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https://www.readbyqxmd.com/read/29897015/a-bone-model-to-study-the-role-of-triggering-receptor-expressed-on-myeloid-cells-2-trem-2
#1
Eleonora Rossi, Eva Mracsko, Adam Papadimitropoulos, Nima Allafi, Dieter Reinhardt, Arne Mehrkens, Ivan Martin, Irene Knuesel, Arnaud Scherberich
Triggering receptor expressed on myeloid cells-2 (TREM-2), a transmembrane receptor expressed by macrophages, microglia and osteoclasts, plays a protective role in late-onset Alzheimer Disease (AD). To validate TREM-2 as a therapeutic target in AD, its potential secondary effect on bone homeostasis should be clarified. However, animal models and monolayer cultures of human cells were shown poorly predictive of TREM-2 function in human. Therefore, this study aimed to engineer a tridimensional in vitro model using human progenitors differentiated into osteoblasts and osteoclasts, recapitulating physiological bone homeostasis...
June 13, 2018: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/29866839/in-vitro-biomimetic-engineering-of-a-human-hematopoietic-niche-with-functional-properties
#2
Paul E Bourgine, Thibaut Klein, Anna M Paczulla, Takafumi Shimizu, Leo Kunz, Konstantinos D Kokkaliaris, Daniel L Coutu, Claudia Lengerke, Radek Skoda, Timm Schroeder, Ivan Martin
In adults, human hematopoietic stem and progenitor cells (HSPCs) reside in the bone marrow (BM) microenvironment. Our understanding of human hematopoiesis and the associated niche biology remains limited, due to human material accessibility and limits of existing in vitro culture models. The establishment of an in vitro BM system would offer an experimentally accessible and tunable platform to study human hematopoiesis. Here, we develop a 3D engineered human BM analog by recapitulating some of the hematopoietic niche elements...
June 4, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29862837/bioengineering-with-endothelial-progenitor-cells-improves-the-vascular-engraftment-of-transplanted-human-islets
#3
Liza Grapensparr, Gustaf Christoffersson, Per-Ola Carlsson
Pancreatic islets isolated for transplantation are disconnected from their vascular supply and need to establish a new functional network posttransplantation. Due to poor revascularization, prevailing hypoxia with correlating increased apoptosis rates in experimental studies can be observed for months posttransplantation. Endothelial progenitor cells (EPCs) are bone marrow-derived cells that promote neovascularization. The present study tested the hypothesis that EPCs, isolated from human umbilical cord blood, could be coated to human islet surfaces and be used to promote islet vascular engraftment...
January 1, 2018: Cell Transplantation
https://www.readbyqxmd.com/read/29845891/a-fluidic-culture-platform-for-spatially-patterned-cell-growth-differentiation-and-cocultures
#4
Josephine Lembong, Max J Lerman, Tami J Kingsbury, Curt I Civin, John P Fisher
Stem cell cultures within perfusion bioreactors, while efficient in obtaining cell numbers, often lack the similarity to native tissues and consequently cell phenotype. We develop a three-dimensional (3D)-printed fluidic chamber for dynamic stem cell culture, with emphasis on control over flow and substrate curvature in a 3D environment, two physiologic features of native tissues. The chamber geometry, consisting of an array of vertical cylindrical pillars, facilitates actin-mediated localization of human mesenchymal stem cells (hMSCs) within ~200 µm distance from the pillars, enabling spatial patterning of hMSCs and endothelial cells (ECs) in cocultures and subsequent modulation of calcium signaling between these two essential cell types in the bone marrow microenvironment...
May 30, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29737234/biofabricated-structures-reconstruct-functional-urinary-bladders-in-radiation-injured-rat-bladders
#5
Tetsuya Imamura, Mitsuru Shimamura, Teruyuki Ogawa, Tomonori Minagawa, Takashi Nagai, Sudha Silwal Gautam, Osamu Ishizuka
The ability to repair damaged urinary bladders through the application of bone marrow-derived cells is in the earliest stages of development. We investigated the application of bone marrow-derived cells to repair radiation-injured bladders. We used a three-dimensional (3D) bioprinting robot system to biofabricate bone marrow-derived cell structures. We then determined if the biofabricated structures could restore the tissues and functions of radiation-injured bladders. The bladders of female 10-week-old Sprague-Dawley (SD) rats were irradiated with 2-Gy once a week for 5 weeks...
May 8, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29703208/badge-a-synthetic-antagonist-for-ppar%C3%AE-prevents-steroid-related-osteonecrosis-in-a-rabbit-model
#6
Na Yuan, Jia Li, Meng Li, Wenchen Ji, Zhaogang Ge, Lihong Fan, Kunzheng Wang
BACKGROUND: It was indicated that inhibition of PPARγ probably represents a novel therapy for steroid-related osteonecrosis. In this study, we investigated the preventive effects of PPARγ inhibition on steroid-related osteonecrosis in a rabbit model. METHODS: Rabbits were randomly divided into three groups (normal group, model group and BADGE group). Osteonecrosis was induced in rabbits in the model group and the BADGE group. The BADGE group also received bisphenol a diglycidyl ether(BADGE), a PPARγ antagonist, for 6 weeks...
April 27, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29701006/nanotherapeutics-for-multiple-myeloma
#7
REVIEW
Alexander Zheleznyak, Monica Shokeen, Samuel Achilefu
Multiple myeloma (MM) is an age-related hematological malignancy with an estimated 30,000 new cases and 13,000 deaths per year. A disease of antibody-secreting malignant plasma B-cells that grow primarily in the bone marrow (BM), MM causes debilitating fractures, anemia, renal failure, and hypercalcemia. In addition to the abnormal genetic profile of MM cells, the permissive BM microenvironment (BMM) supports MM pathogenesis. Although advances in treatment options have significantly enhanced survival in MM patients, transient perfusion of small-molecule drugs in the BM does not provide sufficient residence to enhance MM cell-drug interaction, thus allowing some myeloma cells to escape the first line of treatment...
April 26, 2018: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/29668587/impact-of-bone-marrow-mononuclear-cells-therapy-on-left-ventricular-function-in-patients-with-st-elevated-myocardial-infarction-a-meta-analysis
#8
Chao Wang, Xiujiang Han, Yongjian Li, Boya Zhang
BACKGROUND: Bone marrow mononuclear cell (BMMNC) therapy has been used as an adjunctive treatment in patients with ST-elevated myocardial infarction (STEMI). However, the therapeutic efficacy of this approach remains controversial. The present meta-analysis is aimed to evaluate the impact of cell therapy on left ventricular function after STEMI. METHODS: We searched through PubMed and EMBASE databases till 2017 for all relevant publications using certain search terms...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29662787/steroid-associated-osteonecrosis-animal-model-in-rats
#9
Li-Zhen Zheng, Jia-Li Wang, Ling Kong, Le Huang, Li Tian, Qian-Qian Pang, Xin-Luan Wang, Ling Qin
Objective: Established preclinical disease models are essential for not only studying aetiology and/or pathophysiology of the relevant diseases but more importantly also for testing prevention and/or treatment concept(s). The present study proposed and established a detailed induction and assessment protocol for a unique and cost-effective preclinical steroid-associated osteonecrosis (SAON) in rats with pulsed injections of lipopolysaccharide (LPS) and methylprednisolone (MPS). Methods: Sixteen 24-week-old male Sprague-Dawley rats were used to induce SAON by one intravenous injection of LPS (0...
April 2018: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29576595/therapeutic-efficacy-of-autologous-non-mobilized-enriched-circulating-endothelial-progenitors-in-patients-with-critical-limb-ischemia-the-scelta-trial
#10
Francesco Liotta, Francesco Annunziato, Sergio Castellani, Maria Boddi, Brunetto Alterini, Giovanni Castellini, Benedetta Mazzanti, Lorenzo Cosmi, Manlio Acquafresca, Filippo Bartalesi, Beatrice Dilaghi, Walter Dorigo, Gabriele Graziani, Benedetta Bartolozzi, Guido Bellandi, Giulia Carli, Alessandro Bartoloni, Aaron Fargion, Filippo Fassio, Paolo Fontanari, Giancarlo Landini, Eleonora A M Lucente, Stefano Michelagnoli, Carolina Orsi Battaglini, Grazia Panigada, Clara Pigozzi, Valentina Querci, Veronica Santarlasci, Paola Parronchi, Nicola Troisi, Cristiana Baggiore, Paola Romagnani, Edoardo Mannucci, Riccardo Saccardi, Carlo Pratesi, Gianfranco Gensini, Sergio Romagnani, Enrico Maggi
BACKGROUND: The therapeutic efficacy of bone marrow mononuclear cells (BM-MNC) autotransplantation in critical limb ischemia (CLI) has been reported. Variable proportions of circulating monocytes express low levels of CD34 (CD14+ CD34low cells) and behave in vitro as endothelial progenitor cells (EPCs). The aim of the present randomized clinical trial was to compare the safety and therapeutic effects of enriched circulating EPCs (ECEPCs) with BM-MNC administration.Methods and Results:ECEPCs (obtained from non-mobilized peripheral blood by immunomagnetic selection of CD14+ and CD34+ cells) or BM-MNC were injected into the gastrocnemius of the affected limb in 23 and 17 patients, respectively...
May 25, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29569981/regulatory-t-cells-within-bone-marrow-derived-stem-cells-actively-confer-immunomodulatory-and-neuroprotective-effects-against-stroke
#11
Elliot G Neal, Sandra A Acosta, Yuji Kaneko, Xunming Ji, Cesario V Borlongan
Regulatory T-cells (Tregs ) may exert a neuroprotective effect on ischemic stroke by inhibiting both inflammation and effector T-cell activation. Transplantation of human bone marrow-derived stem cells (BMSCs) in ischemic stroke affords neuroprotection that results in part from the cells' anti-inflammatory property. However, the relationship between Tregs and BMSCs in treatment of ischemic stroke has not been fully elucidated. Here, we tested the hypothesis that Tregs within the BMSCs represent active mediators of immunomodulation and neuroprotection in experimental stroke...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29559604/-angiogenic-ability-of-3-different-tissues-derived-mesenchymal-stem-cells-on-endothelial-progenitor-cells
#12
Siqi Wang, Haiyuan Lu, Lamei Cheng
To compare the ability between bone marrow-derived mesenchymal stem cells (MSCs) (BM-MSCs) and adipose-derived MSCs (AD-MSCs) or umbilical cord-derived MSCs (UC-MSCs) on promotion of vessels formation and vessels stabilization relevant to the functions of EPCs.
 Methods: In vitro, co-culture blood vessel test was performed to compare the angiogenic ability between BM-MSCs, AD-MSCs or UC-MSCs. In vivo, angiogenic assay dependent on basement membrane matrix Matrigel and immunohistochemistry were performed to compare the ability of vessels formation functions between BM-MSCs and AD-MSCs or UC-MSCs...
February 28, 2018: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29545214/hybrid-quantitative-mri-using-chemical-shift-displacement-and-recovery-based-simultaneous-water-and-lipid-imaging-a-preliminary-study
#13
Naoki Ohno, Tosiaki Miyati, Shuto Suzuki, Hirohito Kan, Toshitaka Aoki, Yoshitaka Nakamura, Yuki Hiramatsu, Satoshi Kobayashi, Toshifumi Gabata
PURPOSE: To suppress olefinic signals and enable simultaneous and quantitative estimation of multiple functional parameters associated with water and lipid, we investigated a modified method using chemical shift displacement and recovery-based separation of lipid tissue (SPLIT) involving acquisitions with different inversion times (TIs), echo times (TEs), and b-values. MATERIALS AND METHODS: Single-shot diffusion echo-planar imaging (SSD-EPI) with multiple b-values (0-3000 s/mm2 ) was performed without fat suppression to separate water and lipid images using the chemical shift displacement of lipid signals in the phase-encoding direction...
March 12, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29532760/efficacy-and-safety-of-autologous-cell-based-therapy-in-patients-with-no-option-critical-limb-ischaemia-a-meta-analysis
#14
Fadilah S Abdul Wahid, Nor Azimah Ismail, Wan Fariza Wan Jamaludin, Nor Asiah Muhamad, Mohamad Azim Mohamad Idris, Nai Ming Lai
BACKGROUND: Revascularisation therapy is the current gold standard of care for critical limb ischemia (CLI), although a significant proportion of patients with CLI either are not fit for or do not respond well to this procedure. Recently, novel angiogenic therapies such as the use of autologous cellbased therapy (CBT) have been examined, but the results of individual trials were inconsistent. OBJECTIVE: To pool all published studies that compared the safety and efficacy of autologous CBT derived from different sources and phenotypes with non cell-based therapy (NCT) in CLI patients...
2018: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29529399/angiogenesis-in-peripheral-arterial-disease
#15
REVIEW
Chakradhari Inampudi, Emmanuel Akintoye, Tomo Ando, Alexandros Briasoulis
Peripheral arterial disease (PAD) refers to narrowing of the peripheral arteries and atherosclerosis is the most important cause. In patients with PAD, revascularization is the preferred therapeutic strategy; nonetheless several patients are not deemed candidates for it due to advanced disease or several comorbidities. The main target of therapeutic angiogenesis is to promote development of new arterial vessels and improve perfusion of ischemic tissue. Angiogenic growth factors such as vascular endothelial growth factor (VEGF), fibroblast growth factor (FGF), hepatocyte growth factor (HGF), administered intramuscularly or intra-arterially, have been shown to promote angiogenesis and development of collateral vasculature in preclinical studies...
March 9, 2018: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29421564/high-density-lipoprotein-mimicking-nanodiscs-carrying-peptide-for-enhanced-therapeutic-angiogenesis-in-diabetic-hindlimb-ischemia
#16
Hyun-Ji Park, Rui Kuai, Eun Je Jeon, Yoojin Seo, Youngmee Jung, James J Moon, Anna Schwendeman, Seung-Woo Cho
Therapeutic strategies using endogenous stem cell mobilizer can provide effective cell-free therapy for addressing various ischemic diseases. In particular, substance P (SP) exhibited therapeutic regeneration by facilitating mobilization of endogenous stem cells from bone marrow to the injured sites. However, its therapeutic effect has been limited due to short half-life and rapid degradation of administered SP peptides in vivo. Here we sought to develop high-density lipoprotein (HDL)-mimicking nanodiscs conjugated with SP (HDL-SP) in order to increase the in vivo half-life, bone marrow targeting, and therapeutic efficacy of SP for the treatment of diabetic peripheral ischemia...
April 2018: Biomaterials
https://www.readbyqxmd.com/read/29409311/effect-of-multiple-intraperitoneal-injections-of-human-bone-marrow-mesenchymal-stem-cells-on-cuprizone-model-of-multiple-sclerosis
#17
Mohsen Marzban, Kazem Mousavizadeh, Masoomeh Bakhshayesh, Nasim Vousooghi, Gelareh Vakilzadeh, Anahita Torkaman-Boutorabi
Background: Bone marrow mesenchymal stem cells (BM-MSCs) elicit neuroprotective effects, and their repair ability has been investigated in different experimental models. We aimed to investigate the effect of multiple i.p. BM-MSCs injections in the cuprizone model of multiple sclerosis in mice. Methods: Adult male C57BL/6 mice (n = 40) were fed a regular diet or a diet containing cuprizone (0.2% w/w) for 6 six weeks. Bone marrow samples were taken from patients with spinal cord injury...
February 7, 2018: Iranian Biomedical Journal
https://www.readbyqxmd.com/read/29399802/stem-cells-enhance-reperfusion-following-ischemia-validation-using-laser-speckle-imaging-in-predicting-tissue-repair
#18
Ya Hui Tang, R Will Thompson, Cherie-Ann Nathan, Jonathan Steven Alexander, Timothy Lian
OBJECTIVES: The lack of real-time assessment of vascular perfusion changes remains a major weakness in assessing the efficacy of bone marrow stromal cells (BMSC) therapeutic ischemia reperfusion (I/R) injury. This study provides for the first time the real-time in vivo perfusion monitoring in I/R mice with BMSC therapy. STUDY DESIGN: Animal model. METHODS: Surgically created cutaneous flaps perfused by the inferior epigastric vessels were subjected to 3...
February 5, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29395424/rationale-and-design-of-the-clinical-and-histologic-analysis-of-mesenchymal-stromal-cells-in-amputations-champ-trial-investigating-the-therapeutic-mechanism-of-mesenchymal-stromal-cells-in-the-treatment-of-critical-limb-ischemia
#19
S Keisin Wang, Linden A Green, Natalie A Drucker, Raghu L Motaganahalli, Andres Fajardo, Michael P Murphy
OBJECTIVE: Currently, there are no accepted nonsurgical therapies that improve the delivery of blood-derived nutrients to patients with critical limb ischemia. Here, we describe the ongoing phase 1/2 Clinical and Histologic Analysis of Mesenchymal Stromal Cells in AmPutations (CHAMP) trial, which will provide crucial evidence of the safety profile of mesenchymal stromal cells (MSCs) and explore their therapeutic mechanisms in the setting of critical limb ischemia requiring below-knee amputation (BKA)...
January 30, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29380818/renin-cells-in-homeostasis-regeneration-and-immune-defence-mechanisms
#20
REVIEW
R Ariel Gomez, Maria Luisa S Sequeira-Lopez
An accumulating body of evidence suggests that renin-expressing cells have developed throughout evolution as a mechanism to preserve blood pressure and fluid volume homeostasis as well as to counteract a number of homeostatic and immunological threats. In the developing embryo, renin precursor cells emerge in multiple tissues, where they differentiate into a variety of cell types. The function of those precursors and their progeny is beginning to be unravelled. In the developing kidney, renin-expressing cells control the morphogenesis and branching of the renal arterial tree...
April 2018: Nature Reviews. Nephrology
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