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https://www.readbyqxmd.com/read/28813027/sulfonamide-linked-ciprofloxacin-sulfadiazine-and-amantadine-derivatives-as-a-novel-class-of-inhibitors-of-jack-bean-urease-synthesis-kinetic-mechanism-and-molecular-docking
#1
Pervaiz Ali Channar, Aamer Saeed, Fernando Albericio, Fayaz Ali Larik, Qamar Abbas, Mubashir Hassan, Hussain Raza, Sung-Yum Seo
Sulfonamide derivatives serve as an important building blocks in the drug design discovery and development (4D) process. Ciprofloxacin-, sulfadiazine- and amantadine-based sulfonamides were synthesized as potent inhibitors of jack bean urease and free radical scavengers. Molecular diversity was explored and electronic factors were also examined. All 24 synthesized compounds exhibited excellent potential against urease enzyme. Compound 3e (IC50 = 0.081 ± 0.003 µM), 6a (IC50 = 0.0022 ± 0.0002 µM), 9e (IC50 = 0...
August 16, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28812260/zinc-metabolism-and-metallothioneins
#2
REVIEW
Abdulkerim Kasim Baltaci, Kemal Yuce, Rasim Mogulkoc
Among the trace elements, zinc is one of the most used elements in biological systems. Zinc is found in the structure of more than 2700 enzymes, including hydrolases, transferases, oxyreductases, ligases, isomerases, and lyases. Not surprisingly, it is present in almost all body cells. Preserving the stability and integrity of biological membranes and ion channels, zinc is also an intracellular regulator and provides structural support to proteins during molecular interactions. It acts as a structural element in nucleic acids or other gene-regulating proteins...
August 15, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28811706/therapeutic-potential-of-flavonoids-in-inflammatory-bowel-disease-a-comprehensive-review
#3
REVIEW
Ali Salaritabar, Behrad Darvishi, Farzaneh Hadjiakhoondi, Azadeh Manayi, Antoni Sureda, Seyed Fazel Nabavi, Leo R Fitzpatrick, Seyed Mohammad Nabavi, Anupam Bishayee
The inflammatory process plays a central role in the development and progression of numerous pathological situations, such as inflammatory bowel disease (IBD), autoimmune and neurodegenerative diseases, metabolic syndrome, and cardiovascular disorders. IBDs involve inflammation of the gastrointestinal area and mainly comprise Crohn's disease (CD) and ulcerative colitis (UC). Both pathological situations usually involve recurring or bloody diarrhea, pain, fatigue and weight loss. There is at present no pharmacological cure for CD or UC...
July 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28811692/experimental-validation-of-antidiabetic-and-antioxidant-potential-of-cassia-tora-l-an-indigenous-medicinal-plant
#4
Vishnu Kumar, Ranjana Singh, Farzana Mahdi, Abbas Ali Mahdi, Raj Kumar Singh
The present study was undertaken to evaluate antidiabetic and antioxidant activities of Cassia tora (C. tora) seeds extract against streptozotocin induced diabetes in experimental rats to scientifically validate its use against diabetes. Ethanolic extract of C. tora seeds extract and standard drug (glibenclamide) prepared in aqueous gum acacia (2 %, w/v) suspension and fed orally to streptozotocin induced male adult diabetic rats of Charles Foster strain for 15 days. Biochemical parameters in normal, diabetic control, standard (600 μg/kg bw p...
July 2017: Indian Journal of Clinical Biochemistry: IJCB
https://www.readbyqxmd.com/read/28810763/the-collision-free-photochemistry-of-methyl-azide-at-157-nm-mechanism-and-energy-release
#5
Alfredo Quinto-Hernandez, Shih-Huang Lee, Alec M Wodtke
Synchrotron radiation VUV-photoionization based photofragment translational spectroscopy was used to identify the primary and secondary photodissociation reactions of methyl azide (CH3N3) at 157 nm under collision-free conditions. Two primary dissociation channels are identified, leading to CH3 + N3 (the radical channel) and CH3N + N2 (the molecular elimination channel). The last channel is the major dissociation pathway, but unlike work at longer photolysis wavelengths, here, the radical channel exclusively produces the higher energy isomer cyclic-N3...
August 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28809441/design-and-fabrication-of-temperature-sensitive-nanogels-with-controlled-drug-release-properties-for-enhanced-photothermal-sterilization
#6
Luoyuan Li, Limin Fu, Jing Zhou, Xicheng Ai, Jianping Zhang
Excessive free radicals can cause normal protein metamorphic, and further damage healthy cells, while the damaged cells are more prone to infection with pathogenic bacteria. For better removing excessive free radicals and deleterious bacteria from human body, it is urgently needed to develop synergistic antioxidant and antibacterial agents. Herein, we designed novel temperature-sensitive, curcumin (Cur)-loaded nanogels to scavenge reactive oxygen species and kill pathogenic bacteria. Photothermal sterilization, different from traditional antibiotics, is a promising and effective treatment for inactivation of pathogenic bacteria...
August 15, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28809077/donor-acceptor-complex-enables-alkoxyl-radical-generation-for-metal-free-c-sp3-c-sp3-cleavage-and-allylation-alkenylation
#7
Jing Zhang, Yang Li, Ruoyu Xu, Yiyun Chen
The alkoxyl radical is an essential and prevalent reactive intermediate for chemical and biological studies. Here we report the first donor-acceptor complex-enabled alkoxyl radical generation under metal-free reaction conditions induced by visible light. Hantzsch ester forms the key donor-acceptor complex with N-alkoxyl derivatives, which is elucidated by a series of spectrometry and mechanistic experiments. Selective C(sp3)-C(sp3) bond cleavage and allylation/alkenylation is demonstrated for the first time using this photocatalyst-free approach with linear primary, secondary, and tertiary alkoxyl radicals...
August 15, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28808758/radical-nephrectomy-for-primary-retroperitoneal-liposarcoma-near-the-kidney-has-a-beneficial-effect-on-disease-free-survival
#8
Jinsoo Rhu, Chan Woo Cho, Kyo Won Lee, Hyojun Park, Jae Berm Park, Yoon-La Choi, Sung Joo Kim
BACKGROUND: The purpose of this study is to analyze the clinical impact of radical nephrectomy on retroperitoneal liposarcoma near the kidney. METHODS: Data of patients who underwent surgery for unilateral primary retroperitoneal liposarcoma near the kidney were retrospectively collected. Patients were divided into four groups according to whether they underwent nephrectomy and combined resection of other organs. Kaplan-Meier survival analysis was used to estimate disease-free survival and overall survival...
August 14, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28808499/epigenetics-and-oxidative-stress-in-aging
#9
REVIEW
Amy Guillaumet-Adkins, Yania Yañez, Manuel D Peris-Diaz, Ines Calabria, Cora Palanca-Ballester, Juan Sandoval
Aging is a multifactorial process characterized by the progressive loss of physiological functions, leading to an increased vulnerability to age-associated diseases and finally to death. Several theories have been proposed to explain the nature of aging. One of the most known identifies the free radicals produced by the mitochondrial metabolism as the cause of cellular and DNA damage. However, there are also several evidences supporting that epigenetic modifications, such as DNA methylation, noncoding RNAs, and histone modifications, play a critical role in the molecular mechanism of aging...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28808408/anti-lipid-potential-of-drimys-brasiliensis
#10
Josueli Merotto, Larissa Vivan Cestonaro, Luciana Grazziotin Rossato-Grando, Luciano de Oliveira Siqueira, Charise Dallazem Bertol
BACKGROUND: The traditional use of Drimys brasiliensis Miers (Winteraceae) in the south of Brazil to reduce cholesterol has not been described in scientific literature. OBJECTIVE: To verify the hypocholesterolemic effects of D. brasiliensis using rats as animal model. MATERIALS AND METHODS: The bark of D. brasiliensis was extracted with water with further lyophilization and was subjected to phytochemical analysis by high-performance liquid chromatography (HPLC), and free radical scavenging activities by 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay to determine antioxidant potential...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28808404/in-vitro-antioxidant-and-antiproliferative-activities-of-various-solvent-fractions-from-clerodendrum-viscosum-leaves
#11
Anil Khushalrao Shendge, Tapasree Basu, Dipankar Chaudhuri, Sourav Panja, Nripendranath Mandal
BACKGROUND: Free radicals such as reactive oxygen and nitrogen species, generated in the body, play an important role in the fulfillment of various physiological functions but their imbalance in the body lead to cellular injury and various clinical disorders such as cancer, neurodegenaration, and inflammation. OBJECTIVE: The objective of this study is to fight this problem, natural antioxidant from plants can be considered as possible protective agents against various diseases such as cancer which might also modify the redox microenvironment to reduce the genetic instability...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28808393/evaluation-of-the-antidiabetic-properties-of-s-1708-mulberry-variety
#12
Brijesh Ranjan, Randhir Kumar, Neeraj Verma, Swati Mittal, Pranab Lal Pakrasi, R Venkatesh Kumar
BACKGROUND: Diabetes is a metabolic disease prevalent worldwide in all age group of people. The source of diabetes is due to an oxidation process that can produce free radicals. An increase in oxidative free radicals in the body is reported to be one of the several causes of diabetes. The best remedy to combat oxidative stress is the use of antioxidants, which inhibit and scavenge free radicals. AIM: This study has been undertaken to evaluate the antioxidant activity and antidiabetic effect of mulberry leaf extract in diabetic mice...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28808388/caesalpinia-crista-linn-induces-protection-against-dna-and-membrane-damage
#13
R Sunil Kumar, Ramesh Balenahalli Narasingappa, Chandrashekhar G Joshi, Talakatta K Girish, Ananda Danagoudar
BACKGROUND: Caesalpinia crista is a medicinal herb used to cure various ailments in subtropical and tropical regions of Southeast Asia. OBJECTIVE: The objective of this evaluation of C. crista against free radical induced DNA and erythrocyte damage. MATERIALS AND METHODS: The profiles of polyphenol and flavonoid were quantified through reversed-phase high-performance liquid chromatography. Free radical induced DNA and membrane damage were performed using H2O2 as oxidative agent...
July 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/28808373/is-edaravone-the-future-of-free-radical-scavenging-in-inflammatory-states
#14
Abhijit S Nair
No abstract text is available yet for this article.
July 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28808277/age-and-sex-dependency-of-the-association-between-systemic-antioxidant-potential-and-glaucomatous-damage
#15
Yoshimi Asano, Noriko Himori, Hiroshi Kunikata, Mai Yamazaki, Yukihiro Shiga, Kazuko Omodaka, Hidetoshi Takahashi, Toru Nakazawa
Systemic oxidative stress is thought to be an important factor in the pathogenesis of glaucoma. In particular, low systemic antioxidative capacity, which normally counters oxidative stress, may contribute to glaucoma. Thus, we investigated the association between biological antioxidant potential (BAP), a biomarker of systemic antioxidative capacity, and glaucoma severity in patients with open-angle glaucoma (OAG). This study included 480 eyes of 240 patients with OAG and 66 healthy control eyes. We measured the BAP serum level with a free radical analyzer and compared it with a weighted estimate of the number of retinal ganglion cells (wrgc), derived from circumpapillary retinal nerve fiber layer thickness and visual field mean deviation...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28808196/antioxidant-mediated-response-of-scoparia-dulcis-in-noise-induced-redox-imbalance-and-immunohistochemical-changes-in-rat-brain
#16
Wankupar Wankhar, Sakthivel Srinivasan, Ravindran Rajan, Rathinasamy Sheeladevi
Noise has been regarded as an environmental/occupational stressor that causes damages to both auditory and non-auditory organs. Prolonged exposure to these mediators of stress has often resulted in detrimental effect, where oxidative/nitrosative stress plays a major role. Hence, it would be appropriate to examine the possible role of free radicals in brain discrete regions and the "antioxidants" mediated response of S. dulcis. Animals were subjected to noise stress for 15 days (100 dB/4 hours/day) and estimation of endogenous free radical and antioxidant activity were carried out on brain discrete regions (the cerebral cortex, cerebellum, brainstem, striatum, hippocampus and hypothalamus)...
January 19, 2017: Journal of Biomedical Research
https://www.readbyqxmd.com/read/28806962/oncofertility-in-patients-with-stage-i-epithelial-ovarian-cancer-fertility-sparing-surgery-in-young-women-of-reproductive-age
#17
Xuan Jiang, Jiaxin Yang, Mei Yu, Weimin Xie, Dongyan Cao, Ming Wu, Lingya Pan, Huifang Huang, Yan You, Keng Shen
BACKGROUND: Fertility-sparing surgery is indicated for patients with stage I epithelial ovarian cancers. We sought to evaluate the clinical outcomes and oncofertility in a cohort of patients of reproductive age with stage I epithelial ovarian cancer (EOC). METHODS: Overall, 108 patients of reproductive age (≤ 40 years) diagnosed with stage I EOC who were treated at Peking Union Medical College Hospital between 1999 and 2013 were included in the study. The Kaplan-Meier model and Cox regression analyses were used for the survival analysis...
August 15, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28806069/oxidation-kinetics-of-bromophenols-by-nonradical-activation-of-peroxydisulfate-in-the-presence-of-carbon-nanotube-and-formation-of-brominated-polymeric-products
#18
Chao-Ting Guan, Jin Jiang, Cong-Wei Luo, Jun Ma, Su-Yan Pang, Yang Zhou, Yi Yang
This work demonstrated that bromophenols (BrPs) could be readily oxidized by peroxydisulfate (PDS) activated by a commercial carbon nanotube (CNT), while furfuryl alcohol (a chemical probe for singlet oxygen (1O2)) was quite refractory. Results obtained by radical quenching experiments, electron paramagnetic resonance spectroscopy, and Fourier transform infrared spectroscopy further confirmed the involvement of nonradical PDS-CNT complexes rather than 1O2. Bicarbonate and chloride ion exhibited negligible impacts on BrPs degradation by the PDS/CNT system, while a significant inhibitory effect was observed for natural organic matter...
August 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28806066/thiol-mediated-synthesis-of-hyaluronic-acid-epigallocatechin-3-o-gallate-conjugates-for-the-formation-of-injectable-hydrogels-with-free-radical-scavenging-property-and-degradation-resistance
#19
Chixuan Liu, Ki Hyun Bae, Atsushi Yamashita, Joo Eun Chung, Motoichi Kurisawa
Hyaluronic acid (HA)-based biomaterials have demonstrated only limited in vivo stability as a result of rapid degradation by hyaluronidase and reactive oxidative species. The green tea catechin, (-)-epigallocatechin-3-O-gallate (EGCG), has received considerable attention because of its powerful antioxidant and enzyme-inhibitory activities. We describe here the synthesis of HA-EGCG conjugate using a thiol-mediated reaction and its use for the preparation of a long-lasting injectable hydrogel. HA-EGCG conjugates with tunable degrees of substitution were synthesized by the nucleophilic addition reaction between EGCG quinone and thiolated HA under mild conditions...
August 14, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28805673/alk-status-assessment-with-liquid-biopsies-of-lung-cancer-patients
#20
REVIEW
Paul Hofman
Patients with advanced stage non-small cell lung carcinoma (NSCLC) harboring an anaplastic lymphoma kinase ALK gene rearrangement, detected from a tissue sample, can benefit from targeted ALK inhibitor treatment. However, while treatment is initially effective in most cases, relapse or progression occurs due to different resistance mechanisms including mutations in the tyrosine kinase domain of echinoderm microtubule-associated protein-like 4 (EML44)-ALK. The liquid biopsy concept has recently radically changed the clinical care of NSCLC patients, in particular for those harboring an epidermal growth factor receptor (EGFR) gene mutation...
August 12, 2017: Cancers
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