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https://www.readbyqxmd.com/read/28734161/evaluation-of-the-effect-of-extraction-solvent-and-organ-selection-on-the-chemical-profile-of-astragalus-spinosus-using-hptlc-multivariate-image-analysis
#1
Eman Shawky, Dina A Selim
The evaluation of extraction protocols for untargeted and targeted metabolomics was implemented for root and aerial organs of Astragalus spinosus in this work. The efficiency and complementarity of commonly used extraction solvents, namely petroleum ether, methylene chloride, ethyl acetate and n-butanol were considered for method evaluation using chemometric techniques in conjunction with new, simple, and fast high performance thin layer chromatography (HPTLC) method for fingerprint analysis by extracting information from a digitalized HPTLC plate using ImageJ software...
July 15, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28732379/integrative-analysis-of-novel-hypomethylation-and-gene-expression-signatures-in-glioblastomas
#2
Anan Yin, Amandine Etcheverry, Yalong He, Marc Aubry, Jill Barnholtz-Sloan, Luhua Zhang, Xinggang Mao, Weijun Chen, Bolin Liu, Wei Zhang, Jean Mosser, Xiang Zhang
Molecular and clinical heterogeneity critically hinders better treatment outcome for glioblastomas (GBMs); integrative analysis of genomic and epigenomic data may provide useful information for improving personalized medicine. By applying training-validation approach, we identified a novel hypomethylation signature comprising of three CpGs at non-CpG island (CGI) open sea regions for GBMs. The hypomethylation signature consistently predicted poor prognosis of GBMs in a series of discovery and validation datasets...
July 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28731863/screening-adolescents-for-alcohol-use-tracking-practice-trends-of-massachusetts-pediatricians
#3
Sharon Levy, Rosemary E Ziemnik, Sion K Harris, Lily Rabinow, Louise Breen, Christina Fluet, Heather Strother, John H Straus
OBJECTIVES: Substance use screening is a recommended component of routine healthcare for adolescents. A 2008 survey of Massachusetts primary care physicians found high rates of screening, but low rates of validated tool use, leading to the concern that physicians may be missing substance use-related problems and disorders. In an effort to improve practice, a cross-disciplinary group developed and distributed an adolescent screening, brief intervention, and referral to treatment toolkit in 2009...
July 20, 2017: Journal of Addiction Medicine
https://www.readbyqxmd.com/read/28731184/bufalin-reverses-acquired-drug-resistance-by-inhibiting-stemness-in-colorectal-cancer-cells
#4
Jian Sun, Ke Xu, Yanyan Qiu, Hong Gao, Jianhua Xu, Qingfeng Tang, Peihao Yin
Drug resistance is an obstacle to chemotherapy in tumor patients. Recent studies have shown that the high stemness of cancer cells may be induced by chemotherapeutic drugs, which is correlated with drug resistance. In the present study, we investigated the effects of bufalin on the stemness of colorectal cancer. We found that cisplatin could induce high stemness through the tumorsphere formation assay in vitro and in vivo in the colorectal cancer cell lines HCT116 and LoVo. In addition, cisplatin-treated tumorsphere cells showed drug‑resistant properties...
July 17, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28731036/stroke-in-women-from-evidence-to-inequalities
#5
REVIEW
Charlotte Cordonnier, Nikola Sprigg, Else Charlotte Sandset, Aleksandra Pavlovic, Katharina S Sunnerhagen, Valeria Caso, Hanne Christensen
Stroke is the second largest cause of disability-adjusted life-years lost worldwide. The prevalence of stroke in women is predicted to rise rapidly, owing to the increasing average age of the global female population. Vascular risk factors differ between women and men in terms of prevalence, and evidence increasingly supports the clinical importance of sex differences in stroke. The influence of some risk factors for stroke - including diabetes mellitus and atrial fibrillation - are stronger in women, and hypertensive disorders of pregnancy also affect the risk of stroke decades after pregnancy...
July 21, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28730958/engineering-synergistically-active-and-bioavailable-cost-effective-medicines-for-neglected-tropical-diseases-the-role-of-excipients
#6
Dolores R Serrano, Aikaterini Lalatsa, M Auxiliadora Dea-Ayuela
Leishmaniasis is a neglected tropical disease responsible for the ninth largest disease burden in the world threatening 350 million people mostly in developing countries. The lack of efficacy, severe adverse effects, long duration, high cost and parenteral administration of the current therapies result in poor patient compliance and emergence of resistance. Leishmaniasis' unmet need for safer, affordable and more effective treatments is only partly addressed by today's global health product pipeline that focuses on products amenable to rapid clinical development, mainly by reformulating or repurposing existing drugs for new uses...
July 19, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28730956/review-on-bioorganometallic-chemistry-and-new-outcomes-in-the-synthesis-and-substitution-of-tetracarbonyl-pyrrolylimine-complexes-of-rhenium-with-organophosphorus-ligands
#7
Antoine Simonneau, Franck Le Bideau, Jean-Hugues Mirebeau, Jérôme Marrot, Gérard Jaouen
: After a short review dealing with bioorganometallic chemistry, the synthesis of tetracarbonyl (pyrrolylimine) complexes of rhenium bearing chirality on the pyrrolyl ligands was reported.The reactivity of these compounds towards the substitution of one carbonyl ligand with triphenyl phosphine, tricyclohexyl phosphine and trimethyl phosphite was studied. The rhenium becoming a stereogenic center in that transformation, the resulting tricarbonyl species were obtained as mixtures of diastereomers, with diastereomeric excesses varying from 8 to 84%, according to the reaction conditions and the relative steric hindrances of the pyrrolylimine and the organophosphorus ligands...
July 19, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28730309/a-simple-and-rapid-infrared-assisted-self-enzymolysis-extraction-method-for-total-flavonoid-aglycones-extraction-from-scutellariae-radix-and-mechanism-exploration
#8
Liping Wang, Haotian Duan, Jiebing Jiang, Jiakun Long, Yingjia Yu, Guiliang Chen, Gengli Duan
A new, simple, and fast infrared-assisted self enzymolysis extraction (IRASEE) approach for the extraction of total flavonoid aglycones (TFA) mainly including baicalein, wogonin, and oroxylin A from Scutellariae Radix is presented to enhance extraction yield. Extraction enzymolysis temperature, enzymolysis liquid-to-solid ratio, enzymolysis pH, enzymolysis time and infrared power, the factors affecting IRASEE procedure, were investigated in a newly designed, temperature-controlled infrared-assisted extraction (TC-IRAE) system to acquire the optimum analysis conditions...
July 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28730160/epigenetic-interactions-between-alcohol-and-cannabinergic-effects-focus-on-histone-modification-and-dna-methylation
#9
Tiyash Parira, Alejandra Laverde, Marisela Agudelo
Epigenetic studies have led to a more profound understanding of the mechanisms involved in chronic conditions. In the case of alcohol addiction, according to the National Institute on Alcohol Abuse and Alcoholism, 16 million adults suffer from Alcohol Use Disorders (AUDs). Even though therapeutic interventions like behavioral therapy and medications to prevent relapse are currently available, no robust cure exists, which stems from the lack of understanding the mechanisms of action of alcohol and the lack of development of precision medicine approaches to treat AUDs...
April 2017: Journal of Alcoholism and Drug Dependence
https://www.readbyqxmd.com/read/28729958/mutational-analysis-of-driver-genes-with-tumor-suppressive-and-oncogenic-roles-in-gastric-cancer
#10
Tianfang Wang, Yining Liu, Min Zhao
Gastric cancer (GC) is a complex disease with heterogeneous genetic mechanisms. Genomic mutational profiling of gastric cancer not only expands our knowledge about cancer progression at a fundamental genetic level, but also could provide guidance on new treatment decisions, currently based on tumor histology. The fact that precise medicine-based treatment is successful in a subset of tumors indicates the need for better identification of clinically related molecular tumor phenotypes, especially with regard to those driver mutations on tumor suppressor genes (TSGs) and oncogenes (ONGs)...
2017: PeerJ
https://www.readbyqxmd.com/read/28729428/fluorine-18-labeled-carboplatin-derivative-for-pet-imaging-of-platinum-drug-distribution
#11
Narottam Lamichhane, Gajanan K Dewkar, Sundaresan Gobalakrishnan, Li Wang, Purnima Jose, Muhammad Otabashi, Jean-Luc Morelle, Nicholas Farrell, Jamal Zweit
Increasing evidence indicates that reduced intracellular drug accumulation is the parameter most consistently associated with platinum drug resistance, and emphasizes the need to directly measure intra-tumor drug concentration. In the era of precision medicine and with the advent of powerful imaging and proteomics technologies, there is an opportunity to better understand drug resistance, by exploiting these techniques to provide new knowledge on drug-target interactions. Here, we are contributing to this endeavor by reporting on the development of a fluorine-18 labeled carboplatin derivative ((18)F-FCP) that can be used to potentially image drug uptake and retention, including intra-tumoral distribution, by positron emission tomography (PET)...
July 20, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28729406/tumor-evolution-as-a-therapeutic-target
#12
REVIEW
Nabil Amirouchene-Angelozzi, Charles Swanton, Alberto Bardelli
Recent technological advances in the field of molecular diagnostics (including blood-based tumor genotyping) allow the measurement of clonal evolution in patients with cancer, thus adding a new dimension to precision medicine: time. The translation of this new knowledge into clinical benefit implies rethinking therapeutic strategies. In essence, it means considering as a target not only individual oncogenes but also the evolving nature of human tumors. Here, we analyze the limitations of targeted therapies and propose approaches for treatment within an evolutionary framework...
July 20, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28728596/implementation-of-longevity-promoting-supplements-and-medications-in-public-health-practice-achievements-challenges-and-future-perspectives
#13
REVIEW
Alexander Vaiserman, Oleh Lushchak
BACKGROUND: Most modern societies undergo rapid population aging. The rise in life expectancy, nevertheless, is not accompanied, to date, by the same increment of healthspan. Efforts to increase healthspan by means of supplements and pharmaceuticals targeting aging-related pathologies are presently in spotlight of a new branch in geriatric medicine, geroscience, postulating that aging could be manipulated in such a way that will in parallel allow delay the onset of all age-associated chronic disorders...
July 20, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28727990/new-heterocyclic-compounds-from-ranunculus-ternatus-thunb
#14
Zi-Ming Feng, Zhi-Lai Zhan, Ya-Nan Yang, Jian-Shuang Jiang, Pei-Cheng Zhang
Five new heterocyclic compounds, 5-α-d-fructofuranosylmethyl-furfural (1), 5-β-d-fructofuranosylmethyl-furfural (2), 5-β-d-fructopyranosylmethyl-furfural (3), 4-(2-((2S-2,3-dihydroxypropoxy)methyl)-5-formyl-1H-pyrrol-1-yl)butanoic acid (4), and 3S,4S-4,5,8-trihydroxy-3-(prop-1-en-2-yl)isochroman-1-one (5), were obtained from the root of Ranunculus ternatus Thunb., which is a traditional Chinese anti-tuberculosis medicine. Their structures were elucidated by UV, IR, HRESIMS, NMR data, and the comparison of experimental and calculated electronic circular dichroism (ECD) spectra...
July 12, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28727859/space-flight-associated-neuro-ocular-syndrome
#15
Andrew G Lee, Thomas H Mader, C Robert Gibson, William Tarver
New and unique physiologic and pathologic systemic and neuro-ocular responses have been documented in astronauts during and after long-duration space flight. Although the precise cause remains unknown, space flight-associated neuro-ocular syndrome (SANS) has been adopted as an appropriate descriptive term. The Space Medicine Operations Division of the US National Aeronautics and Space Administration (NASA) has documented the variable occurrence of SANS in astronauts returning from long-duration space flight on the International Space Station...
July 20, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28727700/therapeutic-role-of-placebo-evolution-of-a-new-paradigm-in-understanding-research-and-clinical-practice
#16
Laxmaiah Manchikanti, Mark V Boswell, Alan D Kaye, Standiford Helm Ii, Joshua A Hirsch
Research into interventional techniques in managing chronic spinal pain continues to be challenging, mystifying, confusing, and biased. Insight, or lack thereof, into placebo and nocebo phenomena contributes mightily to these difficulties. Unfortunately, placebo-nocebo responses are the subject of numerous controversies and challenges from not only a research perspective, but also clinical perspective. While interventionalists consider the biggest threat to interventional pain management research is inappropriate and outdated interpretation of the data, a greater problem is the misuse of the placebo response in research, with the declaration that all and everything as a placebo effect: with a misinterpretation of the nature of the placebo the, associated conclusions can be inaccurate...
July 2017: Pain Physician
https://www.readbyqxmd.com/read/28727481/leucocyte-and-platelet-rich-fibrin-l-prf-as-a-regenerative-medicine-strategy-for-the-treatment-of-refractory-leg-ulcers-a-prospective-cohort-study
#17
Nelson R Pinto, Matias Ubilla, Yelka Zamora, Verónica Del Rio, David M Dohan Ehrenfest, Marc Quirynen
Chronic wounds (VLU: venous leg ulcer, DFU: diabetic foot ulcer, PU: pressure ulcer, or complex wounds) affect a significant proportion of the population. Despite appropriate standard wound care, such ulcers unfortunately may remain open for months or even years. The use of leukocyte- and platelet-rich fibrin (L-PRF) to cure skin ulcers is a simple and inexpensive method, widely used in some countries but unknown or neglected in most others. This auto-controlled prospective cohort study explored and quantified accurately for the first time the adjunctive benefits of topical applications of L-PRF in the management of such refractory ulcers in a diverse group of patients...
July 20, 2017: Platelets
https://www.readbyqxmd.com/read/28726979/chronic-disease-registries-trends-and-challenges
#18
Joachim Schüz, Michael Fored
BACKGROUND: This accompanying editorial is an introduction to the focus theme of "chronic disease registries - trends and challenges". METHODS: A call for papers was announced on the website of Methods of Information in Medicine in April 2016 with submission deadline in September 2016. A peer review process was established to select the papers for the focus theme, managed by two guest editors. RESULTS: Three papers were selected to be included in the focus theme...
July 19, 2017: Methods of Information in Medicine
https://www.readbyqxmd.com/read/28726934/clove-extract-functions-as-a-natural-fatty-acid-synthesis-inhibitor-and-prevents-obesity-in-a-mouse-model
#19
Yiran Ding, Zhennan Gu, Yihe Wang, Shunhe Wang, Haiqin Chen, Hao Zhang, Wei Chen, Yong Q Chen
Numerous medicinal plants have been reported to prevent various chronic diseases. In this study, we screened a new FASN inhibitor-alcohol extract of clove (AEC) using a fast microplate method developed in our laboratory. The major components of AEC were: eugenol (42.27%), acetyl eugenol (29.12%), caryophyllene (15.40%), and humulene (3.22%). Fatty acid synthase (FASN) is a key enzyme for de novo lipogenesis, and it has been suggested as a potential therapeutic target in cancer and obesity. We have tested the ability of AEC to inhibit FASN in mammalian cells and tissues...
July 20, 2017: Food & Function
https://www.readbyqxmd.com/read/28726855/cyclodextrin-based-biological-stimuli-responsive-carriers-for-smart-and-precision-medicine
#20
Rongqiang Liao, Pin Lv, Qian Wang, Jiaoni Zheng, Bing Feng, Bo Yang
Spurred on by recent progress in nanotechnology and precision medicine, smart drug carriers are entering an entirely new era. Smart drug carriers have been widely studied in recent years as a result of their ability to control drug release under different microenvironments (such as pH, redox, and enzyme) in vivo. Host-guest interactions based on cyclodextrins have proven to be an efficient tool for fabricating smart drug carriers. Because of the application of host-guest interactions, many kinds of biological molecules or supramolecular building blocks can combine into an organic whole at the molecular level...
July 20, 2017: Biomaterials Science
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