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Tauchen J, Frankova A, Manourova A, Valterova I, Lojka B, Leuner O. Garcinia kola: a critical review on chemistry and pharmacology of an important West African medicinal plant. PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2023:1-47. [PMID: 37359709 PMCID: PMC10205037 DOI: 10.1007/s11101-023-09869-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 04/03/2023] [Indexed: 06/28/2023]
Abstract
Garcinia kola Heckel (Clusiaceae) is a tree indigenous to West and Central Africa. All plant parts, but especially the seeds, are of value in local folklore medicine. Garcinia kola is used in treatment of numerous diseases, including gastric disorders, bronchial diseases, fever, malaria and is used to induce a stimulating and aphrodisiac effect. The plant is now attracting considerable interest as a possible source of pharmaceutically important drugs. Several different classes of compounds such as biflavonoids, benzophenones, benzofurans, benzopyran, vitamin E derivatives, xanthones, and phytosterols, have been isolated from G. kola, of which many appears to be found only in this species, such as garcinianin (found in seeds and roots), kolanone (fruit pulp, seeds, roots), gakolanone (stem bark), garcinoic acid, garcinal (both in seeds), garcifuran A and B, and garcipyran (all in roots). They showed a wide range of pharmacological activities (e.g. analgesic, anticancer, antidiabetic, anti-inflammatory, antimalarial, antimicrobial, hepatoprotective and neuroprotective effects), though this has only been confirmed in animal models. Kolaviron is the most studied compound and is perceived by many studies as the active principle of G. kola. However, its research is associated with significant flaws (e.g. too high doses tested, inappropriate positive control). Garcinol has been tested under better conditions and is perhaps showing more promising results and should attract deeper research interest (especially in the area of anticancer, antimicrobial, and neuroprotective activity). Human clinical trials and mechanism-of-action studies must be carried out to verify whether any of the compounds present in G. kola may be used as a lead in the drug development.
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Affiliation(s)
- Jan Tauchen
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czech Republic
| | - Adela Frankova
- Department of Food Science, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czech Republic
| | - Anna Manourova
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences, Prague, Czech Republic
| | - Irena Valterova
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences, Prague, Czech Republic
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Bohdan Lojka
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences, Prague, Czech Republic
| | - Olga Leuner
- Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences, Prague, Czech Republic
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Li H, Yang J, Wang M, Ma X, Peng X. Studies on the inhibition of α-glucosidase by biflavonoids and their interaction mechanisms. Food Chem 2023; 420:136113. [PMID: 37054519 DOI: 10.1016/j.foodchem.2023.136113] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/15/2023]
Abstract
Biflavonoids are a kind of polyphenol compounds with numerous biological functions. However, the potential inhibitory activities of biflavonoids on α-glucosidase are yet unknown. Here, the inhibitory effects of two biflavonoids (amentoflavone and hinokiflavone) on α-glucosidase and their interaction mechanisms were explored using multispectral approaches and molecular docking. The results showed that the inhibitory activities of biflavonoids were much better compared with monoflavonoid (apigenin) and acarbose, and the order of inhibition ability was hinokiflavone > amentoflavone > apigenin > acarbose. These flavonoids were noncompetitive inhibitors of α-glucosidase and showed synergistic inhibition effects with acarbose. Additionally, they could statically quench the intrinsic fluorescence of α-glucosidase, and form the non-covalent complexes with enzyme primarily through hydrogen bonds and van der Waals forces. The binding of flavonoids changed the conformational structure of α-glucosidase, therefore impairing the enzyme activity. The findings suggested that biflavonoids could be considered as potential hypoglycemic functional foods in diabetes therapy.
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Affiliation(s)
- Huan Li
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China
| | - Jichen Yang
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China
| | - Mengfan Wang
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China.
| | - Xiangzhao Ma
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China
| | - Xin Peng
- School of Life Sciences, Tianjin University, Tianjin 300072, PR China; Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou, Hainan 571158, PR China; State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, PR China.
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Recent Updates on Development of Protein-Tyrosine Phosphatase 1B Inhibitors for Treatment of Diabetes, Obesity and Related Disorders. Bioorg Chem 2022; 121:105626. [DOI: 10.1016/j.bioorg.2022.105626] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 12/19/2021] [Accepted: 01/13/2022] [Indexed: 01/30/2023]
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Xiong X, Tang N, Lai X, Zhang J, Wen W, Li X, Li A, Wu Y, Liu Z. Insights Into Amentoflavone: A Natural Multifunctional Biflavonoid. Front Pharmacol 2022; 12:768708. [PMID: 35002708 PMCID: PMC8727548 DOI: 10.3389/fphar.2021.768708] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 12/02/2021] [Indexed: 12/12/2022] Open
Abstract
Amentoflavone is an active phenolic compound isolated from Selaginella tamariscina over 40 years. Amentoflavone has been extensively recorded as a molecule which displays multifunctional biological activities. Especially, amentoflavone involves in anti-cancer activity by mediating various signaling pathways such as extracellular signal-regulated kinase (ERK), nuclear factor kappa-B (NF-κB) and phosphoinositide 3-kinase/protein kinase B (PI3K/Akt), and emerges anti-SARS-CoV-2 effect via binding towards the main protease (Mpro/3CLpro), spike protein receptor binding domain (RBD) and RNA-dependent RNA polymerase (RdRp) of SARS-CoV-2. Therefore, amentoflavone is considered to be a promising therapeutic agent for clinical research. Considering the multifunction of amentoflavone, the current review comprehensively discuss the chemistry, the progress in its diverse biological activities, including anti-inflammatory, anti-oxidation, anti-microorganism, metabolism regulation, neuroprotection, radioprotection, musculoskeletal protection and antidepressant, specially the fascinating role against various types of cancers. In addition, the bioavailability and drug delivery of amentoflavone, the molecular mechanisms underlying the activities of amentoflavone, the molecular docking simulation of amentoflavone through in silico approach and anti-SARS-CoV-2 effect of amentoflavone are discussed.
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Affiliation(s)
- Xifeng Xiong
- Guangzhou Institute of Traumatic Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Nan Tang
- Department of Traditional Chinese Medicine, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Xudong Lai
- Department of Infectious Disease, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Jinli Zhang
- Guangzhou Institute of Traumatic Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Weilun Wen
- Department of Traditional Chinese Medicine, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Xiaojian Li
- Department of Burn and Plastic Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Aiguo Li
- Guangzhou Institute of Traumatic Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Yanhua Wu
- Department of Traditional Chinese Medicine, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
| | - Zhihe Liu
- Guangzhou Institute of Traumatic Surgery, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, China
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Li CY, Wang HN, He RJ, Huang J, Song LL, Song Y, Huo P, Hou J, Ji G, Ge GB. Discovery and characterization of amentoflavone as a naturally occurring inhibitor against the bile salt hydrolase produced by Lactobacillus salivarius. Food Funct 2022; 13:3318-3328. [DOI: 10.1039/d1fo03277a] [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
Bile salt hydrolases (BSHs), a group of cysteine-hydrolases produced by the gut microbes, which play a crucial role in hydrolysis of the glycine- or taurine-conjugated bile acids, have been validated...
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Bailly C. The traditional and modern uses of Selaginella tamariscina (P.Beauv.) Spring, in medicine and cosmetic: Applications and bioactive ingredients. JOURNAL OF ETHNOPHARMACOLOGY 2021; 280:114444. [PMID: 34302944 DOI: 10.1016/j.jep.2021.114444] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 07/08/2021] [Accepted: 07/20/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Extracts of the plant Selaginella tamariscina (P.Beauv.) Spring (spike moss) are used for a long time in Asia, for the treatment of multiple diseases and conditions. Aqueous and alcoholic leave extracts are used by local communities. In China, the plant (Juan bai) is listed on the Pharmacopoeia. In South Korea, the use of this plant (Kwon Baek) is mentioned in the book Dongui-Bogam (Heo Jun 1613), at the origin of the Hyungsang medicine. S. tamariscina is traditionally used in Vietnam (mong lung rong), Thailand (dok hin), Philippines (pakong-tulog) and other Asian countries. AIM OF THE STUDY To provide an analysis of the multiple traditional and current uses of S. tamariscina extracts (STE) in the field of medicine and cosmetic. The review is also intended at identifying the main natural products at the origin of the many pharmacological properties reported with these extracts (anti-inflammatory, antioxidant, antidiabetic, antibacterial, antiallergic, anticancer effects). METHODS Extensive database retrieval, such as SciFinder and PubMed, was performed by using keywords like " Selaginella tamariscina", "spike moss", "Selaginellaceae ". Relevant textbooks, patents, reviews, and digital documents were consulted to collate all available scientific literature and to provide a complete science-based survey of the topic. RESULTS Different solvents and methods are used to prepare STE. The process can largely modify the natural product content and properties of the extracts. STE display a range of pharmacological effects, useful to treat metabolic disorders, several inflammatory diseases and various cancers. A specific carbonized extract (S. tamariscina carbonisatus) has shown hemostatic effects, whereas standard STE can promote blood circulation. Many patented STE-containing cosmetic preparations are reviewed here. Several biflavonoids (chiefly amentoflavone) and phenolic compounds (selaginellin derivatives) are primarily responsible for the observed pharmacological properties. Potent inhibitors of protein tyrosine phosphatase 1 B (PTP1B), phosphodiesterase-4 (PDE4), and repressor of pro-inflammatory cytokines expression have been identified from STE. CONCLUSION The traditional use of STE supports the research performed with this plant. There are robust experimental data, based on in vitro and in vivo models, documenting the use of STE to treat type 2 diabetes, several inflammatory diseases, and some cancers (in combination with standard chemotherapy). Selaginella tamariscina (P.Beauv.) is a prime reservoir for amentoflavone, and many other bioactive natural products. The interest of the plant in medicine and cosmetic is amply justified.
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Monribot-Villanueva JL, Rodríguez-Fuentes JS, Landa-Cansigno C, Infante-Rodríguez DA, Díaz-Abad JP, Guerrero-Analco JA. Comprehensive profiling and identification of bioactive components from methanolic leaves extract of Juniperus deppeana and its in vitro antidiabetic activity. CAN J CHEM 2020. [DOI: 10.1139/cjc-2020-0177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Juniperus plant species are rich sources of bioactive secondary metabolites and are traditionally used for the treatment of several illnesses, including those related to hyperglycemia and diabetes. The major bioactive compounds identified in certain species of this genus are terpenes and phenolics. Juniperus deppeana Steud. is mainly used as a wood resource and its chemical composition has been partially established. Our goal was to perform a comprehensive profiling of a methanolic extract of leaves of J. deppeana and determine its potential as a source of α-amylase and α-glucosidase inhibitors. Terpene and phenolic compounds were putatively identified based on their accurate mass spectrometric data. Regarding terpenes, we found mainly diterpenes, specifically dehydroabietic acid-like, hinokiol-like, agathic acid-like, and dihydroxyabietatrienoic acid-like compounds. Isopimaric acid was also identified and its identity was confirmed by coelution with an authentic standard via comparing retention time, mass spectrum, and collisional cross section values. For phenolic compounds, we identified mainly compounds with a chemical structure similar to the biflavonoids amentoflavone and bilobetin. Besides, the methanolic extract of J. deppeana leaves show inhibition of α-amylase (IC50 = 85.11 ± 11.91 μg mL−1) and α-glucosidase (IC50 = 32.50 ± 3.40 μg mL−1) enzymes, demonstrating a potential alternative for the search of antidiabetic natural products.
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Affiliation(s)
- Juan L. Monribot-Villanueva
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
| | - Jonathan S. Rodríguez-Fuentes
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
| | - Cristina Landa-Cansigno
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
| | - Dennis A. Infante-Rodríguez
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
| | - Juan P. Díaz-Abad
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
| | - José A. Guerrero-Analco
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
- Laboratorio de Química de Productos Naturales, Red de Estudios Moleculares Avanzados, Clúster Científico y Tecnológico BioMimic®, Instituto de Ecología A.C., Carretera Antigua a Coatepec 351, El Haya, Xalapa, Veracruz, 91073, Mexico
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Gök HN, Deliorman Orhan D, Gürbüz İ, Aslan M. Activity-guided isolation of α-amylase, α-glucosidase, and pancreatic lipase inhibitory compounds from Rhus coriaria L. J Food Sci 2020; 85:3220-3228. [PMID: 32895959 DOI: 10.1111/1750-3841.15438] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 08/05/2020] [Accepted: 08/10/2020] [Indexed: 01/29/2023]
Abstract
The leaves and fruits of Rhus coriaria are traditionally used in Turkey for the treatment of diabetes. The aim of the present study is to determine α-amylase, α-glucosidase, and pancreatic lipase inhibitory activities of R. coriaria leaf and fruit ethanol extracts (80%), and to isolate active compounds against these enzymes. As a result of the activity-guided isolation, the active compounds were determined as the amentoflavone, agathisflavone, and 1,2,3,4,6-penta-O-galloyl-β-glucopyranose. Agathisflavone, amentoflavone, and penta-O-galloyl-β-glucopyranose inhibited α-glucosidase with 11.4 ± 0.9, 11.3 ± 0.7, and 4.1 ± 0.1 µM IC50 values, respectively. Furthermore, penta-O-galloyl-β-glucopyranose inhibited α-amylase with 6.32 ± 0.18 µM IC50 . These three compounds also significantly inhibited (P < 0.05) pancreatic lipase. The results of high-performance liquid chromatography analysis showed that penta-O-galloyl-β-D-glycopyranose was one of the main compounds in both fruit and leaf extracts. Therefore, it may be considered that R. coriaria fruit and leaf extracts can be standardized on this substance and used in the development of both medicinal products and functional food for diabetes. PRACTICAL APPLICATION: Rhus coriaria (Sumac) is one of the plants that is well known and used around the world as a spice. It is also used against diabetes traditionally. The determination of effective compounds can lead to the standardization and development of both medicinal products and functional foods for diabetes. While the fruits of the plant are used as a spice all around the world, the leaves are generally throw away; therefore, the usage of the leaves to the food and medical industry can lead to beneficial effects on the economy.
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Affiliation(s)
- Hasya Nazlı Gök
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Ankara, 06330, Turkey
| | - Didem Deliorman Orhan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Ankara, 06330, Turkey
| | - İlhan Gürbüz
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Ankara, 06330, Turkey
| | - Mustafa Aslan
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Ankara, 06330, Turkey
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Eleftheriou P, Geronikaki A, Petrou A. PTP1b Inhibition, A Promising Approach for the Treatment of Diabetes Type II. Curr Top Med Chem 2019; 19:246-263. [PMID: 30714526 DOI: 10.2174/1568026619666190201152153] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/18/2018] [Accepted: 01/07/2019] [Indexed: 01/29/2023]
Abstract
BACKGROUND Diabetes Mellitus (DM), is a metabolic disorder characterized by high blood glucose levels. The main types of diabetes mellitus are Diabetes mellitus type I, Diabetes mellitus type II, gestational diabetes and Diabetes of other etiology. Diabetes type II, the Non Insulin Dependent Type (NIDDM) is the most common type, characterized by the impairment in activation of the intracellular mechanism leading to the insertion and usage of glucose after interaction of insulin with its receptor, known as insulin resistance. Although, a number of drugs have been developed for the treatment of diabetes type II, their ability to reduce blood glucose levels is limited, while several side effects are also observed. Furthermore, none of the market drugs targets the enhancement of the action of the intracellular part of insulin receptor or recuperation of the glucose transport mechanism in GLUT4 dependent cells. The Protein Tyrosine Phosphatase (PTP1b) is the main enzyme involved in insulin receptor desensitization and has become a drug target for the treatment of Diabetes type II. Several PTP1b inhibitors have already been found, interacting with the binding site of the enzyme, surrounding the catalytic amino acid Cys215 and the neighboring area or with the allosteric site of the enzyme, placed at a distance of 20 Å from the active site, around Phe280. However, the research continues for finding more potent inhibitors with increased cell permeability and specificity. OBJECTIVE The aim of this review is to show the attempts made in developing of Protein Tyrosine Phosphatase (PTP1b) inhibitors with high potency, selectivity and bioavailability and to sum up the indications for favorable structural characteristics of effective PTP1b inhibitors. METHODS The methods used include a literature survey and the use of Protein Structure Databanks such as PuBMed Structure and RCSB and the tools they provide. CONCLUSION The research for finding PTP1b inhibitors started with the design of molecules mimicking the Tyrosine substrate of the enzyme. The study revealed that an aromatic ring connected to a polar group, which preferably enables hydrogen bond formation, is the minimum requirement for small inhibitors binding to the active site surrounding Cys215. Molecules bearing two hydrogen bond donor/acceptor (Hb d/a) groups at a distance of 8.5-11.5 Å may form more stable complexes, interacting simultaneously with a secondary area A2. Longer molecules with two Hb d/a groups at a distance of 17 Å or 19 Å may enable additional interactions with secondary sites (B and C) that confer stability as well as specificity. An aromatic ring linked to polar or Hb d/a moieties is also required for allosteric inhibitors. A lower distance between Hb d/a moieties, around 7.5 Å may favor allosteric interaction. Permanent inhibition of the enzyme by oxidation of the catalytic Cys215 has also been referred. Moreover, covalent modification of Cys121, placed near but not inside the catalytic pocket has been associated with permanent inhibition of the enzyme.
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Affiliation(s)
- Phaedra Eleftheriou
- Department of Medical Laboratory Studies, School of Health and Medical Care, Alexander Technological Educational Institute of Thessaloniki, Thessaloniki 57400, Greece
| | - Athina Geronikaki
- Department of Pharmacy, School of Health, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
| | - Anthi Petrou
- Department of Pharmacy, School of Health, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece
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Eleftheriou P, Therianou E, Lazari D, Dirnali S, Micha A. Docking Assisted Prediction and Biological Evaluation of Sideritis L. Components with PTP1b Inhibitory Action and Probable Anti-Diabetic Properties. Curr Top Med Chem 2019; 19:383-392. [DOI: 10.2174/1568026619666190219104430] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 02/09/2019] [Accepted: 02/11/2019] [Indexed: 12/13/2022]
Abstract
Background:
The main characteristic of Diabetes type II is the impaired activation of intracellular
mechanisms triggered by the action of insulin. PTP1b is a Protein Tyrosine Phosphatase that
dephosphorylates insulin receptor causing its desensitization. Since inhibition of PTP1b may prolong
insulin receptor activity, PTP1b has become a drug target for the treatment of Diabetes II. Although a
number of inhibitors have been synthesized during the last decades, the research still continues for the
development of more effective and selective compounds. Moreover, several constituents of plants and
edible algae with PTP1b inhibitory action have been found, adding this extra activity at the pallet of
properties of the specific natural products.
Objective:
Sideritis L. (Lamiaceae) is a herbal plant growing around the Mediterranean sea which is included
in the Mediterranean diet for centuries. The present study is the continuation of a previous work
where the antioxidant and anti-inflammatory activities of the components of Sideritis L. were evaluated
and aimed to investigate the potential of some sideritis’s components to act as PTP1b inhibitors, thus
exhibiting the beneficial effect in the treatment of diabetes II.
Methods:
Docking analysis was done to predict PTP1b inhibitory action. Human recombinant PTP1b
enzyme was used for the evaluation of the PTP1b inhibitory action, while inhibition of the human LAR
and human T-cell PTP was tested for the estimation of the selectivity of the compounds.
Conclusion:
Docking analysis effectively predicted inhibition and mode of inhibitory action. According
to the experimental results, four of the components exhibited PTP1b inhibitory action. The most active
ones were acetoside, which acted as a competitive inhibitor, with an IC50 of 4 µM and lavandufolioside,
which acted as an uncompetitive inhibitor, with an IC50 of 9.3 µM. All four compounds exhibited increased
selectivity against PTP1b.
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Affiliation(s)
- Phaedra Eleftheriou
- Department of Medical Laboratory Studies, School of Health and Medical Care, Alexander Technological Educational Institute of Thessaloniki, ATEITH Campus, Sindos, 57400, Thessaloniki, Greece
| | - Ekaterini Therianou
- Department of Medical Laboratory Studies, School of Health and Medical Care, Alexander Technological Educational Institute of Thessaloniki, ATEITH Campus, Sindos, 57400, Thessaloniki, Greece
| | - Diamanto Lazari
- Laboratory of Pharmacognosy, Division of Pharmacognosy-Pharmacology, School of Pharmacy, Faculty of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
| | - Stavroula Dirnali
- Department of Medical Laboratory Studies, School of Health and Medical Care, Alexander Technological Educational Institute of Thessaloniki, ATEITH Campus, Sindos, 57400, Thessaloniki, Greece
| | - Anna Micha
- Department of Medical Laboratory Studies, School of Health and Medical Care, Alexander Technological Educational Institute of Thessaloniki, ATEITH Campus, Sindos, 57400, Thessaloniki, Greece
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Qin L, Zhao Y, Zhang B, Li Y. Amentoflavone improves cardiovascular dysfunction and metabolic abnormalities in high fructose and fat diet-fed rats. Food Funct 2018; 9:243-252. [PMID: 29168869 DOI: 10.1039/c7fo01095h] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Metabolic syndrome (MS) is a leading cause of mortality and morbidity in Western countries.
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Affiliation(s)
- Li Qin
- Cardiovascular Medicine Ward 2
- Zhengzhou Central Hospital Affiliated to Zhengzhou University (Zhengzhou Central Hospital)
- Zhengzhou 450000
- China
| | - Ying Zhao
- Cardiovascular Medicine Ward 5
- The First Affiliated Hospital of Zhengzhou University
- Zhengzhou 450000
- China
| | - Bin Zhang
- The clinical Laboratory
- The First Affiliated Hospital of Xinxiang Medical University
- Weihui 453100
- China
| | - Yan Li
- Cardiovascular Medicine Ward 2
- Zhengzhou Central Hospital Affiliated to Zhengzhou University (Zhengzhou Central Hospital)
- Zhengzhou 450000
- China
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Yu S, Yan H, Zhang L, Shan M, Chen P, Ding A, Li SFY. A Review on the Phytochemistry, Pharmacology, and Pharmacokinetics of Amentoflavone, a Naturally-Occurring Biflavonoid. Molecules 2017; 22:E299. [PMID: 28212342 PMCID: PMC6155574 DOI: 10.3390/molecules22020299] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 02/11/2017] [Accepted: 02/14/2017] [Indexed: 12/27/2022] Open
Abstract
Amentoflavone (C30H18O10) is a well-known biflavonoid occurring in many natural plants. This polyphenolic compound has been discovered to have some important bioactivities, including anti-inflammation, anti-oxidation, anti-diabetes, and anti-senescence effects on many important reactions in the cardiovascular and central nervous system, etc. Over 120 plants have been found to contain this bioactive component, such as Selaginellaceae, Cupressaceae, Euphorbiaceae, Podocarpaceae, and Calophyllaceae plant families. This review paper aims to profile amentoflavone on its plant sources, natural derivatives, pharmacology, and pharmacokinetics, and to highlight some existing issues and perspectives in the future.
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Affiliation(s)
- Sheng Yu
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210023, China.
| | - Hui Yan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210023, China.
| | - Li Zhang
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210023, China.
| | - Mingqiu Shan
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210023, China.
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
| | - Peidong Chen
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210023, China.
| | - Anwei Ding
- Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, College of Pharmacy, Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210023, China.
| | - Sam Fong Yau Li
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
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Chen G, Han Y, He W, Liang F. Amentoflavone protects against high fat-induced metabolic dysfunction: Possible role of the regulation of adipogenic differentiation. Int J Mol Med 2016; 38:1759-1767. [PMID: 27748827 PMCID: PMC5117752 DOI: 10.3892/ijmm.2016.2772] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 09/22/2016] [Indexed: 12/15/2022] Open
Abstract
In the present study, we evaluated the protective effects of amentoflavone (AMF) against high-fat (HF) diet-induced metabolic dysfunction and focused on the influence of AMF on adipogenic differentiation during 3T3-L1 adipocyte differentiation. For this purpose, male Wistar rats were fed a HF diet or a HF diet with AMF (10 or 50 mg/kg). We found that AMF protected against HF diet-induced metabolic dysfunction in a dose-dependent manner, as evidenced by a decrease in the fasting blood glucose levels, fasting insulin levels and the homeostatic model assessment-insulin resistance index (HOMA-IR), as well as by a decrease in the glucose level, as shown by the intraperitoneal glucose tolerance test and intraperitoneal insulin tolerance test. Moreover, the results revealed that AMF significantly inhibited the increase in body weight, the weight of perirenal adipose tissues and the serum triglyceride (TG) content of the rats fed the HF diet in a dose-dependent manner. AMF also inhibited the accumulation of oil droplets in differentiated 3T3-L1 adipocytes in a concentration-dependent manner. The incubation of the cells with AMF for 0–8, 0–2, 2–4, or 4–8 days markedly inhibited adipogenesis. During the early phase of the adipocyte differentiation of 3T3-L1 cells, AMF decreased CCAAT/enhancer-binding protein (C/EBP) β expression in a concentration-dependent manner, leading to the inhibition of mitotic clonal expansion (MCE). Moreover, our results demonstrated that AMF significantly increased reactive oxygen species (ROS) generation in the cells and the antioxidant, N-acetylcysteine (NAC), markedly attenuated the inhibitory effects of AMF on adipogenesis. AMF also inhibited the expression of peroxisome proliferator-activated receptor γ (PPARγ) and C/EBPα and the expression of downstream targets in a concentration-dependent manner. The overexpression of PPARγ and C/EBPα (by transfection with respective overexpression plasmids) attentuated the inhibitory effects of AMF on the formation of oil droplets. The inhibitory effects of AMF on adipocyte differentiation may contribute to its protective effects against HF diet-induced metabolic dysfunction. Overall, the data in our study provide novel insight into the mechanisms responsible for the protective effects of AMF against HF diet-induced metabolic dysfunction and those for its inhibitory effect on adipocyte differentiation.
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Affiliation(s)
- Guangyong Chen
- Department of Pathology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, P.R. China
| | - Yangdong Han
- Department of Endocrinology, Xi'an No. 1 Hospital, Xi'an, Shaanxi 710002, P.R. China
| | - Wang He
- Department of Endocrinology, Xi'an No. 1 Hospital, Xi'an, Shaanxi 710002, P.R. China
| | - Feng Liang
- Affiliated Hospital of the Chinese Academy of Military Medical Sciences, Beijing 100071, P.R. China
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Evaluation of licorice flavonoids as protein tyrosine phosphatase 1B inhibitors. Bioorg Med Chem Lett 2013; 23:5836-9. [DOI: 10.1016/j.bmcl.2013.08.102] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 08/23/2013] [Accepted: 08/27/2013] [Indexed: 11/19/2022]
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Jiang CS, Liang LF, Guo YW. Natural products possessing protein tyrosine phosphatase 1B (PTP1B) inhibitory activity found in the last decades. Acta Pharmacol Sin 2012; 33:1217-45. [PMID: 22941286 PMCID: PMC4002712 DOI: 10.1038/aps.2012.90] [Citation(s) in RCA: 153] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 06/08/2012] [Indexed: 12/19/2022] Open
Abstract
This article provides an overview of approximately 300 secondary metabolites with inhibitory activity against protein tyrosine phosphatase 1B (PTP1B), which were isolated from various natural sources or derived from synthetic process in the last decades. The structure-activity relationship and the selectivity of some compounds against other protein phosphatases were also discussed. Potential pharmaceutical applications of several PTP1B inhibitors were presented.
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Affiliation(s)
- Cheng-shi Jiang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Lin-fu Liang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yue-wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
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Ha LM, Thao DT, Huong HT, Minh CV, Dat NT. Toxicity and anticancer effects of an extract fromSelaginella tamariscinaon a mice model. Nat Prod Res 2012; 26:1130-4. [DOI: 10.1080/14786419.2011.560847] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Sobhia ME, Paul S, Shinde R, Potluri M, Gundam V, Kaur A, Haokip T. Protein tyrosine phosphatase inhibitors: a patent review (2002 – 2011). Expert Opin Ther Pat 2012; 22:125-53. [DOI: 10.1517/13543776.2012.661414] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Abstract
There is a rising worldwide prevalence of diabetes, especially type 2 diabetes mellitus (T2DM), which is one of the most challenging health problems in the 21st century. The associated complications of diabetes, such as cardiovascular disease, peripheral vascular disease, stroke, diabetic neuropathy, amputations, renal failure, and blindness result in increasing disability, reduced life expectancy, and enormous health costs. T2DM is a polygenic disease characterized by multiple defects in insulin action in tissues and defects in pancreatic insulin secretion, which eventually leads to loss of pancreatic insulin-secreting cells. The treatment goals for T2DM patients are effective control of blood glucose, blood pressure, and lipids (if elevated) and, ultimately, to avert the serious complications associated with sustained tissue exposure to excessively high glucose concentrations. Prevention and control of diabetes with diet, weight control, and physical activity has been difficult. Treatment of T2DM has centered on increasing insulin levels, either by direct insulin administration or oral agents that promote insulin secretion, improving sensitivity to insulin in tissues, or reducing the rate of carbohydrate absorption from the gastrointestinal tract. This review presents comprehensive and up-to-date information on the mechanism(s) of action, efficacy, pharmacokinetics, pleiotropic effects, drug interactions, and adverse effects of the newer antidiabetic drugs, including (1) peroxisome proliferator-activated-receptor-γ agonists (thiazolidinediones, pioglitazone, and rosiglitazone); (2) the incretin, glucagon-like peptide-) receptor agonists (incretin-mimetics, exenatide. and liraglutide), (3) inhibitors of dipeptidyl-peptidase-4 (incretin enhancers, sitagliptin, and vildagliptin), (4) short-acting, nonsulfonylurea secretagogue, meglitinides (repaglinide and nateglinide), (5) amylin anlog-pramlintide, (6) α-glucosidase inhibitors (miglitol and voglibose), and (7) colesevelam (a bile acid sequestrant). In addition, information is presented on drug candidates in clinical trials, experimental compounds, and some plants used in the traditional treatment of diabetes based on experimental evidence. In the opinion of this reviewer, therapy based on orally active incretins and incretin mimetics with long duration of action that will be efficacious, preserve the β-cell number/function, and block the progression of diabetes will be highly desirable. However, major changes in lifestyle factors such as diet and, especially, exercise will also be needed if the growing burden of diabetes is to be contained.
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Zheng XK, Li YJ, Zhang L, Feng WS, Zhang X. Antihyperglycemic activity of Selaginella tamariscina (Beauv.) Spring. JOURNAL OF ETHNOPHARMACOLOGY 2011; 133:531-537. [PMID: 20969941 DOI: 10.1016/j.jep.2010.10.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Revised: 10/12/2010] [Accepted: 10/13/2010] [Indexed: 05/30/2023]
Abstract
AIM OF THE STUDY The present study was designed to investigate the effects of the EtOH and H(2)O extracts of Selaginella tamariscina (Beauv.) Spring on hyperglycemia in diabetic rats and HepG2 cells, and to confirm the active fractions of EtOH extract in HepG2 cells. MATERIALS AND METHODS HepG2 cells and type II diabetic rats induced by low-dose streptozotocin (STZ) and high-fat diet (HFD) were used to evaluate the hypoglycemic effect of EtOH and H(2)O extracts of Selaginella tamariscina. HepG2 cells were used to evaluate the promotive effect of different fractions of EtOH extract obtained from a polyamide column on glucose utilization. RESULTS The results in HepG2 cells indicated that the EtOH extract had a better hypoglycemic effect than the H(2)O extract. The results in diabetic rats indicated that both EtOH extract and H(2)O extract were able to ameliorate the fasting blood glucose (FBG) level and improve oral glucose tolerance (OGTT). Total cholesterol (TC), triglyceride (TG), low density lipoprotein cholesterol (LDL-c), free fatty acids (FFA), tumor necrosis factor-α (TNF-α), alanine aminotransferase (ALT), aspartate aminotransferase (AST), blood urea nitrogen (BUN) and malondialdehyde (MDA) levels in serum were lowered. High density lipoprotein (HDL-c), insulin and superoxide dismutase (SOD) levels in serum were elevated as well as the hepatic glycogen content in diabetic rats. Compared with H(2)O extract, the effects of EtOH extract were more marked. The 80% ethanol fraction exhibited a stronger hypoglycemic effect than the aqueous and 50% ethanol fractions, but the 95% ethanol fraction did not show any appreciable effects in HepG2 cells. CONCLUSIONS The results suggested that the EtOH extract had a better hypoglycemic effect than the H(2)O extract; the 80% ethanol fraction from polyamide column had a strong hypoglycemic activity in HepG2 cells.
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Affiliation(s)
- Xiao-ke Zheng
- Henan University of Traditional Chinese Medicine, Zhengzhou 450008, People's Republic of China
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Mukherjee S, Dhar R, Das AK. Analyzing the catalytic mechanism of protein tyrosine phosphatase PtpB from Staphylococcus aureus through site-directed mutagenesis. Int J Biol Macromol 2009; 45:463-9. [PMID: 19747503 DOI: 10.1016/j.ijbiomac.2009.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2009] [Revised: 08/30/2009] [Accepted: 09/02/2009] [Indexed: 11/30/2022]
Abstract
Protein tyrosine phosphatase B (PtpB) from Staphylococcus aureus, MRSA 252, is a low molecular weight protein tyrosine phosphatase involved in its pathogenicity. PtpB has been modeled in silico and site-directed mutagenesis performed to ascertain the importance of active site residues Cys8, Arg14, Ser15 and Asp120 in its catalytic mechanism. Kinetic characterization of wild-type and the mutant PtpBs, C8S, R14A, S15T, S15A, D120A, D120E, D120N revealed the reaction mechanism followed by this LMWPTPase. The mutations caused major changes in the local environment resulting in significant decrease of its catalytic activity. Inhibition kinetics for the wild-type enzyme was performed with maleimide and maleimidobutyric acid.
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Affiliation(s)
- Somnath Mukherjee
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
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Jang J, Na M, Thuong PT, Njamen D, Mbafor JT, Fomum ZT, Woo ER, Oh WK. Prenylated Flavonoids with PTP1B Inhibitory Activity from the Root Bark of Erythrina mildbraedii. Chem Pharm Bull (Tokyo) 2008; 56:85-8. [DOI: 10.1248/cpb.56.85] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- JunPil Jang
- Korea Research Institute of Bioscience and Biotechnology (KRIBB)
| | - MinKyun Na
- Korea Research Institute of Bioscience and Biotechnology (KRIBB)
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