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Sen A, Erdivanlı B, Tümkaya L, Uydu HA, Mercantepe T, Batcik Ş, Ozdemir A. The effects of dexmedetomidine on trauma-induced secondary injury in rat brain. Neurol Res 2024; 46:23-32. [PMID: 37842946 DOI: 10.1080/01616412.2023.2257446] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 07/29/2023] [Indexed: 10/17/2023]
Abstract
BACKGROUND The objective of this study was to investigate the effect of dexmedetomidine (Dex), a sedative drug with little or no depressant effect on respiratory centers, on secondary injury in rat brain tissue by means of the Na+/K+ ATPase enzyme, which maintains the cell membrane ion gradient; malondialdehyde, an indicator of membrane lipid peroxidation; glutathione, an indicator of antioxidant capacity; and histopathological analyses. METHODS Eighteen rats were randomized into three groups: the trauma group received anesthesia, followed by head trauma with a Mild Traumatic Brain Injury Apparatus; the Trauma+Dex group received an additional treatment of 100 µg/kg intraperitoneal dexmedetomidine daily for three days; the Control group received anesthesia only. RESULTS The highest MDA levels compared to the Control group were found in the Trauma group. Mean levels in the Trauma+Dex group were lower, albeit still significantly high compared to the Control group. Glutathione levels were similar in all groups. Na/K-ATPase levels were significantly lower in the Trauma group compared to both the Control group and the Trauma+Dex group. Histopathologic findings of tissue degeneration including edema, vascular congestion and neuronal injury, and cleaved caspase-3 levels were lower in the Trauma+Dex group compared with the Trauma group. CONCLUSIONS Dexmedetomidine administered during the early stage of traumatic brain injury may inhibit caspase-3 cleavageHowever, the mechanism does not seem to be related to the improvement of MDA or GSH levels.
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Affiliation(s)
- Ahmet Sen
- Department of Anesthesiology and Reanimation, Trabzon Faculty of Medicine, University of Health Sciences, Trabzon, Turkey
| | - Basar Erdivanlı
- Department of Anestjesıology and Reamınatıon, Faculty of Medıcıne, Recep Tayyıp Erdogan Unıversıty
| | - Levent Tümkaya
- Histology and Embryology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Hüseyin Avni Uydu
- Histology and Embryology and Biochemistry, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Tolga Mercantepe
- Histology and Embryology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Şule Batcik
- Department of Anestjesıology and Reamınatıon, Faculty of Medıcıne, Recep Tayyıp Erdogan Unıversıty
| | - Abdullah Ozdemir
- Department of Anestjesıology and Reamınatıon, Faculty of Medıcıne, Recep Tayyıp Erdogan Unıversıty
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Ozdemir A, Kurtoglu S, Halis H, Bastug O. An evaluation of ursodeoxycholic acid treatment in prolonged unconjugated hyperbilirubinemia due to breast milk. Niger J Clin Pract 2023; 26:1226-1233. [PMID: 37794533 DOI: 10.4103/njcp.njcp_216_22] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
Background/Aim Prolonged jaundice is one of the most common problems during neonatal period. The aim of this study was to evaluate the efficiency of ursodeoxycholic acid (UDCA) treatment in newborn infants with prolonged unconjugated hyperbilirubinemia. Materials and Methods The present study included 27 patients who were fed by breast milk and followed up in the outpatient clinic due to prolonged jaundice without any underlying etiological factor; 10 mg/kg/day UDCA was administrated in two doses for 7 days. Furthermore, 20 newborns diagnosed with prolonged jaundice with same characteristics were enrolled as the control group. The control group was also given a placebo; demographic characteristics, liver functions tests before and after the treatment, bilirubin decrease rates, and hemogram parameters of groups were compared. Results Total bilirubin levels in the study and control groups before the treatment were 16.02 ± 1.41 mg/dL and 15.93 ± 1.66 mg/dL, respectively (P = 0.84). Total bilirubin levels in the study and control groups at day 7 after UDCA treatment were detected 8.18 ± 2.31 mg/dL and 13.92 ± 2.66 mg/dL, respectively (P < 0.001), and at day 14 after the treatment were 5.45 ± 2.59 mg/dL and 11.91 ± 2.83 mg/dL, respectively (P < 0.001). Furthermore, serum aspartate aminotransferase (AST) was detected <21 U/L in the ROC analysis after UDCA treatment (P = 0.04). Conclusion The study outcomes indicated that an efficient reduction in total bilirubin levels may be achieved, and outpatient clinic follow-up period may be reduced in patients whom UDCA was administrated. Moreover, it may be speculated that AST can be used to evaluate the efficacy after treatment. However, studies with larger sample sizes are needed for the routine use of UDCA in the treatment of prolonged jaundice.
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Affiliation(s)
- A Ozdemir
- Department of Neonatalogy, University of Health Sciences, Kayseri City Hospital, Turkey
| | - S Kurtoglu
- Department of Pediatric Endocrinology, Memorial Kayseri Hospital, Kayseri, Turkey
| | - H Halis
- Department of Neonatalogy, Irmet Hospital, Tekirdag, Turkey
| | - O Bastug
- Department of Neonatalogy, University of Health Sciences, Kayseri City Hospital, Turkey
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Ozdemir A, Topçu A, Mercantepe T, Arpa M, Mataracı Karakaş S, Ozdemir A, Tümkaya L, Mercantepe F. The effects of dexmedetomidine on early acute kidney injury in severely burned rats. Eur Rev Med Pharmacol Sci 2023; 27:1311-1321. [PMID: 36876698 DOI: 10.26355/eurrev_202302_31365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
OBJECTIVE Burns are a global medical and economic problem. In addition to high costs, the lengthy therapeutic process and the emotional trauma experienced by patients and their families indirectly worsen the socioeconomic damage caused. Kidney failure observed after burns is highly correlated with mortality. MATERIALS AND METHODS Twenty-eight male Sprague-Dawley rats (age four months, weight 250-350 g) were included in the study. They were randomly assigned into four groups consisting of seven rats each with similar mean weights. Group 1 (n=7) represented the healthy control group (C), Group 2 (n=7) the Sham+dexmedetomidine (DEX) 100 mcg/kg (three doses) (S+DEX100) group, Group 3 (n=7) the 30% Burn (B), and Group 4 (n=7) the 30% Burn+DEX 100 mcg/kg/day group (B+DEX100) (three doses). Thiobarbituric acid reactive substances (TBARS), total thiol (TT), interleukin-1 (IL-1) and tumor necrosis factor-α (TNF-α) values in kidney tissues were investigated biochemically, and histopathological analyses were also performed. Nuclear factor κB (NF-κB)/p65 was measured using immunohistochemistry, and the TUNEL assay was applied to indicate apoptotic tubular epithelial cells. RESULTS TBARS, IL-1, and TNF-α in kidney tissues decreased in the B+DEX100 group compared to the 30% burn group, while total thiol values increased. Histopathologically, atypical glomeruli, particularly necrotic tubules, and inflammation in peritubular areas decreased in the B+DEX100 group compared to the 30% burn group. In addition, apoptotic tubular epithelial cells exhibiting TUNEL positivity and tubular epithelial cells exhibiting NF-кβ/p65 positivity also decreased in the B+DEX100 group compared to the 30% burn group. CONCLUSIONS Dexmedetomidine reduced apoptotic activity in rats and exhibited anti-inflammatory antioxidant effects in the burn model in this study.
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Affiliation(s)
- A Ozdemir
- Department of Anesthesiology and Reanimation, Department of Pharmacology, Department of Histology and Embryology, Department of Medical Biochemistry, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey.
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Erdivanli B, Ozdemir A, Sen A, Mercantepe T, Kazdal H, Uydu HA, Tumkaya L. Protective effect of thymoquinone in preventing trauma-related damage: an experimental study. Biomarkers 2021; 27:95-100. [PMID: 34890510 DOI: 10.1080/1354750x.2021.2016972] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND Secondary injury is a potentially modifiable factor of outcome in traumatic brain injury. This study aimed to investigate thymoquinone's effects on trauma-induced neuronal damage. METHODS Eighteen adult female Sprague-Dawley rats were assigned into three groups following ketamine and xylazine anaesthesia (n = 6): Control, Trauma, Trauma + Thymoquinone. First dose of thymoquinone was administered three hours after the trauma. RESULTS The trauma group showed significant oedema, vascular congestion, and ischaemia. Also, caspase-3 activity and malondialdehyde content of brain tissue was significantly increased, and Na,K-ATPase activity and glutathione levels were significantly reduced. Thymoquinone significantly reduced oedema, vascular congestion, ischaemia, and caspase-3 activity compared with the trauma group. While Na,K-ATPase activity and glutathione levels was similar to the Control group, malondialdehyde content was similar to the trauma group. CONCLUSIONS This study showed that low dose thymoquinone exhibited a neuroprotective effect following severe traumatic brain injury, if administered within three hours of injury. Similar levels of glutathione and malondialdehyde suggest no antioxidant effect. Significant reduction in oedema and ischaemia in the neuron cells and partially preserved activity of Na,K-ATPase suggest that thymoquinone protects mitochondrial functions and energy levels of the neuronal cells following severe traumatic brain injury.
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Affiliation(s)
- Basar Erdivanli
- Department of Anesthesiology and Reanimation, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Abdullah Ozdemir
- Department of Anesthesiology and Reanimation, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Ahmet Sen
- Department of Anesthesiology and Reanimation, Faculty of Medicine, Samsun Education and Training Hospital, Samsun, Turkey
| | - Tolga Mercantepe
- Department of Histology and Embryology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Hizir Kazdal
- Department of Anesthesiology and Reanimation, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Huseyin Avni Uydu
- Department of Biochemistry, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
| | - Levent Tumkaya
- Department of Histology and Embryology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, Turkey
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Ulusoy H, Kangalgil M, Kucuk A, Ozdemir A, Karahan S, Yaman SO, Yavuz HB, Ok U. Effects of different lipid emulsions on serum adipokines, inflammatory markers and mortality in critically ill patients with sepsis: a prospective observational cohort study. Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.619] [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: 11/24/2022]
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Yorganci K, Ozdemir A, Hamaloglu E, Sokmener C. Perforation of Acute Calculous Meckel’s Diverticulitis: a Rare Cause of Acute Abdomen in Elderly. Acta Chir Belg 2020. [DOI: 10.1080/00015458.2000.12098549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- K. Yorganci
- Departments of General Surgery, Hacettepe University School of Medicine, Ankara, Turkey
| | - A. Ozdemir
- Departments of General Surgery, Hacettepe University School of Medicine, Ankara, Turkey
| | - E. Hamaloglu
- Departments of General Surgery, Hacettepe University School of Medicine, Ankara, Turkey
| | - C. Sokmener
- Departments of Pathology, Hacettepe University School of Medicine, Ankara, Turkey
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Onay Z, Gursoy TR, Aslan A, Eyuboglu TS, Cakir E, Cobanoglu N, Pekcan S, Cinel G, Dogru D, Ozcelik U, Yalcin E, Sen V, Ercan O, Kilinc A, Yazan H, Altintas D, Demir E, Bingol A, Sapan N, Celebi E, Tugcu G, Ozdemir A, Harmanci K, Kose M, Emiralioglu N, Tamay Z, Yuksel H, Ozcan G, Topal E, Can D, Korkmaz P, Caltepe G, Kilic M, Ozdogan S. P060 Indications and contraindications for lung transplantation of cystic fibrosis patients in Turkey. J Cyst Fibros 2020. [DOI: 10.1016/s1569-1993(20)30396-9] [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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Gursoy TR, Onay ZR, Aslan AT, Eyuboglu TS, Cakir E, Cobanoglu N, Pekcan S, Cinel G, Dogru D, Ozcelik U, Yalcin E, Sen V, Ercan O, Kilinç A, Yazan H, Altintas D, Esen D, Bingol A, Sapan N, Celebi E, Tugcu G, Ozdemir A, Harmanci K, Kose M, Emiralioglu N, Tamay Z, Yuksel H, Ozcan G, Topal E, Can D, Korkmaz P, Caltepe G, Kiliç M, Ozdogan S. P035 Comparison of clinical findings of the patients with cystic fibrosis in terms of diagnosed with and without neonatal screening. J Cyst Fibros 2020. [DOI: 10.1016/s1569-1993(20)30372-6] [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: 10/24/2022]
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Celiker M, Kanat A, Ozdemir A, Celiker FB, Kazdal H, Ozdemir B, Batcik OE, Ozdemir D. Controversy about the protective role of volume in the frontal sinus after severe head trauma: larger sinus equates with higher risk of death. Br J Oral Maxillofac Surg 2020; 58:314-318. [PMID: 31918887 DOI: 10.1016/j.bjoms.2019.12.008] [Citation(s) in RCA: 6] [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: 01/18/2019] [Accepted: 12/15/2019] [Indexed: 12/24/2022]
Abstract
The "crumple zone" hypothesis suggests that the paranasal sinuses protect the brain as a zone to distribute and absorb energy after trauma to the head. We investigated the relation between the size of the frontal sinus and mortality in patients with cranial trauma. All patients with head trauma admitted to the ICU between 1 January 2016 and 20 December 2017 were reviewed retrospectively. They were divided into two groups (according to their outcome) : died and survived. The volumes of the frontal sinuses and other trauma-related variables were assessed on computed tomographs (CT) on admission. Admission CT of 33 patients (24 male, and nine female, aged between 18-92 years, mean 43) were obtained. Male patients had significantly larger frontal sinuses than female (10.24 compared with 6.6cm3). Larger sinuses were significantly associated with a worse outcome (p=0.005). The size of the frontal sinus correlates with mortality after cranial trauma. Our findings do not confirm the "crumple zone" hypothesis, and suggest that the larger the sinus, the greater the risk of death. To our knowledge this is a new finding that warrants further validation.
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Affiliation(s)
- M Celiker
- Recep Tayyip Erdogan University, Medical Faculty, Department of Otorhinolaryngology, Rize, Turkey
| | - A Kanat
- Recep Tayyip Erdogan University, Medical Faculty, Department of Neurosurgery, Rize, Turkey.
| | - A Ozdemir
- Recep Tayyip Erdogan University Medical Faculty Department of Anesthesiology and Reanimation Rize, Turkey
| | - F B Celiker
- Recep Tayyip Erdogan University, Medical Faculty Department of Radiology, Rize, Turkey
| | - H Kazdal
- Recep Tayyip Erdogan University Medical Faculty Department of Anesthesiology and Reanimation Rize, Turkey
| | - B Ozdemir
- Recep Tayyip Erdogan University, Medical Faculty, Department of Neurosurgery, Rize, Turkey
| | - O E Batcik
- Recep Tayyip Erdogan University, Medical Faculty, Department of Neurosurgery, Rize, Turkey
| | - D Ozdemir
- University of Health Sciences -Samsun Health Practices and Research Center, Department of Otorhinolaryngology, Samsun, Turkey
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Sismanlar Eyuboglu T, Doğru Ersoz D, Cakır E, Cobanoglu N, Pekcan S, Cinel G, Yalcın E, Kiper N, Sen V, Selimoglu Sen H, Ercan O, Keskin O, Bilgic Eltan S, Muhammed Al Shadfan L, Yazan H, Altıntas D, Sasihuseyinoglu S, Sapan N, Cekic S, Cokugras H, Kılınc A, Ramaslı Gursoy T, Aslan A, Bingol A, Basaran A, Ozdemir A, Kose M, Hangul M, Emiralioglu N, Tugcu G, Yuksel H, Yılmaz O, Orhan F, Gayretli Aydın Z, Topal E, Tamay Z, Suleyman A, Can D, Bal C, Caltepe G, Ozcelik U. P323 Pseudo Bartter Syndrome: the most common complication in the Turkish National Cystic Fibrosis Registry. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30616-2] [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: 10/26/2022]
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Sismanlar Eyuboglu T, Dogru Ersoz D, Cakır E, Cobanoglu N, Pekcan S, Cinel G, Yalcın E, Kiper N, Sen V, Selimoglu Sen H, Ercan O, Keskin O, Bilgic Eltan S, Muhammed Al Shadfan L, Yazan H, Altıntas D, Sasihuseyinoglu S, Sapan N, Cekic S, Cokugras H, Kılınc A, Ramaslı Gursoy T, Aslan A, Bingol A, Basaran A, Ozdemir A, Kose M, Hangul M, Emiralioglu N, Tugcu G, Yuksel H, Yılmaz O, Orhan F, Gayretli Aydın Z, Topal E, Tamay Z, Suleyman A, Can D, Bal C, Caltepe G, Ozcelik U. P311 Clinical features of cystic fibrosis patients with chronic liver disease in the Turkish National Cystic Fibrosis Registry. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30604-6] [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: 10/26/2022]
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Altunal V, Yegingil Z, Tuken T, Depci T, Ozdemir A, Guckan V, Nur N, Kurt K, Bulur E. Optically stimulated luminescence characteristics of BeO nanoparticles synthesized by sol-gel method. RADIAT MEAS 2018. [DOI: 10.1016/j.radmeas.2018.08.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Madali B, Inan-Eroglu E, Ozdemir A, Dikmen D. Calorie estimation of adults in hunger and satiety conditions. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1415] [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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Ozdemir A, Erdivanli B, Sen A, Terzi S, Ozdemir B. Difficult Airway Management in A Pediatric Case with Infantile Hemangioma. J Emerg Med Case Rep 2018. [DOI: 10.5152/jemcr.2018.2165] [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: 11/22/2022]
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Ozdemir A, Altunal V, Kurt K, Depci T, Yu Y, Lawrence Y, Nur N, Guckan V, Yegingil Z. Thermoluminescence properties of Li2B4O7:Cu, B phosphor synthesized using solution combustion technique. Radiat Phys Chem Oxf Engl 1993 2017. [DOI: 10.1016/j.radphyschem.2017.08.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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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Ozdemir A, Dikmen D. SUN-P239: Effects of Dieting on Intra-Abdominal Fatness and Waist Circumference. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30390-4] [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: 11/24/2022]
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Nur N, Guckan V, Kizilkaya N, Depci T, Ahmedova C, Yucel A, Ozdemir A, Altunal V, Koc V, Yegingil Z. Determination of dosimetric properties of MgO doped natural amethyst samples. Appl Radiat Isot 2016; 116:150-6. [PMID: 27526353 DOI: 10.1016/j.apradiso.2016.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 05/21/2016] [Revised: 08/02/2016] [Accepted: 08/05/2016] [Indexed: 10/21/2022]
Abstract
In this paper, the thermoluminescence (TL) dosimetric characteristics of MgO doped natural amethyst samples (Mg-NA) are presented. The morphologies and chemical structures of the powder form samples were identified using XRD, FTIR, SEM, SEM mapping and EDX. Comparison of the TL intensities showed that 10wt% Mg-NA was nearly 150 times more sensitive than undoped amethyst and the main dosimetric properties proved that 10wt% Mg-NA may be a promising phosphor for clinical and radiotherapy purposes.
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Affiliation(s)
- N Nur
- Adiyaman University, Electrical Electronic Engineering, 02040 Adiyaman, Turkey
| | - V Guckan
- Cukurova University, Physics Department, Balcali, Saricam, 01330 Adana, Turkey
| | - N Kizilkaya
- Inonu University, Mining Engineering Department, 44280 Malatya, Turkey
| | - T Depci
- Inonu University, Mining Engineering Department, 44280 Malatya, Turkey.
| | - C Ahmedova
- Adiyaman University, Chemical Department, 02040 Adiyaman, Turkey
| | - A Yucel
- Inonu University, Mining Engineering Department, 44280 Malatya, Turkey
| | - A Ozdemir
- Cukurova University, Physics Department, Balcali, Saricam, 01330 Adana, Turkey
| | - V Altunal
- Cukurova University, Physics Department, Balcali, Saricam, 01330 Adana, Turkey
| | - V Koc
- Adiyaman University, Vocational School, Department of Metal Tech., 02040 Adiyaman, Turkey
| | - Z Yegingil
- Cukurova University, Physics Department, Balcali, Saricam, 01330 Adana, Turkey
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Ozdemir Z, Ozdemir A, Basim GB. Application of chemical mechanical polishing process on titanium based implants. Mater Sci Eng C Mater Biol Appl 2016; 68:383-396. [PMID: 27524033 DOI: 10.1016/j.msec.2016.06.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 04/26/2016] [Accepted: 06/01/2016] [Indexed: 11/17/2022]
Abstract
Modification of the implantable biomaterial surfaces is known to improve the biocompatibility of metallic implants. Particularly, treatments such as etching, sand-blasting or laser treatment are commonly studied to understand the impact of nano/micro roughness on cell attachment. Although, the currently utilized surface modification techniques are known to improve the amount of cell attachment, it is critical to control the level of attachment due to the fact that promotion of bioactivity is needed for prosthetic implants while the cardiac valves, which are also made of titanium, need demotion of cells attachment to be able to function. In this study, a new alternative is proposed to treat the implantable titanium surfaces by chemical mechanical polishing (CMP) technique. It is demonstrated that the application of CMP on the titanium surface helps in modifying the surface roughness of the implant in a controlled manner (inducing nano-scale smoothness or controlled nano/micro roughness). Simultaneously, it is observed that the application of CMP limits the bacteria growth by forming a protective thin surface oxide layer on titanium implants. It is further shown that there is an optimal level of surface roughness where the cell attachment reaches a maximum and the level of roughness is controllable through CMP.
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Affiliation(s)
- Z Ozdemir
- Ozyegin University, Faculty of Engineering, Mechanical Engineering Department, Nisantepe Mevki, Orman Sokak No: 26, Cekmekoy, Istanbul 34794, Turkey
| | - A Ozdemir
- TUBITAK Gebze Campus, Genetic Engineering and Biotechnology Institute, P.O Box 21, Gebze, Kocaeli 41470, Turkey
| | - G B Basim
- Ozyegin University, Faculty of Engineering, Mechanical Engineering Department, Nisantepe Mevki, Orman Sokak No: 26, Cekmekoy, Istanbul 34794, Turkey.
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Abstract
Cervical cancer (CC) is the most common gynaecological cancer during pregnancy. The rarity of the disease and lack of randomised control studies have prevented the establishment of treatment guidelines. The management of CC mainly follows the guidelines for the non-pregnant disease state, expert opinions and limited case reports. Although the management of CC diagnosed during pregnancy appears to be a significant dilemma for the patients and specialists, the prognosis of CC is not influenced by pregnancy. The treatment decision should be made collaboratively with a multidisciplinary team consisting of an obstetrician, gynaecologist, oncologist and paediatrician. The concerns of the patient should be taken into account.
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Affiliation(s)
- K Gungorduk
- a Department of Gynecologic Oncology , Tepecik Education and Research Hospital , Izmir , Turkey
| | - A Sahbaz
- b Department of Obstetrics and Gynecology , Bulent Ecevit University School of Medicine , Zonguldak , Turkey
| | - A Ozdemir
- a Department of Gynecologic Oncology , Tepecik Education and Research Hospital , Izmir , Turkey
| | - M Gokcu
- a Department of Gynecologic Oncology , Tepecik Education and Research Hospital , Izmir , Turkey
| | - M Sancı
- a Department of Gynecologic Oncology , Tepecik Education and Research Hospital , Izmir , Turkey
| | - M F Köse
- c Department of Gynecologic Oncology , Medipol University School of Medicine , İstanbul , Turkey
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Ozdemir A, Ibisolu B, Simay YD, Polat B, Ark M. [Ouabain induces Rho-dependent rock activation and membrane blebbing incultured endothelial cells]. Mol Biol (Mosk) 2015; 49:158-64. [PMID: 25916120 DOI: 10.7868/s0026898415010139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Small G protein Rho and its most studied effectors, ROCK I and ROCK II, are involved in several cellular fuctions including smooth muscle and non-muscle cell contractions, cell migration and apoptosis. Activation of ROCK I by caspase-3 and activation of ROCK II by granzyme B are essential for membrane blebbing in the execution phase of apoptosis. In contrast, it has been demonstrated that Rho signaling is critical for blebbing developed after serum removal. As it was shown by us previously, ouabain induces membrane blebbing and proteolitic cleavage of ROCK I and ROCK II via caspases in human umbilical endothelial cells. However, caspase inhibitors do not prevent ouabain-induced blebs. Ouabain induces concentration-dependent cell death and membrane blebbing in endothelial cells. The aim of this study was to identify the possible role of Rho in ouabain-induced membrane blebbing. Pretreatment of endothelial cells with a Rho inhibitor CT04 did not inhibit the ouabain-induced cell death but prevented the development ofbleb formation. These results indicate that bleb formation is dependent on Rho activity in ouabain-induced cell death in HUVECs. Taken together, these results suggest that the mechanism of membrane bleb formation might be different depending on cell type and cell death-stimuli.
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Sahin R, Nayki U, Ulug P, Nayki C, Gultekin E, Ozdemir A, Kaya B, Pilanci B, Ertopcu K, Yildirim Y. 302A. Cytoreductive surgery in advanced endometrial cancer: The impact of optimal cytoreduction and adjuvant treatment method. Eur J Surg Oncol 2014. [DOI: 10.1016/j.ejso.2014.08.293] [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] Open
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Ozdemir A, Ertas I, Gungorduk K, Kaya C, Solmaz U, Yildirim G. Uterine preservation in placenta percreta complicated by unscarred uterine rupture at second trimester in a patient with repeated molar pregnancies: a case report and brief review of the literature. CLIN EXP OBSTET GYN 2014. [DOI: 10.12891/ceog17112014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Varol I, Ozaslan M, Ozdemir A, Akan Z, Kutbay F. Two Species of Genus Xerolycosa (Araneae: Lycosidae) New to the Turkish Spider Fauna. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2006.10817307] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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24
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Kalayci F, Balcioglu I, Ozdemir A, Yuksel P, Alpay N, Ergin S, Kuskucu M, Kurt A, Aksoy Poyraz C, Bahar Tokman H, Kocazeybek B. The role of Chlamydophila pneumoniae in the etiopathogenesis of schizophrenia and brain-derived neurotrophic factor (BDNF), neurotrophins like neurotrophin 3 (NT3) levels: A worldwide retrospective study. Int J Infect Dis 2014. [DOI: 10.1016/j.ijid.2014.03.1123] [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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25
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Yildirim Y, Ertas IE, Nayki U, Ulug P, Nayki C, Yilmaz I, Gultekin E, Dogan A, Aykas A, Ulug S, Ozdemir A, Solmaz U. En-bloc pelvic resection with concomitant rectosigmoid colectomy and immediate anastomosis as part of primary cytoreductive surgery for patients with advanced ovarian cancer. EUR J GYNAECOL ONCOL 2014; 35:400-407. [PMID: 25118481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVE To assess the authors' experiences in en bloc pelvic resection with concomitant rectosigmoid colectomy and primary anastomosis as a part of primary cytoreductive surgery for patients with advanced ovarian cancer. MATERIALS AND METHODS Atotal of 22 patients with FIGO Stage IIB-IV epithelial ovarian cancer who underwent en bloc pelvic resection with anastomosis were retrospectively reviewed. Data analyses were carried out using SPSS 10.0 and descriptive statistics, Kaplan-Meier survival curves, and Log Rank (Mantel-Cox) test were used for statistical estimations. RESULTS Median age was 58.8 years. FIGO stage distribution of the patients was; one (4.5%) IIB, three (13.7%) IIC, three (13.7%) IIIA, six (27.3%) IIIB, and nine (40.9%) IIIC. Median peritoneal cancer index (PCI) was 8 (range 5-22) and optimal cytoreduction was achieved in 18 patients (81.8%) of whom 13 (59.1%) had no macroscopic residual disease (complete cytoreduction). There was no perioperative mortality. A total of nine complications occurred in seven (31.8%) patients. Anastomotic leakage was observed in one (4.5%) patient. There was no re-laparotomy. Mean follow-up time was 60 months. There were 15 (68.2%) recurrences of which 12 (80%) presented in extra-pelvic localizations. Mean disease-free survival (DFS) and overall survival (OVS) were estimated as 43.6 and 50.5 months, respectively. Patients with complete cytoreduction had a better DFS (p = 0.006) and OVS (p = 0.003) than those with incomplete cytoreduction. CONCLUSION En bloc pelvic resection, as a part of surgical cytoreduction, seems to be a safe and effective procedure in many patients with advanced ovarian cancer if required. Despite relatively high general complication rate, anastomosis-related morbidity of this procedure is low as 0.8%. Nevertheless, surgical plan and perioperative care should be personalized according to medical and surgical conditions of the patient.
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MESH Headings
- Adenocarcinoma/pathology
- Adenocarcinoma/surgery
- Adenocarcinoma, Clear Cell/pathology
- Adenocarcinoma, Clear Cell/surgery
- Adenocarcinoma, Mucinous/pathology
- Adenocarcinoma, Mucinous/surgery
- Adult
- Aged
- Anastomosis, Surgical
- Carcinoma, Endometrioid/pathology
- Carcinoma, Endometrioid/surgery
- Carcinoma, Ovarian Epithelial
- Cohort Studies
- Colectomy/methods
- Colon, Sigmoid/surgery
- Disease-Free Survival
- Female
- Humans
- Hysterectomy/methods
- Kaplan-Meier Estimate
- Lymph Node Excision
- Middle Aged
- Neoplasms, Glandular and Epithelial/pathology
- Neoplasms, Glandular and Epithelial/surgery
- Ovarian Neoplasms/pathology
- Ovarian Neoplasms/surgery
- Ovariectomy/methods
- Pelvic Exenteration/methods
- Peritoneum/surgery
- Proctocolectomy, Restorative/methods
- Rectum/surgery
- Retrospective Studies
- Treatment Outcome
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Ozdemir A, Ertas IE, Gungorduk K, Kaya C, Solmaz U, Yildirim G. Uterine preservation in placenta percreta complicated by unscarred uterine rupture at second trimester in a patient with repeated molar pregnancies: a case report and brief review of the literature. CLIN EXP OBSTET GYN 2014; 41:590-592. [PMID: 25864268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Placenta-percreta causing uterine rupture in unscarred uterus is a rare obstetric surgical emergency that can cause maternal and perinatal morbidity and mortality. A 25-year-old woman presented with abdominal pain for four days. Previously, she had undergone two suction curettages for complete hydatiform moles. Ultrasound revealed a non-viable fetus with an estimated gestational age of 21 weeks and free fluid and coagulum in the abdominal cavity. An emergency laparotomy was performed because of the acute abdomen. At exploration, the placenta had invaded the entire thickness of the myometrium and the non-viable fetus was in the abdominal cavity. The uterus was closed with a double-layer of interrupted sutures and uterine-sparing surgery was performed. The patient was discharged on postoperative day seven. The authors present a case of placenta-percreta in an unscarred uterus complicated with uterine rupture during the second-trimester that was managed successfully with uterine repair. They also review the literature briefly and discuss similar cases managed conservatively in the second-trimester.
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Turkmen F, Isitmangil G, Berber I, Arslan G, Sevinc C, Ozdemir A. Comparison of serum creatinine and spot urine interleukin-18 levels following radiocontrast administration. Indian J Nephrol 2012; 22:196-9. [PMID: 23087555 PMCID: PMC3459524 DOI: 10.4103/0971-4065.98756] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Radiocontrast administration is an important cause of acute renal failure. In this study, compared the plasma creatinine levels with spot urine IL-18 levels following radiocontrast administration. Twenty patients (11 males, 9 females) underwent radiocontrast diagnostic and therapeutic-enhanced examinations. The RIN Mehran risk score was low (≤5). The radiocontrast agents used were 623 mg/mL Iopromid (1.5 mL/kg), and 100 mL of 650 mg/mL meglumine diatrizoate as three-way oral and rectal contrast material for abdominal computed tomography (CT) scans. Serum blood urea nitrogen, creatinine, Na, K, Cl, Ca, P, creatinine clearance, and spot urine IL-18 levels were analyzed before and repeated at 24, 48, and 72 h after radiocontrast administration. Six and 24-h urinary IL-18 levels were measured with a human IL-18 ELISA kit following radiocontrast administration. An increase in plasma creatinine 24 and 48 h following radiocontrast administration was observed compared with precontrast values, but it was not statistically significant (P=0.052 and P=0.285, respectively). A statistically significant increase in IL-18 levels was observed at 6 and 24 h, compared with precontrast values (P=0.048 and P=0.028, respectively). A tendency for postcontrast 24-h urinary IL-18 levels to increase was observed compared with 6 h, but the increase was not statistically significant (P=0.808). Our results show that plasma creatinine starts to increase at 24th hour; however, spot urine IL-18 levels go up at 6th hour following radiocontrast administration implying urine IL-18 to be an earlier parameter for kidney injury.
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Affiliation(s)
- F Turkmen
- Department of Internal Medicine, Haydarpasa Numune Training and Research Hospital, Istanbul, Turkey
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Hiçsönmez U, Ereeş FS, Ozdemir C, Ozdemir A, Cam S. Determination of major and minor elements in the Malva sylvestris L. from Turkey using ICP-OES techniques. Biol Trace Elem Res 2009; 128:248-57. [PMID: 19083156 DOI: 10.1007/s12011-008-8270-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2008] [Accepted: 10/23/2008] [Indexed: 11/25/2022]
Abstract
In this work, Malva sylvestris var. mauritiana (L.) leaves were collected from different points in Muradiye region of Manisa-Turkey. The leaves were dissolved by wet digestion method using a mixture of mineral acid. Concentrations of Ag, Al, B, Ba, Bi, Ca, Cd, Co, Cr, Cu, Fe, K, La, Mg, Mn, Na, Ni, Pb, Sn, Sr, Sb, Si, Ti, U, Zn, and Zr in prepared solutions were determined by using inductively coupled plasma optical emission spectrometry (ICP-OES). High Ca (13,848 mg/kg) and Mg (1,936 mg/kg) concentrations were found at the leaves. Obtained values were compared with the internationally permitted (standard) values. The results of elements were analyzed statistically (analysis of variance test). For different leaf sizes, concentration factors were calculated.
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Affiliation(s)
- U Hiçsönmez
- Department of Chemistry, Celal Bayar University, Manisa, Turkey.
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Aksoy HM, Aksoy B, Portakal S, Ozdemir A. An uncommon location for accessory breast tissue: inner thigh. Eur J Plast Surg 2008. [DOI: 10.1007/s00238-008-0286-3] [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] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Duran M, Kara Y, Akyildiz GK, Ozdemir A. Antimony and heavy metals accumulation in some macroinvertebrates in the Yesilirmak River (N Turkey) near the Sb-mining area. Bull Environ Contam Toxicol 2007; 78:395-9. [PMID: 17618389 DOI: 10.1007/s00128-007-9183-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2007] [Accepted: 06/01/2007] [Indexed: 05/16/2023]
Affiliation(s)
- M Duran
- Faculty of Science and Arts, Department of Biology, University of Pamukkale, Denizli, 20070, Turkey.
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31
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Gürsu EM, Ozdemir A, Yalinbas B, Gürsu RU, Canbakan M, Güven B, Atasoyu EM, Keskin AT, Elçi A, Baru Y. The effect of icodextrin and glucose-containing solutions on insulin resistance in CAPD patients. Clin Nephrol 2007; 66:263-8. [PMID: 17063993 DOI: 10.5414/cnp66263] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
PURPOSE Peritoneal dialysis patients have particular risks with respect to their lipid status and hyperinsulinemia. The aim of this study was to investigate the relation between insulin resistance and the type of the peritoneal dialysis solution. MATERIALS 41 randomly selected non-diabetic patient cohort who were already under treatment with continuous ambulatory peritoneal dialysis (CAPD) and 10 healthy controls participated in the study. 24 of the 41 patients were using 3 standard 1.36% glucose solutions during the day and 1 hypertonic solution with 2.27% glucose dwell during the night (glucose group: mean age 45.54 +/- 16.67 years and median CAPD duration 16.5 months). The remaining 17 patients were using 3 standard 1.36% glucose solutions during the day and 1 icodextrin dwell during the night for 8-10 hours (icodextrin group: mean age 47.47 +/- 13.15 years, median duration of icodextrin use 6 months (range 2-20 months), and median CAPD duration 30 months). Insulin resistance (IR) was calculated according to the homeostasis model assesment (HOMA) formula: HOMA-IR = fasting glucose (mmol/l) x fasting insulin (microU/1/22.5. The HOMA cutoff point for diagnosis of insulin resistance was established with receiver-operating characteristic (ROC) curves. The patients were called HOMA-IR(+) if their HOMA scores were higher than cutoff value. RESULTS There were no significant differences between age, BMI, triglyceride, total and high-density lipoprotein (HDL) cholesterol, iron and ferritin, alanine aminotransferase, fibrinogen, intact parathyroid hormone, magnesium, hemoglobin and hematocrit levels of the 2 groups. The mean glucose levels of the groups were not different but fasting insulin levels and HOMA scores of the icodextrin group were significantly lower than the glucose group (10.15 +/- 6.87 vs. 18.11 +/- 13.15, p = 0.028, and 2.28 +/- 1.67 vs. 4.26 +/- 3.27, p = 0.027, respectively). The ratio of patients with low HOMA scores (cutoff = 2.511) were significantly higher in the icodextrin group than in the glucose group (71% vs 38%, p = 0.037). Other than fasting insulin and glucose levels, significantly positive correlation was found between HOMA score and BMI in both groups. With regression analysis, we found that the main parameters effecting HOMA score were BMI (p = 0.008) and triglyceride (p = 0.029) in the glucose group, but no parameters were found to affect HOMA score in icodextrin group. CONCLUSION These results suggest that insulin resistance is reduced in peritoneal dialysis patients using icodextrin-based dialysis fluid instead of glucose-based dialysis fluid.
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Affiliation(s)
- E M Gürsu
- Department of Internal Medicine, Haydarpasa Numune Education and Research Hospital, Istanbul, Turkey
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Abstract
AIM To investigate the effect of diabetes mellitus on the Achilles tendon, which may contribute to the long-term complications in the foot-ankle complex and to investigate the factors relating to its thickening. METHODS The study group included 55 patients (26 female and 29 male) with type 2 DM, while the control group included 34 non-diabetic people (13 female and 21 male). We matched the female and male DM patients with their respective control groups in terms of age, BMI, height and body weight. Clinical and biochemical tests, as well as ultrasonographic evaluations of the internal carotid artery and the Achilles tendon, were carried out to evaluate the complications of diabetes mellitus, and to compare the Achilles tendon thickness (ATT) between the study and the control groups. RESULTS In the female groups the Achilles tendon was significantly thicker in the diabetic patients than in their healthy controls (p<0.001). However, no difference was found in the ATT between the male diabetic patients and their male controls (p=0.74). The ATT correlated with the body mass index (BMI) (r=0.47, p=0.015) and body weight in diabetic female group (r=0.56, p=0.003). We also observed that the ATT values were higher in male DM patients with retinopathy (p=0.034) or neuropathy (p=0.019) compared to the male DM patients without these complications. CONCLUSIONS The ATT in type 2 female diabetic patients was found to be higher than their non-diabetic controls, but no significant difference could be found between type 2 diabetic male patients and their non-diabetic controls by US. Our results might indicate a possible impact of diabetes on the ATT depending upon gender, but other mechanisms may also contribute to thickening of Achilles tendon.
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Affiliation(s)
- M Akturk
- Department of Endocrinology, Gazi University, Faculty of Medicine, Ankara, Turkey.
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Akhan S, Ozdemir A, Ozkan F. P.274 Echinococcosis granulosus and hepatitis C infection in liver with major depression: a case report. J Clin Virol 2006. [DOI: 10.1016/s1386-6532(06)80454-3] [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] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Systemic lupus erythematosus (SLE) is an auto-immune disease which can affect multiple organs. It may also involve the pancreas and in rare cases may cause acute pancreatitis. The etiology of acute pancreatitis in SLE is a matter of controversy. We present a case diagnosed with SLE that developed acute pancreatitis while being treated with corticosteroids. During the course of the disease, pancreatic pseudocysts developed and were treated by percutaneous drainage. There are few reports in the literature about the therapy of acute pancreatitis and percutaneous drainage of pseudocysts in SLE. We discuss the pathogenesis and therapy for acute pancreatitis in SLE patients.
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Affiliation(s)
- A Ozenc
- Hacettepe University Faculty of Medicine, Department of General Surgery, Ankara, Turkey
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Ozdemir A, Karakoc D, Hamaloglu E, Kologlu M, Ozenc A. Laparoscopic splenectomy for haematological diseases. Acta Chir Belg 2004; 104:555-8. [PMID: 15571022 DOI: 10.1080/00015458.2004.11679613] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
PURPOSE To show the utility of laparoscopic splenectomy for hematologic diseases. PATIENTS AND METHODS Ten patients with hematologic diseases who were operated between February 1997 and October 1998 were analysed retrospectively. TECHNIQUE The operations were performed by four trocars, hilar vessels were divided by clips and bag was used for splenic retrival. RESULTS All operations were completed successfully. No accessory spleens were found. Intraoperative complication, other than a bag tear in one operation did not occur. Postoperative complications occurred in two patients. The first one was a portal vein thrombosis and the second one was a peritonitis. All patients responded hematologically to the operation. CONCLUSION With appropriate surgical technique and patient follow up, laparoscopic splenectomy is a safe, adventageous and efficaceus operation for hematologic diseases.
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Affiliation(s)
- A Ozdemir
- Department of general surgery, Hacettepe University School of Medicine, Ankara, Turkey
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Dinç E, Ozdemir A. Multivariate spectral calibration technique based on regression analysis for the quantitative multiresolution of a ternary mixture containing paracetamol, ascorbic acid and acetylsalicylic acid in effervescent tablets. Pharmazie 2004; 59:700-5. [PMID: 15497752] [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: 05/01/2023]
Abstract
Multivariate spectral calibration techniques based on regression analysis were established for the quantitative multiresolution of a ternary mixture containing parecetamol (PAR) ascorbic acid (AA) and acetylsalicylic acid (ASP) having closely overlapping spectra. The mathematical algorithms of multivariate spectral calibrations as namely tri-linear regression calibration (TLRC) and multi-linear regression calibration (MLRC) are based on the use of the linear regression equations at a three-wavelength set and a ten-wavelength set in the range of 215-305 nm. These calibration techniques do not require any chemical pre-treatment and a graphical procedure of the overlapping spectra. The mathematical content of TLRC and MLRC approaches were briefly formulated for the quantitative analysis of three- or multi-component mixtures. The applicability of the formulated calibration models were tested by analysing the various synthetic ternary mixtures consisting of these active compounds and then these models were applied to real pharmaceutical formulations. It was observed that TLRC and MLRC models give a successful quantitative multiresolution. The experimental results of these techniques were compared with each other as well as with those obtained by literature methods.
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Affiliation(s)
- E Dinç
- Department of Analytical Chemistry, Faculty of Pharmacy, University of Ankara, Tandoğan, Ankara, Turkey.
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Abstract
OBJECTIVES Recent studies have linked herpesviruses to severe types of periodontal disease, but no information exists on their relationship to periodontal abscesses. The present study determined the presence of human cytomegalovirus (HCMV) and Epstein-Barr virus type 1 (EBV-1) in periodontal abscesses and the effect of treatment on the subgingival occurrence of these viruses. MATERIAL AND METHODS Eighteen adults with periodontal abscesses participated in the study. Subgingival samples were collected from each patient with sterile curettes from an abscess-affected site and a healthy control site. HCMV and EBV-1 were identified by polymerase chain reaction at the time of the abscess and at 4 months after surgical and systemic doxycycline therapy. RESULTS HCMV was detected in 66.7% of periodontal abscess sites and in 5.6% of healthy sites (P=0.002). EBV-1 occurred in 72.2% of abscess sites but not in any healthy site (P<0.001). HCMV and EBV-1 co-infection was identified in 55.6% of the abscess sites. Posttreatment, HCMV and EBV-1 were not found in any study site. CONCLUSIONS HCMV and EBV-1 genomes are commonly found in periodontal abscesses. These data favor a model in which a herpesvirus infection of the periodontium impairs the host defense and serves as a platform for the entrance of bacterial pathogens into gingival tissue with subsequent risk of abscess development.
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Affiliation(s)
- I Saygun
- Department of Periodontology, Gülhane Military Medical Academy, Ankara, Turkey.
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Abstract
Parathyroid cysts are infrequent lesions of which most are non-functional. They are often misdiagnosed as thyroid cysts. Pre-operative diagnosis and differentiation from thyroid cysts is generally difficult. We hereby report a case that was admitted to the emergency room and was diagnosed as hypercalcemic crisis. The mass found during the neck examination was thought to be a thyroid nodule. A right total and left subtotal thyroidectomy was performed. Palpable thyroid nodule was diagnosed as cystic parathyroid adenoma postoperatively. When a cystic lesion is found in the neck of a patient, a pararthyroid cyst should be considered.
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Affiliation(s)
- H Altun
- Department of General Surgery, Hacettepe University Faculty of Medicine, Ankara, Turkey.
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Abstract
The synthesis of some triazoly-benzofuranamine derivatives starting from 2-chloro-N-(5-substituted-2,3-dihydro-3-benzofuryl)acetamides and 3-(aryloxyalkyl)-4-ethyl/phenyl-5-mercapto-1,2,4-triazoles is described. The chemical structures of the compounds were elucidated. The prepared compounds were tested for herbicidal activity.
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Affiliation(s)
- G Turan-Zitouni
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Anadolu, Eskişehir, Turkey.
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Abstract
The synthesis of some pyridinyliminothiazoline derivatives starting from N-pyridine-N'-phenyl thiourea and alpha-halogenoacetophenones is described. The chemical structures of the compounds were elucidated. The prepared compounds were tested for antimicrobial activity.
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Affiliation(s)
- G Turan-Zitouni
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Anadolu, Eskişehir, Turkey.
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Abstract
A case of mesenteric vein gas as a nonfatal complication of intestinal obstruction is reported. A 48-year-old woman presented postoperatively signs and symptoms of acute abdomen on the eighth day following a gastric pull-up surgery due to an oesophageal carcinoma. The abdominal tomography findings revealed dilated jejunal segments and free gas in the superior mesenteric vein and end branches of the portal vein in the left hepatic lobe. The patient underwent a second laparotomy with a provisional diagnosis of intestinal ischaemia. Intraoperative gross appearance of the intestines revealed no ischaemic finding, the pathology was the dense adhesions between the jejunal segments and previous incision site. On the basis of these findings, the operation was ended with adhesiolysis. One month after the operation, the patient was well, there were no complications. As the authors, we think that the main reason for portomesenteric gas is mucosal destruction and that these case may be followed conservatively as long as intestinal ischaemia is excluded.
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Affiliation(s)
- M Keskek
- Department of General Surgery, Hacettepe University Faculty of Medicine, Ankara, Turkey.
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Yavuz S, Ayabakan N, Dilek K, Ozdemir A. Renal dose dopamine in open heart surgery. Does it protect renal tubular function? J Cardiovasc Surg (Torino) 2002; 43:25-30. [PMID: 11803323] [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: 02/23/2023]
Abstract
BACKGROUND This prospective, randomized study assessed the effect of dopamine on renal tubular function in patients who had coronary artery bypass grafting. METHODS Two groups of patients with normal preoperative renal function were randomly divided into a dopamine group (n=11), who received dopamine in a dose of 2 mg/kg x min, and a control group (n=11), who received no treatment. Dopamine infusion was initiated 24 hours before the operation and was continued for 48 hours postoperatively. Measurements of renal function obtained 2 days before the operation were considered preoperative and were repeated on the 1st, 3rd, and 7th postoperative days. Urinary excretion of b2-Microglobulin (b2-M), considered a sensitive means for diagnosing proximal tubular damage, was measured during the early (day 3) and late (day 7) postoperative period. RESULTS There were no significant differences respect to the clearances of creatinine, osmotic, and free-water in the dopamine group compared with the control group (p>0.05). Urine microalbumin levels significantly increased on postoperative day 3 in both groups. During the early postoperative period, excretion of urine b2-M was significantly greater in the dopamine group than in the control group (p<0.05). CONCLUSIONS Consequently, in patients with normal preoperative renal and cardiac function scheduled for elective coronary artery bypass grafting, renal dose dopamine infusion alone may not provide sufficient protection on tubular function and increases renal tubular injury during the early postoperative period.
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Affiliation(s)
- S Yavuz
- Department of Cardiovascular Surgery, Bursa Yüksek Ihtisas Hospital, Bursa, Turkey
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Hillmann G, Krause S, Ozdemir A, Dogan S, Geurtsen W. Immunohistological and morphometric analysis of inflammatory cells in rapidly progressive periodontitis and adult periodontitis. Clin Oral Investig 2001; 5:227-35. [PMID: 11800435 DOI: 10.1007/s00784-001-0134-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The purpose of this study was to localize, characterize, and quantify in situ the inflammatory cells in the gingival connective tissue prior and subsequent to the initial therapy of ten patients with rapidly progressive periodontitis (RPP) and five patients with adult periodontitis (AP). Using immunohistological techniques, the amount of T lymphocytes, alphabeta-T lymphocytes, gammadelta-T lymphocytes, B lymphocytes, and plasma cells was determined at the beginning of the periodontal therapy (baseline) and at the time of periodontal surgery. Furthermore, the distribution of collagen types I, III, V, and VI was investigated using transmission electron microscopy. At baseline, patients with RPP revealed much higher numbers of inflammatory cells than patients with AP. During initial therapy of patients with RPP, the amount of T cells, alphabeta-T cells, and gammadelta-T cells was reduced significantly (P<0.05). Biopsies of patients with AP revealed a statistically significant reduction of all cell types, except alphabeta-T cells and gammadelta-T cells in the deep connective tissue. The transmission electron microscopy of biopsies from patients with RPP and AP with severe inflammation taken at baseline revealed that collagen types I and III were destroyed nearly completely in areas with leukocyte infiltration, whereas collagen types V and VI revealed a more pronounced labeling reaction. The results revealed that, during initial therapy, the amount of inflammatory cells was reduced significantly more in biopsies of patients with AP than in patients with RPP. At baseline, the inflamed gingival tissue consists mainly of collagen types V and VI in areas with infiltrates of inflammatory cells.
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Affiliation(s)
- G Hillmann
- Department of Conservative Dentistry and Periodontology, Dental School, Medical University of Hannover, Germany.
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Doğan A, Tunca Y, Ozdemir A, Sengül A, Imirzalioğlu N. The effects of folic acid application on IL-1beta levels of human gingival fibroblasts stimulated by phenytoin and TNFalpha in vitro: a preliminary study. J Oral Sci 2001; 43:255-60. [PMID: 11848192 DOI: 10.2334/josnusd.43.255] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Folic acid (FA), that is required for the integrity of gingival tissues, was found to decrease in patients using phenytoin (PHT). Interleukin-1 beta (IL-1beta) was reported to enhance the extracellular matrix synthesis in fibroblasts. The purpose of this study was to assess the role of FA supplementation on PHT-induced overgrowth by investigating its effect on IL-1beta production of human gingival fibroblasts induced by tumor necrosis factor alfa (TNFalpha) in cell culture. PHT (20 microg/ml), FA (20 or 40 ng/ml) + PHT, PHT + TNF (10 ng/ml), FA (20 or 40 ng/ml) + PHT + TNF, or only culture medium (control) was added to 24-well plates containing fibroblasts. After an incubation period of 72 h, culture medium and cells were harvested separately. Then, IL-1beta levels in cell lysate were measured using enzyme-linked immunosorbent assay. The cellular IL-1beta level in the PHT group was 1 pg/ml. In PHT + 20 or 40 ng/ml FA-added cultures, the results obtained respectively were 0.8 and 0.7 pg/ml, whereas the control group value was 0.7 pg/ml. IL-1beta level was 4 pg/ml in the cultures that PHT and TNFalpha were applied simultaneously (P < 0.05). When PHT and either 20 or 40 ng/ml FA were simultaneously added into TNFalpha-induced cultures, the IL-1beta levels were 1.8 and 1.3 pg/ml, respectively. IL-1beta level in gingival tissues might play a role in PHT-induced overgrowth by increasing in the gingival tissues, and FA application might play a role in decreasing gingival tissues. However, further studies are needed for a more complete understanding of PHT-induced gingival overgrowth at the cellular level.
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Affiliation(s)
- A Doğan
- Department of Periodontology, Faculty of Dentistry, Gazi University, Ankara, Turkey.
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Ozdemir K, Altunkeser BB, Daniş G, Ozdemir A, Uluca Y, Tokaç M, Telli HH, Gök H. Effect of the isolated left bundle branch block on systolic and diastolic functions of left ventricle. J Am Soc Echocardiogr 2001; 14:1075-9. [PMID: 11696831 DOI: 10.1067/mje.2001.115655] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [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: 11/22/2022]
Abstract
BACKGROUND We planned this study to evaluate the effects of left bundle branch block (LBBB) on systolic and diastolic functions of left ventricle (LV) that have not previously been investigated in detail. MATERIAL AND METHODS Forty-five cases diagnosed as isolated LBBB according to the standard electrocardiographic criteria (group I, mean age: 60 +/- 12 years) were taken as the case group and 65 cases with normal conduction system (group II, mean age 58 +/- 14 years) were taken as the control group. Echocardiography was performed to all patients and coronary angiography was performed to 21 patients in group I and 35 patients in group II. In addition to standard systolic and diastolic function parameters, isovolumetric relaxation time (IRT), isovolumetric contraction time (ICT), and ejection time (ET) were measured by echocardiography, and the myocardial performance index (MPI) [(IRT+ICT)/ET] was calculated. LV end-diastolic pressure was calculated for the patients undergoing coronary angiography. RESULTS In group I, LV end-systolic diameter was greater (3.1 +/- 0.4 cm vs 2.8 +/- 0.4 cm, P <.001) and ejection fraction was lower (64% +/- 6% vs 68% +/- 6%, P <.001) than those of group II. Rapid filling deceleration time and rate was markedly different in group I (respectively, 133 +/- 50 ms vs 166 +/- 24 ms, P <.001; 608 +/- 291 cm/s(2) vs 383 +/- 116 cm/s(2), P <.001). In addition, it was found that LBBB caused shortening of LV diastolic period and ET markedly (respectively, 347 +/- 116 ms vs 394 +/- 106 ms, P =.03; 255 +/- 40 ms vs 294 +/- 21 ms, P <.001) and prolongation of IRT and ICT (respectively; 124 +/- 36 ms vs 91 +/- 16 ms, 96 +/- 35 ms vs 38 +/- 9 ms, P <.001). The MPI was predominantly higher in group I (0.89 +/- 0.29 vs 0.40 +/- 0.06, P <.001). Invasively determined LV end-diastolic pressure was found higher in group I (14 +/- 3 mm Hg vs 10 +/- 3 mm Hg, P <.001). CONCLUSION A marked elevation of the LV MPI and end-diastolic pressure, parallel to changes of conventional echocardiographic parameters, in patients with isolated LBBB points out that LBBB causes marked deterioration on LV systolic and diastolic functions.
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Affiliation(s)
- K Ozdemir
- Department of Cardiology, Faculty of Medicine, Selçuk University, Konya, Turkey.
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Ozdemir A, Ozdemir H, Maral I, Konuş O, Yücel S, Işik S. Differential diagnosis of solid breast lesions: contribution of Doppler studies to mammography and gray scale imaging. J Ultrasound Med 2001; 20:1091-1102. [PMID: 11587016 DOI: 10.7863/jum.2001.20.10.1091] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
OBJECTIVE To assess the role of Doppler sonography when used in conjunction with mammography and gray scale sonography in differentiating solid breast lesions and to find out whether lesion size is a limiting factor for Doppler evaluation. METHODS One hundred twelve lesions (70 malignant and 42 benign) detected with mammography and sonography were prospectively examined with color, power, and pulsed Doppler sonography. Vascularity was analyzed morphologically (vessel location, form, and color tone) and semiquantitatively (by spectral indices) to determine the valuable diagnostic flow characteristics. The lesions were classified by 2 observers as benign or malignant on the basis of each diagnostic technique (namely, a combination of mammography and gray scale sonography, presence or absence of blood flow, morphologic flow analysis, and spectral flow analysis). The results were compared with the histologic diagnosis in 105 lesions and with the clinical and radiologic diagnosis after at least 2 years of follow-up in 7 lesions. RESULTS The sensitivity and specificity of the mammography-gray scale sonography combination were 98.6% and 76.2%, respectively. Neither morphologic nor spectral Doppler analysis proved to be successful on its own, however, information obtained from investigated morphologic and spectral flow features increased the specificity of mammography and gray scale sonography for lesions 10 mm and smaller (from 88.9% to 100%) and those larger than 10 mm (from 70% to 96.6%). CONCLUSIONS Our data show that Doppler sonography is a beneficial adjunct to mammography and gray scale sonography for solid breast lesions 10 mm and smaller and those larger than 10 mm.
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Affiliation(s)
- A Ozdemir
- Department of Radiology, University of Gazi, School of Medicine, Ankara, Turkey
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Ozdogan M, Hamaloglu E, Ozdemir A, Ozenc A. Antegrade jejunojejunal intussusception after Roux-en-Y esophagojejunostomy as an unusual cause of postoperative intestinal obstruction: report of a case. Surg Today 2001; 31:355-7. [PMID: 11321349 DOI: 10.1007/s005950170160] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Postoperative intestinal obstruction in adults is rarely caused by intussusception. A case of antegrade jejunojejunal intussusception that occurred after Roux-en-Y esophagojejunostomy is described, followed by a discussion of the literature on this unusual entity.
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Affiliation(s)
- M Ozdogan
- Department of General Surgery, Hacettepe University Medical School, Ankara, Turkey
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Abstract
A thermosensitive gel matrix was prepared by free radical copolymerization of N-isopropylacrylamide (NIPAM) with a boronic acid-carrying monomer (i.e. 4-vinylphenylboronic acid, VPBA). The synthesis of the gel was performed at 70 degrees C in an alcohol-water mixture, using azobisisobutyronitrile and methylenebisacrylamide as the initiator and the crosslinker, respectively. To produce thermosensitive gels with a higher diol-binding affinity, an amino-containing comonomer, N-[3-(dimethylamino)propyl]methacrylamide (DMAPM) was included in the gel formation recipe. Thermally reversible VPBA-NIPAM and VPBA-DMAPM-NIPAM gels with different swelling properties were obtained by changing the feed concentrations of VPBA and DMAPM. To test the usability of the produced gels as sorbents in nucleotide adsorption, beta-nicotinamide adenine dinucleotide (beta-NAD) was selected as a model biomolecule. Then the adsorption isotherm for beta-NAD was obtained at +4 degrees C in HEPES buffer medium with a pH of 8.5. The support material was in a highly swollen form under these conditions, due to its thermosensitive character. This property was then used to enhance beta-NAD adsorption onto the gel matrix. Equilibrium adsorption capacities up to 70 mg beta-NAD/g dry gel could be achieved with the thermosensitive support prepared with the 12.9 mol% VPBA feed. The gels produced with higher VPBA and DMAPM feed concentrations exhibited higher equilibrium adsorption capacities for beta-NAD.
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Affiliation(s)
- A Tuncel
- Hacettepe University, Chemical Engineering Department, Ankara, Turkey.
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Dener C, Bozoklu S, Bozoklu A, Ozdemir A. Adult intussusception due to a malignant polyp: a case report. Am Surg 2001; 67:351-3. [PMID: 11308002] [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: 02/19/2023]
Abstract
Intussusception is primarily a disease of childhood; only about 5 to 10 per cent of cases occur in adults. In contrast to childhood intussusception 90 per cent of adults have an associated pathologic process, usually a malignant lesion. Adult cases do not have the classical symptoms and diagnosis may be difficult. CT scan and barium studies are the most useful diagnostic methods. We report a very rare case of adult ileocecocolic intussusception caused by a pedunculated malignant polyp of the cecum and review the clinical features of intussusception.
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Affiliation(s)
- C Dener
- Department of Surgery, Fatih University School of Medicine, Ankara, Turkey
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Abstract
A 5-year-old boy with macrocephaly and mental retardation was referred for radiologic evaluation. After cranial CT and MR imaging, the diagnosis of mural type vein of Galen aneurysmal malformation was established by angiography. Two weeks later, preembolization angiography revealed complete thrombosis of the malformation. Although it is a very rare event, vein of Galen aneurysmal malformation may spontaneously thrombose following diagnostic angiography. Possible effects of contrast media on thrombosis were discussed.
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Affiliation(s)
- O L Konus
- Department of Radiology, Gazi University School of Medicine, Ankara, Turkey
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