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https://www.readbyqxmd.com/read/28717879/comparison-of-the-effect-of-activated-or-non-activated-prp-in-various-concentrations-on-osteoblast-and-fibroblast-cell-line-proliferation
#1
Surena Vahabi, Zahra Yadegari, Hossein Mohammad-Rahimi
Platelet-rich plasma (PRP) contains growth factors which positively affect cell proliferation, cell differentiation, chemotaxis and intracellular matrix synthesis. All these processes are involved in wound healing and tissue regeneration; thus, PRP as a source of growth factors can be used in periodontal regenerative therapies. The purpose of the present study was to assess the effect of various concentrations of activated and non-activated PRP on proliferation of osteoblasts and fibroblasts in vitro. PRP was obtained from three healthy volunteers...
July 17, 2017: Cell and Tissue Banking
https://www.readbyqxmd.com/read/28716720/met-signaling-mediates-intestinal-crypt-villus-development-regeneration-and-adenoma-formation-and-is-promoted-by-stem-cell-cd44-isoforms
#2
Sander P J Joosten, Jurrit Zeilstra, Harmen van Andel, R Clinton Mijnals, Joost Zaunbrecher, Annet A M Duivenvoorden, Marc van de Wetering, Hans Clevers, Marcel Spaargaren, Steven T Pals
BACKGROUND & AIMS: Resistance of metastatic human colorectal cancer cells to drugs that block epidermal growth factor receptor (EGFR) signaling could be caused by aberrant activity of other receptor tyrosine kinases, activating overlapping signaling pathways. One of these receptor tyrosine kinases could be MET, the receptor for hepatocyte growth factor (HGF). We investigated how MET signaling, and its interaction with CD44 (a putative MET co-receptor regulated by Wnt signaling and highly expressed by intestinal stem cells [ISCs] and adenomas) affects intestinal homeostasis, regeneration, and adenoma formation in mini-gut organoids and mice...
July 14, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28716525/peri-tumor-associated-fibroblasts-promote-intrahepatic-metastasis-of-hepatocellular-carcinoma-by-recruiting-cancer-stem-cells
#3
Jinghua Jiang, Fei Ye, Xue Yang, Chen Zong, Lu Gao, Yang Yang, Qiudong Zhao, Zhipeng Han, Lixin Wei
Fibroblasts have been reported to play an important role in hepatocellular carcinoma (HCC). However, the role of fibroblasts have not been fully understood. Conditioned medium collected from human peri-tumor tissue-derived fibroblasts (CM-pTAFs) showed high metastasis ability than human HCC tissues-derived fibroblasts (CM-TAFs). To determine what component was secreted from fibroblasts, we used Bio-Plex analysis system and compared the factors secreted from CM-pTAFs and CM-TAFs, found a series of up-regulated cytokines in the CM-pTAFs, including IL-6, CCL2, CXCL1, CXCL8, SCGF-β, HGF and VEGF...
July 14, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28713640/human-adipose-derived-mesenchymal-stem-cells-respond-to-short-term-hypoxia-by-secreting-factors-beneficial-for-human-islets-in-vitro-and-potentiate-antidiabetic-effect-in-vivo
#4
Simen W Schive, Mohammad Reza Mirlashari, Grete Hasvold, Mengyu Wang, Dag Josefsen, Hans Petter Gullestad, Olle Korsgren, Aksel Foss, Gunnar Kvalheim, Hanne Scholz
Adipose-derived mesenchymal stem cells (ASCs) release factors beneficial for islets in vitro and protect against hyperglycemia in rodent models of diabetes. Oxygen tension has been shown to induce metabolic changes and alter ASCs' release of soluble factors. The effects of hypoxia on the antidiabetic properties of ASCs have not been explored. To investigate this, we incubated human ASCs for 48 h in 21% (normoxia) or 1% O2 (hypoxia) and compared viability, cell growth, surface markers, differentiation capability, and soluble factors in the conditioned media (CM)...
2017: Cell Medicine
https://www.readbyqxmd.com/read/28711237/precise-role-of-dermal-fibroblasts-on-melanocyte-pigmentation
#5
REVIEW
Yinjuan Wang, Céline Viennet, Sophie Robin, Jean-Yves Berthon, Li He, Philippe Humbert
Dermal fibroblasts are traditionally recognized as synthesizing, remodeling and depositing collagen and extracellular matrix, the structural framework for tissues, helping to bring thickness and firmness to the skin. However, the role of fibroblasts on skin pigmentation arouses concern recently. More is known about the interactions between epidermal melanocytes and keratinocytes. This review highlights the importance of fibroblast-derived melanogenic paracrine mediators in the regulation of melanocyte activities...
July 1, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28708099/role-played-by-signalling-pathways-in-overcoming-braf-inhibitor-resistance-in-melanoma
#6
REVIEW
Xian Yang Chan, Alamdeep Singh, Narin Osman, Terrence J Piva
The discovery of the BRAF(V600E) mutation led to the development of vemurafenib (PLX4032), a selective BRAF inhibitor specific to the kinase, for the treatment of metastatic melanomas. However, initial success of the drug was dampened by the development of acquired resistance. Melanoma was shown to relapse in patients following treatment with vemurafenib which eventually led to patients' deaths. It has been proposed that mechanisms of resistance can be due to (1) reactivation of the mitogen-activated protein kinase (MAPK) signalling pathway via secondary mutations, amplification or activation of target kinase(s), (2) the bypass of oncogenic pathway via activation of alternative signalling pathways, (3) other uncharacterized mechanisms...
July 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28706234/investigation-of-brain-tissue-infiltration-by-medulloblastoma-cells-in-an-ex-vivo-model
#7
Anuja Neve, Karthiga Santhana Kumar, Dimitra Tripolitsioti, Michael A Grotzer, Martin Baumgartner
Medulloblastoma (MB) is a paediatric cancer of the cerebellum that can develop cerebellar and leptomeningeal metastases. Local brain tissue infiltration, the underlying cause of metastasis and relapse, remains unexplored. We developed a novel approach to investigate tissue infiltration of MB using organotypic cerebellum slice culture (OCSC). We show that cellular and structural components of cerebellar tissue in OCSCs are maintained for up to 30 days ex vivo, and that OCSCs foster tumour growth and cell proliferation...
July 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28706139/a-phase-i-study-of-foretinib-plus-erlotinib-in-patients-with-previously-treated-advanced-non-small-cell-lung-cancer-canadian-cancer-trials-group-ind-196
#8
Natasha B Leighl, Ming-Sound Tsao, Geoffrey Liu, Dongsheng Tu, Cheryl Ho, Frances A Shepherd, Nevin Murray, John R Goffin, Garth Nicholas, Shingo Sakashita, Zhuo Chen, Lucia Kim, Jean Powers, Lesley Seymour, Glenwood Goss, Penelope A Bradbury
PURPOSE: MET and AXL mediate resistance to EGFR TKI in NSCLC. Foretinib, a MET/RON/AXL/TIE-2/VEGFR kinase inhibitor may overcome EGFR kinase resistance. This dose escalation study combined foretinib and erlotinib in advanced pretreated NSCLC patients. EXPERIMENTAL DESIGN: The primary endpoint was to define the RP2D of foretinib plus erlotinib as continuous oral daily dosing. Secondary objectives included safety, pharmacokinetics, response and potential biomarkers of response including EGFR, KRAS genotype, MET, AXL expression, and circulating HGF levels...
June 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28696366/role-and-therapeutic-targeting-of-the-hgf-met-pathway-in-glioblastoma
#9
REVIEW
Nichola Cruickshanks, Ying Zhang, Fang Yuan, Mary Pahuski, Myron Gibert, Roger Abounader
Glioblastoma (GBM) is a lethal brain tumor with dismal prognosis. Current therapeutic options, consisting of surgery, chemotherapy and radiation, have only served to marginally increase patient survival. Receptor tyrosine kinases (RTKs) are dysregulated in approximately 90% of GBM; attributed to this, research has focused on inhibiting RTKs as a novel and effective therapy for GBM. Overexpression of RTK mesenchymal epithelial transition (MET), and its ligand, hepatocyte growth factor (HGF), in GBM highlights a promising new therapeutic target...
July 11, 2017: Cancers
https://www.readbyqxmd.com/read/28690299/optical-coherence-tomography-assessment-of-glucose-fluctuation-impact-on-the-neointimal-proliferation-after-stent-implantation-in-a-diabetic-hypercholesterolemic-swine-model
#10
Jinggang Xia, Yang Qu, Chunlin Yin, Dong Xu
The aim of the present study was to investigate the effects of glucose fluctuation on neointimal proliferation after stent implantation by optical coherence tomography (OCT) in a diabetic/hypercholesterolemic (DM/HC) swine model.A total of 24 everolimus-eluting stents (EES) were implanted in the right coronary artery (RCA) of the animals using a 20% overstretch ratio. The 24 swines were divided into a DM-high glucose fluctuation (HGF) group (n = 8), DMlow glucose fluctuation (LGF) group (n = 8), and a control group (n = 8)...
July 10, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28688381/zeroth-order-regular-approximation-approach-to-electric-dipole-moment-interactions-of-the-electron
#11
Konstantin Gaul, Robert Berger
A quasi-relativistic two-component approach for an efficient calculation of P,T-odd interactions caused by a permanent electric dipole moment of the electron (eEDM) is presented. The approach uses a (two-component) complex generalized Hartree-Fock and a complex generalized Kohn-Sham scheme within the zeroth order regular approximation. In applications to select heavy-elemental polar diatomic molecular radicals, which are promising candidates for an eEDM experiment, the method is compared to relativistic four-component electron-correlation calculations and confirms values for the effective electric field acting on the unpaired electron for RaF, BaF, YbF, and HgF...
July 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28688148/adipose-derived-mesenchymal-stem-cells-therapy-for-acute-kidney-injury-induced-by-ischemia-reperfusion-in-a-rat-model
#12
Jian-Bo Zhang, Xiao-Qiao Wang, Guo-Lin Lu, Huan-Sen Huang, Shi-Yuan Xu
Acute kidney injury (AKI) represents a group of complicated syndromes with a high mortality rate. The administration of adipose-derived mesenchymal stem cells (ADMSCs) has been tested as a possible treatment method for AKI. The long-term evaluation of AKI induced by ischemia/reperfusion (IR) and the probable renal protection of ADMSCs are limited. In this study we have established a rat AKI model induced by IR and investigated the possible protective effects of ADMSCs. Adult Sprague-Dawley (SD) rats were divided into three groups (n=6/each group)...
July 8, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28687961/allogeneic-adipose-derived-mesenchymal-stem-cell-transplantation-enhances-the-expression-of-angiogenic-factors-in-a-mouse-acute-hindlimb-ischemic-model
#13
Ngoc Bich Vu, Ha Thi-Ngan Le, Thuy Thi-Thanh Dao, Lan Thi Phi, Ngoc Kim Phan, Van Thanh Ta
Cell migration and molecular mechanisms during healing of damaged vascular or muscle tissues are emerging fields of interest worldwide. The study herein focuses on evaluating the role of allogenic adipose-derived mesenchymal stem cells (ADMSCs) in restoring damaged tissues. Using a hindlimb ischemic mouse model, ADMSC-mediated induction of cell migration and gene expression related to myocyte regeneration and angiogenesis were evaluated. ADMSCs were labeled with GFP (ADMSC-GFP). The proximal end of the femoral blood vessel of mice (over 6 months of age) are ligated at two positions then cut between the two ties...
July 8, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28686854/rest-final-exon-truncating-mutations-cause-hereditary-gingival-fibromatosis
#14
Yavuz Bayram, Janson J White, Nursel Elcioglu, Megan T Cho, Neda Zadeh, Asuman Gedikbasi, Sukru Palanduz, Sukru Ozturk, Kivanc Cefle, Ozgur Kasapcopur, Zeynep Coban Akdemir, Davut Pehlivan, Amber Begtrup, Claudia M B Carvalho, Ingrid Sophie Paine, Ali Mentes, Kivanc Bektas-Kayhan, Ender Karaca, Shalini N Jhangiani, Donna M Muzny, Richard A Gibbs, James R Lupski
Hereditary gingival fibromatosis (HGF) is the most common genetic form of gingival fibromatosis that develops as a slowly progressive, benign, localized or generalized enlargement of keratinized gingiva. HGF is a genetically heterogeneous disorder and can be transmitted either as an autosomal-dominant or autosomal-recessive trait or appear sporadically. To date, four loci (2p22.1, 2p23.3-p22.3, 5q13-q22, and 11p15) have been mapped to autosomes and one gene (SOS1) has been associated with the HGF trait observed to segregate in a dominant inheritance pattern...
July 6, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28686204/metabolic-and-blood-pressure-effects-of-walnut-supplementation-in-a-mouse-model-of-the-metabolic-syndrome
#15
Nicola J A Scott, Leigh J Ellmers, Anna P Pilbrow, Lotte Thomsen, Arthur Mark Richards, Chris M Frampton, Vicky A Cameron
There is extensive evidence that walnut consumption is protective against cardiovascular disease and diabetes in the healthy population, but the beneficial effects of walnut consumption in individuals with the metabolic syndrome (MetS) remain uncertain. We compared a range of cardio-metabolic traits and related tissue gene expression associated with 21 weeks of dietary walnut supplementation in a mouse model of MetS (MetS-Tg) and wild-type (WT) mice (n = 10 per genotype per diet, equal males and females). Compared to standard diet, walnuts did not significantly alter food consumption or body weight trajectory of either MetS-Tg or WT mice...
July 7, 2017: Nutrients
https://www.readbyqxmd.com/read/28682476/plasma-levels-of-hgf-and-plgf-predict-mortality-in-a-general-population-a-prospective-cohort-study
#16
Kristiina Santalahti, Aki Havulinna, Mikael Maksimow, Tanja Zeller, Stefan Blankenberg, Aki Vehtari, Heikki Joensuu, Sirpa Jalkanen, Veikko Salomaa, Marko Salmi
BACKGROUND: Circulating levels of growth factors involved in leukocyte production and angiogenesis could be indicative of underlying aberrations of tissue homeostasis and therefore be utilized as predictors of risk for all-cause cardiovascular disease (CVD) or cancer mortality. METHODS: Baseline plasma levels of a range of growth factors were measured in two cohorts of the population-based FINRISK study (1997 Discovery cohort, N=8444, aged 25-74; 2002 Replication cohort, N=2951, aged 51-74 years) using a multiplexed bead array methodology and ELISA...
July 6, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28682474/autologous-serum-supplement-favours-in-vitro-regenerative-paracrine-factors-synthesis
#17
Nazmul Haque, Noor Hayaty Abu Kasim, Noor Lide Abu Kassim, Mohammad Tariqur Rahman
OBJECTIVES: Foetal bovine serum (FBS) is often the serum supplement of choice for in vitro human cell culture. This study compares the effect of FBS and autologous human serum (AuHS) supplement in human peripheral blood mononuclear cell (PBMC) culture to prepare secretome. MATERIALS AND METHODS: The PBMC (n = 7) were cultured either in RPMI-1640 containing L-glutamine and 50 units/ml Penicillin-Streptomycin (BM) or in BM with either AuHS or FBS. Viability, proliferation and differentiation of PBMC were evaluated...
July 6, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28682294/proteomic-comparison-of-amnion-and-chorion-and-evaluation-of-the-effects-of-processing-on-placental-membranes
#18
John P McQuilling, Jeremy B Vines, Kelly A Kimmerling, Katie C Mowry
OBJECTIVE: The purpose of this study is to compare the growth factor and cytokine content found within the amnion and chorion layers and to determine the effects of dehydration on them. MATERIALS AND METHODS: Placentas were collected from 5 to 6 consented donors following elective cesarean section, and 1-cm2 sections of either amnion or chorion were immediately stored at -80°C or dehydrated prior to -80°C storage until proteomic analysis. Signaling molecules from tissue samples were evaluated using quantitative multiplex proteomics microarrays, and data were analyzed based on a per cm2 basis and also on pg/mg of extracted protein for potency...
June 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/28680554/characterization-and-antimicrobial-efficacy-of-portland-cement-impregnated-with-silver-nanoparticles
#19
Ki Young Nam
PURPOSE: This study investigated the effects of silver nanoparticle (SN) loading into hydraulic calcium silicate-based Portland cement on its mechanical, antibacterial behavior and biocompatibility as a novel dental bone substitute. MATERIALS AND METHODS: Chemically reduced colloidal SN were combined with Portland cement (PC) by the concentrations of 0 (control), 1.0, 3.0, and 5.0 wt%. The physico-mechanical properties of silver-Portland cement nanocomposites (SPNC) were investigated through X-ray diffraction (XRD), setting time, compressive strength, solubility, and silver ion elution...
June 2017: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28679425/overexpression-of-c-met-in-bone-marrow-mesenchymal-stem-cells-improves-their-effectiveness-in-homing-and-repair-of-acute-liver-failure
#20
Kun Wang, Yuwen Li, Tiantian Zhu, Yongting Zhang, Wenting Li, Wenyu Lin, Jun Li, Chuanlong Zhu
BACKGROUND: Transplantation of bone marrow-derived mesenchymal stem cells (BMSCs) has emerged as a novel therapy for acute liver failure (ALF). However, the homing efficiency of BMSCs to the injured liver sites appears to be poor. In this study, we aimed to determine if overexpression of c-Met in BMSCs could promote the homing ability of BMSCs to rat livers affected by ALF. METHODS: Overexpression of c-Met in BMSCs (c-Met-BMSCs) was attained by transfection of naive BMSCs with the lenti-c-Met-GFP...
July 5, 2017: Stem Cell Research & Therapy
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