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Polšek D, Botica A, Sabo T, Baković M, Marinović V, Arbanas G. Psychiatric care in Croatia during COVID-19 lockdown and earthquake: significant decrease in admissions to University Psychiatric Hospital Vrapce in Zagreb. Eur Psychiatry 2022. [PMCID: PMC9563220 DOI: 10.1192/j.eurpsy.2022.508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction The COVID-19 pandemic has had an enormous impact on both physical and mental health of people around the world. Objectives The aim of the study was to evaluate the number and characteristics of people seeking emergency psychiatric help during combined psychosocial stressful events in March 2020. Methods Data for 3927 patients seeking emergency psychiatric help were collected and analyzed for the months preceding, during and after lockdown due to COVID-19 pandemic and concomitant earthquake that took place on 22nd March 2020 in Zagreb, and compared with the same months of 2019. Results A significant decrease in both the number of visits and admissions to the hospital was found for the month of lockdown. There was a significant decrease in the number of out-patients visits and day hospital admissions. Compared with other months, more women and younger patients sought help. There was a significant rise in the number of patients presenting with suicidal thoughts, as well as a larger percentage of involuntary admissions. Conclusions Overall less people sought psychiatric help in the face of an unpredictable acute threat, which was interpreted in the light of prioritizing fear of infection over mental health issues. Alternatively, it is possible that people threatened with immediate danger mobilize short- term compensatory psychological resources which help deal with or put off mental illness. This research was conducted as part of the project of the Croatian Science Foundation CORONA-04-2086 Life in the time of COVID-19-social implications on the security and well-being of vulnerable groups in the European context. Disclosure No significant relationships.
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Tubić B, Dobričić V, Poljarević J, Savić A, Sabo T, Marković B. Estimation of passive gastrointestinal absorption and membrane retention using PAMPA test, quantitative structure-permeability and quantitative structure-retention relationship analyses of ethylenediamine-N,N'-di-2-(3-cyclohexyl)propanoic acid and 1,3-propanediamine-N,N'-di-2-(3-cyclohexyl)propanoic acid derivatives. J Pharm Biomed Anal 2020; 184:113213. [PMID: 32126457 DOI: 10.1016/j.jpba.2020.113213] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 02/23/2020] [Accepted: 02/24/2020] [Indexed: 11/30/2022]
Abstract
Passive gastrointestinal absorption and membrane retention of twelve esters of (S,S)-ethylenediamine-N,N'-di-2-(3-cyclohexyl)propanoic acid (EDCP) and (S,S)-1,3-propanediamine-N,N'-di-2-(3-cyclohexyl)propanoic acid (PDCP), as well as of these two non-esterified acids were estimated using PAMPA test. Artificial PAMPA membrane used in this study for the simulation of gastrointestinal barrier was solution of egg lecithin in dodecane (1 % w/v). All tested compounds belong to class III (high membrane retention and low permeation), whereas EDCP, dipentyl ester of PDCP (DPE-PDCP) and diisopentyl ester of PDCP (DIPE-PDCP) belong to class I (negligible membrane retention and low permeation). Finally, quantitative structure - permeability and structure - retention relationships models were created in order to find quantitative relationships between physico-chemical properties of tested compounds and PAMPA membrane permeability/membrane retention parameters. Statistically the most reliable models were analysed and used for the design of new compounds for which favourable membrane permeability and retention can be expected.
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Affiliation(s)
- Biljana Tubić
- Department of Pharmaceutical Chemistry, University of Belgrade-Faculty of Pharmacy, Vojvode Stepe 450, 11000 Belgrade, Serbia
| | - Vladimir Dobričić
- Department of Pharmaceutical Chemistry, University of Belgrade-Faculty of Pharmacy, Vojvode Stepe 450, 11000 Belgrade, Serbia.
| | - Jelena Poljarević
- Department of General and Inorganic Chemistry, University of Belgrade - Faculty of Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia
| | - Aleksandar Savić
- Department of General and Inorganic Chemistry, University of Belgrade - Faculty of Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia
| | - Tibor Sabo
- Department of General and Inorganic Chemistry, University of Belgrade - Faculty of Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia
| | - Bojan Marković
- Department of Pharmaceutical Chemistry, University of Belgrade-Faculty of Pharmacy, Vojvode Stepe 450, 11000 Belgrade, Serbia
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Misirlic-Dencic S, Poljarevic J, Isakovic AM, Sabo T, Markovic I, Trajkovic V. Current Development of Metal Complexes with Diamine Ligands as Potential Anticancer Agents. Curr Med Chem 2020; 27:380-410. [DOI: 10.2174/0929867325666181031114306] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 09/20/2018] [Accepted: 09/22/2018] [Indexed: 01/21/2023]
Abstract
Background::
The discovery of cisplatin and the subsequent research revealed the importance
of dinitrogen-containing moiety for the anticancer action of metal complexes. Moreover, certain
diamine ligands alone display cytotoxicity that contributes to the overall activity of corresponding
complexes.
Objective::
To summarize the current knowledge on the anticancer efficacy, selectivity, and the mechanisms
of action of metal complexes with various types of diamine ligands.
Method::
The contribution of aliphatic acyclic, aliphatic cyclic, and aromatic diamine ligands to the
anticancer activity and selectivity/toxicity of metal complexes with different metal ions were analyzed
by comparison with organic ligand alone and/or conventional platinum-based chemotherapeutics.
Results::
The aliphatic acyclic diamine ligands are present mostly in complexes with platinum. Aliphatic
cyclic diamines are part of Pt(II), Ru(II) and Au(III) complexes, while aromatic diamine ligands
are found in Pt(II), Ru(II), Pd(II) and Ir(III) complexes. The type and oxidation state of metal ions
greatly influences the cytotoxicity of metal complexes with aliphatic acyclic diamine ligands. Lipophilicity
of organic ligands, dependent on alkyl-side chain length and structure, determines their cellular
uptake, with edda and eddp/eddip ligands being most useful in this regard. Aliphatic cyclic diamine
ligands improved the activity/toxicity ratio of oxaliplatin-type complexes. The complexes with aromatic
diamine ligands remain unexplored regarding their anticancer mechanism. The investigated complexes
mainly caused apoptotic or necrotic cell death.
Conclusion::
Metal complexes with diamine ligands are promising candidates for efficient and more
selective alternatives to conventional platinum-based chemotherapeutics. Further research is required to
reveal the chemico-physical properties and molecular mechanisms underlying their biological activity.
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Affiliation(s)
- Sonja Misirlic-Dencic
- Institute of Medical and Clinical Biochemistry, School of Medicine, University of Belgrade, Pasterova 2, Belgrade 11,000, Serbia
| | - Jelena Poljarevic
- Faculty of Chemistry, University of Belgrade, Belgrade 11,000, Serbia
| | - Andjelka M. Isakovic
- Institute of Medical and Clinical Biochemistry, School of Medicine, University of Belgrade, Pasterova 2, Belgrade 11,000, Serbia
| | - Tibor Sabo
- Faculty of Chemistry, University of Belgrade, Belgrade 11,000, Serbia
| | - Ivanka Markovic
- Institute of Medical and Clinical Biochemistry, School of Medicine, University of Belgrade, Pasterova 2, Belgrade 11,000, Serbia
| | - Vladimir Trajkovic
- Institute of Microbiology and Immunology, School of Medicine, University of Belgrade, Belgrade 11,000, Serbia
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Bunt SC, Wanf HH, Straub JJ, Meredith-Duliba T, Didehbani N, Sabo T, Bell K, Batjer H, Cullum CM. Resiliency and Post-Concussion Symptoms in Adolescents with Sport-Related Concussions. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz026.43] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Purpose
Resiliency is a factor affecting an individual’s ability to “bounce back” from stressful events, including injury. A Sport-Related Concussion (SRC) may constitute a stressful event for athletes, yet the association of resiliency with symptoms following SRC is not well known. Thus, we sought to determine if a brief measure of resiliency was related to initial symptoms following SRC in adolescent athletes.
Methods
Subjects (n=458, 199 female, 259 male) aged 12–25 with SRC were evaluated within 30 days of injury (M= 8.35 days, SD=6.98) at a North Texas Concussion Registry (ConTex) clinic. Subjects completed the Sport Concussion Assessment Tool-5 symptom evaluation and the Brief Resiliency Scale (BRS). Subjects were grouped into low (n=56,) average (n= 280), and high (n=122) resiliency groups according to the BRS. ANOVA was conducted to compare initial concussion symptoms across resiliency groups.
Results
Subjects with low resiliency reported a greater number of symptoms (M=12.96, SD=6.79) than those with high resiliency (M=9.47, SD=6.52; p<.005) and a higher level of symptoms (M=34.73, SD=25.90 vs M=25.11 SD=24.72; p<.02). Subjects with low resiliency also reported higher levels of emotional symptoms (Irritability, Sadness, Nervousness, and Feeling More Emotional) than those with average and high resiliency.
Conclusion
Our findings suggest that low resiliency may be associated with greater symptoms following SRC. For emotional symptoms, resiliency level (low, average, high) showed a linear relationship with symptom level. However, the potential relationship between resiliency and recovery or persistence of symptoms over time remains a question.
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Presley C, Tarkenton T, Meredith-Duliba T, Sabo T, Miller S, Bell K, Batjer H, Cullum CM. The Role of Premorbid Psychiatric History and Current Mood Ratings on Self-Reported Concussion Symptom Severity. Arch Clin Neuropsychol 2019. [DOI: 10.1093/arclin/acz026.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Purpose
Psychiatric history is known to be relevant to concussion outcomes, although less is known about the role of such factors or current mood ratings in adolescents. The aim of this study was to assess the role of premorbid psychiatric history (PPH) and current mood ratings (CMR) on overall sports-related concussion (SRC) symptomology and cognitive outcomes in adolescent and young adult athletes.
Methods
Participants age 12–25 years (M=14.8) diagnosed with SRC (n=560) were evaluated within 14 days of injury as part of the North Texas Concussion Registry (ConTex) using the Patient Health Questionnaire-8 Items (PHQ-8), General Anxiety Disorder-7 Item Scale (GAD-7), and ImPACT. Subjects were dichotomized into those with (PPH+) and without (PPH-) pre-existing reported psychiatric diagnoses, and CMR groups were determined by normal vs. elevated scores on the GAD-7 and PHQ-8. T-tests were used to compare groups.
Results
Significant differences in total symptom severity scores were found between both PPH (p=.01) and CMR (p<.001) groupings. PPH+ (n=27) reported significantly higher symptom scores (M=31.6) than PPH- subjects (n=316, M=20.9). Additionally, those reporting elevated CMR endorsed 2.3x higher symptom severity scores (n=48, M=42.1 vs. n=276, M=18.2). Among ImPACT cognitive scores, only Visual Memory differed between CMR groups (p=.047).
Conclusion
Findings suggest that PPH and elevated CMR are associated with greater self-reported symptom severity in adolescent SRC, but have little relationship to cognitive outcomes as assessed by ImPACT. Further research is needed to understand the interaction between PPH, CMR, and SRC recovery across the age spectrum.
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Tubić B, Marković B, Vladimirov S, Savić S, Poljarević J, Sabo T. A new model to determine lipophilicity of 1,2-ethanediamine- N,N'-di-2-(3-cyclohexyl)propanoic acid and 1,3-propanediamine- N,N'-di-2-(3-cyclohexyl)propanoic acid derivatives with antiproliferative activity by combining shake flask procedure and UHPLC-MS method. Pharmazie 2018; 72:317-323. [PMID: 29442018 DOI: 10.1619/ph.2017.6208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Fourteen compounds representing ester derivatives of (S,S)-1,2-ethanediamine-N,N'-di-2-(3-cyclohexyl) propanoic and (S,S)-1,3-propanediamine-N,N'-di-2-(3-cyclohexyl)propanoic acids, expressing antiproliferative activity in vitro were examined. The objective of this study was to determinate their lipophilicity data, and also to ensure a mathematical model for prediction lipophilicity data of potential in vivo metabolites and new derivatives of (S,S)-1,2-ethanediamine-N,N'-di-2-(3-cyclohexyl)propanoic acid, based on chromatographic parameters. Experimentally, lipophilicity data were obtained by a traditional shake flask procedure and an ultra-high performance liquid chromatographic tandem mass spectrometry (UHPLC-MS) method. A correlation between the partition coefficient n-octanol/water (logD7,4) and chromatographic data (CHI, 0), and also, between logD7,4 and retention time was investigated. A very good correlation (r2=0.8969) was found between lipophilicity parameters 0 and logD7,4 obtained using UHPLC-MS and shake flask methods: logD7,4 = (0.11±0.01)×0 + (1.25±0.20)×Nc - (9.19±1.18); statistical parameter F=47.84; significance of F = 3.74×10-6, Nc=number of C atoms between two amino groups (Nc=2 for 1,2-ethanediamine derivatives and Nc=3 for 1,3-propanediamine derivatives). The model predictivity power was determined by cross validation leave one out (LOO) technique, and expressed by the term Q2, was 0.89. The developed model has good predictivity power for prediction lipophilicity data of potential in vivo metabolites of the investigated compounds, such as novel 1,2-ethanediamine and 1,3-propanediamine N,N'-di-2-(3-cyclohexyl)propanoic acid derivatives. Also, the lipophilicity data obtained in the present study correlated with the antiproliferative activity of the investigated substances shown previously in in vitro studies.
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Jurisevic M, Arsenijevic A, Pantic J, Gajovic N, Milovanovic J, Milovanovic M, Poljarevic J, Sabo T, Vojvodic D, Radosavljevic GD, Arsenijevic N. The organic ester O,O'-diethyl-( S,S)-ethylenediamine- N,N'-di-2-(3-cyclohexyl)propanoate dihydrochloride attenuates murine breast cancer growth and metastasis. Oncotarget 2018; 9:28195-28212. [PMID: 29963272 PMCID: PMC6021340 DOI: 10.18632/oncotarget.25610] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 05/24/2018] [Indexed: 01/05/2023] Open
Abstract
Pharmacological treatment of cancer is mostly limited by drug-toxicity and resistance. It has been noticed that new organic ester ligand, O,O’-diethyl-(S,S)-ethylenediamine-N,N’-di-2-(3-cyclohexyl)propanoate dihydrochloride (named DE-EDCP) showed effective cytotoxic capacities against several human and mouse cancer cell lines. However, its effects on tumor growth and metastasis are unexplored. The aim of present study was to examine the ability of DE-EDCP to inhibit 4T1 murine breast cancer growth and progression and to explore possible molecular mechanisms. DE-EDCP exhibited significant tumoricidal activity on human and murine breast cancer cell lines. Further, marked reduction of murine breast cancer growth and progression by DE-EDCP was shown. DE-EDCP exhibits fewer side-effects compared to cisplatin as a conventional chemotherapeutic. Results obtained from in vivo and in vitro experiments indicate that DE-EDCP induces apoptosis and inhibits proliferation of 4T1 cells. DE-EDCP increases percentage of 4T1 cells in late apoptosis, expression of pro-apoptotic Bax and caspase-3, while decreases expression of anti-apoptotic Bcl-2. DE-EDCP treatment increased the percentage of TUNEL-positive nuclei and reduced Ki-67 expression in breast cancer tissue. DE-EDCP decreased expression of cyclin D3 and Ki-67, increased expression of cyclin-dependent kinase inhibitors p16, p21 and p27 and arrested 4T1 cells in G0/G1 cell cycle phase. Expression of STAT3 and downstream regulated molecules, NANOG and SOX2, was reduced in 4T1 cells after DE-EDCP treatment. In conclusion, DE-EDCP impairs breast cancer growth and progression by triggering cancer cell death and inhibition of cancer cell proliferation. DE-EDCP might be of interest in the development of the new anticancer agent.
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Affiliation(s)
- Milena Jurisevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.,Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Aleksandar Arsenijevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Jelena Pantic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Nevena Gajovic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Jelena Milovanovic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia.,Department of Histology and Embryology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Marija Milovanovic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | | | - Tibor Sabo
- Faculty of Chemistry, University of Belgrade, Belgrade, Serbia
| | - Danilo Vojvodic
- Institute of Medical Research, Faculty of Medicine, Military Medical Academy, Belgrade, Serbia
| | - Gordana D Radosavljevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - Nebojsa Arsenijevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
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Smigic J, Stojic I, Zivkovic V, Srejovic I, Nikolic T, Jeremic J, Sabo T, Jakovljevic V. The Effects of Chronic Administration of Cisplatin on Oxidative Stress in the Isolated Rat Heart. Serbian Journal of Experimental and Clinical Research 2018. [DOI: 10.1515/sjecr-2017-0003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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
Taken into consideration that molecular and cellular mechanisms involved in cardiotoxicity are still not clear the aim of this study was to compare the production of oxidative stress parameters in the isolated rat heart between animals chronically treated with cisplatin and saline. The hearts of male Wistar albino rats (n = 24, 12 per group, age 8 weeks, body mass 250±50 g) were excised and perfused according to the Langendorff technique at gradually increased coronary perfusion pressures (40-120 cm H2O). We followed the production of superoxide anion radicals, hydrogen peroxide, and nitrites and also index of lipid peroxidation during the changes of coronary perfusion pressure (CPP) (from 40 to 120 cm H2O) in coronary venous effluent. Modifications CPP were performed in order to determined if oxidative stress is involved in coronary endothelium response in conditions of hypoxia (lower than 60 cm H2O) and hyperoxia (higher than 80 cm H2O).
Based on the results of this research we can conclude that with enhancement of CPP the values of oxidative stress statistically increased. However, this increment is more prominent in control group as a result of preserved endothelium and its more powerful response to hyperoxia. On the other hand, damaged endothelium of cisplatin-treated animals had weaker response to hyperoxia, and also lower antioxidant capacity.
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Affiliation(s)
- Jelena Smigic
- Department of Physiology, Faculty of Medical Sciences , University of Kragujevac , Serbia
| | - Isidora Stojic
- Department of Pharmacy, Faculty of Medical Sciences , University of Kragujevac , Serbia
| | - Vladimir Zivkovic
- Department of Physiology, Faculty of Medical Sciences , University of Kragujevac , Serbia
| | - Ivan Srejovic
- Department of Physiology, Faculty of Medical Sciences , University of Kragujevac , Serbia
| | - Tamara Nikolic
- Department of Pharmacy, Faculty of Medical Sciences , University of Kragujevac , Serbia
| | - Jovana Jeremic
- Department of Pharmacy, Faculty of Medical Sciences , University of Kragujevac , Serbia
| | - Tibor Sabo
- Department of General and Inorganic Chemistry, Faculty of Chemistry , University of Belgrade , Serbia
| | - Vladimir Jakovljevic
- Department of Physiology, Faculty of Medical Sciences , University of Kragujevac , Serbia
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Smigic J, Stojic I, Zivkovic V, Srejovic I, Nikolic T, Jeremic J, Sabo T, Jakovljevic V. The Effects of Chronic Administration of Cisplatin on Oxidative Stress in the Isolated Rat Heart. Serbian Journal of Experimental and Clinical Research 2017. [DOI: 10.1515/sjecr.2017-0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
AbstractTaken into consideration that molecular and cellular mechanisms involved in cardiotoxicity are still not clear the aim of this study was to compare the production of oxidative stress parameters in the isolated rat heart between animals chronically treated with cisplatin and saline. Th e hearts of male Wistar albino rats (n = 24, 12 per group, age 8 weeks, body mass 250±50 g) were excised and perfused according to the Langendorff technique at gradually increased coronary perfusion pressures (40-120 cmH2O). We followed the production of superoxide anion radicals, hydrogen peroxide, and nitrites and also index of lipid peroxidation during the changes of coronary perfusion pressure (CPP) (from 40 to 120 cm H2O) in coronary venous effluent. Modifications CPP were performed in order to determined if oxidative stress is involved in coronary endothelium response in conditions of hypoxia (lower than 60 cm H2O) and hyperoxia (higher than 80 cm H2O). Based on the results of this research we can conclude that with enhancement of CPP the values of oxidative stress statistically increased. However, this increment is more prominent in control group as a result of preserved endothelium and its more powerful response to hyperoxia. On the other hand, damaged endothelium of cisplatin-treated animals had weaker response to hyperoxia, and also lower antioxidant capacity.
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Affiliation(s)
- Jelena Smigic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac , Serbia
| | - Isidora Stojic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac , Serbia
| | - Vladimir Zivkovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac , Serbia
| | - Ivan Srejovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac , Serbia
| | - Tamara Nikolic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac , Serbia
| | - Jovana Jeremic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac , Serbia
| | - Tibor Sabo
- Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Belgrade, Belgrade , Serbia
| | - Vladimir Jakovljevic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac , Serbia
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Gradiški I, Bilić P, Sabo T, Vilibić M. Tracking Insomnia Seasonal Variations Through Consumption of Hypnotics. Eur Psychiatry 2017. [DOI: 10.1016/j.eurpsy.2017.02.134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
IntroductionLight-stimulated release of melanopsin suppresses the nocturnal production of melatonin and is sending signals to multiple brain areas, including hypothalamic suprachiasmatic nuclei and thus controlling the release of the pineal hormone melatonin and therefore control the circadian rhythm. Consumption of sedatives and hypnotics was used as an indirect measure of seasonal variations in sleep disturbances among inpatients at University Psychiatric Hospital Vrapče.MethodsRetrograde record analysis was performed from 1st January to 31st December 2012 on commonly used hypnotics and sedatives: zolpidem, nitrazepam, flurazepam, and midazolam.ResultsThe lowest consumption of hypnotics was recorded in the months of November, August and September while the highest consumption was recorded in January, December and March which can be seen in Fig. 1. Although there were differences in the monthly prescription of hypnotics, when it comes to seasonal patterns, there are no statistically significant differences.ConclusionsThere is no significant difference between the consumption of hypnotics in the observed seasons although the consumption of hypnotics is higher in the months with shorter daylight. This study attempted to correlate exposure to light and insomnia through the prescription of hypnotics and it is possible there are other important variables not included in this study.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Jurisevic M, Radosavljevic G, Arsenijevic A, Milovanovic M, Gajovic N, Djordjevic D, Milovanovic J, Stojanovic B, Ilic A, Sabo T, Kanjevac T. Platinum Complexes with Edda (Ethylenediamine -N, N - Diacetate) Ligands as Potential Anticancer Agents. Serbian Journal of Experimental and Clinical Research 2016. [DOI: 10.1515/sjecr-2016-0042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Abstract
The design of platinum based drugs is not a new field of interest. Platinum complexes are widely used as anticancer agents and currently, approximately 30 platinum(II) and platinum(IV) entered into some of the phases of clinical trials. A special place in today’s research belongs to platinum complexes with diammine ligands. A large number of edda (ethylenediamine- N, N’-diacetate)-type ligands and their corresponding metal complexes has been successfully synthesized. This article summarizes recent progress in research on edda-type-platinum complexes. Some of these agents achieves better effect compared to the gold standard (cisplatin). It has been shown that there is a possible relationship between the length of the ligand ester group carbon chain and its cytotoxic effect. In most cases the longer the ester chain is the greater is the antitumor activity. Of particular interest are the noticeable effects of some new platinum compound with edda-type ligand on cell lines that are known to have a high level of cisplatin-resistance. Exanimate complexes appear to have a different mode of mechanism of action compared with cisplatin which includes apoptotic and necrotic cell death. There are indications that further investigations of these compounds may be very useful in overcoming the problems associated global cancer statistic.
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Affiliation(s)
- Milena Jurisevic
- The Faculty of Medical Sciences, University of Kragujevac, Moravska 4, 34000 Kragujevac, Serbia
| | - Gordana Radosavljevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Aleksandar Arsenijevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Marija Milovanovic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Nevena Gajovic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Dragana Djordjevic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Jelena Milovanovic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Serbia Serbia
- Department for Histology, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Bojana Stojanovic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Serbia Serbia
- Department for Pathophysiology, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Aleksandar Ilic
- Center for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Serbia
| | - Tibor Sabo
- Faculty of Chemistry, University of Belgrade, Serbia
| | - Tatjana Kanjevac
- Department for Preventive and Paediatric Dentistry, Faculty of Medical Sciences, University of Kragujevac, Serbia
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Mihajlovic-Lalic L, Damjanovic L, Sumar-Ristovic M, Savic A, Sabo T, Dondur V, Grguric-Sipka S. Cytotoxic Pt(IV) and Ru(II) complexes containing a biologically relevant edda-type ligand: A comparative study of their thermal properties. J Serb Chem Soc 2016. [DOI: 10.2298/jsc160320059m] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The thermal behaviour of a Pt(IV) and a Ru(II) complex coordinated to
O,O'-di-n-butyl-(S,S)-ethylenediamine-N,N'-di-2-(3-cyclohexyl)propanoate has
been investigated using thermogravimetry (TG) and differential scanning
calorimetry (DSC). The study included investigation of the thermal
decomposition of these complexes in the temperature range of 30 to 590?C and
evaluation of activation energy for the first decomposition steps. For both
metal complexes, broad DSC peaks indicated complex thermal transformation
processes. The two-step decomposition of the Pt(IV) complex started at 175
and ended at about 418?C, leaving elemental platinum as a final residue. On
the other hand, the Ru(II) analogue decomposed in three stages. Thermal
degradation was evident beginning at 144?C and suggested the decomposition of
a coordinated ligand as dominant process. For this complex, the proposed
final residue was RuO2. Kinetic parameters for the first decomposition step
were obtained by means of multi-heating rates method, in this case the
Kissinger-Akahira-Sunose (KAS) method. The mean activation energy calculated
for 0.2 < ? < 0.8 were 122.0 kJ mol?1 for the Pt(IV) and 118.9 kJ mol?1 for
the Ru(II) complex and decreased constantly, characteristic of a multi-step
process.
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Misirlic Dencic S, Poljarevic J, Vilimanovich U, Bogdanovic A, Isakovic AJ, Kravic Stevovic T, Dulovic M, Zogovic N, Isakovic AM, Grguric-Sipka S, Bumbasirevic V, Sabo T, Trajkovic V, Markovic I. Cyclohexyl Analogues of Ethylenediamine Dipropanoic Acid Induce Caspase-Independent Mitochondrial Apoptosis in Human Leukemic Cells. Chem Res Toxicol 2012; 25:931-9. [DOI: 10.1021/tx3000329] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Sonja Misirlic Dencic
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | | | - Urosh Vilimanovich
- Institute of Histology and Embryology,
Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Andrija Bogdanovic
- Clinic
of Hematology, Clinical Center of Serbia, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Aleksandra J. Isakovic
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Tamara Kravic Stevovic
- Institute of Histology and Embryology,
Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Marija Dulovic
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Nevena Zogovic
- Institute for Biological Research
“Sinisa Stankovic”, University of Belgrade, Belgrade, Serbia
| | - Andjelka M. Isakovic
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | | | - Vladimir Bumbasirevic
- Institute of Histology and Embryology,
Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Tibor Sabo
- Faculty of Chemistry, University of Belgrade, Belgrade, Serbia,
| | - Vladimir Trajkovic
- Institute
of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Ivanka Markovic
- Institute of Medical and Clinical Biochemistry, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
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14
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KaluĐerović G, Bogdanović G, Sabo T. Synthesis and Crystal Structure of trans-Dichloro(Ethylenediamine- -N,N′-DI-3-Propionato)Platinum(IV) Monohydrate. J COORD CHEM 2010. [DOI: 10.1080/0095897022000001566] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Goran KaluĐerović
- a Faculty of Chemistry , University of Belgrade , P.O. Box 158. Studentski trg 16, Belgrade , 11001 , Yugoslavia
| | - Goran Bogdanović
- b Laboratory of Theoretical Physics and Condensed Matter , VINČA Institute of Nuclear Sciences , P.O. Box 522, Belgrade , 11001 , Yugoslavia
| | - Tibor Sabo
- a Faculty of Chemistry , University of Belgrade , P.O. Box 158. Studentski trg 16, Belgrade , 11001 , Yugoslavia
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15
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Xu XY, Zheng T, Ma WX, Zhang MX, Liu QL, Grguric S, Dinovic V, Kaluderovic G, Sabo T. Synthesis, Crystal Structure and Properties of a 4,4′-Bipyridine Bridged Trigonal-Bipyramidal Copper Homobinuclear Complex with Tris(2-Aminoethyl)amine. J COORD CHEM 2010. [DOI: 10.1080/00958970290027589] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Xing-You Xu
- a Department of Chemical Engineering , Huihai Institute of Technology , Liangyungang , Jiangsu , 222005 , P.R. China
| | - Tao Zheng
- a Department of Chemical Engineering , Huihai Institute of Technology , Liangyungang , Jiangsu , 222005 , P.R. China
| | - Wei-Xing Ma
- a Department of Chemical Engineering , Huihai Institute of Technology , Liangyungang , Jiangsu , 222005 , P.R. China
| | - Ming-Xing Zhang
- a Department of Chemical Engineering , Huihai Institute of Technology , Liangyungang , Jiangsu , 222005 , P.R. China
| | - Qing-Liang Liu
- b Department of Chemistry , University of Science and Technology of China , Heifei , Anhui , 230026 , P.R. China
| | - Sanja Grguric
- c Faculty of Chemistry , University of Belgrade , Belgrade , P.O. Box 158 , 11000 , Yugoslavia
| | - Vesna Dinovic
- c Faculty of Chemistry , University of Belgrade , Belgrade , P.O. Box 158 , 11000 , Yugoslavia
| | - Goran Kaluderovic
- c Faculty of Chemistry , University of Belgrade , Belgrade , P.O. Box 158 , 11000 , Yugoslavia
| | - Tibor Sabo
- c Faculty of Chemistry , University of Belgrade , Belgrade , P.O. Box 158 , 11000 , Yugoslavia
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16
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Radoičić A, Majstorović H, Sabo T, Tešić Ž, Milojković-Opsenica D. Hydrophilic-interaction planar chromatography of some water-soluble Co(III) complexes on different adsorbents. JPC-J PLANAR CHROMAT 2009. [DOI: 10.1556/jpc.22.2009.4.3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Grguric-Sipka S, Alshtewi A, Jeremic D, Kaludjerovic G, Gómez-Ruiz S, Zizak Z, Juranic Z, Sabo T. Synthesis, structural characterization and cytotoxic activity of two new organoruthenium(II) complexes. J Serb Chem Soc 2008. [DOI: 10.2298/jsc0806619g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Two new p-cymene ruthenium(II) complexes containing as additional ligands N-methylpiperazine ([(?6-p-cymene)RuCl2(CH3NH(CH2)4NH)]PF6, complex 1) or vitamin K3-thiosemicarbazone ([(?6-p-cymene)RuCl2(K3tsc)], complex 2) were synthesized starting from [(?6-p-cymene)2RuCl2]2 and the corresponding ligand. The complexes were characterized by elemental analysis, IR, electronic absorption and NMR spectroscopy. The X-ray crystal structure determination of complex 1 revealed ?piano-stool? geometry. The differences in the cytotoxic activity of the two complexes are discussed in terms of the ligand present.
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Affiliation(s)
| | | | | | - Goran Kaludjerovic
- Institut za hemiju, tehnologiju i metalurgiju - Centar za hemiju, Beograd
| | - Santiago Gómez-Ruiz
- Departamento de Química Inorgánica y Analítica, E.S.C.E.T., Universidad Rey Juan Carlos, Móstoles, Madrid, Spain
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Mandic-Gajic G, Gajic P, Spiric Z, Samardzic R, Sabo T, Jovic Z. Cognitive impairment expressed in drawings of healthy alcoholics serves as diagnostic and therapeutical instrument. Eur Psychiatry 2007. [DOI: 10.1016/j.eurpsy.2007.01.636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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19
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Marković M, Knezević N, Momcilović M, Grgurić-Sipka S, Harhaji L, Trajković V, Mostarica Stojković M, Sabo T, Miljković D. [Pt(HPxSC)Cl3], a novel platinum(IV) compound with anticancer properties. Eur J Pharmacol 2005; 517:28-34. [PMID: 15970285 DOI: 10.1016/j.ejphar.2005.05.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2004] [Revised: 05/11/2005] [Accepted: 05/24/2005] [Indexed: 10/25/2022]
Abstract
There has been a continuing effort for the discovery of novel platinum(IV)-based antitumor compounds with better therapeutic performances than cisplatin. In the present work, the anticancer action of recently synthesized Pt(IV)-based complex [Pt(HPxSC)Cl(3)] was investigated using rat and human astrocytoma cell lines C6 and U251. [Pt(HPxSC)Cl(3)] markedly reduced the number of cultured astrocytoma cells (IC(50), 80 microM), as determined by crystal violet assay. The Pt(IV) complex induced apoptotic death of tumor cells, as flow cytometry analysis of the propidium iodide-stained cellular DNA revealed approx. 30% of hypodiploid cells in [Pt(HPxSC)Cl(3)]-treated astrocytoma cell cultures. On the other hand, [Pt(HPxSC)Cl(3)] at 200 microM did not affect the viability of rat primary astrocytes, unlike the established anticancer drug cisplatin, which displayed high toxicity toward both astrocytoma cells (IC(50), 15 microM) and primary astrocytes (IC(50), 20 microM). Moreover, [Pt(HPxSC)Cl(3)] at 100 microM did not interfere with the ability of rat peritoneal macrophages to produce important antitumor molecules nitric oxide and tumor necrosis factor-alpha. Finally, we assessed the ability of [Pt(HPxSC)Cl(3)] to restrain growth of some bacterial and yeast strains, but it showed rather limited antimicrobial activity.
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Affiliation(s)
- Milos Marković
- Institute of Microbiology and Immunology, School of Medicine, University of Belgrade, Dr. Subotica 1, 11000 Belgrade, Serbia and Montenegro
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Djinović V, Momcilović M, Grgurić-Sipka S, Trajković V, Mostarica Stojković M, Miljković D, Sabo T. Novel ruthenium complex K2[Ru(dmgly)Cl4]·2H2O is toxic to C6 astrocytoma cell line, but not to primary rat astrocytes. J Inorg Biochem 2004; 98:2168-73. [PMID: 15541507 DOI: 10.1016/j.jinorgbio.2004.10.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2004] [Revised: 10/01/2004] [Accepted: 10/05/2004] [Indexed: 11/24/2022]
Abstract
A novel class of ruthenium (III) complexes of formulas K[Ru(sar)2Cl2].12H2O and K2[Ru(dmgly)Cl4].2H2O, containing bidentate chelates N-methylglycine (sarcosine, sar) or N,N-dimethylglycine (dmgly) and additional chloro ligands were synthesized. The complexes have been obtained by direct reaction of ruthenium(III) chloride with corresponding bidentate ligand followed by addition of base (KOH). These new complexes were characterized by elemental analysis, IR and electronic absorption spectroscopy. As astrocytomas, the most common of all brain tumors, are still very difficult to treat, we examined the influence of newly synthesized ruthenium-based complexes, as well as the earlier synthesized analogue platinum(IV) complexes [Pt(dmgly)2Cl2], [Pt(sar)2Br2] and [Pt(dmgly)2Br2], on rat astrocytoma C6 cells in vitro. Among these complexes only K2[Ru(dmgly)Cl4].2H2O and [Pt(dmgly)2Br2] markedly inhibited the viability of non-confluent C6 cells. Furthermore, only complex K2[Ru(dmgly)Cl4].2H2O was able to reduce viability in confluent C6 cultures. Importantly, this complex was not toxic to primary rat astrocytes or macrophages. Having in mind that appropriate chemotherapy should be effective against tumor cells without harming normal tissues, complex K2[Ru(dmgly)Cl4].2H2O could be a promising agent for developing therapeutics against astrocytomas.
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Affiliation(s)
- Vesna Djinović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia and Montenegro
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Sabo T, Lomnitski L, Nyska A, Beni S, Maronpot RR, Shohami E, Roses AD, Michaelson DM. Susceptibility of transgenic mice expressing human apolipoprotein E to closed head injury: the allele E3 is neuroprotective whereas E4 increases fatalities. Neuroscience 2001; 101:879-84. [PMID: 11113336 DOI: 10.1016/s0306-4522(00)00438-3] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Apolipoprotein E, the major brain lipid-binding protein, is expressed in humans as three common isoforms (E2, E3 and E4). Previous studies revealed that the allele apolipoprotein E4 is a major genetic risk factor of Alzheimer's disease and that traumatic brain injury is associated with increased risk for developing this disease. Furthermore, it has been suggested that the effects of traumatic head injury and apolipoprotein E4 in Alzheimer's disease are synergistic. To test the hypothesis that the apolipoprotein E genotype affects susceptibility to brain injury, we subjected transgenic mice, expressing either human apolipoprotein E3 or human apolipoprotein E4 on a null mouse apolipoprotein E background and apolipoprotein E-deficient knockouts, to closed head injury and compared mortality, neurological recovery and the extent of brain damage of the survivors. More than 50% of the transgenic mice expressing human apolipoprotein E4 died following closed head injury, whereas only half as many of the transgenic mice expressing human apolipoprotein E3, and of the control and apolipoprotein E-deficient mice died during this period (P<0.02). A neurological severity score used for clinical assessment of the surviving mice up to 11 days after closed head injury revealed that the four mouse groups displayed similar severity of damage at 1h following injury. At three and 11 days post-injury, however, the neurological severity scores of the transgenic mice expressing human apolipoprotein E3 were significantly lower than those of the other three groups whose scores were similar, indicating better recovery of the transgenic mice expressing human apolipoprotein E3. Histopathological examination of the mice performed 11 days post-injury revealed, consistent with the above neurological results, that the size of the damaged brain area of the transgenic mice expressing human apolipoprotein E3 was smaller than that of the other head-injured groups. These findings show that transgenic mice expressing human apolipoprotein E4 are more susceptible than those expressing apolipoprotein E3 to closed head injury. We suggest that this effect is due to both a protective effect of apolipoprotein E3 and an apolipoprotein E4-related pathological function.
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Affiliation(s)
- T Sabo
- Department of Neurobiochemistry, George S. Wise Faculty of Life Sciences, Tel Aviv University, 69978, Ramat Aviv, Israel
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Chapman S, Sabo T, Roses AD, Michaelson DM. Reversal of presynaptic deficits of apolipoprotein E-deficient mice in human apolipoprotein E transgenic mice. Neuroscience 2000; 97:419-24. [PMID: 10828524 DOI: 10.1016/s0306-4522(00)00087-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Apolipoprotein E genotype is an important risk factor of Alzheimer's disease, which is associated with the degeneration of distinct brain neuronal systems. In the present study we employed apolipoprotein E-deficient mice and human apolipoprotein E3 and apolipoprotein E4 transgenic mice on a null mouse apolipoprotein E background, to examine the extent to which distinct brain neuronal systems are affected by apolipoprotein E and the isoform specificity of this effect. This was pursued by histological and autoradiographic measurements utilizing neuron specific presynaptic markers. The results thus obtained revealed significant reductions in the levels of brain cholinergic and noradrenergic nerve terminals in young apolipoprotein E-deficient mice and no changes in brain dopaminergic nerve terminals. These cholinergic and noradrenergic presynaptic derangements were ameliorated similarly in human apolipoprotein E3 and apolipoprotein E4 transgenic mice. In the case of the cholinergic system, this resulted in complete reversal of the presynaptic deficits, whereas in the case of the noradrenergic neurons the amelioration was partial. These findings suggest that brain cholinergic and noradrenergic neurons are markedly more dependent on brain apolipoprotein E than brain dopaminergic neurons and that the isoform specificity of these effects is not apparent at a young age under non-challenged conditions.
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Affiliation(s)
- S Chapman
- Department of Neurobiochemistry, George S. Wise Faculty of Life Sciences, Tel Aviv University, 69978, Ramat Aviv, Israel
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Prelesnik B, Andjelković K, Markovic Z, Sabo T, Trifunovic S. Potassium 3-Dithiocarboxy-3-aza-5-aminopentanoate Dihydrate. Acta Crystallogr C 1997. [DOI: 10.1107/s0108270197001650] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Abstract
Cleavage of the human platelet thrombin receptor by thrombin exposes a new N-terminal which acts as a putative tethered ligand. A synthetic peptide--"SFLL" (SFLLRNPNDKYEPF), corresponding to the new N-terminal region, activates and induces platelet aggregation and serotonin secretion. We have found that the pentapeptide--SFLLR is the minimal peptide length which retains full activity in inducing [14C]serotonin secretion. Structure-activity relationship studies were performed on this pentameric peptide. Systematic replacement of all amino acids with L-Ala indicated the importance of F-2, L-3 and R-5 for activity. Further studies demonstrated that the positive charge at the N-terminus, but not at the C-terminus of the pentapeptide, is crucial for activity.
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Affiliation(s)
- T Sabo
- Israel Institute for Biological Research, Ness-Ziona
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Ariel N, Lehrer S, Elhanaty E, Sabo T, Brodt P, Lachmi B, Katz D, Levin R, Grosfeld H, Velan B. Serologically defined linear epitopes in the E2 envelope glycoprotein of Semliki Forest virus. Arch Virol 1990; 113:99-106. [PMID: 1696808 DOI: 10.1007/bf01318358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A set of 41 overlapping peptides, representing the complete sequence of SFV-E2 protein were synthesized and analyzed in the ELISA test against murine anti-SFV sera. No single peptide was recognized by all antisera. Eight peptides were found to be highly reactive with hyperimmune anti-SFV sera. Six out of the eight peptide sequences coincide with the most hydrophilic regions of SFV-E2. Out of these, four peptides (amino acid positions 16-35, 61-80, 166-185, 286-305) that contain the least number of alphavirus conserved residues were selected. This panel constitutes the minimal number of peptides necessary and sufficient for specific recognition of hyperimmune mouse anti-SFV sera.
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Affiliation(s)
- N Ariel
- Department of Biochemistry, Israel Institute for Biological Research, Ness Ziona
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Vencel P, Langos J, Jalŭvka J, Sabo T. [Nickel tetracarbonyl poisoning]. Voen Med Zh 1971; 8:60-3. [PMID: 5115974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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