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https://www.readbyqxmd.com/read/28931178/the-oral-dipeptidyl-peptidase-4-inhibitor-sitagliptin-increases-circulating-levels-of-stromal-derived-factor-1-alpha
#1
Athanasia K Papazafiropoulou, Nikolaos Papanas, Aikaterini Trikkalinou, Evaggelos Fousteris, Andreas Melidonis
Recent studies have demonstrated that stromal derived factor-1α (SDF-1α) is a substrate of dipeptidyl-peptidase-4 (DPP-4) inhibitors. It has also been shown that SDF-1α shares anti-apoptotic as well as nephroprotective properties and exerts a beneficial effect in the cardiovascular system. Therefore, the aim of this study was to estimate the effect of treatment with the DDP-4 inhibitor sitagliptin on SDF-1α levels in subjects with type 2 diabetes mellitus (T2D). Overall, 32 patients (16 males) with T2D, mean age (±SD) 67...
September 20, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28918101/silver-diamine-fluoride-remineralized-artificial-incipient-caries-in-permanent-teeth-after-bacterial-ph-cycling-in-vitro
#2
Kulnipa Punyanirun, Thanida Yospiboonwong, Thansinee Kunapinun, Panida Thanyasrisung, Chutima Trairatvorakul
OBJECTIVES: To investigate the remineralizing effect of 38% silver diamine fluoride (SDF) application on enamel artificial caries in adjunct to 1000ppm fluoride toothpaste compared with fluoride toothpaste alone by analyzing the mineral density, depth of remineralization, and remineralization percentage of the lesions. METHODS: Eighteen artificial caries slabs were created from the proximal surfaces of nine chemically demineralized premolars. The slabs were scanned by Micro-Computed Tomography (Micro-CT) to determine the baseline mineral density of the initial lesions and randomly allocated into 2 groups...
September 13, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28917899/polysaccharides-from-brown-algae-sargassum-duplicatum-the-structure-and-anticancer-activity-in-vitro
#3
Roza V Usoltseva, Stanislav D Anastyuk, Natalia M Shevchenko, Valerii V Surits, Artem S Silchenko, Vladimir V Isakov, Tatiana N Zvyagintseva, Pham Duc Thinh, Svetlana P Ermakova
The laminaran SdL and fucoidan SdF were isolated from brown algae Sargassum duplicatum. SdL was 1,3;1,6-β-d-glucan (1,3:1,6=6:1) with a main chain, represented by 1,3-linked glucose residues, due to NMR spectroscopy data. Single glucose residues could form branches at C6. Unusual structure of fucoidan SdF was studied by chemical and enzymatic methods, NMR spectroscopy of desulfated and deacetylated polysaccharide and mass spectrometry of fucoidan fragments labeled with (18)O. Fucoidan was sulfated (31.7%) and acetylated galactofucan (Fuc:Gal∼1:1) with a main chain of 1,4-linked alternating α-l-fucose and β-d-galactose residues...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28906052/forest-biomass-productivity-and-carbon-cycling-along-a-rainfall-gradient-in-west-africa
#4
Sam Moore, Stephen Adu-Bredu, Akwasi Duah-Gyamfi, Shalom D Addo-Danso, Forzia Ibrahim, Armel T Mbou, Agnès de Grandcourt, Riccardo Valentini, Giacomo Nicolini, Gloria Djagbletey, Kennedy Owusu-Afriyie, Agne Gvozdevaite, Imma Oliveras, Maria C Ruiz-Jaen, Yadvinder Malhi
Net primary productivity (NPP) is one of the most important parameters in describing the functioning of any ecosystem and yet it arguably remains a poorly quantified and understood component of carbon cycling in tropical forests, especially outside of the Americas. We provide the first comprehensive analysis of NPP and its carbon allocation to woody, canopy and root growth components at contrasting lowland West African forests spanning a rainfall gradient. Using a standardised methodology to study evergreen (EF), semi-deciduous (SDF), dry forests (DF) and woody savanna (WS), we find that (i) climate is more closely related with above and belowground C stocks than with NPP (ii) total NPP is highest in the SDF site, then the EF followed by the DF and WS and that (iii) different forest types have distinct carbon allocation patterns whereby SDF allocate in excess of 50% to canopy production and the DF and WS sites allocate 40-50% to woody production...
September 14, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28903379/extracorporeal-shock-wave-treatment-attenuated-left-ventricular-dysfunction-and-remodeling-in-mini-pig-with-cardiorenal-syndrome
#5
Jiunn-Jye Sheu, Hani E E Ali, Ben-Chung Cheng, Hsin-Ju Chiang, Pei-Hsun Sung, Kuan-Hung Chen, Chih-Chao Yang, Yen-Ta Chen, John Y Chiang, Pao-Yuan Lin, Sarah Chua, Han-Tan Chai, Sheng-Ying Chung, Cheuk-Kwan Sun, Hon-Kan Yip
This study tested the hypothesis that extracorporeal shock wave (ECSW) treatment can improve ischemia-induced left ventricular (LV) dysfunction in mini-pig with co-existing chronic kidney disease (CKD). LV ischemia in mini-pigs was induced by applying an ameroid constrictor over mid-left anterior descending artery (LAD), while model of CKD was established by right nephrectomy with partial ligation of left renal arterioles 2 weeks before LAD constriction. Thirty mini-pigs were randomly divided into group 1 (sham-control), group 2 (LV-ischemia), group 3 (LV-ischemia + CKD), Group 4 [LV-ischemia + ECSW (applied 1200 shots at 0...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28891959/the-pi3k%C3%AE-inhibitor-idelalisib-inhibits-homing-in-an-in-vitro-and-in-vivo-model-of-b-all
#6
Etai Adam, Hye Na Kim, Eun Ji Gang, Caitlin Schnair, Solomon Lee, Solah Lee, Sajad Khazal, Osanna Kosoyan, Marina Konopleva, Chintan Parekh, Deepa Bhojwani, Alan S Wayne, Hisham Abdel-Azim, Nora Heisterkamp, Yong-Mi Kim
The quest continues for targeted therapies to reduce the morbidity of chemotherapy and to improve the response of resistant leukemia. Adhesion of acute lymphoblastic leukemia (ALL) cells to bone marrow stromal cells triggers intracellular signals that promote cell-adhesion-mediated drug resistance (CAM-DR). Idelalisib, an U.S. Food and Drug Administration (FDA)-approved PI3Kδ-specific inhibitor has been shown to be effective in CLL in down-regulating p-Akt and prolonging survival in combination with Rituximab; herein we explore the possibility of its use in B ALL and probe the mechanism of action...
September 10, 2017: Cancers
https://www.readbyqxmd.com/read/28888414/use-of-silver-diamine-fluoride-for-the-maintenance-of-dental-prostheses-in-a-high-caries-risk-patient-a-medical-management-approach
#7
Lola Giusti, Cathrine Steinborn, Maya Steinborn
A technique for using silver diamine fluoride (SDF) as part of a regimen to help maintain dental prostheses in a patient with scleroderma and at high risk of caries is presented. Medically compromised, xerostomic, or elderly patients generally face greater risk of caries and specifically with prosthetic retainer teeth. SDF is a minimally invasive solution to this problem. A technique is described for using SDF to arrest and prevent new caries with the goal of maintaining fixed and removable prostheses and supporting teeth in a cost-effective manner...
September 6, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28886159/directional-migration-of-mesenchymal-stem-cells-under-an-sdf-1%C3%AE-gradient-on-a-microfluidic-device
#8
Siwan Park, Hwanseok Jang, Byung Soo Kim, Changmo Hwang, Gi Seok Jeong, Yongdoo Park
Homing of peripheral stem cells is regulated by one of the most representative homing factors, stromal cell-derived factor 1 alpha (SDF-1α), which specifically binds to the plasma membrane receptor CXCR4 of mesenchymal stem cells (MSCs) in order to initiate the signaling pathways that lead to directional migration and homing of stem cells. This complex homing process and directional migration of stem cells have been mimicked on a microfluidic device that is capable of generating a chemokine gradient within the collagen matrix and embedding endothelial cell (EC) monolayers to mimic blood vessels...
2017: PloS One
https://www.readbyqxmd.com/read/28884952/soluble-dietary-fiber-reduces-trimethylamine-metabolism-via-gut-microbiota-and-co-regulates-host-ampk-pathways
#9
Qian Li, Tao Wu, Rui Liu, Min Zhang, Ruijun Wang
SCOPE: Evidence from animal experiments and clinical medicine suggest that high dietary fiber intake, followed by gut microbiota-mediated fermentation, decreases trimethylamine (TMA) metabolism, the mechanism of which, however, remains unclear. The objective of this analysis was to evaluate, using mice fed with red meat, the effects of soluble dietary fiber (SDF) intervention on TMA metabolism. METHODS AND RESULTS: Low- or high-dose soluble dietary fiber (SDF) from natural wheat bran (LN and HN, low- and high-dose natural SDF), fermented wheat bran (LF and HF, low- and high-dose fermented SDF), and steam-exploded wheat bran (LE and HE, low- and high-dose exploded SDF groups) were used to examine whether SDF interventions in mice fed with red meat can alter TMA and trimethylamine N-oxide (TMAO) metabolism by gut microbial communities in a diet-specific manner...
September 8, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28884706/biological-features-of-bone-marrow-mesenchymal-stromal-cells-in-childhood-acute-lymphoblastic-leukemia
#10
Stella Genitsari, Eftichia Stiakaki, Chryssoula Perdikogianni, Georgia Martimianaki, Iordanis Pelagiadis, Margarita Pesmatzoglou, Maria Kalmanti, Helen Dimitriou
OBJECTIVE: Mesenchymal Stromal Cells (MSC) have a supportive role in hematopoiesis and as components of the bone marrow microenvironment may present alterations during ALL and be affected by chemotherapeutic agents. We examined the biological and functional characteristics of MSC at ALL diagnosis and treatment and their effect on MSC qualitative properties. MATERIALS AND METHODS: Immunophenotypic characterization, evaluation of clonogenicity and proliferative capacity were performed...
September 8, 2017: Turkish Journal of Haematology: Official Journal of Turkish Society of Haematology
https://www.readbyqxmd.com/read/28875842/targeting-cxcl12-cxcr4-axis-in-tumor-immunotherapy
#11
Weiqiang Zhou, Shanchun Guo, Mingli Liu, Matthew E Burow, Guangdi Wang
Chemokines, which have chemotactic abilities, are comprised of over 50 family members. Through binding to the 7-transmembrane domain of G-protein-coupled receptors (GPCR), they function in immune cells by trafficking and regulating cell prolif¬eration, differentiation, activation, and migration, homing under both physiologic and pathologic conditions. The alpha-chemokine receptor CXCR4 for the alpha-chemokine stromal cell-derived-factor-1 (SDF-1) is most widely expressed by tumors. CXCL12/CXCR4 axis is a major culprit for human tumor because of its crucial role in tumor initiation and progression by activating a number of signaling pathways, such as ERK1/2, ras, PLC/ MAPK, p38 MAPK, and SAPK/ JNK, as well as regulating cancer stem cells...
August 29, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28873725/improved-gel-functionality-of-myofibrillar-proteins-incorporation-with-sugarcane-dietary-fiber
#12
Xinbo Zhuang, Wangang Zhang, Rui Liu, Yafu Liu, Lujuan Xing, Minyi Han, Zhuang-Li Kang, Xing-Lian Xu, Guang-Hong Zhou
The effects of sugarcane dietary fiber (SDF) on the gelation properties of porcine myofibrillar proteins (MP) were studied to understand its mechanism of action in improving gel functionality. Rheological tests on all composite gels (MP with SDF) showed the visco-elastic nature of MP, but the G' significantly increased with contents of SDF and with particle size (P<0.05). However, the δ exhibited the opposite effect. Light microscopy suggested that SDF affected moisture distribution in the gel by drawing water from MP and homogenously embedded in gelation...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28870902/communicate-or-die-a-model-for-hpv-and-hpv-cscs-and-their-interactions-with-sdf-1%C3%AE
#13
Frederic Jungbauer, Christoph Aderhold, Richard Birk, Karl Hoermann, Benedikt Kramer, Beatrice Kuhlin, Carsten Thorn, Claudia Umbreit, Anne Lammert
BACKGROUND/AIM: Cancer stem cells (CSCs) are suspected of being a reason for limited therapy in head and neck squamous cell carcinoma (HNSCC). Stromal cell-derived factor-1α (SDF-1α) plays a critical role in the communication between CSCs and their microenvironment. We investigated the influence of SDF-1α on HPV+/HPV- SCC cell lines to find an approach of explanation for the superior prognosis of HPV+ HNSCCs. MATERIALS AND METHODS: We evaluated the expression of CD44/CXCR4 on HPV+/HPV- SCC cell lines and monitored the influence of SDF-1α on proliferation, morphology and migration of HPV+/HPV- SCCs...
September 2017: Anticancer Research
https://www.readbyqxmd.com/read/28869696/comparison-and-functional-characterization-of-peripheral-blood-mononuclear-cells-isolated-from-filarial-lymphedema-and-endemic-normals-of-a-south-indian-population
#14
Abel Arul Nathan, Madhulika Dixit, Subash Babu, Anand Setty Balakrishnan
OBJECTIVE: The underlying problem in lymphatic filariasis is irreversible swelling of the limbs (lymphedema), which is a unique feature of lymphatic insufficiency. It is still unclear whether the natural ability of lymphatics to form functional lymphatic vasculature is achieved or attenuated in the lymphedemal pathology. Clinical studies have clearly shown that circulating lymphatic progenitors (CLPs), a subset of bone-marrow derived mononuclear cells (PBMCs), contribute to post-natal lymph vasculogenesis...
September 4, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28868340/e-selectin-and-sdf-1-regulate-metastatic-trafficking-of-breast-cancer-cells-within-the-bone
#15
Trevor T Price, Dorothy A Sipkins
E-selectin is a key mediator of breast cancer cell (BCC) metastatic entry into the bone and stromal-derived factor 1 (SDF-1) is a critical molecular anchor for BCCs within discrete pro-dormancy bone marrow (BM) niches. Small-molecule inhibitors blocked metastatic entry and mobilized established disease from BM, suggesting a new treatment strategy to prevent breast cancer relapse.
2017: Molecular & Cellular Oncology
https://www.readbyqxmd.com/read/28865546/reproductive-outcomes-of-testicular-versus-ejaculated-sperm-for-intracytoplasmic-sperm-injection-among-men-with-high-levels-of-dna-fragmentation-in-semen-systematic-review-and-meta-analysis
#16
Sandro C Esteves, Matheus Roque, Cara K Bradley, Nicolás Garrido
OBJECTIVE: To compare sperm DNA fragmentation (SDF) levels between testicular and ejaculated sperm and to evaluate outcomes of intracytoplasmic sperm injection (ICSI) with the use of testicular (Testi-ICSI) versus ejaculated (Ejac-ICSI) sperm in nonazoospermic men with high SDF. DESIGN: Systematic review and meta-analysis. SETTING: Not applicable. PATIENT(S): Normo- and oligozoospermic men with high levels of SDF in semen subjected to Testi-ICSI or Ejac-ICSI...
September 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28864209/danshensu-accelerates-angiogenesis-after-myocardial-infarction-in-rats-and-promotes-the-functions-of-endothelial-progenitor-cells-through-sdf-1%C3%AE-cxcr4-axis
#17
Ying Yin, Jialin Duan, Chao Guo, Guo Wei, Yanhua Wang, Yue Guan, Fei Mu, Minna Yao, Miaomiao Xi, Aidong Wen
The present study was performed to investigate the potential role of Danshensu in therapeutic angiogenesis in ischemic myocardium and endothelial progenitor cells (EPCs) function. The rat model of myocardial infarction (MI) injury was induced by left anterior descending coronary artery ligation for 14 days. Danshensu significantly alleviated myocardial ischemia injury by ameliorating left ventricular function and reducing infarct size. Furthermore, Danshensu potentiated post-ischemia neovascularization as evidenced by increased microvessel density in infarction boundary zone, as well as the expression of marker proteins vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF)...
August 31, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28855566/regulation-of-focal-adhesion-turnover-in-sdf-1%C3%AE-stimulated-migration-of-mesenchymal-stem-cells-in-neural-differentiation
#18
Ya'nan Hu, Junhou Lu, Xiaojing Xu, Jingya Lyu, Huanxiang Zhang
Directed migration of the transplanted mesenchymal stem cells (MSCs) to the lesion sites plays a pivotal role in the efficacy of cell-based therapy. Our previous study demonstrates that MSCs under varying neural differentiation states possess different migratory capacities in response to chemoattractants. However, the underlying mechanism has not been fully addressed. Herein, we show that the assembly and turnover of focal adhesions, the phosphorylation of FAK and paxillin, and the reorganisation of F-actin in MSCs are closely related to their differentiation states in response to SDF-1α...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28846922/interaction-of-zap70-and-cxcr4-receptor-at-lamellipodia-that-determines-the-directionality-during-jurkat-t-cells-chemotaxis
#19
Chia-Yun Wu, Yi-Ying Tsai, Sheng-Yi Chen, Yu-Ping Lin, Jyh-Wei Shin, Chia-Ching Wu, Bei-Chang Yang
Directional migration of T-lymphocytes is a key process during immune activation and is tightly regulated both temporally and spatially. The initial cell membrane protrusion at a particular site is critical for determining the direction of cell migration. In this study, we found that ZAP-70 protein appeared not only at the margin of the spreading areas of polarized Jurkat T cells but also formed clusters near the center of the cell body on a fibronectin plate. Specifically, some pZAP-70 was located at the lamellipodia/filopodia and was closely associated with the most extended membrane contact...
August 25, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28846469/randomized-clinical-trial-of-12-and-38-silver-diamine-fluoride-treatment
#20
M H T Fung, D Duangthip, M C M Wong, E C M Lo, C H Chu
This 30-mo randomized clinical trial compared the effectiveness of 2 concentrations (12% or 38%) of silver diamine fluoride (SDF) and 2 periodicity of application (once or twice a year) in arresting cavitated dentin caries in primary teeth. Children aged 3 to 4 y who had at least 1 active cavitated caries lesion were enrolled and randomly allocated into 4 groups for intervention. Group 1 had 12% SDF applied annually (every 12 mo), group 2 had 12% SDF applied semiannually (every 6 mo), group 3 had 38% SDF applied annually, and group 4 had 38% SDF applied semiannually...
August 1, 2017: Journal of Dental Research
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