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Tian F, Lu J, Qiao C, Wang C, Pang T, Guo L, Li J, Pang R, Xie H. Dissipation behavior and risk assessment of imidacloprid and its metabolites in apple from field to products. CHEMOSPHERE 2024; 359:142309. [PMID: 38735491 DOI: 10.1016/j.chemosphere.2024.142309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 05/05/2024] [Accepted: 05/09/2024] [Indexed: 05/14/2024]
Abstract
Pesticides play vital roles in controlling pests and boosting crop yields. Imidacloprid is widely used all over the world and may form in agricultural products. The presence of pesticide residues in apples raises serious health concerns. Understanding the residual fate of imidacloprid is critical for food safety and human health. In this study, the dissipation behavior, metabolism, household processing and risk assessment of imidacloprid and its metabolites in apple were investigated from filed to products. Field experiment results suggested that the half-lives of imidacloprid at 5 times the recommended dosage was 1.5 times that of the standard dosage. And the final residues of imidacloprid were less than the established maximum residue limits (MRLs). Clarification and simmering had little effect on the reduction the residues of imidacloprid and its metabolites. The calculated processing factors were lower than 1 for imidacloprid and its metabolites, implying that the residual ratios of imidacloprid and its metabolites in each steps of the food processing were reduced. The risk quotients were <1 for all Chinese people, indicating that acceptable risks associated with dietary exposure to imidacloprid in apple. However, the higher risks were observed in young people than adults, and females faced higher risks than males. Given high residue levels in pomace, imidacloprid and its metabolites should be further studied in commercial byproducts.
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Affiliation(s)
- Fajun Tian
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China; Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang, 453514, China.
| | - Junfeng Lu
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Chengkui Qiao
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China; Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang, 453514, China
| | - Caixia Wang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Tao Pang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Linlin Guo
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China; Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang, 453514, China
| | - Jun Li
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China
| | - Rongli Pang
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China; Zhongyuan Research Center, Chinese Academy of Agricultural Sciences, Xinxiang, 453514, China
| | - Hanzhong Xie
- Zhengzhou Fruit Research Institute, Chinese Academy of Agricultural Sciences, Zhengzhou, 450009, China.
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Fang J, Jiang P, Wang X, Qi Z, He X, Chen L, Guo Y, Xu X, Liu R, Li D. Thinned young apple powder prevents obesity-induced neuronal apoptosis via improving mitochondrial function of cerebral cortex in mice. J Nutr Biochem 2024; 126:109588. [PMID: 38266689 DOI: 10.1016/j.jnutbio.2024.109588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/13/2024] [Accepted: 01/18/2024] [Indexed: 01/26/2024]
Abstract
Mitochondrial dysfunction is one of the triggers for obesity-induced neuron apoptosis. Thinned young apple is getting more attention on account of the extensive biological activities because of rich polyphenols and polysaccharides. However, the neuroprotective effect of thinned young apple powder (YAP) is still unclear. The aim of the present study was to investigate the preventive effect of YAP on obesity-induced neuronal apoptosis. C57BL/6J male mice were divided into 5 groups, control (CON), high fat diet (HFD), HFD + orlistat (ORL), HFD + low-dose young apple powder (LYAP) and HFD + high-dose young apple powder (HYAP) groups and intervened for 12 weeks. It was found that the YAP effectively reduced body weight gain. Importantly, the levels of pro-apoptosis protein were lower in LYAP and HYAP groups than the HFD group, such as Bak/Bcl2 and cleaved caspase3/caspase3. Pathway analysis based on untargeted metabolomics suggested that YAP alleviated obesity-induced neuronal apoptosis by three main metabolic pathway including arginine metabolism, citrate cycle (TCA cycle) and glutathione metabolism. Meanwhile, YAP improved the protein expression of mitochondrial respiratory chain complex, maintained the homeostasis of TCA cycle intermediates, protected the balance of mitochondrial dynamics and alleviated lipid accumulation. In addition, the levels of several antioxidants in cerebral cortex were higher in HYAP group than the HFD group like superoxide dismutase (SOD) and catalase (CAT). In summary, YAP supplementation suppressed neuronal apoptosis in the cerebral cortex of HFD-induced obesity mice by improving mitochondrial function and inhibiting oxidative stress.
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Affiliation(s)
- Jiacheng Fang
- Institute of Nutrition & Health, Qingdao University, Qingdao, China; School of Public Health, Qingdao University, Qingdao, China
| | - Peng Jiang
- Red Cross Maternity and Child Health Care Hospital of Jiaozhou, Qingdao, China
| | - Xincen Wang
- Institute of Nutrition & Health, Qingdao University, Qingdao, China; School of Public Health, Qingdao University, Qingdao, China
| | - Zhongshi Qi
- Institute of Nutrition & Health, Qingdao University, Qingdao, China; School of Public Health, Qingdao University, Qingdao, China
| | - Xin He
- Institute of Nutrition & Health, Qingdao University, Qingdao, China; School of Public health and Emergency management, Southern University of Science and Technology, ShenZhen, China
| | - Lei Chen
- Institute of Nutrition & Health, Qingdao University, Qingdao, China; School of Public Health, Qingdao University, Qingdao, China
| | - Yurong Guo
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, China
| | - Xiaoyun Xu
- Red Cross Maternity and Child Health Care Hospital of Jiaozhou, Qingdao, China
| | - Run Liu
- Institute of Nutrition & Health, Qingdao University, Qingdao, China; School of Public Health, Qingdao University, Qingdao, China.
| | - Duo Li
- Institute of Nutrition & Health, Qingdao University, Qingdao, China; School of Public Health, Qingdao University, Qingdao, China.
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Zhang Y, Zeng M, Zhang X, Yu Q, Zeng W, Yu B, Gan J, Zhang S, Jiang X. Does an apple a day keep away diseases? Evidence and mechanism of action. Food Sci Nutr 2023; 11:4926-4947. [PMID: 37701204 PMCID: PMC10494637 DOI: 10.1002/fsn3.3487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 05/16/2023] [Accepted: 05/24/2023] [Indexed: 09/14/2023] Open
Abstract
Apples and their products exemplify the recently reemphasized link between dietary fruit intake and the alleviation of human disease. Their consumption does indeed improve human health due to their high phytochemical content. To identify potentially relevant articles from clinical trials, some epidemiological studies and meta-analyses, and in vitro and in vivo studies (cell cultures and animal models), PubMed was searched from January 1, 2012, to May 15, 2022. This review summarized the potential effects of apple and apple products (juices, puree, pomace, dried apples, extracts rich in apple bioactives and single apple bioactives) on health. Apples and apple products have protective effects against cardiovascular diseases, cancer, as well as mild cognitive impairment and promote hair growth, healing of burn wounds, improve the oral environment, prevent niacin-induced skin flushing, promote the relief of UV-induced skin pigmentation, and improve the symptoms of atopic dermatitis as well as cedar hay fever among others. These effects are associated with various mechanisms, such as vascular endothelial protection, blood lipids lowering, anti-inflammatory, antioxidant, antiapoptotic, anti-invasion, and antimetastatic effects. Meanwhile, it has provided an important reference for the application and development of medicine, nutrition, and other fields.
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Affiliation(s)
- Yue Zhang
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Miao Zeng
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Xiaolu Zhang
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Qun Yu
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Wenyun Zeng
- Department of PathologyTianjin Union Medical CenterTianjinChina
| | - Bin Yu
- School of International EducationTianjin University of Chinese MedicineTianjinChina
| | - Jiali Gan
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Shiwu Zhang
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
- Department of PathologyTianjin Union Medical CenterTianjinChina
| | - Xijuan Jiang
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
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Zhang YJ, Huang Q, Li AR, Gan ZY, Zeng JK, Kai WB, Chen CY, Chen JY. Apple polyphenols delay postharvest senescence and quality deterioration of 'Jinshayou' pummelo fruit during storage. FRONTIERS IN PLANT SCIENCE 2023; 13:1117106. [PMID: 36743559 PMCID: PMC9893410 DOI: 10.3389/fpls.2022.1117106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 12/28/2022] [Indexed: 06/18/2023]
Abstract
INTRODUCTION Apple polyphenols (AP), derived from the peel of mature-green apples, are widely used as natural plant-derived preservatives in the postharvest preservation of numerous horticultural products. METHODS The goal of this research was to investigate how AP (at 0.5% and 1.0%) influences senescence-related physiological parameters and antioxidant capacity of 'Jinshayou' pummelo fruits stored at 20°C for 90 d. RESULTS The treating pummelo fruit with AP could effectively retard the loss of green color and internal nutritional quality, resulting in higher levels of total soluble solid (TSS) content, titratable acidity (TA) content and pericarp firmness, thus maintaining the overall quality. Concurrently, AP treatment promoted the increases in ascorbic acid, reduced glutathione, total phenols (TP) and total flavonoids (TF) contents, increased the scavenging rates of 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) and hydroxyl radical (•OH), and enhanced the activities of superoxide dismutase (SOD), catalase, peroxidase, ascorbate peroxidase (APX), and glutathione reductase (GR) as well as their encoding genes expression (CmSOD, CmCAT, CmPOD, CmAPX, and CmGR), reducing the increases in electrolyte leakage, malondialdehyde content and hydrogen peroxide level, resulting in lower fruit decay rate and weight loss rate. The storage quality of 'Jinshayou' pummelo fruit was found to be maintained best with a 1.0% AP concentration. CONCLUSION AP treatment can be regarded as a promising and effective preservative of delaying quality deterioration and improving antioxidant capacity of 'Jinshayou' pummelo fruit during storage at room temperature.
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Rodríguez-Vera D, Abad-García A, Vargas-Mendoza N, Pinto-Almazán R, Farfán-García ED, Morales-González JA, Soriano-Ursúa MA. Polyphenols as potential enhancers of stem cell therapy against neurodegeneration. Neural Regen Res 2022; 17:2093-2101. [PMID: 35259814 PMCID: PMC9083162 DOI: 10.4103/1673-5374.335826] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The potential of polyphenols for treating chronic-degenerative diseases (particularly neurodegenerative diseases) is attractive. However, the selection of the best polyphenol for each treatment, the mechanisms by which they act, and their efficacy are frequently discussed. In this review, the basics and the advances in the field, as well as suggestions for using natural and synthetic polyphenols alone or in a combinatorial strategy with stem cell assays, are compiled and discussed. Thus, stem cells exhibit several responses when polyphenols are added to their environment, which could provide us with knowledge for advancing the elucidation of the origin of neurodegeneration. But also, polyphenols are being included in the innovative strategies of novel therapies for treating neurodegenerative diseases as well as metabolic diseases related to neurodegeneration. In this regard, flavonoid compounds are suggested as the best natural polyphenols due to their several mechanisms for acting in ameliorative effects; but increasing reports are involving other polyphenols. Even if some facts limiting bioactivity prevent them from conventional use, some natural polyphenols and derivatives hold the promise for being improved compounds, judged by their induced effects. The current results suggest polyphenols as enhancers of stem cell therapy against the targeted diseases.
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Affiliation(s)
- Diana Rodríguez-Vera
- Sección de Estudios de Posgrado e Investigación. Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, México
| | - Antonio Abad-García
- Sección de Estudios de Posgrado e Investigación. Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, México
| | - Nancy Vargas-Mendoza
- Sección de Estudios de Posgrado e Investigación. Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, México
| | - Rodolfo Pinto-Almazán
- Unidad de Investigación, Hospital Regional de Alta Especialidad Ixtapaluca, Carretera Federal México-Puebla km 34.5, State of México, México
| | - Eunice D. Farfán-García
- Sección de Estudios de Posgrado e Investigación. Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, México
| | - José A. Morales-González
- Sección de Estudios de Posgrado e Investigación. Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, México
- Correspondence to: José A. Morales-González, ;
Marvin A. Soriano-Ursúa, .
| | - Marvin A. Soriano-Ursúa
- Sección de Estudios de Posgrado e Investigación. Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, México
- Correspondence to: José A. Morales-González, ;
Marvin A. Soriano-Ursúa, .
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Wang F, Zhang K, Zhai M, Lin X, Hu Y, Feng L, Yang J, Yu H, Wu C. Protective effect and mechanism of Lycium barbarum L. polyphenol on cognitive impairment induced by ethanol in mice. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2022; 100:154033. [PMID: 35316727 DOI: 10.1016/j.phymed.2022.154033] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 02/25/2022] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Chronic excessive ethanol consumption damages the central nervous system and causes neurobehavioral changes, such as cognitive impairment, which is related to oxidative stress and inhibition of neurogenesis in the hippocampus. It is known that promoting neurogenesis improves learning memory, anxiety and depression. Lycium barbarum L. polyphenol (LBP) is the main active ingredient of Lycium barbarum L., which has excellent neuroprotective effects. However, the effects and mechanisms of LBP on ethanol-induced cognitive impairment are unclear. PURPOSE To assess the effects and mechanisms of LBP on ethanol-induced cognitive impairment in mice. METHODS Eight-weeks-old adult C57BL/6J mice were allowed to drink ethanol (10%) to establish a model of ethanol-induced cognitive impairment. From the 29th day of LBP (25, 50, 100, 200, 400 mg/kg, intragastric administration), the locomotor activity, novel object recognition (NOR), Y maze and Morris water maze (MWM) were sequentially performed to investigate the effect of LBP on ethanol-induced cognitive impairment in mice. Next, enzyme-linked immunosorbent assay, immunofluorescence, and western blotting were used to study the underlying mechanism of LBP on ethanol-induced cognitive impairment. RESULTS LBP significantly decreased the escape latency and increased the number of crossings of the original platform in MWM, increased the spontaneous alteration behavior in the Y maze, and increased the preference index in the NOR in ethanol-induced mice. Notably, LBP significantly promoted the proliferation of neural stem cells, neural progenitor cells and neuroblasts, and increased the proportion of activated NSCs in mice with ethanol-induced cognitive impairment. Similarly, LBP significantly increased the number of newborn immature neurons and mature neurons. Moreover, LBP increased the levels of nuclear factor erythroid2-related factor 2 (Nrf2) and the downstream heme oxygenase-1(HO-1) protein expression, which led to a decrease of oxidative stress levels. CONCLUSION LBP significantly improves cognitive impairment in ethanol-induced mice, which is attributed to the promotion of hippocampal neurogenesis and reduction of oxidative stress.
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Affiliation(s)
- Fan Wang
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Kuo Zhang
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, China; Tianjin UBasio Biotechnology Group, Tianjin 300457, China
| | - Mengying Zhai
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xin Lin
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Yuxuan Hu
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Lijin Feng
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Jingyu Yang
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Hongjian Yu
- Tianjin UBasio Biotechnology Group, Tianjin 300457, China.
| | - Chunfu Wu
- Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang 110016, China.
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Bian H, Wu Y, Cui Z, Zheng H, Li Y, Zou D. Study on the autophagy-related mechanism of puerarin in improving the cognitive impairment induced by alcohol in female mice. Brain Inj 2022; 36:137-145. [PMID: 35138214 DOI: 10.1080/02699052.2022.2037712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PRIMARY OBJECTIVE This study aimed to investigate the effects of low-, medium-, and high-dose puerarin on cognitive impairment induced by 50% alcohol in mice and revealed the role of autophagy-related signaling pathways (mTOR and JNK pathways) in this process. RESEARCH DESIGN The alcohol-induced brain injury model was treated with different concentrations of puerarin. The cognitive function of mice was evaluated by the behavioral test, and the changes of target proteins in hippocampus of each experimental group were detected. METHODS AND PROCEDURES 40 female Kunming mice were randomly divided into 5 groups. The cognitive ability of mice was tested by Morris water maze, the morphological changes in the CA1 area of hippocampus were observed by HE staining, and the target proteins in hippocampus were measured by WB and IHC. MAIN OUTCOMES AND RESULTS Compared with the 50% alcohol group, the expression of p-mTOR/mTOR and p-4E-BP1/4E-BP1 in hippocampus was significantly decreased, while the expression of p-JNK/JNK, Beclin1, and LC3 was significantly increased in the medium- and high-dose puerarin groups. CONCLUSIONS Puerarin could improve the cognitive impairment induced by 50% alcohol. The mTOR and JNK pathways related to autophagy might be involved in this process.
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Affiliation(s)
- Huanhuan Bian
- Department of Pathophysiology, Shenyang Medical College, Shenyang, Liaoning, PR China
| | - Yi Wu
- Department of Pathophysiology, Shenyang Medical College, Shenyang, Liaoning, PR China
| | - Zhengguo Cui
- Department of Environmental Health, University of Fukui School of Medical Science, Fukui, Japan
| | - Heyu Zheng
- Clinical Medicine Major Grade 2018, Shenyang Medical College, Shenyang,Liaoning, PR China
| | - Yanyi Li
- Clinical Medicine Major Grade 2018, Shenyang Medical College, Shenyang,Liaoning, PR China
| | - Dan Zou
- Department of Immunology, Shenyang Medical College, Shenyang, Liaoning, PR China
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Dynamics of Phloridzin and Related Compounds in Four Cultivars of Apple Trees during the Vegetation Period. Molecules 2021; 26:molecules26133816. [PMID: 34206687 PMCID: PMC8270342 DOI: 10.3390/molecules26133816] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 06/11/2021] [Accepted: 06/16/2021] [Indexed: 01/14/2023] Open
Abstract
Apple trees (Malus domestica Borgh) are a rich source of dihydrochalcones, phenolic acids and flavonoids. Considering the increasing demand for these phytochemicals with health-benefitting properties, the objective of this study was to evaluate the profile of the main bioactive compounds—phloridzin, phloretin, chlorogenic acid and rutin—in apple tree bark, leaves, flower buds and twigs. The variety in the phenolic profiles of four apple tree cultivars was monitored during the vegetation period from March to September using chromatography analysis. Phloridzin, the major glycoside of interest, reached the highest values in the bark of all the tested cultivars in May (up to 91.7 ± 4.4 mg g−1 of the dried weight (DW), cv. ‘Opal’). In the leaves, the highest levels of phloridzin were found in cv. ‘Opal’ in May (82.5 ± 22.0 mg g−1 of DW); in twigs, the highest levels were found in cv. ‘Rozela’ in September (52.4 ± 12.1 mg g−1 of DW). In the flower buds, the content of phloridzin was similar to that in the twigs. Aglycone phloretin was found only in the leaves in relatively low concentrations (max. value 2.8 ± 1.4 mg g−1 of DW). The highest values of rutin were found in the leaves of all the tested cultivars (10.5 ± 2.9 mg g−1 of DW, cv. ‘Opal’ in September); the concentrations in the bark and twigs were much lower. The highest content of chlorogenic acid was found in flower buds (3.3 ± 1.0 mg g−1 of DW, cv. ‘Rozela’). Whole apple fruits harvested in September were rich in chlorogenic acid and phloridzin. The statistical evaluation by Scheffe’s test confirmed the significant difference of cv. ‘Rozela’ from the other tested cultivars. In conclusion, apple tree bark, twigs, and leaves were found to be important renewable resources of bioactive phenolics, especially phloridzin and rutin. The simple availability of waste plant material can therefore be used as a rich source of phenolic compounds for cosmetics, nutraceuticals, and food supplement preparation.
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Kamdi SP, Raval A, Nakhate KT. Phloridzin attenuates lipopolysaccharide-induced cognitive impairment via antioxidant, anti-inflammatory and neuromodulatory activities. Cytokine 2021; 139:155408. [PMID: 33476914 DOI: 10.1016/j.cyto.2020.155408] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 12/02/2020] [Accepted: 12/13/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Lipopolysaccharide (LPS) is known to produce neuroinflammation and memory impairment. Although phloridzin (a phenolic phytoconstituent) shows antioxidant- and anti-inflammatory activities, its ameliorative potential in LPS-mediated neuroinflammation and memory dysfunction remains unexplored. OBJECTIVES To investigate the protective effect of phloridzin against LPS-mediated memory impairment and neuroinflammation in mice. METHODS Different groups of mice were treated with LPS (250 μg/kg) via intraperitoneal (ip) route to induce cognitive impairments. The animals were administered with phloridzin (10-20 mg/kg, oral) or donepezil (1 mg/kg, intraperitoneal), and memory functions were evaluated by Morris water maze (MWM) and Y-maze. At the end of the behavioral experiments, the animals were sacrificed and different biochemical parameters like acetylcholinesterase (AChE), brain derived neurotropic factor (BDNF), tumor necrosis factor (TNF-α), interleukin-6 (IL-6), superoxide dismutase (SOD) and glutathione (GSH) concentration in the hippocampus and the cerebral cortex were estimated. RESULTS While LPS administered animals showed significantly decreased memory retention in both MWM and Y maze, a significant reversal in all the parameters were observed following treatment with phloridzin. LPS-treated animals showed significantly decreased level of antioxidants (SOD and GSH), neurotropic factor (BDNF) and cholinergic transmission (increased AChE) and increased levels of inflammatory/oxidative markers (TNF-α, IL-6 and MDA) in hippocampus and cortex. These changes were alleviated after the treatment with phloridzin. CONCLUSIONS Phloridzin may have neuroprotective role against LPS-induced neuroinflammation and memory impairment by virtue of its antioxidant, anti-inflammatory, and enhanced cholinergic signalling activity in the hippocampus and cerebral cortex.
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Affiliation(s)
- Sandesh P Kamdi
- Faculty of Pharmacy, Pacific Academy of Higher Education and Research University, Udaipur, Rajasthan, India.
| | - Amit Raval
- Faculty of Pharmacy, Pacific Academy of Higher Education and Research University, Udaipur, Rajasthan, India
| | - Kartik T Nakhate
- National Institute of Pharmaceutical Education and Research (NIPER), Export Promotions Industrial Park, Industrial Area, Hajipur, Dist: Vaishali 844102, Bihar, India
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