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https://www.readbyqxmd.com/read/29235356/biomimetic-total-syntheses-of-clavine-alkaloids
#1
Saikat Chaudhuri, Subhajit Bhunia, Avishek Roy, Mrinal K Das, Alakesh Bisai
Biomimetic total syntheses of either enantiomers of a number of ergot alkaloids, chanoclavine I (1b), chanoclavine I aldehyde (1c), pyroclavine (1e), festuclavine (1f), pibocin A (1g), 9-deacetoxyfumigaclavine C (1h), and fumigaclavine G (1i), have been achieved from seco-agroclavine (1a). The advanced intermediate for seco-agroclavine (1a) was synthesized via a key thiourea-catalyzed intramolecular nitronate addition onto α,β-unsaturated ester.
December 13, 2017: Organic Letters
https://www.readbyqxmd.com/read/29226741/side-effects-associated-with-current-and-prospective-antimigraine-pharmacotherapies
#2
Abimael González-Hernández, Bruno A Marichal-Cancino, Antoinette MaassenVanDenBrink, Carlos M Villalón
Migraine is a neurovascular disorder. Current acute specific antimigraine pharmacotherapies target trigeminovascular 5-HT1B/1D, 5-HT1F and CGRP receptors but, unfortunately, they induce some cardiovascular and central side effects that lead to poor treatment adherence/compliance. Therefore, new antimigraine drugs are being explored. Areas covered. This review considers the adverse (or potential) side effects produced by current and prospective antimigraine drugs, including medication overuse headache (MOH) produced by ergots and triptans, the side effects observed in clinical trials for the new gepants and CGRP antibodies, and a section discussing the potential effects resulting from disruption of the cardiovascular CGRPergic neurotransmission...
December 9, 2017: Expert Opinion on Drug Metabolism & Toxicology
https://www.readbyqxmd.com/read/29186777/clavine-alkaloids-gene-clusters-of-penicillium-and-related-fungi-evolutionary-combination-of-prenyltransferases-monooxygenases-and-dioxygenases
#3
REVIEW
(no author information available yet)
The clavine alkaloids produced by the fungi of the Aspergillaceae and Arthrodermatacea families differ from the ergot alkaloids produced by Claviceps and Neotyphodium. The clavine alkaloids lack the extensive peptide chain modifications that occur in lysergic acid derived ergot alkaloids. Both clavine and ergot alkaloids arise from the condensation of tryptophan and dimethylallylpyrophosphate by the action of the dimethylallyltryptophan synthase. The first five steps of the biosynthetic pathway that convert tryptophan and dimethylallyl-pyrophosphate (DMA-PP) in chanoclavine-1-aldehyde are common to both clavine and ergot alkaloids...
November 24, 2017: Genes
https://www.readbyqxmd.com/read/29172518/ergot-alkaloid-biosynthesis-in-the-maize-zea-mays-ergot-fungus-claviceps-gigantea
#4
Paige E Bragg, Matthew D Maust, Daniel G Panaccione
The biosynthesis of the dihydrogenated forms of ergot alkaloids is of interest because many of the ergot alkaloids used as pharmaceuticals may be derived from dihydrolysergic acid (DHLA) or its precursor dihydrolysergol. The maize (Zea mays) ergot pathogen Claviceps gigantea has been reported to produce dihydrolysergol, a hydroxylated derivative of the common ergot alkaloid festuclavine. We hypothesized expression of C. gigantea cloA in a festuclavine-accumulating mutant of the fungus Neosartorya fumigata would yield dihydrolysergol, because the P450 monooxygenase CloA from other fungi performs similar oxidation reactions...
November 26, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29171818/fremanezumab-for-the-preventive-treatment-of-chronic-migraine
#5
Stephen D Silberstein, David W Dodick, Marcelo E Bigal, Paul P Yeung, Peter J Goadsby, Tricia Blankenbiller, Melissa Grozinski-Wolff, Ronghua Yang, Yuju Ma, Ernesto Aycardi
BACKGROUND: Fremanezumab, a humanized monoclonal antibody targeting calcitonin gene-related peptide (CGRP), is being investigated as a preventive treatment for migraine. We compared two fremanezumab dose regimens with placebo for the prevention of chronic migraine. METHODS: In this phase 3 trial, we randomly assigned patients with chronic migraine (defined as headache of any duration or severity on ≥15 days per month and migraine on ≥8 days per month) in a 1:1:1 ratio to receive fremanezumab quarterly (a single dose of 675 mg at baseline and placebo at weeks 4 and 8), fremanezumab monthly (675 mg at baseline and 225 mg at weeks 4 and 8), or matching placebo...
November 30, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/29164358/medical-and-neuropsychiatric-phenomena-depicted-in-two-spanish-medieval-texts-of-marian-miracles
#6
Francisco de Assis Aquino Gondim, Pamela Bastante, Wilcar Cavalcante Gondim, Joana Gurgel Holanda Filha, Florian P Thomas
In the history of Christianity, veneration of the Virgin Mary reached its greatest intensity in the XIII century. Her perceived impact on daily life was tremendous and not surprisingly this extended to the spheres of disease and healing. The purpose of this study is to compare the medical and neuropsychiatric findings in two XIII century Spanish texts of Marian miracles, both examples of the popular Catholicism (vs. official catholic doctrine). We analyzed the medical and neuropsychiatric events in the Cantigas de Santa Maria (Canticles of St...
November 21, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/29164312/efficacy-and-safety-of-rotigotine-in-elderly-patients-with-parkinson-s-disease-in-comparison-with-the-non-elderly-a-post-hoc-analysis-of-randomized-double-blind-placebo-controlled-trials
#7
Masahiro Nomoto, Hirotaka Iwaki, Hiroyuki Kondo, Masaya Sakurai
Rotigotine-a non-ergot dopamine agonist-has two advantages; it can stimulate all dopamine receptors (D1-D5) like innate dopamine, and its transdermal administration provides continuous dopaminergic stimulation. The age of the patient impacts the effect and adverse events of anti-parkinsonian treatment. We conducted a post hoc analysis on three randomized, double-blind, placebo-controlled trials performed in Japan to clarify the difference of anti-parkinsonian treatment in elderly and non-elderly patients. Data from two combination therapy trials (with levodopa) in advanced stage Parkinson's disease patients and one monotherapy trial in early stage patients were pooled and grouped by age (non-elderly aged < 70, elderly aged 70 +)...
November 21, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29151097/the-dancing-manias-psychogenic-illness-as-a-social-phenomenon
#8
Douglas J Lanska
The dancing mania erupted in the 14th century in the wake of the Black Death, and recurred for centuries in central Europe - particularly Germany, the Netherlands, and Belgium - finally abating in the early 17th century. The term "dancing mania" was derived from "choreomania," a concatenation of choros (dance) and mania (madness). A variant, tarantism, was prevalent in southern Italy from the 15th to the 17th centuries, and was attributed at the time to bites from the tarantula spider. Affected individuals participated in continuous, prolonged, erratic, often frenzied and sometimes erotic, dancing...
2018: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/29062667/hair-transplantation-in-migraine-headache-patients
#9
Safvet Ors
BACKGROUND: Migraine headache is a primary neurologic disease affecting millions of people worldwide. As a consequence, quality of life is diminished, productivity suffers (through loss of work force), and treatment costs are substantial. The occurrence rate in the general population is quite high, with women accounting for 3 of every 4 cases. METHODS: Between January 2011 and May 2012, a total of 221 patients received hair transplants. Another 590 patients underwent hair transplantation between June 2012 and December 2016...
September 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/29058089/evidence-based-treatment-of-neurogenic-orthostatic-hypotension-and-related-symptoms
#10
REVIEW
Sabine Eschlböck, Gregor Wenning, Alessandra Fanciulli
Neurogenic orthostatic hypotension, postprandial hypotension and exercise-induced hypotension are common features of cardiovascular autonomic failure. Despite the serious impact on patient's quality of life, evidence-based guidelines for non-pharmacological and pharmacological management are lacking at present. Here, we provide a systematic review of the literature on therapeutic options for neurogenic orthostatic hypotension and related symptoms with evidence-based recommendations according to the Grading of Recommendations Assessment, Development and Evaluation (GRADE)...
December 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29051065/dihydroergotamine-mesylate-loaded-dissolving-microneedle-patch-made-of-polyvinylpyrrolidone-for-management-of-acute-migraine-therapy
#11
Cetin Tas, Jessica C Joyce, Hiep X Nguyen, Padmanabhan Eangoor, Jennifer S Knaack, Ajay K Banga, Mark R Prausnitz
Migraine is a widespread neurological disease with negative effects on quality of life and productivity. Moderate to severe acute migraine attacks can be treated with dihydroergotamine mesylate (DHE), an ergot derivative that is especially effective in non-responders to triptan derivatives. To overcome limitations of current DHE formulations in subcutaneous injection and nasal spray such as pain, adverse side effects and poor bioavailability, a new approach is needed for DHE delivery enabling painless self-administration, quick onset of action, and high bioavailability...
October 16, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29033019/processing-of-mycotoxin-contaminated-waste-streams-through-anaerobic-digestion
#12
L De Gelder, K Audenaert, B Willems, K Schelfhout, S De Saeger, M De Boevre
Food and feed stocks heavily contaminated with mycotoxins are rendered unfit for consumption and therefore discarded as waste. Due to the lack of guidelines and in accordance with the prudent avoidance principle, these waste streams are often incinerated. For better valorization, these streams could be used as input for anaerobic digestion. However, the degradation of multiple mycotoxins during anaerobic digestion and their effect on the methane production is currently unknown. In batch tests spiked with mycotoxins, aflatoxin B1, ochratoxin A, deoxynivalenol, zearalenone and T-2 toxin were degraded for more than 90%...
October 9, 2017: Waste Management
https://www.readbyqxmd.com/read/28993209/rotigotine-a-dopamine-receptor-agonist-increased-bdnf-protein-levels-in-the-rat-cortex-and-hippocampus
#13
Naoki Adachi, Aya Yoshimura, Shuichi Chiba, Shintaro Ogawa, Hiroshi Kunugi
Brain-derived neurotrophic factor (BDNF) critically controls the fate and function of the neuronal network and has received much attention as a target of many brain diseases. Dopaminergic system dysfunction has also been implicated in a variety of neuropsychiatric diseases. Rotigotine, a non-ergot dopamine receptor agonist, is used in the treatment of Parkinson's disease and restless legs syndrome. To investigate the effects of rotigotine on neuronal functions both in vivo and in vitro, rats and primary cortical neurons were administered rotigotine, and the mRNA and protein expression levels of BDNF, its receptor TrkB and downstream signaling molecules, and synaptic proteins were determined...
January 1, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/28990165/framingham-based-cardiovascular-risk-estimates-among-people-with-episodic-migraine-in-the-us-population-results-from-the-american-migraine-prevalence-and-prevention-ampp-study
#14
Richard B Lipton, Michael L Reed, Tobias Kurth, Kristina M Fanning, Dawn C Buse
BACKGROUND: Cardiovascular (CV) events, conditions, and procedures (ECPs) are common in persons with migraine and are a contraindication to triptan and ergot use. In a prior study, we estimated that there are 2.6 million American adults with episodic migraine (EM) who have had CV ECPs. However, the prior analysis did not assess persons with migraine without CV ECPs who are at high risk for a first cardiovascular disease (CVD) event. OBJECTIVES: To use the Framingham nonlaboratory CVD events risk equation to estimate the number of individuals with EM who are at elevated risk for a first CVD event in the next 10 years using data from the American Migraine Prevalence and Prevention Study, and then to extrapolate the findings to the US population to estimate the scope of people with EM for whom triptan and ergot therapies may be problematic...
October 9, 2017: Headache
https://www.readbyqxmd.com/read/28989805/migraine-and-stroke
#15
REVIEW
Yonghua Zhang, Aasheeta Parikh, Shuo Qian
Migraines are generally considered a relatively benign neurological condition. However, research has shown an association between migraines and stroke, and especially between migraine with aura and ischaemic stroke. Patients can also suffer from migrainous infarction, a subset of ischaemic stroke that often occurs in the posterior circulation of younger women. The exact pathogenesis of migrainous infarct is not known, but it is theorised that the duration and local neuronal energy level from cortical spreading depression may be a key factor...
September 2017: Stroke and Vascular Neurology
https://www.readbyqxmd.com/read/28964275/detection-of-total-ergot-alkaloids-in-cereal-flour-and-in-bread-by-a-generic-enzyme-immunoassay-method
#16
Madeleine Gross, Valeriu Curtui, Ewald Usleber
Four sets of polyclonal antibodies against ergot alkaloids ergometrine, ergotamine, α-ergocryptine, and ergocornine were produced and characterized in a competitive direct or indirect enzyme immunoassay (EIA). Standard curve LODs were 0.03 ng/mL (ergometrine EIA) to 2.0 ng/mL (ergocornine EIA). Three EIAs were highly specific, whereas the ergometrine EIA had a broad specificity pattern and reacted, albeit weakly, with all seven major ergot alkaloids and their epimeric forms. Using the ergometrine EIA, a generic test system was established in which total ergot alkaloids are quantified by a standard curve for a toxin mixture composed of three alkaloids that matched the ergot alkaloid composition in naturally contaminated rye and wheat products...
October 2, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28948617/motor-vehicle-accidents-in-parkinson-s-disease-a-questionnaire-study
#17
T Ueno, T Kon, R Haga, H Nishijima, M Tomiyama
OBJECTIVES: Few studies have investigated the risk factors for motor vehicle accidents (MVA) in individuals with Parkinson's disease (PD) in Japan. MATERIALS AND METHODS: We sent an anonymous questionnaire to 1417 patients with PD who had received medical care certificates for Intractable Diseases during the 2014 fiscal year from the Aomori Prefectural Government in Japan. Data from patients with PD who previously or currently held a driving license at the time of the survey were analyzed...
September 25, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28902910/pituitary-genomic-expression-profiles-of-steers-are-altered-by-grazing-of-high-vs-low-endophyte-infected-tall-fescue-forages
#18
Qing Li, Raquel Hegge, Phillip J Bridges, James C Matthews
Consumption of ergot alkaloid-containing tall fescue grass impairs several metabolic, vascular, growth, and reproductive processes in cattle, collectively producing a clinical condition known as "fescue toxicosis." Despite the apparent association between pituitary function and these physiological parameters, including depressed serum prolactin; no reports describe the effect of fescue toxicosis on pituitary genomic expression profiles. To identify candidate regulatory mechanisms, we compared the global and selected targeted mRNA expression patterns of pituitaries collected from beef steers that had been randomly assigned to undergo summer-long grazing (89 to 105 d) of a high-toxic endophyte-infected tall fescue pasture (HE; 0...
2017: PloS One
https://www.readbyqxmd.com/read/28902217/a-bifunctional-old-yellow-enzyme-from-penicillium-roqueforti-is-involved-in-ergot-alkaloid-biosynthesis
#19
Nina Gerhards, Shu-Ming Li
The blue cheese-making fungus Penicillium roqueforti produces isofumigaclavine A as the main ergot alkaloid. Recently, genome mining revealed the presence of two DNA loci bearing the genetic potential for its biosynthesis. In this study, a short-chain dehydrogenase/reductase (SDR) from one of the loci was proved to be responsible for the conversion of chanoclavine-I to its aldehyde. Furthermore, a putative gene coding for an enzyme with high homology to Old Yellow Enzymes (OYEs) involved in the ergot alkaloid biosynthesis was found outside the two clusters...
October 4, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28870326/molecularly-imprinted-polymers-immobilized-on-3d-printed-scaffolds-as-novel-solid-phase-extraction-sorbent-for-metergoline
#20
Gilke De Middeleer, Peter Dubruel, Sarah De Saeger
In the present work, a novel solid phase extraction (SPE) sorbent was developed based on molecularly imprinted polymers (MIPs) immobilized on 3D-printed scaffolds using polymer networks as MIP-immobilizing layer. MIPs were produced by precipitation polymerization in acetonitrile (ACN) using methacrylic acid (MAA) as functional monomer, trimethylolpropane trimethacrylate (TRIM) as crosslinker and metergoline as model template which allows final recognition of ergot alkaloid mycotoxins. Scanning electron microscopy (SEM) and dynamic light scattering (DLS) analyses showed an average MIP particle size of 457 ± 145 nm...
September 15, 2017: Analytica Chimica Acta
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