11 results on '"Petelin, Z."'
Search Results
2. Book of abstracts, p.106, 14th European Congress of Neurosurgery, October 9-14, 2011
- Author
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Hajnšek S, Petelin Z, Mrak G, Bujan Kovač A, Nanković S, Desnica A, Paladino J.
- Subjects
Book of abstracts ,p.106 ,14th European Congress of Neurosurgery ,October 9-14 ,2011 - Abstract
Book of abstracts, p.106, 14th European Congress of Neurosurgery, October 9-14, 2011
- Published
- 2011
3. Apoptosis of peripheral blood lymphocytes in patients with relapsing-remitting multiple sclerosis
- Author
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Petelin, Z., Brinar, V., Petravic, D., Zurak, N., Klara Dubravcic, and Batinic, D.
- Subjects
apoptosis ,CD95/Fas ,lymphocytes ,relapsing-remitting multiple sclerosis - Abstract
Recent data indicate that the apoptotic process, mediated by the CD95/Fas cell surface receptor, may be impaired in activated lymphocytes of patients with relapsing-remitting multiple sclerosis (RRMS). The aim of this study was to analyse the expression of CD95/Fas on peripheral blood (PB) CD4+ and CD8+ T lymphocytes and apoptosis of PB lymphocytes in RRMS patients in the relapse of the disease, immediately before and after pulse corticosteroid therapy (PCT), and in healthy individuals. The study included 27 patients (23 F, 4 M) with RRMS diagnosed by McDonald's criteria and 31 healthy controls (25 F, 6 M). Mean age of the patients was 36.85 +/- 7.52 years, mean duration of the disease 4.14 +/- 4.89 years, and average EDSS scale 3.24 +/- 1.18. Mean age of the controls was 36.54 +/- 10.72 years. The proportions of CD95+ T lymphocyte subsets were analysed by the use of monoclonal antibodies (anti-CD4-PE/Cy5, anti-CD8-FITC and anti-CD95-PE, DAKO) and flow cytometry (FACSscan cytometer and CellQuest software, Becton Dickinson). Apoptosis of lymphocytes was analysed by the use of annexin-V-FITC and PI labeling (Becton Dickinson), as well as flow cytometry. For statistical analysis nonparametric Mann-Whitney test for independent samples and Wilcoxon test for dependent samples were used. Results were presented as median (M) and range. The p values < 0.05 were considered as statistically significant. The proportion of CD4+CD95+ T lymphocytes was significantly higher in patients before therapy (M= 47.90 ; range 32.50 - 61.50), as compared to patients after therapy (M= 40.60 ; range 30.60 - 51.80, p< 0.01), and to controls (M= 36 ; range 30.40 - 40.10, p< 0.01). The proportion of CD8+CD95+ T lymphocytes was significantly higher in patients before therapy (M= 26 ; range 16.80 - 39.10), as compared to patients after therapy (M= 19.30 ; range 11-30, p< 0.01), and to controls (M= 19 ; range 12.30 - 25.50, p< 0.01). Apoptosis of lymphocytes was significantly lower in patients before therapy (M= 1.30 ; range 1- 4.70), as compared to patients after therapy (M= 5.60 ; range 3.10 - 48.80, p< 0.01), and to controls (M= 6.10 ; range 3.10 - 11.40, p< 0.01). Our results indirectly show that the process of apoptosis mediated by the CD95/Fas receptor is impaired in activated lymphocytes of RRMS patients. They also show that in those patients PCT influences on CD95/Fas expression on PB T lymphocytes, as well as on the lymphocyte apoptosis.
4. Factors associated with perceived stigma of epilepsy in Croatia: a study using the revised Epilepsy Stigma Scale.
- Author
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Bielen I, Friedrich L, Sruk A, Prvan MP, Hajnšek S, Petelin Z, Sušak R, Candrlić M, and Jacoby A
- Subjects
- Adolescent, Adult, Age Factors, Age of Onset, Aged, Aged, 80 and over, Computer Simulation, Croatia, Female, Humans, Male, Middle Aged, Models, Psychological, Outpatients psychology, Psychometrics, Seizures psychology, Stereotyping, Young Adult, Epilepsy psychology, Social Stigma, Surveys and Questionnaires
- Abstract
Purpose: It is believed that a large number of factors influence feelings of stigma, but their relative contribution is not yet entirely clear. Most studies to date were conducted using the Epilepsy Stigma Scale (ESS); only one used a revised version of the ESS (rESS). The following study aims to determine factors contributing to epilepsy stigma in outpatients with chronic epilepsy in Croatia, and to analyze some psychometric properties of the Croatian translation of the rESS., Methods: Alongside standard testing for validity of the scale, a simulation model of the original ESS (smESS) was created. This model, which does not include a grading Likert 0-3 scale, was compared with the rESS., Results: In total, 159 out of 298 subjects (53%) reported feeling stigmatised, with 136 (45%) mild to moderately and 23 (8%) highly. Internal consistency of the Croatian translation of the rESS was 0.887. Feelings of stigma were significantly associated with age ≤ 50 years, younger age of epilepsy onset, more than 50 seizures to date, generalized tonic-clonic seizures, and a shorter seizure-free period. Multiple stepwise regression showed number of seizures to date as a significant variable (Beta=0.246). By adapting data into the smESS significant associations with younger age and age of epilepsy onset were lost. Internal consistency of the smESS was 0.849., Conclusions: The Croatian translation of the rESS has been proved to be a suitable instrument for diagnosing epilepsy stigma. The results of our model point to the possibility that the rESS might be more sensitive than the original ESS., (Copyright © 2013 British Epilepsy Association. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2014
- Full Text
- View/download PDF
5. Vagus nerve stimulation in the treatment of patients with pharmacoresistant epilepsy: our experiences.
- Author
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Hajnsek S, Petelin Z, Poljaković Z, Mrak G, Paladino J, and Desnica A
- Subjects
- Adult, Female, Humans, Magnetic Resonance Imaging, Male, Drug Resistance, Epilepsy therapy, Vagus Nerve Stimulation
- Abstract
Vagus nerve stimulation (VNS) for the treatment of refractory partial epileptic seizures with or without secondary generalisation in patients older than 12 years was approved in Europe in 1994 and in the United States in 1997. We have studied the efficacy of VNS in patients with pharmacoresistant epilepsy hospitalized in the Neurology Department of the University Hospital Centre Zagreb. From 1997 to 2001 we have implanted VNS in 11 patients with pharmacoresistant epilepsy, who were magnetic resonance imaging (MRI) negative and from May 2007 to May 2009 in 11 patients with pharmacoresistant epilepsy, 9 of them were MRI positive, and were inoperable due to localisation of the pathomorphologic changes (ganglioglioma, hamartoma, various types of cortical dysplasia, porencephalic cysts), 2 were MR negative. In the group of MRI negative patients 1 patient had complex partial seizures (CPS), 6 patients had CPS with secondary generalisation, 2 patients had primary generalized epilepsy (PGE) including myoclonic, absence, atonic and tonic-clonic seizures, one patient had PGE and CPS, and 3 patients had Lennox-Gastaut syndrome (LGS). In the group of MRI positive patients one patient had elementary partial seizures (EPS) and CPS, two patients had EPS and CPS with secondary generalisation, one patient had CPS, 3 patients had CPS with secondary generalisation, and 2 patients had CPS with secondary generalisation as well as atonic seizures. After continuous follow-up of 11 MRI negative patients during 5 years and 2 MRI negative patients during one year there was decrease in mean-seizure frequency of 51.67%. After continuous follow-up of 9 MRI positive patients during 2 years there was decrease in mean-seizure frequency of 61.9%. The most frequent side effects were hoarseness, throat pain and cough in the "on phase" of the VNS, but they were mild and transitory. We can conclude that VNS was effective mode of therapy in our group of patients with pharmacoresistant epilepsy.
- Published
- 2011
6. Impact of partial liberalization of driver's license regulations on the driving behavior of people with epilepsy: experience from Croatia.
- Author
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Bielen I, Hajnšek S, Krmpotić P, Petelin Z, Sušak R, Sepić-Grahovac D, and Sruk A
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- Croatia, Humans, Surveys and Questionnaires, Automobile Driving legislation & jurisprudence, Automobile Driving psychology, Epilepsy psychology
- Abstract
Until 2005 Croatia had a driving ban for people with epilepsy (PWE) on antiepileptic therapy. To investigate the impact of partial liberalization of legislation, the results of polling performed in 1999 and 2009 were compared. The results revealed that in 1999, despite the driving ban, 46.9% of respondents had a driver's license, whereas in 2009, the majority of respondents with a driver's license (60.2%) fulfilled the requirement criterion of 2 years' remission. In both pollings, one-third of respondents answered that they were driving less often than other drivers. The rate of PWE who were driving was inversely proportional to the seizure rate. In 2009 a greater proportion stated that they drove motorcycles, and few PWE (<5%) declared they were driving more often than others. The inefficiency of rigid legislation and indicators of self-restraint of PWE may be arguments in favor of liberalization, but liberalization should be accompanied by appropriate education programs., (Copyright © 2011 Elsevier Inc. All rights reserved.)
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- 2011
- Full Text
- View/download PDF
7. CNS demyelination in autoimmune diseases.
- Author
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Brinar VV, Petelin Z, Brinar M, Djaković V, Zadro I, and Vranjes D
- Subjects
- Adolescent, Adult, Aged, Female, Humans, Male, Middle Aged, Autoimmune Diseases complications, Demyelinating Autoimmune Diseases, CNS etiology, Demyelinating Autoimmune Diseases, CNS pathology
- Abstract
Autoimmune diseases represent a diverse group of disorders that have generally of unknown etiology and poorly understood pathogenesis. They may be organ-specific or systemic, giving rise to overlapping syndromes; more than one autoimmune disease may occur in the same patient. Numerous case reports have documented that multiple sclerosis (MS) may be present concurrently with other autoimmune diseases, most commonly rheumatoid arthritis, autoimmune thyroid disease, type I diabetes mellitus and pernicious anemia. Case reports of disseminated encephalomyelitis (DEM) coincidental with other autoimmune diseases are rare. Many of systemic autoimmune diseases cause central nervous system (CNS) demyelination and are frequently then diagnosed as MS, whereas they often are instances of DEM, the result of vascular, granulomatous or postinfectious manifestations. We have reviewed 15 patients with autoimmune diseases and CNS demyelination in order to determine the nature of the demyelinating process.
- Published
- 2006
- Full Text
- View/download PDF
8. Level of sFas/APO 1 in serum and cerebrospinal fluid in multiple sclerosis.
- Author
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Mahovic D, Petravic D, Petelin Z, Zurak N, Horvat G, and Hajnsek S
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- Adult, Female, Humans, Male, Multiple Sclerosis blood, Multiple Sclerosis cerebrospinal fluid, fas Receptor blood, fas Receptor cerebrospinal fluid
- Abstract
The aim of the study was to measure sFas/APO 1 serum and cerebrospinal fluid (CSF) levels in patients with relapsing-remitting multiple sclerosis (MS) during relapses, as an index of inhibition of apoptosis of activated lymphocytes in eight patients with clinically definite multiple sclerosis, and 12 healthy controls. The level of serum and CSF sFas/APO 1 was determined by commercially available enzyme-linked immunosorbent assay (ELISA) kits. No significant differences were detected in the sFas/APO 1 serum level between patients and controls, but the levels in CSF was lower in the former. Our results suggest the possibility of Fas mediated apoptosis as a contributing factor in the pathogenesis of multiple sclerosis.
- Published
- 2004
- Full Text
- View/download PDF
9. Cerebral demyelination in Wegener's granulomatosis.
- Author
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Brinar VV, Cikes N, Petelin Z, Hlavati M, and Poser CM
- Subjects
- Adult, Demyelinating Diseases complications, Female, Granulomatosis with Polyangiitis complications, Humans, Magnetic Resonance Imaging, Multiple Sclerosis complications, Brain pathology, Demyelinating Diseases pathology, Granulomatosis with Polyangiitis pathology, Multiple Sclerosis pathology
- Abstract
A 38-year-old woman with a history of a granulomatous lesion of the nose, developed blurred vision, ataxic gait, and spastic tetraparesis. The presence of demyelination on the brain MRI led to the diagnosis of cerebral demyelination associated with Wegener's granulomatosis. Pulse cyclophosphamide administration resulted in some clinical of improvement of her condition. Demyelinating lesions seen in Wegener's have been ascribed to multiple sclerosis, but in this case, they are much more reminiscent of disseminated encephalomyelitis (DEM). The immunological challenge of the underlying disease, may, in the genetically susceptible person, presumably trigger the appearance of MS lesions. Wegener's granulomatosis must be considered in the differential diagnosis of MS.
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- 2004
- Full Text
- View/download PDF
10. CD95/Fas expression on peripheral blood T lymphocytes in patients with multiple sclerosis: effect of high-dose methylprednisolone therapy.
- Author
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Petelin Z, Brinar V, Petravic D, Zurak N, Dubravcic K, and Batinic D
- Subjects
- Anti-Inflammatory Agents administration & dosage, CD4 Antigens immunology, CD4 Antigens metabolism, CD8 Antigens immunology, CD8 Antigens metabolism, Dose-Response Relationship, Drug, Flow Cytometry methods, Humans, Immunophenotyping, Methylprednisolone administration & dosage, Recurrence, Remission Induction, fas Receptor blood, Anti-Inflammatory Agents therapeutic use, Methylprednisolone therapeutic use, Multiple Sclerosis blood, Multiple Sclerosis drug therapy, Multiple Sclerosis immunology, T-Lymphocytes immunology, T-Lymphocytes metabolism, fas Receptor immunology, fas Receptor metabolism
- Abstract
Recent data indicate that the apoptotic process, mediated by the CD95/Fas cell surface receptor, is impaired in activated lymphocytes of patients with relapsing-remitting multiple sclerosis. Using flow cytometric-immunophenotyping, we analyzed the expression of CD95/Fas on peripheral blood CD4+ and CD8+ T lymphocytes (PBL) in 10 MS patients in relapse, and the effect of pulse corticosteroid therapy on the apoptosis of autoreactive lymphocytes. The proportions of CD8+ and CD8+CD95+ T lymphocytes were significantly higher in MS patients in relapse before than after pulse corticosteroid therapy. Conversely, the proportions of CD4+ and CD4+CD95+ T cells were significantly lower before than after therapy, but not significantly different from healthy persons. The different expression of CD95/Fas on peripheral blood CD8+ T lymphocytes in relapsing RRMS and in healthy controls suggests a possible involvement of apoptosis in the pathogenesis of MS. Our results also show that pulse corticosteroid therapy influences the CD95/Fas expression on CD8+ and CD4+ T lymphocytes in patients with RRMS.
- Published
- 2004
- Full Text
- View/download PDF
11. Sudden onset aphasic hemiplegia: an unusual manifestation of disseminated encephalomyelitis.
- Author
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Brinar VV, Poser CM, Basic S, and Petelin Z
- Subjects
- Adolescent, Adult, Aphasia diagnosis, Demyelinating Diseases pathology, Diagnosis, Differential, Female, Hemiplegia diagnosis, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Aphasia etiology, Brain pathology, Encephalomyelitis, Acute Disseminated complications, Encephalomyelitis, Acute Disseminated diagnosis, Hemiplegia etiology
- Abstract
The association of the sudden onset of aphasia with hemiplegia, hemisenosry defect, and facial palsy, with MRI evidence of white matter lesions, requires differentiation between multiple sclerosis (MS) and acute disseminated encephalomyelitis (ADEM). We have observed eight patients with such a syndrome, all of whom were originally diagnosed as multiple sclerosis, but who, on closer examination, turned out to be instances of disseminated encephalomyelitis. The patterns of demyelination seen in T2-weighted MRI are quite different in both conditions. In two of our patients, MRI reverted to normal after the treatment; in others, the images remained unchanged. A review of the reported cases of multiple sclerosis presenting with the acute onset of aphasia, reveals that the majority of them are, in reality, instances of acute disseminated encephalomyelitis with a much better prognosis. Most of these cases are monophasic and immunomodulatory treatment is inappropriate.
- Published
- 2004
- Full Text
- View/download PDF
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