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Cai Z, Guo H, Zhou Q, Zhao S, Ding L. Simultaneous determination of maltol and maltol glucuronide in human plasma and urine by HPLC-MS/MS: Application in clinical study in patients with iron deficiency. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1225:123760. [PMID: 37270862 DOI: 10.1016/j.jchromb.2023.123760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 05/08/2023] [Accepted: 05/14/2023] [Indexed: 06/06/2023]
Abstract
Ferric maltol has been used as an oral drug for iron deficiency. This study developed and fully validated the novel HPLC-MS/MS methods to determine maltol and maltol glucuronide simultaneously in plasma and urine. The protein precipitation was performed by addition of acetonitrile in the plasma samples. The dilution was performed for the urine samples to reach the suitable concentrations for injection. The multiple reaction monitoring (MRM) with an electrospray ionization (ESI) positive ion detection mode was used for the quantification. The maltol concentration linear ranges were 6.00-150 ng/mL and 0.100-10.0 μg/mL for the plasma and urine samples, respectively. The maltol glucuronide concentration linear ranges were 50.0-15000 ng/mL and 2.00-2000 μg/mL for the plasma and urine samples, respectively. These methods were applied to a single dose clinical study at a dose of 60 mg ferric maltol capsule in the patients with iron deficiency. The half-lives of maltol and maltol glucuronide were 0.90 ± 0.40 h and 1.02 ± 0.25 h in the iron deficiency patients, respectively. 39.52 ± 7.11 % maltol were excreted in urine in the form of maltol glucuronide.
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Affiliation(s)
- Zhengwen Cai
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Haifang Guo
- Department of Clinical Pharmacology, Jiangsu Aosaikang Pharmaceutical Co. Ltd, Nanjing, China
| | - Qiaoyun Zhou
- Nanjing Clinical Tech. Laboratories Inc, Nanjing, China
| | - Shunbo Zhao
- Nanjing Clinical Tech. Laboratories Inc, Nanjing, China
| | - Li Ding
- Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China; Nanjing Clinical Tech. Laboratories Inc, Nanjing, China.
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Jin MH, Hu JN, Zhang M, Meng Z, Shi GP, Wang Z, Li W. Maltol attenuates polystyrene nanoplastic-induced enterotoxicity by promoting AMPK/mTOR/TFEB-mediated autophagy and modulating gut microbiota. Environ Pollut 2023; 322:121202. [PMID: 36736819 DOI: 10.1016/j.envpol.2023.121202] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/19/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
The production and application of nanoplastics has been increased during decades, and the enterotoxicity caused by their bioaccumulation has attracted vast attention. Maltol was proved to exert a protective effect on gut damage induced by carbon tetrachloride and cisplatin, indicating its confrontation with nanoplastics-induced intestinal toxicity. To explore the ameliorative effects of maltol on polystyrene nanoplastics (PS)-mediated enterotoxicity and the underlying mechanism, the mice were exposed to PS (100 mg/kg), combining with or without the treatment of maltol treatment at 50 and 100 mg/kg. We found PS exposure caused intestinal barrier damage and enterocyte apoptosis, while lysosomal dysfunction and autophagic substrate degradation arrest in enterocytes of mice were also observed. In addition, PS exacerbated the disturbance of the intestinal microbial community, affected the abundance of lysosome and apoptosis-related bacterial genes, and decreased the number of known short-chain fatty acid (SCFA) producing bacteria. However, those alterations were improved by the maltol treatment. Maltol also protected the human intestinal Caco-2 cells from PS-induce damages. Mechanistic studies showed maltol promoted TFEB nuclear translocation through the AMPK/mTOR signaling pathway to restore lysosomal function and reduce autophagy dependent apoptosis. The findings in the present work might help to elucidate the potential molecular mechanisms of PS-induced enterotoxicity. For the first time to our knowledge, the protective effect of maltol on PS-induced intestinal injury was studied from multiple perspectives, which provided a potential therapeutic approach for diseases caused by environmental pollution.
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Affiliation(s)
- Ming-Hui Jin
- College of Chinese Medicinal Materials, Jilin Provincial International Joint Research Center for the Development and Utilization of Authentic Medicinal Materials, Jilin Agricultural University, Changchun, 130118, China
| | - Jun-Nan Hu
- College of Chinese Medicinal Materials, Jilin Provincial International Joint Research Center for the Development and Utilization of Authentic Medicinal Materials, Jilin Agricultural University, Changchun, 130118, China
| | - Ming Zhang
- College of Life Sciences, Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, Changchun, 130118, China; College of Medicine, Jilin University, Changchun, 130021, China
| | - Zhaojie Meng
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, 02115, USA
| | - Guo-Ping Shi
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, 02115, USA
| | - Zi Wang
- College of Chinese Medicinal Materials, Jilin Provincial International Joint Research Center for the Development and Utilization of Authentic Medicinal Materials, Jilin Agricultural University, Changchun, 130118, China
| | - Wei Li
- College of Chinese Medicinal Materials, Jilin Provincial International Joint Research Center for the Development and Utilization of Authentic Medicinal Materials, Jilin Agricultural University, Changchun, 130118, China; College of Life Sciences, Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, Changchun, 130118, China.
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Gong Y, Qiu J, Jiang T, Li Z, Zhang W, Zheng X, He Z, Chen W, Wang Z, Feng X, Wang M, Hong Z. Maltol ameliorates intervertebral disc degeneration through inhibiting PI3K/AKT/NF-κB pathway and regulating NLRP3 inflammasome-mediated pyroptosis. Inflammopharmacology 2023; 31:369-84. [PMID: 36401729 DOI: 10.1007/s10787-022-01098-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 10/29/2022] [Indexed: 11/21/2022]
Abstract
OBJECTIVES As one of the major causes of low back pain, intervertebral disc degeneration (IDD) has caused a huge problem for humans. Increasing evidence indicates that NLRP3 inflammasome-mediated pyroptosis of NP cells displays an important role in the progression of IDD. Maltol (MA) is a flavoring agent extracted from red ginseng. Due to its anti-inflammatory and antioxidant effects, MA has been widely considered by researchers. Therefore, we hypothesized that MA may be a potential IVD protective agent by regulating NP cells and their surrounding microenvironment. METHODS In vitro, qRT-PCR, and Western blot were used to explore the effect of MA on the transcription and protein expression of the anabolic protein (ADAMTS5, MMP3, MMP9) catabolic protein (Aggrecan), and pro-inflammatory factor (iNOS COX-2). Next, the effects of MA on PI3K/AKT/NF-κB pathway and pyroptosis pathway were analyzed by Western blot and immunofluorescence. Molecular docking was used to investigate the relationship between PI3K and MA. Moreover, ELISA was also used to detect the effects of MA on inflammatory factors (TNF-α, PGE2, IL-1β, and IL-18). In vivo, the effects of MA on the vertebral structure of IDD mice were studied by HE and SO staining and the effects of MA on ECM and PI3K/AKT/NF-κB and pyroptosis pathway of IDD mice were studied by immunohistochemical staining. RESULTS MA can ameliorate intervertebral disc degeneration in vivo and in vitro. Specifically, the molecular docking results showed that the binding degree of MA and PI3K was significant. Second, in vitro studies showed that MA inhibited the degradation of ECM and inflammatory response by inhibiting the PI3K/AKT/NF-κB pathway and the pyroptosis mediated by NLRP3 inflammasome, which increased the expression of anabolic proteins, decreased the expression of catabolic proteins, and decreased the secretion of inflammatory mediators such as IL-18 and IL-1β. In addition, according to the study results of the mouse lumbar instability model, MA also improved the tissue disorder and degradation of the intervertebral disc, reduced the loss of proteoglycan and glycosaminoglycan, and inhibited intervertebral disc inflammation, indicating that MA has a protective effect on the intervertebral disc to intervertebral disc in mice. CONCLUSIONS Our results suggest that MA slowed IDD development through the PI3K/AKT/NF-κB signaling pathway and NLRP3 inflammasome-mediated pyroptosis, indicating that MA appeared to be a viable medication for IDD treatment.
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Ng CH, Tan TH, Tioh NH, Seng HL, Ahmad M, Ng SW, Gan WK, Low ML, Lai JW, Zulkefeli M. Synthesis, characterization and multiple targeting with selectivity: Anticancer property of ternary metal phenanthroline- maltol complexes. J Inorg Biochem 2021; 220:111453. [PMID: 33895694 DOI: 10.1016/j.jinorgbio.2021.111453] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/26/2021] [Accepted: 03/26/2021] [Indexed: 02/01/2023]
Abstract
The cobalt(II), copper(II) and zinc(II) complexes of 1,10-phenanthroline (phen) and maltol (mal) (complexes 1, 2, 3 respectively) were prepared from their respective metal(II) chlorides and were characterized by FT-IR, elemental analysis, UV spectroscopy, molar conductivity, p-nitrosodimethylaniline assay and mass spectrometry. The X-ray structure of a single crystal of the zinc(II) analogue reveals a square pyramidal structure with distinctly shorter apical chloride bond. All complexes were evaluated for their anticancer property on breast cancer cell lines MCF-7 and MDA-MB-231, and normal cell line MCF-10A, using (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and morphological studies. Complex 2 was most potent for 24, 48 and 72 h treatment of cancer cells but it was not selective towards cancer over normal cells. The mechanistic studies of the cobalt(II) complex 1 involved apoptosis assay, cell cycle analysis, dichloro-dihydro-fluorescein diacetate assay, intracellular reactive oxygen species assay and proteasome inhibition assay. Complex 1 induced low apoptosis, generated low level of ROS and did not inhibit proteasome in normal cells. The study of the DNA binding and nucleolytic properties of complexes 1-3 in the absence or presence of H2O2 or sodium ascorbate revealed that only complex 1 was not nucleolytic.
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Affiliation(s)
- Chew Hee Ng
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia.
| | - Thean Heng Tan
- Faculty of Science and Engineering, Universiti Tunku Abdul Rahman, 53300 Kuala Lumpur, Malaysia
| | - Ngee Heng Tioh
- Faculty of Science and Engineering, Universiti Tunku Abdul Rahman, 53300 Kuala Lumpur, Malaysia
| | - Hoi Ling Seng
- Faculty of Science and Engineering, Universiti Tunku Abdul Rahman, 53300 Kuala Lumpur, Malaysia
| | - Munirah Ahmad
- Molecular Pathology Unit, Cancer Research Center, Institute for Medical Research, 50588 Kuala Lumpur, Malaysia
| | - Seik Weng Ng
- UCSI University, Cheras, 56000, Kuala Lumpur, Malaysia
| | - Wei Khang Gan
- School of Postgraduate Studies, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia
| | - May Lee Low
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Jing Wei Lai
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Mohd Zulkefeli
- Department of Pharmaceutical Chemistry, School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
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Chen Z, Xi G, Fu Y, Wang Q, Cai L, Zhao Z, Liu Q, Bai B, Ma Y. Synthesis of 2,3-dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one from maltol and its taste identification. Food Chem 2021; 361:130052. [PMID: 34023685 DOI: 10.1016/j.foodchem.2021.130052] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 05/02/2021] [Accepted: 05/04/2021] [Indexed: 11/15/2022]
Abstract
2,3-Dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one (DDMP) exists in many foods, and its effect on taste is controversial. The aim of this study was to clarify whether DDMP has bitter taste or not. For this purpose, DDMP was synthesized from maltol instead of from glucose for the first time. In contrast, DDMP derived from glucose was also prepared and further purified. Their structures were identified by NMR and MS, and considered to be the same substance. The sensory analysis showed that DDMP derived from maltol was tasteless. Further studies indicated that some impurities in Maillard reaction made DDMP derived from glucose taste bitter.
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Affiliation(s)
- Zhifei Chen
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450016, PR China
| | - Gaolei Xi
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450016, PR China
| | - Yufeng Fu
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450016, PR China
| | - Qingfu Wang
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450016, PR China
| | - Lili Cai
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450016, PR China
| | - Zhiwei Zhao
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450016, PR China
| | - Qiang Liu
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450016, PR China
| | - Bing Bai
- School of Food & Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China.
| | - Yuping Ma
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450016, PR China.
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Tian YE, Sun D, Yang JM, Che ZP, Liu SM, Lin XM, Jiang J, Chen GQ. Synthesis of sulfonate derivatives of maltol and their biological activity against Phytophthora capsici and Bursaphelenchus xylophilus in vitro. J Asian Nat Prod Res 2020; 22:578-587. [PMID: 31046458 DOI: 10.1080/10286020.2019.1608958] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/11/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
Sixteen sulfonate derivatives of maltol were synthesized and screened in vitro for their anti-oomycete and nematicidal activity against Phytophthora capsici and Bursaphelenchus xylophilus, respectively. Among all the compounds, 3e, 3m, and 3p exhibited the most promising and pronounced anti-oomycete activity against P. capsici than zoxamide, and the EC50 values of 25.42, 18.44, 23.69, and 27.99 mg/L, respectively; compounds 3e, 3m, 3n, and 3p exhibited potent nematicidal activity with LC50 values ranging from 1 to 2 mg/L, especially 3m and 3n showed the best promising and pronounced nematicidal activity, with LC50 values of 1.1762 and 1.2384 mg/L, respectively. [Formula: see text].
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Affiliation(s)
- Yue-E Tian
- Laboratory of Pharmaceutical Design and Synthesis, Department of Plant Protection, College of Forestry, Henan University of Science and Technology, Luoyang 471003, China
| | - Di Sun
- Laboratory of Pharmaceutical Design and Synthesis, Department of Plant Protection, College of Forestry, Henan University of Science and Technology, Luoyang 471003, China
| | - Jin-Ming Yang
- Laboratory of Pharmaceutical Design and Synthesis, Department of Plant Protection, College of Forestry, Henan University of Science and Technology, Luoyang 471003, China
| | - Zhi-Ping Che
- Laboratory of Pharmaceutical Design and Synthesis, Department of Plant Protection, College of Forestry, Henan University of Science and Technology, Luoyang 471003, China
| | - Sheng-Ming Liu
- Laboratory of Pharmaceutical Design and Synthesis, Department of Plant Protection, College of Forestry, Henan University of Science and Technology, Luoyang 471003, China
| | - Xiao-Min Lin
- Laboratory of Pharmaceutical Design and Synthesis, Department of Plant Protection, College of Forestry, Henan University of Science and Technology, Luoyang 471003, China
| | - Jia Jiang
- Laboratory of Pharmaceutical Design and Synthesis, Department of Plant Protection, College of Forestry, Henan University of Science and Technology, Luoyang 471003, China
| | - Gen-Qiang Chen
- Laboratory of Pharmaceutical Design and Synthesis, Department of Plant Protection, College of Forestry, Henan University of Science and Technology, Luoyang 471003, China
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Naqvi S, Anwer H, Ahmed SW, Siddiqui A, Shah MR, Khaliq S, Ahmed A, Ali SA. Synthesis and characterization of maltol capped silver nanoparticles and their potential application as an antimicrobial agent and colorimetric sensor for cysteine. Spectrochim Acta A Mol Biomol Spectrosc 2020; 229:118002. [PMID: 31923785 DOI: 10.1016/j.saa.2019.118002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 12/26/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
Maltol capped silver nanoparticles (McAgNPs) were synthesized using maltol (3-hydroxy-2-methyl-4-pyrone) as reducing and capping agent. McAgNPs were characterized by Visible and FTIR (Fourier transform infrared) spectroscopy, dynamic light scattering (DLS), and atomic force microscopy (AFM). Bright yellow color McAgNPs showed surface plasmon resonance (SPR) band at 436 nm, spherical shape and the average size between 35 to 50 nm. McAgNPs revealed higher stability against varying storage time, temperature, pH and salt concentrations. McAgNPs were successfully utilized for the selective and highly sensitive colorimetric detection of cysteine (Cys). Addition of Cys in a solution of McAgNPs, resulted a rapid change in color from yellow to orange because of the formation of nanoaggregates as confirmed by Visible/FTIR spectroscopy, DLS, and AFM studies. The estimated limit of detection (0.043 μM) was found to be more sensitive than previously reported other optical methods. The practical applicability of probe was also established by spiking the known concentrations of Cys in biological (blood plasma and urine) and environmental (tap and lake water) samples with significant recovery rates (92-104.6%). Despite being nontoxic to various tested cell lines, McAgNPs demonstrated potent antimicrobial, antibiofilm, and biofilm eradicating activities, thus potentially valuable in diagnostics and/or the synthesis of other nanocomposite material for broader applications.
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Affiliation(s)
- Sumra Naqvi
- Department of Chemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan
| | - Humera Anwer
- Department of Chemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan
| | - Syed Waseem Ahmed
- Department of Chemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan; H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Asma Siddiqui
- Department of Chemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan
| | - Muhammad Raza Shah
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Saima Khaliq
- Department of Biochemistry, Federal Urdu University Art, Science & Technology, Gulshan-e-Iqbal Campus, Karachi 75300, Pakistan
| | - Ayaz Ahmed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan
| | - Syed Abid Ali
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Karachi 75270, Pakistan.
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Dahora LI, Fitzgerald A, Emanuel M, Baiges AF, Husain Z, Thompson CK. The Flavor Enhancer Maltol Increases Pigment Aggregation in Dermal and Neural Melanophores in Xenopus laevis Tadpoles. Environ Toxicol Chem 2020; 39:381-395. [PMID: 31721268 DOI: 10.1002/etc.4626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/26/2019] [Accepted: 10/18/2019] [Indexed: 06/10/2023]
Abstract
Melanophores are pigmented cells that change the distribution of melanosomes, enabling animals to appear lighter or darker for camouflage, thermoregulation, and protection from ultraviolet radiation. A complex series of hormonal and neural mechanisms regulates melanophore pigment distribution, making these dynamic cells a valuable tool to screen toxicants as they rapidly respond to changes in the environment. We found that maltol, a naturally occurring flavor enhancer and fragrance agent, induces melanophore pigment aggregation in a dose-dependent manner in Xenopus laevis tadpoles. To determine if maltol affects camouflage adaptation, we placed tadpoles into maltol baths situated over either a white or a black background. Maltol induced pigment aggregation in a similar dose-dependent pattern regardless of background color. We also tested how maltol treatment compares to melatonin treatment and found that the degree of pigment aggregation induced by maltol is similar to treatment with melatonin but that maltol induces over a much longer time course. Last, maltol had no effect on mRNA expression in the brain of genes that regulate camouflage-related pigment aggregation. The present results suggest that maltol does not exert its effects via the camouflage adaptation mechanism or via melatonin-related mechanisms. These results are the first to identify a putative toxicological effect of maltol exposure in vivo and rule out several mechanisms by which maltol may exert its effects on pigment aggregation. Environ Toxicol Chem 2020;39:381-395. © 2019 SETAC.
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Affiliation(s)
- Lara I Dahora
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia, USA
| | | | - Matthew Emanuel
- School of Neuroscience, Virginia Tech, Blacksburg, Virginia, USA
| | - Alexa F Baiges
- School of Neuroscience, Virginia Tech, Blacksburg, Virginia, USA
| | - Zahabiya Husain
- School of Neuroscience, Virginia Tech, Blacksburg, Virginia, USA
| | - Christopher K Thompson
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia, USA
- School of Neuroscience, Virginia Tech, Blacksburg, Virginia, USA
- Global Change Center, Virginia Tech, Blacksburg, Virginia, USA
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Peroković VP, Car Ž, Usenik A, Opačak-Bernardi T, Jurić A, Tomić S. Adamantyl pyran-4-one derivatives and their in vitro antiproliferative activity. Mol Divers 2019; 24:253-263. [PMID: 30953295 DOI: 10.1007/s11030-019-09948-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 03/27/2019] [Indexed: 12/29/2022]
Abstract
Pyran-4-one (maltol, kojic acid and chlorokojic acid 1) esters of adamantan-1-ylacetic acid were prepared through efficient synthetic routes in good yields and evaluated for their in vitro antiproliferative activity on four cancer cell lines: K562 (chronic myelogenous leukemia), HeLa (cervical cancer), Caco-2 (colorectal adenocarcinoma) and NCI-H358 (bronchioalveolar carcinoma). The results indicate that the presence and the position of the adamantyl acyl group or chlorine atom are the necessary requirement for antitumor activity of pyranone systems. Derivatives of kojic acid with either free (compounds 1 and 8) or acylated 5-OH group (compounds 2 and 9) have shown good-to-moderate activity (IC50 values ranging from 13.1 to 43.0 μM) on all cell lines. Adamantyl kojic acid derivative 5 with a free OH group on the position 2 showed activity only on the K562 cell line. It seems that removal of halogen or adamantyl unit from position 2 elicits antileukemic activity, as observed in compound 5. The positive influence of the adamantyl unit was also observed on a 3-OH acylated derivative of maltol I which was also selectively active on the same cell line. 5-O-benzylated adamantyl compounds 6 and 7 and unmodified starting pyranones were found to be inactive. Antibacterial activity of compounds was also evaluated on S. aureus ATCC 13709, M. catarrhalis ATCC 23246, E. faecalis ATCC29212 and E. coli TolC-Tn10, but no activity was observed (MIC values 128-256 µg/mL).
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Affiliation(s)
- Vesna Petrović Peroković
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000, Zagreb, Croatia
| | - Željka Car
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000, Zagreb, Croatia.
| | - Andrea Usenik
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000, Zagreb, Croatia
| | - Teuta Opačak-Bernardi
- Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, Josipa Huttlera 4, 31000, Osijek, Croatia
| | - Andrea Jurić
- Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, 31000, Osijek, Croatia
| | - Srđanka Tomić
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000, Zagreb, Croatia
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10
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Platzer S, Sap O, Leyma R, Wallner G, Jirsa F, Kandioller W, Krachler R, Keppler BK. Extraction of natural radionuclides from aqueous solutions by novel maltolate-based task-specific ionic liquids. J Radioanal Nucl Chem 2015. [PMID: 26224982 PMCID: PMC4514620 DOI: 10.1007/s10967-014-3782-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Two novel maltol-based ionic liquids, namely [A336][Mal] and [C101][Mal], were synthesized as potential extracting agents for radionuclides from water. These two room temperature task-specific ionic liquids could be easily prepared by anion metathesis starting from commercially available materials. The isolated compounds were characterized by standard analytical methods. Their application as extraction agent for Unat., 234Th, 210Pb, 210Bi, 210Po and 226Ra was elucidated by liquid–liquid extraction and scintillation counting. Uranium was totally extracted by both ionic liquids over a broad pH range (2–8), while the other radionuclides were removed with differing efficacies depending on the respective pH value.
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Affiliation(s)
- Sonja Platzer
- Faculty of Chemistry, Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, 1090 Vienna, Austria
| | - Orhan Sap
- Faculty of Chemistry, Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, 1090 Vienna, Austria
| | - Raphlin Leyma
- Faculty of Chemistry, Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, 1090 Vienna, Austria
| | - Gabriele Wallner
- Faculty of Chemistry, Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, 1090 Vienna, Austria
| | - Franz Jirsa
- Faculty of Chemistry, Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, 1090 Vienna, Austria
| | - Wolfgang Kandioller
- Faculty of Chemistry, Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, 1090 Vienna, Austria
| | - Regina Krachler
- Faculty of Chemistry, Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, 1090 Vienna, Austria
| | - Bernhard K Keppler
- Faculty of Chemistry, Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, 1090 Vienna, Austria
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Song Y, Hong S, Iizuka Y, Kim CY, Seong GJ. The neuroprotective effect of maltol against oxidative stress on rat retinal neuronal cells. Korean J Ophthalmol 2015; 29:58-65. [PMID: 25646062 PMCID: PMC4309870 DOI: 10.3341/kjo.2015.29.1.58] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 10/15/2014] [Indexed: 11/23/2022] Open
Abstract
PURPOSE Maltol (3-hydroxy-2-methyl-4-pyrone), formed by the thermal degradation of starch, is found in coffee, caramelized foods, and Korean ginseng root. This study investigated whether maltol could rescue neuroretinal cells from oxidative injury in vitro. METHODS R28 cells, which are rat embryonic precursor neuroretinal cells, were exposed to hydrogen peroxide (H2O2, 0.0 to 1.5 mM) as an oxidative stress with or without maltol (0.0 to 1.0 mM). Cell viability was monitored with the lactate dehydrogenase assay and apoptosis was examined by the terminal deoxynucleotide transferase-mediated terminal uridine deoxynucleotidyl transferase nick end-labeling (TUNEL) method. To investigate the neuroprotective mechanism of maltol, the expression and phosphorylation of nuclear factor-kappa B (NF-κB), extracellular signal-regulated kinase (ERK), c-Jun N-terminal kinase (JNK), and p38 were evaluated by Western immunoblot analysis. RESULTS R28 cells exposed to H2O2 were found to have decreased viability in a dose- and time-dependent manner. However, H2O2-induced cytotoxicity was decreased with the addition of maltol. When R28 cells were exposed to 1.0 mM H2O2 for 24 hours, the cytotoxicity was 60.69 ± 5.71%. However, the cytotoxicity was reduced in the presence of 1.0 mM maltol. This H2O2-induced cytotoxicity caused apoptosis of R28 cells, characterized by DNA fragmentation. Apoptosis of oxidatively-stressed R28 cells with 1.0 mM H2O2 was decreased with 1.0 mM maltol, as determined by the TUNEL method. Western blot analysis showed that treatment with maltol reduced phosphorylation of NF-κB, ERK, and JNK, but not p38. The neuroprotective effects of maltol seemed to be related to attenuated expression of NF-κB, ERK, and JNK. CONCLUSIONS Maltol not only increased cell viability but also attenuated DNA fragmentation. The results obtained here show that maltol has neuroprotective effects against hypoxia-induced neuroretinal cell damage in R28 cells, and its effects may act through the NF-κB and mitogen-activated protein kinase signaling pathways.
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Affiliation(s)
- Yookyung Song
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Samin Hong
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Yoko Iizuka
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Chan Yun Kim
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | - Gong Je Seong
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
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Krishnakumar V, Barathi D, Mathammal R, Balamani J, Jayamani N. Spectroscopic properties, NLO, HOMO-LUMO and NBO of maltol. Spectrochim Acta A Mol Biomol Spectrosc 2013; 121:245-253. [PMID: 24247097 DOI: 10.1016/j.saa.2013.10.068] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 10/09/2013] [Accepted: 10/17/2013] [Indexed: 06/02/2023]
Abstract
Maltol (3-hydroxy-2-methyl-4pyrone) is widely known as metal ions chelator with many practical applications in catalysis, medicine and food chemistry. The FTIR and FT-Raman spectra of maltol have been recorded in the region 4000-400 and 4000-50 cm(-1), respectively. The conformational analysis, optimized geometry, frequency and intensity of the vibrational bands of maltol were obtained by the density functional theory (DFT) with complete relaxation in the potential energy surface using 6-31G* basis set. The observed and the calculated frequencies are found to be in good agreement. The (1)H and (13)C NMR spectra have been recorded and (1)H and (13)C nuclear magnetic resonance chemical shifts of the molecule were also calculated using the gauge independent atomic orbital (GIAO) method and their respective linear correlations were obtained. The electronic properties HOMO and LUMO energies were measured. Thermodynamic properties (heat capacity, entropy and enthalpy) of the title compound were calculated. The Mulliken charges, the values of electric dipole moment (μ) of the molecule were computed using DFT calculations. The first order hyperpolarizability (βo) and related properties (β, αo and Δα) of both are calculated using B3LYP/6-31G* method on the finite-field approach. The calculated first hyperpolarizability shows that the molecules are an attractive molecule for future applications in non-linear optics. The intramolecular contacts have been interpreted using Natural Bond Orbital (NBO).
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Affiliation(s)
- V Krishnakumar
- Department of Physics, Periyar University, Salem 636011, India.
| | - D Barathi
- Department of Physics, N.K.R. Govt. Arts College (W), Namakkal 637001, India
| | - R Mathammal
- Department of Physics, Sri Sarada College for Women (Autonomous), Salem 636016, India
| | - J Balamani
- Department of Chemistry, Chikkanna Govt. Arts College, Tiruppur 641602, India
| | - N Jayamani
- Department of Physics, Vivekananda College of Arts and Sciences, Tiruchengode for Women (Autonomous), Namakkal 637205, India
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Minaiyan M, Mostaghel E, Mahzouni P. Preventive Therapy of Experimental Colitis with Selected iron Chelators and Anti-oxidants. Int J Prev Med 2012; 3:S162-9. [PMID: 22826760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Accepted: 11/20/2011] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Iron chelators, such as maltol and kojic acid, have antioxidant and anti-inflammatory properties. They may have beneficial effects on inflammatory bowel disease (IBD) because iron can develop and aggravate inflammation in IBD. In the present study, the effect of selected iron chelators and anti-oxidants were evaluated on a model of trinitrobenzene sulfonic acid (TNBS)-induced colitis. METHODS Colitis was induced with instillation of 75 mg/kg TNBS in 0.25 ml ethanol 50% via the anus in fasted male Wistar rats. The animals were assigned randomly to 12 groups (n = 6) and treated once daily, started 2 hours before colitis induction, with normal saline (5 ml/kg), maltol (70, 140, 280 mg/kg), kojic acid (75, 150, 300 mg/kg), vitamin E (400 mg/kg), deferiprone (L1) (150 mg/kg) and prednisolone (4 mg/kg) orally and deferoxamine (50 mg/kg) intraperitoneally for 5 days. In the sixth day, rats were scarified and colon tissues were assessed macroscopically and pathologically. RESULTS Maltol (280 mg/kg) was able to reduce colon weight / length ratio, ulcer index and total colitis index similar to prednisolone, deferoxamine and deferiprone as positive controls. However, kojic acid and vitamin E could not significantly alleviate macroscopic and/or pathologic features of inflammation in comparison to normal saline. CONCLUSIONS Maltol with the highest test dose was capable to protect against experimentally induced colitis. Kojic acid and vitamin E were not effective in this animal model of colon inflammation. More detailed studies are warranted to explore the mechanisms involved in anti-colitic property of maltol and to explain ineffectiveness of kojic acid and vitamin E.
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