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Tavakoli S, Onder O. Four-dimensional Cardiac CT Depicts Coexistent Amyloidosis in Older Adults with Severe Aortic Stenosis. Radiology 2023; 309:e233091. [PMID: 38085085 PMCID: PMC10746845 DOI: 10.1148/radiol.233091] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 11/18/2023] [Accepted: 11/20/2023] [Indexed: 12/18/2023]
Affiliation(s)
- Sina Tavakoli
- From the Departments of Radiology (S.T., O.O.) and Medicine (S.T.), University of Pittsburgh, Pittsburgh, Pa; Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa (S.T.); and Department of Radiology, UPMC Presbyterian Hospital, 200 Lothrop St, Suite E200, Pittsburgh, PA 15213 (S.T.)
| | - Omer Onder
- From the Departments of Radiology (S.T., O.O.) and Medicine (S.T.), University of Pittsburgh, Pittsburgh, Pa; Heart, Lung, Blood, and Vascular Medicine Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa (S.T.); and Department of Radiology, UPMC Presbyterian Hospital, 200 Lothrop St, Suite E200, Pittsburgh, PA 15213 (S.T.)
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2
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Onder O, Dilek I, Erdogan C, Toker Onder I, Arik E, Atasoy G, Yazkan Erdogan K, Ali Algan C. Multimodality imaging findings of infected endometriomas: "T1 signal reversal" as a potential diagnostic sign? Radiol Case Rep 2023; 18:2452-2460. [PMID: 37235080 PMCID: PMC10206383 DOI: 10.1016/j.radcr.2023.04.019] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 04/10/2023] [Indexed: 05/28/2023] Open
Abstract
Endometrioma superinfection is a rare clinical entity that may cause diagnostic confusion and can be complicated by rupture, peritonitis, sepsis, and even death. Therefore, early diagnosis is crucial for appropriate patient management. Since clinical findings can be mild or nonspecific, radiological imaging is frequently used for diagnostic purposes. From a radiological perspective, it can be challenging to distinguish the presence of infection in an endometrioma. Complex cyst structure, wall thickening, increased peripheral vascularization, nondependent air bubbles, and surrounding inflammatory changes have been reported as potential US and CT findings suggestive of superinfection. On the other hand, there is a gap in the literature regarding MRI findings. To the best of our knowledge, this is the first case report in the literature to discuss MRI findings and temporal evolution of infected endometriomas. In this case report, we aim to present a patient with bilateral infected endometriomas at different stages, and to discuss the multimodality imaging findings, focusing specifically on the MRI. We defined 2 new MRI findings that may indicate the presence of superinfection in the early period. The first one was the "T1 signal reversal" seen in bilateral endometriomas. The second one, "progressive disappearance of T2 shading," was observed only in the right-sided lesion. These nonenhancing signal changes accompanied by increased lesion sizes during MRI follow-up were thought to represent a transition from blood to pus, and the percutaneous drainage of the right-sided endometrioma microbiologically confirmed our suspicion. In conclusion, MRI can be helpful in the early diagnosis of infected endometrioma due to its high soft tissue resolution. Percutaneous treatment may contribute to patient management as an alternative to surgical drainage.
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Affiliation(s)
- Omer Onder
- Department of Radiology, Igdir Dr. Nevruz Erez State Hospital, Melekli Yolu Street, Igdir 76000, Turkey
| | - Ismail Dilek
- Department of Radiology, Igdir Dr. Nevruz Erez State Hospital, Melekli Yolu Street, Igdir 76000, Turkey
| | - Cem Erdogan
- Department of Obstetrics and Gynecology, Igdir Dr. Nevruz Erez State Hospital, Igdir, Turkey
| | - Ilke Toker Onder
- Medical Microbiology Department, Igdir Dr. Nevruz Erez State Hospital, Igdir, Turkey
| | - Erbil Arik
- Department of Radiology, Igdir Dr. Nevruz Erez State Hospital, Melekli Yolu Street, Igdir 76000, Turkey
| | - Gorkem Atasoy
- Department of Radiology, Igdir Dr. Nevruz Erez State Hospital, Melekli Yolu Street, Igdir 76000, Turkey
| | - Kubra Yazkan Erdogan
- Department of Obstetrics and Gynecology, Igdir Dr. Nevruz Erez State Hospital, Igdir, Turkey
| | - Cavide Ali Algan
- Department of Obstetrics and Gynecology, Igdir Dr. Nevruz Erez State Hospital, Igdir, Turkey
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Karaosmanoglu AD, Onder O, Kizilgoz V, Hahn PF, Kantarci M, Ozmen MN, Karcaaltincaba M, Akata D. Infarcts and ischemia in the abdomen: an imaging perspective with an emphasis on cross-sectional imaging findings. Abdom Radiol (NY) 2023; 48:2167-2195. [PMID: 36933024 PMCID: PMC10024022 DOI: 10.1007/s00261-023-03877-2] [Citation(s) in RCA: 1] [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: 01/13/2023] [Revised: 02/23/2023] [Accepted: 02/24/2023] [Indexed: 03/19/2023]
Abstract
Infarcts and ischemia of abdominal organs may present with acute abdominal pain, and early diagnosis is crucial to prevent morbidity and mortality. Unfortunately, some of these patients present in poor clinical conditions to the emergency department, and imaging specialists are crucial for optimal outcomes. Although the radiological diagnosis of abdominal infarcts is often straightforward, it is vital to use the appropriate imaging modalities and correct imaging techniques for their detection. Additionally, some non-infarct-related abdominal pathologies may mimic infarcts, cause diagnostic confusion, and result in delayed diagnosis or misdiagnosis. In this article, we aimed to outline the general imaging approach, present cross-sectional imaging findings of infarcts and ischemia in several abdominal organs, including but not limited to, liver, spleen, kidneys, adrenals, omentum, and intestinal segments with relevant vascular anatomy, discuss possible differential diagnoses and emphasize important clinical/radiological clues that may assist radiologists in the diagnostic process.
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Affiliation(s)
| | - Omer Onder
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | - Volkan Kizilgoz
- Department of Radiology, Erzincan Binali Yıldırım University School of Medicine, 24100, Erzincan, Turkey
| | - Peter F Hahn
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA
| | - Mecit Kantarci
- Department of Radiology, Erzincan Binali Yıldırım University School of Medicine, 24100, Erzincan, Turkey
- Department of Radiology, Atatürk University School of Medicine, 25240, Erzurum, Turkey
| | - Mustafa Nasuh Ozmen
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | | | - Deniz Akata
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
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4
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Karaosmanoglu AD, Uysal A, Onder O, Hahn PF, Akata D, Ozmen MN, Karcaaltıncaba M. Cross-sectional imaging findings of splenic infections: is differential diagnosis possible? Abdom Radiol (NY) 2021; 46:4828-4852. [PMID: 34047800 PMCID: PMC8160561 DOI: 10.1007/s00261-021-03130-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 05/12/2021] [Accepted: 05/19/2021] [Indexed: 01/31/2023]
Abstract
The spleen plays an important role in the immunological homeostasis of the body. Several neoplastic and non-neoplastic diseases may affect this organ, and imaging is of fundamental importance for diagnosis. Infectious diseases of the spleen can be encountered in daily radiology practice, and differential diagnosis may sometimes be challenging. Infectious involvement of the spleen can be primary or secondary to a different source outside the spleen. Despite the fact that different infectious diseases may cause similar imaging findings, we believe that differential diagnosis between different causes may also be possible in certain patients with imaging. Early diagnosis may potentially enhance patients’ treatment and outcome. In this review, we aimed to increase imaging specialists’ awareness of splenic infections by describing the multimodality imaging features of common and atypical infections of the spleen with their differential diagnoses.
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Affiliation(s)
| | - Aycan Uysal
- Department of Radiology, Gulhane Training and Research Hospital, Ankara, 06010, Turkey
| | - Omer Onder
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Peter F Hahn
- Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA
| | - Deniz Akata
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Mustafa Nasuh Ozmen
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
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5
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Karaosmanoglu AD, Onder O, Leblebici CB, Sokmensuer C, Akata D, Ozmen MN, Karcaaltincaba M. Cross-sectional imaging features of unusual adrenal lesions: a radiopathological correlation. Abdom Radiol (NY) 2021; 46:3974-3994. [PMID: 33738556 DOI: 10.1007/s00261-021-03041-8] [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: 01/17/2021] [Revised: 02/28/2021] [Accepted: 03/05/2021] [Indexed: 12/11/2022]
Abstract
The detection rates of adrenal masses are increasing with the common and widespread use of cross-sectional imaging. Adrenal adenomas, myelolipomas, metastases, pheochromocytomas, and adrenocortical tumors are well-known and relatively common adrenal tumors. However, there are many less-known neoplastic and nonneoplastic adrenal diseases that might affect the adrenal glands in addition to these common lesions. These rare entities include, but are not limited to, hydatid cysts, congenital adrenal hyperplasia, Wolman disease, adrenal tuberculosis, primary adrenal lymphoma. This article aims to present imaging findings of these unusual lesions in accordance with their pathologic characteristics. We think that the simultaneous presentation of the pathological findings with the imaging features may facilitate the learning process and may potentially enhance the recognition of these entities.
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Affiliation(s)
| | - Omer Onder
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Can Berk Leblebici
- Department of Pathology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Cenk Sokmensuer
- Department of Pathology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Deniz Akata
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Mustafa Nasuh Ozmen
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
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6
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Karaosmanoglu AD, Onder O, Leblebici CB, Sokmensuer C, Akata D, Ozmen MN, Karcaaltincaba M. Immunoglobulin G4-related systemic disease: mesenteric and peritoneal involvement with radiopathological correlation and differential diagnoses. Abdom Radiol (NY) 2021; 46:1977-1991. [PMID: 33742218 DOI: 10.1007/s00261-021-03037-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/28/2021] [Accepted: 03/03/2021] [Indexed: 11/25/2022]
Abstract
Since its first introduction in 2003 by Kamisawa et al., IgG4-related disease has gained wide interest in the imaging community, and several manuscripts have been published regarding its imaging features. In addition to initial observations in the pancreaticobiliary system, it is now well known that the disease may involve every organ system in the body. There is not much information in the imaging literature about the involvement of mesentery, omentum, and peritoneum in this disease. This article aims to provide more information about the imaging findings of IgG4-related disease regarding these areas by making radiopathological correlations and discussing the possible differential diagnoses.
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Affiliation(s)
| | - Omer Onder
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | - Can Berk Leblebici
- Department of Pathology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | - Cenk Sokmensuer
- Department of Pathology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | - Deniz Akata
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | - Mustafa Nasuh Ozmen
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
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7
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Onder O, Yarasir Y, Azizova A, Durhan G, Onur MR, Ariyurek OM. Errors, discrepancies and underlying bias in radiology with case examples: a pictorial review. Insights Imaging 2021; 12:51. [PMID: 33877458 PMCID: PMC8056102 DOI: 10.1186/s13244-021-00986-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 03/19/2021] [Indexed: 01/12/2023] Open
Abstract
Interpretation differences between radiologists and diagnostic errors are significant issues in daily radiology practice. An awareness of errors and their underlying causes can potentially increase the diagnostic performance and reduce individual harm. The aim of this paper is to review both the classification of errors and the underlying biases. Case-based examples are presented and discussed for each type of error and bias to provide greater clarity and understanding.
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Affiliation(s)
- Omer Onder
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Yasin Yarasir
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Aynur Azizova
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Gamze Durhan
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Mehmet Ruhi Onur
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey
| | - Orhan Macit Ariyurek
- Department of Radiology, Hacettepe University School of Medicine, Ankara, 06100, Turkey.
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Azizova A, Onder O, Arslan S, Ardali S, Hazirolan T. Correction to: Persistent left superior vena cava: clinical importance and differential diagnoses. Insights Imaging 2021; 12:49. [PMID: 33864141 PMCID: PMC8052389 DOI: 10.1186/s13244-021-00983-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Aynur Azizova
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | - Omer Onder
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | - Sevtap Arslan
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | - Selin Ardali
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey
| | - Tuncay Hazirolan
- Department of Radiology, Hacettepe University School of Medicine, 06100, Ankara, Turkey.
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Azizova A, Onder O, Arslan S, Ardali S, Hazirolan T. Persistent left superior vena cava: clinical importance and differential diagnoses. Insights Imaging 2020; 11:110. [PMID: 33057803 PMCID: PMC7561662 DOI: 10.1186/s13244-020-00906-2] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 08/20/2020] [Indexed: 01/07/2023] Open
Abstract
Persistent left superior vena cava (PLSVC) is the most common thoracic venous anomaly and may be a component of the complex cardiac pathologies. While it is often asymptomatic, it can lead to significant problems such as arrhythmias and cyanosis. Besides, it can cause serious complications during vascular interventional procedures or the surgical treatment of cardiac anomalies (CA). The clinical significance of PLSVC depends on the drainage site and the accompanying CA. In this article, we will describe the epidemiology, embryology, and anatomic variations of PLSVC. Possible accompanying CA and heterotaxy spectrum will be reviewed with the help of multidetector computed tomography (MDCT) images. Radiological pitfalls, differential diagnoses, and the clinical importance of PLSVC will be highlighted.
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Affiliation(s)
- Aynur Azizova
- grid.14442.370000 0001 2342 7339Department of Radiology, Hacettepe University School of Medicine, 06100 Ankara, Turkey
| | - Omer Onder
- grid.14442.370000 0001 2342 7339Department of Radiology, Hacettepe University School of Medicine, 06100 Ankara, Turkey
| | - Sevtap Arslan
- grid.14442.370000 0001 2342 7339Department of Radiology, Hacettepe University School of Medicine, 06100 Ankara, Turkey
| | - Selin Ardali
- grid.14442.370000 0001 2342 7339Department of Radiology, Hacettepe University School of Medicine, 06100 Ankara, Turkey
| | - Tuncay Hazirolan
- grid.14442.370000 0001 2342 7339Department of Radiology, Hacettepe University School of Medicine, 06100 Ankara, Turkey
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Zou C, Du Y, Rashid A, Ram H, Savasli E, Pieterse PJ, Ortiz-Monasterio I, Yazici A, Kaur C, Mahmood K, Singh S, Le Roux MR, Kuang W, Onder O, Kalayci M, Cakmak I. Simultaneous Biofortification of Wheat with Zinc, Iodine, Selenium, and Iron through Foliar Treatment of a Micronutrient Cocktail in Six Countries. J Agric Food Chem 2019; 67:8096-8106. [PMID: 31260296 DOI: 10.1021/acs.jafc.9b01829] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Field experiments were conducted on wheat to study the effects of foliar-applied iodine(I) alone, Zn (zinc) alone, and a micronutrient cocktail solution containing I, Zn, Se (selenium), and Fe (iron) on grain yield and grain concentrations of micronutrients. Plants were grown over 2 years in China, India, Mexico, Pakistan, South Africa, and Turkey. Grain-Zn was increased from 28.6 mg kg-1 to 46.0 mg-1 kg with Zn-spray and 47.1 mg-1 kg with micronutrient cocktail spray. Foliar-applied I and micronutrient cocktail increased grain I from 24 μg kg-1 to 361 μg kg-1 and 249 μg kg-1, respectively. Micronutrient cocktail also increased grain-Se from 90 μg kg-1 to 338 μg kg-1 in all countries. Average increase in grain-Fe by micronutrient cocktail solution was about 12%. The results obtained demonstrated that foliar application of a cocktail micronutrient solution represents an effective strategy to biofortify wheat simultaneously with Zn, I, Se and partly with Fe without yield trade-off in wheat.
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Affiliation(s)
- Chunqin Zou
- Key Laboratory of Plant-Soil Interactions, Ministry of Education, Center for Resources, Environment and Food Security , China Agricultural University , Beijing 100193 , PR China
| | - Yunfei Du
- Key Laboratory of Plant-Soil Interactions, Ministry of Education, Center for Resources, Environment and Food Security , China Agricultural University , Beijing 100193 , PR China
| | - A Rashid
- Pakistan Academy of Sciences , 44000 Islamabad , Pakistan
| | - H Ram
- Punjab Agricultural University , Ludhiana , 141004 Punjab , India
| | - E Savasli
- Transitional Zone Agricultural Research Institute , 26002 Eskisehir , Turkey
| | - P J Pieterse
- Department of Agronomy , Stellenbosch University , Stellenbosch 7600 , South Africa
| | - I Ortiz-Monasterio
- CIMMYT International , AP370, P.O. Box 60326, Houston , Texas 77205 , United States
| | - A Yazici
- Faculty of Engineering and Natural Sciences , Sabanci University , 34956 Istanbul , Turkey
| | - C Kaur
- Punjab Agricultural University Regional Research Station , Gurdaspur , 143521 Punjab , India
| | - K Mahmood
- Soil and Environmental Sciences Division , Nuclear Institute for Agriculture & Biology , 38000 Faisalabad , Pakistan
| | - S Singh
- Punjab Agricultural University Regional Research Station , Bathinda , 151001 Punjab , India
| | - M R Le Roux
- Department of Agronomy , Stellenbosch University , Stellenbosch 7600 , South Africa
| | - W Kuang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography , Chinese Academy of Sciences , Urumqi 830011 , China
| | - O Onder
- Transitional Zone Agricultural Research Institute , 26002 Eskisehir , Turkey
| | - M Kalayci
- Transitional Zone Agricultural Research Institute , 26002 Eskisehir , Turkey
| | - Ismail Cakmak
- Faculty of Engineering and Natural Sciences , Sabanci University , 34956 Istanbul , Turkey
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Cilingiroglu N, Guner P, Toker I, Onder O, Celik Z, Ardic C, Gundem M, Saygili D. Genetically Modified Organisms: Do Agricultural Engineers and Veterinarians Think Different? Eur J Public Health 2017. [DOI: 10.1093/eurpub/ckx186.316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - P Guner
- University Faculty of Medicine, Ankara, Turkey
| | - I Toker
- University Faculty of Medicine, Ankara, Turkey
| | - O Onder
- University Faculty of Medicine, Ankara, Turkey
| | - Z Celik
- University Faculty of Medicine, Ankara, Turkey
| | - C Ardic
- University Faculty of Medicine, Ankara, Turkey
| | - M Gundem
- University Faculty of Medicine, Ankara, Turkey
| | - D Saygili
- University Faculty of Medicine, Ankara, Turkey
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12
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Saygin M, Ozguner MF, Onder O, Doguc DK, Ilhan I, Peker Y. The impact of sleep deprivation on hippocampal-mediated learning and memory in rats. ACTA ACUST UNITED AC 2017; 118:408-416. [PMID: 28766351 DOI: 10.4149/bll_2017_080] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND To examine the impact of different types of sleep deprivation on hippocampal-mediated learning and memory in rats. METHODS Forty-eight Sprague-Dawley male rats were randomly assigned to 1 of 4 equal-size groups: (1) 12 hours of sleep per day (control). (2) total sleep deprivation (TSD), (3) rapid eye movement (REM) deprivation (RD), and (4) sleep restricted to 4 hours per day (SR). All rats were subjected to swimming training in the Morris water maze (MWM). At the end of the experiments, the rats were decapitated, and hippocampus tissue was analyzed for several neurotransmitters and receptors. RESULTS The time spent at the target quadrant increased from 20.2 to 30.0 seconds in the control group on the third day of the experiment, whereas corresponding values increased from 20.2 to 21.8 seconds in the TSD group, 22.1 to 25.4 seconds in the RD group, and 21.2 to 32.0 sec in the SR group (p = 0.026). On the seventh day of the experiment, the values decreased to 25.0 seconds in controls, 22.5 in the RD group, and 23.6 in the SR group (p = 0.045). The TSD group demonstrated significant decreases in glutamate and serotonin levels compared with the control group. There was a significant increase in 5-HT2a receptor expression in all intervention groups compared with the controls. CONCLUSIONS Our results of glutamate levels and 5-HT2a receptor expression in the hippocampus seem to be primarily involved in sleep and memory regulation (Tab. 2, Fig. 4, Ref. 59).
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13
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Gedizlioglu M, Onder O, Kulan C, Ortan P. A survey on comorbidities of migraine in a hospital-based population. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Korn JH, Rickles FR, Ewan VA, Edwards RL, Myers TJ, Onder O. Mononuclear cell modulation of fibroblast procoagulant activity. J Lab Clin Med 1982; 99:657-68. [PMID: 6950992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The release of procoagulant material by connective tissue cells as a sequel to cell injury can initiate blood coagulation and may thus play a role in he pathogenesis of inflammatory lesions. Human foreskin fibroblasts were shown to synthesize high levels of the procoagulant TF in vitro. Generation of TF by fibroblasts was inhibited by addition of supernatants of PHA-stimulated human mononuclear cells to fibroblast cultures. The inhibition was independent of supernatant effects on cellular proliferation and was accompanied by up to a 20-fold increases in PGE2 synthesis in the fibroblast cultures. The inhibition of TF generation by MC-SNs was reversed by adding indomethacin to the fibroblast cultures, suggesting that mononuclear cells suppress fibroblast TF generation by stimulation of endogenous fibroblast synthesis of prostaglandin. Regulation of fibroblast PCA by products of immune cells may be important in the pathogenesis of inflammatory lesions.
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15
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Bobrove AM, Onder O, Myers TJ, Rickles FR, Pastuszak WT, Martin RS, Hild DH. Coexistence of a primary immunodeficiency disorder and Hodgkin's disease: evidence against a B-lymphocyte origin for the Reed-Sternberg cell. Cancer 1981; 48:2624-9. [PMID: 6975648 DOI: 10.1002/1097-0142(19811215)48:12<2624::aid-cncr2820481214>3.0.co;2-h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A 44-year-old woman with a life-long history of recurrent sinopulmonary infections developed Hodgkin's disease with characteristic Reed-Sternberg cells in a biopsy specimen of a mediastinal lymph node. Hypogammaglobulinemia was documented on several serum determinations and plasma cells were absent from biopsy specimens of the lymph node and bone marrow. Immunochemical studies failed to demonstrate any B lymphocytes bearing surface immunoglobulin or Fc-receptors for IgG in the peripheral blood. Pokeweed mitogen stimulation of the patient's peripheral blood lymphocytes in vitro resulted in the development of virtually no plasma cells. Peripheral blood T-lymphocyte number and function were defective initially. Following chemotherapy and radiotherapy, peripheral blood E-rossette-forming cells returned to normal, but T-cell function remained defective and B lymphocytes remained undetectable. These findings are compatible with the presence of two separate immune disorders: a primary hypogammaglobulinemia and Hodgkin's disease. The absence of lymphocytes bearing surface Ig or Fc-receptors for IgG in this patient adds further support against a B-lymphocyte origin for the Reed-Sternberg cell.
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16
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Onder O, Weinstein A, Hoyer LW. Pseudothrombocytopenia caused by platelet agglutinins that are reactive in blood anticoagulated with chelating agents. Blood 1980; 56:177-82. [PMID: 6772260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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Onder O, Lazarchick J, Hoyer LW. Mixed mononuclear cell cultures do not elaborate factor VIII. New Istanbul Contrib Clin Sci 1980; 13:95-9. [PMID: 6784102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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