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https://www.readbyqxmd.com/read/28218918/transgenic-expression-of-human-apol1-risk-variants-in-podocytes-induces-kidney-disease-in-mice
#1
Pazit Beckerman, Jing Bi-Karchin, Ae Seo Deok Park, Chengxiang Qiu, Patrick D Dummer, Irfana Soomro, Carine M Boustany-Kari, Steven S Pullen, Jeffrey H Miner, Chien-An A Hu, Tibor Rohacs, Kazunori Inoue, Shuta Ishibe, Moin A Saleem, Matthew B Palmer, Ana Maria Cuervo, Jeffrey B Kopp, Katalin Susztak
African Americans have a heightened risk of developing chronic and end-stage kidney disease, an association that is largely attributed to two common genetic variants, termed G1 and G2, in the APOL1 gene. Direct evidence demonstrating that these APOL1 risk alleles are pathogenic is still lacking because the APOL1 gene is present in only some primates and humans; thus it has been challenging to demonstrate experimental proof of causality of these risk alleles for renal disease. Here we generated mice with podocyte-specific inducible expression of the APOL1 reference allele (termed G0) or each of the risk-conferring alleles (G1 or G2)...
February 20, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28211947/insulin-like-growth-factor-1-promotes-osteogenic-differentiation-and-collagen-i-alpha-2-synthesis-via-induction-of-mrna-binding-protein-larp6-expression
#2
Yue Guo, Chen-Yi Tang, Xiao-Fei Man, Hao-Neng Tang, Jun Tang, Ci-La Zhou, Shu-Wen Tan, Min Wang, Yun-Zhi Feng, Hou-De Zhou
This study explored the mechanism underlying the stimulation of collagen synthesis and osteoblastic differentiation by insulin-like growth factor 1 (IGF1) in primary mouse osteoblasts. Primary mouse calvarial osteoblasts were cultured and treated with various doses of IGF1 before transfection with siRNA targeting the collagen type I alpha 2 (Col1a2) or La ribonucleoprotein domain family member 6 (Larp6) genes. Alkaline phosphatase (ALP) activity, osteocalcin staining, alizarin red quantification and the expression level of runt-related transcription factor 2 (RUNX2) were performed to assess the differentiation of pre-osteoblasts...
February 17, 2017: Development, Growth & Differentiation
https://www.readbyqxmd.com/read/28205268/the-effect-of-delta-like-1-homologue-on-the-proliferation-and-odontoblastic-differentiation-in-human-dental-pulp-stem-cells
#3
Shengcai Qi, Yanhong Yan, Yue Wen, Jialiang Li, Jing Wang, Fubo Chen, Xiaoshan Tang, Guangwei Shang, Yuanzhi Xu, Raorao Wang
INTRODUCTION: This study aimed to investigate the functions of delta-like homologue 1 (DLK1) in the proliferation and differentiation of human dental pulp stem cells (hDPSCs). METHODS: Immunohistochemical analysis was used to determine the expression of alkaline phosphatase (ALP), dentin sialophosphoprotein (DSPP), DLK1, NOTCH1 and p-ERK1/2 in the mouse first maxillary molar. Recombinant lentivirus was constructed to overexpress DLK1 stably in hDPSCs. The cell viability and proliferation of hDPSCs were examined by CCK8 and EdU incorporation assay respectively...
February 15, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28197984/quantifying-bacterial-attachment-and-detachment-using-leaching-solutions-of-various-ionic-strengths-after-bacterial-pulse
#4
Nag-Choul Choi, Jae-Woo Choi, Kyu-Sang Kwon, Sang-Gil Lee, Soonjae Lee
In this study, we quantified the attachment and detachment of bacteria during transport in order to elucidate the contributions of reversible attachment on bacterial breakthrough curves. The first set of breakthrough experiment was performed for a laboratory sand column using leaching solutions of deionized water and mineral salt medium (MSM) of 200 mM with reference to KCl solution by employing Pseudomonas putida as a model bacterium. In the second set of experiment, the ionic strengths of leaching solutions immediately after bacterial pulse were lowered to tenfold and 100-fold diluted system (2 and 20 mM MSM) to focus on the influence of physicochemical factor...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28182625/viability-of-primary-osteoblasts-after-treatment-with-tenofovir-alafenamide-lack-of-cytotoxicity-at-clinically-relevant-drug-concentrations
#5
Christian Callebaut, Yang Liu, Darius Babusis, Adrian Ray, Michael Miller, Kathryn Kitrinos
Tenofovir alafenamide (TAF) is a phosphonoamidate prodrug of the nucleotide HIV reverse transcriptase inhibitor tenofovir (TFV). TAF is approved for the treatment of HIV-1 infection as part of the single-tablet regimen containing elvitegravir, cobicistat, emtricitabine, and TAF. When dosed once-daily, TAF results in approximately 90% lower levels of plasma TFV and a 4-fold increase in intracellular TFV-diphosphate (TFV-DP) in PBMCs compared with the TFV prodrug tenofovir disoproxil fumarate (TDF). Several antiretrovirals, including TDF, have been associated with bone mineral density decreases in patients; the effect of clinically relevant TAF concentrations on primary osteoblast viability was therefore assessed in vitro...
2017: PloS One
https://www.readbyqxmd.com/read/28178186/exogenous-pthrp-repairs-the-damaged-fracture-healing-of-pthrp-mice-and-accelerates-fracture-healing-of-wild-mice
#6
Yinhe Wang, Xin Fang, Chun Wang, Congzhu Ding, Hua Lin, Anlong Liu, Lei Wang, Yang Cao
Bone fracture healing is a complicated physiological regenerative process initiated in response to injury and is similar to bone development. To demonstrate whether an exogenous supply of parathyroid hormone-related protein (PTHrP) helps in bone fracture healing, closed mid-diaphyseal femur fractures were created and stabilized with intramedullary pins in eight-week-old wild-type (WT) PTHrP+/+ and PTHrP+/- mice. After administering PTHrP for two weeks, callus tissue properties were analyzed at one, two, and four weeks post-fracture (PF) by various methods...
February 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28169026/fluorescence-spectroscopy-and-parallel-factor-analysis-as-a-dissolved-organic-monitoring-tool-to-assess-treatment-performance-in-drinking-water-trains
#7
M Vera, S Cruz, M R Boleda, J Mesa, J Martín-Alonso, S Casas, O Gibert, J L Cortina
Fluorescence excitation emission matrix (FEEM) spectroscopy was used to evaluate its applicability as a tool to track dissolved organic matter (DOM) in a drinking water treatment plant (DWTP) that incorporates a conventional line (consisting in ozonation and GAC filtration) and a membrane-based line (consisting in ultrafiltration, reverse osmosis and mineralization) working in parallel. Seven sampling points within the different process stages were characterized monthly during 2014. A global Parallel Factor Analysis (PARAFAC) was used to pull out underlying organic fractions from the fluorescence spectra...
February 3, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28168252/antiscaling-efficacy-of-caco3-and-caso4-on-polyethylene-glycol-peg-modified-reverse-osmosis-membranes-in-the-presence-of-humic-acid-interplay-of-membrane-surface-properties-and-water-chemistry
#8
Jessica R Ray, Whitney Wong, Young-Shin Jun
Mineral scaling persists in many water treatment processes. More specifically, it can significantly reduce the efficacy of aromatic polyamide (PA) membranes during reverse osmosis (RO) water treatment. Previous studies have integrated hydrophilic materials, such as polyethylene glycol (PEG), onto RO membranes to combat scaling from generally hydrophobic feed water constituents; however, there are still outstanding knowledge gaps regarding the interplay of the modified membrane surface chemistry and the water chemistry in complex RO feed waters...
February 7, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28142110/role-of-two-sided-crosstalk-between-no-and-h2s-on-improvement-of-mineral-homeostasis-and-antioxidative-defense-in-sesamum-indicum-under-lead-stress
#9
Rayhaneh Amooaghaie, Faezeh Zangene-Madar, Shekoofeh Enteshari
H2S and NO are two important gasotransmitters that modulate stress responses in plants. There are the contradictory data on crosstalk between NO and H2S in the studies. Hence, in the present study, the role of interplay between NO and H2S was assessed on the Pb tolerance of Sesamum indicum using pharmacological and biochemical approaches. Results revealed that Pb stress reduced the plant growth and the content of photosynthetic pigments and Fv/Fm ratio, increased the lipid peroxidation and the H2O2 content, elevated the endogenous contents of nitric oxide (NO), H2S and enhanced the activities of antioxidant enzymes (except APX)...
January 28, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28137405/contraception-for-adolescents-with-chronic-rheumatic-diseases
#10
Benito Lourenço, Katia T Kozu, Gabriela N Leal, Marco F Silva, Elisabeth G C Fernandes, Camila M P França, Fernando H C Souza, Clovis A Silva
Contraception is an important issue and should be a matter of concern in every medical visit of adolescent and young patients with chronic rheumatic diseases. This narrative review discusses contraception methods in adolescents with juvenile systemic lupus erythematosus (JSLE), antiphospholipid syndrome (APS), juvenile idiopathic arthritis (JIA) and juvenile dermatomyositis (JDM). Barrier methods are safe and their use should be encouraged for all adolescents with chronic rheumatic diseases. Combined oral contraceptives (COC) are strictly prohibited for JSLE and APS patients with positive antiphospholipid antibodies...
January 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28132711/nephronectin-stimulates-the-differentiation-of-mdpc-23%C3%A2-cells-into-an-odontoblast-like-phenotype
#11
Jia Tang, Takashi Saito
INTRODUCTION: The present study investigated the in vitro effects of nephronectin (Npnt) on the proliferation, differentiation, and mineralization of a rat odontoblast-like cell line (MDPC-23 cells). METHODS: MDPC-23 cells were cultured on Npnt-coated polystyrene or in the presence of soluble Npnt. Cell proliferation was analyzed using a Cell Counting Kit-8 kit (Dojindo, Kumamoto, Japan). Alkaline phosphatase (ALP) activity was quantified using an ALP activity assay...
February 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28131691/scapula-fracture-incidence-in-reverse-total-shoulder-arthroplasty-using-screws-above-or-below-metaglene-central-cage-clinical-and-biomechanical-outcomes
#12
Justin C Kennon, Caroline Lu, Meghan E McGee-Lawrence, Lynn A Crosby
BACKGROUND: Reverse total shoulder arthroplasty (RTSA) is a viable treatment option for rotator cuff tear arthropathy but carries a complication risk of scapular fracture. We hypothesized that using screws above the central glenoid axis for metaglene fixation creates a stress riser contributing to increased scapula fracture incidence. Clinical type III scapular fracture incidence was determined with screw placement correlation: superior screw vs. screws placed exclusively below the glenoid midpoint...
January 25, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28130181/differential-response-of-bone-and-kidney-to-acei-in-db-db-mice-a-potential-effect-of-captopril-on-accelerating-bone-loss
#13
Yan Zhang, Xiao-Li Li, Nan-Nan Sha, Bing Shu, Yong-Jian Zhao, Xin-Luan Wang, Hui-Hui Xiao, Qi Shi, Man-Sau Wong, Yong-Jun Wang
The components of renin-angiotensin system (RAS) are expressed in the kidney and bone. Kidney disease and bone injury are common complications associated with diabetes. This study aimed to investigate the effects of an angiotensin-converting enzyme inhibitor, captopril, on the kidney and bone of db/db mice. The db/db mice were orally administered by gavage with captopril for 8weeks with db/+ mice as the non-diabetic control. Serum and urine biochemistries were determined by standard colorimetric methods or ELISA...
January 24, 2017: Bone
https://www.readbyqxmd.com/read/28128382/reproducible-in-vitro-model-for-dystrophic-calcification-of-cardiac-valvular-interstitial-cells-insights-into-the-mechanisms-of-calcific-aortic-valvular-disease
#14
Heather A Cirka, Johana Uribe, Vivian Liang, Frederick J Schoen, Kristen L Billiar
Calcific aortic valvular disease (CAVD) is the most prevalent valvular pathology in the United States. Development of a pharmacologic agent to slow, halt, or reverse calcification has proven to be unsuccessful as still much remains unknown about the mechanisms of disease initiation. Although in vitro models of some features of CAVD exist, their utility is limited by the inconsistency of the size and time course of the calcified cell aggregates. In this study, we introduce and verify a highly reproducible in vitro method for studying dystrophic calcification of cardiac valvular interstitial cells, considered to be a key mechanism of clinical CAVD...
January 27, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/28128304/targeting-osteoblastic-casein-kinase-2-interacting-protein-1-to-enhance-smad-dependent-bmp-signaling-and-reverse-bone-formation-reduction-in-glucocorticoid-induced-osteoporosis
#15
Jin Liu, Changwei Lu, Xiaohao Wu, Zongkang Zhang, Jie Li, Baosheng Guo, Defang Li, Chao Liang, Lei Dang, Xiaohua Pan, Songlin Peng, Aiping Lu, Baoting Zhang, Ge Zhang
The underlying mechanism of the reduced bone formation during the development of glucocorticoid-induced osteoporosis (GIO) remains unclear. Here, we found that the highly expressed CKIP-1 together with lowly expressed total and phosphorylated Smad1/5 in bone samples was accompanied by either the reduced serum bone formation markers in GIO patients or the decreased bone formation in GIO mice. In vitro studies showed that the highly expressed CKIP-1 could promote Smad1 ubiquitination to suppress the Smad-dependent BMP signaling and inhibit osteogenic differentiation and mineral deposition in MC3T3-E1 cells during glucocorticoid treatment...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28123530/effects-of-the-overexpression-of-ifitm5-and-ifitm5-c-14c-t-mutation-on-human-osteosarcoma-cells
#16
Bao-Yan Liu, Yan-Qin Lu, Feng Han, Yong Wang, Xin-Kai Mo, Jin-Xiang Han
The present study aimed to investigate the effects of overexpression of interferon-induced transmembrane protein 5 (IFITM5) and IFITM5 c.-14C>T mutation on osteogenic differentiation, and the proliferation, migration and invasion of SaOS2 cells. SaOS2 cells were transfected with plasmids containing wild type IFITM5 (W) or IFITM5 containing the c.-14C>T mutation (MU). The mRNA and protein expression levels of IFITM5 in SaOS2 cells were respectively detected by reverse transcription quantitative polymerase chain reaction and western blotting...
January 2017: Oncology Letters
https://www.readbyqxmd.com/read/28123180/magnesium-prevents-phosphate-induced-vascular-calcification-via-trpm7-and-pit-1-in-an-aortic-tissue-culture-model
#17
Tomohiro Sonou, Masaki Ohya, Mitsuru Yashiro, Asuka Masumoto, Yuri Nakashima, Teppei Ito, Toru Mima, Shigeo Negi, Hiromi Kimura-Suda, Takashi Shigematsu
Previous clinical and experimental studies have indicated that magnesium may prevent vascular calcification (VC), but mechanistic characterization has not been reported. This study investigated the influence of increasing magnesium concentrations on VC in a rat aortic tissue culture model. Aortic segments from male Sprague-Dawley rats were incubated in serum-supplemented high-phosphate medium for 10 days. The magnesium concentration in this medium was increased to demonstrate its role in preventing VC, which was assessed by imaging and spectroscopy...
January 26, 2017: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/28113034/biomimetic-enamel-regeneration-mediated-by-leucine-rich-amelogenin-peptide
#18
S Y Kwak, A Litman, H C Margolis, Y Yamakoshi, J P Simmer
We report here a novel biomimetic approach to the regeneration of human enamel. The approach combines the use of inorganic pyrophosphate (PPi) to control the onset and rate of enamel regeneration and the use of leucine-rich amelogenin peptide (LRAP), a nonphosphorylated 56-amino acid alternative splice product of amelogenin, to regulate the shape and orientation of growing enamel crystals. This study builds on our previous findings that show LRAP can effectively guide the formation of ordered arrays of needle-like hydroxyapatite (HA) crystals in vitro and on the known role mineralization inhibitors, like PPi, play in the regulation of mineralized tissue formation...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28112280/tenofovir-alafenamide-fumarate-for-the-treatment-of-hiv-infection
#19
R Sampath, J Zeuli, S Rizza, Z Temesgen
Tenofovir alafenamide fumarate is a recently developed prodrug of tenofovir, a nucleotide analogue reverse transcriptase inhibitor with potent inhibitory activity against HIV. The utility of a previously developed tenofovir prodrug, tenofovir disoproxil fumarate, had been hampered by renal and bone mineral adverse events. Tenofovir alafenamide fumarate overcomes the shortcomings of tenofovir disoproxil fumarate by delivering high intracellular concentrations of the parent drug, tenofovir, while substantially reducing systemic exposure...
November 2016: Drugs of Today
https://www.readbyqxmd.com/read/28111597/magnetic-study-of-a-mixture-of-magnetite-and-metallic-iron-in-indoor-dust-samples
#20
Beata Górka-Kostrubiec, Iga Szczepaniak-Wnuk
Magnetite in mixture with metallic iron in indoor dust samples was examined using several magnetic analyses, thermomagnetic curves of the magnetic susceptibility and the induced magnetization vs. temperature, hysteresis loops, and first-order reversal curves. The study of the magnetic properties was supplemented by the analysis of chemical elements and electron microscopic observation. The metallic iron in the mixture affects the values of hysteresis parameters, decreasing coercivity (Bc) and increasing saturation magnetization (Ms), and it is responsible for the magnetic enhancement of magnetic susceptibility...
2017: Air Quality, Atmosphere, & Health
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