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https://www.readbyqxmd.com/read/28334929/large-scale-preparation-of-a-specific-xanthone-from-swertia-mussotii-and-evaluation-of-its-%C3%AE-glucosidase-inhibitory-activity
#1
Tao Chen, Hongmei Li, Chen Chen, Lixin Wei, Yulin Li
Large-scale preparation and α-glucosidase inhibitory activity of a specific xanthone swertioside from Swertia mussotii were investigated in this study. Firstly, an efficient method was successfully established by liquid-liquid extraction, preparative high-performance liquid chromatography and sephadex LH-20 for large-scale preparation of swertioside. The recovery of swertioside reached 92.0%. Secondly, in vitro α-glucosidase inhibition experiment showed that swertioside had good inhibition close to acarbose...
March 17, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28324049/piloting-a-remission-strategy-in-type-2-diabetes-results-of-a-randomized-controlled-trial
#2
Natalia McInnes, Ada Smith, Rose Otto, Jeffrey Vandermey, Zubin Punthakee, Diana Sherifali, Kumar Balasubramanian, Stephanie Hall, Hertzel C Gerstein
Context: Medical strategies targeting remission of type 2 diabetes have not been systematically studied. Objective: This trial assessed the feasibility, safety and potential to induce remission of a short-term intensive metabolic strategy. Design: A randomized, parallel, open-label pilot trial in 83 participants followed for 52 weeks. Setting: Ambulatory care. Participants: Patients with type 2 diabetes of up to 3 years in duration...
March 15, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28322143/in-vitro-and-in-vivo-antidiabetic-evaluation-of-selected-culinary-medicinal-mushrooms-agaricomycetes
#3
Varinder Singh, Gurleen Kaur Bedi, Richa Shri
Management of type 2 diabetes by delaying or preventing glucose absorption using natural products is gaining significant attention. Edible mushrooms are well documented for their nutritional and medicinal properties. This investigation was designed to evaluate the antidiabetic activity of aqueous extracts of selected culinary-medicinal mushrooms, namely, Pleurotus ostreatus, Calocybe indica, and Volvariella volvacea, using in vitro models (α-amylase inhibition assay, glucose uptake by yeast cells, and glucose adsorption capacity)...
2017: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/28303711/phenolic-elderberry-extracts-anthocyanins-procyanidins-and-metabolites-influence-glucose-and-fatty-acid-uptake-in-human-skeletal-muscle-cells
#4
Giang Thanh Thi Ho, Eili Tranheim Kase, Helle Wangensteen, Hilde Barsett
Uptake of glucose and fatty acids in skeletal muscle is of interest for type 2 diabetes treatment. The aim was to study glucose and fatty acid uptake in skeletal muscle cells, antioxidant effects, and inhibition of carbohydrate-hydrolyzing enzymes by elderberries. Enhanced glucose and oleic acid uptake in human skeletal muscle cells were observed after treatment with phenolic elderberry extracts, anthocyanins, procyanidins, and their metabolites. The 96% EtOH and the acidified MeOH extracts were highly active...
March 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28303158/antidiabetic-effect-of-fresh-nopal-opuntia-ficus-indica-in-low-dose-streptozotocin-induced-diabetic-rats-fed-a-high-fat-diet
#5
Seung Hwan Hwang, Il-Jun Kang, Soon Sung Lim
The objective of the present study was to evaluate α-glucosidase inhibitory and antidiabetic effects of Nopal water extract (NPWE) and Nopal dry power (NADP) in low-dose streptozotocin- (STZ-) induced diabetic rats fed a high-fat diet (HFD). The type 2 diabetic rat model was induced by HFD and low-dose STZ. The rats were divided into four groups as follows: (1) nondiabetic rats fed a regular diet (RD-Control); (2) low-dose STZ-induced diabetic rats fed HFD (HF-STZ-Control); (3) low-dose STZ-induced diabetic rats fed HFD and supplemented with NPWE (100 mg/kg body weight, HF-STZ-NPWE); and (4) low-dose STZ-induced diabetic rats fed HFD and supplemented with comparison medication (rosiglitazone, 10 mg/kg, body weight, HF-STZ-Rosiglitazone)...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28301958/unlocking-the-in-vitro-anti-inflammatory-and-antidiabetic-potential-of-polygonum-maritimum
#6
Maria João Rodrigues, Luísa Custódio, Andreia Lopes, Marta Oliveira, Nuno R Neng, José M F Nogueira, Alice Martins, Amélia P Rauter, João Varela, Luísa Barreira
CONTEXT: Several Polygonum species (Polygonaceae) are used in traditional medicine in Asia, Europe and Africa to treat inflammation and diabetes. OBJECTIVE: Evaluate the in vitro antioxidant, anti-inflammatory and antidiabetic potential of methanol and dichloromethane extracts of leaves and roots of the halophyte Polygonum maritimum L. MATERIAL AND METHODS: Antioxidant activity was determined (up to 1 mg/mL) as radical-scavenging activity (RSA) of 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS), copper (CCA) and iron (ICA) chelating activities and iron reducing power (FRAP)...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28296055/efficacy-and-safety-of-saxagliptin-compared-with-acarbose-in-chinese-patients-with-type-2-diabetes-mellitus-uncontrolled-on-metformin-monotherapy-results-of-a-phase-iv-open-label-randomized-controlled-study-the-smart-study
#7
Jin Du, Li Liang, Hui Fang, Fengmei Xu, Wei Li, Liya Shen, Xueying Wang, Chun Xu, Fang Bian, Yiming Mu
AIM: To investigate the efficacy, safety and tolerability of saxagliptin compared with acarbose in Chinese patients with type 2 diabetes mellitus (T2DM) inadequately controlled with metformin monotherapy. MATERIALS AND METHODS: SMART was a 24-week, multicentre, randomized, parallel-group, open-label Phase IV study conducted at 35 sites in China (24/09/2014-29/09/2015). The primary outcome was change from baseline in HbA1c at Week 24. Secondary efficacy outcomes assessed at Week 24 included the proportion of patients achieving HbA1c<7...
March 14, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28288931/pouteria-torta-epicarp-as-a-useful-source-of-%C3%AE-amylase-inhibitor-in-the-control-of-type-2-diabetes
#8
Paloma Michelle de Sales, Paula Monteiro de Souza, Mariana Dartora, Inês Sabioni Resck, Luiz Alberto Simeoni, Yris Maria Fonseca-Bazzo, Pérola de Oliveira Magalhães, Dâmaris Silveira
Type 2 diabetes plays a major role in public health, affecting about 400 million adults. One of the used strategies to control type 2 diabetes is the inhibition of α-amylase activity to reduce post-prandial blood glucose levels. Therefore, in past decades, the search of new α-amylase inhibitors has led to the evaluation of natural products as a source of these compounds. Pouteria torta (Sapotaceae) is widespread in Brazil and bears edible fruits. Epicarp and pulp crude extracts of fresh fruits were studied for in vitro α-amylase inhibition activity...
March 10, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28271251/efficacy-and-safety-of-metformin-and-sitagliptin-based-triple-antihyperglycemic-therapy-strategy-a-multicenter-randomized-controlled-non-inferiority-clinical-trial
#9
Wen Xu, Yiming Mu, Jiajun Zhao, Dalong Zhu, Qiuhe Ji, Zhiguang Zhou, Bin Yao, Anhua Mao, Samuel S Engel, Bin Zhao, Yan Bi, Longyi Zeng, Xingwu Ran, Juming Lu, Linong Ji, Wenying Yang, Weiping Jia, Jianping Weng
Despite the current guideline's recommendation of a timely stepwise intensification therapy, the "clinical inertia", termed as the delayed treatment intensification, commonly exists in the real world, which may be partly due to the relatively little substantial evidence and no clear consensus regarding the efficacy and safety of triple oral agents in patients inadequately controlled with dual therapy. In this clinical trial performed in 237 centers in China, 5,535 type 2 diabetic patients inadequately controlled by previous therapies were treated with a stable metformin/sitagliptin dual therapy for 20 weeks...
February 7, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28250646/antihyperglycemic-activity-of-the-leaves-from-annona-cherimola-miller-and-rutin-on-alloxan-induced-diabetic-rats
#10
Fernando Calzada, Jesús Iván Solares-Pascasio, R M Ordoñez-Razo, Claudia Velazquez, Elizabeth Barbosa, Normand García-Hernández, David Mendez-Luna, José Correa-Basurto
BACKGROUND: Annona cherimola, known as "chirimoya" has been reported in Mexican traditional medicine for the treatment of diabetes. OBJECTIVE: The aims of the present study were to validate and assess the traditional use of A. cherimola as an antidiabetic agent. MATERIALS AND METHODS: The ethanol extract from A. cherimola (300 mg/kg, EEAc), subsequent fractions (100 mg/kg), and rutin (30 mg/kg) were studied on alloxan-induced type 2 diabetic (AITD) and normoglycemic rats...
January 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28237572/preparation-characterization-and-%C3%AE-glycosidase-inhibition-activity-of-a-carboxymethylated-polysaccharide-from-the-residue-of-sarcandra-glabra-thunb-nakai
#11
Wei Liu, Cheng Hu, Yameng Liu, Shijie Dai, Weisheng Lu, Xing Lv, Wenbing Yao, Xiangdong Gao
A carboxymethylated polysaccharide (CMSERP) was prepared from the residue of Sarcandra glabra (Thunb.) Nakai. CMSERP was mainly composed of galacturonic acid (GalA), glucose (Glc), galactose (Gal), glucuronic acid (GlcA), arabinose (Ara), rhamnose (Rha), xylose (Xyl), ribose (Rib), and fucose (Fuc) at the ratio of 29.79:19.30:11.92:6.32:4.68:3.95:3.39:2.31:1.00. The primary structure features of CMSERP were determined to be a pectin like polysaccharide according to FT-IR, NMR, and HPAEC-PAD. The results of HPSEC-MALLS-RID and DLS indicated the Mw, Mn, Mz, and S2Z1/2 of CMSERP were 5...
February 22, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28219252/a-phlorotannin-constituent-of-ecklonia-cava-alleviates-postprandial-hyperglycemia-in-diabetic-mice
#12
Hyun-Ah Lee, Ji-Hyeok Lee, Ji-Sook Han
CONTEXT: 2,7″-Phloroglucinol-6,6'-bieckol is a type of phlorotannin isolated from brown algae, Ecklonia cava Kjellman (Phaeophyceae; Laminareaceae). 2,7″-Phloroglucinol-6,6'-bieckol mediates antioxidant activities. However, there has been no research on improving postprandial hyperglycaemia using 2,7″-phloroglucinol-6,6'-bieckol. OBJECTIVE: This study investigated the inhibitory effects of 2,7″-phloroglucinol-6,6'-bieckol on activities of α-glucosidase and α-amylase as well as its alleviating effect on postprandial hyperglycaemia in streptozotocin-induced diabetic mice...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28217550/antidiabetic-and-anticancer-activities-of-mangifera-indica-cv-okrong-leaves
#13
Aunyachulee Ganogpichayagrai, Chanida Palanuvej, Nijsiri Ruangrungsi
Diabetes and cancer are a major global public health problem. Plant-derived agents with undesirable side-effects were required. This study aimed to evaluate antidiabetic and anticancer activities of the ethanolic leaf extract of Mangifera indica cv. Okrong and its active phytochemical compound, mangiferin. Antidiabetic activities against yeast α-glucosidase and rat intestinal α-glucosidase were determined using 1 mM of p-nitro phenyl-α-D-glucopyranoside as substrate. Inhibitory activity against porcine pancreatic α-amylase was performed using 1 mM of 2-chloro-4 nitrophenol-α-D-maltotroside-3 as substrate...
January 2017: Journal of Advanced Pharmaceutical Technology & Research
https://www.readbyqxmd.com/read/28216594/anti-hyperglycemic-activity-of-major-compounds-from-calea-ternifolia
#14
Sonia Escandón-Rivera, Araceli Pérez-Vásquez, Andrés Navarrete, Mariana Hernández, Edelmira Linares, Robert Bye, Rachel Mata
Demethylisoencecalin (1) and caleins A (4) and C (5) (3.16-31.6 mg/kg, p.o.), the major components from an infusion of Calea ternifolia controlled postprandial glucose levels during an oral sucrose tolerance test (OSTT, 3 g/kg) in normal and nicotinamide/streptozotocin (NA/STZ, 40/100 mg/kg) hyperglicemic mice. The effects were comparable to those of acarbose (5 mg/kg). During the isolation of 1, 4, and 5, four additional metabolites not previously reported for the plant, were obtained, namely 6-acetyl-5-hydroxy-2-methyl-2-hydroxymethyl-2H-chromene (3), herniarin (6), scoparone (7), and 4',7-dimethylapigenin (8)...
February 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28213385/effectiveness-of-acarbose-in-treating-elderly-patients-with-diabetes-with-postprandial-hypotension
#15
Jie Zhang, Lixin Guo
: Postprandial hypotension (PPH) is a common condition that occurs primarily in elderly patients with type 2 diabetes mellitus (T2DM). This study aimed to assess the effectiveness of acarbose for PPH; it also investigated possible mechanisms behind PPH development. This single-blind, randomized controlled trial included 91 elderly patients with T2DM, aged between 60 and 80 years, who were inpatients at Beijing Hospital between March 2012 and November 2014. The patients were included into one of three groups: Group A, patients with T2DM without PPH; Group B, patients with T2DM with PPH receiving placebo; and Group C, patients with T2DM with PPH receiving acarbose...
February 17, 2017: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/28208607/induction-of-diverse-bioactive-secondary-metabolites-from-the-mangrove-endophytic-fungus-trichoderma-sp-strain-307-by-co-cultivation-with-acinetobacter-johnsonii-strain-b2
#16
Liuhong Zhang, Shah Iram Niaz, Dilfaraz Khan, Zhen Wang, Yonghong Zhu, Haiyun Zhou, Yongcheng Lin, Jing Li, Lan Liu
Two new sesquiterpenes, microsphaeropsisin B (1) and C (2), and two new de-O-methyllasiodiplodins, (3R, 7R)-7-hydroxy-de-O-methyllasiodiplodin (4) and (3R)-5-oxo-de-O-methyllasiodiplodin (5), together with one new natural product (6) and twelve known compounds (3, 7-17), were isolated from the co-cultivation of mangrove endophytic fungus Trichoderma sp. 307 and aquatic pathogenic bacterium Acinetobacter johnsonii B2. Their structures, including absolute configurations, were elucidated by extensive analysis of spectroscopic data, electronic circular dichroism, Mo₂(AcO)₄-induced circular dichroism, and comparison with reported data...
February 10, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28185012/the-synergistic-effect-of-maltose-enhances-the-anti-melanogenic-activity-of-acarbose
#17
Bum-Ho Bin, Sung Tae Kim, Jinhyuk Bhin, Kyounghee Byoun, Tae Ryong Lee, Eun-Gyung Cho
Melanocytes play an important role in maintaining epidermal homeostasis by producing melanin and protecting the skin from harmful environmental factors. However, excessive up- or down-regulation of melanin production often causes hyper- or hypo-pigmented disorders, respectively, which affect the patient's quality of life. Therefore, various strategies for modulating melanin levels have been developed by the pharmaceutical and cosmetic industries. We reported previously that voglibose, which is a well-known anti-hyperglycemic agent, could be used as an anti-melanogenic agent by inhibiting α-glucosidase activity and reducing tyrosinase protein levels...
April 2017: Archives of Dermatological Research
https://www.readbyqxmd.com/read/28181177/outcomes-associated-with-generic-drugs-approved-using-product-specific-determinations-of-therapeutic-equivalence
#18
Joshua J Gagne, Jennifer M Polinski, Wenlei Jiang, Sarah K Dutcher, Jing Xie, Joyce Lii, Lisa A Fulchino, Aaron S Kesselheim
OBJECTIVE: We sought to examine rates of clinical outcomes among patients before and after market introduction of generic versions of five drugs approved using product-specific equivalence determinations. METHODS: We used data from a large national insurer to identify patients who initiated a study (acarbose tablets, salmon calcitonin nasal spray, enoxaparin injection, vancomycin capsules, venlafaxine extended-release tablets) or control drug (nateglinide, glimepiride, alendronate, fondaparinux, metronidazole, sertraline, paroxetine) in each calendar month between 2003 and 2012 and to determine rates of claims-based proxies for lack of effectiveness outcomes following initiation...
February 8, 2017: Drugs
https://www.readbyqxmd.com/read/28176546/inhibition-of-key-enzymes-linked-to-type-2-diabetes-by-compounds-isolated-from-aframomum-melegueta-fruit
#19
COMPARATIVE STUDY
Aminu Mohammed, Victoria Awolola Gbonjubola, Neil Anthony Koorbanally, Md Shahidul Islam
CONTEXT: The use of Aframomum melegueta K. Schum. (Zingiberaceae) fruit for treatment of diabetes has recently been established in Nigeria. However, compounds responsible for the antidiabetic action have not been identified. OBJECTIVE: The present study carried out the bioassay-guided isolation of possible bioactive compounds responsible for the antidiabetic action of A. melegueta fruit. MATERIALS AND METHODS: The A. melegueta fruit was sequentially extracted using ethyl acetate (EtOAc), ethanol and water, and the most active extract (EtOAc) was subjected to column chromatography on a silica gel column using solvent gradient systems of hexane (HEX):EtOAc and EtOAc:MeOH and the isolation of compounds was guided by α-glycosidase and α-amylase inhibitory activities at various concentrations (30-240 μg/mL)...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28170007/lactucaxanthin-a-potential-anti-diabetic-carotenoid-from-lettuce-lactuca-sativa-inhibits-%C3%AE-amylase-and-%C3%AE-glucosidase-activity-in-vitro-and-in-diabetic-rats
#20
Sowmya Shree Gopal, Magisetty Jhansi Lakshmi, Gurunathan Sharavana, Gunaseelan Sathaiah, Yadahally N Sreerama, Vallikannan Baskaran
Intestinal and pancreatic α-amylase and α-glucosidase inhibitors offer an approach to lower the levels of post-prandial hyperglycemia through the control of dietary starch breakdown in digestion. This study hypothesized that lactucaxanthin (Lxn) in lettuce (Lactuca sativa) inhibits the activity of α-amylase and α-glucosidase. In this study, the interaction of Lxn with α-amylase and α-glucosidase in silico and its inhibitory effect on these enzymes were studied using in vitro and STZ-induced diabetic rat models...
February 7, 2017: Food & Function
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