) in human SW480 tumor cells and the underlying molecular mechanisms of action. PE inhibited cell proliferation as evidenced by CCK-8 assay. The IC50 values of phycoerythrin were 48.2 and 27.4 µg/ml for 24 and 48 h of exposure, respectively. PE induced apoptosis and cell cycle arrest in SW480 cells as observed under electron microscopy and with flow cytometry. Apoptosis increased from 5.1 (controls) to 39.0% in 80.0 µg/ml PE-treated cells. Differences in protein expression were identified using proteomic techniques...
October 11, 2016: Oncology Reports
Moitreyi Das, Sumantra Das
Docosahexaenoic acid (DHA), an important w-3 fatty acid exhibits differential behavior in cancer cells of neural origin when compared to that in normal healthy astrocytes. Treatment of C6 glioma and SH-SY5Y cell lines and primary astrocytes, representing the neoplastic cells and normal healthy cells respectively, with 100 µM DHA for 24 h showed significant loss of cell viability in the both the cancer cells as determined by MTT assay, whereas the primary astrocytes cultures were unaffected. Such loss of cell viability was due to apoptosis as confirmed by TUNEL staining and caspase-3 activation in cancer cells...
October 4, 2016: Apoptosis: An International Journal on Programmed Cell Death
Mirjana Bećarević
Antiphospholipid syndrome (APS) is characterized by thromboses and/or pregnancy losses. Laboratory criterion for the diagnosis of APS is the presence of antiphospholipid antibodies (anticardiolipin, anti-beta2-glycoprotein I (aβ2gpI) and lupus anticoagulant). On the one hand, the latest classification criteria for the diagnosis of APS emphasized that thrombotic manifestations of the syndrome should be without any signs of an inflammatory process, while on the other hand, some recent reports have suggested that APS is a "pro-inflammatory state...
October 4, 2016: Rheumatology International
Da-He Li, Chong-Ru He, Fu-Ping Liu, Jia Li, Jin-Wei Gao, Yang Li, Wei-Dong Xu
BACKGROUND: Annexin A2, a calcium-dependent phospholipid binding protein, is involved in osteogenesis. The objective of the present study was to explore the expression of Annexin A2 in spinal ligament tissues (LT) of ankylosing spondylitis (AS) patients and determine its pathological functions. METHODS: mRNA and protein expression of Annexin A2 was detected by real-time PCR and Western blotting, respectively. Interleukin-6 (IL-6) concentration in serum was assessed by enzyme linked immunosorbent assay...
September 30, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Teresia Kling, Roberto Ferrarese, Darren Ó hAilín, Patrik Johansson, Dieter Henrik Heiland, Fangping Dai, Ioannis Vasilikos, Astrid Weyerbrock, Rebecka Jörnsten, Maria Stella Carro, Sven Nelander
Glioblastomas are characterized by transcriptionally distinct subtypes, but despite possible clinical relevance, their regulation remains poorly understood. The commonly used molecular classification systems for GBM all identify a subtype with high expression of mesenchymal marker transcripts, strongly associated with invasive growth. We used a comprehensive data-driven network modeling technique (augmented sparse inverse covariance selection, aSICS) to define separate genomic, epigenetic, and transcriptional regulators of glioblastoma subtypes...
September 18, 2016: EBioMedicine
Yuelong Wang, Jiaojiao Deng, Gang Guo, Aiping Tong, Xirui Peng, Haifeng Chen, Jianguo Xu, Yi Liu, Chao You, Liangxue Zhou
Annexin A2 (AnxA2) is a highly conserved Ca2(+)-regulated membrane binding protein, which affects cell mobility and tumor progression. Adamantinomatous craniopharyngioma (AdaCP) are a kind of epithelial tumors of the sellar region with high tendency to recur. Robust biomarkers are required to predict tumor behavior and to establish follow-up individualized treatment approaches. In this study, we firstly compared four surgical AdaCP samples with normal brain by two-dimensional gel electrophoresis (2DE) proteomic analysis...
September 17, 2016: Journal of Neuro-oncology
Lixing Zhang, Chao Ge, Fangyu Zhao, Yang Zhang, Xin Wang, Ming Yao, Jinjun Li
Hepatocellular carcinoma (HCC) is highly resistant to chemotherapy. Research data supported that cancer stem cells (CSCs) may be responsible for the chemoresistance, and strategies that suppress CSCs stemness could also inhibit the drug resistance. In this study, we found that NRBP2 expression was downregulated in the CD133+ HCC CSCs. Most adjacent non-cancerous liver tissue analyzed expressed higher level of NRBP2 compared with cancerous tissue in HCC patients, and high NRBP2 expression indicated a better prognosis...
September 7, 2016: Cancer Research
V Salle, J Schmidt, A Smail, C Mazière, M A Conte, A Brulé, J C Mazière, E Cadet, Y E Herpe, P Duhaut
Acquired and inherited thrombophilia have both been reported to be associated with an increased risk of obstetric complications in early or later stages of pregnancy. Annexin A2 (ANXA2) is strongly expressed in vascular and placental tissues and plays a crucial role in fibrinolysis. The aim of the present study was to evaluate the prevalence of antibodies directed against ANXA2 in patients with recurrent miscarriage or obstetric complications. Anti-ANXA2 antibodies (aANXA2) were detected by ELISA in the sera from 46 women with obstetric morbidity, mainly recurrent miscarriage...
August 30, 2016: Journal of Reproductive Immunology
Beenu Moza Jalali, Pawel Likszo, Dariusz J Skarzynski
Conceptus attachment is a time-sensitive process that requires a synchronized uterine environment created by molecular changes in the endometrium in response to ovarian hormones and conceptus signals. Porcine conceptuses undergo rapid elongation and differentiation, and secrete estrogens that serve as maternal-recognition-of-pregnancy signals during the peri-implantation period (Days 11-12). Pregnancy-induced proteomic changes in the porcine endometrium were measured during this period using two-dimensional differential gel electrophoresis of endometrial protein lysates from Day-12 pregnant versus non-pregnant animals (n = 4 each)...
September 2016: Molecular Reproduction and Development
Lin Wang, Mei Mei, Aijian Qin, Jianqiang Ye, Kun Qian, Hongxia Shao
We previously identified chicken Annexin A2 (chANXA2) as a novel receptor for retrovirus avian leucosis virus subgroup J (ALV-J), using a DF1 cell line expressing the viral envelope (env) protein. To further probe whether other proteins participate in virus infection, we investigated several host proteins from co-immunoprecipitation with the DF1 cell line expressing viral env. Mass spectrometry analysis indicates that the chicken glucose-regulation protein 78 (chGRP78) of the DF1 membrane interacted with the ALV-J env protein...
2016: Veterinary Research
Jimin Xiong, Danijela Menicanin, Peter S Zilm, Victor Marino, P Mark Bartold, Stan Gronthos
The present study examined the cell surface proteome of human periodontal ligament stem cells (PDLSC) compared to human fibroblasts. Cell surface proteins were prelabelled with CyDye before processing to extract the membrane lysates, which were separated using 2D electrophoresis. Selected differentially expressed protein "spots" were identified using Mass spectrometry. Four proteins were selected for validation: CD73, CD90, Annexin A2, and sphingosine kinase 1 previously associated with mesenchymal stem cells...
2016: Stem Cells International
Carmela Ricciardelli, Noor A Lokman, Miranda P Ween, Martin Oehler
Ovarian cancer has a distinct tendency for metastasizing via shedding of cancerous cells into the peritoneal cavity and implanting onto the peritoneum that lines the pelvic organs. Once ovarian cancer cells adhere to the peritoneal cells, they migrate through the peritoneal layer and invade local organs. Alterations in the extracellular environment are critical for tumour initiation, progression and intra-peritoneal dissemination. To increase our understanding of the molecular mechanisms involved in ovarian cancer metastasis and to identify novel therapeutic targets we recently studied the interaction of ovarian cancer and peritoneal cells using a proteomic approach...
August 30, 2016: Endocrine-related Cancer
Ann Kari Grindheim, Anni Vedeler
Annexin A2 (AnxA2) is present in multiple cellular compartments and interacts with numerous ligands including calcium, proteins, cholesterol, negatively charged phospholipids and RNA. These interactions are tightly regulated by its post-translational modifications. The levels of AnxA2 and its Tyr23 phosphorylated form (pTyr23AnxA2) are increased in many cancers and the protein is involved in malignant cell transformation, metastasis and angiogenesis. Our previous studies of rat pheochromocytoma (PC12) cells showed that reactive oxygen species (ROS) induce rapid, simultaneous and transient dephosphorylation of nuclear AnxA2, most likely associating with PML bodies, while AnxA2 associated with F-actin at the cell cortex undergoes Tyr23 phosphorylation...
July 2016: Communicative & Integrative Biology
Sejal Desai, Nishad Srambikkal, Hansa D Yadav, Neena Shetake, Murali M S Balla, Amit Kumar, Pritha Ray, Anu Ghosh, B N Pandey
Even though bystander effects pertaining to radiation risk assessment has been extensively studied, the molecular players of radiation induced bystander effect (RIBE) in the context of cancer radiotherapy are poorly known. In this regard, the present study is aimed to investigate the effect of irradiated tumor cells on the bystander counterparts in mouse fibrosarcoma (WEHI 164 cells) tumor model. Mice co-implanted with WEHI 164 cells γ-irradiated with a lethal dose of 15 Gy and unirradiated (bystander) WEHI 164 cells showed inhibited tumor growth, which was measured in terms of tumor volume and Luc+WEHI 164 cells based bioluminescence in vivo imaging...
2016: PloS One
Thanuja D K Herath, Richard P Darveau, Chaminda J Seneviratne, Cun-Yu Wang, Yu Wang, Lijian Jin
Periodontal (gum) disease is a highly prevalent infection and inflammation accounting for the majority of tooth loss in adult population worldwide. Porphyromonas gingivalis is a keystone periodontal pathogen and its lipopolysaccharide (PgLPS) acts as a major virulence attribute to the disease. Herein, we deciphered the overall host response of human gingival fibroblasts (HGFs) to two featured isoforms of tetra-acylated PgLPS1435/1449 and penta-acylated PgLPS1690 with reference to E. coli LPS through quantitative proteomics...
2016: Scientific Reports
Jeffrey M Hord, Rachel Botchlett, John M Lawler
Age-related loss of skeletal muscle mass and function, referred to as sarcopenia, is mitigated by lifelong calorie restriction as well as exercise. In aged skeletal muscle fibers there is compromised integrity of the cell membrane that may contribute to sarcopenia. The purpose of this study was to determine if lifelong mild (8%) caloric restriction (CR) and lifelong CR+voluntary wheel running (WR) could ameliorate disruption of membrane scaffolding and signaling proteins during the aging process, thus maintaining a favorable, healthy membrane environment in plantaris muscle fibers...
October 2016: Experimental Gerontology
Praveenkumar Shetty, Vidya Shankar Patil, Rajshekar Mohan, Leonard Clinton D'souza, Anil Bapu Bargale, Basavaraj R Patil, Dinesh U S, Vikram Haridas, Shrirang P Kulkarni
BACKGROUND: AnnexinA2 (AnxA2) membrane deposition has a critical role in HB-EGF shedding as well as IL-6 secretion in breast cancer cells. This autocrine cycle has a major role in cancer cell proliferation, migration and metastasis. The objective of the study is to demonstrate AnxA2 mediated autocrine regulation via HB-EGF and IL-6 in Her-2 negative breast cancer progression. METHODS: Secretory AnxA2, HB-EGF and IL-6 were analysed in the peripheral blood sample of Her-2 negative (n=20) and positive breast cancer patients (n=16)...
August 5, 2016: Annals of Clinical Biochemistry
Isabelle V Leefa Chong San, Gaëlle Prost, Jennifer A Williams, Stephen E Moss, Ulrike A Nuber
Podocalyxin (PODXL) is a highly glycosylated and sialylated transmembrane protein that is up-regulated in various types of tumors and whose expression levels positively correlate with tumor grade. We previously found Podxl to be highly expressed in murine tumorigenic neural stem/progenitor cells (NSPs). Here we investigated the effects of elevated Podxl levels in these cells. NSPs overexpressing Podxl did not form brain tumors upon intracranial transplantations, indicating that high levels of this gene alone are not sufficient for tumor initiation...
September 16, 2016: Biochemical and Biophysical Research Communications
Tetsushi Yamamoto, Mitsuhiro Kudo, Wei-Xia Peng, Hideyuki Takata, Hideki Takakura, Kiyoshi Teduka, Takenori Fujii, Kuniko Mitamura, Atsushi Taga, Eiji Uchida, Zenya Naito
Colorectal cancer (CRC) is one of the most common cancers worldwide, and many patients are already at an advanced stage when they are diagnosed. Therefore, novel biomarkers for early detection of colorectal cancer are required. In this study, we performed a global shotgun proteomic analysis using formalin-fixed and paraffin-embedded (FFPE) CRC tissue. We identified 84 candidate proteins whose expression levels were differentially expressed in cancer and non-cancer regions. A label-free semiquantitative method based on spectral counting and gene ontology (GO) analysis led to a total of 21 candidate proteins that could potentially be detected in blood...
July 28, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
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