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Pantic I, Jeremic R, Dacic S, Pekovic S, Pantic S, Djelic M, Vitic Z, Brkic P, Brodski C. Gray-Level Co-Occurrence Matrix Analysis of Granule Neurons of the Hippocampal Dentate Gyrus Following Cortical Injury. Microsc Microanal 2020; 26:166-172. [PMID: 31948501 DOI: 10.1017/s143192762000001x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Traumatic brain injury (TBI) is a main cause of death and disabilities in young adults. Although learning and memory impairments are a major clinical manifestation of TBI, the consequences of TBI on the hippocampus are still not well understood. In particular, how lesions to the sensorimotor cortex damage the hippocampus, to which it is not directly connected, is still elusive. Here, we study the effects of sensorimotor cortex ablation (SCA) on the hippocampal dentate gyrus, by applying a highly sensitive gray-level co-occurrence matrix (GLCM) analysis. Using GLCM analysis of granule neurons, we discovered, in our TBI paradigm, subtle changes in granule cell (GC) morphology, including textual uniformity, contrast, and variance, which is not detected by conventional microscopy. We conclude that sensorimotor cortex trauma leads to specific changes in the hippocampus that advance our understanding of the cellular underpinnings of cognitive impairments in TBI. Moreover, we identified GLCM analysis as a highly sensitive method to detect subtle changes in the GC layers that is expected to significantly improve further studies investigating the impact of TBI on hippocampal neuropathology.
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Affiliation(s)
- Igor Pantic
- Faculty of Medicine, Institute of Medical Physiology, University of Belgrade, Visegradska 26/II, RS-11129Belgrade, Serbia
- University of Haifa, 199 Abba Hushi Blvd., Mount Carmel, Haifa, IL-3498838, Israel
| | - Rada Jeremic
- Faculty of Medicine, Institute of Medical Physiology, University of Belgrade, Visegradska 26/II, RS-11129Belgrade, Serbia
| | - Sanja Dacic
- Department for General Physiology and Biophysics, Institute of Physiology and Biochemistry "Ivan Djaja", Faculty of Biology, University of Belgrade, Studentski trg 16, 11000Belgrade, Serbia
| | - Sanja Pekovic
- Department of Neurobiology, Institute for Biological Research "Sinisa Stankovic"- National Institute of Republic of Serbia, University of Belgrade, Blvd despota Stefana 142, Belgrade, Serbia
| | - Senka Pantic
- School of Medicine, Institute of Histology and Embryology, University of Belgrade, Visegradska 26/II, RS-11129Belgrade, Serbia
| | - Marina Djelic
- Faculty of Medicine, Institute of Medical Physiology, University of Belgrade, Visegradska 26/II, RS-11129Belgrade, Serbia
| | - Zagorka Vitic
- Department of Physiology and Cell Biology, Zlotowski Center for Neuroscience, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Predrag Brkic
- Faculty of Medicine, Institute of Medical Physiology, University of Belgrade, Visegradska 26/II, RS-11129Belgrade, Serbia
| | - Claude Brodski
- Department of Physiology and Cell Biology, Zlotowski Center for Neuroscience, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
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Pantic I, Petrovic D, Paunovic J, Vucevic D, Radosavljevic T, Pantic S. Age-related reduction of chromatin fractal dimension in toluidine blue - stained hepatocytes. Mech Ageing Dev 2016; 157:30-4. [PMID: 27412950 DOI: 10.1016/j.mad.2016.07.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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: 02/16/2016] [Revised: 05/26/2016] [Accepted: 07/06/2016] [Indexed: 02/05/2023]
Abstract
In this study, we proposed a hypothesis that chromatin of mouse hepatocytes exhibits age-related reduction of fractal dimension. This hypothesis was based on previously published works demonstrating that complexity of biological systems such as tissues, decreases during the process of physiological aging. Liver tissue was obtained from 24 male mice divided into 3 age groups: 10-days-old (young, juvenile), 210-days-old (adult) and 390-days-old. The tissue was stained using a modification of toluidine blue (nucleic acid - specific) staining method. A total of 480 chromatin structures (20 for each animal) were analyzed. For each structure, the values of fractal dimension, lacunarity, textural angular second moment and inverse difference moment were calculated using ImageJ software and its plugins. The results indicated the age-related reduction in fractal dimension and increase in lacunarity (p<0.01). Fractal dimension is a potentially good indicator of age associated changes in chromatin structure. To our knowledge, this is the first study to show that fractal complexity of hepatocyte chromatin decreases during the process of physiological aging. Fractal analysis as a method could be useful in detection of small age-related changes in chromatin distribution not otherwise visible with naked eye on conventional tissue micrographs.
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Affiliation(s)
- Igor Pantic
- Laboratory for Cellular Physiology, Institute of Medical Physiology, Faculty of Medicine University of Belgrade, Visegradska 26/II, RS-11129, Belgrade, Serbia.
| | - Danica Petrovic
- Health Center Studenica, Kraljevo, Jug Bogdanova 112, RS-36000, Kraljevo, Serbia
| | - Jovana Paunovic
- Laboratory for Cellular Physiology, Institute of Medical Physiology, Faculty of Medicine University of Belgrade, Visegradska 26/II, RS-11129, Belgrade, Serbia
| | - Danijela Vucevic
- Institute of pathological physiology, School of Medicine, University of Belgrade, Dr Subotica 9, RS-11129, Belgrade, Serbia
| | - Tatjana Radosavljevic
- Institute of pathological physiology, School of Medicine, University of Belgrade, Dr Subotica 9, RS-11129, Belgrade, Serbia
| | - Senka Pantic
- Institute of Histology and Embryology, School of Medicine, University of Belgrade Visegradska 26/II, RS-11129, Belgrade, Serbia
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Stankovic M, Pantic I, De Luka SR, Puskas N, Zaletel I, Milutinovic-Smiljanic S, Pantic S, Trbovich AM. Quantification of structural changes in acute inflammation by fractal dimension, angular second moment and correlation. J Microsc 2015; 261:277-84. [PMID: 26501409 DOI: 10.1111/jmi.12330] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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: 12/27/2014] [Accepted: 09/14/2015] [Indexed: 11/28/2022]
Abstract
The aim of the study was to examine alteration and possible application of fractal dimension, angular second moment, and correlation for quantification of structural changes in acutely inflamed tissue. Acute inflammation was induced by injection of turpentine oil into the right and left hind limb muscles of mice, whereas control animals received intramuscular saline injection. After 12 h, animals were anesthetised and treated muscles collected. The tissue was stained by hematoxylin and eosin, digital micrographs produced, enabling determination of fractal dimension of the cells, angular second moment and correlation of studied tissue. Histopathological analysis showed presence of inflammatory infiltrate and tissue damage in inflammatory group, whereas tissue structure in control group was preserved, devoid of inflammatory infiltrate. Fractal dimension of the cells, angular second moment and correlation of treated tissue in inflammatory group decreased in comparison to the control group. In this study, we were first to observe and report that fractal dimension of the cells, angular second moment, and correlation were reduced in acutely inflamed tissue, indicating loss of overall complexity of the cells in the tissue, the tissue uniformity and structure regularity. Fractal dimension, angular second moment and correlation could be useful methods for quantification of structural changes in acute inflammation.
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Affiliation(s)
- Marija Stankovic
- Department of Pathophysiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Igor Pantic
- Laboratory for Cellular Physiology, Institute of Medical Physiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Silvio R De Luka
- Department of Pathophysiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Nela Puskas
- Institute of Histology and Embryology "Aleksandar Đ. Kostić", School of Medicine, University of Belgrade, Belgrade, Serbia
| | - Ivan Zaletel
- Institute of Histology and Embryology "Aleksandar Đ. Kostić", School of Medicine, University of Belgrade, Belgrade, Serbia
| | | | - Senka Pantic
- Institute of Histology and Embryology "Aleksandar Đ. Kostić", School of Medicine, University of Belgrade, Belgrade, Serbia
| | - Alexander M Trbovich
- Department of Pathophysiology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
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Pantic I, Dacic S, Brkic P, Lavrnja I, Jovanovic T, Pantic S, Pekovic S. Discriminatory ability of fractal and grey level co-occurrence matrix methods in structural analysis of hippocampus layers. J Theor Biol 2015; 370:151-6. [DOI: 10.1016/j.jtbi.2015.01.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Accepted: 01/27/2015] [Indexed: 12/18/2022]
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Pantic I, Dacic S, Brkic P, Lavrnja I, Pantic S, Jovanovic T, Pekovic S. Application of fractal and grey level co-occurrence matrix analysis in evaluation of brain corpus callosum and cingulum architecture. Microsc Microanal 2014; 20:1373-1381. [PMID: 24967845 DOI: 10.1017/s1431927614012811] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This aim of this study was to assess the discriminatory value of fractal and grey level co-occurrence matrix (GLCM) analysis methods in standard microscopy analysis of two histologically similar brain white mass regions that have different nerve fiber orientation. A total of 160 digital micrographs of thionine-stained rat brain white mass were acquired using a Pro-MicroScan DEM-200 instrument. Eighty micrographs from the anterior corpus callosum and eighty from the anterior cingulum areas of the brain were analyzed. The micrographs were evaluated using the National Institutes of Health ImageJ software and its plugins. For each micrograph, seven parameters were calculated: angular second moment, inverse difference moment, GLCM contrast, GLCM correlation, GLCM variance, fractal dimension, and lacunarity. Using the Receiver operating characteristic analysis, the highest discriminatory value was determined for inverse difference moment (IDM) (area under the receiver operating characteristic (ROC) curve equaled 0.925, and for the criterion IDM≤0.610 the sensitivity and specificity were 82.5 and 87.5%, respectively). Most of the other parameters also showed good sensitivity and specificity. The results indicate that GLCM and fractal analysis methods, when applied together in brain histology analysis, are highly capable of discriminating white mass structures that have different axonal orientation.
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Affiliation(s)
- Igor Pantic
- 1Institute of Medical Physiology,School of Medicine,University of Belgrade,Visegradska 26/II,11129,Belgrade,Serbia
| | - Sanja Dacic
- 2Institute of Physiology and Biochemistry, Faculty of Biology,University of Belgrade,Studentski trg 3,11000,Belgrade,Serbia
| | - Predrag Brkic
- 1Institute of Medical Physiology,School of Medicine,University of Belgrade,Visegradska 26/II,11129,Belgrade,Serbia
| | - Irena Lavrnja
- 3Department of Neurobiology,Institute for Biological Research "Sinisa Stankovic",University of Belgrade,Boulevard Despot Stefan 142,11060 Belgrade,Serbia
| | - Senka Pantic
- 4Institute of Histology,School of Medicine,University of Belgrade,Visegradska 26/II,11129,Belgrade,Serbia
| | - Tomislav Jovanovic
- 1Institute of Medical Physiology,School of Medicine,University of Belgrade,Visegradska 26/II,11129,Belgrade,Serbia
| | - Sanja Pekovic
- 3Department of Neurobiology,Institute for Biological Research "Sinisa Stankovic",University of Belgrade,Boulevard Despot Stefan 142,11060 Belgrade,Serbia
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Pantic I, Pantic S, Paunovic J, Perovic M. Nuclear entropy, angular second moment, variance and texture correlation of thymus cortical and medullar lymphocytes: grey level co-occurrence matrix analysis. AN ACAD BRAS CIENC 2013; 85:1063-72. [PMID: 23969846 DOI: 10.1590/s0001-37652013005000045] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Accepted: 10/11/2012] [Indexed: 02/05/2023] Open
Abstract
Grey level co-occurrence matrix analysis (GLCM) is a well-known mathematical method for quantification of cell and tissue textural properties, such as homogeneity, complexity and level of disorder. Recently, it was demonstrated that this method is capable of evaluating fine structural changes in nuclear structure that otherwise are undetectable during standard microscopy analysis. In this article, we present the results indicating that entropy, angular second moment, variance, and texture correlation of lymphocyte nuclear structure determined by GLCM method are different in thymus cortex when compared to medulla. A total of 300 thymus lymphocyte nuclei from 10 one-month-old mice were analyzed: 150 nuclei from cortex and 150 nuclei from medullar regions of thymus. Nuclear GLCM analysis was carried out using National Institutes of Health ImageJ software. For each nucleus, entropy, angular second moment, variance and texture correlation were determined. Cortical lymphocytes had significantly higher chromatin angular second moment (p < 0.001) and texture correlation (p < 0.05) compared to medullar lymphocytes. Nuclear GLCM entropy and variance of cortical lymphocytes were on the other hand significantly lower than in medullar lymphocytes (p < 0.001). These results suggest that GLCM as a method might have a certain potential in detecting discrete changes in nuclear structure associated with lymphocyte migration and maturation in thymus.
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Affiliation(s)
- Igor Pantic
- Laboratory for Cellular Physiology, School of Medicine, Institute of Medical Physiology, University of Belgrade, 11129 Belgrade, Serbia.
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Pantic I, Paunovic J, Basta-Jovanovic G, Perovic M, Pantic S, Milosevic NT. Age-related reduction of structural complexity in spleen hematopoietic tissue architecture in mice. Exp Gerontol 2013; 48:926-32. [PMID: 23834968 DOI: 10.1016/j.exger.2013.06.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2012] [Revised: 06/11/2013] [Accepted: 06/28/2013] [Indexed: 02/05/2023]
Abstract
The effects of aging on structural complexity in hematopoietic tissue are unknown. In this work, in a mouse experimental model, we report the age-related reduction of spleen hematopoietic tissue (SHT) complexity. Spleen tissue was obtained from the total of 64 male Swiss albino mice divided into 8 age groups: newborns (0 days old), 10 days, 20 days, 30 days, 120 days, 210 days, 300 and 390 days old. SHT was stained using conventional hematoxylin/eosin, and DNA-binding toluidine blue dyes. Fractal dimension as an indicator of cellular complexity, and lacunarity as indicator of tissue heterogeneity were determined based on the binarized SHT micrographs. Results indicate that fractal dimension of mice spleen hematopoietic tissue decreases with age, while lacunarity increases. These changes/trends have been detected in SHT stained both with toluidine blue and conventional hematoxylin/eosin. Fractal dimension was negatively correlated with lacunarity. The detected reduction in complexity suggests that age-related structural changes are present in mouse SHT both in general tissue architecture and progenitor cell DNA.
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Affiliation(s)
- Igor Pantic
- Laboratory for Cellular Physiology, Institute of Medical Physiology, School of Medicine, University of Belgrade, Visegradska 26/II, 11129 Belgrade, Serbia.
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Pantic I, Nesic D, Stevanovic D, Starcevic V, Pantic S, Trajkovic V. Effects of ghrelin on the structural complexity of exocrine pancreas tissue architecture. Microsc Microanal 2013; 19:553-558. [PMID: 23628379 DOI: 10.1017/s1431927613000524] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Recent studies have shown that ghrelin increases pancreatic exocrine secretion. However, the potential effects of ghrelin on the morphology of exocrine pancreas (EP) remain unknown. In this work, using fractal analysis, we demonstrate that centrally administered ghrelin increases structural complexity and tissue disorder in rat EP. The study was carried out on a total of 40 male Wistar rats divided into four groups (n = 10): ghrelin-treated animals (average age, 1.5 months), ghrelin-treated animals (8.5 months), and controls (1.5 and 8.5 months). The pancreas tissue sections were stained with hematoxylin/eosin and visualized by light microscopy. For each animal, the average values of tissue fractal dimension, lacunarity, as well as parameters of co-occurrence matrix texture, were determined using tissue digital micrographs. The results indicate that ghrelin administration increases EP fractal dimension and textural entropy, and decreases lacunarity, regardless of the age. To our knowledge, this is the first study to investigate the effects of ghrelin on the morphological properties of pancreatic tissue, and also the first to apply fractal and textural analysis methods in quantification of EP tissue architecture.
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Affiliation(s)
- Igor Pantic
- Institute of Medical Physiology, School of Medicine, University of Belgrade, Visegradska 26/II, 11129 Belgrade, Serbia.
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Pantic I, Basta-Jovanovic G, Starcevic V, Paunovic J, Suzic S, Kojic Z, Pantic S. Complexity reduction of chromatin architecture in macula densa cells during mouse postnatal development. Nephrology (Carlton) 2013; 18:117-24. [DOI: 10.1111/nep.12003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2012] [Indexed: 11/28/2022]
Affiliation(s)
- Igor Pantic
- Institute of Medical Physiology; Faculty of Medicine, University of Belgrade; Belgrade; Serbia
| | | | - Vesna Starcevic
- Institute of Medical Physiology; Faculty of Medicine, University of Belgrade; Belgrade; Serbia
| | - Jovana Paunovic
- Institute of Histology and Embryology; Faculty of Medicine, University of Belgrade; Belgrade; Serbia
| | - Slavica Suzic
- Institute of Medical Physiology; Faculty of Medicine, University of Belgrade; Belgrade; Serbia
| | - Zvezdana Kojic
- Institute of Medical Physiology; Faculty of Medicine, University of Belgrade; Belgrade; Serbia
| | - Senka Pantic
- Institute of Histology and Embryology; Faculty of Medicine, University of Belgrade; Belgrade; Serbia
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Pantic I, Pantic S, Paunovic J. Aging increases nuclear chromatin entropy of erythroid precursor cells in mice spleen hematopoietic tissue. Microsc Microanal 2012; 18:1054-1059. [PMID: 23058597 DOI: 10.1017/s1431927612001377] [Citation(s) in RCA: 13] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Despite recent advances in hematopoietic tissue research, effects of aging on hematopoietic erythroid precursor (EP) cells are unclear. In this article we present results suggesting that chromatin textural entropy of EP cells in mouse spleen increases with age, while chromatin homogeneity decreases. The experiment was conducted on a total of 32 male Swiss white mice. Spleen tissue was acquired from four age groups: 10 days, 1 month, 4 months, and 7 months old mice. A total of 640 randomly selected, nonoverlapping EP cell nuclei (20 per animal) were analyzed using the gray level co-occurrence matrix method. There was statistically highly significant difference between the age groups, both in chromatin entropy (ANOVA, F = 12.99, p < 0.0001) and in homogeneity (ANOVA, F = 7.05, p < 0.001). When the individual groups were compared (ANOVA post hoc test), statistical difference was detected in all group pairs, except between the animals 4 months and 7 months old, either in chromatin entropy or homogeneity. The detected increase of chromatin disorder in mouse juvenile period/early adulthood suggests that cell intrinsic factors such as epigenetic dysregulation and DNA damage accumulation may have an important role in EP cell aging.
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Affiliation(s)
- Igor Pantic
- Institute of Medical Physiology, Faculty of Medicine, University of Belgrade, Visegradska 26/II, 11000 Belgrade, Serbia.
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Pantic I, Pantic S, Basta-Jovanovic G. Gray level co-occurrence matrix texture analysis of germinal center light zone lymphocyte nuclei: physiology viewpoint with focus on apoptosis. Microsc Microanal 2012; 18:470-5. [PMID: 22444139 DOI: 10.1017/s1431927612000098] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In our study we investigated the relationship between conventional morphometric indicators of nuclear size and shape (area and circularity) and the parameters of gray level co-occurrence matrix texture analysis (entropy, homogeneity, and angular second moment) in cells committed to apoptosis. A total of 432 lymphocyte nuclei images from the spleen germinal center light zones (cells in early stages of apoptosis) were obtained from eight healthy male guinea pigs previously immunized with sheep red blood cells (antigen). For each nucleus, area, circularity, entropy, homogeneity, and angular second moment were determined. All measured parameters of gray level co-occurrence matrix (GLCM) were significantly correlated with morphometric indicators of nuclear size and shape. The strongest correlation was observed between GLCM homogeneity and nuclear area (p < 0.0001, r(s) = 0.61). Angular second moment values were also highly significantly correlated with nuclear area (r(s)= 0.39, p < 0.0001). These results indicate that the GLCM method may be a powerful tool in evaluation of ultrastructural nuclear changes during early stages of the apoptotic process.
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Affiliation(s)
- Igor Pantic
- Institute of Medical Physiology, Faculty of Medicine, University of Belgrade, Visegradska 26/II, 11000 Belgrade, Serbia
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Pantic I, Damjanovic A, Todorovic J, Topalovic D, Bojovic-Jovic D, Ristic S, Pantic S. Association between online social networking and depression in high school students: behavioral physiology viewpoint. Psychiatr Danub 2012; 24:90-93. [PMID: 22447092] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Frequent use of Facebook and other social networks is thought to be associated with certain behavioral changes, and some authors have expressed concerns about its possible detrimental effect on mental health. In this work, we investigated the relationship between social networking and depression indicators in adolescent population. SUBJECTS AND METHODS Total of 160 high school students were interviewed using an anonymous, structured questionnaire and Back Depression Inventory - second edition (BDI-II-II). Apart from BDI-II-II, students were asked to provide the data for height and weight, gender, average daily time spent on social networking sites, average time spent watching TV, and sleep duration in a 24-hour period. RESULTS Average BDI-II-II score was 8.19 (SD=5.86). Average daily time spent on social networking was 1.86 h (SD=2.08 h), and average time spent watching TV was 2.44 h (SD=1.74 h). Average body mass index of participants was 21.84 (SD=3.55) and average sleep duration was 7.37 (SD=1.82). BDI-II-II score indicated minimal depression in 104 students, mild depression in 46 students, and moderate depression in 10 students. Statistically significant positive correlation (p<0.05, R=0.15) was found between BDI-II-II score and the time spent on social networking. CONCLUSIONS Our results indicate that online social networking is related to depression. Additional research is required to determine the possible causal nature of this relationship.
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Affiliation(s)
- Igor Pantic
- Institute of Medical Physiology, Faculty of Medicine, University of Belgrade, Serbia
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Pantic I, Malbasa M, Ristic S, Turjacanin D, Medenica S, Paunovic J, Pantic S. Screen viewing, body mass index, cigarette smoking and sleep duration in Belgrade University student population: results of an observational, cross-sectional study. Rev Med Chil 2011; 139:896-901. [PMID: 22051827] [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: 05/31/2023]
Abstract
BACKGROUND Subjects that spend more time working on computers or watching television could have a higher body mass index. AIM To assess the relationship between time spent in front of a screen and studying, body mass index (BMI), smoking, and sleep duration among university students. MATERIAL AND METHODS A cross-sectional study of 734 randomly selected students aged 21 ± 2 years (450 females) that responded an anonymous, structured questionnaire about time spent watching television or in front of a computer, time spent studying, number of daily hours of sleep, smoking habits and number of daily meals. Body mass index was also calculated for all subjects RESULTS Among males, the number of daily sleep hours, time spent working with computers and number of daily meals were significantly higher and time spent studying was significantly lower than females. Nonsmokers ate a significantly higher number of meals and spent less time watching television. No association was observed between time spent in front of a screen and number of sleep hours of body mass index. CONCLUSIONS Men and smokers spend more time working in computers. There is no association between body mass index and time spent in front of screens.
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Affiliation(s)
- Igor Pantic
- University of Belgrade, School of Medicine, Institute of Medical Physiology, Belgrade, Serbia.
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Pantic I, Malbasa M, Ristic S, Turjacanin D, Medenica S, Paunovic J, Pantic S. Screen viewing, body mass index, cigarette smoking and sleep duration in Belgrade University student population: results of an observational, cross-sectional study. Rev Med Chil 2011. [DOI: 10.4067/s0034-98872011000700010] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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