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Jadzic J, Milovanovic P, Tomanovic N, Zivkovic V, Djukic D, Nikolic S, Djuric M, Djonic D. Micro-scale vertebral features in postmenopausal women with alcohol-associated and metabolic-associated fatty liver disease: ex vivo bone quality analyses. J Endocrinol Invest 2024; 47:131-140. [PMID: 37296370 DOI: 10.1007/s40618-023-02130-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
PURPOSE Although epidemiological studies indicate increased fracture risk in women with alcohol-associated liver disease (AALD) and metabolic-associated fatty liver disease (MAFLD), data about their micro-scale bone features are still limited. We aimed to characterize bone quality changes in the anterior mid-transverse part of the first lumbar vertebral body collected from 32 adult postmenopausal females. Based on pathohistological assessment of the liver tissue, individuals were divided into AALD (n = 13), MAFLD (n = 9), and control group (n = 10). METHODS We analyzed trabecular and cortical micro-architecture (using micro-computed tomography), bone mechanical properties (using Vickers microhardness tester), osteocyte lacunar network and bone marrow adiposity morphology (using optic microscopy). Data were adjusted to elude the covariant effects of advanced age and body mass index on our results. RESULTS Our data indicated a minor trend toward deteriorated bone quality in MAFLD women, presented in impaired trabecular and cortical micro-architectural integrity, which could be associated with bone marrow adiposity alterations noted in these women. Additionally, we observed a significant decline in micro-architectural, mechanical, and osteocyte lacunar features in lumbar vertebrae collected from the AALD group. Lastly, our data indicated that vertebral bone deterioration was more prominent in the AALD group than in the MAFLD group. CONCLUSION Our data suggested that MAFLD and AALD are factors that could play a part in compromised vertebral strength of postmenopausal women. Also, our data contribute to understanding the multifactorial nature of bone fragility in these patients and highlight the necessity for developing more effective patient-specific diagnostic, preventive, and therapeutic strategies.
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Affiliation(s)
- J Jadzic
- Faculty of Medicine, Center of Bone Biology, University of Belgrade, Dr. Subotica 4/2, 11000, Belgrade, Serbia
| | - P Milovanovic
- Faculty of Medicine, Center of Bone Biology, University of Belgrade, Dr. Subotica 4/2, 11000, Belgrade, Serbia
| | - N Tomanovic
- Faculty of Medicine, Institute of Pathology, University of Belgrade, Dr. Subotica 1, Belgrade, Serbia
| | - V Zivkovic
- Faculty of Medicine, Center of Bone Biology, University of Belgrade, Dr. Subotica 4/2, 11000, Belgrade, Serbia
- Faculty of Medicine, Institute of Forensic Medicine, University of Belgrade, Deligradska 31a, Belgrade, Serbia
| | - D Djukic
- Faculty of Medicine, Center of Bone Biology, University of Belgrade, Dr. Subotica 4/2, 11000, Belgrade, Serbia
- Faculty of Medicine, Institute of Forensic Medicine, University of Belgrade, Deligradska 31a, Belgrade, Serbia
| | - S Nikolic
- Faculty of Medicine, Center of Bone Biology, University of Belgrade, Dr. Subotica 4/2, 11000, Belgrade, Serbia
- Faculty of Medicine, Institute of Forensic Medicine, University of Belgrade, Deligradska 31a, Belgrade, Serbia
| | - M Djuric
- Faculty of Medicine, Center of Bone Biology, University of Belgrade, Dr. Subotica 4/2, 11000, Belgrade, Serbia
| | - D Djonic
- Faculty of Medicine, Center of Bone Biology, University of Belgrade, Dr. Subotica 4/2, 11000, Belgrade, Serbia.
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Golijanin D, Radovanovic Z, Radovanovic D, Djermanovic A, Djuric M, Zahorjanski S, Lukic D, Kresoja Ignjatovic M, Protic M. Nipple-sparing mastectomy with primary breast reconstruction: Breast cancer local recurrence according to molecular subtype. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01417-4] [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: 11/19/2022]
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Jadzic J, Cvetkovic D, Milovanovic P, Tomanovic N, Zivkovic V, Nikolic S, Djuric M, Djonic D. The micro-structural analysis of lumbar vertebrae in alcoholic liver cirrhosis. Osteoporos Int 2020; 31:2209-2217. [PMID: 32577771 DOI: 10.1007/s00198-020-05509-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 06/16/2020] [Indexed: 02/07/2023]
Abstract
UNLABELLED Although vertebral fracture is more common among alcoholic liver cirrhosis patients when compared to general population, current data on three-dimensional micro-architecture are scarce. Our study showed significant trabecular deterioration in lumbar vertebrae obtained from alcoholic liver cirrhosis donors, suggesting that they should be advised to undergo early-stage screening for osteoporosis. PURPOSE Recent studies showed an increased incidence of vertebral fractures in alcoholic liver cirrhosis (ALC) patients, while data about vertebral micro-structure are still limited. The aim of this study was to compare trabecular and cortical micro-architecture of lumbar vertebrae between ALC patients and healthy age- and sex-matched controls. METHODS Our study included lumbar vertebral samples of male cadaveric donors, divided into ALC (n = 20, age: 59 ± 6 years) and control group (n = 20, age: 59 ± 8 years). Following pathohistological verification of liver cirrhosis, trabecular and cortical bone micro-architecture was analyzed by micro-computed tomography (micro-CT). RESULTS Micro-CT evaluation of the trabecular bone in lumbar vertebrae showed a significant decrease in bone volume fraction, trabecular thickness, trabecular number, and connectivity (p < 0.01). In contrast to trabecular deterioration, prominent alteration in cortical parameters was not observed in lumbar vertebrae of ALC patients (p > 0.05). CONCLUSIONS Our data indicate that susceptibility to non-traumatic fractures in ALC patients could be explained by alterations in trabecular bone micro-architecture. Thus, we genuinely recommend osteological screening of the lumbar spine for all ALC patients in order to evaluate individual fracture risk. Graphical abstract.
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Affiliation(s)
- J Jadzic
- Laboratory for Anthropology and Skeletal Biology, Institute for Anatomy, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - D Cvetkovic
- Institute of Forensic Medicine, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - P Milovanovic
- Laboratory for Anthropology and Skeletal Biology, Institute for Anatomy, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - N Tomanovic
- Institute of Pathology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - V Zivkovic
- Institute of Forensic Medicine, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - S Nikolic
- Institute of Forensic Medicine, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - M Djuric
- Laboratory for Anthropology and Skeletal Biology, Institute for Anatomy, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - D Djonic
- Laboratory for Anthropology and Skeletal Biology, Institute for Anatomy, Faculty of Medicine, University of Belgrade, Belgrade, Serbia.
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Djuric M, Nikolic Turnic T, Kostic S, Stankovic S, Radonjic K, Djuric D, Zivkovic V, Jakovljevic V, Stevanovic P. The effects of gasotransmitters inhibition on biochemical and haematological parameters and oxidative stress in propofol-anaesthetized Wistar male rats. Can J Physiol Pharmacol 2019; 97:1073-1079. [DOI: 10.1139/cjpp-2019-0029] [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: 12/31/2022]
Abstract
This study aimed to investigate the effects of propofol through evaluating its interaction with nitric oxide (NO), hydrogen sulfide (H2S), and carbon monoxide (CO). Wistar male rats were divided in 4 groups: (1) bolus injection of propofol (1% 10 mg/mL, 100 mg/kg bw, i.p.); (2) Nω-nitro-l-arginine methyl ester (L-NAME; NO synthase inhibitor, 60 mg/kg bw, i.p.) + bolus injection of propofol (1% 10 mg/mL, 100 mg/kg bw, i.p.); (3) DL-propargylglycine (DL-PAG; H2S synthase inhibitor, 50 mg/kg bw, i.p.) + bolus injection of propofol (1% 10 mg/mL, 100 mg/kg bw, i.p.); (4) zinc protoporphyrin IX (ZnPPIX; CO synthase inhibitor, 50 μmol/kg bw, i.p.) + bolus injection of propofol (1% 10 mg/mL, 100 mg/kg bw, i.p.). Increased levels of albumins, low-density lipoproteins, alkaline phosphatase, amylase, high-sensitivity Troponin T, and fibrinogen were found in L-NAME + propofol group. Platelet crit, platelet count, total cholesterol, and high-density lipoproteins were elevated in ZnPPIX + propofol group. Hydrogen peroxide was increased in all groups treated with gasotransmitters inhibitors. Reduced glutathione was reduced in all groups, superoxide dismutase activity only in L-NAME + propofol. The effect of propofol on various biochemical, haematological, and oxidative stress markers may be at least in part mediated through interaction with 3 estimated gasotransmitters.
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Affiliation(s)
- M. Djuric
- Department of Anesthesiology, Reanimatology and Intensive Care Medicine, University Clinical Hospital Center “Dr. Dragisa Misovic - Dedinje”, Belgrade, Serbia
| | - T. Nikolic Turnic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - S. Kostic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - S. Stankovic
- Centre of Medical Biochemistry, Clinical Centre of Serbia, Belgrade, Serbia
| | - K. Radonjic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - D. Djuric
- Institute of Medical Physiology “Richard Burian”, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - V. Zivkovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - V. Jakovljevic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
- Department of Human Pathology, 1st Moscow State Medical, University IM Sechenov, Moscow, Russian Federation
| | - P. Stevanovic
- Department of Anesthesiology, Reanimatology and Intensive Care Medicine, University Clinical Hospital Center “Dr. Dragisa Misovic - Dedinje”, Belgrade, Serbia
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Djuric M, Nikolic Turnic T, Kostic S, Radonjic K, Jeremic J, Petkovic A, Bradic J, Milosavljevic I, Srejovic I, Zivkovic V, Djuric D, Jakovljevic V, Stevanovic P. Inhibition of gasotransmitters production and calcium influx affect cardiodynamic variables and cardiac oxidative stress in propofol-anesthetized male Wistar rats. Can J Physiol Pharmacol 2019; 97:850-856. [DOI: 10.1139/cjpp-2018-0719] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
It has been assumed that the cardioprotective effects of propofol are due to its non-anesthetic pleiotropic cardiac and vasodilator effects, in which gasotransmitters (NO, H2S, and CO) as well as calcium influx could be involved. The study on isolated rat heart was performed using 4 experimental groups (n = 7 in each): (1) bolus injection of propofol (100 mg/kg body mass, i.p.); (2) L-NAME (NO synthase inhibitor, 60 mg/kg body mass, i.p.) + propofol; (3) DL-PAG (H2S synthase inhibitor, 50 mg/kg body mass, i.p.) + propofol; (4) ZnPPIX (CO synthase inhibitor, 50 μmol/kg body mass, i.p.) + propofol. Before and after the verapamil (3 μmol/L) administration, cardiodynamic parameters were recorded (dp/dtmax, dp/dtmin, systolic left ventricular pressure, diastolic left ventricular pressure, heart rate, coronary flow), as well as coronary and cardiac oxidative stress parameters. The results showed significant increases of diastolic left ventricular pressure following NO and CO inhibition, but also increases of coronary flow following H2S and CO inhibition. Following verapamil administration, significant decreases of dp/dtmax were noted after NO and CO inhibition, then increase of diastolic left ventricular pressure following CO inhibition, and increase of coronary flow following NO, H2S, or CO inhibition. Oxidative stress markers were increased but catalase activity was significantly decreased in cardiac tissue. Gasotransmitters and calcium influx are involved in pleiotropic cardiovascular effects of propofol in male Wistar rats.
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Affiliation(s)
- M. Djuric
- Department of Anesthesiology, Reanimatology and Intensive Care Medicine, University Clinical Hospital Center “Dr. Dragisa Misovic - Dedinje”, Belgrade, Serbia
| | - T. Nikolic Turnic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - S. Kostic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - K. Radonjic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - J. Jeremic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - A. Petkovic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - J. Bradic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - I. Milosavljevic
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - I. Srejovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - V. Zivkovic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
| | - D. Djuric
- Institute of Medical Physiology “Richard Burian”, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - V. Jakovljevic
- Department of Physiology, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
- Department of Human Pathology, 1st Moscow State Medical, University IM Sechenov, Moscow, Russian Federation
| | - P. Stevanovic
- Department of Anesthesiology, Reanimatology and Intensive Care Medicine, University Clinical Hospital Center “Dr. Dragisa Misovic - Dedinje”, Belgrade, Serbia
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Kostic S, Djuric M, Colovic M, Krstic D, Djuric D. The Effects Of Hydrogen Sulfide Synthase Inhibition Following Acute Administration Of Homocysteine On Oxidative Stress Markers In Rat Plasma. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.849] [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: 11/28/2022]
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Djuric A, Colovic M, Krstic D, Obrenovic R, Micovic Z, Djuric M, Djuric D. The effects of N-acetyl-L-cysteine on subchronic methionine load in male wistar rats: Focus on standard biochemical parameters and markers of homocysteine metabolism in blood. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.642] [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: 11/24/2022]
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Boskovic T, Skrbic D, Pena Karan S, Dragisic D, Povazan D, Djuric M. Computed tomography features in patients with non-cystic fibrosis bronchiectasis and COPD – one Institution experience. Pneumologie 2016. [DOI: 10.1055/s-0036-1592273] [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: 10/20/2022]
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Djuric M, Radovanovic Z, Lukic D, Ranisavljevic M, Radovanovic D, Vicko F. 309. Early surgical complications of extra-levator abdominoperineal excision for low rectal cancer. Eur J Surg Oncol 2016. [DOI: 10.1016/j.ejso.2016.06.205] [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: 11/25/2022] Open
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Abstract
Background The aim of this study was to confirm the presence of herpes simplex virus type 1 and 2 on the oral mucosa, in patients undergoing chemotherapy, by means of polymerase chain reaction (PCR). Methods The research was carried out on 40 patients receiving chemotherapy as treatment for different malignancies. The status of oral mucosa and viral presence were assessed in all patients at the initial examination (prior to chemotherapy), and at the control examination (two weeks after the initiation of the chemotherapeutic cycle). Results The presence of HSV-1 was detected in 28 patients (70%) prior to chemotherapy, of whom 7 (25%) manifested oral complications. The control examination showed the presence of HSV-1 in 35 patients (87.5%), of whom 23 (65.7%) presented oral mucosa changes. HSV-2 has not been detected in any of the patients.
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Affiliation(s)
- M Djuric
- Clinic of Dentistry, School of Medicine, University of Novi Sad, Novi Sad, Serbia.
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Culafić D, Djonic D, Culafic-Vojinovic V, Ignjatovic S, Soldatovic I, Vasic J, Beck TJ, Djuric M. Evidence of degraded BMD and geometry at the proximal femora in male patients with alcoholic liver cirrhosis. Osteoporos Int 2015; 26:253-9. [PMID: 25172381 DOI: 10.1007/s00198-014-2849-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 08/10/2014] [Indexed: 02/06/2023]
Abstract
UNLABELLED We examined the association of alcoholic cirrhosis in 33 patients with areal bone mineral density (BMD) and the assessed bone geometric strength of their proximal femora. Lower areal BMD, cross-sectional area and section modulus, thinner cortex, and higher buckling ratio suggest that the alcoholic liver cirrhosis is associated with lower measures of bone strength. INTRODUCTION Hepatic bone disease is an important complication of chronic liver disease and is associated with significant morbidity through fractures resulting in pain, deformity, and immobility. In this study, we examined the association of alcoholic cirrhosis and liver insufficiency stage with areal bone mineral density (aBMD) and additionally employed hip structure analysis (HSA) as an advanced method to assess bone geometric strength of the proximal femur in men with alcoholic liver cirrhosis. METHODS The study included 33 male patients with alcoholic liver cirrhosis and a control group of 36 healthy patients. Laboratory testing included the following biochemical markers of bone turnover: serum levels of osteocalcin and C-telopeptide of type 1 collagen. Areal BMD was measured by dual x-ray absorptiometry on the proximal femora. Structural parameters were then derived from these scans using hip structure analysis software. RESULTS After adjusting for age, body height, and weight, we found lower cross-sectional area (p = 0.005) and section modulus (p = 0.005), thinner cortex (p = 0.012), and higher buckling ratio (p = 0.043) in the neck region among patients with cirrhosis. The findings suggest that alcoholic liver cirrhosis is associated with lower measures of bone strength. These findings were consistent with decreased osteocalcin values and increased C-telopeptide of type 1 collagen in patients with cirrhosis, indicating reduction in bone formation and increased bone resorption. CONCLUSION Our results emphasize that HSA-derived structural indices of proximal femoral structure may be an important index of greater fragility in patients with alcoholic cirrhosis.
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Affiliation(s)
- Dj Culafić
- Clinic of Gastroenterology, Clinical Center of Serbia, School of Medicine, University of Belgrade, Belgrade, Serbia
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Antic S, Saveljic I, Nikolic D, Jovicic G, Filipovic N, Rakocevic Z, Djuric M. Does the presence of an unerupted lower third molar influence the risk of mandibular angle and condylar fractures? Int J Oral Maxillofac Surg 2014; 45:588-92. [PMID: 25448405 DOI: 10.1016/j.ijom.2014.09.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 07/21/2014] [Accepted: 09/25/2014] [Indexed: 10/22/2022]
Abstract
It has been suggested that unerupted lower third molars (M3) increase the fragility of the mandibular angle and simultaneously decrease the risk of condylar fracture. However, it is unknown whether this applies regardless of the direction and point of impact of the traumatic force. The aim of this study was to investigate the impact of an unerupted M3 on the fragility of the angle and condyle in terms of a force acting from different directions and affecting different regions of the mandible. Computed tomography scans of a human mandible and finite element methodology were used to obtain two three-dimensional models: a model with, and the other without an unerupted M3. A force of 2000N was applied to three different regions of the models: the symphysis, ipsilateral body, and contralateral body, respectively. When the force was applied to the mandibular body, the results revealed increased angle fragility in cases with unerupted M3. When the force was applied to the symphysis, the condyle region showed higher fragility, irrespective of the presence of an unerupted M3. In summary, fragility of the angle and condyle regions depends on the presence of an unerupted M3 and on the direction and point of impact of the force.
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Affiliation(s)
- S Antic
- Laboratory for Anthropology, Institute of Anatomy, University of Belgrade - School of Medicine, Belgrade, Serbia
| | - I Saveljic
- Laboratory for Anthropology, Institute of Anatomy, University of Belgrade - School of Medicine, Belgrade, Serbia
| | - D Nikolic
- Laboratory for Anthropology, Institute of Anatomy, University of Belgrade - School of Medicine, Belgrade, Serbia
| | - G Jovicic
- Laboratory for Anthropology, Institute of Anatomy, University of Belgrade - School of Medicine, Belgrade, Serbia
| | - N Filipovic
- Laboratory for Anthropology, Institute of Anatomy, University of Belgrade - School of Medicine, Belgrade, Serbia
| | - Z Rakocevic
- Laboratory for Anthropology, Institute of Anatomy, University of Belgrade - School of Medicine, Belgrade, Serbia
| | - M Djuric
- Laboratory for Anthropology, Institute of Anatomy, University of Belgrade - School of Medicine, Belgrade, Serbia.
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Zelic K, Vukicevic A, Jovicic G, Aleksandrovic S, Filipovic N, Djuric M. Mechanical weakening of devitalized teeth: three-dimensional Finite Element Analysis and prediction of tooth fracture. Int Endod J 2014; 48:850-63. [PMID: 25243348 DOI: 10.1111/iej.12381] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [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: 06/21/2013] [Accepted: 09/17/2014] [Indexed: 11/29/2022]
Abstract
AIM To determine to which extent cavity preparation and each step of dentine removal in the process of root canal treatment (access cavity preparation and root canal enlargement) both individually and jointly contribute to the weakening of the tooth. METHODS Numerical analysis using finite element method (FEM) of separate and combined influence of two-surface Class II preparation and root canal treatment was undertaken to evaluate the decrease in tooth strength. The influence of the two stages in root canal treatment, access cavity preparation and root canal enlargement, was also analysed separately and jointly. After each of these phases, the crown was restored with composite resin, and the FEA was performed only on restored teeth. To estimate the influence of all these procedures on tooth fracture resistance numerically, a Failure Index based on the maximum principal stress criterion (MPCS) was applied. Compressive and tensile stresses were analysed separately and corresponding Failure Indices were calculated. RESULTS A two-surface resin composite restoration weakened the tooth by 23.25%. Nevertheless, the Failure Indices showed that this tooth was not likely to fracture even under high occlusal stress (710N). However, after access cavity preparation, the Failure Indices reached the point where, under high occlusal force that may occur in the posterior area, a tooth fracture occurred. The enlargement of root canals had an additional, but relatively small impact on tooth weakening, making the tooth even more susceptible to fracture. The combined influence of both cavity preparation and root canal enlargement led to weakening of 62.6% under a load of 710N, ultimately causing tooth fracture. CONCLUSION The combined finite element method and the maximum principal stress analysis gave insight into the fracture mechanisms of teeth with two-surface composite restorations followed by root canal preparation. Removal of tooth tissue, despite its subsequent restoration with dental materials, weakened the tooth by changing the stress intensity and distribution through tooth structures. Access cavity preparation had the greatest influence on tooth strength whilst canal enlargement did not contribute to this process substantially.
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Affiliation(s)
- K Zelic
- Laboratory for Anthropology, Institute of Anatomy, School of Medicine, University of Belgrade, Belgrade, Serbia
| | - A Vukicevic
- Faculty of Engineering, University of Kragujevac, Kragujevac, Serbia
| | - G Jovicic
- Faculty of Engineering, University of Kragujevac, Kragujevac, Serbia
| | - S Aleksandrovic
- Faculty of Engineering, University of Kragujevac, Kragujevac, Serbia
| | - N Filipovic
- Faculty of Engineering, University of Kragujevac, Kragujevac, Serbia.,Bioengineering Research and Development Center Kragujevac, Kragujevac, Serbia
| | - M Djuric
- Laboratory for Anthropology, Institute of Anatomy, School of Medicine, University of Belgrade, Belgrade, Serbia
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Skrbic D, Trudic A, Povazan D, Kurucin T, Djuric M. 161 The first results of antimicrobial susceptibility of isolates from adult patients with cystic fibrosis from the Province of Vojvodina, Serbia. J Cyst Fibros 2014. [DOI: 10.1016/s1569-1993(14)60297-6] [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: 10/25/2022]
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Samardzic J, Svob Strac D, Djuric M, Obradovic D. EPA-1779 – Acute and chronic effects of neurosteroid dehydroepiandrosterone on rat behavior in the foced swim test. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78902-3] [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: 10/25/2022] Open
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Bernhard A, Milovanovic P, Zimmermann EA, Hahn M, Djonic D, Krause M, Breer S, Püschel K, Djuric M, Amling M, Busse B. Micro-morphological properties of osteons reveal changes in cortical bone stability during aging, osteoporosis, and bisphosphonate treatment in women. Osteoporos Int 2013; 24:2671-80. [PMID: 23632826 DOI: 10.1007/s00198-013-2374-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 04/09/2013] [Indexed: 02/07/2023]
Abstract
SUMMARY We analyzed morphological characteristics of osteons along with the geometrical indices of individual osteonal mechanical stability in young, healthy aged, untreated osteoporotic, and bisphosphonate-treated osteoporotic women. Our study revealed significant intergroup differences in osteonal morphology and osteocyte lacunae indicating different remodeling patterns with implications for fracture susceptibility. INTRODUCTION Bone remodeling is the key process in bone structural reorganization, and its alterations lead to changes in bone mechanical strength. Since osteons reflect different bone remodeling patterns, we hypothesize that the femoral cortices of females under miscellaneous age, disease and treatment conditions will display distinct osteonal morphology and osteocyte lacunar numbers along with different mechanical properties. METHODS The specimens used in this study were collected at autopsy from 35 female donors (young group, n = 6, age 32 ± 8 years; aged group, n = 10, age 79 ± 9 years; osteoporosis group, n = 10, age 81 ± 9 years; and bisphosphonate group, n = 9, age 81 ± 7 years). Von Kossa-modified stained femoral proximal diaphyseal sections were evaluated for osteonal morphometric parameters and osteocyte lacunar data. Geometrical indices of osteonal cross-sections were calculated to assess the mechanical stability of individual osteons, in terms of their resistance to compression, bending, and buckling. RESULTS The morphological assessment of osteons and quantification of their osteocyte lacunae revealed significant differences between the young, aged, osteoporosis and bisphosphonate-treated groups. Calculated osteonal geometric indices provided estimates of the individual osteons' resistance to compression, bending and buckling based on their size. In particular, the osteons in the bisphosphonate-treated group presented improved osteonal geometry along with increased numbers of osteocyte lacunae that had been formerly impaired due to aging and osteoporosis. CONCLUSIONS The data derived from osteons (as the basic structural units of the cortical bone) in different skeletal conditions can be employed to highlight structural factors contributing to the fracture susceptibility of various groups of individuals.
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Affiliation(s)
- A Bernhard
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, Lottestr. 59, 22529, Hamburg, Germany
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Kravljanac R, Djuric M, Zamurovic D, Tadic B. 17. Hypothalamic hamartomas – Diagnostic and therapeutic challenge. Clin Neurophysiol 2013. [DOI: 10.1016/j.clinph.2012.12.026] [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: 10/26/2022]
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Abstract
BACKGROUND Developmental disturbances of the paranasal sinuses are proposed as the cause of osteoma. We examined whether such disturbances may result in the frequent presence of anatomical variations of the paranasal sinuses in patients with osteoma. METHODOLOGY/PRINCIPAL The study was performed retrospectively on 2,820 patients subjected to CT examination during 2005 - 2011. Demographic and CT characteristics of osteoma, and associated pathological findings were evaluated for 104 patients with diagnosed osteoma. The presence of anatomical variations was assessed for 51 osteoma patients with a complete medical history, and for 1,233 patients from a control group. RESULTS The prevalence of osteomas was found to be 3.69%, with male to female ratio 1.08:1. The frontal sinus was most commonly affected. The presence of anatomical variations was more frequent in patients with osteoma than in controls, with significant differences confirmed for the sphenomaxillary plate, infraorbital cell, and crista galli pneumatization. CONCLUSIONS The paranasal sinus osteoma is associated with higher prevalence of anatomical variations. This can be explained either by the stronger influence of genetic and/or environmental factors on the development of the paranasal sinuses in patients with osteoma, or by their higher susceptibility to above mentioned factors.
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Affiliation(s)
- A Janovic
- Department of Radiology, University of Belgrade, Belgrade, Serbia
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Kravljanac R, Djuric M, Jovic N, Zamurovic D. 10. EEG characteristics in children with epilepsia partialis continua caused by inflammatory CNS disorders. Clin Neurophysiol 2012. [DOI: 10.1016/j.clinph.2011.11.050] [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: 10/28/2022]
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21
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Djuric M, Cakic S, Hadzi-Mihailovic M, Petrovic D, Jankovic L. Oral status in patients receiving 5-fluorouracil for colorectal cancer. J BUON 2010; 15:475-479. [PMID: 20941813] [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: 05/30/2023]
Abstract
PURPOSE Oral complications are frequent and troublesome symptoms for those undergoing chemotherapy for cancer. Several antineoplastic agents are proved to have stomatotoxic potential, among them 5-fluorouracil (5-FU). The aim of the present study was to evaluate the oral status and patient experiences during chemotherapy with 5-FU for colorectal cancer. METHODS Twenty-eight patients treated with 5-day 5-FU plus leucovorin entered this study. Positive data about oral symptoms were taken by anamnesis. Mucositis severity index, gingival index, plaque index, probing pocket depth and bleeding on probing have been used to assess oral mucosa and periodontal status of the patients. Patients were examined prior to chemotherapy and 14 days after the start of the chemotherapy cycle. RESULTS Mild to moderate subjective complaints concerning oral cavity were reported by 17.9% of patients before and 39.2% of patients after chemotherapy. Clinical examination revealed oral mucosa damage in 10.7% and 35.7% of patients, with mean mucositis score of 0.14 and 0.54 before and after chemotherapy, respectively. Although mean values of all periodontal indices were elevated after chemotherapy, only increase in gingival index was statistically significant (p=0.035). Mucositis was significantly correlated with oral pain (p=0.00), xerostomia (p=0.00), and plaque index (p=0.077), while the correlation between mucositis and the rest of the examined parameters was not significant. CONCLUSION Oral complications were not highly expressed in this study. Although 5-FU is considered to exert significant stomatotoxic effect, severe mucositis was far less common in this study compared to studies reported elsewhere.
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Affiliation(s)
- M Djuric
- Clinic for Dentistry, School of Medicine, Novi Sad, Serbia.
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Hadzi-Mihailovic M, Raybaud H, Monteil R, Cakic S, Djuric M, Jankovic L. Bcl-2 expression and its possible influence on malignant transformation of oral lichen planus. J BUON 2010; 15:362-368. [PMID: 20658736] [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: 05/29/2023]
Abstract
PURPOSE The aim of this study was to investigate the malignant potential of oral lichen planus (OLP) on the basis of the expression of the Bcl-2 marker in healthy individuals (H), patients with OLP and patients with squamous cell carcinoma (SCC), and to establish potential interdependence between expression of Bcl-2 and the different clinical and histopathological parameters in H, OLP, and SCC. METHODS Immunohistochemistry for Bcl-2 was carried out using an avidin-biotin peroxidase complex method. Tissue sections were treated with mouse monoclonal antibody against Bcl-2 (124, DAKO A/S, Denmark; dilution 1/100). Immunohistochemical parameters measured included total tissue area, total stained area and intensity of stain. RESULTS Keratinocytes were not Bcl-2 positive in H and were sparsely positive in OLP. The number of lymphocytes stained with Bcl-2 was significantly lower in H as compared to patients with SCC and OLP. Bcl-2 staining was weak to moderate in OLP, and moderate to intense in SCC. Bcl-2-positive lymphocytes were more expressed in older OLP patients (>55 years), and in OLP specimens with orthokeratinized epithelium, less developed acanthosis and highest grade of lymphocyte expression. CONCLUSION Bcl-2 may not serve as a prognostic biomarker in oral cancer development from OLP, but it could help in selecting patients with higher need of follow up to prevent malignancy.
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Affiliation(s)
- M Hadzi-Mihailovic
- Clinic of Periodontology and Oral Medicine, Faculty of Dentistry, University of Belgrade, Belgrade, Serbia.
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Kravljanac R, Djuric M, Jovic N, Pekmezovic T. Predictive value of EEG for prognosis of status epilepticus in children. Clin Neurophysiol 2008. [DOI: 10.1016/j.clinph.2007.11.024] [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: 11/29/2022]
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Djuric V, Djuric M, Bogic M, Ljaljevic J. The rise of respiratory resistance as a measurement of airway response during bronchoprovocation test with methacholine. J Allergy Clin Immunol 2002. [DOI: 10.1016/s0091-6749(02)81181-2] [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: 11/28/2022]
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Tuman KJ, McCarthy RJ, Djuric M, Rizzo V, Ivankovich AD. Evaluation of coagulation during cardiopulmonary bypass with a heparinase-modified thromboelastographic assay. J Cardiothorac Vasc Anesth 1994; 8:144-9. [PMID: 8204806 DOI: 10.1016/1053-0770(94)90052-3] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Thromboelastography (TEG) is a useful method of assessing perioperative coagulation function in patients undergoing cardiac surgery. The presence of significant amounts of heparin in blood samples, however, prevents determination of changes in coagulation function by TEG or introduces artifactual error if samples contain heparin that is not present in vivo. For these reasons, whole blood coagulation function monitoring with TEG has not been feasible during cardiopulmonary bypass (CPB) with heparin anticoagulation. In this study, data obtained from 42 volunteers are presented to describe the effects of heparinase on TEG variables in the presence and absence of heparin. These data indicate that heparinase does not affect TEG parameters of whole blood not containing heparin and reverses the TEG effects of low levels of heparin contamination. Subsequently, 51 patients undergoing coronary artery surgery were studied using a modified TEG assay that incorporates in vitro application of heparinase to allow measurement of TEG parameters before, during, and after CPB. Heparinase-modified TEG assays facilitated diagnosis of heparin contamination in preoperative blood samples and permitted baseline TEG evaluation in patients receiving preoperative heparin infusions. Heparinase-modified TEG assays revealed declines in alpha and MA values during CPB, which persisted and significantly correlated with values after protamine infusion (alpha: r = 0.77, P = 0.001; MA: r = 0.78, P = 0.001).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- K J Tuman
- Department of Anesthesiology, Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL 60612
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Donnelly AJ, Djuric M. Cardioplegia solutions. Am J Hosp Pharm 1991; 48:2444-60. [PMID: 1746583] [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: 12/28/2022]
Abstract
The mechanism of action, characteristics and components, dosage and administration, and adverse effects of cardioplegia solution are described. The pharmacist's role in the formulation, preparation, and quality control of cardioplegia solution is also discussed. The use of cardioplegia solution has substantially increased the safety of cardiac surgery. It protects the myocardium by inducing a rapid and complete diastolic arrest, minimizing myocardial energy requirements and preventing ischemic damage during the arrest phase, and minimizing or preventing reperfusion injury once coronary blood flow is restored. Chemical components added to the cardioplegia solution, such as potassium and glucose, are largely responsible for this protective effect. Basic characteristics of cardioplegia solutions include temperature, osmolarity, and pH. Crystalloid solution has traditionally been used as a vehicle for cardioplegia solution; however, laboratory and clinical studies have demonstrated favorable effects of blood-based cardioplegia solution. Single-pass and recirculating delivery systems can be used to administer either crystalloid or blood cardioplegia solutions. Pharmacists can play a major role in the formulation, preparation, distribution, and quality control of cardioplegia solutions; these solutions prevent myocardial injury during the arrest and reperfusion phases of cardiac surgery.
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Affiliation(s)
- A J Donnelly
- Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL 60612
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Djuric M, Lemberski G, Chambard F. [The day hospital]. Soins 1989:56-7. [PMID: 2705034] [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: 01/02/2023]
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Briele HA, Djuric M, Jung DT, Mortell T, Patel MK, Das Gupta TK. Pharmacokinetics of melphalan in clinical isolation perfusion of the extremities. Cancer Res 1985; 45:1885-9. [PMID: 3978649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The pharmacokinetics of melphalan in clinical hyperthermic isolation perfusion was studied in 16 patients with malignant melanoma. Analysis by computer-generated lines of best fit showed that the loss of melphalan from perfusate conforms best to a biexponential equation. The initial loss with a half-life (t1/2) of approximately 5 to 10 min is interpreted as rapid uptake of melphalan by the tissue of the perfused extremity. The terminal portion of the curve with a half-life of approximately 35 to 50 min is interpreted as due predominantly to the hydrolysis of melphalan, with a lesser component of loss due to absorption of melphalan to the filters and tubing of the perfusion apparatus. Determination of the area under the curve suggests that there is no appreciable uptake of melphalan by the tissue of the perfused extremity after 30 min.
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Djuric M, Jelenic M, Mojsilovic Z. [Injury to the vaginal wall causing evisceration of the small intestine]. SRP ARK CELOK LEK 1973; 101:457-9. [PMID: 4786886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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