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https://www.readbyqxmd.com/read/29475009/effects-of-lipoic-acid-and-n-3-long-chain-polyunsaturated-fatty-acid-on-the-liver-ovariectomized-rat-model-of-menopause
#1
Ártur Krumberg Schüller, Diego Antonio Mena Canata, Fernanda Schäfer Hackenhaar, Vanessa Krüger Engers, Fernanda Maciel Heemann, Jordana Salete Putti, Tiago Boeira Salomon, Mara Silveira Benfato
BACKGROUND: Bilateral ovariectomy is an experimental model used to analyse the effects of menopause and develop strategies to mitigate the deleterious effects of this condition. Supplementation of the diet with antioxidants has been used to reduce potential oxidative stress caused by menopause. The purpose of the study was to analyse the effects of α-lipoic acid (LA), docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), dietary supplementation on oxidative stress in the livers of ovariectomized rats...
October 19, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29466087/rat-hippocampal-ca3-neuronal-injury-induced-by-limb-ischemia-reperfusion-a-possible-restorative-effect-of-alpha-lipoic-acid
#2
Ola A Hussein, Amel M M Abdel-Hafez, Ayat Abd El Kareim
Limb ischemia reperfusion (I/R) injury is associated with serious local and systemic effects. Reperfusion may augment tissue injury in excess of that produced by ischemia alone. The hippocampus has been reported to be vulnerable to I/R injury. Alpha lipoic acid (ALA) is an endogenous antioxidant with a powerful antioxidative, anti-inflammatory, and antiapoptotic properties. We studied the probable restorative effect of ALA on limb I/R-induced structural damage of rat hippocampus. Forty adult male albino rats were divided equally into four groups: group I (sham); group II (I/R-1 day) has undergone bilateral femoral arteries occlusion (3 h), then reperfusion for 1 day; group III (I/R-7 days) has undergone reperfusion for seven days; group IV (I/R-ALA) has undergone I/R as group III and received an intraperitoneal injection of ALA (100 mg/kg) for 7 days...
March 2018: Ultrastructural Pathology
https://www.readbyqxmd.com/read/29460914/-alpha-lipoic-acid-in-the-treatment-of-diabetic-polyneuropathy
#3
E I Chukanova, A S Chukanova
The issues of classification, pathogenesis, pathomorphology and treatment of diabetic polyneuropathy (DPN) are addressed. Pathogenetic mechanisms of the action of alpha-lipoic acid in treatment of DPN are justified. The authors present the results of randomized placebo-controlled trials of alpha-lipoic acid that revealed the high clinical efficacy and absence of side-effects even during the long-term treatment.
2018: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/29454011/comparative-study-on-some-oxidative-stress-parameters-in-blood-of-vitiligo-patients-before-and-after-combined-therapy
#4
A Zheleva, G Nikolova, Y Karamalakova, E Hristakieva, R Lavcheva, V Gadjeva
Currently accepted that oxidative stress is a triggering event in the melanocytic destruction and is probably involved in the etiopathogenesis of vitiligo disease. Despite numerous investigations, contradictory results were reported about the levels of oxidative stress biomarkers measured in the skin and blood of vitiligo patients. By Electron Paramagnetic Resonance spectroscopy (EPR) and spectrophotometry, we have investigated and compared some oxidative stress biomarkers in the blood of vitiligo patients' before and after UVB Narrow Band 311 nm phototherapy combined with the antioxidant nutritional supplement containing - Vitamin C, Vitamin B1, L -Cysteine, Lipoic Acid, and polyunsaturated fatty acids...
February 14, 2018: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29436603/%C3%AE-%C3%A2-lipoic-acid-can-greatly-alleviate-the-toxic-effect-of-ages-on-sh%C3%A2-sy5y-cells
#5
Guifen Niu, Jianfei Guo, Yaqiang Tian, Kexiang Zhao, Jian Li, Qian Xiao
The aim of the study was to explore the influence of α‑lipoic acid (α‑LA) on the cytotoxicity of advanced glycation end‑products (AGEs) against SH‑SY5Y cells. AGE‑bovine serum albumin (BSA) was incubated in vitro using SH‑SY5Y cells as a target model, and the control group was set. Cells were exposed to AGE‑BSA, and α‑LA was selectively added to the cells. Cell growth and death was determined by the MTT assay, which measures cellular metabolic rate, lactate dehydrogenase (LDH) leakage rate and cellular axonal length...
February 8, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29434038/poldip2-is-an-oxygen-sensitive-protein-that-controls-pdh-and-%C3%AE-kgdh-lipoylation-and-activation-to-support-metabolic-adaptation-in-hypoxia-and-cancer
#6
Felipe Paredes, Kely Sheldon, Bernard Lassègue, Holly C Williams, Elizabeth A Faidley, Gloria A Benavides, Gloria Torres, Fernanda Sanhueza-Olivares, Samantha M Yeligar, Kathy K Griendling, Victor Darley-Usmar, Alejandra San Martin
Although the addition of the prosthetic group lipoate is essential to the activity of critical mitochondrial catabolic enzymes, its regulation is unknown. Here, we show that lipoylation of the pyruvate dehydrogenase and α-ketoglutarate dehydrogenase (αKDH) complexes is a dynamically regulated process that is inhibited under hypoxia and in cancer cells to restrain mitochondrial respiration. Mechanistically, we found that the polymerase-δ interacting protein 2 (Poldip2), a nuclear-encoded mitochondrial protein of unknown function, controls the lipoylation of the pyruvate and α-KDH dihydrolipoamide acetyltransferase subunits by a mechanism that involves regulation of the caseinolytic peptidase (Clp)-protease complex and degradation of the lipoate-activating enzyme Ac-CoA synthetase medium-chain family member 1 (ACSM1)...
February 6, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29433856/studying-anti-oxidative-properties-of-inclusion-complexes-of-%C3%AE-lipoic-acid-with-%C3%AE-cyclodextrin-in-single-living-fission-yeast-by-confocal-raman-microspectroscopy
#7
Hemanth Noothalapati, Ryo Ikarashi, Keita Iwasaki, Tatsuro Nishida, Tomohiro Kaino, Keisuke Yoshikiyo, Keiji Terao, Daisuke Nakata, Naoko Ikuta, Masahiro Ando, Hiro-O Hamaguchi, Makoto Kawamukai, Tatsuyuki Yamamoto
α-lipoic acid (ALA) is an essential cofactor for many enzyme complexes in aerobic metabolism, especially in mitochondria of eukaryotic cells where respiration takes place. It also has excellent anti-oxidative properties. The acid has two stereo-isomers, R- and S- lipoic acid (R-LA and S-LA), but only the R-LA has biological significance and is exclusively produced in our body. A mutant strain of fission yeast, Δdps1, cannot synthesize coenzyme Q10, which is essential during yeast respiration, leading to oxidative stress...
February 6, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29432779/the-protective-effect-of-alpha-lipoic-acid-against-brain-ischemia-and-reperfusion-injury-via-mtor-signaling-pathway-in-rats
#8
Xinjie Gao, Wei Chen, Jinquan Li, Chao Shen, Ping Zhou, Xiaoming Che, Xiaomu Li, Rong Xie
Alpha-lipoic Acid(ALA), an endogenous short-chain fatty acid, has been found inducing a protective effect against ischemia and reperfusion(I/R) injury. Recently, mTOR signaling pathway has been proved to involve in the mechanism of I/R injury. In our previous study, we determined that ALA could protect cerebral endothelial cells against I/R injury via mTOR signaling pathway. However, whether ALA can protect against brain I/R injury in vivo and its mechanisms is uncertain. In this study, we try to explore if the ALA treatment can protect against brain I/R injury and confirm the relationship between ALA and mTOR signaling pathway...
February 9, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29429516/lipoic-acid-inhibited-desflurane-induced-hippocampal-neuronal-apoptosis-through-caspase3-and-nf-kappab-dependent-pathway
#9
Hui Zhao, Meimei Bu, Binglu Li, Yong Zhang
Desfluraneis a widely-used general anesthetics. However, recent reports showed its significant side effect in the nervous system. Desflurane could lead to the neuronal death and affect the working memory. Unfortunately, the mechanism underlying the action of desflurane is still not clear and there is still no potent medicine to prevent the lesion in the central nervous system caused by general anesthetics. In this study, we found α-lipoic acid, an antioxidant exerting protective effect on multiple cells tissues, could resist the neurotoxicity caused by desflurane exposure...
February 2018: Tissue & Cell
https://www.readbyqxmd.com/read/29428930/managing-hashimoto-s-thyroiditis-through-personalized-care-a-case-report
#10
Keren Dolan, Heather Finley, Margo Gasta, Sasha Houseman
Hashimoto's thyroiditis (HT) affects more than 14 million individuals in the United States, most of them women. Thyroid replacement therapy has long been the foundation of medical treatment for HT; however, recent research supports a role for nutritional approaches. This case report describes the management of a 34-y-old female with HT who declined thyroid replacement therapy and was successfully managed for a period of 5 mo. The patient was advised to follow a phytonutrient rich diet (eg, berries); avoid sensitive foods (gluten and soy); and consume quality fats, fermented foods, and filtered water...
February 10, 2018: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/29428928/new-concepts-of-chronic-pain-and-the-potential-role-of-complementary-therapies
#11
Ken Wojcikowski, Vanessa J Vigar, Christopher J Oliver
Context • The mechanisms of chronic pain involve complex neuroplastic changes at all 3 orders of neurons involved in the transmission of pain as well as changes in the descending inhibitory pathway. Although traditional pharmaceutical therapies have some efficacy, substantial scope exists for a new model of individualized therapy, tailored to the specific response of each patient. Because changes occur at all levels of the pain pathway, successful treatment may require a combination of therapies with different mechanisms of action...
March 10, 2018: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/29427700/new-arguments-for-beneficial-effects-of-alpha-lipoic-acid-on-the-cardiovascular-system-in-the-course-of-type-2-diabetes
#12
Marzena Dworacka, Galina Chukanova, Saule Iskakova, Yergen Kurmambayev, Anna Wesołowska, Bartosz A Frycz, Paweł P Jagodziński, Grzegorz Dworacki
PURPOSE: Alpha-lipoic acid (ALA), widely known as an antioxidant, modifies also serum levels of angiogenic factors in type 2 diabetic patients. These pharmacological activities may influence the status of the cardiovascular system. Taking into consideration that diabetes is related to the increased cardiovascular risk we investigated several effects of ALA on angiogenic factors in the myocardium and in the aortal wall using a rat model of type 2 diabetes. METHODS: Diabetes was induced in Wistar rats by a fat-rich diet and by intraperitoneal injection of a small dose of streptozotocin (30 mg/kg)...
February 7, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29427527/ubc-nepal-expedition-the-use-of-oral-antioxidants-does-not-alter-cerebrovascular-function-at-sea-level-or-high-altitude
#13
Alex B Hansen, Ryan L Hoiland, Nia C S Lewis, Michael M Tymko, Joshua C Tremblay, Michael Stembridge, Daniela Nowak-Flück, Howard H Carter, Damian M Bailey, Philip N Ainslie
Hypoxia is associated with an increased systemic and cerebral formation of free radicals and associated reactants that may be linked to impaired cerebral vascular function a neurological sequela. To what extent oral antioxidants prophylaxis impacts cerebrovascular function in humans throughout the course of acclimatization to the hypoxia of terrestrial high-altitude has not been examined. Thus, the purpose of the current study was to examine the influence of orally ingested antioxidants at clinically relevant doses (vitamin C, E, and alpha-lipoic acid) on cerebrovascular regulation at sea-level (344 m; n = 12; female n = 2 participants), and at high altitude (5050 m; n = 9; female n = 2), in a randomized, placebo-controlled, and double-blinded crossover design...
February 10, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29419812/attenuation-of-glucose-induced-myoglobin-glycation-and-the-formation-of-advanced-glycation-end-products-ages-by-r-%C3%AE-lipoic-acid-in-vitro
#14
Hardik Ghelani, Valentina Razmovski-Naumovski, Rajeswara Rao Pragada, Srinivas Nammi
High-carbohydrate containing diets have become a precursor to glucose-mediated protein glycation which has been linked to an increase in diabetic and cardiovascular complications. The aim of the present study was to evaluate the protective effect of (R)-α-lipoic acid (ALA) against glucose-induced myoglobin glycation and the formation of advanced glycation end products (AGEs) in vitro. METHODS: The effect of ALA on myoglobin glycation was determined via the formation of AGEs fluorescence intensity, iron released from the heme moiety of myoglobin and the level of fructosamine...
February 8, 2018: Biomolecules
https://www.readbyqxmd.com/read/29419686/the-clinical-efficacy-of-epalrestat-combined-with-%C3%AE-lipoic-acid-in-diabetic-peripheral-neuropathy-protocol-for-a-systematic-review-and-meta-analysis
#15
Xiaotong Wang, Haixiong Lin, Shuai Xu, Yuanlin Jin, Ren Zhang
BACKGROUND: Diabetic peripheral neuropathy (DPN) is a common long-term complication of diabetes mellitus, affecting patients in the world. Epalrestat combined with α-lipoic acid (ALA) is the most frequent combine therapy used in the DPN researches. We aim to assess the effectiveness and safety of epalrestat combined with ALA in patients with DPN, compare with epalrestat alone. METHODS: We will search Cochrane Library, PubMed, Wanfang Data, China National Knowledge Infrastructure, VIP Chinese Science and Technology Journals Database, and Chinese Biomedical Database from inception until October 31th, 2017...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29409741/lipoic-acid-metabolism-in-trypanosoma-cruzi-as-putative-target-for-chemotherapy
#16
Paola Vacchina, Daniel A Lambruschi, Antonio D Uttaro
Lipoic acid (LA) is a cofactor of relevant enzymatic complexes including the glycine cleave system and 2-ketoacid dehydrogenases. Intervention on LA de novo synthesis or salvage could have pleiotropic deleterious effect in cells, making both pathways attractive for chemotherapy. We show that Trypanosoma cruzi was susceptible to treatment with LA analogues. 8-Bromo-octanic acid (BrO) inhibited the growth of epimastigote forms of both Dm28c and CL Brener strains, although only at high (chemotherapeutically irrelevant) concentrations...
February 1, 2018: Experimental Parasitology
https://www.readbyqxmd.com/read/29405010/site-specific-protein-labeling-utilizing-lipoic-acid-ligase-lpla-and-bioorthogonal-inverse-electron-demand-diels-alder-reaction
#17
Mathis Baalmann, Marcel Best, Richard Wombacher
Here, we describe a two-step protocol for selective protein labeling based on enzyme-mediated peptide labeling utilizing lipoic acid ligase (LplA) and bioorthogonal chemistry. The method can be applied to purified proteins, protein in cell lysates, as well as living cells. In a first step a W37V mutant of the lipoic acid ligase (LplAW37V) from Escherichia coli is utilized to ligate a synthetic chemical handle site-specifically to a lysine residue in a 13 amino acid peptide motif-a short sequence that can be genetically expressed as a fusion with any protein of interest...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29367960/photochemical-transformation-of-lipoic-acid-based-ligands-probing-the-effects-of-solvent-ligand-structure-oxygen-and-ph
#18
Dinesh Mishra, Sisi Wang, Serge Michel, Goutam Palui, Naiqian Zhan, Woody Perng, Zhicheng Jin, Hedi Mattoussi
We have combined optical absorption with the Ellman's test to identify the parameters that affect the transformation of the 5-membered dithiolanes to thiols in lipoic acid (LA) and its derivatives during UV-irradiation. We found that the nature and polarity of the solvent, the structure of the ligands, acidity of the medium and oxygen can drastically affect the amount of photogenerated thiols. These findings are highly relevant to the understanding of the photochemical transformation of this biologically relevant compound, and would benefit the increasing use of LA-based ligands for the surface functionalization of various nanomaterials...
January 25, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29366899/inulin-based-glutathione-responsive-delivery-system-for-colon-cancer-treatment
#19
Dongdong Wang, Feifei Sun, Chunbo Lu, Peng Chen, Zhaojie Wang, Yuanhao Qiu, Haibo Mu, Zehong Miao, Jinyou Duan
Colorectal cancer is one of the most common types of tumor in the world. Here we developed a lipoic acid esterified polysaccharide (inulin) delivery system for tanshinone IIA to treat colorectal cancer in vitro. The release of tanshinone IIA in the system was highly responsive to glutathione, which is commonly abundant in cancer cells. In addition, this drug delivery system was proliferative to Bifidobacterium longum, the common inhabitant of human intestine. Thus, this strategy might be useful to improve colon cancer therapy efficacy of anticancer drugs and meanwhile promote the growth of beneficial commensal flora in the gut...
January 20, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29366000/effect-of-alpha-lipoic-acid-supplementation-on-oxidative-stress-markers-and-antioxidative-defense-in-patients-with-diabetic-neuropathy
#20
Ferenc Sztanek, Ildiko Seres, Hajnalka Lorincz, Agnes Molnar, Gyorgy Paragh
No abstract text is available yet for this article.
August 2017: Atherosclerosis
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