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Sarkar K, Chatterjee A, Bankura B, Bank S, Paul N, Chatterjee S, Das A, Dutta K, Chakraborty S, De S, Al-Masud AA, Khan GA, Chattopadhyay D, Das M. Efficacy of pegylated Graphene oxide quantum dots as a nanoconjugate sustained release metformin delivery system in in vitro insulin resistance model. PLoS One 2024; 19:e0307166. [PMID: 39133725 PMCID: PMC11318915 DOI: 10.1371/journal.pone.0307166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 07/01/2024] [Indexed: 08/15/2024] Open
Abstract
Metformin, the primary therapy for type 2 diabetes mellitus (T2DM), showed limitations such as varying absorption, rapid system clearance, required large amount, resistance, longstanding side effects. Use of Nano formulations for pharmaceuticals is emerging as a viable technique to reduce negative consequences of drug, while simultaneously attaining precise release and targeted distribution. This study developed a Polyethylene Glycol conjugated Graphene Oxide Quantum dots (GOQD-PEG) nanocomposite for the sustained release of metformin. Herein, we evaluated the effectiveness of metformin-loaded nanoconjugate in in vitro insulin resistance model. Results demonstrated drug loaded nanoconjugate successfully restored glucose uptake and reversed insulin resistance in in vitro conditions at reduced dosage compared to free metformin.
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Affiliation(s)
- Kunal Sarkar
- Department of Zoology, University of Calcutta, Kolkata, India
| | | | | | - Sarbashri Bank
- Department of Zoology, University of Calcutta, Kolkata, India
| | - Nirvika Paul
- Department of Zoology, University of Calcutta, Kolkata, India
| | | | - Anwesha Das
- Department of Zoology, University of Calcutta, Kolkata, India
| | - Koushik Dutta
- Department of Polymer Science and Technology, University of Calcutta, Kolkata, India
| | | | - Sriparna De
- Department of Allied Health Sciences, Brainware University, Kolkata, India
| | - Alaa A. Al-Masud
- Tissue Biobank Section, Research Department, Natural and Health Science Research Center, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Gausal Azam Khan
- Department of Clinical Nutrition, College of Applied Medical Sciences, King Faisal University, Al ASHA, KSA
| | | | - Madhusudan Das
- Department of Zoology, University of Calcutta, Kolkata, India
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Zhang Y, Qin C, Wang J, Yang L, Yan X, Zhi S, Nie G. Phosphofructokinase family genes in grass carp: Molecular identification and tissue-specific expression in response to glucose, insulin and glucagon. Comp Biochem Physiol B Biochem Mol Biol 2024; 269:110898. [PMID: 37673204 DOI: 10.1016/j.cbpb.2023.110898] [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: 06/14/2023] [Revised: 09/02/2023] [Accepted: 09/02/2023] [Indexed: 09/08/2023]
Abstract
It is widely acknowledged that glucose serves as the primary energy source for organisms. However, fish exhibit persistent postprandial hyperglycemia and are thought to have low glucose tolerance. Glycolysis serves as the ubiquitous pathway for glucose catabolism, with phosphofructokinase (PFK) acting as a crucial rate-limiting enzyme in this process and playing an indispensable role. PFK is classified into three isoforms based on their major expression sites, i.e., PFKM (skeletal muscle type), PFKL (liver type) and PFKP (platelet type). In this study, grass carp (Ctenopharyngodon idella) was used as animal model and the open reading frame (ORF) sequences of six PFK genetic isoforms of grass carp were cloned. Real-time PCR was used to detect its tissue distribution, and expression changes in oral glucose tolerance test (OGTT), insulin and glucagon injection experiments. The results showed that the ORF of pfkla, pfklb, pfkma, pfkmb, pfkpa and pfkpb genes was 2343, 2340, 2355, 2331, 2364 and 2349 bp in length, respectively. The results of tissue distribution showed that pfkla and pfklb, homologous to mammalian pfkl, exhibited low expression levels in the liver of grass carp, but were expressed at the highest level in the brain. Muscle-type pfkma and pfkmb mRNA were found to be highly expressed in both red and white muscle, with pfkmb also exhibiting high expression levels in the heart, while platelet type pfkpa and pfkpb showed high mRNA abundances in the brain and heart. Oral glucose administration stimulated pfkma and pfkmb mRNA expression in the red muscle, and up-regulated pfklb mRNA levels in the liver at 3 h post treatment, but it suppressed liver-type and platelet-type PFK genes expression in the brain. The expression of pfkmb in white muscle and pfkmb and pfkpb in heart were promoted by insulin, whereas the expression of pfkla and pfkpb in the brain, pfkma and pfkmb in the red muscle, pfkma in the white muscle, and pfklb in the liver was suppressed by insulin. As for glucagon, it inhibited pfkma and pfkmb mRNA expression in the red muscle, as well as pfklb in the liver, but it up-regulated PFK genes expression in most tissues detected, such as brain (pfklb, pfkpa and pfkpb), white muscle (pfkma and pfkmb), liver (pfkla) and heart (pfkmb and pfkpb). Our results suggest that PFK family genes have different or even opposite expression patterns in response to glucose, insulin and glucagon stimulation in various tissues of grass carp, which may contribute to glucose intolerance in fish.
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Affiliation(s)
- Yingxin Zhang
- College of Life Science, Henan Normal University, No. 46 Jianshe Road, Xinxiang 453007, PR China.
| | - Chaobin Qin
- College of Fisheries, Henan Normal University, No. 46 Jianshe Road, Xinxiang 453007, PR China.
| | - Junli Wang
- College of Life Science, Henan Normal University, No. 46 Jianshe Road, Xinxiang 453007, PR China
| | - Liping Yang
- College of Fisheries, Henan Normal University, No. 46 Jianshe Road, Xinxiang 453007, PR China
| | - Xiao Yan
- College of Fisheries, Henan Normal University, No. 46 Jianshe Road, Xinxiang 453007, PR China
| | - Shaoyang Zhi
- College of Fisheries, Henan Normal University, No. 46 Jianshe Road, Xinxiang 453007, PR China
| | - Guoxing Nie
- College of Fisheries, Henan Normal University, No. 46 Jianshe Road, Xinxiang 453007, PR China.
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Sakr S, Rashad WA. Lambda-cyhalothrin-induced pancreatic toxicity in adult albino rats. Sci Rep 2023; 13:11562. [PMID: 37463968 DOI: 10.1038/s41598-023-38661-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 07/12/2023] [Indexed: 07/20/2023] Open
Abstract
Lambda-cyhalothrin (LCT) is one of the most frequently utilized pyrethroids. This study aimed to explore the toxic effects of subacute exposure to LCT on the pancreas and the hepatic glucose metabolism in adult male albino rats. 20 rats were equally grouped into; Control group and LCT group. The latter received LCT (61.2 mg/kg b.wt.), orally on a daily basis for 28 days. At the end of experiment, blood samples were collected for the determination of serum glucose and insulin levels. Pancreases were harvested and levels of malondialdehyde (MDA); catalase (CAT); superoxide dismutase (SOD); reduced glutathione (GSH); tumor necrosis factor-α (TNF-α); interleukin-6 (IL-6); nuclear factor erythroid 2-related factor 2 (Nrf2); heme oxygenase 1 (HO-1); and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) were assessed. Also, liver samples were analyzed for the activity of glucose metabolism enzymes, glycogen content, and pyruvate and lactate concentrations. Histopathological and immunohistochemical examinations of pancreatic tissues were undertaken as well. Results revealed hyperglycemia, hypoinsulinemia, increased MDA, TNF-α, IL-6, and NF-κB levels, in association with reduced CAT, SOD, GSH, Nrf2, and HO-1 levels in LCT group. Liver analyses demonstrated a clear disturbance in the hepatic enzymes of glucose metabolism, diminished glycogen content, decreased pyruvate, and increased lactate concentrations. Besides, pancreatic islets displayed degenerative changes and β-cells loss. Immunohistochemistry revealed diminished area percentage (%) of insulin and Nrf2 and increased TNF-α immunoreaction. In conclusion, subacute exposure to LCT induces pancreatic toxicity, mostly via oxidative and inflammatory mechanisms, and dysregulates hepatic glucose metabolism in albino rats.
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Affiliation(s)
- Samar Sakr
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Zagazig University, Zagazig, Egypt.
| | - Walaa A Rashad
- Department of Anatomy and Embryology, Faculty of Medicine, Zagazig University, Zagazig, Egypt
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Bakar MHA, Shahril NSN, Khalid MSFM, Mohammad S, Shariff KA, Karunakaran T, Salleh RM, Rosdi MN. Celastrol alleviates high-fat diet-induced obesity via enhanced muscle glucose utilization and mitochondrial oxidative metabolism-mediated upregulation of pyruvate dehydrogenase complex. Toxicol Appl Pharmacol 2022; 449:116099. [DOI: 10.1016/j.taap.2022.116099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 05/23/2022] [Accepted: 06/01/2022] [Indexed: 12/25/2022]
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Oluranti OI, Agboola EA, Fubara NE, Ajayi MO, Michael OS. Cadmium exposure induces cardiac glucometabolic dysregulation and lipid accumulation independent of pyruvate dehydrogenase activity. Ann Med 2021; 53:1108-1117. [PMID: 34259114 PMCID: PMC8280890 DOI: 10.1080/07853890.2021.1947519] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 06/20/2021] [Indexed: 02/01/2023] Open
Abstract
CONTEXT Suppressed glucose metabolism, elevated fatty acid metabolism and lipid deposition within myocardial cells are the key pathological features of diabetic cardiomyopathy. Studies have associated cadmium exposure with metabolic disturbances. OBJECTIVE To examine the effects of cadmium exposure on cardiac glucose homeostasis and lipid accumulation in male Wistar rats. METHODS Male Wistar rats were treated for 21 days as (n = 5): Control, cadmium chloride Cd5 (5 mg/kg, p.o.), cadmium chloride Cd30 (30 mg/kg, p.o). RESULTS The fasting serum insulin level in this study decreased significantly. Pyruvate and hexokinase activity reduced significantly in the Cd5 group while no significant change in lactate and glycogen levels. The activity of pyruvate dehydrogenase enzyme significantly increased with an increasing dosage of cadmium. The free fatty acid, total cholesterol and triglyceride levels in the heart increased significantly with increasing dosage of cadmium when compared with the control. Lipoprotein lipase activity in the heart showed no difference in the Cd5 group but a reduction in the activity in the Cd30 group was observed. CONCLUSION This study indicates that cadmium exposure interferes with cardiac substrate handling resulting in impaired glucometabolic regulation and lipid accumulation which could reduce cardiac efficiency.
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Affiliation(s)
- Olufemi I. Oluranti
- Applied and Environmental Research Unit, Department of Physiology, College of Health Sciences, Bowen University, Iwo, Nigeria
| | - Ebunoluwa A. Agboola
- Applied and Environmental Research Unit, Department of Physiology, College of Health Sciences, Bowen University, Iwo, Nigeria
| | - Nteimam E. Fubara
- Applied and Environmental Research Unit, Department of Physiology, College of Health Sciences, Bowen University, Iwo, Nigeria
| | - Mercy O. Ajayi
- Applied and Environmental Research Unit, Department of Physiology, College of Health Sciences, Bowen University, Iwo, Nigeria
| | - Olugbenga S. Michael
- Cardiometabolic Research Unit, Department of Physiology, College of Health Sciences, Bowen University, Iwo, Nigeria
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Shoshan-Barmatz V, Anand U, Nahon-Crystal E, Di Carlo M, Shteinfer-Kuzmine A. Adverse Effects of Metformin From Diabetes to COVID-19, Cancer, Neurodegenerative Diseases, and Aging: Is VDAC1 a Common Target? Front Physiol 2021; 12:730048. [PMID: 34671273 PMCID: PMC8521008 DOI: 10.3389/fphys.2021.730048] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 08/24/2021] [Indexed: 12/13/2022] Open
Abstract
Metformin has been used for treating diabetes mellitus since the late 1950s. In addition to its antihyperglycemic activity, it was shown to be a potential drug candidate for treating a range of other diseases that include various cancers, cardiovascular diseases, diabetic kidney disease, neurodegenerative diseases, renal diseases, obesity, inflammation, COVID-19 in diabetic patients, and aging. In this review, we focus on the important aspects of mitochondrial dysfunction in energy metabolism and cell death with their gatekeeper VDAC1 (voltage-dependent anion channel 1) as a possible metformin target, and summarize metformin's effects in several diseases and gut microbiota. We question how the same drug can act on diseases with opposite characteristics, such as increasing apoptotic cell death in cancer, while inhibiting it in neurodegenerative diseases. Interestingly, metformin's adverse effects in many diseases all show VDAC1 involvement, suggesting that it is a common factor in metformin-affecting diseases. The findings that metformin has an opposite effect on various diseases are consistent with the fact that VDAC1 controls cell life and death, supporting the idea that it is a target for metformin.
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Affiliation(s)
- Varda Shoshan-Barmatz
- Department of Life Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
- National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Uttpal Anand
- Department of Life Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | | | - Marta Di Carlo
- Institute for Biomedical Research and Innovation, National Research Council, Palermo, Italy
| | - Anna Shteinfer-Kuzmine
- National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beersheba, Israel
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Obafemi TO, Jaiyesimi KF, Olomola AA, Olasehinde OR, Olaoye OA, Adewumi FD, Afolabi BA, Adewale OB, Akintayo CO, Ojo OA. Combined effect of metformin and gallic acid on inflammation, antioxidant status, endoplasmic reticulum (ER) stress and glucose metabolism in fructose-fed streptozotocin-induced diabetic rats. Toxicol Rep 2021; 8:1419-1427. [PMID: 34345595 PMCID: PMC8319514 DOI: 10.1016/j.toxrep.2021.07.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 06/11/2021] [Accepted: 07/15/2021] [Indexed: 12/19/2022] Open
Abstract
Metformin, gallic acid and a combination of both improved glucose metabolism and antioxidant status in diabetic rats. Metformin, gallic acid and a combination of both lowered levels of IL-6 and TNF-α in liver and pancreas of diabetic rats. Metformin, gallic acid and a combination of both decreased the expression of ATF4 in liver and pancreas of diabetic rats. Metformin/GA combination appeared more effective than metformin only and gallic acid only.
Over time, diabetes patients usually need combination therapy involving two or more agents, including phytonutrients to attain therapeutic targets. The purpose of this research is to elucidate the combined effect of metformin and gallic acid (GA) on glucose metabolism, inflammation as well as oxidative and endoplasmic reticulum (ER) stresses in fructose-fed diabetic rats. Thirty-five rats of Wistar strain were arbitrarily distributed into five groups, each containing seven animals as follows: normal control, diabetic control, groups administered 100 mg/kg bw metformin only, 50 mg/kg bw gallic acid only and a combination of both. Experimental animals were made diabetic by single injection of 40 mg/kg streptozotocin (intraperitoneally) subsequent to 14 days administration of 10 % fructose prior. Treatment of rats continued for 21 days following diabetes confirmation. Glucose and insulin levels as well as lipid profile were evaluated in the serum, while activities of catalase and superoxide dismutase were estimated in both liver and pancreas. In addition, levels of malondialdehyde, interleukin-6 and tumor necrosis factor-alpha, as well as expression of activating transcription factor-4 were evaluated in liver and pancreas of diabetic rats. Activities of glucose-6-phosphatase and glucokinase were also determined in liver of diabetic animals. Metformin only, GA only and combination of metformin and GA significantly improved antioxidant status and glucose homeostasis while inflammation and endoplasmic reticulum stress were significantly ameliorated in diabetic rats. Metformin/GA combination appeared to improve glucose metabolism by increasing insulin level and ameliorating the dysregulated activities of glucose metabolizing enzymes and ER stress better than either metformin only or GA only. It could be concluded that coadministration of metformin/GA produced a combined effect in ameliorating diabetes in Wistar rats and could be considered in treatment of diabetes.
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Affiliation(s)
- Tajudeen O Obafemi
- Department of Biochemistry, Afe Babalola University, PMB 5454, Ado-Ekiti, Nigeria
| | - Kikelomo F Jaiyesimi
- Department of Biochemistry, Afe Babalola University, PMB 5454, Ado-Ekiti, Nigeria
| | - Adenike A Olomola
- Department of Biochemistry, Afe Babalola University, PMB 5454, Ado-Ekiti, Nigeria
| | - Oluwaseun R Olasehinde
- Medical Biochemistry Unit, College of Health Sciences, Afe Babalola University, PMB 5454, Ado-Ekiti, Nigeria
| | - Oyindamola A Olaoye
- Department of Biochemistry, Afe Babalola University, PMB 5454, Ado-Ekiti, Nigeria
| | - Funmilayo D Adewumi
- Industrial Chemistry Programme, Department of Chemical Sciences, Afe Babalola University, PMB 5454, Ado-Ekiti, Nigeria
| | | | - Olusola B Adewale
- Department of Biochemistry, Afe Babalola University, PMB 5454, Ado-Ekiti, Nigeria
| | | | - Oluwafemi A Ojo
- Department of Biochemistry, Landmark University, PMB 1001, Omu-aran, Nigeria
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miR-378a-3p Participates in Metformin's Mechanism of Action on C2C12 Cells under Hyperglycemia. Int J Mol Sci 2021; 22:ijms22020541. [PMID: 33430391 PMCID: PMC7827403 DOI: 10.3390/ijms22020541] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/30/2020] [Accepted: 01/05/2021] [Indexed: 01/10/2023] Open
Abstract
Metformin is the most used biguanide drug for the treatment of type 2 diabetes mellitus. Despite being mostly known for its hepatic anti-gluconeogenic effect, it is also known to modulate microRNAs (miRNAs, miRs) associated with metabolic diseases. The latter mechanism could be relevant for better understanding metformin’s mechanisms underlying its biological effects. In the current work, we found that metformin increases miR-378a-3p expression (p < 0.002) in C2C12 myoblasts previously exposed to hyperglycemic conditions. While the inhibition of miR-378a-3p was shown to impair metformin’s effect in ATP production, PEPCK activity and the expression of Tfam. Finally, mitophagy, an autophagic process responsible for the selective degradation of mitochondria, was found to be induced by miR-378a-3p (p < 0.04). miR-378a-3p stimulated mitophagy through a process independent of sestrin-2 (SESN2), a stress-responsible protein that has been recently demonstrated to positively modulate mitophagy. Our findings provide novel insights into an alternative mechanism of action of metformin involving miR-378a-3, which can be used in the future for the development of improved therapeutic strategies against metabolic diseases.
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Amadi JA, Amadi PU, Njoku UC. Okra Modulates Regulatory Enzymes and Metabolites of Glucose-Utilizing Pathways in Diabetic Rats. J Am Coll Nutr 2020; 40:689-698. [PMID: 33031022 DOI: 10.1080/07315724.2020.1815249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVE Using a rat diabetes model, the authors examined how substrates and products of glycolysis and key regulatory enzymes for glycolysis, gluconeogenesis, Kreb's cycle, and glycogen metabolism react to treatment with okra diet therapy, relative to glibenclamide treatment. METHOD The animal grouping involved normoglycemic rats, untreated diabetic rats, and diabetic rats treated with glibenclamide, 50% w/w okra sauce, exclusive okra sauce diet, or sauce without okra. Alloxan monohydrate was the diabetogenic agent. Insulin and adiponectin were assayed with enzyme-linked immunosorbent assay (ELISA) while the metabolites and enzymes were assed using standard spectrophotometric methods. RESULTS The exclusive diet therapy significantly (p < 0.05) improved insulin activities after 60 days and reversed the altered adiponectin activities. Glucose-6-phosphate, fructose-6-phosphate, and fructose-1,6-bisphosphate levels were depleted during diabetes, but phosphoenolpyruvate and pyruvate accumulated during the first short phase of diabetes. Rats in the glibenclamide and 100% okra diet groups showed comparable hexokinase, phosphofructokinase, and pyruvate kinase activities relative to the normoglycemic rats, while the gluconeogenic enzymes, glucose-6-phosphatase, and fructose-1,6-bisphosphatase remained altered. The authors observed that extended treatment with glibenclamide restored the activities of all the Kreb's cycle enzymes, while succinate dehydrogenase and α-ketoglutarate dehydrogenase were nonresponsive to the okra diet therapy relative to their control levels. The glycogen stores were normalized by the exclusive diet therapy, but glycogen synthase and phosphorylase activities were unresponsive. CONCLUSIONS Okra diet has shown insulin-sensitizing potentials with prolonged intake during diabetes as well as the potential to reverse alterations in the major carbohydrate-metabolizing enzyme.
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Affiliation(s)
- Joy Adaku Amadi
- Department of Nutrition and Dietetics, Imo State University, Owerri, Imo State, Nigeria
| | - Peter Uchenna Amadi
- Department of Biochemistry, Imo State University, Owerri, Imo State, Nigeria
| | - Uche Chinedu Njoku
- Department of Biochemistry, University of Port Harcourt, Choba, Rivers State, Nigeria
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Márquez A, Aymerich J, Dei M, Rodríguez-Rodríguez R, Vázquez-Carrera M, Pizarro-Delgado J, Giménez-Gómez P, Merlos Á, Terés L, Serra-Graells F, Jiménez-Jorquera C, Domínguez C, Muñoz-Berbel X. Reconfigurable multiplexed point of Care System for monitoring type 1 diabetes patients. Biosens Bioelectron 2019; 136:38-46. [DOI: 10.1016/j.bios.2019.04.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/02/2019] [Accepted: 04/07/2019] [Indexed: 01/15/2023]
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11
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Effects of Centella asiatica on skeletal muscle structure and key enzymes of glucose and glycogen metabolism in type 2 diabetic rats. Biomed Pharmacother 2019; 112:108715. [DOI: 10.1016/j.biopha.2019.108715] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 02/20/2019] [Accepted: 02/20/2019] [Indexed: 12/19/2022] Open
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12
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Wang T, Zhang J, Hu M, Zhang Y, Cui P, Li X, Li J, Vestin E, Brännström M, Shao LR, Billig H. Differential Expression Patterns of Glycolytic Enzymes and Mitochondria-Dependent Apoptosis in PCOS Patients with Endometrial Hyperplasia, an Early Hallmark of Endometrial Cancer, In Vivo and the Impact of Metformin In Vitro. Int J Biol Sci 2019; 15:714-725. [PMID: 30745857 PMCID: PMC6367580 DOI: 10.7150/ijbs.31425] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 12/23/2018] [Indexed: 12/21/2022] Open
Abstract
The underlying mechanisms of polycystic ovarian syndrome (PCOS)-induced endometrial dysfunction are not fully understood, and although accumulating evidence shows that the use of metformin has beneficial effects in PCOS patients, the precise regulatory mechanisms of metformin on endometrial function under PCOS conditions have only been partially explored. To address these clinical challenges, this study aimed to assess the protein expression patterns of glycolytic enzymes, estrogen receptor (ER), and androgen receptor (AR) along with differences in mitochondria-dependent apoptosis in PCOS patients with and without endometrial hyperplasia in vivo and to investigate the effects of metformin in PCOS patients with endometrial hyperplasia in vitro. Here, we showed that compared to non-PCOS patients and PCOS patients without hyperplasia, the endometria from PCOS patients with hyperplasia had a distinct protein expression pattern of glycolytic enzymes, including pyruvate kinase isozyme M2 isoform (PKM2) and pyruvate dehydrogenase (PDH), and mitochondrial transcription factor A (TFAM). In PCOS patients with endometrial hyperplasia, increased glandular epithelial cell secretion and infiltrated stromal cells in the glands were associated with decreased PDH immunoreactivity in the epithelial cells. Using endometrial tissues from PCOS patients with hyperplasia, we found that in response to metformin treatment in vitro, hexokinase 2 (HK2) expression was decreased, whereas phosphofructokinase (PFK), PKM2, and lactate dehydrogenase A (LDHA) expression was increased compared to controls. Although there was no change in PDH expression, metformin treatment increased the expression of TFAM and cleaved caspase-3. Moreover, our in vivo study showed that while endometrial ERβ expression was no different between non-PCOS and PCOS patients regardless of whether or not hyperplasia was present, ERα and AR protein expression was gradually increased in women with PCOS following the onset of endometrial hyperplasia. Our in vitro study showed that treatment with metformin inhibited ERα expression without affecting ERβ expression. Our findings suggest that decreased glycolysis and increased mitochondrial activity might contribute to the onset of ERα-dependent endometrial hyperplasia and that metformin might directly reverse impaired glycolysis and normalize mitochondrial function in PCOS patients with endometrial hyperplasia.
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Affiliation(s)
- Tao Wang
- The School of Basic Medical Science, Heilongjiang University of Chinese Medicine, 150040 Harbin, China.,Department of Obstetrics and Gynecology, Key Laboratory and Unit of Infertility in Chinese Medicine, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, 150040 Harbin, China
| | - Jiao Zhang
- Department of Acupuncture and Moxibustion, Second Affiliated Hospital, Heilongjiang University of Chinese Medicine, 150040 Harbin, China
| | - Min Hu
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden.,Department of Traditional Chinese Medicine, The First Affiliated Hospital of Guangzhou Medical University, 510120 Guangzhou, China.,Institute of Integrated Traditional Chinese Medicine and Western Medicine, Guangzhou Medical University, 510120 Guangzhou, China
| | - Yuehui Zhang
- Department of Obstetrics and Gynecology, Key Laboratory and Unit of Infertility in Chinese Medicine, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, 150040 Harbin, China.,Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Peng Cui
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Xin Li
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden.,Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, 200011 Shanghai, China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, 200011 Shanghai, China
| | - Juan Li
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden.,Department of Traditional Chinese Medicine, The First Affiliated Hospital of Guangzhou Medical University, 510120 Guangzhou, China
| | - Edvin Vestin
- The School of Basic Medical Science, Heilongjiang University of Chinese Medicine, 150040 Harbin, China
| | - Mats Brännström
- Department of Obstetrics and Gynecology, Sahlgrenska University Hospital, Sahlgrenska Academy, University of Gothenburg, 41345 Gothenburg, Sweden
| | - Linus R Shao
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
| | - Håkan Billig
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy, University of Gothenburg, 40530 Gothenburg, Sweden
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13
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Ausina P, Da Silva D, Majerowicz D, Zancan P, Sola-Penna M. Insulin specifically regulates expression of liver and muscle phosphofructokinase isoforms. Biomed Pharmacother 2018; 103:228-233. [PMID: 29655163 DOI: 10.1016/j.biopha.2018.04.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 03/23/2018] [Accepted: 04/05/2018] [Indexed: 01/04/2023] Open
Abstract
Phosphofructokinase (PFK) is a key regulatory enzyme of glycolysis, being considered the pacemaker of this pathway. In mammals, this enzyme exists as three different isoforms, PFKM, PFKL and PFKP, presenting different regulatory and catalytic properties. The expression of these isoforms is tissue-specific and vary according to the cell differentiation and signalization. Although it is known that the expression of the different PFK isoforms directly affects cell function, the information regarding the regulation of PFK isoforms expression is scarce. In the present work, we evaluate the role of insulin signalization on the expression of three PFK isoforms on skeletal muscle, liver, and epididymal white adipose tissue (eWAT) of mice. For this, Swiss mice were treated with streptozotocin (STZ) to disrupt pancreatic ß-cells and, thus, insulin production. Control group were treated with citrate buffer (STZ vehicle). These groups were then treated with insulin or saline twice a day for ten consecutive days when animals were euthanized and tissues used for the evaluation of PFK isoforms expression by quantitative PCR (qPCR). Our results revealed that the lack of insulin significantly impacted the expression of PFKL, presenting mild effects on PFKM and no effects on PFKP. The decrease of PFKL and PFKM mRNA levels observed on the group treated with STZ was reversed by the treatment with insulin. In conclusion, insulin, the most known regulator of glucose consumption, specifically regulates the expression of PFKL and PFKM, which impact the regulation of glycolysis in the cell.
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Affiliation(s)
- Priscila Ausina
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-903, RJ, Brazil
| | - Daniel Da Silva
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-903, RJ, Brazil
| | - David Majerowicz
- Laboratório de Alvos Moleculares (LAM), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-903, RJ, Brazil
| | - Patricia Zancan
- Laboratório de Oncobiologia Molecular (LabOMol), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-903, RJ, Brazil
| | - Mauro Sola-Penna
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-903, RJ, Brazil.
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Gallic Acid Alleviates Hypertriglyceridemia and Fat Accumulation via Modulating Glycolysis and Lipolysis Pathways in Perirenal Adipose Tissues of Rats Fed a High-Fructose Diet. Int J Mol Sci 2018; 19:ijms19010254. [PMID: 29342975 PMCID: PMC5796201 DOI: 10.3390/ijms19010254] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 01/12/2018] [Accepted: 01/13/2018] [Indexed: 11/16/2022] Open
Abstract
This study investigated the ameliorative effect of gallic acid (GA) on hypertriglyceridemia and fat accumulation in perirenal adipose tissues of high-fructose diet (HFD)-induced diabetic rats. The previous results showed that orally administered GA (30 mg/kg body weight) for four weeks significantly reduced the levels of plasma glucose and triglyceride (TG) in HFD rats. GA also markedly decreased the perirenal adipose tissues weight of HFD rats in present study (p < 0.05). Western blot assay indicated that GA restored expression of insulin signaling-related proteins, such as insulin receptor (IR), protein kinase C-zeta (PKC-ζ), and glucose transporter-4 (GLUT4) in the perirenal adipose tissues of HFD rats. Moreover, GA enhanced expression of glycolysis-related proteins, such as phosphofructokinase (PFK) and pyruvate kinase (PK), and increased the expression of lipolysis-related proteins, such as adipose triglyceride lipase (ATGL), which is involved in lipolysis in the perirenal adipose tissues of HFD rats. This study revealed that GA may alleviate hypertriglyceridemia and fat accumulation through enhancing glycolysis and lipolysis pathways in perirenal adipose tissues of HFD rats. These findings also suggest the potential of GA in preventing the progression of diabetes mellitus (DM) complications.
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15
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Mangiferin Accelerates Glycolysis and Enhances Mitochondrial Bioenergetics. Int J Mol Sci 2018; 19:ijms19010201. [PMID: 29315239 PMCID: PMC5796150 DOI: 10.3390/ijms19010201] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 12/23/2017] [Accepted: 12/27/2017] [Indexed: 01/18/2023] Open
Abstract
One of the main causes of hyperglycemia is inefficient or impaired glucose utilization by skeletal muscle, which can be exacerbated by chronic high caloric intake. Previously, we identified a natural compound, mangiferin (MGF) that improved glucose utilization in high fat diet (HFD)-induced insulin resistant mice. To further identify the molecular mechanisms of MGF action on glucose metabolism, we conducted targeted metabolomics and transcriptomics studies of glycolyic and mitochondrial bioenergetics pathways in skeletal muscle. These data revealed that MGF increased glycolytic metabolites that were further augmented as glycolysis proceeded from the early to the late steps. Consistent with an MGF-stimulation of glycolytic flux there was a concomitant increase in the expression of enzymes catalyzing glycolysis. MGF also increased important metabolites in the tricarboxylic acid (TCA) cycle, such as α-ketoglutarate and fumarate. Interestingly however, there was a reduction in succinate, a metabolite that also feeds into the electron transport chain to produce energy. MGF increased succinate clearance by enhancing the expression and activity of succinate dehydrogenase, leading to increased ATP production. At the transcriptional level, MGF induced mRNAs of mitochondrial genes and their transcriptional factors. Together, these data suggest that MGF upregulates mitochondrial oxidative capacity that likely drives the acceleration of glycolysis flux.
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16
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Cruzen SM, Baumgard LH, Gabler NK, Pearce SC, Lonergan SM. Temporal proteomic response to acute heat stress in the porcine muscle sarcoplasm1. J Anim Sci 2017. [DOI: 10.2527/jas.2017.1375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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17
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Liu L, Tang D, Zhao H, Xin X, Aisa HA. Hypoglycemic effect of the polyphenols rich extract from Rose rugosa Thunb on high fat diet and STZ induced diabetic rats. JOURNAL OF ETHNOPHARMACOLOGY 2017; 200:174-181. [PMID: 28213107 DOI: 10.1016/j.jep.2017.02.022] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 02/10/2017] [Accepted: 02/14/2017] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Rosa rugosa Thunb is a traditional Uygur medicine that has been used in the treatment of diabetes in Uygur ancient recipe for hundreds of years. However, the mechanism of Rosa rugosa Thunb activity is still unclear. This study was designed to address this issue by studying the polyphenols enriched extract (RPE) of Rosa rugosa Thunb in diabetic rats. MATERIALS AND METHODS RPE were tested in the inhibition of α-glucosidase and oxidative stress in vitro. RPE was administrated at dosages of 37.5, 75 and 150mg/kg body weight in the type 2 diabetic rats, which were made by high fat diet feeding plus a low dose of STZ injection (30mg/kg). The therapeutic effect was evaluated four weeks later. Oral glucose tolerance test (OGTT), insulin tolerance test (ITT) and insulin signal pathway (PI3K/AKT) were examined to determine insulin sensitivity. Blood glucose levels and body weight were measured weekly in the study. RESULTS In vitro, RPE exhibited an activity in the inhibition of α-glucosidase and had an excellent antioxidant activity in the liver of diabetic rats. RPE significantly decreased the fasting blood glucose, improved insulin sensitivity (HOMA-IR), OGTT, ITT and blood lipid profile. The glycogen synthesis and hexokinase activity were increased together with the improved signaling activity of insulin as indicated by p-IRS, p-IR, p-AKT, and p-GSK-3β. CONCLUSIONS The results suggest that RPE reduced blood glucose in type 2 diabetic rats by improvement of insulin sensitivity. The effect is likely achieved by inhibition of oxidative stress and α-glucosidase.
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Affiliation(s)
- Liu Liu
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dan Tang
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Haiqing Zhao
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
| | - Xuelei Xin
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China.
| | - Haji Akber Aisa
- Key Laboratory of Chemistry of Plant Resources in Arid Regions, State Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource Utilization, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China.
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18
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Coelho RG, Calaça IC, Celestrini DM, Correia-Carneiro AHP, Costa MM, Zancan P, Sola-Penna M. Hexokinase and phosphofructokinase activity and intracellular distribution correlate with aggressiveness and invasiveness of human breast carcinoma. Oncotarget 2016; 6:29375-87. [PMID: 26320188 PMCID: PMC4745733 DOI: 10.18632/oncotarget.4910] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 07/27/2015] [Indexed: 01/01/2023] Open
Abstract
Glycolytic enzymes, such as hexokinase and phosphofructokinase, have been reported to be upregulated in many cancer types. Here, we evaluated these two enzymes in 54 breast cancer samples collected from volunteers subjected to mastectomy, and the results were correlated with the prognosis markers commonly used. We found that both enzymes positively correlate with the major markers for invasiveness and aggressiveness. For invasiveness, the enzymes activities increase in parallel to the tumor size. Moreover, we found augmented activities for both enzymes when the samples were extirpated from patients presenting lymph node involvement or occurrence of metastasis. For aggressiveness, we stained the samples for the estrogen and progesterone receptors, HER-2, p53 and Ki-67. The enzyme activities positively correlated with all markers but Ki-67. Finally, we conclude that these enzymes are good markers for breast cancer prognosis.
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Affiliation(s)
- Raquel G Coelho
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil.,Instituto de Bioquímica Médica Leopoldo De Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil.,Present address: Laboratório de Fisiologia Endócrina Doris Rosenthal (LFE), Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Isadora C Calaça
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Deborah M Celestrini
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | | | - Mauricio M Costa
- Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Patricia Zancan
- Laboratório de Oncobiologia Molecular (LabOMol), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
| | - Mauro Sola-Penna
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), Departamento de Biotecnologia Farmacêutica, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
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19
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Casanova LM, Espíndola-Netto JM, Tinoco LW, Sola-Penna M, Costa SS. The Use of NMR Metabolite Profiling andin vivoHypoglycemic Assay for Comparison of Unfractionated Aqueous Leaf Extracts of TwoOcimumSpecies. Chem Biodivers 2016; 13:686-94. [DOI: 10.1002/cbdv.201500180] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Accepted: 01/05/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Livia Marques Casanova
- Laboratório de Química de Produtos Naturais Bioativos - LPN-Bio; Instituto de Pesquisas de Produtos Naturais; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
| | - Jair Machado Espíndola-Netto
- Laboratório de Enzimologia e Controle do Metabolismo - LabECoM; Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
| | - Luzineide Wanderley Tinoco
- Laboratório Multiusuário de Análises por RMN - LAMAR; Instituto de Pesquisas de Produtos Naturais; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
| | - Mauro Sola-Penna
- Laboratório de Enzimologia e Controle do Metabolismo - LabECoM; Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
| | - Sônia Soares Costa
- Laboratório de Química de Produtos Naturais Bioativos - LPN-Bio; Instituto de Pesquisas de Produtos Naturais; Universidade Federal do Rio de Janeiro; Rio de Janeiro 21941-902 RJ Brazil
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Huang DW, Chang WC, Wu JSB, Shih RW, Shen SC. Vescalagin from Pink Wax Apple [Syzygium samarangense (Blume) Merrill and Perry] Alleviates Hepatic Insulin Resistance and Ameliorates Glycemic Metabolism Abnormality in Rats Fed a High-Fructose Diet. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:1122-1129. [PMID: 26800576 DOI: 10.1021/acs.jafc.5b05558] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study investigates the ameliorative effect of vescalagin (VES) isolated from Pink wax apple fruit on hepatic insulin resistance and abnormal carbohydrate metabolism in high-fructose diet (HFD)-induced hyperglycemic rats. The results show that in HFD rats, VES significantly reduced the values of the area under the curve for glucose in an oral glucose tolerance test and the homeostasis model assessment of insulin resistance index. VES significantly enhanced the activity of hepatic antioxidant enzymes while reducing thiobarbituric acid-reactive substances in HFD rats. Western blot assay revealed that VES reduced hepatic protein expression involved in inflammation pathways while up-regulating expression of hepatic insulin signaling-related proteins. Moreover, VES up-regulated the expression of hepatic glycogen synthase and hepatic glycolysis-related proteins while down-regulating hepatic gluconeogenesis-related proteins in HFD rats. This study suggests some therapeutic potential of VES in preventing the progression of diabetes mellitus.
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Affiliation(s)
- Da-Wei Huang
- Department of Food and Beverage Management, China University of Science and Technology , No. 245, Sec. 3, Academia Road, Taipei 11581, Taiwan
| | - Wen-Chang Chang
- Graduate Institute of Food Science and Technology, National Taiwan University , P.O. Box 23-14, Taipei 10672, Taiwan
| | - James Swi-Bea Wu
- Graduate Institute of Food Science and Technology, National Taiwan University , P.O. Box 23-14, Taipei 10672, Taiwan
| | - Rui-Wen Shih
- Department of Human Development and Family Studies, National Taiwan Normal University , No. 162, Sec. 1, Heping East Road, Taipei 10610, Taiwan
| | - Szu-Chuan Shen
- Department of Human Development and Family Studies, National Taiwan Normal University , No. 162, Sec. 1, Heping East Road, Taipei 10610, Taiwan
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21
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Huang DW, Chang WC, Wu JSB, Shih RW, Shen SC. Gallic acid ameliorates hyperglycemia and improves hepatic carbohydrate metabolism in rats fed a high-fructose diet. Nutr Res 2016; 36:150-60. [DOI: 10.1016/j.nutres.2015.10.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 10/02/2015] [Accepted: 10/08/2015] [Indexed: 02/07/2023]
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Mukundwa A, Mukaratirwa S, Masola B. Effects of oleanolic acid on the insulin signaling pathway in skeletal muscle of streptozotocin-induced diabetic male Sprague-Dawley rats. J Diabetes 2016; 8:98-108. [PMID: 25564701 DOI: 10.1111/1753-0407.12260] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 10/08/2014] [Accepted: 12/19/2014] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The pant-derived triterpene oleanolic acid (OA) has been shown to have antidiabetic effects, but its action on the insulin signaling cascade has not been fully elucidated. The aim of the present study was to investigate the effects of OA on aspects of the phosphatidylinositol 3-kinase/Akt insulin signaling cascade in skeletal muscle of streptozotocin-induced type 1 diabetic male Sprague-Dawley rats. METHODS Diabetic and non-diabetic rats were treated with insulin (4 IU/kg), OA (80 mg/kg), and the combination of OA + insulin in acute 60-min and sub-chronic 14-day studies. Single and daily doses were administered in the acute and sub-chronic studies, respectively. In acute studies, phosphorylated (p-) Akt and p-glycogen synthase (GS) expression was evaluated. In sub-chronic studies, GS and glycogen phosphorylase (GP) expression and activity were evaluated, as were glycogen levels. RESULTS The findings show that OA enhances insulin-stimulated hypoglycemic effects in diabetic rats. In the acute study, OA increased levels of p-Akt and decreased levels of p-GS. In the sub-chronic study, OA increased both GS and GP activity, whereas OA + insulin increased GS and decreased GP activity. Treatment of rats with OA and OA + insulin increased GS expression in the skeletal muscle of diabetic rats and decreased GP expression. Glycogen levels were increased by OA but decreased OA + insulin treatment. CONCLUSION Oleanolic acid in synergy with insulin can enhance activation of the insulin signaling pathway. Furthermore, the present study provides evidence of OA activation of insulin signaling enzymes independent of insulin.
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Affiliation(s)
- Andrew Mukundwa
- Discipline of Biochemistry, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban, South Africa
| | - Samson Mukaratirwa
- Discipline of Biological Sciences, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban, South Africa
| | - Bubuya Masola
- Discipline of Biochemistry, School of Life Sciences, University of KwaZulu-Natal, Westville Campus, Durban, South Africa
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Zheng J, Woo SL, Hu X, Botchlett R, Chen L, Huo Y, Wu C. Metformin and metabolic diseases: a focus on hepatic aspects. Front Med 2015; 9:173-86. [PMID: 25676019 PMCID: PMC4567274 DOI: 10.1007/s11684-015-0384-0] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 10/24/2014] [Indexed: 12/25/2022]
Abstract
Metformin has been widely used as a first-line anti-diabetic medicine for the treatment of type 2 diabetes (T2D). As a drug that primarily targets the liver, metformin suppresses hepatic glucose production (HGP), serving as the main mechanism by which metformin improves hyperglycemia of T2D. Biochemically, metformin suppresses gluconeogenesis and stimulates glycolysis. Metformin also inhibits glycogenolysis, which is a pathway that critically contributes to elevated HGP. While generating beneficial effects on hyperglycemia, metformin also improves insulin resistance and corrects dyslipidemia in patients with T2D. These beneficial effects of metformin implicate a role for metformin in managing non-alcoholic fatty liver disease. As supported by the results from both human and animal studies, metformin improves hepatic steatosis and suppresses liver inflammation. Mechanistically, the beneficial effects of metformin on hepatic aspects are mediated through both adenosine monophosphate-activated protein kinase (AMPK)-dependent and AMPK-independent pathways. In addition, metformin is generally safe and may also benefit patients with other chronic liver diseases.
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Affiliation(s)
- Juan Zheng
- Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, USA
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Shih-Lung Woo
- Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, USA
| | - Xiang Hu
- Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, USA
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Rachel Botchlett
- Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, USA
| | - Lulu Chen
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yuqing Huo
- Drug Discovery Center, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Chaodong Wu
- Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77843, USA
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Al Hasawi N, Alkandari MF, Luqmani YA. Phosphofructokinase: a mediator of glycolytic flux in cancer progression. Crit Rev Oncol Hematol 2014; 92:312-21. [PMID: 24910089 DOI: 10.1016/j.critrevonc.2014.05.007] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 04/10/2014] [Accepted: 05/13/2014] [Indexed: 01/07/2023] Open
Abstract
In view of the current limitations of cancer chemotherapy, there has been resurgent interest in re-visiting glycolysis to determine whether tumors could be killed by energy deprivation rather than solely by strategies to inhibit proliferation. Cancer cells exhibit a uniquely high rate of glucose utilization, converting it into lactate whose export subsequently creates an acidic extracellular environment that is thought to promote invasion and metastasis, in preference to its complete oxidation even in the presence of adequate oxygen supply. Reductive analysis of each step of glycolysis shows that, of the three rate limiting enzymes of the pathway, isoforms of phosphofructokinase may afford the greatest opportunity as targets to deprive cancer cells from essential energy and substrates for macromolecular synthesis for proliferation while allowing normal cells to survive. Strategies discussed include restricting the substrate for this enzyme. While prospects for monotherapy with glycolytic inhibitors are poor, combination therapy may be productive.
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Affiliation(s)
- Nada Al Hasawi
- Faculty of Pharmacy, Kuwait University, PO Box 24923, Safat 13110, Kuwait.
| | - Mariam F Alkandari
- Faculty of Pharmacy, Kuwait University, PO Box 24923, Safat 13110, Kuwait.
| | - Yunus A Luqmani
- Faculty of Pharmacy, Kuwait University, PO Box 24923, Safat 13110, Kuwait.
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25
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Kristensen JM, Treebak JT, Schjerling P, Goodyear L, Wojtaszewski JFP. Two weeks of metformin treatment induces AMPK-dependent enhancement of insulin-stimulated glucose uptake in mouse soleus muscle. Am J Physiol Endocrinol Metab 2014; 306:E1099-109. [PMID: 24644243 PMCID: PMC4971810 DOI: 10.1152/ajpendo.00417.2013] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Metformin-induced activation of the 5'-AMP-activated protein kinase (AMPK) has been associated with enhanced glucose uptake in skeletal muscle, but so far no direct causality has been examined. We hypothesized that an effect of in vivo metformin treatment on glucose uptake in mouse skeletal muscles is dependent on AMPK signaling. Oral doses of metformin or saline treatment were given to muscle-specific kinase dead (KD) AMPKα2 mice and wild-type (WT) littermates either once or chronically for 2 wk. Soleus and extensor digitorum longus muscles were used for measurements of glucose transport and Western blot analyses. Chronic treatment with metformin enhanced insulin-stimulated glucose uptake in soleus muscles of WT (∼45%, P < 0.01) but not of AMPK KD mice. Insulin signaling at the level of Akt protein expression or Thr(308) and Ser(473) phosphorylation was not changed by metformin treatment. Insulin signaling at the level of Akt and TBC1D4 protein expression as well as Akt Thr(308)/Ser(473) and TBC1D4 Thr(642)/Ser(711) phosphorylation were not changed by metformin treatment. Also, protein expressions of Rab4, GLUT4, and hexokinase II were unaltered after treatment. The acute metformin treatment did not affect glucose uptake in muscle of either of the genotypes. In conclusion, we provide novel evidence for a role of AMPK in potentiating the effect of insulin on glucose uptake in soleus muscle in response to chronic metformin treatment.
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Affiliation(s)
- Jonas Møller Kristensen
- Molecular Physiology Group, August Krogh Centre, Department of Nutrition, Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jonas T Treebak
- Molecular Physiology Group, August Krogh Centre, Department of Nutrition, Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Peter Schjerling
- Institute of Sports Medicine, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark; and
| | - Laurie Goodyear
- Research Division, Joslin Diabetes Center and Department of Medicine, Harvard Medical School, Boston, Massachusetts
| | - Jørgen F P Wojtaszewski
- Molecular Physiology Group, August Krogh Centre, Department of Nutrition, Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark;
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Da Silva D, Casanova LM, Marcondes MC, Espindola-Netto JM, Paixão LP, De Melo GO, Zancan P, Sola-Penna M, Costa SS. Antidiabetic activity ofSedum dendroideum: Metabolic enzymes as putative targets for the bioactive flavonoid kaempferitrin. IUBMB Life 2014; 66:361-70. [DOI: 10.1002/iub.1270] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 04/23/2014] [Indexed: 01/08/2023]
Affiliation(s)
- Daniel Da Silva
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), BioTecFar, Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro Brazil
| | - Livia Marques Casanova
- Laboratório de Química de Produtos Naturais Bioativos (LPN-Bio), Núcleo de Pesquisa de Produtos Naturais; Universidade Federal do Rio de Janeiro; Rio de Janeiro Brazil
| | - Mariah Celestino Marcondes
- Laboratório de Oncobiologia Molecular (LabOMol), BioTecFar, Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro Brazil
| | - Jair Machado Espindola-Netto
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), BioTecFar, Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro Brazil
| | - Larissa Pereira Paixão
- Laboratório de Oncobiologia Molecular (LabOMol), BioTecFar, Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro Brazil
| | - Giany Oliveira De Melo
- Laboratório de Química de Produtos Naturais Bioativos (LPN-Bio), Núcleo de Pesquisa de Produtos Naturais; Universidade Federal do Rio de Janeiro; Rio de Janeiro Brazil
| | - Patricia Zancan
- Laboratório de Oncobiologia Molecular (LabOMol), BioTecFar, Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro Brazil
| | - Mauro Sola-Penna
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), BioTecFar, Faculdade de Farmácia; Universidade Federal do Rio de Janeiro; Rio de Janeiro Brazil
| | - Sônia Soares Costa
- Laboratório de Química de Produtos Naturais Bioativos (LPN-Bio), Núcleo de Pesquisa de Produtos Naturais; Universidade Federal do Rio de Janeiro; Rio de Janeiro Brazil
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Kim MH, Jee JH, Park S, Lee MS, Kim KW, Lee MK. Metformin enhances glucagon-like peptide 1 via cooperation between insulin and Wnt signaling. J Endocrinol 2014; 220:117-28. [PMID: 24233023 DOI: 10.1530/joe-13-0381] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
One aspect of the effects of metformin on glucagon-like peptide (GLP)-1 might be associated with the mechanism by which the cross talk between insulin and Wnt signaling enhances GLP1 secretion, due to the action of metformin as an insulin sensitizer. However, this remains completely unknown. In this study, we have investigated the mechanisms of the action of metformin on cross talk between insulin and Wnt signaling. GLP1 enhancement by meformin was determined in human NCI-H716 intestinal L-cells and hyperglycemic db/db mice treated with metformin (0.25 and 0.5 mM and/or 12.5 mg/kg body weight) for 24 h and 2 months. Metformin increased GLP1 secretion in L-cells and db/db mice. Metformin stimulated the nuclear translocation of β-catenin and TOPflash reporter activity, and gene depletion of β-catenin or enhancement of mutation of transcription factor 7-like 2 binding site offset GLP1. In addition, insulin receptor substrate 2 gene depletion blocked metformin-enhanced β-catenin translocation. These effects were preceded by an increase in glucose utilization and calcium influx, the activation of calcium-dependent protein kinase, and, in turn, the activation of insulin signaling, and the inhibition of glycogen synthase kinase 3β, a potent inhibitor of β-catenin. Furthermore, high blood glucose levels were controlled via GLP1 receptor-dependent insulinotropic pathways in db/db mice, which were evidenced by the increase in GLP1 and insulin levels at 30 min after oral glucose loading and pancreatic insulinotropic gene expression. Our findings indicate that the cooperation between Wnt and its upstream insulin signaling pathways might be a novel and important mechanism underlying the effects of metformin on GLP1 production.
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Affiliation(s)
- Mi-Hyun Kim
- Division of Endocrinology and Metabolism, Samsung Biomedical Research Institute, 50 Ilwon-dong, Gangnam-gu, Seoul 135-710, Republic of Korea Division of Endocrinology and Metabolism, Department of Medicine Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Gangnam-gu, Seoul 135-710, Republic of Korea
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Identification of chicoric acid as a hypoglycemic agent from Ocimum gratissimum leaf extract in a biomonitoring in vivo study. Fitoterapia 2014; 93:132-41. [PMID: 24418658 DOI: 10.1016/j.fitote.2013.12.024] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 12/29/2013] [Accepted: 12/31/2013] [Indexed: 11/20/2022]
Abstract
Ocimum gratissimum L. is popularly used to treat diabetes mellitus. The hypoglycemic activity of this medicinal species has been confirmed by in vivo studies. The present study conducted a chemical investigation of a leaf decoction (10% p/v) of O. gratissimum monitored by in vivo hypoglycemic activity assays. Four phenolic substances were identified: L-caftaric acid (1), L-chicoric acid (2), eugenyl-β-D-glucopyranoside (3) and vicenin-2 (4). The acute hypoglycemic activity of the O. gratissimum decoction fractions Og1-S (300 mg/kg), Og1-A (240 mg/kg) and Og1-B (80 mg/kg) was evaluated intraperitoneally in normal and streptozotocin-induced diabetic mice. They reduced glycemia by 63%, 76% and 60% (in 120 min), respectively, in the diabetic mice. Subfractions of Og1-A were also evaluated under the same conditions: Og1-AS (200 mg/kg) and Og1-AP (40 mg/kg) produced a decrease of only 37% and 39%, respectively. Among the major phenolic substances, only chicoric acid (2; 3 mg/kg) reduced significantly the glycemic levels of diabetic mice by 53%, 120 min after treatment. This is the first study describing the hypoglycemic activity of chicoric acid in an animal model of diabetes mellitus. In addition, we suggest that there may be other substances contributing to this activity. Thus, for the first time, a correlation is established between the hypoglycemic activity of O. gratissimum and its chemical composition.
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Abstract
Metformin is the first-line treatment for type 2 diabetes. Results from several clinical studies have indicated that type 2 diabetic patients treated with metformin might have a lower cancer risk. One of the primary metabolic changes observed in malignant cell transformation is an increased catabolic glucose metabolism. In this context, once it has entered the cell through organic cation transporters, metformin decreases mitochondrial respiration chain activity and ATP production that, in turn, activates AMP-activated protein kinase, which regulates energy homeostasis. In addition, metformin reduces cellular energy availability and glucose entrapment by inhibiting hexokinase-II, which catalyses the glucose phosphorylation reaction. In this review, we discuss recent findings on molecular mechanisms that sustain the anticancer effect of metformin through regulation of glucose metabolism. In particular, we have focused on the emerging action of metformin on glycolysis in normal and cancer cells, with a drug discovery perspective.
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Affiliation(s)
- Barbara Salani
- Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy
| | - Alberto Del Rio
- Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy
| | - Cecilia Marini
- Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy
| | - Gianmario Sambuceti
- Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy
| | - Renzo Cordera
- Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy
| | - Davide Maggi
- Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy Department of Internal Medicine (DIMI)University of Genova, Viale Benedetto XV/6, 16132 Genova, ItalyIRCCS Azienda Ospedaliera Universitaria San Martino - IST Istituto Nazionale per la Ricerca sul Cancro16132 Genova, ItalyDepartment of ExperimentalDiagnostic and Specialty Medicine (DIMES), Alma Mater Studiorum, University of Bologna, Bologna, ItalyCNR Institute of Organic Synthesis and Photoreactivity (ISOF)40129 Bologna, ItalyCNR Institute of Molecular Bioimaging and Physiology (IBFM)16132 Genova, ItalyDepartment of Health Science (DISSAL)University of Genova, 16132 Genova, Italy
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Ameliorating effect of eugenol on hyperglycemia by attenuating the key enzymes of glucose metabolism in streptozotocin-induced diabetic rats. Mol Cell Biochem 2013; 385:159-68. [DOI: 10.1007/s11010-013-1824-2] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 09/13/2013] [Indexed: 12/18/2022]
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Guerreiro LH, Da Silva D, Sola-Penna M, Mizurini DM, Lima LMTR. Amylin induces hypoglycemia in mice. AN ACAD BRAS CIENC 2013; 85:349-54. [PMID: 23460444 DOI: 10.1590/s0001-37652013005000011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 06/29/2012] [Indexed: 11/22/2022] Open
Abstract
Amylin is a 37-aminoacid pancreatic protein that exerts control over several metabolic events such as glycemia and lacticemia. Amylin has long been shown to induce increases in arterial plasma glucose. We decided to investigate whether amylin plays additional roles in the glucose metabolism. We evaluated glucose homeostasis using whole blood from the tail tip of fasting, conscious, unrestrained normal and streptozotocyn-induced diabetic mice following subcutaneous administration of mouse amylin. Subcutaneous injection of 1 μg mouse amylin caused a transient decrease in whole blood glucose in both normal and diabetic mice in the absence of insulin. The blood glucose levels were lowest approximately 2 hours after amylin administration, after that they gradually recovered to the levels of the control group. The hypoglycemic effect followed a dose-dependent response ranging from 0.1 to 50 µg / mouse. These results reveal the ability for amylin in the direct control of glycemia at low doses in the absence of insulin.
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Affiliation(s)
- Luiz H Guerreiro
- Universidade Federal do Rio de Janeiro, Faculdade de Farmácia, Rio de Janeiro, RJ, Brasil
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Shen SC, Chang WC, Chang CL. An extract from wax apple (Syzygium samarangense (Blume) Merrill and Perry) effects glycogenesis and glycolysis pathways in tumor necrosis factor-α-treated FL83B mouse hepatocytes. Nutrients 2013; 5:455-67. [PMID: 23389304 PMCID: PMC3635205 DOI: 10.3390/nu5020455] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 01/21/2013] [Accepted: 02/04/2013] [Indexed: 12/21/2022] Open
Abstract
FL83B mouse hepatocytes were treated with tumor necrosis factor-α (TNF-α) to induce insulin resistance to investigate the effect of a wax apple aqueous extract (WAE) in insulin-resistant mouse hepatocytes. The uptake of 2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl)amino]-2-deoxyglucose (2 NBDG), a fluorescent D-glucose derivative, was performed, and the metabolism of carbohydrates was evaluated by examining the expression of glycogenesis or glycolysis-related proteins in insulin-resistant hepatocytes. The results show that WAE significantly improves the uptake of glucose and enhances glycogen content in insulin-resistant FL83B mouse hepatocytes. The results from Western blot analysis also reveal that WAE increases the expression of glycogen synthase (GS), hexokinase (HXK), glucose-6-phosphate dehydrogenase (G6PD), phosphofructokinase (PFK) and aldolase in TNF-α treated cells, indicating that WAE may ameliorate glucose metabolism by promoting glycogen synthesis and the glycolysis pathways in insulin-resistant FL83B mouse hepatocytes.
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Affiliation(s)
- Szu-Chuan Shen
- Department of Human Development and Family Studies, National Taiwan Normal University, No. 162, Sec. 1, Heping East Road, Taipei 10610, Taiwan
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +886-2-7734-1437; Fax: +886-2-2363-09635
| | - Wen-Chang Chang
- Graduate Institute of Food Science and Technology, National Taiwan University, P.O. Box 23-14, Taipei 10672, Taiwan; E-Mails: (W.-C.C.); (C.-L.C.)
| | - Chiao-Li Chang
- Graduate Institute of Food Science and Technology, National Taiwan University, P.O. Box 23-14, Taipei 10672, Taiwan; E-Mails: (W.-C.C.); (C.-L.C.)
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Coelho WS, Sola-Penna M. Serotonin regulates 6-phosphofructo-1-kinase activity in a PLC-PKC-CaMK II- and Janus kinase-dependent signaling pathway. Mol Cell Biochem 2012; 372:211-20. [PMID: 23010892 DOI: 10.1007/s11010-012-1462-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 09/14/2012] [Indexed: 01/08/2023]
Abstract
Serotonin (5-HT) is a hormone that has been implicated in the regulation of many physiological and pathological events. One of the most intriguing properties of this hormone is its ability to up-regulate mitosis. Moreover, 5-HT stimulates glucose uptake and up-regulates PFK activity through the 5-HT(2A) receptor, resulting in the phosphorylation of a tyrosine residue of PFK and the intracellular redistribution of PFK within skeletal muscle. The present study investigated some of the signaling intermediates involved in the effects of 5-HT on 6-phosphofructo-1-kinase (PFK) regulation from skeletal muscle using kinetic assessments, immunoprecipitation, and western blotting assays. Our results demonstrate that 5-HT stimulates PFK from skeletal muscle via phospholipase C (PLC). The activation of PLC in skeletal muscle leads to the recruitment of protein kinase C (PKC) and calmodulin and the stimulation of calmodulin kinase II, which associates with PFK upon 5-HT action. Alternatively, 5-HT loses its ability to up-regulate PFK activity when Janus kinase is inhibited, suggesting that 5-HT is able to control glycolytic flux in the skeletal muscle of mice by recruiting different pathways and controlling PFK activity.
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Affiliation(s)
- Wagner Santos Coelho
- Laboratório de Enzimologia e Controle do Metabolismo (LabECoM), Departamento de Fármacos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Ilha do Fundão, Rio de Janeiro, RJ 21941-590, Brazil
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Da Silva D, Ausina P, Alencar EM, Coelho WS, Zancan P, Sola-Penna M. Metformin reverses hexokinase and phosphofructokinase downregulation and intracellular distribution in the heart of diabetic mice. IUBMB Life 2012; 64:766-74. [DOI: 10.1002/iub.1063] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 05/25/2012] [Indexed: 01/19/2023]
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35
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Abrantes JL, Alves CM, Costa J, Almeida FCL, Sola-Penna M, Fontes CFL, Souza TML. Herpes simplex type 1 activates glycolysis through engagement of the enzyme 6-phosphofructo-1-kinase (PFK-1). Biochim Biophys Acta Mol Basis Dis 2012; 1822:1198-206. [PMID: 22542512 DOI: 10.1016/j.bbadis.2012.04.011] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 04/09/2012] [Accepted: 04/12/2012] [Indexed: 01/17/2023]
Abstract
UNLABELLED Viruses such as HIV, HCV, Mayaro and HCMV affect cellular metabolic pathways, including glycolysis. Although some studies have suggested that the inhibition of glycolysis affects HSV-1 replication and that HSV-1-infected eyes have increased lactate production, the mechanisms by which HSV-1 induces glycolysis have never been investigated in detail. In this study, we observed an increase in glucose uptake, lactate efflux and ATP content in HSV-1-infected cells. HSV-1 triggered a MOI-dependent increase in the activity of phosphofructokinase-1 (PFK-1), a key rate-limiting enzyme of the glycolytic pathway. After HSV-1 infection, we observed increased PFK-1 expression, which increased PFK-1 total activity, and the phosphorylation of this enzyme at serine residues. HSV-1-induced glycolysis was associated with increased ATP content, and these events were critical for viral replication. In summary, our results suggest that HSV-1 triggers glycolysis through a different mechanism than other herpesviruses, such as HCMV. Thus, this study contributes to a better understanding of HSV-1 pathogenesis and provides insights into novel targets for antiviral therapy. HIGHLIGHTS ►HSV-1 activates glycolysis by PFK-1 activation. ►In HSV-1-infected cells PFK-1 synthesis is up-regulated and phosphorylated at serine residues. ►PFK-1 knockdown impairs HSV-1 replication. ►HSV-1-mediated glycolysis activation increases ATP content.
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Affiliation(s)
- Juliana L Abrantes
- Laboratório de Estrutura e Regulação de Proteínas e ATPases, Programa de Pós-Graduação em Química Biológica, Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, RJ, Brazil.
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Antidiabetic drug metformin alleviates endotoxin-induced fulminant liver injury in mice. Int Immunopharmacol 2012; 12:682-8. [PMID: 22330083 DOI: 10.1016/j.intimp.2012.01.015] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2011] [Revised: 01/19/2012] [Accepted: 01/31/2012] [Indexed: 02/08/2023]
Abstract
Metformin is a first-line antidiabetic drug in type 2 diabetes for its hypoglycemic activity, but recently researches also revealed the anti-inflammatory properties of metformin. In the present study, the pharmacological efficiency of metformin in lipopolysaccharide (LPS)-induced hepatic injury in D-galactosamine (D-Gal)-sensitized mice was investigated. We found that pretreatment with metformin significantly decreased serum ALT and AST levels in LPS/D-Gal-exposed mice. These were accomplished with improved histological alterations in liver sections, decreased myeloperoxidase (MPO) activity, reduced malondialdehyde (MDA) content in liver homogenates and increased survival rate of experimental animals. Metformin also markedly reduced hepatic TNF-α mRNA content and blood TNF-α level. Additional experiment showed that metformin significantly attenuated LPS/D-Gal-induced hepatic apoptosis as evidenced by decreased caspase activities in liver tissues and reduced number of TUNEL-positive cells in liver sections. Furthermore, therapeutic administration of metformin after LPS/D-Gal challenge also improved the survival rate of experimental animal. These results indicated that the hypoglycemic reagent metformin could also provide therapeutic benefits in endotoxin-induced hepatic injury, suggesting its pharmacological potential in inflammation-base disorders.
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Marcondes MC, Sola-Penna M, Torres RDSG, Zancan P. Muscle-type 6-phosphofructo-1-kinase and aldolase associate conferring catalytic advantages for both enzymes. IUBMB Life 2011; 63:435-45. [PMID: 21698747 DOI: 10.1002/iub.464] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
6-Phosphofructo-1-kinase (PFK) and aldolase are two sequential glycolytic enzymes that associate forming heterotetramers containing a dimer of each enzyme. Although free PFK dimers present a negligible activity, once associated to aldolase these dimers are as active as the fully active tetrameric conformation of the enzyme. Here we show that aldolase-associated PFK dimers are not inhibited by clotrimazole, an antifungal azole derivative proposed as an antineoplastic drug due to its inhibitory effects on PFK. In the presence of aldolase, PFK is not modulated by its allosteric activators, ADP and fructose-2,6-bisphosphate, but is still inhibited by citrate and lactate. The association between the two enzymes also results on the twofold stimulation of aldolase maximal velocity and affinity for its substrate. These results suggest that the association between PFK and aldolase confers catalytic advantage for both enzymes and may contribute to the channeling of the glycolytic metabolism.
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Affiliation(s)
- Mariah Celestino Marcondes
- Laboratório de Oncobiologia Molecular (LabOMol), Departamento de Fármacos, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
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Coelho RG, Calaça IDC, Celestrini DDM, Correia AH, Costa MASM, Sola-Penna M. Clotrimazole disrupts glycolysis in human breast cancer without affecting non-tumoral tissues. Mol Genet Metab 2011; 103:394-8. [PMID: 21531601 DOI: 10.1016/j.ymgme.2011.04.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 04/11/2011] [Accepted: 04/11/2011] [Indexed: 12/26/2022]
Abstract
Human breast cancer tissues, as well as normal tissues from the same patients, were treated with clotrimazole (CTZ) and have their capacities for glucose consumption and lactate production evaluated. This treatment strongly decreased the lactate production rate by tumor tissues (85% inhibition) without affecting the other measurements made, i.e. lactate production by control tissues or glucose consumption by both, control and tumor tissues. This result directly correlates with the inhibition promoted by CTZ on the activity of the major regulatory glycolytic enzyme 6-phosphofructo-1-kinase (PFK) that was observed in tumor tissues (84% inhibition) but not in control tissues. Fractionation of the tissues revealed that this inhibition does not occur in the soluble fraction of the enzyme, but is exclusive of a particulate fraction. It has been previously shown that the particulate fraction of PFK activity in tumors is associated to actin filaments (f-actin). Thus, we investigated whether CTZ would affect the association between PFK and f-actin and we found that the drug directly induces the dissociation of the two proteins in the same extent that it inhibits lactate production, total PFK activity and the particulate PFK activity. We concluded that CTZ disrupts glycolysis on human breast tumor tissues, inhibiting PFK activity by dissociating the enzyme from f-actin.
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Affiliation(s)
- Raquel Guimarães Coelho
- Laboratório de Enzomologia e Controle do Metabolismo, Departamento de Fármacos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-590, Brazil
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Sola-Penna M, Da Silva D, Coelho WS, Marinho-Carvalho MM, Zancan P. Regulation of mammalian muscle type 6-phosphofructo-1-kinase and its implication for the control of the metabolism. IUBMB Life 2011; 62:791-6. [PMID: 21117169 DOI: 10.1002/iub.393] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Phosphofructokinase (PFK) is a major regulatory glycolytic enzyme and is considered to be the pacemaker of glycolysis. This enzyme presents a puzzling regulatory mechanism that is modulated by a large variety of metabolites, drugs, and intracellular proteins. To date, the mammalian enzyme structure has not yet been resolved. However, it is known that PFK undergoes an intricate oligomerization process, shifting among monomers, dimers, tetramers, and more complex oligomeric structures. The equilibrium between PFK dimers and tetramers is directly correlated with the enzyme regulation, because the dimer exhibits very low catalytic activity, whereas the tetramer is fully active. Several PFK ligands modulate the enzyme, favoring the formation of its dimers or tetramers. The present review integrates recent findings regarding the regulatory aspects of muscle type PFK and discusses their relation to the control of metabolism.
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Affiliation(s)
- Mauro Sola-Penna
- Laboratorio de Enzimologia e Controle do Metabolismo (LabECoM) and Laboratório de Oncobiologia Molecular (LabOMol), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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Grechi J, Marinho-Carvalho M, Zancan P, Cinelli LP, Gomes AMO, Rodrigues ML, Nimrichter L, Sola-Penna M. Glucuronoxylomannan from Cryptococcus neoformans down-regulates the enzyme 6-phosphofructo-1-kinase of macrophages. J Biol Chem 2011; 286:14820-9. [PMID: 21388964 DOI: 10.1074/jbc.m110.177030] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The encapsulated yeast Cryptococcus neoformans is the causative agent of cryptococosis, an opportunistic life-threatening infection. C. neoformans is coated by a polysaccharide capsule mainly composed of glucuronoxylomannan (GXM). GXM is considered a key virulence factor of this pathogen. The present work aimed at evaluating the effects of GXM on the key glycolytic enzyme, 6-phosphofructo-1-kinase (PFK). GXM inhibited PFK activity in cultured murine macrophages in both dose- and time-dependent manners, which occurred in parallel to cell viability decrease. The polysaccharide also inhibited purified PFK, promoting a decrease on the enzyme affinity for its substrates. In macrophages GXM and PFK partially co-localized, suggesting that internalized polysaccharide directly may interact with this enzyme. The mechanism of PFK inhibition involved dissociation of tetramers into weakly active dimers, as revealed by fluorescence spectroscopy. Allosteric modulators of the enzyme able to stabilize its tetrameric conformation attenuated the inhibition promoted by GXM. Altogether, our results suggest that the mechanism of GXM-induced cell death involves the inhibition of the glycolytic flux.
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Affiliation(s)
- Juliana Grechi
- Laboratório de Enzimologia e Controle do Metabolismo, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-590, Brazil
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Microcapsules of alginate/chitosan containing magnetic nanoparticles for controlled release of insulin. Colloids Surf B Biointerfaces 2010; 81:206-11. [DOI: 10.1016/j.colsurfb.2010.07.008] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 05/11/2010] [Accepted: 07/06/2010] [Indexed: 11/23/2022]
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