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Todorović A, Bobić K, Veljković F, Pejić S, Glumac S, Stanković S, Milovanović T, Vukoje I, Nedeljković JM, Radojević Škodrić S, Pajović SB, Drakulić D. Comparable Toxicity of Surface-Modified TiO 2 Nanoparticles: An In Vivo Experimental Study on Reproductive Toxicity in Rats. Antioxidants (Basel) 2024; 13:231. [PMID: 38397829 PMCID: PMC10886084 DOI: 10.3390/antiox13020231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024] Open
Abstract
Nanoparticles (NPs), a distinct class of particles ranging in size from 1 to 100 nm, are one of the most promising technologies of the 21st century, and titanium dioxide NPs (TiO2 NPs) are among the most widely produced and used NPs globally. The increased application of TiO2 NPs raises concerns regarding their global safety and risks of exposure. Many animal studies have reported the accumulation of TiO2 NPs in female reproductive organs; however, evidence of the resultant toxicity remains ambiguous. Since the surface area and chemical modifications of NPs can significantly change their cytotoxicity, we aimed to compare the toxic effects of pristine TiO2 powder with surface-modified TiO2 powders with salicylic acid (TiO2/SA) and 5-aminosalicylic acid (TiO2/5-ASA) on the ovaries, oviducts, and uterus on the 14th day following acute oral treatment. The results, based on alterations in food and water intake, body mass, organ-to-body mass ratio, hormonal status, histological features of tissues of interest, and antioxidant parameters, suggest that the modification with 5-ASA can mitigate some of the observed toxic effects of TiO2 powder and encourage future investigations to create NPs that can potentially reduce the harmful effects of TiO2 NPs while preserving their positive impacts.
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Affiliation(s)
- Ana Todorović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (A.T.); (K.B.); (S.P.); (S.B.P.); (D.D.)
| | - Katarina Bobić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (A.T.); (K.B.); (S.P.); (S.B.P.); (D.D.)
| | - Filip Veljković
- Department of Physical Chemistry, VINČA Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia;
| | - Snežana Pejić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (A.T.); (K.B.); (S.P.); (S.B.P.); (D.D.)
| | - Sofija Glumac
- Institute of Pathology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Sanja Stanković
- Centre for Medical Biochemistry, University Clinical Centre of Serbia, 11000 Belgrade, Serbia;
- Faculty of Medical Sciences, University of Kragujevac, 550601 Kragujevac, Serbia
| | | | - Ivana Vukoje
- Department of Radiation Chemistry and Physics, VINČA Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (I.V.); (J.M.N.)
| | - Jovan M. Nedeljković
- Department of Radiation Chemistry and Physics, VINČA Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (I.V.); (J.M.N.)
| | | | - Snežana B. Pajović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (A.T.); (K.B.); (S.P.); (S.B.P.); (D.D.)
| | - Dunja Drakulić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (A.T.); (K.B.); (S.P.); (S.B.P.); (D.D.)
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Grigorov I, Pejić S, Todorović A, Drakulić D, Veljković F, Vukajlović JM, Bobić K, Soldatović I, Đurašević S, Jasnić N, Stanković S, Glumac S, Mihailović-Vučinić V, Milenković B. Serum High-Mobility Group Box 1 and Heme Oxygenase-1 as Biomarkers in COVID-19 Patients at Hospital Admission. Int J Mol Sci 2023; 24:13164. [PMID: 37685970 PMCID: PMC10488018 DOI: 10.3390/ijms241713164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/06/2023] [Accepted: 08/18/2023] [Indexed: 09/10/2023] Open
Abstract
The careful monitoring of patients with mild/moderate COVID-19 is of particular importance because of the rapid progression of complications associated with COVID-19. For prognostic reasons and for the economic management of health care resources, additional biomarkers need to be identified, and their monitoring can conceivably be performed in the early stages of the disease. In this retrospective cross-sectional study, we found that serum concentrations of high-mobility group box 1 (HMGB1) and heme oxygenase-1 (HO-1), at the time of hospital admission, could be useful biomarkers for COVID-19 management. The study included 160 randomly selected recovered patients with mild to moderate COVID-19 on admission. Compared with healthy controls, serum HMGB1 and HO-1 levels increased by 487.6 pg/mL versus 43.1 pg/mL and 1497.7 pg/mL versus 756.1 pg/mL, respectively. Serum HO-1 correlated significantly with serum HMGB1, oxidative stress parameters (malondialdehyde (MDA), the phosphatidylcholine/lysophosphatidylcholine ratio (PC/LPC), the ratio of reduced and oxidative glutathione (GSH/GSSG)), and anti-inflammatory acute phase proteins (ferritin, haptoglobin). Increased heme catabolism/hemolysis were not detected. We hypothesize that the increase in HO-1 in the early phase of COVID-19 disease is likely to have a survival benefit by providing protection against oxidative stress and inflammation, whereas the level of HMGB1 increase reflects the activity of the innate immune system and represents levels within which the disease can be kept under control.
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Affiliation(s)
- Ilijana Grigorov
- Institute for Biological Research “Siniša Stanković”—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia
| | - Snežana Pejić
- Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (S.P.); (A.T.); (D.D.); (F.V.); (J.M.V.); (K.B.)
| | - Ana Todorović
- Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (S.P.); (A.T.); (D.D.); (F.V.); (J.M.V.); (K.B.)
| | - Dunja Drakulić
- Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (S.P.); (A.T.); (D.D.); (F.V.); (J.M.V.); (K.B.)
| | - Filip Veljković
- Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (S.P.); (A.T.); (D.D.); (F.V.); (J.M.V.); (K.B.)
| | - Jadranka Miletić Vukajlović
- Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (S.P.); (A.T.); (D.D.); (F.V.); (J.M.V.); (K.B.)
| | - Katarina Bobić
- Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (S.P.); (A.T.); (D.D.); (F.V.); (J.M.V.); (K.B.)
| | - Ivan Soldatović
- Institute of Medical Statistics and Informatic, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia;
| | - Siniša Đurašević
- Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia; (S.Đ.); (N.J.)
| | - Nebojša Jasnić
- Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia; (S.Đ.); (N.J.)
| | - Sanja Stanković
- Center for Medical Biochemistry, University Clinical Center of Serbia, 11000 Belgrade, Serbia;
| | - Sofija Glumac
- Institute of Pathology, School of Medicine, University of Belgrade, 11000 Belgrade, Serbia; (S.G.); (V.M.-V.); (B.M.)
| | - Violeta Mihailović-Vučinić
- Institute of Pathology, School of Medicine, University of Belgrade, 11000 Belgrade, Serbia; (S.G.); (V.M.-V.); (B.M.)
- Clinic for Pulmonary Diseases, University Clinical Center of Serbia, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
| | - Branislava Milenković
- Institute of Pathology, School of Medicine, University of Belgrade, 11000 Belgrade, Serbia; (S.G.); (V.M.-V.); (B.M.)
- Clinic for Pulmonary Diseases, University Clinical Center of Serbia, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia
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Miletić Vukajlović J, Drakulić D, Pejić S, Ilić TV, Stefanović A, Petković M, Schiller J. Increased plasma phosphatidylcholine/lysophosphatidylcholine ratios in patients with Parkinson's disease. Rapid Commun Mass Spectrom 2020; 34:e8595. [PMID: 31519070 DOI: 10.1002/rcm.8595] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 09/03/2019] [Accepted: 09/08/2019] [Indexed: 06/10/2023]
Abstract
RATIONALE Changes in lipid composition might be associated with the onset and progression of various neurodegenerative diseases. Herein, we investigated the changes in the plasma phosphatidylcholine (PC)/lysophosphatidylcholine (LPC) ratios in patients with Parkinson's disease (PD) in comparison with healthy subjects and their correlation with clinico-pathological features. METHODS The study included 10 controls and 25 patients with PD. All patients were assigned to groups based on clinico-pathological characteristics (gender, age at examination, duration of disease and Hoehn and Yahr (H&Y) stage). The analysis of the PC/LPC intensity ratios in plasma lipid extracts was performed using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. RESULTS PD patients exhibited an increased PC/LPC intensity ratio in comparison with the control group of healthy subjects. Furthermore, the investigated ratio was shown to be correlated with clinico-pathological parameters, in particular with H&Y stage and disease duration. The PC/LPC intensity ratio in plasma samples of PD patients was found to be elevated in all examined H&Y stages and throughout the disease duration. CONCLUSIONS To our knowledge, this is the first study examining the PC/LPC ratios in plasma of patients with PD and illustrating their correlation with clinico-pathological features. Although the presented results may be considered as preliminary due to the limited number of participants, the observed alterations of PC/LPC ratios in plasma might be a first step in the characterization of plasma lipid changes in PD patients and an indicator of lipid reconfiguration.
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Affiliation(s)
- Jadranka Miletić Vukajlović
- Department of Physical Chemistry, VINČA Institute of Nuclear Sciences - University of Belgrade, Belgrade, Republic of Serbia
| | - Dunja Drakulić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences - University of Belgrade, Belgrade, Republic of Serbia
| | - Snežana Pejić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences - University of Belgrade, Belgrade, Republic of Serbia
| | - Tihomir V Ilić
- Medical Faculty of Medical Military Academy, Clinic of Neurology, University of Defense, Belgrade, Republic of Serbia
| | - Aleksandra Stefanović
- Department of Medical Biochemistry, Faculty of Pharmacy - University of Belgrade, Belgrade, Republic of Serbia
| | - Marijana Petković
- Madeira Chemistry Research Centre, University of Madeira, Funchal, Portugal
- Department of Atomic Physics, VINČA Institute of Nuclear Sciences - University of Belgrade, Belgrade, Republic of Serbia
| | - Jürgen Schiller
- Institute of Medical Physics and Biophysics, Medical Department, University of Leipzig, Leipzig, Germany
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Mitrović N, Dragić M, Zarić M, Drakulić D, Nedeljković N, Grković I. Estrogen receptors modulate ectonucleotidases activity in hippocampal synaptosomes of male rats. Neurosci Lett 2019; 712:134474. [PMID: 31479724 DOI: 10.1016/j.neulet.2019.134474] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 08/23/2019] [Accepted: 08/30/2019] [Indexed: 11/18/2022]
Abstract
Extracellular adenine nucleotides and nucleosides, such as adenosine-5'-triphosphate (ATP) and adenosine, are among least investigated signaling factors that participate in 17β-estradiol (E2)-mediated synaptic rearrangements in rodent hippocampus. Their levels in the extrasynaptic space are tightly controlled by ecto-nucleoside triphosphate diphosphohydrolases1-3 (NTPDase1-3)/ecto-5'-nucleotidase (eN) enzyme chain. Therefore, the aim of the present study was to get closer insight in the E2-induced decrease in NTPDase and eN activity in the hippocampal synaptic compartment of male rats and to identify estradiol receptors (ERs i.e. ERα, ERβ or GPER1) responsible for the observed effects of E2. In this study we show indiscriminate participation of estradiol receptor α (ERα), -β (ERβ) and G- protein coupled estrogen receptor 1 (GPER1) in the mediation of E2 actions in hippocampal synaptosomes of male rats. Synaptic NTPDase1-3 activities are modulated only through activation of ERβ, while activation of ERα, -β and/or non-classical GPER1 decreases synaptic eN activity. Since both ATP and adenosine function as neuromodulators in the hippocampal networks, influencing its function, profound knowledge of mechanisms by which ectonucleotidases are regulated/modulated is of great importance.
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Affiliation(s)
- Nataša Mitrović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia.
| | - Milorad Dragić
- Department for General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Studentski trg 3, 11001 Belgrade, Serbia
| | - Marina Zarić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Dunja Drakulić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Nadežda Nedeljković
- Department for General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Studentski trg 3, 11001 Belgrade, Serbia
| | - Ivana Grković
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
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Grković I, Drakulić D, Martinović J, Mitrović N. Role of Ectonucleotidases in Synapse Formation During Brain Development: Physiological and Pathological Implications. Curr Neuropharmacol 2019; 17:84-98. [PMID: 28521702 PMCID: PMC6341498 DOI: 10.2174/1570159x15666170518151541] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 04/19/2017] [Accepted: 05/16/2017] [Indexed: 12/24/2022] Open
Abstract
Background
Extracellular adenine nucleotides and nucleosides, such as ATP and adenosine, are among the most recently identified and least investigated diffusible signaling factors that contribute to the structural and functional remodeling of the brain, both during embryonic and postnatal development. Their levels in the extracellular milieu are tightly controlled by various ectonucleotidases: ecto-nucleotide pyrophosphatase/phosphodiesterases (E-NPP), alkaline phosphatases (AP), ecto-nucleoside triphosphate diphosphohydrolases (E-NTPDases) and ecto-5'-nucleotidase (eN). Methods
Studies related to the expression patterns of ectonucleotidases and their known features during brain development are reviewed, highlighting involvement of these enzymes in synapse formation and maturation in physiological as well as in pathological states. Results
During brain development and in adulthood all ectonucleotidases have diverse expression pattern, cell specific localization and function. NPPs are expressed at early embryonic days, but the expression of NPP3 is reduced and restricted to ependymal area in adult brain. NTPDase2 is dominant ectonucleotidase existing in the progenitor cells as well as main astrocytic NTPDase in the adult brain, while NTPDase3 is fully expressed after third postnatal week, almost exclusively on varicose fibers. Specific brain AP is functionally associated with synapse formation and this enzyme is sufficient for adenosine production during neurite growth and peak of synaptogenesis. eN is transiently associated with synapses during synaptogenesis, however in adult brain it is more glial than neuronal enzyme. Conclusion
Control of extracellular adenine nucleotide levels by ectonucleotidases are important for understanding the role of purinergic signaling in developing tissues and potential targets in developmental disorders such as autism.
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Affiliation(s)
- Ivana Grković
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Dunja Drakulić
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Jelena Martinović
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Nataša Mitrović
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
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Grković I, Mitrović N, Dragić M, Adžić M, Drakulić D, Nedeljković N. Spatial Distribution and Expression of Ectonucleotidases in Rat Hippocampus After Removal of Ovaries and Estradiol Replacement. Mol Neurobiol 2018; 56:1933-1945. [PMID: 29978426 DOI: 10.1007/s12035-018-1217-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 06/29/2018] [Indexed: 01/14/2023]
Abstract
Purinergic signaling is the main synaptic and non-synaptic signaling system in brain. ATP acts as a fast excitatory transmitter, while adenosine sets a global inhibitory tone within hippocampal neuronal networks. ATP and adenosine are interconnected by ectonucleotidase enzymes, which convert ATP to adenosine. Existing data point to the converging roles of ovarian steroids and purinergic signaling in synapse formation and refinement and synapse activity in the hippocampus. Therefore, in the present study, we have used enzyme histochemistry and expression analysis to obtain data on spatial distribution and expression of ecto-enzymes NTPDase1, NTPDase2, and ecto-5'-nucleotidase (eN) after removal of ovaries (OVX) and estradiol replacement (E2) in female rat hippocampus. The results show that target ectonucleotidases are predominantly localized in synapse-rich hippocampal layers. The most represented NTPDase in the hippocampal tissue is NTPDase2, being at the same time the mostly affected ectonucleotidase by OVX and E2. Specifically, OVX decreases the expression of NTPDase2 and eN, whereas E2 restores their expression to control level. Impact of OVX and E2 on ectonucleotidase expression was also examined in purified synaptosome (SYN) and gliosome (GLIO) fractions. Data reveal that SYN expresses NTPDase1 and NTPDase2, both of which are reduced following OVX and restored with E2. GLIO exhibits NTPDase2-mediated ATP hydrolysis, which falls in OVX, and recovers by E2. These changes in the activity occur without parallel changes in NTPDase2-protein abundance. The same holds for eN. The lack of correlation between NTPDase2 and eN activities and their respective protein abundances suggest a non-genomic mode of E2 action, which is studied further in primary astrocyte culture. Since ovarian steroids shape hippocampal synaptic networks and regulate ectonucleotidase activities, it is possible that cognitive deficits seen after ovary removal may arise from the loss of E2 modulatory actions on ectonucleotidase expression in the hippocampus.
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Affiliation(s)
- Ivana Grković
- Department of Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia.
| | - Nataša Mitrović
- Department of Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia
| | - Milorad Dragić
- Department of Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia
- Department for General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Studentski trg 3, Belgrade, 11001, Serbia
| | - Marija Adžić
- Department for General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Studentski trg 3, Belgrade, 11001, Serbia
| | - Dunja Drakulić
- Department of Molecular Biology and Endocrinology, Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia
| | - Nadežda Nedeljković
- Department for General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Studentski trg 3, Belgrade, 11001, Serbia
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Miletić J, Drakulić D, Pejić S, Petković M, Ilić TV, Miljković M, Stefanović A, Prostran M, Stojanov M. Prooxidant-antioxidant balance, advanced oxidation protein products and lipid peroxidation in Serbian patients with Parkinson's disease. Int J Neurosci 2017; 128:600-607. [PMID: 29148896 DOI: 10.1080/00207454.2017.1403916] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Biomarkers of oxidative stress are relevant in the evaluation of the disease status and prooxidant-antioxidant balance, advanced oxidation protein products and lipid peroxidation products (malondialdehyde and 4-hydroxynonenal) are being extensively evaluated regarding their relationship with clinical presentation and disease severity. AIM OF THE STUDY The aim of this study was to evaluate the levels of the above-mentioned parameters in plasma of 39 men and 17 women with Parkinson's disease, originated from the Republic of Serbia and their relation to clinicopathological characteristics (gender, age at examination, duration of the disease, and Hoehn and Yahr score) and oxidative status. RESULTS The incidence of disease was 2:1 towards males. The investigated oxidative parameters were gender and Hoehn and Yahr related. Significant association of higher Hoehn and Yahr scores was observed for malondialdehyde (p = 0.01) and prooxidant-antioxidant balance (p = 0.02). Relation between oxidant-antioxidant status was further supported by observed positive correlation between 4-hydroxynonenal (p = 0.04) and prooxidant-antioxidant balance (p = 0.03). Finally, the multivariate analysis indicated that prooxidant-antioxidant balance and malondialdehyde were partially determined by gender (10.6% and 7.6%) and Hoehn and Yahr scores (13.6% and 18.8%), while Hoehn and Yahr scores contributed to the variance of advanced oxidation protein products with 13.2%. CONCLUSION Our results indicate the higher level of oxidative stress (oxidant-antioxidant imbalance) and possible relation of several markers with gender and disease stage in patients with Parkinson's disease. The analyzed markers could be used to specify the severity of oxidative stress; however, their potential value should be analyzed in further studies.
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Affiliation(s)
- Jadranka Miletić
- a Department of Physical Chemistry , VINČA Institute of Nuclear Sciences - University of Belgrade, Belgrade , Republic of Serbia
| | - Dunja Drakulić
- b Department of Molecular Biology and Endocrinology , VINČA Institute of Nuclear Sciences - University of Belgrade , Belgrade , Republic of Serbia
| | - Snežana Pejić
- b Department of Molecular Biology and Endocrinology , VINČA Institute of Nuclear Sciences - University of Belgrade , Belgrade , Republic of Serbia
| | - Marijana Petković
- a Department of Physical Chemistry , VINČA Institute of Nuclear Sciences - University of Belgrade, Belgrade , Republic of Serbia
| | - Tihomir V Ilić
- c Medical Faculty of Medical Military Academy, Clinic of Neurology , University of Defense , Belgrade , Republic of Serbia
| | - Milica Miljković
- d Department of Medical Biochemistry , Faculty of Pharmacy - University of Belgrade , Belgrade , Republic of Serbia
| | - Aleksandra Stefanović
- d Department of Medical Biochemistry , Faculty of Pharmacy - University of Belgrade , Belgrade , Republic of Serbia
| | - Milica Prostran
- e Department of Pharmacology, Clinical Pharmacology and Toxicology , School of Medicine - University of Belgrade , Belgrade , Republic of Serbia
| | - Marina Stojanov
- d Department of Medical Biochemistry , Faculty of Pharmacy - University of Belgrade , Belgrade , Republic of Serbia
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Joksić G, Mićić M, Filipović J, Drakulić D, Stanojlović M, Čalija B, Valenta Šobot A, Demajo M, Nilsson R. Cell proliferation assay – method optimisation for in vivo labeling of DNA in the rat forestomach. ACTA VET-BEOGRAD 2017. [DOI: 10.1515/acve-2017-0001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
The study of cell proliferation is a useful tool in the fields of toxicology, pathophysiology and pharmacology. Cell proliferation and its degree can be evaluated using 5-bromo-2′-deoxyuridine which is incorporated into the newly synthesized DNA. The aim of this study was the optimization of subcutaneous application of 5-bromo-2′-deoxyuridine implantation for continuous and persistent marking of proliferating cells in the rat forestomach. 3-tert-Butyl-4-hydroxyanisole was used as the agent that ensures cell proliferation. In order to determine the optimal dose for proliferating cells labeling, 5-bromo-2′-deoxyuridine doses of 50 mg, 100 mg, 200 mg or 350 mg were implemented 2 days prior to sacrifice by flat-faced cylindrical matrices. Immunohistochemical analysis using 5-bromo-2′-deoxyuridine in situ detection kit was performed for the detection of 5-bromo-2′-deoxyuridine labeled cells. The results showed that for adult rats, the optimum 5-bromo-2′-deoxyuridine dose is 200 mg per animal for subcutaneous application. The here described manner of 5-bromo-2′-deoxyuridine in vivo labeling provides a simple, efficient, and reliable method for cell labeling, and at the same minimizes stress to animals.
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Affiliation(s)
- Gordana Joksić
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Mileva Mićić
- Institute for Medical Research, University of Belgrade, Dr. Subotića Street 4, 11129 Belgrade, Serbia
| | - Jelena Filipović
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Dunja Drakulić
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Miloš Stanojlović
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Bojan Čalija
- Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, 11221 Belgrade, Serbia
| | - Ana Valenta Šobot
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Miroslav Demajo
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
| | - Robert Nilsson
- Vinča Institute of Nuclear Sciences, University of Belgrade, Mike Petrovica Alasa 12-14, 11001 Belgrade, Serbia
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9
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Mitrović N, Zarić M, Drakulić D, Martinović J, Sévigny J, Stanojlović M, Nedeljković N, Grković I. 17β-Estradiol-Induced Synaptic Rearrangements Are Accompanied by Altered Ectonucleotidase Activities in Male Rat Hippocampal Synaptosomes. J Mol Neurosci 2016; 61:412-422. [PMID: 27981418 DOI: 10.1007/s12031-016-0877-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 12/05/2016] [Indexed: 12/20/2022]
Abstract
17β-Estradiol (E2) rapidly, by binding to membrane estrogen receptors, activates cell signaling cascades which induce formation of new dendritic spines in the hippocampus of males as in females, but the interaction with other metabolic processes, such as extracellular adenine nucleotides metabolism, are currently unknown. Extracellular adenine nucleotides play significant roles, controlling excitatory glutamatergic synapses and development of neural circuits and synaptic plasticity. Their precise regulation in the synaptic cleft is tightly controlled by ecto-nucleoside triphosphate diphosphohydrolase (NTPDase)/ecto-5'-nucleotidase (eN) enzyme chain. Therefore, we sought to clarify whether a single systemic injection of E2 in male rats is accompanied by changes in the expression of the pre- and postsynaptic proteins and downstream kinases linked to E2-induced synaptic rearrangement as well as alterations in NTPDase/eN pathway in the hippocampal synaptosomes. Obtained data showed activation of mammalian target of rapamycin and upregulation of key synaptic proteins necessary for spine formation, 24 h after systemic E2 administration. In E2-mediated conditions, we found downregulation of NTPDase1 and NTPDase2 and attenuation of adenine nucleotide hydrolysis by NTPDase/eN enzyme chain, without changes in NTPDase3 properties and augmentation of synaptic tissue-nonspecific alkaline phosphatase (TNAP) activity. Despite reduced NTPDase activities, increased TNAP activity probably prevents toxic accumulation of ATP in the extracellular milieu and also hydrolyzes accumulated ADP due to unchanged NTPDase3 activity. Thus, our initial evaluation supports idea of specific roles of different ectonucleotidases and their coordinated actions in E2-mediated spine remodeling and maintenance.
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Affiliation(s)
- Nataša Mitrović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia
| | - Marina Zarić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia
| | - Dunja Drakulić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia
| | - Jelena Martinović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia
| | - Jean Sévigny
- Département de microbiologie-infectiologie et d'immunologie, Faculté de Médecine, Université Laval, Québec, QC, G1V 0A6, Canada.,Centre de recherche du CHU de Québec, Université Laval, Québec, QC, G1V 4G2, Canada
| | - Miloš Stanojlović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia
| | - Nadežda Nedeljković
- Institute for Physiology and Biochemistry, Faculty of Biology, University of Belgrade, Studentski trg 3, Belgrade, 11000, Serbia
| | - Ivana Grković
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, Belgrade, 11001, Serbia.
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10
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Grković I, Bjelobaba I, Mitrović N, Lavrnja I, Drakulić D, Martinović J, Stanojlović M, Horvat A, Nedeljković N. Expression of ecto-nucleoside triphosphate diphosphohydrolase3 (NTPDase3) in the female rat brain during postnatal development. J Chem Neuroanat 2016; 77:10-18. [DOI: 10.1016/j.jchemneu.2016.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 03/16/2016] [Accepted: 04/01/2016] [Indexed: 11/15/2022]
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11
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Mitrović N, Guševac I, Drakulić D, Stanojlović M, Zlatković J, Sévigny J, Horvat A, Nedeljković N, Grković I. Regional and sex-related differences in modulating effects of female sex steroids on ecto-5'-nucleotidase expression in the rat cerebral cortex and hippocampus. Gen Comp Endocrinol 2016; 235:100-107. [PMID: 27296672 DOI: 10.1016/j.ygcen.2016.06.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 11/03/2015] [Accepted: 06/09/2016] [Indexed: 12/20/2022]
Abstract
Ecto-5'-nucleotidase (eN), a membrane rate-limiting enzyme of the purine catabolic pathway, catalyzes the conversion of AMP to adenosine involved in the regulation of many brain physiological and pathological processes. Since gender fundamentally determines hormonal milieu in the body and brain, it is reasonable to assume that sex differences in the activity of various signaling systems, including adenosine, may be generated by gonadal steroids. Thus, we examined expression of eN as a component of adenosine signaling system in the basal state in cerebral cortex and hippocampus of male and female rats at gene, protein and functional level, as well as in the state of gonadal hormone deprivation, induced by ovariectomy (OVX), whereas impact of steroid hormones was explored after repeated administration of 17α-estradiol, 17β-estradiol and progesterone for seven consecutive days. Results showed regional and sex-related differences in basal eN activity level, with the highest AMP hydrolysis observed in the hippocampus of male rats. Furthermore, ovarian steroids do not contribute to basal gene eN expression or the activity in cortical and hippocampal region of female rats. However, protein eN expression was increased in OVX rats in both investigated region. Investigated exogenous steroids had no influence on eN expression in male brain, while in OVX females alterations in eN activity were induced. The observed effects in female rats were different between examined regions e.g. in cortex, applied treatments predominantly decreased whereas in hippocampus increased eN activity. Based on the presented results, eN exerts regional and sex-related response in basal state as well as after treatment with female gonadal hormones, however the exact mechanisms of sex steroids actions on eN remain unclear and should be fully explored.
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Affiliation(s)
- Nataša Mitrović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Ivana Guševac
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Dunja Drakulić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Miloš Stanojlović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Jelena Zlatković
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Jean Sévigny
- Département de microbiologie-infectiologie et d'immunologie, Faculté de Médecine, Université Laval, Québec G1V 0A6, QC, Canada; Centre de recherche du CHU de Québec, G1V 4G2 QC, Canada
| | - Anica Horvat
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Nadežda Nedeljković
- Institute for Physiology and Biochemistry, Faculty of Biology, University of Belgrade, Studentski trg 3, 11000 Belgrade, Serbia
| | - Ivana Grković
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia.
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12
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Nilsson R, Mićić M, Filipović J, Šobot AV, Drakulić D, Stanojlović M, Joksiċ G. Inhibition by blueberries (bilberries) and extract from milk thistle of rat forestomach hyperplasia induced by oral smokeless tobacco (Swedish snus). Regul Toxicol Pharmacol 2016; 76:94-101. [PMID: 26828024 DOI: 10.1016/j.yrtph.2016.01.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 01/20/2016] [Accepted: 01/25/2016] [Indexed: 01/30/2023]
Abstract
The aim of this study was to identify palatable additives which have a significant protective action against soft tissue changes in the oral cavity caused by Swedish smokeless tobacco ("snus"), and that satisfy existing legal requirements. Although the cancer risk from snus is extremely low, long term use may result in highly undesirable keratotic lesions and associated epithelial abnormalities in the oral cavity. The rat forestomach, which is vulnerable to the irritative action of non-genotoxic compounds like butylated hydroxyanisole, propionic acid as well as snus, was chosen as an experimental model. Studied toxicological endpoints included histopathology and cellular proliferation based on DNA incorporation of bromodeoxyuridine. After 6 weeks' exposure, blueberries (bilberries) and an extract from the common milk thistle were found to exert a highly significant inhibition of cell proliferation induced by snus in the rat forestomach epithelium, indicating a potential protection with respect soft tissue changes in the human oral cavity.
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Affiliation(s)
- Robert Nilsson
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia.
| | - Mileva Mićić
- Institute for Medical Investigation, University of Belgrade, Serbia
| | - Jelena Filipović
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
| | - Ana Valenta Šobot
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
| | - Dunja Drakulić
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
| | - Miloš Stanojlović
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
| | - Gordana Joksiċ
- Vinča Institute of Nuclear Sciences, Laboratory for Physical Chemistry, University of Belgrade, Vinča, Belgrade, Serbia
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13
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Mitrović N, Zarić M, Drakulić D, Martinović J, Stanojlović M, Sévigny J, Horvat A, Nedeljković N, Grković I. 17β-Estradiol upregulates ecto-5'-nucleotidase (CD73) in hippocampal synaptosomes of female rats through action mediated by estrogen receptor-α and -β. Neuroscience 2016; 324:286-96. [PMID: 26987957 DOI: 10.1016/j.neuroscience.2016.03.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 02/23/2016] [Accepted: 03/08/2016] [Indexed: 02/06/2023]
Abstract
17β-Estradiol (E2) crucially affects several processes in the hippocampus of both sexes. E2 acts upon estradiol receptors ERα and ERβ, influencing target gene expression and/or modulates intracellular signaling cascades. Another potent modulator of hippocampal function is nucleoside adenosine, the final product of ectonucleotidase cascade, enzymes which hydrolyze extracellular ATP to adenosine. The last and rate-limiting step of the hydrolysis is catalyzed by membrane-bound ecto-5'-nucleotidase (eN). Previous findings obtained on adenosine metabolism in brain suggest that eN may be modulated by ovarian steroids. Therefore, the present study reports that the activity and protein abundance of membrane-bound eN fluctuates across the estrus cycle in the hippocampal synaptosomes of female rats. Further, we analyzed the role of E2 and its intracellular receptors on the expression of eN in ovariectomized females. We found that E2 upregulated eN activity and protein abundance in the hippocampal synaptosomes. Application of nonspecific ER antagonist, ICI 182,780 and selective ERα and ERβ agonists, PPT and DPN, respectively, demonstrated the involvement of both receptor subtypes in observed actions. Selective ERα receptor agonist, PPT, induced upregulation of both the protein level and activity of eN, while application of selective ERβ receptor agonist, DPN, increased only the activity of eN. In both cases, E2 entered into the intracellular compartment and activated ER(s), which was demonstrated by membrane impermeable E2-BSA conjugate. Together these results imply that E2-induced effects on connectivity and functional properties of the hippocampal synapses may be in part mediated through observed effect on eN.
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Affiliation(s)
- N Mitrović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - M Zarić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - D Drakulić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - J Martinović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - M Stanojlović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - J Sévigny
- Département de microbiologie-infectiologie et d'immunologie, Faculté de Médecine, Université Laval, Québec G1V 0A6, QC, Canada; Centre de recherche du CHU de Québec - Université Laval, G1V 4G2 QC, Canada
| | - A Horvat
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - N Nedeljković
- Institute for Physiology and Biochemistry, Faculty of Biology, University of Belgrade, Studentski trg 3, 11000 Belgrade, Serbia
| | - I Grković
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia.
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14
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Stanojlović M, Guševac I, Grković I, Mitrović N, Zlatković J, Horvat A, Drakulić D. Repeated Estradiol Treatment Attenuates Chronic Cerebral Hypoperfusion-Induced Neurodegeneration in Rat Hippocampus. Cell Mol Neurobiol 2015; 36:989-999. [PMID: 26689702 DOI: 10.1007/s10571-015-0289-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 10/14/2015] [Indexed: 11/28/2022]
Abstract
Although a substantial number of pre-clinical and experimental studies have investigated effects of 17β-estradiol, its precise molecular mechanism of action in the early state of chronic cerebral hypoperfusion remains controversial. The present study attempted to verify whether post-ischemic estradiol treatment (33.3 μg/kg for seven consecutive days) affects previously reported number of hippocampal apoptotic cells and amount of DNA fragmentation characteristic for apoptosis as well as the expression of key elements within synaptosomal Akt and Erk signal transduction pathways (NF-κB, Bax, Bcl-2, cytochrome C, caspase 3, and PARP). Additionally, alterations of aforementioned molecules linked to protection in various neurodegenerative disorders were monitored in the cytosolic, mitochondrial, and nuclear fractions associating investigated kinases and NF-κB with gene expression of their downstream effectors-Bcl-2, Bax, and caspase 3. The results revealed that an initial increase in the number of apoptotic cells and amount of DNA fragmentation induced by chronic cerebral hypoperfusion was significantly reduced by 17β-estradiol. In synaptic regions, an altered profile with respect to the protein expression of Bcl-2 and phosphorylated Akt was detected, although the level of other examined proteins was not modified. In other investigated sub-cellular fractions, 17β-estradiol elicited phosphorylation and translocation of Akt and Erk along with modulation of the expression of their subsequent effectors. Our findings support the concept that repeated post-ischemic 17β-estradiol treatment attenuates neurodegeneration induced by chronic cerebral hypoperfusion in hippocampus through the activation of investigated kinases and regulation of their downstream molecules in sub-cellular manner indicating a time window and regime of its administration as a valid therapeutic intervention.
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Affiliation(s)
- Miloš Stanojlović
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, P.O.Box 522, Belgrade, 11001, Republic of Serbia
| | - Ivana Guševac
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, P.O.Box 522, Belgrade, 11001, Republic of Serbia
| | - Ivana Grković
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, P.O.Box 522, Belgrade, 11001, Republic of Serbia
| | - Nataša Mitrović
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, P.O.Box 522, Belgrade, 11001, Republic of Serbia
| | - Jelena Zlatković
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, P.O.Box 522, Belgrade, 11001, Republic of Serbia
| | - Anica Horvat
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, P.O.Box 522, Belgrade, 11001, Republic of Serbia
| | - Dunja Drakulić
- Department of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, P.O.Box 522, Belgrade, 11001, Republic of Serbia.
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15
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Stanojlović M, Guševac I, Grković I, Zlatković J, Mitrović N, Zarić M, Horvat A, Drakulić D. Effects of chronic cerebral hypoperfusion and low-dose progesterone treatment on apoptotic processes, expression and subcellular localization of key elements within Akt and Erk signaling pathways in rat hippocampus. Neuroscience 2015; 311:308-21. [DOI: 10.1016/j.neuroscience.2015.10.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 10/19/2015] [Accepted: 10/21/2015] [Indexed: 12/12/2022]
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16
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Petrović S, Takić M, Arsić A, Vučić V, Drakulić D, Milošević M, Glibetić M. Effect of sex hormones on plasma phospholipid fatty acid composition in intact rats and rats with bilaterally occluded carotid arteries. Physiol Res 2014; 63:331-9. [PMID: 24564600 DOI: 10.33549/physiolres.932590] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The effects of 8-days treatment with 17alpha-estradiol (33.3 microg/kg) and progesterone (1.7 mg/kg) on plasma lipids and fatty acid composition of plasma phospholipids were examined in intact (INT) and bilaterally common carotid arteries occluded (BCO) male Wistar rats. Significant decrease of triglyceride level was found in BCO rats after the estradiol treatment. Both hormones elevated proportion of 18:1n-7 fatty acid in INT, but they failed to have such an effect in BCO. Estradiol increased 22:5n-3 and total n-3 polyunsaturated fatty acids (PUFA) in intact, and decreased 18:2n-6 in BCO rats. Significantly lower level of total n-3 was found in progesterone-treated than in estradiol-treated BCO rats. Given that n-3 PUFA have many beneficial effects on cell and tissue function, while n-6 PUFA have mostly the opposite effects, estradiol, rather than progesterone, was seen to improve plasma lipids and phospholipids FA profiles in INT and BCO animals. Estradiol significantly elevated the estimated activity of delta9-desaturases and progesterone of delta5-desaturase in BCO group, with no effects in INT rats.
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Affiliation(s)
- S Petrović
- Institute for Medical Research University of Belgrade, Centre of Research Excellence in Nutrition and Metabolism, Belgrade, Serbia.
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17
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Stanojlović M, Horvat A, Guševac I, Grković I, Mitrović N, Buzadžić I, Drakulić D. Time course of cerebral hypoperfusion-induced neurodegenerative changes in the cortex of male and female rats. Folia Biol (Praha) 2014; 60:123-132. [PMID: 25056435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
To study time-dependent and gender-specific intracellular and biochemical mechanisms that lead to neurodegeneration due to moderate but persistent reduction of cerebral blood flow, adult male and female Wistar rats were divided into two main groups - controls that underwent sham operation and animals subjected to permanent bilateral occlusion of common carotid arteries. Animals were sacrificed 3, 7 or 90 days following the insult. Expression of several apoptotic proteins in synaptic fractions along with Fluoro-Jade B staining and DNA fragmentation assay were used to estimate the apoptotic processes and potential neurodegeneration in cerebral cortex. Data suggest a time-specific increase of Bax as well as time- and gender-associated downregulation in protein expression of Bcl-2, up-regulation of procaspase 3, accompanied with increased cleavage of procaspase 3 and PARP in synaptic terminals. Furthermore, time- but not gender-specific neurodegeneration was observed. Our findings support the concept of time- and gender-associated response to permanent bilateral occlusion of common carotid arteries, which would enable better understanding of the mechanisms underlying cerebral hypoperfusion.
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Affiliation(s)
- M Stanojlović
- Laboratory of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Serbia
| | - A Horvat
- Laboratory of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Serbia
| | - I Guševac
- Laboratory of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Serbia
| | - I Grković
- Laboratory of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Serbia
| | - N Mitrović
- Laboratory of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Serbia
| | - I Buzadžić
- Department of Human Genetics and Prenatal Diagnostics, ZVEZDARA University Medical Hospital, Belgrade, Serbia
| | - D Drakulić
- Laboratory of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, Serbia
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18
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Drakulić D, Veličković N, Stanojlović M, Grković I, Mitrović N, Lavrnja I, Horvat A. Low-dose dexamethasone treatment promotes the pro-survival signalling pathway in the adult rat prefrontal cortex. J Neuroendocrinol 2013; 25:605-16. [PMID: 23551329 DOI: 10.1111/jne.12037] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 02/15/2013] [Accepted: 03/24/2013] [Indexed: 11/29/2022]
Abstract
Synthetic glucocorticoid dexamethasone (DEX), a highly potent anti-inflammatory and immunosuppressive agent, is widely used in the treatment of brain cancer, as well as for inflammatory and autoimmune diseases. The present study aimed to determine whether low-dose subchronic DEX treatment (100 μg/kg for eight consecutive days) exerts long-term effects on apoptosis in the adult rat prefrontal cortex (PFC) by examining the expression of cell death-promoting molecules [poly(ADP-ribose) polymerase (PARP), p53, procaspase 3, cleaved caspase 3, Bax] and cell-survival molecules (AKT, Bcl-2). The results obtained revealed that body, thymus and adrenal gland weights, as well corticosterone levels, in the serum and PFC were reduced 1 day after the last DEX injection. In the PFC, DEX caused activation of AKT, augmentation of pro-survival Bcl-2 protein and an enhanced Bcl-2/Bax protein ratio, as well Bcl-2 translocation to the mitochondria. An unaltered profile with respect to the protein expression of apoptotic molecules PARP, procaspase 3 and Bax was detected, whereas p53 protein was decreased. Reverse transcriptase -polymerase chain reaction analysis showed a decrease of p53 mRNA levels and no significant difference in Bcl-2 and Bax mRNA expression in DEX-treated rats. Finally, a DNA fragmentation assay and Fluoro-Jade staining demonstrated no considerable changes in apoptosis in the rat PFC. Our findings support the concept that low-dose DEX creates a hypocorticoid state in the brain and also indicate that subchronic DEX treatment activates the pro-survival signalling pathway but does not change apoptotic markers in the rat PFC. This mechanism might be relevant for the DEX-induced apoptosis resistance observed during and after chemotherapy of patients with brain tumours.
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Affiliation(s)
- D Drakulić
- Laboratory of Molecular Biology and Endocrinology, VINCA Institute of Nuclear Sciences, University of Belgrade, 11001 Belgrade, Serbia.
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19
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Stanojević I, Drakulić D, Petrović S, Milošević M, Jovanović N, Horvat A. Kinetic characterization of ecto-nucleoside triphosphate diphosphohydrolases in brain nerve terminals during rat postnatal development. Russ J Phys Chem 2011. [DOI: 10.1134/s0036024411130292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Petrović S, Veličković N, Stanojević I, Milošević M, Drakulić D, Stanojlović M, Horvat A. Inhibition of mitochondrial Na+-dependent Ca²+ efflux by 17β-estradiol in the rat hippocampus. Neuroscience 2011; 192:195-204. [PMID: 21726603 DOI: 10.1016/j.neuroscience.2011.06.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 05/20/2011] [Accepted: 06/09/2011] [Indexed: 01/18/2023]
Abstract
Our results, as well as those of others, have indicated that 17β-estradiol (E2) exerts its nongenomic effects in neuronal cells by affecting plasma membrane Ca(2+) flux. In neuronal cells mitochondria possess Ca(2+) buffering properties as they both sequester and release Ca(2+). The goal of this study was to examine the rapid non-genomic effect of E2 on mitochondrial Ca(2+) transport in hippocampal synaptosomes from ovariectomised rats. In addition, we aimed to determine if, and to what extent, E2 receptors participated in mitochondrial Ca(2+) transport modulation by E2 in vitro. E2-specific binding and Ca(2+) transport was monitored. At physiological E2 concentrations (0.1-1.5 nmol/L), specific E2 binding to mitochondria isolated from hippocampal synaptosomes was detected with a B(max.) and K(m) of 37.6±2.6 fmol/mg protein and 0.69±0.14 nmol/L of free E2, respectively. The main mitochondrial Ca(2+) influx mechanism is the Ruthenium Red-sensitive uniporter driven by mitochondrial membrane potential. Despite no effect of E2 on Ca(2+) influx, a physiological E2 concentration (0.5 nmol/L) protected mitochondrial membrane potential and consequently Ca(2+) influx from the uncoupling agent carbonyl cyanide 4-(trifluoromethoxy)phenylhydrazone (1 μmol/L). In neuronal cells the predominant mitochondrial Ca(2+) efflux mechanism is the Na(+)/Ca(2+) exchanger. E2 caused Ca(2+) efflux inhibition (by 46%) coupled with increased affinity of the Na(+)/Ca(2+) exchanger for Na(+). Using E2 receptor (ERα and ERβ) antagonists and agonists, we confirmed ERβ's involvement in E2-induced mitochondrial membrane potential protection as well as Ca(2+) efflux inhibition. In summary, our results indicate that the non-genomic neuromodulatory role of E2 in rat hippocampus is achieved by affecting mitochondrial Ca(2+) transport via, in part, mitochondrial ERβ.
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Affiliation(s)
- S Petrović
- Laboratory for Molecular Biology and Endocrinology, Institute of Nuclear Sciences "Vinča", University of Belgrade, PO Box 522, 11001 Belgrade, Serbia
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Stanojević I, Bjelobaba I, Nedeljković N, Drakulić D, Petrović S, Stojiljković M, Horvat A. Ontogenetic profile of ecto‐5′‐nucleotidase in rat brain synaptic plasma membranes. Int J Dev Neurosci 2011; 29:397-403. [DOI: 10.1016/j.ijdevneu.2011.03.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 02/28/2011] [Accepted: 03/08/2011] [Indexed: 12/20/2022] Open
Affiliation(s)
- Ivana Stanojević
- Laboratory for Molecular Biology and EndocrinologyInstitute of Nuclear Sciences “Vinca”University of BelgradeMike Petrovica 12‐1411000BelgradeSerbia
| | - Ivana Bjelobaba
- Department of NeurobiologyInstitute for Biological Research “Sinisa Stankovic”University of BelgradeBulevar Despota Stevana 14211000BelgradeSerbia
| | - Nadežda Nedeljković
- Institute for Physiology and BiochemistryFaculty of BiologyUniversity of BelgradeStudentski trg 1611000BelgradeSerbia
| | - Dunja Drakulić
- Laboratory for Molecular Biology and EndocrinologyInstitute of Nuclear Sciences “Vinca”University of BelgradeMike Petrovica 12‐1411000BelgradeSerbia
| | - Snježana Petrović
- Laboratory for Molecular Biology and EndocrinologyInstitute of Nuclear Sciences “Vinca”University of BelgradeMike Petrovica 12‐1411000BelgradeSerbia
| | - Mirjana Stojiljković
- Department of NeurobiologyInstitute for Biological Research “Sinisa Stankovic”University of BelgradeBulevar Despota Stevana 14211000BelgradeSerbia
- Institute for Physiology and BiochemistryFaculty of BiologyUniversity of BelgradeStudentski trg 1611000BelgradeSerbia
| | - Anica Horvat
- Laboratory for Molecular Biology and EndocrinologyInstitute of Nuclear Sciences “Vinca”University of BelgradeMike Petrovica 12‐1411000BelgradeSerbia
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Stanojević I, Drakulić D, Veličković N, Milošević M, Petrović S, Horvat A. Effects of acute gamma-irradiation on extracellular adenine nucleotide hydrolysis in developing rat brain. Russ J Phys Chem 2009. [DOI: 10.1134/s0036024409090325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Milošević M, Petrović S, Stanojević I, Drakulić D, Veličković N, Horvat A. Effect of EDTA on copper-induced inhibition of rat myometrial ecto-ATPase activity. Russ J Phys Chem 2009. [DOI: 10.1134/s0036024409090313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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