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Lin Y, Pan J, Liu Y, Yang H, Wu G, Pan Y. Acanthopanax trifoliatus (L.) Merr polysaccharides ameliorates hyperglycemia by regulating hepatic glycogen metabolism in type 2 diabetic mice. Front Nutr 2023; 10:1111287. [PMID: 36845056 PMCID: PMC9948035 DOI: 10.3389/fnut.2023.1111287] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 01/12/2023] [Indexed: 02/11/2023] Open
Abstract
INTRODUCTION Drug monotherapy was inadequate in controlling blood glucose levels and other comorbidities. An agent that selectively tunes multiple targets was regarded as a new therapeutic strategy for type 2 diabetes. Acanthopanax trifoliatus (L.) Merr polysaccharide (ATMP) is a bio-macromolecule isolated from Acanthopanax trifoliatus (L.) Merr and has therapeutic potential for diabetes management due to its anti-hyperglycemia activity. METHODS Type 2 diabetes mellitus was induced in mice using streptozotocin, and 40 and 80 mg/kg ATMP was administered daily via the intragastric route for 8 weeks. Food intake, water intake, and body weight were recorded. The fasting blood glucose (FBG), fasting insulin (FINS) and an oral glucose tolerance test (OGTT) were performed. Histological changes in the liver and pancreas were analyzed by H&E staining. The mRNA and the protein levels of key factors involved in glycogen synthesis, glycogenolysis, and gluconeogenesis were measured by quantitative real time PCR and Western blotting. RESULTS In this study, we found that ATMP could effectively improve glucose tolerance and alleviate insulin resistance by promoting insulin secretion and inhibiting glucagon secretion. In addition, ATMP decreases glycogen synthesis by inhibiting PI3K/Akt/GSK3β signaling, reduces glycogenolysis via suppressing cAMP/PKA signaling, and suppresses liver gluconeogenesis by activating AMPK signaling. CONCLUSION Together, ATMP has the potential to be developed as a new multitargets therapeutics for type 2 diabetes.
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Affiliation(s)
- Yuzi Lin
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jinghua Pan
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yue Liu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Huiwen Yang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Guoyu Wu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
- Key Specialty of Clinical Pharmacy, The First Affiliated Hospital of Guangdong Pharmaceutical University, Guangzhou, China
- *Correspondence: Guoyu Wu, ✉
| | - Yufang Pan
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Advanced Drug Delivery and Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System, Guangdong Pharmaceutical University, Guangzhou, China
- Yufang Pan, ✉
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Long-term pharmacokinetic and pharmacological evaluations of a novel indole-benzazepinone derivative on obese Type 2 diabetes mellitus. Future Med Chem 2022; 14:1495-1506. [DOI: 10.4155/fmc-2022-0115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: Owing to the chronic nature of Type 2 diabetes mellitus, antidiabetic drugs must have long-lasting efficacy. Compound 1 has a good inhibitory effect on acute hyperglycemia, but its long-term hypoglycemic effect has not been evaluated. Results: Preliminary prediction and in vitro experimental pharmacokinetic results support the use of compound 1 for long-term in vivo experiments. Long-term experiments demonstrated that compound 1 significantly reduces blood glucose, improves the oral glucose tolerance of obese mice and has a positive effect on body weight, free fatty acid, hepatocyte steatosis and inflammatory cell infiltration. Conclusion: These findings lay a good foundation for the further exploration and development of novel glycogen phosphorylase inhibitors.
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Biomimetic Radical Chemistry and Applications. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072042. [PMID: 35408441 PMCID: PMC9000372 DOI: 10.3390/molecules27072042] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 03/16/2022] [Indexed: 01/02/2023]
Abstract
Some of the most interesting aspects of free radical chemistry that emerged in the last two decades are radical enzyme mechanisms, cell signaling cascades, antioxidant activities, and free radical-induced damage of biomolecules. In addition, identification of modified biomolecules opened the way for the evaluation of in vivo damage through biomarkers. When studying free radical-based chemical mechanisms, it is very important to establish biomimetic models, which allow the experiments to be performed in a simplified environment, but suitably designed to be in strict connection with cellular conditions. The 28 papers (11 reviews and 17 articles) published in the two Special Issues of Molecules on "Biomimetic Radical Chemistry and Applications (2019 and 2021)" show a remarkable range of research in this area. The biomimetic approach is presented with new insights and reviews of the current knowledge in the field of radical-based processes relevant to health, such as biomolecular damages and repair, signaling and biomarkers, biotechnological applications, and novel synthetic approaches.
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Minadakis MP, Mavreas K, Neofytos DD, Paschou M, Kogkaki A, Athanasiou V, Mamais M, Veclani D, Iatrou H, Venturini A, Chrysina ED, Papazafiri P, Gimisis T. A glucose-based molecular rotor inhibitor of glycogen phosphorylase as a probe of cellular enzymatic function. Org Biomol Chem 2022; 20:2407-2423. [DOI: 10.1039/d1ob02211c] [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
Molecular rotors belong to a family of fluorescent compounds characterized as molecular switches, where a fluorescence on/off signal signifies a change in the molecule’s microenvironment. Herein, the successful synthesis and...
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Effects of sweet corncob polysaccharide on pancreatic protein expression in type 2 diabetic rats. J Funct Foods 2022. [DOI: 10.1016/j.jff.2021.104908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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La Ferla B, D’Orazio G. Pyranoid Spirosugars as Enzyme Inhibitors. Curr Org Synth 2021; 18:3-22. [DOI: 10.2174/1570179417666200924152648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/25/2020] [Accepted: 08/31/2020] [Indexed: 11/22/2022]
Abstract
Background:
Pyranoid spirofused sugar derivatives represent a class of compounds with a significant
impact in the literature. From the structural point of view, the rigidity inferred by the spirofused entity has made
these compounds object of interest mainly as enzymatic inhibitors, in particular, carbohydrate processing enzymes.
Among them glycogen phosphorylase and sodium glucose co-transporter 2 are important target enzymes
for diverse pathological states. Most of the developed compounds present the spirofused entity at the C1 position
of the sugar moiety; nevertheless, spirofused entities can also be found at other sugar ring positions. The main
spirofused entities encountered are spiroacetals/thioacetals, spiro-hydantoin and derivatives, spiro-isoxazolines,
spiro-aminals, spiro-lactams, spiro-oxathiazole and spiro-oxazinanone, but also others are present.
Objectives:
The present review focuses on the most explored synthetic strategies for the preparation of this class
of compounds, classified according to the position and structure of the spirofused moiety on the pyranoid scaffold.
Moreover, the structures are correlated to their main biological activities or to their role as chiral auxiliaries.
Conclusion:
It is clear from the review that, among the different derivatives, the spirofused structures at position
C1 of the pyranoid scaffold are the most represented and possess the most relevant enzymatic inhibitor activities.
Nevertheless, great efforts have been devoted to the introduction of the spirofused entity also in the other positions,
mainly for the preparation of biologically active compounds but also for the synthesis of chiral auxiliaries
useful in asymmetric reactions; examples of such auxiliaries are the spirofused chiral 1,3-oxazolidin-2-ones and
1,3-oxazolidine-2-thiones.
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Affiliation(s)
- Barbara La Ferla
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Milan, Italy
| | - Giuseppe D’Orazio
- Department of Biotechnology and Bioscience, University of Milano-Bicocca, Milan, Italy
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Liu X, Wang K, Zhou J, Sullivan MA, Liu Y, Gilbert RG, Deng B. Metformin and Berberine suppress glycogenolysis by inhibiting glycogen phosphorylase and stabilizing the molecular structure of glycogen in db/db mice. Carbohydr Polym 2020; 243:116435. [PMID: 32532388 DOI: 10.1016/j.carbpol.2020.116435] [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: 12/23/2019] [Revised: 04/18/2020] [Accepted: 05/08/2020] [Indexed: 01/08/2023]
Abstract
Glycogen is a branched glucose polymer involved in sustaining blood glucose homeostasis. Liver glycogen comprises α particles (up to 300 nm in diameter) made of joined β particles (∼20 nm in diameter). Glycogen α particles in a mouse model for diabetes are molecularly fragile, breaking down into smaller β particles more readily than in healthy mice. Glycogen phosphorylase (GP), a rate-limiting enzyme in glycogen degradation, is overexpressed in diabetic mice. This study shows that Metformin and Berberine, two common drugs, two common drugs used to treat diabetes, are able to revert the liver glycogen of diabetic mice to the stable structure seen in non-diabetic mice. It is also shown that these drugs reduce the GP level via the cAMP/PKA signaling pathway in diabetic livers and decrease the affinity of GP with the glycogen of db/db mice. These effects of these drugs may slow down the degradation of liver glycogen and improve glucose homeostasis.
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Affiliation(s)
- Xiaocui Liu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Kaiping Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Jing Zhou
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Mitchell A Sullivan
- Glycation and Diabetes Group, Mater Research Institute-The University of Queensland, Translational Research Institute, Brisbane, Queensland, 4072, Australia
| | - Yage Liu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Robert G Gilbert
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, College of Agriculture, Yangzhou University, 225009, Yangzhou, Jiangsu Province, China; Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Brisbane, Queensland, 4072, Australia
| | - Bin Deng
- Department of Pharmacy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
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