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https://www.readbyqxmd.com/read/27915048/protective-effects-of-green-tea-and-its-main-constituents-against-natural-and-chemical-toxins-a-comprehensive-review
#1
REVIEW
Maryam Rameshrad, Bibi Marjan Razavi, Hossein Hosseinzadeh
Toxins are natural or chemical poisonous substances with severe side effects on health. Humans are generally exposed by widespread toxic contaminations via air, soil, water, food, fruits and vegetables. Determining a critical antidote agent with extensive effects on different toxins is an ultimate goal for all toxicologists. Traditional medicine is currently perceived as a safe and natural approach against toxins. In this regard, we focused on the protective effects of green tea (Camellia sinensis) and its main components such as catechin, epicatechin, epicatechin gallate, gallocatechin, epigallocatechin and epigallocatechin gallate as a principal source of antioxidants against both natural and chemical toxins...
November 30, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27913876/atherosclerosis-assessment-and-rheumatoid-arthritis
#2
C Bes, S Gürel, G Buğdaycı, O Dikbaş, M Soy
BACKGROUND AND AIM: Rheumatoid arthritis is associated with increased morbidity and mortality due to atherosclerotic cardiovascular diseases. Lipoprotein-associated phospholipase A2 (Lp-PLA2) is an enzyme of phospholipase A2; it plays an important role in inflammation and atherosclerosis. Herein we aimed to investigate whether Lp-PLA2 activity is associated with atherosclerosis in patients with rheumatoid arthritis and compare the Lp-PLA2 activity with carotid intima media thickness (CIMT)...
December 2, 2016: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/27911900/clinical-and-pharmacological-investigation-of-myotoxicity-in-sri-lankan-russell-s-viper-daboia-russelii-envenoming
#3
Anjana Silva, Christopher Johnston, Sanjaya Kuruppu, Daniela Kneisz, Kalana Maduwage, Oded Kleifeld, A Ian Smith, Sisira Siribaddana, Nicholas A Buckley, Wayne C Hodgson, Geoffrey K Isbister
BACKGROUND: Sri Lankan Russell's viper (Daboia russelii) envenoming is reported to cause myotoxicity and neurotoxicity, which are different to the effects of envenoming by most other populations of Russell's vipers. This study aimed to investigate evidence of myotoxicity in Russell's viper envenoming, response to antivenom and the toxins responsible for myotoxicity. METHODOLOGY AND FINDINGS: Clinical features of myotoxicity were assessed in authenticated Russell's viper bite patients admitted to a Sri Lankan teaching hospital...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27905470/a-previously-unreported-impact-of-a-pla2g7-gene-polymorphism-on-the-plasma-levels-of-lipoprotein-associated-phospholipase-a2-activity-and-mass
#4
Yue Qi, Dong Zhao, Zhangrong Jia, Wei Wang, Miao Wang, Jiayi Sun, Jun Liu, Yan Li, Wuxiang Xie, Jing Liu
Lipoprotein-associated phospholipase A2 (Lp-PLA2) levels are associated with the development of atherosclerosis. We aimed to assess the genetic determinants of Lp-PLA2 activity and mass by genotyping multiple polymorphisms in PLA2G7, the gene encoding Lp-PLA2, among 1258 participants from the Chinese Multi-provincial Cohort Study-Beijing Project. The Sequenom MassARRAY system, Taqman assay and direct sequencing were adopted. For the first time, the rs13218408 polymorphism was found to be significantly associated with reduced Lp-PLA2 levels...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27904556/the-effect-of-%C3%AF-fatty-acids-on-the-expression-of-phospholipase-a2-group-2a-in-human-gastric-cancer-patients
#5
Mahboube Shariati, Mahmoud Aghaei, Ahmad Movahedian, Mohammad Hosein Somi, Homayun Dolatkhah, Ahmad Mirza Aghazade
BACKGROUND: Studies show that polyunsaturated fatty acids (PUFAs) may have an inhibitory role in carcinogenesis. It was previously shown that PLA2 group 2A (PLA2G2A) messenger RNA (mRNA) expression is associated with less frequent metastasis and longer survival in gastric adenocarcinoma. This study intends to investigate the effect of PUFAs on the expression of PLA2G2A in patients with gastric cancer. MATERIALS AND METHODS: Thirty-four patients with gastric cancer (GC) were randomly divided into two groups...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27904505/composition-and-biological-activities-of-the-aqueous-extracts-of-three-scleractinian-corals-from-the-mexican-caribbean-pseudodiploria-strigosa-porites-astreoides-and-siderastrea-siderea
#6
Alejandro García-Arredondo, Alejandra Rojas-Molina, César Ibarra-Alvarado, Fernando Lazcano-Pérez, Roberto Arreguín-Espinosa, Judith Sánchez-Rodríguez
BACKGROUND: Scleractinian corals (stony corals) are the most abundant reef-forming cnidarians found in coral reefs throughout the world. Despite their abundance and ecological importance, information about the diversity of their toxins and their biological activities is very scarce. In this study, the chemical composition and the biological activities of the aqueous extracts of Pseudodiploria strigosa, Porites astreoides and Siderastrea siderea, three scleractinian corals from the Mexican Caribbean, have been assessed for the first time...
2016: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/27894953/biological-variability-of-lipoprotein-associated-phospholipase-a2activity-in-healthy-individuals
#7
Leslie J Donato, Jeffrey W Meeusen, Sarah M Jenkins, Stacy J Hartman, Amy K Saenger, Nikola A Baumann, Darci R Block, Allan S Jaffe
OBJECTIVES: Measuring lipoprotein-associated phospholipase A2 (Lp-PLA2) activity can aid in identifying individuals at higher risk of coronary heart disease. However, the biological variation of Lp-PLA2 activity and corresponding reference change value (RCV) is unknown which limits interpretation of results. In this study we aim to define the intra- and inter-individual variability of Lp-PLA2 activity in a healthy reference population. METHODS: A total of 24 healthy individuals (22-47years of age) were prospectively collected at several time points: daily for five days (after overnight fast), daily for three days (while non-fasting), weekly for four weeks (after overnight fast), and monthly for 6months (after overnight fast)...
November 25, 2016: Clinical Biochemistry
https://www.readbyqxmd.com/read/27890774/inhibition-of-local-effects-induced-by-bothrops-erythromelas-snake-venom-assessment-of-the-effectiveness-of-brazilian-polyvalent-bothropic-antivenom-and-aqueous-leaf-extract-of-jatropha-gossypiifolia
#8
Juliana Félix-Silva, Jacyra A S Gomes, Jacinthia B Xavier-Santos, Júlia G R Passos, Arnóbio A Silva-Junior, Denise V Tambourgi, Matheus F Fernandes-Pedrosa
Bothrops erythromelas is a snake of medical importance responsible for most of the venomous incidents in Northeastern Brazil. However, this species is not included in the pool of venoms that are used in the Brazilian polyvalent bothropic antivenom (BAv) production. Furthermore, it is well known that antivenom therapy has limited efficacy against venom-induced local effects, making the search for complementary alternatives to treat snakebites an important task. Jatropha gossypiifolia is a medicinal plant widely indicated in folk medicine as an antidote for snakebites, whose effectiveness against Bothrops jararaca venom (BjV) has been previously demonstrated in mice...
November 25, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27888461/inhibitory-effects-of-bee-venom-and-its-components-against-viruses-in-vitro-and-in-vivo
#9
Md Bashir Uddin, Byeong-Hoon Lee, Chamilani Nikapitiya, Jae-Hoon Kim, Tae-Hwan Kim, Hyun-Cheol Lee, Choul Goo Kim, Jong-Soo Lee, Chul-Joong Kim
Bee venom (BV) from honey bee (Apis Melifera L.) contains at least 18 pharmacologically active components including melittin (MLT), phospholipase A2 (PLA2), and apamin etc. BV is safe for human treatments dose dependently and proven to possess different healing properties including antibacterial and antiparasitidal properties. Nevertheless, antiviral properties of BV have not well investigated. Hence, we identified the potential antiviral properties of BV and its component against a broad panel of viruses. Co-incubation of non-cytotoxic amounts of BV and MLT, the main component of BV, significantly inhibited the replication of enveloped viruses such as Influenza A virus (PR8), Vesicular Stomatitis Virus (VSV), Respiratory Syncytial Virus (RSV), and Herpes Simplex Virus (HSV)...
December 2016: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/27882139/the-association-between-the-levels-of-crp-il-10-pla2-fbg-and-prognosis-in-traumatic-fracture-of-lower-limb
#10
Jing Jiao, Jun-Wen Wang, Fei Xiao, Yu-Cheng Huang
The aim of the present study was to examine changes of sera levels of C-reactive protein (CRP), interleukin-10 (IL-10), phospholipase A2 (PLA2) and fibrinogen β polypeptide chain gene (Fbg) in patients with traumatic fracture of lower limb, and to evaluate their association with prognosis. The changes in sera levels of CRP, IL-10, PLA2 and Fbg were observed at the time of injury, 24 h, and 5 and 7 days after surgery in 90 patients with traumatic fracture of lower limb. In addition, 50 cases, who presented for health examination, were included as the normal controls...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27881128/effect-of-intensive-insulin-treatment-on-plasma-levels-of-lipoprotein-associated-phospholipase-a2-and-secretory-phospholipase-a2-in-patients-with-newly-diagnosed-type-2-diabetes
#11
Xiu-Hong Lin, Ming-Tong Xu, Jv-Ying Tang, Li-Fang Mai, Xiao-Yi Wang, Meng Ren, Li Yan
BACKGROUND: China has the highest absolute disease burden of diabetes worldwide. For diabetic patients, diabetes-related vascular complications are major causes of morbidity and mortality. The roles of lipoprotein-associated phospholipase A2 (Lp-PLA2) and secretory phospholipase A2 (sPLA2) as inflammatory markers have been recently evaluated in the pathogenesis of both diabetes and atherosclerosis. We aimed to determine the mechanism through which patients with newly diagnosed type 2 diabetes gain long-term vascular benefit from intensive insulin therapy by evaluating the change in Lp-PLA2 and sPLA2 levels after early intensive insulin treatment and its relevance with insulin resistance and pancreatic β-cell function...
November 23, 2016: Lipids in Health and Disease
https://www.readbyqxmd.com/read/27878455/structural-insight-into-binding-mode-of-9-hydroxy-aristolochic-acid-diclofenac-and-indomethacin-to-pla2
#12
Mohsen Ebrahimi, Omidreza Firuzi, Ramin Miri, Nima Razzaghi-Asl, Ahmad Ebadi
Phospholipase A2 (PLA2) catalyzes the hydrolysis of phospholipids into arachidonic acid and lysophospholipids. Arachidonic acid is modified by cyclooxygenases into active compounds called eicosanoids that act as signaling molecules in a number of physiological processes. Excessive production of eicosanoids leads to several pathological conditions such as inflammation. In order to block the inflammatory effect of these compounds, upstream enzymes such as PLA2 are valid targets. In the present contribution, molecular dynamic analysis was performed to evaluate the binding of diclofenac, 9-hydroxy aristolochic acid (9-HAA) and indomethacin to PLA2...
November 22, 2016: Interdisciplinary Sciences, Computational Life Sciences
https://www.readbyqxmd.com/read/27871839/interactions-of-two-structurally-related-anionic-phospholipids-cardiolipin-and-phosphatidylglycerol-with-phospholipase-a2-langmuir-monolayer-studies
#13
Marcin Broniatowski, Monika Urbaś
Anionic phospholipids cardiolipins (CL) and phosphatidylglycerols (PG) dominate in the biomembranes of the majority of soil bacteria. CL to PG ratio differs between the species and is also dependent on the external conditions. CL/PG ratio is different in polluted than in unspoiled soils and it was hypothesized that it is connected with the activity of the membranelytic enzymes from the phospholipase A2 class (PLA2) as it was proved that persistent soil pollutants can activate PLA2. In our studies we applied the Langmuir monolayer technique and Brewster angle microscopy to elucidate the mechanism of the interactions of PLA2 with the model membranes formed by anionic phospholipids...
November 18, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27865984/fabrication-of-liposomal-doxorubicin-exhibiting-ultrasensitivity-against-phospholipase-a2-for-efficient-pulmonary-drug-delivery-to-lung-cancers
#14
Tatsuaki Tagami, Yuta Ando, Tetsuya Ozeki
Phospholipase A2 (PLA2) is expressed in inflammation-related tissue, including cancer tumors. We report that a hybrid liposome composed of phospholipid (DPPC) and PEGylated block-copolymer (Poloxamer 188) can rapidly release an encapsulated hydrophilic drug in the presence of PLA2. DPPC/P188 liposomes released approximately 80% of the encapsulated calcein (a fluorescence marker) within 10min in the presence of 120 mU of PLA2 at 37°C in vitro, whereas several other liposomal compositions used for inhalation therapy did not...
November 16, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27833915/exposure-to-p-p-dde-induces-morphological-changes-and-activation-of-the-pkc%C3%AE-p38-c-ebp%C3%AE-pathway-in-human-promyelocytic-hl-60-cells
#15
Nallely A Torres-Avilés, Damaris Albores-García, Ana L Luna, Monica Moreno-Galván, Mariana Salgado-Bustamante, Diana Patricia Portales-Pérez, Emma S Calderón-Aranda
Dichlorodiphenyldichloroethylene (p,p'-DDE), the most persistent metabolite of dichlorodiphenyltrichloroethane (DDT), is still present in the human population. Both are present in the bone marrow of patients with bone marrow disorders, but thus far there are no studies that assess the capability of p,p'-DDE to affect myeloid cells. The aim of this study was to determine the effect of p,p'-DDE on promyelocytic cell differentiation and intracellular pathways related to this event. p,p'-DDE induced morphological changes compatible with promyelocytic differentiation in a concentration-dependent manner...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27833128/qishen-granules-inhibit-myocardial-inflammation-injury-through-regulating-arachidonic-acid-metabolism
#16
Chun Li, Jing Wang, Qiyan Wang, Yi Zhang, Na Zhang, Linghui Lu, Yan Wu, Qian Zhang, Wei Wang, Yong Wang, Pengfei Tu
Qishen granules (QSG), a traditional Chinese medicine, have been prescribed widely in the treatment of coronary heart diseases. Previous studies demonstrated that QSG had anti-inflammatory and cardio-protective effects in mice with acute myocardial infarction (AMI). However, the mechanisms by which QSG attenuate inflammation and prevent post-AMI heart failure (HF) are still unclear. In this study, we explored the anti-inflammatory mechanisms of QSG by in vitro and in vivo experiments. A novel inflammatory injury model of H9C2 cells was induced by lipopolysaccharide (LPS)-stimulated macrophage-conditioned media (CM)...
November 11, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27826020/biochemical-and-kinetic-evaluation-of-the-enzymatic-toxins-from-two-stinging-scyphozoans-nemopilema-nomurai-and-cyanea-nozakii
#17
Yang Yue, Huahua Yu, Rongfeng Li, Ronge Xing, Song Liu, Kecheng Li, Xueqin Wang, Xiaolin Chen, Pengcheng Li
Jellyfish envenomations are emerging as an important public health concern occurred worldwide. In China, the situation is getting worse with numerous people stung by jellyfish Nemopilema nomurai (N. nomurai) and Cyanea nozakii (C. nozakii) in the summer. However, the proteinaceous mixtures in nematocysts responsible for the symptoms of jellyfish stings were scarcely characterized and understood in view of enzymatic constituents and toxicity. In the present study, enzymatic properties of jellyfish N. nomurai and C...
November 4, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27823559/biological-and-chemical-aspects-of-natural-biflavonoids-from-plants-a-brief-review
#18
Vanessa Silva Gontijo, Marcelo Henrique Dos Santos, Claudio Viegas
Biflavonoids belong to a subclass of the plant flavonoids family and are limited to several species in the plant kingdom. In the literature, biflavonoids are extensively reported for their pharmacological properties including anti-inflammatory, antioxidant, inhibitory activity against phospholipase A2 (PLA2) and antiprotozoal activity. These activities have been discovered from the small number of biflavonoid structures that have been investigated, although the natural biflavonoids library is likely to be large...
November 4, 2016: Mini Reviews in Medicinal Chemistry
https://www.readbyqxmd.com/read/27818473/plasma-lipoprotein-associated-phospholipase-a2-level-is-an-independent-predictor-of-high-thrombus-burden-in-patients-with-acute-st-segment-elevation-myocardial-infarction
#19
Xiangqi Wu, Yingqiang Zhang, Zhiming Wu, Wei You, Fengshuo Liang, Fei Ye, Shaoliang Chen
Lipoprotein-associated phospholipase A2 (Lp-PLA2) is an independent risk factor for plaque rupture and atherothrombotic events. However, the associations between serum Lp-PLA2 level and thrombus burden in ST-segment elevation myocardial infarction (STEMI) patients remain unknown.We consecutively enrolled 351 STEMI patients who underwent primary percutaneous coronary intervention (pPCI). Patients were assigned to a high thrombus burden (HTB) group (n = 230) and a low thrombus burden (LTB) group (n = 121). Baseline data were recorded during hospital admission...
November 4, 2016: International Heart Journal
https://www.readbyqxmd.com/read/27792942/cadmium-exposure-is-associated-with-soluble-urokinase-plasminogen-activator-receptor-a-circulating-marker-of-inflammation-and-future-cardiovascular-disease
#20
Björn Fagerberg, Yan Borné, Lars Barregard, Gerd Sallsten, Niklas Forsgard, Bo Hedblad, Margaretha Persson, Gunnar Engström
BACKGROUND: Diet and smoking are the main sources of cadmium exposure in the general population. Cadmium increases the risk of cardiovascular diseases, and experimental studies show that it induces inflammation. Blood cadmium levels are associated with macrophages in human atherosclerotic plaques. Soluble urokinase-type plasminogen activator receptor (suPAR) is an emerging biomarker for cardiovascular events related to inflammation and atherosclerotic plaques. The aim was to examine whether blood cadmium levels are associated with circulating suPAR and other markers of inflammation...
January 2017: Environmental Research
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