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Naghdi A, Oska N, Yumnamcha T, Eltanani S, Shawky M, Me R, Ibrahim AS. The significance of upper glycolytic components in regulating retinal pigment epithelial cellular behavior. Sci Rep 2024; 14:18862. [PMID: 39143171 PMCID: PMC11324787 DOI: 10.1038/s41598-024-68343-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 07/22/2024] [Indexed: 08/16/2024] Open
Abstract
Cell adhesion to the extracellular matrix and its natural outcome of cell spreading, along with the maintenance of barrier activity, are essential behaviors of epithelial cells, including retinal pigment epithelium (RPE). Disruptions in these characteristics can result in severe vision-threatening diseases such as diabetic macular edema and age-related macular degeneration. However, the precise mechanisms underlying how RPE cells regulate their barrier integrity and cell spreading are not fully understood. This study aims to elucidate the relative importance of upper glycolytic components in governing these cellular behaviors of RPE cells. Electric Cell-Substrate Impedance Sensing (ECIS) technology was utilized to assess in real-time the effects of targeting various upper glycolytic enzymes on RPE barrier function and cell spreading by measuring cell resistance and capacitance, respectively. Specific inhibitors used included WZB117 for Glut1 inhibition, Lonidamine for Hexokinase inhibition, PFK158 for PFKFB3/PFK axis inhibition, and TDZD-8 for Aldolase inhibition. Additionally, the viability of RPE cells was evaluated using a lactate dehydrogenase (LDH) cytotoxicity assay. The most significant decrease in electrical resistance and increase in capacitance of RPE cells were observed due to dose-dependent inhibition of Glut1 using WZB117, as well as Aldolase inhibition with TDZD-8. LDH level analysis at 24-72 h post-treatment with WZB117 (1 and 10 μM) or TDZD-8 (1 μM) showed no significant difference compared to the control, indicating that the disruption of RPE functionality was not attributed to cell death. Lastly, inhibition of other upper glycolytic components, including PFKFB3/PFK with PFK158 or Hexokinase with Lonidamine, did not significantly affect RPE cell behavior. This study provides insights into the varied roles of upper glycolytic components in regulating the functionality of RPE cells. Specifically, it highlights the critical roles of Glut1 and Aldolase in preserving barrier integrity and promoting RPE cell adhesion and spreading. Such understanding will guide the development of safe interventions to treat RPE cell dysfunction in various retinal disorders.
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Affiliation(s)
- Armaan Naghdi
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, 540 East Canfield, Gordon Scott Hall (Room 7133), Detroit, MI, 48201, USA
| | - Nicole Oska
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, 540 East Canfield, Gordon Scott Hall (Room 7133), Detroit, MI, 48201, USA
| | - Thangal Yumnamcha
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, 540 East Canfield, Gordon Scott Hall (Room 7133), Detroit, MI, 48201, USA
| | - Shaimaa Eltanani
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, 540 East Canfield, Gordon Scott Hall (Room 7133), Detroit, MI, 48201, USA
| | - Mohamed Shawky
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, 540 East Canfield, Gordon Scott Hall (Room 7133), Detroit, MI, 48201, USA
- Department of Biochemistry, Faculty of Pharmacy, Horus University, New Damietta City, Egypt
| | - Rao Me
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, 540 East Canfield, Gordon Scott Hall (Room 7133), Detroit, MI, 48201, USA
- Kresge Eye Institute, Wayne State University, Detroit, MI, USA
| | - Ahmed S Ibrahim
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, 540 East Canfield, Gordon Scott Hall (Room 7133), Detroit, MI, 48201, USA.
- Department of Biochemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt.
- Department of Pharmacology, Wayne State University, Detroit, MI, USA.
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Oska N, Eltanani S, Shawky M, Naghdi A, Gregory A, Yumnamcha T, Ibrahim AS. Upper glycolytic components contribute differently in controlling retinal vascular endothelial cellular behavior: Implications for endothelial-related retinal diseases. PLoS One 2023; 18:e0294909. [PMID: 38033124 PMCID: PMC10688887 DOI: 10.1371/journal.pone.0294909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 11/10/2023] [Indexed: 12/02/2023] Open
Abstract
BACKGROUND Retinal degenerative diseases such as diabetic retinopathy and diabetic macular edema are characterized by impaired retinal endothelial cells (RECs) functionality. While the role of glycolysis in glucose homeostasis is well-established, its contributions to REC barrier assembly and cell spreading remain poorly understood. This study aimed to investigate the importance of upper glycolytic components in regulating the behavior of human RECs (HRECs). METHODS Electric cell-substrate impedance sensing (ECIS) technology was employed to analyze the real-time impact of various upper glycolytic components on maintaining barrier functionality and cell spreading of HRECs by measuring cell resistance and capacitance, respectively. Specific inhibitors were used: WZB117 to inhibit Glut1/3, lonidamine to inhibit hexokinases, PFK158 to inhibit the PFKFB3-PFK axis, and TDZD-8 to inhibit aldolases. Additionally, the viability of HRECs was evaluated using the lactate dehydrogenase (LDH) cytotoxicity assay. RESULTS The most significant reduction in electrical resistance and increase in capacitance of HRECs resulted from the dose-dependent inhibition of PFKFB3/PFK using PFK158, followed by aldolase inhibition using TDZD-8. LDH level analysis at 24- and 48-hours post-treatment with PFK158 (1 μM) or TDZD-8 (1 and 10 μM) showed no significant difference compared to the control, indicating that the disruption of HRECs functionality was not attributed to cell death. Conversely, inhibiting Glut1/3 with WZB117 had minimal impact on HREC behavior, except at higher concentrations (10 μM) and prolonged exposure. Lastly, inhibiting hexokinase with lonidamine did not noticeably alter HREC cell behavior. CONCLUSION This study illustrates the unique impacts of components within upper glycolysis on HREC functionality, emphasizing the crucial role of the PFKFB3/PFK axis in regulating HREC behavior. Understanding the specific contributions of each glycolytic component in preserving normal REC functionality will facilitate the development of targeted interventions for treating endothelial cell dysfunction in retinal disorders while minimizing effects on healthy cells.
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Affiliation(s)
- Nicole Oska
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, United States of America
| | - Shaimaa Eltanani
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, United States of America
| | - Mohamed Shawky
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, United States of America
- Department of Biochemistry, Faculty of Pharmacy, Horus University, New Damietta, Egypt
| | - Armaan Naghdi
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, United States of America
| | - Andrew Gregory
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, United States of America
| | - Thangal Yumnamcha
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, United States of America
| | - Ahmed S. Ibrahim
- Department of Ophthalmology, Visual, and Anatomical Sciences, School of Medicine, Wayne State University, Detroit, MI, United States of America
- Department of Biochemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
- Department of Pharmacology, School of Medicine, Wayne State University, Detroit, MI, United States of America
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Dong X, Wan Y, Chen Y, Wu X, Zhang Y, Deng M, Cai W, Wu X, Fu G. Molecular mechanism of high-production tannase of Aspergillus carbonarius NCUF M8 after ARTP mutagenesis: revealed by RNA-seq and molecular docking. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:4054-4064. [PMID: 34997579 DOI: 10.1002/jsfa.11754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 12/24/2021] [Accepted: 01/08/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Tannase is an enzyme produced by microbial fermentation and is widely used in the food industry; however, the molecular mechanism of tannase production by Aspergillus has not yet been studied. This study was conducted to reveal the differences in Aspergillus carbonarius tannase enzymatic characterization, secondary structures and molecular mechanisms after treatment of the strain with atmospheric and room temperature plasma (ARTP). RESULTS The results showed that the specific activity of tannase was improved by ARTP treatment, and it showed higher thermostability and tolerance to metal ions and additives. The enzymatic characterization and molecular docking results indicated that tannase had a higher affinity and catalytic rate with tannic acid as a substrate after ARTP treatment. In addition, the docking results indicated that Aspergillus tannases may catalyze tannic acid by forming two hydrogen-bonding networks with neighboring residues. RNA-seq analysis indicated that changes in steroid biosynthesis, glutathione metabolism, glycerolipid metabolism, oxidative phosphorylation pathway and mitogen-activated protein kinase signaling pathways might be crucial reasons for the high production of tannase. CONCLUSION ARTP enhanced the yield and properties of A. carbonarius tannase by changing the enzyme structure and cell metabolism. This study provides a theoretical basis for elucidating the molecular mechanism underlying high production of Aspergillus tannases. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Xianxian Dong
- State Key Laboratory of Food Science and Technology and College of Food Science and Technology, Nanchang University, Nanchang, China
| | - Yin Wan
- State Key Laboratory of Food Science and Technology and College of Food Science and Technology, Nanchang University, Nanchang, China
| | - Yanru Chen
- State Key Laboratory of Food Science and Technology and College of Food Science and Technology, Nanchang University, Nanchang, China
| | - Xiaojiang Wu
- State Key Laboratory of Food Science and Technology and College of Food Science and Technology, Nanchang University, Nanchang, China
| | - Yulong Zhang
- State Key Laboratory of Food Science and Technology and College of Food Science and Technology, Nanchang University, Nanchang, China
| | - Mengfei Deng
- State Key Laboratory of Food Science and Technology and College of Food Science and Technology, Nanchang University, Nanchang, China
| | - Wenqin Cai
- State Key Laboratory of Food Science and Technology and College of Food Science and Technology, Nanchang University, Nanchang, China
| | - Xiaodan Wu
- State Key Laboratory of Food Science and Technology and College of Food Science and Technology, Nanchang University, Nanchang, China
| | - Guiming Fu
- State Key Laboratory of Food Science and Technology and College of Food Science and Technology, Nanchang University, Nanchang, China
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