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https://www.readbyqxmd.com/read/29352392/impact-of-dexamethasone-concentration-on-cartilage-tissue-formation-from-human-synovial-derived-stem-cells-in-vitro
#1
Ryota Chijimatsu, Masato Kobayashi, Kosuke Ebina, Toru Iwahashi, Yosuke Okuno, Makoto Hirao, Atsunori Fukuhara, Norimasa Nakamura, Hideki Yoshikawa
Human synovial mesenchymal stem cells (hSMSCs) are a promising cell source for cartilage regeneration because of their superior chondrogenic potential in vitro. This study aimed to further optimize the conditions for inducing chondrogenesis of hSMSCs, focusing on the dose of dexamethasone in combination with transforming growth factor-β3 (TGFβ3) and/or bone morphogenetic protein-2 (BMP2). When hSMSCs-derived aggregates were cultured with TGFβ3, dexamethasone up to 10 nM promoted chondrogenesis, but attenuated it with heterogeneous tissue formation when used at concentrations over than 100 nM...
January 19, 2018: Cytotechnology
https://www.readbyqxmd.com/read/29349780/protective-effect-of-bled-exposed-conditioned-media-on-cell-injury
#2
Phil-Sun Oh, Eun-Mi Kim, Minjoo Kim, In Sun Kim, Yeon-Hee Han, SeokTae Lim, Myung-Hee Sohn, Myoung-Hwan Ko, Hwan-Jeong Jeong
Previous studies have reported that 450 nm blue light emitting diode (BLED) induces apoptosis through a mitochondria-mediated pathway in cancer cells and reduces the early stage tumor growth. The present study was performed to determine the effects of BLED-irradiated cell metabolites on cell injury. Our results showed that conditioned medium (CM) from cells irradiated with low-dose BLED (LCM) inhibited apoptosis and increased cell survival. Cell protection-related proteins were identified in cell metabolites of CM and LCM using 2-DE and MALDI-TOF analysis...
January 19, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29345503/effectiveness-of-the-biophysical-barriers-to-the-peridural-fibrosis-in-rat-laminectomy-model
#3
Ibrahim Akkurt, Bulent Bakar, Gungor Cagdas Dincel, Fatma Azize Budak Yıldıran, Mustafa Ogden, Egemen Nursoy, Elif Sari
PURPOSE: Peridural fibrosis which could occur after the spinal surgery could adhere neural tissue closely and may cause to neural entrapment symptoms and require surgical reintervention. AIM OF THE STUDY: Present study was designed to reduce occurrence of peridural fibrosis in rat laminectomy model by using biophysical barriers called hyaluronic acid (HAS) dural barrier, activated polyethylene glycol and polyethylene imine (PEG) dural barrier, and platelet-rich plasma (PRP)...
January 18, 2018: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/29344653/a-novel-variant-of-osteogenesis-imperfecta-type-iv-and-low-serum-phosphorus-level-caused-by-a-val94asp-mutation-in-col1a1
#4
Qi Yang, Hong Xu, Jinsi Luo, Qinle Zhang, Bobo Xie, Sheng Yi, Xiuliang Rong, Jin Wang, Zailong Qin, Tingting Jiang, Li Lin, Yangjin Zuo, Xin Fan
Osteogenesis imperfecta (OI) is a rare congenital disorder characterized by bone fragility and fractures, and associated with bone deformity, short stature, dentin, ligament and blue‑gray eye sclera. OI is caused by a heterozygous mutation in collagen α‑1(I) chain (COL1A1) or collagen α‑2(I) chain (COL1A2) genes that encode α chains of type I collagen. Collagen α chain peptide contains an N‑propeptide, which has a role in assembly and processing of collagen. Point mutations in the N‑propeptide domain appear to trigger OI...
January 16, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29342321/contributions-of-material-properties-and-structure-to-increased-bone-fragility-for-a-given-bone-mass-in-the-ucd-t2dm-rat-model-of-type-2-diabetes
#5
Claire Acevedo, Meghan Sylvia, Eric Schaible, James L Graham, Kimber L Stanhope, Lionel N Metz, Bernd Gludovatz, Ann V Schwartz, Robert O Ritchie, Tamara N Alliston, Peter J Havel, Aaron J Fields
Adults with type 2 diabetes (T2D) have a higher fracture risk for a given bone quantity, but the mechanisms remain unclear. Using a rat model of polygenic obese T2D, we demonstrate that diabetes significantly reduces whole-bone strength for a given bone mass (micro-CT-derived BMC), and we quantify the roles of T2D-induced deficits in material properties versus bone structure, i.e., geometry and microarchitecture. Lumbar vertebrae and ulnae were harvested from 6-month-old lean Sprague-Dawley rats, obese Sprague-Dawley rats, and diabetic obese UCD-T2DM rats (diabetic for 69 ± 7 days; blood glucose >200 mg/dl)...
January 17, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29341894/protective-effects-of-antioxidin-rl-from-odorrana-livida-against-ultraviolet-b-irradiated-skin-photoaging
#6
Di Qin, Wen-Hui Lee, Zhiqin Gao, Weifen Zhang, Meiyu Peng, Tongyi Sun, Yuanyuan Gao
The unavoidable daily exposure of the skin to ultraviolet (UV) B radiation is proven to have deleterious effects. The action mechanism of antioxidin-RL, an antioxidant peptide purified from skin secretions of frog Odorrana livida with amino acid sequence of AMRLTYNRPCIYAT, is well characterized by NMR titration and mutation based on ABTS+ scavenging activities. In order to explore the protective effects of antioxidin-RL against UVB-irradiated skin photoaging, cell uptake assay was used to detect the location of antioxidin-RL molecules serving various biological functions in the cells...
January 13, 2018: Peptides
https://www.readbyqxmd.com/read/29339444/light-hvem-signaling-in-keratinocytes-controls-development-of-dermatitis
#7
Rana Herro, Jr-Wen Shui, Sonja Zahner, Daniel Sidler, Yuko Kawakami, Toshiaki Kawakami, Koji Tamada, Mitchell Kronenberg, Michael Croft
Dermatitis is often associated with an allergic reaction characterized by excessive type 2 responses leading to epidermal acanthosis, hyperkeratosis, and dermal inflammation. Although factors like IL-4, IL-13, and thymic stromal lymphopoietin (TSLP) are thought to be instrumental for the development of this type of skin disorder, other cytokines may be critical. Here, we show that the tumor necrosis factor (TNF) superfamily protein LIGHT (homologous to lymphotoxin, exhibits inducible expression, and competes with HSV glycoprotein D for binding to HVEM, a receptor expressed on T lymphocytes) is required for experimental atopic dermatitis, and LIGHT directly controls keratinocyte hyperplasia, and production of periostin, a matricellular protein that contributes to the clinical features of atopic dermatitis as well as other skin diseases such as scleroderma...
January 16, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29339198/cd90-cardiac-fibroblasts-reduce-fibrosis-of-acute-myocardial-injury-in-rats
#8
Yuqiao Chang, Cixia Li, Yangyang Jia, Peng Chen, Yonglong Guo, Airong Li, Zhikun Guo
OBJECTIVE: To explore the differentiation tendency of CD90+ cardiac fibroblast (CFs) into cardiomyogenic cells in vitro and repair functions in acute myocardial infarction rats. METHODS: CD90+ subpopulation was sorted from rat CFs by flow cytometry. 10 μmoL/L of 5-Azacytosine (5-aza) was used to induce differentiation of CFs into cardiomyogenic cells. An acute myocardial infarction model was prepared by ligation of the rat left anterior descending coronary artery...
January 12, 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29337906/specific-collagen-peptides-improve-bone-mineral-density-and-bone-markers-in-postmenopausal-women-a-randomized-controlled-study
#9
Daniel König, Steffen Oesser, Stephan Scharla, Denise Zdzieblik, Albert Gollhofer
Introduction: Investigations in rodents as well as in vitro experiments have suggested an anabolic influence of specific collagen peptides (SCP) on bone formation and bone mineral density (BMD). The goal of the study was to investigate the effect of 12-month daily oral administration of 5 g SCP vs. placebo (CG: control group) on BMD in postmenopausal women with primary, age-related reduction in BMD. Methods: 131 women were enrolled in this randomized, placebo-controlled double-blinded investigation. The primary endpoint was the change in BMD of the femoral neck and the spine after 12 months...
January 16, 2018: Nutrients
https://www.readbyqxmd.com/read/29336497/effects-of-treatment-with-maraviroc-a-ccr5-inhibitor-on-a-human-hepatic-stellate-cell-line
#10
N Coppola, A Perna, A Lucariello, S Martini, M Macera, M A Carleo, G Guerra, V Esposito, A De Luca
After an acute liver damage, tissue regeneration repairs lesions with degradation of deposed fibrotic material, while mechanisms of tissue restoration are persistently activated following several repeated injuries, inducing deposition of extracellular matrix. (ECM). Factors responsible for ECM remodeling have been identified in a pathway involving a family of zinc-dependent enzyme matrix metalloproteinases (MMPs), together with tissue inhibitor of metalloproteinases (TIMPs). Recent experimental models suggested a role of CCR5 receptor in the genesis of liver fibrosis...
January 16, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29336478/apelin-13-treatment-enhances-the-stability-of-atherosclerotic-plaques
#11
Rodrigo Araujo Fraga-Silva, Hugo Seeman, Fabrizio Montecucco, Analina Raquel da Silva, Fabienne Burger, Fabiana Pereira Costa-Fraga, Léa Anguenot, François Mach, Robson Augusto Souza Dos Santos, Nikolaos Stergiopulos, Rafaela Fernandes da Silva
BACKGROUND: Apelin is an endogenous peptidergic system which modulates cardiovascular function. Recent studies pointed out a fundamental contribution of apelin on atherosclerosis development; however, such reports revealed contradictory data, and to date, it is difficult to accurately define a beneficial or deleterious role. To better understand apelin function on atherosclerosis, we aimed to investigate apelin-13 treatment effects on atherosclerotic plaques composition. DESIGN: Apolipoprotein E gene-deleted mice were fed on Western-type diet for 11 weeks...
January 16, 2018: European Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29336002/body-composition-and-circulating-estradiol-are-the-main-bone-density-predictors-in-healthy-young-and-middle-aged-men
#12
S C Bilha, D Branisteanu, C Buzduga, D Constantinescu, P Cianga, E Anisie, A Covic, M C Ungureanu
PURPOSE: Current fracture risk assessment options in men call for improved evaluation strategies. Recent research directed towards non-classic bone mass determinants have often yielded scarce and conflicting results. We aimed at investigating the impact of novel potential bone mass regulators together with classic determinants of bone status in healthy young and middle-aged men. METHODS: Anthropometric measurements, all-site bone mineral density (BMD) and body composition parameters assessed by dual-energy X-ray absorptiometry and also serum concentrations of (1) the adipokines leptin and resistin, (2) vitamin D and parathormone (PTH), (3) sex hormone binding globulin (SHBG), total testosterone and estradiol (free testosterone was also calculated) and (4) C-terminal telopeptide of type I collagen (CTx) were obtained from 30 apparently healthy male volunteers aged 20-65 years enrolled in this cross-sectional study...
January 16, 2018: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/29335616/roles-of-angiotensin-ii-type-2-receptor-in-mice-with-fetal-growth-restriction
#13
Toshifumi Yamauchi, Masaki Mogi, Harumi Kan-No, Bao-Shuai Shan, Akinori Higaki, Li-Juan Min, Takashi Higaki, Jun Iwanami, Ei-Ichi Ishii, Masatsugu Horiuchi
Our previous report indicated that vascular injury enhances vascular remodeling in fetal growth restriction (FGR) mice. The angiotensin II type 2 receptor (AT2R) is relatively highly expressed in fetal mice. Therefore, we investigated the roles of AT2R in FGR-induced cardiovascular disease using AT2R knockout (AT2KO) mice. Dams (wild-type and AT2KO mice) were fed an isocaloric diet containing 20% protein (NP) or 8% protein (LP) until delivery. Arterial blood pressure, body weight, and histological changes in organs were investigated in offspring...
January 15, 2018: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/29333321/periodontal-wound-healing-following-reciprocal-autologous-root-transplantation-in-class-iii-furcation-defects
#14
Naoshi Takeuchi, Yoshinori Shirakata, Yukiya Shinohara, Kotaro Sena, Kazuyuki Noguchi
Purpose: Furcation involvement in the molars is difficult to treat, and has been recognized as a risk factor for tooth loss. Although periodontal regenerative therapies, including guided tissue regeneration and various types of bone grafts, have been applied to furcation defects, the effects of these treatments are limited, especially in large class III furcation defects. The purpose of this pilot study was to investigate the effect of reciprocal autologous root transplantation on periodontal wound healing and regeneration in class III furcation defects in dogs...
December 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/29333095/cinnamomum-cassia-extracts-suppress-human-lung-cancer-cells-invasion-by-reducing-u-pa-mmp-expression-through-the-fak-to-erk-pathways
#15
Hsing-Chen Wu, Chi-Ting Horng, You-Li Lee, Pei-Ni Chen, Chin-Yin Lin, Chen-Yu Liao, Yih-Shou Hsieh, Shu-Chen Chu
Cinnamomum cassia exhibits antioxidative, apoptotic, and cytostatic properties. These activities have been attributed to the modulation of several biological processes and are beneficial for possible pharmaceutical applications. However, the potential of C. cassia in retarding lung adenocarcinoma cells metastasis remains ambiguous. We determined whether C. cassia extract (CCE) reduces metastasis of human lung adenocarcinoma cells. The results showed that CCE treatment (up to 60 μg/mL) for 24 h exhibited no cytotoxicity on the A549 and H1299 cell lines but inhibited the motility, invasiveness, and migration of these cells by repressing matrix metalloproteinase (MMP)-2 and urokinase-type plasminogen activator (u-PA)...
2018: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29333090/gene-and-protein-expression-profiles-in-a-mouse-model-of-collagen-induced-arthritis
#16
Sun-Yeong Gwon, Ki-Jong Rhee, Ho Joong Sung
The risk of rheumatoid arthritis (RA), an autoimmune disease, in the elderly population increases along with that of atherosclerosis, cardiovascular disease, type 2 diabetes, and Alzheimer's disease. Identifying specific biomarkers for RA can clarify the underlying molecular mechanisms and can aid diagnosis and patient care. To this end, the present study investigated the genes and proteins that are differentially expressed in RA using a mouse collagen-induced arthritis (CIA) model. We performed gene microarray and proteome array analyses using blood samples from the mice and found that 50 genes and 24 proteins were upregulated and 48 genes were downregulated by more than 2-fold in the CIA model relative to the control...
2018: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29331090/enhanced-chondrogenesis-of-mesenchymal-stem-cells-over-silk-fibroin-chitosan-chondroitin-sulfate-three-dimensional-scaffold-in-dynamic-culture-condition
#17
Parinita Agrawal, Krishna Pramanik, Varshini Vishwanath, Amit Biswas, Akalabya Bissoyi, Pradeep Kumar Patra
Chondroitin sulfate (Ch) is one of the main structural components of cartilage tissue, therefore, its presence in tissue engineered scaffold is expected to enhance cartilage regeneration. Previously, silk fibroin/chitosan (SF/CS) blend was proven to be a potential biomaterial for tissue development. In this study, the effect of Ch on physicochemical and biological properties of SF/CS blend was investigated and scaffolds with 0.8 wt% Ch was found to be favorable. The scaffolds possess pore size of 37-212 µm, contact angle 46...
January 13, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29330848/cultured-allogeneic-fibroblast-injection-versus-fibroblasts-cultured-on-amniotic-membrane-scaffold-for-dystrophic-epidermolysis-bullosa-treatment
#18
H Moravvej, F Abdollahimajd, M-H Naseh, Z Piravar, E Abolhasani, N Mozafari, H Niknejad
BACKGROUND: Different methods of fibroblast application have been examined to treat recessive dystrophic epidermolysis bullosa (RDEB). OBJECTIVE: To compare the effects of intradermal injection of cultured allogeneic fibroblasts in healing RDEB wounds with that of fibroblasts seeded on amniotic membrane scaffolds (FAMS) or standard wound care (SWC) with Vaseline gauze as controls. MATERIALS &METHODS: Seven patients were recruited, and seven wounds were assessed in each patient: three wounds were treated with injection of intradermal fibroblasts, three were treated with FAMS, and one was dressed with SWC...
January 12, 2018: British Journal of Dermatology
https://www.readbyqxmd.com/read/29330835/international-guidelines-for-groin-hernia-management
#19
(no author information available yet)
INTRODUCTION: Worldwide, more than 20 million patients undergo groin hernia repair annually. The many different approaches, treatment indications and a significant array of techniques for groin hernia repair warrant guidelines to standardize care, minimize complications, and improve results. The main goal of these guidelines is to improve patient outcomes, specifically to decrease recurrence rates and reduce chronic pain, the most frequent problems following groin hernia repair. They have been endorsed by all five continental hernia societies, the International Endo Hernia Society and the European Association for Endoscopic Surgery...
January 12, 2018: Hernia: the Journal of Hernias and Abdominal Wall Surgery
https://www.readbyqxmd.com/read/29330408/collagen-type-1-accelerates-healing-of-ruptured-fetal-membranes
#20
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
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