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https://www.readbyqxmd.com/read/28087665/nkg2d-promotes-b1a-cell-development-and-protection-against-bacterial-infection
#1
Maja Lenartić, Vedrana Jelenčić, Biljana Zafirova, Mateja Ožanič, Valentina Marečić, Slaven Jurković, Veronika Sexl, Marina Šantić, Felix M Wensveen, Bojan Polić
NKG2D is a potent activating receptor that is expressed on cytotoxic immune cells such as CD8 T and NK cells, where it promotes cytotoxicity after binding stress ligands on infected or transformed cells. On NK cell precursors NKG2D modulates proliferation and maturation. Previously, we observed that NKG2D deficiency affects peripheral B cell numbers. In this study, we show that NKG2D regulates B1a cell development and function. We find that mice deficient for NKG2D have a strong reduction of B1a cell numbers...
January 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28073913/raf-kinases-are-essential-for-phosphate-induction-of-erk1-2-phosphorylation-in-hypertrophic-chondrocytes-and-normal-endochondral-bone-development
#2
Garyfallia Papaioannou, Elizabeth T Petit, Eva S Liu, Manuela Baccarini, Catrin Pritchard, Marie B Demay
Hypophosphatemia causes rickets by impairing hypertrophic chondrocyte apoptosis. Phosphate induction of Mek1/2;Erk1/2 phosphorylation in hypertrophic chondrocytes is required for phosphate-mediated apoptosis and growth plate maturation. Mek1/2 can be activated by numerous molecules including Raf isoforms. A- and B-Raf ablation in chondrocytes does not alter skeletal development while ablation of C-Raf decreases hypertrophic chondrocyte apoptosis and impairs vascularization of the growth plate. However, ablation of C-Raf does not impair phosphate-induced Erk1/2 phosphorylation in vitro, but leads to rickets by decreasing VEGF protein stability...
January 10, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28071724/osteoclastic-mir-214-targets-traf3-to-contribute-to-osteolytic-bone-metastasis-of-breast-cancer
#3
Jin Liu, Defang Li, Lei Dang, Chao Liang, Baosheng Guo, Cheng Lu, Xiaojuan He, Hilda Y S Cheung, Bing He, Biao Liu, Fangfei Li, Jun Lu, Luyao Wang, Atik Badshah Shaikh, Feng Jiang, Changwei Lu, Songlin Peng, Zongkang Zhang, Bao-Ting Zhang, Xiaohua Pan, Lianbo Xiao, Aiping Lu, Ge Zhang
The role of osteoclastic miRNAs in regulating osteolytic bone metastasis (OBM) of breast cancer is still underexplored. Here, we examined the expression profiles of osteoclastogenic miRNAs in human bone specimens and identified that miR-214-3p was significantly upregulated in breast cancer patients with OBM. Consistently, we found increased miR-214-3p within osteoclasts, which was associated with the elevated bone resorption, during the development of OBM in human breast cancer xenografted nude mice (BCX). Furthermore, genetic ablation of osteoclastic miR-214-3p in nude mice prevent the development of OBM...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28068493/bmp1-and-tll1-are-required-for-maintaining-periodontal-homeostasis
#4
J Wang, D Massoudi, Y Ren, A M Muir, S E Harris, D S Greenspan, J Q Feng
Mutations in bone morphogenetic protein 1 (BMP1) in humans or deletion of BMP1 and related protease tolloid like 1 (TLL1) in mice lead to osteogenesis imperfecta (OI). Here, we show progressive periodontal defects in mice in which both BMP1 and TLL1 have been conditionally ablated, including malformed periodontal ligament (PDL) (recently shown to play key roles in normal alveolar bone formation), significant loss in alveolar bone mass ( P < 0.01), and a sharp reduction in cellular cementum. Molecular mechanism studies revealed a dramatic increase in the uncleaved precursor of type I collagen (procollagen I) and a reduction in dentin matrix protein 1 (DMP1), which is partially responsible for defects in extracellular matrix (ECM) formation and mineralization...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28062298/ccl3-and-mmp-9-are-induced-by-tl1a-during-death-receptor-3-tnfrsf25-dependent-osteoclast-function-and-systemic-bone-loss
#5
Fraser L Collins, Jessica O Williams, Anja C Bloom, Ravinder K Singh, Lauren Jordan, Michael D Stone, Laura R McCabe, Eddie C Y Wang, Anwen S Williams
Reduced bone density and secondary osteoporosis, resulting in increased risk of fracture, is a significant complicating factor in the inflammatory arthritides. While the exact etiology of systemic bone loss is not fully elucidated, recent insights into the tumor necrosis factor super family (TNFSF) revealed a potential role for death receptor 3 (DR3/TNFRSF25) and one of its ligands, TNF-like protein 1A (TL1A/TNFSF15). The mechanisms by which DR3/TL1A signalling modulates bone loss are unclear. We investigated the effect of DR3/TL1A signalling upon osteoclast-dependent chemokine and MMP production to unravel novel mechanisms whereby this pathway regulates OC formation and OC-dependent bone resorption...
January 3, 2017: Bone
https://www.readbyqxmd.com/read/28052241/modeling-dynamics-and-function-of-bone-marrow-cells-in-mouse-liver-regeneration
#6
Elisa Pedone, Vlad-Aris Olteanu, Lucia Marucci, Maria Isabel Muñoz-Martin, Sameh A Youssef, Alain de Bruin, Maria Pia Cosma
In rodents and humans, the liver can efficiently restore its mass after hepatectomy. This is largely attributed to the proliferation and cell cycle re-entry of hepatocytes. On the other hand, bone marrow cells (BMCs) migrate into the liver after resection. Here, we find that a block of BMC recruitment into the liver severely impairs its regeneration after the surgery. Mobilized hematopoietic stem and progenitor cells (HSPCs) in the resected liver can fuse with hepatocytes, and the hybrids proliferate earlier than the hepatocytes...
January 3, 2017: Cell Reports
https://www.readbyqxmd.com/read/28047581/su-g-jep2-01-a-new-approach-for-mr-only-treatment-planning-tissue-segmentation-based-pseudo-ct-generation-using-t1-weighted-mri
#7
H Yu, Y Lee, B Chugh, C Tseng, M Campbell, K Leszczynski, A Sahgal
PURPOSE: To evaluate MR-only treatment planning for brain Stereotactic Ablative Radiotherapy (SABR) based on pseudo-CT (pCT) generation using one set of T1-weighted MRI. METHODS: T1-weighted MR and CT images from 12 patients who were eligible for brain SABR were retrospectively acquired for this study. MR-based pCT was generated by using a newly in-house developed algorithm based on MR tissue segmentation and voxel-based electron density (ED) assignment (pCTv). pCTs using bulk density assignment (pCTb where bone and soft tissue were assigned 800HU and 0HU,respectively), and water density assignment (pCTw where all tissues were assigned 0HU) were generated for comparison of ED assignment techniques...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045610/evolving-treatment-of-oligometastatic-hormone-sensitive-prostate-cancer
#8
Jessica M Clement, Christopher J Sweeney
Oligometastatic disease was postulated by Hellman and Weichselbaum in 1995 to be a disease state that may reflect a time point in the malignant process that may be amenable to local therapies to allow for patients to achieve a durable response or possible cure despite having advanced disease. Aggressive metastasis-directed therapy has been used in malignancies such as renal cell carcinoma, non-small-cell lung cancer, and colorectal cancer with some evidence of long-term benefit in selected patients. Recently, it has been proposed that some men with oligometastatic hormone-sensitive prostate cancer may also benefit from metastasis-directed therapy...
January 3, 2017: Journal of Oncology Practice
https://www.readbyqxmd.com/read/28034477/percutane-image-guided-cryoablation-of-painful-osseous-metastases-a-retrospective-single-center-review
#9
Tatum A McArthur, Carl A Narducci, Phillip H Lander, Robert Lopez-Ben
PURPOSE: Painful osseous metastases are a common problem in patients with malignancy, and they can be associated with significant morbidity owing to immobility, pain, pathologic fracture, or neurovascular compromise or all of these. We retrospectively evaluated pain levels and tumor enhancement in patients who underwent palliative percutaneous cryoablation for painful bone metastasis. METHODS: In this institutional review board-approved, health insurance portability and accountability act-compliant study, we retrospectively searched our department׳s picture archiving system for patients who underwent computed tomography (CT)-guided percutaneous cryoablation for treatment of painful metastatic osseous disease over a 6-year period (1/1/2005-12/31/2011)...
November 10, 2016: Current Problems in Diagnostic Radiology
https://www.readbyqxmd.com/read/28007329/feasibility-of-real-time-intraprocedural-temperature-control-during-bone-metastasis-thermal-microwave-ablation-a-bicentric-retrospective-study
#10
Adrian Kastler, Alexandre Krainik, Linda Sakhri, Mireille Mousseau, Bruno Kastler
PURPOSE: To evaluate feasibility of using a thermocouple for temperature monitoring during microwave (MW) ablation of metastatic bone disease. MATERIALS AND METHODS: This retrospective study comprised 16 patients (8 men with mean age 63 y and 8 women with mean age 59 y) with 18 bone metastases treated with MW ablation using a thermocouple between March 2012 and October 2015. The mean maximum tumor size was 29.5 mm. MW ablation power was set between 15 W and 40 W and applied for 1-6 minutes...
December 19, 2016: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28002870/radiofrequency-ablation-of-osteoid-osteoma-difficult-to-reach-places
#11
Ambrose J Huang
Osteoid osteomas are small painful benign bone tumors that can be effectively treated by radiofrequency ablation (RFA) in most situations. This article briefly reviews the typical imaging findings of osteoid osteomas and the RFA technique used to treat them at our institution. It concludes with several examples of osteoid osteomas in difficult-to-reach places and the approaches used to access and treat them.
November 2016: Seminars in Musculoskeletal Radiology
https://www.readbyqxmd.com/read/28002869/percutaneous-ablation-in-painful-bone-tumors
#12
Anderanik Tomasian, Adam N Wallace, Travis J Hillen, Jack W Jennings
Percutaneous image-guided ablation has been shown to be safe and effective for the treatment of benign osseous lesions and has evolved into the treatment of metastatic lesions for both pain palliation and local tumor control. Ablation is increasingly becoming part of the treatment algorithm of painful bone lesions, requiring multidisciplinary input from radiation, surgical, and medical oncologists. Substantial pain reduction is often possible in those who have failed to benefit from conventional therapies such as systemic and radiation therapy...
November 2016: Seminars in Musculoskeletal Radiology
https://www.readbyqxmd.com/read/27998364/bone-healing-following-different-types-of-osteotomy-scanning-electron-microscopy-sem-and-three-dimensional-sem-analyses
#13
Marko Blaskovic, Dragana Gabrić, Nichola J Coleman, Ian J Slipper, Mitko Mladenov, Elizabeta Gjorgievska
The aim of the present study was to compare dynamics of the bone healing process after different types of osteotomies. In total, 24 Wistar rats were subjected to different types of osteotomy performed with standard steel bur, piezosurgery, contact, and non-contact Erbium:yttrium-aluminum-garnet (Er:YAG) laser ablation. The animals were randomly divided into four groups, to be euthanized immediately after the procedure, or at 1, 2, or 3 weeks after surgery. The obtained bone samples were analyzed by scanning electron microscopy (SEM)...
December 2016: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/27989650/phenotypic-characterization-of-grm1-crv4-mice-reveals-a-functional-role-for-the-type-1-metabotropic-glutamate-receptor-in-bone-mineralization
#14
Ilaria Musante, Deborah Mattinzoli, Lavinia Alexandra Otescu, Simone Bossi, Masami Ikehata, Chiara Gentili, Giuliana Cangemi, Cinzia Gatti, Laura Emionite, Piergiorgio Messa, Roberto Ravazzolo, Maria Pia Rastaldi, Daniela Riccardi, Aldamaria Puliti
Recent increasing evidence supports a role for neuronal type signaling in bone. Specifically glutamate receptors have been found in cells responsible for bone remodeling, namely the osteoblasts and the osteoclasts. While most studies have focused on ionotropic glutamate receptors, the relevance of the metabotropic glutamate signaling in bone is poorly understood. Specifically type 1 metabotropic glutamate (mGlu1) receptors are expressed in bone, but the effect of its ablation on skeletal development has never been investigated...
October 27, 2016: Bone
https://www.readbyqxmd.com/read/27981571/haematopoietic-prolyl-hydroxylase-1-deficiency-promotes-m2-macrophage-polarization-and-is-both-necessary-and-sufficient-to-protect-against-experimental-colitis
#15
Sophie Van Welden, Martine De Vos, Ben Wielockx, Simon J Tavernier, Melissa Dullaers, Sara Neyt, Benedicte Descamps, Lindsey Devisscher, Sarah Devriese, Lien Van den Bossche, Tom Holvoet, Ann Baeyens, Carmen Correale, Silvia D'Alessio, Christian Vanhove, Filip De Vos, Bruno Verhasselt, Georg Breier, Bart N Lambrecht, Sophie Janssens, Peter Carmeliet, Silvio Danese, Dirk Elewaut, Debby Laukens, Pieter Hindryckx
Prolyl hydroxylase domain-containing proteins (PHD) regulate the adaptation of cells to hypoxia. Pan-hydroxylase inhibition is protective in experimental colitis in which PHD1 plays a prominent role. However, it is currently unknown how PHD1 targeting regulates this protection and which cell type(s) are involved. Here we demonstrated that Phd1 deletion in endothelial and haematopoietic cells (Phd1(f/)(f) Tie2:cre) protected mice from dextran sulphate sodium (DSS)-induced colitis with reduced epithelial erosions, immune cell infiltration and colonic microvascular dysfunction, whereas the response of Phd2(f/+) Tie2:cre and Phd3(f/)(f) Tie2:cre mice to DSS was similar to their littermate controls...
December 16, 2016: Journal of Pathology
https://www.readbyqxmd.com/read/27979985/changes-in-muscle-fiber-contractility-and-extracellular-matrix-production-during-skeletal-muscle-hypertrophy
#16
Christopher L Mendias, Andrew J Schwartz, Jeremy A Grekin, Jonathan P Gumucio, Kristoffer B Sugg
Skeletal muscle can adapt to increased mechanical loads by undergoing hypertrophy. Transient reductions in whole muscle force production have been reported during the onset of hypertrophy, but contractile changes in individual muscle fibers have not previously been studied. Additionally, the extracellular matrix (ECM) stores and transmits forces from muscle fibers to tendons and bones, and determining how the ECM changes during hypertrophy is important in understanding the adaptation of muscle tissue as a whole to mechanical loading...
December 15, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27977039/thermal-conductivity-of-human-bone-in-cryoprobe-freezing-as-related-to-density
#17
Kyle E Walker, Todd Baldini, Bennie G Lindeque
Cryoprobes create localized cell destruction through freezing. Bone is resistant to temperature flow but is susceptible to freezing necrosis at warmer temperatures than tumor cells. Few studies have determined the thermal conductivity of human bone. No studies have examined conductivity as related to density. The study goal was to examine thermal conductivity in human bone while comparing differences between cancellous and cortical bone. An additional goal was to establish a relationship between bone density and thermal conductivity...
December 9, 2016: Orthopedics
https://www.readbyqxmd.com/read/27965305/bone-marrow-cell-trafficking-analyzed-by-89zr-oxine-positron-emission-tomography-in-a-murine-transplantation-model
#18
Kingsley O Asiedu, Sho Koyasu, Lawrence P Szajek, Peter L Choyke, Noriko Sato
PURPOSE: The success of hematopoietic stem cell transplantation (HSCT) depends on donor cell homing to the bone marrow (BM). However, there is no reliable method of noninvasively monitoring the kinetics and distribution of transferred cells. Using Zirconium-89 ((89)Zr)-oxine cell labeling combined with positron emission tomography (PET) imaging, we sought to visualize and quantify donor cell homing in a mouse BM transplantation model. EXPERIMENTAL DESIGN: The effect of (89)Zr-oxine labeling on BM cell viability and differentiation was evaluated in vitro...
December 13, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27956626/phosphorylation-of-the-mdm2-oncoprotein-by-the-c-abl-tyrosine-kinase-regulates-p53-tumor-suppression-and-the-radiosensitivity-of-mice
#19
Michael I Carr, Justine E Roderick, Hong Zhang, Bruce A Woda, Michelle A Kelliher, Stephen N Jones
The p53 tumor suppressor acts as a guardian of the genome by preventing the propagation of DNA damage-induced breaks and mutations to subsequent generations of cells. We have previously shown that phosphorylation of the Mdm2 oncoprotein at Ser394 by the ATM kinase is required for robust p53 stabilization and activation in cells treated with ionizing radiation, and that loss of Mdm2 Ser394 phosphorylation leads to spontaneous tumorigenesis and radioresistance in Mdm2(S394A) mice. Previous in vitro data indicate that the c-Abl kinase phosphorylates Mdm2 at the neighboring residue (Tyr393) in response to DNA damage to regulate p53-dependent apoptosis...
December 27, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27956622/%C3%AE-2-adrenergic-receptor-dependent-chemokine-receptor-2-expression-regulates-leukocyte-recruitment-to-the-heart-following-acute-injury
#20
Laurel A Grisanti, Christopher J Traynham, Ashley A Repas, Erhe Gao, Walter J Koch, Douglas G Tilley
Following cardiac injury, early immune cell responses are essential for initiating cardiac remodeling and tissue repair. We previously demonstrated the importance of β2-adrenergic receptors (β2ARs) in the regulation of immune cell localization following acute cardiac injury, with deficient leukocyte infiltration into the damaged heart. The purpose of this study was to investigate the mechanism by which immune cell-expressed β2ARs regulate leukocyte recruitment to the heart following acute cardiac injury...
December 27, 2016: Proceedings of the National Academy of Sciences of the United States of America
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