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Deyneko DV, Lebedev VN, Barbaro K, Titkov VV, Lazoryak BI, Fadeeva IV, Gosteva AN, Udyanskaya IL, Aksenov SM, Rau JV. Antimicrobial and Cell-Friendly Properties of Cobalt and Nickel-Doped Tricalcium Phosphate Ceramics. Biomimetics (Basel) 2023; 9:14. [PMID: 38248588 PMCID: PMC10813436 DOI: 10.3390/biomimetics9010014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/24/2023] [Accepted: 12/27/2023] [Indexed: 01/23/2024] Open
Abstract
β-Tricalcium phosphate (β-TCP) is widely used as bone implant material. It has been observed that doping the β-TCP structure with certain cations can help in combating bacteria and pathogenic microorganisms. Previous literature investigations have focused on tricalcium phosphate structures with silver, copper, zinc, and iron cations. However, there are limited studies available on the biological properties of β-TCP containing nickel and cobalt ions. In this work, Ca10.5-xNix(PO4)7 and Ca10.5-xCox(PO4)7 solid solutions with the β-Ca3(PO4)2 structure were synthesized by a high-temperature solid-state reaction. Structural studies revealed the β-TCP structure becomes saturated at 9.5 mol/% for Co2+ or Ni2+ ions. Beyond this saturation point, Ni2+ and Co2+ ions form impurity phases after complete occupying of the octahedral M5 site. The incorporation of these ions into the β-TCP crystal structure delays the phase transition to the α-TCP phase and stabilizes the structure as the temperature increases. Biocompatibility tests conducted on adipose tissue-derived mesenchymal stem cells (aMSC) using the (3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide) (MTT) assay showed that all prepared samples did not exhibit cytotoxic effects. Furthermore, there was no inhibition of cell differentiation into the osteogenic lineage. Antibacterial properties were studied on the C. albicans fungus and on E. coli, E. faecalis, S. aureus, and P. aeruginosa bacteria strains. The Ni- and Co-doped β-TCP series exhibited varying degrees of bacterial growth inhibition depending on the doping ion concentration and the specific bacteria strain or fungus. The combination of antibacterial activity and cell-friendly properties makes these phosphates promising candidates for anti-infection bone substitute materials.
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Affiliation(s)
- Dina V. Deyneko
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (V.N.L.); (V.V.T.); (B.I.L.)
- Laboratory of Arctic Mineralogy and Material Sciences, Kola Science Centre RAS, 14 Fersman Str., 184209 Apatity, Russia;
| | - Vladimir N. Lebedev
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (V.N.L.); (V.V.T.); (B.I.L.)
| | - Katia Barbaro
- Istituto Zooprofilattico Sperimentale Lazio e Toscana “M. Aleandri”, Via Appia Nuova 1411, 00178 Rome, Italy;
| | - Vladimir V. Titkov
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (V.N.L.); (V.V.T.); (B.I.L.)
| | - Bogdan I. Lazoryak
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1, 119991 Moscow, Russia; (V.N.L.); (V.V.T.); (B.I.L.)
| | - Inna V. Fadeeva
- A.A. Baikov Institute of Metallurgy and Material Science, Russian Academy of Sciences, Leninsky Prospect 49, 119334 Moscow, Russia;
| | - Alevtina N. Gosteva
- Tananaev Institute of Chemistry, Kola Science Centre RAS, Akademgorodok 26A, 184209 Apatity, Russia;
| | - Irina L. Udyanskaya
- Department of Analytical, Physical and Colloid Chemistry, Institute of Pharmacy, I.M. Sechenov First Moscow State Medical University, Trubetskaya 8, Build. 2, 119048 Moscow, Russia;
| | - Sergey M. Aksenov
- Laboratory of Arctic Mineralogy and Material Sciences, Kola Science Centre RAS, 14 Fersman Str., 184209 Apatity, Russia;
- Geological Institute, Kola Science Centre, Russian Academy of Sciences, 14 Fersman Street, 184209 Apatity, Russia
| | - Julietta V. Rau
- Department of Analytical, Physical and Colloid Chemistry, Institute of Pharmacy, I.M. Sechenov First Moscow State Medical University, Trubetskaya 8, Build. 2, 119048 Moscow, Russia;
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy
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Ćwiertnia A, Kozłowski M, Cymbaluk-Płoska A. The Role of Iron and Cobalt in Gynecological Diseases. Cells 2022; 12:117. [PMID: 36611913 PMCID: PMC9818544 DOI: 10.3390/cells12010117] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 12/12/2022] [Accepted: 12/26/2022] [Indexed: 12/29/2022] Open
Abstract
Iron and cobalt are micronutrients that play an important role in the regulation of cellular processes, being part of the centre of catalases, peroxidases, cytochromes and metalloproteins such as hemoglobin and myoglobin (Fe). Cobalt primarily functions as a component of hydroxycobalamin, which is essential for regulating red blood cell production. Maintaining normal levels of cobalt and iron in the human body is important, as a deficiency can lead to anaemia. These elements are also involved in reactions during which oxidative stress occurs and are therefore considered to be a cause of tumor formation. This paper will discuss aspects of the influence of cobalt and iron on mechanisms that may contribute to the growth of gynecological tumors, as well as other obstetric-gynecological disease entities, by altering the conditions of the microenvironment. In addition, the following review also highlights the role of cobalt and iron in the treatment of gynecological tumors.
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Affiliation(s)
- Adrianna Ćwiertnia
- Department of Reconstructive Surgery and Gynecological Oncology, Pomeranian Medical University in Szczecin, Al. Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland
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Zheng H, Wang N, Li L, Ge L, Jia H, Fan Z. miR-140-3p enhanced the osteo/odontogenic differentiation of DPSCs via inhibiting KMT5B under hypoxia condition. Int J Oral Sci 2021; 13:41. [PMID: 34876565 PMCID: PMC8651682 DOI: 10.1038/s41368-021-00148-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 10/31/2021] [Accepted: 11/07/2021] [Indexed: 12/15/2022] Open
Abstract
Human dental pulp stem cells (DPSCs) have emerged as an important source of stem cells in the tissue engineering, and hypoxia will change various innate characteristics of DPSCs and then affect dental tissue regeneration. Nevertheless, little is known about the complicated molecular mechanisms. In this study, we aimed to investigate the influence and mechanism of miR-140-3p on DPSCs under hypoxia condition. Hypoxia was induced in DPSCs by Cobalt chloride (CoCl2) treatment. The osteo/dentinogenic differentiation capacity of DPSCs was assessed by alkaline phosphatase (ALP) activity, Alizarin Red S staining and main osteo/dentinogenic markers. A luciferase reporter gene assay was performed to verify the downstream target gene of miR-140-3p. This research exhibited that miR-140-3p promoted osteo/dentinogenic differentiation of DPSCs under normoxia environment. Furthermore, miR-140-3p rescued the CoCl2-induced decreased osteo/odontogenic differentiation potentials in DPSCs. Besides, we investigated that miR-140-3p directly targeted lysine methyltransferase 5B (KMT5B). Surprisingly, we found inhibition of KMT5B obviously enhanced osteo/dentinogenic differentiation of DPSCs both under normoxia and hypoxia conditions. In conclusion, our study revealed the role and mechanism of miR-140-3p for regulating osteo/dentinogenic differentiation of DPSCs under hypoxia, and discovered that miR-140-3p and KMT5B might be important targets for DPSC-mediated tooth or bone tissue regeneration.
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Affiliation(s)
- Han Zheng
- grid.24696.3f0000 0004 0369 153XLaboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - Ning Wang
- grid.24696.3f0000 0004 0369 153XLaboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - Le Li
- grid.12527.330000 0001 0662 3178Tsinghua University Hospital, Stomatological Disease Prevention and Control Center, Tsinghua University, Beijing, China
| | - Lihua Ge
- grid.24696.3f0000 0004 0369 153XLaboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China
| | - Haichao Jia
- Department of Orthodontics, Capital Medical University School of Stomatology, Beijing, China.
| | - Zhipeng Fan
- Laboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Capital Medical University School of Stomatology, Beijing, China. .,Research Unit of Tooth Development and Regeneration, Chinese Academy of Medical Sciences, Beijing, China.
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Li J, Zhao C, Liu C, Wang Z, Ling Z, Lin B, Tan B, Zhou L, Chen Y, Liu D, Zou X, Liu W. Cobalt-doped bioceramic scaffolds fabricated by 3D printing show enhanced osteogenic and angiogenic properties for bone repair. Biomed Eng Online 2021; 20:70. [PMID: 34303371 PMCID: PMC8306242 DOI: 10.1186/s12938-021-00907-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/15/2021] [Indexed: 11/22/2022] Open
Abstract
Background The bone regeneration of artificial bone grafts is still in need of a breakthrough to improve the processes of bone defect repair. Artificial bone grafts should be modified to enable angiogenesis and thus improve osteogenesis. We have previously revealed that crystalline Ca10Li(PO4)7 (CLP) possesses higher compressive strength and better biocompatibility than that of pure beta-tricalcium phosphate (β-TCP). In this work, we explored the possibility of cobalt (Co), known for mimicking hypoxia, doped into CLP to promote osteogenesis and angiogenesis. Methods We designed and manufactured porous scaffolds by doping CLP with various concentrations of Co (0, 0.1, 0.25, 0.5, and 1 mol%) and using 3D printing techniques. The crystal phase, surface morphology, compressive strength, in vitro degradation, and mineralization properties of Co-doped and -undoped CLP scaffolds were investigated. Next, we investigated the biocompatibility and effects of Co-doped and -undoped samples on osteogenic and angiogenic properties in vitro and on bone regeneration in rat cranium defects. Results With increasing Co-doping level, the compressive strength of Co-doped CLP scaffolds decreased in comparison with that of undoped CLP scaffolds, especially when the Co-doping concentration increased to 1 mol%. Co-doped CLP scaffolds possessed excellent degradation properties compared with those of undoped CLP scaffolds. The (0.1, 0.25, 0.5 mol%) Co-doped CLP scaffolds had mineralization properties similar to those of undoped CLP scaffolds, whereas the 1 mol% Co-doped CLP scaffolds shown no mineralization changes. Furthermore, compared with undoped scaffolds, Co-doped CLP scaffolds possessed excellent biocompatibility and prominent osteogenic and angiogenic properties in vitro, notably when the doping concentration was 0.25 mol%. After 8 weeks of implantation, 0.25 mol% Co-doped scaffolds had markedly enhanced bone regeneration at the defect site compared with that of the undoped scaffold. Conclusion In summary, CLP doped with 0.25 mol% Co2+ ions is a prospective method to enhance osteogenic and angiogenic properties, thus promoting bone regeneration in bone defect repair. Supplementary Information The online version contains supplementary material available at 10.1186/s12938-021-00907-2.
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Affiliation(s)
- Jungang Li
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Chaoqian Zhao
- Key Laboratory of Optoelectronic Materials Chemical and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
| | - Chun Liu
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Zhenyu Wang
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Zeming Ling
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Bin Lin
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Bizhi Tan
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Linquan Zhou
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Yan Chen
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Delong Liu
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xuenong Zou
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China.
| | - Wenge Liu
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China.
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Tsai T, Mueller-Buehl AM, Satgunarajah Y, Kuehn S, Dick HB, Joachim SC. Protective effect of the extremolytes ectoine and hydroxyectoine in a porcine organ culture. Graefes Arch Clin Exp Ophthalmol 2020; 258:2185-2203. [PMID: 32710140 PMCID: PMC8478759 DOI: 10.1007/s00417-020-04854-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 06/17/2020] [Accepted: 07/15/2020] [Indexed: 02/07/2023] Open
Abstract
Purpose Hypoxic damage to the retina is a relevant component of neurodegenerative pathologies such as glaucoma or retinal ischemia. In porcine retina organ cultures, hypoxic damage can be induced by applying cobalt chloride (CoCl2). The aim of our study was to investigate possible neuroprotective effects of the extremolytes ectoine and hydroxyectoine in this hypoxia-damaged retina model. Methods To simulate hypoxia, porcine retina organ cultures were damaged with 300 μM CoCl2 for 48 h starting on day 1 (n = 8–9/group). In order to investigate the possible neuroprotective effects of ectoine and hydroxyectoine, 0.5 mM of each extremolyte was added to the culture at the same time as the stressor and for the same duration. On day 8, the retina organ cultures were taken for (immuno)-histochemical examinations. Retinal ganglion cells (RGCs), macroglia, and apoptotic and hypoxic cells were detected with appropriate markers followed by cell counts and group comparisons. Results Treatment with ectoine resulted in RGC protection (p < 0.05) and reduced rate of apoptosis (p < 0.001) in hypoxia-treated retina organ cultures. However, the macroglia area and the amount of hypoxic, HIF-1α+ cells were unaffected by the ectoine treatment (p = 0.99). Treatment with hydroxyectoine also protected RGCs (p < 0.01) by inhibiting apoptosis (p < 0.001). In addition, the number of hypoxic, HIF-1α+ cells could be significantly reduced by treatment with hydroxyectoine (p < 0.05). The macroglia area on the other hand was unchanged after CoCl2 and treatment with hydroxyectoine. Conclusion Both extremolytes had a protective effect on CoCl2-induced hypoxia in the porcine retina organ culture. Regarding the reduction of hypoxic stress, hydroxyectoine appears to be more effective. Thus, both extremolytes represent an interesting potential new therapeutic approach for patients with ocular diseases in which hypoxic processes play a significant role.
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Affiliation(s)
- Teresa Tsai
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892, Bochum, Germany
| | - Ana M Mueller-Buehl
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892, Bochum, Germany
| | - Yathavan Satgunarajah
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892, Bochum, Germany
| | - Sandra Kuehn
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892, Bochum, Germany
| | - H Burkhard Dick
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892, Bochum, Germany
| | - Stephanie C Joachim
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892, Bochum, Germany.
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Hurst J, Mueller-Buehl AM, Hofmann L, Kuehn S, Herms F, Schnichels S, Joachim SC. iNOS-inhibitor driven neuroprotection in a porcine retina organ culture model. J Cell Mol Med 2020; 24:4312-4323. [PMID: 32130787 PMCID: PMC7171393 DOI: 10.1111/jcmm.15091] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 01/24/2020] [Accepted: 02/04/2020] [Indexed: 12/12/2022] Open
Abstract
Nitrite oxide plays an important role in the pathogenesis of various retinal diseases, especially when hypoxic processes are involved. This degeneration can be simulated by incubating porcine retinal explants with CoCl2. Here, the therapeutic potential of iNOS‐inhibitor 1400W was evaluated. Degeneration through CoCl2 and treatment with the 1400W were applied simultaneously to porcine retinae explants. Three groups were compared: control, CoCl2, and CoCl2 + iNOS‐inhibitor (1400W). At days 4 and 8, retinal ganglion cells (RGCs), bipolar, and amacrine cells were analysed. Furthermore, the influence on the glia cells and different stress markers were evaluated. Treatment with CoCl2 resulted in a significant loss of RGCs already after 4 days, which was counteracted by the iNOS‐inhibitor. Expression of HIF‐1α and its downstream targets confirmed the effective treatment with 1400W. After 8 days, the CoCl2 group displayed a significant loss in amacrine cells and also a drastic reduction in bipolar cells was observed, which was prevented by 1400W. The decrease in microglia could not be prevented by the inhibitor. CoCl2 induces strong degeneration in porcine retinae by mimicking hypoxia, damaging certain retinal cell types. Treatment with the iNOS‐inhibitor counteracted these effects to some extent, by preventing loss of retinal ganglion and bipolar cells. Hence, this inhibitor seems to be a very promising treatment for retinal diseases.
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Affiliation(s)
- José Hurst
- Centre for Ophthalmology Tübingen, University Eye Hospital, Tübingen, Germany
| | - Ana Maria Mueller-Buehl
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Lisa Hofmann
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Sandra Kuehn
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Fenja Herms
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Sven Schnichels
- Centre for Ophthalmology Tübingen, University Eye Hospital, Tübingen, Germany
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Kang YB(A, Eo J, Bulutoglu B, Yarmush ML, Usta OB. Progressive hypoxia-on-a-chip: An in vitro oxygen gradient model for capturing the effects of hypoxia on primary hepatocytes in health and disease. Biotechnol Bioeng 2020; 117:763-775. [PMID: 31736056 PMCID: PMC7015781 DOI: 10.1002/bit.27225] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 10/07/2019] [Accepted: 11/12/2019] [Indexed: 12/19/2022]
Abstract
Oxygen is vital to the function of all tissues including the liver and lack of oxygen, that is, hypoxia can result in both acute and chronic injuries to the liver in vivo and ex vivo. Furthermore, a permanent oxygen gradient is naturally present along the liver sinusoid, which plays a role in the metabolic zonation and the pathophysiology of liver diseases. Accordingly, here, we introduce an in vitro microfluidic platform capable of actively creating a series of oxygen concentrations on a single continuous microtissue, ranging from normoxia to severe hypoxia. This range approximately captures both the physiologically relevant oxygen gradient generated from the portal vein to the central vein in the liver, and the severe hypoxia occurring in ischemia and liver diseases. Primary rat hepatocytes cultured in this microfluidic platform were exposed to an oxygen gradient of 0.3-6.9%. The establishment of an ascending hypoxia gradient in hepatocytes was confirmed in response to the decreasing oxygen supply. The hepatocyte viability in this platform decreased to approximately 80% along the hypoxia gradient. Simultaneously, a progressive increase in accumulation of reactive oxygen species and expression of hypoxia-inducible factor 1α was observed with increasing hypoxia. These results demonstrate the induction of distinct metabolic and genetic responses in hepatocytes upon exposure to an oxygen (/hypoxia) gradient. This progressive hypoxia-on-a-chip platform can be used to study the role of oxygen and hypoxia-associated molecules in modeling healthy and injured liver tissues. Its use can be further expanded to the study of other hypoxic tissues such as tumors as well as the investigation of drug toxicity and efficacy under oxygen-limited conditions.
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Affiliation(s)
- Young Bok (Abraham) Kang
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and Shriners Hospitals for Children-Boston, Boston, MA, USA
- College of Engineering, George Fox University, Newberg, OR, USA
| | - Jinsu Eo
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and Shriners Hospitals for Children-Boston, Boston, MA, USA
| | - Beyza Bulutoglu
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and Shriners Hospitals for Children-Boston, Boston, MA, USA
| | - Martin L. Yarmush
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and Shriners Hospitals for Children-Boston, Boston, MA, USA
- Department of Biomedical Engineering, Rutgers University, Piscataway, NJ, USA
| | - O. Berk Usta
- Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, and Shriners Hospitals for Children-Boston, Boston, MA, USA
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Liu L, Sha XY, Wu YN, Chen MT, Zhong JX. Lycium barbarum polysaccharides protects retinal ganglion cells against oxidative stress injury. Neural Regen Res 2020; 15:1526-1531. [PMID: 31997818 PMCID: PMC7059572 DOI: 10.4103/1673-5374.274349] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The accumulation of excessive reactive oxygen species can exacerbate any injury of retinal tissue because free radicals can trigger lipid peroxidation, protein damage and DNA fragmentation. Increased oxidative stress is associated with the common pathological process of many eye diseases, such as glaucoma, diabetic retinopathy and ischemic optic neuropathy. Many studies have demonstrated that Lycium barbarum polysaccharides (LBP) protects against oxidative injury in numerous cells and tissues. For the model of hypoxia we used cultured retinal ganglion cells and induced hypoxia by incubating with 200 µM cobalt chloride (CoCl2) for 24 hours. To investigate the protective effect of LBP and its mechanism of action against oxidative stress injury, the retinal tissue was pretreated with 0.5 mg/mL LBP for 24 hours. The results of flow cytometric analysis showed LBP could effectively reduce the CoCl2-induced retinal ganglion cell apoptosis, inhibited the generation of reactive oxygen species and the reduction of mitochondrial membrane potential. These findings suggested that LBP could protect retinal ganglion cells from CoCl2-induced apoptosis by reducing mitochondrial membrane potential and reactive oxygen species.
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Affiliation(s)
- Lian Liu
- Department of Ophthalmology, Affiliated First Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Xiao-Yuan Sha
- Department of Ophthalmology, Affiliated First Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Yi-Ning Wu
- Department of Ophthalmology, Guangdong Women and Children Hospital, Guangzhou, Guangdong Province, China
| | - Meng-Ting Chen
- Department of Ophthalmology, Affiliated First Hospital of Jinan University, Guangzhou, Guangdong Province, China
| | - Jing-Xiang Zhong
- Department of Ophthalmology, Affiliated First Hospital of Jinan University, Guangzhou, Guangdong Province, China
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Neuregulin-1 Protects Neuronal Cells Against Damage due to CoCl2-Induced Hypoxia by Suppressing Hypoxia-Inducible Factor-1α and P53 in SH-SY5Y Cells. Int Neurourol J 2019; 23:S111-118. [PMID: 31795610 PMCID: PMC6905208 DOI: 10.5213/inj.1938190.095] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 11/18/2019] [Indexed: 12/11/2022] Open
Abstract
Purpose Hypoxia-mediated neurotoxicity contributes to various neurodegenerative disorders, including Alzheimer disease. Neuregulin-1 (NRG1) plays an important role in the development and plasticity of the brain. The aim of the present study was to investigate the neuroprotective effect and the regulating hypoxic inducible factor of NRG1 in cobalt chloride (CoCl2) induced hypoxia. Methods Hypoxia was induced in SH-SY5Y cells by CoCl2 treatment. SH-SY5Y cells were pretreated with NRG1 and then treated with CoCl2. Western blotting, immunocytochemistry, and lactate dehydrogenase (LDH) release assays were performed to examine neuroprotective properties of NRG1 in SH-SY5Y cells. Results Our data showed that CoCl2 induced cytotoxicity and changes of hypoxia-inducible factor-1α (HIF-1α) and p53 expression in SH-SY5Y cells. However, pretreatment with NRG1 inhibited CoCl2-induced accumulation of HIF-1α and p53 stability. In addition, NRG1 significantly attenuated cell death of SH-SY5Y induced by CoCl2. Conclusions NRG1 can regulate HIF-1α and p53 to protect neurons against hypoxic damage.
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Design of Phthalocyanine‐Nanoparticle Hybrids for Photodynamic Therapy Applications in Oxygen‐Deficient Tumour Environment. ChemistrySelect 2019. [DOI: 10.1002/slct.201901466] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Maliha AM, Kuehn S, Hurst J, Herms F, Fehr M, Bartz-Schmidt KU, Dick HB, Joachim SC, Schnichels S. Diminished apoptosis in hypoxic porcine retina explant cultures through hypothermia. Sci Rep 2019; 9:4898. [PMID: 30894574 PMCID: PMC6427006 DOI: 10.1038/s41598-019-41113-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 02/13/2019] [Indexed: 12/22/2022] Open
Abstract
Simulation of hypoxic processes in vitro can be achieved through cobalt chloride (CoCl2), which induces strong neurodegeneration. Hypoxia plays an important role in the progression of several retinal diseases. Thus, we investigated whether hypoxia can be reduced by hypothermia. Porcine retinal explants were cultivated for four and eight days and hypoxia was mimicked by adding 300 µM CoCl2 from day one to day three. Hypothermia treatment (30 °C) was applied simultaneously. Retinal ganglion, bipolar and amacrine cells, as well as microglia were evaluated via immunohistological and western blot analysis. Furthermore, quantitative real-time PCR was performed to analyze cellular stress and apoptosis. In addition, the expression of specific marker for the previously described cell types were investigated. A reduction of ROS and stress markers HSP70, iNOS, HIF-1α was achieved via hypothermia. In accordance, an inhibition of apoptotic proteins (caspase 3, caspase 8) and the cell cycle arrest gene p21 was found in hypothermia treated retinae. Furthermore, neurons of the inner retina were protected by hypothermia. In this study, we demonstrate that hypothermia lowers hypoxic processes and cellular stress. Additionally, hypothermia inhibits apoptosis and protects neurons. Hence, this seems to be a promising treatment for retinal neurodegeneration.
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Affiliation(s)
- Ana M Maliha
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Sandra Kuehn
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - José Hurst
- University Eye Hospital Tübingen, Centre for Ophthalmology Tübingen, Tübingen, Germany
| | - Fenja Herms
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
- Clinic for Small Animals, University of Veterinary Medicine, Hannover, Germany
| | - Michael Fehr
- Clinic for Small Animals, University of Veterinary Medicine, Hannover, Germany
| | - Karl U Bartz-Schmidt
- University Eye Hospital Tübingen, Centre for Ophthalmology Tübingen, Tübingen, Germany
| | - H Burkhard Dick
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany
| | - Stephanie C Joachim
- Experimental Eye Research Institute, University Eye Hospital, Ruhr-University Bochum, Bochum, Germany.
| | - Sven Schnichels
- University Eye Hospital Tübingen, Centre for Ophthalmology Tübingen, Tübingen, Germany.
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12
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Zheng Y, Yang Y, Deng Y. Dual therapeutic cobalt-incorporated bioceramics accelerate bone tissue regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:770-782. [PMID: 30889752 DOI: 10.1016/j.msec.2019.02.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 01/16/2019] [Accepted: 02/06/2019] [Indexed: 01/28/2023]
Abstract
Bone grafting on defects caused by trauma or tumor stimulates bone regeneration, a complex process requiring highly orchestrated cell-signal interactions. Bone vascular growth is coupled with osteogenesis, but less is known about the interplay between angiogenesis and osteogenesis. Understanding this relationship is relevant to improved bone regeneration. Here, tricalcium phosphate (TCP) scaffolds doped with varying concentration of cobalt (Co-TCP) were designed to investigate the dosage effect of vascularization on bone formation. The surface structure, phase composition, mechanical features, and chemical composition were investigated. Co doping improved the mechanical properties of TCP. Co-TCP, particularly 2% and 5% Co-TCP, boosted cell viability of bone marrow stromal cells (BMSCs). The 2% Co-TCP promoted alkaline phosphatase activity, matrix mineralization, and expression of osteogenic genes in BMSCs in vitro. However, excessive Co doping decreased TCP-induced osteogenesis. Meanwhile, Co-TCP dose-dependently favored the growth and migration of human umbilical vein endothelial cells (HUVECs), and the expression of vascular endothelial growth factor (VEGF). The 2% Co-TCP significantly shrank the defect area in rat alveolar bone compared with TCP. Smaller bone volume and more abundant blood vessels were observed for 5% Co-TCP compared with 2% Co-TCP. The CD31 immunostaining in the 5% Co-TCP group was more intense than the other two groups, indicating of the increment of endothelium cells. Besides, 5% Co-TCP led to mild inflammatory response in bone defect area. Overall, TCP doped appropriately with Co has positive effect on osteogenesis, while excessive Co suppressed osteoblast differentiation and bone formation. These data indicate that vascularization within a proper range promotes osteogenesis, which may be a design consideration for bone grafts.
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Affiliation(s)
- Yunfei Zheng
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China
| | - Yuanyi Yang
- Department of Materials Engineering, Sichuan College of Architectural Technology, Deyang 618000, China
| | - Yi Deng
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China; Department of Mechanical Engineering, The University of Hong Kong, Hong Kong SAR, China.
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13
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Di Sotto A, Di Giacomo S, Amatore D, Locatelli M, Vitalone A, Toniolo C, Rotino GL, Lo Scalzo R, Palamara AT, Marcocci ME, Nencioni L. A Polyphenol Rich Extract from Solanum melongena L. DR2 Peel Exhibits Antioxidant Properties and Anti-Herpes Simplex Virus Type 1 Activity In Vitro. Molecules 2018; 23:E2066. [PMID: 30126139 PMCID: PMC6222547 DOI: 10.3390/molecules23082066] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 08/13/2018] [Accepted: 08/14/2018] [Indexed: 12/21/2022] Open
Abstract
DR2B and DR2C extracts, obtained by ethanolic maceration of peel from commercially and physiologically ripe aubergine berries, were studied for the antioxidative cytoprotective properties and anti-HSV-1 activity, in line with the evidence that several antioxidants can impair viral replication by maintaining reducing conditions in host cells. The antioxidative cytoprotective effects against tBOOH-induced damage were assessed in Caco2 cells, while antiviral activity was studied in Vero cells; polyphenolic fingerprints were characterized by integrated phytochemical methods. Results highlighted different compositions of the extracts, with chlorogenic acid and delphinidin-3-rutinoside as the major constituents; other peculiar phytochemicals were also identified. Both samples reduced reactive oxygen species (ROS) production and exhibited scavenging and chelating properties. DR2C partly counteracted the tBOOH-induced cytotoxicity, with a remarkable lowering of lactate metabolism under both normoxia and hypoxia; interestingly, it increased intracellular GSH levels. Furthermore, DR2C inhibited the HSV-1 replication when added for 24 h after viral adsorption, as also confirmed by the reduction of many viral proteins' expression. Since DR2C was able to reduce NOX4 expression during HSV-1 infection, its antiviral activity may be correlated to its antioxidant properties. Although further studies are needed to better characterize DR2C activity, the results suggest this extract as a promising new anti-HSV-1 agent.
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Affiliation(s)
- Antonella Di Sotto
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Silvia Di Giacomo
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Donatella Amatore
- Department of Public Health and Infectious Diseases, Istituto Pasteur Italia-Fondazione Cenci-Bolognetti, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Marcello Locatelli
- Department of Pharmacy, University "G. D'Annunzio" of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy.
| | - Annabella Vitalone
- Department of Physiology and Pharmacology "V. Erspamer", Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Chiara Toniolo
- Department of Environmental Biology, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Giuseppe Leonardo Rotino
- Research Centre for Genomics and Bioinformatics (CREA-GB), Via Paullese 28, Lodi, 26836 Montanaso Lombardo, Italy.
| | - Roberto Lo Scalzo
- Research Centre for Engineering and Agro-Food Processing (CREA-IT), Via Venezian 26, 20133 Milan, Italy.
| | - Anna Teresa Palamara
- Department of Public Health and Infectious Diseases, Istituto Pasteur Italia-Fondazione Cenci-Bolognetti, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Maria Elena Marcocci
- Department of Public Health and Infectious Diseases, Istituto Pasteur Italia-Fondazione Cenci-Bolognetti, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Lucia Nencioni
- Department of Public Health and Infectious Diseases, Istituto Pasteur Italia-Fondazione Cenci-Bolognetti, Sapienza University, P.le Aldo Moro 5, 00185 Rome, Italy.
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14
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Silakit R, Kitirat Y, Thongchot S, Loilome W, Techasen A, Ungarreevittaya P, Khuntikeo N, Yongvanit P, Yang JH, Kim NH, Yook JI, Namwat N. Potential role of HIF-1-responsive microRNA210/HIF3 axis on gemcitabine resistance in cholangiocarcinoma cells. PLoS One 2018; 13:e0199827. [PMID: 29953500 PMCID: PMC6023215 DOI: 10.1371/journal.pone.0199827] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 06/14/2018] [Indexed: 01/07/2023] Open
Abstract
MicroRNA-210 (miR-210) is a robust target for hypoxia-inducible factor, and its overexpression has been detected in a variety of solid tumors. However, the role of miR-210 in the development, progression and response to therapy in cholangiocarcinoma (CCA) remains undefined. We report here that high miR-210 expression was significantly correlated with the shorter survival of CCA patients. Overexpression of miR-210 inhibited CCA cell proliferation at the G2/M phase and reduced the gemcitabine sensitivity in CCA cells under CoCl2-induced pseudohypoxia. Concomitantly, inhibition of endogenous miR-210 activity using miRNA sponges increased cell proliferation under CoCl2-induced pseudohypoxia, resulting in an increase in gemcitabine sensitivity in CCA cells. We showed that HIF-3α, a negative controller of HIF-1α, was a target of miR-210 constituting a feed-forward hypoxic regulatory loop. Our data suggest an important role of miR-210 in sustaining HIF-1α activity via the suppression of HIF-3α, regulating cell growth and chemotherapeutic drug resistance in CCA.
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Affiliation(s)
- Runglawan Silakit
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
| | - Yingpinyapat Kitirat
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
| | - Suyanee Thongchot
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
| | - Watcharin Loilome
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
| | - Anchalee Techasen
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
- Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand
| | - Piti Ungarreevittaya
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
- Department of Pathology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Narong Khuntikeo
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
- Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Puangrat Yongvanit
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
| | - Ji Hye Yang
- Department of Oral Pathology, Oral Cancer Research Institute, College of Dentistry, Yonsei University, Seoul, Korea
| | - Nam Hee Kim
- Department of Oral Pathology, Oral Cancer Research Institute, College of Dentistry, Yonsei University, Seoul, Korea
| | - Jong In Yook
- Department of Oral Pathology, Oral Cancer Research Institute, College of Dentistry, Yonsei University, Seoul, Korea
- * E-mail: (NN); (JIY)
| | - Nisana Namwat
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, Thailand
- * E-mail: (NN); (JIY)
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15
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Zhou J, Li C, Yao W, Alsiddig MC, Huo L, Liu H, Miao YL. Hypoxia-inducible factor-1α-dependent autophagy plays a role in glycolysis switch in mouse granulosa cells†. Biol Reprod 2018; 99:308-318. [DOI: 10.1093/biolre/ioy061] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 03/09/2018] [Indexed: 12/11/2022] Open
Affiliation(s)
- Jilong Zhou
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China
| | - Chengyu Li
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Wang Yao
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - M C Alsiddig
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Lijun Huo
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China
| | - Honglin Liu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Yi-Liang Miao
- Institute of Stem Cell and Regenerative Biology, College of Animal Science and Veterinary Medicine, Huazhong Agricultural University, Wuhan, China
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction (Huazhong Agricultural University), Ministry of Education, Wuhan, China
- The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, China
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16
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Fang Z, Luo W, Luo Y. Protective effect of α-mangostin against CoCl2-induced apoptosis by suppressing oxidative stress in H9C2 rat cardiomyoblasts. Mol Med Rep 2018; 17:6697-6704. [PMID: 29512772 DOI: 10.3892/mmr.2018.8680] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 02/01/2018] [Indexed: 12/07/2022] Open
Abstract
Garcinia mangostana (a fruit) has been commonly used as a traditional drug in the treatment of various types of diseases. The aim of the present study was to evaluate the potential protective effect of α‑mangostin (α‑MG), a primary constituent extracted from the hull of the G. mangostana fruit (mangosteen), against CoCl2‑induced apoptotic damage in H9C2 rat cardiomyoblasts. α‑MG was demonstrated to significantly improve the viability of the CoCl2‑treated cells by up to 79.6%, attenuating CoCl2‑induced damage. Further studies revealed that α‑MG exerted a positive effect in terms of decreased reactive oxygen species generation, malondialdehyde concentration, cellular apoptosis, and increased superoxide dismutase activity. Furthermore, treatment with CoCl2 increased the cleavage of caspase‑9, caspase‑3 and apoptosis regulator BAX, and reduced apoptosis regulator Bcl‑2 in H9C2 cells, as measured by reverse transcription‑quantitative polymerase chain reaction and western blotting, which were significantly reversed by co‑treatment with α‑MG (0.06 and 0.3 mM). In conclusion, these results demonstrated that α‑MG protects H9C2 cells against CoCl2‑induced hypoxic injury, indicating that α‑MG is a potential therapeutic agent for cardiac hypoxic injury.
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Affiliation(s)
- Zhao Fang
- Department of Cardiovascular Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Wanjun Luo
- Department of Cardiovascular Surgery, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
| | - Yanli Luo
- International Medical Center, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China
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17
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Azman AS, Othman I, Fang CM, Chan KG, Goh BH, Lee LH. Antibacterial, Anticancer and Neuroprotective Activities of Rare Actinobacteria from Mangrove Forest Soils. Indian J Microbiol 2017; 57:177-187. [PMID: 28611495 PMCID: PMC5446825 DOI: 10.1007/s12088-016-0627-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 10/11/2016] [Indexed: 10/20/2022] Open
Abstract
Mangrove is a complex ecosystem that contains diverse microbial communities, including rare actinobacteria with great potential to produce bioactive compounds. To date, bioactive compounds extracted from mangrove rare actinobacteria have demonstrated diverse biological activities. The discovery of three novel rare actinobacteria by polyphasic approach, namely Microbacterium mangrovi MUSC 115T, Sinomonas humi MUSC 117T and Monashia flava MUSC 78T from mangrove soils at Tanjung Lumpur, Peninsular Malaysia have led to the screening on antibacterial, anticancer and neuroprotective activities. A total of ten different panels of bacteria such as Methicillin-resistant Staphylococcus aureus (MRSA) ATCC 43300, ATCC 70069, Pseudomonas aeruginosa NRBC 112582 and others were selected for antibacterial screening. Three different neuroprotective models (hypoxia, oxidative stress, dementia) were done using SHSY5Y neuronal cells while two human cancer cells lines, namely human colon cancer cell lines (HT-29) and human cervical carcinoma cell lines (Ca Ski) were utilized for anticancer activity. The result revealed that all extracts exhibited bacteriostatic effects on the bacteria tested. On the other hand, the neuroprotective studies demonstrated M. mangrovi MUSC 115T extract exhibited significant neuroprotective properties in oxidative stress and dementia model while the extract of strain M. flava MUSC 78T was able to protect the SHSY5Y neuronal cells in hypoxia model. Furthermore, the extracts of M. mangrovi MUSC 115T and M. flava MUSC 78T exhibited anticancer effect against Ca Ski cell line. The chemical analysis of the extracts through GC-MS revealed that the majority of the compounds present in all extracts are heterocyclic organic compound that could explain for the observed bioactivities. Therefore, the results obtained in this study suggested that rare actinobacteria discovered from mangrove environment could be potential sources of antibacterial, anticancer and neuroprotective agents.
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Affiliation(s)
- Adzzie-Shazleen Azman
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan Malaysia
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Malaysia
| | - Iekhsan Othman
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Malaysia
| | - Chee-Mun Fang
- School of Pharmacy, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor Malaysia
| | - Kok-Gan Chan
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Bey-Hing Goh
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan Malaysia
- Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
| | - Learn-Han Lee
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor Darul Ehsan Malaysia
- Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
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18
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Kuehn S, Hurst J, Rensinghoff F, Tsai T, Grauthoff S, Satgunarajah Y, Dick HB, Schnichels S, Joachim SC. Degenerative effects of cobalt-chloride treatment on neurons and microglia in a porcine retina organ culture model. Exp Eye Res 2017; 155:107-120. [PMID: 28089775 DOI: 10.1016/j.exer.2017.01.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 12/20/2016] [Accepted: 01/11/2017] [Indexed: 01/08/2023]
Abstract
In order to understand the pathological processes of retinal diseases, experimental models are necessary. Cobalt, as part of the vitamin B12 complex, is important for neuronal integrity. However, it is known that high quantities of cobalt induce cytotoxic mechanisms via hypoxia mimicry. Therefore, we tested the degenerative effect of cobalt chloride (CoCl2) on neurons and microglia in a porcine retina organ culture model. Organotypic cultures of porcine retinas were cultured and treated with different concentrations of CoCl2 (0, 100, 300 and 500 μM) for 48 h. After four and eight days, CoCl2 induced a strong degeneration of the porcine retina, starting at 300 μM. A loss of retinal ganglion cells (RGCs, Brn-3a), amacrine cells (calretinin) and bipolar cells (PKCα) was observed. Additionally, a high expression of hypoxia induced factor-1a (HIF-1a) and heat shock protein 70 (HSP70) was noted at both points in time. Also, the Caspase 3 protein was activated and P21 expression was induced. However, only at day four, the Bax/Bcl-2 ratio was increased. The effect of CoCl2 was not restricted to neurons. CoCl2 concentrations reduced the microglia amount (Iba1) and activity (Iba1 + Fcγ-Receptor) at both points in time. These damaging effects on microglia were surprising, since CoCl2 causes hypoxia and a pro-inflammatory environment. However, high concentrations of CoCl2 also seem to be toxic to these cells. Similar degenerative mechanisms as in comparison to retinal ischemia animal models were observed. In summary, an effective and reproducible hypoxia-mimicking organotypic model for retinal degeneration was established, which is easy to handle and ready for drug studies.
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Affiliation(s)
- S Kuehn
- Experimental Eye Research, Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892 Bochum, Germany
| | - J Hurst
- University Eye Hospital Tübingen, Centre for Ophthalmology, Elfriede-Aulhorn-Str. 7, 72076, Tübingen, Germany
| | - F Rensinghoff
- Experimental Eye Research, Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892 Bochum, Germany
| | - T Tsai
- Experimental Eye Research, Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892 Bochum, Germany
| | - S Grauthoff
- Experimental Eye Research, Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892 Bochum, Germany
| | - Y Satgunarajah
- Experimental Eye Research, Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892 Bochum, Germany
| | - H B Dick
- Experimental Eye Research, Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892 Bochum, Germany
| | - S Schnichels
- University Eye Hospital Tübingen, Centre for Ophthalmology, Elfriede-Aulhorn-Str. 7, 72076, Tübingen, Germany.
| | - S C Joachim
- Experimental Eye Research, Eye Hospital, Ruhr-University Bochum, In der Schornau 23-25, 44892 Bochum, Germany.
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19
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Sousa LMMDC, Silva RDS, Fonseca VUD, Leandro RM, Di Vincenzo TS, Alves-Wagner AB, Machado UF, Papa PDC. Is the canine corpus luteum an insulin-sensitive tissue? J Endocrinol 2016; 231:223-233. [PMID: 27679426 DOI: 10.1530/joe-16-0173] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 09/27/2016] [Indexed: 01/08/2023]
Abstract
This study aimed to determine in the canine corpus luteum throughout the dioestrus (1) the influence of insulin on glucose uptake; (2) the regulation of genes potentially involved; and (3) the influence of hypoxia on glucose transporter expression and steroidogenesis, after treatment with cobalt chloride (CoCl2). Glucose uptake by luteal cells increased 2.7 folds (P < 0.05) in response to insulin; a phenomenon related to increased expression of glucose transporter (GLUT) 4 and phosphorylation of protein kinase B (AKT). The gene expression of insulin receptor and SLC2A4 (codifier of GLUT4) genes after insulin stimulation increased on day 20 post ovulation (p.o.) and declined on day 40 p.o. (P < 0.05). Regarding potentially involved molecular mechanisms, the nuclear factor kappa B gene RELA was upregulated on days 30/40 p.o., when SLC2A4 mRNA was low, and the interleukin 6 (IL6) gene was upregulated in the first half of dioestrus, when SLC2A4 mRNA was high. CoCl2 in luteal cell cultures increased the hypoxia-inducible factor HIF1A/HIF1A and the SLC2A4/GLUT4 expression, and decreased progesterone (P4) production and hydroxyl-delta-5-steroid dehydrogenase 3 beta (HSD3B) mRNA expression (P < 0.05). This study shows that the canine luteal cells are responsive to insulin, which stimulates glucose uptake in AKT/GLUT4-mediated pathway; that may be related to local activity of RELA and IL6. Besides, the study reveals that luteal cells under hypoxia activate HIF1A-modulating luteal function and insulin-stimulated glucose uptake. These data indicate that insulin regulates luteal cells' glucose disposal, participating in the maintenance and functionality of the corpus luteum.
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Affiliation(s)
| | - Renata Dos Santos Silva
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Vanessa Uemura da Fonseca
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Rafael Magdanelo Leandro
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Thiago Senna Di Vincenzo
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Ana Bárbara Alves-Wagner
- Department of Physiology and BiophysicsInstitute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Ubiratan Fabres Machado
- Department of Physiology and BiophysicsInstitute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Paula de Carvalho Papa
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
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20
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Jóźwiak-Bębenista M, Wiktorowska-Owczarek A, Kowalczyk E. Beta-adrenoceptor-mediated cyclic AMP signal in different types of cultured nerve cells in normoxic and hypoxic conditions. Mol Biol 2016. [DOI: 10.1134/s0026893316050071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Cortezon-Tamarit F, Sarpaki S, Calatayud DG, Mirabello V, Pascu SI. Applications of "Hot" and "Cold" Bis(thiosemicarbazonato) Metal Complexes in Multimodal Imaging. CHEM REC 2016; 16:1380-97. [PMID: 27149900 DOI: 10.1002/tcr.201500292] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Indexed: 02/06/2023]
Abstract
The applications of coordination chemistry to molecular imaging has become a matter of intense research over the past 10 years. In particular, the applications of bis(thiosemicarbazonato) metal complexes in molecular imaging have mainly been focused on compounds with aliphatic backbones due to the in vivo imaging success of hypoxic tumors with PET (positron emission tomography) using (64) CuATSM [copper (diacetyl-bis(N4-methylthiosemicarbazone))]. This compound entered clinical trials in the US and the UK during the first decade of the 21(st) century for imaging hypoxia in head and neck tumors. The replacement of the ligand backbone to aromatic groups, coupled with the exocyclic N's functionalization during the synthesis of bis(thiosemicarbazones) opens the possibility to use the corresponding metal complexes as multimodal imaging agents of use, both in vitro for optical detection, and in vivo when radiolabeled with several different metallic species. The greater kinetic stability of acenaphthenequinone bis(thiosemicarbazonato) metal complexes, with respect to that of the corresponding aliphatic ATSM complexes, allows the stabilization of a number of imaging probes, with special interest in "cold" and "hot" Cu(II) and Ga(III) derivatives for PET applications and (111) In(III) derivatives for SPECT (single-photon emission computed tomography) applications, whilst Zn(II) derivatives display optical imaging properties in cells, with enhanced fluorescence emission and lifetime with respect to the free ligands. Preliminary studies have shown that gallium-based acenaphthenequinone bis(thiosemicarbazonato) complexes are also hypoxia selective in vitro, thus increasing the interest in them as new generation imaging agents for in vitro and in vivo applications.
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Affiliation(s)
| | - Sophia Sarpaki
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - David G Calatayud
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Vincenzo Mirabello
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Sofia I Pascu
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
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Tahmasebi Birgani Z, Fennema E, Gijbels MJ, de Boer J, van Blitterswijk CA, Habibovic P. Stimulatory effect of cobalt ions incorporated into calcium phosphate coatings on neovascularization in an in vivo intramuscular model in goats. Acta Biomater 2016; 36:267-76. [PMID: 27000550 DOI: 10.1016/j.actbio.2016.03.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Revised: 02/02/2016] [Accepted: 03/17/2016] [Indexed: 01/07/2023]
Abstract
UNLABELLED Rapid vascularization of bone graft substitutes upon implantation is one of the most important challenges to overcome in order to achieve successful regeneration of large, critical-size bone defects. One strategy for stimulating vascularization during the regeneration process is to create a hypoxic microenvironment by either directly lowering the local oxygen tension, or by applying hypoxia-mimicking factors. Cells compensate for the hypoxic condition by releasing angiogenic factors leading to new blood vessel formation. In the present study, we explored the potential of cobalt ions (Co(2+)), known chemical mimickers of hypoxia, to stimulate vascularization within a bone graft substitute in vivo. To this end, Co(2+) ions were incorporated into calcium phosphate (CaPs) coatings deposited on poly(lactic acid) (PLA) particles with their effect on the formation of new blood vessels studied upon intramuscular implantation in goats. PLA particles and CaP-coated particles without Co(2+) ions served as controls. Pathological scoring of the inflammatory response following a 12-week implantation period showed no significant differences between the four types of materials. Based on histological and immunohistochemical analyses, both blood vessel area and number of blood vessels in CaP-coated PLA particles containing Co(2+) were higher than in the uncoated PLA particles and CaP-coated PLA particles without Co(2+). Analysis of blood vessel size distribution indicated abundant formation of small blood vessels in all the samples, while large blood vessels were predominantly found in PLA particles coated with CaP containing Co(2+) ions. The results of this study support the use of CaPs containing Co(2+) ions to enhance vascularization in vivo. STATEMENT OF SIGNIFICANCE In this work, we have investigated the potential of cobalt ions, incorporated into thin calcium phosphate (CaP) coatings that were deposited on particles of poly(lactic acid) (PLA), to induce neovascularization in vivo. Qualitative and quantitative histological and immunohistochemical analyses showed that both the number of blood vessels and the total blood vessel area were higher in CaP-coated PLA particles containing cobalt ions as compared to the uncoated PLA particles and CaP-coated PLA particles without the metallic additive. Furthermore, a wider distribution of blood vessel sizes, varying from very small to large vessels was specifically observed in samples containing cobalt ions. This in vivo study will significantly contribute to the existing knowledge on the use of bioinorganics, which are simple and inexpensive inorganic factors that can be used to control relevant biological process during tissue regeneration, such as vascularization. As such, we are convinced that this manuscript will be of interest to the readers of Acta Biomaterialia.
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Turkoglu SA, Kockar F. SP1 and USF differentially regulate ADAMTS1 gene expression under normoxic and hypoxic conditions in hepatoma cells. Gene 2016; 575:48-57. [PMID: 26299656 DOI: 10.1016/j.gene.2015.08.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 06/30/2015] [Accepted: 08/18/2015] [Indexed: 01/28/2023]
Abstract
ADAM metallopeptidase with thrombospondin type I motif, 1 (ADAMTS1) that has both antiangiogenic and aggrecanase activity was dysregulated in many pathophysiologic circumstances. However, there is limited information available on the transcriptional regulation of ADAMTS1 gene. Therefore, this study mainly aimed to identify regulatory regions important for the regulation of ADAMTS1 gene under normoxic and hypoxic conditions in human hepatoma cells (HEP3B). Cultured HEP3B cells were exposed to normal oxygen condition, and Cobalt chloride (CoCl2) induced the hypoxic condition, which is an HIF-1 inducer. The cocl2-induced hypoxic condition led to the induced ADAMTS1 mRNA and protein expression in Hepatoma cells. Differential regulation of SP1 and USF transcription factors on ADAMTS1 gene expression was determined by transcriptional activity, mRNA and protein level of ADAMTS1 gene. Ectopic expression of SP1 and USF transcription factors resulted in the decrease in ADAMTS1 transcriptional activity of all promoter constructs consistent with mRNA and protein level in normoxic condition. However, overexpression of SP1 and USF led to the increase of ADAMTS1 gene expressions at mRNA and protein level in hypoxic condition. On the other hand, C/EBPα transcription factor didn't show any statistically significant effect on ADAMTS1 gene expression at mRNA, protein and transcriptional level under normoxic and hypoxic condition.
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Affiliation(s)
- Sumeyye Aydogan Turkoglu
- Department of Molecular Biology and Genetics, Faculty of Art and Science, Balikesir University, 10145 Balikesir, Turkey
| | - Feray Kockar
- Department of Molecular Biology and Genetics, Faculty of Art and Science, Balikesir University, 10145 Balikesir, Turkey.
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Yalu R, Oyesiji AE, Eisenberg I, Imbar T, Meidan R. HIF1A-dependent increase in endothelin 2 levels in granulosa cells: role of hypoxia, LH/cAMP, and reactive oxygen species. Reproduction 2015; 149:11-20. [PMID: 25433027 DOI: 10.1530/rep-14-0409] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Hypoxia-inducible factor 1 alpha (HIF1A) and endothelin 2 (EDN2) are transiently expressed during the same time window in the developing corpus luteum (CL). In this study, we sought to investigate the involvement of LH/cAMP, reactive oxygen species (ROS), and a hypoxia-mimetic compound (CoCl2) on HIF1A expression and how it affected EDN2 levels, using transformed human granulosa cells (thGCs) and primary bovine granulosa cells (GCs). CoCl2 elevated HIF1A protein levels in thGCs in a dose-dependent manner. Forskolin alone had no significant effect; however, forskolin and CoCl2 together further induced HIF1A protein and EDN2 mRNA expression in thGCs. Similarly, in primary GCs, LH with CoCl2 synergistically augmented HIF1A protein levels, which resulted in higher expression of EDN2 and another well-known hypoxia-inducible gene, VEGF (VEGFA). Importantly, LH alone elevated HIF1A mRNA but not its protein. The successful knockdown of HIF1A in thGCs using siRNA abolished hypoxia-induced EDN2 and also the additive effect of forskolin and CoCl2. We then examined the roles of ROS in thGCs: hydrogen peroxide (20 and 50 μM) elevated HIF1A protein as well as the expression of EDN2, implying that induction of HIF1A protein levels is sufficient to stimulate the expression of EDN2 (and VEGF) in normoxia. A broad-range ROS scavenger, butylated hydroxyanisole, inhibited CoCl2-induced HIF1A protein with a concomitant reduction in the mRNA expression of EDN2 and VEGF in thGCs. The results obtained in this study suggest that HIF1A, induced by various stimuli, is an essential mediator of EDN2 mRNA expression. The results may also explain the rise in the levels of HIF1A-dependent genes (EDN2 and VEGF) in the developing CL.
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Affiliation(s)
- Ronit Yalu
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
| | - Adepeju Esther Oyesiji
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
| | - Iris Eisenberg
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
| | - Tal Imbar
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
| | - Rina Meidan
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
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Hielscher A, Gerecht S. Hypoxia and free radicals: role in tumor progression and the use of engineering-based platforms to address these relationships. Free Radic Biol Med 2015; 79:281-91. [PMID: 25257256 PMCID: PMC4339408 DOI: 10.1016/j.freeradbiomed.2014.09.015] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 08/11/2014] [Accepted: 09/15/2014] [Indexed: 12/23/2022]
Abstract
Hypoxia is a feature of all solid tumors, contributing to tumor progression and therapy resistance. Through stabilization of the hypoxia-inducible factor 1 alpha (HIF-1α), hypoxia activates the transcription of a number of genes that sustain tumor progression. Since the seminal discovery of HIF-1α as a hypoxia-responsive master regulator of numerous genes and transcription factors, several groups have reported a novel mechanism whereby hypoxia mediates stabilization of HIF-1α. This process occurs as a result of hypoxia-generated reactive oxygen species (ROS), which, in turn, stabilize the expression of HIF-1α. As a result, a number of genes regulating tumor growth are expressed, fueling ongoing tumor progression. In this review, we outline a role for hypoxia in generating ROS and additionally define the mechanisms contributing to ROS-induced stabilization of HIF-1α.We further explore how ROS-induced HIF-1α stabilization contributes to tumor growth, angiogenesis, metastasis, and therapy response. We discuss a future outlook, describing novel therapeutic approaches for attenuating ROS production while considering how these strategies should be carefully selected when combining with chemotherapeutic agents. As engineering-based approaches have been more frequently utilized to address biological questions, we discuss opportunities whereby engineering techniques may be employed to better understand the physical and biochemical factors controlling ROS expression. It is anticipated that an improved understanding of the mechanisms responsible for the hypoxia/ROS/HIF-1α axis in tumor progression will yield the development of better targeted therapies.
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Affiliation(s)
- Abigail Hielscher
- Department of Biomedical Sciences, Georgia Philadelphia College of Osteopathic Medicine, Suwanee, GA 30024, USA; Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Johns Hopkins Physical Sciences-Oncology Center, Johns Hopkins University, Baltimore, MD 21218, USA; Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.
| | - Sharon Gerecht
- Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA; Johns Hopkins Physical Sciences-Oncology Center, Johns Hopkins University, Baltimore, MD 21218, USA; Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD 21218, USA.
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Park JS, Lee S, Jeong AL, Han S, Ka HI, Lim JS, Lee MS, Yoon DY, Lee JH, Yang Y. Hypoxia-induced IL-32β increases glycolysis in breast cancer cells. Cancer Lett 2015; 356:800-8. [DOI: 10.1016/j.canlet.2014.10.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 10/28/2014] [Accepted: 10/28/2014] [Indexed: 01/05/2023]
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Jiang J, Auchinvole C, Fisher K, Campbell CJ. Quantitative measurement of redox potential in hypoxic cells using SERS nanosensors. NANOSCALE 2014; 6:12104-12110. [PMID: 25195575 DOI: 10.1039/c4nr01263a] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hypoxia is considered to be a reductive disorder of cells that is caused either by a lack of oxygen or by the dysregulation of metabolic pathways and is thought to play a role in the pathology of diseases including stroke and cancer. One aspect of hypoxia that remains poorly investigated is the dysregulation of cellular redox potential and its role in controlling biological pathway activation. Since there is currently no way of quantitatively measuring the intracellular redox potential of hypoxic cells, this provided us with the motivation to develop optical nanosensors whose Surface-Enhanced Raman (SER) spectrum provides a quantitative measure of redox potential in hypoxic cells. Our nanosensors are made from organic reporter molecules that show oxidation-state-dependent changes in the Raman spectrum and are chemically adsorbed onto gold nanoshells. These nanosensors can be taken up by cells, and by collecting the SER spectrum we can calculate the localised intracellular redox potential from single hypoxic cells in a non-invasive, reversible way.
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Affiliation(s)
- Jing Jiang
- EaStCHEM, School of Chemistry, Joseph Black Building, University of Edinburgh, West Mains Road, Edinburgh EH9 3JJ, UK.
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28
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Jóźwiak-Bębenista M, Kowalczyk E, Nowak JZ. The cyclic AMP effects and neuroprotective activities of PACAP and VIP in cultured astrocytes and neurons exposed to oxygen-glucose deprivation. Pharmacol Rep 2014; 67:332-8. [PMID: 25712659 DOI: 10.1016/j.pharep.2014.10.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 09/24/2014] [Accepted: 10/02/2014] [Indexed: 01/30/2023]
Abstract
BACKGROUND Pituitary adenylate cyclase-activating polypeptide (PACAP) and vasoactive intestinal peptide (VIP) are endogenous peptides, widely expressed in the central and peripheral nervous system. The adenylyl cyclase (AC)/cyclic AMP (cAMP) is their main intracellular signal transduction pathway. Numerous data suggest that PACAP and VIP have considerable neuroprotective potential, indicating the possibility for their use as new therapeutic strategies in stroke treatment. The aim of this study was to evaluate the effect of oxygen-glucose deprivation (OGD) - an established in vitro model for ischemic cell stress - on PACAP and VIP-evoked receptor-mediated cAMP generation in glial and neuronal cells, and to determine whether PACAP and VIP have neuroprotective activity under these conditions. METHODS The formation of [(3)H]cAMP by PACAP, VIP and forskolin (a direct activator of AC) was measured in [(3)H]adenine prelabeled primary rat glial and neuronal cells under normoxia and OGD conditions. The effects of PACAP and VIP on cell viability were measured using the MTT conversion method, and were compared to tacrolimus (FK506), a well known neuroprotective agent. RESULTS The OGD model inhibited the PACAP and VIP-induced cAMP formation in rat astrocytes and neurons. Incubation of neuronal cells with PACAP prevented OGD-induced cell death, more efficiently than VIP and FK506. CONCLUSION The obtained results showed that hypoxia/ischemia may trigger down-regulation of the brain AC-coupled PACAP/VIP receptors, with a consequent decrease of PACAP- and/or VIP-ergic-dependent cAMP-driven signaling. Moreover, our findings indicate that PACAP and VIP can prevent the deleterious effect of OGD on rat neuronal cells.
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Affiliation(s)
- Marta Jóźwiak-Bębenista
- Department of Pharmacology and Toxicology, The Interfaculty Chair of Basic and Clinical Pharmacology, Medical University of Lodz, Łódź, Poland.
| | - Edward Kowalczyk
- Department of Pharmacology and Toxicology, The Interfaculty Chair of Basic and Clinical Pharmacology, Medical University of Lodz, Łódź, Poland
| | - Jerzy Z Nowak
- Department of Pharmacology and Toxicology, The Interfaculty Chair of Basic and Clinical Pharmacology, Medical University of Lodz, Łódź, Poland
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Rani A, Prasad S. CoCl2-induced biochemical hypoxia down regulates activities and expression of super oxide dismutase and catalase in cerebral cortex of mice. Neurochem Res 2014; 39:1787-96. [PMID: 25052430 DOI: 10.1007/s11064-014-1388-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 07/08/2014] [Accepted: 07/14/2014] [Indexed: 12/11/2022]
Abstract
Hypoxia-induced oxidative stress is one of the major hallmark reasons underlying brain dysfunction. In the present manuscript, we have used CoCl2-induced hypoxic mice to investigate alterations in the activities of chief antioxidative stress enzymes- superoxide dismutase (SOD) and catalase (CAT) and expression of their genes Sod1 and Cat in the cerebral cortex as this model has not been routinely used for carrying out such study. Hypoxia mimetic mice model was accordingly developed by oral CoCl2 administration to mice and validated by analyzing alterations in the expression of the hypoxia inducible factor gene Hif-1α and its immediate responsive genes. Our Western blot data demonstrated that a dose of 40 mg/kg BW of CoCl2 was able to generate hypoxia like condition in mice in which Hif-1α and its immediate responsive genes-glutamate transporter-1 (Slc2a1) and erythropoietin (Epo) expression were up regulated. Our in-gel assay data indicated that SOD and CAT activities significantly declined and it was associated with significant down regulation of Sod1 and Epo expression as evident from our semi quantitative RT-PCR and Western blot data, which might be correlated with up regulation of Hif-1α expression in the cerebral cortex of the CoCl2-treated hypoxic mice. Our findings suggest that CoCl2-induced hypoxic mouse model is useful for studying alterations in the anti oxidative enzymes and biochemical/molecular/neurobiological analysis of hypoxia-induced alterations in brain function.
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Affiliation(s)
- Anupama Rani
- Biochemistry and Molecular Biology Lab, Department of Zoology, Centre of Advanced Study in Zoology, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India
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Hypoxia-Inducible Factor-1α and its Role in the Proliferation of Retinoblastoma Cells. Pathol Oncol Res 2013; 20:557-63. [DOI: 10.1007/s12253-013-9728-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 11/18/2013] [Indexed: 10/25/2022]
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Wang L, Liu W, Wang Y, Wang JC, Tu Q, Liu R, Wang J. Construction of oxygen and chemical concentration gradients in a single microfluidic device for studying tumor cell-drug interactions in a dynamic hypoxia microenvironment. LAB ON A CHIP 2013; 13:695-705. [PMID: 23254684 DOI: 10.1039/c2lc40661f] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Recent microfluidic advancements in oxygen gradients have greatly promoted controllable oxygen-sensitive cellular investigations at microscale resolution. However, multi-gradient integration in a single microfluidic device for tissue-mimicking cell investigation is not yet well established. In this study, we describe a method that can generate oxygen and chemical concentration gradients in a single microfluidic device via the formation of an oxygen gradient in a chamber and a chemical concentration gradient between adjacent chambers. The oxygen gradient dynamics were systematically investigated, and were quantitatively controlled using simple exchange between the aerial oxygen and the oxygen-free conditions in the gas-permeable polydimethylsiloxane channel. Meanwhile, the chemical gradient dynamics was generated using a special channel-branched device. For potential medical applications of the established oxygen and chemical concentration gradients, a tumor cell therapy assessment was performed using two antitumor drugs (tirapazamine and bleomycin) and two tumor cell lines (human lung adenocarcinoma A549 cells and human cervical carcinoma HeLa cells). The results of the proof-of-concept experiment indicate the dose-dependent antitumor effect of the drugs and hypoxia-induced cytotoxicity of tirapazamine. We demonstrate that the integration of oxygen and chemical concentration gradients in a single device can be applied to investigating oxygen- and chemical-sensitive cell events, which can also be valuable in the development of multi-gradient generating procedures and specific drug screening.
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Affiliation(s)
- Lei Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi 712100, China
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Histone demethylase JMJD2B-mediated cell proliferation regulated by hypoxia and radiation in gastric cancer cell. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2012; 1819:1200-7. [PMID: 23046878 DOI: 10.1016/j.bbagrm.2012.10.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 09/12/2012] [Accepted: 10/01/2012] [Indexed: 02/06/2023]
Abstract
Histone modifying factors are functional components of chromatin and play a role in gene regulation. The expression level of JMJD2B, a histone demethylase, is notably up-regulated in cancer tissues. Upregulation of JMJD2B promotes cancer cell proliferation under hypoxic conditions through target gene expression. Here, we describe the patterns of histone methylation and JMJD2B expression under various stressed conditions, such as hypoxia and radiation, in a gastric cancer cell line. JMJD2B expression in AGS cells was actively regulated by hypoxia and radiation. Chromatin immunoprecipitation experiments demonstrated that binding of JMJD2B on the cyclin A1 (CCNA1) promoter resulted in CCNA1 upregulation under hypoxic conditions. Furthermore, we confirmed that AGS cell proliferation was directly affected by JMJD2B and CCNA1 expression by performing experiments with JMJD2B depleted cells. Interestingly, the effects of JMJD2B on cell growth under hypoxia were remarkably repressed after gamma-ray irradiation. These results suggest that JMJD2B may play a central role in gastric cancer cell growth and might constitute a novel therapeutic target to overcome hypoxia-induced radio-resistance, thereby improving the efficiency of radiation therapy.
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Yu RMK, Chu DLH, Tan TF, Li VWT, Chan AKY, Giesy JP, Cheng SH, Wu RSS, Kong RYC. Leptin-mediated modulation of steroidogenic gene expression in hypoxic zebrafish embryos: implications for the disruption of sex steroids. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:9112-9. [PMID: 22816610 DOI: 10.1021/es301758c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Hypoxia can impair reproduction of fishes through the disruption of sex steroids. Here, using zebrafish (Danio rerio) embryos, we investigated (i) whether hypoxia can directly affect steroidogenesis independent of pituitary regulation via modulation of steroidogenic gene expression, and (ii) the role of leptin in hypoxia-induced disruption of steroidogenesis. Exposure of fertilized zebrafish embryos to hypoxia (1.0 mg O(2) L(-1)) from 0-72 h postfertilization (hpf), a developmental window when steroidogenesis is unregulated by pituitary influence, resulted in the up-regulation of cyp11a, cyp17, and 3β-hsd and the down-regulation of cyp19a. Similar gene expression patterns were observed for embryos exposed to 10 mM cobalt chloride (CoCl(2), a chemical inducer of hypoxia-inducible factor 1, HIF-1), suggesting a regulatory role of HIF-1 in steroidogenesis. Testosterone (T) and estradiol (E2) concentrations in hypoxic embryos were greater and lesser, respectively, relative to the normoxic control, thus leading to an increased T/E2 ratio. Expression of the leptin-a gene (zlep-a) was up-regulated upon both hypoxia and CoCl(2) treatments. Functional assays suggested that under hypoxia, elevated zlep-a expression might activate cyp11a and 3β-hsd and inhibit cyp19a. Overall, this study indicates that hypoxia, possibly via HIF-1-induced leptin expression, modulates sex steroid synthesis by acting directly on steroidogenic gene expression.
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Affiliation(s)
- Richard Man Kit Yu
- School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales, Australia
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Lim D, Roh JY, Eom HJ, Choi JY, Hyun J, Choi J. Oxidative stress-related PMK-1 P38 MAPK activation as a mechanism for toxicity of silver nanoparticles to reproduction in the nematode Caenorhabditis elegans. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2012; 31:585-92. [PMID: 22128035 DOI: 10.1002/etc.1706] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 07/25/2011] [Accepted: 10/09/2011] [Indexed: 05/02/2023]
Abstract
In the present study, a toxic mechanism of silver nanoparticles (AgNPs) was investigated in the nematode, Caenorhabditis elegans, focusing on the involvement of oxidative stress in reproduction toxicity. Initially, AgNPs were tested as potential oxidative stress inducers, and increased formation of reactive oxygen species (ROS) was observed in AgNP-exposed C. elegans. Subsequently, the potential upstream signaling pathway activated in response to AgNP exposure was investigated, paying special attention to the C. elegans PMK-1 p38 mitogen-activated protein kinase (MAPK). Increased PMK-1 p38 MAPK gene and protein expressions were observed in C. elegans exposed to AgNPs. Expression of the p38-dependent transcription factor genes and glutathione S-transferase (GST) enzyme activity was also investigated in wildtype (N2) and pmk-1 mutant (km25) C. elegans exposed to AgNPs. The results indicated that AgNP exposure led to increased ROS formation, increased expression of PMK-1 p38 MAPK and hypoxia-inducible factor (HIF-1), GST enzyme activity, and decreased reproductive potential in wildtype (N2) C. elegans; whereas in the AgNP-exposed pmk-1 (km25) mutant, ROS formation and HIF-1 and GST activation were not observed, and decreased reproductive potential was rescued. These results suggest that oxidative stress is an important mechanism of AgNP-induced reproduction toxicity in C. elegans, and that PMK-1 p38 MAPK plays an important role in it. The results also suggest that GST and HIF-1 activation by AgNP exposure are PMK-1 p38 MAPK-dependent, and that both play an important role in the PMK-1 p38 MAPK-mediated defense pathway to AgNP exposure in C. elegans.
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Affiliation(s)
- Dongyoung Lim
- School of Environmental Engineering, Graduate School of Energy and Environment Systems Engineering, University of Seoul, Seoul, Korea
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Kumar A, Rani L, Dhole B, Chaturvedi PK. Oxygen as a regulator of MA-10 cell functions: effect of cobalt chloride on vascular endothelial growth factor production. Andrologia 2011; 44 Suppl 1:615-20. [DOI: 10.1111/j.1439-0272.2011.01239.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Kim HJ, Oh JS, An SS, Pennant WA, Gwak SJ, Kim AN, Han PK, Yoon DH, Kim KN, Ha Y. Hypoxia-specific GM-CSF-overexpressing neural stem cells improve graft survival and functional recovery in spinal cord injury. Gene Ther 2011; 19:513-21. [DOI: 10.1038/gt.2011.137] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Sodium sulfite is a potential hypoxia inducer that mimics hypoxic stress in Caenorhabditis elegans. J Biol Inorg Chem 2010; 16:267-74. [PMID: 21057967 DOI: 10.1007/s00775-010-0723-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Accepted: 10/13/2010] [Indexed: 10/18/2022]
Abstract
Physical and chemical hypoxia have been widely used in the study of hypoxic injury; however, both of these hypoxia models have their own limitations. Physical hypoxia is usually difficult to control and maintain. Chemical hypoxia, which is usually induced by chemical hypoxia-mimicking agents, such as CoCl(2), may result in heavy metal toxicity or impose security threats. To develop a more suitable hypoxia model, we focused on sodium sulfite (Na(2)SO(3)) and evaluated its ability to remove dissolved oxygen in aqueous solutions. Our results showed that sodium sulfite successfully induced hypoxic conditions. The degree of hypoxia and the guarantee period of the sodium sulfite solution could be easily controlled by the concentration of soluble sodium sulfite. In addition, we used sodium sulfite to create a hypoxia model in Caenorhabditis elegans. Similar to physical hypoxia, the sodium sulfite solutions induced hypoxia-related death in the worms and led to morphologic cell defects and C. elegans hypoxia inducible factor 1 stabilization. Taken together, our data show that sodium sulfite is a potential hypoxia inducer that mimics hypoxic stress in C. elegans.
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Grahl N, Cramer RA. Regulation of hypoxia adaptation: an overlooked virulence attribute of pathogenic fungi? Med Mycol 2010; 48:1-15. [PMID: 19462332 DOI: 10.3109/13693780902947342] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Over the past two decades, the incidence of fungal infections has dramatically increased. This is primarily due to increases in the population of immunocompromised individuals attributed to the HIV/AIDS pandemic and immunosuppression therapies associated with organ transplantation, cancer, and other diseases where new immunomodulatory therapies are utilized. Significant advances have been made in understanding how fungi cause disease, but clearly much remains to be learned about the pathophysiology of these often lethal infections. Fungal pathogens face numerous environmental challenges as they colonize and infect mammalian hosts. Regardless of a pathogen's complexity, its ability to adapt to environmental changes is critical for its survival and ability to cause disease. For example, at sites of fungal infections, the significant influx of immune effector cells and the necrosis of tissue by the invading pathogen generate hypoxic microenvironments to which both the pathogen and host cells must adapt in order to survive. However, our current knowledge of how pathogenic fungi adapt to and survive in hypoxic conditions during fungal pathogenesis is limited. Recent studies have begun to observe that the ability to adapt to various levels of hypoxia is an important component of the virulence arsenal of pathogenic fungi. In this review, we focus on known oxygen sensing mechanisms that non-pathogenic and pathogenic fungi utilize to adapt to hypoxic microenvironments and their possible relation to fungal virulence.
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Affiliation(s)
- Nora Grahl
- Department of Veterinary Molecular Biology, Montana State University, Bozeman, Montana, USA
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Chen JK, Zhan YJ, Yang CS, Tzeng SF. Oxidative stress-induced attenuation of thrombospondin-1 expression in primary rat astrocytes. J Cell Biochem 2010; 112:59-70. [DOI: 10.1002/jcb.22732] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Cobalt chloride, a chemical inducer of hypoxia-inducible factor-1α in U251 human glioblastoma cell line. JOURNAL OF SAUDI CHEMICAL SOCIETY 2010. [DOI: 10.1016/j.jscs.2010.02.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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41
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Kolesarova A, Capcarova M, Sirotkin A, Medvedova M, Kovacik J. Cobalt-induced changes in the IGF-I and progesterone release, expression of proliferation- and apoptosis-related peptides in porcine ovarian granulosa cells in vitro. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2010; 45:810-817. [PMID: 20397087 DOI: 10.1080/10934521003708968] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Cobalt (Co) is an essential element. The general objective of this in vitro study was to examine dose-dependent changes in the secretory activity of porcine ovarian granulosa cells after experimental Co administration and to outline the potential intracellular mediators of its effects. Concentrations of IGF-I and progesterone were determined by RIA and expression of cyclin B1 and caspase-3 by immunocytochemistry. IGF-I release by granulosa cells was stopped by Co addition at the concentration 1 mg/mL. Progesterone release by granulosa cells was decreased at the lowest Co addition (0.09 mg/mL). In our study the changes of the expression of proliferation related peptide cyclin B1 and apoptosis related peptide caspase-3 in ovarian granulosa cells was observed after experimental Co addition. The molecular pathways stimulated by Co through the expression of cyclin B1 and caspase-3 were found. In conclusion, this study provides novel evidence that cobalt is the factor which can initiate adverse effects in ovarian granulosa cells. These results contribute towards the understanding of mechanisms relating to endocrine disruptor-induced alterations in porcine ovarian granulosa cells.
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Affiliation(s)
- Adriana Kolesarova
- Department of Animal Physiology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture, Nitra, Slovak Republic.
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Lu H, Li Y, Shu M, Tang J, Huang Y, Zhou Y, Liang Y, Yan G. Hypoxia-inducible factor-1α blocks differentiation of malignant gliomas. FEBS J 2009; 276:7291-304. [DOI: 10.1111/j.1742-4658.2009.07441.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Kolesarova A, Capcarova M, Sirotkin A, Massanyi P. Insulin-Like Growth Factor-I and Progesterone Release by Ovarian Granulosa Cells of Hens after Experimental Lead and Molybdenum Administrations in vitro. ACTA ACUST UNITED AC 2009. [DOI: 10.3923/ijps.2009.890.895] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kilic S, Tasdemir N, Lortlar N, Yuksel B, Budak G, Batioglu S. Vascular endothelial growth factor (VEGF) and inducible nitric oxide synthase (iNOS) immunoreactivities in rat ovaries and uterine tubes after tubal ligation: a controlled immunohistochemical study. EUR J CONTRACEP REPR 2009; 13:431-7. [PMID: 19117260 DOI: 10.1080/13625180802267052] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To evaluate the effects of tubal ligation on ovarian and tubal tissues by means of immunohistochemical evaluation of two hypoxia related mediators: vascular endothelial growth factor (VEGF) and inducible nitric oxide synthase (iNOS). DESIGN Fourteen Sprague-Dawley female rats were divided into two groups: a tubal ligation (Pomeroy technique) was carried out on rats in group 1 (n = 7) whereas those in group 2 served as controls (n = 7). Salpingo-oophorectomy was performed in group 1 during the second oestrous period following tubal ligation. Rats in group 2 were submitted to a salpingo-oophorectomy, as well. VEGF and iNOS immunoreactivities in ovarian and tubal tissues were evaluated by means of immunohistochemistry. Immunohistochemical scores and number of antral follicles were compared. RESULTS In the ovary, VEGF immunoreactivity was significantly more intense in the granulosa (p = 0.002) and the theca cells (p = 0.001) of rats in group 1 but, in ovarian medulla (p = 0.259) and germinal epithelium (p = 0.209), it was not significantly different from that of rats in group 2. The iNOS immunoreactivity in ovarian granulosa cells (p = 0.073) and germinal epithelial cells (p = 0.805) did not differ between the two groups. The cytoplasmic VEGF (p = 0.001) and iNOS (p = 0.017) immunoreactivities in the uterine tube, were significantly more intense in group 1. However, VEGF immunoreactivity in the lamina propria of the uterine tube (p = 0.209) was of similar intensity in both groups. CONCLUSION Tubal ligation may lead to supraphysiological hypoxia as evidenced by increased VEGF and iNOS immunoreactivities in ovarian and tubal tissues.
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Affiliation(s)
- Sevtap Kilic
- Department of Reproductive Endocrinology, Dr Zekai Tahir Burak Women Health Research Hospital, Ankara.
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Ingavale SS, Chang YC, Lee H, McClelland CM, Leong ML, Kwon-Chung KJ. Importance of mitochondria in survival of Cryptococcus neoformans under low oxygen conditions and tolerance to cobalt chloride. PLoS Pathog 2008; 4:e1000155. [PMID: 18802457 PMCID: PMC2528940 DOI: 10.1371/journal.ppat.1000155] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Accepted: 08/14/2008] [Indexed: 01/09/2023] Open
Abstract
Cryptococcus neoformans is an environmental fungal pathogen that requires atmospheric levels of oxygen for optimal growth. For the fungus to be able to establish an infection, it must adapt to the low oxygen concentrations in the host environment compared to its natural habitat. In order to investigate the oxygen sensing mechanism in C. neoformans, we screened T-DNA insertional mutants for hypoxia-mimetic cobalt chloride (CoCl2)-sensitive mutants. All the CoCl2-sensitive mutants had a growth defect under low oxygen conditions at 37°C. The majority of mutants are compromised in their mitochondrial function, which is reflected by their reduced rate of respiration. Some of the mutants are also defective in mitochondrial membrane permeability, suggesting the importance of an intact respiratory system for survival under both high concentrations of CoCl2 as well as low oxygen conditions. In addition, the mutants tend to accumulate intracellular reactive oxygen species (ROS), and all mutants show sensitivity to various ROS generating chemicals. Gene expression analysis revealed the involvement of several pathways in response to cobalt chloride. Our findings indicate cobalt chloride sensitivity and/or sensitivity to low oxygen conditions are linked to mitochondrial function, sterol and iron homeostasis, ubiquitination, and the ability of cells to respond to ROS. These findings imply that multiple pathways are involved in oxygen sensing in C. neoformans. Cryptococcus neoformans is an obligate aerobic fungus that requires atmospheric levels of oxygen (21%) for optimal growth. However, the fungus is able to cause life-threatening brain infections in humans, where the oxygen tension is significantly lower than 21%. To understand the pathobiology of Cryptococcus neoformans, it is important to explore the molecular mechanisms adopted by the fungus to survive under low oxygen conditions. By using cobalt chloride, a hypoxia-mimicking agent, we isolated a number of mutants that are unable to grow in the presence of 0.7 mM CoCl2 as well as at low oxygen conditions. In this study, we show that mitochondria play an important role for C. neoformans to survive in low oxygen conditions. We demonstrate that mutants harboring mutations in the genes related to mitochondrial functions have mitochondrial membrane permeability defect and lowered respiration rate and are more sensitive to stress generating chemicals, in addition to their inability to survive at low oxygen conditions. Finally, we also show that when wild-type cells are exposed to hypoxia-mimicking cobalt chloride, expression of genes involved in respiration and iron and sterol homeostasis, as well as ubiquitination, changes significantly.
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Affiliation(s)
- Susham S. Ingavale
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Yun C. Chang
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Hyeseung Lee
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Carol M. McClelland
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Madeline L. Leong
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Kyung J. Kwon-Chung
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
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Basini G, Simona B, Santini SE, Grasselli F. Reactive oxygen species and anti-oxidant defences in swine follicular fluids. Reprod Fertil Dev 2008; 20:269-74. [DOI: 10.1071/rd07147] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2007] [Accepted: 11/19/2007] [Indexed: 11/23/2022] Open
Abstract
A growing body of evidence indicates that the pro-oxidant/anti-oxidant balance inside the ovarian follicle plays an important role in folliculogenesis. Therefore, the aim of the present study was to assess the redox status of follicular fluids collected from different-sized swine follicles. We quantified the most important reactive oxygen species (ROS), namely superoxide anion (O2–), hydrogen peroxide and hydroperoxides (ROOH); in addition, we examined the activity of the detoxifying enzymes superoxide dismutase, catalase (CAT) and glutathione peroxidase and the total non-enzymatic antioxidant capacity as determined by the ferric-reducing anti-oxidant power assay. Our data demonstrate that oxidative stress does not affect follicle growth because O2– levels do not change during follicle development, whereas concentrations of H2O2 and ROOH are reduced (P < 0.05). Surprisingly, all non-enzymatic and enzymatic scavengers examined in the present study, except for CAT, demonstrated reduced activity during follicle development (P < 0.05). Taken together, these results suggest that other factors could be involved in ROS detoxification during follicle development.
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Nowak JZ, Jozwiak-Bebenista M, Bednarek K. Effects of PACAP and VIP on cyclic AMP formation in rat neuronal and astrocyte cultures under normoxic and hypoxic condition. Peptides 2007; 28:1706-12. [PMID: 17521773 DOI: 10.1016/j.peptides.2007.04.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2007] [Revised: 04/10/2007] [Accepted: 04/12/2007] [Indexed: 11/30/2022]
Abstract
Pituitary adenylate cyclase-activating polypeptide (PACAP) and vasoactive intestinal peptide (VIP) concentration (0.001-1000 nM)-dependently stimulated cyclic AMP production in rat primary neuronal and glial cell (astrocyte) cultures. The actions of both peptides were much more pronounced in astrocytes than in neuronal cultures. Stimulatory effects of PACAP and VIP on cyclic AMP formation were significantly smaller in cell cultures subjected to 24h lasting hypoxic conditions, induced either chemically (100 microM cobalt chloride) or by low 3% oxygen hypoxia, compared to the normoxic condition (95% air and 5% CO(2)). This picture contrasted with the effects of forskolin that were similar under normoxic and hypoxic conditions. It is suggested that hypoxia leads to changes in PACAP- and VIP-driven cyclic AMP-dependent signaling in the rat brain by influencing molecular processes likely occurring at the level of receptor protein or receptor-Gs protein coupling.
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Affiliation(s)
- Jerzy Z Nowak
- Department of Pharmacology, Medical University, 7/9 Zeligowskiego Street, PL 90-752 Lodz, Poland.
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Lee H, Bien CM, Hughes AL, Espenshade PJ, Kwon-Chung KJ, Chang YC. Cobalt chloride, a hypoxia-mimicking agent, targets sterol synthesis in the pathogenic fungus Cryptococcus neoformans. Mol Microbiol 2007; 65:1018-33. [PMID: 17645443 DOI: 10.1111/j.1365-2958.2007.05844.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We investigated the effects of the hypoxia-mimetic CoCl2 in the pathogenic fungus Cryptococcus neoformans and demonstrated that CoCl2 leads to defects in several enzymatic steps in ergosterol biosynthesis. Sterol defects were amplified in cells lacking components of the Sre1p-mediated oxygen-sensing pathway. Consequently, Sre1p and its binding partner Scp1p were essential for growth in the presence of CoCl2. Interestingly, high copies of a single gene involved in ergosterol biosynthesis, ERG25, rescued this growth defect. We show that the inhibitory effect of CoCl2 on scp1Delta and sre1Delta cells likely resulted from either an accumulation of non-viable methylated sterols or a decrease in the amount of ergosterol. Similar findings were also observed in the ascomycetous yeast, Schizosaccharomyces pombe, suggesting that the effects of CoCl2 on the Sre1p-mediated response are conserved in fungi. In addition, gene expression analysis revealed limited overlap between Sre1p-dependant gene activation in the presence of CoCl2 and low oxygen. The majority of genes similarly affected by both CoCl2 and low oxygen were involved in ergosterol synthesis and in iron/copper transport. This article identifies the Sre1p pathway as a common mechanism by which yeast cells sense and adapt to changes in both CoCl2 concentrations and oxygen levels.
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Affiliation(s)
- Hyeseung Lee
- Laboratory of Clinical Infectious Diseases, NIAID, NIH, Bethesda, MD 20892, USA
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Mitra S, Cassar SE, Niles DJ, Puskas JA, Frelinger JG, Foster TH. Photodynamic therapy mediates the oxygen-independent activation of hypoxia-inducible factor 1alpha. Mol Cancer Ther 2007; 5:3268-74. [PMID: 17172430 DOI: 10.1158/1535-7163.mct-06-0421] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Photodynamic therapy (PDT) induces the expression of the hypoxia-inducible factor 1alpha (HIF-1alpha) subunit of the HIF-1 transcription factor and its target genes in vitro and in vivo. PDT also induces the expression of the enzyme cyclooxygenase-2 and its metabolite, prostaglandin E2 (PGE2). PGE2 and hypoxia act independently and synergistically to increase HIF-1alpha accumulation and nuclear translocation. To examine the expression of HIF-1 target genes in response to PDT-mediated oxidative stress and PGE2 under normoxic conditions, we established EMT6 cells transfected with a plasmid consisting of a hypoxia response element promoter and a downstream gene encoding for green fluorescent protein (GFP). To examine the temporal kinetics of HIF-1alpha nuclear translocation in response to PDT, we transfected a second line of EMT6 cells with a GFP-tagged HIF-1alpha fusion vector. Cell monolayers were incubated with 1 microg mL(-1) Photofrin for 24 h and irradiated with fluences of 1, 2.5, and 5 J cm(-2). Direct measurement of oxygen concentration during irradiation confirmed that cells remained well oxygenated. Cells were also exposed to 1 and 10 micromol/L PGE2 for 3 h. In normoxic conditions, Photofrin, PDT, and PGE2 treatment activated HIF-1alpha and induced its nuclear translocation. Maximal Photofrin-PDT-mediated HIF-1alpha activation was intermediate in magnitude between that induced by PGE2 and that by the hypoxia mimic cobalt chloride. This work establishes that PDT induces significant activation of the HIF-1alpha pathway in the absence of hypoxia and supports the interpretation that the induction of HIF-1 target genes by PDT may be mediated, at least in part, by the prostaglandin pathway.
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Affiliation(s)
- Soumya Mitra
- Department of Imaging Sciences, University of Rochester, 601 Elmwood Avenue, Box 648, Rochester, NY 14642, USA
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Karovic O, Tonazzini I, Rebola N, Edström E, Lövdahl C, Fredholm BB, Daré E. Toxic effects of cobalt in primary cultures of mouse astrocytes. Biochem Pharmacol 2007; 73:694-708. [PMID: 17169330 DOI: 10.1016/j.bcp.2006.11.008] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2006] [Revised: 11/03/2006] [Accepted: 11/10/2006] [Indexed: 01/27/2023]
Abstract
Cobalt is suspected to cause memory deficit in humans and was reported to induce neurotoxicity in animal models. We have studied the effects of cobalt in primary cultures of mouse astrocytes. CoCl(2) (0.2-0.8mM) caused dose-dependent ATP depletion, apoptosis (cell shrinkage, phosphatidylserine externalization and chromatin rearrangements) and secondary necrosis. The mitochondria appeared to be a main target of cobalt toxicity, as shown by the loss of mitochondrial membrane potential (DeltaPsi(m)) and release from the mitochondria of apoptogenic factors, e.g. apoptosis inducing factor (AIF). Pre-treatment with bongkrekic acid reduced ATP depletion, implicating the involvement of the mitochondrial permeability transition (MPT) pore. Cobalt increased the generation of oxygen radicals, but antioxidants did not prevent toxicity. There was also an impaired response to ATP stimulation, evaluated as a lower raise in intracellular calcium. Similarly to hypoxia and dymethyloxallyl glycine (DMOG), cobalt triggered stabilization of the alpha-subunit of hypoxia-inducible factor HIF-1 (HIF-1alpha). This early event was followed by an increased expression of HIF-1 regulated genes, e.g. stress protein HO-1, pro-apoptotic factor Nip3 and iNOS. Although all of the three stimuli activated the HIF-1alpha pathway and decreased ATP levels, the downstream effects were different. DMOG only inhibited cell proliferation, whereas the other two conditions caused cell death by apoptosis and necrosis. This points to cobalt and hypoxia not only inducing HIF-1alpha regulated genes but also affecting similarly other cellular functions, including metabolism.
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Affiliation(s)
- Olga Karovic
- Department of Physiology and Pharmacology, Karolinska Institutet, S-171 77 Stockholm, Sweden
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