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https://www.readbyqxmd.com/read/29310786/production-and-purification-of-recombinant-human-sparc
#1
Gail Workman, Amy D Bradshaw
The matricellular protein SPARC (secreted protein acidic and rich in cysteine, also known as osteonectin or as BM-40) is a collagen-binding protein with a capacity to induce cell rounding and influence proliferation in cultured cells. In mice that do not express SPARC, fibrillar collagen is reduced in some adult tissues; notably, a reduction in fibrosis is reported in response to fibrotic stimuli in lungs, heart, skin, liver, and in the eye. Recently, mutations in the gene encoding SPARC were found in patients afflicted with osteogenesis imperfecta...
2018: Methods in Cell Biology
https://www.readbyqxmd.com/read/29299351/a-phase-2-trial-of-personalized-cytotoxic-therapy-based-on-tumor-immunohistochemistry-in-previously-treated-metastatic-pancreatic-cancer-patients
#2
Ramesh K Ramanathan, Glen J Weiss, Richard G Posner, N V Rajeshkumar, Gayle Jameson, Meraj Aziz, Antje Hoering, Vanessa Bolejack, Anirban Maitra, Monica Fulk, Edward C Stites, William S Hlavacek, Zoran Gatalica, Joanne Xiu, Manuel Hidalgo, Daniel D Von Hoff, Michael T Barrett
Background: The choice of a regimen in metastatic pancreatic cancer patients following progression on 1st line therapy is empiric and outcomes are unsatisfactory. This phase II study was performed to evaluate the efficacy of therapy selected by immunohistochemistry (IHC) in these patients following progression after one or more therapies. Methods: Eligible patients underwent a percutaneous biopsy of a metastatic lesion and treatment selection was determined by IHC...
December 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/29233721/antitumor-mir-150-5p-and-mir-150-3p-inhibit-cancer-cell-aggressiveness-by-targeting-spock1-in-head-and-neck-squamous-cell-carcinoma
#3
Keiichi Koshizuka, Toyoyuki Hanazawa, Naoko Kikkawa, Koji Katada, Atsushi Okato, Takayuki Arai, Tetsuya Idichi, Yusaku Osako, Yoshitaka Okamoto, Naohiko Seki
OBJECTIVE: Our recent studies have revealed that both strands of pre-miRNAs, the guide strand and the passenger strand, are involved in cancer pathogenesis. Analyses of miRNA expression signatures by RNA sequencing in head and neck squamous cell carcinoma (HNSCC) showed that both of the strands of pre-miR-150 (miR-150-5p and miR-150-3p) were significantly downregulated, and that these miRNAs acted as antitumor miRNAs in HNSCC cells. The aim of this study was to identify oncogenic genes in HNSCC cells that were regulated by miR-150-5p and miR-150-3p...
December 9, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/29129760/the-key-role-of-proinflammatory-cytokines-matrix-proteins-rankl-opg-and-wnt-%C3%AE-catenin-in-bone-healing-of-hip-arthroplasty-patients
#4
Jean Cassuto, Agnetha Folestad, Jan Göthlin, Henrik Malchau, Johan Kärrholm
INTRODUCTION: We still lack understanding of why some implants fail while most remain stable after decades of use. Proinflammatory cytokines, matrix proteins and bone regulating cytokines of the RANKL/OPG (receptor activator of nuclear factor kappa B ligand/osteoprotegerin) and Wnt/β-catenin pathways are mandatory for normal bone repair but their spatial and temporal role in the healing of primary total hip arthroplasties (THA) has not been previously shown. MATERIALS AND METHODS: Twenty-four osteoarthritis patients with one-sided well-fixed primary THA were prospectively monitored during 18years (18Y) with repeated blood samples, clinical variables and radiographs...
November 10, 2017: Bone
https://www.readbyqxmd.com/read/28969021/secreted-protein-acidic-and-rich-in-cysteine-sparc-induces-cell-migration-and-epithelial-mesenchymal-transition-through-wnk1-snail-in-non-small-cell-lung-cancer
#5
Jen-Yu Hung, Meng-Chi Yen, Shu-Fang Jian, Cheng-Ying Wu, Wei-An Chang, Kuan-Ting Liu, Ya-Ling Hsu, Inn-Wen Chong, Po-Lin Kuo
The extracellular matrix is a component of physiological microenvironment and a regulator of cellular processes such as migration and proliferation. Secreted Protein Acidic and Rich in Cysteine (SPARC/osteonectin) is an extracellular matrix-associated glycoprotein involved in the regulation of cell proliferation and cell migration in several types of cancers. However, the role of SPARC in lung cancer is paradoxical and details of the regulatory mechanism are not well-known. In this study, we investigated novel SPARC-mediated signaling pathways...
September 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28659612/regulation-of-spock1-by-dual-strands-of-pre-mir-150-inhibit-cancer-cell-migration-and-invasion-in-esophageal-squamous-cell-carcinoma
#6
Yusaku Osako, Naohiko Seki, Keiichi Koshizuka, Atsushi Okato, Tetsuya Idichi, Takayuki Arai, Itaru Omoto, Ken Sasaki, Yasuto Uchikado, Yoshiaki Kita, Hiroshi Kurahara, Kosei Maemura, Shoji Natsugoe
Analysis of our microRNA (miRNA) expression signatures of human cancers based on RNA sequencing have shown that both strands of pre-miR-150, miR-150-5p (the guide strand) and miR-150-3p (the passenger strand), are significantly reduced in cancer tissues. We have investigated the functional significance of both strands of pre-miR-150 in cancer cells. The aim of this study was to investigate the antitumor function of these miRNAs and how these miRNAs regulated oncogenic targets in esophageal squamous cell carcinoma (ESCC)...
November 2017: Journal of Human Genetics
https://www.readbyqxmd.com/read/28608802/enhanced-osteogenic-differentiation-in-zoledronate-treated-osteoporotic-patients
#7
Luca Dalle Carbonare, Monica Mottes, Giovanni Malerba, Antonio Mori, Martina Zaninotto, Mario Plebani, Alessandra Dellantonio, Maria Teresa Valenti
Bisphosphonates are well known inhibitors of osteoclast activity and thus may be employed to influence osteoblast activity. The present study was designed to evaluate the in vivo effects of zoledronic acid (ZA) on the proliferation and osteoblastic commitment of mesenchymal stem cells (MSC) in osteoporotic patients. We studied 22 postmenopausal osteoporotic patients. Densitometric, biochemical, cellular and molecular data were collected before as well as after 6 and 12 months of ZA treatment. Peripheral blood MSC-like cells were quantified by colony-forming unit fibroblastic assay; their osteogenic differentiation potential was evaluated after 3 and 7 days of induction, respectively...
June 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28534948/dual-strands-of-pre-mir%C3%A2-150-mir%C3%A2-150%C3%A2-5p-and-mir%C3%A2-150%C3%A2-3p-act-as-antitumor-mirnas-targeting-spock1-in-na%C3%A3-ve-and-castration-resistant-prostate-cancer
#8
Atsushi Okato, Takayuki Arai, Satoko Kojima, Keiichi Koshizuka, Yusaku Osako, Tetsuya Idichi, Akira Kurozumi, Yusuke Goto, Mayuko Kato, Yukio Naya, Tomohiko Ichikawa, Naohiko Seki
Analysis of our microRNA (miRNA) expression signature in human cancers has shown that guide and passenger strands of pre-miR‑150, i.e., miR‑150‑5p and miR‑150‑3p, are significantly downregulated in cancer tissues. In miRNA biogenesis, the passenger strand of miRNA is degraded and is thought to have no functions. Thus, the aim of this study was to investigate the functional significance of miR‑150‑5p and miR‑150‑3p in naïve prostate cancer (PCa) and castration-resistant prostate cancer (CRPC)...
May 17, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28281964/knockdown-of-spock1-inhibits-the-proliferation-and-invasion-in-colorectal-cancer-cells-by-suppressing-the-pi3k-akt-pathway
#9
Ping Zhao, Hai-Tao Guan, Zhi-Jun Dai, Yu-Guang Ma, Xiao-Xu Liu, Xi-Jing Wang
Sparc/osteonectin, cwcv, and kazal-like domains proteoglycan (testican) 1 (SPOCK1), known as testican-1, were found to be involved in the development and progression of tumors. However, in colorectal cancer (CRC), the expression pattern of SPOCK1 and its functional role remain poorly investigated. In the present study, we explored the role of SPOCK1 in CRC. Our results demonstrated that SPOCK1 is overexpressed in CRC cell lines. SPOCK1 silencing significantly inhibited the proliferation in vitro and the tumor growth in vivo...
October 27, 2016: Oncology Research
https://www.readbyqxmd.com/read/28163933/analysis-of-argonaute-complex-bound-mrnas-in-du145-prostate-carcinoma-cells-reveals-new-mirna-target-genes
#10
Jaroslaw Szczyrba, Volker Jung, Michaela Beitzinger, Elke Nolte, Sven Wach, Martin Hart, Sandra Sapich, Marc Wiesehöfer, Helge Taubert, Gunther Wennemuth, Norbert Eichner, Thomas Stempfl, Bernd Wullich, Gunter Meister, Friedrich A Grässer
Posttranscriptional gene regulation by microRNAs (miRNAs) contributes to the induction and maintenance of prostate carcinoma (PCa). To identify mRNAs enriched or removed from Ago2-containing RISC complexes, these complexes were immunoprecipitated from normal prostate fibroblasts (PNFs) and the PCa line DU145 and the bound mRNAs were quantified by microarray. The analysis of Ago complexes derived from PNFs or DU145 confirmed the enrichment or depletion of a variety of mRNAs already known from the literature to be deregulated...
2017: Prostate Cancer
https://www.readbyqxmd.com/read/28103946/epcr-promotes-breast-cancer-progression-by-altering-spock1-testican-1-mediated-3d-growth
#11
Naiara Perurena, Carolina Zandueta, Susana Martínez-Canarias, Haritz Moreno, Silvestre Vicent, Ana S Almeida, Elisabet Guruceaga, Roger R Gomis, Marta Santisteban, Mikala Egeblad, José Hermida, Fernando Lecanda
BACKGROUND: Activated protein C/endothelial protein C receptor (APC/EPCR) axis is physiologically involved in anticoagulant and cytoprotective activities in endothelial cells. Emerging evidence indicates that EPCR also plays a role in breast stemness and human tumorigenesis. Yet, its contribution to breast cancer progression and metastasis has not been elucidated. METHODS: Transcriptomic status of EPCR was examined in a cohort of 286 breast cancer patients. Cell growth kinetics was evaluated in control and EPCR and SPARC/osteonectin, Cwcv, and kazal-like domains proteoglycan (SPOCK1/testican 1) silenced breast cancer cells in 2D, 3D, and in co-culture conditions...
January 19, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/27909812/in-phyllodes-tumors-of-the-breast-expression-of-sparc-osteonectin-bm40-mrna-by-in-situ-hybridization-correlates-with-protein-expression-by-immunohistochemistry-and-is-associated-with-tumor-progression
#12
Nah Ihm Kim, Ga-Eon Kim, Ji Shin Lee, Min Ho Park
Secreted protein acidic and rich in cysteine (SPARC) plays an essential role in tumor invasion and metastasis. The present work was undertaken to detect expression of SPARC mRNA in phyllodes tumors (PTs) and its association with SPARC protein expression. This study also evaluated expression of SPARC mRNA and its correlation between grade and clinical behavior of PTs. In addition, we assessed in PTs the association of expression of SPARC with that of matrix metalloproteinase (MMP)-2 and of MMP-9. SPARC mRNA expression was determined by RNAscope in situ hybridization (ISH) in 50 benign, 22 borderline, and 10 malignant PTs using a tissue microarray...
January 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/27881195/the-involvement-of-runx2-and-sparc-genes-in-the-bacterial-chondronecrosis-with-osteomyelitis-in-broilers
#13
E Paludo, A M G Ibelli, J O Peixoto, F C Tavernari, C A V Lima-Rosa, J R C Pandolfi, M C Ledur
Economic losses due to an increase of leg disorders in broilers have become a major concern of the poultry industry. Despite the efforts to reduce skeletal abnormalities in chickens, insufficient progress has been made. Bacterial chondronecrosis with osteomyelitis (BCO) is one of the main disorders that affect bone integrity in broilers. However, the genetic pathways and genes involved in most bone problems, including BCO, remains unclear. In this study, femoral samples from male broilers with 45 days of age affected or not with BCO were used to compare the relative expression with a reverse transcription real time PCR approach of 13 candidate genes: SPP1 (osteopontin), TNFRSF11B (osteoprotegerin), SPARC (osteonectin), CALB1 (calbidin 1), CALM (Calmodulin 2), IBSP (sialoprotein), COL1A2 (collagen, type I, α 2), BMP2 (bone morphogenetic protein 2), BMP3 (bone morphogenetic protein 3), RANKL (κ-B nuclear factor ligand), SMAD1 (SMAD family member 1), LEPR (leptin receptor) and RUNX2 (related transcription factor Runt 2)...
June 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/27768913/recombinant-human-bone-morphogenetic-protein-2-rhbmp-2-immobilized-on-laser-fabricated-3d-scaffolds-enhance-osteogenesis
#14
Maria Chatzinikolaidou, Charalampos Pontikoglou, Konstantina Terzaki, Maria Kaliva, Athanasia Kalyva, Eleni Papadaki, Maria Vamvakaki, Maria Farsari
The regeneration of bone via a tissue engineering approach involves components from the macroscopic to the nanoscopic level, including appropriate 3D scaffolds, cells and growth factors. In this study, hexagonal scaffolds of different diagonals were fabricated by Direct Laser Writing using a photopolymerizable hybrid material. The proliferation of bone marrow (BM) mesenchymal stem cells (MSCs) cultured on structures with various diagonals, 50, 100, 150 and 200μm increased significantly after 10days in culture, however without significant differences among them...
January 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27557648/formation-and-dissociation-of-sperm-bundles-in-monotremes
#15
Brett Nixon, Heath Ecroyd, Jean-Louis Dacheux, Francoise Dacheux, Valerie Labas, Steve D Johnston, Russell C Jones
Because monotremes are the earliest offshoot of the mammalian lineage, the platypus and short-beaked echidna were studied as model animals to assess the origin and biological significance of adaptations considered unique to therian mammals: epididymal sperm maturation and subsequent capacitation. We show that spermatozoa from both species assemble into bundles of approximately 100 cells during passage through the epididymis and that an epididymal protein-secreted protein, acidic, cysteine-rich (osteonectin; SPARC)-is involved in bundle formation...
October 2016: Biology of Reproduction
https://www.readbyqxmd.com/read/27486308/spock1-promotes-tumor-growth-and-metastasis-in-human-prostate-cancer
#16
Qi Chen, Yuan-Ting Yao, Huan Xu, Yan-Bo Chen, Meng Gu, Zhi-Kang Cai, Zhong Wang
Prostate cancer is the most diagnosed noncutaneous cancer and ranks as the second leading cause of cancer-related deaths in American males. Metastasis is the primary cause of prostate cancer mortality. Survival rate is only 28% for metastatic patients, but is nearly 100% for patients with localized prostate cancers. Molecular mechanisms that underlie this malignancy remain obscure, and this study investigated the role of SPARC/osteonectin, cwcv, and kazal-like domain proteoglycan 1 (SPOCK1) in prostate cancer progression...
2016: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/27421134/sparc-overexpression-in-primary-tumors-correlates-with-disease-recurrence-and-overall-survival-in-patients-with-triple-negative-breast-cancer
#17
Anjie Zhu, Peng Yuan, Feng Du, Ruoxi Hong, Xiaoyan Ding, Xiuqing Shi, Ying Fan, Jiayu Wang, Yang Luo, Fei Ma, Pin Zhang, Qing Li, Binghe Xu
SPARC/osteonectin expression is reportedly altered in various malignancies. However, little is known regarding to the prognostic value of SPARC in triple-negative breast cancer (TNBC) patients. In this study, immunohistochemistry and immunoreactive scores (IRSs) were used to evaluate SPARC protein expression in primary tumors from 211 TNBC patients with up to 10 years of clinical follow-up data. High SPARC expression (IRS ≥3) was detected in 52.1% of primary tumors. Patients expressing high SPARC levels had worse disease-free survival (DFS) (HR=1...
November 22, 2016: Oncotarget
https://www.readbyqxmd.com/read/27339669/osteonectin-sparc-expression-in-vascular-calcification-in-vitro-and-ex-vivo-studies
#18
Paola Ciceri, Francesca Elli, Laura Cappelletti, Delfina Tosi, Federica Savi, Gaetano Bulfamante, Mario Cozzolino
Osteonectin, also termed SPARC, is a noncollagenous protein of bone matrix. Since there are controversial results regarding its role during the process of vascular calcification, we investigated osteonectin expression in our in vitro calcification model. Rat vascular smooth muscle cells (VSMCs) were challenged with high phosphate (5 mmol/L Pi) and analyzed quantifying calcium levels, through immunohistochemical studies, and studying gene expression. We detected a peak of osteonectin expression at day 7 in cell treated with high phosphate...
June 23, 2016: Calcified Tissue International
https://www.readbyqxmd.com/read/27213596/sparc-gene-deletion-protects-against-toxic-liver-injury-and-is-associated-to-an-enhanced-proliferative-capacity-and-reduced-oxidative-stress-response
#19
Estanislao Peixoto, Catalina Atorrasagasti, Mariana Malvicini, Esteban Fiore, Marcelo Rodriguez, Mariana Garcia, Paola Finocchieto, Juan J Poderoso, Fernando Corrales, Guillermo Mazzolini
SPARC, also known as osteonectin and BM-40, is a matricellular protein with a number of biological functions. Hepatic SPARC expression is induced in response to thioacetamide, bile-duct ligation, and acute injuries such as concanavalin A and lipopolysacharide (LPS)/D-galactosamine. We have previously demonstrated that the therapeutic inhibition of SPARC or SPARC gene deletion protected mice against liver injury. We investigated the mechanisms involved in the protective effect of SPARC inhibition in mice. We performed a proteome analysis of livers from SPARC+/+ and SPARC-/- mice chronically treated with thioacetamide...
May 18, 2016: Oncotarget
https://www.readbyqxmd.com/read/27108836/spock1-promotes-the-proliferation-migration-and-invasion-of-glioma-cells-through-pi3k-akt-and-wnt-%C3%AE-catenin-signaling-pathways
#20
Jinghui Yang, Qiwei Yang, Jing Yu, Ximeng Li, Shan Yu, Xuewen Zhang
Sparc/osteonectin, cwcv and kazal-like domains proteoglycan (testican) 1 (SPOCK1) has been reported to promote the growth and progression of various tumors. In this study, we focus on assessing the effect of SPOCK1 on proliferation, migration and invasion in glioma cells and elucidating its related mechanisms. The results of our present study demonstrated that overexpression of SPOCK1 promoted the proliferation and inhibited apoptosis in glioma cells. Additionally, overexpression of SPOCK1 promoted the migration and invasion potential of glioma cells...
June 2016: Oncology Reports
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