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https://www.readbyqxmd.com/read/28544355/temporal-overexpression-of-sirt1-in-skeletal-muscle-of-adult-mice-does-not-improve-insulin-sensitivity-or-markers-of-mitochondrial-biogenesis
#1
Kristoffer Svensson, Samuel A LaBarge, Vitor F Martins, Simon Schenk
AIMS: Activation of the NAD(+) dependent protein deacetylase SIRT1 has been proposed as a therapeutic strategy to treat mitochondrial dysfunction and insulin resistance in skeletal muscle. However, life-long overexpression of SIRT1 in skeletal muscle does not improve parameters of mitochondrial function and insulin sensitivity. In this study we investigated whether temporal overexpression of SIRT1 in muscle of adult mice would affect skeletal muscle mitochondrial function and insulin sensitivity...
May 22, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28539592/atorvastatin-promotes-phagocytosis-and-attenuates-pro-inflammatory-response-in-human-retinal-pigment-epithelial-cells
#2
Bo Tian, Ahmad Al-Moujahed, Peggy Bouzika, Yijun Hu, Shoji Notomi, Pavlina Tsoka, Joan W Miller, Haijiang Lin, Demetrios G Vavvas
Phagocytosis of daily shed photoreceptor outer segments is an important function of the retinal pigment epithelium (RPE) and it is essential for retinal homeostasis. RPE dysfunction, especially impairment of its phagocytic ability, plays an essential role in the pathogenesis of age-related macular degeneration (AMD). Statins, or HMG CoA (3-hydroxy-3-methylglutaryl-coenzyme A) reductase inhibitors, are drugs with multiple properties that have been extensively used to treat hyperlipidemia. However, their effect on RPE cells has not been fully elucidated...
May 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28539444/improved-prefusion-stability-optimized-codon-usage-and-augmented-virion-packaging-enhance-the-immunogenicity-of-respiratory-syncytial-virus-rsv-fusion-protein-in-a-vectored-vaccine-candidate
#3
Bo Liang, Joan O Ngwuta, Sonja Surman, Barbora Kabatova, Xiang Liu, Matthias Lingemann, Xueqiao Liu, Lijuan Yang, Richard Herbert, Joanna Swerczek, Man Chen, Syed M Moin, Azad Kumar, Jason S McLellan, Peter D Kwong, Barney S Graham, Peter L Collins, Shirin Munir
Respiratory syncytial virus (RSV) is the most important viral agent of severe pediatric respiratory tract disease worldwide, but lacks a licensed vaccine or suitable antiviral drug. A live-attenuated chimeric bovine/human parainfluenza virus type-3 (rB/HPIV3) was developed previously as a vector expressing RSV fusion (F) protein to confer bivalent protection against RSV and HPIV3. In a previous clinical trial in virus-naïve children, rB/HPIV3 was well-tolerated but the immunogenicity of wildtype RSV F was unsatisfactory...
May 24, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28539186/a-survey-of-inpatient-practitioner-knowledge-of-penicillin-allergy-at-2-community-teaching-hospitals
#4
Mary L Staicu, Dipekka Soni, Kelly M Conn, Allison Ramsey
BACKGROUND: The negative effect of the penicillin allergy label on antibiotic use and patient outcomes has brought to light the need for thorough penicillin allergy assessments and heightened practitioner education. OBJECTIVE: To evaluate practitioner knowledge of penicillin allergy and the clinical approach to the patients with penicillin allergy. METHODS: An electronic survey was distributed to attending physicians, residents, pharmacists, nurse practitioners, and physician assistants practicing adult inpatient medicine at 2 community-based teaching hospitals from February to April 2016...
May 20, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28539174/drug-metabolism-in-the-elderly-a-multifactorial-problem
#5
REVIEW
R H Waring, R M Harris, S C Mitchell
Whether or not an individual's drug metabolising capacity declines with advancing age is a vexing question. There is no clear evidence that drug metabolism itself ('the biologically-assisted chemical alteration of the administered parent molecule') is less efficient in healthy old age than at younger ages, whereas a decreased capacity may be associated with ill-health and frailty. However, elderly individuals do show a reduced enzyme induction capability and are less able to tolerate overdoses. It appears that the majority of deleterious clinical outcomes related to drug therapy in an elderly (usually ill or frail) population may be ascribed to various anatomical and physiological age-related changes...
June 2017: Maturitas
https://www.readbyqxmd.com/read/28537017/copper-bioaccumulation-photosystem-ii-functioning-and-oxidative-stress-in-the-seagrass-cymodocea-nodosa-exposed-to-copper-oxide-nanoparticles
#6
Michael Moustakas, Paraskevi Malea, Katerina Haritonidou, Ilektra Sperdouli
Photosynthetic activity, oxidative stress, and Cu bioaccumulation in the seagrass Cymodocea nodosa were assessed 4, 12, 24, 48, and 72 h after exposure to two copper oxide nanoparticle (CuO NP) concentrations (5 and 10 mg L(-1)). CuO NPs were characterized by scanning electron microscopy (SEM) and dynamic light scattering measurements (DLS). Chlorophyll fluorescence analysis was applied to detect photosystem II (PSII) functionality, while the Cu accumulation kinetics into the leaf blades was fitted to the Michaelis-Menten equation...
May 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28536765/silicon-mediated-changes-in-radial-hydraulic-conductivity-and-cell-wall-stability-are-involved-in-silicon-induced-drought-resistance-in-tomato
#7
Bi-Li Cao, Lili Wang, Song Gao, Jie Xia, Kun Xu
Plants frequently experience drought stress. It is well known that silicon (Si) facilitates recovery from drought stress by improving drought resistance in plants. However, the effects of Si on the roots associated with the drought resistance in plants remain elusive. In this study, tomato (cv. 'Jinpeng 1(#)') was adopted to study the silicon-mediated drought avoidance and drought tolerance. The results showed that exogenous Si evidently influenced the drought-induced changes of the related indicators. Roots added with Si were more adaptable to drought stress...
May 23, 2017: Protoplasma
https://www.readbyqxmd.com/read/28536579/peripherally-induced-regulatory-t-cells-recruited-protectors-of-the-central-nervous-system-against-autoimmune-neuroinflammation
#8
REVIEW
Andrew Jones, Daniel Hawiger
Defects in regulatory T cells (Treg cells) aggravate multiple sclerosis (MS) after its onset and the absence of Treg cell functions can also exacerbate the course of disease in an animal model of MS. However, autoimmune neuroinflammation in many MS models can be acutely provoked in healthy animals leading to an activation of encephalitogenic T cells despite the induction of immune tolerance in the thymus including thymically produced (t)Treg cells. In contrast, neuroinflammation can be ameliorated or even completely prevented by the antigen-specific Treg cells formed extrathymically in the peripheral immune system (pTreg cells) during tolerogenic responses to relevant neuronal antigens...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28536351/oncolytic-vesicular-stomatitis-virus-as-a-viro-immunotherapy-defeating-cancer-with-a-hammer-and-anvil
#9
REVIEW
Michael Karl Melzer, Arturo Lopez-Martinez, Jennifer Altomonte
Oncolytic viruses have gained much attention in recent years, due, not only to their ability to selectively replicate in and lyse tumor cells, but to their potential to stimulate antitumor immune responses directed against the tumor. Vesicular stomatitis virus (VSV), a negative-strand RNA virus, is under intense development as an oncolytic virus due to a variety of favorable properties, including its rapid replication kinetics, inherent tumor specificity, and its potential to elicit a broad range of immunomodulatory responses to break immune tolerance in the tumor microenvironment...
February 10, 2017: Biomedicines
https://www.readbyqxmd.com/read/28535448/bipolar-postpartum-depression-an-update-and-recommendations
#10
REVIEW
Verinder Sharma, Minakshi Doobay, Christine Baczynski
BACKGROUND: Over the past few years there has been a surge of interest in the study of bipolar postpartum depression (PPD); however, questions remain about its prevalence, screening, clinical features, and treatment. METHODS: Three electronic databases, MEDLINE/PubMed (1966-2016), PsycINFO (1806-2016), and the Cochrane Database of Systematic Reviews, were searched using a combination of the keywords bipolar, depression, postpartum, peripartum, prevalence, screening, diagnosis, treatment, drugs, and psychotherapy...
May 11, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28535410/effect-of-enzyme-inhibition-on-perampanel-pharmacokinetics-why-study-design-matters
#11
Barry E Gidal, Rama Maganti, Antonio Laurenza, Haichen Yang, David A Verbel, Edgar Schuck, Jim Ferry
OBJECTIVES: Perampanel, a selective, noncompetitive AMPA receptor antagonist, is indicated as adjunctive therapy for the treatment of partial seizures with or without secondarily generalized seizures and primary generalized tonic-clonic seizures in patients with epilepsy aged 12years and older. In vitro studies and Phase I trials indicate that perampanel is metabolized almost exclusively by CYP3A, with an elimination half-life (t1/2) averaging approximately 105h. Understanding of pharmacokinetic (PK) interactions-enzyme inhibition or induction-and anticipating their occurrence are important for management of patients with epilepsy...
April 26, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28534819/ginsenoside-rb2-alleviates-hepatic-lipid-accumulation-by-restoring-autophagy-via-induction-of-sirt1-and-activation-of-ampk
#12
Qi Huang, Ting Wang, Liu Yang, He-Yao Wang
Although Panax ginseng is a famous traditional Chinese medicine and has been widely used to treat a variety of metabolic diseases including hyperglycemia, hyperlipidemia, and hepatosteatosis, the effective mediators and molecular mechanisms remain largely unknown. In this study we found that ginsenoside Rb2, one of the major ginsenosides in Panax ginseng, was able to prevent hepatic lipid accumulation through autophagy induction both in vivo and in vitro. Treatment of male db/db mice with Rb2 significantly improved glucose tolerance, decreased hepatic lipid accumulation, and restored hepatic autophagy...
May 19, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28534571/toward-high-resolution-nmr-spectroscopy-of-microscopic-liquid-samples
#13
Mark C Butler, Hardeep S Mehta, Ying Chen, Patrick N Reardon, Ryan S Renslow, Michael Khbeis, Duane Irish, Karl T Mueller
A longstanding limitation of high-resolution NMR spectroscopy is the requirement for samples to have macroscopic dimensions. Commercial probes, for example, are designed for volumes of at least 5 μL, in spite of decades of work directed toward the goal of miniaturization. Progress in miniaturizing inductive detectors has been limited by a perceived need to meet two technical requirements: (1) minimal separation between the sample and the detector, which is essential for sensitivity, and (2) near-perfect magnetic-field homogeneity at the sample, which is typically needed for spectral resolution...
May 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28534310/combination-immunotherapy-for-type-1-diabetes
#14
REVIEW
Robert N Bone, Carmella Evans-Molina
PURPOSE OF REVIEW: Type 1 diabetes (T1D) is an autoimmune disease marked by β-cell destruction. Immunotherapies for T1D have been investigated since the 1980s and have focused on restoration of tolerance, T cell or B cell inhibition, regulatory T cell (Treg) induction, suppression of innate immunity and inflammation, immune system reset, and islet transplantation. The purpose of this review is to provide an overview and lessons learned from single immunotherapy trials, describe recent and ongoing combination immunotherapy trials, and provide perspectives on strategies for future combination clinical interventions aimed at preserving insulin secretion in T1D...
July 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/28534253/evaluating-the-involvement-and-interaction-of-abscisic-acid-and-mirna156-in-the-induction-of-anthocyanin-biosynthesis-in-drought-stressed-plants
#15
REVIEW
Jorge González-Villagra, Leonid V Kurepin, Marjorie M Reyes-Díaz
ABA is involved in anthocyanin synthesis through the regulation of microRNA156, augmenting the level of expression of anthocyanin synthesis-related genes and, therefore, increasing anthocyanin level. Drought stress is the main cause of agricultural crop loss in the world. However, plants have developed mechanisms that allow them to tolerate drought stress conditions. At cellular level, drought stress induces changes in metabolite accumulation, including increases in anthocyanin levels due to upregulation of the anthocyanin biosynthetic pathway...
May 22, 2017: Planta
https://www.readbyqxmd.com/read/28533774/the-role-of-ifn-%C3%AE-during-the-course-of-sepsis-progression-and-its-therapeutic-potential
#16
REVIEW
Gorjana Rackov, Rahman Shokri, Melchor Álvarez De Mon, Carlos Martínez-A, Dimitrios Balomenos
Sepsis is a complex biphasic syndrome characterized by both pro- and anti-inflammatory immune states. Whereas early sepsis mortality is caused by an acute, deleterious pro-inflammatory response, the second sepsis phase is governed by acute immunosuppression, which predisposes patients to long-term risk for life-threatening secondary infections. Despite extensive basic research and clinical trials, there is to date no specific therapy for sepsis, and mortality rates are on the rise. Although IFN-β is one of the most-studied cytokines, its diverse effects are not fully understood...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28533507/kif4a-mediate-the-accumulation-and-reeducation-of-thp-1-derived-macrophages-via-regulation-of-ccl2-ccr2-expression-in-crosstalking-with-oscc
#17
Yun Zhang, Shaohua Liu, Daiwei Qu, Ketao Wang, Lin Zhang, Xuanxuan Jing, Chen Li, Fengcai Wei, Xun Qu
Crosstalk between tumor infiltrating macrophages and tumor cells is thought to play an indispensable role in oral squamous cell carcinomas (OSCC) by induction and maintenance of tolerance microenvironment. High infiltration of M2 macrophages and increasing expression of Kinesin family member 4A (Kif4A) in primary OSCC have been proved to correlate with greater tumoral size and poor clinical outcome. However, linkage between Kif4A and infiltrating macrophages in tumorigenesis and progression remains unclear...
May 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28533287/trv0109101-a-g-protein-biased-agonist-of-the-%C3%A2%C2%B5-opioid-receptor-does-not-promote-opioid-induced-mechanical-allodynia-following-chronic-administration
#18
Michael Koblish, Richard Carr, Edward R Siuda, David H Rominger, William Gowen-MacDonald, Conrad L Cowan, Aimee L Crombie, Jonathan D Violin, Michael W Lark
Prescription opioids are a mainstay in the treatment of acute moderate to severe pain. However, chronic use leads to a host of adverse consequences including tolerance and opioid-induced hyperalgesia (OIH), leading to more complex treatment regimens and diminished patient compliance. Patients experiencing OIH paradoxically experience exaggerated nociceptive responses instead of pain reduction after chronic opioid usage. The development of OIH and tolerance tend to occur simultaneously and, thus, present a challenge when studying the molecular mechanisms driving each phenomenon...
May 22, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28532536/-role-of-sox4-on-ddp-resistance-in-non-small-cell-lung-cancer-cell-of-a549
#19
Wei Li, Xu Liu, Guoqian Zhang, Linlin Zhang
BACKGROUND: Lung cancer is one of the most serious disease and the incidence of non-small cell lung cancer (NSCLC) is the highest in lung cancer. The main reason for the failure of chemotherapy is the tolerance to cisplatin. Transcriptional regulator SOX4 plays an important role in the occurrence and development of many tumors, and regulates Wnt signaling pathway by regulating the expression of β-catenin. We aimed to investigate the role of SOX4 on cisplatin-resistance in NSCLC cell A549 cell...
May 20, 2017: Zhongguo Fei Ai za Zhi, Chinese Journal of Lung Cancer
https://www.readbyqxmd.com/read/28530706/akt-is-indispensable-for-coordinating-par-4-jnk-cross-talk-in-p21-downmodulation-during-er-stress
#20
R U Rasool, D Nayak, S Chakraborty, M M Faheem, B Rah, P Mahajan, V Gopinath, A Katoch, Z Iqra, S K Yousuf, D Mukherjee, L D Kumar, A Nargotra, A Goswami
The double-edged role of p21 to command survival and apoptosis is emerging. The current investigation highlights ER stress-mediated JNK activation that plausibly triggers cell death by attenuating endogenous p21 level. Here, we demonstrated that ER stress activator 3-AWA diminishes the p21 levels in cancer cells by averting the senescent phenotype to commence G2/M arrest. In essence, the deceleration in p21 level occurs through ER stress/JNK/Caspase-3 axis via activation/induction of proapoptotic Par-4 and inhibition of AKT...
May 22, 2017: Oncogenesis
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