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https://www.readbyqxmd.com/read/29663489/high-glucose-induced-excessive-reactive-oxygen-species-promote-apoptosis-through-mitochondrial-damage-in-rat-cartilage-endplate-cells
#1
Zengxin Jiang, Wei Lu, Qingmin Zeng, Defang Li, Lei Ding, Jingping Wu
PURPOSE: Diabetes mellitus (DM) is an important factor in intervertebral disc degeneration (IDD). Apoptosis of cartilage endplate (CEP) cells is one of the initiators of IDD. However, the effects of high glucose on CEP cells are still unknown. Therefore, we conducted the present study to evaluate the effects of high glucose on CEP cells and to identify the mechanisms of those effects. METHODS: Rat CEP cells were isolated and cultured in 10% foetal bovine serum (FBS, normal control) or high-glucose medium (10% FBS + 0...
April 16, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29660187/increased-flexibility-in-the-use-of-exogenous-lipoic-acid-by-staphylococcus-aureus
#2
Irina Laczkovich, Wei Ping Teoh, Sarah Flury, James P Grayczyk, Azul Zorzoli, Francis Alonzo
Lipoic acid is a cofactor required for intermediary metabolism that is either synthesized de novo or acquired from environmental sources. The bacterial pathogen Staphylococcus aureus encodes enzymes required for de novo biosynthesis, but also encodes two ligases, LplA1 and LplA2, that are sufficient for lipoic acid salvage during infection. S. aureus also encodes two H proteins, GcvH of the glycine cleavage system and the homologous GcvH-L encoded in an operon with LplA2. GcvH is a recognized conduit for lipoyl transfer to α-ketoacid dehydrogenase E2 subunits, while the function of GcvH-L remains unclear...
April 16, 2018: Molecular Microbiology
https://www.readbyqxmd.com/read/29653414/new-insights-on-the-modulatory-roles-of-metformin-or-alpha-lipoic-acid-versus-their-combination-in-dextran-sulfate-sodium-induced-chronic-colitis-in-rats
#3
Fatma S Samman, Samah M Elaidy, Soha S Essawy, Mohammad S Hassan
BACKGROUND: Dextran sulfate sodium (DSS)-induced colitis is the most widely used model that resembles ulcerative colitis (UC) in human with challenging chronic mechanistic oxidative stress-inflammatory/immunological cascades. In models of acute colitis, reduction of oxidative stress and inflammatory burdens beside manipulation of many transcriptional factors were achieved by metformin or alpha-lipoic acid (α-LA). Currently, in vivo DSS-induced chronic colitis was conducted and the possible therapeutic roles of metformin and/or α-LA were explored...
November 24, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29627873/disease-modifying-treatment-in-progressive-multiple-sclerosis
#4
REVIEW
John Robert Ciotti, Anne Haney Cross
PURPOSE OF REVIEW: Multiple sclerosis (MS) is an immune-mediated disorder that affects the central nervous system (CNS), often first affecting people in early adulthood. Although most MS patients have a relapsing-remitting course (RRMS) at disease onset, a substantial proportion later develop chronic progression, termed secondary progressive MS (SPMS). Approximately 10% of MS patients experience chronic progression from disease onset, termed primary progressive multiple sclerosis (PPMS)...
April 7, 2018: Current Treatment Options in Neurology
https://www.readbyqxmd.com/read/29626110/impaired-endocrine-metabolic-homeostasis-underlying-mechanism-of-its-induction-by-unbalanced-diet
#5
Bárbara Maiztegui, Carolina Lisi Román, Juan José Gagliardino, Luis Emilio Flores
Aim : to characterize the intrinsic mechanism by which sucrose induces β-cell dysfunction. Methods : Normal rats received for 3 weeks a standard diet supplemented with 10% sucrose in the drinking water (HS) with/out an antioxidant agent (R/S α-lipoic acid). We measured plasma glucose, insulin, triglyceride, leptin and lipid peroxidation levels; homeostasis model assessment-insulin resistance (HOMA-IR) and HOMA-β indexes were also determined. Insulin secretion, β-cell apoptosis, intracellular insulin and leptin mediators, and oxidative stress (OS) markers were also measured in islets isolated from each experimental group...
April 6, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29601911/neuroprotective-effect-of-the-carnosine-%C3%AE-lipoic-acid-nanomicellar-complex-in-a-model-of-early-stage-parkinson-s-disease
#6
O I Kulikova, D S Berezhnoy, S L Stvolinsky, A V Lopachev, V S Orlova, T N Fedorova
In a model of early-stage Parkinson's disease induced by a single intranasal administration of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) to Wistar rats, a neuroprotective effect of a new derivative of carnosine and α-lipoic acid (C/LA nanomicellar complex) was demonstrated. Acute intraperitoneal administration of carnosine, α-lipoic acid and C/LA complex following MPTP administration normalized the total antioxidant activity in the brain tissue. Of all the compounds tested only C/LA complex normalized the metabolism of dopamine (DA) and serotonin (5-HT), while its components did not show similar effects when used separately...
March 27, 2018: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29597044/ex-vivo-absorption-study-of-lysine-r-lipoate-salt-a-new-pharmaceutical-form-of-r-ala
#7
Francesco Amenta, Michela Buccioni, Diego Dal Ben, Catia Lambertucci, Aleix Martí Navia, Michael A Ngouadjeu Ngnintedem, Massimo Ricciutelli, Andrea Spinaci, Rosaria Volpini, Gabriella Marucci
Alpha-lipoic acid (ALA) oral supplements were used in many pathologies associated with increased oxidative stress. Although only R-ALA is considered the biologically active form, R,S-ALA is used in therapeutic applications even showing poor water solubility. The aim of this work was to study the absorption and transport mechanism across the intestinal barrier of new R-ALA stable and water soluble form, consisting in the lysine R-ALA salt, in presence and absence of specific inhibitors of Na+ /multivitamin (SMVT) and monocarboxylic acids (MCT)...
March 26, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29595455/-mechanism-of-%C3%AE-lipoic-acid-promoting-iron-efflux-in-substantia-nigra-cells-of-parkinson-s-disease-rats
#8
Ting Cai, Cao Wei, Suzhen Zhai, Shengyan Tai, Chunlin Zhang, Ling Jiao
Objective To observe the effect of α-lipoic acid (α-LA) on the expressions of iron regulatory protein 2 (IRP2) and ferroportin1 (FP1) in substantia nigra of rats with Parkinson's disease (PD) and explore the mechanism by which α-LA regulates iron efflux in substantia nigra cells of PD rat models. Methods Sixty healthy male SD rats were randomly divided into a sham group (n=15) and a model group (n=45). To establish the PD model, the rats of the model group were injected with 6-hydroxydopamine (6-OHDA) into their right striatum by the stereotactic technique, and the sham operation group was injected with the same dose of normal saline...
January 2018: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/29594649/gold-nanoclusters-as-a-quenchable-fluorescent-probe-for-sensing-oxygen-at-high-temperatures
#9
Alba Martín-Barreiro, Susana de Marcos, Javier Galbán
Gold nanoclusters (AuNCs) capped with lipoic acid (LA) or templated with bovine serum albumin (BSA) are shown to be viable fluorescent probes for oxygen (O2 ) which acts as a collisional quencher. Quenching of fluorescence, with its lifetimes in the order of 123 ± 9 ns (LA) and 153 ± 15 ns (BSA) (in aqueous solution), is best measured at excitation/emission wavelengths of 400/680 nm and 375/650 nm respectively. It follows the Stern-Volmer model, whose quenching constants (Ksv ) and quenching efficiencies (γ) are 1400 M-1 and 0...
February 13, 2018: Mikrochimica Acta
https://www.readbyqxmd.com/read/29591887/pathological-effects-of-cigarettes-on-the-reproductive-system-and-the-protective-effects-of-alpha-lipoic-acid-in-female-rats
#10
Halil Asci, Onur Erol, Hamit Yasar Ellidag, Esra Nur Tola, Mehtap Savran, Ozlem Ozmen
Cigarette smoking (CS) has some detrimental effects that occur via oxidative stress (OS). The aim of this work was to demonstrate the pathological and immunohistochemical effects of CS and the protective effects of a strong antioxidant alpha lipoic acid (ALA) on CS-induced genital system changes in a rat model. Twenty-eight female rats were randomly allocated to three groups as control, CS-exposed, and CS-exposed and ALA-treated. Reproductive tract organs were collected for biochemical and pathological examinations...
January 1, 2018: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/29578317/least-median-of-squares-and-iteratively-re-weighted-least-squares-as-robust-linear-regression-methods-for-fluorimetric-determination-of-%C3%AE-lipoic-acid-in-capsules-in-ideal-and-non-ideal-cases-of-linearity
#11
Mohamed A Korany, Azza A Gazy, Essam F Khamis, Marwa A A Ragab, Miranda F Kamal
This study outlines two robust regression approaches, namely least median of squares (LMS) and iteratively re-weighted least squares (IRLS) to investigate their application in instrument analysis of nutraceuticals (that is, fluorescence quenching of merbromin reagent upon lipoic acid addition). These robust regression methods were used to calculate calibration data from the fluorescence quenching reaction (∆F and F-ratio) under ideal or non-ideal linearity conditions. For each condition, data were treated using three regression fittings: Ordinary Least Squares (OLS), LMS and IRLS...
March 26, 2018: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/29578215/%C3%AE-lipoic-acid-stabilized-dtx-ir780-micelles-for-photoacoustic-fluorescence-imaging-guided-photothermal-therapy-chemotherapy-of-breast-cancer
#12
WenTing Li, JinRong Peng, Qian Yang, LiJuan Chen, Lan Zhang, XiaoXin Chen, ZhiYong Qian
Micellar nanoparticles have unique advantages as carriers for therapeutic or imaging agents, owing to their smaller size and better penetration of tumors. However, some agents, due to their physical or chemical properties, are difficult to load into micelles. IR780 is one of these agents, and is also a promising near-infrared dye for fluorescence imaging (FI)/photoacoustic imaging (PAI) and cancer photothermal therapy (PTT). Its hydrophobic and high crystallization structure results in limited bioavailability in vivo...
March 26, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29577121/evaluation-of-the-nutrition-and-function-of-cow-and-goat-milk-based-on-intestinal-microbiota-by-metagenomic-analysis
#13
Zhaoxia Wang, Shuaiming Jiang, Chenchen Ma, Dongxue Huo, Qiannan Peng, Yuyu Shao, Jiachao Zhang
Milk contains nutrients needed by the body, and the main components of different animal milk vary. Accordingly, we evaluated cow and goat milk's nutrition and their effects on the gut microbiota in mice models using a high-throughput 16S rRNA sequencing technology. The intestinal microbiota of mice changed significantly after the intake of cow and goat milk, and the goat milk had a greater effect on the intestinal microbial community than the cow milk. Bifidobacterium, Allobaculum, Olsenella and Akkermansia grew significantly in both cow and goat milk groups compared with the control group, indicating that milk positively affected their growth...
March 26, 2018: Food & Function
https://www.readbyqxmd.com/read/29576255/first-description-of-the-alpha-lipoic-acid-intoxication-in-an-adult-patient-worldwide-following-oral-administration
#14
Muge Gulen, Yeliz Simsek, Emre Oner, Salim Satar
No abstract text is available yet for this article.
March 14, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29575431/integrated-transcriptomic-and-proteomic-analyses-reveal-%C3%A9-lipoic-acid-regulated-cell-proliferation-via-grb2-mediated-signalling-in-hepatic-cancer-cells
#15
Lan Yang, Xiliang Wang, Juan Xu, Ya Wen, Manqiao Zhang, Jingxiao Lu, Rongfu Wang, Xiaojuan Sun
Hepatocellular carcinoma is the most frequent primary liver cancer worldwide. The use of antioxidants as cancer prevention and treatment agents has become a focus of research in recent years due to their limited adverse effects. Alpha lipoic acid (ɑ-LA) is synthesized in the liver and is considered a naturally occurring antioxidant. In this study, a total of 4446 differentially expressed genes (2097 down-regulated and 2349 up-regulated) were identified via RNA-Seq in HepG2 cells after exposure to α-LA for 24 hrs...
March 25, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29574026/in-vitro-antioxidant-activity-of-thiazolidinone-derivatives-of-1-3-thiazole-and-1-3-4-thiadiazole
#16
Mirjana Djukic, Mara Fesatidou, Iakovos Xenikakis, Athina Geronikaki, Violina T Angelova, Vladimir Savic, Marta Pasic, Branislav Krilovic, Dusan Djukic, Borko Gobeljic, Marina Pavlica, Ana Djuric, Ivan Stanojevic, Danilo Vojvodic, Luciano Saso
The initial steps in preclinical drug developing research concern the synthesis of new compounds for specific therapeutic use which needs to be confirmed by in vitro and then in vivo testing. Nine thiazolidinone derivatives (numerically labeled 1-9) classified as follows: 1,3-thiazole-based compounds (1 and 2); 1,3,4-thiadiazole based compounds (3 and 4); substituted 5-benzylideno-2-adamantylthiazol[3,2-b][1,2,4]triazol-6(5H)ones (5-8); and an ethylaminothiazole-based chalcone (9), were tested for antioxidant activity (AOA) by using three in vitro assays: DPPH (1,1-diphenyl-2-picrylhydrazyl scavenging capacity test); FRAP (ferric reducing antioxidant power test); and TBARS (thiobarbituric acid reactive substances test)...
March 21, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29571016/the-role-of-nutrients-in-the-pathogenesis-and-treatment-of-migraine-headaches-review
#17
REVIEW
Elyas Nattagh-Eshtivani, Mahmood Alizadeh Sani, Monireh Dahri, Faezeh Ghalichi, Abed Ghavami, Pishva Arjang, Ali Tarighat-Esfanjani
OBJECTIVE: Migraine as a disabling neurovascular disease affects 6% of men and 18% of women worldwide. The deficiency of many nutrients including magnesium, niacin, riboflavin, cobalamin, coenzymes Q10, carnitine, α-lipoic acid and vitamin D is associated with migraine. Some researchers postulate that mitochondrial dysfunction and impaired antioxidant status can cause migraine. Also increase in homocysteine level can lead to migraine attacks; therefore, some Nutraceuticals play a vital role in migraine prevention...
March 20, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29568025/are-pharmacological-treatments-for-oro-facial-pain-effective
#18
Debra Fischoff, Silvia Spivakovsky
Data sourcesElectronic searches of PubMed, the Cochrane Library, Embase, the National Health Service Economic Evaluation Database and HTA until March 2017. Also handsearched referenced in the original articles. Grey literature was not included.Study selectionRandomised controlled trials with more than ten participants with oro-facial pain duration of more than three months were sub grouped into: TMD-muscle pain (TMD-m), TMD-joint pain (TMD-j), burning mouth syndrome (BMS) and other oro-facial pain. Studies include any pharmacological treatment against another pharmacological, non-pharmacological treatment, placebo or no treatment...
March 23, 2018: Evidence-based Dentistry
https://www.readbyqxmd.com/read/29559356/alpha-lipoic-acid-intoxicat%C3%A4-on-an-adult-case-report-and-l%C3%A4-terature-rev%C3%A4-ew
#19
Duygu Ferek Emir, Ibrahim Ulas Ozturan, Serkan Yilmaz
INTRODUCTION: Alpha lipoic acid (ALA) is a potent antioxidant used to treat a variety of disorders. Although ALA is considered a very safe supplement and intoxication is very rare, acute high-dose ingestions can cause mortality. In this report, we discuss a very rare case of ALA intoxication to increase awareness of this issue. CASE REPORT: A 22-year-old female was referred to our emergency department with ALA intoxication after ingesting a total of 18g of ALA with a suicidal intention...
March 13, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29553255/lipoyl-ester-terminated-star-plga-as-a-simple-and-smart-material-for-controlled-drug-delivery-application
#20
Xiuxiu Wang, Ru Cheng, Liang Cheng, Zhiyuan Zhong
PLGA, a copolymer of lactide and glycolide, is one of the most used biodegradable polymers that find a wide range of biomedical applications including drug delivery and tissue engineering. However, in spite of remarkable advancement, nanotherapeutics based on PLGA might have drawbacks of inadequate stability, drug leakage, and slow drug release at the tumor site, which reduces its targeting ability and therapeutic efficacy. Here, we report that direct modification of star PLGA ends with lipoic acid, a natural antioxidant present in our human body, affords a smart material (sPLGA-LA) that forms reversibly crosslinked and bioresponsive multifunctional nanoparticles (sPLGA XNPs)...
March 19, 2018: Biomacromolecules
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