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https://www.readbyqxmd.com/read/29775892/microrna-135a-inhibits-cardiac-fibrosis-induced-by-isoproterenol-via-trpm7-channel
#1
Yan Wu, Yonghui Liu, Yitong Pan, Chunxiao Lu, Haonan Xu, Xiaozhi Wang, Tingting Liu, Kai Feng, Yiqun Tang
BACKGROUND: Cardiac fibrosis is a crucial factor of heart failure. It has been reported that several microRNAs (miRNAs, miRs) were involved in cardiac fibrosis, however, the role and possible regulatory mechanism of microRNA-135a (miR-135a) in cardiac fibrosis have not been investigated. Here, we explored the regulation mechanism of miR-135a on cardiac fibrosis. METHODS AND RESULTS: In vitro, cardiac fibroblasts (CFs) from neonatal rats were treated by isoproterenol (ISO) at the final concentration of 10 μM for 24 h and miR-135a expression was decreased obviously...
May 15, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29775649/expression-and-function-of-tlr4-induced-b1r-bradykinin-receptor-on-cardiac-fibroblasts
#2
Claudia Muñoz-Rodríguez, Samuel Fernández, José Miguel Osorio, Francisco Olivares, Renatto Anfossi, Samir Bolivar, Claudio Humeres, Pía Boza, Raúl Vivar, Viviana Pardo-Jimenez, Karen E Hemmings, Neil A Turner, Guillermo Díaz-Araya
Cardiac fibroblasts (CF) are key cells for maintaining extracellular matrix (ECM) protein homeostasis in the heart, and for cardiac repair through CF-to-cardiac myofibroblast (CMF) differentiation. Additionally, CF play an important role in the inflammatory process after cardiac injury, and they express Toll like receptor 4 (TLR4), B1 and B2 bradykinin receptors (B1R and B2R) which are important in the inflammatory response. B1R and B2R are induced by proinflammatory cytokines and their activation by bradykinin (BK: B2R agonist) or des-arg-kallidin (DAKD: B1R agonist), induces NO and PGI2 production which is key for reducing collagen I levels...
May 15, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29774633/a-simple-and-cost-efficient-adherent-culture-platform-for-human-gastric-primary-cells-as-an-in-vitro-model-for-helicobacter-pylori-infection
#3
Samaneh Saberi, Behshad Pournasr, Zahra Farzaneh, Maryam Esmaeili, Mahmoud Eshagh Hosseini, Hossein Baharvand, Marjan Mohammadi
BACKGROUND: Most two- dimensional in vitro models for studying host- H. pylori interactions rely on tumor-derived cell lines, which harbor malignant alterations. The recent development of human gastric organoids has overcome this limitation and provides a highly sophisticated, yet costly, short-term model for H. pylori infection, with restricted use in low-budget centers. METHOD: Tissue specimens from upper, middle, and lower stomachs of H. pylori-negative volunteers were collectively dispersed and cultured on mouse embryonic fibroblast (MEF) or collagen-coated plates...
May 17, 2018: Helicobacter
https://www.readbyqxmd.com/read/29774570/high-mobility-group-box-1-drives-fibrosis-progression-signaling-via-the-receptor-for-advanced-glycation-end-products-in-mice
#4
Xiaodong Ge, Elena Arriazu, Fernando Magdaleno, Daniel J Antoine, Rouchelle Dela Cruz, Neil Theise, Natalia Nieto
BACKGROUND & RATIONALE: High-mobility group box-1 (HMGB1) is a damage-associated molecular pattern (DAMP) increased in response to liver injury. Since HMGB1 is a ligand for the receptor for advanced glycation end-products (RAGE), we hypothesized that induction of HMGB1 could participate in the pathogenesis of liver fibrosis via RAGE cell-specific signaling mechanisms. RESULTS: liver HMGB1 protein expression correlated with fibrosis stage in patients with chronic Hepatitis C virus (HCV) infection, primary biliary cirrhosis (PBC) and alcoholic steatohepatitis (ASH)...
May 18, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29771006/the-anti-fibrotic-effect-of-adenosine-a2b-receptor-antagonism-in-a-mouse-model-of-dermal-fibrosis
#5
Harry Karmouty-Quintana, Jose G Molina, Kemly Philip, Chiara Bellocchi, Brent Gudenkauf, Minghua Wu, Ning-Yuan Chen, Scott D Collum, Junsuk Ko, Sandeep K Agarwal, Shervin Assassi, Hongyan Zhong, Michael R Blackburn, Tingting Weng
OBJECTIVE: Systemic sclerosis (SSc - scleroderma) is a chronic disease that affects the skin and various internal organs. Dermal fibrosis is a major component of this disease. The mechanisms that promote dermal fibrosis remain elusive. Elevations in tissue adenosine levels and the subsequent engagement of the pro-fibrotic A2B adenosine receptor (ADORA2B) have been shown to regulate fibrosis in multiple organs including the lung, kidney and penis; however, the role of the ADORA2B in dermal fibrosis has not been investigated...
May 17, 2018: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29769618/inhibitor-of-apoptosis-proteins-iaps-mediate-collagen-type-xi-alpha-1-driven-cisplatin-resistance-in-ovarian-cancer
#6
Miran Rada, Sameera Nallanthighal, Jennifer Cha, Kerry Ryan, Jessica Sage, Catherine Eldred, Maria Ullo, Sandra Orsulic, Dong-Joo Cheon
Although, cisplatin resistance is a major challenge in the treatment of ovarian cancer, the precise mechanisms underlying cisplatin resistance are not fully understood. Collagen type XI alpha 1 (COL11A1), a gene encoding a minor fibrillar collagen of the extracellular matrix, is identified as one of the most upregulated genes in cisplatin-resistant ovarian cancer and recurrent ovarian cancer. However, the exact functions of COL11A1 in cisplatin resistance are unknown. Here we demonstrate that COL11A1 binds to integrin α1β1 and discoidin domain receptor 2 (DDR2) and activates downstream signaling pathways to inhibit cisplatin-induced apoptosis in ovarian cancer cells...
May 17, 2018: Oncogene
https://www.readbyqxmd.com/read/29769337/entry-of-herpes-simplex-virus-1-into-epidermis-and-dermal-fibroblasts-is-independent-of-the-scavenger-receptor-marco
#7
Katharina Thier, Maureen Möckel, Katja Palitzsch, Katinka Döhner, Beate Sodeik, Dagmar Knebel-Mörsdorf
To enter host cells, herpes simplex virus 1 (HSV-1) initially attaches to cell surface glycosaminoglycans followed by requisite binding to one of several cellular receptors leading to viral internalization. Although virus-receptor interactions have been studied in various cell lines, the contributions of individual receptors to uptake into target tissues such as mucosa, skin or cornea are not well understood. We demonstrated that nectin-1 acts as major receptor for HSV-1 entry into murine epidermis, while HVEM can serve as alternative receptor...
May 16, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29769195/osteocyte-driven-downregulation-of-snail-restrains-effects-of-drd2-inhibitors-on-mammary-tumor-cells
#8
Shengzhi Liu, Yao Fan, Andy Chen, Aydin Jalali, Kazumasa Minami, Kazuhiko Ogawa, Harikrishna Nakshatri, Bai-Yan Li, Hiroki Yokota
While bone is a frequent target of breast cancer-associated metastasis, little is known about the effects of tumor-bone interactions on the efficacy of tumor-suppressing agents. Here we examined the effect of two FDA-approved dopamine modulators, Fluphenazine (FP) and Trifluoperazine (TFP), on mammary tumor cells, osteoclasts, osteoblasts, and osteocytes. These agents suppressed proliferation and migration of mammary tumor cells chiefly by antagonizing dopamine receptor D2 and reduced bone resorption by downregulating nuclear factor of activated T-cells, cytoplasmic 1 (Nfatc1)...
May 16, 2018: Cancer Research
https://www.readbyqxmd.com/read/29765214/tiotropium-inhibits-methacholine-induced-extracellular-matrix-production-via-%C3%AE-catenin-signaling-in-human-airway-smooth-muscle-cells
#9
Yating Huo, Lili Guan, Jiawen Xu, Luqian Zhou, Rongchang Chen
Background: Airway remodeling is an important feature of chronic obstructive pulmonary disease (COPD) that is associated with disease severity and irreversible airflow limitation. An extensive alteration of the extracellular matrix (ECM) surrounding the airway smooth muscle (ASM) bundle is one of the pathological manifestations of airway remodeling, which contributes to the decline in lung function. Tiotropium, a long-acting inhaled muscarinic receptor antagonist, has been confirmed to play a role in preventing airway remodeling including ECM deposition beyond bronchodilation in vivo, but the relationship between ASM cell (ASMC) relaxation and ECM production remains unclear...
2018: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29764467/association-of-il17rc-and-col6a1-genetic-polymorphisms-with-susceptibility-to-ossification-of-the-thoracic-posterior-longitudinal-ligament-in-chinese-patients
#10
Peng Wang, Xiao Liu, Bin Zhu, Yunlong Ma, Lei Yong, Ze Teng, Chen Liang, Guanping He, Xiaoguang Liu
BACKGROUND: In our previous whole-genome sequencing study of 30 unrelated northern Chinese Han patients, we identified six single nucleotide polymorphisms (SNPs) in the interleukin 17 receptor C (IL17RC) and collagen type VI α1 chain (COL6A1) genes that were potentially associated with thoracic ossification of the posterior longitudinal ligament (T-OPLL). To determine whether these six SNPs are associated with susceptibility to T-OPLL in the northern Chinese Han population, we performed a case-control association study to confirm specific susceptible loci in the expanded samples...
May 15, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29763968/binding-to-type-i-collagen-is-essential-for-the-infectivity-of-vibrio-parahaemolyticus-to-host-cells
#11
Ming Liu, Shanshan Yang, Chengkun Zheng, Xuesong Luo, Weicheng Bei, Peng Cai
Vibrio parahaemolyticus is a globally present marine bacterium that often leads to acute gastroenteritis. Two type III secretion systems (T3SSs), T3SS1 and T3SS2, are important for host infection. Type I collagen is a component of the extracellular matrix and is abundant in the small intestine. However, whether type I collagen serves as the cellular receptor for V. parahaemolyticus infection of host cells remains enigmatic. In this study, we discovered that type I collagen is not only important for the attachment of V...
May 15, 2018: Cellular Microbiology
https://www.readbyqxmd.com/read/29760696/podosomes-but-not-the-maturation-status-determine-the-protease-dependent-3d-migration-in-human-dendritic-cells
#12
Céline Cougoule, Claire Lastrucci, Romain Guiet, Rémi Mascarau, Etienne Meunier, Geanncarlo Lugo-Villarino, Olivier Neyrolles, Renaud Poincloux, Isabelle Maridonneau-Parini
Dendritic cells (DC) are professional Antigen-Presenting Cells scattered throughout antigen-exposed tissues and draining lymph nodes, and survey the body for pathogens. Their ability to migrate through tissues, a 3D environment, is essential for an effective immune response. Upon infection, recognition of Pathogen-Associated Molecular Patterns (PAMP) by Toll-like receptors (TLR) triggers DC maturation. Mature DC (mDC) essentially use the protease-independent, ROCK-dependent amoeboid mode in vivo , or in collagen matrices in vitro ...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29758174/g-protein-coupled-estrogen-receptor-gper-deficiency-induces-cardiac-remodeling-through-oxidative-stress
#13
Hao Wang, Xuming Sun, Marina S Lin, Carlos M Ferrario, Holly Van Remmen, Leanne Groban
Oxidative stress has been implicated in the unfavorable changes in cardiac function and remodeling that occur after ovarian estrogen loss. Using ovariectomized rat models, we previously reported that the cardioprotective actions of estrogen are mediated by the G protein-coupled estrogen receptor (GPER). Here, in 9-month-old, female cardiomyocyte-specific GPER knockout (KO) mice vs sex- and age-matched wild-type (WT) mice, we found increased cardiac oxidative stress and oxidant damage, measured as a decreased ratio of reduced glutathione to oxidized glutathione, increased 4-hydroxynonenal and 8-hydroxy-2'-deoxyguanosine (8-oxo-DG) staining, and increased expression of oxidative stress-related genes...
April 25, 2018: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29755657/regulatory-effect-of-anti-gp130-functional-mab-on-il-6-mediated-rankl-and-wnt5a-expression-through-jak-stat3-signaling-pathway-in-fls
#14
Ping Miao, Xiao Wei Zhou, Ping Wang, Rong Zhao, Ninan Chen, Chao Ying Hu, Xue Hua Chen, Liu Qian, Qi Wen Yu, Ji Ying Zhang, Rong Xu, Dong Yi He, Lian Bo Xiao, Pu Li, Mason Lu, Dong Qing Zhang
We investigated the effect on rheumatoid arthritis (RA) of an anti-gp130 monoclonal antibody (mAb) and its mechanism using RA fibroblast-like synoviocytes (FLS) and a collagen antibody-induced arthritis (CAIA) mouse model. We determined the interleukin 6 (IL-6), IL-6 receptor α (IL-6Rα), gp130, receptor activator of nuclear factor κB ligand (RANKL), matrix metalloproteinase 3 (MMP3), TIMP metallopeptidase inhibitor 1 (TIMP1), and Bcl-2 levels in RA and osteoarthritis (OA) serum and synovial fluid. RA FLS were cultured with or without IL-6/IL-6Rα; WNT5A and RANKL levels were detected...
April 17, 2018: Oncotarget
https://www.readbyqxmd.com/read/29752552/collagen-vi-is-required-for-the-structural-and-functional-integrity-of-the-neuromuscular-junction
#15
Matilde Cescon, Ilaria Gregorio, Nane Eiber, Doriana Borgia, Aurora Fusto, Patrizia Sabatelli, Michele Scorzeto, Aram Megighian, Elena Pegoraro, Said Hashemolhosseini, Paolo Bonaldo
The synaptic cleft of the neuromuscular junction (NMJ) consists of a highly specialized extracellular matrix (ECM) involved in synapse maturation, in the juxtaposition of pre- to post-synaptic areas, and in ensuring proper synaptic transmission. Key components of synaptic ECM, such as collagen IV, perlecan and biglycan, are binding partners of one of the most abundant ECM protein of skeletal muscle, collagen VI (ColVI), previously never linked to NMJ. Here, we demonstrate that ColVI is itself a component of this specialized ECM and that it is required for the structural and functional integrity of NMJs...
May 11, 2018: Acta Neuropathologica
https://www.readbyqxmd.com/read/29752407/integrin-%C3%AE-v%C3%AE-3-associated-daam1-is-essential-for-collagen-induced-invadopodia-extension-and-cell-haptotaxis-in-breast-cancer-cells
#16
Ting Yan, Ailiang Zhang, Fangfang Shi, Fei Chang, Jie Mei, Yongjian Liu, Yichao Zhu
The formin protein dishevelled-associated activator of morphogenesis 1 (DAAM1) polymerizes straight actin filaments and mediates migration of cancer cells. However, how DAAM1 governs cell haptotaxis in response to collagen remains unexplored in breast cancer cells. We hypothesized that DAAM1 mediates invadopodia extension and cell haptotaxis in response to type IV collagen in association with integrin receptors. Using Boyden chamber membranes coated with type IV collagen, we show here that type IV collagen activates both DAAM1 and  Ras homolog family member A (RHOA)  and promotes haptotaxis of MDA-MB-231 and MDA-MB-453 breast cancer cells, a process abolished by treatment with the integrin αvβ3 inhibitor cyclo(-RGDfK)...
May 11, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29752040/mesenchymal-stem-cell-derived-microvesicles-alleviate-pulmonary-arterial-hypertension-by-regulating-renin-angiotensin-system
#17
Zhenjun Liu, Jinghu Liu, Mengyuan Xiao, Junxian Wang, Feng Yao, Weikai Zeng, Liqin Yu, Yuejie Guan, Wenyan Wei, Zijian Peng, Kunpeng Zhu, Jin Wang, Zhongyuan Yang, Jixin Zhong, Jianying Chen
In recent years, microvesicles (MVs) derived from mesenchymal stem cells (MSCs) have been proved to be able to improve the outcome of pulmonary arterial hypertension (PAH) in many respects, but the underlying mechanisms of it still remain unclear. Because the renin-angiotensin system (RAS) has been found to be closely related to PAH, the present study was designed to investigate whether the effect of MSC-derived MVs on PAH was correlated with RAS. MVs were isolated and purified from bone marrow MSCs. PAH rat models were established by a single intraperitoneal injection of 1% monocrotaline (MCT, 50 mg/Kg)...
March 15, 2018: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/29750298/role-of-smad3-signaling-in-the-epithelial%C3%A2-mesenchymal-transition-of-the-lens-epithelium-following-injury
#18
Fanlan Meng, Jun Li, Xiao Yang, Xiaoyong Yuan, Xin Tang
Transforming growth factor‑β (TGF‑β) is important in the development of posterior capsule opacification (PCO), and inhibition of the TGF‑β pathway may represent a novel method of treating PCO. Drosophila protein, mothers against decapentaplegic homolog 3 (Smad3) is a phosphorylated receptor‑activated Smad required for the transmission of TGF‑β signals. Smad3 knockout (KO) disturbs the activation of TGF‑β signaling, thus inhibiting the onset of PCO. In the present study, lens epithelial cell (LEC) damage induced by extracapsular cataract extraction was simulated by puncture of the anterior capsule using a 26‑gauge hypodermic needle...
May 9, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29749998/morphological-and-immunohistochemical-diversity-of-endometrial-stromal-sarcoma-in-rats
#19
Shino Kumabe, Junko Sato, Yuki Tomonari, Miwa Takahashi, Kaoru Inoue, Midori Yoshida, Takuya Doi, Yumi Wako, Minoru Tsuchitani
To clarify the histopathological characteristics of rat endometrial stromal sarcoma (ESS), we morphologically reviewed 12 malignant uterine tumors protruding into the lumen in previous rat carcinogenicity studies. The 12 cases were classified into the following 6 types based on their morphological features: spindle cell and collagen rich type, pleomorphic/spindle cell and compact type, decidual alteration type, histiocytic and multinucleated giant cell mixture type, Antoni A-type schwannoma type, and Antoni B-type schwannoma type...
April 2018: Journal of Toxicologic Pathology
https://www.readbyqxmd.com/read/29749990/optimization-of-the-static-human-osteoblast-osteoclast-co-culture-system
#20
James Jam Jolly, Kok-Yong Chin, Mohd Fozi Nur Farhana, Ekram Alias, Kien Hui Chua, Wan Nuraini Wan Hasan, Soelaiman Ima-Nirwana
Osteoblasts (OBs) and osteoclasts (OCs) are 2 major groups of bone cells. Their cell-to-cell interactions are important to ensure the continuity of the bone-remodeling process. Therefore, the present study was carried out to optimize an OB/OC co-culture system utilizing the human OB cell line hFOB 1.19 and OCs extracted from peripheral blood mononuclear cells (PBMNCs). It was a 2-step procedure, involving the optimization of the OB culture and the co-culture of the OBs with PBMNCs at an optimum ratio. Firstly, pre-OBs were cultured to 90% confluency and the time required for differentiation was determined...
March 2018: Iranian Journal of Medical Sciences
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