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thioctic acid

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https://www.readbyqxmd.com/read/26990224/blockade-of-androgen-markers-using-a-novel-betasitosterol-thioctic-acid-and-carnitine-containing-compound-in-prostate-and-hair-follicle-cell-based-assays
#1
Li Chen, Jiaolong Wang, Glen Mouser, Yan Chun Li, Geno Marcovici
Androgenetic alopecia (AGA) affects approximately 70% of men and 40% of women in an age-dependent manner and is partially mediated by androgen hormones. Benign prostatic hyperplasia (BPH) similarly affects 50% of the male population, rising by 10% each decade. Finasteride inhibits 5-alpha reductase (5AR) and is used to treat both disorders, despite offering limited clinical benefits accompanied by significant adverse side effects. Building on our previous work demonstrating the efficacy of naturally derived 5AR inhibitors (such as stigmasterol and beta sitosterol), we hypothesize that targeting 5AR as well as inflammatory pathways may yield improved efficacy in AGA and BPH...
June 2016: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/26900409/bio-conjugation-of-antioxidant-peptide-on-surface-modified-gold-nanoparticles-a-novel-approach-to-enhance-the-radical-scavenging-property-in-cancer-cell
#2
Sushma Kalmodia, Suryanarayanan Vandhana, B R Tejaswini Rama, Balasubramanyam Jayashree, T Sreenivasan Seethalakshmi, Vetrivel Umashankar, Wenrong Yang, Colin J Barrow, Subramanian Krishnakumar, Sailaja V Elchuri
BACKGROUND: Functionalized gold nanoparticles are emerging as a promising nanocarrier for target specific delivery of the therapeutic molecules in a cancer cell, as a result it targeted selectively to the cancer cell and minimized the off-target effect. The functionalized nanomaterial (bio conjugate) brings novel functional properties, for example, the high payload of anticancer, antioxidant molecules and selective targeting of the cancer molecular markers. The current study reported the synthesis of multifunctional bioconjugate (GNPs-Pep-A) to target the cancer cell...
2016: Cancer Nanotechnology
https://www.readbyqxmd.com/read/26899808/further-evidence-of-thioctic-acid-%C3%AE-lipoic-acid-being-a-strong-cosmetic-sensitizer
#3
Julie Leysen, Olivier Aerts
No abstract text is available yet for this article.
March 2016: Contact Dermatitis
https://www.readbyqxmd.com/read/26683093/controlled-multi-functionalization-facilitates-targeted-delivery-of-nanoparticles-to-cancer-cells
#4
Manish S Hudlikar, Xiuru Li, Ivan A Gagarinov, Nagesh Kolishetti, Margreet A Wolfert, Geert-Jan Boons
A major objective of nanomedicine is to combine in a controlled manner multiple functional entities into a single nanoscale device to target particles with great spatial precision, thereby increasing the selectivity and potency of therapeutic drugs. A multifunctional nanoparticle is described for controlled conjugation of a cytotoxic drug, a cancer cell targeting ligand, and an imaging moiety. The approach is based on the chemical synthesis of polyethylene glycol that at one end is modified by a thioctic acid for controlled attachment to a gold core...
January 22, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/26358837/extremely-high-efficient-nanoreactor-with-au-zno-catalyst-for-photocatalysis
#5
Chung-Yi Su, Tung-Han Yang, Vitaly Gurylev, Sheng-Hsin Huang, Jenn-Ming Wu, Tsong-Pyng Perng
We fabricated a photocatalytic Au@ZnO@PC (polycarbonate) nanoreactor composed of monolayered Au nanoparticles chemisorbed on conformal ZnO nanochannel arrays within the PC membrane. A commercial PC membrane was used as the template for deposition of a ZnO shell into the pores by atomic layer deposition (ALD). Thioctic acid (TA) with sufficient steric stabilization was used as a molecular linker for functionalization of Au nanoparticles in a diameter of 10 nm. High coverage of Au nanoparticles anchored on the inner wall of ZnO nanochannels greatly improved the photocatalytic activity for degradation of Rhodamine B...
October 2, 2015: Nanotechnology
https://www.readbyqxmd.com/read/26303592/a-self-reporting-tetrazole-based-linker-for-the-biofunctionalization-of-gold-nanorods
#6
Lukas Stolzer, Antonina Vigovskaya, Christopher Barner-Kowollik, Ljiljana Fruk
A photochemical approach based on nitrile imine-mediated tetrazole-ene cycloaddition is introduced to functionalize gold nanorods with biomolecules. For this purpose, a bifunctional, photoreactive linker containing thioctic acid as the Au anchoring group and a tetrazole moiety for the light-induced reaction with maleimide-capped DNA was prepared. The tetrazole-based reaction on the nanoparticles' surface results in a fluorescent pyrazoline product allowing for the spectroscopic monitoring of the reaction. This first example of nitrile imine-mediated tetrazole-ene cycloaddition (NITEC)-mediated biofunctionalization of Au nanorods paves the way for the attachment of sensitive biomolecules, such as antibodies and other proteins, under mild conditions and expands the toolbox for the tailoring of nanomaterials...
October 5, 2015: Chemistry: a European Journal
https://www.readbyqxmd.com/read/26235578/effect-of-piperazine-dithioctate-on-the-oral-pharmacokinetics-of-glimepiride-in-rats
#7
Eun-Yeong Kim, Keewon Yu, Kyungmi Choi, Hyung Eun Yu, Soo Jin Oh, Kiho Lee
The objective of the present work was to investigate the potential for pharmacokinetic drug-drug interactions between glimepiride (GMP) and piperazine dithioctate (PDT) in rats to support the development of an orally combined product of the two drugs. An LC-MS/MS bioanalytical method was developed for simultaneous quantification of GMP and thioctic acid (TA) in rat plasma. The accuracy, precision, linearity, selectivity, and recovery were all within an acceptable range. The oral plasma exposure of the GMP solution was more than 14-times greater than that of the GMP suspension at a dose of 0...
2015: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/26207883/effect-of-treatment-with-the-antioxidant-alpha-lipoic-thioctic-acid-on-heart-and-kidney-microvasculature-in-spontaneously-hypertensive-rats
#8
Seyed Khosrow Tayebati, Daniele Tomassoni, Lorenzo Di Cesare Mannelli, Francesco Amenta
Endothelial cells represent an important vascular site of signaling and development of damage during ischemia, inflammation and other pathological conditions. Excessive reactive oxygen species production causes pathological activation of endothelium including exposure of cell to adhesion molecules. Intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1) and platelet-endothelial cell adhesion molecule-1 (PECAM-1) are members of the immunoglobulin super-family which are present on the surface of endothelial cells...
2016: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/26152878/scaffold-electrodes-based-on-thioctic-acid-capped-gold-nanoparticles-coordinated-alcohol-dehydrogenase-and-azure-a-films-for-high-performance-biosensor
#9
C Gómez-Anquela, T García-Mendiola, José M Abad, M Pita, F Pariente, E Lorenzo
Nanometric size gold nanoparticles capped with thiotic acid are used to coordinate with the Zn (II) present in the catalytic center of Alcohol Dehydrogenase (ADH). In combination with the NADH oxidation molecular catalyst Azure A, electrografted onto carbon screen-printed electrodes, they are used as scaffold electrodes for the construction of a very efficient ethanol biosensor. The final biosensing device exhibits a highly efficient ethanol oxidation with low overpotential of -0.25 V besides a very good analytical performance with a detection limit of 0...
December 2015: Bioelectrochemistry
https://www.readbyqxmd.com/read/25895246/-experience-of-antioxidants-in-combined-therapy-for-vibration-disease-patients
#10
V V Shilov, S M Nikonova, E L Lashina
The study proved important role of antioxidants in combined therapy for patients with vibration disease caused by general and local vibration. Findings are positive influence of thioctic acid on amelioration of pain and angiodystonia, supported by clinical and functional investigations.
2015: Meditsina Truda i Promyshlennaia Ekologiia
https://www.readbyqxmd.com/read/25716460/the-effect-of-thioctic-acid-on-allodynia-in-a-rat-vincristine-induced-neuropathy-model
#11
Jimin Kahng, Tae Kwan Kim, Eun Yong Chung, Yee Suk Kim, Jeong Yeon Moon
OBJECTIVE: To investigate the antiallodynic effects of thioctic acid in vincristine-induced neuropathy in rats. METHODS: Neuropathy was induced in Sprague-Dawley rats via vincristine intraperitoneal injection. After 15 days, rats were investigated for the presence of mechanical and cold allodynia, and those with allodynia received intraperitoneal injection with normal saline or 1, 5, or 10 mg/kg thioctic acid. Mechanical and cold allodynia were assessed before treatment and at 15, 30, 60, 90, 150 and 180 min after treatment...
June 2015: Journal of International Medical Research
https://www.readbyqxmd.com/read/25381809/efficacy-of-%C3%AE-lipoic-acid-in-diabetic-neuropathy
#12
REVIEW
Nikolaos Papanas, Dan Ziegler
INTRODUCTION: Neuropathy is a serious complication of diabetes. Its management focuses on glycaemic control, multifactorial cardiovascular risk intervention, pathogenesis-oriented therapy, and analgesics where needed. AREAS COVERED: The objective of this review is assessment of efficacy and safety of α lipoic acid (ALA, also thioctic acid) in pathogenesis-oriented treatment of diabetic neuropathy. The mechanisms of action of ALA in experimental diabetic neuropathy include reduction of oxidative stress along with improvement in nerve blood flow, nerve conduction velocity, and several other measures of nerve function...
December 2014: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/25345429/pharmacokinetic-evaluation-of-a-newly-developed-piperazine-dithioctate-formulation-in-healthy-volunteers
#13
Renhua Zheng, Hyung Ho Song, Young Ee Kwon, Bo-Hyung Kim
BACKGROUND: The formulation investigated as reference contains thioctic acid which is known to be poorly soluble in water and have some instability during storage at high temperature. To overcome these limitations, a new piperazine dithioctate (PDT) tablet formulation was developed by a domestic pharmaceutical company in Korea. OBJECTIVE: The aim of this clinical study was to evaluate the pharmacokinetic characteristics of PDT in healthy volunteers. METHODS: This study consisted of two clinical trials...
December 2014: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/25319102/reduction-responsive-crosslinked-micellar-nanoassemblies-for-tumor-targeted-drug-delivery
#14
Wei Fan, Yingzhe Wang, Xin Dai, Lei Shi, DeAngelo Mckinley, Chalet Tan
PURPOSE: The purpose of the study was to devise and evaluate crosslinked nanoassemblies to achieve enhanced drug delivery to tumors. METHODS: A novel copolymer comprised of polyethylene glycol 5000 (PEG114), Vitamin E (VE) and thioctic acid (TA) with a molar ratio of PEG114:VE:TA at 1:4:4 was synthesized. The resulting PEG114-VE4-TA4 copolymer self-assembled into micelles, which formed polydisulfide crosslinks catalyzed by dithiothreitol. Employing paclitaxel as a model drug, the crosslinked PEG114-VE4-TA4 micelles were characterized for the physicochemical and biological properties...
April 2015: Pharmaceutical Research
https://www.readbyqxmd.com/read/25311963/controlled-co-delivery-nanocarriers-based-on-mixed-micelles-formed-from-cyclodextrin-conjugated-and-cross-linked-copolymers
#15
Shuai Li, Qin He, Tianchan Chen, Wei Wu, Kening Lang, Zhong-Ming Li, Jianshu Li
The combination of multiple drugs within a single nanocarrier can provide significant advantages for disease therapy and it is desirable to introduce a second drug based on host-guest interaction in these co-delivery systems. In this study, a core-stabilized mixed micellar system consisting of β-cyclodextrin-conjugated poly(lactic acid)-b-poly(ethylene glycol) (β-CD-PLA-mPEG) and DL-Thioctic acid (TA) terminated PLA-mPEG (TA-PLA-mPEG) was developed for the co-delivery of DOX and fluorescein isothiocyanate labeled adamantane (FA)...
November 1, 2014: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/25148611/a-novel-drug-delivery-system-of-gold-nanorods-with-doxorubicin-and-study-of-drug-release-by-single-molecule-spectroscopy
#16
Agha Zeeshan Mirza
The work presented here describes the fabrication of a novel drug delivery system, which consists of gold nanorods and doxorubicin, with the attachment of thioctic acid and folic acid, for the targeted release of drug to cancer cells. Doxorubicin, the potent anticancer drug, is widely used to treat various cancers. Gold nanorods were functionalized chemically to generate active groups for the attachment of drug molecules and subsequently attached to folic acid. The resulting nanostructure was characterized by UV-visible-NIR spectrophotometry, TEM techniques, zeta potential measurement and subsequently used to target folate receptor-expressing cancers cells for the delivery of doxorubicin...
January 2015: Journal of Drug Targeting
https://www.readbyqxmd.com/read/25045890/thioctic-acid-derivatives-as-building-blocks-to-incorporate-dna-oligonucleotides-onto-gold-nanoparticles
#17
Sónia Pérez-Rentero, Santiago Grijalvo, Guillem Peñuelas, Carme Fàbrega, Ramon Eritja
Oligonucleotide gold nanoparticle conjugates are being used as diagnostic tools and gene silencing experiments. Thiol-chemistry is mostly used to functionalize gold nanoparticles with oligonucleotides and to incorporate DNA or RNA molecules onto gold surfaces. However, the stability of such nucleic acid-gold nanoparticle conjugates in certain conditions may be a limitation due to premature break of the thiol-gold bonds followed by aggregation processes. Here, we describe a straightforward synthesis of oligonucleotides carrying thioctic acid moiety based on the use of several thioctic acid-L-threoninol derivatives containing different spacers, including triglycine, short polyethyleneglycol, or aliphatic spacers...
2014: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/25019614/self-assembled-monolayers-of-thiols-adsorbed-on-au-zno-functionalized-silica-nanosprings-photoelectron-spectroscopy-analysis-and-detection-of-vaporized-explosives
#18
Blaise-Alexis Fouetio Kengne, Saswata Karmakar, Mamta Kaura, V V R Sai, Giancarlo Corti, Ishwar B Niraula, Alexander Larin, Jessica Hall, Dewayne Sowell, Patrick J Hrdlicka, Vladimir Dobrokhotov, David N McIlroy
Self-assembled monolayers (SAMs) of thiols of L-cysteine, 6-mercaptohexanol, 4-mercaptobenzoic acid, DL-thioctic acid and 11-(1-pyrenyl)-1-undecathiol, which have been selected for their propensity to interact with vaporized explosives, have been attached from solution onto gold decorated ZnO-coated nanosprings. X-ray and ultraviolet photoelectron spectroscopies (XPS and UPS) have been used to investigate the surface electronic structure of the SAMs coated nanosprings. On the basis of XPS analysis, it has been determined that the packing densities of L-cysteine, 6-mercaptohexanol, 4-mercaptobenzoic acid, DL-thioctic acid and 11-(1-pyrenyl)-1-undecathiol on gold (zinc oxide) are 5...
August 27, 2014: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/24908976/-oxidative-stress-and-antioxidant-therapy-with-alpha-lipoic-acid-inclusion-in-acute-poisoning-by-herbicide-based-on-2-4-dichlorphenoxyacetic-acid
#19
O A Kharchenko, H M Balan, N N Bubalo, T V Mymrenko
In patients with acute poisoning amine salt herbicide 2,4-D develops oxidative stress with simultaneous inhibition of intracellular and extracellular antioxidant factors. These changes are more pronounced with neurological disorders that occur in conjunction with a toxic damage of liver or heart. The inclusion of a comprehensive detoxification therapy alpha-lipoic acid not only promotes a more pronounced therapeutic effect but also an earlier recourse cytolytic syndrome, a marked recovery of levels of malondialdehyde and indices of antioxidant system (superoxide dismutase and ceruloplasmin) than for patients in the comparison group...
January 2014: Likars'ka Sprava
https://www.readbyqxmd.com/read/24899095/synergic-effect-of-exercise-and-lipoic-acid-on-protection-against-kainic-acid-induced-seizure-activity-and-oxidative-stress-in-mice
#20
Hee-jae Kim, Wook Song, Jin-Soo Kim, Eun Hee Jin, Moon-Seok Kwon, Sok Park
Anti-convulsant effects of physical exercise and lipoic acid (LA), also referred to as thioctic acid with antioxidant activity, were investigated using chemical induced seizure model. We investigated the synergic effect of physical exercise and LA on kainic acid-induced seizure activity caused by oxidative stress. After 8 weeks of swimming training, body weight decreased and endurance capacity increased significantly compared to sedentary mice. Kainic acid (30 mg/kg, i.p.) evoked seizure activity 5 min after injection, and seizure activity peaked approximately 80 min after kainic acid treatment...
August 2014: Neurochemical Research
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