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Park WH. Propyl gallate induces human pulmonary fibroblast cell death through the regulation of Bax and caspase-3. Ann Med 2024; 56:2319853. [PMID: 38373208 PMCID: PMC10878342 DOI: 10.1080/07853890.2024.2319853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 02/11/2024] [Indexed: 02/21/2024] Open
Abstract
Propyl gallate (PG) has been found to exert an inhibitory effect on the growth of different cell types, including lung cancer cells. However, little is known about the cytotoxicological effects of PG specifically on normal primary lung cells. The current study examined the cellular effects and cell death resulting from PG treatment in human pulmonary fibroblast (HPF) cells. DNA flow cytometry results demonstrated that PG (100-1,600 μM) had a significant impact on the cell cycle, leading to G1 phase arrest. Notably, 1,600 μM PG slightly increased the number of sub-G1 cells. Additionally, PG (400-1,600 μM) resulted in the initiation of cell death, a process that coincided with a loss of mitochondrial membrane potential (MMP; ΔΨm). This loss of MMP (ΔΨm) was evaluated using a FACS cytometer. In PG-treated HPF cells, inhibitors targeting pan-caspase, caspase-3, caspase-8, and caspase-9 showed no significant impact on the quantity of annexin V-positive and MMP (ΔΨm) loss cells. The administration of siRNA targeting Bax or caspase-3 demonstrated a significant attenuation of PG-induced cell death in HPF cells. However, the use of siRNAs targeting p53, Bcl-2, or caspase-8 did not exhibit any notable effect on cell death. Furthermore, none of the tested MAPK inhibitors, including MEK, c-Jun N-terminal kinase (JNK), and p38, showed any impact on PG-induced cell death or the loss of MMP (ΔΨm) in HPF cells. In conclusion, PG induces G1 phase arrest of the cell cycle and cell death in HPF cells through apoptosis and/or necrosis. The observed HPF cell death is mediated by the modulation of Bax and caspase-3. These findings offer insights into the cytotoxic and molecular effects of PG on normal HPF cells.
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Affiliation(s)
- Woo Hyun Park
- Department of Physiology, Medical School, Jeonbuk National University, Jeonju, Jeollabuk, Republic of Korea
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2
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Park WH. Propyl gallate induces cell death in human pulmonary fibroblast through increasing reactive oxygen species levels and depleting glutathione. Sci Rep 2024; 14:5375. [PMID: 38438412 PMCID: PMC10912098 DOI: 10.1038/s41598-024-52849-z] [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: 10/03/2023] [Accepted: 01/24/2024] [Indexed: 03/06/2024] Open
Abstract
Propyl gallate (PG) exhibits an anti-growth effect on various cell types. The present study investigated the impact of PG on the levels of reactive oxygen species (ROS) and glutathione (GSH) in primary human pulmonary fibroblast (HPF) cells. Moreover, the effects of N-acetyl cysteine (NAC, an antioxidant), L-buthionine sulfoximine (BSO, a GSH synthesis inhibitor), and small interfering RNA (siRNAs) against various antioxidant genes on ROS and GSH levels and cell death were examined in PG-treated HPF cells. PG (100-800 μM) increased the levels of total ROS and O2·- at early time points of 30-180 min and 24 h, whereas PG (800-1600 μM) increased GSH-depleted cell number at 24 h and reduced GSH levels at 30-180 min. PG downregulated the activity of superoxide dismutase (SOD) and upregulated the activity of catalase in HPF cells. Treatment with 800 μM PG increased the number of apoptotic cells and cells that lost mitochondrial membrane potential (MMP; ΔΨm). NAC treatment attenuated HPF cell death and MMP (ΔΨm) loss induced by PG, accompanied by a decrease in GSH depletion, whereas BSO exacerbated the cell death and MMP (ΔΨm) loss without altering ROS and GSH depletion levels. Furthermore, siRNA against SOD1, SOD2, or catalase attenuated cell death in PG-treated HPF cells, whereas siRNA against GSH peroxidase enhanced cell death. In conclusion, PG induced cell death in HPF cells by increasing ROS levels and depleting GSH. NAC was found to decrease HPF cell death induced by PG, while BSO enhanced cell death. The findings shed light on how manipulating the antioxidant system influence the cytotoxic effects of PG in HPF cells.
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Affiliation(s)
- Woo Hyun Park
- Department of Physiology, Medical School, Jeonbuk National University, 20 Geonji-Ro, Deokjin, Jeonju, Jeollabuk, 54907, Republic of Korea.
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3
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The Anti-Apoptotic Effects of Caspase Inhibitors in Propyl Gallate-Treated Lung Cancer Cells Are Related to Changes in Reactive Oxygen Species and Glutathione Levels. Molecules 2022; 27:molecules27144587. [PMID: 35889456 PMCID: PMC9321184 DOI: 10.3390/molecules27144587] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/06/2022] [Accepted: 07/12/2022] [Indexed: 12/04/2022] Open
Abstract
Propyl gallate [3,4,5-trihydroxybenzoic acid propyl ester; PG] exhibits an anti-growth effect in various cells. In this study, the anti-apoptotic effects of various caspase inhibitors were evaluated in PG-treated Calu-6 and A549 lung cancer cells in relation to reactive oxygen species (ROS) and glutathione (GSH) levels. Treatment with 800 μM PG inhibited the proliferation and induced the cell death of both Calu-6 and A549 cells at 24 h. Each inhibitor of pan-caspase, caspase-3, caspase-8, and caspase-9 reduced the number of dead and sub-G1 cells in both PG-treated cells at 24 h. PG increased ROS levels, including O2∙−, in both lung cancer cell lines at 24 h. Generally, caspase inhibitors appeared to decrease ROS levels in PG-treated lung cancer cells at 24 h and somewhat reduced O2∙− levels. PG augmented the number of GSH-depleted Calu-6 and A549 cells at 24 h. Caspase inhibitors did not affect the level of GSH depletion in PG-treated A549 cells but differently and partially altered the depletion level in PG-treated Calu-6 cells. In conclusion, PG exhibits an anti-proliferative effect in Calu-6 and A549 lung cancer cells and induced their cell death. PG-induced lung cancer death was accompanied by increases in ROS levels and GSH depletion. Therefore, the anti-apoptotic effects of caspase inhibitors were, at least in part, related to changes in ROS and GSH levels.
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4
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Park WH. Propyl gallate decreases the proliferation of Calu-6 and A549 lung cancer cells via affecting reactive oxygen species and glutathione levels. J Appl Toxicol 2021; 42:436-449. [PMID: 34464457 DOI: 10.1002/jat.4231] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 07/29/2021] [Accepted: 08/12/2021] [Indexed: 01/19/2023]
Abstract
Propyl gallate (3,4,5-trihydroxybenzoic acid propyl ester, PG) has an anti-proliferative effect in various cells. In this study, Calu-6 and A549 lung cancer cells were used to examine the anti-proliferative effect of PG in relation to reactive oxygen species (ROS) and glutathione (GSH) levels. PG (100-1,600 μM) dose-dependently inhibited the proliferation of Calu-6 and A549 cells at 24 h, and PG at 800-1,600 μM strongly induced cell death in both cell lines. PG (800-1,600 μM) increased cellular metabolism in Calu-6 but not A549 cells at 4 h. PG either increased or decreased ROS levels, including O2 ˙- and ˙OH, depending on the incubation doses and times of 1 or 24 h. Even these effects differed between Calu-6 and A549 cell types. PG reduced the activity of superoxide dismutase (SOD) in Calu-6 cells, and it augmented the activity of catalase in A549 cells. PG dose-dependently increased the number of GSH depleted cells in both Calu-6 and A549 cells at 24 h. In addition, PG decreased GSH levels in both lung cancer cells at 1 h. Furthermore, diethyldithiocarbamate (DDC; an inhibitor of SOD) and 3-amino-1,2,4-triazole (AT; an inhibitor of catalase) differently affected cellular metabolism, ROS and GSH levels in PG-treated and PG-untreated Calu-6 and A549 cells at 1 h. In conclusion, PG dose-dependently decreased the proliferation of Calu-6 and A549 lung cancer cells, which was related to changes in ROS levels and the depletion of GSH.
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Affiliation(s)
- Woo Hyun Park
- Department of Physiology, Medical School, Jeonbuk National University, Jeonju, Republic of Korea
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5
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Park WH. Enhanced cell death effects of MAP kinase inhibitors in propyl gallate-treated lung cancer cells are related to increased ROS levels and GSH depletion. Toxicol In Vitro 2021; 74:105176. [PMID: 33865947 DOI: 10.1016/j.tiv.2021.105176] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 04/04/2021] [Accepted: 04/14/2021] [Indexed: 10/21/2022]
Abstract
Propyl gallate (PG) has an anti-growth effect in lung cancer cells. The present study investigated the effects of mitogen-activated protein kinase (MAPK; MEK, JNK, and p38) inhibitors on PG-treated Calu-6 and A549 lung cancer cells in relation to cell death as well as reactive oxygen species (ROS) and glutathione (GSH) levels. PG induced cell death in both Calu-6 and A549 lung cancer cells at 24 h, which was accompanied by loss of mitochondrial membrane potential (MMP; ΔΨm). All of the tested MAPK inhibitors increased cell death in both PG-treated lung cancer cell lines. In particular, MEK inhibitor strongly enhanced cell death and MMP (ΔΨm) loss in PG-treated Calu-6 cells and p38 inhibitor had the same effects in A549 cells as well. PG increased ROS levels and caused GSH depletion in both cell lines at 24 h. MAPK inhibitors increased O2•- levels and GSH depletion in PG-treated Calu-6 cells, and JNK and p38 inhibitors increased ROS levels and GSH depletion in PG-treated A549 cells. In conclusion, MAPK inhibitors increased cell death in PG-treated Calu-6 and A549 lung cancer cells. Enhanced cell death and GSH depletion in Calu-6 cells caused by the MEK inhibitor were related to increased O2•- levels, and the effects of the p38 inhibitor in A549 cells were correlated with increased general ROS levels.
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Affiliation(s)
- Woo Hyun Park
- Department of Physiology, Jeonbuk National University, 20 Geonji-ro, Deokjin, Jeonju, Jeollabuk 54907, Republic of Korea.
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Wang S, Gan Y, Mao X, Kan H, Li N, Zhang C, Wang Z, Wang Y. Antioxidant Activity Evaluation of Oviductus Ranae Protein Hydrolyzed by Different Proteases. Molecules 2021; 26:1625. [PMID: 33804057 PMCID: PMC8002033 DOI: 10.3390/molecules26061625] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/06/2021] [Accepted: 03/12/2021] [Indexed: 11/16/2022] Open
Abstract
As nutrition and a health tonic for both medicine and food, the protein content of Oviductus Ranae is more than 40%, making it an ideal source to produce antioxidant peptides. This work evaluated the effects of six different proteases (pepsin, trypsin, papain, flavourzyme, neutral protease and alcalase) on the antioxidant activity of Oviductus Ranae protein, and analyzed the relationship between the hydrolysis time, the degree of hydrolysis (DH) and the antioxidant activity of the enzymatic hydrolysates. The results showed that the antioxidant activity of Oviductus Ranae protein was significantly improved and the optimal hydrolysis time was maintained between 3-4 h under the action of different proteases. Among them, the protein hydrolysate which was hydrolyzed by pepsin for 180 min had the strongest comprehensive antioxidant activity and was most suitable for the production of antioxidant peptides. At this time, the DH, the DPPH radical scavenging activity, the absorbance value of reducing power determination and the hydroxyl radical scavenging activity corresponding to the enzymatic hydrolysate were 13.32 ± 0.24%, 70.63 ± 1.53%, 0.376 ± 0.009 and 31.96 ± 0.78%, respectively. Correlation analysis showed that there was a significant positive correlation between the hydrolysis time, the DH and the antioxidant activity of the enzymatic hydrolysates, further indicating that the hydrolysates of Oviductus Ranae protein had great antioxidant potential. The traditional anti-aging efficacy of Oviductus Ranae is closely related to the scavenging of reactive oxygen species, and its hydrolysates have better antioxidant capacity, which also provides support for further development of its traditional anti-aging efficacy.
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Affiliation(s)
- Shihan Wang
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China; (X.M.); (H.K.)
| | - Yuanshuai Gan
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China; (Y.G.); (N.L.); (C.Z.)
| | - Xinxin Mao
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China; (X.M.); (H.K.)
| | - Hong Kan
- College of Chinese Medicinal Materials, Jilin Agricultural University, Changchun 130118, China; (X.M.); (H.K.)
| | - Nan Li
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China; (Y.G.); (N.L.); (C.Z.)
| | - Changli Zhang
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China; (Y.G.); (N.L.); (C.Z.)
| | - Zhihan Wang
- Department of Physical Sciences, Eastern New Mexico University, Portales, NM 88130, USA;
| | - Yongsheng Wang
- School of Pharmaceutical Sciences, Jilin University, Changchun 130021, China; (Y.G.); (N.L.); (C.Z.)
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Park WH. Gallic acid inhibits the growth of calf pulmonary arterial endothelial cells through cell death and glutathione depletion. Mol Med Rep 2017; 16:7805-7812. [PMID: 29048101 DOI: 10.3892/mmr.2017.7585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 03/03/2017] [Indexed: 11/05/2022] Open
Abstract
Gallic acid (GA) exhibits a number of cellular effects, including apoptosis, which is associated with oxidative stress. The present study investigated the effects of GA on calf pulmonary arterial endothelial cell (CPAEC) growth and death, along with the levels of reactive oxygen species (ROS) and glutathione (GSH). GA treatment inhibited the growth of CPAECs at 24 h, and the half‑maximal inhibitory concentration (IC50) value of GA was ~30 µM. GA treatment also induced cell death, which was accompanied by a loss of mitochondrial membrane potential (ΔѰm). GA treatment in CPAECs resulted in decreased ROS levels, including O2•‑, whereas the number of GSH‑depleted cells increased. Neither a pan‑caspase inhibitor (benzyloxycarbonyl‑Val‑Ala‑Asp‑fluoromethylketone) nor buthionine sulfoximine treatment affected GA‑induced cell growth inhibition, cell death, ROS and GSH levels in CPAECs, whereas co‑treatment with N‑acetyl‑cysteine (NAC) resulted in enhanced cell growth inhibition, cell death and ΔѰm loss in these cells. Although NAC treatment did not significantly influence ROS levels in GA‑treated CPAECs, it significantly enhanced GSH depletion in these cells. In conclusion, GA inhibited the growth of CPAECs via cell death, which was associated with GSH depletion rather than alterations to ROS levels.
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Affiliation(s)
- Woo Hyun Park
- Department of Physiology, Medical School, Research Institute for Endocrine Sciences, Chonbuk National University, Jeonju, Jeollabuk 54907, Republic of Korea
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Topal A, Çomakli S, Özkaraca M, Baran A, Köktürk M, Parlak V, Sağlam YS, Atamanalp M, Ceyhun SB. Immunofluorescence evaluation of 4-hydroxynonenal and 8-hydroxy-2-deoxyguanosine activation in zebrafish (Daino rerio) larvae brain exposed (microinjected) to propyl gallate. CHEMOSPHERE 2017; 183:252-256. [PMID: 28550782 DOI: 10.1016/j.chemosphere.2017.05.110] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/15/2017] [Accepted: 05/18/2017] [Indexed: 06/07/2023]
Abstract
Propyl gallate (PG) is a chemical compound obtained by esterification of propanol with gallic acid. Due to its antioxidative properties, it is widely used in cosmetics and pharmaceutical industries as well as to protect the oils in foods such as butter, milk-based desserts, chewing gum, mayonnaise, meat, soups, cereals, spices and seasonings from rancidity. This study has been designed to assessment 8-OHdG and 4-HNE activity, and histopathological changes in the brain tissues of zebrafish larvae, which is a lecithotrophic organism, after 96 h of PG exposure via microinjecting to yolk sac of embryo. To this end, approximately 5 nL of various concentrations of PG (1, 10, and 50 ppm) has been injected into yolk sac of fertilized embryo (final exposure concentrations are 5, 50, 250 pg/egg) with micro manipulator system. After 96 h exposure time, propyl gallate caused immunofluorescence positivity of 8-OHdG and 4-HNE in the brain tissues of zebrafish larvae. PG was not effect brain tissue histopathological in low concentrations (1 and 10 ppm) but highest concentration (50 ppm) caused degenerative changes in brain. These results suggests that PG treatment could lead oxidative DNA damage by causing an increase 8-OHdG and 4-HNE activities. This strategy will enable us to better understand the mechanisms of propyl gallate in brain tissues of zebrafish larvae.
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Affiliation(s)
- Ahmet Topal
- Department of Basic Sciences, Faculty of Fisheries, Atatürk University, TR-25240 Erzurum, Turkey
| | - Selim Çomakli
- Department of Pathology, Faculty of Veterinary, Atatürk University, TR-25240 Erzurum, Turkey
| | - Mustafa Özkaraca
- Department of Pathology, Faculty of Veterinary, Atatürk University, TR-25240 Erzurum, Turkey
| | - Alper Baran
- Erzurum Vocational School, Department of Food Quality Control and Analysis, Atatürk University, TR-25240 Erzurum, Turkey
| | - Mine Köktürk
- Department of Aquaculture, Faculty of Fisheries, Atatürk University, TR-25240 Erzurum, Turkey; Fisheries Faculty, Aquatic Biotechnology Laboratory, Atatürk University Erzurum, TR-25240, Turkey
| | - Veysel Parlak
- Department of Aquaculture, Faculty of Fisheries, Atatürk University, TR-25240 Erzurum, Turkey
| | - Yavuz Selim Sağlam
- Department of Pathology, Faculty of Veterinary, Atatürk University, TR-25240 Erzurum, Turkey
| | - Muhammed Atamanalp
- Department of Aquaculture, Faculty of Fisheries, Atatürk University, TR-25240 Erzurum, Turkey
| | - Saltuk Buğrahan Ceyhun
- Department of Aquaculture, Faculty of Fisheries, Atatürk University, TR-25240 Erzurum, Turkey; Fisheries Faculty, Aquatic Biotechnology Laboratory, Atatürk University Erzurum, TR-25240, Turkey.
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9
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Park WH. Treatment with a JNK inhibitor increases, whereas treatment with a p38 inhibitor decreases, H 2O 2-induced calf pulmonary arterial endothelial cell death. Oncol Lett 2017; 14:1737-1744. [PMID: 28789403 DOI: 10.3892/ol.2017.6330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 05/11/2017] [Indexed: 11/05/2022] Open
Abstract
Oxidative stress induces apoptosis in endothelial cells (ECs). Reactive oxygen species (ROS) promote cell death by regulating the activity of various mitogen-activated protein kinases (MAPKs) in ECs. The present study investigated the effects of MAPK inhibitors on cell survival and glutathione (GSH) levels upon H2O2 treatment in calf pulmonary artery ECs (CPAECs). H2O2 treatment inhibited the growth and induced the death of CPAECs, as well as causing GSH depletion and the loss of mitochondrial membrane potential (MMP). While treatment with the MEK or JNK inhibitor impaired the growth of H2O2-treated CPAECs, treatment with the p38 inhibitor attenuated this inhibition of growth. Additionally, JNK inhibitor treatment increased the proportion of sub-G1 phase cells in H2O2-treated CPAECs and further decreased the MMP. However, treatment with a p38 inhibitor reversed the effects of H2O2 treatment on cell growth and the MMP. Similarly, JNK inhibitor treatment further increased, whereas p38 inhibitor treatment decreased, the proportion of GSH-depleted cells in H2O2-treated CPAECs. Each of the MAPK inhibitors affected cell survival, and ROS or GSH levels differently in H2O2-untreated, control CPAECs. The data suggest that the exposure of CPAECs to H2O2 caused the cell growth inhibition and cell death through GSH depletion. Furthermore, JNK inhibitor treatment further enhanced, whereas p38 inhibitors attenuated, these effects. Thus, the results of the present study suggest a specific protective role for the p38 inhibitor, and not the JNK inhibitor, against H2O2-induced cell growth inhibition and cell death.
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Affiliation(s)
- Woo Hyun Park
- Department of Physiology, Medical School, Research Institute for Endocrine Sciences, Chonbuk National University, Jeonju, Jeollabuk 54907, Republic of Korea
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Dwiecki K, Tomczyk Ł, Nogala-Kałucka M, Polewski K. Novel method of propyl gallate determination in rapeseed oil using CdSe/ZnS quantum dots. EUR J LIPID SCI TECH 2016. [DOI: 10.1002/ejlt.201500453] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Krzysztof Dwiecki
- Department of Food Biochemistry and Analysis; Poznan University of Life Sciences; Poznan Poland
| | - Łukasz Tomczyk
- Department of Food Quality Management; Poznan University of Life Sciences; Poznan Poland
| | | | - Krzysztof Polewski
- Department of Physics and Biophysics; Poznan University of Life Sciences; Poznan Poland
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11
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Imprinted propyl gallate electrochemical sensor based on graphene/single walled carbon nanotubes/sol–gel film. Food Chem 2015; 177:37-42. [DOI: 10.1016/j.foodchem.2014.12.097] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 12/24/2014] [Accepted: 12/24/2014] [Indexed: 11/20/2022]
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12
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You BR, Kim SH, Park WH. Reactive oxygen species, glutathione, and thioredoxin influence suberoyl bishydroxamic acid-induced apoptosis in A549 lung cancer cells. Tumour Biol 2014; 36:3429-39. [PMID: 25537089 DOI: 10.1007/s13277-014-2978-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 12/11/2014] [Indexed: 12/12/2022] Open
Abstract
Suberoyl bishydroxamic acid (SBHA) as a histone deacetylase (HDAC) inhibitor can induce apoptosis through the formation of reactive oxygen species (ROS). However, there is no report about the regulation of ROS and antioxidant enzymes in SBHA-treated lung cancer cells. Here, we investigated the toxicological effects of SBHA on the regulations of ROS, glutathione (GSH), and antioxidant enzymes, especially thioredoxin (Trx) in A549 lung cancer cells. SBHA inhibited the growth of A549 cells in time- and dose-dependent manners, and it induced apoptosis which accompanied by the loss of mitochondrial membrane potential (MMP; ΔΨm). SBHA significantly increased ROS levels including O2 (•-) level at 72 h whereas it decreased ROS levels at the early time points (30 min to 3 h). SBHA also induced GSH depletion at 24 and 72 h. N-acetyl cysteine (NAC; a well-known antioxidant) prevented apoptotic cell death and GSH depletion via decreasing ROS in SBHA-treated A549 cells. In addition, SBHA changed the levels of antioxidant-related proteins, especially Trx1. The expression and activity of Trx1 in A549 cells were reduced by SBHA. While the downregulation of Trx1 enhanced cell death, ROS level, and GSH depletion in SBHA-treated A549 cells, the overexpression of Trx1 decreased ROS level in these cells without the prevention of cell death and GSH depletion. In conclusion, SBHA-induced A549 cell death was influenced by changes in ROS and GSH levels. The basal status of Trx1 among other antioxidant proteins was closely correlated with the survival of A549 cells.
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Affiliation(s)
- Bo Ra You
- Department of Physiology, Medical School, Research Institute for Endocrine Sciences, Chonbuk National University, JeonJu, 561-180, Republic of Korea
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Ezzati Nazhad Dolatabadi J, Panahi-Azar V, Barzegar A, Jamali AA, Kheirdoosh F, Kashanian S, Omidi Y. Spectroscopic and molecular modeling studies of human serum albumin interaction with propyl gallate. RSC Adv 2014. [DOI: 10.1039/c4ra11103f] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
For the first time, PG interaction with HSA using fluorescence quenching method, circular dichroism spectroscopy and molecular modeling was investigated.
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Affiliation(s)
- Jafar Ezzati Nazhad Dolatabadi
- Research Center for Pharmaceutical Nanotechnology
- Faculty of Pharmacy
- Tabriz University of Medical Sciences
- Tabriz, Iran
- Student Research Committee
| | - Vahid Panahi-Azar
- Drug Applied Research Center
- Tabriz University of Medical Sciences
- Tabriz, Iran
| | - Abolfazl Barzegar
- Research Institute for Fundamental Sciences (RIFS)
- University of Tabriz
- Tabriz, Iran
| | - Ali Akbar Jamali
- Department of Bioinformatics
- Research Institute of Modern Biological Techniques (RIMBT)
- University of Zanjan
- Zanjan, Iran
| | - Fahimeh Kheirdoosh
- Faculty of Chemistry & Nanoscience and Nanotechnology Research Center (NNRC)
- Razi University
- Kermanshah, Iran
| | - Soheila Kashanian
- Faculty of Chemistry & Nanoscience and Nanotechnology Research Center (NNRC)
- Razi University
- Kermanshah, Iran
| | - Yadollah Omidi
- Research Center for Pharmaceutical Nanotechnology
- Faculty of Pharmacy
- Tabriz University of Medical Sciences
- Tabriz, Iran
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14
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Hamishehkar H, Khani S, Kashanian S, Ezzati Nazhad Dolatabadi J, Eskandani M. Geno- and cytotoxicity of propyl gallate food additive. Drug Chem Toxicol 2013; 37:241-6. [DOI: 10.3109/01480545.2013.838776] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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15
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Zou X, Feng Z, Li Y, Wang Y, Wertz K, Weber P, Fu Y, Liu J. Stimulation of GSH synthesis to prevent oxidative stress-induced apoptosis by hydroxytyrosol in human retinal pigment epithelial cells: activation of Nrf2 and JNK-p62/SQSTM1 pathways. J Nutr Biochem 2011; 23:994-1006. [PMID: 21937211 DOI: 10.1016/j.jnutbio.2011.05.006] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2010] [Revised: 05/15/2011] [Accepted: 05/16/2011] [Indexed: 12/30/2022]
Abstract
The Nrf2-Keap1 pathway is believed to be a critical regulator of the phase II defense system against oxidative stress. By activation of Nrf2, cytoprotective genes such as heme oxygenase-1 (HO-1), NAD(P)H:quinone oxidoreductase (NQO-1) and γ-glutamyl-cysteine ligase (GCL) are induced. GCL-induced glutathione (GSH) production is believed to affect redox signaling, cell proliferation and death. We here report that tert-butyl hydroperoxide (t-BHP)-induced GSH reduction led to mitochondrial membrane potential loss and apoptosis in cultured human retinal pigment epithelial cells from the ARPE-19 cell line. Hydroxytyrosol (HT), a natural phytochemical from olive leaves and oil, was found to induce phase II enzymes and GSH, thus protect t-BHP-induced mitochondrial dysfunction and apoptosis. Depletion of GSH by buthionine-[S,R]-sulfoximine enhanced t-BHP toxicity and abolished HT protection. Overexpression of Nrf2 increased GSH content and efficiently protected t-BHP-induced mitochondrial membrane potential loss. Meanwhile, HT-induced GSH enhancement and induction of Nrf2 target gene (GCLc, GCLm, HO-1, NQO-1) messenger RNA (mRNA) were inhibited by Nrf2 knockdown, suggesting that HT increases GSH through Nrf2 activation. In addition, we found that HT was able to activate the PI3/Akt and mTOR/p70S6-kinase pathways, both of which contribute to survival signaling in stressed cells. However, the effect of HT was not inhibited by the PI3K inhibitor LY294002. Rather, c-Jun N-terminal kinase (JNK) activation was found to induce p62/SQSTM1 expression, which is involved in Nrf2 activation. Our study demonstrates that Nrf2 activation induced by the JNK pathway plays an essential role in the mechanism behind HT's strengthening of the antiapoptotic actions of the endogenous antioxidant system.
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Affiliation(s)
- Xuan Zou
- College of Animal Sciences, Zhejiang University, Hangzhou, China
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Gan Z, Audi SH, Bongard RD, Gauthier KM, Merker MP. Quantifying mitochondrial and plasma membrane potentials in intact pulmonary arterial endothelial cells based on extracellular disposition of rhodamine dyes. Am J Physiol Lung Cell Mol Physiol 2011; 300:L762-72. [PMID: 21239539 DOI: 10.1152/ajplung.00334.2010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Our goal was to quantify mitochondrial and plasma potential (Δψ(m) and Δψ(p)) based on the disposition of rhodamine 123 (R123) or tetramethylrhodamine ethyl ester (TMRE) in the medium surrounding pulmonary endothelial cells. Dyes were added to the medium, and their concentrations in extracellular medium ([R(e)]) were measured over time. R123 [R(e)] fell from 10 nM to 6.6 ± 0.1 (SE) nM over 120 min. TMRE [R(e)] fell from 20 nM to a steady state of 4.9 ± 0.4 nM after ∼30 min. Protonophore or high K(+) concentration ([K(+)]), used to manipulate contributions of membrane potentials, attenuated decreases in [R(e)], and P-glycoprotein (Pgp) inhibition had the opposite effect, demonstrating the qualitative impact of these processes on [R(e)]. A kinetic model incorporating a modified Goldman-Hodgkin-Katz model was fit to [R(e)] vs. time data for R123 and TMRE, respectively, under various conditions to obtain (means ± 95% confidence intervals) Δψ(m) (-130 ± 7 and -133 ± 4 mV), Δψ(p) (-36 ± 4 and -49 ± 4 mV), and a Pgp activity parameter (K(Pgp), 25 ± 5 and 51 ± 11 μl/min). The higher membrane permeability of TMRE also allowed application of steady-state analysis to obtain Δψ(m) (-124 ± 6 mV). The consistency of kinetic parameter values obtained from R123 and TMRE data demonstrates the utility of this experimental and theoretical approach for quantifying intact cell Δψ(m) and Δψ(p.) Finally, steady-state analysis revealed that although room air- and hyperoxia-exposed (95% O(2) for 48 h) cells have equivalent resting Δψ(m), hyperoxic cell Δψ(m) was more sensitive to depolarization with protonophore, consistent with previous observations of pulmonary endothelial hyperoxia-induced mitochondrial dysfunction.
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Affiliation(s)
- Zhuohui Gan
- Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin, USA
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