1
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Wang W, Xin X, Zhang M, Li X, Zhao G, Bai WD. Improving physicochemical characteristics and cytotoxicity of baicalin esters by liposome encapsulation. J Microencapsul 2024; 41:312-325. [PMID: 38717966 DOI: 10.1080/02652048.2024.2348462] [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: 11/07/2023] [Accepted: 04/19/2024] [Indexed: 05/18/2024]
Abstract
The instability of ester bonds, low water solubility, and increased cytotoxicity of flavonoid glycoside esters significantly limit their application in the food industry. Therefore, the present study attempted to resolve these issues through liposome encapsulation. The results showed that baicalin butyl ester (BEC4) and octyl ester (BEC8) have higher encapsulation and loading efficiencies and lower leakage rate from liposomes than baicalin. FTIR results revealed the location of BEC4 and BEC8 in the hydrophobic layer of liposomes, which was different from baicalin. Additionally, liposome encapsulation improved the water solubility and stability of BEC4 and BEC8 in the digestive system and PBS but significantly reduced their cytotoxicity. Furthermore, the release rate of BEC4 and BEC8 from liposomes was lower than that of baicalin during gastrointestinal digestion. These results indicate that liposome encapsulation alleviated the negative effects of fatty chain introduction into flavonoid glycosides.
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Affiliation(s)
- Wei Wang
- College of Light Industry and Food Technology, Guangdong Key Laboratory of Science and Technology of Lingnan Special Food, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, China
| | - Xuan Xin
- College of Light Industry and Food Technology, Guangdong Key Laboratory of Science and Technology of Lingnan Special Food, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, China
| | - Mengmeng Zhang
- College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, China
| | - Xiaofeng Li
- College of Food Science and Engineering, South China University of Technology, Guangzhou, Guangdong, China
| | - Guanglei Zhao
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong, China
| | - Wei Dong Bai
- College of Light Industry and Food Technology, Guangdong Key Laboratory of Science and Technology of Lingnan Special Food, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, China
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2
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Li J, Zhang K, Xu M, Cui H, Guo Y, Yao D, Chen W, Liang H, Wang H, Wang J. Baicalin - 2- ethoxyethyl ester alleviates renal fibrosis by inhibiting PI3K/AKT/NF-κB signaling pathway. Toxicol Appl Pharmacol 2024; 483:116827. [PMID: 38246290 DOI: 10.1016/j.taap.2024.116827] [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: 10/24/2023] [Revised: 01/07/2024] [Accepted: 01/16/2024] [Indexed: 01/23/2024]
Abstract
With the increasing incidence of chronic kidney disease (CKD), the development of safe and effective anti-renal fibrosis drugs is particularly urgent. Recently, Baicalin has been considered to have a renal protective effect, but its bioavailability is too low. Therefore, we synthesized baicalin-2-ethoxyethyl ester (BAE) by esterification of baicalin. We hope that this experiment will demonstrate the anti-renal fibrosis effect of BAE and explain its molecular mechanism. In this study, the chronic kidney injury model of SD rats was established by 5/6 nephrectomy, and BAE was given for 28 days. The results showed that after BAE treatment, the serum creatinine and urea nitrogen levels decreased significantly, and the pathological changes in kidneys were improved. In addition, RNA-seq analysis showed that the mechanism of BAE in relieving renal fibrosis was related to the ECM receptor, PI3K/AKT signaling pathway, and inflammatory reaction. The western blotting analysis confirmed that BAE could inhibit the expression of α-SMA, TGF-β1, p-PI3K, p-AKT, p-IκBα, and NF-κB p65. We found that BAE can inhibit the inflammatory reaction and promote the degradation of the extracellular matrix by inhibiting the activation of the PI3K/AKT/NF-κB pathway, thus alleviating the symptoms of renal fibrosis in 5/6Nx rats, which revealed BAE was a potential compound to relieve renal fibrosis effect.
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Affiliation(s)
- Jiacun Li
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education, College of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Ke Zhang
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education, College of Pharmacy, Shihezi University, Shihezi 832002, China.
| | - Mei Xu
- First Affiliated Hospital of the Medical College, Shihezi University, XinJiang 832008, PR China
| | - Huanyue Cui
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education, College of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Yaping Guo
- School of Pharmaceutical Sciences, Shenzhen Technology University, Shenzhen 518060, China
| | - Dahong Yao
- School of Pharmaceutical Sciences, Shenzhen Technology University, Shenzhen 518060, China.
| | - Wenhua Chen
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education, College of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Huaimin Liang
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education, College of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Hangyu Wang
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education, College of Pharmacy, Shihezi University, Shihezi 832002, China
| | - Jinhui Wang
- Key Laboratory of Xinjiang Phytomedicine Resource and Utilization, Ministry of Education, College of Pharmacy, Shihezi University, Shihezi 832002, China; Department of Medicinal Chemistry and Natural Medicine Chemistry (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), Harbin Medical University, Harbin 150081, China; Shenzhen Honghui Biopharmaceutical Co., Ltd., Shenzhen 518000, China.
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3
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Jeong GH, Lee H, Lee HK, Choi HJ, Chung BY, Bai HW. Inhibitory effect of γ-ray-modified hydroxymethylated baicalins on NO production. Bioorg Med Chem Lett 2023; 96:129491. [PMID: 37778427 DOI: 10.1016/j.bmcl.2023.129491] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/17/2023] [Accepted: 09/28/2023] [Indexed: 10/03/2023]
Abstract
Baicalin, a glucuronic flavone, is the major active component in the medicinal plant Scutellaria baicalensis. Herein, baicalin was irradiated by γ-rays to afford four unusual flavanones, baicalinols A (2), B (3), and C (4) and peroxybaicaleinol (5), and two known flavones, oroxylin A (6) and baicalein (7). The structures of the hydroxymethylated products were elucidated using nuclear magnetic resonance spectroscopy and mass spectrometry, and their absolute configuration was established using electronic circular dichroism spectroscopy. Novel hydroxymethylated flavanones 2 and 3 suppressed both nitric oxide (NO) production and the expression of inducible NO synthase and showed significantly higher anti-inflammatory activities in lipopolysaccharide-stimulated macrophages than the parent compound. These newly generated hydroxymethylated flavanones can be potentially used for treating inflammatory diseases.
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Affiliation(s)
- Gyeong Han Jeong
- Research Division for Biotechnology, Advanced Radiation Technology Institute (ARTI), Korea Atomic Energy Research Institute (KAERI), Jeongeup 56212, Republic of Korea; Center for Companion Animal New Drug Development, Korea Institute of Toxicology (KIT), Jeongeup 56212, Republic of Korea
| | - Hanui Lee
- Research Division for Biotechnology, Advanced Radiation Technology Institute (ARTI), Korea Atomic Energy Research Institute (KAERI), Jeongeup 56212, Republic of Korea; Center for Companion Animal New Drug Development, Korea Institute of Toxicology (KIT), Jeongeup 56212, Republic of Korea
| | - Hong-Ki Lee
- Center for Companion Animal New Drug Development, Korea Institute of Toxicology (KIT), Jeongeup 56212, Republic of Korea
| | - Hyo Jin Choi
- Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (K-MEDI Hub), 80 Cheombok‑Ro, Dong‑Gu, Daegu 41061, Republic of Korea
| | - Byung Yeoup Chung
- Research Division for Biotechnology, Advanced Radiation Technology Institute (ARTI), Korea Atomic Energy Research Institute (KAERI), Jeongeup 56212, Republic of Korea.
| | - Hyoung-Woo Bai
- Research Division for Biotechnology, Advanced Radiation Technology Institute (ARTI), Korea Atomic Energy Research Institute (KAERI), Jeongeup 56212, Republic of Korea; Center for Companion Animal New Drug Development, Korea Institute of Toxicology (KIT), Jeongeup 56212, Republic of Korea; Radiation Biotechnology and Applied Radioisotope Science, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
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4
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Zhao Z, Nian M, Qiao H, Yang X, Wu S, Zheng X. Review of bioactivity and structure-activity relationship on baicalein (5,6,7-trihydroxyflavone) and scutellarin (5,7-dihydroxy-8-methoxyflavone) derivatives: Structural modifications inspired from flavonoids in Scutellaria baicalensis. Eur J Med Chem 2022; 243:114733. [DOI: 10.1016/j.ejmech.2022.114733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/15/2022] [Accepted: 08/28/2022] [Indexed: 12/13/2022]
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5
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Wisetsai A, Choodej S, Ngamrojanavanich N, Pudhom K. Fatty acid acylated flavonol glycosides from the seeds of Nephelium lappaceum and their nitric oxide suppression activity. PHYTOCHEMISTRY 2022; 201:113262. [PMID: 35660550 DOI: 10.1016/j.phytochem.2022.113262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 05/26/2022] [Accepted: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Five undescribed fatty acid esters of flavonol glycosides, nephelosides A-E, along with eight known compounds, were isolated from the seeds of Nephelium lappaceum L. The structures were elucidated by extensive analysis of spectroscopic data in combination with GC-MS analysis. Potency of compounds toward nitric oxide suppression was assessed by monitoring the inhibition of lipopolysaccharide-stimulated nitric oxide production in J744.A1 macrophage cells. Nepheloside D, kaempferol and kaempferol 7-O-α-L-rhamnopyranoside showed significant activity with IC50 values of 26.5, 11.6 and 12.0 μM, respectively.
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Affiliation(s)
- Awat Wisetsai
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Siwattra Choodej
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | | | - Khanitha Pudhom
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
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6
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Li C, Dai T, Chen J, Chen M, Liang R, Liu C, Du L, McClements DJ. Modification of flavonoids: methods and influences on biological activities. Crit Rev Food Sci Nutr 2022; 63:10637-10658. [PMID: 35687361 DOI: 10.1080/10408398.2022.2083572] [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] [Indexed: 11/03/2022]
Abstract
Flavonoids are important active ingredients in plant-based food, which have many beneficial effects on health. But the low solubility, poor oral bioavailability, and inferior stability of many flavonoids may limit their applications in the food, cosmetics, and pharmaceutical industries. Structural modification can overcome these shortcomings to improve and extend the application of flavonoids. The study of how to modify flavonoids and the influence of various modifications on biological activity have drawn great interest in the current literature. In this review, the working principles and operating conditions of modification methods were summarized along with their potential and limitations in terms of operational safety, cost, and productivity. The influence of various modifications on biological activities and the structure-activity relationships of flavonoids derivatives were discussed and highlighted, which may give guidance for the synthesis of highly effective active agents. In addition, the safety of flavonoids derivatives is reviewed, and future research directions of flavonoid modification research are discussed.
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Affiliation(s)
- Changhong Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Taotao Dai
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Guangxi Academy of Agricultural Sciences, Agro-food Science and Technology Research Institute, Nanning, China
| | - Jun Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Mingshun Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Ruihong Liang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Chengmei Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
| | - Liqing Du
- China Academy of Tropical Agricultural Sciences, South Subtropical Crop Research Institute, Zhanjiang China
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7
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Pinna C, Martino PA, Meroni G, Sora VM, Tamborini L, Dallavalle S, Contente ML, Pinto A. Biocatalyzed Synthesis of Vanillamides and Evaluation of Their Antimicrobial Activity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:223-228. [PMID: 34965127 DOI: 10.1021/acs.jafc.1c06213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A series of vanillamides were easily synthesized, exploiting an acyltransferase from Mycobacterium smegmatis (MsAcT). After their evaluation as antimicrobial agents against a panel of Gram-positive and Gram-negative bacteria, three compounds were demonstrated to be 9-fold more effective toward Pseudomonas aeruginosa than the vanillic acid precursor. Taking into consideration the scarce permeability of the Gram-negative bacteria cell envelope when compared to Gram-positive strains or yeasts, these molecules can be considered the basis for the generation of new nature-inspired antimicrobials. To increase the process productivity and avoid any problem related to the poor water solubility of the starting material, a tailored flow biocatalyzed strategy in pure toluene was set up. While a robust immobilization protocol exploiting glyoxyl-agarose was employed to increase the stability of MsAcT, in-line work-up procedures were added downstream the process to enhance the system automation and reduce the overall costs.
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Affiliation(s)
- Cecilia Pinna
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133 Milan, Italy
| | - Piera Anna Martino
- Department of Biomedical, Surgical and Dental Sciences (DSBCO), One Health Unit, University of Milan, via Pascal 36, 20133 Milan, Italy
| | - Gabriele Meroni
- Department of Biomedical, Surgical and Dental Sciences (DSBCO), One Health Unit, University of Milan, via Pascal 36, 20133 Milan, Italy
| | - Valerio Massimo Sora
- Department of Biomedical, Surgical and Dental Sciences (DSBCO), One Health Unit, University of Milan, via Pascal 36, 20133 Milan, Italy
| | - Lucia Tamborini
- Department of Pharmaceutical Sciences (DISFARM), University of Milan, via Mangiagalli 25, 20133 Milan, Italy
| | - Sabrina Dallavalle
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133 Milan, Italy
| | - Martina L Contente
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133 Milan, Italy
| | - Andrea Pinto
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, via Celoria 2, 20133 Milan, Italy
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8
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Mahmoud AM, Sayed AM, Ahmed OS, Abdel-Daim MM, Hassanein EHM. The role of flavonoids in inhibiting IL-6 and inflammatory arthritis. Curr Top Med Chem 2022; 22:746-768. [PMID: 34994311 DOI: 10.2174/1568026622666220107105233] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/21/2021] [Accepted: 10/28/2021] [Indexed: 11/22/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disease that primarily affects the synovial joints. RA has well-known clinical manifestations and can cause progressive disability and premature death along with socioeconomic burdens. Interleukin-6 (IL-6) has been implicated in the pathology of RA where it can stimulate pannus formation, osteoclastogenesis, and oxidative stress. Flavonoids are plant metabolites with beneficial pharmacological effects, including anti-inflammatory, antioxidant, antidiabetic, anticancer, and others. Flavonoids are polyphenolic compounds found in a variety of plants, vegetables, and fruits. Many flavonoids have demonstrated anti-arthritic activity mediated mainly through the suppression of pro-inflammatory cytokines. This review thoroughly discusses the accumulate data on the role of flavonoids on IL-6 in RA.
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Affiliation(s)
- Ayman M Mahmoud
- Physiology Division, Zoology Department, Faculty of Science, Beni-Suef University, Egypt
| | - Ahmed M Sayed
- Biochemistry Laboratory, Chemistry Department, Faculty of Science, Assiut University, Egypt
| | - Osama S Ahmed
- Faculty of Pharmacy, Al-Azhar University-Assiut Branch, Egypt
| | - Mohamed M Abdel-Daim
- Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Egypt
| | - Emad H M Hassanein
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Al-Azhar University-Assiut Branch, Egypt
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9
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In vitro absorption and lipid-lowering activity of baicalin esters synthesized by whole-cell catalyzed esterification. Bioorg Chem 2022; 120:105628. [DOI: 10.1016/j.bioorg.2022.105628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/12/2022] [Accepted: 01/13/2022] [Indexed: 11/21/2022]
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10
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Li J, Ni G, Liu Y, Wang R, Yu D. Long-chain fatty acid acylated derivatives of isoflavone glycosides from the rhizomes of Iris domestica. PHYTOCHEMISTRY 2022; 193:112977. [PMID: 34715401 DOI: 10.1016/j.phytochem.2021.112977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/19/2021] [Accepted: 10/03/2021] [Indexed: 06/13/2023]
Abstract
Six undescribed long-chain fatty acid esters of isoflavone glycosides were obtained from the rhizomes of Iris domestica (L.). Their structures were elucidated by comprehensive spectroscopic data, alkaline hydrolysis, and acid hydrolysis. This is the first report of the long-chain (C14-C18) fatty acid derivatives of isoflavone glycosides from natural products. Belamcandnoate B and D exhibited moderate cytotoxic activities against HCT-116, HepG2, and BGC823 cell lines with IC50 values of 1.69-6.86 μM. Belamcandnoate B and E exhibited 72.27 and 58.98% inhibitory activities, respectively, against Fe2+/cysteine-induced liver microsomal lipid peroxidation at a concentration of 10 μM.
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Affiliation(s)
- Jiayuan Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100050, People's Republic of China
| | - Gang Ni
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100050, People's Republic of China
| | - Yanfei Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100050, People's Republic of China
| | - Renzhong Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100050, People's Republic of China
| | - Dequan Yu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100050, People's Republic of China.
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11
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Wang Z, Li Y, Li M, Zhang X, Ji Q, Zhao X, Bi Y, Luo S. Immobilized Fe 3O 4-Polydopamine- Thermomyces lanuginosus Lipase-Catalyzed Acylation of Flavonoid Glycosides and Their Analogs: An Improved Insight Into Enzymic Substrate Recognition. Front Bioeng Biotechnol 2021; 9:798594. [PMID: 34869302 PMCID: PMC8636704 DOI: 10.3389/fbioe.2021.798594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 10/28/2021] [Indexed: 11/13/2022] Open
Abstract
The conversion of flavonoid glycosides and their analogs to their lipophilic ester derivatives was developed by nanobiocatalysts from immobilizing Thermomyces lanuginosus lipase (TLL) on polydopamine-functionalized magnetic Fe3O4 nanoparticles (Fe3O4-PDA-TLL). The behavior investigation revealed that Fe3O4-PDA-TLL exhibits a preference for long chain length fatty acids (i.e., C10 to C14) with higher reaction rates of 12.6-13.9 mM/h. Regarding the substrate specificity, Fe3O4-PDA-TLL showed good substrate spectrum and favorably functionalized the primary OH groups, suggesting that the steric hindrances impeded the secondary or phenolic hydroxyl groups of substrates into the bonding site of the active region of TLL to afford the product.
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Affiliation(s)
| | | | | | | | | | | | - Yanhong Bi
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huai’an, China
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12
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Abstract
Fatty acids and polyphenols represent different classes of pharmacologically active molecules. Hybrid derivatives of these compounds are interesting therapeutic tools. They could be obtained using enzymatic approaches, which allow regioselective derivatizations. In this short note, the pancreatic porcine lipase was employed to mediate the regioselective synthesis of 7-docosahexaenoyl-quercetin was described. The C-7 regioisomer formation was confirmed by 1H-NMR experiment. Generally, in this approach the alcoholic OH- was preferred when present. Nevertheless, in this case, it was demonstrated that the hindrance of the acyl group is a variable to obtain a good regioselectivity in C-7 position, employing only one-step reaction.
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13
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Sithisarn P, Rojsanga P, Sithisarn P. Flavone-Rich Fractions and Extracts from Oroxylum indicum and Their Antibacterial Activities against Clinically Isolated Zoonotic Bacteria and Free Radical Scavenging Effects. Molecules 2021; 26:1773. [PMID: 33809943 PMCID: PMC8004265 DOI: 10.3390/molecules26061773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 03/15/2021] [Accepted: 03/19/2021] [Indexed: 12/01/2022] Open
Abstract
Oroxylum indicum extracts from the seeds collected from Lampang and Pattani provinces in Thailand, and young fruits and flowers exhibited in vitro display antioxidant and antibacterial activities against clinically isolated zoonotic bacteria including Staphylococcus intermedius, Streptococcus suis, Pseudomonas aeruginosa, β-hemolytic Escherichia coli and Staphylococcus aureus. The orange crystals and yellow precipitates were obtained from the preparation processes of the seed extracts. The orange-red crystals from the seeds collected from Lampang province exhibited strong in vitro 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging effects (EC50 value = 25.99 ± 3.30 μg/mL) and antibacterial effects on S. intermedius and β-hemolytic E. coli while the yellow precipitate from the same source exhibited only antioxidant activity. Quantitative analysis of phytochemicals in O. indicum samples by spectrophotometric and HPLC techniques showed that they contained different amounts of total phenolic, total flavonoid and three major flavones; baicalin, baicalein and chrysin contents. Young fruit extract, which contained low amounts of flavone contents, still promoted antibacterial effects against the tested bacteria with IC50 values lower than 1 mg/mL and MIC values between 4 to 10 mg/mL in S. intermedius, S. aureus and S suis while higher IC50 and MIC values against P. aeruginosa and β-hemolytic E. coli were found. From scanning electron microscopy, the extract of the young fruit of O. indicum promoted morphological changes in the bacterial cells by disrupting the bacterial cell walls, inducing leakage of the cellular content, and generating the abnormal accumulation of cells. The mechanism of action of the extract for this antibacterial effect may be the disruption of the cell membrane and abnormal cell aggregations. Regression analysis of the results suggests the correlation between total phenolic and total flavonoid contents and antioxidant and antibacterial effects. Baicalin was found to have a high correlation with an inhibitory effect against β-hemolytic E. coli while three unidentified peaks, which could be flavones, showed high correlations with an inhibitory effect against S. intermedius, S. suis, P. aeruginosa and S. aureus.
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Affiliation(s)
- Patchima Sithisarn
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Kasetsart University, Bangkok 10900, Thailand;
| | - Piyanuch Rojsanga
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand;
| | - Pongtip Sithisarn
- Department of Pharmacognosy, Faculty of Pharmacy, Mahidol University, Bangkok 10400, Thailand
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14
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Vazhappilly CG, Amararathna M, Cyril AC, Linger R, Matar R, Merheb M, Ramadan WS, Radhakrishnan R, Rupasinghe HPV. Current methodologies to refine bioavailability, delivery, and therapeutic efficacy of plant flavonoids in cancer treatment. J Nutr Biochem 2021; 94:108623. [PMID: 33705948 DOI: 10.1016/j.jnutbio.2021.108623] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/21/2021] [Accepted: 02/28/2021] [Indexed: 02/06/2023]
Abstract
Over the last two decades, several advancements have been made to improve the therapeutic efficacy of plant flavonoids, especially in cancer treatment. Factors such as low bioavailability, poor flavonoid stability and solubility, ineffective targeted delivery, and chemo-resistance hinder the application of flavonoids in anti-cancer therapy. Many anti-cancer compounds failed in the clinical trials because of unexpected altered clearance of flavonoids, poor absorption after administration, low efficacy, and/or adverse effects. Hence, the current research strategies are focused on improving the therapeutic efficacy of plant flavonoids, especially by enhancing their bioavailability through combination therapy, engineering gut microbiota, regulating flavonoids interaction with adenosine triphosphate binding cassette efflux transporters, and efficient delivery using nanocrystal and encapsulation technologies. This review aims to discuss different methodologies with examples from reported dietary flavonoids that showed an enhanced anti-cancer efficacy in both in vitro and in vivo models. Further, the review discusses the recent progress in biochemical modifications of flavonoids to improve bioavailability, solubility, and therapeutic efficacy.
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Affiliation(s)
| | - Madumani Amararathna
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada
| | - Asha Caroline Cyril
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE
| | - Rebecca Linger
- Department of Pharmaceutical and Administrative Sciences, University of Charleston, Charleston, West Virginia, USA
| | - Rachel Matar
- Department of Biotechnology, American University of Ras Al Khaimah, Ras Al Khaimah, UAE
| | - Maxime Merheb
- Department of Biotechnology, American University of Ras Al Khaimah, Ras Al Khaimah, UAE
| | - Wafaa S Ramadan
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah, UAE; College of Medicine, University of Sharjah, Sharjah, UAE
| | - Rajan Radhakrishnan
- College of Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, UAE
| | - H P Vasantha Rupasinghe
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, Nova Scotia, Canada; Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
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Selective synthesis of functionalized quinazolinone derivatives via biocatalysis. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111261] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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