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https://www.readbyqxmd.com/read/29330408/collagen-type-1-accelerates-healing-of-ruptured-fetal-membranes
#1
Haruta Mogami, Annavarapu Hari Kishore, R Ann Word
Preterm premature rupture of membranes (pPROM) is a major cause of preterm birth. Recently, extracellular matrix-directed treatment is applied for wound healing. Here, we used a pregnant mouse model to test the efficacy of collagen type 1 gel for healing of the prematurely ruptured fetal membranes. Although injection of PBS into the ruptured fetal membranes resulted in 40% closure, injection of collagen type 1 improved closure rates to 90% within 72 h. Macrophages of the M2 wound healing phenotype were entrapped in the collagen layer...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29328490/galectin-1-expression-in-activated-pancreatic-satellite-cells-promotes-fibrosis-in-chronic-pancreatitis-pancreatic-cancer-via-the-tgf-%C3%AE-1-smad-pathway
#2
Dong Tang, Qi Wu, Jingqiu Zhang, Hongpeng Zhang, Zhongxu Yuan, Jiaming Xu, Yang Chong, Yuqin Huang, Qingquan Xiong, Sen Wang, Ying Tian, Yongdie Lu, Xiao Ge, Wenjing Shen, Daorong Wang
Chronic pancreatitis/pancreatic cancer (CP/PC) is characterized by fibrous connective tissue proliferation induced by activated pancreatic stellate cells (PSCs). Galectin-1 is upregulated in activated PSCs and is important for the continuing activation of PSCs. The aim of this study was to evaluate the effect of galectin-1 derived from activated PSCs on the progression of fibrosis in CP/PC. To this end, the expression of desmin, α-SMA, galectin-1, fibronectin and collagen type I in normal pancreatic, CP and PC tissues, as well as quiescent/activated PSCs, was investigated...
January 9, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29326316/fibronectin-containing-extra-domain-a-induces-plaque-destabilization-in-the-innominate-artery-of-aged-apolipoprotein-e-deficient-mice
#3
Prakash Doddapattar, Manish Jain, Nirav Dhanesha, Steven R Lentz, Anil K Chauhan
OBJECTIVE: Fibronectin containing extra domain A (Fn-EDA) is an endogenous ligand of TLR4 (toll-like receptor 4) and is abundant in the extracellular matrix of advanced atherosclerotic lesions in human and mice. Irrespective of sex, deletion of Fn-EDA reduces early atherosclerosis in apolipoprotein E-deficient (Apoe-/-) mice. However, the contribution of Fn-EDA in advanced atherosclerosis remains poorly characterized. We determined the contribution of Fn-EDA in advanced atherosclerotic lesions of aged (1-year-old) Apoe-/- mice...
January 11, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29326134/evaluation-of-estrogenic-potential-by-herbal-formula-hpc-03-for-in-vitro-and-in-vivo
#4
Bo Yoon Chang, Dae Sung Kim, Hye Soo Kim, Sung Yeon Kim
HPC 03 is herbal formula that consists of extracts from Angelica gigas, Cnidium officinale Makino and Cinnamomum cassia Presl. The present study evaluated the estrogenic potential of HPC 03 by using in vitro and in vivo models. The regulatory mechanisms of HPC 03 in estrogen-dependent MCF-7 cells were assessed. HPC 03 induced the proliferation of estrogen receptor-positive MCF-7 cells, and the proliferation was blocked by the addition of the estrogen antagonist tamoxifen. The estrogen receptorα/β luciferase activities were significantly increased by HPC 03 treatment, which also increased the mRNA expression of the estrogen-responsive genes Psen2, Pgr and Ctsd Also, we evaluated the ameliorative effects of HPC 03 on menopausal symptoms in ovariectomized rats...
February 2018: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/29325930/integrated-study-on-comparative-transcriptome-and-skeletal-muscle-function-in-aged-rats
#5
Jing Zhou, Zhiyin Liao, Jinliang Chen, Kexiang Zhao, Qian Xiao
The present study aimed to reveal aging-related changes in the skeletal muscle of SD rats by comparing transcriptome analysis, integrated with muscle physiological parameters. Ten rats aged 25 months were set as the old group (OG) and ten rats aged 6 months were set as the young group (YG). After 6 weeks of feeding, the body mass, grip strength, and gastrocnemius muscle mass were determined, and the differentially expressed genes were analyzed by transcriptome sequencing, followed by GO enrichment analysis and KEGG analysis...
January 8, 2018: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/29325278/-effect-of-cannabinoid-receptor-2-agonist-am1241-on-platelet-derived-growth-factor-expression-in-the-liver-tissue-of-mice-with-hepatic-fibrosis
#6
P He, Y F Wu, H Y Yang, M L Cheng, Y D Liang, Y P Wang
Objective: To investigate the effect of cannabinoid receptor-2 (CB2) agonist AM1241 on the mRNA and protein expression of platelet-derived growth factor (PDGF) and collagen-III (Col-III) in the liver tissue of mice with experimental liver fibrosis induced by carbon tetrachloride (CCl(4)). Methods: Totally 38 8-week-old male C57BL/6J mice were randomly divided into control group, model group, 3 mg/kg CB2 receptor agonist (AM1241) group, and 9 mg/kg AM1241 group. All mice, except for the control group, were treated with 30% CCl(4) (three times a week, 5 ml/kg body weight, 16 weeks) to establish a liver fibrosis model...
November 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/29323256/splicing-of-platelet-resident-pre-mrnas-upon-activation-by-physiological-stimuli-results-in-functionally-relevant-proteome-modifications
#7
Giovanni Nassa, Giorgio Giurato, Giovanni Cimmino, Francesca Rizzo, Maria Ravo, Annamaria Salvati, Tuula A Nyman, Yafeng Zhu, Mattias Vesterlund, Janne Lehtiö, Paolo Golino, Alessandro Weisz, Roberta Tarallo
Platelet activation triggers thrombus formation in physiological and pathological conditions, such as acute coronary syndromes. Current therapies still fail to prevent thrombotic events in numerous patients, indicating that the mechanisms modulating platelet response during activation need to be clarified. The evidence that platelets are capable of de novo protein synthesis in response to stimuli raised the issue of how megakaryocyte-derived mRNAs are regulated in these anucleate cell fragments. Proteogenomics was applied here to investigate this phenomeon in platelets activated in vitro with Collagen or Thrombin Receptor Activating Peptide...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29323029/environmental-cues-determine-the-fate-of-astrocytes-after-spinal-cord-injury
#8
REVIEW
Fatima M Nathan, Shuxin Li
Reactive astrogliosis occurs after central nervous system (CNS) injuries whereby resident astrocytes form rapid responses along a graded continuum. Following CNS lesions, naïve astrocytes are converted into reactive astrocytes and eventually into scar-forming astrocytes that block axon regeneration and neural repair. It has been known for decades that scarring development and its related extracellular matrix molecules interfere with regeneration of injured axons after CNS injury, but the cellular and molecular mechanisms for controlling astrocytic scar formation and maintenance are not well known...
December 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29322373/epac-is-required-for-exogenous-and-endogenous-stimulation-of-adenosine-a2b-receptor-for-inhibition-of-angiotensin-ii-induced-collagen-synthesis-and-myofibroblast-differentiation
#9
Sarawuth Phosri, Kwanchai Bunrukchai, Warisara Parichatikanond, Vilasinee H Sato, Supachoke Mangmool
Angiotensin II (Ang II) plays an important role on the pathogenesis of cardiac fibrosis. Prolong and overstimulation of angiotensin II type 1 receptor with Ang II-induced collagen synthesis and myofibroblast differentiation in cardiac fibroblasts, leading to cardiac fibrosis. Although adenosine and its analogues are known to have cardioprotective effects, the mechanistic by which adenosine A2 receptors (A2Rs) inhibit Ang II-induced cardiac fibrosis is not clearly understood. In the present study, we examined the effects of exogenous adenosine and endogenous adenosine on Ang II-induced collagen and myofibroblast differentiation determined by α-smooth muscle action (α-SMA) overexpression and their underlying signal transduction...
January 10, 2018: Purinergic Signalling
https://www.readbyqxmd.com/read/29318649/treatment-related-changes-in-bone-turnover-and-fracture-risk-reduction-in-clinical-trials-of-anti-resorptive-drugs-a-meta-regression
#10
Douglas C Bauer, Dennis M Black, Mary L Bouxsein, Li-Yung Lui, Jane A Cauley, Anne E de Papp, Andreas Grauer, Sundeep Khosla, Charles E McCulloch, Richard Eastell
Few pooled analyses of antiresorptive (AR) treatment trials relate short-term changes in bone turnover markers (BTMs) to subsequent fracture reduction. Such information would be useful to assess new ARs or novel dosing regimens. In the Foundation for the National Institutes of Health (FNIH) Bone Quality project, we analyzed individual-level data from 28,000 participants enrolled in 11 bisphosphonate (BP) and three selective estrogen receptor modulator (SERM) placebo-controlled fracture endpoint trials. Using BTM results for two bone formation markers (bone-specific alkaline phosphatase [bone ALP] and pro-collagen I N-propeptide [PINP]) and two bone resorption markers (N-terminal and C-terminal telopeptide of type I collagen) and incident fracture outcome data, we performed a meta-regression relating the mean net effect of treatment on change in bone turnover (active minus placebo % difference after 3 to 12 months) to the log of study-wide fracture risk reduction, and used linear regression to plot the best fitting line...
January 10, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29314863/bacterial-derived-neutrophilic-inflammation-drives-lung-remodeling-in-a-mouse-model-of-copd
#11
Bradley W Richmond, Rui-Hong Du, Wei Han, John T Benjamin, Riet van der Meer, Linda Gleaves, Marshall Guo, Austin McKissack, Yongqin Zhang, Dong-Sheng Cheng, Vasiliy V Polosukhin, Timothy S Blackwell
Loss of secretory immunoglobulin A (SIgA) is common in the small airways of patients with chronic obstructive pulmonary disease (COPD) and may contribute to disease pathogenesis. Using mice that lack SIgA in the airways due to genetic deficiency of polymeric immunoglobulin receptor (pIgR-/- mice), we investigated the role of neutrophils in driving the fibrotic small airway wall remodeling and emphysema that develops spontaneously in these mice. By flow cytometry, we found an increase in the percentage of neutrophils among CD45+ cells in the lungs, as well as an increase in total neutrophils, in pIgR-/- mice compared to wild-type (WT) controls...
January 9, 2018: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29313404/vitamin-d-diminishes-the-high-platelet-aggregation-of-type-2-diabetes-mellitus-patients
#12
Maya Sultan, Orit Twito, Tali Tohami, Erez Ramati, Eran Neumark, Gloria Rashid
Platelet activation is found in inflammatory conditions and implicated in the pathogenesis of chronic medical conditions, such as atherosclerosis, coronary vascular disease, cerebrovascular disease, and diabetes mellitus (DM). HbA1c is inversely related to vitamin D25 levels in individuals with and without DM. This study aimed to determine the relation between platelet aggregation, vitamin D and HbA1c among healthy individuals and those with Type 2 DM (T2DM). The direct effect of vitamin D1, 25 (calcitriol) on platelet aggregation was also investigated...
January 9, 2018: Platelets
https://www.readbyqxmd.com/read/29313089/first-delivery-and-ovariectomy-affect-biomechanical-and-structural-properties-of-the-vagina-in-the-ovine-model
#13
Iva Urbankova, Geertje Callewaert, Silvia Blacher, Dries Deprest, Lucie Hympanova, Andrew Feola, Laurent De Landsheere, Jan Deprest
INTRODUCTION AND HYPOTHESIS: Animal models are useful for investigating the genesis of pelvic floor dysfunction and for developing novel therapies for its treatment. There is a need for an alternative large-animal model to the nonhuman primate. Therefore we studied the effects of the first vaginal delivery, ovariectomy and systemic hormonal replacement therapy (HRT) on the biomechanical and structural properties of the ovine vagina. METHODS: We examined the gross anatomical properties of nulliparous, primiparous, ovariectomized multiparous, and ovariectomized hormone-replaced multiparous sheep (six animals per group)...
January 8, 2018: International Urogynecology Journal
https://www.readbyqxmd.com/read/29312540/cyslt1-receptor-antagonist-alleviates-pathogenesis-of-collagen-induced-arthritis-mouse-model
#14
Minwen Xu, Ruiyun Hong, Xiaoli Zhang, Hailin Zou, Yi Zhang, Zhiping Hou, Liefeng Wang
Cysteinyl leukotrienes (CysLTs) play a key role in inflammatory diseases such as asthma and their receptors' antagonists are currently used as anti-asthmatic drugs. CysLTs have also been found to participate in other inflammatory reactions. Here, we reported that in rheumatoid arthritis (RA) animals model, collagen-induced arthritis, (CIA), CysLT1, a receptor for CysLTs, was up-regulated in hind paw and lymph node, while CysLTs levels in the blood were also higher than normal mice. Montelukast, a drug targeting CysLT1, has been shown to effectively reduce the CIA incidence, peak severity, and cumulative disease scores...
December 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29310777/basement-membrane-collagen-iv-isolation-of-functional-domains
#15
Sergei P Boudko, Neonila Danylevych, Billy G Hudson, Vadim K Pedchenko
Collagen IV is a major constituent of basement membranes, specialized form of extracellular matrix that provides a mechanical support for tissues, serves as a polyvalent ligand for cell adhesion receptors and as a scaffold for other proteins, and plays a key role in tissue genesis, differentiation, homeostasis, and remodeling. Collagen IV underlies the pathogenesis of several human disorders including Goodpasture's disease, Alport's syndrome, diabetic nephropathy, angiopathy, and porencephaly. While the isolation of the collagen IV molecules from tissues is an ultimate prerequisite for structural and functional studies, it has been always hampered by the protein insolubility due to extensive intermolecular crosslinking and noncovalent associations with other components of basement membranes...
2018: Methods in Cell Biology
https://www.readbyqxmd.com/read/29305330/role-of-a-macrophage-receptor-with-collagenous-structure-marco-in-regulating-monocyte-macrophage-functions-in-ayu-plecoglossus-altivelis
#16
Le Zhang, Li Nie, Shi-Yu Cai, Jie Chen, Jiong Chen
Macrophage receptor with collagenous structure (MARCO) plays essential roles in phagocytic cell-mediated innate immune responses. However, studies regarding MARCO, especially its functions, are limited in teleost species. In this study, we identified a MARCO molecule (PaMARCO) from ayu (Plecoglossus altivelis). PaMARCO shared conserved functional domains with its mammalian counterparts. Sequence analysis showed that PaMARCO was most closely related to its rainbow trout (Oncorhynchus mykiss) counterpart. PaMARCO expression was upregulated in all tested immune tissues and monocytes/macrophages (MO/MΦ) upon Vibrio anguillarum infection, and blocking its function significantly decreased the immune responses of MO/MΦ during infection...
January 2, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29304116/the-sorafenib-anti-relapse-effect-after-allohsct-is-associated-with-heightened-alloreactivity-and-accumulation-of-cd8-pd-1-cd279-lymphocytes-in-marrow
#17
Andrzej Lange, Emilia Jaskula, Janusz Lange, Grzegorz Dworacki, Dorota Nowak, Aleksandra Simiczyjew, Monika Mordak-Domagala, Mariola Sedzimirska
We studied three FLT3 ITD acute myeloid leukemia (AML) patients who relapsed after allogeneic haematopoietic stem cell transplantation (alloHSCT) and received multikinase inhibitor (MKI) sorafenib as part of salvage therapy. MKI was given to block the effect of FLT3 ITD mutation which powers proliferation of blast cells. However, the known facts that sorafenib is more effective in patents post alloHSCT suggested that this MKI can augment the immune system surveillance on leukaemia. In the present study, we investigated in depth the effect of sorafenib on the alloreactivity seen post-transplant including that on leukaemia...
2018: PloS One
https://www.readbyqxmd.com/read/29301869/astragaloside-iv-inhibits-ventricular-remodeling-and-improves-fatty-acid-utilization-in-rats-with-chronic-heart-failure
#18
Bin Tang, Jin-Guo Zhang, Hong-Yong Tan, Xi-Qing Wei
Chronic heart failure (CHF) is the end-stage of many cardiovascular diseases and severely affects the patients' lifespan. Inhibiting ventricular remodeling is thus a primary treatment target for CHF patients. Astragaloside IV (AS-IV) can improve cardiac function and protect myocardial cells. The study aims to investigate the effects of AS-IV on ventricular remodeling and explore its role in regulating energy metabolism using a rat CHF model. Sprague Dawley rats were divided into 5 groups (N=20 per group):  CHF + benazepril hydrochloride, CHF + low-dose (30 mg...
January 4, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29298894/tumor-extrinsic-discoidin-domain-receptor-1-promotes-mammary-tumor-growth-by-regulatingadipose-stromal-interleukin-6-production-in-mice
#19
Xiujie Sun, Kshama Gupta, Bogang Wu, Deyi Zhang, Bin Yuan, Xiaowen Zhang, Huai-Chin Chiang, Chi Zhang, Tyler J Curiel, Michelle P Bendeck, Stephen Hursting, Yanfen Hu, Rong Li
Discoidin domain receptor 1 (DDR1) is a collagen receptor that mediates cell communications with the extracellular matrix (ECM). Aberrant expression and activity of DDR1 in tumor cells are known to promote tumor growth. Although elevated DDR1 levels in stroma of breast tumors are associated with poor patient outcome, a causal role for tumor-extrinsic DDR1 in cancer promotion remains unclear, however. Here, we report that murine mammary tumor cells transplanted to syngeneic recipient mice in which Ddr1 has been knocked out (KO) grow less robustly than in WT mice...
January 3, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29296974/urokinase-plasminogen-activator-and-receptor-promote-collagen-induced-arthritis-through-expression-in-hematopoietic-cells
#20
Sherry Thornton, Harini Raghu, Carolina Cruz, Malinda D Frederick, Joseph S Palumbo, Eric S Mullins, Kasper Almholt, Pernille A Usher, Matthew J Flick
The plasminogen activation (PA) system has been implicated in driving inflammatory arthritis, but the precise contribution of PA system components to arthritis pathogenesis remains poorly defined. Here, the role of urokinase plasminogen activator (uPA) and its cognate receptor (uPAR) in the development and severity of inflammatory joint disease was determined using uPA- and uPAR-deficient mice inbred to the strain DBA/1J, a genetic background highly susceptible to collagen-induced arthritis (CIA). Mice deficient in uPA displayed a near-complete amelioration of macroscopic and histological inflammatory joint disease following CIA challenge...
March 28, 2017: Blood Advances
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