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Natural medicine

Y-C Huang, J Xiao, W Y Leung, W W Lu, Y Hu, K D Luk
Previous human study suggested that fresh-frozen intervertebral disc allograft transplantation can relieve neurological symptoms and restore segmental kinematics. Before wide clinical application, research into the pathophysiology of the postoperative disc allograft is needed. One important question that remains to be answered in disc allografting is the healing process of the host-graft interface and the subsequent change of the endplates. With the goat model for lumbar disc allografting, histology, micro-computed tomography analysis, scanning electron microscopy and energy-dispersive X-ray spectroscopy mapping were applied to evaluate the healing of the host-graft interfaces, the remodelling of subchondral bone, and the changes of the bony and cartilaginous endplates after transplantation...
October 19, 2016: European Cells & Materials
Grace Yim, Wenliang Wang, Maulik N Thaker, Stephanie Tan, Gerard D Wright
Modification of natural product backbones is a proven strategy for the development of clinically useful antibiotics. Such modifications have traditionally been achieved through medicinal chemistry strategies or via in vitro enzymatic activities. In an orthogonal approach, engineering of biosynthetic pathways using synthetic biology techniques can generate chemical diversity. Here we report the use of a minimal teicoplanin class glycopeptide antibiotic (GPA) scaffold expressed in a production-optimized Streptomyces coelicolor strain to expand GPA chemical diversity...
September 9, 2016: ACS Infectious Diseases
Stefan Holdenrieder
Liquid profiling is a traditional concept in laboratory diagnostics using patterns of blood-derived biochemical molecules for disease detection and characterization. Beyond protein and cellular parameters, molecular biomarkers at the DNA, RNA and miRNA level have been developed as promising diagnostic tools in metabolic and malignant diseases as new technologies for ultrasensitive profiling of nucleic acids in blood and body fluids became available. In cancer disease, they are successfully applied for the stratification of patients for individually tailored therapies, treatment monitoring and the sensitive detection of minimal residual disease...
2016: Advances in Experimental Medicine and Biology
Michael V Lombardo, Meng-Chuan Lai, Bonnie Auyeung, Rosemary J Holt, Carrie Allison, Paula Smith, Bhismadev Chakrabarti, Amber N V Ruigrok, John Suckling, Edward T Bullmore, Christine Ecker, Michael C Craig, Declan G M Murphy, Francesca Happé, Simon Baron-Cohen
Individuals affected by autism spectrum conditions (ASC) are considerably heterogeneous. Novel approaches are needed to parse this heterogeneity to enhance precision in clinical and translational research. Applying a clustering approach taken from genomics and systems biology on two large independent cognitive datasets of adults with and without ASC (n = 694; n = 249), we find replicable evidence for 5 discrete ASC subgroups that are highly differentiated in item-level performance on an explicit mentalizing task tapping ability to read complex emotion and mental states from the eye region of the face (Reading the Mind in the Eyes Test; RMET)...
October 18, 2016: Scientific Reports
Mohamed M M Abdel-Latif, Mekky M Abouzied
BACKGROUND AND AIMS: Natural honey has been used as a medicine since ancient times. Honey is widely known for its antibacterial properties against H. pylori; however, the mechanisms of its antibacterial activity are not fully known. The present study was performed to examine the molecular mechanisms by which natural honey can inhibit H. pylori infection in gastric epithelial cells. METHODS: Electrophoretic mobility shift assay was used to measure NF-κB- and AP-1-DNA binding activity...
July 2016: Archives of Medical Research
Claudia Weilbeer, Marcel Sickert, Sergej Naumov, Christoph Schneider
We disclose herein the first enantioselective aza-Diels-Alder reaction of b-alkyl-substituted vinylketene silyl-O,O-acetals and imines furnishing a broad range of optically highly enriched 4-alkyl-substituted 2-piperidones. As catalyst for this one-pot reaction we employed a chiral phosphoric acid which effects a vinylogous Mannich reaction directly followed by ring-closure to the lactam. Subsequent fully diastereoselective transformations including hydrogenation, enolate alkylation, and lactam alkylation/reduction processes converted the cycloadducts into various highly substituted piperidines of great utility for the synthesis of natural products and medicinally active compounds...
October 17, 2016: Chemistry: a European Journal
Dario Vazquez-Albacete, Ana Mafalda Cavaleiro, Ulla Christensen, Susanna Seppälä, Birger Lindberg Møller, Morten H H Nørholm
Membrane-associated Cytochromes P450 (P450s) are one of the most important enzyme families for biosynthesis of plant-derived medicinal compounds. However, the hydrophobic nature of P450s makes their use in robust cell factories a challenge. Here we explore a small library of N-terminal expression tag chimeras of the model plant P450 CYP79A1 in different Escherichia coli strains. Using a high-throughput screening platform based on C-terminal GFP fusions, we identify several highly expressing and robustly performing chimeric designs...
October 17, 2016: Biotechnology and Bioengineering
Mark W Lowdell, Amy Thomas
Advanced therapy medicinal products (ATMPs) represent the current pinnacle of 'patient-specific medicines' and will change the nature of medicine in the near future. They fall into three categories; somatic cell-therapy products, gene therapy products and cells or tissues for regenerative medicine, which are termed 'tissue engineered' products. The term also incorporates 'combination products' where a human cell or tissue is combined with a medical device. Plainly, many of these new medicines share similarities with conventional haematological stem cell transplant products and donor lymphocyte infusions as well as solid organ grafts and yet ATMPs are regulated as medicines and their development has remained predominantly in academic settings and within specialist centres...
October 17, 2016: British Journal of Haematology
J Caruano, G G Muccioli, R Robiette
The γ-lactam moiety is present in a large number of natural and non-natural biologically active compounds. The range of biological activities covered by these compounds is very broad. Functionalized γ-lactams are thus of high interest and have great potential in medicinal chemistry. This review provides a description of the title compounds by focusing on their synthesis, natural sources and biological activities.
October 17, 2016: Organic & Biomolecular Chemistry
Maria Campos, C Batista, N R Jesus, C M Silva, T P Silva
Cardiovascular patients frequently use herbal medicinal products, in order to contribute to the improvement of their chronic condition without medical intervention. However, they are likely to suffer from adverse effects from natural products and herb-drug interactions. This work aimed to alert cardiovascular patients and healthcare providers of the potential of occurrence of herb-drug interactions with cardiovascular therapy. Information obtained from the campaign "Aprender Saúde Entre as Plantas e os Medicamentos", carried out by the Observatory of Herb-Drug Interactions (www...
October 7, 2016: Cardiovascular & Hematological Agents in Medicinal Chemistry
Filipa Alves da Costa, Luísa Silvestre, Catarina Periquito, Clara Carneiro, Pedro Oliveira, Ana Isabel Fernandes, Patrícia Cavaco-Silva
BACKGROUND: Currently, people live longer but often with poor quality of life. The decrease in healthy life-years is partly attributable to the institution of polypharmacy to treat various comorbidities. OBJECTIVES: The objectives of the study were to determine the prevalence and nature of drug-related problems (DRPs) in polypharmacy elderly patients residing in nursing homes and to test the acceptability of a pharmacist's intervention. METHODS: An exposure cohort was constituted in three Portuguese nursing homes, where all polypharmacy (five or more medicines) elderly patients (≥65 years of age) were analysed and then a random stratified sample was extracted to be subject to an intervention...
March 2016: Drugs—Real World Outcomes
Johannes Bircher, Eckhart G Hahn
This paper explores the diagnostic and therapeutic potential of a new concept of health. Investigations into the nature of health have led to a new definition that explains health as a complex adaptive system (CAS) and is based on five components (a-e). Humans like all biological creatures must satisfactorily respond to (a) the demands of life. For this purpose they need (b) a biologically given potential (BGP) and (c) a personally acquired potential (PAP). These properties of individuals are embedded within (d) social and (e) environmental determinants of health...
2016: F1000Research
Jed F Fisher, Shahriar Mobashery
The practice of medicine was profoundly transformed by the introduction of the antibiotics (compounds isolated from Nature) and the antibacterials (compounds prepared by synthesis) for the control of bacterial infection. As a result of the extraordinary success of these compounds over decades of time, a timeless biological activity for these compounds has been presumed. This presumption is no longer. The inexorable acquisition of resistance mechanisms by bacteria is retransforming medical practice. Credible answers to this dilemma are far better recognized than they are being implemented...
January 1, 2016: MedChemComm
Xinchi Wu, Juan Xu
Hispidulin is a naturally occurring flavonoid isolated from a traditional Chinese medicinal herb, Saussurea involucrata. In this study, the regulating role of hispidulin on the mRNA expression level of enzymes involved in lipid metabolism was examined in vitro and in vivo. Moreover, the in vivo lipid-modulating effect of hispidulin was compared with that of fenofibrate, a classical PPARα agonist. Our results in present study demonstrated that hispidulin can directly bind to and activate PPARα as an agonist and thus modulate the downstream lipid-metabolizing genes...
October 15, 2016: Lipids
Adam S Cheifetz, Robert Gianotti, Raphael Luber, Peter R Gibson
Patients and physicians often have many questions regarding the role of complementary and alternative medicines (CAMs), or non-allopathic therapies, for inflammatory bowel diseases (IBD). CAMs of various forms are used by more than half of patients with IBD during some point in their disease course. We summarize the available evidence for the most commonly used and discussed CAMs. We discuss evidence for the effects of herbs (such as cannabis and curcumin), probiotics, acupuncture, exercise, and mind-body therapy...
October 12, 2016: Gastroenterology
Mahendra Kumar Trivedi, Parthasarathi Panda, Kalyan Kumar Sethi, Snehasis Jana
Ashwagandha (Withania somnifera) is a very well-known herbal medicine and it was well studied for its active metabolites throughout the World. Although, nearly 40 withanolides were isolated from W. somnifera root extract, still there is remaining unidentified metabolites due to very low abundance and natural variation. Advanced separation technology with online identification by mass and nuclear magnetic resonance (NMR) are now-a-days used to find out the new compounds in the crude herbal extract. This article described the metabolite profiling of ashwagandha root hydroalcoholic extract using ultra-performance liquid chromatography coupled with a positive ion electrospray ionization tandem mass spectrometry through gas chromatography mass spectrometry (GC-MS) and NMR analysis...
October 15, 2016: Chemistry & Biodiversity
Jovana Trifunović, Vladan Borčić, Momir Mikov
Some biological properties of bile acids and their oxo derivatives have not been sufficiently investigated, although the interest for bile acids as signaling molecules is rising. The aim of this work was to evaluate physico-chemical parametar b (slope) that represents lipophilicity of the examined molecules and to investigate interactions of bile acids with carbonic anhydrase I, II, androgen receptor and CYP450s. 13 candidates were investigated using normal phase thin layer chromatography in two solvent systems...
October 14, 2016: Biomedical Chromatography: BMC
Susanne Paukner, Rosemarie Riedl
Pleuromutilins are antibiotics that selectively inhibit bacterial translation and are semisynthetic derivatives of the naturally occurring tricyclic diterpenoid pleuromutilin, which received its name from the pleuromutilin-producing fungus Pleurotus mutilus Tiamulin and valnemulin are two established derivatives in veterinary medicine for oral and intramuscular administration. As these early pleuromutilin drugs were developed at a time when companies focused on major antibacterial classes, such as the β-lactams, and resistance was not regarded as an issue, interest in antibiotic research including pleuromutilins was limited...
October 14, 2016: Cold Spring Harbor Perspectives in Medicine
Gianandrea Traversi, Mario Fiore, Zulema Percario, Francesca Degrassi, Renata Cozzi
Natural compounds are extensively studied for their potential use in traditional and non-traditional medicine. Several natural and synthetic Resveratrol analogues have shown interesting biological activities in the field of cancer chemoprevention. In the present study, we have focused on the ability of Resveratrol and two methoxylated derivatives (Trimethoxystilbene and Pterostilbene) to inhibit human cancer cell growth particularly analyzing their ability to interfere with tubulin dynamics at mitosis. We show that Trimethoxystilbene, differently from Resveratrol and Pterostilbene, alters microtubule polymerization dynamics in HeLa cells specifically inducing multipolar spindles and mitotic arrest coupled to a reduction of cell growth and an increase in apoptotic death by mitotic catastrophe...
October 14, 2016: Molecular Carcinogenesis
Xiaowei Xiang, Bing Shang, Xiaozheng Wang, Qinhua Chen
Yohimbine is a novel compounds for treatment of erectile dysfunction derived from natural products and pharmacokinetic study is important for its further development as a new medicine. In this work, we developed a novel PEEK tube-based solid-phase microextraction (SPME)-HPLC method for analysis of yohimbine in plasma and further for pharmacokinetic study. Poly (AA-EGDMA) was synthesized inside PEEK tube as the sorbent for microextraction of yohimbine, and parameters that could influence extraction efficiency were systematically investigated...
October 14, 2016: Biomedical Chromatography: BMC
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