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phosphatidylserine

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https://www.readbyqxmd.com/read/28632113/paracandidimonas-soli-gen-nov-sp-nov-isolated-from-soil
#1
Peter Kämpfer, Hans-Jürgen Busse, John A McInroy, Stefanie P Glaeser
A slightly yellow-pigmented, Gram-stain-negative, rod-shaped bacterium, strain IMT-305T, was isolated from soil in Alabama, USA. Phylogenetic analysis based on the nearly full-length 16S rRNA gene sequence placed the strain in between the genera Pusillimonas, Parapusillimonas and Candidimonas with highest 16S rRNA gene sequence similarity to the type strain of Parapusillimonas granuli (97.5 %) and Candidimonas nitroreducens (97.4 %). The genomic G+C content of strain IMT-305T was 63.9 mol%. The main cellular fatty acids were C18:1ω7c, C17:0 cyclo, C16:0 and C16:1ω7c/iso-C15:0 2-OH (detected as summed feature 3)...
June 20, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28631038/the-significance-of-timd4-expression-in-clear-cell-renal-cell-carcinoma
#2
Hiromu Yano, Takanobu Motoshima, Chaoya Ma, Cheng Pan, Sohsuke Yamada, Toshiyuki Nakayama, Shohei Kitada, Naohiro Fujimoto, Tomomi Kamba, Motohiro Takeya, Yoshihiro Komohara
T-cell immunoglobulin and mucin domain (TIMD) family genes are related to innate immune responses. TIMD4 is a receptor for phosphatidylserine and is involved in the phagocytosis of apoptotic cells by macrophages. In the present study, we found that TIMD4 is expressed on the cancer cells of patients with clear cell renal cell carcinoma (ccRCC). TIMD4 was immunostained in the resected samples of 89 patients diagnosed as ccRCC. High expression of TIMD4 in cancer cells was closely related to short progression free survival time; however, it was not correlated with other clinicopathological factors...
June 19, 2017: Medical Molecular Morphology
https://www.readbyqxmd.com/read/28630259/triacylglycerol-mimetics-regulate-membrane-interactions-of-glycogen-branching-enzyme-implications-for-therapy
#3
Rafael Alvarez, Jesús Casas, David J López, Maitane Ibarguren, Ariadna Suari-Rivera, Silvia Terés, Francisca Guardiola-Serrano, Alexander Lossos, Xavier Busquets, Or Kakhlon, Pablo V Escribá
Adult Polyglucosan Body Disease (APBD) is a neurological disorder characterized by adult-onset neurogenic bladder, spasticity, weakness, and sensory loss. The disease is caused by aberrant glycogen branching enzyme (GBE1-Y329S) yielding less branched, globular and soluble glycogen which tends to aggregate. We explore here whether, despite being a soluble enzyme, GBE1 activity is regulated by protein-membrane interactions. Since soluble proteins can contact a wide variety of cell membranes, we investigated the interactions of purified wild-type and Y329S GBE1 proteins with different types of model membranes (liposomes)...
June 19, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28629940/highly-informative-multiclass-profiling-of-lipids-by-ultra-high-performance-liquid-chromatography-low-resolution-quadrupole-mass-spectrometry-by-using-electrospray-ionization-and-atmospheric-pressure-chemical-ionization-interfaces
#4
Marco Beccaria, Veronica Inferrera, Francesca Rigano, Krzysztof Gorynski, Giorgia Purcaro, Janusz Pawliszyn, Paola Dugo, Luigi Mondello
A simple, fast, and versatile method, using an ultra-high performance liquid chromatography system coupled with a low resolution (single quadrupole) mass spectrometer was optimized to perform multiclass lipid profiling of human plasma. Particular attention was made to develop a method suitable for both electrospray ionization and atmospheric pressure chemical ionization interfaces (sequentially in positive- and negative-ion mode), without any modification of the chromatographic conditions (mobile phase, flow-rate, gradient, etc...
June 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28627468/a-novel-chalcone-derivative-lqfm064-induces-breast-cancer-cells-death-via-p53-p21-kit-and-pdgfra
#5
Bruna Lannuce Silva Cabral, Artur Christian Garcia da Silva, Renato Ivan de Ávila, Alane Pereira Cortez, Rangel Magalhães Luzin, Luciano Morais Lião, Eric de Souza Gil, Gérman Sanz, Boniek G Vaz, José R Sabino, Ricardo Menegatti, Marize Campos Valadares
This study shows the design, synthesis and antitumoral potential evaluation of a novel chalcone-like compound, (E)-3- (3, 5-di-ter-butyl-4-hydroxyphenyl)-1- (4-hydroxy-3-methoxyphenyl) prop-2-en-1-one [LQFM064) (4)], against human breast adenocarcinoma MCF7 cells. Some toxicological parameters were also investigated. LQFM064) (4) exhibited cytotoxic activity against MCF7 cells (IC50=21μM), in a concentration dependent-manner, and triggered significant changes in cell morphology and biochemical/molecular parameters, which are suggestive of an apoptosis inductor...
June 13, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28626369/biophysical-and-biochemical-markers-of-red-blood-cell-fragility
#6
Ariel Orbach, Orly Zelig, Saul Yedgar, Gregory Barshtein
BACKGROUND: Red blood cells (RBCs) undergo a natural aging process occurring in the blood circulation throughout the RBC lifespan or during routine cold storage in the blood bank. The aging of RBCs is associated with the elevation of mechanical fragility (MF) or osmotic fragility (OF) of RBCs, which can lead to cell lysis. The present study was undertaken to identify RBC properties that characterize their susceptibility to destruction under osmotic/mechanical stress. METHODS: RBCs were isolated from freshly donated blood or units of packed RBCs (PRBCs) and suspended in albumin-supplemented phosphate-buffered saline (PBS)...
June 2017: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/28624437/the-plasma-membrane-penultimate-regulator-of-adam-sheddase-function
#7
REVIEW
Karina Reiss, Sucharit Bhakdi
BACKGROUND: ADAM10 and ADAM17 are the best characterized members of the ADAM (A Disintegrin and Metalloproteinase) - family of transmembrane proteases. Both are involved diverse physiological and pathophysiological processes. ADAMs are known to be regulated by posttranslational mechanisms. However, emerging evidence indicates that the plasma membrane with its unique dynamic properties may additionally play an important role in controlling sheddase function. SCOPE OF REVIEW: Membrane events that could contribute to regulation of ADAM-function are summarized...
June 14, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28622976/differential-binding-of-the-hiv-1-envelope-to-phosphatidylserine-receptors
#8
Linlin Gu, Brian Sims, Alexandre Krendelchtchikov, Edlue Tabengwa, Qiana L Matthews
Prior work has shown that the HIV-1 envelope of the human immunodeficiency virus (HIV) interact directly with T-cell immunoglobulin mucin (TIM) family proteins. Herein, we demonstrate that HIV-1 envelope glycoproteins from varying HIV-1 clades bind differentially to TIM proteins and functionally similar proteins acting as phosphatidylserine (PtdSer) receptors. Using enzyme-linked immunosorbent assay (ELISA) and surface plasmon resonance (SPR) technology, we show that lysate containing HIV-1 envelope and recombinant HIV-1 envelope glycoproteins bind TIM-4 and advanced glycosylation end product-specific receptor (AGER)...
June 13, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28619996/farnesoid-x-receptor-and-liver-x-receptor-ligands-initiate-formation-of-coated-platelets
#9
Amanda J Unsworth, Alexander P Bye, Dionne S Tannetta, Michael J R Desborough, Neline Kriek, Tanya Sage, Harriet E Allan, Marilena Crescente, Parveen Yaqoob, Timothy D Warner, Chris I Jones, Jonathan M Gibbins
OBJECTIVES: The liver X receptors (LXRs) and farnesoid X receptor (FXR) have been identified in human platelets. Ligands of these receptors have been shown to have nongenomic inhibitory effects on platelet activation by platelet agonists. This, however, seems contradictory with the platelet hyper-reactivity that is associated with several pathological conditions that are associated with increased circulating levels of molecules that are LXR and FXR ligands, such as hyperlipidemia, type 2 diabetes mellitus, and obesity...
June 15, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28618649/cafestol-a-diterpene-molecule-found-in-coffee-induces-leukemia-cell-death
#10
Cauê S Lima, Daniel G Spindola, Alexandre Bechara, Daniel M Garcia, Caroline Palmeira-Dos-Santos, Janaina Peixoto-da-Silva, Adolfo G Erustes, Luis F G Michelin, Gustavo J S Pereira, Soraya S Smaili, Edgar Paredes-Gamero, Andrana K Calgarotto, Carlos R Oliveira, Claudia Bincoletto
To evaluate the antitumor properties of Cafestol four leukemia cell lines were used (NB4, K562, HL60 and KG1). Cafestol exhibited the highest cytotoxicity against HL60 and KG1 cells, as evidenced by the accumulation of cells in the sub-G1 fraction, mitochondrial membrane potential reduction, accumulation of cleaved caspase-3 and phosphatidylserine externalization. An increase in CD11b and CD15 differentiation markers with attenuated ROS generation was also observed in Cafestol-treated HL60 cells. These results were similar to those obtained following exposure of the same cell line to cytarabine (Ara-C), an antileukemic drug...
June 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28613115/contribution-of-phosphatidylserine-to-rho1-and-pkc1-related-repolarization-of-the-actin-cytoskeleton-under-stressed-conditions-in-saccharomyces-cerevisiae
#11
Wataru Nomura, Yoshiharu Inoue
The budding yeast Saccharomyces cerevisiae undergoes polarized cell growth, which is established in association with actin polarization. Rho1, one of the Rho-type GTPases in S. cerevisiae, is crucial for maintaining polarized cell growth and actin polarization and controlling the downstream signaling pathway, the Pkc1-Mpk1 MAP kinase cascade, through a physical interaction with Pkc1, the sole protein kinase C in this yeast. The Pkc1-Mpk1 MAP kinase cascade is important for the repolarization of actin under heat shock-stressed conditions...
June 14, 2017: Small GTPases
https://www.readbyqxmd.com/read/28610775/cytotoxic-effect-of-a-novel-naphthylchalcone-against-multiple-cancer-cells-focusing-on-hematologic-malignancies
#12
Mariana Franzoni Maioral, Camila do Nascimento Bodack, Natália Marceli Stefanes, Álisson Bigolin, Alessandra Mascarello, Louise Domeneghini Chiaradia-Delatorre, Rosendo Augusto Yunes, Ricardo José Nunes, Maria Cláudia Santos-Silva
Chalcones are natural compounds described in the literature by its several properties including cytotoxic activity against several tumor types. Considering that the search for new chemotherapeutic agents is still necessary, the aim of this study was to investigate the cytotoxic mechanisms involved in cell death induced by a synthetic chalcone (A23) on different tumor cells. Chalcone A23 reduced the cell viability of twelve tumor cell lines in a concentration and time dependent manner and it was more cytotoxic against acute leukemia cells...
June 10, 2017: Biochimie
https://www.readbyqxmd.com/read/28608817/recombinant-phospholipase-d-from-loxosceles-gaucho-binds-to-platelets-and-promotes-phosphatidylserine-exposure
#13
Daniel A Fukuda, Maria C Caporrino, Katia C Barbaro, Maisa S Della-Casa, Eliana L Faquim-Mauro, Geraldo S Magalhaes
Spider envenomation, from the genus Loxosceles, is frequently reported as a cause of necrotic lesions in humans around the world. Among the many components found in the venom of Loxosceles genus, phospholipases D (PLDs) are the most investigated, since they can cause a massive inflammatory response, dermonecrosis, hemolysis and platelet aggregation, among other effects. Even though the PLDs induce strong platelet aggregation, there are no studies showing how the PLDs interact with platelets to promote this effect...
June 13, 2017: Toxins
https://www.readbyqxmd.com/read/28607800/effect-of-a-traditional-chinese-herbal-medicine-formulation-on-cell-survival-and-apoptosis-of-mpp-treated-mes-23-5-dopaminergic-cells
#14
Shuifen Ye, Ho Kee Koon, Wen Fan, Yihui Xu, Wei Wei, Chuanshan Xu, Jing Cai
Progressive degeneration of dopaminergic neurons in the substantia nigra (SN) is implicated in Parkinson's disease (PD). The efficacy of these currently used drugs is limited while traditional Chinese medicine (TCM) has been used in the management of neurodegenerative diseases for many years. This study was designed to evaluate the effect of a modified traditional Chinese herbal medicine decoction, Cong Rong Jing (CRJ), on cell survival and apoptosis of 1-methyl-4-phenylpyridinium- (MPP(+)-) treated MES23.5 dopaminergic cells...
2017: Parkinson's Disease
https://www.readbyqxmd.com/read/28607507/urinary-lipidomics-evidence-for-multiple-sources-and-sexual-dimorphism-in-healthy-individuals
#15
J Graessler, C S Mehnert, K-M Schulte, S Bergmann, S Strauss, T D Bornstein, J Licinio, M-L Wong, A L Birkenfeld, S R Bornstein
Urinary lipidomics may add new valuable biomarkers to the diagnostic armamentarium for early detection of metabolic and kidney diseases. Sources and composition of urinary lipids in healthy individuals, however, have not been investigated in detail. Shotgun lipidomics was used to quantify lipidomic profiles in native urine samples from 16 individuals (eight men, eight women) collected in five fractions over 24 h. All probands were comprehensively characterized by urinary and clinical indices. The mean total urinary lipid concentration per sample was 0...
June 13, 2017: Pharmacogenomics Journal
https://www.readbyqxmd.com/read/28606933/multitiered-and-cooperative-surveillance-of-mitochondrial-phosphatidylserine-decarboxylase-1
#16
Oluwaseun B Ogunbona, Ouma Onguka, Elizabeth Calzada, Steven M Claypool
Phosphatidylserine decarboxylase 1 (Psd1p), an ancient enzyme that converts phosphatidylserine to phosphatidylethanolamine in the inner mitochondrial membrane, must undergo an autocatalytic self-processing event to gain activity. Autocatalysis severs the protein into a large membrane anchored β subunit that non-covalently associates with the small α subunit on the intermembrane space side of the inner membrane. Here, we determined that a temperature sensitive (ts) PSD1 allele is autocatalytically impaired and that its fidelity is closely monitored throughout its life cycle by multiple mitochondrial quality control proteases...
June 12, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28600979/circulating-microvesicle-number-function-and-small-rna-content-vary-with-age-gender-smoking-status-lipid-and-hormone-profiles
#17
Anoop K Enjeti, Anita Ariyarajah, Angel D'Crus, Michael Seldon, Lisa F Lincz
BACKGROUND: Characterization of circulating microvesicles (MV) in healthy subjects in relation to various biological factors is not well studied. OBJECTIVES: We evaluated the influence of age, gender, smoking status, lipid and hormone profiles on circulating MV in healthy subjects. METHODS: Platelet free plasma from 143 volunteer blood donors (males=80, females=63) was evaluated by standardized flow cytometry for MV expressing CD41 (platelet-derived), CD105 (endothelial-derived), CD235 (red cell-derived), TF (tissue factor) and phosphatidylserine (PS) MV...
April 20, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28597089/vosalophen-a-vanadium-complex-with-a-stilbene-derivative-induction-of-apoptosis-autophagy-and-efficiency-in-experimental-cutaneous-leishmaniasis
#18
Patrícia de A Machado, Jessica O F Morais, Gustavo S G Carvalho, Wallace P Lima, Gilson C Macedo, Elizandra A Britta, Celso V Nakamura, Adilson D da Silva, Alexandre Cuin, Elaine S Coimbra
In our previous work, we demonstrated the promising in vitro effect of VOSalophen, a vanadium complex with a stilbene derivative, against Leishmania amazonensis. Its antileishmanial activity has been associated with oxidative stress in L. amazonensis promastigotes and L. amazonensis-infected macrophages. In the present study, the mechanism involved in the death of parasites after treatment with VOSalophen, as well as in vivo effect in the murine model cutaneous leishmaniasis, has been investigated. Promastigotes of L...
June 8, 2017: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/28596964/oxidative-stress-induced-dna-damage-by-manganese-dioxide-nanoparticles-in-human-neuronal-cells
#19
Saud Alarifi, Daoud Ali, Saad Alkahtani
Metal nanoparticles have been extensively used in industry as well as in biomedical application. In this work, we have evaluated the toxic potential of manganese dioxide (MnO2) nanoparticles (MNPs) on human neuronal (SH-SY5Y) cells. Cellular toxicity due to MNPs (0, 10, 30, and 60 μg/ml) on the SH-SY5Y cell was observed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and neutral red uptake (NRU) tests. MNPs produced reactive oxygen species (ROS) and declined in mitochondrial membrane potential in the SH-SY5Y cell in dose and duration dependent manner...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28595835/the-effect-of-resveratrol-its-naturally-occurring-derivatives-and-tannic-acid-on-the-induction-of-cell-cycle-arrest-and-apoptosis-in-rat-c6-and-human-t98g-glioma-cell-lines
#20
Małgorzata Zielińska-Przyjemska, Mariusz Kaczmarek, Violetta Krajka-Kuźniak, Michał Łuczak, Wanda Baer-Dubowska
Resveratrol (3,5,4'-trihydroxy-trans-stilbene) is a potent chemopreventive and potentially cancer therapeutic agent. Since rapid metabolism limits resveratrol bioavailability, derivatives less prone to metabolic transformation are being sought and tested. We evaluated the effect of resveratrol, and its analogs (pterostilbene and 3,5,4'-trimethoxystilbene) along with tannic acid, on cell cycle and apoptosis in rat C6 and human T98G glioma cells. At concentration ranges both lower and higher than IC50 calculated based on MTT assay, all these polyphenols affected the cell cycle distribution...
June 6, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
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