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Hassani S, Esmaeili A. The neuroprotective effects of ferulic acid in toxin-induced models of Parkinson's disease: A review. Ageing Res Rev 2024; 97:102299. [PMID: 38604452 DOI: 10.1016/j.arr.2024.102299] [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: 12/16/2023] [Revised: 03/04/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Parkinson's disease is predominantly caused by dopaminergic neuron loss in the substantia nigra pars compacta and the accumulation of alpha-synuclein protein. Though the general consensus is that several factors, such as aging, environmental factors, mitochondrial dysfunction, accumulations of neurotoxic alpha-synuclein, malfunctions of the lysosomal and proteasomal protein degradation systems, oxidative stress, and neuroinflammation, are involved in the neurodegeneration process of Parkinson's disease, the precise mechanism by which all of these factors are triggered remains unknown. Typically, neurotoxic compounds such as rotenone, 6-hydroxydopamine, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), 1-methyl 4-phenyl pyridinium (mpp+), paraquat, and maneb are used to Preclinical models of Parkinson's disease Ferulic acid is often referred to by its scientific name, 4-hydroxy-3-methoxycinnamic acid (C10H10O4), and is found naturally in cereals, fruits, vegetables, and bee products. This substance exhibits neuroprotective effects against Parkinson's disease because of its intriguing potential, which includes anti-inflammatory and antioxidant qualities. This review goes into additional detail about Parkinson's disease and the neuroprotective properties of ferulic acid that may help prevent the condition.
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Affiliation(s)
- Samira Hassani
- Department of Plant and Animal Biology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Abolghasem Esmaeili
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran.
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Zhang L, Yang C, Zhao Y, Yang Z, Meng X, Yan D. Comparative pharmacokinetic analysis of six major bioactive constituents using UPLC-MS/MS in samples isolated from normal and diabetic nephropathy rats after oral administration of Gushen Jiedu capsule. J Pharm Biomed Anal 2023; 235:115638. [PMID: 37633162 DOI: 10.1016/j.jpba.2023.115638] [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: 04/21/2023] [Revised: 07/07/2023] [Accepted: 08/07/2023] [Indexed: 08/28/2023]
Abstract
Berberine, palmatine, physcion, rhein, calycosin-7-O-glucoside, and ferulic acid are six major active consituents that are present in Gushen Jiedu capsule (GSJD) extracts. The aim of this study was to determine the pharmacokinetics of the six active consituents in vivo by a rapid, sensitive, and precise UPLC-MS/MS method, which were compared between normal and diabetic nephropathy (DN) rats. Good separation of the target analytes and internal standards (ketoprofen and puerarin) was obtained on a Waters BEH C18 UPLC column with a mobile phase of 0.1 % formic acid acetonitrile-0.1 % formic acid water. All the calibration curves showed good linearity with a regression coefficient (r2) of ≥ 0.9908. The lower limits of quantification (LLOQ) for berberine, palmatine, physcion, rhein, calycosin-7-O-glucoside, and ferulic acid were 20, 2.5, 20, 20, 2.5, and 2.5 ng/mL, respectively. The relative standard deviations (RSDs) of intra-day and inter-day precision were all within 12.66 %, and the relative errors of intra-day and inter-day accuracy ranged from - 15.00 to 14.93 %. Good extraction recovery and matrix effects were obtained. The stability study confirmed the stability of the six analytes (RSD < 15 %). Finally, the data showed that the pharmacokinetic parameters (especially CLz/F, AUC and Tmax) of the six target analytes in DN rats were significantly different from those in normal rats. PK studies under pathological conditions could provide new thoughts to elucidate the underlying mechanism of GSJD and promote the clinical development of GSJD to treat DN.
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Affiliation(s)
- Lei Zhang
- Department of Pharmacy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China; Beijing Key Laboratory of Bio-characteristic Profiling for Evaluation of Rational Drug Use, Beijing, China
| | - Chunjing Yang
- Department of Pharmacy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China; Beijing Key Laboratory of Bio-characteristic Profiling for Evaluation of Rational Drug Use, Beijing, China
| | - Yidan Zhao
- Department of Pharmacy, Fuwai Central China Cardiovascular Hospital, Zhengzhou, China
| | - Zhirui Yang
- Beijing Key Laboratory of Bio-characteristic Profiling for Evaluation of Rational Drug Use, Beijing, China; Beijing Institute of Clinical Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xintong Meng
- Beijing Key Laboratory of Bio-characteristic Profiling for Evaluation of Rational Drug Use, Beijing, China
| | - Dan Yan
- Beijing Institute of Clinical Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing, China; Department of Pharmacy, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
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Tomou EM, Papakyriakopoulou P, Skaltsa H, Valsami G, Kadoglou NPE. Bio-Actives from Natural Products with Potential Cardioprotective Properties: Isolation, Identification, and Pharmacological Actions of Apigenin, Quercetin, and Silibinin. Molecules 2023; 28:molecules28052387. [PMID: 36903630 PMCID: PMC10005323 DOI: 10.3390/molecules28052387] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/23/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023] Open
Abstract
Cardiovascular diseases (CVDs) are the leading cause of morbidity and mortality worldwide. As a result, pharmaceutical and non-pharmaceutical interventions modifying risk factors for CVDs are a top priority of scientific research. Non-pharmaceutical therapeutical approaches, including herbal supplements, have gained growing interest from researchers as part of the therapeutic strategies for primary or secondary prevention of CVDs. Several experimental studies have supported the potential effects of apigenin, quercetin, and silibinin as beneficial supplements in cohorts at risk of CVDs. Accordingly, this comprehensive review focused critically on the cardioprotective effects/mechanisms of the abovementioned three bio-active compounds from natural products. For this purpose, we have included in vitro, preclinical, and clinical studies associated with atherosclerosis and a wide variety of cardiovascular risk factors (hypertension, diabetes, dyslipidemia, obesity, cardiac injury, and metabolic syndrome). In addition, we attempted to summarize and categorize the laboratory methods for their isolation and identification from plant extracts. This review unveiled many uncertainties which are still unexplored, such as the extrapolation of experimental results to clinical practice, mainly due to the small clinical studies, heterogeneous doses, divergent constituents, and the absence of pharmacodynamic/pharmacokinetic analyses.
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Affiliation(s)
- Ekaterina-Michaela Tomou
- Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece
| | - Paraskevi Papakyriakopoulou
- Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece
| | - Helen Skaltsa
- Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece
| | - Georgia Valsami
- Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece
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4
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Wu Q, Liang Y, Kong Y, Zhang F, Feng Y, Ouyang Y, Wang C, Guo Z, Xiao J, Feng N. Role of glycated proteins in vivo: Enzymatic glycated proteins and non-enzymatic glycated proteins. Food Res Int 2022; 155:111099. [DOI: 10.1016/j.foodres.2022.111099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 02/24/2022] [Accepted: 03/03/2022] [Indexed: 11/04/2022]
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5
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Jiang YC, Han X, Dou JY, Yuan MH, Zhou MJ, Cui ZY, Lian LH, Nan JX, Zhang X, Wu YL. Protective role of Siberian onions against toxin-induced liver dysfunction: an insight into health-promoting effects. Food Funct 2022; 13:4678-4690. [PMID: 35377371 DOI: 10.1039/d1fo04404d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Siberian onions (SOs) are delicious wild vegetables. Their taste is most unique, not only like scallions but also like leeks or garlic. They also have a traditional medicinal value for anti-inflammation, anti-oxidation, and anti-pyretic analgesia, particularly facilitating hepatoprotective effects. The current study investigates the potential mechanism of SOs against toxin-induced liver dysfunction. BALB/c mice were administrated with SO or silymarin by oral gavage for one week, followed by injecting carbon tetrachloride (CCl4) to induce hepatic fibrosis. The effect of SO against hepatic fibrosis was evaluated by examining the liver tissue for serum transaminase, oxidative stress, extracellular matrix, histological alterations, cytokine levels, and apoptosis. In vitro, HSC-T6 cells were cultured with the supernatant from Raw 264.7 cells stimulated with lipopolysaccharides, followed by SO extracts or Niclosamide (Signal Transducer and Activator of Transcription 3 (STAT3) inhibitor) at indicated time periods and doses. SO decreased serum transaminase levels and oxidative stress, and regulated the balance of ECM in CCl4-induced mice, including α-SMA, collagen-I and TIMP-1. SO reduced the release of inflammatory factors and regulated apoptosis-associated proteins, which is related to the inhibition of STAT3 phosphorylation. Moreover, SO reduced the positive expressions of α-SMA and NLRP3 by inhibiting STAT3 phosphorylation in activated HSCs. SO could show health-promoting effects for liver dysfunction by alleviating hepatic fibrogenesis, apoptosis and inflammation in the development of hepatic fibrosis potential depending on the STAT3 signaling pathway.
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Affiliation(s)
- Yu-Chen Jiang
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, Jilin Province 133002, China.
| | - Xin Han
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, Jilin Province 133002, China. .,Chinese Medicine Processing Centre, College of pharmacy, Zhejiang Chinese Medical University, China
| | - Jia-Yi Dou
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, Jilin Province 133002, China.
| | - Ming-Hui Yuan
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, Jilin Province 133002, China.
| | - Mei-Jie Zhou
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, Jilin Province 133002, China.
| | - Zhen-Yu Cui
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, Jilin Province 133002, China.
| | - Li-Hua Lian
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, Jilin Province 133002, China.
| | - Ji-Xing Nan
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, Jilin Province 133002, China. .,Clinical Research Center, Affiliated Hospital of Yanbian University, Yanji, Jilin Province 133002, China
| | - Xian Zhang
- Agricultural College, Yanbian University, Yanji, Jilin Province 133002, China.
| | - Yan-Ling Wu
- Key Laboratory for Traditional Chinese Korean Medicine of Jilin Province, College of Pharmacy, Yanbian University, Yanji, Jilin Province 133002, China.
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Sarmah S, Roy AS. A review on prevention of glycation of proteins: Potential therapeutic substances to mitigate the severity of diabetes complications. Int J Biol Macromol 2022; 195:565-588. [DOI: 10.1016/j.ijbiomac.2021.12.041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 12/03/2021] [Accepted: 12/05/2021] [Indexed: 12/21/2022]
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Ferulic acid: A review of its pharmacology, pharmacokinetics and derivatives. Life Sci 2021; 284:119921. [PMID: 34481866 DOI: 10.1016/j.lfs.2021.119921] [Citation(s) in RCA: 178] [Impact Index Per Article: 59.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/17/2021] [Accepted: 08/25/2021] [Indexed: 12/14/2022]
Abstract
Ferulic acid, a kind of phenolic substance widely existing in plants, is an important active component of many traditional Chinese medicines. So far, it has been proved that ferulic acid has a variety of biological activities, especially in oxidative stress, inflammation, vascular endothelial injury, fibrosis, apoptosis and platelet aggregation. Many studies have shown that ferulic acid can inhibit PI3K/AKT pathway, the production of ROS and the activity of aldose reductase. The anti-inflammatory effect of ferulic acid is mainly related to the levels of PPAR γ, CAM and NF-κ B and p38 MAPK signaling pathways. Ferulic acid not only protects vascular endothelium by ERK1/2 and NO/ET-1 signal, but also plays an anti-fibrosis role by TGF-β/Smad and MMPs/TIMPs system. Moreover, ferulic acid has ant-apoptotic and anti-platelet effects. In addition to the pharmacological effects of ferulic acid, its pharmacokinetics and derivatives were also discussed in this paper. This review provides the latest summary of the latest research on ferulic acid.
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Khanam A, Ahmad S, Husain A, Rehman S, Farooqui A, Yusuf MA. Glycation and Antioxidants: Hand in the Glove of Antiglycation and Natural Antioxidants. Curr Protein Pept Sci 2021; 21:899-915. [PMID: 32039678 DOI: 10.2174/1389203721666200210103304] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/09/2019] [Accepted: 11/30/2019] [Indexed: 12/17/2022]
Abstract
The non-enzymatic interaction of sugar and protein resulting in the formation of advanced glycation end products responsible for cell signaling alterations ultimately leads to the human chronic disorders such as diabetes mellitus, cardiovascular diseases, cancer, etc. Studies suggest that AGEs upon interaction with receptors for advanced glycation end products (RAGE) result in the production of pro-inflammatory molecules and free radicals that exert altered gene expression effect. To date, many studies unveiled the potent role of synthetic and natural agents in inhibiting the glycation reaction at a lesser or greater extent. This review focuses on the hazards of glycation reaction and its inhibition by natural antioxidants, including polyphenols.
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Affiliation(s)
- Afreen Khanam
- IIRC-1, Laboratory of Glycation Biology and Metabolic Disorders, Integral University, Lucknow, India
| | - Saheem Ahmad
- IIRC-1, Laboratory of Glycation Biology and Metabolic Disorders, Integral University, Lucknow, India
| | - Arbab Husain
- IIRC-1, Laboratory of Glycation Biology and Metabolic Disorders, Integral University, Lucknow, India
| | - Shahnawaz Rehman
- IIRC-1, Laboratory of Glycation Biology and Metabolic Disorders, Integral University, Lucknow, India
| | - Alvina Farooqui
- Department of Bioengineering, Integral University, Lucknow, India
| | - Mohd Aslam Yusuf
- Department of Bioengineering, Integral University, Lucknow, India
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Lin CE, Lin PY, Yang WC, Huang YS, Lin TY, Chen CM, Chen HS, Lee JA, Chen SM. Evaluation of the nephrotoxicity and safety of low-dose aristolochic acid, extending to the use of Xixin (Asurum), by determination of methylglyoxal and d-lactate. JOURNAL OF ETHNOPHARMACOLOGY 2021; 272:113945. [PMID: 33617966 DOI: 10.1016/j.jep.2021.113945] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 01/18/2021] [Accepted: 02/14/2021] [Indexed: 06/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Most Aristolochiaceae plants are prohibited due to aristolochic acid nephropathy (AAN), except Xixin (Asarum spp.). Xixin contains trace amounts of aristolochic acid (AA) and is widely used in Traditional Chinese Medicine. Methylglyoxal and d-lactate are regarded as biomarkers for nephrotoxicity. AIM OF THE STUDY The use of Xixin (Asarum spp.) is essential and controversial. This study aimed to evaluate tubulointerstitial injury and interstitial renal fibrosis by determining urinary methylglyoxal and d-lactate after withdrawal of low-dose AA in a chronic mouse model. MATERIALS AND METHODS C3H/He mice in the AA group (n = 24/group) were given ad libitum access to distilled water containing 3 μg/mL AA (0.5 mg/kg/day) for 56 days and drinking water from days 57 to 84. The severity of tubulointerstitial injury and fibrosis were evaluated using the tubulointerstitial histological score (TIHS) and Masson's trichrome staining. Urinary and serum methylglyoxal were determined by high-performance liquid chromatography (HPLC); urinary d-lactate were determined by column-switching HPLC. RESULTS After AA withdrawal, serum methylglyoxal in the AA group increased from day 56 (429.4 ± 48.3 μg/L) to 84 (600.2 ± 99.9 μg/L), and peaked on day 70 (878.3 ± 171.8 μg/L; p < 0.05); TIHS and fibrosis exhibited similar patterns. Urinary methylglyoxal was high on day 56 (3.522 ± 1.061 μg), declined by day 70 (1.583 ± 0.437 μg) and increased by day 84 (2.390 ± 0.130 μg). Moreover, urinary d-lactate was elevated on day 56 (82.10 ± 18.80 μg) and higher from day 70 (201.10 ± 90.82 μg) to 84 (193.28 ± 61.32 μg). CONCLUSIONS Methylglyoxal is induced after AA-induced tubulointerstitial injury, so methylglyoxal excretion and metabolism may be a detoxification and repair strategy. A low cumulative AA dose is the key factor that limits tubulointerstitial injury and helps to repair. Thus, AA-containing herbs, especially Xixin, should be used at low doses for short durations (less than one month).
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Affiliation(s)
- Chia-En Lin
- School of Pharmacy, College of Pharmacy, Taipei Medical University, No.250 Wu-Hsing Street, Taipei, 110, Taiwan.
| | - Po-Yeh Lin
- School of Pharmacy, College of Pharmacy, Taipei Medical University, No.250 Wu-Hsing Street, Taipei, 110, Taiwan.
| | - Wen-Chi Yang
- School of Pharmacy, College of Pharmacy, Taipei Medical University, No.250 Wu-Hsing Street, Taipei, 110, Taiwan.
| | - Yu-Shen Huang
- School of Pharmacy, College of Pharmacy, Taipei Medical University, No.250 Wu-Hsing Street, Taipei, 110, Taiwan.
| | - Tzu-Yao Lin
- School of Pharmacy, College of Pharmacy, Taipei Medical University, No.250 Wu-Hsing Street, Taipei, 110, Taiwan.
| | - Chien-Ming Chen
- Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan.
| | - Hung-Shing Chen
- Graduate Institute of Electro-optical Engineering, National Taiwan University of Science and Technology, No.43, Keelung Rd., Sec.4, Da'an Dist., Taipei, Taiwan.
| | - Jen-Ai Lee
- School of Pharmacy, College of Pharmacy, Taipei Medical University, No.250 Wu-Hsing Street, Taipei, 110, Taiwan.
| | - Shih-Ming Chen
- School of Pharmacy, College of Pharmacy, Taipei Medical University, No.250 Wu-Hsing Street, Taipei, 110, Taiwan.
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Petropoulos SA, Di Gioia F, Polyzos N, Tzortzakis N. Natural Antioxidants, Health Effects and Bioactive Properties of Wild Allium Species. Curr Pharm Des 2020; 26:1816-1837. [PMID: 32013820 DOI: 10.2174/1381612826666200203145851] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 12/16/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND There is an increasing interest from the pharmaceutical and food industry in natural antioxidant and bioactive compounds derived from plants as substitutes for synthetic compounds. The genus Allium is one of the largest genera, with more than 900 species, including important cultivated and wild species, having beneficial health effects. OBJECTIVE The present review aims to unravel the chemical composition of wild Allium species and their healthrelated effects, focusing on the main antioxidant compounds. For this purpose, a thorough study of the literature was carried out to compile reports related to health effects and the principal bioactive compounds. Considering the vast number of species, this review is divided into subsections where the most studied species are presented, namely Allium ampeloprasum, A. flavum, A. hookeri, A. jesdianum, A. neapolitanum, A. roseum, A. stipitatum, A. tricoccum, and A. ursinum, with an additional composite section for less studied species. METHODS The information presented in this review was obtained from worldwide accepted databases such as Scopus, ScienceDirect, PubMed, Google Scholar and Researchgate, using as keywords the respective names of the studied species (both common and Latin names) and the additional terms of"antioxidants" "health effects" and "bioactive properties". CONCLUSION The genus Allium includes several wild species, many of which are commonly used in traditional and folklore medicine while others are lesser known or are of regional interest. These species can be used as sources of natural bioactive compounds with remarkable health benefits. Several studies have reported these effects and confirmed the mechanisms of action in several cases, although more research is needed in this field. Moreover, considering that most of the studies refer to the results obtained from species collected in the wild under uncontrolled conditions, further research is needed to elucidate the effects of growing conditions on bioactive compounds and to promote the exploitation of this invaluable genetic material.
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Affiliation(s)
- Spyridon A Petropoulos
- Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, N. Ionia, Magnissia, Greece
| | - Francesco Di Gioia
- Department of Plant Science, Pennsylvania State University, Pennsylvania, United States
| | - Nikos Polyzos
- Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, N. Ionia, Magnissia, Greece
| | - Nikos Tzortzakis
- Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Limassol, Cyprus
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Drosera tokaiensis extract containing multiple phenolic compounds inhibits the formation of advanced glycation end-products. Arch Biochem Biophys 2020; 693:108586. [DOI: 10.1016/j.abb.2020.108586] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 12/17/2022]
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Zhou Q, Cheng KW, Xiao J, Wang M. The multifunctional roles of flavonoids against the formation of advanced glycation end products (AGEs) and AGEs-induced harmful effects. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.06.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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13
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Pyun BJ, Kim YS, Lee IS, Jung DH, Kim JH, Kim JS. Osteomeles schwerinae Extract and Its Major Compounds Inhibit Methylglyoxal-Induced Apoptosis in Human Retinal Pigment Epithelial Cells. Molecules 2020; 25:E2605. [PMID: 32503323 PMCID: PMC7321095 DOI: 10.3390/molecules25112605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 05/28/2020] [Accepted: 05/31/2020] [Indexed: 01/06/2023] Open
Abstract
The accumulation and formation of advanced glycation end products (AGEs) are related to diabetes and age-related disease. Osteomeles schwerinae C. K. Schneid. (Rosaceae, OSSC) is used traditionally for the treatment of various diseases in Asia. Previous studies have shown that OSSC elicits preventive effects in an in vivo model of diabetes. This study was to evaluate the antiapoptotic effects of dried leaves and twigs of OSSC extract and its major compounds in ARPE-19 cells-spontaneously arising human retinal pigment epithelial cells-under diabetic conditions. To examine the effects of an OSSC extract and its active compounds (acetylvitexin, hyperoside and quercitrin) on apoptosis in methylglyoxal (MG, the active precursor in the formation of AGEs)-treated ARPE-19 cells and the mechanism by which these effects occur, apoptosis was measured using flow cytometry analysis. Protein expression levels of phospho-p53 (p-p53), Bax and Bcl-2 were determined by western blot analyses. The OSSC extract inhibited apoptosis in MG-treated ARPE-19 cells in a dose-dependent manner. The major compounds also reduced the rate of apoptosis. Both the extract and major compounds also inhibited the expression of p-p53 and Bax and increased the levels of Bcl-2 that had been previously reduced by MG treatment. The OSSC extract (0.1 μg/mL) and its major compounds (0.01 μM) attenuated apoptosis in ARPE-19 cells under toxic diabetic conditions by downregulating of expression of p-p53 and Bax. OSSC may serve as an alternative therapy to retard the development of diabetic retinopathy.
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Affiliation(s)
- Bo-Jeong Pyun
- Herbal Medicine Division, Korea Institute of Oriental Medicine, 1672 Yuseongdae-ro, Yuseong-gu, Daejeon 34054, Korea; (B.-J.P.); (D.H.J.)
| | - Young Sook Kim
- Research Infrastructure Team, Herbal Medicine Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea;
| | - Ik Soo Lee
- Research Infrastructure Team, Herbal Medicine Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea;
| | - Dong Ho Jung
- Herbal Medicine Division, Korea Institute of Oriental Medicine, 1672 Yuseongdae-ro, Yuseong-gu, Daejeon 34054, Korea; (B.-J.P.); (D.H.J.)
| | - Joo-Hwan Kim
- Department of Life Science, Gachon University, Seongnam, Kyonggi-do 13120, Korea;
| | - Jin Sook Kim
- Herbal Medicine Division, Korea Institute of Oriental Medicine, 1672 Yuseongdae-ro, Yuseong-gu, Daejeon 34054, Korea; (B.-J.P.); (D.H.J.)
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14
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Qi MY, Wang XT, Xu HL, Yang ZL, Cheng Y, Zhou B. Protective effect of ferulic acid on STZ-induced diabetic nephropathy in rats. Food Funct 2020; 11:3706-3718. [DOI: 10.1039/c9fo02398d] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ferulic acid protects against diabetic nephropathy in STZ-induced rats by attenuating oxidative stress, inflammation, fibrosis and podocyte injury.
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Affiliation(s)
- Min-you Qi
- Institution of Pharmacology
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou
- China
| | - Xu-tao Wang
- Institution of Pharmacology
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou
- China
| | - Hui-lin Xu
- Institution of Pharmacology
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou
- China
| | - Zhang-liang Yang
- Institution of Pharmacology
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou
- China
| | - Yin Cheng
- Institution of Pharmacology
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou
- China
| | - Bin Zhou
- Institution of Pharmacology
- College of Pharmaceutical Sciences
- Zhejiang University of Technology
- Hangzhou
- China
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Kim CS, Kim J, Kim YS, Jo K, Lee YM, Jung DH, Lee IS, Kim JH, Kim JS. Improvement in Diabetic Retinopathy through Protection against Retinal Apoptosis in Spontaneously Diabetic Torii Rats Mediated by Ethanol Extract of Osteomeles schwerinae C.K. Schneid. Nutrients 2019; 11:nu11030546. [PMID: 30836664 PMCID: PMC6470872 DOI: 10.3390/nu11030546] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 02/27/2019] [Accepted: 02/27/2019] [Indexed: 12/14/2022] Open
Abstract
Retinal apoptosis plays a critical role in the progression of diabetic retinopathy (DR), a common diabetic complication. Currently, the tight control of blood glucose levels is the standard approach to prevent or delay the progression of DR. However, prevalence of DR among diabetic patients remains high. Focusing on natural nutrients or herbal medicines that can prevent or delay the onset of diabetic complications, we administered an ethanol extract of the aerial portion of Osteomeles schwerinae (OSSCE), a Chinese herbal medicine, over a period of 17 weeks to spontaneously diabetic Torii (SDT) rats. OSSCE was found to ameliorate retinal apoptosis through the regulation of advanced glycation end product (AGE) accumulation, oxidative stress, and mitochondrial function via the inhibition of NF-κB activity, in turn, through the downregulation of PKCδ, P47phox, and ERK1/2. We further demonstrated in 25 mM glucose-treated human retinal microvascular endothelial cells (HRMECs) that hyperoside (3-O-galactoside-quercetin), quercitrin (3-O-rhamnoside-quercetin), and 2″-O-acetylvitexin (8-C-(2″-O-acetyl-glucoside)-apigenin) were the active components of OSSCE that mediated its pharmacological action. Our results provide evidence that OSSCE is a powerful agent that may directly mediate a delay in the development or disease improvement in patients of DR.
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Affiliation(s)
- Chan-Sik Kim
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
- Korean Convergence Medicine, University of Science and Technology (UST), Daejeon 34113, Korea.
| | - Junghyun Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
- Department of Oral Pathology, School of Dentistry, Chonbuk National University, Jeonju 54896, Korea.
| | - Young Sook Kim
- Korean Convergence Medicine, University of Science and Technology (UST), Daejeon 34113, Korea.
- Clinical Research Coordination Team, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Kyuhyung Jo
- Clinical Medicine Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Yun Mi Lee
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Dong Ho Jung
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Ik Soo Lee
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Joo-Hwan Kim
- Department of Life Science. Gachon University, 1342, Seongnamdaero, Seongnam, Gyeonggido 13120, Korea.
| | - Jin Sook Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
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Asgharpour Dil F, Ranjkesh Z, Goodarzi MT. A systematic review of antiglycation medicinal plants. Diabetes Metab Syndr 2019; 13:1225-1229. [PMID: 31336468 DOI: 10.1016/j.dsx.2019.01.053] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 01/25/2019] [Indexed: 01/16/2023]
Abstract
BACKGROUND AND OBJECTIVES The present review shows a list of anti-glycation plants with their anti-glycation activity mechanisms that can attract the attention of pharmacologist for further scientific research towards finding better remedy for diabetic complications. MATERIALS Google scholar, Pubmed, Web of Science and Scopus were searched. The terms were advanced glycation end products (AGEs), medicinal plants, antiglycation products. RESULTS plants that studied in this review inhibit glycation in several possible mechanisms. Some of these plants inhibit the production of shiff base and amadori products. The others inhibit the generation of amadori products in the advanced phase. Some others blocked the aggregation of AGEs and some plants have antioxidant activity and reduce AGEs formation by preventing oxidation of amadori product and metal-catalyzed glucoxidation. CONCLUSION This review can help pharmacologist to find antiglycation natural substance that can be useful in treatment of diabetic complications.
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Affiliation(s)
| | - Zahra Ranjkesh
- Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, Iran
| | - Mohammad Taghi Goodarzi
- Department of Clinical Biochemistry, Medical School, Hamadan University of Medical Sciences, Hamadan, Iran.
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17
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Sui Y, Liu W, Tian W, Li XQ, Cao W. A branched arabinoglucan from Angelica sinensis
ameliorates diabetic renal damage in rats. Phytother Res 2019; 33:818-831. [DOI: 10.1002/ptr.6275] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 10/22/2018] [Accepted: 12/07/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Yi Sui
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, School of Chemistry and Pharmacy; Northwest A&F University; Yangling 712100 China
| | - Wenjuan Liu
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, School of Chemistry and Pharmacy; Northwest A&F University; Yangling 712100 China
- Department of Natural Medicine and Institute of Materia Medica, School of Pharmacy; Fourth Military Medical University; Xi'an 710032 China
| | - Wen Tian
- Department of Pharmacology, School of Pharmacy; Fourth Military Medical University; Xi'an 710032 China
| | - Xiao-Qiang Li
- Department of Pharmacology, School of Pharmacy; Fourth Military Medical University; Xi'an 710032 China
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine; Fourth Military Medical University; Xi'an 710032 China
| | - Wei Cao
- Shaanxi Key Laboratory of Natural Products and Chemical Biology, School of Chemistry and Pharmacy; Northwest A&F University; Yangling 712100 China
- Department of Natural Medicine and Institute of Materia Medica, School of Pharmacy; Fourth Military Medical University; Xi'an 710032 China
- Key Laboratory of Gastrointestinal Pharmacology of Chinese Materia Medica of the State Administration of Traditional Chinese Medicine; Fourth Military Medical University; Xi'an 710032 China
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18
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Cataract Preventive Role of Isolated Phytoconstituents: Findings from a Decade of Research. Nutrients 2018; 10:nu10111580. [PMID: 30373159 PMCID: PMC6265913 DOI: 10.3390/nu10111580] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 10/10/2018] [Accepted: 10/15/2018] [Indexed: 12/19/2022] Open
Abstract
Cataract is an eye disease with clouding of the eye lens leading to disrupted vision, which often develops slowly and causes blurriness of the eyesight. Although the restoration of the vision in people with cataract is conducted through surgery, the costs and risks remain an issue. Botanical drugs have been evaluated for their potential efficacies in reducing cataract formation decades ago and major active phytoconstituents were isolated from the plant extracts. The aim of this review is to find effective phytoconstituents in cataract treatments in vitro, ex vivo, and in vivo. A literature search was synthesized from the databases of Pubmed, Science Direct, Google Scholar, Web of Science, and Scopus using different combinations of keywords. Selection of all manuscripts were based on inclusion and exclusion criteria together with analysis of publication year, plant species, isolated phytoconstituents, and evaluated cataract activities. Scientists have focused their attention not only for anti-cataract activity in vitro, but also in ex vivo and in vivo from the review of active phytoconstituents in medicinal plants. In our present review, we identified 58 active phytoconstituents with strong anti-cataract effects at in vitro and ex vivo with lack of in vivo studies. Considering the benefits of anti-cataract activities require critical evaluation, more in vivo and clinical trials need to be conducted to increase our understanding on the possible mechanisms of action and the therapeutic effects.
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19
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Sha H, Tong X, Zhao J. Abnormal expressions of AGEs, TGF-β1, BDNF and their receptors in diabetic rat colon-Associations with colonic morphometric and biomechanical remodeling. Sci Rep 2018; 8:9437. [PMID: 29930382 PMCID: PMC6013484 DOI: 10.1038/s41598-018-27787-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 06/08/2018] [Indexed: 02/06/2023] Open
Abstract
Present study aims to investigate the role of AGEs, TGF-β1, BDNF and their receptors on diabetes-induced colon remodeling. Diabetes was induced by a single tail vein injection 40 mg/kg of STZ. The parameters of morphometric and biomechanical properties of colonic segments were obtained from diabetic and normal rats. The expressions of AGE, RAGE, TGF- β1, TGF- β1 receptor, BDNF and TrkB were immunohistochemically detected in different layers of the colon. The expressions of AGE, RAGE, TGF-β1 and TGF- β1 receptor were increased whereas BDNF and TrkB were decreased in the diabetic colon (P < 0.05, P < 0.01). AGE, RAGE and TGF-β1 receptor expressions were positively correlated whereas the BDNF expression was negatively correlated with most of the morphometry and biomechanical parameters (P < 0.05, P < 0.01, P < 0.001). AGE, TGF- β1 and BDNF in different layers correlated with their receptors RAGE, TGF- β1 receptor and TrkB respectively. STZ-induced diabetes up-regulated the expression of AGE, RAGE, TGF- β1 and TGF- β1 receptors and down-regulated BDNF and TrkB in different layers of diabetic colon mainly due to hyperglycemia. Such changes maybe important for diabetes-induced colon remodeling, however it is needed to further perform mechanistic experiments in order to study causality or approaches that explain the relevance of the molecular pathways.
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Affiliation(s)
- Hong Sha
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, 100029, China
| | - Xiaolin Tong
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053, China
| | - Jingbo Zhao
- Department of Clinical Medicine, Aarhus University, 8200, Aarhus N, Denmark.
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20
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Schepetkin IA, Ramstead AG, Kirpotina LN, Voyich JM, Jutila MA, Quinn MT. Therapeutic Potential of Polyphenols from Epilobium Angustifolium (Fireweed). Phytother Res 2016; 30:1287-97. [PMID: 27215200 DOI: 10.1002/ptr.5648] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 03/27/2016] [Accepted: 04/29/2016] [Indexed: 01/27/2023]
Abstract
Epilobium angustifolium is a medicinal plant used around the world in traditional medicine for the treatment of many disorders and ailments. Experimental studies have demonstrated that Epilobium extracts possess a broad range of pharmacological and therapeutic effects, including antioxidant, anti-proliferative, anti-inflammatory, antibacterial, and anti-aging properties. Flavonoids and ellagitannins, such as oenothein B, are among the compounds considered to be the primary biologically active components in Epilobium extracts. In this review, we focus on the biological properties and the potential clinical usefulness of oenothein B, flavonoids, and other polyphenols derived from E. angustifolium. Understanding the biochemical properties and therapeutic effects of polyphenols present in E. angustifolium extracts will benefit further development of therapeutic treatments from this plant. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Igor A Schepetkin
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, 59717, USA
| | - Andrew G Ramstead
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, 59717, USA
| | - Liliya N Kirpotina
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, 59717, USA
| | - Jovanka M Voyich
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, 59717, USA
| | - Mark A Jutila
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, 59717, USA
| | - Mark T Quinn
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, 59717, USA
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21
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Sha H, Zhao D, Tong X, Gregersen H, Zhao J. Mechanism Investigation of the Improvement of Chang Run Tong on the Colonic Remodeling in Streptozotocin-Induced Diabetic Rats. J Diabetes Res 2015; 2016:1826281. [PMID: 26839890 PMCID: PMC4709916 DOI: 10.1155/2016/1826281] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 09/29/2015] [Accepted: 09/30/2015] [Indexed: 02/06/2023] Open
Abstract
Previous study demonstrated that Chang Run Tong (CRT) could partly restore the colon remodeling in streptozotocin- (STZ-) induced diabetic rats. Here we investigated the mechanisms of such effects of CRT. Diabetes was induced by a single injection of 40 mg/kg of STZ. CRT was poured into the stomach by gastric lavage once daily for 60 days. The remodeling parameters were obtained from diabetic (DM), CRT treated diabetic (T1, 50 g/kg; T2, 25 g/kg), and normal (Con) rats. Expressions of advanced glycation end product (AGE), AGE receptor, transforming growth factor-β1 (TGF-β1), and TGF-β1 receptor in the colon wall were immunochemically detected and quantitatively analyzed. The association between the expressions of those proteins and the remodeling parameters was analyzed. The expressions of those proteins were significantly higher in different colon layers in the DM group (P < 0.05, P < 0.01) and highly correlated to the remodeling parameters. Furthermore, the expressions of those proteins were significantly decreased in the T1 group (P < 0.05, P < 0.01) but not in the T2 group (P > 0.05). The corrective effect on the expressions of those proteins is likely to be one molecular pathway for the improvement of CRT on the diabetes-induced colon remodeling.
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Affiliation(s)
- Hong Sha
- China-Japan Hospital, Beijing 100029, China
| | - Dong Zhao
- China-Japan Hospital, Beijing 100029, China
| | - Xiaolin Tong
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
| | - Hans Gregersen
- Bioengineering College of Chongqing University, Chongqing 400044, China
| | - Jingbo Zhao
- Bioengineering College of Chongqing University, Chongqing 400044, China
- Department of Clinical Medicine, Aarhus University, 8200 Aarhus N, Denmark
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22
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Mallipattu SK, Uribarri J. Advanced glycation end product accumulation: a new enemy to target in chronic kidney disease? Curr Opin Nephrol Hypertens 2015; 23:547-54. [PMID: 25160075 DOI: 10.1097/mnh.0000000000000062] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE OF REVIEW The critical role of advanced glycation end products (AGEs) in the progression of chronic diseases and their complications has recently become more apparent. This review summarizes the recent contributions to the field of AGEs in chronic kidney disease (CKD). RECENT FINDINGS Over the past 3 decades, AGEs have been implicated in the progression of CKD, and specifically diabetic nephropathy. Although numerous in-vitro and in-vivo studies highlight the detrimental role of AGEs accumulation in tissue injury, few prospective human studies or clinical trials show that inhibiting this process ameliorates disease. Nonetheless, recent studies have focused on the novel mechanisms that contribute to end-organ injury as a result of AGEs accumulation, as well as novel targets of therapy in kidney disease. SUMMARY As the prevalence and the incidence of CKD rises in the United States, it is essential to identify therapeutic strategies that either delay the progression of CKD or improve mortality in this population. The focus of this review is on highlighting the recent studies that advance our current understanding of the mechanisms mediating AGEs-induced CKD progression, as well as novel treatment strategies that have the potential to abrogate this disease process. VIDEO ABSTRACT http://links.lww.com/CONH/A12.
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Affiliation(s)
- Sandeep K Mallipattu
- aDivision of Nephrology, Department of Medicine, Stony Brook University bDivision of Nephrology, Department of Medicine, Mount Sinai School of Medicine, New York, New York, USA
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Litsea japonica Extract Inhibits Aldose Reductase Activity and Hyperglycemia-Induced Lenticular Sorbitol Accumulation in db/db Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:747830. [PMID: 25802544 PMCID: PMC4353661 DOI: 10.1155/2015/747830] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 02/04/2015] [Indexed: 11/30/2022]
Abstract
Aldose reductase (AR) is the first and rate-limiting enzyme of the polyol pathway. AR-dependent synthesis of excess polyols leads to lens opacification in diabetic cataract. The purpose of this study is to investigate the protective effect of Litsea japonica extract (LJE) on diabetes-induced lens opacification and its protective mechanism in db/db mice. Seven-week-old male db/db mice were treated with LJE (100 and 250 mg/kg body weight) once a day orally for 12 weeks. LJE dose dependently inhibited rat lens aldose reductase activity in vitro (IC50 = 13.53 ± 0.74 µg/mL). In db/db mice, lens was slightly opacified, and lens fiber cells were swollen and ruptured. In addition, lenticular sorbitol accumulation was increased in db/db mice. However, the administration of LJE inhibited these lenticular sorbitol accumulation and lens architectural changes in db/db mice. Our results suggest that LJE might be beneficial for the treatment of diabetes-induced lens opacification. The ability of LJE to suppress lenticular sorbitol accumulation may be mediated by the inhibition of AR activity.
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