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https://www.readbyqxmd.com/read/28722604/classification-and-visualization-of-physical-and-chemical-properties-of-falsified-medicines-with-handheld-raman-spectroscopy-and-x-ray-computed-tomography
#1
Tomoko Kakio, Naoko Yoshida, Susan Macha, Kazunobu Moriguchi, Takashi Hiroshima, Yukihiro Ikeda, Hirohito Tsuboi, Kazuko Kimura
Analytical methods for the detection of substandard and falsified medical products (SFs) are important for public health and patient safety. Research to understand how the physical and chemical properties of SFs can be most effectively applied to distinguish the SFs from authentic products has not yet been investigated enough. Here, we investigated the usefulness of two analytical methods, handheld Raman spectroscopy (handheld Raman) and X-ray computed tomography (X-ray CT), for detecting SFs among oral solid antihypertensive pharmaceutical products containing candesartan cilexetil as an active pharmaceutical ingredient (API)...
June 19, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28722469/recent-advances-in-gossypol-derivatives-and-analogs-a-chemistry-and-biology-view
#2
Yuzhi Lu, Jun Li, Chun-E Dong, Jian Huang, Hai-Bing Zhou, Wei Wang
Gossypol as a natural occurring polyphenol has been studied in a wide range of therapeutic contexts for a long time. The chemical modifications on gossypol were limited due to the unique chemical properties of polyphenols. The design and synthesis of gossypol derivatives and the exploration of their biological activities are the interest of the synthetic chemists, medicinal chemists and pharmacologists. Thus, the progress of diverse gossypol derivatives and analogs' synthesis, biological activities, mechanism elucidation and drug discovery based on gossypol scaffold is summarized...
July 19, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/28722154/application-of-headspace-solid-phase-microextraction-followed-by-gas-chromatography-coupled-with-mass-spectrometry-spme-gc-ms-to-determine-esters-of-carboxylic-acids-and-other-volatile-compounds-in-d-maculatus-and-d-ater-lipids
#3
Magdalena Cerkowniak, Mieczysława I Boguś, Emilia Włóka, Piotr Stepnowski, Marek Gołębiowski
A constant problem in veterinary medicine, human healthcare, agriculture, forestry or horticulture is the large number of pests, and the lack of effective methods to combat them which cause no harm to the rest of the environment. It is recommended and desired to reduce the use of chemicals and increase the use of agents based on the knowledge acquired in the field of biology, chemistry, and agrochemicals. To learn the defense mechanisms of insects we should consider not only the site of their physiological ability to protect against external factors (cuticle), but also check the possibility of chemical protection, formed by all compounds on the surface and in the body of insects...
July 19, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28721949/rising-to-the-challenge-applying-biofabrication-approaches-for-better-drug-and-chemical-product-development
#4
Anthony M Holmes, Alex Charlton, Brian Derby, Lorna Ewart, Andrew Scott, Wenmiao Shu
Many industrial sectors, from pharmaceuticals to consumer products, are required to provide data on their products to demonstrate their efficacy and that they are safe for patients, consumers and the environment. This period of testing typically requires the use of animal models, the validity of which has been called into question due to the high rates of attrition across many industries. There is increasing recognition of the limitations of animal models and demands for safety and efficacy testing paradigms which embrace the latest technological advances and knowledge of human biology...
July 19, 2017: Biofabrication
https://www.readbyqxmd.com/read/28720944/evaluation-of-the-chemical-composition-antioxidant-and-anti-inflammatory-activities-of-distillate-and-residue-fractions-of-sweet-basil-essential-oil
#5
Hailong Li, Yanhui Ge, Zhimin Luo, Yulan Zhou, Xuguang Zhang, Junqing Zhang, Qiang Fu
In this study, the chemical composition and antioxidant and anti-inflammatory activities of sweet basil (Ocimum basilicum L. Lamiaceae family) were evaluated. Sweet basil is a food-related plant that is widely used in traditional Chinese medicine. Sweet basil crude oil was processed via molecular distillation and further characterized using gas chromatography-mass spectrometry (GC-MS) to screen for new compounds. The GC-MS analysis identified thirty-eight compounds. The major constituents of the residue fraction were estragole (17...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720941/chemical-composition-and-bioactivity-of-essential-oils-from-flower-and-fruit-of-thymbra-capitata-and-thymus-species
#6
Jonathan Delgado-Adámez, María Garrido, Maria Elena Bote, María C Fuentes-Pérez, Javier Espino, Daniel Martín-Vertedor
Thymbra capitata and Thymus species are commonly known as thyme in Spain and they are currently used as culinary herbs, as well as for ornamental, aromatizing and traditional medicinal purposes. Given the economic importance of thyme oils, many thyme species have been studied, and their essential oils (EOs) and other volatile-containing extracts have been chemically characterized. The aim of this study was to evaluate the antioxidant, antimicrobial and cytotoxic activities as well as the phytochemical composition of the EOs from fruits and flowers of T...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28720284/modeling-of-plasmas-for-biomedicine
#7
REVIEW
Natalia Yu Babaeva, George V Naidis
Studies in plasma medicine, which are currently actively expanding, are of multidisciplinary character, involving physical, chemical and biological processes. Rapid progress has been achieved in this field due to synergy between experimental and theoretical/computational methods. Joint use of diagnostic tools and computations gives a better understanding of mechanisms of interaction of plasma with bio-objects. This review focuses on recent achievements in modeling of plasma for biomedical applications. Various computational approaches used in these studies are described...
July 15, 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28719374/physical-and-chemical-stability-of-budesonide-mucoadhesive-oral-suspensions-mucolox
#8
Kendice Ip, Maria Carvalho, Ashley Shan, Daniel Banov
Budesonide is a corticosteroid that has been shown effective in the treatment of eosinophilic esophagitis, but there are currently no commercial medicines to treat this chronic allergic/immune condition, despite its prevalence in the U.S. Therefore, pharmaceutical compounding is the alternative choice to meet the therapeutic need of eosinophilic esophagitis patients. Two budesonide mucoadhesive oral suspensions (1 mg/10 mL and 2 mg/10 mL) were developed using the compounding vehicle MucoLox, a proprietary mucoadhesive polymer blend that promotes mucosal adhesion...
July 2017: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28719188/phage-selection-of-cyclic-peptides-for-application-in-research-and-drug-development
#9
Kaycie Deyle, Xu-Dong Kong, Christian Heinis
Cyclic peptides can bind to protein targets with high affinities and selectivities, which makes them an attractive modality for the development of research reagents and therapeutics. Additional properties, including low inherent toxicity, efficient chemical synthesis, and facile modification with labels or immobilization reagents, increase their attractiveness. Cyclic peptide ligands against a wide range of protein targets have been isolated from natural sources such as bacteria, fungi, plants, and animals...
July 18, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28717849/an-assessment-of-benzimidazole-resistance-against-caprine-nematodes-in-central-india
#10
A K Dixit, G Das, Pooja Dixit, A P Singh, N K Kumbhakar, M Sankar, R L Sharma
Current status of resistance to benzimidazole (BZ) group of anthelmintic drugs against caprine nematodes in Central India at Amanala goat farm, Jabalpur, Madhya Pradesh (M. P.), was systematically investigated using faecal egg count reduction (FECR) test and egg hatch test (EHT). Besides, allele-specific PCR (AS-PCR) was deployed to ascertain the susceptible genotype (alleles) especially of the Haemonchus contortus. Randomly selected 30 goats, irrespective of age and sex, were divided into three groups of 10 each, to serve as treated and untreated controls...
July 17, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28717316/induced-pluripotent-stem-cell-a-headway-in-reprogramming-with-promising-approach-in-regenerative-biology
#11
REVIEW
N Rawat, M K Singh
Since the embryonic stem cells have knocked the doorsteps, they have proved themselves in the field of science, research, and medicines, but the hovered restrictions confine their application in human welfare. Alternate approaches used to reprogram the cells to the pluripotent state were not up to par, but the innovation of induced pluripotent stem cells (iPSCs) paved a new hope for the researchers. Soon after the discovery, iPSCs technology is undergoing renaissance day by day, i.e., from the use of genetic material to recombinant proteins and now only chemicals are employed to convert somatic cells to iPSCs...
June 2017: Veterinary World
https://www.readbyqxmd.com/read/28716664/advances-and-challenges-in-the-search-for-d2-and-d3-dopamine-receptor-selective-compounds
#12
REVIEW
Amy E Moritz, R Benjamin Free, David R Sibley
Compounds that target D2-like dopamine receptors (DRs) are currently used as therapeutics for several neuropsychiatric disorders including schizophrenia (antagonists) and Parkinson's disease (agonists). However, as the D2R and D3R subtypes are highly homologous, creating compounds with sufficient subtype-selectivity as well as drug-like properties for therapeutic use has proved challenging. This review summarizes the progress that has been made in developing D2R- or D3R-selective antagonists and agonists, and also describes the experimental conditions that need to be considered when determining the selectivity of a given compound, as apparent selectivity can vary widely depending on assay conditions...
July 14, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28715245/enhanced-rutin-accumulation-in-tobacco-leaves-by-overexpressing-the-ntfls2-gene
#13
Junli Shi, Wenzheng Li, Yulong Gao, Bingwu Wang, Yong Li, Zhongbang Song
Rutin, one of the metabolites of the flavonoid pathway, shows great potential in industrial applications as a key component in pharmaceutical medicines and biological pesticides. Although the genetic manipulation of transcription factors (TFs) could increase rutin levels in plants, the accompanying accumulation of structurally similar chemicals complicates industrial rutin extraction. In this study, we demonstrated remarkably elevated rutin content (3.5-4.4-fold relative to controls) in transgenic tobacco plants by overexpressing NtFLS2...
July 17, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28715203/a-bioinorganic-approach-to-fragment-based-drug-discovery-targeting-metalloenzymes
#14
Seth M Cohen
Metal-dependent enzymes (i.e., metalloenzymes) make up a large fraction of all enzymes and are critically important in a wide range of biological processes, including DNA modification, protein homeostasis, antibiotic resistance, and many others. Consequently, metalloenzymes represent a vast and largely untapped space for drug development. The discovery of effective therapeutics that target metalloenzymes lies squarely at the interface of bioinorganic and medicinal chemistry and requires expertise, methods, and strategies from both fields to mount an effective campaign...
July 17, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28715190/chemical-topic-modeling-exploring-molecular-datasets-using-a-common-text-mining-approach
#15
Nadine Schneider, Nikolas Fechner, Gregory A Landrum, Nikolaus Stiefl
Big data is one of the key transformative factors which are increasingly influencing all aspects of modern life. Although this transformation brings vast opportunities it also generates novel challenges, not the least of which is organizing and searching this data deluge. The field of medicinal chemistry is not different: more and more data are being generated, for instance by technologies such as DNA encoded libraries, peptide libraries, text mining of large literature corpora, and new in silico enumeration methods...
July 17, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28714473/prioritizing-multiple-therapeutic-targets-in-parallel-using-automated-dna-encoded-library-screening
#16
Carl A Machutta, Christopher S Kollmann, Kenneth E Lind, Xiaopeng Bai, Pan F Chan, Jianzhong Huang, Lluis Ballell, Svetlana Belyanskaya, Gurdyal S Besra, David Barros-Aguirre, Robert H Bates, Paolo A Centrella, Sandy S Chang, Jing Chai, Anthony E Choudhry, Aaron Coffin, Christopher P Davie, Hongfeng Deng, Jianghe Deng, Yun Ding, Jason W Dodson, David T Fosbenner, Enoch N Gao, Taylor L Graham, Todd L Graybill, Karen Ingraham, Walter P Johnson, Bryan W King, Christopher R Kwiatkowski, Joël Lelièvre, Yue Li, Xiaorong Liu, Quinn Lu, Ruth Lehr, Alfonso Mendoza-Losana, John Martin, Lynn McCloskey, Patti McCormick, Heather P O'Keefe, Thomas O'Keeffe, Christina Pao, Christopher B Phelps, Hongwei Qi, Keith Rafferty, Genaro S Scavello, Matt S Steiginga, Flora S Sundersingh, Sharon M Sweitzer, Lawrence M Szewczuk, Amy Taylor, May Fern Toh, Juan Wang, Minghui Wang, Devan J Wilkins, Bing Xia, Gang Yao, Jean Zhang, Jingye Zhou, Christine P Donahue, Jeffrey A Messer, David Holmes, Christopher C Arico-Muendel, Andrew J Pope, Jeffrey W Gross, Ghotas Evindar
The identification and prioritization of chemically tractable therapeutic targets is a significant challenge in the discovery of new medicines. We have developed a novel method that rapidly screens multiple proteins in parallel using DNA-encoded library technology (ELT). Initial efforts were focused on the efficient discovery of antibacterial leads against 119 targets from Acinetobacter baumannii and Staphylococcus aureus. The success of this effort led to the hypothesis that the relative number of ELT binders alone could be used to assess the ligandability of large sets of proteins...
July 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28714385/therapeutic-application-of-natural-medicine-monomers-in-cancer-treatment
#17
Chen Zhong, Nathan R Wall, Yuangang Zu, Guangchao Sui
Natural medicine monomers (NMMs) isolated from plants have been recognized for their roles in treating different human diseases including cancers. Many NMMs exhibit effective anti-cancer activities and can be used as drugs or adjuvant agents to enhance the efficacy of chemotherapy and radiotherapy with low or tolerable side effects. Some NMMs, such as Paclitaxel and Camptothecin, have been extensively studied for decades and are now used as anti-cancer medicines due to their remarkable curative effects, such as inhibiting cancer cell proliferation and metastasis, and inducing cell death and differentiation...
July 14, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28713276/structure-activity-relationships-of-pentacyclic-triterpenoids-as-potent-and-selective-inhibitors-against-human-carboxylesterase-1
#18
Li-Wei Zou, Tong-Yi Dou, Ping Wang, Wei Lei, Zi-Miao Weng, Jie Hou, Dan-Dan Wang, Yi-Ming Fan, Wei-Dong Zhang, Guang-Bo Ge, Ling Yang
Human carboxylesterase 1 (hCE1), one of the most important serine hydrolases distributed in liver and adipocytes, plays key roles in endobiotic homeostasis and xenobiotic metabolism. This study aimed to find potent and selective inhibitors against hCE1 from phytochemicals and their derivatives. To this end, a series of natural triterpenoids were collected and their inhibitory effects against human carboxylesterases (hCEs) were assayed using D-Luciferin methyl ester (DME) and 6,8-dichloro-9,9-dimethyl-7-oxo-7,9-dihydroacridin-2-yl benzoate (DDAB) as specific optical substrate for hCE1, and hCE2, respectively...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28713203/solvatochromic-fluorescent-probes-for-recognition-of-human-serum-albumin-in-aqueous-solution-insights-into-structure-property-relationship
#19
Bin Liu, Xiaoman Bi, Lucas McDonald, Yi Pang, Danqing Liu, Chengjun Pan, Lei Wang
Human serum albumin (HSA) as the most abundant protein in human blood plasma, serves many physiological functions. The dysregulation of HSA in serum or in urine is associated with various diseases, such as cirrhosis of liver, multiple myeloma, and cardiovascular disease. Therefore, to quantify HSA in body fluids with high selectivity and sensitivity is of great significance for disease diagnosis and preventive medicine. We herein developed a series of amide-functionalized flavonoids probes, 1-3, for recognition of human serum albumin...
November 29, 2016: Sensors and Actuators. B, Chemical
https://www.readbyqxmd.com/read/28712298/the-fragment-network-a-chemistry-recommendation-engine-built-using-a-graph-database
#20
Richard J Hall, Christopher W Murray, Marcel L Verdonk
The hit validation stage of a fragment-based drug discovery campaign involves probing the SAR around one or more fragment hits. This often requires a search for similar compounds in a corporate collection or from commercial suppliers. The Fragment Network is a graph database that allows a user to efficiently search chemical space around a compound of interest. The result set is chemically intuitive, naturally grouped by substitution pattern and meaningfully sorted according to the number of observations of each transformation in medicinal chemistry databases...
July 15, 2017: Journal of Medicinal Chemistry
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