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Huflage H, Grunz JP, Kunz AS, Patzer TS, Sauer ST, Christner SA, Petritsch B, Ergün S, Bley TA, Luetkens KS. Potential of employing a quantum iterative reconstruction algorithm for ultra-high-resolution photon-counting detector CT of the hip. Radiography (Lond) 2023; 29:44-49. [PMID: 36274316 DOI: 10.1016/j.radi.2022.09.010] [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: 07/09/2022] [Revised: 09/14/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022]
Abstract
INTRODUCTION This study investigated the image quality of a new quantum iterative reconstruction algorithm (QIR) for high resolution photon-counting CT of the hip. METHODS Using a first-generation photon-counting CT scanner, five cadaveric specimens were examined with ultra-high-resolution protocols matched for radiation dose. Images were post-processed with a sharp convolution kernel and five different strength levels of iterative reconstruction (QIR 0 - QIR 4). Subjective image quality was rated independently by three radiologists on a five-point scale. Intraclass correlation coefficients (ICC) were computed for assessing interrater agreement. Objective image quality was evaluated by means of contrast-to-noise-ratios (CNR) in bone and muscle tissue. RESULTS For osseous tissue, subjective image quality was rated best for QIR 2 reformatting (median 5 [interquartile range 5-5]). Contrarily, for soft tissue, QIR 4 received the highest ratings among compared strength levels (3 [3-4]). Both ICCbone (0.805; 95% confidence interval 0.711-0.877; p < 0.001) and ICCmuscle (0.885; 0.824-0.929; p < 0.001) suggested good interrater agreement. CNR in bone and muscle tissue increased with ascending strength levels of iterative reconstruction with the highest results recorded for QIR 4 (CNRbone 29.43 ± 2.61; CNRmuscle 8.09 ± 0.77) and lowest results without QIR (CNRbone 3.90 ± 0.29; CNRmuscle 1.07 ± 0.07) (all p < 0.001). CONCLUSION Reconstructing photon-counting CT data with an intermediate QIR strength level appears optimal for assessment of osseous tissue, whereas soft tissue analysis benefitted from applying the highest strength level available. IMPLICATIONS FOR PRACTICE Quantum iterative reconstruction technique can enhance image quality by significantly reducing noise and improving CNR in ultra-high resolution CT imaging of the hip.
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Affiliation(s)
- H Huflage
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - J-P Grunz
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - A S Kunz
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - T S Patzer
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - S T Sauer
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - S A Christner
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - B Petritsch
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - S Ergün
- Institute of Anatomy and Cell Biology, University of Würzburg, Koellikerstraße 6, 97070 Würzburg, Germany.
| | - T A Bley
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - K S Luetkens
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
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Dokuz G, Ergün S, Topçuoğlu V, Topçuoğlu V. Restless Legs Syndrome After Aripiprazole Discontinuation: A Case Report and Review of Literature. Psychiatr Danub 2022; 34:738-740. [PMID: 36548895 DOI: 10.24869/psyd.2022.738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Gonca Dokuz
- Department of Psychiatry, Faculty of Medicine, Bezmialem Vakıf University, Adnan Menderes Bulvarı, Vatan Cad., Istanbul, Turkey,
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Huflage H, Grunz JP, Hackenbroch C, Halt D, Luetkens KS, Alfred Schmidt AM, Patzer TS, Ergün S, Bley TA, Kunz AS. Metal artefact reduction in low-dose computed tomography: Benefits of tin prefiltration versus postprocessing of dual-energy datasets over conventional CT imaging. Radiography (Lond) 2022; 28:690-696. [PMID: 35728278 DOI: 10.1016/j.radi.2022.05.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/01/2022] [Accepted: 05/30/2022] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The purpose of this study was to determine the potential for metal artefact reduction in low-dose multidetector CT as these pose a frequent challenge in clinical routine. Investigations focused on whether spectral shaping via tin prefiltration, virtual monoenergetic imaging or virtual blend imaging (VBI) offers superior image quality in comparison with conventional CT imaging. METHODS Using a third-generation dual-source CT scanner, two cadaveric specimens with different metal implants (dental, cervical spine, hip, knee) were examined with acquisition protocols matched for radiation dose with regards to tube voltage and current. In order to allow for precise comparison, and due to the relatively short scan lengths, automatic tube current modulation was disabled. Specifically, the following scan protocals were examined: conventional CT protocols (100/120 kVp), tin prefiltration (Sn 100/Sn 150 kVp), VBI and virtual monoenergetic imaging (VME 100/120/150 keV). Mean attenuation and image noise were measured in hyperdense and hypodense artefacts, in artefact-impaired and artefact-free soft tissue. Subjective image quality was rated independently by three radiologists. RESULTS Objectively, Sn 150 kVp allowed for the best reduction of hyperdense streak artefacts (p < 0.001), while VME 150 keV and Sn 150 kVp protocols facilitated equally good reduction of hypodense artefacts (p = 0.173). Artefact-impaired soft tissue attenuation was lowest in Sn 150 kVp protocols (p ≤ 0.011), whereas all VME showed significantly less image noise compared to conventional or tin-filtered protocols (p ≤ 0.001). Subjective assessment favoured Sn 150 kVp regarding hyperdense streak artefacts and delineation of cortical bone (p ≤ 0.005). The intraclass correlation coefficient was 0.776 (95% confidence interval: 0.712-0.831; p < 0.001) indicating good interrater reliability. CONCLUSION In the presence of metal implants in our cadaveric study, tin prefiltration with 150 kVp offers superior artefact reduction for low-dose CT imaging of osseous tissue compared with virtual monoenergetic images of dual-energy datasets. The delineation of cortical boundaries seems to benefit particularly from spectral shaping. IMPLICATIONS FOR PRACTICE Low-dose CT imaging of osseous tissue in combination with tin prefiltration allows for superior metal artefact reduction when compared to virtual monoenergetic images of dual-energy datasets. Employing this technique ought to be considered in daily routine when metal implants are present within the scan volume as findings suggest it allows for radiation dose reduction and facilitates diagnosis relevant to further treatment.
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Affiliation(s)
- H Huflage
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - J-P Grunz
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - C Hackenbroch
- Department of Diagnostic and Interventional Radiology and Neuroradiology, German Armed Forces Hospital Ulm, Oberer Eselsberg 40, 89081 Ulm, Germany; Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Albert-Einstein-Allee 23, 89081 Ulm, Germany.
| | - D Halt
- Department of Diagnostic and Interventional Radiology and Neuroradiology, German Armed Forces Hospital Ulm, Oberer Eselsberg 40, 89081 Ulm, Germany.
| | - K S Luetkens
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - A M Alfred Schmidt
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - T S Patzer
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - S Ergün
- Institute of Anatomy and Cell Biology, University of Würzburg, Koellikerstraße 6, 97070 Würzburg, Germany.
| | - T A Bley
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - A S Kunz
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
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Luetkens KS, Huflage H, Kunz AS, Ritschl L, Herbst M, Kappler S, Ergün S, Goertz L, Pennig L, Bley TA, Gassenmaier T, Grunz JP. The effect of tin prefiltration on extremity cone-beam CT imaging with a twin robotic X-ray system. Radiography (Lond) 2021; 28:433-439. [PMID: 34716089 DOI: 10.1016/j.radi.2021.10.009] [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: 05/30/2021] [Revised: 08/13/2021] [Accepted: 10/09/2021] [Indexed: 10/20/2022]
Abstract
INTRODUCTION While tin prefiltration is established in various CT applications, its value in extremity cone-beam CT relative to optimized spectra has not been thoroughly assessed thus far. This study aims to investigate the effect of tin filters in extremity cone-beam CT with a twin-robotic X-ray system. METHODS Wrist, elbow and ankle joints of two cadaveric specimens were examined in a laboratory setup with different combinations of prefiltration (copper, tin), tube voltage and current-time product. Image quality was assessed subjectively by five radiologists with Fleiss' kappa being computed to measure interrater agreement. To provide a semiquantitative criterion for image quality, contrast-to-noise ratios (CNR) were compared for standardized regions of interest. Volume CT dose indices were calculated for a 16 cm polymethylmethacrylate phantom. RESULTS Radiation dose ranged from 17.4 mGy in the clinical standard protocol without tin filter to as low as 0.7 mGy with tin prefiltration. Image quality ratings and CNR for tin-filtered scans with 100 kV were lower than for 80 kV studies with copper prefiltration despite higher dose (11.2 and 5.6 vs. 4.5 mGy; p < 0.001). No difference was ascertained between 100 kV scans with tin filtration and 60 kV copper-filtered scans with 75% dose reduction (subjective: p = 0.101; CNR: p = 0.706). Fleiss' kappa of 0.597 (95% confidence interval 0.567-0.626; p < 0.001) indicated moderate interrater agreement. CONCLUSION Considerable dose reduction is feasible with tin prefiltration, however, the twin-robotic X-ray system's low-dose potential for extremity 3D imaging is maximized with a dedicated low-kilovolt scan protocol in situations without extensive beam-hardening artifacts. IMPLICATIONS FOR PRACTICE Low-kilovolt imaging with copper prefiltration provides a superior trade-off between dose reduction and image quality compared to tin-filtered cone-beam CT scan protocols with higher tube voltage.
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Affiliation(s)
- K S Luetkens
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - H Huflage
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - A S Kunz
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - L Ritschl
- X-ray Products - Research & Development, Siemens Healthcare GmbH, Siemensstraße 1, 91301, Forchheim, Germany.
| | - M Herbst
- X-ray Products - Research & Development, Siemens Healthcare GmbH, Siemensstraße 1, 91301, Forchheim, Germany.
| | - S Kappler
- X-ray Products - Research & Development, Siemens Healthcare GmbH, Siemensstraße 1, 91301, Forchheim, Germany.
| | - S Ergün
- Institute of Anatomy and Cell Biology, University of Würzburg, Koellikerstraße 6, 97070 Würzburg, Germany.
| | - L Goertz
- Institute for Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Kerpener Straße 62, 50937 Cologne, Germany.
| | - L Pennig
- Institute for Diagnostic and Interventional Radiology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Kerpener Straße 62, 50937 Cologne, Germany.
| | - T A Bley
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - T Gassenmaier
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
| | - J-P Grunz
- Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Oberdürrbacher Straße 6, 97080 Würzburg, Germany.
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Gürsoy SC, Ergün S, Midi İ, Topçuoğlu V. Theory of mind and its relationship with alexithymia and quality of life in patients with psychogenic nonepileptic seizures: Comparisons with generalised epilepsy and healthy controls. Seizure 2021; 91:251-257. [PMID: 34246053 DOI: 10.1016/j.seizure.2021.06.032] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 06/21/2021] [Accepted: 06/23/2021] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE Psychogenic nonepileptic seizures (PNES) are associated with high alexithymia, social cognition problems and low quality of life (QoL). Theory of Mind (ToM) has been studied in several conditions as a significant predictor of QoL. We aimed to assess the relationship between ToM abilities, alexithymia and subjective QoL in PNES patients and compare with generalised epilepsy (ES) patients and healthy controls. METHOD Patients with PNES (n = 28), ES (n = 28) and healthy volunteers (n = 28) were evaluated for alexithymia and quality of life (QoL) with Toronto Alexithymia Scale-20 (TAS-20) and Short Form-36 (SF-36). Reading the Mind in the Eyes test was used for assessment of affective ToM and Hinting Task and Strange Stories tests for cognitive ToM abilities. RESULTS Analyses revealed lower SF-36 scores and poorer ToM performance in the PNES group compared to healthy group and poorer cognitive ToM performance than ES group. Cognitive ToM performance was inversely correlated with TAS-20 "difficulty identifying feelings" subscale and "physical functioning" subscale of SF-36 in the PNES group. CONCLUSION These results are consistent with previous research on PNES and other somatoform disorders and suggest that PNES is associated with impaired ToM task performance. ToM task performance might be related to specific aspects of alexithymia and QoL.
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Affiliation(s)
- Süha Can Gürsoy
- Marmara University Pendik Education and Research Hospital, Department of Psychiatry, Fevzi Çakmak, Muhsin Yazıcıoğlu Cd No:10, 34899 Pendik/İstanbul, Turkey.
| | - Serhat Ergün
- Marmara University Pendik Education and Research Hospital, Department of Psychiatry, Fevzi Çakmak, Muhsin Yazıcıoğlu Cd No:10, 34899 Pendik/İstanbul, Turkey
| | - İpek Midi
- Marmara University Pendik Education and Research Hospital, Deparment of Neurology, Fevzi Çakmak, Muhsin Yazıcıoğlu Cd No:10, 34899 Pendik/İstanbul, Turkey
| | - Volkan Topçuoğlu
- Marmara University Pendik Education and Research Hospital, Department of Psychiatry, Fevzi Çakmak, Muhsin Yazıcıoğlu Cd No:10, 34899 Pendik/İstanbul, Turkey
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Ergün S, Alakbarov A, Mine Ylımaz A, Karademir B, Akgün U. The Effect of Different Suture Materials on Achilles Tendon Metabolism: A Preliminary in vivo Study of mRNA levels in Rabbits. ACTA ACUST UNITED AC 2019. [DOI: 10.32098/mltj.04.2019.01] [Citation(s) in RCA: 1] [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: 11/05/2022]
Affiliation(s)
- S. Ergün
- Department of Orthopaedics Surgery, Acıbadem Mehmet Ali Aydınlar University, Istanbul, Turkey
| | - A. Alakbarov
- Department of Orthopaedics Surgery, Ersoy Hospital, Istanbul, Turkey
| | - A. Mine Ylımaz
- Department of Biochemistry, School of Medicine / Genetic and Metabolic Diseases Research and Investigation Center, Marmara University, Istanbul, Turkey
| | - B. Karademir
- Department of Biochemistry, School of Medicine / Genetic and Metabolic Diseases Research and Investigation Center, Marmara University, Istanbul, Turkey
| | - U. Akgün
- Department of Orthopaedics Surgery, Acıbadem Mehmet Ali Aydınlar University, Istanbul, Turkey
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Yanartaş Ö, Kani HT, Kani AS, Akça ZND, Akça E, Ergün S, Tezcan N, Atug Ö, İmeryüz N, Sayar K. Depression and anxiety have unique contributions to somatic complaints in depression, irritable bowel syndrome and inflammatory bowel diseases. PSYCHIAT CLIN PSYCH 2019. [DOI: 10.1080/24750573.2019.1589177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Ömer Yanartaş
- Department of Psychiatry, Marmara University School of Medicine, Istanbul, Turkey
| | - Haluk Tarik Kani
- Department of Gastroenterology, Marmara University School of Medicine, Istanbul, Turkey
| | - Ayşe Sakallı Kani
- Department of Psychiatry, Marmara University School of Medicine, Istanbul, Turkey
| | | | - Erdoğdu Akça
- Department of Psychiatry, Marmara University School of Medicine, Istanbul, Turkey
| | - Serhat Ergün
- Department of Psychiatry, Marmara University School of Medicine, Istanbul, Turkey
| | - Neslihan Tezcan
- Department of Internal Medicine, Marmara University School of Medicine, Istanbul, Turkey
| | - Özlen Atug
- Department of Gastroenterology, Marmara University School of Medicine, Istanbul, Turkey
| | - Neşe İmeryüz
- Department of Gastroenterology, Marmara University School of Medicine, Istanbul, Turkey
| | - Kemal Sayar
- Department of Psychiatry, Marmara University School of Medicine, Istanbul, Turkey
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Yilmaz S, Sova M, Ergün S. Antimicrobial activity of trans-cinnamic acid and commonly used antibiotics against important fish pathogens and nonpathogenic isolates. J Appl Microbiol 2018; 125:1714-1727. [PMID: 30179290 DOI: 10.1111/jam.14097] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/17/2018] [Accepted: 08/14/2018] [Indexed: 12/19/2022]
Abstract
AIMS Antibiotics and several other chemicals have been used to prevent fish diseases. However, this situation results in economic loss for the companies in the aquaculture industry and most importantly it pollutes the environment. Cinnamic acid is a naturally occurring aromatic acid and is considered to be safe for human consumption. Therefore, in this study, the antibacterial activity of trans-cinnamic acid and commonly used antibiotics, namely chloramphenicol, vancomycin, streptomycin and erythromycin, were tested against 32 bacteria, including fish pathogens, nonpathogenic isolates and collection strains. METHODS AND RESULTS Trans-cinnamic acid was applied against the bacteria using the disc diffusion and microdilution method under in vitro conditions. Antibiotics were also tested under similar conditions against all tested bacteria using the disc diffusion method. The results show that among 32 bacterial strains trans-cinnamic acid exhibited potent inhibitory effect on the Gram-negative fish pathogen Aeromonas sobria. In addition, a moderate inhibition of trans-cinnamic acid of fish pathogens Aeromonas salmonicida, Vibrio (Listonella) anguillarum, Vibrio crassostreae and Yersinia ruckeri was also observed for trans-cinnamic acid in our study. On the contrary, the majority of nonpathogenic intestinal isolates were resistant to trans-cinnamic acid. CONCLUSIONS To the best of our knowledge, this is the first report on the antimicrobial activity of trans-cinnamic acid on 24 of the studied bacteria isolated from fish. In conclusion, trans-cinnamic acid can be used as an environmentally friendly alternative additive to prevent and control primarily A. sobria, as well as other pathogenic bacteria such as A. salmonicida, V. anguillarum, V. crassostreae and Y. ruckeri. SIGNIFICANCE AND IMPACT OF THE STUDY This study indicated that trans-cinnamic acid may present an environmentally friendly alternative therapeutic agent against A. sobria infections in the aquaculture industry.
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Affiliation(s)
- S Yilmaz
- Department of Aquaculture, Faculty of Marine Sciences and Technology, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - M Sova
- Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - S Ergün
- Department of Aquaculture, Faculty of Marine Sciences and Technology, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
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Çeri V, Aykutlu HC, Görker I, Akça ÖF, Tarakçıoğlu MC, Aksoy UM, Kaya H, Sertdemir M, İnce E, Kadak MT, Yalçın GY, Guliyev C, Bilgiç A, Çiftçi E, Tekin K, Tuna ZO, Oğuzdoğan B, Duman NS, Semerci B, Üneri ÖŞ, Karabekiroglu K, Mutluer T, Nebioglu M, Başgül ŞS, Naharcı Mİ, Maden Ö, Hocaoğlu Ç, Durmaz O, Usta H, Boşgelmez Ş, Puşuroğlu M, Eser HY, Kaçar M, Çakır M, Karatepe HT, Işık Ü, Kara H, Yeloğlu ÇH, Yazıcı E, Gündüz A, Karataş KS, Yavlal F, Uzun N, Yazici AB, Bodur Ş, Aslan EA, Batmaz S, Çelik F, Açıkel SB, Topal Z, Altunsoy N, Tulacı ÖD, Demirel ÖF, Çıtak S, Çak HT, Artık AB, Özçetin A, Özdemir I, Çelik FGH, Kültür SEÇ, Çipil A, Ay R, Arman AR, Yazıcı KU, Yuce AE, Yazıcı İP, Kurt E, Kaçar AŞ, Erbil N, Poyraz CA, Altın GE, Şahin B, Kılıç Ö, Turan Ş, Aydın M, Kuru E, Bozkurt A, Güleç H, İnan MY, Şevik AE, Baykal S, Karaer Y, Yanartaş O, Aksu H, Ergün S, Görmez A, Yıldız M, Bag S, Özkanoğlu FK, Caliskan M, Yaşar AB, Konuk E, Altın M, Bulut S, Bulut GÇ, Tulacı RG, Küpeli NY, Enver N, Tasci İ, Kani AS, Bahçeci B, Oğuz G, Şenyuva G, Ünal GT, Yektaş Ç, Örüm MH, Göka E, Gıca Ş, Şahmelikoğlu Ö, Dinç GŞ, Erşan S, Erşan E, Ceylan MF, Hesapçıoğlu ST, Solmaz M, Balcioglu YH, Cetin M, Tosun M, Yurteri N, Ulusoy S, Karadere ME, Kivrak Y, Görmez V. Symposium Oral Presentations. PSYCHIAT CLIN PSYCH 2018. [DOI: 10.1080/24750573.2018.1464274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Affiliation(s)
- Veysi Çeri
- Marmara University Pendik Research and Training Hospital, Child and Adolescent Psychiatry Clinic, Istanbul, Turkey
| | - Hasan Cem Aykutlu
- Department of Child and Adolescent Psychiatry, Trakya University School of Medicine, Edirne, Turkey
| | - Işık Görker
- Department of Child and Adolescent Psychiatry, Trakya University School of Medicine, Edirne, Turkey
| | - Ömer Faruk Akça
- Department of Child and Adolescent Psychiatry, Necmettin Erbakan University Meram School of Medicine, Konya, Turkey
| | - Mahmut Cem Tarakçıoğlu
- Health Sciences University Kanuni Sultan Süleyman Research and Training Hospital, Istanbul, Turkey
| | - Umut Mert Aksoy
- Health Sciences University Kanuni Sultan Süleyman Research and Training Hospital, Istanbul, Turkey
| | - Heysem Kaya
- Department of Computer Engineering, Çorlu Faculty of Engineering, Namık Kemal University, Çorlu, Tekirdağ, Turkey
| | - Merve Sertdemir
- Department of Child and Adolescent Psychiatry, Necmettin Erbakan University Meram School of Medicine, Konya, Turkey
| | - Ezgi İnce
- Department of Psychiatry, Istanbul University Istanbul School of Medicine, Istanbul, Turkey
| | - Muhammed Tayyib Kadak
- Department of Child and Adolescent Psychiatry, Istanbul University Cerrahpaşa School of Medicine, Istanbul, Turkey
| | | | | | - Ayhan Bilgiç
- Department of Child and Adolescent Psychiatry, Necmettin Erbakan University Meram School of Medicine, Konya, Turkey
| | - Elvan Çiftçi
- Department of Psychiatry, Erenkoy Research and Training Hospital, Istanbul, Turkey
| | | | | | | | | | - Bengi Semerci
- Department of Psychology, Hasan Kalyoncu University, Gaziantep, Turkey
| | - Özden Şükran Üneri
- Department of Child and Adolescent Psychiatry, Yıldırım Beyazıt University School of Medicine, Ankara, Turkey
| | | | - Tuba Mutluer
- Koç University Hospital, Department of Child and Adolescent Psychiatry, Istanbul, Turkey
| | - Melike Nebioglu
- Health Sciences University, Haydarpaşa Numune Research and Training Hospital, Istanbul, Turkey
| | | | - Mehmet İlkin Naharcı
- Division of Geriatrics, Department of Internal Medicine, Health Sciences University, Ankara, Turkey
| | - Özgür Maden
- SBÜ Sultan Abdülhamid Han Education and Training Hospital, Department of Psychiatry, Istanbul, Turkey
| | - Çiçek Hocaoğlu
- Department of Psychiatry, Recep Tayyip Erdogan University School of Medicine, Rize, Turkey
| | - Onur Durmaz
- Erenköy Mental Health and Neurology Research and Training Hospital, Department of Psychiatry, Istanbul, Turkey
| | - Haluk Usta
- Erenköy Mental Health and Neurology Research and Training Hospital, Department of Psychiatry, Istanbul, Turkey
| | - Şükriye Boşgelmez
- Kocaeli Derince Research and Training Hospital, Psychiatry Clinic, Kocaeli, Turkey
| | | | - Hale Yapıcı Eser
- KOÇ University School of Medicine, Istanbul, Turkey
- KOÇ University Research Center FOR Translational Medicine (Kuttam), Istanbul, Turkey
- Koç University School of Medicine Department of Psychiatry, Istanbul, Turkey
- Koç University Research Center for Translational Medicine (KUTTAM), Istanbul, Turkey
| | - Murat Kaçar
- Department of Child and Adolescent Psychiatry, Recep Tayyip Erdogan University School of Medicine, Rize, Turkey
| | - Mahmut Çakır
- Child Psychiatry Clinic, Health Sciences University, Amasya Research and Training Hospital, Amasya, Turkey
| | - Hasan Turan Karatepe
- Department of Psychiatry, Istanbul Medeniyet University, School of Medicine, Istanbul, Turkey
| | - Ümit Işık
- Department of Child and Adolescent Psychiatry, Yozgat State Hospital, Yozgat, Turkey
| | - Halil Kara
- Department of Child and Adolescent Psychiatry, Aksaray University Research and Training Hospital, Aksaray, Turkey
| | | | - Esra Yazıcı
- Department of Psychiatry, Sakarya University School of Medicine, Sakarya, Turkey
| | - Anıl Gündüz
- Health Sciences University, Haydarpaşa Numune Research and Training Hospital, Istanbul, Turkey
| | - Kader Semra Karataş
- Recep Tayyip Erdogan University School of Medicine Psychiatry Department, Rize, Turkey
| | - Figen Yavlal
- Department of Neurology, School of Medicine, Bahcesehir University, Istanbul, Turkey
- Department of Neurology, Bahcesehir University School of Medicine, Istanbul, Turkey
| | - Necati Uzun
- Department of Child and Adolescent Psychiatry, Elazığ Psychiatry Hospital, Elazığ, Turkey
| | - Ahmet Bulent Yazici
- Department of Psychiatry, Sakarya University School of Medicine, Sakarya, Turkey
| | - Şahin Bodur
- Health Sciences University, Gulhane Research and Training Hospital, Child and Adolescent Psychiatry Clinic, Ankara, Turkey
| | - Esma Akpınar Aslan
- Department of Psychiatry, Gaziosmanpaşa University School of Medicine, Tokat, Turkey
| | - Sedat Batmaz
- Department of Psychiatry, Gaziosmanpasa University School of Medicine, Tokat, Turkey
| | - Feyza Çelik
- Department of Psychiatry, Dumlupınar University School of Medicine, Evliya Çelebi Research and Training Hospital, Kütahya, Turkey
| | - Sadettin Burak Açıkel
- Dr. Sami Ulus Research and Training Hospital, Child and Adolescent Psychiatry Department, Ankara, Turkey
| | | | | | | | - Ömer Faruk Demirel
- Department of Psychiatry, Cerrahpaşa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Serhat Çıtak
- Department of Psychiatry, Istanbul Medeniyet University, School of Medicine, Istanbul, Turkey
| | - Halime Tuna Çak
- Department of Child and Adolescent Psychiatry, Hacettepe University School of Medicine, Ankara, Turkey
| | - Abdül Baki Artık
- Department of Child and Adolescent Psychiatry, Hacettepe University School of Medicine, Ankara, Turkey
| | - Adnan Özçetin
- Department of Psychiatry, Duzce University School of Medicine, Duzce, Turkey
| | - Ilker Özdemir
- Giresun University Prof. Dr. A. İlhan Özdemir Research and Training Hospital, Giresun, Turkey
| | | | | | - Arif Çipil
- Health Sciences University, Haydarpaşa Numune Research and Training Hospital, Istanbul, Turkey
| | - Rukiye Ay
- Malatya Research and Training Hospital, Malatya, Turkey
| | - Ayşe Rodopman Arman
- Department of Child and Adolescent Psychiatry, Marmara University School of Medicine, Istanbul
| | - Kemal Utku Yazıcı
- Department of Child and Adolescent Psychiatry, Firat University School of Medicine, Elazig, Turkey
| | | | - İpek Perçinel Yazıcı
- Department of Child and Adolescent Psychiatry, Firat University School of Medicine, Elazig, Turkey
| | - Emel Kurt
- Psychiatry Clinic, Hisar Intercontinental Hospital, Istanbul, Turkey
| | - Anıl Şafak Kaçar
- Koc University, Research Center for Translational Medicine, Istanbul, Turkey
| | - Nurhan Erbil
- Department of Biophysics, Hacettepe University School of Medicine, Ankara, Turkey
| | - Cana Aksoy Poyraz
- Department of Psychiatry, Istanbul University Cerrahpaşa School of Medicine, Istanbul, Turkey
| | | | - Berkan Şahin
- Iğdır State Hospital, Child and Adolescent Psychiatry Clinic, Iğdır, Turkey
| | - Özge Kılıç
- Department of Psychiatry, Koç University Hospital, Istanbul, Turkey
| | - Şenol Turan
- Department of Psychiatry, Istanbul University Cerrahpaşa School of Medicine, Istanbul, Turkey
| | - Memduha Aydın
- Department of Psychiatry, Selçuk University School of Medicine, Konya, Turkey
| | - Erkan Kuru
- Özel Boylam Psychiatry Hospital, Ankara, Turkey
| | - Abdullah Bozkurt
- Department of Child and Adolescent Psychiatry, Konya Research and Training Hospital, Konya, Turkey
| | - Hüseyin Güleç
- Erenköy Mental Health and Neurology Research and Training Hospital, Department of Psychiatry, Istanbul, Turkey
| | | | - Ali Emre Şevik
- Department of Psychiatry, Çanakkale 18 Mart University School of Medicine, Çanakkale, Türkiye
| | - Saliha Baykal
- Department of Child and Adolescent Psychiatry, Namık Kemal University School of Medicine, Tekirdağ, Turkey
| | - Yusuf Karaer
- Department of Child and Adolescent Psychiatry, Hacettepe University School of Medicine, Ankara, Turkey
| | - Omer Yanartaş
- Department of Psychiatry, Marmara Medical School, Istanbul, Turkiye
| | - Hatice Aksu
- Department of Child and Adolescent Psychiatry, Adnan Menderes University School of Medicine, Aydın, Turkey
| | - Serhat Ergün
- Department of Psychiatry, Marmara University Pendik Research and Training Hospital, Istanbul, Turkey
| | - Aynur Görmez
- Department of Child and Adolescent Psychiatry, Istanbul Medeniyet University School of Medicine, Istanbul, Turkey
| | - Mesut Yıldız
- Department of Psychiatry, School of Medicine, Marmara University, Istanbul, Turkey
| | - Sevda Bag
- Bakirkoy Research and Training Hospital for Psychiatry, Neurology and Neurosurgery, Istanbul, Turkey
| | | | - Mecit Caliskan
- Health Sciences University, Haydarpaşa Numune Research and Training Hospital, Istanbul, Turkey
| | - Alişan Burak Yaşar
- Health Sciences University, Haydarpaşa Numune Research and Training Hospital, Istanbul, Turkey
- Behavioral Sciences Institute, Istanbul, Turkey
| | - Emre Konuk
- Health Sciences University, Haydarpaşa Numune Research and Training Hospital, Istanbul, Turkey
- Behavioral Sciences Institute, Istanbul, Turkey
| | - Murat Altın
- Istinye University Hospital, Psychiatry Clinic, Istanbul, Turkey
| | - Serkut Bulut
- Psychiatry Clinic, Health Sciences University Sakarya Research and Training Hospital, Sakarya, Turkey
| | | | - Rıza Gökçer Tulacı
- Uşak University School of Medicine Research and Training Hospital, Uşak, Turkey
| | - Neşe Yorguner Küpeli
- Department of Psychiatry, Marmara University Pendik Research and Training Hospital, Istanbul, Turkey
| | - Necati Enver
- Department of Otolaryngology, Marmara University Pendik Research and Training Hospital, Istanbul, Turkey
| | - İlker Tasci
- Health Sciences University, Gulhane School of Medicine, Department of Internal Medicine, Ankara, Turkey
| | - Ayşe Sakallı Kani
- Marmara University Pendik Research and Training Hospital, Istanbul, Turkey
| | - Bülent Bahçeci
- Department of Psychiatry, Recep Tayyip Erdogan University, Rize, Turkey
| | | | | | - Gülşen Teksin Ünal
- Bakirkoy Prof. Dr. Mazhar Osman Research and Training Hospital for Psychiatry, Neurology, and Neurosurgery, Istanbul, Turkey
| | - Çiğdem Yektaş
- Duzce University School of Medicine, Department of Child and Adolescent Psychiatry, Duzce, Turkey
| | - Mehmet Hamdi Örüm
- Department of Psychiatry, Adiyaman University School of Medicine, Adiyaman, Turkey
| | - Erol Göka
- SBÜ Ankara Numune Eğitim ve Araştırma Hastanesi
| | - Şakir Gıca
- Bakirkoy Prof. Dr. Mazhar Osman Research and Training Hospital for Psychiatry, Neurology, and Neurosurgery, Istanbul, Turkey
| | - Özge Şahmelikoğlu
- Bakirkoy Prof. Dr. Mazhar Osman Research and Training Hospital for Psychiatry, Neurology, and Neurosurgery, Istanbul, Turkey
| | - Gülser Şenses Dinç
- Department of Child and Adolescent Psychiatry, Ankara Children’s Hematology Oncology Research and Training Hospital, Ankara Turkey
| | - Serpil Erşan
- Cumhuriyet University Advanced Technology Research and Application Center, Sivas, Turkey
| | - Erdal Erşan
- Sivas Numune Hospital, Community Mental Health Center, Sivas, Turkey
| | - Mehmet Fatih Ceylan
- Department of Child and Adolescent Psychiatry, Yıldırım Beyazıt University School of Medicine, Ankara, Turkey
| | - Selma Tural Hesapçıoğlu
- Department of Child and Adolescent Psychiatry, Yıldırım Beyazıt University School of Medicine, Ankara, Turkey
| | - Mustafa Solmaz
- Health Sciences University Bagcilar Research and Training Hospital, Department of Psychiatry, Istanbul, Turkey
- Bakirkoy Prof. Mazhar Osman Training and Research Hospital for Psychiatry, Neurology, and Neurosurgery, Forensic Psychiatry Unit, Istanbul, Turkey
| | - Yasin Hasan Balcioglu
- Health Sciences University Bagcilar Research and Training Hospital, Department of Psychiatry, Istanbul, Turkey
- Bakirkoy Prof. Mazhar Osman Training and Research Hospital for Psychiatry, Neurology, and Neurosurgery, Forensic Psychiatry Unit, Istanbul, Turkey
| | | | - Musa Tosun
- Istanbul University Cerrahpaşa School of Medicine, Department of Child and Adolescent Psychiatry, Istanbul, Turkey
| | - Nihal Yurteri
- Duzce University School of Medicine, Department of Child and Adolescent Psychiatry, Duzce, Turkey
| | - Sevinc Ulusoy
- Bakirkoy Prof. Dr. Mazhar Osman Research and Training Hospital for Psychiatry and Neurology, Istanbul, Turkey
| | | | - Yüksel Kivrak
- Department of Psychiatry, Kafkas University School of Medicine, Kars, Turkey
| | - Vahdet Görmez
- Bezmialem Vakif University, Department of Child and Adolescent Psychiatry, Istanbul, Turkey
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Ergün S, Yanartaş Ö, Kandemir G, Yaman A, Yıldız M, Haklar G, Sayar K. The relationship between psychopathology and cognitive functions with cytokines in clinically stable patients with schizophrenia. PSYCHIAT CLIN PSYCH 2017. [DOI: 10.1080/24750573.2017.1380920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Serhat Ergün
- Department of Psychiatry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Ömer Yanartaş
- Department of Psychiatry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Güler Kandemir
- Department of Psychiatry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Ali Yaman
- Department of Biochemistry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Mesut Yıldız
- Department of Psychiatry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Goncagül Haklar
- Department of Biochemistry, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Kemal Sayar
- Department of Psychiatry, Faculty of Medicine, Marmara University, Istanbul, Turkey
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Şahmelikoğlu Onur Ö, Çukurova M, Bağ S, Yalçın S, Çakır Şen C, Karşıdağ Ç, Süleyman Can S, Tuğçe Akçaer E, Taşdelen Kul A, İspir M, Bakkal O, Algül A, Ebrinç S, Süleyman Can S, Taşdelen Kul A, Yükselir C, Zincir S, Öztürk P, Karaahmetoğlu B, Baş Ö, Şahmelikoğlu Onur Ö, Ulukaya S, Süleyman Can S, Soykan Ç, Çayköylü A, Taşdelen Kul A, Yazar N, Başar Kocagöz Z, Özçetin A, Bahar Ölmez S, Ataoğlu A, Hasan Balcioglu Y, Demir Berkol T, Ekim Cevik F, Oncu F, Ozgen G, Demiröz D, Yardım Özayhan H, Seven H, Çağrı Yıldız M, Başaran R, Eren İ, Özlem Canazlar E, Sevinçok L, Doğan B, Öykü Memiş Ç, Baran Tanrikulu A, İnanli̇ İ, Çağri̇ Yi̇ldi̇z M, Şerife Elmas T, Eren I, Alperen Korkmaz Ş, Pınar Şen C, Fatih Ceylan M, Hesapçıoğlu ST, Bakar B, Tuncer C, Yeni Elbay R, Görmez A, Tokgöz Y, Bolu A, Çelik C, Uzun Ö, Kirlioglu SS, Balcioglu YH, Aydin PC, Uğurlu M, Uğurlu GK, Akçaer ET, Can SS, Çayköylü A, Koç Z, Kapubağlı N, Tuncer ÖF, Ünlü G, Balcioglu YH, Kirlioglu SS, Ozgen G, Çayköylü A, Uğurlu M, Şahin EK, Uğurlu GK, Can SS, Apaydın ZK, Kaymak SU, Peker O, Can SS, Koç Z, Çayköylü A, Özkan B, Kılıçoğlu AG, Karaçetin G, Yücehan Z, Elmas TŞ, Demiröz D, Yağlı N, İlhan BÇ, Eren İ, Aker DA, Kıvılcım Y, Solmaz M, Kutlu YR, Yeşil B, Almış BH, Küçük B, Cerit C, Sarici B, Kaypak AC, Baysak E, Ergün S, Yildiz M, Ibiloglu AO, Atli A, Asoglu M, Ozkan M, Memik NÇ, Ünver H, Gündoğdu ÖY, Uzun N, Akça ÖF, Aral G, Aykut DS, Maden Ö, İspir M, Gündoğmuş İ, Algül A, Ebrinç S, Gok F, Kiraz S, Cipil A, Eroglu MZ, Çiftçi E, Aslan Z, Gül MK, Taştepe N, Demirci E, Özmen S, Doğru H, Karayağmurlu E, Karayağmurlu A, Göksu M, Tügen LE, Ayaz AB, Arman A, Başaran R, Özayhan HY, Altunova D, Demiröz D, Eren İ, Yıldız MÇ, Balcioglu YH, Kirlioglu SS, Aydin PC, Can SS, Soykan Ç, Atagün Mİ, Çayköylü A, Uğurlu GK, Kul AT, Güldaş E, Göl G, Savcı U, Tufan AE, Özbek SY, Özbek S, Uygur H, Demirel B, Esra Çiçek İ, Eren İ, Kara H, Balcı MM, Karaca S, Kuloğlu MM, Aytaç HM, Ger MC, Atli A, İbiloğlu AO, Asoğlu M, Çakır A, Aykut DS, Tiryaki A, Çelme GG, Boztaş MH, Sırmatel F, Balcioglu YH, Erdogan M, Dayan C, Atakli HD, Kartalcı G, Yücel E, Kartalcı Ş, Eroğlu MZ, Çipil A, Çalışkan M, Kaymak SU, Uğurlu GK, Peker O, Koç Z, Atagün Mİ, Çayköylü A, Çavusoglu EC, Özdemir YÖ, Çiftçi E, Atli A, İbiloğlu AO, Asoğlu M, Demiröz D, Özayhan HY, Yücehan Z, Elmas TŞ, Eren İ, Fındıklı E, Aytaç HM, Şahin B, Karabekiroğlu K, Kurt M, Memiş ÇÖ, Doğan B, Sevinçok D, Sevinçok L, Sertdemir M, Akça ÖF, Sevinçok D, Memiş ÇÖ, Doğan B, Sevinçok L, Ay R, Yılmaz N, Demirkaya SK, Aksu H, Gizem Gerçek H, Karakoç G, Altıntoprak AE, Coşkunol H, Yazici IP, Utku Yazici K, Doğru H, Kiraz S, Altıntaş K, Gök F, Eroğlu MZ, Yaylacı F, Erkuran HÖ, Eyüboğlu M, Göverti D, Yüksel RN, Bülbül A, Aydemir MÇ, Göka E, Kınalı I, Hacıoğlu MY, Kaypak AC, Sarıcı B, Baysak E, Ergün S, Sayar K, Gündoğmuş İ, İspir M, Algül A, Ebrinç S, Doğan H, Doğan H, Bağ S, Çukurova M, Akay Ö, Karşıdağ Ç, Gündoğmuş İ, Bakkal O, Algül A, Ebrinç S, Kim H, Lee H, Soykan Ç, Can SS, Çayköylü A, Kul AT, Karagöz A, Gündoğmuş İ, Kullakçı H, Maden Ö, Algül A, Ebrinç S, Can SS, Duman Y, Atagün Mİ, Kul AT, Çayköylü A, Çokünlü Y, Aydın M, Elmas TŞ, Eren İ, Tanrıkulu AB, Aydın M, Elmas TŞ, Altunova D, Eren İ, Taner HA, Sarı BA, Yektaş Ç, Samurcu ND, Tufan AE, Elmas TŞ, Çalışır S, Aydın M, Demiröz D, Tanrıkulu AB, Eren İ, Kullakçı H, İspir M, Algül A, Ebrinç S, İspir M, Gündoğmuş İ, Maden Ö, Algül A, Ebrinç S, Ekinci Ö, Tan ME, Kalınlı M, Kıyançiçek M, Gündoğmuş İ, Maden Ö, Algül A, Küçükdağ M, Yektaş Ç, Gül HK, Aykut DS, Uysal E, Arslan FC, Uysal E, Aykut DS, Gül HK, Karagüzel EÖ, Demiröz D, Özayhan HY, Seven H, Başaran R, Yıldız MÇ, Eren İ, Karakök B, Çak HT, Çankaya PK, Altun İK, Abatan E, Uysal E, Çokünlü Y, Elmas TŞ, Özbek S, Çalışkan AM, Eren İ, Çakı HK, Doğangün B, Kadak MT, Kefeli M, Arıcı A, Altun H, Acıpayam C, Bayhan PÇ, Taştepe N, Gül MK, Özmen S, Demirci E, Elmas TŞ, Çalışır S, Tanrıkulu AB, Çokünlü Y, Yıldız MÇ, Yücehan Z, Eren İ, Tan ME, Ekinci Ö, Altun İK, Çankaya PK, Uysal E, Sungur EN, İnci Kenar AN, Ersoy SA, Gürok MG, Yildiz S, Korucu T, Keles DD, Atmaca M, Hoşoğlu E, Akça ÖF, Kılınç K, Şen B, Örnek E, Çelebi C, Kani AS, Yanartaş Ö, Şenkal Z, Akvardar Y, Kora K, Egilmez Ü, Kandeğer A, Güler Ö, Yazici KU, Yazici IP, Kösker SD, Budak EA, Karasin ZD, Güleken MD, Celik M, Yazici IP, Yazici KU, Yıldırım H, Altıntoprak AE, Güler B, Veznedaroğlu B, Lale F, Çak Esen HT, Haliloğlu G, Yeşil B, Almış BH, Ekinci N, Bilgili GÖ, Tuncer C, Seneger V, Elbay RY, Görmez A, Işık Ü, Aşut G, Yaylacı ET, Asan Ö, Göka E, Güneş S, Yeşil B, Çalışkan AM, Çiftçi E, Yaşar SA, İnanlı İ, Eren İ, Altıntaş K, Kiraz S, Sertçelik S, Eroğlu MZ, Bakkal O, Gündoğmuş İ, Maden Ö, Algül A, Ebrinç S, Atli A, İbiloğlu AO, Asoğlu M, Avci SH, Görmez A, Tuncer C, Seneger V, Gündoğmuş İ, İspir M, Maden Ö, Algül A, Ebrinç S, Altıntaş K, Yaşar AB, Sertçelik S, Tuncer C, Bakar B, Karatepe HT, Elbay RY, Dönmez M, Topçuoğlu V, Yanartaş Ö, Sertdemir M, Bilgiç A, Doğru H, Doğru V, Bozkurt A, Şahin B, Karabekiroğlu K, Kalyoncu T, Çıldır DA, Beşer C, Fiş NP, Güneş S, Ulgar ŞB, Ayaydın H, Takatak H, Ayaydin H, Çobanoğlu C, Müjdeci M, Şahin B, Gümüş YY, Kalınlı M, Ekinci Ö, Güneş S, Akbaş B, Akça ÖF, Doğru H, Sevgen FH, Altun H, Aytaç HM, Öncü F, Şahin N, Balkan D, Coşkun F, Yılmaz S, Akça ÖF, Çelikkol Ç, Yılmaz S, Emlik GD, Çaksen H, Arslan D, Arısoy Ö, Şair A, Şair YB, Sarı D, Ispir M, Algul A, Ebrinç S, Ölmeztoprak VK, Zayman EP, Ünal S, Demiröz D, Özayhan HY, Yaşar SA, Öztürk AH, Eren İ, Karabucak B, Çengel Kültür ES, Çak Esen TH, Çipil A, Eroğlu MZ, Yaşar AB, Çalışkan M, Yaylacı F, Erkuran HÖ, Eroğlu MZ, Çalışkan M, Kiraz S, Çipil A, Özaktaç İF, Altın M, Sarıdoğan AS, Buluş E, Bülbül A, Güneş S, Yüksel RN, Aydemir MÇ, Göka E, Ayaydın H, Takatak H, Koyuncu Z, Kadak MT, Bingöl RH, Doğangün B, Uzgel M, Ayas S, Kıvrak Y, Şahbal Y, Kocagöz K, Aykut DS, Kutlu G, Baz A, Göl G, Güldaş E, Cansız MA, Tufan AE, Çıldır DA, Kalyoncu T, Duman Y, Can SS, Soykan Ç, Kul AT, Sağlam E, Akça ÖF, Önen Ö, Kutlu A, Erkuran HÖ, Erkuran HÖ, Aşık EA, Sapmaz ŞY, Kalyoncu T, Çıldır DA, Erermiş S, Ünver H, Şişmanlar ŞG, Karka İ, Kilicaslan F, Asoglu M, Hürmeydan CE, Onur ÖŞ, Bağ S, Yalçın S, Onur OS, Sarı DN, Kılıç B, Kurt EM, Ak İ, Şevik AE, Yalçın AD, Tural Ü, Yaşar H, Can SS, Duman Y, Çayköylü A, Korkmaz ŞA, Uğurlu GK, Kul AT, Balcioglu YH, Kirlioglu SS, Ozgen G, Altunova D, Başaran R, Yıldız MÇ, Tanrıkulu AB, Karaaslan M, Eren İ, Kizilağaç F, Tural Ü, Tokgöz Y, Öznur T, Çelik C, Uzun Ö, Baran Tanri̇kulu A, Yildiz MÇ, İnanli İ, Elmas TŞ, Çokünlü Y, Öztürk SS, Seven H, Demiröz D, Özbek S, Çiçek İE, Eren İ, Zayman EP, Karlıdağ R, Akan M, İnce LU, Reyhani İ, Tetik DÇ, Büyükaslan A, Yılanlı M, Cesur E, Bağ S, Karşıdağ Ç, Balcioglu YH, Kirlioglu SS, Oncu F, Belger F, Başay BK, Seneger V, Tuncer C, Karatepe HT, Görmez A, Şen CP, Ceylan MF, Hesapcioglu ST, Elmas TŞ, Çalışır S, Çalışkan AM, Tanrıkulu AB, Eren İ, Ibiloglu AO, Atli A, Asoglu M, Ozkan M, Onur ÖŞ, Cesur E, Teksin G, Yalçın S, Bağ S, Güneş S, Çalışkan AM, Çiftçi E, Yaşar SA, İnanlı İ, Eren İ, Baysak E, Kupeli NY, Ergun S, Kora K, Asoğlu M, Takatak H, Atlı A, Okan İbiloğlu A, Asoğlu M, Akıl Ö, Atlı A, İbilioğlu AO. 9th International Congress on Psychopharmacology & 5th International Symposium on Child and Adolescent Psychopharmacology. PSYCHIAT CLIN PSYCH 2017. [DOI: 10.1080/24750573.2017.1308709] [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: 10/19/2022] Open
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Yuksel ME, Tarakçıoğlu MC, Kılıçoğlu AG, Işık Ü, Bahçeci B, Elbay RY, Karataş KS, Bodur Ş, Onur ÖŞ, Yasar AB, Uytun MÇ, Erbay LG, Yıldız M, Özcan Ö, Göka E, Özcan Ö, Ay R, Bağ S, Yanartaş Ö, Demirel ÖF, Tosun M, Kani AS, Altun H, Yazici KU, Tuna Çak H, Yazici IP, Kılıç BG, Uzun N, Kara H, Altın GE, Çakmak FH, Altın GE, Yılmaz R, Çetinkaya M, Sertçelik S, Yalçın Ö, Yalçın Ö, Zayman EP, Şahin N, Gümüştaş F, Kültür EÇ, Ergün S, Nasıroğlu S, Açıkel SB, Üneri ÖŞ, Gül H, Üneri ÖŞ, Altın M, Özkanoğlu FK, Usta ZE, Coşkun GN, Görmez A, Coşkun K, Doğan H, Yulaf Y, Karatepe HT, Demir AÇ, Karatepe HT, Küpeli NY, Karatepe HT, Demir AÇ, Güneş H, Kılıç Ö, Gül A, Ulusoy S, Tufan AE, Öztanrıöver S, Yildiz M, Yildiz M, Öztop D, Semerci B, Gormez V, Gürbüz FŞ, Ünal GT, Akça ÖF, Kayhan Bahalı M, Varlık DS, Tan O, Taşkıran S, Taşkıran S, Kartalcı Ş, Özmen S, Demirci E, Göka E, Cenker ÖÇ, Ceylan MF, Memis CO, Polat S, Hesapçıoğlu ST, Doğan H, Ercan AC, Varlik C, Ercan AC, Aksu H, Coşkun K, Doğan B, Mutluer T, Solmaz M, Tuncer C, Çeri V, Çeri V, Öztop D, Uyar T, Uyar T, Bulut S, Kuloğlu M, Güngör İ, Mandova R. 9th International Congress on Psychopharmacology & 5th International Symposium on Child and Adolescent Psychopharmacology. PSYCHIAT CLIN PSYCH 2017. [DOI: 10.1080/24750573.2017.1314599] [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: 10/19/2022] Open
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Röhrig F, Vorlová S, Hoffmann H, Wartenberg M, Escorcia FE, Keller S, Tenspolde M, Weigand I, Gätzner S, Manova K, Penack O, Scheinberg DA, Rosenwald A, Ergün S, Granot Z, Henke E. VEGF-ablation therapy reduces drug delivery and therapeutic response in ECM-dense tumors. Oncogene 2016; 36:1-12. [PMID: 27270432 PMCID: PMC5237662 DOI: 10.1038/onc.2016.182] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 02/29/2016] [Accepted: 04/08/2016] [Indexed: 01/04/2023]
Abstract
The inadequate transport of drugs into the tumor tissue caused by its abnormal vasculature is a major obstacle to the treatment of cancer. Anti-vascular endothelial growth factor (anti-VEGF) drugs can cause phenotypic alteration and maturation of the tumor's vasculature. However, whether this consistently improves delivery and subsequent response to therapy is still controversial. Clinical results indicate that not all patients benefit from antiangiogenic treatment, necessitating the development of criteria to predict the effect of these agents in individual tumors. We demonstrate that, in anti-VEGF-refractory murine tumors, vascular changes after VEGF ablation result in reduced delivery leading to therapeutic failure. In these tumors, the impaired response after anti-VEGF treatment is directly linked to strong deposition of fibrillar extracellular matrix (ECM) components and high expression of lysyl oxidases. The resulting condensed, highly crosslinked ECM impeded drug permeation, protecting tumor cells from exposure to small-molecule drugs. The reduced vascular density after anti-VEGF treatment further decreased delivery in these tumors, an effect not compensated by the improved vessel quality. Pharmacological inhibition of lysyl oxidases improved drug delivery in various tumor models and reversed the negative effect of VEGF ablation on drug delivery and therapeutic response in anti-VEGF-resistant tumors. In conclusion, the vascular changes after anti-VEGF therapy can have a context-dependent negative impact on overall therapeutic efficacy. A determining factor is the tumor ECM, which strongly influences the effect of anti-VEGF therapy. Our results reveal the prospect to revert a possible negative effect and to potentiate responsiveness to antiangiogenic therapy by concomitantly targeting ECM-modifying enzymes.
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Affiliation(s)
- F Röhrig
- Institute of Anatomy and Cell Biology, Universität Würzburg, Würzburg, Germany.,Institute of Experimental Biomedicine, Universitätsklinikum Würzburg, Würzburg, Germany.,Graduate School of Life Science, Universität Würzburg, Würzburg, Germany
| | - S Vorlová
- Institute of Experimental Biomedicine, Universitätsklinikum Würzburg, Würzburg, Germany
| | - H Hoffmann
- Institute of Anatomy and Cell Biology, Universität Würzburg, Würzburg, Germany.,Institute of Experimental Biomedicine, Universitätsklinikum Würzburg, Würzburg, Germany.,Graduate School of Life Science, Universität Würzburg, Würzburg, Germany
| | - M Wartenberg
- Institute of Pathology, Universität Würzburg, and Comprehensive Cancer Center Mainfranken (CCCMF), Würzburg, Germany
| | - F E Escorcia
- Molecular Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - S Keller
- Institute of Anatomy and Cell Biology, Universität Würzburg, Würzburg, Germany
| | - M Tenspolde
- Institute of Anatomy and Cell Biology, Universität Würzburg, Würzburg, Germany
| | - I Weigand
- Institute of Anatomy and Cell Biology, Universität Würzburg, Würzburg, Germany
| | - S Gätzner
- Institute of Experimental Biomedicine, Universitätsklinikum Würzburg, Würzburg, Germany
| | - K Manova
- Molecular Cytology Core Facility, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - O Penack
- Medizinische Klinik mit Schwerpunkt Hämatologie, Onkologie und Tumorimmunologie Universitätsklinikum Charité, Berlin, Germany
| | - D A Scheinberg
- Molecular Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - A Rosenwald
- Institute of Pathology, Universität Würzburg, and Comprehensive Cancer Center Mainfranken (CCCMF), Würzburg, Germany
| | - S Ergün
- Institute of Anatomy and Cell Biology, Universität Würzburg, Würzburg, Germany
| | - Z Granot
- Department of Developmental Biology and Cancer Research, Institute for Medical Research Israel-Canada and Hebrew University-Hadassah Medical School, Jerusalem, Israel
| | - E Henke
- Institute of Anatomy and Cell Biology, Universität Würzburg, Würzburg, Germany.,Institute of Experimental Biomedicine, Universitätsklinikum Würzburg, Würzburg, Germany.,Graduate School of Life Science, Universität Würzburg, Würzburg, Germany
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14
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Deniz Acar R, Bulut M, Ergün S, Yesin M, Alıcı G, Akçakoyun M. Effect of cardiac rehabilitation on left atrial functions in patients with acute myocardial infarction. Ann Phys Rehabil Med 2014; 57:105-13. [PMID: 24582694 DOI: 10.1016/j.rehab.2014.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [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: 08/27/2013] [Revised: 01/16/2014] [Accepted: 01/16/2014] [Indexed: 12/01/2022]
Abstract
BACKGROUND The objective of this study was to analyze the effects of cardiac rehabilitation (CR) on the atrial function of patients with acute myocardial infarction (AMI) who had been successfully revascularized through percutaneous coronary intervention (PCI). METHODS Forty-two AMI patients having undergone CR were enrolled in this observational study. Assessments were performed before and after 6 weeks of CR. Left atrial strain analysis was carried out by two-dimensional speckle tracking echocardiography. Left ventricular ejection fraction (LVEF) was measured by the biplane Simpson's method. Pulsed-wave Doppler at the tip of mitral valve leaflets enabled us to measure early (E) and late (A) diastolic filling velocities, deceleration time (DT) of early filling velocity and isovolumic relaxation time (IVRT). Left ventricle tissue velocity was measured by tissue Doppler imaging of the lateral mitral annulus (e') and E/e' was subsequently calculated. Ratio of E/e' to left atrium (LA) peak strain was used to estimate LA stiffness. RESULTS Following CR, LVEF (P=0.010), LA strain (P<0.001) and LA stiffness (P=0.013) all showed improvement, while other parameters remained unchanged. CONCLUSION Post-AMI cardiac rehabilitation and revascularization by PCI might have favourable effects on LA function.
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Affiliation(s)
- R Deniz Acar
- Kartal Kosuyolu Education and Research Hospital, Cardiology Department, Mevlanakapi Mah. Dingil Sok. No: 23/5, Sehremini/Fatih, Istanbul, Turkey.
| | - M Bulut
- Kartal Kosuyolu Education and Research Hospital, Cardiology Department, Mevlanakapi Mah. Dingil Sok. No: 23/5, Sehremini/Fatih, Istanbul, Turkey
| | - S Ergün
- Kartal Kosuyolu Education and Research Hospital, Cardiology Department, Mevlanakapi Mah. Dingil Sok. No: 23/5, Sehremini/Fatih, Istanbul, Turkey
| | - M Yesin
- Kartal Kosuyolu Education and Research Hospital, Cardiology Department, Mevlanakapi Mah. Dingil Sok. No: 23/5, Sehremini/Fatih, Istanbul, Turkey
| | - G Alıcı
- Kartal Kosuyolu Education and Research Hospital, Cardiology Department, Mevlanakapi Mah. Dingil Sok. No: 23/5, Sehremini/Fatih, Istanbul, Turkey
| | - M Akçakoyun
- Kartal Kosuyolu Education and Research Hospital, Cardiology Department, Mevlanakapi Mah. Dingil Sok. No: 23/5, Sehremini/Fatih, Istanbul, Turkey
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15
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Hartert M, Senbaklavaci Ö, Schuon R, Taspinar H, Ergün S, Mann W, Vahl CF. Successful relocation of an infected tracheostomy at the level of the inferior manubrium sterni: No mission impossible. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297900] [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: 10/14/2022]
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16
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Tilki D, Irmak S, Turan Z, Seitz M, Reich O, Stief C, Ergün S. UP-01.036 Urinary Protein Patterns Discriminate Bladder Cancer Patients from Healthy Subjects. Urology 2011. [DOI: 10.1016/j.urology.2011.07.588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Güroy D, Güroy B, Merrifield DL, Ergün S, Tekinay AA, Yiğit M. Effect of dietary Ulva and Spirulina on weight loss and body composition of rainbow trout, Oncorhynchus mykiss (Walbaum), during a starvation period. J Anim Physiol Anim Nutr (Berl) 2010; 95:320-7. [PMID: 20880289 DOI: 10.1111/j.1439-0396.2010.01057.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A study was conducted to determine the effect of dietary algal supplementation on weight loss and proximate composition in rainbow trout, Oncorhynchus mykiss, during starvation. An algae-free control diet (C) and four experimental diets, including varying levels of raw Ulva meal (5% = U5; 10% = U10) and Spirulina meal (5% = S5; 10% = S10) were formulated. Fish were fed to satiation for 12 weeks and then subjected to a 3-week starvation period. Body weight, viscerosomatic index (VSI, %), hepatosomatic index (HSI, %), dress-out (DO, %) and chemical composition of carcass were analysed at the end of each starvation week. The accumulated weight loss of the fish fed dietary algae was almost 50% less than the control group (p < 0.05) after 2 and 3 weeks starvation. No significant differences in weight loss were observed among the fish fed different algal diets during the starvation period. Total body protein and ash contents remained constant in all groups throughout the starvation period. Fish in all treatments lost a significant level of total lipids and changes of liver fatty acid profiles were also observed. Results indicate that low level inclusion of algae in aquafeeds may have economical advantages in terms of reducing weight loss in fish when subjected to a short-term fasting period, that sometimes is necessary after a heavy rainfall or when fish stocks are held back to meet market demand.
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Affiliation(s)
- D Güroy
- Department of Aquaculture, Armutlu Vocational College, University of Yalova, Yalova, Turkey.
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18
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Nagy N, Freudenberger T, Jastrow H, Suvorava T, Kojda G, Weber A, Ergün S, Fischer J. MS362 PHARMACOLOGIC INHIBITION OF HYALURONAN SYNTHESIS CAUSES LOSS OF ENDOTHELIAL GLYCOCALYX AND AGGRAVATES ATHEROSCLEROSIS. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)70863-1] [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: 10/19/2022]
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19
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Slevogt H, Singer B, Scheffrahn I, Bachmann S, Heinrich A, Suttorp N, Ergün S, Riesbeck K. Expression pattern of CEA-related cell adhesion molecules in human pulmonary epithelia in relation to inflammatory stimuli and to the interaction with Moraxella catarrhalis. Pneumologie 2010. [DOI: 10.1055/s-0030-1251207] [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: 10/19/2022]
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20
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Abstract
OBJECTIVES Primary hyperparathyroidism (HPT) is a condition caused by an overproduction of parathormone, in excess of the amount required by the body. Its most common cause is a parathyroid gland adenoma and parathyroidectomy is currently the only curative treatment for primary HPT. We present a case history of a 65-year-old patient who was diagnosed with primary HPT after the recognition of dental problems. METHODS Dental complaints of the patient alerted the dentists, and the patient was referred for further medical evaluation. In addition to his current medical status, his medical records including the biochemical parameters of bone metabolism recorded between 2001 and 2006 were reviewed. The panoramic films of the patient obtained between 1997 and 2008 were also assessed with the fractal analysis method. RESULTS After consideration of the radiographical, biochemical and clinical evaluations of the patient, the final diagnosis was made as hyperparathyroid adenoma and surgical removal was scheduled. Soon after surgery, alkaline phosphatase, calcium and intact parathormone levels returned to normal. The fractal analysis value of the mandibular alveolar bone also increased. CONCLUSIONS Dentoalveolar changes observed in HPT include alveolar bone demineralization. The fractal dimension (FD) analysis of the bone tissue has been introduced as an alternative method to investigate the quality of the alveolar bone. FD values of the patient showed osteoporotic bone characteristics between 1997 and 2006 until the date of parathyroidectomy. Mandibular bone FD analyses revealed a prominent development, which was also observed in dual energy X-ray absorptiometry values.
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Affiliation(s)
- S Ergün
- Department of Oral Diagnosis and Radiology, Ege University School of Dentistry, Izmir, Turkey.
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21
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22
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Ergün S, Güneri P, İlgüy D, İlgüy M, Boyacıoğlu H. How many times can we use a phosphor plate? A preliminary study. Dentomaxillofac Radiol 2009; 38:42-7. [PMID: 19114423 DOI: 10.1259/dmfr/61622880] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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23
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Tilki D, Singer B, Seitz M, Stief CG, Ergün S. [Molecular imaging of tumor blood vessels]. Urologe A 2008; 46:1266-71. [PMID: 17639291 DOI: 10.1007/s00120-007-1516-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
In the past three decades many efforts have been undertaken to understand the mechanisms of tumor angiogenesis. The introduction of the anti-angiogenic drugs in tumor therapy during the last few years necessitates the establishment of new techniques enabling molecular imaging of vascular remodeling. Tumor imaging by X-ray, CT, MRI and ultrasound has to be improved by coupling with molecular markers targeting the tumor vessels. The determination of tumor size as commonly used is not appropriate since the extended necrosis under anti-angiogenic therapy does not result in a reduction of tumor diameter. But remodeling of the tumor vessels under anti-angiogenic therapy obviously occurs at an early stage and seems to be a convincing parameter for tumor imaging. Despite the enormous progress in this field during the last few years the resolution is still not high enough to evaluate the remodeling of the microtumor vessels. Thus, new imaging approaches are needed to overcome this issue.
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Affiliation(s)
- D Tilki
- Urologische Klinik und Poliklinik, Klinikum der Ludwig-Maximilians-Universität, München
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24
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Bruns T, Ergün S, Born O, Tauber R. Skrotale Spermaticaphlebographie bei linksseitiger idiopathischer Varikozele testis - Die Bedeutungder der Gefäßvariationen für die antegrade Sklerosierung. Aktuelle Urol 2008. [DOI: 10.1055/s-2008-1055611] [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: 10/21/2022]
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25
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Hansen-Algenstaedt N, Algenstaedt P, Schaefer C, Hamann A, Wolfram L, Cingöz G, Kilic N, Schwarzloh B, Schroeder M, Joscheck C, Wiesner L, Rüther W, Ergün S. Neural driven angiogenesis by overexpression of nerve growth factor. Histochem Cell Biol 2005; 125:637-49. [PMID: 16315017 DOI: 10.1007/s00418-005-0111-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/25/2005] [Indexed: 12/12/2022]
Abstract
Mechanisms regulating angiogenesis are crucial in adjusting tissue perfusion on metabolic demands. We demonstrate that overexpression of nerve growth factor (NGF) in brown adipose tissue (BAT) of NGF-transgenic mice elevates both mRNA and protein levels of vascular endothelial growth factor (VEGF) and VEGF-receptors. Increased vascular permeability, leukocyte-endothelial interactions (LEI), and tissue perfusion were measured using intravital microscopy. NGF-stimulation of adipocytes and endothelial cells elevates mRNA expression of VEGF and its receptors, an effect blocked by NGF neutralizing antibodies. These data suggest an activation of angiogenesis as a result of both: stimulation of adipozytes and direct mitogenic effects on endothelial cells. The increased nerve density associated with vessels strengthened our hypothesis that tissue perfusion is regulated by neural control of vessels and that the interaction between the NGF and VEGF systems is the critical driver for the activated angiogenic process. The interaction of VEGF- and NGF-systems gives new insights into neural control of organ vascularization and perfusion.
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Affiliation(s)
- N Hansen-Algenstaedt
- Department of Orthopedic Surgery, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany.
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26
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Mühlhausen C, Ergün S, Strauss KA, Koeller DM, Crnic L, Woontner M, Goodman SI, Ullrich K, Braulke T. Vascular dysfunction as an additional pathomechanism in glutaric aciduria type I. J Inherit Metab Dis 2004; 27:829-34. [PMID: 15505389 DOI: 10.1023/b:boli.0000045766.98718.d6] [Citation(s) in RCA: 20] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The metabolic hallmark of glutaric aciduria type I (GA I) is the deficiency of glutaryl-CoA dehydrogenase (GCDH) with subsequent accumulation of glutaric acid, 3-hydroxglutaric acid (3-OH-GA) and glutaconic acid. Current concepts regarding pathomechanisms of GA I focus on investigations of excitotoxic effects of 3-OH-GA. To identify pathogenetically relevant genes, microarray analyses were performed using brain material from GCDH-deficient (GCDH (-/-)) and control mice. These microarray data confirmed recent pathogenic models, but also revealed alterations in genes that had previously not been correlated to the disease, e.g. genes concerning vascular biology. Subsequent in vitro and in vivo experiments confirmed direct effects of 3-OH-GA on vascular permeability and endothelial integrity. Clinical observations underscore the involvement of vascular dysfunction. In MRI scans of GA I patients, subdural effusions as well as dilated transarachnoid vascular plexuses were detected independently of encephalopathic crises. In fact, some of these findings are already detectable shortly after birth. MRI scans of a GA I patient performed during an acute encephalopathic crisis detected a dilated intrastriatal vasculature with perivascular hyperintensity, indicating local extravasation. In conclusion, we hypothesize that 3-OH-GA affects prenatal development of vessels, thus leading to an increased vulnerability of endothelial structures and subsequent vascular dysfunction. These observations display an additional pathomechanism in GA I and might explain frontotemporal hypoplasia and chronic subdural effusions in this disease. Elucidation of the pathomechanisms of vascular dysfunction may give further insights into the pathogenesis of GA I.
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Affiliation(s)
- C Mühlhausen
- Department of Paediatrics, University Medical Center, D-20246 Hamburg, Germany
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27
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Kilic N, Lauke H, Fiedler W, Pottek T, Kilic E, Freeman MR, Ergün S. Angiogenic switch and vascular stability in human Leydig cell tumours. Angiogenesis 2003; 3:231-40. [PMID: 14517422 DOI: 10.1023/a:1009081101314] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The high degree of vascularisation, accompanied by the low malignancy of human Leydig cell tumours, offers an interesting model to study the neovascularisation and structural stabilisation of the vascular wall. We report here that Leydig cell tumours are characterised by an increased level of vascular endothelial growth factor (VEGF) in testicular veins, the presence of VEGF mRNA and of its receptor, KDR, and an absence of detectable VEGF receptor Flt-1, in blood vessels of tumour marginal zones and of peri-tumour areas. This is in contrast to the capillaries within normal Leydig cell clusters which demonstrate both Flt-1 and KDR. Ultrastructural destabilisation of the vascular wall, evident as a lack of basement membrane and of peri-endothelial cells was also present in nearly 85% of blood vessels of the peri-tumour areas. In contrast, approximately 89% of the blood vessels of the tumour centre region demonstrated a stabilised vascular wall including basement membrane and peri-endothelial cells. Local application of VEGF(165) to the normal testicular tissue induced significant ultrastructural destabilisation in the capillary walls which only expressed KDR. These results suggest an autocrine role of VEGF on endothelial cells of tumour blood vessels in a region-specific manner and implicate that VEGF interactions with KDR, in the absence of Flt-1, may be involved in vascular destabilisation. In addition, the finding that most (79%) of Leydig tumour blood vessels are stabilised may account for the low malignant potential of these tumours.
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Affiliation(s)
- N Kilic
- Department of Anatomy, University Hospital Eppendorf, Hamburg, Germany
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28
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Ergün S, Kilic N, Wurmbach JH, Ebrahimnejad A, Fernando M, Sevinc S, Kilic E, Chalajour F, Fiedler W, Lauke H, Lamszus K, Hammerer P, Weil J, Herbst H, Folkman J. Endostatin inhibits angiogenesis by stabilization of newly formed endothelial tubes. Angiogenesis 2002; 4:193-206. [PMID: 11911017 DOI: 10.1023/a:1014027218980] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [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: 01/08/2023]
Abstract
Endostatin decreased vascular endothelial growth factor (VEGF)-induced formation of endothelial tubes and microvessels sprouting from aortic rings and blocked their network. After cessation of treatment, the survival time of endostatin plus VEGF-treated tubes was approximately doubled in comparison to VEGF alone. Endostatin antibody blocked VEGF-induced endothelial tube formation and disrupted existing tubes. Endostatin immunostaining was localized between endothelium and basement membrane and in inter-endothelial junctions of new, but not of quiescent, blood vessels. In tumors grown in SCID mice, endostatin immunostaining was stronger accompanying blood vessel maturation and was significantly prominent in vessels of tumor marginal zone where angiogenesis is highly active. These data indicate a new antiangiogenic action of endostatin stabilizing and maturating endothelial tubes of newly formed blood vessels. Thus, strategies accelerating vascular stabilization and maturation could be promising in tumor therapy.
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MESH Headings
- Angiogenesis Inhibitors/pharmacology
- Angiogenesis Inhibitors/therapeutic use
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/pharmacology
- Aorta, Thoracic
- Basement Membrane/chemistry
- Chemotaxis/drug effects
- Collagen/antagonists & inhibitors
- Collagen/genetics
- Collagen/pharmacology
- Collagen/physiology
- Collagen/therapeutic use
- Colonic Neoplasms/pathology
- Endostatins
- Endothelial Growth Factors/antagonists & inhibitors
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/ultrastructure
- Female
- Fibroblast Growth Factor 2/antagonists & inhibitors
- Humans
- Intercellular Junctions/chemistry
- Intercellular Signaling Peptides and Proteins
- Lymphokines/antagonists & inhibitors
- Male
- Mice
- Mice, SCID
- Morphogenesis
- Neovascularization, Pathologic/drug therapy
- Neovascularization, Pathologic/metabolism
- Neovascularization, Pathologic/pathology
- Neovascularization, Physiologic/drug effects
- Organ Culture Techniques
- Peptide Fragments/antagonists & inhibitors
- Peptide Fragments/genetics
- Peptide Fragments/pharmacology
- Peptide Fragments/physiology
- Peptide Fragments/therapeutic use
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- RNA, Neoplasm/biosynthesis
- RNA, Neoplasm/genetics
- Rats
- Rats, Wistar
- Recombinant Fusion Proteins/pharmacology
- Recombinant Fusion Proteins/therapeutic use
- Testicular Neoplasms/metabolism
- Testicular Neoplasms/pathology
- Testis/metabolism
- Vascular Endothelial Growth Factor A
- Vascular Endothelial Growth Factors
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Affiliation(s)
- S Ergün
- Department of Anatomy, University Hospital Eppendorf, Hamburg, Germany.
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29
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Dührsen U, Martinez T, Vohwinkel G, Ergün S, Sun L, McMahon G, Dürig J, Hossfeld DK, Fiedler W. Effects of vascular endothelial and platelet-derived growth factor receptor inhibitors on long-term cultures from normal human bone marrow. Growth Factors 2001; 19:1-17. [PMID: 11678206 DOI: 10.3109/08977190109001072] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Endothelial cells and fibroblasts are important constituents of the haemopoietic microenvironment. Growth and function of these cells are controlled by a variety of cytokines, including vascular endothelial growth factor (VEGF) and platelet-derived growth factor (PDGF). We analysed the effects of novel tyrosine kinase inhibitors targeting the VEGF and PDGF receptors (compounds SU5614 and SU5768) on the performance of long-term cultures from normal human bone marrow. In developing cultures, the inhibitors induced a dose-dependent reduction in stromal fibroblasts, macrophages and endothelial cells with a concomitant decrease in blood cell production and an increase in fat cells. For SU5614, the concentration inhibiting stroma formation by 50% (IC50) was 123nM, and the IC50 for haemopoietic colony forming cell output was 186 nM. For SU5768, the respective values were 871 nM and 331 nM. Changes in stroma composition and inhibition of haemopoietic cell production were also demonstrable after delayed addition of the inhibitors to established cultures. By contrast, haemopoietic colony formation in clonogenic agar cultures was unimpaired (IC50 not reached at 100 microM). Immunofluorescence studies and time course analyses suggested that the primary effect of the inhibitors was interference with the proliferation and function of fibroblasts and endothelial cells which in turn resulted in decreased haemopoiesis and increased adipogenesis. This was associated with decreased levels in conditioned media of granulocyte-macrophage colony-stimulating factor, interleukin-6 and leptin. VEGF and PDGF may play a hitherto underestimated role in the control of blood cell formation. VEGF/PDGF receptor inhibitors may have therapeutic potential in stroma diseases such as myelofibrosis. Since they weaken the stimulatory signals provided by the microenvironment, they may also be of value in the treatment of leukaemia and other neoplastic bone marrow diseases.
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Affiliation(s)
- U Dührsen
- Zentrum für Innere Medizin, Abteilung für Hämatologie, Universitätsklinikum Essen, Germany.
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30
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Kilic N, Ergün S. Methods to evaluate the formation and stabilization of blood vessels and their role in tumor growth and metastasis. Methods Mol Med 2001; 58:125-148. [PMID: 21340854 DOI: 10.1385/1-59259-137-x:125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
It is becoming more and more clear that angiogenic mechanisms leading to structural formation of blood vessels are very complex, and understanding them depends on studies performed by means of a wide methodological spectrum ranging from molecular biological techniques to morphological analyses (1-4). To study the maturation and stabilization of newly formed blood vessels, processes that include many successive steps, the following aspects and methods are important: 1. Examination of structural components of the vascular wall indicating vascular stabilization by means of light and electron microscopy. 2. Immunohistochemical and immune electron microscopic studies on tissues and cells with improved methods for precise localization of angiogenic factors during vascular maturation. 3. Chemotactic assay on human endothelial cells using the Boyden chamber to test their migration response to angiogenesis activators and inhibitors. 4. Three-dimensional endothelial tube formation assay on collagen gel: an in vitro angiogenesis model. 5. Chorioallantoic membrane (CAM) assay as an easy in vivo angiogenesis assay.
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Affiliation(s)
- N Kilic
- Department of Clinical Chemistry, University Hospital Hamburg-Eppendorf, Hamburg, Germany
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Abstract
The carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1), a member of the immunoglobulin superfamily, is expressed in microvessels of proliferating tissues such as endometrium, in tissues after wounding, and in solid human tumors. In microvascular human endothelial cells, purified native and recombinant CEACAM1 stimulates proliferation, chemotaxis, and tube formation. In the chorioallantoic membrane of the chicken, CEACAM1 induces angiogenesis. The angiogenic effects of CEACAM1 are additive to those of the vascular endothelial growth factor (VEGF). The expression of CEACAM1 is up-regulated by VEGF, and VEGF-induced in vitro tube formation is blocked completely by a monoclonal CEACAM1 antibody. These findings indicate that CEACAM1 is an angiogenic factor and an effector of VEGF.
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Affiliation(s)
- C Wagener
- Department of Clinical Chemistry, Institute of Anatomy, University Hospital Hamburg-Eppendorf, Martinistrasse 52, Hamburg, D-20251, Germany.
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32
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Wurmbach JH, Hammerer P, Sevinc S, Huland H, Ergün S. The expression of angiopoietins and their receptor Tie-2 in human prostate carcinoma. Anticancer Res 2000; 20:5217-20. [PMID: 11326698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
BACKGROUND Angiopoietin-1 and angiopoietin-2 are antagonist angiogenic factors acting via the same receptor Tie-2. Their role in prostate carcinoma (PCa) is not known. MATERIAL AND METHODS Using immunohistochemistry, localization of angiopoietin-1, angiopoietin-2 and their receptor Tie-2 was studied in normal human prostate and PCa. RESULTS Few epithelial cells of normal prostate expressed angiopoietin-1 and Tie-2 but not angiopoietin-2. Normal prostate blood vessels were negative. In PCa, intraductal grown tumor cells showed angiopoietin-1 but not angiopoietin-2. Blood vessels close to the ducts and some apical tumor cells expressed angiopoietin-1 and Tie-2. In glandular PCa, most of the tumor and intraglandular stromal cells were positive for both angiopoietin-1 and angiopoietin-2. Angiopoietin-1 and angiopoietin-2 were also found in tumor capillaries. Additionally, angiopoietin-2 was expressed in smooth muscle cells of intratumoral blood vessels which also exhibited Tie-2. CONCLUSIONS The results presented indicate a role of angiopoietin-Tie-2 system, particularly of angiopoietin-2 in the vascularization of PCa.
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Affiliation(s)
- J H Wurmbach
- Department of Anatomy, University Hospital Hamburg, Germany
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Gehling UM, Ergün S, Schumacher U, Wagener C, Pantel K, Otte M, Schuch G, Schafhausen P, Mende T, Kilic N, Kluge K, Schäfer B, Hossfeld DK, Fiedler W. In vitro differentiation of endothelial cells from AC133-positive progenitor cells. Blood 2000; 95:3106-12. [PMID: 10807776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Recent findings support the hypothesis that the CD34(+)-cell population in bone marrow and peripheral blood contains hematopoietic and endothelial progenitor and stem cells. In this study, we report that human AC133(+) cells from granulocyte colony-stimulating factor-mobilized peripheral blood have the capacity to differentiate into endothelial cells (ECs). When cultured in the presence of vascular endothelial growth factor (VEGF) and the novel cytokine stem cell growth factor (SCGF), AC133(+) progenitors generate both adherent and proliferating nonadherent cells. Phenotypic analysis of the cells within the adherent population reveals that the majority display endothelial features, including the expression of KDR, Tie-2, Ulex europaeus agglutinin-1, and von Willebrand factor. Electron microscopic studies of these cells show structures compatible with Weibel-Palade bodies that are found exclusively in vascular endothelium. AC133-derived nonadherent cells give rise to both hematopoietic and endothelial colonies in semisolid medium. On transfer to fresh liquid culture with VEGF and SCGF, nonadherent cells again produce an adherent and a nonadherent population. In mice with severe combined immunodeficiency, AC133-derived cells form new blood vessels in vivo when injected subcutaneously together with A549 lung cancer cells. These data indicate that the AC133(+)-cell population consists of progenitor and stem cells not only with hematopoietic potential but also with the capacity to differentiate into ECs. Whether these hematopoietic and endothelial progenitors develop from a common precursor, the hemangioblast will be studied at the single-cell level.
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Affiliation(s)
- U M Gehling
- Department of Hematology/Oncology, University Hospital Eppendorf, Hamburg, Germany.
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Abstract
To examine the influence of chronic mechanical stretch on functional behavior of cardiac myocytes, we reconstituted embryonic chick or neonatal rat cardiac myocytes to a 3-dimensional engineered heart tissue (EHT) by mixing freshly isolated cells with neutralized collagen I and culturing them between two Velcro-coated silicone tubes, held at a fixed distance with a metal spacer. After 4 days, EHTs were subjected to a phasic unidirectional stretch for 6 days in serum-containing medium. Compared to unstretched controls, RNA/DNA and protein/cell ratios increased by 100% and 50%, respectively. ANF mRNA and alpha-sarcomeric actin increased by 98% and 40%, respectively. Morphologically, stretched EHTs exhibited improved organization of cardiac myocytes into parallel arrays of rod-shaped cells, increased cell length and width, longer myofilaments, and increased mitochondrial density. Thus, stretch induced phenotypic changes, generally referred to as hypertrophy. Concomitantly, force of contraction was two- to fourfold higher both under basal conditions and after stimulation with calcium or the beta-adrenergic agonist isoprenaline. Contraction kinetics were accelerated with a 14-44% decrease in twitch duration under all those conditions. In summary, we have developed a new in vitro model that allows morphological, molecular, and functional consequences of stretch to be studied under defined conditions. The main finding was that stretch of EHTs induced cardiac myocyte hypertrophy, which was accompanied by marked improvement of contractile function.
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Affiliation(s)
- C Fink
- Institute of Experimental and Clinical Pharmacology and Toxicology, University-Hospital Eppendorf, Hamburg, Germany
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35
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Lamszus K, Lengler U, Schmidt NO, Stavrou D, Ergün S, Westphal M. Vascular endothelial growth factor, hepatocyte growth factor/scatter factor, basic fibroblast growth factor, and placenta growth factor in human meningiomas and their relation to angiogenesis and malignancy. Neurosurgery 2000; 46:938-47; discussion 947-8. [PMID: 10764269 DOI: 10.1097/00006123-200004000-00033] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE Angiogenesis is mediated by a number of different growth factors and appears vital for tumor growth. The understanding of angiogenic mechanisms could offer new therapeutic perspectives; in this context, the role of four potentially angiogenic growth factors was analyzed in a large series of meningiomas of different grades. METHODS Vascular endothelial growth factor (VEGF), placenta growth factor, hepatocyte growth factor/scatter factor, and basic fibroblast growth factor were quantified in 69 tumors by enzyme-linked immunosorbent assay. Microvessel density and proliferative activity were determined on paraffin sections, and clinical tumor invasiveness was rated. Induction of endothelial chemotaxis and capillary-like tube formation were studied in vitro using modified Boyden chamber assays and three-dimensional collagen gel assays, respectively. RESULTS Tumors included 40 benign (World Health Organization [WHO] Grade I), 21 atypical (WHO Grade II), and 8 anaplastic/malignant (WHO Grade III) meningiomas. We found a correlation between meningioma grade and VEGF content (r = 0.37, P = 0.002), which was 2-fold higher in atypical than in benign meningiomas (P = 0.022) and 10-fold higher in malignant than in benign meningiomas (P = 0.025). Among different subtypes of Grade I meningiomas, VEGF levels were 10-fold higher in meningothelial than in fibrous meningiomas (P = 0.015). None of the other three factors investigated showed any association with tumor grade, microvessel density, or invasiveness, and VEGF also did not correlate with vascularity or invasiveness. Moreover, vascularity did not increase with malignancy grade. Endothelial chemotaxis and capillary-like tube formation in vitro were induced by meningioma extracts and were most effectively blocked by co-addition of antibodies against basic fibroblast growth factor, followed by anti-VEGF, whereas anti-hepatocyte growth factor/scatter factor was not effective. The chemotactic activity of meningioma extracts on endothelial cells correlated with their VEGF content (r = 0.6, P = 0.003). CONCLUSION Meningiomas do not show an angiogenic switch involving VEGF and/or hepatocyte growth factor/scatter factor, as has previously been found in gliomas. Nevertheless, the biological activity of VEGF and basic fibroblast growth factor in meningiomas suggests that both are potential targets for antiangiogenic therapy in meningiomas of all WHO grades.
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Affiliation(s)
- K Lamszus
- Department of Neuropathology, University Hospital Eppendorf, Hamburg, Germany
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Ergün S, Kilik N, Ziegeler G, Hansen A, Nollau P, Götze J, Wurmbach JH, Horst A, Weil J, Fernando M, Wagener C. CEA-related cell adhesion molecule 1: a potent angiogenic factor and a major effector of vascular endothelial growth factor. Mol Cell 2000; 5:311-20. [PMID: 10882072 DOI: 10.1016/s1097-2765(00)80426-8] [Citation(s) in RCA: 181] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
CEA-related cell adhesion molecule 1 (CEACAM1) exhibits angiogenic properties in in vitro and in vivo angiogenesis assays. CEACAM1 purified from granulocytes and endothelial cell media as well as recombinant CEACAM1 expressed in HEK293 cells stimulate proliferation, chemotaxis, and capillary-like tube formation of human microvascular endothelial cells. They increase vascularization of chick chorioallantoic membrane and potentiate the effects of vascular endothelial growth factor (VEGF)165. VEGF165 increases CEACAM1 expression both on the mRNA and the protein level. VEGF165-induced endothelial tube formation is blocked by a monoclonal CEACAM1 antibody. These data suggest that CEACAM1 is a major effector of VEGF in the early microvessel formation. Since CEACAM1 is expressed in tumor microvessels but not in large blood vessels, CEACAM1 may be a target for the inhibition of tumor angiogenesis.
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Affiliation(s)
- S Ergün
- Department of Anatomy, University Hospital Eppendorf, Hamburg, Germany.
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37
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Fiedler W, Henke RP, Ergün S, Schumacher U, Gehling UM, Vohwinkel G, Kilic N, Hossfeld DK. Derivation of a new hematopoietic cell line with endothelial features from a patient with transformed myeloproliferative syndrome: a case report. Cancer 2000; 88:344-51. [PMID: 10640966 DOI: 10.1002/(sici)1097-0142(20000115)88:2<344::aid-cncr14>3.0.co;2-6] [Citation(s) in RCA: 33] [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: 11/09/2022]
Abstract
BACKGROUND During embryonal development primitive hematopoiesis can be observed first in the yolk sac, in which both hematopoietic and endothelial cells are derived from a common precursor, the hemangioblast. Whether cells with this dual differentiation potential persist during postnatal life is unknown. METHODS A cell line was derived from a patient with secondary acute leukemia. Because of its ability to grow in soft agar and in SCID mice, this cell line was analyzed for expression of differentiation antigens by fluorescence-activated cell sorter analysis, immunocytochemistry, fluorescent in situ hybridization (FISH) analysis with simultaneous cell surface staining, and polymerase chain reaction (PCR). RESULTS A new cell line was established from a patient with essential thrombocytosis that transformed into acute leukemia. The patient's initial clinical presentation included skin and lymph node infiltrations that were taken for an angiosarcoma due to positivity for CD34, CD31, and von Willebrand factor on immunohistology. In addition to hematopoietic markers, leukemic cells expressed endothelial antigens such as CD62E, CD105, and bound Ulex europäeus lectin-1. Immunocytochemistry revealed positive staining for vascular endothelial growth factor receptor type 2 (KDR), Tie-2/Tek, the angiopoietin receptor, and vascular endothelial cadherin. These results were confirmed by PCR analysis. Simultaneous staining for CD62E and FISH analysis showed that cells with endothelial characteristics belonged to the leukemia. FISH analysis of histologic sections of the lymph node infiltration confirmed this manifestation as part of the leukemic process. The derived cell line, UKE-1, forms colonies in soft agar and is tumorigenic in SCID mice. CONCLUSIONS This new cell line, UKE-1, appears to combine hematopoietic and endothelial features, indicating the close ontogenic relation of both lineages.
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Affiliation(s)
- W Fiedler
- Department of Oncology/Hematology, University Hospital Eppendorf, Hamburg, Germany
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Graeven U, Fiedler W, Karpinski S, Ergün S, Kilic N, Rodeck U, Schmiegel W, Hossfeld DK. Melanoma-associated expression of vascular endothelial growth factor and its receptors FLT-1 and KDR. J Cancer Res Clin Oncol 1999; 125:621-9. [PMID: 10541969 DOI: 10.1007/s004320050325] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The expression patterns of vascular endothelial growth factor (VEGF) and its two receptors, flt-1 and KDR, were assessed in normal human melanocytes, transformed melanocytes expressing the simian virus 40 Tgene (SV40T), and melanoma cells derived from primary and metastatic lesions. Constitutive expression of VEGF, flt-1, and KDR mRNA and proteins was observed in the majority of primary and metastatic melanoma cell lines, and in SV40T-transformed melanocytes. VEGF expression in melanoma cell lines was further enhanced by exogenous growth factors including insulin and fetal calf serum. By contrast, neonatal melanocytes did not express VEGF or VEGF receptors and VEGF expression could not be induced by exogenous growth factors. Exogenous VEGF had no significant effects on melanoma cell proliferation or on production of a transcriptional target for VEGF, urokinase-type plasminogen activator. Down-regulation of VEGF expression in the metastatic melanoma cell line WM164 through transfection of a VEGF antisense construct similarly did not affect proliferation of the transfected cells in the presence or absence of exogenous VEGF. In summary, coexpression of VEGF and its receptors is a tumor-associated phenomenon in melanoma development. However VEGF production does not support autocrine proliferation of the melanoma cell lines tested.
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Affiliation(s)
- U Graeven
- Department of Medicine, University Hospital Knappschafts Krankenhaus, Ruhr University Bochum, In der Schornau 23-25, D-44892 Bochum, Germany.
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Abstract
Apoptosis in normal meatal skin, cholesteatoma and squamous cell carcinoma (SCC) of the ear was investigated by using morphological analysis and in-situ specific labelling of fragmented DNA. In meatal skin, apoptotic cells were localized mainly in the granular layers, but were not so restricted in cholesteatoma, while in SCC they were even more dispersed. The apoptotic index (AI) was low (1.59 +/- 0.10 SEM) in normal skin. It was increased in cholesteatoma (2.09 +/- 0.11), and was intermediate in SCC (1.72 +/- 0.14). By contrast, the mitotic index (MI) increased from 0.19 +/- 0.02 in normal skin, to 0.25 +/- 0.01 in cholesteatoma and to 0.25 +/- 0.02 in SCC. Our findings indicate that apoptosis is involved in the epithelial homeostasis of meatal skin, cholesteatoma and SCC of the ear. The hyperproliferation of epithelial cells in cholesteatoma is counteracted by an increased apoptosis rate, while in SCC the increased cell proliferation without a compensatory increase in apoptosis may be associated with the malignant transformation.
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Affiliation(s)
- S Ergün
- Department of Otolaryngology, Huddinge University Hospital, Sweden
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40
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Ergün S, Harneit S, Paust HJ, Mukhopadhyay AK, Holstein AF. Endothelin and endothelin receptors A and B in the human testis. Anat Embryol (Berl) 1999; 199:207-14. [PMID: 10068086 DOI: 10.1007/s004290050221] [Citation(s) in RCA: 17] [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] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Human testicular capillaries interconnect Leydig cells and seminiferous tubules. Microcirculation and blood flow are therefore essential for the maintenance of spermatogenesis. The expression and the localisation of ET (endothelin) and its receptors in testicular tissue, in seminiferous tubules and in human testicular capillaries were studied. ET-1 mRNA was detected in whole testicular tissue and in seminiferous tubules whereas isolated testicular capillaries were negative. Big ET-1 (Big endothelin 1) and ET peptides were localised in Leydig and Sertoli cells whereas interstitial and intramural capillaries (within the lamina propria) remained unstained. ET was also found in mature spermatids. ET-A (endothelin receptor A) mRNA was detected in seminiferous tubules and whole testicular tissue whereas testicular blood vessels were negative. ET-A immunostaining was displayed in Leydig and Sertoli cells and in spermatids. ET-B (endothelin receptor B) mRNA was detected in whole testicular tissue, seminiferous tubules and in testicular capillaries. ET-B peptide was prominent in Leydig cells, peritubular cells, endothelial cells and pericytes of interstitial and intramural capillaries as well as in vascular endothelial and smooth muscle cells. From these results we conclude that ET produced in Leydig and Sertoli cells can act in a paracrine manner via ET-B on the human testicular microvasculature and the peritubular cells. The presence of both ET-A and ET-B in Leydig cells and of ET-A in Sertoli cells leads to the assumption that ET could influence these cells as an autocrine factor.
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Affiliation(s)
- S Ergün
- Anatomisches Institut, UKE, Hamburg, Germany.
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Schmidt NO, Westphal M, Hagel C, Ergün S, Stavrou D, Rosen EM, Lamszus K. Levels of vascular endothelial growth factor, hepatocyte growth factor/scatter factor and basic fibroblast growth factor in human gliomas and their relation to angiogenesis. Int J Cancer 1999; 84:10-8. [PMID: 9988225 DOI: 10.1002/(sici)1097-0215(19990219)84:1<10::aid-ijc3>3.0.co;2-l] [Citation(s) in RCA: 221] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Angiogenesis is a possible target in the treatment of human gliomas. To evaluate the role of 3 growth factors, vascular endothelial growth factor (VEGF), hepatocyte growth factor/scatter factor (HGF/SF) and basic fibroblast growth factor (bFGF), in the angiogenic cascade, we determined their levels in extracts of 71 gliomas by enzyme-linked immunosorbent assay (ELISA). The levels of bFGF were only marginally different between gliomas of World Health Organization (WHO) grade II (low grade) and grades III and IV (high grade). In contrast, the mean concentrations of VEGF were 11-fold higher in high-grade tumors and those of HGF/SF 7-fold, respectively. Both were highly significantly correlated with microvessel density (p < 0.001) as determined by immunostaining for factor VIII-related antigen. In addition, VEGF and HGF/SF appeared to be independent predictive parameters for glioma microvessel density as determined by multiple regression analysis. We measured the capacity of all 3 factors to induce endothelial tube formation in a collagen gel. In this assay, bFGF was found to be an essential cofactor with which VEGF as well as HGF/SF were able to synergize independently. According to the concentrations of angiogenic factors, extracts from high-grade tumors were significantly more potent in the tube formation assay than the low-grade extracts (p = 0.02). Adding neutralizing antibodies to bFGF, VEGF and HGF/SF together with the extracts, tube formation was inhibited by up to 98%, 62% and 54%, respectively. Our findings suggest that bFGF is an essential cofactor for angiogenesis in gliomas, but in itself is insufficient as it is present already in the sparsely vascularized low-grade tumors. Upon induction of angiogenesis in high-grade tumors, bFGF may synergize with rising levels of not only VEGF but possibly also with HGF/SF, which appears here to be an independent angiogenic factor.
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Affiliation(s)
- N O Schmidt
- Department of Neurosurgery, University Hospital Eppendorf, Hamburg, Germany
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Abstract
Neovascularization in the adult central nervous system occurs as a response to several pathophysiological conditions such as ischemia, wound repair, or neoplasia. Endothelial cells from different blood vessel types, different organs, and different species are heterogeneous; therefore, the appropriate cell type should be used to study specific aspects of vascular pathology. We have developed a method to isolate human cerebral microvascular endothelial cells (CMECs) from small, freshly obtained specimens of normal brain adherent to human arteriovenous malformations (AVMs). The isolation procedure involves enzymatic digestions and gradient centrifugations, yielding over 95% pure primary cultures. Alternative isolation methods using magnetic beads, panning, or cloning were not superior with regard to cell purity or yield. CMECs were identified by their immunoreactivity for vWF, CD34, EN4, binding of Ulex europeus lectin, and uptake of DiI-Ac-LDL. They displayed ultrastructural features characteristic of blood-brain barrier endothelial cells and expressed GLUT-1. CMECs were subcultured; however, prolonged culture led to reduced culture purity. Vascular endothelial growth factor, basic fibroblast growth factor and hepatocyte growth factor/scatter factor stimulated the directional motility of CMECs, with dose-response profiles similar to human umbilical vein endothelial cells (HUVECs). In contrast, to stimulate proliferation, lower concentrations of growth factors tended to be necessary for CMECs than for the large vessel endothelial cells. CMECs formed capillary tube-like structures in an in vitro angiogenesis assay using matrigel. This study expands the spectrum of available tissue sources for the isolation of human neuromicrovascular endothelial cells, which are essential for the in vitro study of blood-brain barrier function and cerebral angiogenesis.
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Affiliation(s)
- K Lamszus
- Department of Neuropathology, University Hospital Eppendorf, Hamburg, Germany
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Akkus I, Ergün S, Yöntem M, Ay M, Çaǧlayan O, Bor M, Gökçe R. Effects of various oils on lipid peroxidation in the liver. Pathophysiology 1998. [DOI: 10.1016/s0928-4680(98)80534-8] [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: 11/16/2022] Open
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Abstract
Hypothalamic corticotropin-releasing hormone (CRH) is the principal regulator of the hypothalamus-pituitary-adrenal axis in mammals. In addition, immunoreactive CRH is also present at peripheral sites, where it is thought to act as a proinflammatory peptide. However, the source of peripheral CRH has remained obscure. Human lymphocytes were shown to produce immunoreactive CRH, yet the data on CRH mRNA expression in these cells are equivocal. More recently, Vaughan et al. discovered a new member of the CRH family, termed urocortin. Urocortin was shown to act through the same receptors as CRH. The current study was designed to investigate both mRNA and protein expression of CRH and urocortin in human lymphocytes. Using a commercial CRH(1-41) radioimmunoassay, we demonstrate that normal human lymphocytes and Jurkat T lymphoma cells produce significant amounts of immunoreactive peptide. However, no CRH mRNA was detectable by RT-PCR in these cells. In contrast, a band of the correct size and sequence was amplified with urocortin-specific primers. Immunocytochemical analysis of human lymphocytes using antibodies that could distinguish between CRH and urocortin revealed significant expression of urocortin but not of CRH, consistent with our RT-PCR data. We conclude that human lymphocytes produce urocortin, but not CRH.
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Affiliation(s)
- C M Bamberger
- IHF, Institute for Hormone and Fertility Research, University of Hamburg, University Clinic Eppendorf, Dept. of Medicine, Germany
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46
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Ergün S, Luttmer W, Fiedler W, Holstein AF. Functional expression and localization of vascular endothelial growth factor and its receptors in the human epididymis. Biol Reprod 1998; 58:160-8. [PMID: 9472937 DOI: 10.1095/biolreprod58.1.160] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Blood supply is essential for the maintenance of epididymal function. Since there is no considerable neovascularization in the epididymis, this tissue could represent a suitable model to study the vascular endothelial growth factor (VEGF) effect for vascular permeability. We studied the expression and function of VEGF and its receptors fms-like tyrosine kinase (Flt-1) and fetal liver kinase (designated as kinase insert domain-containing receptor, KDR in the human) in the human epididymis. VEGF and VEGF receptors mRNA were detected in the human epididymal tissue. VEGF protein was localized in peritubular and in ciliated cells of efferent ducts as well as in peritubular and basal cells of the epididymal duct. Vascular endothelial cells did not express VEGF. Flt-1 protein was localized in ciliated cells of efferent ducts and in lymphatic vessels. Vascular endothelial cells were negative for Flt-1 but positive for KDR. In vitro VEGF165 treatment of epididymal tissue induced endothelial fenestrations and opening of interendothelial junctions. Additionally, we observed for the first time that VEGF could induce transendothelial gaps. We conclude that these gaps might be of importance not only for molecular transport but also for cell passage across the vessel wall, which may be significant for tumor metastasis. VEGF may act as a paracrine effector to influence the permeability of lymphatic vessels via Flt-1, and of blood vessels via KDR.
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MESH Headings
- Aged
- Aged, 80 and over
- Antigens, CD/analysis
- Antigens, Differentiation, Myelomonocytic/analysis
- Capillaries/chemistry
- Capillaries/ultrastructure
- Endothelial Growth Factors/analysis
- Endothelial Growth Factors/genetics
- Endothelial Growth Factors/pharmacology
- Endothelium, Vascular/chemistry
- Endothelium, Vascular/ultrastructure
- Epididymis/blood supply
- Epididymis/chemistry
- Gene Expression
- Humans
- Immunohistochemistry
- Lymphokines/analysis
- Lymphokines/genetics
- Lymphokines/pharmacology
- Male
- RNA, Messenger/analysis
- Receptor Protein-Tyrosine Kinases/analysis
- Receptor Protein-Tyrosine Kinases/genetics
- Receptors, Growth Factor/analysis
- Receptors, Growth Factor/genetics
- Receptors, Vascular Endothelial Growth Factor
- Vascular Endothelial Growth Factor A
- Vascular Endothelial Growth Factors
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Affiliation(s)
- S Ergün
- Institute of Anatomy, Hamburg, Germany.
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47
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Bruns T, Ergün S, Tauber R. Morphological and functional aspects of the human spermatic cord veins. Adv Exp Med Biol 1997; 424:185-6. [PMID: 9361791 DOI: 10.1007/978-1-4615-5913-9_35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- T Bruns
- Department of Urology, Barmbek General Hospital, Hamburg, Germany
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48
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Ergün S, Empen W, Fiedler W. VEGF modulates the capillaries of the human epididymis. Adv Exp Med Biol 1997; 424:189-90. [PMID: 9361793 DOI: 10.1007/978-1-4615-5913-9_37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- S Ergün
- Institute of Anatomy, University of Hamburg (UKE), Germany
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Walther N, Jansen M, Ergün S, Kascheike B, Tillmann G, Ivell R. Sertoli cell-specific gene expression in conditionally immortalized cell lines. Adv Exp Med Biol 1997; 424:139-42. [PMID: 9361778 DOI: 10.1007/978-1-4615-5913-9_22] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- N Walther
- Institute for Hormone and Fertility Research, University of Hamburg, Germany
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Haider SG, Servos G, Tajtaraghi S, Berthold G, Mukhopadhyay AK, Kilic N, Ergün S. Functional markers for fetal and postnatal differentiation of rat Leydig cells. Adv Exp Med Biol 1997; 424:143-4. [PMID: 9361779 DOI: 10.1007/978-1-4615-5913-9_23] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- S G Haider
- Institute of Anatomy II, Heinrich Heine University, Düsseldorf, Germany
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