1
|
Buhur A, Gürel Ç, Kuşçu GC, Yiğittürk G, Oltulu F, Karabay Yavaşoğlu NÜ, Uysal A, Yavaşoğlu A. Is losartan a promising agent for the treatment of type 1 diabetes-induced testicular germ cell apoptosis in rats? Mol Biol Rep 2023; 50:2195-2205. [PMID: 36565418 DOI: 10.1007/s11033-022-08172-9] [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] [Received: 10/27/2022] [Accepted: 12/01/2022] [Indexed: 12/25/2022]
Abstract
BACKGROUND Diabetes mellitus (DM) is common metabolic disease that poses a major risk to public health and fertility. Previous studies indicate that DM may cause male infertility by triggering oxidative stress and germ cell apoptosis in the testis. Due to the undesirable effects of known antidiabetic drugs, scientists have begun to investigate the use of alternative drugs to control infertility complications observed in men. In this context, present study aimed to investigate the possible antiapoptotic effect of losartan against DM-induced testicular germ cell apoptosis. METHODS AND RESULTS Expreimental DM model was induced by intraperitoneal injection of streptozocin (STZ, 55 mg/kg) to 28 rats, which were then randomly assigned to 4 groups; 1 mL saline solution was given to DM + saline group by oral gavage, 5 mg/kg/day oral losartan was given to DM + low-dose losartan, 20 mg/kg/day oral losartan was given to DM + mid-dose losartan and, 80 mg/kg/day oral losartan was given to DM + high-dose losartan group for 4 weeks. Bax, Bcl-2 and cleaved-Caspase 3 immunoexpression, terminal-deoxynucleotidyl transferase dutp nick end labeling (TUNEL), Annexin-V and Real Time PCR analyses performed to evaluate antiapoptotic effects of losartan on diabetic rats' testis. In addition, biochemical analyzes carried out to evaluate change in oxidative stress. CONCLUSION The results showed that losartan may have dose-related antiapoptotic effects on rats' testis via decreasing oxidative stress.
Collapse
Affiliation(s)
- Aylin Buhur
- Faculty of Medicine, Department of Histology and Embryology, Ege University, 35100, Izmir, Izmir, Turkey
| | - Çevik Gürel
- Faculty of Medicine, Department of Histology and Embryology, Ege University, 35100, Izmir, Izmir, Turkey. .,Faculty of Medicine, Department of Histology and Embryology, Harran University, Sanliurfa, Turkey.
| | - Gökçe Ceren Kuşçu
- Faculty of Medicine, Department of Histology and Embryology, Ege University, 35100, Izmir, Izmir, Turkey
| | - Gürkan Yiğittürk
- Faculty of Medicine, Department of Histology and Embryology, Muğla Sıtkı Kocman University, Muğla, Turkey
| | - Fatih Oltulu
- Faculty of Medicine, Department of Histology and Embryology, Ege University, 35100, Izmir, Izmir, Turkey
| | | | - Ayşegül Uysal
- Faculty of Medicine, Department of Histology and Embryology, Ege University, 35100, Izmir, Izmir, Turkey
| | - Altuğ Yavaşoğlu
- Faculty of Medicine, Department of Histology and Embryology, Ege University, 35100, Izmir, Izmir, Turkey
| |
Collapse
|
2
|
Oltulu F, Uysal A, Rouhrazi H, Kılıç KD, Çalık Kocatürk D, Öktem G. Zoledronik asit uygulamasının meme kanseri hücre hattı (mcf 7) kanser kök hücrelerinin üzerine otofaji gen seviyesindeki etkilerinin araştırılması. Ege Tıp Dergisi 2019. [DOI: 10.19161/etd.417985] [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: 11/23/2022] Open
|
3
|
Uslu S, Alaca N, Kilic KD, Uysal A, Kurtel H. The effects of aerobic exercise frequencies on liver fibrosis, α-fetoprotein and cytokeratin 19 in experimental type 2 diabetes-induced rats: an immunohistochemistry study. Biotech Histochem 2018; 93:615-622. [DOI: 10.1080/10520295.2018.1517898] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- S. Uslu
- Department of Histology and Embryology, Medeniyet University School of Medicine, Istanbul, Turkey
| | - N. Alaca
- Department of Physiotherapy, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - K. D. Kilic
- Department of Histology and Embryology, Ege University School of Medicine, Izmir, Turkey
| | - A. Uysal
- Department of Histology and Embryology, Ege University School of Medicine, Izmir, Turkey
| | - H. Kurtel
- Department of Physiology, Marmara University School of Medicine, Istanbul, Turkey
| |
Collapse
|
4
|
Akarca-Dizakar SO, Aktuğ H, Oltulu F, Öktem G, Yavaşoğlu A, Açikgöz E, Yiğittürk G, Demir K, Uysal A. Effects of sunitinib on immunoreactivity of vimentin, E-cadherin and S100 in kidneys of streptozotocin induced diabetic mice. Biotech Histochem 2018; 93:328-335. [PMID: 29652183 DOI: 10.1080/10520295.2018.1439532] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
Diabetes mellitus (DM) affects many organs including kidney. Tyrosine kinase can cause hypoglycemia and sunitinib is an inhibitor of tyrosine kinase. We investigated the possible effects of sunitinib on the kidney of streptozotocin (STZ) induced type 1 diabetic mice. We used 28 CD 1 type male mice divided into four groups of seven. Type 1 diabetes was induced by injection of STZ. Group 1 was the untreated control. Group 2 comprised non-diabetic mice + sunitinib. Both groups 1 and 2 exhibited normal blood glucose levels. Group 3 comprised STZ treated diabetic mice + saline. Group 4 were diabetic mice + sunitinib treatment. Kidneys were removed after 8 weeks. The immunoreactivities of vimentin, E-cadherin and S100 were assessed. Immunostaining of vimentin, E-cadherin and S100 was located in both the glomeruli and tubules of the kidney. We found that the number of vimentin and E-cadherin positive glomeruli and tubules were increased after sunitinib treatment compared to saline treated diabetic mice. The number of vimentin labeled tubules was decreased in the sunitinib treated group compared to diabetic + saline groups. Differences in the number of S100 positive tubules and glomeruli between groups 3 and 4 were not statistically significant. The effect of sunitinib on experimental diabetic mice appears to be related to levels of vimentin, E-cadherin and S100 in the glomeruli and tubules of the kidney, and sunitinib may protect against renal damage from DM.
Collapse
Affiliation(s)
- S O Akarca-Dizakar
- a Department of Histology and Embryology , Gazi University Medical Faculty , Ankara , Turkey
| | - H Aktuğ
- b Department of Histology and Embryology , Ege University Medical Faculty , İzmir , Turkey
| | - F Oltulu
- b Department of Histology and Embryology , Ege University Medical Faculty , İzmir , Turkey
| | - G Öktem
- b Department of Histology and Embryology , Ege University Medical Faculty , İzmir , Turkey
| | - A Yavaşoğlu
- b Department of Histology and Embryology , Ege University Medical Faculty , İzmir , Turkey
| | - E Açikgöz
- b Department of Histology and Embryology , Ege University Medical Faculty , İzmir , Turkey
| | - G Yiğittürk
- b Department of Histology and Embryology , Ege University Medical Faculty , İzmir , Turkey
| | - K Demir
- b Department of Histology and Embryology , Ege University Medical Faculty , İzmir , Turkey
| | - A Uysal
- b Department of Histology and Embryology , Ege University Medical Faculty , İzmir , Turkey
| |
Collapse
|
5
|
Oztutgan T, Demirer E, Tas D, Uysal A, Caliskan T, Kucukodaci Z, Ayten O, Okutan O, Kartaloglu Z. A comparative analysis of angiopoietin 2 immunohistochemical staining in various stages of lung cancer. Niger J Clin Pract 2018; 19:725-729. [PMID: 27811442 DOI: 10.4103/1119-3077.193406] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE The role of Angiopoietin 2 (Ang 2), which is necessary for tumor growth, extension, and metastasis is not fully elucidated. The presented study aimed to investigate the relationship between Ang 2 staining intensity, expression rate in tumor tissue, and the stage of lung cancer. MATERIALS AND METHODS Fifty cases of lung cancer (34 non-small and 16 small cell cases) were included in the study. Immunohistochemistry was done to evaluate Ang 2 staining intensity and expression rate in tumor and stromal cells of lung cancer tissue. RESULTS Ang 2 was positive for 45 (90%) cases and negative for five (10%) cases (P = 0.04). There was a significant correlation between Ang 2 expression rate of expression and the histologic type of lung cancer (P = 0.033). Ang 2 expression rate in tumor cells of cancer tissues diagnosed with adenocarcinoma was low. There was a significant correlation between Ang 2 expression rate in stromal cells of cancer tissue and the type of lung cancer (P = 0.021). Stromal cell expression rate of Ang 2 in adenocarcinoma was found to be low. CONCLUSIONS As a result, the relationship between lung cancer stage and Ang 2 was documented with this study and the expression rate was found to be lower in adenocarcinomas. By this analysis, we can suggest that angiopoietins may be used as an option for targeted treatment in lung cancer.
Collapse
Affiliation(s)
- T Oztutgan
- Department of Thoracic Medicine, Gumussuyu Military Hospital, Istanbul, Turkey
| | - E Demirer
- Department of Thoracic Medicine, GATA Haydarpasa Training Hospital, Istanbul, Turkey
| | - D Tas
- Department of Thoracic Medicine, GATA Haydarpasa Training Hospital, Istanbul, Turkey
| | - A Uysal
- Department of Thoracic Medicine, Yedikule Chest Disease Hospital, Istanbul, Turkey
| | - T Caliskan
- Department of Thoracic Medicine, GATA Haydarpasa Training Hospital, Istanbul, Turkey
| | - Z Kucukodaci
- Department of Pathology, GATA Haydarpasa Training Hospital, Istanbul, Turkey
| | - O Ayten
- Department of Thoracic Medicine, GATA Haydarpasa Training Hospital, Istanbul, Turkey
| | - O Okutan
- Department of Thoracic Medicine, GATA Haydarpasa Training Hospital, Istanbul, Turkey
| | - Z Kartaloglu
- Department of Thoracic Medicine, GATA Haydarpasa Training Hospital, Istanbul, Turkey
| |
Collapse
|
6
|
Özdedeli K, Aktuğ H, Oltulu F, Öktem G, Yavaşoğlu A, Açıkgöz E, Yiğittürk G, Demir K, Uysal A. Deneysel diabet modeli oluşturulan farelerde tirozin kinaz inhibitör uygulanımının testis dokusu üzerine olan etkilerinin pluripotensi kapasitesi ve hücre adezyonu özelinde araştırılması. Ege Tıp Dergisi 2017. [DOI: 10.19161/etd.344244] [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: 11/23/2022] Open
|
7
|
Cheung I, Campbell L, LeBel EP, Ackerman RA, Aykutoğlu B, Bahník Š, Bowen JD, Bredow CA, Bromberg C, Caprariello PA, Carcedo RJ, Carson KJ, Cobb RJ, Collins NL, Corretti CA, DiDonato TE, Ellithorpe C, Fernández-Rouco N, Fuglestad PT, Goldberg RM, Golom FD, Gündoğdu-Aktürk E, Hoplock LB, Houdek P, Kane HS, Kim JS, Kraus S, Leone CT, Li NP, Logan JM, Millman RD, Morry MM, Pink JC, Ritchey T, Root Luna LM, Sinclair HC, Stinson DA, Sucharyna TA, Tidwell ND, Uysal A, Vranka M, Winczewski LA, Yong JC. Registered Replication Report. Perspect Psychol Sci 2016; 11:750-764. [DOI: 10.1177/1745691616664694] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Finkel, Rusbult, Kumashiro, and Hannon (2002, Study 1) demonstrated a causal link between subjective commitment to a relationship and how people responded to hypothetical betrayals of that relationship. Participants primed to think about their commitment to their partner (high commitment) reacted to the betrayals with reduced exit and neglect responses relative to those primed to think about their independence from their partner (low commitment). The priming manipulation did not affect constructive voice and loyalty responses. Although other studies have demonstrated a correlation between subjective commitment and responses to betrayal, this study provides the only experimental evidence that inducing changes to subjective commitment can causally affect forgiveness responses. This Registered Replication Report (RRR) meta-analytically combines the results of 16 new direct replications of the original study, all of which followed a standardized, vetted, and preregistered protocol. The results showed little effect of the priming manipulation on the forgiveness outcome measures, but it also did not observe an effect of priming on subjective commitment, so the manipulation did not work as it had in the original study. We discuss possible explanations for the discrepancy between the findings from this RRR and the original study.
Collapse
|
8
|
Uludağ A, Uysal A, Uludağ A, Ertekin YH, Tekin M, Kütük B, Silan F, Özdemir Ö. Prevalence and mutations of β-thalassemia trait and abnormal hemoglobins in premarital screening in Çanakkale province, Turkey. Balkan J Med Genet 2016; 19:29-34. [PMID: 27785405 PMCID: PMC5026277 DOI: 10.1515/bjmg-2016-0004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The prevalence of β-thalassemia (β-thal) carriers in Turkey varies according to region but in general it is 2.0%. Çanakkale is a city in the Aegean region of Turkey but no study about β-thal frequency in Çanakkale has been published to date. In this study, we aimed to investigate the frequency of β-thal mutations in this province. A total of 4452 couples (8904 individuals) applied for premarital thalassemia scans at the Çanakkale State Health Directorate Laboratory between January 2008 and June 2012 and scanning was done with high performance liquid chromatography (HPLC). Of 125 β-thal carriers seen at the Medical Genetics Clinic, Çanakkale Onsekiz Mart University, Çanakkale, Turkey, for genetic counseling, 46 participated in the study. The remaining 79 patients could not be reached. The prevalence for β-thal carriers in Çanakkale was identified as 1.4% (125/8904). One couple were both β-thal carriers. β-Globin gene analysis of 46 carriers found the total frequency of the three most common mutations was 45.6%. These mutations were found to be HBB: c.93-21G>A [IVS-I-110 (G>A)], 26.08% (12/46); HBB: c.17_ 18delCT [codon 5 (‒CT)], 10.85% (5/46); HBB: c.20delA [codon 6 (‒A)] 8.69% (4/46). This is the first report on the frequency and mutation profiles of β-thal for Çanakkale. The incidence of β-thal carriers in Çanakkale is below the average for Turkey. The most frequently observed mutation profile and rate of β-thal in our region is different from the other regions of Turkey.
Collapse
Affiliation(s)
- A Uludağ
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - A Uysal
- Department of Obstetrics and Gynecology, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - A Uludağ
- Department of Family Medicine, Çanakkale Onsekiz Mart University, Çanakkale/Turkey
| | - Y H Ertekin
- Department of Family Medicine, Çanakkale Onsekiz Mart University, Çanakkale/Turkey
| | - M Tekin
- Department of Family Medicine, Çanakkale Onsekiz Mart University, Çanakkale/Turkey
| | - B Kütük
- Ministry of Health, Çanakkale Public Health Center, Çanakkale, Turkey
| | - F Silan
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - Ö Özdemir
- Department of Medical Genetics, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| |
Collapse
|
9
|
Bolat D, Oltulu F, Uysal A, Kose T, Gunlusoy B, Yigitturk G, Turk NS, Turan T. Effects of losartan on experimental varicocele-induced testicular germ cell apoptosis. Andrologia 2016; 48:840-6. [DOI: 10.1111/and.12638] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2016] [Indexed: 12/21/2022] Open
Affiliation(s)
- D. Bolat
- Department of Urology; Bozyaka Training and Research Hospital; Izmir Turkey
| | - F. Oltulu
- Department of Histology and Embryology; Ege University Faculty of Medicine; Izmir Turkey
| | - A. Uysal
- Department of Histology and Embryology; Ege University Faculty of Medicine; Izmir Turkey
| | - T. Kose
- Department of Biostatistics; Ege University Faculty of Medicine; Izmir Turkey
| | - B. Gunlusoy
- Department of Urology; Bozyaka Training and Research Hospital; Izmir Turkey
| | - G. Yigitturk
- Department of Histology and Embryology; Ege University Faculty of Medicine; Izmir Turkey
| | - N. S. Turk
- Department of Pathology; Pamukkale University Faculty of Medicine; Denizli Turkey
| | - T. Turan
- Department of Urology; Pamukkale University Faculty of Medicine; Denizli Turkey
| |
Collapse
|
10
|
Gazi E, Gencer M, Temiz A, Barutcu A, Altun B, Gungor ANC, Hacivelioglu S, Uysal A, Cosar E. Does pregnancy-induced hypertension affect the electrophysiology of the heart? J OBSTET GYNAECOL 2015; 36:183-6. [PMID: 26366512 DOI: 10.3109/01443615.2015.1036401] [Citation(s) in RCA: 3] [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] [Indexed: 01/19/2023]
Abstract
Pregnancy-induced hypertension (PIHT) increases both maternal and neonatal mortality and morbidity in pregnant women. We sought to investigate the electrocardiographic findings in pregnant women with PIHT. Seventeen pregnant women (29.4 ± 5 years) with PIHT and 24 pregnant women (27.3 ± 6.1 years) with normal blood pressure (control group) were included in the study. A 12-lead surface electrocardiogram was used to evaluate the electrocardiographic parameters. Pregnant women with PIHT had higher blood pressure (p = 0.001). The Tp-e interval was longer in PIHT pregnant women at 83.5 ± 7.8 ms versus 75.8 ± 8.4 ms in the control group (p = 0.007). The Tp-e/QTc ratio was higher in pregnant women with PIHT than that in healthy controls (0.19 ± 0.02 vs. 0.18 ± 0.02, respectively). This study demonstrated that Pd, QTd and the P wave durations were similar in the PIHT pregnant women and control group, but the Tp-e and Tp-e/QTc ratio were higher in pregnant women with PIHT than in normotensive pregnant women.
Collapse
Affiliation(s)
- E Gazi
- a Department of Cardiology , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - M Gencer
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - A Temiz
- a Department of Cardiology , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - A Barutcu
- a Department of Cardiology , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - B Altun
- a Department of Cardiology , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - A N C Gungor
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - S Hacivelioglu
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - A Uysal
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| | - E Cosar
- b Department of Gynecology and Obstetrics , Faculty of Medicine, Çanakkale Onsekiz Mart University , Çanakkale , Turkey
| |
Collapse
|
11
|
Tosun Tasar P, Sahin S, Keklik F, Uysal A, Gulsah Ulusoy M, Duman S, Akcicek F. P-372: Assessment of vitamin D levels in geriatric patients in the university hospital. Eur Geriatr Med 2015. [DOI: 10.1016/s1878-7649(15)30469-1] [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: 10/23/2022]
|
12
|
Hacivelioglu S, Uysal A, Gungor AC, Gencer M, Cakir D, Cosar E. The effect of maternal polycystic ovary morphology on first-trimester maternal serum biochemical markers of aneuploidy and fetal nuchal translucency thickness. CLIN EXP OBSTET GYN 2015. [DOI: 10.12891/ceog1703.2015] [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: 11/01/2022]
|
13
|
Hacivelioglu S, Uysal A, Gungor ANC, Gencer M, Cakir DU, Cosar E. The effect of maternal polycystic ovary morphology on first-trimester maternal serum biochemical markers of aneuploidy and fetal nuchal translucency thickness. CLIN EXP OBSTET GYN 2015; 42:32-35. [PMID: 25864278] [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
OBJECTIVE To evaluate the effect of maternal polycystic ovary (PCO) morphology on maternal serum free beta-human chorionic gonadotropin (β-hCG), pregnancy associated plasma protein A (PAPP-A), and nuchal translucency (NT) thickness in the first-trimester. MATERIAL AND METHODS A total of 92 pregnant women in the first-trimester were included in the study. Of them, 57 had PCO morphology, and 35 women constituted the control group, with apparently normal ovaries. Maternal serum free β-hCG, PAPP-A, and NT thickness were measured and compared in all patients. RESULTS The multiples of median (MoM) levels of serum free β-hCG were significantly higher in the PCO morphology group compared to the normal ovary group (p = 0.024). However, the MoM levels of PAPP-A were similar in both groups (p = 0.947). No difference was found between the groups in terms of fasting glucose levels and NT measurements (p = 0.976 and 0.565, respectively). CONCLUSION In pregnancies with maternal PCO morphology, the presence of higher maternal serum free β-hCG levels may require correction in the calculation of risks related to first-trimester screening for chromosomal abnormalities. Larger studies are needed to confirm our preliminary data.
Collapse
|
14
|
Uysal A, Sahna E, Ozguler IM, Burma O, Ilhan N. Effects of apocynin, an NADPH oxidase inhibitor, on levels of ADMA, MPO, iNOS and TLR4 induced by myocardial ischemia reperfusion. Perfusion 2014; 30:472-7. [PMID: 25404055 DOI: 10.1177/0267659114559260] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
PURPOSE In this study, the effects of apocynin, an NADPH oxidase inhibitor, on the levels of inducible nitric oxide synthase (iNOS) and the toll-like receptor 4 (TLR4), which are inflammatory mediators in myocardial ischemia-reperfusion (MIR) injury, and myeloperoxidase (MPO), which is the indicator of neutrophil infiltration and the endogenous nitric oxide synthase inhibitor asymmetric dimethyl arginine (ADMA) increasing with oxidative stress were investigated. METHODS MIR injury was accomplished by the application of occlusion for 30 minutes and reperfusion for 120 minutes in the left anterior descending artery (LAD). In the study, 21 Sprague-Dawley male rats were divided into three groups: a sham group (n = 7); a MIR group (n = 7); and a MIR + apocynin treatment group (n = 7, before the procedure, an intraperitoneal administration of 10 mg/kg of apocynin for 15 days). After reperfusion, iNOS, TLR4, MPO and ADMA levels in myocardial tissue were measured by ELISA. RESULTS While myocardial TLR4, MPO and ADMA levels increased in the MIR group, these parameters were found to be decreased significantly in the group treated with apocynin. Although iNOS levels showed an increase in the MIR group compared to the sham group and a reduction in the MIR+apocynin group, there was no statistically significant difference between the groups. DISCUSSION In our study, the effect of the treatment of apocynin in MIR on ADMA, MPO, iNOS and TLR4 levels in myocardial tissue was shown for the first time. It is thought that apocynin treatment may show a protective effect in MIR injury by affecting oxidative stress (ADMA) and inflammatory parameters (iNOS, MPO).
Collapse
Affiliation(s)
- A Uysal
- Depertment of Cardiovascular Surgery, Faculty of Medicine, Firat University, Elazig, Turkey
| | - E Sahna
- Depertment of Pharmacology, Faculty of Medicine, Firat University, Elazig, Turkey
| | - I M Ozguler
- Depertment of Cardiovascular Surgery, Faculty of Medicine, Firat University, Elazig, Turkey
| | - O Burma
- Depertment of Cardiovascular Surgery, Faculty of Medicine, Firat University, Elazig, Turkey
| | - N Ilhan
- Depertment of Biochemistry, Faculty of Medicine, Firat University, Elazig, Turkey
| |
Collapse
|
15
|
Oltulu F, Aktug H, Uysal A, Turgan N, Oktem G, Erbas O, Yavasoglu NK, Yavasoglu A. Immunoexpressions of embryonic and nonembryonic stem cell markers (Nanog, Thy-1, c-kit) and cellular connections (connexin 43 and occludin) on testicular tissue in thyrotoxicosis rat model. Hum Exp Toxicol 2014; 34:601-11. [PMID: 25304966 DOI: 10.1177/0960327114551392] [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: 11/15/2022]
Abstract
In this study, possible thyrotoxicosis-related histological changes in testicular tissues of rats with experimentally induced thyrotoxicosis model were evaluated on cellular connections and stem cell markers. Two experimental groups, thyrotoxicosis and control, each consisting of eight animals were used. Rats in the thyrotoxicosis group were injected intraperitoneally with 3,3',5-triiodo-l-thyronine (50 µg/100 g body weight/day) for 10 days. At the end of the study, animals in both groups were anesthetized, and blood samples were collected for biochemical analyses. Their testes were dissected out and histological procedure was conducted to perform further histochemical, immunohistochemical analyses and tissue expression analysis by real-time polymerase chain reaction. Expression of the stem cell markers such as c-kit and Thy-1 significantly decreased in the testes of the thyrotoxicosis group compared with the control group; however, Nanog expression was not detected in any of the groups. Similarly, connexin 43 and occludin expressions were also found to be significantly lower in the thyrotoxicosis group. These results on cellular connections are supported with the tissue expression analysis. Our findings are indicative of supporting microenvironmental tissue decay rather than parenchyma damage, which has been actually ignored in the literature. In conclusion, experimental thyrotoxicosis model may have adverse effects on the cell junctional complexes, cell-cell interactions, and pluripotency capacity.
Collapse
Affiliation(s)
- F Oltulu
- Department of Histology and Embryology, Merkez Efendi Hospital, Manisa, Turkey
| | - H Aktug
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - A Uysal
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - N Turgan
- Department of Biochemistry, Faculty of Medicine, Ege University, Izmir, Turkey
| | - G Oktem
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - O Erbas
- Department of Physiology, Faculty of Medicine, Ege University, Izmir, Turkey
| | | | - A Yavasoglu
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Izmir, Turkey
| |
Collapse
|
16
|
Uysal A, Comert M, Sahin F, Tombuloglu M, Saydam G. PP-114 RELAPSE/REFRACTORY MYELOMA AND CARFILZOMIB. Leuk Res 2014. [DOI: 10.1016/s0145-2126(14)70168-7] [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: 12/01/2022]
|
17
|
Uysal A, Comert M, Ozsan N, Omur O, Saydam G, Sahin F. PP-115 ATYPICALLY LOCALIZED HODGKIN’S LYMPHOMA. Leuk Res 2014. [DOI: 10.1016/s0145-2126(14)70169-9] [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: 10/24/2022]
|
18
|
Savas S, Uysal A, Sarac F, Akcicek F. P275: Physical activity and bone mineral density. Eur Geriatr Med 2014. [DOI: 10.1016/s1878-7649(14)70446-2] [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: 11/30/2022]
|
19
|
Oktem G, Sercan O, Guven U, Uslu R, Uysal A, Goksel G, Ayla S, Bilir A. Cancer stem cell differentiation: TGFβ1 and versican may trigger molecules for the organization of tumor spheroids. Oncol Rep 2014; 32:641-9. [PMID: 24927163 DOI: 10.3892/or.2014.3252] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 02/26/2014] [Indexed: 11/06/2022] Open
Abstract
Cancer stem cells (CSCs) have the ability to self-renew similar to normal stem cells. This process is linked with metastasis and resistance to chemotherapy and radiotherapy. In the present study, we constructed an in vitro differentiation model for CSCs. CSCs isolated and proliferated for one passage were maintained as monolayers or spheroid-forming cells with serum included media for differentiation process. Differentiation of adhesion molecules and cellular ultrastructural properties were investigated and compared in both monolayer and spheroid cultures. CD133+/CD44+ cancer-initiating cells were isolated from DU-145 human prostate cancer cell line monolayer cultures and propagated as tumor spheroids and compared with the remaining heterogeneous cancer cell bulk population. Microarray-based gene expression analysis was applied to determine genes with differential expression and protein expression levels of candidates were analyzed by immunohistochemistry. Electron microscopy showed detailed analysis of morphology. TGFβ1 was found to be significantly upregulated in monolayer CSCs. High expression levels of VCAN, COL7A1, ITGβ3, MMP16, RPL13A, COL4A2 and TIMP1 and low expression levels of THBS1, MMP1 and MMP14 were detected when CSCs were maintained as serum-grown prostate CSC spheroids. Immunohistochemistry supported increased immunoreactivity of TGFβ1 in monolayer cultures and VCAN in spheroids. CSCs were found to possess multipotential differentiation capabilities through upregulation and/or downregulation of their markers. TGFβ1 is a triggering molecule, it stimulates versican, Col7A1, ITGβ3 and, most importantly, the upregulation of versican was only detected in CSCs. Our data support a model where CSCs must be engaged by one or more signaling cascades to differentiate and initiate tumor formation. This mechanism occurs with intracellular and extracellular signals and it is possible that CSCc themselves may be a source for extracellular signaling. These molecules functioning in tumor progression and differentiation may help develop targeted therapy.
Collapse
Affiliation(s)
- G Oktem
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Bornova 35100, Izmir, Turkey
| | - O Sercan
- Department of Medical Biology, Faculty of Medicine, Dokuz Eylul University, Narlidere 35340, Izmir, Turkey
| | - U Guven
- Department of Stem Cell, Ege University Institute of Health Science, Bornova 35100, Izmir, Turkey
| | - R Uslu
- Department of Medical Oncology, Faculty of Medicine, Ege University, Bornova 35100, Izmir, Turkey
| | - A Uysal
- Department of Histology and Embryology, Faculty of Medicine, Ege University, Bornova 35100, Izmir, Turkey
| | - G Goksel
- Department of Medical Oncology, Faculty of Medicine, Celal Bayar University, Manisa 45030, Turkey
| | - S Ayla
- Department of Obstetrics and Gynecology, Zeynep Kamil Gynecology and Maternity Training and Research Hospital, Istanbul 34668, Turkey
| | - A Bilir
- Department of Histology and Embryology, Emine-Bahaeddin Nakiboglu Medical Faculty, Zirve University, Gaziantep 27100, Turkey
| |
Collapse
|
20
|
Çöloğlu H, Özkan B, Çöloğlu Ö, Yalçınkaya C, Uysal A, Borman H. Salvage Surgery of the Limb with Severe Pseudoamniotic Band Syndrome: Case Report and Literature Review. HANDCHIR MIKROCHIR P 2014; 46:121-4. [DOI: 10.1055/s-0033-1358452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- H. Çöloğlu
- Plastic and Reconstructive Surgery, Baskent University Faculty of Medicine, Adana, Turkey
| | - B. Özkan
- Plastic and Reconstructive Surgery, Baskent University Faculty of Medicine, Adana, Turkey
| | - Ö. Çöloğlu
- Pediatric Surgery, Cukurova University Faculty of Medicine, Adana, Turkey
| | - C. Yalçınkaya
- Gynecology, Obstetrics and Neonatology, Baskent University Faculty of Medicine, Adana, Turkey
| | - A. Uysal
- Plastic and Reconstructive Surgery, Baskent University Faculty of Medicine, Adana, Turkey
| | - H. Borman
- Plastic and Reconstructive Surgery, Baskent University Faculty of Medicine, Adana, Turkey
| |
Collapse
|
21
|
Yavuzkır M, Kurtoğlu E, Yılmaz M, Korkmaz H, Çakmak T, Uysal A, Özguler M, Güler A, Akbulut M. OP-221 Relationship Between Mean Platelet Volume Elevatıon And Left Ventrıcular Mass Index in Hypertensive Patients. Am J Cardiol 2014. [DOI: 10.1016/j.amjcard.2014.01.120] [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: 11/26/2022]
|
22
|
Yavuzkır M, Uysal A, Özgüler M, Cakmak T, Güler A, Harman M. OP-211 Six-Month Follow-Up Results of our Slow Pathway Ablation Applied Cases due to Atrioventricular Nodal Reentrant Tachycardia. Am J Cardiol 2014. [DOI: 10.1016/j.amjcard.2014.01.110] [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]
|
23
|
Uslu S, Uysal A, Bilir A, Soner BC, Oktem G. Hepatic progenitor cell inhibition during embryonic period with high dose verapamil; liable joint to the cancer therapy. ACTA ACUST UNITED AC 2014; 114:369-75. [PMID: 23822619 DOI: 10.4149/bll_2013_079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cancer stem cells (CSCs) have been observed to share certain characteristics with normal stem cells. It was an important argument for cancer therapy and a successful progenitor inhibition could show us targeted cell type for a novel strategy. In this study, we aimed to constitute an inhibition in different stages of hepatic stem/progenitor cells (HPCs) with verapamil. Expression patterns of alpha-fetoprotein (AFP), c-kit (CD117) and p-glycoprotein were investigated in developing mouse on the embryonic day (E) 15, E18 and E21 to characterize early and late stages of HPCs. Proliferation inhibition with 5-Bromo-2-Deoxyuridin (BrdU) incorporation and maturation inhibition with PAS staining results were supported by morphometrical analysis during these periods. AFP, c-kit and p-glycoprotein immunoreactivity increased especially in E15 but decreased in E18 and E21 of the control groups during embryonic development. Verapamil treatment effected particularly E15 cells and immunoexpression of HPCs significantly decreased. Proliferation inhibition was observed in all embryonic days of mouse with verapamil and this drug inhibited not only maturation of HPCs in E18 and E21 embryos, but also decreased HPC number in the same embryonic period. According to our results, we estimated that similar to the early and late progenitor stages of HPCs, CSCc can also be in different stages in a heterogenic tumour bulk and the difficulty of CSC inhibition could be the main mechanism of tumour relapses. In this study, HPCs inhibition by verapamil in E15 was not observed in E18 and E21. As similar, CSCs treatments targeting different stages may be impotent to cells in tumour initiating cell stage. We can speculate that ineffectiveness of CSC-specific therapies may be attributed to the highly selective specificity of the treatment (Fig. 6, Ref. 28).
Collapse
Affiliation(s)
- S Uslu
- The School of Associated Health Sciences, Acibadem University, Turkey
| | | | | | | | | |
Collapse
|
24
|
Coşar E, Gencer M, Hacivelioğlu SO, Güngör AC, Uysal A. HPV and HPV vaccination: knowledge and consciousness of young women. EUR J GYNAECOL ONCOL 2014; 35:554-556. [PMID: 25423703] [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
AIM The aim of the study was to explore the knowledge and the awareness of the young Turkish women regarding cervical cancer and human papilloma virus (HPV) vaccines. The authors analyze a probable relationship between the overall knowledge level and a few socio-demographic parameters. MATERIALS AND METHODS The authors interviewed with students from Canakkale 18 March University and young women that did not continue with school in the same city from January to September 2011. All the students answered the questionnaire voluntarily and independently. RESULTS The participants had low level of knowledge about the risk factors for cervical cancer. Smoking is the major risk factor that was known by the participants (65%). Proportion of the participants that were aware of pap smear test and HPV were 65% and 17% respectively. A small proportion of young women had knowledge regarding protection from HPV. Educational stream, educational level, family income, and family size had significant association knowledge level (p < 0.05). CONCLUSION There has not been any improvement in HPV and risk factor of cervical cancer awareness in young women. Health members of the National Cancer Control Programme and delegates of the vaccine corporations have major work in order to increase the level of knowledge so that general public can easily take preventative measures.
Collapse
|
25
|
Uysal A, Savas S, Sarac F, Sever A, Elmas N, Akcicek F. The frequency of hiatal hernia in patients with complaints of upper gastrointestinal system over the age of 50, Izmir experience. Eur Geriatr Med 2013. [DOI: 10.1016/j.eurger.2013.07.487] [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]
|
26
|
Aktuğ H, Bozok Çetintaş V, Uysal A, Oltulu F, Yavaşoğlu A, Akarca SÖ, Kosova B. Evaluation of the Effects of STZ-Induced Diabetes on In Vitro Fertilization and Early Embryogenesis Processes. J Diabetes Res 2013; 2013:603813. [PMID: 23671879 PMCID: PMC3647572 DOI: 10.1155/2013/603813] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 02/12/2013] [Accepted: 02/25/2013] [Indexed: 01/23/2023] Open
Abstract
The aim of this study was to investigate the effects of experimentally induced diabetes on (a) germ cells, (b) in vitro fertilization (IVF) success rate, and (c) gap junction and cell adhesion molecule gene and protein expressions during the early blastocyst period. Germ cells were obtained from healthy and diabetic rats, analyzed for number, motility, and morphology, and used for IVF. After reaching the early blastocyst stage, the expressions of genes encoding gap junction proteins and cell adhesion molecules were analyzed by quantitative RT-PCR. Histomorphologically and immunohistochemically analyses were also performed. Diabetes significantly affected sperm number and motility and the development of oocytes. Gene expressions of β -catenin and connexin family members and protein expressions of E-cadherin and connexin-43 significantly decreased in groups including germ cells isolated from diabetic rats. Connective tissue growth factor expression increased in groups that included sperm cells isolated from diabetic male rats, whereas mucin-1 expression increased in the group that included oocytes isolated from diabetic female rats paired with sperm cells isolated from healthy male rats. In summary, experimentally induced diabetes was found to influence gap junctions, cell adhesion molecules, and associated proteins which all have important roles in germ cell maturation, fertilization, and development.
Collapse
Affiliation(s)
- Hüseyin Aktuğ
- Department of Histology and Embryology, Ege University Medical School, 35100 Izmir, Turkey
- *Hüseyin Aktuğ:
| | | | - Ayşegül Uysal
- Department of Histology and Embryology, Ege University Medical School, 35100 Izmir, Turkey
| | - Fatih Oltulu
- Department of Histology and Embryology, Ege University Medical School, 35100 Izmir, Turkey
| | - Altuğ Yavaşoğlu
- Department of Histology and Embryology, Ege University Medical School, 35100 Izmir, Turkey
| | - Saadet Özen Akarca
- Department of Histology and Embryology, Ege University Medical School, 35100 Izmir, Turkey
| | - Buket Kosova
- Department of Medical Biology, Ege University Medical School, 35100 Izmir, Turkey
| |
Collapse
|
27
|
Abstract
BACKGROUND Caregiving across different cultures has been perceived conventionally as a private or family responsibility, predominantly performed by women who accept their caregiving as part of their gender role. AIM This study aimed to design, deliver, and evaluate an elderly training programme for women by assessing their knowledge, attitudes and skills as a lay caregiver. Encouraging the women to find suitable positions for employment in private or governmental institutions was the further objective of the study. DESIGN The study was a quasi-experimental one-group pre-test post-test design. METHODS The study was conducted in a solidarity centre for women and in a nursing home for the elderly. The sample covered 120 women selected from the community by convenience sampling. Data were gathered through pre- and post-test evaluation and observation forms in 2 May-22 December 2005. The training programme consisted of 230 h of didactic sessions, demonstrations and clinical practices. FINDINGS The mean change in the participants' knowledge score (pre-test: 41.44 +/- 0.92; post-test: 71.16 +/- 1.34) demonstrated a statistically significant improvement in their knowledge. According to clinical observations, most of them displayed satisfactory caring and communication skills towards the elderly. Virtually all participants reported increased skill, knowledge and confidence. CONCLUSION The developed training programme was effective, resulting in an increased knowledge, the acquisition of good attitudes towards the elderly, and performing satisfactory caring and communication skills. Similar community-based programmes managed by nurses are recommended to support non-professional caregivers. The research is not only an innovative but also a revolutionary model to promote women.
Collapse
Affiliation(s)
- T A Bayik
- Department of Public Health Nursing, School of Nursing, Ege University, 35100 Bornova-Izmir, Turkey
| | | |
Collapse
|
28
|
Uysal A, Demirel G, Turan E, Çaykara T. Hemoglobin recognition of molecularly imprinted hydrogels prepared at different pHs. Anal Chim Acta 2008; 625:110-5. [DOI: 10.1016/j.aca.2008.07.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2008] [Revised: 07/03/2008] [Accepted: 07/09/2008] [Indexed: 10/21/2022]
|
29
|
Uslu S, Uysal A, Oktem G, Yurtseven M, Tanyalçin T, Başdemir G. Constructive effect of exogenous melatonin against osteoporosis after ovariectomy in rats. Anal Quant Cytol Histol 2007; 29:317-325. [PMID: 17987812] [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: 05/25/2023]
Abstract
OBJECTIVE To analyze histomorphometric, densitometric and biochemical effects of melatonin on osteoporosis in ovariectomized rats. STUDY DESIGN Wistar rats were divided into 6 groups. Group C: control; Group I: bilateral ovariectomy (OVX); Group II: OVX + vehicle; Group III: OVX + 10 mg/kg/day melatonin (MLT); Group IV: OVX + 30 mg/kg/day MLT; Group V: sham + 10 mg/kg/day MLT. Cortex, trabecula, osteoblast and osteoclast numbers were evaluated on vertebra and femur histomorphometrically. Hydroxyproline analysis was used to determine collagen content of femur and vertebrae. Bone mineral density and bone mineral content were measured. RESULTS Trabecular thickness and trabecular area of vertebra and femur and cortical thickness of femur showed remarkable decrease after OVX, but increased after MLT treatment in the OVX+MLT groups. Following OVX, no statistically significant difference was found in number of osteoblasts or osteoclasts, trabecular number or levels of hydroxyproline after treatment with MLT. OVX caused significant decrease in bone mineral density, but treatment with MLT was unable to reverse this effect. CONCLUSION MLT may trigger microscopic changes in bone, and time of application is critical for clinical recovery. It can be effective in helping treat postmenopausal osteoporosis. However, it is contraindicated in women who have normal-functioning ovaries.
Collapse
Affiliation(s)
- Serap Uslu
- Department of Histology and Embryology, Ege University School of Medicine, TR-35100 Izmir, Turkey
| | | | | | | | | | | |
Collapse
|
30
|
Ugur Bilgin A, Soydan E, Topcuoglu P, Arslan O, Ozcan M, Gurman G, Demirer T, Akan H, Beksac M, Konuk N, Uysal A, Ilhan O, Arat M. 277: Allogeneic hematopoietic cell transplantation in imatinib era. Biol Blood Marrow Transplant 2007. [DOI: 10.1016/j.bbmt.2006.12.282] [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]
|
31
|
Oktem G, Bilir A, Selvi N, Yurtseven ME, Vatansever S, Ates U, Uysal A, Omay SB. Chemotherapy influences inducible nitric oxide synthase (iNOS) and endothelial nitric oxide synthase (eNOS) activity on 3D breast cancer cell line. Oncol Res 2006; 16:195-203. [PMID: 17120617 DOI: 10.3727/000000006783981107] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [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: 11/24/2022] Open
Abstract
Multicellular tumor spheroids (MTS) are three-dimensional structural forms of tumors grown in vitro in the laboratory. In this study, the aim was to determine the regulation of inducible nitric oxide synthase (iNOS) and endothelial nitric oxide synthase (eNOS) expressions on MTS in response to treatment with the commonly used anti-cancer drugs Doxorubicin and Docetaxel. The spheroids were generated using the "liquid overlay" technique. The distribution of both iNOS and eNOS was detected using indirect immunohistochemistry, while the expression of both iNOS and eNOS was measured using Western blots. Additionally, S-phase analysis using 5-bromo-2'-deoxyuridine (BrdU) was done on the MTS after treatment with doxorubicin, docetaxel, and a combination of the two. The Griess method was used to measure nitric oxide (NO) production in the cells. An increase in iNOS immunoreactivity and a decrease in eNOS immunoreactivity were observed after doxorubicin treatment, when compared with the other groups. Furthermore, upregulation of iNOS and downregulation of eNOS were detected in doxorubicin-treated cells using Western blotting. Insignificant iNOS expression was observed in all of the groups, and it was particularly low in the control and drug combination groups. NO production was also found to be significantly high after docetaxel treatment, and cell proliferation decreased after doxorubicin treatment. In conclusion, chemotherapy influences NOS activity differently with the presence of different drugs. The results with iNOS show that doxorubicin is a more effective drug than docetaxel, and a drug combination may play a helpful role in the suppression of tumorigenicity and cancer metastasis. Interestingly, eNOS expression increased after the addition of both docetaxel and the drug combination, and it was found to negatively correlate with the histological grade of the tumor. Therefore, analyzing the expression of both iNOS and eNOS might be very useful for targeting the treatment of breast carcinoma and obtaining better information on prognosis.
Collapse
Affiliation(s)
- G Oktem
- Department of Histology and Embryology, Ege University School of Medicine, TR-35100 Izmir, Turkey.
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Oktem G, Bilir A, Ayla S, Yavasoglu A, Goksel G, Saydam G, Uysal A. Role of Intercellular Communications in Breast Cancer Multicellular Tumor Spheroids After Chemotherapy. Oncol Res 2006; 16:225-33. [PMID: 17294803 DOI: 10.3727/000000006783981071] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 11/24/2022] Open
Abstract
Tumor heterogeneity is an important feature that is especially involved in tumor aggressiveness. Multicellular tumor spheroids (MTS) may provide some benefits in different steps for investigation of the aggregation, organization, differentiation, and network formation of tumor cells in 3D space. This model offers a unique opportunity for improvements in the capability of a current strategy to detect the effect of an appropriate anticancer agent. The aim of this study was to investigate the cellular interactions and morphological changes following chemotherapy in a 3D breast cancer spheroid model. Distribution of the gap junction protein "connexin-43" and the tight junction protein "occludin" was investigated by immunohistochemistry. Cellular interactions were examined by using transmission and scanning electron microscopies as well as light microscopy with Giemsa staining after treating cells with doxorubicin, docetaxel, and doxorubicin/docetaxel combination. Statistical analyses showed significant changes and various alterations that were observed in all groups; however, the most prominent effect was detected in the doxorubicin/docetaxel combination group. Distinct composition as a vessel-like structure and a pseudoglandular pattern of control spheroids were detected in drug-administered groups. Immunohistochemical results were consistent with the ultrastructural changes. In conclusion, doxorubicin/docetaxel combination may be more effective than the single drug usage as shown in a 3D model. The MTS model has been found to be an appropriate and reliable method for the detection of the changes in the expression of cellular junction proteins as well as other cellular proteins occurring after chemotherapy. The MTS model can be used to validate the effects of various combinations or new chemotherapeutic agents as well as documentation of possible mechanisms of new drugs.
Collapse
Affiliation(s)
- G Oktem
- Department of Histology and Embryology, Ege University School of Medicine, TR-35100 Izmir, Turkey.
| | | | | | | | | | | | | |
Collapse
|
33
|
Turgut M, Oktem G, Uslu S, Yurtseven ME, Aktuğ H, Uysal A. The effect of exogenous melatonin administration on trabecular width, ligament thickness and TGF-β1 expression in degenerated intervertebral disk tissue in the rat. J Clin Neurosci 2006; 13:357-63. [PMID: 16546388 DOI: 10.1016/j.jocn.2005.03.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2005] [Accepted: 03/03/2005] [Indexed: 11/29/2022]
Abstract
Intervertebral disk (IVD) degeneration, a complex pathological condition of varying origins, causes low back pain. Degenerative changes in IVD tissue affect the adjacent vertebral structure, resulting in a decreased vertebral trabecular width. It has been suggested that transforming growth factor-beta 1 (TGF-beta(1)) may have a role in the repair of connective tissue, as it occurs in the IVD degeneration process. In this study, we investigated the effects of exogenous melatonin (MEL) administration on vertebral trabecular width, ligament thickness and TGF-beta(1) expression in degenerated IVD tissue. Fifteen adult male Swiss Albino rats were divided randomly into three groups; nonoperated control, operated degeneration, and MEL treatment groups. In the operated degeneration and MEL treatment groups, cuts were made parallel to the end plates in the posterior annulus fibrosus at the fifth and tenth vertebral segments of the tail to induce IVD degeneration. In each group, TGF-beta(1) immunoreactivity and morphometry of vertebral trabecular width and anterior and posterior ligament thickness were evaluated. Histologically, disorganisation and irregularity of collagen fibres was seen in the degenerated (operated) IVD. Increased TGF-beta(1) expression in multinuclear chondrocytes was also observed as was decreased vertebral trabecular width. Importantly, the reduction of trabecular width observed in the operated degenerated group was reversed after MEL administration (p<0.0001). Similarly, TGF-beta(1) expression in multinuclear chondrocytes was dramatically increased after exogenous MEL application. Thus, there was a regression in histopathological changes after MEL treatment, with disk appearances similar to those of the control group. Based on our findings, we suggest that MEL activates the recovery process in the degenerated IVD tissue, possibly by stimulating TGF-beta(1) activity. This is the first report investigating the involvement of the pineal hormone MEL in the repair of rat IVD.
Collapse
Affiliation(s)
- Mehmet Turgut
- Department of Neurosurgery, Adnan Menderes University School of Medicine, Aydin, Turkey.
| | | | | | | | | | | |
Collapse
|
34
|
Oktem G, Vatansever S, Ayla S, Uysal A, Aktas S, Karabulut B, Bilir A. Effect of apoptosis and response of extracellular matrix proteins after chemotherapy application on human breast cancer cell spheroids. Oncol Rep 2006. [DOI: 10.3892/or.15.2.335] [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: 11/06/2022] Open
|
35
|
Oktem G, Vatansever S, Ayla S, Uysal A, Aktas S, Karabulut B, Bilir A. Effect of apoptosis and response of extracellular matrix proteins after chemotherapy application on human breast cancer cell spheroids. Oncol Rep 2006; 15:335-40. [PMID: 16391851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023] Open
Abstract
Multicellular tumor spheroid (MTS) represents a three-dimensional structural form of tumors in laboratory conditions, and it has the characteristics of avascular micrometastases or intervascular spaces of big tumors. Recent studies indicate that extracellular matrix (ECM) proteins play a critical role in tumor metastasis, therefore normal and cancer cells require an ECM for survival, proliferation and differentiation. Doxorubicin and Docetaxel are widely used in the therapy of breast cancer, as well as in in vivo and in vitro studies. In this study, we examined the effect of apoptosis and proliferation of cells on the human breast cancer cell line, MCF-7, by using p53, bcl-2 and Ki67 gene expression, and the tendency to metastasis with extracellular matrix proteins, laminin and type IV collagen after chemotherapy in the spheroid model. The apoptotic cell death in situ was detected by TUNEL method. TUNEL-positive cells and positive immunoreactivities of laminin, type IV collagen, p53 and, bcl-2 were detected in the control group. There was no laminin and type IV collagen immunoreactivities in spheroids of drug groups. While TUNEL-positive cells and p53 immunoreactivity were detected in Docetaxel, Doxorubicin and Docetaxel/Doxorubicin groups, p53 immunoreactivity was not observed in the Docetaxel group. There was no bcl-2 immunoreactivity in either drug group. In addition, we did not detect Ki67 immunoreactivity in both control and drug treatment groups. However, the absence of Ki67 protein in MCF-7 breast multicellular tumor spheroids is possibly related to the cells in G0 or S phase. These chemotherapeutic agents may affect the presence of ECM proteins in this in vitro model of micrometastasis of spheroids. These findings suggest that the possible mechanism of cell death in Doxorubicin and Docetaxel/Doxorubicin treatment groups is related to apoptosis through the p53 pathway. However, we considered the possibility that there is another control mechanism for the Docetaxel group.
Collapse
Affiliation(s)
- G Oktem
- Department of Histology and Embryology, Ege University School of Medicine, TR-35100 izmir, Turkey.
| | | | | | | | | | | | | |
Collapse
|
36
|
Oktem G, Uslu S, Vatansever SH, Aktug H, Yurtseven ME, Uysal A. Evaluation of the relationship between inducible nitric oxide synthase (iNOS) activity and effects of melatonin in experimental osteoporosis in the rat. Surg Radiol Anat 2005; 28:157-62. [PMID: 16362227 DOI: 10.1007/s00276-005-0065-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2005] [Accepted: 10/20/2005] [Indexed: 10/25/2022]
Abstract
Inducible nitric oxide synthase (iNOS) plays a critical role in the pathogenesis of osteoporosis. iNOS generates nitric oxide (NO), a free radical contributing to the imbalance between bone formation and resorption caused by estrogen depletion. Melatonin is the major product of the pineal gland which is known to diminish iNOS expression and NO production significantly. The aim of this study was to determine the distribution of iNOS and the amount of apoptotic cells after melatonin treatment in ovariectomized rats. Since previous studies have shown that constitution of bone formation is primarily sustained in nucleus pulposus and epiphyseal cartilage, experiments were carried out on nucleus pulposus and epiphyseal cartilage; additional quantitation of osteoblasts and osteoclasts were evaluated on vertebral area as well. Vertebral sections of ovariectomized rats were obtained from formalin-fixed and parafin-embedded blocks. iNOS expression and quantitation of apoptotic cells in nucleus pulposus and epiphyseal cartilage were evaluated using indirect immunoperoxidase and TUNEL techniques, respectively. The number of osteoclasts and osteoblasts in trabecular bone was determined using histomorphometry. Ovariectomy increased iNOS expression and the number of apoptotic cells in nucleus pulposus and epiphyseal cartilage, whereas a 4-week treatment with melatonin (10 mg/kg/day) resulted in the reduction of both effects. These data indicate that there is strong influence of melatonin application on expression of iNOS, apoptosis, osteoclast and osteoblast numbers after ovariectomy. In conclusion, melatonin besides its usual use as an antiaging hormone, may also be an effective hormone in treatment of bone changes in estrogen deficiency states.
Collapse
Affiliation(s)
- G Oktem
- Department of Histology and Embryology, School of Medicine, Ege University, Histoloji ve Embriyoloji A D, TR-35100 Izmir, Turkey.
| | | | | | | | | | | |
Collapse
|
37
|
Taskin O, Erman Akar M, Uysal A, Sadik S, Onoglu A, Taner C, Simsek M, Gunduz T. 284. J Minim Invasive Gynecol 2005. [DOI: 10.1016/j.jmig.2005.07.233] [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]
|
38
|
Turgut M, Cullu E, Uysal A, Yurtseven ME, Alparslan B. Chronic changes in cerebrospinal fluid pathways produced by subarachnoid kaolin injection and experimental spinal cord trauma in the rabbit: their relationship with the development of spinal deformity. An electron microscopic study and magnetic resonance imaging evaluation. Neurosurg Rev 2005; 28:289-97. [PMID: 15931513 DOI: 10.1007/s10143-005-0391-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2004] [Accepted: 02/19/2005] [Indexed: 11/25/2022]
Abstract
Post-traumatic cystic changes in cerebrospinal fluid (CSF) pathways such as ventriculomegaly and/or hydrosyringomyelia are not uncommon, but their characteristics have not yet been fully clarified. This study was designed to investigate the alterations affecting the CSF pathways in rabbits at a late stage, and to clarify the relationship between these changes and the development of spinal deformity. In this study, a total of 60 New Zealand white rabbits were used and they were segregated into four different groups of 15 animals each: sham-operation group, kaolin group, and kaolin plus mild trauma group and kaolin plus severe trauma group. The animals were subjected to radiological investigation using direct X-ray study and magnetic resonance imaging (MRI) after 4 months. The thoracic spinal cords of the animals were dissected after intracardiac perfusion-fixation with 10% formalin for light microscopy and 2.5% glutaraldehyde for transmission electron microscopic study. Following the sectioning and staining procedures, the histological characteristics of the spinal cords were evaluated with light microscopy and transmission electron microscopy. A spinal deformity developed in 90% in rabbits in both kaolin injection group and spinal trauma groups. MRI revealed generalized dilatation of the ventricular system and the central canal of the spinal cord after the kaolin injection with/without trauma in this study. Gross morphologic examination showed some enlargement of entire CSF pathways in these groups. All animals with central canal dilatation had mild or severe scoliotic and kyphotic deformities. In a light microscopic study, a denuded ependymal line and multicyst formations in periependymal areas were found in both kaolin injection and spinal trauma groups. Ultrastructurally, an apical flattening of the ependyma, microcysts in the ependymal cells, axonal degeneration, demyelination, and loss of ependymal cells adjacent mild spongy were found in the spinal cords of animals in these groups. To the best of our knowledge, this is the first study to investigate the chronic effects of spinal cord injury (SCI) on the CSF pathways and their relationship with the development of spinal deformity in an experimental model of kaolin injection and trauma, using MRI as well as light and transmission electron microscopy. In the light of this study, the severity of spinal cord injury on the development of some degenerative findings in the spinal cord was clear, but further clinical and experimental studies using dynamic imaging techniques will be valuable.
Collapse
Affiliation(s)
- Mehmet Turgut
- Department of Neurosurgery, Adnan Menderes University School of Medicine, Aydin, Turkey.
| | | | | | | | | |
Collapse
|
39
|
Duparc F, Noyon M, Ozeel J, Gerometta A, Michot C, Tadjalli M, Moslemy H, Safaei S, Heiman A, Wish-Baratz S, Melnikov T, Smoliar E, Hakan AY, Yucel F, Kachlík DK, Pešl MP, Báča VB, Stingl JS, Kachlík KD, Čech ČP, Báča BV, Mompeó B, Marrero-Rodriguez A, Zeybek A, Sağlam B, Çikler E, Çetinel Ş, Ercan F, Şener G, Kawawa Y, Kohda E, Tatsuya T, Moroi M, Kunimasa T, Nagamoto M, Terada H, Labuschagne BCJ, van der Krieke TJ, Hoogland PV, Muller CJF, Lyners R, Vorster W, Matusz P, Zaboi DE, Xu SC, Tu LL, Wang Q, Zhang M, Han H, Tao W, Jiao Y, Pang G, Aydin ME, Kopuz C, Demir MT, Yildirim M, Kale A, Ince Y, Khamanarong K, Jeeravipoolvarn P, Chaijaroonkhanarak W, Gawgleun W, Fujino T, Uz A, Apaydin N, Bozkurt M, Elhan A, Sheibani MT, Adibmoradi M, Jahovic N, Alican I, Erkanli G, Arbak S, Karakaş S, Taşer F, Güneş H, Yildiz Y, Yazici Y, Aland RC, Kippers V, Song WC, Park SH, Shin C, Koh KS, Russo G, Pomara F, Veca M, Cacciola F, Martorana U, Gravante G, Tobenas-Dujardin AC, Laquerrière A, Muller JM, Fréger P, López-Serna N, Álvarez-González E, Torres-Gonzàlez V, Laredo-López G, Esparza-González GV, Álvarez-Cantú R, Garza-González CE, Guzmán-López S, Aldur MM, Çelik HH, Sürücü S, Denk C, Yang HJ, Gil YC, Kim TJ, Lee HY, Lee WJ, Lee H, Hu KS, Akita K, Kim HJ, Jung HS, Gurbuz H, Balik S, Wavreille G, Chantelot C, Demondion X, Fontaine C, Çavdar S, Yalin A, Saka E, Özdoǧmuş Ö, Çakmak Ö, Elevli L, Saǧlam B, Coquerel-Beghin D, Milliez PY, Lemierre G, Oktem G, Vatansever S, Ayla S, Uysal A, Aktas S, Karabulut B, Bilir A, Uslu S, Aktug H, Yurtseven ME, Celik HH, Tatar I, Surucu S, Karaduman A, Tunali S, Neuhüttler S, Kröll A, Moriggl B, Brenner E, Loukas M, Arora S, Louis RG, Fogg QA, Wagner T, Tedman RA, Ching HY, Eze N, Bottrill ID, Blyth P, Faull RLM, Vuletic J, Elizondo-Omaña RE, Rodríguez MAG, López SG, de la Garza OT, Liu YH, Zhang KL, Lu DH, Kwak HH, Park HD, Youn KH, Kang HJ, Kang HC, Han SH, Ikiz ZAA, Ucerler H, Uygur M, Kutoglu T, Dina C, Iliescu D, Şapte E, Bordei P, Lekšan I, Marcikić M, Radić R, Nikolić V, Kurbel S, Selthofer R, Báča V, Doubková A, Kachlík D, Stingl J, Džupa V, Grill R, Nam YS, Paik DJ, Shin CS, Kim SJ, Kim DG, Jin CS, Kim DI, Lee UY, Kwak DS, Lee JH, Han CH, Carpino A, Rago V, Romeo F, Carani C, Andò S, Arican RY, Coskun N, Sarikcioglu L, Sindel M, Arican YR, Altun U, Ozsoy U, Oguz N, Yildirim FB, Nakajima K, Duygulu E, Aydin H, Gurer EI, Ozkan O, Tuzuner S, Özsoy U, Çubukçu S, Demirel BM, Akkin SM, Marur T, Weiglein AH, Maghiar TT, Borza C, Bumbu A, Bumbu G, Polle G, Auquit-Auckbur I, Dujardin F, Biga N, Olivier E, Defives T, Ghazali S, Anastasi G, Rizzo G, Favaloro A, Miliardi D, Giacobbe O, Santoro G, Trimarchi F, Cutroneo G, Govsa F, Bilge O, Ozer MA, Erdogmus S, Grizzi F, Pelillo F, Mori M, Franceschini B, Portinaro N, Godlewski G, Viala M, Rouanet JP, Prat D, Rahmé ZS, Prudhomme M, Eken E, Kwiatkowska M, Liegmann J, Chmielewski R, Grimmond J, Kwiatkowski M, Schintler MV, Windisch G, Wittgruber G, Prandl EC, Prodinger P, Anderhuber F, Scharnagl E, Gerbino A, Buscemi M, Leone A, Mandracchia R, Peri G, Lipari D, Farina-Lipari E, Valentino B, D’Arpa S, Cordova A, Bucchieri F, Ribbene A, David S, Palma A, Davies DE, Haitchi HM, Holgate ST, La Rocca G, Anzalone R, Campanella C, Rappa F, Bartolotta T, Cappello F, Bellafiore M, Sivverini G, Palumbo D, Macaluso F, Farina F, Di Felice V, Montalbano A, Ardizzone N, Marcianò V, Zummo G, Tanyeli E, Üzel M, Carini F, Scardina GA, Varia P, Valenza V, Messina P, Meiring JH, Schumann C, Whitmore I, Greyling LM, Hamel O, Hamel A, Robert R, Garçon M, Lagier S, Blin Y, Armstrong O, Rogez JM, Le Borgne J, Ifrim CF, Maghiar A, Botea M, Ifrim M, Pop O, Sandor M, Behdadipour Z, Saberi M, Esfandiary E, Gentile C, Marconi A, Livrea MA, Uzan G, D’Alessio P, Ridola CG, Grassi N, Pantuso G, Bottino A, Cacace E, Li Petri S, Di Gaudio F, Guercio G, Latteri MA, Nobile D, Cipolla C, Caruso G, Salvaggio G, Lo Cascio A, Fatta G, Lagalla R, Campisi A, Verderame F, Martegani A, Cardinale AE, Luedinghausen MV. Poster presentation. Surg Radiol Anat 2005. [DOI: 10.1007/bf03371476] [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]
|
40
|
Atad J, Auslender R, Bardicef M, Calderon I, Hallak M, Abramovici H, Caliskan E, Ozkan S, Yalcinkaya O, Turkoz E, Polat A, Corakci A, Numanoglu N, Seyhan A, Usta T, Sidal B, Ertas E, Kalyoncu S, Kahyaoglu S, Yilmaz B, Ozel M, Mollamahmutoglu L, Oral H, Mardi A, Molavi P, Tazakori Z, Mashoufi M, Arikan G, Giuliani A, Kocak I, Yusuf AY, Üstün C, Tasdemir S, Torgac M, Gürkan N, Kocak I, Üstün C, Verit F, Artuc H, Sen S, Güngör ES, Mollamahmutoglu L, Danisman N, Biri A, Onan MA, Korucuoglu U, Taner MZ, Tiras MB, Himmetoglu O, Özbay K, Inanmis RA, Duvan C, Atabey S, Bolkan F, Turhan N, Dilmen G, Ingec M, Borekci B, Altas S, Kadanali S, Yucer G, Sagsoz N, Yucel A, Noyan V, Kurdoglu Z, Kurdoglu M, Onan MA, Bozkurt N, Gunaydin G, Taner Z, Himmetoglu O, Tuncay YA, Bilgic E, Kirecci A, Sezginsoy S, Yücel N, Güzin K, Kayabasoglu F, Kirecci A, Tuncay Y, Kanadikirik F, Balta O, Duran B, Yanar O, Salk S, Erden Ö, Cetin M, Binici K, Yildirim G, Yetkin YG, Tekirdag A, Bozdag G, Salman MC, Ozyuncu O, Basaran A, Yigit-Celik N, Kizilkilic-Parlakgumus A, Ayhan A, Kepkep K, Tuncay YA, Karaaslan I, Teksen A, Uysal A, Erdem G, Usai D, Tanriverdi HA, Cinar E, Barut A, Yücesoy G, Özkan S, Yildiz M, Bodur H, Cakiroglu Y, Caliskan E, Caliskan E, Doger E, Cakiroglu Y, Ozkan S, Ozeren S, Corakci A, Caliskan E, Dundar D, Caliskan S, Cakiroglu Y, Tekin A, Ozeren S. General obstetrics. Arch Gynecol Obstet 2005. [DOI: 10.1007/bf02954777] [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]
|
41
|
Mardi A, Rahimi G, Amani M, Mashoufi M, Kheirkhah M, Ghaffari NM, Pierovi T, Soleimani RJ, Vanlioglu F, Karaman Y, Bingol B, Tavmergen E, Akdogan A, Akman A, Levi R, Tavmergen GEN, Ates U, Seyhan A, Atmaca U, Ortakuz S, Ata B, Akar S, Usta T, Özdemir B, Sidal B, Yoldemir T, Gee A, Sutherland P, Bowman M, Fraser IS, Haydardedeoglu B, Bagis T, Kilicdag EB, Simsek E, Aslan E, Zeyneloglu HB, Kahyaoglu S, Turgay I, Ertas E, Yilmaz B, Var T, Batioglu S, Muftuoglu K, Tekcan C, Naki MM, Uysal A, Güzin K, Yücel N, Kanadikirik F, Kelekci S, Savan K, Kalyoncu S, Gokturk U, Oral H, Mollamahmutoglu L, Ertas IE, Mollamahmutoglu L, Kahveci S, Dogan M, Mollamahmutoglu L, Isik A, Saygili U, Gol M, Koyuncuoglu M, Uslu T, Erten O, Ciftci B, Biri A, Bozkurt N, Karabacak O, Himmetoglu O, Amir JN, Nouri M, Hascalik S, Celik O, Parlakpinar H, Mizrak B, Ozsahin M, Önder C, Gezginc K, Colakoglu M, Demir SC, Cetin MT, Kadayifci O, Güzel AB, Polat I, Yildirim G, Özdemir A, Tekirdag AI, Kizkin S, Engin-Ustun Y, Ustun Y, Ozcan C, Serbest S, Ozisik HI, Ergenoglu M, Goker ENT, Uckuyu A, Ozcimen EE, Nisanoglu O, Onal C, Akgun S, Koc S, Cebi Z, Sönmez S, Yasar L, Küpelioglu L, Bilecan S, Aygün M, Zebitay AG, Dursun P, Ötegen Ü, Bozdag G, Yarali H, Demirci F, Mun S, Eraydin E, Sadik S, Sipahi C, Bayol Ü, Sarikaya S, Garipoglu DE, Delilbasi L, Gursoy R, Engin-Ustun Y, Meydanli MM, Atmaca R, Kafkasli A, Canda MT, Kucuk M, Bagriyanik HA, Ozyurt D, Canda T, Güven MA, Tamsoy S, Kaymak O, Ozkale D, Okyay RE, Neslihanoglu R, Mollamahmutoglu L, Basaran A, Gultekin M, Saygili YE, Esinler I, Bayer U, Gunalp S, Aksu T, Gultekin M, Leventerler H, Taga S, Cetin T, Solmaz S, Dikmen N, Karalök H, Ilter E, Tufekci C, Yilmaz S, Karalök AE, Batur O, Kilicdag E, Haydardedeoglu B, Tarim E, Api M, Gültekin E, Görgen H, Cetin A, Yayla M, Özkilic T, Arikan I, Abali R, Arikan D, Bozkurt S, Demir B, Gunalp S, Erden AC, Özcan J, Yazicioglu F, Demirbas R. Endocrinology and reproductive medicine. Arch Gynecol Obstet 2005. [DOI: 10.1007/bf02954773] [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]
|
42
|
Turgut M, Uysal A, Pehlivan M, Oktem G, Yurtseven ME. Assessment of effects of pinealectomy and exogenous melatonin administration on rat sciatic nerve suture repair: an electrophysiological, electron microscopic, and immunohistochemical study. Acta Neurochir (Wien) 2005; 147:67-77; discussion 77. [PMID: 15565477 DOI: 10.1007/s00701-004-0426-x] [Citation(s) in RCA: 21] [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: 10/26/2022]
Abstract
BACKGROUND Collagen scar formation at the cut end of a nerve, an important problem in clinical practice for neurosurgeons in peripheral nerve surgery, obstructs sprouting of axons into appropriate distal fascicles, and thereby limits nerve regeneration. Researchers attempt to control collagen accumulation in the formation of neuroma by various physical and chemical methods, but these have yielded only limited functional success. This is the first experimental study investigating the effects of melatonin (MLT) on nerve repair and neuronal regeneration in rat sciatic nerve suture repair. METHODS The hypothesis that exogenous MLT administration may inhibit the formation of neuroma in peripheral nerve surgery was investigated in rat sciatic nerve model. In this study, a total of 80 rats were used for control groups (Groups Ia, Ib, IIa, and IId), MLT group (Group Ic), surgical pinealectomy (Px) groups (Groups IIb and IIc), and group of MLT treatment following Px procedure (Group IIe). All animals underwent a surgical intervention consisting of bilateral sciatic nerve section and primary suture repair. At 8 weeks after repair, the animals were killed following completion of recording of nerve action potentials (NAPs). Then, unilateral sciatic nerve specimens including the suture repair region were carefully removed and the excised segments were processed for electron microscopy examination. Afterwards, contralateral sciatic nerve specimens from two animals from each group were removed and stained for immunohistochemical analysis. RESULTS Results of morphometric analysis revealed that Px procedure caused an elevation of collagen content of the sciatic nerve and macroscopic neuroma formation, and that there was a statistically significant reduction in collagen content of the same region in pinealectomized animals treated with MLT (p<0.001). Accordingly, electrophysiological findings demonstrated that the stimulus intensities required to excite a NAP response were increased in surgical Px group, but the presence of a reduced threshold response was found in the group treated with MLT following Px procedure (p<0.01). Immunohistochemical staining for Type I collagen and Type III collagen was markedly more intense in the epineurium of animals after Px. Virtually no or only weak staining was observed in animals in control groups and the MLT treatment group. Results of immunohistochemical analysis revealed that surgical Px procedure caused a strong immunoreactivity for Type I collagen and Type III collagen in all connective tissue planes of the nerve, especially in the epineurium, and there was a statistically significant reduction in immunoreactivity of the repair region in animals receiving MLT treatment after Px procedure (p<0.001). CONCLUSION This study demonstrates that exogenous MLT administration significantly inhibits collagen accumulation in the formation of neuroma in the suture repair site and thereby improves nerve regeneration. From a clinical standpoint, the positive effect of MLT administration on neuroma formation and nerve regeneration seems a particularly attractive treatment option. Therefore, we believe that nerve repair with addition of MLT may be a worthwhile option in addition to other treatment modalities in case of MLT deficiency, such as aging. However, further experimental and clinical studies using functional analysis warranted to confirm this result in future.
Collapse
Affiliation(s)
- M Turgut
- Department of Neurosurgery, Adnan Menderes University School of Medicine, Aydin, Turkey.
| | | | | | | | | |
Collapse
|
43
|
Abstract
OBJECTIVE Effects of amlodipine on lipid peroxidation and alterations in glutathione and related enzymes in blood and aortic tissue were investigated in a cholesterol-induced atherosclerotic rabbit model. METHODS AND RESULTS New Zealand white male rabbits were fed with regular chow (group I), chow supplemented with I% cholesterol (group II), regular chow plus amlodipine 5 mg/kg/day p.o. (group III) and I% cholesterol diet supplemented with amlodipine (group IV) for 8 weeks. Cholesterol, malondialdehyde (MDA), reduced glutathione (GSH), oxidized glutathione (GSSG), glutathione peroxidase (GSH-PX) and glutathione reductase (GSH-Rd) were determined in blood samples drawn before and after the experimental period. Aortic tissue was examined morphologically for atherosclerotic changes and tissue cholesterol, MDA, GSSG, GSH-PX, GSH-Rd and glutathione-S-transferase (GST) were measured. After 8 weeks, blood cholesterol, MDA, GSSG and GSH-PX were elevated in groups II and IV; GSH was reduced in group IV; MDA levels were higher in group II than in group IV. Aortic tissue investigations revealed higher cholesterol and MDA concentrations in group II than in group IV. Morphological examination of aortic tissues exhibited endothelial disarrangement and lipid deposition in group II. Histopathological alterations related to atherogenesis were less in group IV than in group II. CONCLUSIONS Amlodipine reduced the increase in oxidative stress by inhibiting excessive MDA production. Accelerated glutathione redox cycle activity of erythrocytes from animals supplemented with amlodipine suggests that this drug may reduce oxidative stress by enhancing the glutathione system. However, this drug does not seem to affect the glutathione redox cycle in the aortic tissue.
Collapse
Affiliation(s)
- Işil Mutaf
- Department of Clinical Biochemistry, Ege University School of Medicine, 35100 Bornova, Izmir, Turkey
| | | | | | | | | | | | | |
Collapse
|
44
|
Onal A, Uysal A, Ulker S, Delen Y, Yurtseven ME, Evinç A. Alterations of brain tissue in fetal rats exposed to nicotine in utero: possible involvement of nitric oxide and catecholamines. Neurotoxicol Teratol 2004; 26:103-12. [PMID: 15001219 DOI: 10.1016/j.ntt.2003.08.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2002] [Accepted: 08/28/2003] [Indexed: 11/28/2022]
Abstract
Histopathological changes in the brains of embryos from female rats treated with nicotine during pregnancy and possible involvement of nitric oxide (NO) and catecholamines in the nicotine-induced abnormalities of developing brain were investigated. Sexually mature female Wistar rats were given 1, 2, and 3 mg/kg nicotine hydrogen tartrate (NHT) subcutaneously for 20 days after mating. Levels of cotinine, a nicotine metabolite, in the maternal plasma increased dose-dependently. Fetus and fetal brain weights were significantly lower in all nicotine-treated groups. Light microscopy of hippocampal CA1 area showed a decrease in the number of cells per unit area. Electron microscopy of the same region revealed a dose-dependent increase in intracytoplasmic edema, mitochondrial swelling, dilation of rough endoplasmic reticulum, nuclear configurative abnormalities, and condensation of the nuclear chromatin. Nitrate + nitrite levels in fetal brain homogenates were significantly lower in the groups treated with 2 and 3 mg/kg NHT. Norepinephrine and normetanephrine (NMN) levels were significantly higher in 2 and 3 mg/kg NHT groups, as well as dopamine, 3-methoxy-4-hydroxyphenylethyleneglycole (MHPG), and dihydroxyphenylacetic acid levels in the 3-mg/kg NHT group. In conclusion, maternal nicotine exposure may lead to structural abnormalities of the fetal brain tissue and may result in decreased levels of NO and increased levels of catecholamines and their metabolites.
Collapse
Affiliation(s)
- Aytül Onal
- Department of Pharmacology, School of Medicine, Ege University, Bornova, Izmir 35100, Turkey.
| | | | | | | | | | | |
Collapse
|
45
|
|
46
|
Turgut M, Yenisey C, Uysal A, Bozkurt M, Yurtseven ME. The effects of pineal gland transplantation on the production of spinal deformity and serum melatonin level following pinealectomy in the chicken. Eur Spine J 2003; 12:487-94. [PMID: 12687443 PMCID: PMC3468002 DOI: 10.1007/s00586-003-0528-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2002] [Revised: 09/14/2002] [Accepted: 12/21/2002] [Indexed: 11/27/2022]
Abstract
Pinealectomy frequently produces spinal deformity in some animal models, but the precise biological mechanism of this phenomenon remains obscure. The current study investigated the effects of an autograft pineal body on the development of spinal deformity and serum melatonin (MLT) concentration after pinealectomy in the chicken. Thirty-six chickens (2 days of age) were divided into three equal groups. While the removal of the pineal gland was performed in groups B and C, a pineal body autograft was surgically implanted into the body wall musculature only in the pineal transplantation group (group C). Chickens in which no surgical intervention was performed served as intact controls (group A). Posteroanterior radiographs of the spines of the chickens were taken at the age of 8 weeks. These were used to determine Cobb angles and to measure the rib-vertebra angles (RVA) on the concave and convex sides of the curves, from which data the difference between the convex and concave RVA (the RVAD) was calculated. At the end of the study, serum MLT levels were determined using the enzyme-linked immunosorbent assay method, and histopathological examination of specimens from all the groups was performed. The results were compared using one-way analysis of variance followed by Duncan's test for pairwise comparisons or by the Kruskal-Wallis test followed by the Mann-Whitney U tests for comparisons between two groups. In this study, the serum MLT levels in groups B and C were significantly lower than those in group A ( P<0.05). However, scoliosis developed in only 7 of 12 (58%) in group B and 6 of 12 (50%) in group C. The average Cobb angle and RVAD in groups B and C were significantly larger than those found in group A ( P=0.000 and P=0.001, respectively). Interestingly, there were no significant differences in either serum MLT levels or development of scoliosis between groups B and C. From the results of the current study, it is evident that the intramuscular pineal gland transplantation following pinealectomy in young Hybro Broiler chickens has no significant effect on the development of spinal deformity and serum MLT level. In the light of this result, the role of MLT in the development of spinal deformity in chickens after pinealectomy remains controversial, and further investigations are warranted.
Collapse
Affiliation(s)
- Mehmet Turgut
- Department of Neurosurgery, Adnan Menderes University School of Medicine, Aydin, Turkey.
| | | | | | | | | |
Collapse
|
47
|
Can C, Demirci B, Uysal A, Akçay YD, Koşay S. Contradictory effects of chlorpromazine on endothelial cells in a rat model of endotoxic shock in association with its actions on serum TNF-alpha levels and antioxidant enzyme activities. Pharmacol Res 2003; 48:223-30. [PMID: 12860438 DOI: 10.1016/s1043-6618(03)00093-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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] [Indexed: 10/27/2022]
Abstract
We examined the effects of the phenothiazine derivative, chlorpromazine on thoracic aortic endothelial cell histology (14 h after LPS challenge) in a model of endotoxic shock in rats. Since excessive formation of tumor necrosis factor-alpha (TNF-alpha) and oxygen-derived free radicals contribute to endothelial injury in endotoxemia, we also evaluated the effect of the drug on the activities of antioxidant enzymes superoxide dismutase (SOD) and catalase in liver tissue in this model and tried to find out whether this possible effect was associated with a change in serum TNF-alpha levels (measured 90 min after chlorpromazine administration). Endotoxemia was induced by a single i.p. injection of lipopolysaccharide (LPS) (5 mg kg(-1) in 1.5 ml of saline; LPS from Escherichia coli serotype 055:B5, L-2880, Sigma Chemical Company). Electron microscopic evaluation of the aortas revealed that chlorpromazine (administered 30 min prior to LPS challenge), in smaller doses (3 mg kg(-1)) ameliorated the endothelial cell injury caused by LPS, whereas it caused deterioration of endothelial cell morphology in higher doses (10 and 25 mg kg(-1)). Chlorpromazine administration caused a significant reduction in serum TNF-alpha levels, which was correlated well with an increase in SOD activity in all drug doses (3, 10 and 25 mg kg(-1)). Catalase activity was increased only in the 25 mg kg(-1) chlorpromazine group.
Collapse
MESH Headings
- Analysis of Variance
- Animals
- Antioxidants/pharmacology
- Aorta/drug effects
- Aorta/ultrastructure
- Catalase/drug effects
- Catalase/metabolism
- Chlorpromazine/pharmacology
- Disease Models, Animal
- Dose-Response Relationship, Drug
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/pathology
- Endothelium, Vascular/ultrastructure
- Escherichia coli
- Lipopolysaccharides
- Liver/enzymology
- Male
- Microscopy, Electron
- Rats
- Rats, Wistar
- Shock, Septic/chemically induced
- Shock, Septic/metabolism
- Shock, Septic/pathology
- Superoxide Dismutase/drug effects
- Superoxide Dismutase/metabolism
- Tumor Necrosis Factor-alpha/metabolism
Collapse
Affiliation(s)
- Cenk Can
- Department of Pharmacology, School of Medicine, Ege University, 35100 Bornova, Izmir, Turkey.
| | | | | | | | | |
Collapse
|
48
|
Bayindir O, Ozmen D, Mutaf I, Turgan N, Habif S, Gülter C, Parildar Z, Uysal A. Comparison of the effects of dietary saturated, mono-, and n-6 polyunsaturated fatty acids on blood lipid profile, oxidant stress, prostanoid synthesis and aortic histology in rabbits. Ann Nutr Metab 2003; 46:222-8. [PMID: 12378047 DOI: 10.1159/000065411] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS To compare the effects of saturated, monounsaturated and polyunsaturated n-6 fatty acid-enriched diets on the development of atherosclerosis and thrombosis in New Zealand white male rabbits, 3- to 6-month-old animals were supplemented daily (10 g/100 g diet) with butter (n = 8), olive oil (n = 8) or corn oil (n = 8) by oral administration for 7 weeks. METHODS Total cholesterol (TC), HDL- (HDL-C) and LDL-cholesterol (LDL-C), triglycerides (TG), apolipoprotein A-1 (ApoA-1), apolipoprotein B (ApoB), lipid peroxides as thiobarbituric acid-reactive substances (TBARS), thromboxane B2 (TXB2) and 6-ketoprostaglandin F(1alpha) (6-ketoPGF(1alpha)) concentrations were determined in blood samples drawn before and after each group was fed the different dietary regimens. Histological examination was performed on the aortic tissues. RESULTS After 7 weeks, TC, ApoB and TXB2 increased significantly (p < 0.05) in the butter-fed animals compared to pre-experimental concentrations. Olive oil administration lead to a significant (p < 0.05) decrease in TC and ApoB levels. The corn oil-enriched diet decreased TC, LDL-C concentrations, TC/HDL-C ratios and 6-ketoPGF(1alpha) (stable metabolite of prostacyclin-PGI2; p < 0.05 for all) but increased TBARS levels and TXB2/6-ketoPGF(1alpha) ratios. Light microscopic findings were in accordance with these biochemical alterations. CONCLUSION Although effective in lipid lowering, corn oil increased oxidant stress as evidenced by increased TBARS and induced endothelial damage which lead to a reduction in PGI2 synthesis and consequently to an increase in the TXB2/6-ketoPGF(1alpha) ratio. Olive oil administration did not induce oxidant stress and it had no affect on PGI2 and TXB2 levels which are implicated in platelet aggregation. These findings suggest that oleic acid is more effective than linoleic acid in the protection of endothelial integrity.
Collapse
Affiliation(s)
- Oya Bayindir
- Department of Clinical Biochemistry and Histology, Ege University School of Medicine, Bornova/Izmir, Turkey
| | | | | | | | | | | | | | | |
Collapse
|
49
|
Turgut M, Uslu S, Uysal A, Yurtseven ME, Ustün H. Changes in vascularity of cartilage endplate of degenerated intervertebral discs in response to melatonin administration in rats. Neurosurg Rev 2003; 26:133-8. [PMID: 12962300 DOI: 10.1007/s10143-003-0259-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [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: 11/24/2022]
Abstract
We carried out an experimental investigation of cartilage endplate vascularity of degenerated intervertebral discs produced by exogenous melatonin (MEL) treatment. Adult Swiss albino rats were divided into three groups: control, operated degeneration, and MEL treatment. There were five rats in each group and, using a posterior approach, cuts were made parallel to the endplates in the posterior annulus fibrosus in five consecutive intervertebral discs between the 5th and 10th vertebral segments of the rats' tails. At 8 weeks, five of these animals were treated with exogenous MEL (s.c. injection of 30 microg/100 g body weight daily for 4 weeks). In each experimental group, one animal was examined using CT scanner to study the density of the cartilage endplate of the disc. To evaluate the bone growth and vascularity of the cartilage endplate region, the animals were killed for subsequent histopathological evaluation. We found that the vascular channel counts and percentage areas from animals treated with MEL were significantly lower than from the operated degeneration animals. Accordingly, the density histogram in the MEL group showed a spike profile for both the vertebral body and the cartilage endplate, indicating an increase in the amount of higher density tissues in these regions. Our results demonstrate that the use of MEL reduces the cartilage endplate vascularity of degenerated intervertebral discs, suggesting that it may have an osteoinductive effect on bone formation. Further studies are needed to characterize fully the relevance of our findings for the treatment of disorders such as postmenopausal osteoporosis.
Collapse
Affiliation(s)
- Mehmet Turgut
- Department of Neurosurgery, Faculty of Medicine, Adnan Menderes University, Aydin, Turkey.
| | | | | | | | | |
Collapse
|
50
|
Turgut M, Uysal A, Uslu S, Tavus N, Yurtseven ME. The effects of calcium channel antagonist nimodipine on end-plate vascularity of the degenerated intervertebral disc in rats. J Clin Neurosci 2003; 10:219-23. [PMID: 12637054 DOI: 10.1016/s0967-5868(02)00336-3] [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: 11/28/2022]
Abstract
The vascular channels at the end-plate of the intervertebral disc are very important in maintaining a healthy disc. With age, a reduction of the nutrition of the avascular nucleus pulposus is inevitable. On the other hand the calcium channel antagonist nimodipine has been shown to have a positive effect on blood flow in the region of the vertebral end-plate. To evaluate the effects of nimodipine on the end-plate vascularity in the degenerative discs, we have produced an experimental disc degeneration and evaluated the radiological and histopathological features of the end-plate of the degenerated discs. Adult rats were divided into 3 groups: control (n=5), operated degeneration (n=5), and nimodipine treatment (n=5). Using a posterior approach, a cut was made parallel to the end-plates in the posterior annulus fibrosus in 5 consecutive intervertebral discs between the 5th and 10th vertebral segments of the tails of adult Swiss Albino rats. At 8 weeks, 5 of these animals were treated with nimodipine. In each experimental group, 1 animal was examined using computed tomography (CT) to study the density of the cartilage end-plate of the disc. Then, the animals were sacrificed for subsequent histopathological evaluation. We found that the vascular channel counts and percentage areas from animals treated with nimodipine were higher than from both the non-operative control and operated degeneration groups, although these were not statistically different. Accordingly, the profile of the density histogram in the nimodipine-treated group showed a wide plateau, indicating an increase in the vascularity in this region. From our results, we suggest that nimodipine enhances vascularisation of the cartilage end-plate in the disc. It is possible that the increased proportion of vascular contacts at the end-plate has a beneficial effect in the nutrition of the disc. However, further experimental studies will be needed to determine the validity of this statement in animals or human beings.
Collapse
Affiliation(s)
- Mehmet Turgut
- Department of Neurosurgery, Adnan Menderes University Medical Faculty, 09100 Aydin, Turkey.
| | | | | | | | | |
Collapse
|