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Šachlevičiūtė U, Gonzalez G, Kvasnicová M, Štěpánková Š, Kleizienė N, Bieliauskas A, Zatloukal M, Strnad M, Sløk FA, Kvasnica M, Šačkus A, Žukauskaitė A. Synthesis and neuroprotective activity of 3-aryl-3-azetidinyl acetic acid methyl ester derivatives. Arch Pharm (Weinheim) 2023; 356:e2300378. [PMID: 37797174 DOI: 10.1002/ardp.202300378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 10/07/2023]
Abstract
A library of 3-aryl-3-azetidinyl acetic acid methyl ester derivatives was prepared from N-Boc-3-azetidinone employing the Horner-Wadsworth-Emmons reaction, rhodium(I)-catalyzed conjugate addition of arylboronic acids, and subsequent elaborations to obtain N-unprotected hydrochlorides, N-alkylated and N-acylated azetidine derivatives. The compounds were evaluated for acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activity, revealing several derivatives to possess AChE inhibition comparable to that of the AChE inhibitor rivastigmine. The binding mode of the AChE inhibitor donepezil and selected active compounds 26 and 27 within the active site of AChE was studied using molecular docking. Furthermore, the neuroprotective activity of the prepared compounds was evaluated in models associated with Parkinson's disease (salsolinol-induced) and aspects of Alzheimer's disease (glutamate-induced oxidative damage). Compound 28 showed the highest neuroprotective effect in both salsolinol- and glutamate-induced neurodegeneration models, and its protective effect in the glutamate model was revealed to be driven by a reduction in oxidative stress and caspase-3/7 activity.
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Affiliation(s)
- Urtė Šachlevičiūtė
- Institute of Synthetic Chemistry, Kaunas University of Technology, Kaunas, Lithuania
| | - Gabriel Gonzalez
- Department of Experimental Biology, Faculty of Science, Palacký University Olomouc, Olomouc, Czech Republic
- Department of Neurology, University Hospital Olomouc and Faculty of Medicine and Dentistry, Palacký University Olomouc, Olomouc, Czech Republic
| | - Marie Kvasnicová
- Department of Experimental Biology, Faculty of Science, Palacký University Olomouc, Olomouc, Czech Republic
| | - Šárka Štěpánková
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic
| | - Neringa Kleizienė
- Institute of Synthetic Chemistry, Kaunas University of Technology, Kaunas, Lithuania
| | - Aurimas Bieliauskas
- Institute of Synthetic Chemistry, Kaunas University of Technology, Kaunas, Lithuania
| | - Marek Zatloukal
- Department of Chemical Biology, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | - Miroslav Strnad
- Laboratory of Growth Regulators, Institute of Experimental Botany of the Czech Academy of Sciences & Palacký University, Olomouc, Czech Republic
| | | | - Miroslav Kvasnica
- Laboratory of Growth Regulators, Institute of Experimental Botany of the Czech Academy of Sciences & Palacký University, Olomouc, Czech Republic
| | - Algirdas Šačkus
- Institute of Synthetic Chemistry, Kaunas University of Technology, Kaunas, Lithuania
| | - Asta Žukauskaitė
- Department of Chemical Biology, Faculty of Science, Palacký University, Olomouc, Czech Republic
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Banik S, Ghosh A, Sato H, Onoue S. The efficacy of alpha-lipoic acid in the management of burning mouth syndrome: An updated systematic review of randomized controlled clinical trials. Health Sci Rep 2023; 6:e1186. [PMID: 37021013 PMCID: PMC10069235 DOI: 10.1002/hsr2.1186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 03/03/2023] [Accepted: 03/14/2023] [Indexed: 04/05/2023] Open
Abstract
Background and Aims Burning mouth syndrome (BMS) causes burning or uncomfortable feelings in the oral cavity without any obvious injuries. This condition's etiopathogenesis is still unknown, consequently, BMS management is very challenging. Alpha-lipoic acid (ALA) is a naturally occurring potent bioactive compound that has been found to be useful in the management of BMS in many studies. Therefore, we conducted a comprehensive systematic review to investigate the usefulness of ALA in the management of BMS based on randomized controlled trials (RCTs). Methods Different electronic databases, including PubMed, Scopus, Embase, Web of Science, and Google Scholar, were extensively searched to find relevant studies. Results This study included nine RCTs that matched the inclusion criteria. In most studies, ALA was given at a dose of 600-800 mg/day, with up to two months of follow-up. The majority of studies (six out of nine studies) indicated that ALA was more effective in BMS patients than in the placebo-controlled group. Conclusions This comprehensive systematic review provides evidence of the positive outcomes of the treatment of BMS with ALA. However, more research might be needed before ALA can be considered the first-line therapy for BMS.
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Affiliation(s)
- Sujan Banik
- Department of Pharmacy, Faculty of ScienceNoakhali Science and Technology UniversityNoakhaliBangladesh
- Laboratory of Biopharmacy, School of Pharmaceutical SciencesUniversity of ShizuokaShizuokaJapan
| | - Antara Ghosh
- Laboratory of Biopharmacy, School of Pharmaceutical SciencesUniversity of ShizuokaShizuokaJapan
| | - Hideyuki Sato
- Laboratory of Biopharmacy, School of Pharmaceutical SciencesUniversity of ShizuokaShizuokaJapan
| | - Satomi Onoue
- Laboratory of Biopharmacy, School of Pharmaceutical SciencesUniversity of ShizuokaShizuokaJapan
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DMF-Activated Nrf2 Ameliorates Palmitic Acid Toxicity While Potentiates Ferroptosis Mediated Cell Death: Protective Role of the NO-Donor S-Nitroso-N-Acetylcysteine. Antioxidants (Basel) 2023; 12:antiox12020512. [PMID: 36830070 PMCID: PMC9952671 DOI: 10.3390/antiox12020512] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/13/2023] [Accepted: 02/14/2023] [Indexed: 02/22/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is the most prevalent chronic liver disease that can develop into an aggressive form called nonalcoholic steatohepatitis (NASH), which ultimately progresses to cirrhosis, hepatocellular carcinoma (HCC), and end-stage liver failure. Currently, the deterioration of NAFLD is attributed to specific lipid toxicity which could be due to lipotoxicity and/or ferroptosis. In the current study, we evaluated the involvement of the nuclear factor erythroid 2 (NFE2)-related factor 2 (Nrf-2), which is a main activator of phase II metabolism in the two types of lipid-induced toxicity in hepatocytes, lipotoxicity by saturated fatty acids, and in ferroptosis, and the effect of NO donor treatment. AML12 cells were exposed to 600 μM palmitic acid to induce lipotoxicity or treated with 20 μM erastin or 5 μM RSL3 for ferroptosis. In SFA-lipotoxicity, pretreatment with the Nrf2 activator dimethyl fumarate (DMF) managed to ameliorate the cells and the oxidative stress level while aggravating ferroptosis due to emptying the thiol pool. On the other hand, the nitric oxide (NO)-donor, S-nitroso-N-acetylcysteine (NAC-SNO) proved to be effective in the prevention of hepatocytes ferroptosis.
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Christy J, Noorani S, Sy F, Al-Eryani K, Enciso R. Efficacy of alpha-lipoic acid in patients with burning mouth syndrome compared to that of placebo or other interventions: a systematic review with meta-analyses. J Dent Anesth Pain Med 2022; 22:323-338. [PMID: 36246031 PMCID: PMC9536947 DOI: 10.17245/jdapm.2022.22.5.323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/26/2022] [Accepted: 08/31/2022] [Indexed: 11/15/2022] Open
Abstract
Burning mouth syndrome (BMS) is a chronic oral disorder of unknown etiology which presents therapeutic challenges. Alpha-lipoic acid (ALA) has been studied as a potential treatment for BMS. The objective of this systematic review and meta-analysis was to evaluate the effectiveness of ALA compared to that of placebo or other interventions in individuals with BMS. Randomized controlled trials (RCT) using ALA to treat BMS were identified from MEDLINE, Cochrane Library, EMBASE, and Web of Science up to February 3, 2021. The assessment of the risk of bias in the included studies was based on the Cochrane guidelines. The primary outcome evaluated was the visual analog scale (VAS) pain intensity. ALA was compared with placebo, clonazepam, gabapentin, pregabalin, ALA plus gabapentin, capsaicin, Biotène®, and laser therapy. Altogether, 137 records were scanned for inclusion/exclusion, and nine RCTs (two unclear and seven at high risk of bias) were included in the qualitative and quantitative analyses, with a total of 594 patients with BMS included in this review. All studies reported an improvement in VAS pain scores ranging from -0.72 to -2.77. Meta-analysis results showed a non-significant reduction in pain intensity for ALA (P = 0.616) compared to that of placebo on a VAS of 0-10. Patients taking ALA were 1.923 times more likely to show an improvement in self-reported BMS symptoms (P = 0.031) than those in the placebo group. Clonazepam and pregabalin showed a significant VAS pain reduction of 4.08 and 4.68 (P < 0.001), respectively, compared to that with ALA. Although ALA intervention provided a non-significant improvement in the pain score and was more likely to produce a reduction in BMS symptoms, the evidence was of low quality. Further research is needed to establish clear guidelines for the use of ALA for BMS treatment.
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Affiliation(s)
- Jessica Christy
- Master of Science Program in Orofacial Pain and Oral Medicine, Herman Ostrow School of Dentistry of University of Southern California, Los Angeles, California, USA
| | - Salman Noorani
- Master of Science Program in Orofacial Pain and Oral Medicine, Herman Ostrow School of Dentistry of University of Southern California, Los Angeles, California, USA
| | - Frank Sy
- Master of Science Program in Orofacial Pain and Oral Medicine, Herman Ostrow School of Dentistry of University of Southern California, Los Angeles, California, USA
| | - Kamal Al-Eryani
- Clinical Dentistry, Herman Ostrow School of Dentistry of University of Southern California, Los Angeles, California, USA
| | - Reyes Enciso
- Department of Geriatrics, Special Needs and Behavioral Sciences, Herman Ostrow School of Dentistry of University of Southern California, Los Angeles, California, USA
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Liu Q, Li W, Zhang J, Zhao L, Ji C, Zhang J, Huang S, Ma Q. Lipoamide Alleviates Oxidized Fish Oil-Induced Host Inflammatory Response and Oxidative Damage in the Oviduct of Laying Hens. Front Vet Sci 2022; 9:875769. [PMID: 35498723 PMCID: PMC9040665 DOI: 10.3389/fvets.2022.875769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 03/03/2022] [Indexed: 11/13/2022] Open
Abstract
Fish oil (FO) is an important source of lipid in functional food and aquafeeds. However, the harmful effects of oxidized fish oil (OFO) on host metabolism and reproductive health are not yet clear. In addition, lipoamide (LAM) has been widely studied as an agent for alleviating various diseases associated with oxidative disruption. Therefore, in the current study, to investigate the effects of LAM in alleviating OFO-induced decline in reproductive performance and oxidative damage to the oviduct in laying hens. We constructed a 1% fresh FO model, a 1% OFO model, and a LAM model with 1% OFO (OFO + LAM) added at 100 mg/kg to explore the antioxidant effect of LAM. Herein, these results were evaluated by breeding performance, immune responses, estrogen, and antioxidant indices of serum samples, as well as the number of follicles and antioxidant parameters of oviducts. From the results, compared with the FO group, OFO significantly decreased the egg-laying rate, increased the contents of total protein (TP) and inflammatory factors [tumor necrosis factor α (TNF-α), interleukin (IL)-6, IL-8, and interferon γ (INF-γ)], and reduced the concentrations of anti-oxidation [total antioxidant (T-AOC), total superoxide dismutase (T-SOD), glutathione peroxidase (GSH-Px), glutathione (GSH), glutathione reductase (GR), catalase (CAT), and hydroxyl radical scavenging activity (HRSA)] in serum samples, as well as reduced the levels of anti-oxidation indexes in oviduct tissues (p < 0.05). Of note, the supplementation of LAM could significantly increase the laying performance, improve the levels of serum immunoglobulins (IgA, IgG, and IgM), serum estrogen [progesterone (P) and estradiol (E2)], and serum antioxidant parameters (T-AOC, T-SOD, GSH-Px, GSH, GR, CAT, and HRSA) and decrease the concentrations of serum inflammatory cytokines (TNF-α, IL-6, IL-8, and INF-γ) in laying hens following OFO administration (p < 0.05). In addition, LAM could dramatically increase the contents of antioxidant factors (p < 0.05) in oviducts and enhance the secretion capacity of the uterine part. Taken together, OFO caused host metabolic dysfunction, oxidative damage, uterine morphological abnormalities, and alterations of ovarian function. These results suggested that LAM administration could alleviate host metabolic dysfunctions and inflammatory damage, and then ameliorate oxidative damage in the oviduct induced by OFO, ultimately improving reproductive function.
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Malkani N, Sohail MI, Ijaz F, Naeem A, Mumtaz S, Saeed Z. Berberis aristata reduces vancomycin-induced nephrotoxicity by down-regulation of cell proliferation markers. J Herb Med 2022. [DOI: 10.1016/j.hermed.2022.100540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Han S, Lim JH, Bang J, Cho JH. Use of a combination of N-acetylcysteine and clonazepam to treat burning mouth syndrome. Oral Surg Oral Med Oral Pathol Oral Radiol 2021; 132:532-538. [PMID: 34479835 DOI: 10.1016/j.oooo.2021.07.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/29/2021] [Accepted: 07/17/2021] [Indexed: 12/11/2022]
Abstract
OBJECTIVE This study was intended to evaluate the clinical efficacy of a combination of N-acetylcysteine (NAC) and clonazepam for treatment of burning mouth syndrome (BMS). STUDY DESIGN A total of 160 patients with BMS were divided into 3 groups: group 1 received NAC (400 mg/d), group 2 received clonazepam (0.5 mg/d), and group 3 received both NAC and clonazepam. We evaluated symptom relief after 8 weeks of treatment using a visual analog scale (VAS). To assess oral health-related quality of life, we used the validated Korean version of an oral health impact profile (OHIP-14K). RESULTS The overall response rates of the 3 groups were 60.3%, 51.3%, and 80.0%, respectively. The mean VAS and OHIP-14K scores significantly decreased in all groups after the 8-week treatments. The VAS score changes were -12.2 ± 19.5, -10.0 ± 14.1, and -21.0 ± 24.6, respectively (P = .001), in the 3 groups and the OHIP-14K changes were -2.3 ± 9.2, -4.4 ± 6.9, and -8.7 ± 10.3, respectively (P = .020). Group 3 showed significantly larger differences in VAS and OHIP-14K scores than group 2, before and after treatment. CONCLUSIONS In the treatment of BMS, the NAC/clonazepam combination therapy was more effective than either monotherapy.
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Affiliation(s)
- Sungjun Han
- Clinical Assistant Professor, Department of Otolaryngology-Head and Neck Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ji-Hyung Lim
- Doctor, Department of Otolaryngology-Head and Neck Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jooin Bang
- Doctor, Department of Otolaryngology-Head and Neck Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jung-Hae Cho
- Assistant Professor, Department of Otolaryngology-Head and Neck Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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Kiełczewska U, Jorda R, Gonzalez G, Morzycki JW, Ajani H, Svrčková K, Štěpánková Š, Wojtkielewicz A. The synthesis and cholinesterase inhibitory activities of solasodine analogues with seven-membered F ring. J Steroid Biochem Mol Biol 2021; 205:105776. [PMID: 33130020 DOI: 10.1016/j.jsbmb.2020.105776] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 09/22/2020] [Accepted: 10/20/2020] [Indexed: 10/23/2022]
Abstract
Solasodine analogues containing a seven-membered F ring with a nitrogen atom placed at position 22a were prepared from diosgenin or tigogenin in a four-step synthesis comprising of the simultaneous opening of the F-ring and introduction of cyanide in position 22α, activation of the 26-hydroxyl group as mesylate, nitrile reduction, and N-cyclization. Solasodine, six obtained 22a(N)-homo analogues, as well as four 26a-homosolasodine derivatives and their open-chain precursors (13 in total) were tested as potential inhibitors of acetyl- and butyryl-cholinesterases and showed activity at micromolar concentrations. The structure-activity relationship study revealed that activities against studied esterases are affected by the structure of E/F rings and the substitution pattern of ring A. The most potent compound 8 acted as non-competitive inhibitors and exerted IC50 = 8.51 μM and 7.05 μM for eeAChE and eqBChE, respectively. Molecular docking studies revealed the hydrogen bond interaction of 8 with S293 of AChE; further rings are stabilized via hydrophobic interaction (ring A) or interaction with Y341 and W286 (rings B and C). Biological experiments showed no neurotoxicity of differentiated SH-SY5Y cells. More importantly, results from neuroprotective assay based on glutamate-induced cytotoxicity revealed that most derivatives had the ability to increase the viability of differentiated SH-SY5Y cells in comparison to galantamine and lipoic acid assayed as standards. The newly synthesized solasodine analogues are able to inhibit and to bind cholinesterases in noncompetitive mode of inhibition and exhibited neuroprotection potential of differentiated neuroblastoma cells after Glu-induced toxicity.
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Affiliation(s)
- Urszula Kiełczewska
- Faculty of Chemistry, University of Białystok, K. Ciołkowskiego 1K, 15-245, Białystok, Poland
| | - Radek Jorda
- Laboratory of Growth Regulators, Palacký University & Institute of Experimental Botany of The Czech Academy of Sciences, Šlechtitelů 27, 78371, Olomouc, Czech Republic; Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 77900, Olomouc, Czech Republic
| | - Gabriel Gonzalez
- Laboratory of Growth Regulators, Palacký University & Institute of Experimental Botany of The Czech Academy of Sciences, Šlechtitelů 27, 78371, Olomouc, Czech Republic; Department of Neurology, University Hospital Olomouc and Faculty of Medicine and Dentistry, Palacky University Olomouc, Czech Republic
| | - Jacek W Morzycki
- Faculty of Chemistry, University of Białystok, K. Ciołkowskiego 1K, 15-245, Białystok, Poland
| | - Haresh Ajani
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nam. 2, 166 10, Prague 6, Czech Republic
| | - Katarína Svrčková
- Department of Biological and Biochemical Sciences, Faculty of Technology, University of Pardubice, Czech Republic
| | - Šárka Štěpánková
- Department of Biological and Biochemical Sciences, Faculty of Technology, University of Pardubice, Czech Republic
| | - Agnieszka Wojtkielewicz
- Faculty of Chemistry, University of Białystok, K. Ciołkowskiego 1K, 15-245, Białystok, Poland.
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Hou Y, Li X, Peng S, Yao J, Bai F, Fang J. Lipoamide Ameliorates Oxidative Stress via Induction of Nrf2/ARE Signaling Pathway in PC12 Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:8227-8234. [PMID: 31299148 DOI: 10.1021/acs.jafc.9b02680] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The mechanisms underlying neurodegenerative diseases are not fully understood yet. However, an increasing amount of evidence has suggested that these disorders are related to oxidative stress. We reported herein that lipoamide (LM), a neutral amide derivative of lipoic acid (LA), could resist oxidative stress-mediated neuronal cell damage. LM is more potent than LA in alleviating hydrogen peroxide- or 6-hydroxydopamine-induced PC12 cell injury. Our results reveal that LM promotes the nuclear accumulation of NFE2-related factor 2 (Nrf2), following with the activation of expression of Nrf2-governed antioxidant and detoxifying enzymes. Notably, silencing Nrf2 gene annuls the protection of LM, which demonstrates that Nrf2 is engaged in this cytoprotection. Our findings suggest that LM might be used as a potential therapeutic candidate for oxidative stress-related neurological disorders.
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Affiliation(s)
- Yanan Hou
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China
| | - Xinming Li
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China
| | - Shoujiao Peng
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China
| | - Juan Yao
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China
| | - Feifei Bai
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China
| | - Jianguo Fang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou , Gansu 730000 , China
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Sanches JM, Giraldo PC, Amaral R, Eberlin MN, Marques LA, Migliorini I, Nakahira M, Bieleveld MJM, Discacciati MG. Vaginal lipidomics of women with vulvovaginal candidiasis and cytolytic vaginosis: A non-targeted LC-MS pilot study. PLoS One 2018; 13:e0202401. [PMID: 30133508 PMCID: PMC6105002 DOI: 10.1371/journal.pone.0202401] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 08/02/2018] [Indexed: 02/06/2023] Open
Abstract
Objective To characterize the lipid profile in vaginal discharge of women with vulvovaginal candidiasis, cytolytic vaginosis, or no vaginal infection or dysbiosis. Design Cross-sectional study. Setting Genital Infections Ambulatory, Department of Tocogynecology, University of Campinas, Campinas, São Paulo–Brazil. Sample Twenty-four women were included in this study: eight with vulvovaginal candidiasis, eight with cytolytic vaginosis and eight with no vaginal infections or dysbiosis (control group). Methods The lipid profile in vaginal discharge of the different study groups was determined by liquid chromatography-mass spectrometry and further analyzed with MetaboAnalyst 3.0 platform. Main outcome measures Vaginal lipids concentration and its correlation with vulvovaginal candidiasis and cytolytic vaginosis. Results PCA, PLS-DA and hierarchical clustering analyses indicated 38 potential lipid biomarkers for the different groups, correlating with oxidative stress, inflammation, apoptosis and integrity of the vaginal epithelial tissue. Among these, greater concentrations were found for Glycochenodeoxycholic acid-7-sulfate, O-adipoylcarnitine, 1-eicosyl-2-heptadecanoyl-glycero-3-phosphoserine, undecanoic acid, formyl dodecanoate and lipoic acid in the vulvovaginal candidiasis group; N–(tetradecanoyl)-sphinganine, DL-PPMP, 1-oleoyl-cyclic phosphatidic, palmitic acid and 5-aminopentanoic acid in the cytolytic vaginosis group; and 1-nonadecanoyl-glycero-3-phosphate, eicosadienoic acid, 1-stearoyl-cyclic-phosphatidic acid, 1-(9Z,12Z-heptadecadienoyl)-glycero-3-phosphate, formyl 9Z-tetradecenoate and 7Z,10Z-hexadecadienoic acid in the control group. Conclusions Lipids related to oxidative stress and apoptosis were found in higher concentrations in women with vulvovaginal candidiasis and cytolytic vaginosis, while lipids related to epithelial tissue integrity were more pronounced in the control group. Furthermore, in women with cytolytic vaginosis, we observed higher concentrations of lipids related to bacterial overgrowth.
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Affiliation(s)
- José Marcos Sanches
- Campinas State University, Department of Tocoginecology, Campinas, São Paulo, Brazil
- * E-mail:
| | - Paulo César Giraldo
- Campinas State University, Department of Tocoginecology, Campinas, São Paulo, Brazil
| | - Rose Amaral
- Campinas State University, Department of Tocoginecology, Campinas, São Paulo, Brazil
| | | | | | - Isabel Migliorini
- Campinas State University, Department of Tocoginecology, Campinas, São Paulo, Brazil
| | - Marcel Nakahira
- Campinas State University, Institute of Chemistry, Campinas, São Paulo, Brazil
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Treatment modalities for burning mouth syndrome: a systematic review. Clin Oral Investig 2018; 22:1893-1905. [DOI: 10.1007/s00784-018-2454-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 04/16/2018] [Indexed: 10/17/2022]
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Molz P, Schröder N. Potential Therapeutic Effects of Lipoic Acid on Memory Deficits Related to Aging and Neurodegeneration. Front Pharmacol 2017; 8:849. [PMID: 29311912 PMCID: PMC5732919 DOI: 10.3389/fphar.2017.00849] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 11/06/2017] [Indexed: 12/31/2022] Open
Abstract
The aging process comprises a series of organic alterations, affecting multiple systems, including the nervous system. Aging has been considered the main risk factor for the advance of neurodegenerative diseases, many of which are accompanied by cognitive impairment. Aged individuals show cognitive decline, which has been associated with oxidative stress, as well as mitochondrial, and consequently energetic failure. Lipoic acid (LA), a natural compound present in food and used as a dietary supplement, has been considered a promising agent for the treatment and/or prevention of neurodegenerative disorders. In spite of a number of preclinical studies showing beneficial effects of LA in memory functioning, and pointing to its neuroprotective potential effect, to date only a few studies have examined its effects in humans. Investigations performed in animal models of memory loss associated to aging and neurodegenerative disorders have shown that LA improves memory in a variety of behavioral paradigms. Moreover, cell and molecular mechanisms underlying LA effects have also been investigated. Accordingly, LA displays antioxidant, antiapoptotic, and anti-inflammatory properties in both in vivo and in vitro studies. In addition, it has been shown that LA reverses age-associated loss of neurotransmitters and their receptors, which can underlie its effects on cognitive functions. The present review article aimed at summarizing and discussing the main studies investigating the effects of LA on cognition as well as its cell and molecular effects, in order to improve the understanding of the therapeutic potential of LA on memory loss during aging and in patients suffering from neurodegenerative disorders, supporting the development of clinical trials with LA.
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Affiliation(s)
- Patrícia Molz
- Graduate Program in Medicine and Health Sciences, Faculty of Medicine, Pontifical Catholic University, Porto Alegre, Brazil
- Neurobiology and Developmental Biology Laboratory, Faculty of Biosciences, Pontifical Catholic University, Porto Alegre, Brazil
| | - Nadja Schröder
- Graduate Program in Medicine and Health Sciences, Faculty of Medicine, Pontifical Catholic University, Porto Alegre, Brazil
- Neurobiology and Developmental Biology Laboratory, Faculty of Biosciences, Pontifical Catholic University, Porto Alegre, Brazil
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Thangaraj M, Gengan RM. Ultrasonicated synthesis of novel quinoline-lipoyl peptides through Ugi-four component condensation by using Ca/BN catalyst. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2017.1381742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Muthu Thangaraj
- Department of Chemistry, Faculty of Applied Sciences, Durban University of Technology, Durban, South Africa
| | - Robert Moonsamy Gengan
- Department of Chemistry, Faculty of Applied Sciences, Durban University of Technology, Durban, South Africa
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Reddy EK, Remya C, Mantosh K, Sajith AM, Omkumar R, Sadasivan C, Anwar S. Novel tacrine derivatives exhibiting improved acetylcholinesterase inhibition: Design, synthesis and biological evaluation. Eur J Med Chem 2017; 139:367-377. [DOI: 10.1016/j.ejmech.2017.08.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 08/02/2017] [Accepted: 08/04/2017] [Indexed: 01/28/2023]
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15
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Ambrus A, Adam-Vizi V. Human dihydrolipoamide dehydrogenase (E3) deficiency: Novel insights into the structural basis and molecular pathomechanism. Neurochem Int 2017; 117:5-14. [PMID: 28579060 DOI: 10.1016/j.neuint.2017.05.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 05/22/2017] [Accepted: 05/30/2017] [Indexed: 11/18/2022]
Abstract
This review summarizes our present view on the molecular pathogenesis of human (h) E3-deficiency caused by a variety of genetic alterations with a special emphasis on the moonlighting biochemical phenomena related to the affected (dihydro)lipoamide dehydrogenase (LADH, E3, gene: dld), in particular the generation of reactive oxygen species (ROS). E3-deficiency is a rare autosomal recessive genetic disorder frequently presenting with a neonatal onset and premature death; the highest carrier rate of a single pathogenic dld mutation (1:94-1:110) was found among Ashkenazi Jews. Patients usually die during acute episodes that generally involve severe metabolic decompensation and lactic acidosis leading to neurological, cardiological, and/or hepatological manifestations. The disease owes its severity to the fact that LADH is the common E3 subunit of the alpha-ketoglutarate (KGDHc), pyruvate (PDHc), and branched-chain α-keto acid dehydrogenase complexes and is also part of the glycine cleavage system, hence the malfunctioning of LADH simultaneously incapacitates several central metabolic pathways. Nevertheless, the clinical pictures are usually not unequivocally portrayed through the loss of LADH activities and imply auxiliary mechanisms that exacerbate the symptoms and outcomes of this disorder. Enhanced ROS generation by disease-causing hE3 variants as well as by the E1-E2 subcomplex of the hKGDHc likely contributes to selected pathogeneses of E3-deficiency, which could be targeted by specific drugs or antioxidants; lipoic acid was demonstrated to be a potent inhibitor of ROS generation by hE3 in vitro. Flavin supplementation might prove to be beneficial for those mutations triggering FAD loss in the hE3 component. Selected pathogenic hE3 variants lose their affinity for the E2 component of the hPDHc, a mechanism which warrants scrutiny also for other E3-haboring complexes.
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Affiliation(s)
- Attila Ambrus
- Department of Medical Biochemistry, MTA-SE Laboratory for Neurobiochemistry, Semmelweis University, Budapest, Hungary.
| | - Vera Adam-Vizi
- Department of Medical Biochemistry, MTA-SE Laboratory for Neurobiochemistry, Semmelweis University, Budapest, Hungary.
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16
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Guerriero E, Sorice A, Capone F, Storti G, Colonna G, Ciliberto G, Costantini S. Combining doxorubicin with a phenolic extract from flaxseed oil: Evaluation of the effect on two breast cancer cell lines. Int J Oncol 2017; 50:468-476. [PMID: 28101573 DOI: 10.3892/ijo.2017.3835] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 07/29/2016] [Indexed: 11/05/2022] Open
Abstract
Breast cancer is one of the most frequently diagnosed forms of cancer and different treatments are used to block its progression. However, it still represents a very common cause of death in women. Doxorubicin (Dox) is reported as an effective agent in breast cancer treatment nonetheless it induces many side‑effects. For this reason, many laboratories are engaged in understanding how it is possible to decrease the drug concentration, considering that one of the possible solutions is to use drug synergy, combining it with natural substances. Recently we showed that a phenolic extract from flaxseed (FS) oil, named PEFSO, induced on MCF‑7 cell line an increase of apoptosis with related modification of G0/G1 phase cell cycle, and the activation of signaling and pro‑oxidant pathways. In this study we present data on the combined effect of Dox and PEFSO on two different breast cancer cell lines to define the conditions to use lower doses of this chemotherapeutic agent. We report the data relating to the ability of this mixture to induce cytotoxicity and apoptosis, cell cycle modification, mitochondrial membrane depolarization and activation of extrinsic and/or intrinsic apoptotic pathway.
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Affiliation(s)
- Eliana Guerriero
- CROM, Istituto Nazionale Tumori 'Fondazione G. Pascale' ‑ IRCCS, Naples, Italy
| | - Angela Sorice
- CROM, Istituto Nazionale Tumori 'Fondazione G. Pascale' ‑ IRCCS, Naples, Italy
| | - Francesca Capone
- CROM, Istituto Nazionale Tumori 'Fondazione G. Pascale' ‑ IRCCS, Naples, Italy
| | | | - Giovanni Colonna
- Medical Informatics Service, University Hospital, Second University of Naples, Naples, Italy
| | - Gennaro Ciliberto
- Scientific Direction, Istituto Nazionale Tumori 'Fondazione G. Pascale' ‑ IRCCS, Naples, Italy
| | - Susan Costantini
- CROM, Istituto Nazionale Tumori 'Fondazione G. Pascale' ‑ IRCCS, Naples, Italy
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A review on tacrine-based scaffolds as multi-target drugs (MTDLs) for Alzheimer's disease. Eur J Med Chem 2016; 128:332-345. [PMID: 27876467 DOI: 10.1016/j.ejmech.2016.10.060] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 10/26/2016] [Accepted: 10/27/2016] [Indexed: 11/22/2022]
Abstract
Alzheimer's disease (AD) is a multifactorial neurological disorder among elderly people and combinatorial factors such as genetic, lifestyle, and environmental are involved in onset and disease progression. It has been demonstrated that loss of cholinergic transmission is one of the most significant causes of AD. One strategy currently being investigated for the development of new therapeutics relates to the enhancement of cholinergic system through several ways. At this juncture, anticholinesterase inhibitors have absorbed lots of attention and different marketed drugs such as donepezil, rivastigmine, tacrine, and galantamine have been developed. 9-Amino-1,2,3,4-tetrahydroacridine known as tacrine was introduced in 1945 as an efficient anticholinesterase agent. The mechanism of action of tacrine was proved to inhibit the metabolism of acetylcholine and therefore extending its activity and raising levels in the cerebral cortex. However, extensive use of tacrine was limited since it showed various side effects and toxicity. Thus, lots of efforts were carried out to prepare tacrine analogues to overcome the related adverse effects. This review describes differently synthesized tacrine-based scaffolds as cholinesterase inhibitors to manage Alzheimer's disease (AD).
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Differential Response of Two Human Breast Cancer Cell Lines to the Phenolic Extract from Flaxseed Oil. Molecules 2016; 21:319. [PMID: 27005599 PMCID: PMC6274312 DOI: 10.3390/molecules21030319] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 02/26/2016] [Accepted: 03/02/2016] [Indexed: 12/16/2022] Open
Abstract
Many studies have evidenced that the phenolic components from flaxseed (FS) oil have potential health benefits. The effect of the phenolic extract from FS oil has been evaluated on two human breast cancer cell lines, MCF7 and MDA-MB231, and on the human non-cancerous breast cell line, MCF10A, by SRB assay, cellular death, cell cycle, cell signaling, lipid peroxidation and expression of some key genes. We have evidenced that the extract shows anti-proliferative activity on MCF7 cells by inducing cellular apoptosis, increase of the percentage of cells in G0/G1 phase and of lipid peroxidation, activation of the H2AX signaling pathway, and upregulation of a six gene signature. On the other hand, on the MDA-MB2131 cells we verified only an anti-proliferative activity, a weak lipid peroxidation, the activation of the PI3K signaling pathway and an up-regulation of four genes. Overall these data suggest that the extract has both cytotoxic and pro-oxidant effects only on MCF7 cells, and can act as a metabolic probe, inducing differences in the gene expression. For this purpose, we have performed an interactomic analysis, highlighting the existing associations. From this approach, we show that the phenotypic difference between the two cell lines can be explained through their differential response to the phenolic extract.
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Naito Y, Ikuta N, Nakata D, Terao K, Matsumoto K, Kajiwara N, Okano A, Yasui H, Yoshikawa Y. Antidiabetic effect of the α-lipoic acid γ-cyclodextrin complex. J Clin Biochem Nutr 2014; 55:97-102. [PMID: 25320456 PMCID: PMC4186374 DOI: 10.3164/jcbn.14-56] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 04/28/2014] [Indexed: 12/29/2022] Open
Abstract
In recent years, the number of patients suffering from diabetes mellitus has been increasing worldwide. In particular, type 2 diabetes mellitus, a lifestyle-related disease, is recognized as a serious disease with various complications. Many types of pharmaceutics or specific health foods have been used for the management of diabetes mellitus. At the same time, the relationship between diabetes mellitus and α-lipoic acid has been recognized for many years. In this study, we found that the α-lipoic acid γ-cyclodextrin complex exhibited an HbA1c lowering effect for treating type 2 diabetes mellitus in animal models. Moreover, in this study, we investigated the activation of phosphorylation of AMP-activated protein kinase, which plays a role in cellular energy homeostasis, in the liver of KKAy mice by using α-lipoic acid and the α-lipoic acid γ-cyclodextrin complex. Our results show that the α-lipoic acid γ-cyclodextrin complex strongly induced the phosphorylation of AMP-activated protein kinase. Thus, we concluded that intake of the α-lipoic acid γ-cyclodextrin complex exerted an antidiabetic effect by suppressing the elevation of postprandial hyperglycemia as well as doing exercise.
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Affiliation(s)
- Yuki Naito
- Department of Analytical and Bioinorganic Chemistry, Division of Analytical and Physical Chemistry, Kyoto Pharmaceutical University, 5, Misasagi-Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan
| | - Naoko Ikuta
- Department of Social/Community Medicine and Health Science, Food and Drug Evaluation Science, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan
| | - Daisuke Nakata
- CycloChem Bio Co., Ltd., KIBC 654R, 5-5-2, Minatojima-Minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Keiji Terao
- Department of Social/Community Medicine and Health Science, Food and Drug Evaluation Science, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan ; CycloChem Bio Co., Ltd., KIBC 654R, 5-5-2, Minatojima-Minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Kinuyo Matsumoto
- Department of Health and Sports Nutrition, Faculty of Health and Welfare, Kobe Women's University, 4-7-2, Minatojima-Nakamachi, Chuo-ku, Kobe 650-0046, Japan
| | - Naemi Kajiwara
- Department of Health and Sports Nutrition, Faculty of Health and Welfare, Kobe Women's University, 4-7-2, Minatojima-Nakamachi, Chuo-ku, Kobe 650-0046, Japan
| | - Ayaka Okano
- Department of Analytical and Bioinorganic Chemistry, Division of Analytical and Physical Chemistry, Kyoto Pharmaceutical University, 5, Misasagi-Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan
| | - Hiroyuki Yasui
- Department of Analytical and Bioinorganic Chemistry, Division of Analytical and Physical Chemistry, Kyoto Pharmaceutical University, 5, Misasagi-Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan
| | - Yutaka Yoshikawa
- Department of Analytical and Bioinorganic Chemistry, Division of Analytical and Physical Chemistry, Kyoto Pharmaceutical University, 5, Misasagi-Nakauchi-cho, Yamashina-ku, Kyoto 607-8414, Japan ; Department of Health and Sports Nutrition, Faculty of Health and Welfare, Kobe Women's University, 4-7-2, Minatojima-Nakamachi, Chuo-ku, Kobe 650-0046, Japan
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20
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Wang Y, Gao A, Xu X, Dang B, You W, Li H, Yu Z, Chen G. The Neuroprotection of Lysosomotropic Agents in Experimental Subarachnoid Hemorrhage Probably Involving the Apoptosis Pathway Triggering by Cathepsins via Chelating Intralysosomal Iron. Mol Neurobiol 2014; 52:64-77. [PMID: 25112680 DOI: 10.1007/s12035-014-8846-y] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 07/31/2014] [Indexed: 01/11/2023]
Abstract
α-Lipoic acid-plus (LAP), an amine derivative of α-lipoic acid (LA), could protect cells against oxidant challenges via chelating intralysosomal iron. However, the application of LAP in experimental subarachnoid hemorrhage (SAH) is still not well known. This study was designed to evaluate the potential neuroprotection of LAP on the early brain injury (EBI) and the underlying mechanisms in a rat model of SAH. The SAH models were induced in Sprague-Dawley rats. LA and LAP were oral administration and lasted for 72 h once a day. The brain tissue samples were obtained for assay at 72 h after SAH. In experiment 1, we found that lysosome amounts in neurons decreased significantly in SAH group, and LAP (100 mg/kg) could stabilize lysosomal membrane markedly based on lysosomal-associated membrane protein-1 (LAMP-1) expression in neurons by immunofluorescence. Hence, the LAP dosages of 100 and 150 mg/kg were applied in experiment 2. Firstly, Western blot analysis showed that the protein levels of cathepsin B/D, caspase-3, Bax, ferritin, and heme-oxygenase-1 (HO-1) markedly increased after SAH, which were further confirmed by double immunofluorescence staining and reversed by LA and LAP treatments. In addition, LA and LAP also reduced oxidative stress and iron deposition in brain tissue. Furthermore, LA and LAP significantly ameliorated brain edema, blood-brain barrier injury, cortical apoptosis, and neurological behavior impairment induced by SAH. Finally, it is noteworthy that LAP exerted more significant effects than LA on these parameters as described above. LAP probably exerted neuroprotective effects via targeting lysosomes and chelating intralysosomal iron in EBI post-SAH in rats.
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Affiliation(s)
- Yang Wang
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, People's Republic of China
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21
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Lanz ND, Pandelia ME, Kakar ES, Lee KH, Krebs C, Booker SJ. Evidence for a catalytically and kinetically competent enzyme-substrate cross-linked intermediate in catalysis by lipoyl synthase. Biochemistry 2014; 53:4557-72. [PMID: 24901788 PMCID: PMC4216189 DOI: 10.1021/bi500432r] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lipoyl synthase (LS) catalyzes the final step in lipoyl cofactor biosynthesis: the insertion of two sulfur atoms at C6 and C8 of an (N(6)-octanoyl)-lysyl residue on a lipoyl carrier protein (LCP). LS is a member of the radical SAM superfamily, enzymes that use a [4Fe-4S] cluster to effect the reductive cleavage of S-adenosyl-l-methionine (SAM) to l-methionine and a 5'-deoxyadenosyl 5'-radical (5'-dA(•)). In the LS reaction, two equivalents of 5'-dA(•) are generated sequentially to abstract hydrogen atoms from C6 and C8 of the appended octanoyl group, initiating sulfur insertion at these positions. The second [4Fe-4S] cluster on LS, termed the auxiliary cluster, is proposed to be the source of the inserted sulfur atoms. Herein, we provide evidence for the formation of a covalent cross-link between LS and an LCP or synthetic peptide substrate in reactions in which insertion of the second sulfur atom is slowed significantly by deuterium substitution at C8 or by inclusion of limiting concentrations of SAM. The observation that the proteins elute simultaneously by anion-exchange chromatography but are separated by aerobic SDS-PAGE is consistent with their linkage through the auxiliary cluster that is sacrificed during turnover. Generation of the cross-linked species with a small, unlabeled (N(6)-octanoyl)-lysyl-containing peptide substrate allowed demonstration of both its chemical and kinetic competence, providing strong evidence that it is an intermediate in the LS reaction. Mössbauer spectroscopy of the cross-linked intermediate reveals that one of the [4Fe-4S] clusters, presumably the auxiliary cluster, is partially disassembled to a 3Fe-cluster with spectroscopic properties similar to those of reduced [3Fe-4S](0) clusters.
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Affiliation(s)
- Nicholas D Lanz
- Department of Biochemistry and Molecular Biology and ‡Department of Chemistry, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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22
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Bolognesi ML, Bergamini C, Fato R, Oiry J, Vasseur JJ, Smietana M. Synthesis of New Lipoic Acid Conjugates and Evaluation of Their Free Radical Scavenging and Neuroprotective Activities. Chem Biol Drug Des 2014; 83:688-96. [DOI: 10.1111/cbdd.12282] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 12/06/2013] [Accepted: 01/06/2014] [Indexed: 01/06/2023]
Affiliation(s)
- Maria Laura Bolognesi
- Department of Pharmacy and Biotechnology; University of Bologna; Via Belmeloro 6 and Via Irnerio 4 40126 Bologna Italy
| | - Christian Bergamini
- Department of Pharmacy and Biotechnology; University of Bologna; Via Belmeloro 6 and Via Irnerio 4 40126 Bologna Italy
| | - Romana Fato
- Department of Pharmacy and Biotechnology; University of Bologna; Via Belmeloro 6 and Via Irnerio 4 40126 Bologna Italy
| | - Joël Oiry
- Institut des Biomolecules Max Mousseron; IBMM UMR 5247 CNRS; Université Montpellier 1; Université Montpellier 2; Place Eugène Bataillon 34095 Montpellier France
| | - Jean-Jacques Vasseur
- Institut des Biomolecules Max Mousseron; IBMM UMR 5247 CNRS; Université Montpellier 1; Université Montpellier 2; Place Eugène Bataillon 34095 Montpellier France
| | - Michael Smietana
- Institut des Biomolecules Max Mousseron; IBMM UMR 5247 CNRS; Université Montpellier 1; Université Montpellier 2; Place Eugène Bataillon 34095 Montpellier France
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Rosini M, Simoni E, Milelli A, Minarini A, Melchiorre C. Oxidative Stress in Alzheimer’s Disease: Are We Connecting the Dots? J Med Chem 2013; 57:2821-31. [DOI: 10.1021/jm400970m] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Michela Rosini
- Department
of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Elena Simoni
- Department
of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Andrea Milelli
- Department
for Life Quality Studies, Alma Mater Studiorum—University of Bologna, Corso d’Augusto
237, 47921 Rimini, Italy
| | - Anna Minarini
- Department
of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
| | - Carlo Melchiorre
- Department
of Pharmacy and Biotechnology, Alma Mater Studiorum—University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
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Loss of miR-29b following acute ischemic stroke contributes to neural cell death and infarct size. J Cereb Blood Flow Metab 2013; 33:1197-206. [PMID: 23632968 PMCID: PMC3734770 DOI: 10.1038/jcbfm.2013.68] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 04/05/2013] [Accepted: 04/08/2013] [Indexed: 01/31/2023]
Abstract
Glutathione depletion and 12-lipoxygenase-dependent metabolism of arachidonic acid are known to be implicated in neurodegeneration associated with acute ischemic stroke. The objective of this study was to investigate the significance of miR-29 in neurodegeneration associated with acute ischemic stroke. Neural cell death caused by arachidonic acid insult of glutathione-deficient cells was preceded by a 12-lipoxygenase-dependent loss of miR-29b. Delivery of miR-29b mimic to blunt such loss was neuroprotective. miR-29b inhibition potentiated such neural cell death. 12-Lipoxygenase knockdown and inhibitors attenuated the loss of miR-29b in challenged cells. In vivo, stroke caused by middle-cerebral artery occlusion was followed by higher 12-lipoxygenase activity and loss of miR-29b as detected in laser-captured infarct site tissue. 12-Lipoxygenase knockout mice demonstrated protection against such miR loss. miR-29b gene delivery markedly attenuated stroke-induced brain lesion. Oral supplementation of α-tocotrienol, a vitamin E 12-lipoxygenase inhibitor, rescued stroke-induced loss of miR-29b and minimized lesion size. This work provides the first evidence demonstrating that loss of miR-29b at the infarct site is a key contributor to stroke lesion. Such loss is contributed by activity of the 12-lipoxygenase pathway providing maiden evidence linking arachidonic acid metabolism to miR-dependent mechanisms in stroke.
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Analysis of the enhanced stability of r(+)-alpha lipoic Acid by the complex formation with cyclodextrins. Int J Mol Sci 2013; 14:3639-55. [PMID: 23434662 PMCID: PMC3588062 DOI: 10.3390/ijms14023639] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 01/25/2013] [Accepted: 01/28/2013] [Indexed: 01/07/2023] Open
Abstract
R(+)-alpha lipoic acid (RALA) is one of the cofactors for mitochondrial enzymes and, therefore, plays a central role in energy metabolism. RALA is unstable when exposed to low pH or heat, and therefore, it is difficult to use enantiopure RALA as a pharma- and nutra-ceutical. In this study, we have aimed to stabilize RALA through complex formation with cyclodextrins (CDs). α-CD, β-CD and γ-CD were used for the formation of these RALA-CD complexes. We confirmed the complex formation using differential scanning calorimetry and showed by using HPLC analysis that complexed RALA is more stable than free RALA when subjected to humidity and high temperature or acidic pH conditions. Scanning electron microscopy studies showed that the particle size and shape differed depending on the cyclodextrin used for complexation. Further, the complexes of CD and RALA showed a different particle size distribution pattern compared with that of CD itself or that of the physical mixture of RALA and CD.
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26
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Rosini M, Simoni E, Bartolini M, Tarozzi A, Matera R, Milelli A, Hrelia P, Andrisano V, Bolognesi ML, Melchiorre C. Exploiting the lipoic acid structure in the search for novel multitarget ligands against Alzheimer's disease. Eur J Med Chem 2011; 46:5435-42. [PMID: 21924801 DOI: 10.1016/j.ejmech.2011.09.001] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 08/31/2011] [Accepted: 09/01/2011] [Indexed: 10/17/2022]
Abstract
Lipoic acid (LA) is a natural antioxidant. Its structure was previously combined with that of the acetylcholinesterase inhibitor tacrine to give lipocrine (1), a lead compound multitargeted against Alzheimer's disease (AD). Herein, we further explore LA as a privileged structure for developing multimodal compounds to investigate AD. First, we studied the effect of LA chirality by evaluating the cholinesterase profile of 1's enantiomers. Then, a new series of LA hybrids was designed and synthesized by combining racemic LA with motifs of other known anticholinesterase agents (rivastigmine and memoquin). This afforded 4, which represents a step forward in the search for balanced anticholinesterase and antioxidant capacities.
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Affiliation(s)
- Michela Rosini
- Department of Pharmaceutical Sciences, University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy.
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Effects of lipoic acid, caffeic acid and a synthesized lipoyl-caffeic conjugate on human hepatoma cell lines. Molecules 2011; 16:6365-77. [PMID: 21796075 PMCID: PMC6264529 DOI: 10.3390/molecules16086365] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 07/22/2011] [Accepted: 07/26/2011] [Indexed: 01/01/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is among the most aggressive and fatal cancers. Its treatment with conventional chemotherapeutic agents is inefficient, due to several side effects linked to impaired organ function typical of liver diseases. Consequently, there exists a decisive requirement to explore possible alternative chemopreventive and therapeutic strategies. The use of dietary antioxidants and micronutrients has been proposed for HCC successful management. The aim of this work was to test in vitro the effects of lipoic acid, caffeic acid and a new synthesized lipoyl-caffeic conjugate on human hepatoma cell lines in order to assess their effect on tumor cell growth. The results of cytotoxicity assays at different times showed that the cell viability was directly proportional to the molecule concentrations and incubation times. Moreover, to evaluate the pro- or anti-inflammatory effects of these molecules, the cytokine concentrations were evaluated in treated and untreated cellular supernatants. The obtained cytokine pattern showed that, at the increasing of three molecules concentrations, three pro-inflammatory cytokines such as IL-1β, IL-8 and TNF-α decreased whereas the anti-inflammatory cytokine such as IL-10 increased.
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28
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Zhang H, Ye N, Zhou S, Guo L, Zheng L, Liu Z, Gao B, Zhen X, Zhang A. Identification of N-Propylnoraporphin-11-yl 5-(1,2-Dithiolan-3-yl)pentanoate as a New Anti-Parkinson's Agent Possessing a Dopamine D2 and Serotonin 5-HT1A Dual-Agonist Profile. J Med Chem 2011; 54:4324-38. [DOI: 10.1021/jm200347t] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hai Zhang
- Department of Pharmacology, Soochow University College of Pharmaceutical Sciences, Suzhou, China 215325
| | | | | | | | - Longtai Zheng
- Department of Pharmacology, Soochow University College of Pharmaceutical Sciences, Suzhou, China 215325
| | | | - Bo Gao
- Department of Pharmacology, Soochow University College of Pharmaceutical Sciences, Suzhou, China 215325
| | - Xuechu Zhen
- Department of Pharmacology, Soochow University College of Pharmaceutical Sciences, Suzhou, China 215325
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Hourani R, Jain M, Maysinger D, Kakkar A. Multi-tasking with Single Platform Dendrimers for Targeting Sub-Cellular Microenvironments. Chemistry 2010; 16:6164-8. [DOI: 10.1002/chem.201000241] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ambrus A, Tretter L, Adam-Vizi V. Inhibition of the alpha-ketoglutarate dehydrogenase-mediated reactive oxygen species generation by lipoic acid. J Neurochem 2009; 109 Suppl 1:222-9. [PMID: 19393031 DOI: 10.1111/j.1471-4159.2009.05942.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Dihydrolipoamide dehydrogenase (LADH) is a flavo-enzyme that serves as a subunit of alpha-ketoglutarate dehydrogenase complex (alpha-KGDHC). Reactive oxygen species (ROS) generation by alpha-KGDHC has been assigned to LADH (E3 subunit) and explained by the diaphorase activity of E3. Dysfunctions of alpha-KGDHC and concurrent ROS production have been implicated in neurodegeneration, ischemia-reperfusion, and other pathological conditions. In this work we investigated the in-depth details of ROS generation by isolated LADH and alpha-KGDHC. We found a parallel generation of superoxide and hydrogen peroxide by the E3 subunit of alpha-KGDHC which could be blocked by lipoic acid (LA) acting on a site upstream of the E3 subunit. The pathologically relevant ROS generation (at high NADH/NAD+ ratio and low pH) in the reverse mode of alpha-KGDHC could also be inhibited by LA. Our results contradict the previously proposed mechanism for pH-dependent ROS generation by LADH, showing no disassembling of the E3 functional homodimer at acidic pH using a physiologically relevant method for the examination. It is also suggested that LA could be beneficial in reducing the cell damage related to excessive ROS generation under pathological conditions.
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Affiliation(s)
- Attila Ambrus
- Department of Medical Biochemistry, Neurobiochemical Research Group, Hungarian Academy of Sciences and Szentagothai Janos Knowledge Center, Semmelweis University, Budapest, Hungary
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Yu DH, Bao YM, An LJ, Yang M. Protection of PC12 cells against superoxide-induced damage by isoflavonoids from Astragalus mongholicus. BIOMEDICAL AND ENVIRONMENTAL SCIENCES : BES 2009; 22:50-54. [PMID: 19462688 DOI: 10.1016/s0895-3988(09)60022-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE To further investigate the neuroprotective effects of five isoflavonoids from Astragalus mongholicus on xanthine (XA)/ xanthine oxidase (XO)-induced injury to PC12 cells. METHODS PC12 cells were damaged by XA/XO. The activities of antioxidant enzymes, MTT, LDH, and GSH assays were used to evaluate the protection of these five isoflavonoids. Contents of Bcl-2 family proteins were determined with flow cytometry. RESULTS Among the five isoflavonoids including formononetin, ononin, 9, 10-dimethoxypterocarpan-3-O-beta-D-glucoside, calycosin and calycosin-7-O-glucoside, calycosin and calycosin-7-O-glucoside were found to inhibit XA/ XO-induced injury to PC12 cells. Their EC50 values of formononetin and calycosin were 0.05 microg/mL. Moreover, treatment with these three isoflavonoids prevented a decrease in the activities of antioxidant enzymes, superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), while formononetin and calycosin could prevent a significant deletion of GSH. In addition, only calycosin and calycosin-7-O-glucoside were shown to inhibit XO activity in cell-free system, with an approximate IC50 value of 10 microg/mL and 50 microg/mL. Formononetin and calycosin had no significant influence on Bcl-2 or Bax protein contents. CONCLUSION Neuroprotection of formononetin, calycosin and calycosin-7-O-glucoside may be mediated by increasing endogenous antioxidants, rather by inhibiting XO activities or by scavenging free radicals.
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Affiliation(s)
- De-Hong Yu
- The State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100083, China
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Jia Z, Zhu H, Vitto MJ, Misra BR, Li Y, Misra HP. Alpha-lipoic acid potently inhibits peroxynitrite-mediated DNA strand breakage and hydroxyl radical formation: implications for the neuroprotective effects of alpha-lipoic acid. Mol Cell Biochem 2008; 323:131-8. [DOI: 10.1007/s11010-008-9971-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2008] [Accepted: 11/13/2008] [Indexed: 11/27/2022]
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Tirosh O, Ilan E, Anavi S, Ramadori G, Madar Z. Nutritional lipid-induced oxidative stress leads to mitochondrial dysfunction followed by necrotic death in FaO hepatocytes. Nutrition 2008; 25:200-8. [PMID: 18947977 DOI: 10.1016/j.nut.2008.07.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2008] [Revised: 07/03/2008] [Accepted: 07/18/2008] [Indexed: 10/21/2022]
Abstract
OBJECTIVE Mitochondrial dysfunction and hepatocyte cell death have been reported in fatty liver and non-alcoholic steatohepatitis. Our aim in this study was to evaluate whether direct exposure of hepatocytes to extracellular fat could facilitate such deleterious effects. METHODS FaO hepatic cells treated with fat was used as an in vitro model for steatosis. FaO hepatocytes were exposed to 0.1% triacylglycerols using commercially available lipid emulsion (LE) for various periods and studied for production of reactive oxygen species (ROS), mitochondrial function, and cell death parameters. To study the type of cell death, high-mobility group box chromosomal protein 1cellular levels, DNA fragmentation, and caspase activity were evaluated. RESULTS Cells incubated with LE for 6 h exhibited a marked increase in the production of intracellular ROS. Using treatments with peroxisome proliferator-activated receptor activators, mitochondrial electron-transfer chain inhibitor, and different sources of LE that did or did not contain medium-chain triacylglycerols, the mitochondria were found to be the source of ROS. LE treatment resulted in phosphorylation of adenosine monophosphate-activated protein kinase, accompanied by a decrease in adenosine triphosphate levels. Changes in intracellular ROS and energy levels were followed by cell death. FaO hepatocytes showed a significant reduction in high-mobility group box chromosomal protein-1 and little DNA fragmentation. Incubation with LE for 24 h did not change caspase-3 activity, indicating that hepatocyte death was necrotic. The antioxidant N-acetylcysteine was able to attenuate the changes in intracellular energy levels and ROS levels and to prevent cell death after exposure to LE. CONCLUSION These results suggest that exposure of FaO cells to LE leads to an increase in mitochondrial ROS production and a decrease in cellular energy levels followed by necrotic cell death.
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Affiliation(s)
- Oren Tirosh
- The Hebrew University of Jerusalem, Faculty of Agricultural, Food and Environmental Quality Sciences, Institute of Biochemistry, Food Science and Nutrition, Rehovot, Israel
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Steele JC, Bruce AJ, Drage LA, Rogers RS. α-Lipoic acid treatment of 31 patients with sore, burning mouth. Oral Dis 2008; 14:529-32. [DOI: 10.1111/j.1601-0825.2007.01414.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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A serum substitute for fed-batch culturing of hybridoma cells. Cytotechnology 2008; 57:187-97. [PMID: 19003165 DOI: 10.1007/s10616-008-9155-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Accepted: 07/01/2008] [Indexed: 10/21/2022] Open
Abstract
We developed a substitute for serum to produce fed-batch cultures of hybridoma cells in serum-free medium and confirmed that the cells could be successfully cultivated this way. Our substitute consisted of 12 components. The specific production rates of lactate and ammonia, which are harmful byproducts from the cells, were significantly reduced compared with a conventional serum-containing batch culture. This reduction led to a higher cell concentration and a longer production lifetime. As a result, the final concentration of monoclonal antibody was 400 mg/L, or five times greater than that in the conventional serum-containing batch culture. The developed substitute is expected to enable fed-batch cultivation in a serum-free condition.
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Decker M, Kraus B, Heilmann J. Design, synthesis and pharmacological evaluation of hybrid molecules out of quinazolinimines and lipoic acid lead to highly potent and selective butyrylcholinesterase inhibitors with antioxidant properties. Bioorg Med Chem 2008; 16:4252-61. [DOI: 10.1016/j.bmc.2008.02.083] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2007] [Revised: 02/19/2008] [Accepted: 02/26/2008] [Indexed: 11/26/2022]
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Jariwalla RJ, Lalezari J, Cenko D, Mansour SE, Kumar A, Gangapurkar B, Nakamura D. Restoration of Blood Total Glutathione Status and Lymphocyte Function Followingα-Lipoic Acid Supplementation in Patients with HIV Infection. J Altern Complement Med 2008; 14:139-46. [DOI: 10.1089/acm.2006.6397] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Raxit J. Jariwalla
- California Institute for Medical Research, San Jose, CA
- Currently at Dr. Rath Research Institute, Santa Clara, CA
| | | | - Diane Cenko
- Quest Clinical Research, San Francisco, CA
- Saint Francis Memorial Hospital, San Francisco, CA
| | - Sam E. Mansour
- Eye Clinic, Santa Clara Valley Medical Center, San Jose, CA
- Currently at the Virginia Retina Center, Leesburg, VA
| | - Abha Kumar
- Eye Clinic, Santa Clara Valley Medical Center, San Jose, CA
| | - Bhakti Gangapurkar
- California Institute for Medical Research, San Jose, CA
- Currently at Dr. Rath Research Institute, Santa Clara, CA
| | - Daniel Nakamura
- California Institute for Medical Research, San Jose, CA
- Currently in San Bruno, CA
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Osborne NN. Pathogenesis of ganglion “cell death” in glaucoma and neuroprotection: focus on ganglion cell axonal mitochondria. PROGRESS IN BRAIN RESEARCH 2008; 173:339-52. [DOI: 10.1016/s0079-6123(08)01124-2] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Potent Upregulation of Glutathione and NAD(P)H:Quinone Oxidoreductase 1 by Alpha-lipoic Acid in Human Neuroblastoma SH-SY5Y Cells: Protection Against Neurotoxicant-elicited Cytotoxicity. Neurochem Res 2007; 33:790-800. [DOI: 10.1007/s11064-007-9496-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2007] [Accepted: 08/28/2007] [Indexed: 11/26/2022]
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Liu J. The Effects and Mechanisms of Mitochondrial Nutrient α-Lipoic Acid on Improving Age-Associated Mitochondrial and Cognitive Dysfunction: An Overview. Neurochem Res 2007; 33:194-203. [PMID: 17605107 DOI: 10.1007/s11064-007-9403-0] [Citation(s) in RCA: 139] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2007] [Accepted: 06/05/2007] [Indexed: 12/31/2022]
Abstract
We have identified a group of nutrients that can directly or indirectly protect mitochondria from oxidative damage and improve mitochondrial function and named them "mitochondrial nutrients". The direct protection includes preventing the generation of oxidants, scavenging free radicals or inhibiting oxidant reactivity, and elevating cofactors of defective mitochondrial enzymes with increased Michaelis-Menten constant to stimulate enzyme activity, and also protect enzymes from further oxidation, and the indirect protection includes repairing oxidative damage by enhancing antioxidant defense systems either through activation of phase 2 enzymes or through increase in mitochondrial biogenesis. In this review, we take alpha-lipoic acid (LA) as an example of mitochondrial nutrients by summarizing the protective effects and possible mechanisms of LA and its derivatives on age-associated cognitive and mitochondrial dysfunction of the brain. LA and its derivatives improve the age-associated decline of memory, improve mitochondrial structure and function, inhibit the age-associated increase of oxidative damage, elevate the levels of antioxidants, and restore the activity of key enzymes. In addition, co-administration of LA with other mitochondrial nutrients, such as acetyl-L: -carnitine and coenzyme Q10, appears more effective in improving cognitive dysfunction and reducing oxidative mitochondrial dysfunction. Therefore, administrating mitochondrial nutrients, such as LA and its derivatives in combination with other mitochondrial nutrients to aged people and patients suffering from neurodegenerative diseases, may be an effective strategy for improving mitochondrial and cognitive dysfunction.
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Affiliation(s)
- Jiankang Liu
- Institute for Brain Aging and Dementia, University of California, 1261 Gillespie Neuroscience Research Facility, Irvine, CA 92697, USA.
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41
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Koufaki M, Kiziridi C, Nikoloudaki F, Alexis MN. Design and synthesis of 1,2-dithiolane derivatives and evaluation of their neuroprotective activity. Bioorg Med Chem Lett 2007; 17:4223-7. [PMID: 17531485 DOI: 10.1016/j.bmcl.2007.05.036] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2007] [Revised: 05/09/2007] [Accepted: 05/11/2007] [Indexed: 10/23/2022]
Abstract
We designed and synthesized new analogues containing 1,2-dithiolane-3-alkyl and protected or free catechol moieties connected through heteroaromatic rings such as triazole, 1,2,4-oxadiazole, 1,3,4-oxadiazole, tetrazole or thiazole in order to explore the influence of the bioisosteric replacement of the amide group on the neuroprotective activity of the lipoic acid/dopamine conjugate. Evaluation of the activity of the new compounds, using glutamate-challenged hippocampal HT22 cells, showed that incorporation of heteroaromatic rings in the alkyl-1,2-dithiolane moieties in conjunction with another antioxidant, in this case catechol, may result in strong neuroprotective activity.
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Affiliation(s)
- Maria Koufaki
- National Hellenic Research Foundation, Institute of Organic and Pharmaceutical Chemistry, 48 Vas. Constantinou Avenue, 116 35 Athens, Greece.
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42
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Khanna S, Roy S, Parinandi NL, Maurer M, Sen CK. Characterization of the potent neuroprotective properties of the natural vitamin E alpha-tocotrienol. J Neurochem 2006; 98:1474-86. [PMID: 16923160 PMCID: PMC1847628 DOI: 10.1111/j.1471-4159.2006.04000.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The natural vitamin E tocotrienols possess properties not shared by tocopherols. Nanomolar alpha-tocotrienol, not alpha-tocopherol, is potently neuroprotective. On a concentration basis, this finding represents the most potent of all biological functions exhibited by any natural vitamin E molecule. We sought to dissect the antioxidant-independent and -dependent neuroprotective properties of alpha-tocotrienol by using two different triggers of neurotoxicity, homocysteic acid (HCA) and linoleic acid. Both HCA and linoleic acid caused neurotoxicity with comparable features, such as increased ratio of oxidized to reduced glutathione GSSG/GSH, raised intracellular calcium concentration and compromised mitochondrial membrane potential. Mechanisms underlying HCA-induced neurodegeneration were comparable to those in the path implicated in glutamate-induced neurotoxicity. Inducible activation of c-Src and 12-lipoxygenase (12-Lox) represented early events in that pathway. Overexpression of active c-Src or 12-Lox sensitized cells to HCA-induced death. Nanomolar alpha-tocotrienol was protective. Knock-down of c-Src or 12-Lox attenuated HCA-induced neurotoxicity. Oxidative stress represented a late event in HCA-induced death. The observation that micromolar, but not nanomolar, alpha-tocotrienol functions as an antioxidant was verified in a model involving linoleic acid-induced oxidative stress and cell death. Oral supplementation of alpha-tocotrienol to humans results in a peak plasma concentration of 3 microm. Thus, oral alpha-tocotrienol may be neuroprotective by antioxidant-independent as well as antioxidant-dependent mechanisms.
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Affiliation(s)
- Savita Khanna
- Laboratory of Molecular Medicine, Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Medical Center, Colombus, Ohio 43210, USA
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44
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Rosini M, Andrisano V, Bartolini M, Bolognesi ML, Hrelia P, Minarini A, Tarozzi A, Melchiorre C. Rational approach to discover multipotent anti-Alzheimer drugs. J Med Chem 2005; 48:360-3. [PMID: 15658850 DOI: 10.1021/jm049112h] [Citation(s) in RCA: 181] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The coupling of two different pharmacophores, each endowed with different biological properties, afforded the hybrid compound lipocrine (7), whose biological profile was markedly improved relative to those of prototypes tacrine and lipoic acid. Lipocrine is the first compound that inhibits the catalytic activity of AChE and AChE-induced amyloid-beta aggregation and protects against reactive oxygen species. Thus, it emerged as a valuable pharmacological tool to investigate Alzheimer's disease and as a promising lead compound for new anti-Alzheimer drugs.
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Affiliation(s)
- Michela Rosini
- Department of Pharmaceutical Sciences, Alma Mater Studiorum, University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
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Abdel-Wahhab MA, Said A, Huefner A. NMR and Radical Scavenging Activities of Patuletin from Urtica urens. Against Aflatoxin B 1. PHARMACEUTICAL BIOLOGY 2005; 43:515-525. [DOI: 10.1080/13880200500220730] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/06/2024]
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Antonello A, Hrelia P, Leonardi A, Marucci G, Rosini M, Tarozzi A, Tumiatti V, Melchiorre C. Design, Synthesis, and Biological Evaluation of Prazosin-Related Derivatives as Multipotent Compounds. J Med Chem 2004; 48:28-31. [PMID: 15633998 DOI: 10.1021/jm049153d] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
To combine in the same molecule alpha(1)-adrenoreceptor blocking and antioxidant properties, compounds 2-5 were designed and synthesized. All compounds were effective alpha(1)-adrenoreceptor antagonists and were tested in both functional and binding assays. In addition, compounds 2 and 5 also displayed significant capacity to inhibit intracellular oxidative stress, whereas 3-5 exerted potent antiproliferative activity in lymph node carcinoma of prostate cells.
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Affiliation(s)
- Alessandra Antonello
- Departments of Pharmaceutical Sciences, Alma Mater Studiorum, University of Bologna, Via Belmeloro 6, 40126 Bologna, Italy
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Abstract
Vitamin E is essential for normal neurological function. It is the major lipid-soluble, chain-breaking antioxidant in the body, protecting the integrity of membranes by inhibiting lipid peroxidation. Mostly on the basis of symptoms of primary vitamin E deficiency, it has been demonstrated that vitamin E has a central role in maintaining neurological structure and function. Orally supplemented vitamin E reaches the cerebrospinal fluid and brain. Vitamin E is a generic term for all tocopherols and their derivatives having the biological activity of RRR-alpha-tocopherol, the naturally occurring stereoisomer compounds with vitamin E activity. In nature, eight substances have been found to have vitamin E activity: alpha-, beta-, gamma- and delta-tocopherol; and alpha-, beta-, gamma- and delta-tocotrienol. Often, the term vitamin E is synonymously used with alpha-tocopherol. Tocotrienols, formerly known as zeta, , or eta-tocopherols, are similar to tocopherols except that they have an isoprenoid tail with three unsaturation points instead of a saturated phytyl tail. Although tocopherols are predominantly found in corn, soybean, and olive oils, tocotrienols are particularly rich in palm, rice bran, and barley oils. Tocotrienols possess powerful antioxidant, anticancer, and cholesterol-lowering properties. Recently, we have observed that alpha-tocotrienol is multi-fold more potent than alpha-tocopherol in protecting HT4 and primary neuronal cells against toxicity induced by glutamate as well as by a number of other toxins. At nanomolar concentration, tocotrienol, but not tocopherol, completely protected neurons by an antioxidant-independent mechanism. Our current work identifies two major targets of tocotrienol in the neuron: c-Src kinase and 12-lipoxygenase. Dietary supplementation studies have established that tocotrienol, fed orally, does reach the brain. The current findings point towards tocotrienol as a potent neuroprotective form of natural vitamin E.
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Affiliation(s)
- Chandan K Sen
- Davis Heart & Lung Research Institute, 473 West 12th Avenue, The Ohio State University Medical Center, Columbus, Ohio 43210, USA.
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Femiano F, Gombos F, Scully C. Burning mouth syndrome: the efficacy of lipoic acid on subgroups. J Eur Acad Dermatol Venereol 2004; 18:676-8. [PMID: 15482293 DOI: 10.1111/j.1468-3083.2004.01049.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE We have examined the effect of alpha-lipoic acid (ALA, tioctic acid; Tiobec), a free radical scavenger, on the discomfort of burning mouth syndrome (BMS) in patients who had used tranquillizers previously, compared with those who had not. METHODS In this study we gave lipoic acid for 2 months to two groups of 20 BMS patients, one of which had previously been treated with tranquillizers. RESULTS The results showed greater effectiveness of lipoic acid in BMS patients who had not previously used tranquillizers. CONCLUSIONS The patients with BMS who had previously been treated with tranquillizers responded poorly to therapy with lipoic acid compared with those who had not received previous psychotropic therapy.
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Affiliation(s)
- F Femiano
- Stomatology Clinic, II University of Medicine and Surgery, Naples, Italy.
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Scala A, Checchi L, Montevecchi M, Marini I, Giamberardino MA. Update on burning mouth syndrome: overview and patient management. CRITICAL REVIEWS IN ORAL BIOLOGY AND MEDICINE : AN OFFICIAL PUBLICATION OF THE AMERICAN ASSOCIATION OF ORAL BIOLOGISTS 2003; 14:275-91. [PMID: 12907696 DOI: 10.1177/154411130301400405] [Citation(s) in RCA: 324] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Burning Mouth Syndrome (BMS) is a chronic pain syndrome that mainly affects middle-aged/old women with hormonal changes or psychological disorders. This condition is probably of multifactorial origin, often idiopathic, and its etiopathogenesis remains largely enigmatic. The present paper discusses several aspects of BMS, updates current knowledge, and provides guidelines for patient management. There is no consensus on the diagnosis and classification of BMS. The etiopathogenesis seems to be complex and in a large number of patients probably involves interactions among local, systemic, and/or psychogenic factors. In the remaining cases, new interesting associations have recently emerged between BMS and either peripheral nerve damage or dopaminergic system disorders, emphasizing the neuropathic background in BMS. Based on these recent data, we have introduced the concepts of "primary" (idiopathic) and "secondary" (resulting from identified precipitating factors) BMS, since this allows for a more systematic approach to patient management. The latter starts with a differential diagnosis based on the exclusion of both other orofacial chronic pain conditions and painful oral diseases exhibiting muco-sal lesions. However, the occurrence of overlapping/overwhelming oral mucosal pathologies, such as infections, may cause difficulties in the diagnosis ("complicated BMS"). BMS treatment is still unsatisfactory, and there is no definitive cure. As a result, a multidisciplinary approach is required to bring the condition under better control. Importantly, BMS patients should be offered regular follow-up during the symptomatic periods and psychological support for alleviating the psychogenic component of the pain. More research is necessary to confirm the association between BMS and systemic disorders, as well as to investigate possible pathogenic mechanisms involving potential nerve damage. If this goal is to be achieved, a uniform definition of BMS and strict criteria for its classification are mandatory.
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Affiliation(s)
- A Scala
- Department of Oral Surgery, School of Dentistry, University of Bologna, Via San Vitale 59, 40125 Bologna, Italy.
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Persson HL, Yu Z, Tirosh O, Eaton JW, Brunk UT. Prevention of oxidant-induced cell death by lysosomotropic iron chelators. Free Radic Biol Med 2003; 34:1295-305. [PMID: 12726917 DOI: 10.1016/s0891-5849(03)00106-0] [Citation(s) in RCA: 143] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Intralysosomal iron powerfully synergizes oxidant-induced cellular damage. The iron chelator, desferrioxamine (DFO), protects cultured cells against oxidant challenge but pharmacologically effective concentrations of this drug cannot readily be achieved in vivo. DFO localizes almost exclusively within the lysosomes following endocytic uptake, suggesting that truly lysosomotropic chelators might be even more effective. We hypothesized that an amine derivative of alpha-lipoamide (LM), 5-[1,2] dithiolan-3-yl-pentanoic acid (2-dimethylamino-ethyl)-amide (alpha-lipoic acid-plus [LAP]; pKa = 8.0), would concentrate via proton trapping within lysosomes, and that the vicinal thiols of the reduced form of this agent would interact with intralysosomal iron, preventing oxidant-mediated cell damage. Using a thiol-reactive fluorochrome, we find that reduced LAP does accumulate within the lysosomes of cultured J774 cells. Furthermore, LAP is approximately 1000 and 5000 times more effective than LM and DFO, respectively, in protecting lysosomes against oxidant-induced rupture and in preventing ensuing apoptotic cell death. Suppression of lysosomal accumulation of LAP (by ammonium-mediated lysosomal alkalinization) blocks these protective effects. Electron paramagnetic resonance reveals that the intracellular generation of hydroxyl radical following addition of hydrogen peroxide to J774 cells is totally eliminated by pretreatment with either DFO (1 mM) or LAP (0.2 microM) whereas LM (200 microM) is much less effective.
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Affiliation(s)
- Hans L Persson
- Division of Pathology II, Faculty of Health Sciences, University of Linköping, Linköping, Sweden.
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