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Dickkopf AND Wnt

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https://www.readbyqxmd.com/read/28530511/wnt-signaling-related-osteokines-and-transforming-growth-factors-before-and-after-a-single-bout-of-plyometric-exercise-in-child-and-adolescent-females
#1
Jennifer Dekker, Katlynne Nelson, Nigel Kurgan, Bareket Falk, Andrea Josse, Panagiota Klentrou
This study examined resting levels of catabolic and anabolic osteokines related to Wnt signaling and their responses to a single bout of plyometric exercise in child and adolescent females. Fourteen pre-menarcheal girls (10.5 ± 1.8 years old) and 12 post-menarcheal adolescent girls (15.0 ± 1.0 years old) performed a plyometric exercise trial. One resting and three post-exercise blood samples (5 min, 1h, 24h post-exercise) were analysed for sclerostin (SOST), dickkopf-1 (DKK-1), osteoprotegerin (OPG), receptor activator of nuclear factor kappa-β ligand (RANKL) and transforming growth factors (TGF-β1, TGF-β2 and TGF-β3)...
May 22, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28526959/adjuvant-tamoxifen-but-not-aromatase-inhibitor-therapy-decreases-serum-levels-of-the-wnt-inhibitor-dickkopf-1-while-not-affecting-sclerostin-in-breast-cancer-patients
#2
Andy Göbel, Jan D Kuhlmann, Theresa Link, Pauline Wimberger, Andrew J Browne, Martina Rauner, Lorenz C Hofbauer, Tilman D Rachner
PURPOSE: Endocrine therapies, including tamoxifen or aromatase inhibitors, are indispensable for the treatment of patients with estrogen receptor (ER)- and/or progesterone-positive breast cancer. Whereas tamoxifen displays partial ER agonistic effects in bone, aromatase inhibitors increase bone resorption and fracture risk. The Wnt inhibitors dickkopf-1 (DKK-1) and sclerostin negatively impact bone formation and are considered targets for the treatment of bone disorders. However, the effect of endocrine therapies on serum DKK-1 and sclerostin levels in patients with primary breast cancer remains elusive...
May 19, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28514532/the-dickkopf1-ckap4-axis-creates-a-novel-signaling-pathway-and-may-represent-a-molecular-target-for-cancer-therapy
#3
REVIEW
Akira Kikuchi, Katsumi Fumoto, Hirokazu Kimura
Dickkopf 1 (DKK1) is a secretory protein and antagonizes oncogenic Wnt signaling by binding to the Wnt co-receptor low-density lipoprotein receptor-related proteins 6 (LRP6). DKK1 is also suggested to regulate its own signaling to associate with tumor aggressiveness. However, the underlying mechanism by which DKK1 promotes cancer cell proliferation has remained to be clarified for a long time. It has been recently found that cytoskeleton-associated protein 4 (CKAP4), which was originally reported as an endoplasmic reticulum membrane protein, acts as a novel DKK1 receptor...
May 17, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28501564/wntless-promotes-bladder-cancer-growth-and-acts-synergistically-as-a-molecular-target-in-combination-with-cisplatin
#4
Sebastian C Schmid, Anuja Sathe, Ferdinand Guerth, Anna-Katharina Seitz, Matthias M Heck, Tobias Maurer, Sarah M Schwarzenböck, Bernd J Krause, Wolfgang A Schulz, Robert Stoehr, Jürgen E Gschwend, Margitta Retz, Roman Nawroth
PURPOSE: To analyze the contribution of Wnt signaling pathway to bladder cancer growth in order to identify suitable target molecules for therapy. MATERIAL AND METHODS: Expression of Wnt 2/4/7, LRP5/6, TCF1/2/4, LEF-1, and β-actin was detected by reverse transcription polymerase chain reaction in a panel of 9 and for Wntless (WLS) in 17 bladder cancer cell lines. Protein expression of WLS was detected in 6 cell lines. Wnt/β-catenin activity was analyzed using the TOPflash/FOPflash luciferase reporter assay...
May 10, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28493902/circulating-levels-of-sclerostin-but-not-dkk1-associate-with-laboratory-parameters-of-ckd-mbd
#5
Geert J Behets, Liesbeth Viaene, Björn Meijers, Frank Blocki, Vincent M Brandenburg, Anja Verhulst, Patrick C D'Haese, Pieter Evenepoel
INTRODUCTION: Mounting evidence indicates that a disturbed Wnt-β-catenin signaling may be involved in the pathogenesis of chronic kidney disease-mineral and bone and mineral disorder (CKD-MBD). Data on the impact of CKD on circulating levels of the Wnt antagonists sclerostin and Dickkopf related protein 1 (DKK1) and the relationship with laboratory parameters of CKD-MBD are incomplete. METHODS: We analyzed serum sclerostin and DKK1 in 308 patients across the stages of chronic kidney disease (kDOQI stage 1-2 n = 41; CKD stage 3 n = 54; CKD stage 4-5 n = 54; hemodialysis n = 100; peritoneal dialysis n = 59) as well as in 49 healthy controls...
2017: PloS One
https://www.readbyqxmd.com/read/28492360/resveratrol-inhibits-periodontitis-related-bone-loss-in-rats-submitted-to-cigarette-smoke-inhalation
#6
Fernanda V Ribeiro, Danilo S Pino, Felipe C Franck, Bruno B Benatti, Howard Tenenbaum, Dip Perio, John E Davies, Suzana P Pimentel, Renato C Casarin, Fabiano R Cirano, Marcio Z Casati
BACKGROUND: Alternative therapeutic approaches have been explored in order to modulate the host's response to periodontal disease. The knowledge of new strategies to treat periodontitis is particularly relevant in patients presenting augmented risk to periodontitis, as smokers. The aim of this study was to investigate the impact of Resveratrol (RESV) on the progression of experimental periodontitis (EP) in the presence of cigarette smoke inhalation (CSI). METHODS: Rats were assigned to: CSI+RESV(n=20); CSI+placebo(n=20); Non-CSI(n=20)...
May 11, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28470144/dkk3-overexpression-increases-malignant-properties-of-head-and-neck-squamous-cell-carcinoma-cells
#7
Naoki Katase, Shin-Ichiro Nishimatsu, Akira Yamauchi, Masahiro Yamamura, Kumiko Terada, Masumi Itadani, Naoko Okada, Nur Mohammad Monsur Hassan, Hitoshi Nagatsuka, Tohru Ikeda, Tsutomu Nohno, Shuichi Fujita
DKK3, a member of dickkopf WNT signaling pathway inhibitor family, is believed to be a tumor suppressor, because of itsreduced expression in cancer cells. However, our previous studies have revealed that DKK3 expression is predominantly observed in head and neck, and oral squamous cell carcinoma (HNSCC/OSCC). Interestingly, HNSCC/OSCC patients with DKK3 expression showed high metastasis rate and poorer survival, and siRNA-mediated knockdown of DKK3 in HNSCC-derived cancer cell lines resulted in reduced cellular migration and invasion...
May 4, 2017: Oncology Research
https://www.readbyqxmd.com/read/28467796/dickkopf-related-protein-2-induces-g0-g1-arrest-and-apoptosis-through-suppressing-wnt-%C3%AE-catenin-signaling-and-is-frequently-methylated-in-breast-cancer
#8
Junhao Mu, Tianli Hui, Bianfei Shao, Lili Li, Zhenfang Du, Li Lu, Lin Ye, Shuman Li, Qianqian Li, Qian Xiao, Zhu Qiu, Yan Zhang, Jiangxia Fan, Guosheng Ren, Qian Tao, Tingxiu Xiang
Dickkopf-related protein 2 (DKK2) is one of the antagonists of Wnt/β-catenin signaling, with its downregulation reported in multiple cancers. However, how DKK2 contributes to breast tumorigenesis remains unclear. We examined its expression and promoter methylation in 10 breast tumor cell lines, 98 primary tumors, and 21 normal breast tissues. Compared with normal tissues, DKK2 was frequently silenced in breast cell lines (7/8). DKK2 promoter methylation was detected in 77.8% of cell lines and 86.7% of breast tumors; while rarely detected in normal breast tissues (19%), indicating common DKK2 methylation in breast cancer...
April 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28455497/decreased-circulating-levels-of-dickkopf-1-in-patients-with-exudative-age-related-macular-degeneration
#9
Fangfang Qiu, Zhen Liu, Yueping Zhou, Jia He, Songjian Gong, Xue Bai, Yingxia Zeng, Zuguo Liu, Jian-Xing Ma
Aberrant activation of the Wnt/β-catenin signaling pathway plays a pathogenic role in retinal inflammation and neovascularization. Here, we investigated whether circulating levels of Dickkopf-1 (DKK-1), a specific inhibitor of this pathway, are altered in patients with exudative age-related macular degeneration (AMD). Plasma was obtained from 128 patients with exudative AMD, 46 patients with atrophic AMD and 111 healthy controls. DKK-1 levels in plasma were measured using ELISA, and data analyzed with one-way ANOVA, logistic regression analysis and receiver-operating characteristic analysis (ROC)...
April 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28451870/association-between-serum-and-synovial-fluid-dickkopf-1-levels-with-radiographic-severity-in-primary-knee-osteoarthritis-patients
#10
Theologis Thomas, Efstathopoulos Nikolaos, Nikolaou Vasileios, Charikopoulos Ioannis, Papapavlos Ioannis, Kokkoris Panayiotis, Papatheodorou Athanasios, Nasiri-Ansari Narjes, Kassi Eva
Primary knee osteoarthritis (OA) contributes to disability among middle-aged and elderly people. Dickkopf-1 (Dkk-1) and sclerostin are inhibitors of Wnt/β-catenin signaling pathway implicated in regulation of cartilage homeostasis and bone formation, respectively. We aim to investigate the association between the serum(s) and synovial fluid (SF) Dkk-1 and sclerostin levels and disease severity in patients with primary knee OA. Forty patients aged 56-87 years with primary knee OA and 20 healthy individuals were recruited...
April 27, 2017: Clinical Rheumatology
https://www.readbyqxmd.com/read/28447744/cyclic-compression-stimulates-osteoblast-differentiation-via-activation-of-the-wnt-%C3%AE-catenin-signaling-pathway
#11
Xi Chen, Jianmin Guo, Yu Yuan, Zhongguang Sun, Binglin Chen, Xiaoyang Tong, Lingli Zhang, Chao Shen, Jun Zou
It is widely accepted that mechanical stress is an important factor in bone associated cell differentiation, including that of mesenchymal stem cells, osteoblasts and osteocytes. The present study aimed to determine the effect of mechanical cyclic compressive load on osteoblast differentiation, and whether this was associated with activation of the wingless‑type (Wnt)/β-catenin signaling pathway. Using a 3D scaffold model, MC3T3‑E1 cells were exposed to cyclic compressive loading via the Flexcell‑5000C™ Compression system...
May 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28438716/yap1-negatively-regulates-chondrocyte-differentiation-partly-by-activating-the-%C3%AE-catenin-signaling-pathway
#12
Beining Yang, Hualing Sun, Fangfang Song, Miao Yu, Yanru Wu, Jiawei Wang
YAP1 (Yes-associated protein 1) transcriptional coactivator is a downstream gene of the Hippo signaling pathway, which controls cell proliferation and differentiation. YAP1 plays a significant role in the regulation of cartilage and bone development. However, the molecular mechanism by which YAP1 regulates chondrocyte differentiation remains to be elucidated. Immunofluorescent staining was used to visualize the localization of YAP1 expression in the mouse chondroprogenitor ATDC5 cell line. ATDC5 cells with lentivirus-vector-mediated YAP1 overexpression and knockdown were established...
April 21, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28423208/combined-activity-of-temozolomide-and-the-mtor-inhibitor-temsirolimus-in-metastatic-melanoma-involves-dkk1
#13
Heike Niessner, Corinna Kosnopfel, Tobias Sinnberg, Daniela Beck, Kathrin Krieg, Ines Wanke, Konstantinos Lasithiotakis, Michael Bonin, Claus Garbe, Friedegund Meier
The BRAFV600E inhibitor vemurafenib achieves remarkable clinical responses in patients with BRAF-mutant melanoma, but its effects are limited by the onset of drug resistance. In the case of resistance, chemotherapy can still be applied as second line therapy. However, it yields low response rates and strategies are urgently needed to potentiate its effects. In a previous study, we showed that the inhibition of the PI3K-AKT-mTOR pathway significantly increases sensitivity of melanoma cells to chemotherapeutic drugs (1)...
April 19, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28396299/plasma-cytokine-profiling-to-predict-susceptibility-to-acute-mountain-sickness
#14
Hui Lu, Rong Wang, Wenbin Li, Hua Xie, Chang Wang, Ying Hao, Yuhuan Sun, Zhengping Jia
Extensive studies have been performed on acute mountain sickness (AMS), but biomarkers predicting AMS are lacking. Presently, the mainstay methods to identify AMS biomarkers include proteomic and genetic methods at high altitudes or in hypoxic simulated chambers. In the present study, we compared plasma cytokine profiles between AMS-susceptible individuals and AMS-resistant individuals at low altitude by cytokine array analysis. In total, 75 differentially expressed cytokines were identified between AMS-susceptible individuals and AMS-resistant individuals, most involved in inflammation...
November 1, 2016: European Cytokine Network
https://www.readbyqxmd.com/read/28388723/high-sclerostin-and-dickkopf-1-dkk-1-serum-levels-in-children-and-adolescents-with-type-1-diabetes-mellitus
#15
Maria Felicia Faienza, Annamaria Ventura, Maurizio Delvecchio, Anna Fusillo, Laura Piacente, Gabriella Aceto, Graziana Colaianni, Silvia Colucci, Luciano Cavallo, Maria Grano, Giacomina Brunetti
Context: Childhood type 1 diabetes mellitus (T1DM) is associated with decreased bone mass. Sclerostin and dickkopf-1 (DKK-1) are Wnt inhibitors that regulate bone formation. Objective: To evaluate sclerostin and DKK-1 levels in T1DM children and to analyze the influence of glycemic control on bone health. Design and setting: Cross-sectional study conducted at a clinical research center. Participants: One hundred and six T1DM subjects (12...
April 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28384913/study-of-dickkopf-1-dkk-1-gene-expression-in-hepatocellular-carcinoma-patients
#16
Mona Watany, Rehab Badawi, Walaa Elkhalawany, Sherief Abd-Elsalam
INTRODUCTION: Hepatocellular Carcinoma (HCC) is the sixth most common cancer in the world. Dickkopf -1 (DKK-1) protein is a new biomarker used in conjunction with Alpha Fetoprotein (AFP) to differentiate HCC from "non-malignant" liver disease. DKK-1 is an inhibitor of Wnt/β-catenin signaling pathway which is involved in embryogenesis and has been implicated in tumorigenesis in many tissues. AIM: To investigate the level of DKK-1 gene expression in the peripheral blood of patients with HCC who had a history of Hepatitis C Virus (HCV) and schistosomal infections...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28373995/dickkopf-1-is-a-biomarker-for-systemic-lupus-erythematosus-and-active-lupus-nephritis
#17
Jing Xue, Jiali Yang, Lijuan Yang, Shaolan Zhou, Chen Ji, Xuemei Wang, Nan Yu, Xiaoming Liu, Shuhong Chi
An early diagnosis of lupus nephritis (LN) has an important clinical implication in guiding treatments of systemic lupus erythematosus (SLE) in clinical settings. In this study, the concentrations of Wnt-3A, Frizzled-8 (FZD-8), and Dickkopf-1 (DKK-1) of Wnt signaling, as well as their diagnostic values for accessing LN, were evaluated by ELISA in sera and urine of 111 SLE patients (31 with LN and 80 without LN) and 70 healthy cohorts. Significantly more abundances of DKK-1 protein were determined in both of sera and urine of SLE patients compared to healthy cohorts (p < 0...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28365691/dickkopf-related-protein-2-is-epigenetically-inactivated-and-suppresses-colorectal-cancer-growth-and-tumor-metastasis-by-antagonizing-wnt-%C3%AE-catenin-signaling
#18
Can Wang, Yujuan Yue, Bianfei Shao, Zhu Qiu, Junhao Mu, Jun Tang, Xiaofan Han, Tingxiu Xiang, Guosheng Ren
BACKGROUND/AIMS: Aberrant activation of the Wnt/β-catenin signaling pathway plays a key role in the pathogenesis of multiple tumors including digestive cancers. Recent studies have reported that Dickkopf-related protein 2 (DKK2) is epigenetically inactivated in numerous types of cancers and that its gene products exhibit tumor-suppressive properties. However, the biological functions and underlying molecular mechanisms of DKK2 in colon carcinoma remains obscure. METHODS: We examined the expression of DKK2 in colon tumor cell lines by RT-PCR and its promoter methylation status in colon tumor cell lines and primary tumors by methylation-specific PCR (MSP)...
March 30, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28358733/plasma-dickkopf-related-protein-1-an-antagonist-of-the-wnt-pathway-is-associated-with-hiv-associated-neurocognitive-impairment
#19
Chunjiang Yu, Melanie Seaton, Scott Letendre, Robert Heaton, Lena Al-Harthi
OBJECTIVE: DKK1 is a soluble antagonist of the Wnt pathway. It binds to and sequesters LRP5/6 away from Wnts. Because the Wnt pathway regulates synaptic transmission and plasticity, we hypothesized that increased DKK1 would increase the risk for neurocognitive impairment (NCI) in HIV+ individuals. We evaluated here the relationship between plasma DKK1 and global NCI. METHODS: Plasma samples and data from 41 HIV+ and 42 HIV- adults were obtained from the University of California, San Diego...
March 29, 2017: AIDS
https://www.readbyqxmd.com/read/28356931/microrna-320a-downregulation-mediates-human-liver-cancer-cell-proliferation-through-the-wnt-%C3%AE-catenin-signaling-pathway
#20
Caicheng Lu, Zengwei Liao, Minxian Cai, Guirong Zhang
MicroRNAs (miRs) have emerged as key epigenetic regulators involved in cancer progression. miR-320a has been demonstrated to be a novel tumor suppressive microRNA in several types of cancers. In the present study, the role of miR-320a in human hepatocellular carcinoma (HCC) was investigated. The expression levels of miR-320a and messenger RNA were determined by reverse transcription-quantitative polymerase chain reaction, while cell cycle and cell apoptosis were analyzed by flow cytometry. The cell proliferative ability was determined by Cell Counting Kit-8 assay and colony formation assay...
February 2017: Oncology Letters
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