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https://www.readbyqxmd.com/read/28445820/the-synthesis-and-properties-of-linear-a-%C3%AF-d-%C3%AF-a-type-organic-small-molecule-containing-diketopyrrolopyrrole-terminal-units
#1
Shanshan Zhang, Qingfen Niu, Tao Sun, Yang Li, Tianduo Li, Haixia Liu
A novel linear A-π-D-π-A-type organic small molecule Ph2(PDPP)2 consisting diketopyrrolopyrrole (DPP) as acceptor unit, biphenylene as donor unit and acetylene unit as π-linkage has been successfully designed and synthesized. Its corresponding thermal, photophysical and electrochemical properties as well as the photoinduced charge-separation process were investigated. Ph2(PDPP)2 exhibits high thermal stability and it can be soluble in common organic solvents such as chloroform and tetrahydrofuran. The photophysical properties show that DPP2Ph2 harvests sunlight over the entire visible spectrum range in the thin-film state (300-800nm)...
April 20, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28444830/gene-expression-reveals-evidence-for-egfr-dependent-proximal-distal-limb-patterning-in-a-myriapod
#2
Ralf Janssen
Evolution of segmented limbs is one of the key innovations of Arthropoda, allowing development of functionally specific specialized head and trunk appendages, a major factor behind their unmatched evolutionary success. Proximodistal limb patterning is controlled by two regulatory networks in the vinegar fly Drosophila melanogaster, and other insects. The first is represented by the function of the morphogens Wingless (Wg) and Decapentaplegic (Dpp); the second by the EGFR-signaling cascade. While the role of Wg and Dpp has been studied in a wide range of arthropods representing all main branches, that is, Pancrustacea (= Hexapoda + Crustacea), Myriapoda and Chelicerata, investigation of the potential role of EGFR-signaling is restricted to insects (Hexapoda)...
April 26, 2017: Evolution & Development
https://www.readbyqxmd.com/read/28442890/justification-of-disintegration-testing-beyond-current-fda-criteria-using-in-vitro-and-in-silico-models
#3
Lukas Uebbing, Lukas Klumpp, Gregory K Webster, Raimar Löbenberg
Drug product performance testing is an important part of quality-by-design approaches, but this process often lacks the underlying mechanistic understanding of the complex interactions between the disintegration and dissolution processes involved. Whereas a recent draft guideline by the US Food and Drug Administration (FDA) has allowed the replacement of dissolution testing with disintegration testing, the mentioned criteria are not globally accepted. This study provides scientific justification for using disintegration testing rather than dissolution testing as a quality control method for certain immediate release (IR) formulations...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28440586/comparison-of-preoperative-quantitative-magnetic-resonance-imaging-and-clinical-assessment-of-deep-pain-perception-as-prognostic-tools-for-early-recovery-of-motor-function-in-paraplegic-dogs-with-intervertebral-disk-herniations
#4
A Wang-Leandro, J S Siedenburg, M K Hobert, P Dziallas, K Rohn, V M Stein, A Tipold
BACKGROUND: Prognostic tools to predict early postoperative motor function recovery (MFR) after thoracolumbar intervertebral disk herniation (IVDH) in paraplegic dogs represent an opportunity to timely implement novel therapies that could shorten recovery times and diminish permanent neurological dysfunctions. HYPOTHESIS: Fractional anisotropy (FA) values obtained using diffusion tensor imaging have a higher prognostic value than a lesion extension ratio in T2-weighted images (T2W-LER) and clinical assessment of deep pain perception (DPP) for MFR...
April 25, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28440488/dipeptidyl-peptidase%C3%A2-4-inhibitor-sitagliptin-prevents-high-glucose%C3%A2-induced-apoptosis-via-activation-of-amp%C3%A2-activated-protein-kinase-in-endothelial-cells
#5
Chao Wu, Shunying Hu, Nanping Wang, Jianwei Tian
Diabetes mellitus (DM), which is a chronic metabolic disorder, is the primary risk factor of life‑threatening vascular complications. Endothelial apoptosis is important in the development of the initial vascular lesion preceding the diabetic disease. Sitagliptin is a dipeptidyl peptidase‑4 (DPP‑4) inhibitor and extensively used in the clinical treatment of DM. DPP‑4 inhibitors have been demonstrated to be beneficial in the improvement of endothelial homeostasis, however the molecular mechanism by which they exhibit these effects remains to be elucidated...
April 21, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28440199/anti-hyperglycemic-agents-for-the-treatment-of-type-2-diabetes-mellitus-role-in-cardioprotection-during-the-last-decade
#6
Duygu Kocyigit, Kadri Murat Gurses, Muhammed Ulvi Yalcin, Lale Tokgozoglu
Type 2 diabetic patients are known to have a tendency to develop cardiovascular (CV) disease (CVD), and related unfavourable outcomes such as heart failure, myocardial infarction (MI), cerebrovascular events (eg. stroke), and related mortality. Long- term clinical trials have revealed contradictory findings regarding the relationship between glycemic control and CV benefits due to variations in the key characteristics of the study population. During the last decade, number of pharmacological agents used for glucose- lowering in the treatment of type 2 diabetes mellitus (T2DM) has increased owing to the introduction of dipeptidyl peptidase- IV (DPP- IV) inhibitors, glucagon- like peptide- 1 (GLP- 1) receptor agonists, and sodium-glucose co-transporter 2 (SGLT- 2) inhibitors...
April 23, 2017: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/28435939/conjugated-d-a-porphyrin-dimers-for-solution-processed-bulk-heterojunction-organic-solar-cells
#7
Tianqi Lai, Xuebin Chen, Liangang Xiao, Lin Zhang, Tianxiang Liang, Xiaobin Peng, Yong Cao
Three conjugated D-A porphyrin dimers (DPP-ZnP-E)2, (DPP-ZnP-E)2-2T and (DPP-ZnP-E)2-Ph linked with diethynylene, diethynylene-dithiophene and diethynylene-phenylene have been developed for bulk heterojunction solar cells with high power conversion efficiencies of 4.50%, 5.50% and 6.42%, respectively, when blended with PC61BM as the electron acceptor material.
April 24, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28433470/daily-supplementation-of-dietary-protein-improves-the-metabolic-effects-of-glp-1-based-pharmacotherapy-in-lean-and-obese-rats
#8
Elizabeth G Mietlicki-Baase, Kieran Koch-Laskowski, Lauren E McGrath, Joanna Krawczyk, Tram Pham, Rinzin Lhamo, David J Reiner, Matthew R Hayes
Glucagon-like peptide-1 (GLP-1) is an incretin hormone released from intestinal L-cells in response to food entering into the gastrointestinal tract. GLP-1-based pharmaceuticals improve blood glucose regulation and reduce feeding. Specific macronutrients, when ingested, may trigger GLP-1 secretion and enhance the effects of systemic sitagliptin, a pharmacological inhibitor of DPP-IV (an enzyme that rapidly degrades GLP-1). In particular, macronutrient constituents found in dairy foods may act as potent secretagogues for GLP-1, and acute preclinical trials show that ingestion of dairy protein may represent a promising adjunct behavioral therapy in combination with sitagliptin...
April 19, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28432754/intraclass-differences-in-the-risk-of-hospitalisazion-for-heart-failure-among-type-2-diabetic-patients-initiating-a-dipeptydil-peptidase-4-inhibitor-or-a-sulphonylurea-results-from-the-osmed-health-db-registry
#9
Gian Paolo Fadini, Stefania Saragoni, Pierluigi Russo, Luca Degli Esposti, Saula Vigili de Kreutzenberg, Mario Melazzini, Angelo Avogaro
AIMS: Heart failure (HF) is frequent in type 2 diabetes (T2D) and several glucose-lowering medications may increase HF risk. In the SAVOR-TIMI trial, patients on Saxagliptin experienced a 27% higher risk of hospitalisation for HF (HHF). In a retrospective study on 127,555 patients, we showed that DPP-4i therapy was associated with a lower HHF risk than sulphonylurea (SU) therapy. We herein re-analyzed such data to evaluate intraclass differences among DPP-4i and SU. MATERIALS AND METHODS: We included T2D patients initiating DPP-4i or SU alone or in combination with metformin...
April 21, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28432752/incretin-based-glucose-lowering-medications-and-the-risk-for-acute-pancreatitis-and-or-pancreatic-cancer-risk-reassuring-data-from-cardio-vascular-outcome-trials
#10
Michael A Nauck, Juris J Meier, Wolfgang E Schmidt
Incretin-based medications (glucagon-like peptide-1 [GLP-1] receptor agonists and inhibitors of dipeptidyl peptidase-4 [DPP-4] are glucose-lowering drugs approved and introduced after 2006 (1). Although both classes of drugs appeared to be relatively safe based on results from clinical trials and standard animal toxicology studies, epidemiological data (2, 3) and histological findings (4) in genetically modified rodents exposed to such agents have raised concern that pancreatitis and pancreatic cancer may be long-term risks associated with this therapy...
April 22, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28431666/glp-1-receptor-agonists-and-heart-failure-in-diabetes
#11
André J Scheen
The prevalence of heart failure (HF) is increasing in patients with type 2 diabetes (T2D), and glucose-lowering agents have distinctive effects on the risk of developing HF that requires hospitalization. Such an increased risk has been consistently reported with thiazolidinediones (glitazones) and perhaps also with the dipeptidyl peptidase (DPP)-4 inhibitor saxagliptin (at least in SAVOR - TIMI 53), whereas a markedly decreased risk was highlighted with the sodium - glucose cotransporter type 2 (SGLT2) inhibitor empagliflozin in EMPA-REG OUTCOME...
April 2017: Diabetes & Metabolism
https://www.readbyqxmd.com/read/28426230/photophysics-and-excited-state-properties-of-cyclometalated-iridium-iii-platinum-ii-and-iridium-iii-iridium-iii-bimetallic-complexes-bridged-by-dipyridylpyrazine
#12
Yang-Jin Cho, So-Yoen Kim, Chang Min Choi, Nam Joon Kim, Chul Hoon Kim, Dae Won Cho, Ho-Jin Son, Chyongjin Pac, Sang Ook Kang
We investigated the electrochemical and excited-state properties of 2,3-bis(2-pyridyl)pyrazine (dpp)-bridged bimetallic complexes, (L)2Ir-dpp-PtCl [1, L = 2-(4',6'-difluorophenyl)pyridinato-N,C(2) (dfppy); 2, L = 2-phenylpyridinato-N,C(2) (ppy)] and [(L)2Ir]2(dpp) [3, L = dfppy; 4, L = ppy] compared to monometallic complexes, (L)2Ir-dpp (5, L = dfppy; 6, L = ppy) and dpp-PtCl (dpp-Pt(II)Cl2; 7). The single-crystal X-ray crystallographic structures of 1, 3, 5, and 6 showed that 1 and 3 have approximately coplanar structures of the dpp unit, while the noncoordinated pyridine ring of dpp in 5 and 6 is largely twisted with respect to the pyrazine ring...
April 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28422330/genetic-relationships-among-female-fertility-disorders-female-fertility-traits-and-productivity-of-holstein-dairy-cows-in-the-early-lactation-period
#13
E Gernand, S König
Fertility health disorders from the early lactation period including retained placenta (REPLA), metritis (MET), corpus luteum persistence (CLP), anoestria/acyclia (AOEAC) and ovarial cysts (OC), as well as overall disease categories (disorders during the postpartal period (DPP), ovary infertility (OINF), overall trait definition "fertility disorders" (FD)), were used to estimate genetic (co)variance components with female fertility and test-day traits. The disease data set comprised 25,142 Holstein cows from parities 1, 2 and 3 resulting in 43,584 lactations...
April 19, 2017: Journal of Animal Breeding and Genetics, Zeitschrift Für Tierzüchtung und Züchtungsbiologie
https://www.readbyqxmd.com/read/28420715/role-of-soluble-and-membrane-bound-dipeptidylpeptidase-4-in-diabetic-nephropathy
#14
Ahmed A Hasan, Berthold Hocher
Diabetic nephropathy is one of the most frequent, devastating, and costly complications of diabetes. The available therapeutic approaches are limited. Dipeptidyl peptidase type 4 (DPP-4) inhibitors represent a new class of glucose-lowering drugs that might have in addition reno-protective properties. DPP-4 exists in two forms: a plasma membrane-bound form and a soluble form, and can exert many biological actions mainly through its peptidase activity and interaction with extracellular matrix components. The kidneys have the highest DPP-4 expression level in mammalians...
April 18, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/28420649/a-sandwich-elisa-for-measurement-of-the-primary-glucagon-like-peptide-1-metabolite
#15
Nicolai J Wewer Albrechtsen, Ali Asmar, Frederik Jensen, Signe Törang, Lene Simonsen, Rune E Kuhre, Meena Asmar, Simon Veedfald, Astrid Plamboeck, Filip K Knop, Tina Vilsboll, Sten Madsbad, Michael A Nauck, Carolyn F Deacon, Jens Bulow, Jens J Holst, Bolette Hartmann
Glucagon-like peptide-1 (GLP-1) is an incretin hormone secreted from the gastrointestinal tract. It is best known for its glucose-dependent insulinotropic effects GLP-1 is secreted in its intact (active) form (7-36NH2) but is rapidly degraded by the dipeptidyl peptidase 4 (DPP-4) enzyme, converting >90% to the primary metabolite (9-36NH2) before reaching the targets via the circulation. Although originally thought to be inactive or antagonistic, GLP-1 9-36NH2 may have independent actions, and it is therefore relevant to be able to measure it...
April 18, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28418262/adherence-and-persistence-in-patients-with-type-2-diabetes-mellitus-newly-initiating-canagliflozin-dapagliflozin-dpp-4s-or-glp-1s-in-the-united-states
#16
Jennifer Cai, Victoria Divino, Chakkarin Burudpakdee
OBJECTIVE: Sodium-glucose co-transporter 2 inhibitors were first approved in the US in 2013; therefore, real-world (RW) studies describing outcomes are limited. This retrospective study evaluated adherence and persistence among patients initiating canagliflozin (CANA), dapagliflozin (DAPA), GLP-1 agonists (GLP-1s) and DPP-4 inhibitors (DPP-4s) over a 12-month follow-up from a US managed care perspective. METHODS: Patients newly initiating CANA, DAPA, GLP-1s, or DPP-4s from 2/1/2014-6/30/2014 were identified from the QuintilesIMS PharMetrics Plus Database...
April 18, 2017: Current Medical Research and Opinion
https://www.readbyqxmd.com/read/28417426/telehealth-delivery-of-the-diabetes-prevention-program-to-rural-communities
#17
Liane M Vadheim, Katherine Patch, Sarah M Brokaw, Dorota Carpenedo, Marcene K Butcher, Steven D Helgerson, Todd S Harwell
The Centers for Disease Control and Prevention, State and Local Health Departments, and other organizations in the USA are working to increase population access to the Diabetes Prevention Program (DPP) lifestyle intervention. Delivering the DPP through telehealth videoconference may increase access to this intervention, particularly in rural communities. The purpose of this study was to compare participation, monitoring of diet and physical activity, and weight loss in participants receiving the intervention on-site and those participating virtually through telehealth...
April 17, 2017: Translational Behavioral Medicine
https://www.readbyqxmd.com/read/28411801/optimization-of-gold-nanoparticle-based-real-time-colorimetric-assay-of-dipeptidyl-peptidase-iv-activity
#18
Hasan Saad Aldewachi, Nicola Woodroofe, Simon Turega, Philip H E Gardiner
Dipeptidyl peptidase IV (DPP-IV also referred to as CD-26) is a serine protease enzyme with remarkable diagnostic and prognostic value in a variety of health and disease conditions. Herein, we describe a simple and real-time colorimetric assay for DPP-IV/CD-26 activity based on the aggregation of gold nanoparticles (AuNPs) functionalized with the peptide substrates: Gly-Pro-Asp-Cys (GPDC) or Val-Pro-ethylene diamine-Asp-Cys (VP-ED-DC). Cleavage of the substrates by DPP-IV resulted in aggregation of the AuNPs with accompanying color change in the solution from red to blue that was monitored using either a UV-visible spectrophotometer or by the naked eye...
July 1, 2017: Talanta
https://www.readbyqxmd.com/read/28409887/a-blue-diketopyrrolopyrrole-sensitizer-with-high-efficiency-in-nio-based-dye-sensitized-solar-cells
#19
Fabrice Odobel, Yoann Farre, Mahfoudh Raissi, Arnaud Fihey, Yann Pellegrin, Errol Blart, Denis Jacquemin
We have prepared a series of four new diketopyrrolopyrroles (DPPs) based sensitizers that exhibit high molar extinction coefficients, extended absorption into the long wavelengths and well suited photoredox properties to act as sensitizers in p-DSSCs. These new DPP dyes, composed of a thienyl DPP core, are substituted on one end either by a thiophene carboxylic (Th) or a 4,4'-((phenyl)aza)dibenzoic acid as anchoring group and, on the other extremity, either by a proton or a naphthalene diimide (NDI) moiety...
April 14, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28408925/combination-therapy-with-a-sodium-glucose-cotransporter-2-inhibitor-and-a-dipeptidyl-peptidase-4-inhibitor-additively-suppresses-macrophage-foam-cell-formation-and-atherosclerosis-in-diabetic-mice
#20
Michishige Terasaki, Munenori Hiromura, Yusaku Mori, Kyoko Kohashi, Hideki Kushima, Makoto Ohara, Takuya Watanabe, Olov Andersson, Tsutomu Hirano
Dipeptidyl peptidase-4 inhibitors (DPP-4is), in addition to their antihyperglycemic roles, have antiatherosclerotic effects. We reported that sodium-glucose cotransporter 2 inhibitors (SGLT2is) suppress atherosclerosis in a glucose-dependent manner in diabetic mice. Here, we investigated the effects of combination therapy with SGLT2i and DPP-4i on atherosclerosis in diabetic mice. SGLT2i (ipragliflozin, 1.0 mg/kg/day) and DPP-4i (alogliptin, 8.0 mg/kg/day), either alone or in combination, were administered to db/db mice or streptozotocin-induced diabetic apolipoprotein E-null (Apoe(-/-) ) mice...
2017: International Journal of Endocrinology
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