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Mathakala V, Muppuru MK, Palempalli UMD. Halophila beccarii extract ameliorate glucose uptake in 3T3-L1 adipocyte cells and improves glucose homeostasis in streptozotocin-induced diabetic rats. Heliyon 2022; 8:e10252. [PMID: 36042748 PMCID: PMC9420365 DOI: 10.1016/j.heliyon.2022.e10252] [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: 09/26/2021] [Revised: 11/20/2021] [Accepted: 08/05/2022] [Indexed: 11/28/2022] Open
Abstract
The regulation of carbohydrate metabolizing enzymes is an effective way of reducing blood glucose levels and improving glycogen synthesis during the management of type 2 diabetes. The present investigation was conducted to explain the detailed mechanism with which a Seagrass, Halophila beccarii extract (HBE) enhances the glucose uptake in the 3T3-L1 adipocyte cell culture system in invitro. HBE stimulates the glucose uptake by the translocation of glucose transporter 4 (GLUT4) on to plasma cell membrane through induction of insulin receptor substrate 1 (IRS-1)/protein kinase B (Akt) signaling pathways. To assess the effect of HBE on T2DM, we used invivo experimental diabetes rat models induced with streptozotocin (STZ) to perform oral GTT and ITT. Furthermore, we assessed the enzymatic profile of Glycolysis, Pentose phosphate pathway, and gluconeogenesis from liver tissue homogenate. After long-term exposure with HBE, our results confirmed, that HBE improves the glucose uptake in 3T3-L1 cell lines by up-regulation of glucose transporter type 4 (GLUT4) through uptake of glucose by the adipocytes. The resulting data indicated that HBE had a great potentiality in preventing diabetes and maintaining glucose homeostasis through improving glucose uptake. The present data also showed that HBE with its insulin mimetic activity activates glycogen synthesis and enhances glucose utilization by regulating the carbohydrate metabolic enzymes. The similarity between HBE and insulin indicates that the HBE follows the mechanisms same as the insulin signaling pathway to show the antidiabetic activity.
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Affiliation(s)
- Vani Mathakala
- Department of Applied Microbiology and Biochemistry, Sri Padmavati Mahila Visva vidyalayam, Tirupati, AP, India
| | - Muni Kesavulu Muppuru
- Department of Biosciences, Mohanbabu University, Sree Vidyanikethan Engineering college, Sree Sainath Nagar, Tirupati, AP, India
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Chang YJ, Kang Z, Bei J, Chou SJ, Lu MJ, Su YL, Lin SW, Wang HH, Lin S, Chang CJ. Generation of TRIM28 Knockout K562 Cells by CRISPR/Cas9 Genome Editing and Characterization of TRIM28-Regulated Gene Expression in Cell Proliferation and Hemoglobin Beta Subunits. Int J Mol Sci 2022; 23:6839. [PMID: 35743282 DOI: 10.3390/ijms23126839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/14/2022] [Accepted: 06/16/2022] [Indexed: 12/10/2022] Open
Abstract
TRIM28 is a scaffold protein that interacts with DNA-binding proteins and recruits corepressor complexes to cause gene silencing. TRIM28 contributes to physiological functions such as cell growth and differentiation. In the chronic myeloid leukemia cell line K562, we edited TRIM28 using CRISPR/Cas9 technology, and the complete and partial knockout (KO) cell clones were obtained and confirmed using quantitative droplet digital PCR (ddPCR) technology. The amplicon sequencing demonstrated no off-target effects in our gene editing experiments. The TRIM28 KO cells grew slowly and appeared red, seeming to have a tendency towards erythroid differentiation. To understand how TRIM28 controls K562 cell proliferation and differentiation, transcriptome profiling analysis was performed in wild-type and KO cells to identify TRIM28-regulated genes. Some of the RNAs that encode the proteins regulating the cell cycle were increased (such as p21) or decreased (such as cyclin D2) in TRIM28 KO cell clones; a tumor marker, the MAGE (melanoma antigen) family, which is involved in cell proliferation was reduced. Moreover, we found that knockout of TRIM28 can induce miR-874 expression to downregulate MAGEC2 mRNA via post-transcriptional regulation. The embryonic epsilon-globin gene was significantly increased in TRIM28 KO cell clones through the downregulation of transcription repressor SOX6. Taken together, we provide evidence to demonstrate the regulatory network of TRIM28-mediated cell growth and erythroid differentiation in K562 leukemia cells.
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Fu L, Yang F, Hu Y, Li Y, Chen S, Luo W. Discrepant roles of adsorbed OH* species on IrWO x for boosting alkaline hydrogen electrocatalysis. Sci Bull (Beijing) 2020; 65:1735-1742. [PMID: 36659246 DOI: 10.1016/j.scib.2020.06.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 02/26/2020] [Revised: 06/02/2020] [Accepted: 06/04/2020] [Indexed: 01/21/2023]
Abstract
Improving the slow kinetics of alkaline hydrogen electrode reactions, involving hydrogen oxidation and evolution reactions (HOR/HER) is highly desirable for accelerating the commercialization of alkaline exchange membrane-based fuel cells (AEMFCs) and water electrolyzers (AEMWEs). However, fundamental understanding of the mechanism for HOR/HER catalysis under alkaline media is still debatable. Here we develop an amorphous tungsten oxide clusters modified iridium-tungsten nanocrystallines (IrWOx) which exhibited by far the highest exchange current density and mass activity, about three times higher than the commercial Pt/C toward alkaline HOR/HER. Density functional theory (DFT) calculations reveal the WOx clusters act as a pivotal role to boost reversible hydrogen electrode reactions in alkaline condition but via different mechanisms, which are, hydrogen binding energy (HBE) mechanism for HOR and bi-functional mechanism for HER. This work is expected to promote our fundamental understanding about the alkaline HOR/HER catalysis and provide a new avenue for rational design of highly efficient electrocatalysts toward HOR/HER under alkaline electrolytes.
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Affiliation(s)
- Luhong Fu
- Hubei Electrochemical Power Sources Key Laboratory, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Fulin Yang
- Hubei Electrochemical Power Sources Key Laboratory, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Youcheng Hu
- Hubei Electrochemical Power Sources Key Laboratory, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Yunbo Li
- Hubei Electrochemical Power Sources Key Laboratory, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Shengli Chen
- Hubei Electrochemical Power Sources Key Laboratory, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Wei Luo
- Hubei Electrochemical Power Sources Key Laboratory, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China; Suzhou Institute of Wuhan University, Suzhou 215123, China.
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Bajko J, Duguid M, Altmann S, Hurlbut GD, Kaczmarek JS. Pendrin stimulates a chloride absorption pathway to increase CFTR-mediated chloride secretion from Cystic Fibrosis airway epithelia. FASEB Bioadv 2020; 2:526-537. [PMID: 32923987 PMCID: PMC7475303 DOI: 10.1096/fba.2020-00012] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 03/24/2020] [Accepted: 06/26/2020] [Indexed: 01/04/2023] Open
Abstract
Cystic Fibrosis (CF), an inherited multi-system disease, is caused by mutations in the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) that disrupt its ability to secrete anions from epithelia. Recovery of functional anion secretion may be curative for CF, so different components of the ion transport machinery have become attractive therapeutic targets. Several members of the SLC26 ion transporter family have been linked to epithelial ion flux, some through putative functional interactions with CFTR. Using a small-scale qPCR screen, we confirmed that the anion transporter SLC26A4 (pendrin) is downregulated in CF. Upregulation of pendrin using interleukins IL-4 or IL-13 increased Cl- secretion through CFTR in human bronchial epithelial cell (HBEC) derived epithelia differentiated in vitro and measured in the Ussing Chamber. Inhibition or knockdown of pendrin prevented this increased secretion. Increased CFTR activity was not driven by increases in CFTR protein or upstream regulatory pathway components. When basolateral Cl- absorption through NKCC1 was inhibited, a pendrin-dependent Cl- absorption pathway allowing CFTR to continue secreting Cl- from the epithelium was revealed. Although CFTR is often considered the bottleneck in the transepithelial Cl- transport pathway, these studies indicate that basolateral Cl- permeability becomes limiting as CFTR activity increases. Therefore, an increase of epithelial Cl- absorption via pendrin might have additional therapeutic benefit in combination with CFTR modulators.
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Zhou H, Liu Y, Wang Z, Yang Y, Li M, Yuan D, Zhang X, Li Y. CD147 Promoted Epithelial Mesenchymal Transition in Airway Epithelial Cells Induced by Cigarette Smoke via Oxidative Stress Signaling Pathway. COPD 2020; 17:269-279. [PMID: 32366134 DOI: 10.1080/15412555.2020.1758051] [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] [Indexed: 12/20/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is a common airway disease, and epithelial mesenchymal transition (EMT) is participated in the pathogenesis of COPD. However, the role of CD147 in COPD remains largely unknown. In order to clarify the role of CD147 in EMT induced by cigarette smoke, we established animal and cell model of EMT by mean of cigarette smoke exposure and detected the expressions of CD147 and EMT markers via PCR, WB and IF. RNA inference was applied to study the role of CD147 in CSE induced EMT in vitro. NAC and H2O2 were used to study oxidative stress signaling pathway in this model. As a result, cigarette smoke exposure upregulated the expressions of CD147, α-SMA, and Vimentin and downregulated the expression of Ecadherin and ZO1 both in vivo and in vitro, which was accompanied by augmented level of oxidative stress. CD147 knockdown would partly inhibit CSE induced EMT, while preincubation of H2O2 could inverse this effect. In conclusion, CD147 promoted EMT in mice and HBE cells induced by cigarette smoke via oxidative stress signaling pathway.
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Affiliation(s)
- Hongbin Zhou
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, P.R. China
| | - Yuanshun Liu
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, P.R. China
| | - Zhehua Wang
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, P.R. China
| | - Yang Yang
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, P.R. China
| | - Mengyu Li
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, P.R. China
| | - Dong Yuan
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, P.R. China
| | - Xiaoqin Zhang
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, P.R. China
| | - Yaqing Li
- Department of Respiratory Medicine, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, P.R. China.,Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Hangzhou, Zhejiang, P.R. China
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Kubickova B, Laboha P, Hildebrandt JP, Hilscherová K, Babica P. Effects of cylindrospermopsin on cultured immortalized human airway epithelial cells. Chemosphere 2019; 220:620-628. [PMID: 30597370 DOI: 10.1016/j.chemosphere.2018.12.157] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 07/02/2018] [Revised: 12/19/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
Anthropogenic eutrophication of freshwater bodies increases the occurrence of toxic cyanobacterial blooms. The cyanobacterial toxin cylindrospermopsin (CYN) is detected in the environment with increasing frequency, driving the scientific effort to assess emerging health risks from CYN-producing blooms. Oral exposure to CYN results primarily in hepatotoxicity. Nevertheless, extrahepatic manifestations of CYN toxicity have been reported. Furthermore, cyanotoxins have been detected in aerosols and dust particles, suggesting potential toxic effects in the respiratory tract. To assess the susceptibility of airway epithelia towards cyanotoxins, monolayers of immortalized human bronchial epithelial cells HBE1 and 16HBE14o- were exposed to a concentration range of 0.1-10 μM CYN. Cytotoxic endpoints were assessed as morphologic alterations, resazurin reduction capacity, esterase activity, neutral red uptake, and by impedimetric real-time cell analysis. Depending on the endpoint assessed, EC50 values ranged between 0.7 and 1.8 μM (HBE1) and 1.6-4.8 μM (16HBE14o-). To evaluate alterations of other cellular events by subcytotoxic concentration of CYN (1 μM), phosphorylation of mitogen-activated protein kinases ERK and p38 was determined. Only a slight increase in p38 phosphorylation was induced by CYN in HBE1 cell line after 48 h, while activities of both ERK1/2 and p38 gradually and significantly increased in 16HBE14o- cells during 8-48 h exposure. This study suggests possible hazards of inhalation CYN exposures, which may severely impact the integrity of airway epithelia and epithelial cell signaling. Further research of CYN-induced toxicity and underlying mechanisms is needed, as well as more data on environmental concentrations of cyanotoxins in aerosols for exposure assessment.
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Affiliation(s)
- Barbara Kubickova
- Masaryk University, Faculty of Science, RECETOX, Kamenice 753/5, 625 00 Brno, Czech Republic.
| | - Petra Laboha
- Masaryk University, Faculty of Science, RECETOX, Kamenice 753/5, 625 00 Brno, Czech Republic.
| | - Jan-Peter Hildebrandt
- University of Greifswald, Zoological Institute and Museum, Department of Animal Physiology and Biochemistry, Felix-Hausdorff-Str. 1, 17489 Greifswald, Germany.
| | - Klara Hilscherová
- Masaryk University, Faculty of Science, RECETOX, Kamenice 753/5, 625 00 Brno, Czech Republic.
| | - Pavel Babica
- Masaryk University, Faculty of Science, RECETOX, Kamenice 753/5, 625 00 Brno, Czech Republic.
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Tan S, Zhao S, Chen Z, Ma Q, Wang W, Cheng S, Wen Q, Tan S, Xie J. Altered Biological Properties in Dp71 Over-Expressing HBE Cells. Cell Physiol Biochem 2017; 43:2022-2036. [PMID: 29059680 DOI: 10.1159/000484181] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 03/22/2017] [Accepted: 09/15/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS In order to further characterize the biological traits of Dp71, HBE over expressing two most abundantly expressed Dp71 spliced isoforms, Dp71d and Dp71f, were established and their biological traits were explored. METHODS The proliferation, migration and invasion capabilities of HBE-Dp71d and HBE-Dp71f cells were evaluated by MTT, colony formation, transwell and scratch assay. Cell cycle and apoptosis induced by H2O2 were measured by flow cytometer. Co-IP was performed to prove the interaction between lamin B1, FAK and Dp71. Western blot was performed to detect lamin B1, FAK, ERK and Cyclin D expression in HBE-Dp71d and HBE-Dp71f cells. RESULTS HBE-Dp71d and HBE-Dp71f cells proliferated faster than their mock and blank controls; shortened their G0/G1 phase; enhanced their invasion and migration capabilities; reduced their apoptosis induced by H2O2. Co-IP proved Dp71 directly interacting with focal adhesion kinase (FAK) and lamin B1 in HBE cells. Increased lamin B1, FAK mRNA and protein expression, over activation of integrin/focal adhesion kinase/extracellular signal-regulated kinase (ERK)/cyclin D pathway were observed in HBE-Dp71d and HBE-Dp71f cells. CONCLUSIONS Via increasing FAK in the cytoplasmic FAK-Dp71 , lamin B1 of nucleus laminB1-Dp71 complex, HBE-Dp71d and HBE-Dp71f cells alter their proliferation, migration, invasion, cell cycle and apoptosis rate induced by H2O2.
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Affiliation(s)
- Sipin Tan
- Laboratory of Shock, Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
| | - Shuai Zhao
- Laboratory of Shock, Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China.,Department of Pathology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - Zhikang Chen
- Department of General Surgery. Xiangya Hospital, Central South University, Changsha, China
| | - Qiongshang Ma
- Department of Microbiology, Xiangya School of Medicine, Central South University, Changsha, China
| | - Wenmei Wang
- Laboratory of Shock, Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
| | - Shuhua Cheng
- Laboratory of Shock, Department of Pathophysiology, Xiangya School of Medicine, Central South University, Changsha, China
| | - Qiaocheng Wen
- Department of General Surgery. Xiangya Hospital, Central South University, Changsha, China
| | - Sichuang Tan
- Department of Thoracic Surgery, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Jinliang Xie
- Center of Transplant Surgery, Xiangya Hospital, Central South University, Changsha, China
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