Abstract:
:Four compounds (isoquercitrin, myricetin-3-O-glucoside, catechin and gallocatechin) were isolated from lyophilized aqueous extract of Schizolobium parahyba leaves by chromatography on Sephadex LH-20, followed by semipreparative HPLC using a C-18 column, and identified by 1H and 13C NMR. The compounds were then, tested against hemorrhagic and fibrinogenolytic activities of Bothrops crude venoms and isolated metalloproteinases. The inhibitors neutralized the biological and enzymatic activities of Bothrops venoms and toxins isolated from B. jararacussu and B. neuwiedi venoms. The results showed that gallocatechin and myricetin-3-O-glucoside are good inhibitors of hemorrhagic and fibrinogenolytic activities of metalloproteinases, respectively. Gallocatechin also inhibited the myotoxic activity of both B. alternatus venom and BnSP-6 (Lys49 PhospholipaseA2 from B. neuwiedi). Circular dichroism and docking simulation studies were performed in order to investigate the possible interaction between BnSP-6 and gallocatechin. This is the first time these compounds and their anti-ophidian properties are reported for S. parahyba species. Forthcoming studies involving X-ray co-crystallization, will be of great importance for the development of new therapeutic agents for the treatment of ophidian accidents and for the better understanding of the structure/function relationship of venom toxins.
journal_name
Curr Top Med Chemjournal_title
Current topics in medicinal chemistryauthors
F Vale LH,Mendes MM,Fernandes RS,Costa TR,S Hage-Melim LI,A Sousa M,Hamaguchi A,Homsi-Brandeburgo MI,Franca SC,Silva CH,Pereira PS,Soares AM,Rodrigues VMdoi
10.2174/156802611797633438subject
Has Abstractpub_date
2011-01-01 00:00:00pages
2566-77issue
20eissn
1568-0266issn
1873-4294pii
BSP/CTMC/E-Pub/-000178-11-21journal_volume
11pub_type
杂志文章abstract::Safety and biocompatibility assessment of biomaterials are themes of constant concern as advanced materials enter the market as well as products manufactured by new techniques emerge. Within this context, this review provides an up-to-date approach on current methods for the characterization and safety assessment of b...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026618666180410151518
更新日期:2018-01-01 00:00:00
abstract::Fluorine-18 ((18)F, beta(+); 96.7%, T(1/2)=109.8 min) is of considerable importance for developing positron emission tomography (PET) ligands for imaging receptor, enzyme, gene expression etc. in brain, tumor, myocardium and other regions or organs due to its optimal decay characteristics. To synthesize (18)F-labeled ...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802607782507448
更新日期:2007-01-01 00:00:00
abstract::Following the cloning of the classical opioid receptors (mu, delta and kappa), the opioid receptor like-1 (ORL-1) was identified as a G-protein coupled receptor (GPCR) with 65% structure homology to the other members of the opioid family. Its endogenous ligand nociception/orphanin FQ (N/OFQ) was discovered shortly the...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802608786264227
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:The high sequence and structural homology among the hsp90 paralogs - Hsp90α, Hsp90β, Grp94, and Trap-1 - has made the development of paralog-specific inhibitors a challenging proposition. OBJECTIVE:This review surveys the state of developments in structural analysis, compound screening, and structure-based ...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026616666160413141154
更新日期:2016-01-01 00:00:00
abstract::In situ structural characterization of organic compounds attached to solid supports can be achieved by high-resolution magic angle spinning NMR (HRMAS NMR), a technique that provides solution-like spectra for resin-bound molecules. This review outlines the principles of the technique, the influence of the solid suppor...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802611793611913
更新日期:2011-01-01 00:00:00
abstract::One of the main goals of in silico Caco-2 cell permeability models is to identify those drug substances with high intestinal absorption in human (HIA). For more than a decade, several in silico Caco-2 models have been made, applying a wide range of modeling techniques; nevertheless, their capacity for intestinal absor...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026619666181130140350
更新日期:2018-01-01 00:00:00
abstract::Pyrimidine and purine nucleosides and their derivatives have critical functions and pharmacological applications in the brain. Nucleosides and nucleobases are precursors of nucleotides, which serve as the energy-rich currency of intermediary metabolism and as precursors of nucleic acids. Nucleosides (e.g., adenosine) ...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802611795347582
更新日期:2011-01-01 00:00:00
abstract::A modified version of the CORAL software (http://www.insilico.eu/coral) allows building up the classification model for the case of the Yes/No data on the anti-sarcoma activity of organic compounds. Three random splits into the sub-training, calibration, and test sets of the data for 3017 compounds were examined. The ...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章
doi:10.2174/1568026611212240004
更新日期:2012-01-01 00:00:00
abstract::A major neurotransmitter, L-Glutamate must be stored, transported and received, and these processes are mediated by proteins that bind this simple yet essential amino acid. Detailed evidence continues to emerge on the structure of Glu binding proteins, which includes both receptors and transporters. It appears that re...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802606777057535
更新日期:2006-01-01 00:00:00
abstract::One year after its first outbreak reported in China, coronavirus disease 2019 (COVID-19) pandemic is still sweeping the World causing serious infections and claiming more fatalities. COVID-19 is caused by the novel corona virus SARS-CoV-2, which belongs to the genus Betacoronavirus (β-CoVs) which is of greatest clinic...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章
doi:10.2174/1568026621666210119111409
更新日期:2021-01-18 00:00:00
abstract::Ischemic heart disease and cerebrovascular disease are the leading causes of death in the world. Surprisingly, these diseases are treated by relatively antiquated drugs. However, due to our improved understanding of the underlying pathology of these diseases, and a number of technological advances in tools for drug di...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026013395380
更新日期:2001-06-01 00:00:00
abstract::The genetic material in humans contains approximately 6 billion base pairs in the nuclear genome and 16,569 base pairs in the mitochondrial genome [1-3]. In some cases the difference between a healthy and a sick individual consists in only one nucleotide. Thus, it is evident that the pristine replication of the genome...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802608786141098
更新日期:2008-01-01 00:00:00
abstract::Recent advances in synthesis of functional poly-ε-caprolactone (PCL) and its self-assembly behavior, as well as application in drug delivery have been reviewed. Three strategies including end group functionalization, postpolymerization modification and new monomer preparation have been summarized to show possibilities...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026614666140118222820
更新日期:2014-01-01 00:00:00
abstract::It has been shown that the enediyne anticancer antibiotics e.g., calicheamicin, neocarzinostatin and others cleave DNA via the putative intermediate 1,4-diradical formed in the Bergmann cyclization and are thus useful for cancer chemotherapy. The pharmacological activity of these drugs is based, in general, on the act...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章
doi:10.2174/156802608783955719
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:Development of acetyl- (AChE) and butyrylcholinesterase (BuChE) inhibitors belongs to viable strategies for the treatment of dementia and other diseases related to decrease in cholinergic neurotransmission. OBJECTIVE:That is why we designed twenty-two analogues of a dual AChEBuChE salicylanilide inhibitor, ...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章
doi:10.2174/1568026620666200819154722
更新日期:2020-01-01 00:00:00
abstract::Nicotinic acid adenine dinucleotide phosphate (NAADP) is the most potent Ca²⁺ mobilizing endogenous compound known to date. Although its Ca²⁺ releasing activity has been demonstrated in many cell types and in response to different extracellular stimuli, several aspects of NAADP signaling are unclear. This overview foc...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/15680266113136660212
更新日期:2013-01-01 00:00:00
abstract::Chagas disease and African sleeping sickness are trypanosomal infections that represent important public health problems in Latin America and Africa, respectively. The restriction of these diseases to the poorer parts of the world has meant that they have been largely neglected and limited progress has been made in th...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802611796575894
更新日期:2011-01-01 00:00:00
abstract::Structure-activity relationships of a 4-aminoquinoline MCH-1R antagonist lead series were explored by synthesis of analogs with modifications at the 2-, 4- and 6-positions of the original HTS hit. Improvements to the original screening lead were made by addition of lipophilic groups at the 2-position and biphenyl, cyc...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802607782194789
更新日期:2007-01-01 00:00:00
abstract::Alzheimer's disease (AD) is an irreversible multifaceted neurodegenerative disorder that gradually degrades neuronal cells. Presently, it is the most common reason for the memory loss and dementia in older individuals. It is patho-physiologically described by extracellular amyloid beta (Aβ) deposition, intracellular n...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026617666170103163715
更新日期:2017-01-01 00:00:00
abstract::In medical oncology, targeted therapy has emerged over the last decade, as the most promising strategy to fight cancer. In addition, a more complete understanding of tumor heterogeneity and pharmacology of the more conventional anti-cancer agents has led to development of metronomic chemotherapy (MC) (i.e. a more freq...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
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更新日期:2012-01-01 00:00:00
abstract::RNA interference (RNAi) is an attractive phenomenon for practical use that specifically inhibits gene expression and is carried out by small double-stranded RNAs (dsRNAs) including small interfering RNA (siRNA) or short hairpin RNA (shRNA). In addition, RNAi is of great interest for clinical use to cure refractory dis...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802609789630857
更新日期:2009-01-01 00:00:00
abstract::Two general aspects which need to be considered for the successful application of dendrimers for biomedical purposes are their availability at an acceptable cost and their suitability as regards their pharmacodynamic and pharmacokinetic properties. These two aspects are covered in this review. In the first part, synth...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/156802608785849012
更新日期:2008-01-01 00:00:00
abstract::Psychiatric diagnosis has long been perceived as more of an art than a science since its foundations lie within the observation, and the self-report of the patients themselves and objective diagnostic biomarkers are lacking. Furthermore, the diagnostic tools in use not only stray away from the conventional medical fra...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026620666200131095328
更新日期:2020-01-01 00:00:00
abstract::Bacterial infections constitute an always growing health problem worldwide. The resistance to antibiotics of an increasing number of bacterial pathogens necessitates a permanent search for new molecules with different mechanisms of action. Histidine biosynthesis is an ancient pathway found in bacteria, archaebacteria,...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026616666160413140000
更新日期:2016-01-01 00:00:00
abstract:AIMS:A series of 8-methoxy ciprofloxacin- hydrazone/acylhydrazone hybrids were evaluated for their activity against a panel of cancer cell lines including HepG2 liver cancer cells, MCF-7, doxorubicin- resistant MCF-7 (MCF-7/DOX) breast cancer cells, DU-145 and multidrug-resistant DU145 (MDR DU-145) prostate cancer cell...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章
doi:10.2174/1568026620666200603105644
更新日期:2020-01-01 00:00:00
abstract::The human tuberculosis (TB) is primarily caused by Mycobacterium tuberculosis (Mtb) that inhabits inside and amidst immune cells of the host with adapted physiology to regulate interdependent cellular functions with intact pathogenic potential. The complexity of this disease is attributed to various factors such as th...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章
doi:10.2174/1568026621999201211200447
更新日期:2020-12-11 00:00:00
abstract::Artemisinin is isolated from Artemisia annua L. with peroxide-containing sesquiterpene lactone structure. Because of its unique structural characteristics and promising anticancer, antivirus activities, it has recently received increasing attention. The aim of this review is to summarize recent discoveries of artemisi...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026619666190122144217
更新日期:2019-01-01 00:00:00
abstract::Tanshinones are a class of bioactive compounds present in the Chinese herbal medicine Danshen (Salvia miltiorrhiza Bunge), containing among others, abietane diterpene quinone scaffolds. Chemical synthesis and biological activity studies of natural and unnatural tanshinone derivatives have been reviewed in this article...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章
doi:10.2174/1568026620666200922115109
更新日期:2020-01-01 00:00:00
abstract::Penile erection is a complex physiologic event resulting from the interactions of the nervous system on a highly specialized vascular organ. Activation of central nervous system melanocortinergic (MC) receptors with either endogenous or synthetic melanotropic ligands may initiate and/or facilitate spontaneous penile e...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章
doi:
更新日期:2007-01-01 00:00:00
abstract::Histone deacetylases (HDACs) have recently emerged as key elements in epigenetic control of gene expression. Due to the implication of HDACs in a variety of diseases ranging from cancer to neurodegenerative disorder, HDAC inhibitors have received increased attention in recent years. Over the last few decades, a myriad...
journal_title:Current topics in medicinal chemistry
pub_type: 杂志文章,评审
doi:10.2174/1568026615666141208105614
更新日期:2015-01-01 00:00:00