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https://www.readbyqxmd.com/read/28327149/release-kinetics-and-mitogenic-capacity-of-collagen-barrier-membranes-supplemented-with-secretome-of-activated-platelets-the-in-vitro-response-of-fibroblasts-of-the-periodontal-ligament-and-the-gingiva
#1
Eva-Maria Mozgan, Michael Edelmayer, Klara Janjić, Manuela Pensch, Michael B Fischer, Andreas Moritz, Hermann Agis
BACKGROUND: Platelet preparations can stimulate the healing process and have mitogenic properties. We hypothesized that collagen barrier membranes (CBM), clinically used in guided bone regeneration and guided tissue regeneration, can serve as carriers for platelet secretome. METHODS: Secretome was generated from washed platelets and unwashed platelets (washed/unwashed PSEC) and lyophilized onto CBM. Overall appearance of CBM was evaluated by scanning electron microscopy...
March 21, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28322869/scaffold-free-high-throughput-generation-of-quiescent-valvular-microtissues
#2
Annelies Roosens, Inès Puype, Ria Cornelissen
AIMS: The major challenge of working with valvular interstitial cells in vitro is the preservation or recovery of their native quiescent state. In this study, a biomimetic approach is used which aims to engineer small volume, high quality valve microtissues, having a potential in regenerative medicine and as a relevant 3D in vitro model to provide insights into valve (patho)biology. METHODS AND RESULTS: To form micro-aggregates, porcine valvular interstitial cells were seeded in agarose micro-wells and cultured in medium supplemented with 250μM Ascorbic Acid 2-phosphate for 22days...
March 17, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28321425/adult-cells-combined-with-platelet-rich-plasma-for-tendon-healing-cell-source-options
#3
Eva Rubio-Azpeitia, Pello Sánchez, Diego Delgado, Isabel Andia
BACKGROUND: The combination of cells with platelet-rich plasma (PRP) may fulfill tendon deficits and help overcome the limited ability of tendons to heal. PURPOSE: To examine the suitability of 3 human cell types in combination with PRP and the potential impact of the tenocyte-conditioned media (CM) to enhance tendon healing. STUDY DESIGN: Controlled laboratory study. METHODS: Tenocytes, bone marrow-derived mesenchymal stem cells, and skin fibroblasts were cultured in 3-dimensional PRP hydrogels supplemented or not with CM, and cell proliferation and migration were examined...
February 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28300665/grape-seed-extract-ameliorates-bleomycin-induced-mouse-pulmonary-fibrosis
#4
Qi Liu, Jun-Xia Jiang, Ya-Nan Liu, Yan Guan, Wei Zhao, Yong-Liang Jia, Xin-Wei Dong, Yun Sun, Qiang-Min Xie
Pulmonary fibrosis is common in a variety of inflammatory lung diseases, such as interstitial pneumonia, chronic obstructive pulmonary disease, and silicosis. There is currently no effective clinical drug treatment. It has been reported that grape seed extracts (GSE) has extensive pharmacological effects with minimal toxicity. Although it has been found that GSE can improve the lung collagen deposition and fibrosis pathology induced by bleomycin in rat, its effects on pulmonary function, inflammation, growth factors, matrix metalloproteinases and epithelial-mesenchymal transition remain to be researched...
March 11, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/28292351/effects-of-selenium-on-fusarium-growth-and-associated-fermentation-products-and-the-relationship-with-chondrocyte-viability
#5
Hong Yin, Yan Zhang, Feng Zhang, Jin Tao Hu, Yu Meng Zhao, Bo Lun Cheng
This study determined the effects of selenium on the growth of Fusarium strains and the effects of products extracted from the fungal cultures on relevant indicators of chondrocytes injury. The results showed that selenium supplementation resulted in differential effects on the mycelial growth of the strains. Levels of the chondrocyte injury indicators, including cell viability, proteoglycan and type II collagen contents and their mRNA expressions, were all reduced to varying degrees when the chondrocytes were incubated with fermentation extracts, the inhibitory effect varied depending on selenium content supplemented to fungal culture media...
February 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28285576/decellularized-bone-extracellular-matrix-and-human-dental-pulp-stem-cells-as-a-construct-for-bone-regeneration
#6
Francesco Paduano, Massimo Marrelli, Noura Alom, Mahetab Amer, Lisa J White, Kevin M Shakesheff, Marco Tatullo
Dental pulp tissue represents a source of mesenchymal stem cells that have a strong differentiation potential towards the osteogenic lineage. The objective of the current study was to examine in vitro osteogenic induction of dental pulp stem cells (DPSCs) cultured on hydrogel scaffolds derived from decellularized bone extracellular matrix (bECM) compared to collagen type I (Col-I), the major component of bone matrix. DPSCs in combination with bECM hydrogels were cultured under three different conditions: basal medium, osteogenic medium and medium supplemented with growth factors (GFs) and cell growth, mineral deposition, gene and protein expression were investigated...
March 13, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28283030/impaired-osteogenesis-of-t1dm-bone-marrow-derived-stromal-cells-and-periosteum-derived-cells-and-their-differential-in-vitro-responses-to-growth-factor-rescue
#7
Tera M Filion, Jordan D Skelly, Henry Huang, Dale L Greiner, David C Ayers, Jie Song
BACKGROUND: Poor bone quality, increased fracture risks, and impaired bone healing are orthopedic comorbidities of type 1 diabetes (T1DM). Standard osteogenic growth factor treatments are inadequate in fully rescuing retarded healing of traumatic T1DM long bone injuries where both periosteal and bone marrow niches are disrupted. We test the hypotheses that osteogenesis of bone marrow-derived stromal cells (BMSCs) and periosteum-derived cells (PDCs), two critical skeletal progenitors in long bone healing, are both impaired in T1DM and that they respond differentially to osteogenic bone morphogenetic proteins (BMPs) and/or insulin-like growth factor-1 (IGF-1) rescue...
March 11, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28272348/zinc-prevents-the-development-of-diabetic-cardiomyopathy-in-db-db-mice
#8
Shudong Wang, Bowei Wang, Yuehui Wang, Qian Tong, Quan Liu, Jian Sun, Yang Zheng, Lu Cai
Diabetic cardiomyopathy (DCM) is highly prevalent in type 2 diabetes (T2DM) patients. Zinc is an important essential trace metal, whose deficiency is associated with various chronic ailments, including vascular diseases. We assessed T2DM B6.BKS(D)-Leprdb/J (db/db) mice fed for six months on a normal diet containing three zinc levels (deficient, adequate, and supplemented), to explore the role of zinc in DCM development and progression. Cardiac function, reflected by ejection fraction, was significantly decreased, along with increased left ventricle mass and heart weight to tibial length ratio, in db/db mice...
March 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28270195/lapachol-a-compound-targeting-pyrimidine-metabolism-ameliorates-experimental-autoimmune-arthritis
#9
Raphael S Peres, Gabriela B Santos, Nerry T Cecilio, Valquíria A P Jabor, Michael Niehues, Bruna G S Torres, Gabriela Buqui, Carlos H T P Silva, Teresa Dalla Costa, Norberto P Lopes, Maria C Nonato, Fernando S Ramalho, Paulo Louzada-Júnior, Thiago M Cunha, Fernando Q Cunha, Flavio S Emery, Jose C Alves-Filho
BACKGROUND: The inhibition of pyrimidine biosynthesis by blocking the dihydroorotate dehydrogenase (DHODH) activity, the prime target of leflunomide (LEF), has been proven to be an effective strategy for rheumatoid arthritis (RA) treatment. However, a considerable proportion of RA patients are refractory to LEF. Here, we investigated lapachol (LAP), a natural naphthoquinone, as a potential DHODH inhibitor and addressed its immunosuppressive properties. METHODS: Molecular flexible docking studies and bioactivity assays were performed to determine the ability of LAP to interact and inhibit DHODH...
March 7, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28266663/the-effect-of-collagen-hydrolysates-from-silver-carp-hypophthalmichthys-molitrix-skin-on-uv-induced-photoaging-in-mice-molecular-weight-affects-skin-repair
#10
Hongdong Song, Mengfei Meng, Xiaofeng Cheng, Bo Li, Chengtao Wang
The use of collagen hydrolysates (CHs) as a nutraceutical agent in skin aging has gained increasing attention. Here, the effects of various doses and molecular weights of CH from silver carp skin on photoaging in mice were investigated. The ingestion of CH at 50, 100 and 200 mg per kg body weight led to a dose-dependent increase in the hydroxyproline, hyaluronic acid and moisture contents of the skin, but it had no significant effect on the mice body weight, or on the spleen or thymus index. Furthermore, ingesting CH with lower (LMCH, 200-1000 Da, 65%) and higher molecular weight (HMCH, >1000 Da, 72%) significantly increased the skin components and improved the antioxidative enzyme activities in both serum and skin (p < 0...
March 7, 2017: Food & Function
https://www.readbyqxmd.com/read/28263432/the-effect-of-cell-debris-within-biologic-scaffolds-upon-the-macrophage-response
#11
Ricardo Londono, Jenna L Dziki, Eric Haljasmaa, Neill Turner, Cynthia Leifer, Stephen F Badylak
All biomaterials, including biologic scaffolds composed of extracellular matrix (ECM), elicit a host immune response when implanted. The type and intensity of this response depends in part upon the thoroughness of decellularization and removal of cell debris from the source tissue. Pro-inflammatory responses have been associated with negative downstream remodeling events including scar tissue formation, encapsulation, and seroma formation. The relative effects of specific cellular components upon the inflammatory response are not known...
March 6, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28262327/immunohistochemical-response-in-rats-of-beta-tricalcium-phosphate-tcp-with-or-without-bmp-2-in-the-production-of-collagen-matrix-critical-defects
#12
Eloá Rodrigues Luvizuto, Júlio César Silva de Oliveira, Pedro Henrique Silva Gomes-Ferreira, Cassiano Costa Silva Pereira, Leonardo Perez Faverani, Cristina Antoniali, Roberta Okamoto
This study aimed to assess the biological response of BMP-2 (bone morphogenetic protein-2) in supplementation with β-tricalcium phosphate (TCP) as a carrier in the bone healing of surgical defects in rats' calvaria. A critical-size defect (5mm in diameter) was filled with β-TCP alone or added with that plus 5mg of BMP-2 at 5, 15, and 30 postoperative days. Histomorphometric and immunohistochemical (osteocalcin, collagen type I, and metalloproteinase-9) analysis was performed to assess the features of bone healing...
March 2, 2017: Acta Histochemica
https://www.readbyqxmd.com/read/28262301/effects-of-alcohol-on-postoperative-adhesion-formation-in-ischemic-myocardium-and-pericardium
#13
Nassrene Y Elmadhun, Ashraf A Sabe, Antonio D Lassaletta, Rahul S Dalal, Frank W Sellke
BACKGROUND: Postoperative formation of adhesions increases risk of complications during cardiac reoperations. We previously demonstrated that swine supplemented with vodka had a significant reduction in adhesions at sternotomy after previous thoracotomy. This follow-up study was conducted to determine reproducibility and the mechanism for adhesion reduction in swine supplemented with ethanol. METHODS: An ameroid constrictor was placed in the left circumflex in 14 male Yorkshire swine to induce chronic myocardial ischemia through left minithoracotomy...
March 2, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28254515/hereditary-cerebral-small-vessel-disease-and-stroke
#14
REVIEW
Christian Baastrup Søndergaard, Jørgen Erik Nielsen, Christine Krarup Hansen, Hanne Christensen
Cerebral small vessel disease is considered hereditary in about 5% of patients and is characterized by lacunar infarcts and white matter hyperintensities on MRI. Several monogenic hereditary diseases causing cerebral small vessel disease and stroke have been identified. The purpose of this systematic review is to provide a guide for determining when to consider molecular genetic testing in patients presenting with small vessel disease and stroke. CADASIL, CARASIL, collagen type IV mutations (including PADMAL), retinal vasculopathy with cerebral leukodystrophy, Fabry disease, hereditary cerebral hemorrhage with amyloidosis, and forkhead box C1 mutations are described in terms of genetics, pathology, clinical manifestation, imaging, and diagnosis...
February 22, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28248693/calcium-supplementation-attenuates-disruptions-in-calcium-homeostasis-during-exercise
#15
Vanessa D Sherk, Sarah J Wherry, Daniel W Barry, Karen L Shea, Pamela Wolfe, Wendy M Kohrt
An exercise-induced decrease in serum ionized calcium (iCa) is thought to trigger an increase in parathyroid hormone (PTH), which can stimulate bone resorption. PURPOSE: The purpose of this study was to determine whether taking a chewable calcium (Ca) supplement 30 minutes before exercise mitigates disruptions in Ca homeostasis and bone resorption in competitive male cyclists. METHODS: Fifty-one men aged 18 to 45 y were randomized to take either 1000 mg Ca (CA) or placebo (PL) 30 minutes before a simulated 35-km cycling time trial...
February 28, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28247345/isolation-culture-and-immunostaining-of-skeletal-muscle-myofibers-from-wildtype-and-nestin-gfp-mice-as-a-means-to-analyze-satellite-cell
#16
Pascal Stuelsatz, Paul Keire, Zipora Yablonka-Reuveni
Multinucleated myofibers, the functional contractile units of adult skeletal muscle, harbor mononuclear Pax7(+) myogenic progenitors on their surface between the myofiber basal lamina and plasmalemma. These progenitors, known as satellite cells, are the primary myogenic stem cells in adult muscle. This chapter describes our laboratory protocols for isolating, culturing, and immunostaining intact myofibers from mouse skeletal muscle as a means for studying satellite cell dynamics. The first protocol discusses myofiber isolation from the flexor digitorum brevis (FDB) muscle...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28244627/impact-of-maternal-and-postnatal-zinc-dietary-status-on-the-prostate-of-pubescent-and-adult-rats
#17
Lucas F Camora, Ana Priscila G Silva, Sérgio A A Santos, Luis A Justulin, Juliana E Perobelli, Luis Fernando Barbisan, Wellerson R Scarano
Zinc is important for cell physiology and alteration of its levels during development can modulate a series of biological events. The aim of this study was to investigate whether dietary zinc deficiency or supplementation during morphogenesis and early postnatal development could interfere in prostate maturation. Pregnant rats were exposed to a standard diet (NZ:35mg Zn/kg chow), low-zinc diet (LZ:3mg of Zn/kg chow) and zinc-supplemented diet (HZ:180mg/Kg chow) from gestational day 10 (GD10) through postnatal day 21 (PND21)...
February 28, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28244315/oral-ingestion-of-collagen-hydrolysate-leads-to-the-transportation-of-highly-concentrated-gly-pro-hyp-and-its-hydrolyzed-form-of-pro-hyp-into-the-bloodstream-and-skin
#18
Misato Yazaki, Yukihiko Ito, Masayoshi Yamada, Spyros Goulas, Sachiyuki Teramoto, Masa-Aki Nakaya, Shigeo Ohno, Kohji Yamaguchi
Collagen hydrolysate is a well-known dietary supplement for the treatment of skin aging; however, its mode of action remains unknown. Previous studies have shown that the oral ingestion of collagen hydrolysate leads to elevated levels of collagen-derived peptides in the blood, but whether these peptides reach the skin remains unclear. Here, we analyzed the plasma concentration of collagen-derived peptides after ingestion of high tripeptide containing collagen hydrolysate in humans. We identified 17 types of collagen-derived peptides transiently, with a particular enrichment in Gly-Pro-Hyp...
March 8, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28231026/late-administration-of-a-palladium-lipoic-acid-complex-poly-mva-modifies-cardiac-mitochondria-but-not-functional-or-structural-manifestations-of-radiation-induced-heart-disease-in-a-rat-model
#19
Vijayalakshmi Sridharan, John W Seawright, Francis J Antonawich, Merrill Garnett, Maohua Cao, Preeti Singh, Marjan Boerma
Exposure of the heart to ionizing radiation can cause adverse myocardial remodeling. In small animal models, local heart irradiation causes persistent alterations in cardiac mitochondrial function and swelling. POLY-MVA is a dietary supplement that contains a palladium lipoic acid complex that targets mitochondrial complex I and has been demonstrated to have greater redox potential than lipoic acid alone. POLY-MVA improves mitochondrial function and anti-oxidant enzyme activity in the aged rat heart. In this study, we tested whether POLY-MVA can mitigate cardiac effects of ionizing radiation...
February 23, 2017: Radiation Research
https://www.readbyqxmd.com/read/28224106/impact-of-high-dose-vitamin-c-on-platelet-function
#20
Bassem M Mohammed, Kimberly W Sanford, Bernard J Fisher, Erika J Martin, Daniel Contaifer, Urszula Osinska Warncke, Dayanjan S Wijesinghe, Charles E Chalfant, Donald F Brophy, Alpha A Fowler Iii, Ramesh Natarajan
AIM: To examine the effect of high doses of vitamin C (VitC) on ex vivo human platelets (PLTs). METHODS: Platelet concentrates collected for therapeutic or prophylactic transfusions were exposed to: (1) normal saline (control); (2) 0.3 mmol/L VitC (Lo VitC); or (3) 3 mmol/L VitC (Hi VitC, final concentrations) and stored appropriately. The VitC additive was preservative-free buffered ascorbic acid in water, pH 5.5 to 7.0, adjusted with sodium bicarbonate and sodium hydroxide...
February 4, 2017: World Journal of Critical Care Medicine
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