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https://www.readbyqxmd.com/read/28938606/oroxylin-a-inhibits-colitis-by-inactivating-nlrp3-inflammasome
#1
Wei Zhou, Xiuting Liu, Xin Zhang, Jingjing Tang, Zhiyu Li, Qing Wang, Rong Hu
NLRP3 inflammasome is a novel therapeutic target for inflammatory bowel disease (IBD). The aim of this study was to investigate the anti-inflammatory effect of a bioactive flavonoid-oroxylin A on the treatment of dextran sulfate sodium (DSS)-induced murine colitis via targeting NLRP3 inflammasome. In this study, we found that oroxylin A attenuated experimental colitis in mice, including loss of body weights, shortening of the colon lengths and infiltration of inflammatory cells. The production of IL-1β, IL-6 and TNF-α in colon was also markedly reduced by oroxylin A...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938552/novel-pleiotropic-effects-of-bioactive-phospholipids-in-human-lung-cancer-metastasis
#2
Gabriela Schneider, Zachariah Payne Sellers, Kamila Bujko, Sham S Kakar, Magda Kucia, Mariusz Z Ratajczak
We previously proposed that one of the unwanted side effects of chemotherapy and radiotherapy is the increase in several peptide- and non-peptide based chemoattractants in damaged tissues, leading to induction of a prometastatic microenvironment for remaining cancer cells. Herein, we turned out our attention to a potential role of bioactive phospholipids (BphsLs), such as sphingosine-1-phosphate (S1P), ceramide-1-phosphate (C1P), lysophosphatidylcholine (LPC), and lysophosphatidic acid (LPA) in lung cancer (LC) metastasis...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938517/green-tea-camellia-sinensis-and-l-theanine-medicinal-values-and-beneficial-applications-in-humans-a-comprehensive-review
#3
REVIEW
Muhammad Saeed, Muhammad Naveed, Muhammad Arif, Mohib Ullah Kakar, Robina Manzoor, Mohamed Ezzat Abd El-Hack, Mahmoud Alagawany, Ruchi Tiwari, Rekha Khandia, Ashok Munjal, Kumaragurubaran Karthik, Kuldeep Dhama, Hafiz M N Iqbal, Maryam Dadar, Chao Sun
Green tea (Camellia sinensis) is a famous herb, and its extract has been extensively used in traditional Chinese medicinal system. In this context, several studies have revealed its health benefits and medicinal potentialities for several ailments. With ever increasing scientific knowledge, search for safer, potential and novel type of health-related supplements quest, scientists are re-directing their research interests to explore natural resources i.e. medicinal herbs/plant derived compounds. Green tea consumption has gained a special attention and popularity in the modern era of changing lifestyle...
September 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28938465/serum-insulin-bioassay-reflects-insulin-sensitivity-and-requirements-in-type-1-diabetes
#4
Joseph A M J L Janssen, Gemma Llauradó, Aimee J Varewijck, Per-Henrik Groop, Carol Forsblom, Sonia Fernández-Veledo, Elisabeth S R van den Dungen, Joan Vendrell, Leo J Hofland, Hannele Yki-Järvinen
Background: Insulin resistance could increase insulin requirements in type 1 diabetes (TD1). Current insulin immunoassays do not detect insulin analogues. Kinase Insulin Receptor Activation (KIRA) bioassays specific for human insulin receptor isoforms A and B (IR-A and IR-B) permit assessment of all circulating insulin bioactivity. We studied whether IR-A and IR-B KIRA assays are related to direct measures of insulin sensitivity or insulin doses in TD1. Methods: We evaluated 31 adult patients with TD1 (age 45...
August 14, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28938434/fgf21-is-an-insulin-dependent-postprandial-hormone-in-adult-humans
#5
Ricardo J Samms, Jo E Lewis, Luke Norton, Francis B Stephens, Christopher J Gaffney, Tony Butterfield, Dennis Smith, Christine Cheng, James W Perfield, Andrew C Adams, Francis J P Ebling, Kostas Tsintzas
Context: Fibroblast growth factor 21 (FGF21) secretion has been shown to respond directly to carbohydrate consumption, with glucose, fructose and sucrose all reported to increase plasma levels of FGF21 in rodents and humans. However, carbohydrate consumption also results in secretion of insulin. Objective: The aim of this study was to examine the combined and independent effects of hyperglycemia and hyperinsulinemia on total and bioactive FGF21 in the postprandial period in humans, and determine whether this effect is attenuated in conditions of altered insulin secretion and action...
August 4, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28937968/diverse-bioactive-compounds-from-sarcophtyton-glaucom-structure-elucidation-and-cytotoxic-activity-studies
#6
Mohamed Shaaban, Ali M El-Hagrassi, Mohamed A Abdelghani, Abeer F Osman
Chemical investigation of the Red Sea soft coral Sarcophyton glaucom collected at the coasts of Hurghada, Egypt, led to the isolation of one new naturally occurring 4-oxo-1,1'-pentanoic acid anhydride (1), along with four diterpenes; sarcophinone (2a), 8-epi-sarcophinone (2b), (+)-7α,8β-dihydroxydeepoxysarcophine (3), sinumaximol G (4), (+)-sarcophine (5), sesquiterpene; prostantherol (6), sterol; 3β,24S-ergost-5-en-ol (7) and hexadecanoic acid. The structures of the obtained compounds were established using diverse spectroscopic techniques including 1D and 2D NMR and HRMS...
September 22, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28937683/a-vitronectin-derived-peptide-reverses-ovariectomy-induced-bone-loss-via-regulation-of-osteoblast-and-osteoclast-differentiation
#7
Seung-Ki Min, Hyun Ki Kang, Sung Youn Jung, Da Hyun Jang, Byung-Moo Min
Osteoporosis affects millions of people worldwide by promoting bone resorption and impairing bone formation. Bisphosphonates, commonly used agents to treat osteoporosis, cannot reverse the substantial bone loss that has already occurred by the time of diagnosis. Moreover, their undesirable side-effects, including osteonecrosis of the jaw, have been reported. Here, we demonstrated that a new bioactive core vitronectin-derived peptide (VnP-16) promoted bone formation by accelerating osteoblast differentiation and activity through direct interaction with β1 integrin followed by FAK activation...
September 22, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28937646/effects-of-liposomes-contained-in-thermosensitive-hydrogels-as-biomaterials-useful-in-neural-tissue-engineering
#8
Yusser Olguín, Cristian Campos, Javiera Catalán, Luís Velásquez, Fernando Osorio, Iván Montenegro, Alejandro Madrid, Cristian Acevedo
Advances in the generation of suitable thermosensitive hydrogels for the delivery of cells in neural tissue engineering demonstrate a delicate relationship between physical properties and capabilities to promote cell proliferation and differentiation. To improve the properties of these materials, it is possible to add liposomes for the controlled release of bioactive elements, which in turn can affect the physical and biological properties of the hydrogels. In the present investigation, different hydrogels based on Pluronic F127 have been formulated with the incorporation of chitosan and two types of liposomes of two different sizes...
September 22, 2017: Materials
https://www.readbyqxmd.com/read/28937627/polyyne-enriched-extract-from-oplopanax-elatus-significantly-ameliorates-the-progression-of-colon-carcinogenesis-in-apc-min-mice
#9
Xin Qiao, Wei Sun, Chongzhi Wang, Li Zhang, Ping Li, Xiaodong Wen, Jie Yang, Chunsu Yuan
Colorectal cancer (CRC) is the third most common cancer in the world. Oplopanax elatus is widely used in traditional medicine. However, little is known about its pharmacological effects and bioactive compounds. We evaluated the effects of the polyyne-enriched extract from O. elatus (PEO) on the progression of colon carcinogenesis in Apc(Min/+) mice. In addition, these effects were also investigated in HCT116 and SW480 cells. After PEO oral administration (0.2% diet) for 12 weeks, PEO significantly improved body weight changes and reduced the tumor burden and tumor multiplicity compared with the untreated mice...
September 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28937605/production-of-poly-%C3%AE%C2%B5-caprolactone-hydroxyapatite-composite-scaffolds-with-a-tailored-macro-micro-porous-structure-high-mechanical-properties-and-excellent-bioactivity
#10
Jong-Woo Kim, Kwan-Ha Shin, Young-Hag Koh, Min Jin Hah, Jiyoung Moon, Hyoun-Ee Kim
We produced poro-us poly(ε-caprolactone) (PCL)/hydroxyapatite (HA) composite scaffolds for bone regeneration, which can have a tailored macro/micro-porous structure with high mechanical properties and excellent in vitro bioactivity using non-solvent-induced phase separation (NIPS)-based 3D plotting. This innovative 3D plotting technique can create highly microporous PCL/HA composite filaments by inducing unique phase separation in PCL/HA solutions through the non-solvent-solvent exchange phenomenon. The PCL/HA composite scaffolds produced with various HA contents (0 wt %, 10 wt %, 15 wt %, and 20 wt %) showed that PCL/HA composite struts with highly microporous structures were well constructed in a controlled periodic pattern...
September 22, 2017: Materials
https://www.readbyqxmd.com/read/28937599/mediterranean-diet-and-multi-ingredient-based-interventions-for-the-management-of-non-alcoholic-fatty-liver-disease
#11
REVIEW
Manuel Suárez, Noemí Boqué, Josep M Del Bas, Jordi Mayneris-Perxachs, Lluís Arola, Antoni Caimari
Non-alcoholic fatty liver disease (NAFLD) comprises a wide spectrum of hepatic disorders, from simple steatosis to hepatic necro-inflammation leading to non-alcoholic steatohepatitis (NASH). Although the prevalence of these multifactorial pathologies is continuously increasing in the population, there is still not an established methodology for their treatment other than weight loss and a change in lifestyle habits, such as a hypocaloric diet and physical exercise. In this framework, there is increasing evidence that several food bioactives and dietary patterns are effective for reversing and preventing the onset of these pathologies...
September 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28937585/phytochemicals-extraction-isolation-and-identification-of-bioactive-compounds-from-plant-extracts
#12
REVIEW
Ammar Altemimi, Naoufal Lakhssassi, Azam Baharlouei, Dennis G Watson, David A Lightfoot
There are concerns about using synthetic phenolic antioxidants such as butylated hydroxytoluene (BHT) and butylated hydroxyanisole (BHA) as food additives because of the reported negative effects on human health. Thus, a replacement of these synthetics by antioxidant extractions from various foods has been proposed. More than 8000 different phenolic compounds have been characterized; fruits and vegetables are the prime sources of natural antioxidants. In order to extract, measure, and identify bioactive compounds from a wide variety of fruits and vegetables, researchers use multiple techniques and methods...
September 22, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28937232/physiology-of-nitric-oxide-in-the-respiratory-system
#13
M Antosova, D Mokra, L Pepucha, J Plevkova, T Buday, M Sterusky, A Bencova
Nitric oxide (NO) is an important endogenous neurotransmitter and mediator. It participates in regulation of physiological processes in different organ systems including airways. Therefore, it is important to clarify its role in the regulation of both airway and vascular smooth muscle, neurotransmission and neurotoxicity, mucus transport, lung development and in the. surfactant production. The bioactivity of NO is highly variable and depends on many factors: the presence and activity of NO-producing enzymes, activity of competitive enzymes (e...
September 22, 2017: Physiological Research
https://www.readbyqxmd.com/read/28937158/bioactivity-guided-isolation-of-neuritogenic-triterpenoids-from-the-leaves-of-ilex-latifolia-thunb
#14
Xueli Cao, Yu Liu, Jing Li, Lan Xiang, Hiroyuki Osada, Jianhua Qi
Ilex latifolia Thunb is a traditional Chinese tea and herbal medicine. In this study, one new triterpene saponin (1) and six known triterpenoids (2-7) were isolated from the methanol extract of I. latifolia using a PC12 cell bioassay system. The structures and stereochemistry of these compounds were elucidated using spectroscopic methods and chemical derivatization. This new triterpene saponin (1) was characterized as an ursolic type acid with a 19α-hydroxyl and a trisaccharide moiety at C-3. Compound 1 significantly promoted the neurite outgrowth in PC12 cells by 52% at 10 μM, whereas compounds 2-7 showed less neuritogenic activity...
September 22, 2017: Food & Function
https://www.readbyqxmd.com/read/28936877/botryococcus-as-an-alternative-source-of-carotenoids-and-its-possible-applications-an-overview
#15
Ranga Rao Ambati, Deepika Gogisetty, Ravishankar Aswathnarayana Gokare, Sarada Ravi, Panduranga Narasimharao Bikkina, Yuepeng Su, Bo Lei
The enhanced interest in carotenoid research arises partly because of their application in the food and health industries and partly because of the necessity to find a commercially viable natural source for their mass production. The bottlenecks in finding a natural source of carotenoids which can compete with the synthetic products is the mass production of the organism that produces carotenoids, cell harvesting and extraction methods of carotenoids. The microalga Botryococcus braunii is an interesting organism for its commercial value as a rich source of carotenoids...
September 22, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/28936788/isorhamnetin-derivatives-and-piscidic-acid-for-hypercholesterolemia-cholesterol-permeability-hmg-coa-reductase-inhibition-and-docking-studies
#16
Asma Ressaissi, Nebil Attia, Pedro Luis Falé, Rita Pacheco, Bruno L Victor, Miguel Machuqueiro, Maria Luísa M Serralheiro
Bioactive compounds, such as isorhamnetin and piscidic acid, were obtained from decoctions of cladodes (stem pads from Opuntia ficus-indica). The effect of these phenolic compounds, in a fiber-free extract, were evaluated as inhibitors of cholesterol permeation through a Caco-2 cell monolayer and as 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor. A reduction of 38% in cholesterol permeation through the Caco-2 cell monolayer was obtained, and the phenolic compounds all permeated between 6 and 9%. A mixture of these compounds showed an IC50 of 20...
September 21, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28936736/pathological-effects-of-exosomes-in-mediating-diabetic-cardiomyopathy
#17
Esam S B Salem, Guo-Chang Fan
Diabetic subjects are at risk of developing cardiovascular disease, which accounts for 60-80% of diabetes-related mortality. Atherosclerosis is still considered as a leading cause of heart failure in diabetic patients, but it could also be an intrinsic and long-term effect of contractile cardiac cells malfunction, known as diabetic cardiomyopathy (DCM). Pathologically, this cardiac dysfunction is manifested by inflammation, apoptosis, fibrosis, hypertrophy and altered cardiomyocytes metabolism. However, the underlying molecular mechanisms of DCM pathophysiology are not clearly understood...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28936710/cloning-expression-purification-and-bioactivity-evaluation-of-a-thrombin-like-enzyme-from-deinagkistrodon-acutus-venom-gland-library
#18
An Li, Chuan Zhang, Jie Wang, Junjie Wang, Hailong Jiang, Jianzhong Li, Xingyuan Ma, Wen Zhang, Yiming Lu
OBJECTIVES: To identify a new member of serine proteases from Deinagkistrodon acutus via phage display technique and appraise its biocatalytic activities. RESULTS: A novel thrombin-like enzyme gene was cloned by screening the phage display library of D. acutus venom gland. The gene has a 783 bp ORF encoding 260 amino acids. A recombinant enzyme expression vector was constructed and the fused protein was expressed in Escherichia coli. The protein was purified showing a single band of approx...
September 21, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28936642/bioactive-constituents-from-the-whole-plants-of-leontopodium-leontopodioides-wild-beauv
#19
Qiu Chen, Jian Li, Jingya Ruan, Lu Qu, Hongyan Wei, Xiaoling Ma, Yi Zhang, Tao Wang
Five new compounds, leontoaerialosides A (1), B (2), C (3), D (4), and E (5) were obtained from the 70% EtOH extract of the whole plants of Leontopodium leontopodioides (Wild.) Beauv. Their structures were elucidated by chemical and spectroscopic methods. Moreover, compounds 4 and 5 showed significant effects on stimulating the hepatic glucose uptake in HepG2 cells.
September 21, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28936334/synthesis-of-bioactive-and-stabilized-cyclic-peptides-by-macrocyclization-using-c-sp-3-h-activation
#20
Jian Tang, Yadong He, Hongfei Chen, Wangjian Sheng, Huan Wang
Cyclic peptides have attracted increasing attention in recent years due to their ability to inhibit protein-protein interactions. Current strategies to prepare cyclic peptides often rely on functional amino acid side chains or the incorporation of unnatural amino acids, thus limiting their structural diversity. Here, we describe the development of a highly versatile peptide macrocyclization strategy through a palladium-catalyzed C(sp(3))-H activation and the synthesis of cyclic peptides featuring unique hydrocarbon linkages between the β-carbon of amino acids and the aromatic side chains of Phe and Trp...
June 1, 2017: Chemical Science
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