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Bilska B, Damulewicz M, Abaquita TAL, Pyza E. Changes in heme oxygenase level during development affect the adult life of Drosophila melanogaster. Front Cell Neurosci 2023; 17:1239101. [PMID: 37876913 PMCID: PMC10591093 DOI: 10.3389/fncel.2023.1239101] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 09/15/2023] [Indexed: 10/26/2023] Open
Abstract
Heme oxygenase (HO) has been shown to control various cellular processes in both mammals and Drosophila melanogaster. Here, we investigated how changes in HO levels in neurons and glial cells during development affect adult flies, by using the TARGET Drosophila system to manipulate the expression of the ho gene. The obtained data showed differences in adult survival, maximum lifespan, climbing, locomotor activity, and sleep, which depended on the level of HO (after ho up-regulation or downregulation), the timing of expression (chronic or at specific developmental stages), cell types (neurons or glia), sex (males or females), and age of flies. In addition to ho, the effects of changing the mRNA level of the Drosophila CNC factor gene (NRF2 homolog in mammals and master regulator of HO), were also examined to compare with those observed after changing ho expression. We showed that HO levels in neurons and glia must be maintained at an appropriate physiological level during development to ensure the well-being of adults. We also found that the downregulation of ho in either neurons or glia in the brain is compensated by ho expressed in the retina.
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Affiliation(s)
| | | | | | - Elzbieta Pyza
- Department of Cell Biology and Imaging, Institute of Zoology and Biomedical Research, Jagiellonian University, Cracow, Poland
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2
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Copper (II) complexes derived from pyridoxal: Structural correlations, cytotoxic activities, and molecular docking. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120530] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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3
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Teixeira TR, Rangel KC, Tavares RSN, Kawakami CM, Dos Santos GS, Maria-Engler SS, Colepicolo P, Gaspar LR, Debonsi HM. In Vitro Evaluation of the Photoprotective Potential of Quinolinic Alkaloids Isolated from the Antarctic Marine Fungus Penicillium echinulatum for Topical Use. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2021; 23:357-372. [PMID: 33811268 DOI: 10.1007/s10126-021-10030-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Marine-derived fungi proved to be a rich source of biologically active compounds. The genus Penicillium has been extensively studied regarding their secondary metabolites and biological applications. However, the photoprotective effects of these metabolites remain underexplored. Herein, the photoprotective potential of Penicillium echinulatum, an Antarctic alga-associated fungus, was assessed by UV absorption, photostability study, and protection from UVA-induced ROS generation assay on human immortalized keratinocytes (HaCaT) and reconstructed human skin (RHS). The photosafety was evaluated by the photoreactivity (OECD TG 495) and phototoxicity assays, performed by 3T3 neutral red uptake (3T3 NRU PT, OECD TG 432) and by the RHS model. Through a bio-guided purification approach, four known alkaloids, (-)-cyclopenin (1), dehydrocyclopeptine (2), viridicatin (3), and viridicatol (4), were isolated. Compounds 3 and 4 presented absorption in UVB and UVA-II regions and were considered photostable after UVA irradiation. Despite compounds 3 and 4 showed phototoxic potential in 3T3 NRU PT, no phototoxicity was observed in the RHS model (reduction of cell viability < 30%), which indicates their very low acute photoirritation and high photosafety potential in humans. Viridicatin was considered weakly photoreactive, while viridicatol showed no photoreactivity; both compounds inhibited UVA-induced ROS generation in HaCaT cells, although viridicatol was not able to protect the RHS model against UVA-induced ROS production. Thus, the results highlighted the photoprotective and antioxidant potential of metabolites produced by P. echinulatum which can be considered a new class of molecules for photoprotection, since their photosafety and non-cytotoxicity were predicted using recommended in vitro methods for topical use.
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Affiliation(s)
- Thaiz Rodrigues Teixeira
- Department of Biomolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Karen Cristina Rangel
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Renata Spagolla Napoleão Tavares
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Camila Martins Kawakami
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Gustavo Souza Dos Santos
- Department of Biomolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Silvya Stuchi Maria-Engler
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Pio Colepicolo
- Department of Biochemistry, Chemistry Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Lorena Rigo Gaspar
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Hosana Maria Debonsi
- Department of Biomolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
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Figueroa D, Asaduzzaman M, Young F. Real time monitoring and quantification of reactive oxygen species in breast cancer cell line MCF-7 by 2′,7′–dichlorofluorescin diacetate (DCFDA) assay. J Pharmacol Toxicol Methods 2018; 94:26-33. [DOI: 10.1016/j.vascn.2018.03.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 03/16/2018] [Accepted: 03/27/2018] [Indexed: 12/11/2022]
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5
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Chan MH, Pan YT, Chan YC, Hsiao M, Chen CH, Sun L, Liu RS. Nanobubble-embedded inorganic 808 nm excited upconversion nanocomposites for tumor multiple imaging and treatment. Chem Sci 2018; 9:3141-3151. [PMID: 29732096 PMCID: PMC5916109 DOI: 10.1039/c8sc00108a] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 02/01/2018] [Indexed: 12/31/2022] Open
Abstract
Contrast reagents for ultrasound imaging are widely used in clinical medical diagnosis because ultrasound resolution is limited. Contrast agents must be utilized to enhance the image resolution. At present, microbubbles (MBs) and nanobubbles (NBs) are the main contrast reagent candidates for improving the signal resolution. Fluorescence upconversion nanoparticles provide high sensitivity and also function as nanocarriers. This can label tumor cells in a specific organ under irradiation of near-infrared (NIR) light. However, despite the use of NIR light, the penetration depth of NIR is only approximately 15 mm. Thus, we combine fluorescence with ultrasonic imaging to achieve the effect of multiple imaging and solve the low penetration depth of fluorescence imaging and the poor resolution of ultrasound imaging. The dual imaging modalities achieved higher resolution or signal to noise ratios. In this study, Nd3+-sensitized upconversion nanoparticles (UCNPs) are combined with graphitic carbon nitride quantum dots (CNs) and embedded in NBs (UCNP-CN@NBs). The UCNPs are excited by 808 nm light and emit visible and ultraviolet light. Then, the energy of the ultraviolet light is transferred to the CNs to produce reactive oxygen species (ROS) for photodynamic therapy. Ultrasonic waves are also used to promote NB bursting and the release of ROS molecules in photodynamic therapy, leading to cancer cell apoptosis.
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Affiliation(s)
- Ming-Hsien Chan
- Department of Chemistry , National Taiwan University , Taipei 106 , Taiwan .
| | - Yu-Ting Pan
- Department of Chemistry , National Taiwan University , Taipei 106 , Taiwan .
| | - Yung-Chieh Chan
- Genomics Research Center , Academia Sinica , Taipei 115 , Taiwan .
| | - Michael Hsiao
- Genomics Research Center , Academia Sinica , Taipei 115 , Taiwan . .,Department of Biochemistry , College of Medicine , Kaohsiung Medical University , Kaohsiung , 807 Taiwan
| | - Chung-Hsuan Chen
- Genomics Research Center , Academia Sinica , Taipei 115 , Taiwan .
| | - Lingdong Sun
- Beijing National Laboratory for Molecular Sciences , State Key Laboratory of Rare Earth Materials Chemistry and Applications , PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry , College of Chemistry and Molecular Engineering , Peking University , Beijing 100871 , China
| | - Ru-Shi Liu
- Department of Chemistry , National Taiwan University , Taipei 106 , Taiwan . .,Genomics Research Center , Academia Sinica , Taipei 115 , Taiwan . .,Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology , National Taipei University of Technology , Taipei , 106 Taiwan
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The novel heme-dependent inducible protein, SRRD regulates heme biosynthesis and circadian rhythms. Arch Biochem Biophys 2017; 631:19-29. [PMID: 28802827 DOI: 10.1016/j.abb.2017.08.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 07/24/2017] [Accepted: 08/07/2017] [Indexed: 12/17/2022]
Abstract
Heme plays a role in the regulation of the expression of genes related to circadian rhythms and heme metabolism. In order to identify new heme-regulated proteins, an RNA sequence analysis using mouse NIH3T3 cells treated without or with 5-aminolevulinic acid (ALA) was performed. Among the changes observed in the levels of various mRNAs including heme oxygenase-1 (HO-1) and ALA synthase-1 (ALAS1), a mouse homologue of the plant circadian-regulating protein SRR1, SRR1 domain containing (SRRD) was induced by the ALA treatment. The expression of SRRD was dependent on heme biosynthesis, and increased the production of heme. SRRD was expressed under circadian rhythms, and influenced the expression of clock genes including PER2, BMAL1, and CLOCK. The knockout of SRRD arrested the growth of cells, indicating that SRRD plays roles in heme-regulated circadian rhythms and cell proliferation.
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Takeda TA, Sasai M, Adachi Y, Ohnishi K, Fujisawa JI, Izawa S, Taketani S. Potential role of heme metabolism in the inducible expression of heme oxygenase-1. Biochim Biophys Acta Gen Subj 2017; 1861:1813-1824. [PMID: 28347842 DOI: 10.1016/j.bbagen.2017.03.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 03/06/2017] [Accepted: 03/23/2017] [Indexed: 01/17/2023]
Abstract
BACKGROUND The degradation of heme significantly contributes to cytoprotective effects against oxidative stress and inflammation. The enzyme heme oxygenase-1 (HO-1), involved in the degradation of heme, forms carbon monoxide (CO), ferrous iron, and bilirubin in conjunction with biliverdin reductase, and is induced by various stimuli including oxidative stress and heavy metals. We examined the involvement of heme metabolism in the induction of HO-1 by the inducers sulforaphane and sodium arsenite. METHODS We examined the expression of HO-1 in sulforaphane-, sodium arsenite- and CORM3-treated HEK293T cells, by measuring the transcriptional activity and levels of mRNA and protein. RESULTS The blockade of heme biosynthesis by succinylacetone and N-methyl protoporphyrin, which are inhibitors of heme biosynthesis, markedly decreased the induction of HO-1. The knockdown of the first enzyme in the biosynthesis of heme, 5-aminolevulinic acid synthase, also decreased the induction of HO-1. The cessation of HO-1 induction occurred at the transcriptional and translational levels, and was mediated by the activation of the heme-binding transcriptional repressor Bach1 and translational factor HRI. CO appeared to improve the expression of HO-1 at the transcriptional and translational levels. CONCLUSIONS We demonstrated the importance of heme metabolism in the stress-inducible expression of HO-1, and also that heme and its degradation products are protective factors for self-defense responses. GENERAL SIGNIFICANCE The key role of heme metabolism in the stress-inducible expression of HO-1 may promote further studies on heme and its degradation products as protective factors of cellular stresses and iron homeostasis in specialized cells, organs, and whole animal systems.
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Affiliation(s)
- Taka-Aki Takeda
- Department of Biotechnology, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8510, Japan
| | - Machiko Sasai
- Department of Biotechnology, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8510, Japan
| | - Yuka Adachi
- Department of Biotechnology, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8510, Japan
| | - Keiko Ohnishi
- Department of Biotechnology, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8510, Japan
| | - Jun-Ichi Fujisawa
- Department of Microbiology, Kansai Medical University, Hirakata, Osaka 573-8510, Japan
| | - Shingo Izawa
- Department of Biotechnology, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8510, Japan
| | - Shigeru Taketani
- Department of Biotechnology, Kyoto Institute of Technology, Sakyo-ku, Kyoto 606-8510, Japan; Unit of Research Complex, Kansai Medical University, Hirakata, Osaka 573-8510, Japan.
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Zhu C, Wang S, Wang B, Du F, Hu C, Li H, Feng Y, Zhu R, Mo M, Cao Y, Li A, Yu X. 17β-Estradiol up-regulates Nrf2 via PI3K/AKT and estrogen receptor signaling pathways to suppress light-induced degeneration in rat retina. Neuroscience 2015. [PMID: 26211446 DOI: 10.1016/j.neuroscience.2015.07.057] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Human age-related retinal diseases, such as age-related macular degeneration (AMD), are intimately associated with decreased tissue oxygenation and hypoxia. Different antioxidants have been investigated to reverse AMD. In the present study, we describe the antioxidant 17β-estradiol (βE2) and investigate its protective effects on retinal neurons. Fourteen days after ovariectomy, adult Sprague-Dawley rats were exposed to 8000-lux light for 12h to induce retinal degeneration. Reactive oxygen species (ROS) levels were assessed by confocal fluorescence microscopy using 2,7-dichlorofluorescein diacetate. Nuclear factor erythroid 2-related factor 2 (Nrf2) and antioxidant enzyme mRNA expression were detected by real-time PCR. Western blotting was used to evaluate NRF2 activation. NRF2 translocation was determined by immunohistochemistry, with morphological changes monitored by hematoxylin and eosin staining. Following light exposure, βE2 significantly reduced ROS production. βE2 also up-regulated NRF2 mRNA and protein levels, with maximal expression at 4 and 12h post-exposure, respectively. Interestingly, following βE2 administration, NRF2 was translocated from the cytoplasm to the nucleus, primarily in the outer nuclear layer. βE2 also up-regulated NRF2, which triggered phase-2 antioxidant enzyme expression (superoxide dismutases 1 and 2, catalase, glutaredoxins 1 and 2, and thioredoxins 1 and 2), reduced ROS production, and ameliorated retinal damage. However, the beneficial effects of βE2 were markedly suppressed by pretreatment with LY294002 or ICI182780, specific inhibitors of the phosphatidylinositol 3-kinase-Akt (PI3K/AKT), and estrogen receptor (ER) signaling pathways, respectively. Taken together, these observations suggest that βE2 exerts antioxidative effects following light-induced retinal degeneration potentially via NRF2 activation. This protective mechanism may depend on two pathways: a rapid, non-genomic-type PI3K/AKT response, and a genomic-type ER-dependent response. Our data provide evidence that βE2 is a potentially effective in the treatment of retinal degeneration diseases.
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Affiliation(s)
- C Zhu
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China; Department of Periodontology for Stomatology, Stomatological Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an 710004, China
| | - S Wang
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China
| | - B Wang
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China
| | - F Du
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China
| | - C Hu
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China
| | - H Li
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China
| | - Y Feng
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China
| | - R Zhu
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China
| | - M Mo
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China
| | - Y Cao
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China
| | - A Li
- Department of Periodontology for Stomatology, Stomatological Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an 710004, China; Research Center for Stomatology, Stomatological Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an 710004, China.
| | - X Yu
- Department of Genetics and Molecular Biology, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China; Environment and Genes Related to Diseases Key Laboratory of Education Ministry, School of Medicine, Xi'an Jiaotong University, Xi'an 710061, China.
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Wu KC, Liu JJ, Klaassen CD. Nrf2 activation prevents cadmium-induced acute liver injury. Toxicol Appl Pharmacol 2012; 263:14-20. [PMID: 22677785 DOI: 10.1016/j.taap.2012.05.017] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 05/23/2012] [Accepted: 05/25/2012] [Indexed: 02/07/2023]
Abstract
Oxidative stress plays an important role in cadmium-induced liver injury. Nuclear factor erythroid 2-related factor 2 (Nrf2) is a transcription factor that up-regulates cytoprotective genes in response to oxidative stress. To investigate the role of Nrf2 in cadmium-induced hepatotoxicity, Nrf2-null mice, wild-type mice, kelch-like ECH-associated protein 1-knockdown (Keap1-KD) mice with enhanced Nrf2, and Keap1-hepatocyte knockout (Keap1-HKO) mice with maximum Nrf2 activation were treated with cadmium chloride (3.5mg Cd/kg, i.p.). Blood and liver samples were collected 8h thereafter. Cadmium increased serum alanine aminotransferase (ALT) and lactate dehydrogenase (LDH) activities, and caused extensive hepatic hemorrhage and necrosis in the Nrf2-null mice. In contrast, Nrf2-enhanced mice had lower serum ALT and LDH activities and less morphological alternations in the livers than wild-type mice. H(2)DCFDA (2',7'-dichlorodihydrofluoresein diacetate) staining of primary hepatocytes isolated from the four genotypes of mice indicated that oxidative stress was higher in Nrf2-null cells, and lower in Nrf2-enhanced cells than in wild-type cells. To further investigate the mechanism of the protective effect of Nrf2, mRNA of metallothionein (MT) and other cytoprotective genes were determined. Cadmium markedly induced MT-1 and MT-2 in livers of all four genotypes of mice. In contrast, genes involved in glutathione synthesis and reducing reactive oxygen species, including glutamate-cysteine ligase (Gclc), glutathione peroxidase-2 (Gpx2), and sulfiredoxin-1 (Srxn-1) were only induced in Nrf2-enhanced mice, but not in Nrf2-null mice. In conclusion, the present study shows that Nrf2 activation prevents cadmium-induced oxidative stress and liver injury through induction of genes involved in antioxidant defense rather than genes that scavenge Cd.
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Affiliation(s)
- Kai C Wu
- Department of Pharmacology, Toxicology, and Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160, USA
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Mehanna C, Baudouin C, Brignole-Baudouin F. Spectrofluorometry assays for oxidative stress and apoptosis, with cell viability on the same microplates: A multiparametric analysis and quality control. Toxicol In Vitro 2011; 25:1089-96. [DOI: 10.1016/j.tiv.2011.03.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 03/04/2011] [Accepted: 03/11/2011] [Indexed: 10/18/2022]
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Ohgari Y, Miyata Y, Chau TT, Kitajima S, Adachi Y, Taketani S. Quinolone compounds enhance delta-aminolevulinic acid-induced accumulation of protoporphyrin IX and photosensitivity of tumour cells. J Biochem 2011; 149:153-160. [PMID: 20961864 DOI: 10.1093/jb/mvq126] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/08/2023] Open
Abstract
Exogenous δ-aminolevulinic acid (ALA)-induced photodynamic therapy (PDT) has been used in the treatment of cancer. To obtain a high efficacy of ALA-PDT, we have screened various chemicals affecting ALA-induced accumulation of protoporphyrin in cancerous cells. When HeLa cells were treated with quinolone chemicals including enoxacin, ciprofloxacin or norfloxacin, the ALA-induced photodamage accompanied by the accumulation of protoporphyrin was stronger than that with ALA alone. Thus, quinolone compounds such as enoxacin, ciprofloxacin and norfloxacin enhanced ALA-induced photodamage. The increased ALA-induced photodamage in enoxacin-treated HeLa cells was decreased by haemin or ferric-nitrilotriacetate (Fe-NTA), suggesting that an increase in iron supply cancels the accumulation of protoporphyrin. On the other hand, the treatment of the cells with ALA plus an inhibitor of haem oxygenase, Sn-protoporphyrin, led to an increase in the photodamage and the accumulation of protoporphyrin compared with those upon treatment with ALA alone, indicating that the cessation of recycling of iron from haem augments the accumulation. The use of quinolones plus Sn-protoporphyrin strongly enhances ALA-induced photodamage. To examine the mechanisms involved in the increased accumulation of protoporphyrin, we incubated ferric chloride with an equivalent amount of quinolones. Iron-quinolone complexes with visible colours with a maximum at 450 nm were formed. The levels of iron-metabolizing proteins in enoxacin- or ciprofloxacin-treated cells changed, indicating that quinolones decrease iron utilization for haem biosynthesis. Hence, we now propose that the use of quinolones in combination with ALA may be an extremely effective approach for the treatment modalities for PDT of various tumour tissues in clinical practice.
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Affiliation(s)
- Yoshiko Ohgari
- Department of Biotechnology, Kyoto Institute of Technology, Kyoto, Japan
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12
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Gao SS, Choi BM, Chen XY, Zhu RZ, Kim Y, So H, Park R, Sung M, Kim BR. Kaempferol suppresses cisplatin-induced apoptosis via inductions of heme oxygenase-1 and glutamate-cysteine ligase catalytic subunit in HEI-OC1 cell. Pharm Res 2010; 27:235-45. [PMID: 19937094 DOI: 10.1007/s11095-009-0003-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2009] [Accepted: 10/26/2009] [Indexed: 01/22/2023]
Abstract
PURPOSE The present study was undertaken to elucidate the chemoprotective mechanism of kaempferol, which possesses anti-oxidative and anti-apoptotic properties. METHODS House Ear Institute-Organ of Corti 1 (HEI-OC1) cells were treated with kaempferol in the presence or absence of cisplatin. Cisplatin-induced oxidative stress was assessed by analysis of Comet assay, DNA-laddering assay and activation of caspases. Heme oxygenase-1 (HO-1), mitogen-activated protein kinase (MAPK) pathway and nuclear factor-E2-related factor 2 (Nrf2) were measured by Western blot analysis. Transfection of small interfering RNAs (siRNA), glutathione (GSH) assay and RT-PCR were performed in this study. RESULTS Kaempferol protected cells against cisplatin-induced apoptosis in a dose-dependent manner in HEI-OC1 cells. Kaempferol-induced HO-1 expression protected against cell death though the c-Jun N-terminal kinase (JNK) pathway and by the aid of Nrf2 translocation. Kaempferol increased the cellular level of GSH and the expression of GCLC time-dependently. siRNA GCLC blocked the increase of GSH level by kaempferol and the protective effect of kaempferol against cisplatin-induced cell death. CONCLUSION The expression of HO-1 by kaempferol inhibits cisplatin-induced apoptosis in HEI-OC1 cells, and the mechanism of protective effect is also associated with its inductive effect of GCLC expression.
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Affiliation(s)
- Shang Shang Gao
- Vestibulocochlear Research Center and Department of Biochemistry, School of Medicine, Wonkwang University, Chonbuk, 570-749, Republic of Korea
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Intrinsic radiosensitivity correlated with radiation-induced ROS and cell cycle regulation. Mol Cell Toxicol 2010. [DOI: 10.1007/s13273-010-0001-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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14
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Chen X, Zhong Z, Xu Z, Chen L, Wang Y. 2′,7′-Dichlorodihydrofluorescein as a fluorescent probe for reactive oxygen species measurement: Forty years of application and controversy. Free Radic Res 2010; 44:587-604. [DOI: 10.3109/10715761003709802] [Citation(s) in RCA: 358] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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15
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Naranmandura H, Ogra Y, Iwata K, Lee J, Suzuki KT, Weinfeld M, Le XC. Evidence for toxicity differences between inorganic arsenite and thioarsenicals in human bladder cancer cells. Toxicol Appl Pharmacol 2009; 238:133-40. [DOI: 10.1016/j.taap.2009.05.006] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2009] [Revised: 04/17/2009] [Accepted: 05/04/2009] [Indexed: 11/15/2022]
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16
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Cui L, Yoshioka Y, Suyari O, Kohno Y, Zhang X, Adachi Y, Ikehara S, Yoshida T, Yamaguchi M, Taketani S. Relevant expression of Drosophila heme oxygenase is necessary for the normal development of insect tissues. Biochem Biophys Res Commun 2008; 377:1156-61. [PMID: 18983822 DOI: 10.1016/j.bbrc.2008.10.133] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2008] [Accepted: 10/22/2008] [Indexed: 11/17/2022]
Abstract
Heme oxygenase (HO) is a rate-limiting step of heme degradation, which catalyzes the conversion of heme into biliverdin, iron, and CO. HO has been characterized in micro-organisms, insects, plants, and mammals. The mammalian enzyme participates in adaptive and protective responses to oxidative stress and various inflammatory stimuli. The present study reports the use of RNA-interference (RNAi) to suppress HO in the multicellular eukaryote Drosophila. Eye imaginal disc-specific suppression of the Drosophila HO homolog (dHO) conferred serious abnormal eye morphology in adults. Deficiency of the dHO protein resulted in increased levels of iron and heme in larvae. The accumulation of iron was also observed in the compound eyes of dHO-knockdown adult flies. In parallel with the decrease of dHO, the expression of delta-aminolevulinic acid synthase, the first enzyme of the heme-biosynthetic pathway, in larvae was decreased markedly, suggesting that heme biosynthesis was totally suppressed by dHO-deficiency. The activation of caspase-3 occurred in eye imaginal discs of dHO-knockdown flies, indicating the occurrence of apoptosis in the discs. On the other hand, the overexpression of dHO resulted in a weak but significant rough eye phenotype in adults. Taken together, considering that dHO is not a stress-inducible protein, the expression of dHO can be tightly regulated at developmental stages and the relevant expression is necessary for the normal development of tissues in Drosophila.
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Affiliation(s)
- Lihua Cui
- Department of Biotechnology, Kyoto Institute of Technology, Kyoto 606-8585, Japan
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Morita K, Lee MS, Her S. Possible relation of hemin-induced HO-1 expression to the upregulation of VEGF and BDNF mRNA levels in rat C6 glioma cells. J Mol Neurosci 2008; 38:31-40. [PMID: 18937073 DOI: 10.1007/s12031-008-9156-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Accepted: 10/06/2008] [Indexed: 12/21/2022]
Abstract
Glial cells are generally considered to contribute to retaining the integrity of neural function through the protection of neuronal cells against neurodegenerative insults and also expected to play a potential role in the protection of cerebrovascular systems from various toxic insults of hemorrhaged blood, thus proposing a possible implication of glial cells in the recovery of brain function from the damage caused by cerebral hemorrhage. Based on this hypothetical idea, the direct effect of hemin on the expression of genes encoding heme oxygenase-1 (HO-1), vascular endothelial growth factor (VEGF), and brain-derived neurotrophic factor (BDNF) in glial cells was examined using rat C6 glioma cells as an in vitro model system. Hemin elevated both HO-1 and VEGF mRNA levels in the glioma cells at the concentration causing no critical damage to the cells, and the elevation of BDNF mRNA levels was also observed by exposing the cells to hemin under the same conditions. Furthermore, the elevation of VEGF and BDNF mRNA levels induced by hemin was blocked by pretreatment of the cells with the agents inhibiting not only HO-1 gene expression but also its enzymatic activity. These pharmacological studies indicate that hemin can induce the enhancement of VEGF and BDNF gene expression probably through the mechanism mediated by HO-1 activity in the glioma cells, proposing the possibility that glial cells are capable of contributing to the recovery of brain function from the damage caused by cerebral hemorrhage through the production of neurogenic and angiogenic factors.
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Affiliation(s)
- Kyoji Morita
- Laboratory of Neuropharmacology, Department of Nursing, Shikoku University School of Health Sciences, Ohjin, Tokushima, 771-1192, Japan.
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