keyword
MENU ▼
Read by QxMD icon Read
search

Biological agent

keyword
https://www.readbyqxmd.com/read/28550468/probing-the-contractile-vacuole-as-achilles-heel-of-the-biotrophic-grapevine-pathogen-plasmopara-viticola
#1
Viktoria Tröster, Tabea Setzer, Thomas Hirth, Anna Pecina, Andreas Kortekamp, Peter Nick
The causative agent of Grapevine Downy Mildew, the oomycete Plasmopara viticola, poses a serious threat to viticulture. In the current work, the contractile vacuole of the zoospore is analysed as potential target for novel plant protection strategies. Using a combination of electron microscopy, spinning disc confocal microscopy, and video differential interference contrast microscopy, we have followed the genesis and dynamics of this vacuole required during the search for the stomata, when the non-walled zoospore is exposed to hypotonic conditions...
May 26, 2017: Protoplasma
https://www.readbyqxmd.com/read/28550408/bacillus-pumilus-strain-yspmk11-as-plant-growth-promoter-and-bicontrol-agent-against-sclerotinia-sclerotiorum
#2
Manoj Kaushal, Ajay Kumar, Rajesh Kaushal
A study was executed in a direction to attenuate Sclerotinia stalk rot (SSR) disease through biocontrol agent and also to enhance crop productivity. Culture filtrate of bacterial strain YSPMK11 inhibited growth of Sclerotinia sclerotiorum in vitro which also exhibited higher plant growth promoting attributes. Interaction studies revealed maximum (81.50%) growth inhibition at 35 °C and pH 7.0 after 72 h incubation period with 15% culture filtrate. Based upon 16S rRNA gene sequence strain, YSPMK11 was identified as Bacillus pumilus...
June 2017: 3 Biotech
https://www.readbyqxmd.com/read/28549219/design-synthesis-and-properties-of-a-potent-inhibitor-of-pseudomonas-aeruginosa-deacetylase-lpxc
#3
Grazia Piizzi, David T Parker, Yunshan Peng, Markus Rolf Dobler, Anup Patnaik, Som Wattanasin, Eugene Liu, Francois Lenoir, Jill Nunez, John Kerrigan, David McKenney, Colin S Osborne, Donghui Yu, Leanne Lanieri, Jade Bojkovic, JoAnne Dzink-Fox, Maria-Dawn Lilly, Elizabeth R Sprague, Yipin Lu, Hongming Wang, Srijan Ranjitkar, Bing Wang, Meir Glick, Lawrence G Hamann, Ruben Tommasi, Xia Yang, Charles R Dean
Over the past several decades the frequency of antibacterial resistance in hospitals, including multi-drug resistance (MDR) and its association with serious infectious diseases, has increased at alarming rates. Pseudomonas aeruginosa is a leading cause of nosocomial infections, and resistance to virtually all approved antibacterial agents is emerging in this pathogen. To address the need for new agents to treat MDR P. aeruginosa, we focused on inhibiting the first committed step in the biosynthesis of lipid A, the deacetylation of uridyldiphospho-3-O-(R-hydroxydecanoyl)-N-acetylglucosamine by the enzyme LpxC...
May 26, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28549213/binding-of-copper-and-cisplatin-to-atox1-is-mediated-by-glutathione-through-the-formation-of-metal-sulfur-clusters
#4
Nataliya V Dolgova, Corey Yu, John P Cvitkovic, Miroslav Hodak, Kurt Nienaber, Kelly Lynn Summers, Julien Cotelesage, Jerzy Bernholc, George A Kaminski, Ingrid J Pickering, Graham N George, Oleg Y Dmitriev
Copper is an essential nutrient required for many biological processes involved in primary metabolism, but free cop-per is toxic due to its ability to catalyze formation of free radicals. To prevent toxic effects, in the cell copper is bound to proteins and low molecular weight compounds, such as glutathione, at all times. The widely used chemotherapy agent cisplatin is known to bind to copper-transporting proteins, including copper chaperone Atox1. Cisplatin interac-tions with Atox1 and other copper transporters are linked to cancer resistance to platinum-based chemotherapy...
May 26, 2017: Biochemistry
https://www.readbyqxmd.com/read/28548955/exploring-brusatol-as-a-new-anti-pancreatic-cancer-adjuvant-biological-evaluation-and-mechanistic-studies
#5
Zheng Lu, Zheng-Quan Lai, Albert W N Leung, Po Sing Leung, Zhao-Shen Li, Zhi-Xiu Lin
Pancreatic cancer is highly resistant to chemotherapeutic agents and is known to have a poor prognosis. The development of new therapeutic entities is badly needed for this deadly malignancy. In this study, we demonstrated for the first time that brusatol, a natural quassinoid isolated from a Chinese herbal medicine named Bruceae Fructus, possessed potent cytotoxic effect against different pancreatic adenocarcinoma cell lines. Its anti-pancreatic cancer effect was comparable to that of the first-line chemotherapeutic agents such as gemcitabine and 5-fluorouracil, with a more favorable safety profile...
May 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28548686/studies-on-the-antibody-response-and-side-effects-after-intramuscular-and-intraperitoneal-injection-of-atlantic-lumpfish-cyclopterus-lumpus-l-with-different-oil-based-vaccines
#6
T Erkinharju, M R Lundberg, E Isdal, I Hordvik, R A Dalmo, T Seternes
Atlantic lumpfish (Cyclopterus lumpus L.) is used as a biological delousing agent for sea lice (Lepeophtheirus salmonis K.) infestations in Norwegian aquaculture. Here, we present a study on the antibody response and vaccine side effects after intramuscular and intraperitoneal injection of lumpfish with two vaccines. Both vaccines contained bacterial antigens from atypical Aeromonas salmonicida A-layer types V and VI, Vibrio anguillarum serotype O1 and Moritella viscosa sp., but one vaccine contained a vegetable oil-based adjuvant, while the other contained a mineral oil-based adjuvant...
May 26, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28548370/current-state-of-a-dual-behavior-of-antimicrobial-peptides-therapeutic-agents-and-promising-delivery-vectors
#7
REVIEW
Urszula Piotrowska, Marcin Sobczak, Ewa Oledzka
Microorganism resistance is an important challenge in modern medicine due to the global uncontrolled use of antibiotics. Natural and synthetic antimicrobial peptides (AMPs) symbolize a new family of antibiotics, which have stimulated research and clinical interest as new therapeutic options for infections. They represent one of the most promising antimicrobial substances, due to their broad spectrum of biological activity, against bacteria, fungi, protozoa, viruses, yeast and even tumour cells. Besides, being antimicrobial, AMPs have been shown to bind and neutralize bacterial endotoxins, as well as possess immunomodulatory, anti-inflammatory, wound-healing, angiogenic and antitumour properties...
May 26, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28547827/digital-dissection-of-the-model-organism-xenopus-laevis-using-contrast-enhanced-computed-tomography
#8
Laura B Porro, Christopher T Richards
The African clawed frog, Xenopus laevis, is one of the most widely used model organisms in biological research. However, the most recent anatomical description of X. laevis was produced nearly a century ago. Compared with other anurans, pipid frogs - including X. laevis - exhibit numerous unusual morphological features; thus, anatomical descriptions of more 'typical' frogs do not detail many aspects of X. laevis skeletal and soft-tissue morphology. The relatively new method of using iodine-based agents to stain soft tissues prior to high-resolution X-ray imaging has several advantages over gross dissection, such as enabling dissection of very small and fragile specimens, and preserving the three-dimensional topology of anatomical structures...
May 26, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28547342/trichosporon-asteroides-isolated-from-cutaneous-lesions-of-a-suspected-case-of-paracoccidioidomycosis-ceti-in-a-bottlenose-dolphin-tursiops-truncatus
#9
Keiichi Ueda, Ichiro Nakamura, Eiko Nakagawa Itano, Kazunori Takemura, Yasutomo Nakazato, Ayako Sano
"Paracoccidioidomycosis ceti" is a rare zoonotic fungal infection affecting dolphins and is endemic worldwide. The causative agents are Paracoccidioides species; however, it is impossible to isolate the fungal species. We isolated Trichosporon asteroides from multifocal, irregularly raised skin lesions on a female bottlenose dolphin (Tursiops truncatus) captured off coast of Japan, which was suspected to have "paracoccidioidomycosis ceti." An abundance of round, yeast-like cells was detected in a potassium hydroxide direct-mount specimen of the skin samples; however, nested PCR targeting the partial sequence of 43-kDa glycoprotein-coding gene correspondent to Paracoccidioides sp...
May 25, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28547133/hsf1-acetylation-decreases-its-transcriptional-activity-and-enhances-glucolipotoxicity-induced-apoptosis-in-rat-and-human-beta-cells
#10
Indri Purwana, Jun J Liu, Bernard Portha, Jean Buteau
AIMS/HYPOTHESIS: Heat shock factor protein 1 (HSF1) is a transcription factor that regulates the expression of key molecular chaperones, thereby orchestrating the cellular response to stress. This system was recently implicated in the control of insulin sensitivity and is therefore being scrutinised as a novel therapeutic avenue for type 2 diabetes. However, the regulation and biological actions of HSF1 in beta cells remain elusive. Herein, we sought to investigate the regulation of HSF1 in pancreatic beta cells and to study its potential role in cell survival...
May 25, 2017: Diabetologia
https://www.readbyqxmd.com/read/28547032/car8-dorsal-root-ganglion-expression-and-genetic-regulation-of-analgesic-responses-are-associated-with-a-cis-eqtl-in-mice
#11
Roy C Levitt, Gerald Y Zhuang, Yuan Kang, Diana M Erasso, Udita Upadhyay, Mehtap Ozdemir, Eugene S Fu, Konstantinos D Sarantopoulos, Shad B Smith, William Maixner, Luda Diatchenko, Eden R Martin, Tim Wiltshire
Carbonic anhydrase-8 (Car8 mouse gene symbol) is devoid of enzymatic activity, but instead functions as an allosteric inhibitor of inositol trisphosphate receptor-1 (ITPR1) to regulate this intracellular calcium release channel important in synaptic functions and neuronal excitability. Causative mutations in ITPR1 and carbonic anhydrase-8 in mice and humans are associated with certain subtypes of spinal cerebellar ataxia (SCA). SCA mice are genetically deficient in dorsal root ganglia (DRG) Car8 expression and display mechanical and thermal hypersensitivity and susceptibility to subacute and chronic inflammatory pain behaviors...
May 25, 2017: Mammalian Genome: Official Journal of the International Mammalian Genome Society
https://www.readbyqxmd.com/read/28546917/challenges-in-the-delivery-of-therapies-to-melanoma-brain-metastases
#12
Gautham Gampa, Shruthi Vaidhyanathan, Brynna-Wilken Resman, Karen E Parrish, Svetomir N Markovic, Jann N Sarkaria, William F Elmquist
Brain metastases are a major cause of morbidity and mortality in patients with advanced melanoma. Recent approval of several molecularly-targeted agents and biologics has brought hope to patients with this previously untreatable disease. However, patients with symptomatic melanoma brain metastases have often been excluded from pivotal clinical trials. This may be in part attributed to the fact that several of the approved small molecule molecularly-targeted agents are substrates for active efflux at the blood-brain barrier, limiting their effective delivery to brain metastases...
December 2016: Current Pharmacology Reports
https://www.readbyqxmd.com/read/28546478/draft-genome-sequence-of-the-mycoparasitic-oomycete-pythium-oligandrum-strain-cbs-530-74
#13
Sandeep K Kushwaha, Ramesh R Vetukuri, Laura J Grenville-Briggs
The oomycete Pythium oligandrum is a mycoparasite and licenced biological control agent. Here, we report the draft genome sequence of P. oligandrum strain CBS 530.74, which is 36.80 Mb. It contains 341 scaffolds and 11,647 predicted protein-coding genes. As reported for plant-pathogenic Pythium species, RXLR-type effector sequences are absent.
May 25, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28545666/mahuannin-b-an-adenylate-cyclase-inhibitor-attenuates-hyperhidrosis-via-suppressing-%C3%AE-2-adrenoceptor-camp-signaling-pathway
#14
Zengyong Wang, Yu Cui, Guoyu Ding, Mengge Zhou, Xiaoyao Ma, Yuanyuan Hou, Min Jiang, Dailin Liu, Gang Bai
BACKGROUND: Based on the traditional application of traditional Chinese Medicines (TCMs), Ephedra Herba (EH) is used to cure cold fever by inducing sweating, whereas Ephedra Radix (ER) is used to treat hyperhidrosis. Although they come from the same plant, Ephedra sinica Stapf, but have play opposing roles in clinical applications. EH is known to contain ephedrine alkaloids, which is the driver of the physiological changes in sweating, heart rate and blood pressure. However, the active pharmacological ingredients (APIs) of ER and the mechanisms by which it restricts sweating remain unknown...
July 1, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28545554/whipple-s-disease-mimicking-rheumatoid-arthritis-can-cause-misdiagnosis-and-treatment-failure
#15
Cornelia Glaser, Siegbert Rieg, Thorsten Wiech, Christine Scholz, Dominique Endres, Oliver Stich, Peter Hasselblatt, Walter Geißdörfer, Christian Bogdan, Annerose Serr, Georg Häcker, Reinhard E Voll, Jens Thiel, Nils Venhoff
BACKGROUND: Whipple's disease, a rare chronic infectious disorder caused by Tropheryma whipplei, may present with predominant joint manifestations mimicking rheumatoid arthritis (RA). METHODS: A retrospective single-center cohort study of seven patients was performed. Clinical symptoms were assessed by review of medical charts and Whipple's disease was diagnosed by periodic-acid-Schiff-stain and/or Tropheryma whipplei-specific polymerase-chain-reaction. RESULTS: Median age at disease onset was 54 years, six patients were male...
May 25, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28545380/from-stem-cell-biology-to-the-treatment-of-lung-diseases
#16
Dorina Esendagli, Aysen Gunel-Ozcan
The exposure of lung to noxious agents or gasses leads to injury, which further enhances repair mechanisms by promoting the proliferation and differentiation of lung stem cells. These cells could help preserve the anatomical structure and the function of the organ. Unfortunately in many lung diseases 'this scenario' is changed and injury progresses despite repair mechanisms or conventional treatment. This review summarizes the research on lung stem cells by giving an overview to the biology, function, niches and signaling that play role in lung stem cells and further to the regeneration of the lung...
May 23, 2017: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28545374/modulators-of-the-efflux-pump-cdr1p-of-candida-albicans-mechanisms-of-action-and-chemical-features
#17
Viet-Khoa Tran-Nguyen, Rajendra Prasad, Pierre Falson, Ahcène Boumendjel
The multicomponent primary active ATP-binding cassette transporter Cdr1p in the structure of the pathogenic yeast Candida albicans is among the culprits of antifungal agent resistance reported in recent decades. So far, various potential novel inhibitors/ modulators of this protein have been purified, synthesized, and biologically tested, with results showing their ability to effectively reverse CaCdr1p-mediated drug resistance phenomenon. These compounds are of diverse origins, possess non-identical structural features and adopt different mechanisms of action...
May 22, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28545253/encapsulation-of-the-antioxidant-r-%C3%AE-lipoic-acid-in-permethylated-%C3%AE-and-%C3%AE-cyclodextrins-thermal-and-x-ray-structural-characterization-of-the-1-1-inclusion-complexes
#18
Mino R Caira, Susan A Bourne, Buntubonke Mzondo
The naturally occurring compound α-lipoic acid (ALA) is implicated in manifold critical biological roles and its potent antioxidant properties and potential for treatment of various diseases have led to its widespread use as a dietary supplement. However, shortcomings of poor aqueous solubility and low thermal stability have hampered its development as a medicinal agent, prompting the use of cyclodextrins (CDs) to address these problems. The paucity of published structural data on the nature of the interactions between ALA and CDs motivated the present study, which describes the synthesis and X-ray structural elucidation of crystalline inclusion complexes between the biologically relevant R-(+)-α-lipoic acid (RALA) and the host molecules permethylated α-CD (TMA) and permethylated β-CD (TMB)...
May 23, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28544982/an-evaluation-of-minor-groove-binders-as-anti-fungal-and-anti-mycobacterial-therapeutics
#19
Fraser J Scott, Ryan J O Nichol, Abedawn I Khalaf, Federica Giordani, Kirsten Gillingwater, Soumya Ramu, Alysha Elliott, Johannes Zuegg, Paula Duffy, Michael-Jon Rosslee, Lerato Hlaka, Santosh Kumar, Mumin Ozturk, Frank Brombacher, Michael Barrett, Reto Guler, Colin J Suckling
This study details the synthesis and biological evaluation of a collection of 19 structurally related Minor Groove Binders (MGBs), derived from the natural product distamycin, which were designed to probe antifungal and antimycobacterial activity. From this initial set, we report several MGBs that are worth more detailed investigation and optimisation. MGB-4, MGB-317 and MGB-325 have promising MIC80s of 2, 4 and 0.25 μg/mL, respectively, against the fungus C. neoformans.MGB-353 and MGB-354 have MIC99s of 3...
May 17, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28544807/effects-of-teriparatide-on-joint-erosions-in-rheumatoid-arthritis-a-randomized-controlled-trial
#20
D H Solomon, J Kay, J Duryea, B Lu, M B Bolster, R A Yood, R Han, S Ball, C Coleman, E Lo, A Wohlfahrt, M Sury, M Yin, Z Yu, A Zak, E M Gravallese
BACKGROUND: Articular erosions correlate with disability in rheumatoid arthritis (RA). Biologic treatments for RA reduce erosion progression, but erosion healing occurs infrequently. The goal of this study was to assess the effects of the anabolic agent teriparatide on joint erosion volume in RA patients treated with a tumor necrosis factor inhibitor (TNFi). METHODS: We conducted a randomized controlled trial in 24 patients with erosive RA, osteopenia, and disease activity controlled on a TNFi for at least three months...
May 23, 2017: Arthritis & Rheumatology
keyword
keyword
119375
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"