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Julie K Freed, Matthew J Durand, Brian Robert Hoffmann, John C Densmore, Andrew S Greene, David D Gutterman
In order to examine the effect of endothelial-derived extracellular vesicles (eEVs) on the mechanism of flow-induced dilation (FID) composition, formation, and functional effects on the mechanism of FID were examined from two different eEV subtypes, one produced from ceramide, the other from plasminogen-activator inhibitor 1 (PAI-1). Using videomicroscopy, internal diameter changes in response to increases in flow were measured in human adipose resistance arteries acutely exposed (30min) to eEVs derived from cultured endothelial cells exposed to ceramide or PAI-1...
February 17, 2017: American Journal of Physiology. Heart and Circulatory Physiology
Bianca Paulitsch, Jeongsik Yun, Aliaksandr S Bandarenka
The so-called Prussian Blue Analogues (PBAs) are spotlighted as promising cathode materials for aqueous Na-ion batteries regarding their good performance for the application in future large scale energy storage systems. In this work, we demonstrate that one of the PBA representatives, namely Na2VOx[Fe(CN)6] thin films (VHCFs), is a promising cathode material for aqueous Na-ion batteries with very positive intercalation/de-intercalation potentials, which might likely designate a new benchmark in the field. In order to maximize the material utilization, we have formed VHCF thin films on model current collectors from aqueous solutions...
February 16, 2017: ACS Applied Materials & Interfaces
Manli Chen, Qin Liu, Lijian Chen, Lei Zhang, Erwei Gu
Remifentanil postconditioning (RPC) elicits cardioprotection against ischemia/reperfusion injury (IRI) by attenuating apoptosis associated with endoplasmic reticulum stress (ERS). Histone H3, acetylation modifications of histone H3, and histone deacetylases (HDAC) also have key roles in the mediation of the survival and apoptosis of cardiomyocytes. In this study, an in vitro IRI model was established with H9c2 cardiomyoblasts to investigate the role of histone H3 acetylation and HDAC3 in RPC-induced attenuation of ERS-associated apoptosis...
February 16, 2017: Apoptosis: An International Journal on Programmed Cell Death
Ursula Schmid, Werner Stenzel, Josephin Koschel, Maria Raptaki, Xu Wang, Michael Naumann, Kai Matuschewski, Dirk Schlüter, Gopala Nishanth
Cerebral malaria is a severe complication of human malaria and may lead to death of Plasmodium falciparum-infected individuals. Cerebral malaria is associated with sequestration of parasitized red blood cells within the cerebral microvasculature resulting in damage of the blood-brain barrier and brain pathology. Although CD8(+) T cells have been implicated in the development of murine experimental cerebral malaria (ECM), several other studies have shown that CD8(+) T cells confer protection against blood-stage infections...
2017: Frontiers in Immunology
Joulia Larionova, Guillaume Maurin-Pasturel, Jérôme Long, Maria A Palacios, Christian Guérin, Clarence Charnay, Marc-Georg Willinger, Alexander A Trifonov, Yannick Guari
We report a new approach to the synthesis of multifunctional Au core - Prussian Blue Analogous (PBA) shell nanoheterostructures consisting in the PBA shell growth on the surface of the cyanide-stabilized gold nanoparticles. It permits to design Au@KNiII[FeII(CN)6] core@shell and Au@KNiII[FeII(CN)6]@KNiII[CrIII(CN)6] core@shell@shell heterostructures with well-defined and size controlled gold core and PBA shells. The heterostructures exhibit size and shape-dependent magnetic and optical properties which may be tuned: (i) the Surface Plasmon Resonance band position and intensity mainly depend on the PBA shell thickness, and (ii) the magnetic properties (the transition temperature, the coercivity, a magnetic regime) depend in a complex manner on the thickness, as well as the particular morphology of the magnetic shell...
February 10, 2017: Chemistry: a European Journal
Jin Su, Yan Yan, Jingkun Qu, Xuewen Xue, Zi Liu, Hui Cai
Emodin is a phytochemical with potent anticancer activities against various human malignant cancer types, including lung cancer; however, the molecular mechanisms underlying the effects of emodin remain unclear. In the present study, the A549 and H1299 human non-small lung cancer cell lines were treated with emodin and the induced molecular effects were investigated. Changes in cell viability were evaluated by MTT assay, Hoechst staining was used to indicate the apoptotic cells, and western blotting was utilized to assess endoplasmic reticulum (ER) stress and signaling changes...
March 2017: Oncology Reports
Gentzane Sánchez-Elexpuru, José M Serratosa, Pascual Sanz, Marina P Sánchez
Lafora disease (LD) is a rare adolescent-onset progressive myoclonic epilepsy caused by loss-of-function mutations either in the EPM2A gene encoding laforin or in the EPM2B gene encoding malin. Mouse models with deletion in the Epm2a or the Epm2b gene show intracellular aggregates of polyglucosans (Lafora bodies) and neurological complications that resemble those observed in patients with LD. In the absence of laforin or malin expression, mice also show different degrees of hyperexcitability, as reflected by an enhanced response to the convulsant drug pentylenetetrazol (PTZ)...
February 8, 2017: Neuroreport
Taira Kajisa, Toshiya Sakata
In this paper, we propose a highly sensitive and biocompatible glucose sensor using a semiconductor-based field effect transistor (FET) with a functionalized hydrogel. The principle of the FET device contributes to the easy detection of ionic charges with high sensitivity, and the hydrogel coated on the electrode enables the specific detection of glucose with biocompatibility. The copolymerized hydrogel on the Au gate electrode of the FET device is optimized by controlling the mixture ratio of biocompatible 2-hydroxyethylmethacrylate (HEMA) as the main monomer and vinylphenylboronic acid (VPBA) as a glucose-responsive monomer...
2017: Science and Technology of Advanced Materials
Dayun Feng, Bao Wang, Lei Wang, Neeta Abraham, Kai Tao, Lu Huang, Wei Shi, Yushu Dong, Yan Qu
Melatonin has demonstrated a potential protective effect in central nervous system. Thus, it is interesting to determine whether pre-ischemia melatonin administration could protect against cerebral ischemia/reperfusion (IR) related injury and the underlying molecular mechanisms. In this study, we revealed that IR injury significantly activated endoplasmic reticulum (ER) stress and autophagy in a middle cerebral artery occlusion (MCAO) mouse model. Pre-ischemia melatonin treatment was able to attenuate IR-induced ER stress and autophagy...
February 8, 2017: Journal of Pineal Research
Xin-Hu Lv, Shun-Shun Li, Cong-Yu Tian, Mao-Mao Yang, Cheng Li, Yan Zhou, Xiao-Li Sun, Jun Zhang, Wen-Ming Wan
A simplified one-pot and less harmful method has been introduced for the synthesis of borinic acid monomer. The corresponding borinic acid polymer (PBA) has been prepared by reversible addition-fragmentation chain transfer polymerization. Property investigations confirm the characteristics of PBA as a new type of "smart material" in the field of thermo-responsive polymer. The potential application of PBA in the field of enzymatic biofuel cell has been illustrated with a wide open circuit potential of 0.92 V...
February 7, 2017: Macromolecular Rapid Communications
Shin Mukai, Yoko Ogawa, Fumihiko Urano, Chie Kudo-Saito, Yutaka Kawakami, Kazuo Tsubota
Chronic graft-versus-host disease (cGVHD) is a notorious complication of allogeneic hematopoietic stem cell transplantation and causes disabling systemic inflammation and fibrosis. In this novel study, we focused on a relationship between endoplasmic reticulum (ER) stress and cGVHD, and aimed to create effective treatment of cGVHD. A series of experiments were conducted using a mouse model of cGVHD. Our data suggested (1) that ER stress was elevated in organs affected by cGVHD and (2) that 4-phenylbutyric acid (PBA) could reduce cGVHD-induced ER stress and thereby alleviate systemic inflammation and fibrosis...
February 6, 2017: Scientific Reports
Suresh Ranga Rao, Subbarayan Rajasekaran, Supraja Ajitkumar, Murugan Girija Dinesh
Cyclosporine induces overgrowth of human gingiva. Previously we have shown (i) cyclosporine - inducing ER stress in human gingival fibroblasts, (ii) increased matrix protein expression, and (iii) interference with mitochondrial pro- and anti - apoptotic factors. This study was undertaken to assess the effects of melatonin (an antioxidant), 4PBA (an ER stress inhibitor), and simvastatin on the expression of ER Stress markers, as well as on matrix and mitochondrial markers. Human gingival fibroblasts incubated with cyclosporine, or without melatonin/4PBA/statin...
February 3, 2017: Journal of Cellular Physiology
Qinyue Guo, Lin Xu, Huixia Li, Hongzhi Sun, Shufang Wu, Bo Zhou
BACKGROUND: 4-phenyl butyric acid (4-PBA) has been considered as a key regulator of insulin resistance in obesity. However the mechanism of 4-PBA involved in insulin resistance remains elusive. METHODS: We evaluated the effect of 4-PBA on abnormal autophagy and endoplasmic reticulum (ER) stress in obese mice. 4-PBA was administered in obese mice and adipocyte models, and metabolic parameters, autophagy markers, ER stress indicators, Akt/mTOR signaling and insulin signaling molecular were assessed...
March 11, 2017: Biochemical and Biophysical Research Communications
A Garballo-Rubio, J Soto-Chinchilla, A Moreno, A Zafra-Gómez
Today, food security is one of the most important global issues with food quality control and identification of contaminants in foods and beverages, being crucial for human health and safety. In this paper, a novel single-step method for the simultaneous determination of 3-monochloropropanediol (3-MCPD) and glycidyl esters in samples of winterized and non-winterized fish oil by using gas chromatography tandem mass spectrometry (GC-MS/MS) is validated. The method is based on alkaline hydrolysis of esters at room temperature, using only 3-MCPD-d5 as internal standard, and a derivatization step with phenylboronic acid (PBA) at 90°C...
April 1, 2017: Talanta
Zahraa Mohammed-Ali, Chao Lu, Mandeep K Marway, Rachel E Carlisle, Kjetil Ask, Dusan Lukic, Joan C Krepinsky, Jeffrey G Dickhout
Endoplasmic reticulum (ER) stress is implicated in chronic kidney disease (CKD) development in patients and in animal models. Here we show that ER stress inhibition through 4-phenylbutyric acid (4-PBA) administration decreases blood pressure, albuminuria, and tubular casts in an angiotensin II/deoxycorticosterone acetate/salt murine model of CKD. Lower albuminuria in 4-PBA-treated mice was associated with higher levels of cubilin protein in renal tissue membrane fractions. 4-PBA decreased renal interstitial fibrosis, renal CD3(+) T-cell and macrophage infiltration, mRNA expression of TGFβ1, Wnt signaling molecules, and ER stress-induced pro-inflammatory genes...
February 2, 2017: Scientific Reports
Kazusa Katarao, Seiya Murakawa, Masaya Asano, Naoto Usuki, Hikaru Yamamoto, Toshihiko Shirafuji, Shigeru Tanaka, Izumi Hide, Norio Sakai
The function of the serotonin transporter (SERT) is regulated by its membrane trafficking. Previously, we showed that the C-terminus-deleted mutant of SERT (SERTΔCT) exhibited an aberrant membrane trafficking and subsequent retention at the endoplasmic reticulum (ER). In addition, we found that proteasome inhibitor-induced ER stress resulted in the impairment of SERT membrane trafficking and retention of SERT at the ER, an impairment very similar to that of SERTΔCT. Based on the result that the chemical chaperone 4-phnylbutulic acid (4-PBA), which relieves ER stress, accelerated the membrane trafficking and upregulated SERT activity, we hypothesized that drugs that facilitate the membrane trafficking of SERT would have potential therapeutic effects on an ER stress-related disease...
December 28, 2016: Acta Histochemica et Cytochemica
Melissa A Schneider, Matthew D Schneider
Pseudobulbar affect (PBA) is a neurologic condition that can happen after a patient has had some kind of neurological insult. In this syndrome, involuntary, uncontrollable, and inappropriate emotional outbursts unrelated or out of proportion to the situation are common symptoms. This can be very frustrating and scary. Because stroke survivors and their caregivers are overloaded with information during the transition from hospital to home, information about PBA is not usually discussed. In a survey by the National Stroke Association, 53% of stroke survivors reported that they had some of the symptoms of this disorder...
January 25, 2017: Journal of Neuroscience Nursing: Journal of the American Association of Neuroscience Nurses
Qi-Cheng Zhang, Zhen-Hua Pan, Bo-Ning Liu, Zhao-Wei Meng, Xiang Wu, Qing-Hua Zhou, Ke Xu
Isothiocyanates, such as allyl isothiocya¬nate (AITC), benzyl isothiocyanate (BITC), phenethyl isothio¬cyanate (PEITC) and sulforaphane (SFN), are natural compounds abundant in cruciferous vegetables, which have substantial chemopreventive activities against various human malignancies. However, the mechanisms underlying the inhibition of tumor cell growth by isothiocyanates are not fully understood. Since autophagy has dual functions in cancer, in the present study we investigated the effects of BITC on autophagy induction in human lung cancer cells in vitro and in vivo...
January 23, 2017: Acta Pharmacologica Sinica
B Guleyupoglu, J Schap, K D Kusano, F S Gayzik
OBJECTIVE: The objective of this study is to use a validated finite element model of the human body and a certified model of an ATD to evaluate the effect of simulated pre-crash braking on driver kinematics, restraint loads, body loads and computed injury criteria in four commonly-injured body regions. METHODS: The Global Human Body Models Consortium (GHBMC) 50th percentile male occupant (M50-O) and the Humanetics Hybrid-III 50(th) percentile models were gravity settled in the driver position of a generic interior equipped with an advanced three point belt and driver airbag...
January 19, 2017: Traffic Injury Prevention
Vladimir Gorshkov, Stanford Kwenda, Olga Petrova, Elena Osipova, Yuri Gogolev, Lucy N Moleleki
The ability to adapt to adverse conditions permits many bacterial species to be virtually ubiquitous and survive in a variety of ecological niches. This ability is of particular importance for many plant pathogenic bacteria that should be able to exist, except for their host plants, in different environments e.g. soil, water, insect-vectors etc. Under some of these conditions, bacteria encounter absence of nutrients and persist, acquiring new properties related to resistance to a variety of stress factors (cross-protection)...
2017: PloS One
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