1
|
Krunić M, Ristić B, Bošnjak M, Paunović V, Tovilović-Kovačević G, Zogović N, Mirčić A, Marković Z, Todorović-Marković B, Jovanović S, Kleut D, Mojović M, Nakarada Đ, Marković O, Vuković I, Harhaji-Trajković L, Trajković V. Graphene quantum dot antioxidant and proautophagic actions protect SH-SY5Y neuroblastoma cells from oxidative stress-mediated apoptotic death. Free Radic Biol Med 2021; 177:167-180. [PMID: 34678419 DOI: 10.1016/j.freeradbiomed.2021.10.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/13/2021] [Accepted: 10/18/2021] [Indexed: 01/18/2023]
Abstract
We investigated the ability of graphene quantum dot (GQD) nanoparticles to protect SH-SY5Y human neuroblastoma cells from oxidative/nitrosative stress induced by iron-nitrosyl complex sodium nitroprusside (SNP). GQD reduced SNP cytotoxicity by preventing mitochondrial depolarization, caspase-2 activation, and subsequent apoptotic death. Although GQD diminished the levels of nitric oxide (NO) in SNP-exposed cells, NO scavengers displayed only a slight protective effect, suggesting that NO quenching was not the main protective mechanism of GQD. GQD also reduced SNP-triggered increase in the intracellular levels of hydroxyl radical (•OH), superoxide anion (O2•-), and lipid peroxidation. Nonselective antioxidants, •OH scavenging, and iron chelators, but not superoxide dismutase, mimicked GQD cytoprotective activity, indicating that GQD protect cells by neutralizing •OH generated in the presence of SNP-released iron. Cellular internalization of GQD was required for optimal protection, since a removal of extracellular GQD by extensive washing only partly diminished their protective effect. Moreover, GQD cooperated with SNP to induce autophagy, as confirmed by the inhibition of autophagy-limiting Akt/PRAS40/mTOR signaling and increase in autophagy gene transcription, protein levels of proautophagic beclin-1 and LC3-II, formation of autophagic vesicles, and degradation of autophagic target p62. The antioxidant activity of GQD was not involved in autophagy induction, as antioxidants N-acetylcysteine and dimethyl sulfoxide failed to stimulate autophagy in SNP-exposed cells. Pharmacological inhibitors of early (wortmannin, 3-methyladenine) or late stages of autophagy (NH4Cl) efficiently reduced the protective effect of GQD. Therefore, the ability of GQD to prevent the in vitro neurotoxicity of SNP depends on both •OH/NO scavenging and induction of cytoprotective autophagy.
Collapse
Affiliation(s)
- Matija Krunić
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Dr. Subotića 1, 11000, Belgrade, Serbia
| | - Biljana Ristić
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Dr. Subotića 1, 11000, Belgrade, Serbia
| | - Mihajlo Bošnjak
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Dr. Subotića 1, 11000, Belgrade, Serbia
| | - Verica Paunović
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Dr. Subotića 1, 11000, Belgrade, Serbia
| | - Gordana Tovilović-Kovačević
- Department of Biochemistry, Institute for Biological Research, "Siniša Stanković"- National Institute of the Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11000, Belgrade, Serbia
| | - Nevena Zogović
- Department of Neurophysiology, Institute for Biological Research "Siniša Stanković" - National Institute of the Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11000, Belgrade, Serbia
| | - Aleksandar Mirčić
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Višegradska 26, 11000, Belgrade, Serbia
| | - Zoran Marković
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade P.O. Box 522, 11000, Belgrade, Serbia
| | - Biljana Todorović-Marković
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade P.O. Box 522, 11000, Belgrade, Serbia
| | - Svetlana Jovanović
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade P.O. Box 522, 11000, Belgrade, Serbia
| | - Duška Kleut
- Vinča Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade P.O. Box 522, 11000, Belgrade, Serbia
| | - Miloš Mojović
- Faculty of Physical Chemistry, University of Belgrade, Studentski Trg 12-16, 11000, Belgrade, Serbia
| | - Đura Nakarada
- Faculty of Physical Chemistry, University of Belgrade, Studentski Trg 12-16, 11000, Belgrade, Serbia
| | - Olivera Marković
- Department of Chemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000, Belgrade, Serbia
| | - Irena Vuković
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Dr. Subotića 1, 11000, Belgrade, Serbia
| | - Ljubica Harhaji-Trajković
- Department of Neurophysiology, Institute for Biological Research "Siniša Stanković" - National Institute of the Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11000, Belgrade, Serbia.
| | - Vladimir Trajković
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Dr. Subotića 1, 11000, Belgrade, Serbia.
| |
Collapse
|
2
|
Nakarada Đ, Pejin B, Tommonaro G, Mojović M. Liposomal integration method for assessing antioxidative activity of water insoluble compounds towards biologically relevant free radicals: example of avarol. J Liposome Res 2019; 30:218-226. [PMID: 31146614 DOI: 10.1080/08982104.2019.1625378] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The liposomal integration method, in conjunction with electron paramagnetic resonance (EPR) spectroscopy, has been presented for the investigation of antioxidant activity of selected water-insoluble compound towards biologically relevant free radicals. This method was applied to avarol, a sesquiterpenoid hydroquinone isolated from the marine sponge Dysidea avara. The antioxidant activity of water-insoluble avarol towards •OH, O2•- and NO• radicals was attained by its incorporation into the DPPC liposomes bilayer, and towards ascorbyl radicals in the organic solvent. Avarol's activity towards •OH, O2•-, NO• and ascorbyl radicals was 86.2%, 50.9%, 23.6% and 61.8%, respectively, showing its significant radical scavenging potential.
Collapse
Affiliation(s)
- Đura Nakarada
- Faculty of Physical Chemistry, University of Belgrade, Belgrade, Serbia
| | - Boris Pejin
- Department of Life Sciences, Institute for Multidisciplinary Research - IMSI, University of Belgrade, Belgrade, Serbia
| | | | - Miloš Mojović
- Faculty of Physical Chemistry, University of Belgrade, Belgrade, Serbia
| |
Collapse
|
3
|
Hirsh DJ, Schieler BM, Fomchenko KM, Jordan ET, Bidle KD. A liposome-encapsulated spin trap for the detection of nitric oxide. Free Radic Biol Med 2016; 96:199-210. [PMID: 27112665 DOI: 10.1016/j.freeradbiomed.2016.04.026] [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: 02/15/2016] [Revised: 04/09/2016] [Accepted: 04/21/2016] [Indexed: 01/08/2023]
Abstract
Electron paramagnetic resonance (EPR) is one of the few methods that allows for the unambiguous detection of nitric oxide (NO). However, the dithiocarbamate-iron spin traps employed with this method inhibit the activity of nitric oxide synthase and catalyze NO production from nitrite. These disadvantages limit EPR's application to biological NO detection. We present a liposome-encapsulated spin-trap (LEST) method for the capture and in situ detection of NO by EPR. The method shows a linear response for [NO]≥4µM and can detect [NO]≥40nM in a 500µL sample (≥20 pmol). The kinetics of NO production can be followed in real time over minutes to hours. LEST does not inhibit the activity of inducible nitric oxide synthase or nitrate reductase and shows minimal abiotic NO production in the presence of nitrite and NADH. Nitrate reductase-like activity is detected in cell lysates of the coccolithophore Emiliania huxleyi and is elevated in virus-infected culture. This method shows particular promise for NO detection in cell lysates and crude preparations of NO-producing tissues.
Collapse
Affiliation(s)
- Donald J Hirsh
- Department of Chemistry, The College of New Jersey, Ewing, NJ 08628, United States
| | - Brittany M Schieler
- Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, United States
| | | | - Ethan T Jordan
- Department of Biology, Marine Biology & Environmental Science, William Rogers University, Bristol, RI 02809, United States
| | - Kay D Bidle
- Department of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, United States
| |
Collapse
|
4
|
Lieb DC, Kemp BA, Howell NL, Gildea JJ, Carey RM. Reinforcing feedback loop of renal cyclic guanosine 3' 5' -monophosphate and interstitial hydrostatic pressure in pressure-natriuresis. Hypertension 2009; 54:1278-83. [PMID: 19841292 DOI: 10.1161/hypertensionaha.109.131995] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study addresses the hypothesis that renal interstitial (RI) cGMP, a modulator of pressure-natriuresis, exerts its effect through a relationship with renal interstitial hydrostatic pressure (RIHP). Increasing renal perfusion pressure in Sprague-Dawley rats led to increases in RIHP (5.2+/-0.6 to 10.9+/-1.6 mm Hg; P<0.01), urine sodium excretion (0.062+/-0.009 to 0.420+/-0.068 micromol/min per gram; P<0.01), and RI cGMP (3.5+/-0.8 to 9.5+/-1.7 fmol/min; P<0.01), and these effects were blocked by partial renal decapsulation. Infusion of cGMP into the RI compartment of decapsulated animals restored natriuresis (0.067+/-0.010 to 0.310+/-0.061 micromol/min per gram; P<0.01). These changes were independent of changes in glomerular filtration rate . Artificially increasing RIHP in normotensive animals increased RI cGMP (4.1+/-0.6 to 6.9+/-0.7 fmol/min; P<0.01) and urine sodium excretion (0.071+/-0.013 to 0.179+/-0.039 micromol/min per gram; P<0.05). Coinfusion of organic anion transport-inhibitor probenecid, or soluble guanylyl cyclase inhibitor 1-H(1,2,4) oxadiazolo-(4,2)quinoxalin-1-one, abolished these effects. Infusion of cGMP into the RI compartment of normotensive animals increased RIHP (6.7+/-0.4 to 10.3+/-0.9 mm Hg; P<0.001). Exogenous RI cGMP delivery did not affect total, cortical, or medullary renal blood flow. These studies suggest that extracellular RI cGMP is required for the natriuresis observed after increases in renal perfusion pressure and RIHP and that cGMP acts via a tubule mechanism. The results support an intrarenal positive-feedback loop wherein RI cGMP increases RIHP, which, in turn, increases RI cGMP, contributing to the reinforcement of pressure-natriuresis.
Collapse
Affiliation(s)
- David C Lieb
- Division of Endocrinology and Metabolism, Department of Medicine, University of Virginia Health System, Charlottesville, VA, USA.
| | | | | | | | | |
Collapse
|