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Brandão F, Costa C, Bessa MJ, Valdiglesias V, Hellack B, Haase A, Fraga S, Teixeira JP. Multiparametric in vitro genotoxicity assessment of different variants of amorphous silica nanomaterials in rat alveolar epithelial cells. Nanotoxicology 2023; 17:511-528. [PMID: 37855675 DOI: 10.1080/17435390.2023.2265481] [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: 03/01/2023] [Accepted: 09/20/2023] [Indexed: 10/20/2023]
Abstract
The hazard posed to human health by inhaled amorphous silica nanomaterials (aSiO2 NM) remains uncertain. Herein, we assessed the cyto- and genotoxicity of aSiO2 NM variants covering different sizes (7, 15, and 40 nm) and surface modifications (unmodified, phosphonate-, amino- and trimethylsilyl-modified) on rat alveolar epithelial (RLE-6TN) cells. Cytotoxicity was evaluated at 24 h after exposure to the aSiO2 NM variants by the lactate dehydrogenase (LDH) release and WST-1 reduction assays, while genotoxicity was assessed using different endpoints: DNA damage (single- and double-strand breaks [SSB and DSB]) by the comet assay for all aSiO2 NM variants; cell cycle progression and γ-H2AX levels (DSB) by flow cytometry for those variants that presented higher cytotoxic and DNA damaging potential. The variants with higher surface area demonstrated a higher cytotoxic potential (SiO2_7, SiO2_15_Unmod, SiO2_15_Amino, and SiO2_15_Phospho). SiO2_40 was the only variant that induced significant DNA damage on RLE-6TN cells. On the other hand, all tested variants (SiO2_7, SiO2_15_Unmod, SiO2_15_Amino, and SiO2_40) significantly increased total γ-H2AX levels. At high concentrations (28 µg/cm2), a decrease in G0/G1 subpopulation was accompanied by a significant increase in S and G2/M sub-populations after exposure to all tested materials except for SiO2_40 which did not affect cell cycle progression. Based on the obtained data, the tested variants can be ranked for its genotoxic DNA damage potential as follows: SiO2_7 = SiO2_40 = SiO2_15_Unmod > SiO2_15_Amino. Our study supports the usefulness of multiparametric approaches to improve the understanding on NM mechanisms of action and hazard prediction.
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Affiliation(s)
- Fátima Brandão
- Department of Environmental Health, National Institute of Health Dr. Ricardo Jorge, Porto, Portugal
- EPIUnit-Institute of Public Health, University of Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Carla Costa
- Department of Environmental Health, National Institute of Health Dr. Ricardo Jorge, Porto, Portugal
- EPIUnit-Institute of Public Health, University of Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
| | - Maria João Bessa
- Department of Environmental Health, National Institute of Health Dr. Ricardo Jorge, Porto, Portugal
- EPIUnit-Institute of Public Health, University of Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
- Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal
| | - Vanessa Valdiglesias
- Departamento de Biología, Universidade da Coruña, Grupo NanoToxGen, Centro Interdisciplinar de Química e Bioloxía - CICA, A Coruña, Spain
- Instituto de Investigación Biomédica de A Coruña (INIBIC), A Coruña, Spain
| | - Bryan Hellack
- Institute of Energy and Environmental Technology (IUTA) e.V, Duisburg, Germany
- German Environment Agency (UBA), Dessau, Germany
| | - Andrea Haase
- Department of Chemical and Product Safety, German Federal Institute for Risk Assessment (BfR), Berlin, Germany
| | - Sónia Fraga
- Department of Environmental Health, National Institute of Health Dr. Ricardo Jorge, Porto, Portugal
- EPIUnit-Institute of Public Health, University of Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
- Department of Biomedicine, Unit of Pharmacology and Therapeutics, Faculty of Medicine, University of Porto, Porto, Portugal
| | - João Paulo Teixeira
- Department of Environmental Health, National Institute of Health Dr. Ricardo Jorge, Porto, Portugal
- EPIUnit-Institute of Public Health, University of Porto, Porto, Portugal
- Laboratory for Integrative and Translational Research in Population Health (ITR), Porto, Portugal
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Cubayachi C, Lemos CN, Pereira F, Dias K, Herculano RD, de Freitas O, Lopez RF. Silk fibroin films stabilizes and releases bioactive insulin for the treatment of corneal wounds. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.06.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Liu X, Zheng S, Qin Y, Ding W, Tu Y, Chen X, Wu Y, Yanhua L, Cai X. Experimental Evaluation of the Transport Mechanisms of PoIFN-α in Caco-2 Cells. Front Pharmacol 2017; 8:781. [PMID: 29163167 PMCID: PMC5681924 DOI: 10.3389/fphar.2017.00781] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 10/16/2017] [Indexed: 11/18/2022] Open
Abstract
For the development of an efficient intestinal delivery system for Porcine interferon-α (PoIFN-α), the understanding of transport mechanisms of which in the intestinal cell is essential. In this study, we investigated the absorption mechanisms of PoIFN-α in intestine cells. Caco-2 cells and fluorescein isothiocyanate-labeled (FITC)-PoIFN-α were used to explore the whole transport process, including endocytosis, intracellular trafficking, exocytosis, and transcytosis. Via various techniques, the transport pathways of PoIFN-α in Caco-2 cells and the mechanisms were clarified. Firstly, the endocytosis of PoIFN-α by Caco-2 cells was time, concentration and temperature dependence. And the lipid raft/caveolae endocytosis was the most likely endocytic pathway for PoIFN-α. Secondly, both Golgi apparatus and lysosome were involved in the intracellular trafficking of PoIFN-α. Thirdly, the treatment of indomethacin resulted in a significant decrease of exocytosis of PoIFN-α, indicating the participation of cyclooxygenase. Finally, to evaluate the efficiency of PoIFN-α transport, the transepithelial electrical resistance (TEER) value was measured to investigate the tight junctional integrity of the cell monolayers. The fluorescence microscope results revealed that the transport of PoIFN-α across the Caco-2 cell monolayers was restricted. In conclusion, this study depicts a probable picture of PoIFN-α transport in Caco-2 cells characterized by non-specificity, partial energy-dependency and low transcytosis.
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Affiliation(s)
- Xin Liu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Sidi Zheng
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Yue Qin
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Wenya Ding
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Yabin Tu
- Harbin Veterinary Institute of Chinese Academy of Sciences, Harbin, China
| | - Xingru Chen
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Yunzhou Wu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Li Yanhua
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Harbin, China
| | - Xuehui Cai
- Harbin Veterinary Institute of Chinese Academy of Sciences, Harbin, China
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Jiao Z, Chang J, Li J, Nie D, Cui H, Guo D. Sulforaphane increases Nrf2 expression and protects alveolar epithelial cells against injury caused by cigarette smoke extract. Mol Med Rep 2017; 16:1241-1247. [PMID: 28586068 PMCID: PMC5562053 DOI: 10.3892/mmr.2017.6700] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 03/16/2017] [Indexed: 12/17/2022] Open
Abstract
Cigarette smoking is a primary risk factor for chronic obstructive pulmonary disease (COPD), as it damages epithelial cells through a variety of mechanisms. Sulforaphane (SFN) is an antioxidant agent, which exerts protective effects against cell damage by activating the nuclear factor erythroid 2 like 2 (NFE2L2; Nrf2). The present study was undertaken to investigate the effects and underlying mechanisms of SFN in preventing cigarette smoke extract (CSE)‑induced oxidative damage to RLE‑6TN rat lung epithelial cells. MTT assay was used to determine the cytotoxicity of SFN and CSE. The effect of SFN and CSE on cell cycle progression, apoptosis and intracellular reactive oxygen species (ROS) levels were analyzed using flow cytometry. Reverse transcription‑quantitative polymerase chain reaction and western blotting were used to quantify mRNA and protein expression levels of Nrf2 respectively. SFN protected RLE‑6TN cells from oxidative damage, potentially via increasing Nrf2 expression and reducing ROS levels. In addition, SFN attenuated G1 phase cell cycle arrest and abrogated apoptosis. Therefore, SFN protected alveolar epithelial cells against CSE‑induced oxidative injury by upregulating Nrf2 expression. The results of the present study may provide theoretical support for the clinical use of SFN in patients with COPD.
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Affiliation(s)
- Zongxian Jiao
- Research Institute of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Jiachen Chang
- Research Institute of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
- Department of Pathology, Fangshan Maternal & Child Health Hospital of Beijing, Beijing 102488, P.R. China
| | - Jing Li
- Research Institute of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Dengmei Nie
- Research Institute of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Huijuan Cui
- Research Institute of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Dongfang Guo
- Research Institute of Pathology, School of Basic Medical Sciences, Lanzhou University, Lanzhou, Gansu 730000, P.R. China
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Togami K, Yamaguchi K, Chono S, Tada H. Evaluation of permeability alteration and epithelial–mesenchymal transition induced by transforming growth factor-β1 in A549, NCI-H441, and Calu-3 cells: Development of an in vitro model of respiratory epithelial cells in idiopathic pulmonary fibrosis. J Pharmacol Toxicol Methods 2017; 86:19-27. [DOI: 10.1016/j.vascn.2017.02.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 11/11/2016] [Accepted: 02/27/2017] [Indexed: 10/20/2022]
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Li P, Nielsen HM, Müllertz A. Impact of Lipid-Based Drug Delivery Systems on the Transport and Uptake of Insulin Across Caco-2 Cell Monolayers. J Pharm Sci 2016; 105:2743-2751. [DOI: 10.1016/j.xphs.2016.01.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/01/2016] [Accepted: 01/05/2016] [Indexed: 10/22/2022]
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Andrade F, Fonte P, Costa A, Reis CC, Nunes R, Almeida A, Ferreira D, Oliva M, Sarmento B. Pharmacological and toxicological assessment of innovative self-assembled polymeric micelles as powders for insulin pulmonary delivery. Nanomedicine (Lond) 2016; 11:2305-17. [DOI: 10.2217/nnm-2016-0045] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Aim: Explore the use of polymeric micelles in the development of powders intended for pulmonary delivery of biopharmaceuticals, using insulin as a model protein. Materials & methods: Formulations were assessed in vitro for aerosolization properties and in vivo for efficacy and safety using a streptozotocin-induced diabetic rat model. Results: Powders presented good aerosolization properties like fine particle fraction superior to 40% and a mass median aerodynamic diameter inferior of 6 μm. Endotracheally instilled powders have shown a faster onset of action than subcutaneous administration of insulin at a dose of 10 IU/kg, with pharmacological availabilities up to 32.5% of those achieved by subcutaneous route. Additionally, micelles improved the hypoglycemic effect of insulin. Bronchoalveolar lavage screening for toxicity markers (e.g., lactate dehydrogenase, cytokines) revealed no signs of lung inflammation and cytotoxicity 14 days postadministration. Conclusion: Developed powders showed promising safety and efficacy characteristics for the systemic delivery of insulin by pulmonary administration.
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Affiliation(s)
- Fernanda Andrade
- Laboratory of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- IBEC, Institute for Bioengineering of Catalonia, 08028 Barcelona, Spain
- School of Pharmacy, University of Barcelona, 08028 Barcelona, Spain
| | - Pedro Fonte
- REQUIMTE, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, 4585-116 Gandra PRD, Portugal
| | - Ana Costa
- INEB Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
- I3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
| | - Cassilda Cunha Reis
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, 4585-116 Gandra PRD, Portugal
| | - Rute Nunes
- INEB Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
- I3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
| | - Andreia Almeida
- INEB Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
- I3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
| | - Domingos Ferreira
- Laboratory of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - Mireia Oliva
- IBEC, Institute for Bioengineering of Catalonia, 08028 Barcelona, Spain
- School of Pharmacy, University of Barcelona, 08028 Barcelona, Spain
- CIBER-BBN, Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine, 28029 Madrid, Spain
| | - Bruno Sarmento
- CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, 4585-116 Gandra PRD, Portugal
- INEB Instituto de Engenharia Biomédica, Universidade do Porto, 4200-135 Porto, Portugal
- I3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
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Schultz I, Vollmers F, Lühmann T, Rybak JC, Wittmann R, Stank K, Steckel H, Kardziev B, Schmidt M, Högger P, Meinel L. Pulmonary Insulin-like Growth Factor I Delivery from Trehalose and Silk-Fibroin Microparticles. ACS Biomater Sci Eng 2015. [DOI: 10.1021/ab500101c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Isabel Schultz
- Institute
for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Frederic Vollmers
- Institute
for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Tessa Lühmann
- Institute
for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Jens-Christoph Rybak
- Institute
for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Ronja Wittmann
- Institute
for Pharmacy, University of Kiel, Grasweg 9a, DE-24118 Kiel, Germany
| | - Katharina Stank
- Institute
for Pharmacy, University of Kiel, Grasweg 9a, DE-24118 Kiel, Germany
| | - Hartwig Steckel
- Institute
for Pharmacy, University of Kiel, Grasweg 9a, DE-24118 Kiel, Germany
| | | | - Michael Schmidt
- Medical
Clinic and Polyclinic I, University of Wuerzburg, DE-97080, Germany
| | - Petra Högger
- Institute
for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
| | - Lorenz Meinel
- Institute
for Pharmacy and Food Chemistry, University of Wuerzburg, Am Hubland, DE-97074 Wuerzburg, Germany
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Sachdeva R, Li Y, Shilpi RY, Simm M. Human X-DING-CD4 mediates resistance to HIV-1 infection through novel paracrine-like signaling. FEBS J 2015; 282:937-50. [PMID: 25581464 DOI: 10.1111/febs.13192] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 01/06/2015] [Accepted: 01/07/2015] [Indexed: 11/30/2022]
Abstract
X-DING-CD4 is a novel phosphatase mediating antiviral responses to HIV-1 infection. This protein is constitutively expressed and secreted by HIV-1 resistant CD4(+) T cells and its mRNA transcription is up-regulated in peripheral blood mononuclear cells from HIV-1 elite controllers. The secreted/soluble X-DING-CD4 protein form is of particular importance because it blocks virus transcription when added to HIV-1 susceptible cells. The present study aimed to determine the contribution of this factor to the induction of the antiviral response in target cells. We found that soluble X-DING-CD4 enters cells by endocytosis and that influx of this protein induced transcription of interferon-α and endogenous X-DING-CD4 mRNA in transformed CD4(+) T cells and primary macrophages. Treatment of HIV-1 susceptible cells with exogenous X-DING-CD4 caused depletion of phosphorylated p50 and p65 nuclear factor kappa β subunits and a significant reduction in p50/p65 nuclear factor kappa β binding to the HIV-1 long terminal repeat. Taken together, these findings indicate a novel antiviral mechanism mediated by the influx of soluble X-DING-CD4, its signaling to promote self-amplification, and functional duality as an endogenous innate immunity effector and exogenous factor regulating gene expression in bystander cells.
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Affiliation(s)
- Rakhee Sachdeva
- Protein Chemistry Laboratory, St Luke's/Roosevelt Institute for Health Sciences, Columbia University, New York, NY, USA
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Takano M, Kawami M, Aoki A, Yumoto R. Receptor-mediated endocytosis of macromolecules and strategy to enhance their transport in alveolar epithelial cells. Expert Opin Drug Deliv 2014; 12:813-25. [DOI: 10.1517/17425247.2015.992778] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Analysis of TGF-β1- and drug-induced epithelial-mesenchymal transition in cultured alveolar epithelial cell line RLE/Abca3. Drug Metab Pharmacokinet 2014; 30:111-8. [PMID: 25760538 DOI: 10.1016/j.dmpk.2014.10.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 09/06/2014] [Accepted: 10/13/2014] [Indexed: 12/19/2022]
Abstract
In this study, we examined the induction of epithelial-mesenchymal transition (EMT) by transforming growth factor (TGF)-β1 and drugs in genetically engineered type II alveolar epithelial cell line RLE/Abca3. Treatment of RLE/Abca3 cells with TGF-β1 induced marked changes in cell morphology from epithelial-like to elongated fibroblast-like morphology. With these morphological changes, mRNA expression of epithelial markers such as cytokeratin 19 (CK19) decreased, while that of mesenchymal markers such as α-smooth muscle actin (α-SMA) increased. TGF-β1 treatment also decreased the mRNA expression of Abca3, a type II cell marker, and formation of lamellar body structures. Interestingly, the effect of TGF-β1 on Abca3 mRNA expression was observed in RLE/Abca3 cells, but not in wild-type RLE-6TN, A549, and H441 cells. Treatment of RLE/Abca3 cells with bleomycin (BLM) and methotrexate (MTX) induced similar morphological and mRNA expression changes. In addition, the increase in α-SMA and the decrease in Abca3 mRNA expression by these drugs were observed only in RLE/Abca3 cells. These findings suggest that, like TGF-β1, BLM and MTX induce EMT in RLE/Abca3 cells, and RLE/Abca3 cells would be a good model to study drug-induced EMT. The effect of pirfenidone, an antifibrotic and anti-inflammatory drug, on EMT induced by TGF-β1 was also discussed.
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Li X, Yu M, Fan W, Gan Y, Hovgaard L, Yang M. Orally active-targeted drug delivery systems for proteins and peptides. Expert Opin Drug Deliv 2014; 11:1435-47. [DOI: 10.1517/17425247.2014.924500] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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13
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Zhang WZ. An association of metabolic syndrome constellation with cellular membrane caveolae. PATHOBIOLOGY OF AGING & AGE RELATED DISEASES 2014; 4:23866. [PMID: 24563731 PMCID: PMC3926988 DOI: 10.3402/pba.v4.23866] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 01/21/2014] [Accepted: 01/21/2014] [Indexed: 01/19/2023]
Abstract
Metabolic syndrome (MetS) is a cluster of metabolic abnormalities that can predispose an individual to a greater risk of developing type-2 diabetes and cardiovascular diseases. The cluster includes abdominal obesity, dyslipidemia, hypertension, and hyperglycemia - all of which are risk factors to public health. While searching for a link among the aforementioned malaises, clues have been focused on the cell membrane domain caveolae, wherein the MetS-associated active molecules are colocalized and interacted with to carry out designated biological activities. Caveola disarray could induce all of those individual metabolic abnormalities to be present in animal models and humans, providing a new target for therapeutic strategy in the management of MetS.
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Affiliation(s)
- Wei-Zheng Zhang
- CMP Laboratory, Port Melbourne, Melbourne, Victoria, Australia
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Takano M, Horiuchi T, Sasaki Y, Kato Y, Nagai J, Yumoto R. Expression and function of PEPT2 during transdifferentiation of alveolar epithelial cells. Life Sci 2013; 93:630-6. [DOI: 10.1016/j.lfs.2013.08.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 08/10/2013] [Accepted: 08/15/2013] [Indexed: 01/25/2023]
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Takano M, Horiuchi T, Nagai J, Yumoto R. Effect of cigarette smoke extract on insulin transport in alveolar epithelial cell line A549. Lung 2012; 190:651-9. [PMID: 22960792 DOI: 10.1007/s00408-012-9413-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 08/21/2012] [Indexed: 11/26/2022]
Abstract
BACKGROUND The main purpose of this study was to evaluate the effect of cigarette smoke extract (CSE) on insulin transport in alveolar epithelial cells. METHODS We first examined the effect of CSE pretreatment on cell viability, mRNA expression, and lamellar body structures in A549 cells. Then the effect of CSE pretreatment on FITC-insulin transport was examined. RESULTS When A549 cells were treated with 30 μg/ml of CSE for 48 h, the expression of some mRNAs abundantly expressed in type II alveolar epithelial cells such as surfactant protein B was significantly increased. Lamellar bodylike structures became more evident with CSE treatment. FITC-insulin uptake from the apical side and subsequent efflux to the basal side was enhanced by CSE treatment in A549 cells. The enhancing effect of CSE on FITC-insulin uptake was concentration-dependent and reversible. A concentration-dependent enhancing effect of CSE on FITC-insulin uptake was also observed in normal, primary cultured alveolar type II epithelial cells isolated from rats. CONCLUSIONS Treatment of A549 cells by CSE may direct the cells to a more type II-like phenotype. In accordance with this observation, FITC-insulin uptake was enhanced by CSE treatment. These results may partly explain the higher insulin absorption from the lung in smokers than in nonsmokers.
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Affiliation(s)
- Mikihisa Takano
- Department of Pharmaceutics and Therapeutics, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8553, Japan.
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Oda K, Yumoto R, Nagai J, Katayama H, Takano M. Enhancement Effect of Poly(amino acid)s on Insulin Uptake in Alveolar Epithelial Cells. Drug Metab Pharmacokinet 2012; 27:570-8. [DOI: 10.2133/dmpk.dmpk-12-rg-002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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