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Shi W, Li H, Fu Y, Tang X, Yu J, Wang X. Preparation of functional oils rich in phytosterol esters and diacylglycerols by enzymatic transesterification. Food Chem 2024; 448:139100. [PMID: 38552457 DOI: 10.1016/j.foodchem.2024.139100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 02/29/2024] [Accepted: 03/19/2024] [Indexed: 04/24/2024]
Abstract
Phytosterol esters (PEs) and diacylglycerols (DAGs) have various health benefits in humans. In this study, PEs and DAGs were synthesized by lipase-catalyzed transesterification between a natural oil and phytosterols. First, commercial lipases were screened for transesterification and were further verified using multiple-ligand molecular docking. AYS "Amano" (a lipase from Candida rugosa) was found to be the optimum lipase. Subsequently, the enzymatic transesterification conditions were optimized. The optimized conditions were determined to be a 1:2 M ratio of phytosterols to oil, 100 mmol/L phytosterols, and 9 % AYS "Amano", and 50 °C for 24 h in 20 mL n-hexane. Under these conditions, over 70 % of phytosterols were converted to PEs. In this study, an efficient enzymatic process was developed to produce value-added functional oils rich in PEs and DAGs, with PEs content ≥ 31.6 %, DAGs content ≥ 11.2 %, acid value ≤ 0.91 mg KOH/g, and peroxide value ≤ 2.38 mmol/kg.
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Affiliation(s)
- Wangxu Shi
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, National Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, PR China
| | - Houyue Li
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, National Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, PR China
| | - Yijie Fu
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, National Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, PR China
| | - Xiao Tang
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, National Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, PR China
| | - Junwen Yu
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, National Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, PR China
| | - Xiaosan Wang
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, National Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu 214122, PR China; Ministerial and Provincial Co-Innovation Centre for Endemic Crops Production with High-quality and Effciency in Loess Plateau, Shanxi Agricultural University, Taigu, Taiyuan, Shanxi 030801, PR China.
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2
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Finco GF, da Silva EA, Palú F, Klen MRF, Fiametti KG, Wancura JHC, Oliveira JV. Kinetic modeling and optimization of the mono- and diglycerides synthesis mediated by the lipase Lipozyme® TL 100 L immobilized on clayey support. Bioprocess Biosyst Eng 2024; 47:697-712. [PMID: 38536484 DOI: 10.1007/s00449-024-02999-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 03/12/2024] [Indexed: 05/15/2024]
Abstract
Mono- and diglycerides play a crucial role in the food industry as multifunctional food additives and emulsifiers. Their importance stems from their unique properties, which allow them to improve the quality, texture, and stability of various food products. Here, results of the kinetic modeling of the mono- and diglycerides synthesis mediated by the lipase Lipozyme® TL 100 L immobilized on the clayey support Spectrogel® type C are reported. The support was characterized by TEM, SEM, and FTIR. Firstly, the influence of pH and lipase load on the immobilization process was analyzed, resulting in an enzymatic activity of 93.2 ± 0.7 U g-1 under optimized conditions (170.9 U g-1 of lipase and pH of 7.1). Afterward, the effects of reaction temperature and concentration of immobilized biocatalyst in the feedstock conversion were evaluated. At optimized parameters, a triglycerides conversion of 97% was obtained at 36.5 °C, 7.9 vol.% of enzyme, a glycerol to feedstock molar ratio of 2:1, and 2 h. The optimized conditions were used to determine the kinetic constants of the elementary reactions involved in the glycerolysis, where a fit superior to 0.99 was achieved between experimental values and predicted data.
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Affiliation(s)
- George F Finco
- Department of Chemical Engineering, Western State University of Paraná, Toledo, PR, Brazil
| | - Edson A da Silva
- Department of Chemical Engineering, Western State University of Paraná, Toledo, PR, Brazil
| | - Fernando Palú
- Department of Chemical Engineering, Western State University of Paraná, Toledo, PR, Brazil
| | - Márcia R F Klen
- Department of Chemical Engineering, Western State University of Paraná, Toledo, PR, Brazil
| | - Karina G Fiametti
- Department of Bioprocess and Biotechnology Engineering, Federal Technological University of Paraná, Toledo, PR, Brazil
| | - João H C Wancura
- Laboratory of Biomass and Biofuels (L2B), Federal University of Santa Maria, Santa Maria, RS, 97105-900, Brazil.
| | - J Vladimir Oliveira
- Department of Chemical and Food Engineering, Federal University of Santa Catarina, Florianópolis, SC, Brazil
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3
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Li Y, Zhao S, Xia X, Liu Q, Chen Q, Wang H, Kong B. Insights into the emulsifying effect and oxidation stability of myofibrillar protein- diacylglycerol emulsions containing catechin at different ionic strengths. Food Res Int 2024; 181:114144. [PMID: 38448104 DOI: 10.1016/j.foodres.2024.114144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/06/2024] [Accepted: 02/17/2024] [Indexed: 03/08/2024]
Abstract
The purpose of this study was to investigate the effects of different ionic strengths on the emulsifying and oxidation stabilities of myofibrillar protein-diacylglycerol emulsions containing catechin (MP-DAG-C), in which lard, unpurified glycerolytic lard (UGL), and purified glycerolytic lard (PGL) were used as oil phases in this study, respectively. Results revealed that emulsifying ability was significantly improved by UGL and PGL (P < 0.05). Meanwhile, the emulsifying activity and stability, absolute ξ-potential value, shear viscosity, and dynamic rheological characteristic of emulsions increased with the increase of ionic strength (P < 0.05) remarkablely, which reached the maximum value at 0.6-M sodium chloride (NaCl). The droplets of emulsions at 0.6-M ionic strength were smallest and distributed most uniformly compared to other NaCl conditions. The formation of thiobarbituric acid substances and carbonyls increased, and the total sulfydryl contents decreased as the extension of storage days (P < 0.05). However, the oxidation stability of MP-DAG-C emulsions was insignificantly decreased by ionic strengths (P > 0.05). The above results showed that MP-DAG-C emulsions could keep excellent emulsifying effects and oxidation stability under high ionic strengths. This study provides data support for the application of MP-DAG-C emulsions in emulsified meat products, which is benefit for promoting the development of high-quality emulsified meat products.
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Affiliation(s)
- Yuexin Li
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Siqi Zhao
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Xiufang Xia
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qian Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qian Chen
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Hui Wang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Baohua Kong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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Li Y, Zhao Y, Sun F, Chen Q, Liu Q, Wang H, Kong B. Investigating the effect of catechin on the emulsification and oxidation stability of myofibrillar protein- diacylglycerol emulsions. Meat Sci 2024; 210:109434. [PMID: 38244289 DOI: 10.1016/j.meatsci.2024.109434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 01/09/2024] [Accepted: 01/14/2024] [Indexed: 01/22/2024]
Abstract
The effects of catechin on the emulsification and oxidation stability of myofibrillar protein-diacylglycerol (MP-DAG) emulsions were investigated. Lard samples, namely, lard, unpurified glycerolytic lard (UGL), and purified glycerolytic lard (PGL), were used as oil phases. The emulsifying effects of UGL- and PGL-based emulsions were superior to those of lard-based emulsions (P < 0.05). The emulsifying properties of MP-DAG emulsions increased initially and then decreased with a rise in the catechin concentration, with 20-μmol/g catechin exhibiting optimal emulsification activity and stability (P < 0.05). The droplets were tinier and evenly distributed, and the absolute ξ-potential values and rheological characteristics reached their maximum at a catechin concentration of 20 μmol/g. The formation of thiobarbituric acid-reactive substances and carbonyls declined significantly with the growth of catechin levels (P < 0.05), which confirmed that the oxidation of MPs and lipids was reduced efficiently by catechin. This study provides an idea for improving the emulsification and oxidation stability of MP-DAG emulsions, which offers a theoretical basis for the application of MP-DAG emulsions in meat products.
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Affiliation(s)
- Yuexin Li
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Yubo Zhao
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Fangda Sun
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qian Chen
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Qian Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China
| | - Hui Wang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
| | - Baohua Kong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
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Elibol E, Akdevelioğlu Y, Yılmaz C, Narlı B, Şen S, Take Kaplanoğlu G, Seymen CM. Acyl ghrelin, desacyl ghrelin and their ratio affect hepatic steatosis via PPARγ signaling pathway. Arab J Gastroenterol 2024:S1687-1979(23)00117-X. [PMID: 38383264 DOI: 10.1016/j.ajg.2023.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 09/11/2023] [Accepted: 12/30/2023] [Indexed: 02/23/2024]
Abstract
BACKGROUND AND STUDY AIMS Ghrelin is an appetite hormone-containing 28-amino acid and has 4 different forms in the body. Ghrelin forms have different physiological functions in the body. This study aims to analyze the effect of acyl and desacyl ghrelin hormone on hepatic steatosis and biochemical findings in 36 male Wistar rats. MATERIALS AND METHODS Rats were split into 6 equal groups, consisting of control, acyl ghrelin, desacyl ghrelin, acyl/desacyl 3:1, acyl/desacyl 1:1, and acyl/desacyl 1:3 groups, and administered placebo or 200 ng/kg hormone subcutaneous twice a day for 14 days. Oral Glucose Tolerance Test (OGTT) was performed on Day 15, Insulin Tolerance Test (ITT) on Day 16, and scarification procedure on Day 17. Certain biochemical data and liver diacylglycerol (DAG), glycogen, protein kinase C and PPAR-γ levels were detected in the blood. Histological analyses were also conducted on the liver tissues. RESULTS The highest plasma total cholesterol and VLDL-K levels were found in the acyl/desacyl 1:3 group, and lower insulin, and HOMA-IR levels were found in groups where acyl and desacyl were administered together (p < 0.05). PPAR-γ gene expression level increased in acyl ghrelin and acyl/desacyl 1:3 groups compared to the control group. Protein kinase C gene expression was highest in the acyl/desacyl 1:3 group. The most severe degenerative findings compliant with steatosis in the liver were observed in the acyl ghrelin group (p < 0.05). CONCLUSION It was determined that administering rats acyl alone and acyl/desacyl by 1:3 caused the highest PPAR-γ gene expression, serum total cholesterol, HDL-K, and VLDL-K levels in the body. Besides, it is shown that desacyl ghrelin effectively regulates the blood glucose level when administered alone.
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Affiliation(s)
- Emine Elibol
- Departments of Nutrition and Dietetic, Ankara Yıldırım Beyazıt University, Dumlupınar Mahallesi, 06760 Çubuk, Ankara, Turkey.
| | - Yasemin Akdevelioğlu
- Departments of Nutrition and Dietetic, Gazi University, Emek mah. Bişkek Cad. 6. Cad. No:2 06490 Çankaya, Ankara, Turkey.
| | - Canan Yılmaz
- Departments of Medical Biochemistry, Gazi University, Faculty of Medicine, 06500 Beşevler, Ankara, Turkey.
| | - Belkıs Narlı
- Departments of Medical Biochemistry, Gazi University, Faculty of Medicine, 06500 Beşevler, Ankara, Turkey.
| | - Serkan Şen
- Departments of Medical Biochemistry, Afyonkarahisar Health Sciences University, Ali Çetinkaya Kampüsü Afyon- İzmir Karayolu 5.km, Afyonkarahisar, Turkey.
| | - Gülnur Take Kaplanoğlu
- Departments of Histology and Embryology, Gazi University Faculty of Medicine, 06500 Beşevler, Ankara, Turkey.
| | - Cemile Merve Seymen
- Departments of Histology and Embryology, Gazi University Faculty of Medicine, 06500 Beşevler, Ankara, Turkey.
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6
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Lv Y, Zhao H, Xu Y, Yi S, Li X, Li J. Diacylglycerol emulsion with different droplet size improves the gelation properties of Nemipterus virgatus myofibrillar protein. Food Chem 2024; 434:137322. [PMID: 37713759 DOI: 10.1016/j.foodchem.2023.137322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/26/2023] [Accepted: 08/28/2023] [Indexed: 09/17/2023]
Abstract
Effects of diacylglycerol (DAG) emulsions with different particle sizes on gel properties, microstructures and chemical forces of myofibrillar protein (MP) gels were investigated. DAG emulsions addition significantly improved the whiteness of MP gels. With the decrease of emulsion droplet size, G', G" and immovable water content of MP gels gradually increased, and cooking loss decreased, in which, emulsion prepared under 200 W reduced the cooking loss to the minimum value of 2.57 %. Furthermore, the gel strength and texture properties of MP gels were enhanced as the decreasing emulsion droplet size, and significant improvement (P < 0.05) appeared in gel strength and hardness when ultrasonic power reached 200 W, and then texture indexes tended to be stable as power continued to increase. Reducing the emulsion particle size facilitated the uniform distribution of DAG in the gel network and enhanced the chemical forces of composite gel, forming the more compact network structure.
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Affiliation(s)
- Yanan Lv
- College of Food Science and Engineering, Institute of Ocean Research, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
| | - Honglei Zhao
- College of Food Science and Engineering, Institute of Ocean Research, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
| | - Yongxia Xu
- College of Food Science and Engineering, Institute of Ocean Research, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China.
| | - Shumin Yi
- College of Food Science and Engineering, Institute of Ocean Research, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
| | - Xuepeng Li
- College of Food Science and Engineering, Institute of Ocean Research, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
| | - Jianrong Li
- College of Food Science and Engineering, Institute of Ocean Research, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China.
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7
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Ke W, Lee YY, Cheng J, Tan CP, Lai OM, Li A, Wang Y, Zhang Z. Physical, textural and crystallization properties of ground nut oil-based diacylglycerols in W/O margarine system. Food Chem 2024; 433:137374. [PMID: 37683471 DOI: 10.1016/j.foodchem.2023.137374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/10/2023]
Abstract
Enzymatic glycerolysis produced ground nut oil-based diacylglycerols (GNO-DAG) with a purity of 43.28 ± 0.89% (GNO-DAG40). GNO-DAG80 (with a DAG purity of 87.33 ± 0.61%) was obtained after purification using molecular distillation. Traditional palm oil was mixed with the "liquid" DAG as margarine base oils. Subsequent evaluations of palm oil-DAG-based fats (PO-GNO DAG) as a margarine replacement in a W/O model system showed that the material was an ideal functional base oil with improved aeration properties and plasticity during application. The binary system physical, textural and crystallization property were determined, and the compatibility of the binary mixed system was analyzed by constructing a phase diagrams. The PO-GNO DAG showed decent compatibility between the two phases and had better texture and rheological properties. In addition, PO-GNO DAG40 showed better apparent viscosity and aeration characteristics than PO-GNO DAG80, with potential application in the food specialty fats industry.
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Affiliation(s)
- Wanting Ke
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, China
| | - Yee-Ying Lee
- School of Science, Monash University Malaysia, Bandar Sunway 47500, Selangor, Malaysia
| | - Jianqiang Cheng
- Guangdong Sumbillion Food for Special Medical Purposes Co., Ltd, China
| | - Chin-Ping Tan
- Department of Food Technology, Faculty of Food Science and Technology, University Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia
| | - Oi-Ming Lai
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, University Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia
| | - Aijun Li
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, China
| | - Yong Wang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, China
| | - Zhen Zhang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, China.
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8
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Yao S, Kim SC, Li J, Tang S, Wang X. Phosphatidic acid signaling and function in nuclei. Prog Lipid Res 2024; 93:101267. [PMID: 38154743 PMCID: PMC10843600 DOI: 10.1016/j.plipres.2023.101267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 12/30/2023]
Abstract
Membrane lipidomes are dynamic and their changes generate lipid mediators affecting various biological processes. Phosphatidic acid (PA) has emerged as an important class of lipid mediators involved in a wide range of cellular and physiological responses in plants, animals, and microbes. The regulatory functions of PA have been studied primarily outside the nuclei, but an increasing number of recent studies indicates that some of the PA effects result from its action in nuclei. PA levels in nuclei are dynamic in response to stimuli. Changes in nuclear PA levels can result from activities of enzymes associated with nuclei and/or from movements of PA generated extranuclearly. PA has also been found to interact with proteins involved in nuclear functions, such as transcription factors and proteins undergoing nuclear translocation in response to stimuli. The nuclear action of PA affects various aspects of plant growth, development, and response to stress and environmental changes.
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Affiliation(s)
- Shuaibing Yao
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Sang-Chul Kim
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Jianwu Li
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Shan Tang
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Xuemin Wang
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA.
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Soleimanian Y, Ghazani SM, Marangoni AG. Enzymatic glycerolysis for the conversion of plant oils into animal fat mimetics. Food Res Int 2023; 174:113651. [PMID: 37986489 DOI: 10.1016/j.foodres.2023.113651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/25/2023] [Accepted: 10/30/2023] [Indexed: 11/22/2023]
Abstract
Substituting animal-based fats with plant-based fats of similar stability and functionality has always posed a significant challenge for the food industry. Enzymatic glycerolysis products are systems formed by converting native triacylglycerols in liquid oils into monoacylglycerols and diacylglycerols, mainly studied in the last few years for their unique structural ability. This study aims to modify and scale up the glycerolysis process of different plant oils, e.g., shea olein, palm olein, tigernut, peanut, cottonseed, and rice bran oils, with the goal of producing animal fat mimetics. The reactions were conducted at 65 °C, with a plant oil:glycerol molar ratio of 1:1, and without the addition of water, using a lab-scale reactor to convert up to 2 kg of oil into solid fat. Product characteristics were comparable at both laboratory and pilot plant scales, supporting the commercial viability of the process. Oil systems containing higher levels of both saturated and monounsaturated fatty acids, such as shea olein and palm olein, displayed higher solid fat content at elevated temperatures and broader melting profiles with significantly higher melting points. Comparison of the thermal softening behavior and mechanical properties of these systems with those of pork, beef, and lamb fat showed their high potential to replace adipose fat in the new generation of plant-based meat analogs.
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Affiliation(s)
- Yasamin Soleimanian
- Department of Food Science, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Saeed M Ghazani
- Department of Food Science, University of Guelph, Guelph, ON N1G 2W1, Canada
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10
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Liu N, Lin P, Zhang K, Li D, Yang D, Katsuyoshi N, Zhao M, Yao X. Konjac glucomannan promoted fabrication of diacylglycerol oil-based oleogels through emulsion-templated approach: Comparison with triacylglycerol oleogels. Int J Biol Macromol 2023; 251:126420. [PMID: 37598830 DOI: 10.1016/j.ijbiomac.2023.126420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 08/07/2023] [Accepted: 08/17/2023] [Indexed: 08/22/2023]
Abstract
Konjac glucomannan (KGM) combined with hydroxypropyl methyl cellulose was used to fabricate diacylglycerol oleogels (DGOs) through the emulsion-templated method, and compared with triacylglycerol oleogels (TGOs). The appearance and microstructure results showed that stable emulsions and oleogels could be formed in the presence of 0.2-0.6 wt% KGM. Higher KGM concentrations resulted in a stronger gel structure in oleogels, whose thixotropic recovery percentages were 50.45-75.20 %. From LF-NMR determination, the higher concentration of KGM presented earlier transverse relaxation (T2) time, and the T2 parameters of DGOs were higher than that of TGOs. Texture and oil loss analysis indicated that the mechanical strength and oil holding ability of DGOs were slightly lower than those of TGOs. This study demonstrated the advantages of biopolymers as thickening agents for obtaining stable emulsion and oleogels. The specific characteristics of DGOs distinguished from TGOs should be attributed to their different properties (unsaturation, viscosity, polarity, etc.) between the liquid oils.
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Affiliation(s)
- Ning Liu
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Ping Lin
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Kun Zhang
- Ferguson (Wuhan) Biotechnology Co., Ltd., Wuhan 430056, China
| | - Dan Li
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Dan Yang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Nishinari Katsuyoshi
- Glyn O. Phillips Hydrocolloid Research Centre, School of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, China
| | - Mouming Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xiaolin Yao
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
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11
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Xu Q, Wang W, Sun-Waterhouse D, Yan M, Zou Q, Liu X, Lan D, Wang Y. Exploring the fates and molecular changes of different diacylglycerol-rich lipids during in vitro digestion. Food Chem 2023; 416:135677. [PMID: 36898341 DOI: 10.1016/j.foodchem.2023.135677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 02/08/2023] [Accepted: 02/09/2023] [Indexed: 02/24/2023]
Abstract
This study aimed to support the pursuit of healthy oils and investigate the relationships between lipid compositions and digestion fates of diacylglycerol (DAG)-rich lipids using an in vitro digestion model. Soybean-, olive-, rapeseed-, camellia-, and linseed-based DAG-rich lipids (termed SD, OD, RD, CD, and LD, respectively) were selected. These lipids exhibited identical lipolysis degrees (92.20-94.36 %) and digestion rates (0.0403-0.0466 s-1). The lipid structure (DAG or triacylglycerol) was a more important factor affecting the lipolysis degree than other indices (glycerolipid composition and fatty acid composition). For RD, CD and LD with similar fatty acid compositions, the same fatty acid had different release levels, probably due to their different glycerolipid compositions (causing different distributions of the fatty acid in UU-DAG, USa-DAG and SaSa-DAG; U: unsaturated fatty acids, Sa: saturated fatty acids). This study provides insights into the digestion behaviors of different DAG-rich lipids and supports their food or pharmaceutical applications.
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Affiliation(s)
- Qingqing Xu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Weifei Wang
- Sericultural and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510610, China
| | - Dongxiao Sun-Waterhouse
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Menglei Yan
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Qian Zou
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xuan Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Dongming Lan
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Yonghua Wang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Youmei Institute of Inteligent Bio-manufacturing Co., Ltd, Foshan, Guangdong 528200, China.
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12
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Li Z, Ying Lee Y, Wang Y, Qiu C. Interfacial behavior, gelation and foaming properties of diacylglycerols with different acyl chain lengths and isomer ratios. Food Chem 2023; 427:136696. [PMID: 37392626 DOI: 10.1016/j.foodchem.2023.136696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 07/03/2023]
Abstract
Diacylglycerols (DAG) of varying chain lengths were synthesized and the acyl migrated samples with different 1,3-DAG/1,2-DAG ratios were obtained. The crystallization profile and surface adsorption differed depending on DAG structure. C12 and C14 DAGs formed small platelet- and needle-like crystals at the oil-air interface which can better reduce surface tension and pack in an ordered lamellar structure in oil. The acyl migrated DAGs with higher ratios of 1,2-DAG showed reduced crystal size and lower oil-air interfacial activity. C14 and C12 DAG oleogels exhibited higher elasticity and whipping ability with crystal shells surrounding bubbles, whereas C16 and C18 DAG oleogels had low elasticity and limited whipping ability due to the formation of aggregated needle-like crystals and loose gel network. Thus, acyl chain length dramatically influences the gelation and foaming behaviors of DAGs whereas the isomers exert little influence. This study provides basis for applying DAG of different structures in food products.
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Affiliation(s)
- Ziwei Li
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, China; National R&D Center for Freshwater Fish Processing, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Yee Ying Lee
- School of Science, Monash University Malaysia, 47500 Bandar Sunway, Selangor, Malaysia
| | - Yong Wang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, China.
| | - Chaoying Qiu
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou, Guangdong 510632, China.
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13
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Li W, Faisal S, Guo X, Li S, Shi A, Jiao B, Wang Q. The preparation of Diacylglycerol-rich soybean oil by acetylated modification of arachin nanoparticles for W/O Pickering emulsion system. Food Chem 2023; 426:136615. [PMID: 37331136 DOI: 10.1016/j.foodchem.2023.136615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 04/18/2023] [Accepted: 06/10/2023] [Indexed: 06/20/2023]
Abstract
Pickering emulsion catalytic system (PEC) stabilized by nanoparticles is an efficient catalytic platform. Herein, a high-performance PEC was constructed by acetylated modification of arachin nanoparticles (AAPs). The results showed the pI of arachin was decreased from pH 5.5 to pH 3.5. The surface hydrophobicity index was significantly increased (from 56.28 ± 4.23 to 120.77 ± 0.79) after acetylated modification. The three-phase contact angle of AAPs was 91.20 ± 0.98°. AAPs were used as lipase immobilization carriers to increase the activity of free lipase fabricating lipase-AAPs. The immobilization efficiency and activity of lipase-AAPs were 12.95 ± 0.03% and 1.74 ± 0.07 U/mg, respectively. Enzymatic reaction kinetics showed that Vm of lipase-AAPs was twice of free lipase. Km was 1/5 of free lipase. The catalytic efficiency of PEC to prepare DAG was 2.36 times of biphasic catalytic system (BCS). This work provided a promising way to promote the efficiency of DAG preparation.
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Affiliation(s)
- Wei Li
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, China
| | - Shah Faisal
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, China
| | - Xin Guo
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, China
| | - Sisheng Li
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, China
| | - Aimin Shi
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, China
| | - Bo Jiao
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, China.
| | - Qiang Wang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture, P.O. Box 5109, Beijing 100193, China.
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14
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Diao X, Sun W, Jia R, Wang Y, Liu D, Guan H. Preparation and characterization of diacylglycerol via ultrasound-assisted enzyme-catalyzed transesterification of lard with glycerol monolaurate. Ultrason Sonochem 2023; 95:106354. [PMID: 36898248 PMCID: PMC10020118 DOI: 10.1016/j.ultsonch.2023.106354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/14/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
The study aimed to evaluate the effect of ultrasonic pretreatment on the transesterification of lard with glycerol monolaurate (GML) using Lipozyme TL IM to synthesize diacylglycerol (DAG), and the physicochemical properties of lard, GML, ultrasonic-treated diacylglycerol (named U-DAG), purified ultrasonic-treated diacylglycerol obtained by molecular distillation (named P-U-DAG), and without ultrasonic-treated diacylglycerol (named N-U-DAG) were analyzed. The optimized ultrasonic pretreatment conditions were: lard to GML mole ratio 3:1, enzyme dosage 6 %, ultrasonic temperature 80 °C, time 9 min, power 315 W. After ultrasonic pretreatment, the mixtures reacted for 4 h in a water bath at 60 °C, the content of DAG reached 40.59 %. No significant variations were observed between U-DAG and N-U-DAG in fatty acids compositions and iodine value, while P-U-DAG had lower unsaturated fatty acids than U-DAG. Differential scanning calorimetry analysis showed that the melting and crystallization properties of DAGs prepared by ultrasonic pretreatment significantly differed from lard. FTIR spectra noted transesterification reaction from lard and GML with and without ultrasonic pretreatment would not change the structure of lard. However, thermogravimetric analysis proved that N-U-DAG, U-DAG, and P-U-DAG had lower oxidation stability than lard. The higher the content of DAG, the faster the oxidation speed.
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Affiliation(s)
- Xiaoqin Diao
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China
| | - Weiting Sun
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China
| | - Ruixin Jia
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China
| | - Ying Wang
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China
| | - Dengyong Liu
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China.
| | - Haining Guan
- College of Food Science and Technology, Bohai University, Jinzhou, Liaoning 121013, China.
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15
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Foo S, Cazenave-Gassiot A, Wenk MR, Oliferenko S. Diacylglycerol at the inner nuclear membrane fuels nuclear envelope expansion in closed mitosis. J Cell Sci 2023; 136:286881. [PMID: 36695178 DOI: 10.1242/jcs.260568] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 12/22/2022] [Indexed: 01/26/2023] Open
Abstract
Nuclear envelope (NE) expansion must be controlled to maintain nuclear shape and function. The nuclear membrane expands massively during closed mitosis, enabling chromosome segregation within an intact NE. Phosphatidic acid (PA) and diacylglycerol (DG) can both serve as biosynthetic precursors for membrane lipid synthesis. How they are regulated in time and space and what the implications are of changes in their flux for mitotic fidelity are largely unknown. Using genetically encoded PA and DG probes, we show that DG is depleted from the inner nuclear membrane during mitosis in the fission yeast Schizosaccharomyces pombe, but PA does not accumulate, indicating that it is rerouted to membrane synthesis. We demonstrate that DG-to-PA conversion catalyzed by the diacylglycerol kinase Dgk1 (also known as Ptp4) and direct glycerophospholipid synthesis from DG by diacylglycerol cholinephosphotransferase/ethanolaminephosphotransferase Ept1 reinforce NE expansion. We conclude that DG consumption through both the de novo pathway and the Kennedy pathway fuels a spike in glycerophospholipid biosynthesis, controlling NE expansion and, ultimately, mitotic fidelity.
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Affiliation(s)
- Sherman Foo
- The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.,Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, King's College London, London SE1 1UL, UK
| | - Amaury Cazenave-Gassiot
- Singapore Lipidomics Incubator, Life Sciences Institute and Precision Medicine Translational Research Program, Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, MD7, 8 Medical Drive, 117596 Singapore
| | - Markus R Wenk
- Singapore Lipidomics Incubator, Life Sciences Institute and Precision Medicine Translational Research Program, Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, MD7, 8 Medical Drive, 117596 Singapore
| | - Snezhana Oliferenko
- The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.,Randall Centre for Cell and Molecular Biophysics, School of Basic and Medical Biosciences, King's College London, London SE1 1UL, UK
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16
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Dietrich A. Is Zn 2+ the new Ca 2+ for TRPC6 channels in the myocardium? Cell Calcium 2023; 109:102674. [PMID: 36450202 DOI: 10.1016/j.ceca.2022.102674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 11/19/2022] [Indexed: 11/23/2022]
Abstract
Transient Receptor Potential (TRP) channels are nonselective cation channels, which are mainly permeable to Ca2+ and Na+ but many of them are also permeable to Zn2+. In a new elegant study, a Zn2+-dependent pathway involving the TRP member TRPC6 and α1- as well as β-adrenoceptors (AR) was dissected in rodent myocytes. Norepinephrine-mediated activation of α1-AR induces Zn2+ influx through TRPC6 channels, which reinforces β-AR-mediated positive inotropy and may help patients with heart failure. This work encourages a closer look at the consequences of Zn2+ permeation through TRP channels in human health and disease.
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Affiliation(s)
- Alexander Dietrich
- Walther-Straub-Institute of Pharmacology and Toxicology, Member of the German Centre for Lung Research (DZL), LMU Munich, Germany.
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17
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Xu L, Zhang Y, Zivkovic V, Zheng M. Deacidification of high-acid rice bran oil by the tandem continuous-flow enzymatic reactors. Food Chem 2022; 393:133440. [PMID: 35701271 DOI: 10.1016/j.foodchem.2022.133440] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/25/2022] [Accepted: 06/06/2022] [Indexed: 11/29/2022]
Abstract
Rice bran oil (RBO) contains a variety of nutrients, but the high acid values largely hinder its processing into edible oil. Thus, the tandem continuous-flow reactors are proposed and developed for the enzymatic deacidification of RBO and simultaneous production of functional oils. The results indicate that the Candida antarctica lipase B (CALB) immobilized on the hydrophobic ordered mesoporous silicon (OMS-C18) increased 6.6 times of the catalytic activity and improved at least 20 ℃ of temperature tolerance compared to the commercial Novozym 435. The tandem continuous-flow enzymatic reactors removed 91.4% of free fatty acid and increased 9 and 12 times of phytosterol ester and diacylglycerol in RBO, respectively. Moreover, the retention rate of γ-oryzanol was at least 40% higher than that obtained by traditional alkali refining. This study provides an effective and sustainable method to continuously convert the low-value RBO into value-added products, which brings huge potential to cleaner industrial production.
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Affiliation(s)
- Liujia Xu
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Hubei Hongshan Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture, Wuhan 430062, China
| | - Yi Zhang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Hubei Hongshan Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture, Wuhan 430062, China
| | - Vladimir Zivkovic
- School of Engineering, Newcastle University, Newcastle Upon Tyne NE1 7RU, UK
| | - Mingming Zheng
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Hubei Key Laboratory of Lipid Chemistry and Nutrition, Hubei Hongshan Laboratory, Key Laboratory of Oilseeds Processing, Ministry of Agriculture, Wuhan 430062, China.
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18
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Abstract
Sarcopenia is an age-related disease associated with loss of muscle mass and strength. This geriatric syndrome predisposes elderly individuals to a disability, falls, fractures, and death. Fat infiltration in muscle is one of the hallmarks of sarcopenia and aging. Alterations in fatty acid (FA) metabolism are evident in aging, type 2 diabetes, and obesity, with the accumulation of lipids inside muscle cells contributing to muscle insulin resistance and ceramide accumulation. These lipids include diacylglycerol, lipid droplets, intramyocellular lipids, intramuscular triglycerides, and polyunsaturated fatty acids (PUFAs). In this review, we examine the regulation of lipid metabolism in skeletal muscle, including lipid metabolization and storage, intervention, and the types of lipases expressed in skeletal muscle responsible for the breakdown of adipose triglyceride fats. In addition, we address the role of FAs in sarcopenia and the potential benefits of PUFAs.
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Affiliation(s)
- Ahmed Al Saedi
- Australian Institute for Musculoskeletal Science (AIMSS), The University of Melbourne and Western Health, St. Albans, VIC, Australia; Department of Medicine-Western Health, Melbourne Medical School, The University of Melbourne, St. Albans, VIC, Australia; Institute of Health and Sport (IHeS), Victoria University, Melbourne, VIC, Australia.
| | - Danielle A Debruin
- Australian Institute for Musculoskeletal Science (AIMSS), The University of Melbourne and Western Health, St. Albans, VIC, Australia; Department of Medicine-Western Health, Melbourne Medical School, The University of Melbourne, St. Albans, VIC, Australia; Institute of Health and Sport (IHeS), Victoria University, Melbourne, VIC, Australia
| | - Alan Hayes
- Australian Institute for Musculoskeletal Science (AIMSS), The University of Melbourne and Western Health, St. Albans, VIC, Australia; Department of Medicine-Western Health, Melbourne Medical School, The University of Melbourne, St. Albans, VIC, Australia; Institute of Health and Sport (IHeS), Victoria University, Melbourne, VIC, Australia
| | - Mark Hamrick
- Department of Cellular Biology & Anatomy, Medical College of Georgia, Augusta University, Laney Walker Blvd. CB2915, Augusta, GA 30912, USA
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19
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Xu Q, Qin X, Lan D, Liu X, Yang B, Liao S, Wang W, Wang Y. Water-in-oil emulsions enriched with alpha-linolenic acid in diacylglycerol form: Stability, formation mechanism and in vitro digestion analysis. Food Chem 2022; 391:133201. [PMID: 35609461 DOI: 10.1016/j.foodchem.2022.133201] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 04/18/2022] [Accepted: 05/08/2022] [Indexed: 11/30/2022]
Abstract
This study developed an alpha-linolenic acid (ALA) supplement with emulsion form using ALA-rich diacylglycerol (ALA-DAG) and ALA-DAG stearin (DAG-SF) as a new source of ALA and emulsifier. Stable, commercial surfactant-free W/O emulsions with 90 wt% oil phase (including DAG-SF and ALA-DAG with 10:90 - 20:80 wt ratio) was fabricated. Microstructure and Raman spectra revealed that the compact crystal networks and high amounts of solid acyl chains were responsible for high emulsion stability. These emulsions exhibited good potential in improving the ALA nutritional status (with ALA release level of 60.49% - 62.98%). Furthermore, the emulsifier-to-oil ratio greatly impacted the emulsion texture (solid-like or liquid-like) and emulsions showed great oxidation stability (2.80 - 3.09 meq/kg lipid of peroxide value at 6th week). The tunable texture and high oxidation stability make this emulsion system useful for a wide range of food products. This developed emulsion system could provide valuable information for other important fatty acids supplement.
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Affiliation(s)
- Qingqing Xu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Xiaoli Qin
- College of Food Science, Southwest University, Chongqing 400715, PR China
| | - Dongming Lan
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Xuan Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Bo Yang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
| | - Sentai Liao
- Sericultural and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510610, PR China
| | - Weifei Wang
- Sericultural and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510610, PR China.
| | - Yonghua Wang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China.
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20
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Chen Y, Wang W, Zhang W, Tan CP, Lan D, Wang Y. Characteristics and feasibility of olive oil-based diacylglycerol plastic fat for use in compound chocolate. Food Chem 2022; 391:133254. [PMID: 35617761 DOI: 10.1016/j.foodchem.2022.133254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 04/20/2022] [Accepted: 05/17/2022] [Indexed: 11/04/2022]
Abstract
With an aim to prepare the healthier functional chocolate, olive oil-based diacylglycerol plastic fat (ODAGP) was prepared by mixing olive oil-based diacylglycerol stearin (O-DAGS) and olive oil-based diacylglycerol olein (O-DAGO) as confectionery fat in compound chocolate. We reported the physicochemical properties of ODAGP and ODAGP-CB blends, and then evaluated their application potential in compound chocolate based on sensory, blooming property and polymorphic transition. ODAGP (40% O-DAGS) showed a wide plastic range (7.1-45.2%) and high component compatibility. The crystal properties results indicated that ODAGP mainly existed in stable β-forms (β1 and β2). On the other hand, the ODAGP-CB binary system containing 10-40% ODAGP displayed similar melt-in-mouth property and crystal polymorphism (Form V) to natural CB. Compound chocolate prepared with ODAGP-CB blends obtained satisfactory overall acceptability (score > 7.8) and showed stronger fat bloom resistance.
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Affiliation(s)
- Ying Chen
- Department of Food Science and Engineering, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Weifei Wang
- Sericultural and Agrifood Res Inst, Guangdong Academy of Agricultural Sciences, Guangzhou 510610, China
| | - Weiqian Zhang
- Department of Food Science and Engineering, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Chin-Ping Tan
- Department of Food Technology, Faculty of Food Science and Technology, University Putra Malaysia, Serdang 43400, Malaysia
| | - Dongming Lan
- Department of Food Science and Engineering, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Yonghua Wang
- Department of Food Science and Engineering, School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Youmei Institute of Intelligent Bio-manufacturing, Foshan 528225, China.
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21
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Heinonen S, Lautala S, Koivuniemi A, Bunker A. Insights into the behavior of unsaturated diacylglycerols in mixed lipid bilayers in relation to protein kinase C activation-A molecular dynamics simulation study. Biochim Biophys Acta Biomembr 2022; 1864:183961. [PMID: 35568204 DOI: 10.1016/j.bbamem.2022.183961] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 05/02/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
The lipid second messenger diacylglycerol (DAG) is known for its involvement in many types of cellular signaling, especially as an endogenous agonist for protein kinase C (PKC). Evidence has emerged that the degree of saturation of the DAG molecules can affect PKC activation. DAG molecules with different acyl chain saturation have not only been observed to induce varying extents of PKC activation, but also to express selectivity towards different PKC isozymes. Both qualities are important for precise therapeutic activation of PKC; understanding DAG behavior at the molecular level in different environments has much potential in the development of drugs to target PKC. We used molecular dynamics simulations to study the behavior of two different unsaturated DAG species in lipid environments with varying degrees of unsaturation. We focus on phosphatidylethanolamine (PE) instead of phosphatidylcholine (PC) to more accurately model the relevant biomembranes. The effect of cholesterol (CHOL) on these systems was also explored. We found that both high level of unsaturation in the acyl chains of the DAG species and presence of CHOL in the surrounding membrane increase DAG molecule availability at the lipid-water interface. This can partially explain the previously observed differences in PKC activation strength and specificity, the complete mechanism is, however, likely to be more complex. Our simulations coupled with the current understanding of lipids highlight the need for more simulations of biologically accurate lipid environments in order to determine the correct correlations between molecular mechanisms and biological behavior when studying PKC activation.
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Affiliation(s)
- Suvi Heinonen
- Drug Research Program, Division of Pharmaceutical Biosciences, University of Helsinki, FI-00014, Helsinki, Finland
| | - Saara Lautala
- Drug Research Program, Division of Pharmaceutical Biosciences, University of Helsinki, FI-00014, Helsinki, Finland.
| | - Artturi Koivuniemi
- Drug Research Program, Division of Pharmaceutical Biosciences, University of Helsinki, FI-00014, Helsinki, Finland
| | - Alex Bunker
- Drug Research Program, Division of Pharmaceutical Biosciences, University of Helsinki, FI-00014, Helsinki, Finland
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22
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Qiu C, Wang S, Wang Y, Lee WJ, Fu J, Binks BP, Wang Y. Stabilisation of oleofoams by lauric acid and its glycerol esters. Food Chem 2022; 386:132776. [PMID: 35509162 DOI: 10.1016/j.foodchem.2022.132776] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/16/2022] [Accepted: 03/21/2022] [Indexed: 11/19/2022]
Abstract
Four types of pure lipid, namely lauric acid (LA), glycerol monolaurate (MAG), diglycerol laurate (DAG) and triglyceride laurate (TAG) were used to prepare oleofoams. The relationship between crystal profiles and their performance in oleofoams was established. DAG formed small needle-like crystals while MAG formed large flake-like crystals in oleogels, and crystal shells around air bubbles were observed in LA-, MAG- and DAG-based oleofoams. LA and DAG displayed higher over-run whereas DAG-stabilised foam possessed smaller bubbles and higher physical stability due to the presence of small β and β' crystals. Upon heating, DAG and TAG-based foams showed varying extents of oil drainage indicating the crystals were distributed in a different manner. Therefore, DAG was shown to be an excellent gelator in the fabrication of ultra-stable oleofoams. This work extends the lipid varieties with nutritional features and allows a better understanding on the stabilization mechanisms of lauric acid lipids in oleofoams.
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Affiliation(s)
- Chaoying Qiu
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS), Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery, Guangzhou 510632, China
| | - Shaolin Wang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS), Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery, Guangzhou 510632, China; National R&D Center for Freshwater Fish Processing, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
| | - Ying Wang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS), Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery, Guangzhou 510632, China
| | - Wan Jun Lee
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS), Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery, Guangzhou 510632, China
| | - Junning Fu
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS), Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery, Guangzhou 510632, China
| | - Bernard P Binks
- Department of Chemistry, University of Hull, Hull HU6 7RX, UK.
| | - Yong Wang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety (POPS), Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong Engineering Technology Research Center for Cereal and Oil Byproduct Biorefinery, Guangzhou 510632, China.
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23
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Verma L, Bhadouria J, Bhunia RK, Singh S, Panchal P, Bhatia C, Eastmond PJ, Giri J. Monogalactosyl diacylglycerol synthase 3 affects phosphate utilization and acquisition in rice. J Exp Bot 2022; 73:5033-5051. [PMID: 35526193 DOI: 10.1093/jxb/erac192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 05/05/2022] [Indexed: 06/14/2023]
Abstract
Galactolipids are essential to compensate for the loss of phospholipids by 'membrane lipid remodelling' in plants under phosphorus (P) deficiency conditions. Monogalactosyl diacylglycerol (MGDG) synthases catalyse the synthesis of MGDG which is further converted into digalactosyl diacylglycerol (DGDG), later replacing phospholipids in the extraplastidial membranes. However, the roles of these enzymes are not well explored in rice. In this study, the rice MGDG synthase 3 gene (OsMGD3) was identified and functionally characterized. We showed that the plant phosphate (Pi) status and the transcription factor PHOSPHATE STARVATION RESPONSE 2 (OsPHR2) are involved in the transcriptional regulation of OsMGD3. CRISPR/Cas9 knockout and overexpression lines of OsMGD3 were generated to explore its potential role in rice adaptation to Pi deficiency. Compared with the wild type, OsMGD3 knockout lines displayed a reduced Pi acquisition and utilization while overexpression lines showed an enhancement of the same. Further, OsMGD3 showed a predominant role in roots, altering lateral root growth. Our comprehensive lipidomic analysis revealed a role of OsMGD3 in membrane lipid remodelling, in addition to a role in regulating diacylglycerol and phosphatidic acid contents that affected the expression of Pi transporters. Our study highlights the role of OsMGD3 in affecting both internal P utilization and P acquisition in rice.
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Affiliation(s)
- Lokesh Verma
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
| | - Jyoti Bhadouria
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
| | - Rupam Kumar Bhunia
- National Agri-Food Biotechnology Institute (NABI), Mohali, Punjab, India
- Plant Science Department, Rothamsted Research, Harpenden, Hertfordshire, UK
| | - Shweta Singh
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
| | - Poonam Panchal
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
| | - Chitra Bhatia
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
| | - Peter J Eastmond
- Plant Science Department, Rothamsted Research, Harpenden, Hertfordshire, UK
| | - Jitender Giri
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
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24
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DiPasquale M, Deering TG, Desai D, Sharma AK, Amin S, Fox TE, Kester M, Katsaras J, Marquardt D, Heberle FA. Influence of ceramide on lipid domain stability studied with small-angle neutron scattering: The role of acyl chain length and unsaturation. Chem Phys Lipids 2022; 245:105205. [PMID: 35483419 PMCID: PMC9320172 DOI: 10.1016/j.chemphyslip.2022.105205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 04/11/2022] [Indexed: 12/13/2022]
Abstract
Ceramides and diacylglycerols are groups of lipids capable of nucleating and stabilizing ordered lipid domains, structures that have been implicated in a range of biological processes. Previous studies have used fluorescence reporter molecules to explore the influence of ceramide acyl chain structure on sphingolipid-rich ordered phases. Here, we use small-angle neutron scattering (SANS) to examine the ability of ceramides and diacylglycerols to promote lipid domain formation in the well-characterized domain-forming mixture DPPC/DOPC/cholesterol. SANS is a powerful, probe-free technique for interrogating membrane heterogeneity, as it is differentially sensitive to hydrogen's stable isotopes protium and deuterium. Specifically, neutron contrast is generated through selective deuteration of lipid species, thus enabling the detection of nanoscopic domains enriched in deuterated saturated lipids dispersed in a matrix of protiated unsaturated lipids. Using large unilamellar vesicles, we found that upon replacing 10 mol% DPPC with either C16:0 or C18:0 ceramide, or 16:0 diacylglycerol (dag), lipid domains persisted to higher temperatures. However, when DPPC was replaced with short chain (C6:0 or C12:0) or very long chain (C24:0) ceramides, or ceramides with unsaturated acyl chains of any length (C6:1(3), C6:1(5), C18:1, and C24:1), as well as C18:1-dag, lipid domains were destabilized, melting at lower temperatures than those in the DPPC/DOPC/cholesterol system. These results show how ceramide acyl chain length and unsaturation influence lipid domains and have implications for how cell membranes might modify their function through the generation of different ceramide species.
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Affiliation(s)
- Mitchell DiPasquale
- Department of Chemistry and Biochemistry, University of Windsor, Windsor N9B 3P4, ON, Canada
| | - Tye G Deering
- Department of Pharmacology, University of Virginia, Charlottesville 22908, VA, USA
| | - Dhimant Desai
- Department of Pharmacology, Penn State University, University Park 16801, PA, USA
| | - Arun K Sharma
- Department of Pharmacology, Penn State University, University Park 16801, PA, USA
| | - Shantu Amin
- Department of Pharmacology, Penn State University, University Park 16801, PA, USA
| | - Todd E Fox
- Department of Pharmacology, University of Virginia, Charlottesville 22908, VA, USA
| | - Mark Kester
- Department of Pharmacology, University of Virginia, Charlottesville 22908, VA, USA; Department of Molecular Physiology and Biophysics, University of Virginia, Charlottesville 22908, VA, USA
| | - John Katsaras
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge 37831, TN, USA; Joint Institute for Neutron Sciences, Oak Ridge National Laboratory, Oak Ridge 37831, TN, USA; Department of Physics and Astronomy, University of Tennessee, Knoxville 37996, TN, USA.
| | - Drew Marquardt
- Department of Chemistry and Biochemistry, University of Windsor, Windsor N9B 3P4, ON, Canada; Department of Physics, University of Windsor, Windsor N9B 3P4, ON, Canada.
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25
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Pei Y, Song Y, Wang B, Lin C, Yang Y, Li H, Feng Z. Integrated lipidomics and RNA sequencing analysis reveal novel changes during 3T3-L1 cell adipogenesis. PeerJ 2022; 10:e13417. [PMID: 35529487 PMCID: PMC9074861 DOI: 10.7717/peerj.13417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 04/19/2022] [Indexed: 01/14/2023] Open
Abstract
After adipogenic differentiation, key regulators of adipogenesis are stimulated and cells begin to accumulate lipids. To identify specific changes in lipid composition and gene expression patterns during 3T3-L1 cell adipogenesis, we carried out lipidomics and RNA sequencing analysis of undifferentiated and differentiated 3T3-L1 cells. The analysis revealed significant changes in lipid content and gene expression patterns during adipogenesis. Slc2a4 was up-regulated, which may enhance glucose transport; Gpat3, Agpat2, Lipin1 and Dgat were also up-regulated, potentially to enrich intracellular triacylglycerol (TG). Increased expression levels of Pnpla2, Lipe, Acsl1 and Lpl likely increase intracellular free fatty acids, which can then be used for subsequent synthesis of other lipids, such as sphingomyelin (SM) and ceramide (Cer). Enriched intracellular diacylglycerol (DG) can also provide more raw materials for the synthesis of phosphatidylinositol (PI), phosphatidylcholine (PC), phosphatidylethanolamine (PE), ether-PE, and ether-PC, whereas high expression of Pla3 may enhance the formation of lysophophatidylcholine (LPC) and lysophosphatidylethanolamine (LPE). Therefore, in the process of adipogenesis of 3T3-L1 cells, a series of genes are activated, resulting in large changes in the contents of various lipid metabolites in the cells, especially TG, DG, SM, Cer, PI, PC, PE, etherPE, etherPC, LPC and LPE. These findings provide a theoretical basis for our understanding the pathophysiology of obesity.
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Affiliation(s)
- Yangli Pei
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Yuxin Song
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Bingyuan Wang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chenghong Lin
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Ying Yang
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Hua Li
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, China
| | - Zheng Feng
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and Engineering, Foshan University, Foshan, China
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26
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Khondker S, Han GS, Carman GM. Phosphorylation-mediated regulation of the Nem1-Spo7/Pah1 phosphatase cascade in yeast lipid synthesis. Adv Biol Regul 2022; 84:100889. [PMID: 35231723 PMCID: PMC9149063 DOI: 10.1016/j.jbior.2022.100889] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/08/2022] [Accepted: 02/15/2022] [Indexed: 05/03/2023]
Abstract
The PAH1-encoded phosphatidate phosphatase, which catalyzes the dephosphorylation of phosphatidate to produce diacylglycerol, controls the divergence of phosphatidate into triacylglycerol synthesis and phospholipid synthesis. Pah1 is inactive in the cytosol as a phosphorylated form and becomes active on the nuclear/endoplasmic reticulum membrane as a dephosphorylated form by the Nem1-Spo7 protein phosphatase complex. The phosphorylation of Pah1 by protein kinases, which include casein kinases I and II, Pho85-Pho80, Cdc28-cyclin B, and protein kinases A and C, controls its cellular location, catalytic activity, and susceptibility to proteasomal degradation. Nem1 (catalytic subunit) and Spo7 (regulatory subunit), which form a protein phosphatase complex catalyzing the dephosphorylation of Pah1 for its activation, are phosphorylated by protein kinases A and C. In this review, we discuss the functions and interrelationships of the protein kinases in the control of the Nem1-Spo7/Pah1 phosphatase cascade and lipid synthesis.
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Affiliation(s)
- Shoily Khondker
- Department of Food Science and the Rutgers Center for Lipid Research, New Jersey Institute for Food, Nutrition, and Health, Rutgers University, New Brunswick, NJ, 08901, USA
| | - Gil-Soo Han
- Department of Food Science and the Rutgers Center for Lipid Research, New Jersey Institute for Food, Nutrition, and Health, Rutgers University, New Brunswick, NJ, 08901, USA
| | - George M Carman
- Department of Food Science and the Rutgers Center for Lipid Research, New Jersey Institute for Food, Nutrition, and Health, Rutgers University, New Brunswick, NJ, 08901, USA.
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27
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Ali U, Lu S, Fadlalla T, Iqbal S, Yue H, Yang B, Hong Y, Wang X, Guo L. The functions of phospholipases and their hydrolysis products in plant growth, development and stress responses. Prog Lipid Res 2022; 86:101158. [PMID: 35134459 DOI: 10.1016/j.plipres.2022.101158] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 01/31/2022] [Accepted: 01/31/2022] [Indexed: 12/15/2022]
Abstract
Cell membranes are the initial site of stimulus perception from environment and phospholipids are the basic and important components of cell membranes. Phospholipases hydrolyze membrane lipids to generate various cellular mediators. These phospholipase-derived products, such as diacylglycerol, phosphatidic acid, inositol phosphates, lysophopsholipids, and free fatty acids, act as second messengers, playing vital roles in signal transduction during plant growth, development, and stress responses. This review focuses on the structure, substrate specificities, reaction requirements, and acting mechanism of several phospholipase families. It will discuss their functional significance in plant growth, development, and stress responses. In addition, it will highlight some critical knowledge gaps in the action mechanism, metabolic and signaling roles of these phospholipases and their products in the context of plant growth, development and stress responses.
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Affiliation(s)
- Usman Ali
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China
| | - Shaoping Lu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China
| | - Tarig Fadlalla
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Sidra Iqbal
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Department of Agriculture, University of Swabi, Khyber Pakhtunkhwa, Pakistan
| | - Hong Yue
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China
| | - Bao Yang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China
| | - Yueyun Hong
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China
| | - Xuemin Wang
- Department of Biology, University of Missouri-St. Louis, St. Louis, MO 63121, USA; Donald Danforth Plant Science Center, St. Louis, MO 63132, USA
| | - Liang Guo
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China.
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28
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Liu Y, Lee WJ, Tan CP, Lai OM, Wang Y, Qiu C. W/O high internal phase emulsion featuring by interfacial crystallization of diacylglycerol and different internal compositions. Food Chem 2022; 372:131305. [PMID: 34653777 DOI: 10.1016/j.foodchem.2021.131305] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/30/2021] [Accepted: 09/30/2021] [Indexed: 11/19/2022]
Abstract
High internal phase emulsions (HIPEs) show promising application in food and cosmetic industries. In this work, diacylglycerol (DAG) was applied to fabricate water-in-oil (W/O) HIPEs. DAG-based emulsion can hold 60% water and the emulsion rigidity increased with water content, indicating the water droplets acted as "active fillers". Stable HIPE with 80% water fraction was formed through the combination of 6 wt% DAG with 1 wt% polyglycerol polyricinoleate (PGPR). The addition of 1 w% kappa (κ)-carrageenan and 0.5 M NaCl greatly reduced the droplet size and enhanced emulsion rigidity, and the interfacial tension of the internal phase was reduced. Benefiting from the Pickering crystals-stabilized interface by DAG as revealed by the microscopy and enhanced elastic modulus of emulsions with the gelation agents, the HIPEs demonstrated good retaining ability for anthocyanin and β-carotene. This study provides insights for the development of W/O HIPEs to fabricate low-calories margarines, spread or cosmetic creams.
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Affiliation(s)
- Yingwei Liu
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong International Joint Research Center for Oilseed Biorefinery, Nutrition and Safety, Guangzhou 510632, China
| | - Wan Jun Lee
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong International Joint Research Center for Oilseed Biorefinery, Nutrition and Safety, Guangzhou 510632, China
| | - Chin Ping Tan
- Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, 43300 Selangor, Malaysia
| | - Oi Ming Lai
- Department of Bioprocess Technology, Faculty of Biotechnology & Biomolecular Sciences, Universiti Putra Malaysia, 43300 Selangor, Malaysia
| | - Yong Wang
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong International Joint Research Center for Oilseed Biorefinery, Nutrition and Safety, Guangzhou 510632, China
| | - Chaoying Qiu
- JNU-UPM International Joint Laboratory on Plant Oil Processing and Safety, Department of Food Science and Engineering, Jinan University, Guangzhou 510632, China; Guangdong International Joint Research Center for Oilseed Biorefinery, Nutrition and Safety, Guangzhou 510632, China
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29
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Stone SJ. Mechanisms of intestinal triacylglycerol synthesis. Biochim Biophys Acta Mol Cell Biol Lipids 2022; 1867:159151. [PMID: 35296424 DOI: 10.1016/j.bbalip.2022.159151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/13/2022] [Accepted: 02/16/2022] [Indexed: 02/07/2023]
Abstract
Triacylglycerols are a major source of stored energy that are obtained either from the diet or can be synthesized to some extent by most tissues. Alterations in pathways of triacylglycerol metabolism can result in their excessive accumulation leading to obesity, insulin resistance, cardiovascular disease and nonalcoholic fatty liver disease. Most tissues in mammals synthesize triacylglycerols via the glycerol 3-phosphate pathway. However, in the small intestine the monoacylglycerol acyltransferase pathway is the predominant pathway for triacylglycerol biosynthesis where it participates in the absorption of dietary triacylglycerol. In this review, the enzymes that are part of both the glycerol 3-phosphate and monoacylglycerol acyltransferase pathways and their contributions to intestinal triacylglycerol metabolism are reviewed. The potential of some of the enzymes involved in triacylglycerol synthesis in the small intestine as possible therapeutic targets for treating metabolic disorders associated with elevated triacylglycerol is briefly discussed.
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Affiliation(s)
- Scot J Stone
- Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E5, Canada.
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30
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Xu Y, Lv Y, Zhao H, He X, Li X, Yi S, Li J. Diacylglycerol pre-emulsion prepared through ultrasound improves the gel properties of golden thread surimi. Ultrason Sonochem 2022; 82:105915. [PMID: 35042162 PMCID: PMC8777156 DOI: 10.1016/j.ultsonch.2022.105915] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/03/2022] [Accepted: 01/10/2022] [Indexed: 05/07/2023]
Abstract
This study determined the influence of diacylglycerol (DAG) pre-emulsion on the gel properties and microstructure of golden thread surimi gels. DAG emulsion stabilized using sodium caseinate was pre-emulsified through ultrasound. The average particle size of DAG pre-emulsion decreased from 1324.15 nm to 41.19 nm, with notable improvements in apparent viscosity and storage stability. The surimi gels with different amounts (0%, 1%, 3%, 5%, and 7% w/w) of DAG pre-emulsion were prepared under heat induction. The whiteness of the composite gels markedly increased with the incorporation of DAG pre-emulsion. The peak T22 value of immobilized water, the gel strength, and water-holding capacity increased gradually, but it slightly decreased with the addition of 7% pre-emulsion. The curve of G' and G″ kept climbing as the concentration of pre-emulsion, and the microstructure of the gel network tended to become denser and more orderly. Principal component analysis (PCA) of electronic nose results showed that the surimi gels containing pre-emulsion could be clearly distinguished from the control group. In conclusion, the addition of 5% DAG pre-emulsion to surimi not only improved gel properties to the highest extent but also be compensated for lipid loss during the rinsing of surimi.
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Affiliation(s)
- Yongxia Xu
- College of Food Science and Engineering, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
| | - Yanan Lv
- College of Food Science and Engineering, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
| | - Honglei Zhao
- College of Food Science and Engineering, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
| | - Xueli He
- College of Food Science and Engineering, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
| | - Xuepeng Li
- College of Food Science and Engineering, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China.
| | - Shumin Yi
- College of Food Science and Engineering, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China
| | - Jianrong Li
- College of Food Science and Engineering, Bohai University, National R&D Branch Center of Surimi and Surimi Products Processing, Jinzhou, Liaoning 121013, China.
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31
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Ware TB, Hsu KL. Advances in chemical proteomic evaluation of lipid kinases-DAG kinases as a case study. Curr Opin Chem Biol 2021; 65:101-108. [PMID: 34311404 PMCID: PMC8671151 DOI: 10.1016/j.cbpa.2021.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/24/2021] [Accepted: 06/18/2021] [Indexed: 10/20/2022]
Abstract
Advancements in chemical proteomics and mass spectrometry lipidomics are providing new opportunities to understand lipid kinase activity, specificity, and regulation on a global cellular scale. Here, we describe recent developments in chemical biology of lipid kinases with a focus on those members that phosphorylate diacylglycerols. We further discuss future implications of how these mass spectrometry-based approaches can be adapted for studies of additional lipid kinase members with the aim of bridging the gap between protein and lipid kinase-focused investigations.
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Affiliation(s)
- Timothy B Ware
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, United States
| | - Ku-Lung Hsu
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, United States; Department of Pharmacology, University of Virginia School of Medicine, Charlottesville, VA 22908, United States; Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, United States; University of Virginia Cancer Center, University of Virginia, Charlottesville, VA 22903, USA.
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32
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Cui H, Huang Y, Wu Y, Ma J, Cao X, Xie J, Zhang Y. The expression of diacylglycerol kinase isoforms α and ζ correlates with the progression of experimental autoimmune encephalomyelitis in rats. Histochem Cell Biol 2021; 156:437-448. [PMID: 34312706 DOI: 10.1007/s00418-021-02011-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2021] [Indexed: 12/26/2022]
Abstract
Multiple sclerosis (MS) is characterized by neuroinflammation and neurodegeneration, whose precise processes are not fully understood. Diacylglycerol kinase (DGK) isozymes of α, β, γ and ζ expressed abundantly in the brain and/or the immune system, may be regulatory targets for MS. In this study, we analyzed the four DGK isozymes along the induction, peak and recovery phases in an experimental autoimmune encephalomyelitis (EAE) rat model of MS. The expression of these DGK isozymes and the diacylglycerol (DAG) pathway in the EAE rat brainstems were analyzed by qRT-PCR, immunohistochemistry, immunofluorescence double staining, western blotting and ELISA. Our results showed that the mRNA content of the four DGK isozymes decreased significantly, and their immunoreactivity in myelin sheathes (DGKα, β) and neurons (DGKγ, ζ) became weaker at the beginning of the induction phase. With the progressive increase in clinical signs, DGKα, DGKγ and DGKζ mRNA increased and DGKβ mRNA decreased, and microglia were involved in the formation of perivascular cuffing. In the peak phase, both DGKα and DGKζ were expressed in neurons and inflammatory cells, and DGKζ was also positive in microglia. During the recovery phase, the mRNA content and immunoreactivity of these DGK isozymes generally reached normal levels. Moreover, our results revealed that changes in DAG accumulation and PKCδ phosphorylation were almost the same as those of DGKα and DGKζ mRNA. In summary, the four DGK isozymes are involved in the EAE process. The predominant and broad presence of DGKα and DGKζ suggests that they may regulate the pathological process by attenuating DAG/PKCδ pathway signaling during EAE evolution.
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Affiliation(s)
- Huilin Cui
- Department of Histology and Embryology, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Yige Huang
- Department of Histology and Embryology, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Ying Wu
- Department of Histology and Embryology, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Jinfeng Ma
- Department of General Surgery, Shanxi Cancer Hospital, Taiyuan, 030013, Shanxi, China
| | - Ximei Cao
- Department of Histology and Embryology, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Jianshan Xie
- Department of Histology and Embryology, Shanxi Medical University, Taiyuan, 030001, Shanxi, China
| | - Yu Zhang
- Key Laboratory of Cellular Physiology (Shanxi Medical University), Ministry of Education, and the Department of Physiology, Shanxi Medical University, No.56 Xinjiannan Road, Taiyuan, 030001, Shanxi, China.
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33
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Xue X, He H, Liu C, Wang L, Wang L, Wang Y, Wang L, Yang C, Wang J, Hou R. l-Theanine improves emulsification stability and antioxidant capacity of diacylglycerol by hydrophobic binding β-lactoglobulin as emulsion surface stabilizer. Food Chem 2021; 366:130557. [PMID: 34284195 DOI: 10.1016/j.foodchem.2021.130557] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/14/2021] [Accepted: 07/06/2021] [Indexed: 12/18/2022]
Abstract
Diacylglycerol (DAG) is commonly used as fat substitute in food manufacture due to its functional properties, but DAG has poor emulsification and oxidation stability, which limits its wide application in food industry. In this work, fluorescence quenching data and thermodynamic parameters were analyzed to investigate the interaction mechanism between l-theanine (L-Th) and β-lactoglobulin (β-LG). DAG emulsion was prepared by using β-lactoglobulin-theanine (β-LG-Th) as surface stabilizer, and its emulsification and oxidation stability were evaluated. The results showed that the hydrophobic interaction played an important role on the conjugate of β-LG and L-Th due to the negative values for ΔG, positive values for ΔH and ΔS at pH 4.0, pH 6.0 and pH 8.0. The DAG has been better embedded by using β-LG-Th as surface stabilizer, and the droplet size was about 0.2 µm to 1.5 µm when the pH was 6.0, the ratio of L-Th to β-LG was 1:1. β-LG-Th as surface stabilizer for DAG can increase the ζ-potential and emulsion index, make the emulsion droplet size distribution more uniform. The l-theanine was better to be used to improve the emulsification stability and antioxidant capacity of DAG by binding β-LG as surface stabilizer.
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Affiliation(s)
- Xiuheng Xue
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Haiyong He
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Cunjun Liu
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Li Wang
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Lu Wang
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Yueji Wang
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Luping Wang
- College of Animal Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Chen Yang
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China
| | - Juhua Wang
- College of Animal Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China.
| | - Ruyan Hou
- State Key Laboratory of Tea Plant Biology and Utilization, College of Tea and Food Science & Technology, Anhui Agricultural University, Hefei, Anhui 230036, PR China.
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Serrano-López EM, López-Martínez D, Gómez-Fernández JC, Egea-Jiménez AL, Corbalán-García S. PKCε controls the fusion of secretory vesicles in mast cells in a phosphatidic acid-dependent mode. Int J Biol Macromol 2021; 185:377-389. [PMID: 34147527 DOI: 10.1016/j.ijbiomac.2021.06.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/28/2021] [Accepted: 06/02/2021] [Indexed: 11/28/2022]
Abstract
PKCε is highly expressed in mast cells and plays a fundamental role in the antigen-triggered activation of the allergic reaction. Although its regulation by diacylglycerols has been described, its regulation by acidic phospholipids and how this regulation leads to the control of downstream vesicle secretion is barely known. Here, we used structural and evolutionary studies to find the molecular mechanism that explains the selectivity of the C1B domain of PKCε by Phosphatidic Acid (PA). This resided in a collection of Arg residues that form a specific rim on the outer surface of the C1B domain, around the diacylglycerol binding cleft. In RBL-2H3 cells, this basic rim allowed the kinase to respond specifically to phosphatidic acid signals that induced its translocation to the plasma membrane and subsequent activation. Further experiments in cells that overexpress PKCε and a mutant of the PA binding site, showed that PA-dependent PKCε activation increased vesicle degranulation in RBL-2H3 cells, and this correlated with increased SNAP23 phosphorylation. Over-expression of PKCε in these cells also induced an increase in the number of docked vesicles containing SNAP23, when stimulated with PA. This accumulation could be attributed to the stabilizing effect of phosphorylation on the formation of the SNARE complex, which ultimately led to increased release of content in the presence of Ca2+ during the fusion process. Therefore, these findings reinforce the importance of PA signaling in the activation of PKCε, which could be an important target to inhibit the exacerbated responses of these cells in the allergic reaction.
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Affiliation(s)
- Emilio M Serrano-López
- Department of Biochemistry and Molecular Biology A, Veterinary School, Universidad de Murcia, IMIB, CEIR Campus Mare Nostrum (CMN), Campus Espinardo, 30100 Murcia, Spain
| | - David López-Martínez
- Department of Biochemistry and Molecular Biology A, Veterinary School, Universidad de Murcia, IMIB, CEIR Campus Mare Nostrum (CMN), Campus Espinardo, 30100 Murcia, Spain
| | - Juan C Gómez-Fernández
- Department of Biochemistry and Molecular Biology A, Veterinary School, Universidad de Murcia, IMIB, CEIR Campus Mare Nostrum (CMN), Campus Espinardo, 30100 Murcia, Spain.
| | - Antonio Luis Egea-Jiménez
- Centre de Recherche en Cancérologie de Marseille (CRCM), Equipe labellisée LIGUE 2018, Aix-Marseille Université, Marseille F-13284, France; Inserm U1068, Institut Paoli-Calmettes, and CNRS UMR7258, Marseille F-13009, France.
| | - Senena Corbalán-García
- Department of Biochemistry and Molecular Biology A, Veterinary School, Universidad de Murcia, IMIB, CEIR Campus Mare Nostrum (CMN), Campus Espinardo, 30100 Murcia, Spain.
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El-Fayoumi S, Mansour R, Mahmoud A, Fahmy A, Ibrahim I. Pioglitazone Enhances β-Arrestin2 Signaling and Ameliorates Insulin Resistance in Classical Insulin Target Tissues. Pharmacology 2021; 106:409-417. [PMID: 34082428 DOI: 10.1159/000515936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 03/15/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Pioglitazone is a thiazolidinedione oral antidiabetic agent. This study aimed to investigate the effects of pioglitazone as insulin sensitizer on β-arrestin2 signaling in classical insulin target tissues. METHODS Experiments involved three groups of mice; the first one involved mice fed standard chow diet for 16 weeks; the second one involved mice fed high-fructose, high-fat diet (HFrHFD) for 16 weeks; and the third one involved mice fed HFrHFD for 16 weeks and received pioglitazone (30 mg/kg/day, orally) in the last four weeks of feeding HFrHFD. RESULTS The results showed significant improvement in the insulin sensitivity of pioglitazone-treated mice as manifested by significant reduction in the insulin resistance index. This improvement in insulin sensitivity was associated with significant increases in the β-arrestin2 levels in the adipose tissue, liver, and skeletal muscle. Moreover, pioglitazone significantly increased β-arrestin2 signaling in all the examined tissues as estimated from significant increases in phosphatidylinositol 4,5 bisphosphate and phosphorylation of Akt at serine 473 and significant decrease in diacylglycerol level. CONCLUSION To the best of our knowledge, our work reports a new mechanism of action for pioglitazone through which it can enhance the insulin sensitivity. Pioglitazone increases β-arrestin2 signaling in the adipose tissue, liver, and skeletal muscle of HFrHFD-fed mice.
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Affiliation(s)
- Shaimaa El-Fayoumi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt.,Department of Pharmacology, Faculty of Pharmacy, Heliopolis University, Cairo, Egypt
| | - Rehab Mansour
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt.,Central Administration, Zagazig University Hospitals, Zagazig, Egypt
| | - Amr Mahmoud
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt.,Department of Pharmacology, Pharmacy Program, Oman College of Health Sciences, Muscat, Oman
| | - Ahmed Fahmy
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Islam Ibrahim
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
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Storch U, Mederos Y Schnitzler M, Gudermann T. A greasy business: Identification of a diacylglycerol binding site in human TRPC5 channels by cryo-EM. Cell Calcium 2021; 97:102414. [PMID: 33930818 DOI: 10.1016/j.ceca.2021.102414] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 04/21/2021] [Indexed: 11/22/2022]
Abstract
The transient receptor potential classical or canonical (TRPC) 5 channel is a non-selective calcium-permeable cation channel that recently emerged as a promising target for the treatment of various diseases such as mental disorders and kidney diseases. Thus, detailed insight into the structural properties of TRPC5 channels is of utmost importance to further advance TRPC5 channels as drug targets. Recently, Song et al. (2021) have presented cryo-EM structures of the human TRPC5 channel alone or in complex with two different inhibitors thereby revealing two new distinct drug binding sites. Moreover, a binding site for the second messenger diacylglycerol (DAG) has been identified commensurate with a key role of DAG for TRPC5 channel activation.
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Affiliation(s)
- Ursula Storch
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig Maximilian University of Munich, 80336, Munich, Germany; Institute for Cardiovascular Prevention (IPEK), Ludwig Maximilian University of Munich, 80336, Munich, Germany
| | - Michael Mederos Y Schnitzler
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig Maximilian University of Munich, 80336, Munich, Germany; DZHK (German Centre for Cardiovascular Research), Munich Heart Alliance, Munich, Germany.
| | - Thomas Gudermann
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig Maximilian University of Munich, 80336, Munich, Germany; German Center for Lung Research, Munich, Germany.
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Nicholson RA, Marangoni AG. Lipase-catalyzed glycerolysis extended to the conversion of a variety of edible oils into structural fats. Curr Res Food Sci 2021; 4:163-174. [PMID: 33855303 PMCID: PMC8026901 DOI: 10.1016/j.crfs.2021.03.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/10/2021] [Accepted: 03/11/2021] [Indexed: 11/30/2022] Open
Abstract
Lipase-catalyzed glycerolysis was recently shown to be a viable technique to structure cottonseed and peanut oils into structural fats by converting native triacylglycerols into partial glycerides without changing overall fatty acid composition. Here, this approach was extended to a variety oils of differing fatty acid compositions. Reactions were performed at 65 °C for 48 h at a triacylglycerol:glycerol molar ratio of 1:1, using the non-regiospecific Candida antarctica lipase B. In all oil systems, a 20 °C increase in crystallization onset temperature was observed following glycerolysis. Solid fat content increases resulting from glycerolysis were greatest for oils containing >10% saturated fat along with a high oleic acid content. The solid fat content of tigernut oil at 5 °C increased from 8% to 34% following glycerolysis. Tigernut glycerolysis product was used to make margarine with plasticity similar to commercial margarine and butter. This research demonstrates that glycerolysis is a general strategy to convert liquid oils into structural fats used in food applications, and thus replace palm oil and hydrogenated fats.
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Affiliation(s)
- Reed A. Nicholson
- Department of Food Science, University of Guelph, Guelph, ON, N1G 2W1, Canada
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Abstract
Our skin is the interface between us and our environment - a flexible barrier that has evolved for protection, immunity, regulation and sensation. Once regarded as inert, we now know that it is a dynamic environment. Skin lipids are crucial to the structure and function of skin. From deep in the hypodermis, through the ceramide-rich epidermis, to the lipids of the skin surface, there are a vast array of different lipids with important roles to play. This review firstly discusses the lipid composition of human skin and secondly, changes that have been found in skin lipid composition in different skin diseases. Further research into skin lipids facilitated by ever-improving methodologies will no doubt generate new knowledge, paving the way for diagnosis, prevention and treatment of skin disorders and diseases.
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Affiliation(s)
- Sophie Knox
- School of Pharmacy and Pharmaceutical Sciences, Panoz Institute, Trinity College Dublin, D02 PN40, Ireland
| | - Niamh M O'Boyle
- School of Pharmacy and Pharmaceutical Sciences, Panoz Institute, Trinity College Dublin, D02 PN40, Ireland.
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Katti S, Igumenova TI. Structural insights into C1-ligand interactions: Filling the gaps by in silico methods. Adv Biol Regul 2021; 79:100784. [PMID: 33526356 DOI: 10.1016/j.jbior.2020.100784] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 12/24/2020] [Accepted: 12/28/2020] [Indexed: 02/05/2023]
Abstract
Protein Kinase C isoenzymes (PKCs) are the key mediators of the phosphoinositide signaling pathway, which involves regulated hydrolysis of phosphatidylinositol (4,5)-bisphosphate to diacylglycerol (DAG) and inositol-1,4,5-trisphosphate. Dysregulation of PKCs is implicated in many human diseases making this class of enzymes an important therapeutic target. Specifically, the DAG-sensing cysteine-rich conserved homology-1 (C1) domains of PKCs have emerged as promising targets for pharmaceutical modulation. Despite significant progress, the rational design of the C1 modulators remains challenging due to difficulties associated with structure determination of the C1-ligand complexes. Given the dearth of experimental structural data, computationally derived models have been instrumental in providing atomistic insight into the interactions of the C1 domains with PKC agonists. In this review, we provide an overview of the in silico approaches for seven classes of C1 modulators and outline promising future directions.
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Affiliation(s)
- Sachin Katti
- Department of Biochemistry and Biophysics, Texas A&M University, 300 Olsen Boulevard, College Station, TX, 77843, United States
| | - Tatyana I Igumenova
- Department of Biochemistry and Biophysics, Texas A&M University, 300 Olsen Boulevard, College Station, TX, 77843, United States.
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Liu X, Shi W, Xu L, Yang B, Liao S, Lan D, Wang W, Wang Y. Two-step enzymatic synthesis of α-linolenic acid-enriched diacylglycerols with high purities from silkworm pupae oil. Bioprocess Biosyst Eng 2020; 44:627-634. [PMID: 33159545 DOI: 10.1007/s00449-020-02471-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 10/23/2020] [Indexed: 11/30/2022]
Abstract
In this study, α-linolenic acid-enriched diacylglycerols (ALA-DAGs) were prepared via a two-step enzymatic way by combi-lipase using silkworm pupae oils as substrates. Firstly, several factors including temperature, mass ratio of water to oil, pH and enzyme loading were optimized for the hydrolysis of silkworm pupae oil. The maximum fatty acid content (96.51%) was obtained under the conditions: temperature 40 °C, water/oil 3:2 (w/w), pH 7, lipase TL100L loading 400 U/g, lipase PCL loading 30 U/g. Then, ALA was enriched by urea inclusion, with an increased ALA content of 82.50% being obtained. Secondly, the ALA-enriched silkworm pupae DAG oil (SPDO) was prepared by lipase PCL-catalyzed esterification reaction. After molecular distillation, the final SPDO product contained contents of DAGs (97.01%) and ALA (82.50%). This two-step enzymatic way for production of ALA-DAGs was successfully applied in a 100-fold scale-up reaction. Overall, our study provides a promising way for the preparation of ALA-DAGs.
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Affiliation(s)
- Xuan Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Wei Shi
- Sericultural and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510610, China
| | - Long Xu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Bo Yang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, 510006, China
| | - Sentai Liao
- Sericultural and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510610, China
| | - Dongming Lan
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Weifei Wang
- Sericultural and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510610, China.
| | - Yonghua Wang
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
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Rezk AM, Ibrahim IAAEH, Mahmoud MF, Mahmoud AAA. Quercetin and lithium chloride potentiate the protective effects of carvedilol against renal ischemia-reperfusion injury in high-fructose, high-fat diet-fed Swiss albino mice independent of renal lipid signaling. Chem Biol Interact 2020; 333:109307. [PMID: 33159969 DOI: 10.1016/j.cbi.2020.109307] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 10/12/2020] [Accepted: 10/28/2020] [Indexed: 12/19/2022]
Abstract
Renal ischemia-reperfusion injury (R-IRI) is the main cause of acute renal failure. Carvedilol has been shown to protect against R-IRI. However, the underlying mechanisms are still not completely clarified. This study aimed to investigate the role of lipid signaling in mediating carvedilol protective effects against R-IRI in insulin-resistant mice by using two different lipid signaling modulators, quercetin and lithium chloride (LiCl). Mice were fed high-fructose, high-fat diet (HFrHFD) for 16 weeks to induce insulin resistance. At the end of feeding period, mice were randomly distributed into five groups; Sham, R-IRI, Carvedilol (20 mg/kg, i.p.), Carvedilol + Quercetin (10 mg/kg, i.p.), Carvedilol + LiCl (200 mg/kg, i.p.). R-IRI was performed by applying 30 min of unilateral renal ischemia followed by one hour of reperfusion. Quercetin and LiCl were administered 30 min before carvedilol administration and carvedilol was administered 30 min before ischemia. Changes in kidney function tests, histopathology, fibrosis area, lipid signaling, inflammatory, apoptosis and oxidative stress markers in the kidney were measured. Results showed that R-IRI decreased kidney function, impaired renal tissue integrity, modulated lipid signaling and increased renal inflammation, apoptosis and oxidative stress. Carvedilol treatment decreased the detrimental effects induced by R-IRI. In addition, pre-injection of both quercetin and LiCl potentiated the reno-protective effects of carvedilol against R-IRI independent of changes in lipid mediators like phosphatidyl inositol 4,5 bisphosphate (PIP2) and diacylglycerol (DAG). In conclusion, quercetin and LiCl potentiate the protective effects of carvedilol against R-IRI in HFrHFD-fed mice by reducing inflammation and oxidative stress independent of lipid signaling.
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Affiliation(s)
- Asmaa M Rezk
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt; Department of Pharmacies, Benha University Hospitals, Benha, Egypt
| | - Islam A A E-H Ibrahim
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt.
| | - Mona F Mahmoud
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt
| | - Amr A A Mahmoud
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt
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You Y, Das J. Effect of ethanol on Munc13-1 C1 in Membrane: A Molecular Dynamics Simulation Study. Alcohol Clin Exp Res 2020; 44:1344-1355. [PMID: 32424866 DOI: 10.1111/acer.14363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Accepted: 05/06/2020] [Indexed: 12/26/2022]
Abstract
BACKGROUND EtOH has a significant effect on synaptic plasticity. Munc13-1 is an essential presynaptic active zone protein involved in priming the synaptic vesicle and releasing neurotransmitter in the brain. It is a peripheral membrane protein and binds to the activator, diacylglycerol (DAG)/phorbol ester at its membrane-targeting C1 domain. Our previous studies identified Glu-582 of C1 domain as the alcohol-binding residue (Das, J. et al, J. Neurochem., 126, 715-726, 2013). METHODS Here, we describe a 250 ns molecular dynamics (MD) simulation study on the interaction of EtOH and the activator-bound Munc13-1 C1 in the presence of varying concentrations of phosphatidylserine (PS). RESULTS In this study, Munc13-1 C1 shows higher conformational stability in EtOH than in water. It forms fewer hydrogen bonds with phorbol 13-acetate in the presence of EtOH than in water. EtOH also affected the interaction between the protein and the membrane and between the activator and the membrane. Similar studies in a E582A mutant suggest that these effects of EtOH are mostly mediated through Glu-582. CONCLUSIONS EtOH forms hydrogen bonds with Glu-582. While occupancy of the EtOH molecules at the vicinity (4Å) of Glu-582 is 34.4%, the occupancy in the E582A mutant is 26.5% of the simulation time. In addition, the amount of PS in the membrane influences the conformational stability of the C1 domain and interactions in the ternary complex. This study is important in providing the structural basis of EtOH's effects on synaptic plasticity.
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Affiliation(s)
- Youngki You
- From the Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, Texas
| | - Joydip Das
- From the Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, Texas
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Orive-Milla N, Delmulle T, de Mey M, Faijes M, Planas A. Metabolic engineering for glycoglycerolipids production in E. coli: Tuning phosphatidic acid and UDP-glucose pathways. Metab Eng 2020; 61:106-119. [PMID: 32492511 DOI: 10.1016/j.ymben.2020.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 05/04/2020] [Accepted: 05/25/2020] [Indexed: 12/12/2022]
Abstract
Glycolipids are target molecules in biotechnology and biomedicine as biosurfactants, biomaterials and bioactive molecules. An engineered E. coli strain for the production of glycoglycerolipids (GGL) used the MG517 glycolipid synthase from M. genitalium for glucosyl transfer from UDPGlc to diacylglycerol acceptor (Mora-Buyé et al., 2012). The intracellular diacylglycerol pool proved to be the limiting factor for GGL production. Here we designed different metabolic engineering strategies to enhance the availability of precursor substrates for the glycolipid synthase by modulating fatty acids, acyl donor and phosphatidic acid biosynthesis. Knockouts of tesA, fadE and fabR genes involved in fatty acids degradation, overexpression of the transcriptional regulator FadR, the acyltransferases PlsB and C, and the pyrophosphatase Cdh for phosphatidic acid biosynthesis, as well as the phosphatase PgpB for conversion to diacylglycerol were explored with the aim of improving GGL titers. Among the different engineered strains, the ΔtesA strain co-expressing MG517 and a fusion PlsCxPgpB protein was the best producer, with a 350% increase of GGL titer compared to the parental strain expressing MG517 alone. Attempts to boost UDPGlc availability by overexpressing the uridyltransferase GalU or knocking out the UDP-sugar diphosphatase encoding gene ushA did not further improve GGL titers. Most of the strains produced GGL containing a variable number of glucosyl units from mono-to tetra-saccharides. Interestingly, the strains co-expressing Cdh showed a shift in the GGL profile towards the diglucosylated lipid (up to 80% of total GGLs) whereas the strains with a fadR knockout presented a higher amount of unsaturated acyl chains. In all cases, GGL production altered the lipidic composition of the E. coli membrane, observing that GGL replace phosphatidylethanolamine to maintain the overall membrane charge balance.
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Affiliation(s)
- Nuria Orive-Milla
- Laboratory of Biochemistry, Institut Químic de Sarrià, University Ramon Llull, Via Augusta 350, E-08017, Barcelona, Spain
| | - Tom Delmulle
- Centre for Synthetic Biology (CSB), Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Marjan de Mey
- Centre for Synthetic Biology (CSB), Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Magda Faijes
- Laboratory of Biochemistry, Institut Químic de Sarrià, University Ramon Llull, Via Augusta 350, E-08017, Barcelona, Spain.
| | - Antoni Planas
- Laboratory of Biochemistry, Institut Químic de Sarrià, University Ramon Llull, Via Augusta 350, E-08017, Barcelona, Spain.
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Nishikawa H, Sasaki M, Nishiyama KI. In vitro Assay for Bacterial Membrane Protein Integration into Proteoliposomes. Bio Protoc 2020; 10:e3626. [PMID: 33659299 DOI: 10.21769/bioprotoc.3626] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 11/02/2022] Open
Abstract
It is important to experimentally determine how membrane proteins are integrated into biomembranes to unveil the roles of the integration factors, and to understand the functions and structures of membrane proteins. We have developed a reconstitution system for membrane protein integration in E. coli using purified factors, in which the integration reaction in vivo is highly reproducible. This system enabled not only analysis of membrane-embedded factors including glycolipid MPIase, but also elucidation of the detailed mechanisms underlying membrane protein integration. Using the system, the integration of membrane proteins can be evaluated in vitro through a protease-protection assay. We report here how to prepare (proteo)liposomes and to determine the activities of membrane protein integration.
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Affiliation(s)
- Hanako Nishikawa
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Japan
| | - Masaru Sasaki
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Japan
| | - Ken-Ichi Nishiyama
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Japan.,Department of Biological Chemistry and Food Sciences, Faculty of Agriculture, Iwate University, Morioka, Japan
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Liu Y, Wang B, Xu H, Ge W, Xie Y, Zhang M, Kong M, Fan W. Synergistic Effect of Diacylglycerol and Vitamin D in Ameliorating Dextran Sodium Sulfate-Induced Colitis in Rats. Lipids 2020; 55:585-598. [PMID: 32419184 DOI: 10.1002/lipd.12248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 04/29/2020] [Accepted: 04/29/2020] [Indexed: 11/09/2022]
Abstract
Vitamin D (VD) has the function of antibacteria and protect intestinal mucosa. Diacylglycerol has the property of dissolving VD, anti-bacterial, and antioxidant effects. The purpose of this study was to explore the potentially synergistic effects of diacylglycerol and VD in ameliorating dextran sodium sulfate-induced colitis in rats. A 2 × 3 factorial design was used in this experiment, consisting of two levels of VD (2.5 and 5 μg/day) crossed with three levels of duck oil diacylglycerol (0.5, 1, and 2 mL/day). The experiment lasted for 2 weeks. Compared with the colitis group, the physiological indexes were altered in colitis rats treated with diacylglycerol and VD, the concentrations of the pro-inflammatory indices were significantly reduced, the antioxidant enzyme activities were significantly increased, the diversity of caecal microflora was significantly increased. Besides, the expression of PPARγ was up-regulated while the expression of NF-κBp65 was downregulated. The changes of all those measures were toward those in the Healthy Control, and the mostly appropriate combination was 1 mL/day of diacylglycerol plus 2.5 μg/day VD.
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Affiliation(s)
- Yanan Liu
- Department of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Baowei Wang
- Department of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China.,National Waterfowl Industry Technical System Nutrition and Feed Function Laboratory, Qingdao, 266109, China
| | - Huixin Xu
- Department of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Wenhua Ge
- National Waterfowl Industry Technical System Nutrition and Feed Function Laboratory, Qingdao, 266109, China
| | - Yue Xie
- Department of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Mingai Zhang
- Department of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
| | - Min Kong
- National Waterfowl Industry Technical System Nutrition and Feed Function Laboratory, Qingdao, 266109, China
| | - Wenlei Fan
- Department of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, China
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Chang W, Fa H, Xiao D, Wang J. MicroRNA-184 alleviates insulin resistance in cardiac myocytes and high fat diet-induced cardiac dysfunction in mice through the LPP3/DAG pathway. Mol Cell Endocrinol 2020; 508:110793. [PMID: 32229289 DOI: 10.1016/j.mce.2020.110793] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/14/2020] [Accepted: 03/15/2020] [Indexed: 01/05/2023]
Abstract
AIM Cardiovascular complication is a major cause of mortality and morbidity in patients with diabetes. Insulin sensitivity loss is a major contributor to the pathogenesis of cardiovascular diseases in diabetes. Based on our previous research, diacylglycerol (DAG) levels play an important role in high saturated fatty acid-induced insulin resistance. Phosphatidic acid phosphatase (LPP3), a key enzyme for synthesizing DAG, is indispensable for normal cardiac functions and vascular health. However, adipose knockdown of LPP3 increases insulin sensitivity, suggesting that LPP3 regulation may be complicated in hearts. The aim of this study was to investigate LPP3 roles in diabetic cardiac insulin sensitivity and to identify potential upstream targets implicated in diabetic cardiomyopathy. METHODS AND RESULTS Mice were fed a high fat diet (HF) or a low fat diet (control) for up to 24 weeks. After 24 weeks, we found that high fat diet-induced cardiac dysfunction is linked to elevated LPP3 compared to the control group (P < 0.05). In addition, knockdown of LPP3 rescued the glucose uptake that was impaired by palmitate treatment alone in cardiomyoblasts (P < 0.05). Furthermore, we identified miR-184 as an upstream regulator targeting LPP3 and further confirmed the link between DAG and insulin sensitivity. MiR-184 mimic transfection rescued the glucose uptake and glucose consumption that had been impaired by palmitate treatment alone (P < 0.05). CONCLUSION In hearts of high fat diet-fed mice, increased LPP3 contributes to insulin resistance via increased DAG levels. A small non-coding RNA, miR-184, at least partially regulates this signal pathway to alleviate insulin resistance.
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Affiliation(s)
- Wenguang Chang
- Center for Regenerative Medicine, Institute for Translational Medicine, Qingdao University, Qingdao, 266021, China.
| | - Hongge Fa
- Center for Regenerative Medicine, Institute for Translational Medicine, Qingdao University, Qingdao, 266021, China; School of Basic Medical Sciences, Qingdao University, Qingdao, China
| | - Dandan Xiao
- Center for Regenerative Medicine, Institute for Translational Medicine, Qingdao University, Qingdao, 266021, China; School of Basic Medical Sciences, Qingdao University, Qingdao, China
| | - Jianxun Wang
- School of Basic Medical Sciences, Qingdao University, Qingdao, China
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Yang J, Qiu C, Li G, Lee WJ, Tan CP, Lai OM, Wang Y. Effect of diacylglycerol interfacial crystallization on the physical stability of water-in-oil emulsions. Food Chem 2020; 327:127014. [PMID: 32434126 DOI: 10.1016/j.foodchem.2020.127014] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 05/06/2020] [Accepted: 05/07/2020] [Indexed: 11/22/2022]
Abstract
The influence of diacylglycerol (DAG) combined with polyglycerol polyricinoleate (PGPR) on the stability of water-in-oil (W/O) emulsions containing hydrogenated palm oil (HPO) was studied. Polarized light microscope revealed that DAG promoted HPO to crystallize at the water-oil interface, providing the combination of Pickering and network stabilization effects. It was proposed that the molecular compatibility of fatty acids in DAG with HPO accounted for the promotional effect. The interfacial crystallization of DAG together with the surface activity of PGPR led to the formation of emulsions with uniform small droplets and high freeze-thaw stability. Further exploration of physical properties indicated that the combination of DAG and PGPR dramatically improved the emulsion's viscoelasticity and obtained a larger deformation yield. Water droplets in DAG-based emulsions acted as active fillers to improve the network rigidity. Therefore, DAG is a promising material to be used as emulsifier to enhance the physical stability of W/O emulsions.
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Mahadeo M, Prenner EJ. Differential impact of synthetic antitumor lipid drugs on the membrane organization of phosphatidic acid and diacylglycerol monolayers. Chem Phys Lipids 2020; 229:104896. [PMID: 32184083 DOI: 10.1016/j.chemphyslip.2020.104896] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 02/19/2020] [Accepted: 03/11/2020] [Indexed: 12/16/2022]
Abstract
Anti-tumour lipids are synthetic analogues of lysophosphatidylcholine. These drugs are both cytotoxic and cytostatic, and more interestingly, exert these effects preferentially in tumour cells. While the exact mechanism of action isn't fully elucidated, these drugs appear to preferentially partition into rigid lipid domains in cell membranes. Upon insertion, the compounds alter membrane domain organization, disrupt normal signal transduction, and cause cell death. Recently, it has been reported that these drugs induce accumulation of diacylglycerol in yeast cells which in turn sensitizes cells to the drugs. Conversely, phosphatidic acid accumulation appears to protect cells against the drugs. In the current work, the aim was to compare the biophysical effects of the drugs edelfosine, miltefosine and perifosine on monolayers of dimyristoyl phosphatidic acid, dimyristoyl glycerol and an equimolar mixture, to understand how these lipids modulate the mode of action. Surface pressure - area isotherms, compression moduli and Brewster angle microscopy were used to compare drug effects on lipid packing, monolayer compressibility and lateral domain organization of these films. Results suggest that edelfosine and miltefosine have stabilizing effects on all of the monolayers, while perifosine destabilizes dimyristoyl glycerol and the equimolar mixture. Additionally, all three drugs change the morphology of the domains observed. Based on these results the stabilization of diacylgylcerol by edelfosine and miltefosine may contribute to the mode of action as diacylglycerol is a known disruptor of bilayers. Perifosine however does not stabilize diacylglycerol, and therefore cell death may occur through a more direct inhibition of specific signal transduction. These results suggest that perifosine may illicit cytotoxicity through a different mechanism compared to the other antitumor lipid drugs.
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Søgaard D, Baranowski M, Dela F, Helge JW. The Influence of Age and Cardiorespiratory Fitness on Bioactive Lipids in Muscle. J Gerontol A Biol Sci Med Sci 2020; 74:778-786. [PMID: 30252030 DOI: 10.1093/gerona/gly214] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Indexed: 01/21/2023] Open
Abstract
Reduced insulin sensitivity is observed with aging and often explained by decreased physical activity. The mechanisms involved are not clarified, but bioactive lipids may play a role. We aimed to evaluate the influence of age and cardiorespiratory fitness on ceramide and diacylglycerol content in muscle and key proteins in lipid metabolism and insulin signaling. Healthy males were stratified by age into trained and untrained groups including 27 young (23.2 ± 0.3 years) and 33 aged (65.2 ± 0.6 years). Maximal oxygen uptake and body composition were measured and fasting blood samples and muscle biopsies obtained. Muscle ceramide and diacylglycerol were determined by thin-layer and gas-liquid chromatography and proteins by western blotting. We show that HOMA-IR was higher and VO2 peak lower in aged compared with young. Total, saturated, C16:0 and C18:0 ceramide content were lower in muscle from aged compared with young. Intramuscular C18:1n9 and C20:4n6 content were higher in trained versus untrained. Content of total unsaturated and C16:1n7 diacylglycerol fatty acids were higher and C24:0 lower in muscle of aged versus young. Cardiorespiratory fitness had no impact on total diacylglycerol content. In conclusion, these data argue against intramuscular ceramide or diacylglycerol accumulation as driver of age-related insulin resistance in lean individuals.
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Affiliation(s)
- Ditte Søgaard
- Xlab, Centre of Healthy Aging, Department of Biomedical Sciences, University of Copenhagen, Denmark
| | | | - Flemming Dela
- Xlab, Centre of Healthy Aging, Department of Biomedical Sciences, University of Copenhagen, Denmark.,Department of Geriatrics, Bispebjerg University Hospital, Copenhagen, Denmark
| | - Jørn Wulff Helge
- Xlab, Centre of Healthy Aging, Department of Biomedical Sciences, University of Copenhagen, Denmark
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Ranganathan PR, Nawada N, Narayanan AK, Rao DKV. Triglyceride deficiency and diacylglycerol kinase1 activity lead to the upregulation of mevalonate pathway in yeast: A study for the development of potential yeast platform for improved production of triterpenoid. Biochim Biophys Acta Mol Cell Biol Lipids 2020; 1865:158661. [PMID: 32058036 DOI: 10.1016/j.bbalip.2020.158661] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 02/05/2020] [Accepted: 02/07/2020] [Indexed: 12/19/2022]
Abstract
Besides energy storage and membrane biogenesis, lipids are known for their numerous biological functions. The two essential lipids, diacylglycerol (DG) and phosphatidic acid (PA), are shown to be associated with cell signalling processes. In this study, we examined whether triglyceride-deficient yeast mutants (tgΔ), dga1Δ and dga1Δlro1Δ, may play an important role in mevalonate (MEV) pathway regulation. Our metabolite analyses revealed that tgΔ cells showed high levels of squalene (SQ) and ergosterol (ERG), which are key indicators of MEV pathway activity. In addition, gene expression studies indicated that the MEV pathway genes in tgΔ cells were significantly upregulated. Interestingly, tgΔ cells exhibited high diacylglycerol kinase1 (DGK1) expression. Furthermore, DGK1 overexpression in WT and tgΔ phenotypes causes a substantial elevation in SQ and ERG levels, and we also found a significant increase in transcript levels of MEV pathway genes, confirming the new role of DGK1 in MEV pathway regulation. This suggests that high DG phosphorylation activity increases the PA pool that may induce the upregulation of MEV pathway in tgΔ cells. The induced MEV pathway is one of the key strategies in the field of synthetic biology for improved production of terpenoids in yeast. Thus, to examine whether increased endogenous MEV pathway flux can be redirected to triterpenoid, β-Amyrin synthase gene was heterologously expressed in DGK1 overexpressing tgΔ cells that led to significant production of β-Amyrin, a natural triterpenoid. In conclusion, our findings provide a novel strategy to increase MEV pathway precursors by modulating endogenous signal lipids for improved production of terpenoids.
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Affiliation(s)
- Poornima Ramani Ranganathan
- Biochemistry Laboratory, CSIR-Central Institute of Medicinal & Aromatic Plants, Research Center, Allalasandra, GKVK (post), Bangalore 560065, India; Academy of Scientific and Innovative Research (AcSIR), Sector 19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201 002, India
| | - Niveditha Nawada
- Biochemistry Laboratory, CSIR-Central Institute of Medicinal & Aromatic Plants, Research Center, Allalasandra, GKVK (post), Bangalore 560065, India
| | - Ananth Krishna Narayanan
- Biochemistry Laboratory, CSIR-Central Institute of Medicinal & Aromatic Plants, Research Center, Allalasandra, GKVK (post), Bangalore 560065, India
| | - D K Venkata Rao
- Biochemistry Laboratory, CSIR-Central Institute of Medicinal & Aromatic Plants, Research Center, Allalasandra, GKVK (post), Bangalore 560065, India; Academy of Scientific and Innovative Research (AcSIR), Sector 19, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201 002, India.
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