1
|
Onal G, Yalçın-Çakmaklı G, Özçelik CE, Boussaad I, Şeker UÖŞ, Fernandes HJR, Demir H, Krüger R, Elibol B, Dökmeci S, Salman MM. Variant-specific effects of GBA1 mutations on dopaminergic neuron proteostasis. J Neurochem 2024. [PMID: 38641924 DOI: 10.1111/jnc.16114] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 03/26/2024] [Accepted: 04/05/2024] [Indexed: 04/21/2024]
Abstract
Glucocerebrosidase 1 (GBA1) mutations are the most important genetic risk factors for Parkinson's disease (PD). Clinically, mild (e.g., p.N370S) and severe (e.g., p.L444P and p.D409H) GBA1 mutations have different PD phenotypes, with differences in age at disease onset, progression, and the severity of motor and non-motor symptoms. We hypothesize that GBA1 mutations cause the accumulation of α-synuclein by affecting the cross-talk between cellular protein degradation mechanisms, leading to neurodegeneration. Accordingly, we tested whether mild and severe GBA1 mutations differentially affect the degradation of α-synuclein via the ubiquitin-proteasome system (UPS), chaperone-mediated autophagy (CMA), and macroautophagy and differentially cause accumulation and/or release of α-synuclein. Our results demonstrate that endoplasmic reticulum (ER) stress and total ubiquitination rates were significantly increased in cells with severe GBA1 mutations. CMA was found to be defective in induced pluripotent stem cell (iPSC)-derived dopaminergic neurons with mild GBA1 mutations, but not in those with severe GBA1 mutations. When examining macroautophagy, we observed reduced formation of autophagosomes in cells with the N370S and D409H GBA1 mutations and impairments in autophagosome-lysosome fusion in cells with the L444P GBA1 mutation. Accordingly, severe GBA1 mutations were found to trigger the accumulation and release of oligomeric α-synuclein in iPSC-derived dopaminergic neurons, primarily as a result of increased ER stress and defective macroautophagy, while mild GBA1 mutations affected CMA, which is mainly responsible for the degradation of the monomeric form of α-synuclein. Overall, our findings provide new insight into the molecular basis of the clinical variability in PD associated with different GBA1 mutations.
Collapse
Affiliation(s)
- G Onal
- Department of Physiology, Anatomy and Genetics, Kavli Institute for NanoScience Discovery, University of Oxford, Oxford, UK
- Oxford Parkinson's Disease Centre, University of Oxford, Oxford, UK
| | - G Yalçın-Çakmaklı
- Department of Neurology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - C E Özçelik
- National Nanotechnology Research Center, UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey
| | - I Boussaad
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - U Ö Ş Şeker
- Interdisciplinary Neuroscience Program, National Nanotechnology Research Center, UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey
| | - Hugo J R Fernandes
- Department of Physiology, Anatomy and Genetics, Kavli Institute for NanoScience Discovery, University of Oxford, Oxford, UK
- Oxford Parkinson's Disease Centre, University of Oxford, Oxford, UK
| | - H Demir
- Department of Pediatric Gastroenterology, Hepatology and Nutrition, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - R Krüger
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, Esch-sur-Alzette, Luxembourg
- Transversal Translational Medicine, Luxembourg Institute of Health (LIH), Strassen, Luxembourg
- Parkinson Research Clinic, Centre Hospitalier de Luxembourg (CHL), Luxembourg City, Luxembourg
| | - B Elibol
- Department of Neurology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - S Dökmeci
- Department of Medical Biology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - M M Salman
- Department of Physiology, Anatomy and Genetics, Kavli Institute for NanoScience Discovery, University of Oxford, Oxford, UK
- Oxford Parkinson's Disease Centre, University of Oxford, Oxford, UK
| |
Collapse
|
2
|
Demir H, Caglayan D, Kaman O, İnanc M, Urvay S, Beypinar I, Demirci A, Davarci SE, Araz M, Baykara M, Artac M, Yildiz F. Evaluating the effect of tumor size and sidedness on prognosis in stage 2 colon cancer: a retrospective population study. Eur Rev Med Pharmacol Sci 2022; 26:1328-1340. [PMID: 35253189 DOI: 10.26355/eurrev_202202_28126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE In this study, we aimed to evaluate the effect of tumor size and tumor sidedness on prognosis in patients with stage 2 colon cancer. PATIENTS AND METHODS Data of 501 patients diagnosed with stage 2 colon cancer were evaluated retrospectively. It was evaluated whether the patients' age, gender, tumor differentiation, tumor node metastasis (TNM) stage, overall survival rate, and disease-free survival rate had any correlation with horizontal tumor diameter and tumor sidedness. In the ROC analysis performed to determine the cut-off value for the tumor diameter, which we think will predict survival, no significant results were obtained with maximum sensitivity and specificity. Therefore, the median value of the tumor diameter, which is 5 cm, was accepted as the cut-off value. Kaplan-Meier method and Cox regression analysis were used for survival analysis and determination of prognostic factors. RESULTS When the patients were evaluated in terms of tumor localization, 189 (37.7%) patients had right colon tumors and 312 (62.3%) patients had left colon tumors. There was no statistically significant difference in terms of disease-free survival and overall survival according to tumor localization. When the patients were analyzed by dividing them into two groups according to the horizontal tumor size (<5 cm and ≥5 cm), no statistically significant difference was found between the groups in terms of disease-free survival (DFS) and overall survival (OS) p=0.085, p=0.699, respectively. CONCLUSIONS Our results suggest that the management of patients with stage 2 colon cancer requires a better understanding of tumor biology rather than features such as tumor size and localization.
Collapse
Affiliation(s)
- H Demir
- Department of Internal Medicine and Medical Oncology, Afyonkarahisar Health Sciences University School of Medicine, Afyonkarahisar, Turkey.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
3
|
Demir H, Beypinar I, Urvay S, Davarcı SE, Baykara M. Prognostic role of pre-operative serum ferritin level in stage 2 colon cancer. Eur Rev Med Pharmacol Sci 2021; 25:6473-6479. [PMID: 34787851 DOI: 10.26355/eurrev_202111_27091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE In this study, we aimed to evaluate the prognostic value of preoperative serum ferritin level in patients with stage 2 colon cancer who underwent curative surgery. PATIENTS AND METHODS The data of 120 patients who were stage 2 after curative surgery and whose ferritin levels were measured at the time of diagnosis without starting any treatment were analyzed. Demographic data such as age and gender, histopathological characteristics such as tumor size, lymphovascular invasion (LVI), perineural invasion (PNI), number of removed lymph nodes, tumor grade, and clinical and laboratory data were retrieved from the hospital medical charts or electronic medical records. In the survival analysis, the cut-off level of ferritin was accepted as 150 ng/ml, which is the upper limit determined by the World Health Organization (WHO), as a prognostic factor. RESULTS Fifty (41.7%) of the patients were female, 70 (58.3%) were male, and the median age was 63.5 (range 24-90) years. There was no significant difference between the low and high ferritin groups regarding age, gender, T stage, tumor localization, histological subtype, PNI, LVI, removal of less than 12 lymph nodes, and tumor size. Disease-free survival and overall survival of patients with high ferritin levels were worse than patients with low ferritin levels, but this difference did not reach statistical significance. CONCLUSIONS Serum ferritin level is an easily monitored, cost-effective, and reproducible marker. İn this study we found that high ferritin level was associated with poor survival, although it was not statistically significant.
Collapse
Affiliation(s)
- H Demir
- Department of Internal Medicine and Medical Oncology, Afyon Health Sciences University School of Medicine, Afyonkarahisar, Turkey.
| | | | | | | | | |
Collapse
|
4
|
Guner S, Guner SI, Gokalp MA, Ceylan MF, Unsal SS, Demir H. Do the trace elements play a role in the etiopathogenesis of developmental dysplasia of hip? Eur Rev Med Pharmacol Sci 2019; 22:910-913. [PMID: 29509237 DOI: 10.26355/eurrev_201802_14369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Alterations in the connective tissue of the hip joint capsule and ligaments might account for the increased laxity seen in patients with developmental dysplasia of the hip. The tensile features of the connective tissue depend on collagen. A number of prior studies have noted the association between the trace elements and collagen biosynthesis. The aim of this research is to determine whether there exists an association between the trace elements and developmental dysplasia of the hip. PATIENTS AND METHODS This investigation included 27 patients with developmental dysplasia of the hip (18 females and nine males; mean age 24.3 ± 6.3 months, range 18–36 months) and 26 healthy controls (15 females and 11 males; mean age 23.8 ± 5.4 months, range 18-36 months). The levels of the serum trace elements in the groups were statistically compared. RESULTS The Cu levels of the patients with developmental dysplasia of hip were statistically higher than those of the control group (p<0.05). The Zn, Fe, Mg, and Mn levels of the patients with developmental dysplasia of hip were statistically lower than those of the control group (p<0.05). CONCLUSIONS We found an association between developmental dysplasia of the hip and the serum trace element levels. We, therefore, believe that the trace element levels may shed light on the etiopathogenesis of developmental dysplasia of the hip. This work should be supported by future studies concerning the causes of the alterations in the serum trace element levels seen in patients with developmental dysplasia of the hip.
Collapse
Affiliation(s)
- S Guner
- Department of Trauma and Orthopedic Surgery, Medical School of Yuzuncu Yil University, Van, Turkey.
| | | | | | | | | | | |
Collapse
|
5
|
Cuce E, Demir H, Cuce I, Bayram F. Hypothalamic-pituitary-adrenal axis function in traumatic spinal cord injury-related neuropathic pain: a case-control study. J Endocrinol Invest 2019; 42:923-930. [PMID: 30623304 DOI: 10.1007/s40618-019-1002-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 01/04/2019] [Indexed: 12/15/2022]
Abstract
PURPOSE This study aimed to investigate the hypothalamic-pituitary-adrenal (HPA) axis in spinal cord injury (SCI)-related neuropathic pain (NP) using dynamic adrenocorticotropic hormone (ACTH) stimulation tests. METHODS This case-control study was conducted with 22 patients diagnosed with traumatic chronic spinal cord injury (15 with and 7 without neuropathic pain) and ten age- and sex-matched healthy control subjects. Collected data included socio-demographic variables, SCI characteristics, and level of NP using a numeric rating scale (NRS) and the Leeds Assessment of Neuropathic Symptoms and Signs pain scale (LANSS). HPA axis function was measured via low-dose (1 μg) and standard-dose (250 μg) ACTH tests (LDT and SDT, respectively). RESULTS No significant differences existed regarding peak cortisol responses or area under the curve (AUC) of cortisol responses between the SCI patients with NP and healthy controls using LDT and SDT. In the SCI patients without pain, cortisol responses were significantly lower than those in the healthy controls for LDT and SDT. Peak cortisol and AUC responses of the LDT and SDT were positively correlated with NRS in SCI patients with NP. CONCLUSIONS This study demonstrated that, in chronic SCI patients with NP, basal cortisol levels are relatively higher compared to healthy controls, and that HPA axis can be activated with low- and standard-dose ACTH stimulation tests. Although NP following SCI was not significantly associated with hypo- or hypercortisolemia, either after low- or standard-dose ACTH stimulation test, the severity of NP during chronic SCI may be positively associated with HPA axis activity.
Collapse
Affiliation(s)
- E Cuce
- Department of Physical Medicine and Rehabilitation, Adiyaman University Training and Research Hospital, Yunus Emre Mah. 1164 Sk. No: 13, 02000, Merkez, Adiyaman, Turkey
| | - H Demir
- Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - I Cuce
- Department of Physical Medicine and Rehabilitation, Adiyaman University Training and Research Hospital, Yunus Emre Mah. 1164 Sk. No: 13, 02000, Merkez, Adiyaman, Turkey.
| | - F Bayram
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| |
Collapse
|
6
|
Demir H, Can A. Effect of various levels of dietary whole cottonseed on blood parameters and performance of Awassi lambs under heat stress. S AFR J ANIM SCI 2019. [DOI: 10.4314/sajas.v49i1.6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
7
|
Karahan M, Yildirim M, Kucuk HF, Turunc V, Demir H, Salturk C, Yavuz A, Demir T, Ari E. Oxidative DNA Damage Is Increased in Living Kidney Donors. Transplant Proc 2019; 51:1049-1053. [PMID: 31101169 DOI: 10.1016/j.transproceed.2019.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 02/16/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND Long-term consequences of donor nephrectomy might be reduced kidney function, increased risk for cardiovascular disease, and impaired quality of life. The purpose of the current cross-sectional study was to evaluate the relationship between clinical, laboratory, and donation-specific outcomes of living kidney donors and systemic oxidative DNA damage. METHODS We conducted a cross-sectional study and assessed retrospectively pre- and postdonation data from 60 donors who donated between 2010 and 2015. Plasma malondialdehyde levels and 8-hydroxy-2'-deoxyguanosine/deoxyguanosine ratio (8-OHdG/dG ratio) were determined as oxidative stress markers. Catalase, carbonic anhydrase, and paraoxonase (PON) activities were measured as antioxidants. RESULTS Approximately 3 years after donation, the hypertensive donor ratio was 12%, and 11% of the donors had glomerular filtration rate <60 mL/min/1.73 m2. Mean serum urea (P = .001) and serum creatinine levels (P = .001) were increased; creatinine clearance level (126.2 ± 35.5 vs 94.6 ± 26.8, P = .001) was decreased in the postdonation period. There was a significant positive correlation between predonation serum urea and 8-0HdG/dG ratio (r = 0.338, P = .016) and predonation serum creatinine and 8-0HdG/dG ratio (r = 0.442, P = .001), while there was a significant negative correlation between serum creatinine and PON activity (r = -0.545, P < .001). CONCLUSION Our data have demonstrated that kidney donors exhibit increased oxidative DNA damage and decreased antioxidant activity. We propose that predonation serum creatinine is positively correlated with 8-0HdG/dG ratio and negatively correlated with antioxidant PON activity. This is the first study to demonstrate that plasma oxidative DNA damage increases in healthy kidney donors.
Collapse
Affiliation(s)
- M Karahan
- Department of General Surgery, Kartal Training Hospital, Istanbul, Turkey
| | - M Yildirim
- Department of Transplantation, Kartal Training Hospital, Istanbul, Turkey
| | - H F Kucuk
- Department of Transplantation, Kartal Training Hospital, Istanbul, Turkey
| | - V Turunc
- Bahcesehir University, Department of General Surgery, Istanbul, Turkey
| | - H Demir
- Department of Biochemistry, Yuzuncu Yil University, Van, Turkey
| | - C Salturk
- Department of Chest Diseases, Yeniyuzyil University, Istanbul, Turkey
| | - A Yavuz
- Department of Nephrology, Tekirdag State Hospital, Tekirdag, Turkey
| | - T Demir
- Department of Transplantation, Kartal Training Hospital, Istanbul, Turkey
| | - E Ari
- Bahcesehir University, Department of Nephrology, Istanbul, Turkey.
| |
Collapse
|
8
|
Esin E, Oksuzoglu B, Bilici A, Cicin I, Kostek O, Kaplan MA, Aksoy S, Aktas BY, Ozdemir O, Alacacioglu A, Cabuk D, Sumbul AT, Sakin A, Paydas S, Yetisir E, Er O, Korkmaz T, Yildirim N, Sakalar T, Demir H, Artac M, Karaagac M, Harputluoglu H, Bilen E, Erdur E, Degirmencioglu S, Aliyev A, Cil T, Olgun P, Basaran G, Gumusay O, Demir A, Tanrikulu E, Yumuk PF, Imamoglu I, Oyan B, Cetin B, Haksoyler V, Karadurmus N, Erturk I, Evrensel T, Yilmaz H, Beypinar I, Kocer M, Pilanci KN, Seker M, Urun Y, Yildirim N, Eren T, Demirci U. Pertuzumab, trastuzumab and taxane-based treatment for visceral organ metastatic, trastuzumab-naïve breast cancer: real-life practice outcomes. Cancer Chemother Pharmacol 2018; 83:131-143. [PMID: 30377778 DOI: 10.1007/s00280-018-3712-7] [Citation(s) in RCA: 8] [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: 07/06/2018] [Accepted: 10/25/2018] [Indexed: 01/19/2023]
Abstract
PURPOSE In this study, we aimed to describe the real-life practice outcomes of pertuzumab-trastuzumab-taxane (PTT) combination in visceral organ metastatic, trastuzumab-naive breast cancer (BC) patients. METHODS This study was conducted by Turkish Oncology Group and included 317 patients' data from 36 centers. RESULTS Median age was 51 (22-82). Median PFS was 28.5 months, while median OS was 40.3 months. Patients with brain metastases (n: 13, 4.1%) had worse PFS (16.8 m vs. 28.5 m; p = 0.002) and OS (26.7 m vs. 40.3 m; p = 0.009). Patients older than 65 years of age (n: 42, 13.2%) had significantly lower OS results (19.8 m vs. 40.3 m; p = 0.01). Two hundred sixty-eight patients (86.7%) received docetaxel while 37 patients (11.7%) received paclitaxel. PFS and OS were similar between taxane groups. In eight patients (2.5%), 5-40% ejection fraction decrement from baseline was detected without any clinical sign of heart failure. CONCLUSIONS Our RLP trial included only visceral metastatic, trastuzumab-naïve BC patients including cases with brain involvement who received PTT combination in the first-line treatment. Regardless of negative prognostic characteristics, our results are in parallel with pivotal trial. Further strategies for brain metastasis should be developed to improve outcomes despite encouraging results with PTT treatment. Taxane selection can be personalized and endocrine maintenance may further improve outcomes after taxanes were discontinued. To our knowledge, this is the largest scale real-life clinical practice study of pertuzumab-trastuzumab-taxane therapy to date.
Collapse
MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Antibodies, Monoclonal, Humanized/administration & dosage
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Breast Neoplasms/drug therapy
- Breast Neoplasms/mortality
- Breast Neoplasms/pathology
- Carcinoma, Ductal, Breast/drug therapy
- Carcinoma, Ductal, Breast/mortality
- Carcinoma, Ductal, Breast/secondary
- Carcinoma, Lobular/drug therapy
- Carcinoma, Lobular/mortality
- Carcinoma, Lobular/secondary
- Docetaxel/administration & dosage
- Female
- Follow-Up Studies
- Humans
- Middle Aged
- Neoplasm Invasiveness
- Neoplasm Metastasis
- Paclitaxel/administration & dosage
- Practice Patterns, Physicians'
- Prognosis
- Retrospective Studies
- Survival Rate
- Trastuzumab/administration & dosage
- Young Adult
Collapse
Affiliation(s)
- Ece Esin
- Department of Medical Oncology, Dr. A. Y. Ankara Oncology Education and Research Hospital, University of Health Sciences, Yenimahalle, Ankara, Turkey.
| | - B Oksuzoglu
- Department of Medical Oncology, Dr. A. Y. Ankara Oncology Education and Research Hospital, University of Health Sciences, Yenimahalle, Ankara, Turkey
| | - A Bilici
- Departmant of Medical Oncology, Medipol University International Health Center, Istanbul, Turkey
| | - I Cicin
- Department of Medical Oncology, Trakya University, Edirne, Turkey
| | - O Kostek
- Department of Medical Oncology, Trakya University, Edirne, Turkey
| | - M A Kaplan
- Department of Medical Oncology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey
| | - S Aksoy
- Department of Medical Oncology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - B Y Aktas
- Department of Medical Oncology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - O Ozdemir
- Department of Medical Oncology, Ataturk Education and Research Hospital, İzmir K.C. University, Izmir, Turkey
| | - A Alacacioglu
- Department of Medical Oncology, Ataturk Education and Research Hospital, İzmir K.C. University, Izmir, Turkey
| | - D Cabuk
- Department of Medical Oncology, Faculty of Medicine, Kocaeli University, Izmit, Turkey
| | - A T Sumbul
- Department of Medical Oncology, Baskent University Adana Hospital, Adana, Turkey
| | - A Sakin
- Department of Medical Oncology, Istanbul Okmeydani Education and Research Hospital, Istanbul, Turkey
| | - S Paydas
- Department of Medical Oncology, Faculty of Medicine, Cukurova University, Adana, Turkey
| | - E Yetisir
- Department of Medical Oncology, Faculty of Medicine, Cukurova University, Adana, Turkey
| | - O Er
- Department of Medical Oncology, Acibadem Maslak Hospital, Acibadem MAA University, Istanbul, Turkey
| | - T Korkmaz
- Department of Medical Oncology, Acibadem Altunizade Hospital, Acibadem MAA University, Istanbul, Turkey
| | - N Yildirim
- Department of Medical Oncology, Dr. Ersin Arslan Training and Research Hospital, Gaziantep, Turkey
| | - T Sakalar
- Department of Medical Oncology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - H Demir
- Department of Medical Oncology, Kayseri Education and Research Hospital, University of Health Sciences, Kayseri, Turkey
| | - M Artac
- Department of Medical Oncology, Meram Medical Faculty, Necmettin Erbakan University, Konya, Turkey
| | - M Karaagac
- Department of Medical Oncology, Meram Medical Faculty, Necmettin Erbakan University, Konya, Turkey
| | - H Harputluoglu
- Department of Medical Oncology, Turgut Ozal Medical Center, Inonu University, Malatya, Turkey
| | - E Bilen
- Department of Medical Oncology, Turgut Ozal Medical Center, Inonu University, Malatya, Turkey
| | - E Erdur
- Department of Medical Oncology, Dr. A. Y. Ankara Oncology Education and Research Hospital, University of Health Sciences, Yenimahalle, Ankara, Turkey
| | - S Degirmencioglu
- Department of Medical Oncology, Faculty of Medicine, Pamukkale University, Denizli, Turkey
| | - A Aliyev
- Department of Medical Oncology, Faculty of Medicine, Bezmialem University, Istanbul, Turkey
| | - T Cil
- Department of Medical Oncology, Adana City Hospital, University of Health Sciences, Adana, Turkey
| | - P Olgun
- Department of Medical Oncology, Adana City Hospital, University of Health Sciences, Adana, Turkey
| | - G Basaran
- Department of Medical Oncology, Acibadem Maslak Hospital, Acibadem MAA University, Istanbul, Turkey
| | - O Gumusay
- Department of Medical Oncology, Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey
| | - A Demir
- Department of Medical Oncology, Istanbul Okmeydani Education and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - E Tanrikulu
- Department of Medical Oncology, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - P F Yumuk
- Department of Medical Oncology, Faculty of Medicine, Marmara University, Istanbul, Turkey
| | - Inanc Imamoglu
- Department of Medical Oncology, Ankara Diskapi Education and Research Hospital, University of Health Sciences, Ankara, Turkey
| | - B Oyan
- Department of Medical Oncology, Acibadem Altunizade Hospital, Acibadem MAA University, Istanbul, Turkey
| | - B Cetin
- Department of Medical Oncology, Faculty of Medicine, RTE University, Rize, Turkey
| | - V Haksoyler
- Department of Medical Oncology, Diyarbakir G.Y. Education and Research Hospital, University of Health Sciences, Diyarbakir, Turkey
| | - N Karadurmus
- Department of Medical Oncology, Gulhane Education and Research Hospital, University of Health Sciences, Ankara, Turkey
| | - I Erturk
- Department of Medical Oncology, Gulhane Education and Research Hospital, University of Health Sciences, Ankara, Turkey
| | - T Evrensel
- Department of Medical Oncology, Faculty of Medicine, Uludag University, Bursa, Turkey
| | - H Yilmaz
- Department of Medical Oncology, Faculty of Medicine, Uludag University, Bursa, Turkey
| | - I Beypinar
- Department of Medical Oncology, Faculty of Medicine, Afyon Kocatepe University, Afyon, Turkey
| | - M Kocer
- Department of Medical Oncology, Faculty of Medicine, Isparta S.D University, Isparta, Turkey
| | - K N Pilanci
- Department of Medical Oncology, Haseki Education and Research Hospital, University of Health Sciences, Istanbul, Turkey
| | - M Seker
- Department of Medical Oncology, Ankara Bayindir Hospital, Ankara, Turkey
| | - Y Urun
- Department of Medical Oncology, Faculty of Medicine, Ankara University, Ankara, Turkey
| | - N Yildirim
- Department of Medical Oncology, Numune Education and Research Hospital, University of Health Sciences, Ankara, Turkey
| | - T Eren
- Department of Medical Oncology, Numune Education and Research Hospital, University of Health Sciences, Ankara, Turkey
| | - U Demirci
- Department of Medical Oncology, Dr. A. Y. Ankara Oncology Education and Research Hospital, University of Health Sciences, Yenimahalle, Ankara, Turkey
| |
Collapse
|
9
|
Ilgaz F, Serel Arslan S, Boyraz M, Demir N, Demir H, Saltık Temizel I, Karaduman A, Özen H, Yüce A, Gökmen Özel H. Screening of dysphagia and malnutrition risk in hospitalized children: Preliminary findings from a pilot study. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
10
|
Yıldırım D, Göktaş M, Demir H, Saltık Temizel I, Özen H, Yüce A, Gökmen Özel H. Preferred gluten free cereals in children with celiac disease. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
11
|
Yildirim M, Karahan M, Kucuk H, Demir T, Demir H, Turan H, Yavuz A, Ari E. Increased Oxidative Stress in Living Kidney Donors: Correlation of Renal Functions With Antioxidant Capacity. Transplant Proc 2017; 49:407-410. [DOI: 10.1016/j.transproceed.2017.01.028] [Citation(s) in RCA: 4] [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: 01/10/2023]
|
12
|
Aydemir Y, Pınar A, Hızal G, Demir H, Saltık Temizel İN, Özen H, Akbıyık F, Yüce A. Neutrophil volume distribution width as a new marker in detecting inflammatory bowel disease activation. Int J Lab Hematol 2016; 39:51-57. [DOI: 10.1111/ijlh.12574] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 07/29/2016] [Indexed: 01/07/2023]
Affiliation(s)
- Y. Aydemir
- Department of Pediatric Gastroenterology, Hepatology and Nutrition; Hacettepe University School of Medicine; Ankara Turkey
| | - A. Pınar
- Department of Medical Biochemistry; Hacettepe University School of Medicine; Ankara Turkey
| | - G. Hızal
- Department of Pediatric Gastroenterology, Hepatology and Nutrition; Hacettepe University School of Medicine; Ankara Turkey
| | - H. Demir
- Department of Pediatric Gastroenterology, Hepatology and Nutrition; Hacettepe University School of Medicine; Ankara Turkey
| | - İ. N. Saltık Temizel
- Department of Pediatric Gastroenterology, Hepatology and Nutrition; Hacettepe University School of Medicine; Ankara Turkey
| | - H. Özen
- Department of Pediatric Gastroenterology, Hepatology and Nutrition; Hacettepe University School of Medicine; Ankara Turkey
| | - F. Akbıyık
- Department of Medical Biochemistry; Hacettepe University School of Medicine; Ankara Turkey
| | - A. Yüce
- Department of Pediatric Gastroenterology, Hepatology and Nutrition; Hacettepe University School of Medicine; Ankara Turkey
| |
Collapse
|
13
|
Karadas S, Aslan M, Ceylan MR, Sunnetcioglu M, Bozan N, Kara H, Demir H. Serum paraoxonase activity and oxidative stress levels in patients with cutaneous anthrax. Hum Exp Toxicol 2016; 36:663-669. [PMID: 27461010 DOI: 10.1177/0960327116661020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION Anthrax is a bacterial disease caused by the aerobic sporeforming bacterium Bacillus anthracis. It has been suggested that oxidative stress plays an important role in the pathogenesis of B. anthracis. The aim of this study was to investigate serum paraoxonase 1 (PON1) activity, catalase activity, malondialdehyde (MDA) levels, and superoxide dismutase (SOD) levels in patients with cutaneous anthrax. MATERIALS AND METHODS Fifteen patients with cutaneous anthrax and 15 healthy controls were enrolled in this study. The serum MDA levels, SOD levels, paraoxonase, arylesterase, and catalase activities were measured using a spectrophotometer. RESULTS The serum SOD levels, paraoxonase, arylesterase, and catalase activities were significantly lower in patients with cutaneous anthrax than in controls (for all, p < 0.001), whereas MDA levels were significantly higher ( p < 0.001). No significant correlation was found between serum paraoxonase activity, arylesterase activity, SOD levels, and MDA levels (all, p > 0.05) in patients with cutaneous anthrax. CONCLUSIONS The current study was the first to show decreased antioxidant levels and increased oxidant levels in patients with cutaneous anthrax. Therefore, decreased PON1 activity may play a role in the pathogenesis of cutaneous anthrax.
Collapse
Affiliation(s)
- S Karadas
- 1 Department of Emergency Medicine, Faculty of Medical, Yuzuncu Yıl University, Van, Turkey
| | - M Aslan
- 2 Department of Internal Medicine, Faculty of Medical, Yuzuncu Yıl University, Van, Turkey
| | - M R Ceylan
- 3 Department of Infectious Disease and Clinical Microbiology, Faculty of Medical, Yuzuncu Yıl University, Van, Turkey
| | - M Sunnetcioglu
- 3 Department of Infectious Disease and Clinical Microbiology, Faculty of Medical, Yuzuncu Yıl University, Van, Turkey
| | - N Bozan
- 4 Department of Otorhinolaryngology, Faculty of Medical, Yuzuncu Yıl University, Van, Turkey
| | - H Kara
- 1 Department of Emergency Medicine, Faculty of Medical, Yuzuncu Yıl University, Van, Turkey
| | - H Demir
- 5 Department of Chemistry, Faculty of Science and Art, Yuzuncu Yıl University, Van, Turkey
| |
Collapse
|
14
|
Karaman K, Ercan M, Demir H, Uzunoglu MY, Bostanci S. Acute intestinal obstruction due to a non-involuted uterus after cesarean section: case report. CLIN EXP OBSTET GYN 2016. [DOI: 10.12891/ceog2048.2016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
|
15
|
Karaman K, Ercan M, Demir H, Yener Uzunoglu M, Bostanci S. Acute intestinal obstruction due to a non-involuted uterus after cesarean section: case report. CLIN EXP OBSTET GYN 2016; 43:146-148. [PMID: 27048040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The involution of the uterus is influenced by a number of factors such as advanced childbearing age, electrolyte disturbances, multiparity, repeated cesarean sections, and vaginal infections. The authors report the management of a clinical case of a 41-year-old female who presented with acute intestinal obstruction due to a non-involuted uterus after cesarean section.
Collapse
|
16
|
Çebi A, Akgun E, Esen R, Demir H, Çifci A. The activities of serum paraoxonase and arylesterase and lipid profile in acute myeloid leukemia: preliminary results. Eur Rev Med Pharmacol Sci 2015; 19:4590-4594. [PMID: 26698256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To investigate the activities of serum paraoxonase-1 (PON1) and arylesterase (ARE), and the lipid profile in newly diagnosed acute myeloid leukemia (AML) patients. PATIENTS AND METHODS Thirty-two persons (16 of AML and 16 of healthy control) were included to the study. PON1 and ARE activities were measured as spectrophotometrically in serum samples. High density lipoprotein (HDL), low density lipoprotein (LDL), total cholesterol (TC), triglyceride (TG) were analyzed in autoanalyzer. RESULTS PON1 activities were respectively 16.04 U/L and 18.6 U/L in AML and healthy controls. There was no statistical significance between groups (p > 0.05). The mean ARE activities were respectively 0.21 U/L and 0.36 U/L in AML and healthy controls. Serum ARE activity significantly decreased in AML group (p < 0.001). Serum HDL values were significantly decreased (181.8 ± 76.2 mg/dl; p = 0.002) in AML. There was no difference in total cholesterol, LDL and triglyceride values (respectively; 181.8 ± 76.2 mg/dl, 120.6 ± 64.6 mg/dl, 157.3 ± 87.2 mg/dl; p > 0.05) between AML and controls. CONCLUSIONS This is the first documented study about serum PON1 activity in AML patients. Although serum PON1 activities were not changed in both groups, our data suggest that the decreased serum ARE activity and HDL levels may be related the pathogenesis of AML.
Collapse
Affiliation(s)
- A Çebi
- 1Giresun University, Faculty of Health Sciences, Piraziz/Giresun, Turkey.
| | | | | | | | | |
Collapse
|
17
|
Ciftci E, Demirsoy U, Anik Y, Gorur G, Corapcioglu F, Demir H. Staging and evaluation of neoadjuvant chemotherapy response with 18F-FDG PET/CT in NUT-midline carcinoma in a child: A case report and review of the literature. Rev Esp Med Nucl Imagen Mol 2015. [DOI: 10.1016/j.remnie.2014.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
18
|
Ciftci E, Demirsoy U, Anik Y, Gorur G, Corapcioglu F, Demir H. Staging and evaluation of neoadjuvant chemotherapy response with ¹⁸F-FDG PET/CT in NUT-midline carcinoma in a child: a case report and review of the literature. Rev Esp Med Nucl Imagen Mol 2014; 34:53-5. [PMID: 25304847 DOI: 10.1016/j.remn.2014.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Revised: 08/28/2014] [Accepted: 08/30/2014] [Indexed: 12/20/2022]
Abstract
NUT midline carcinoma (NMC) is a newly defined and lethal cancer with aggressive course. It mostly affects children and young adults. Diagnosis is confirmed with the evidence of BRD4-NUT mutation on the chromosome 15q14 by fluorescence in situ hybridization. Use of (18)F-FDG PET/CT in NMC patients is very limited in the literature. In this report, we describe a 7-year-old boy with the diagnosis of NMC who was scanned with (18)F-FDG PET/CT for staging and treatment response evaluation after the chemotherapy. It was disseminated and had moderate FDG avidity in the initial scan and showed progression after 4 cycles of chemotherapy. We also reviewed the literature related to (18)F-FDG PET/CT in staging and assessment of chemotherapy response of NMC.
Collapse
Affiliation(s)
- E Ciftci
- Department of Nuclear Medicine, Faculty of Medicine, University of Kocaeli, Kocaeli, Turkey.
| | - U Demirsoy
- Department of Pediatric Oncology, Faculty of Medicine, University of Kocaeli, Kocaeli, Turkey.
| | - Y Anik
- Department of Radiology, Faculty of Medicine, University of Kocaeli, Kocaeli, Turkey.
| | - G Gorur
- Department of Nuclear Medicine, Faculty of Medicine, University of Kocaeli, Kocaeli, Turkey.
| | - F Corapcioglu
- Department of Pediatric Oncology, Faculty of Medicine, University of Kocaeli, Kocaeli, Turkey.
| | - H Demir
- Department of Nuclear Medicine, Faculty of Medicine, University of Kocaeli, Kocaeli, Turkey.
| |
Collapse
|
19
|
Sendur M, Aksoy S, Uncu D, Demir H, Yuksel S, Ekinci A, Kaplan M, Ustaalioglu B, Tufan G, İnanc M, Ozdemir N, Artac M, Taştekin D, Kacan T, Oguz A, Arpaci E, Yazılıtas D, Gumus M, Zengin N, Altundag M. Efficacy of Adjuvant 9-Weeks Trastuzumab in Node-Negative T1A/B Her2-Positive Breast Cancer. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu327.44] [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: 11/14/2022] Open
|
20
|
Karadas S, Aslan M, Gonullu H, Kati C, Duran L, Olmez S, Kucukoglu ME, Demir H. Acetaminophen intoxication is associated with decreased serum paraoxonase and arylesterase activities and increased lipid hydroperoxide levels. Hum Exp Toxicol 2014; 33:1134-40. [PMID: 24501102 DOI: 10.1177/0960327113511477] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Acetaminophen is at present one of the most commonly used analgesics and antipyretics. Recent evidence has suggested that oxidative stress is involved in the mechanism of acetaminophen intoxication. Paraoxonase-1 (PON1) plays an important role as an endogenous free-radical scavenging molecule. The aim of this study was to evaluate the influence of serum PON1 activity and oxidative stress in patients with acetaminophen intoxication. METHODS A total of 20 patients with acetaminophen intoxication and 25 healthy controls were enrolled. Serum total antioxidant capacity (TAC), lipid hydroperoxide (LOOH) levels, and paraoxonase and arylesterase activities were measured spectrophotometrically. RESULTS The serum TAC levels and the paraoxonase and arylesterase activities were significantly lower in patients with acetaminophen intoxication compared with controls (all, p < 0.001), while the serum LOOH levels were significantly higher (p < 0.001). CONCLUSIONS Our results suggest that decreased PON1 activity seems to be associated with increased oxidative stress in patients with acetaminophen intoxication. Measuring serum PON1 activity may be useful in assessing the development of toxicity risk in acetaminophen toxicity. It would be useful to recommend vitamins with antioxidant effects such as vitamins C and E along with medical treatments.
Collapse
Affiliation(s)
- S Karadas
- Department of Emergency Medicine, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey
| | - M Aslan
- Department of Internal Medicine, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey
| | - H Gonullu
- Department of Emergency Medicine, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey
| | - C Kati
- Department of Emergency Medicine, Ondokuz Mayis University, Samsun, Turkey
| | - L Duran
- Department of Emergency Medicine, Ondokuz Mayis University, Samsun, Turkey
| | - S Olmez
- Department of Gastroenterology, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey
| | - M E Kucukoglu
- Department of Internal Medicine, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey
| | - H Demir
- Department of Chemistry, Faculty of Science and Arts, Yuzuncu Yil University, Van, Turkey
| |
Collapse
|
21
|
Abstract
This study was carried out to determine the effects of electromagnetic field (EMF) emitted by cellular phones (CPs) on electrocardiograms (ECGs) of guinea pigs. A total of 30 healthy guinea pigs weighing 500-800 g were used. After 1 week of adaptation period, animals were randomly divided into two groups: control group (n = 10) and EMF-exposed group (n = 20). Control guinea pigs were housed in a separate room without exposing them to EMFs of CPs. Animals in second group were exposed to 890-915 MHz EMF (217 Hz of pulse rate, 2 W of maximum peak power and 0.95 wt kg(-1) of specific absorption rate) for 12 h day(-1) (11 h 45 min stand-by and 15 min speaking mode) for 30 days. ECGs of guinea pigs in both the groups were recorded by a direct writing electrocardiograph at the beginning and 10th, 20th and 30th days of the experiment. All ECGs were standardized at 1 mV = 10 mm and with a chart speed of 50 mm sec(-1). Leads I, II, III, lead augmented vector right (aVR), lead augmented vector left (aVL) and lead augmented vector foot (aVF) were recorded. The durations and amplitudes of waves on the trace were measured in lead II. The data were expressed as mean with SEM. It was found that 12 h day(-1) EMF exposure for 30 days did not have any significant effects on ECG findings of guinea pigs. However, this issue needed to be further investigated in a variety of perspectives, such as longer duration of exposure to be able to elucidate the effects of mobile phone-induced EMFs on cardiovascular functions.
Collapse
Affiliation(s)
- I Meral
- 1Department of Physiology, School of Medicine, Bezmialem Vakif University, Istanbul, Turkey
| | | | | |
Collapse
|
22
|
Isgoren S, Demir H, Daglioz-Gorur G, Selek O. Gamma probe guided surgery for osteoid osteoma: Is there any additive value of quantitative bone scintigraphy? ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.remnie.2013.07.009] [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: 10/26/2022]
|
23
|
Isgoren S, Demir H, Daglioz-Gorur G, Selek O. Gamma probe guided surgery for osteoid osteoma: is there any additive value of quantitative bone scintigraphy? Rev Esp Med Nucl Imagen Mol 2013; 32:234-9. [PMID: 23601494 DOI: 10.1016/j.remn.2013.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 02/18/2013] [Accepted: 02/18/2013] [Indexed: 10/26/2022]
Abstract
OBJECTIVE The aim of this study is to evaluate the efficiency of gamma probe guided osteoid osteoma surgery and the applicability of quantitative analyses obtained from preoperative bone scan images. MATERIAL AND METHODS This study involved 12 osteoid osteoma patients who were treated with gamma probe guided surgery after preoperative bone scan. The calculated contrast ratios between nidus and adjacent healthy bone from preoperative bone scan and the calculated percentages of count reduction after resection of nidus during intraoperative gamma probe application were compared. Patients were followed up for any recurrence or complications. RESULTS The mean contrast ratio between nidus and adjacent healthy bone calculated from preoperative bone scan was 43.6% (range 33-53%). Following the nidus excision, an average of 55.8% (range 28-73%) count reduction was estimated with gamma probe in the tumor area. There was no correlation between preoperative scintigraphic contrast ratio and intraoperative gamma probe count reduction ratio (r = 0.46, p = 0.13). Complete cure was achieved in 11 (92%) patients with single operation, during the postoperative follow up period. None of the patients had any major or minor complications during or after the surgery. CONCLUSIONS Due to high clinical success and low complication rate in osteoid osteoma surgery, gamma probe application is an effective and safe method that should be used more extensively in daily practice.
Collapse
Affiliation(s)
- S Isgoren
- Department of Nuclear Medicine, Kocaeli University Faculty of Medicine, Kocaeli, Turkey.
| | | | | | | |
Collapse
|
24
|
Eroglu SE, Tezel S, Salcin E, Denizbasi A, Onur O, Ozpolat C, Demir H. An Unusual Complication following Unconventional Use of High Pressure Injector. HONG KONG J EMERG ME 2013. [DOI: 10.1177/102490791302000208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
High pressure injection injuries most commonly occur in industrial accidents. In accident due to high pressure gun injuries, the nature of injected materials, the degree of toxicity, and the amount injected will affect the clinical outcome. Early vigorous treatment is essential to reduce morbidity. We reported a case of hand injuries due to inadvertent use of a high pressure injector device for haemostasis. 46-year-old male technician tried to stop bleeding from his injured hand by directing air jet from a high pressure injector to the wound resulting in significant subcutaneous emphysema. Adequate training and knowledge on occupational safety should be reinforced to avoid similar accidents.
Collapse
Affiliation(s)
| | | | | | | | | | | | - H Demir
- Fatih Sultan Mehmet Research and Training Hospital, Department of Emergency Medicine, Istanbul, Turkey
| |
Collapse
|
25
|
Yuksel MB, Kavak S, Gecit I, Basel H, Gümrükçüoğlu HA, Demir H, Meral I. Short-term levosimendan treatment protects rat testes against oxidative stress. Braz J Med Biol Res 2012; 45:716-20. [PMID: 22584643 PMCID: PMC3854241 DOI: 10.1590/s0100-879x2012007500075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The objective of this study was to evaluate the effect of short-term levosimendan exposure on oxidant/antioxidant status and trace element levels in the testes of rats under physiological conditions. Twenty male Wistar albino rats were randomly divided into two groups of 10 animals each. Group 1 was not exposed to levosimendan and served as control. Levosimendan (12 µg/kg) diluted in 10 mL 0.9% NaCl was administered intraperitoneally to group 2. Animals of both groups were sacrificed after 3 days and their testes were harvested for the determination of changes in tissue oxidant/antioxidant status and trace element levels. Tissue malondialdehyde (MDA) was significantly lower in the levosimendan group (P < 0.001) than in the untreated control group and superoxide dismutase and glutathione peroxidase (GSH-Px) levels were significantly higher in the levosimendan group (P < 0.001). Carbonic anhydrase, catalase and GSH levels were not significantly different from controls. Mg and Zn levels of testes were significantly higher (P < 0.001) and Co, Pb, Cd, Mn, and Cu were significantly lower (P < 0.001) in group 2 compared to group 1. Fe levels were similar for the two groups (P = 0.94). These results suggest that 3-day exposure to levosimendan induced a significant decrease in tissue MDA level, which is a lipid peroxidation product and an indicator of oxidative stress, and a significant increase in the activity of an important number of the enzymes that protect against oxidative stress in rat testes.
Collapse
Affiliation(s)
- M B Yuksel
- Urology Clinic, The State Hospital of Mus, Mus, Turkey
| | | | | | | | | | | | | |
Collapse
|
26
|
Melek M, Demir H, Bilici S, Beger B, Çobanoğlu U, Meral I, Keskin S, Ozmen E. Oxidative Stress and Antioxidant Enzyme Activities in Newborns with Oesophageal Atresia and Their Mothers. J Int Med Res 2012; 40:249-257. [DOI: 10.1177/147323001204000125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
Abstract
OBJECTIVE: To measure the oxidant/antioxidant status of newborn babies with oesophageal atresia and their mothers, compared with healthy control subjects. METHODS: This case—control study included 40 participants: 10 newborns with oesophageal atresia and their mothers, and 10 healthy newborns and their mothers. Whole blood malondialdehyde (MDA) levels and the activities of antioxidant enzymes (catalase, carbonic anhydrase [CA], glucose-6-phosphate dehydrogenase [G-6-PD], and superoxide dismutase [SOD]) were measured. RESULTS: MDA levels and CA activity were significantly higher, and catalase, SOD and G-6-PD activities were significantly lower, in newborns with oesophageal atresia and their mothers than in healthy newborns and their mothers. Although CA activity was similar between the newborns and mothers in the patient group, it was significantly lower in newborns than in mothers in the healthy group. CONCLUSIONS: Increased lipid peroxidation might play an important role in the pathogenesis of oesophageal atresia. Impairment of the free radical/antioxidant balance may lead to increased free radical and decreased antioxidant levels in oesophageal atresia.
Collapse
Affiliation(s)
- M Melek
- Department of Paediatric Surgery, University of Yuzuncu Yil, Van, Turkey
| | - H Demir
- Department of Biochemistry, Art and Science Faculty, University of Yuzuncu Yil, Van, Turkey
| | - S Bilici
- Department of Paediatric Surgery, University of Yuzuncu Yil, Van, Turkey
| | - B Beger
- Department of Paediatric Surgery, University of Yuzuncu Yil, Van, Turkey
| | - U Çobanoğlu
- Department of Thoracic Surgery, University of Yuzuncu Yil, Van, Turkey
| | - I Meral
- Department of Physiology, University of Yuzuncu Yil, Van, Turkey
| | - S Keskin
- Department of Biostatistics, University of Yuzuncu Yil, Van, Turkey
| | - E Ozmen
- Department of Gynaecology, Medical Faculty, University of Yuzuncu Yil, Van, Turkey
| |
Collapse
|
27
|
Gu C, Demir H, Joshi K, Nakamura Y, Yamada R, Gupta S, Kwon CH, Chaudhury AR, Nakano I, Yong R, Yang C, Lonser R, Zhuang Z, Gwak HS, Jo GH, Bogler O, Chwae YJ, Yoo H, Lee SH, Park JB, Burrell K, Jelveh S, Hill R, Zadeh G, Mcellin B, Sirasanagandla S, Mashimo T, Nannepaja S, Vemireddy V, Burma S, Bachoo R. RADIOBIOLOGY. Neuro Oncol 2011. [DOI: 10.1093/neuonc/nor161] [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: 11/15/2022] Open
|
28
|
Abstract
OBJECTIVE We aimed to investigate the serum levels of essential trace elements copper (Cu), zinc (Zn), manganese (Mn), magnesium (Mg) and heavy metals cadmium (Cd), cobalt (Co) and lead (Pb) in the patients with polycystic ovary syndrome (PCOS). METHODS A total of 65 (35 patients with PCOS and 30 healthy controls) women were included in the study. Serum Cu, Zn, Mn, Pb, Mg, Co and Cd levels were analyzed using atomic absorption spectrophotometric method. RESULTS Serum Cu and Zn levels were significantly higher, but Mn and Pb levels were lower in patients with PCOS compared with the healthy participants (p < 0.01). There was no difference between patients with PCOS and the controls with respect to the serum levels of Mg, Co and Cd. CONCLUSIONS This is the first study investigating serum Cu, Zn, Mn, Pb, Co, Mg and Cd levels in the patients with PCOS. The serum levels of trace elements and heavy metals might change in patients with PCOS. The findings in this study should be investigated with further trials in order to obtain new insights into PCOS.
Collapse
Affiliation(s)
- Z Kurdoglu
- Department of Obstetrics and Gynecology, Yuzuncu Yil University, Van, Turkey.
| | | | | | | |
Collapse
|
29
|
Pavel H, Ajeawung N, Faure R, Poirier D, Kamnasaran D, Ajeawung N, Joshi H, Kamnasaran D, Poirier D, Ajeawung N, Kamnasaran D, Lun X, Zemp F, Sun B, Stechishin O, Luchman A, Kelly JJ, Weiss S, Hamilton MG, Cairncross G, Senger DL, Bell J, McFadden G, Forsyth PA, Tzeng SY, Guerrero-Cazares H, Martinez EE, Young NP, Sunshine JC, Quinones-Hinojosa A, Green JJ, Lei L, D'Amico R, Sisti J, Leung R, Sonabend AM, Guarnieri P, Rosenfeld SS, Bruce JN, Canoll P, Baichwal VR, Reeves L, Chad BL, Zavitz KH, Beelen AP, Mather GG, Carlson RO, Manton C, Chandra J, Keir ST, Reardon DA, Saling JR, Gray LS, Bigner DD, Friedman HS, Zhang J, Brun J, Ogbomo H, Zemp F, Wang Z, Stojdl DJ, Lun X, Forsyth PA, Kong LY, Hatiboglu MA, Wei J, Wang Y, McEnery KA, Fuller GN, Qiao W, Davies MA, Priebe W, Heimberger AB, Amendolara B, Gil O, Lei L, Ivkovic S, Bruce J, Canoll P, Rosenfeld S, Finniss S, Perlstein B, Miller C, Okhrimenko H, Kazimirsky G, Cazacu S, Lemke N, Brodie S, Rempel SA, Rosenblum M, Mikkelsen T, Margel S, Brodie C, Guvenc H, Demir H, Gupta S, Mazumder S, Ray-Chaundhury A, Li T, Li C, Nakano I, Rahman R, Rahman C, Smith S, Macarthur D, Rose F, Shakesheff K, Grundy RG, Brenner AJ, Goins B, Bao A, Miller J, Trevino A, Zuniga R, Phillips WT, Gilg AG, Bowers KG, Toole BP, Maria BL, Leung GK, Sun S, Wong ST, Zhang XQ, Pu JK, Lui WM, Marino AM, Hussaini IM, Amos S, Simpson K, Redpath GT, Lyons C, Dipierro C, Grant GA, Wilson C, Salami S, Macaroni P, Li S, Park JY, Needham D, Bigner D, Dewhirst M, Ohlfest J, Gallardo J, Argawal S, Mittapalli R, Donelson R, Elmquist WF, Nicolaides T, Hariono S, Barkovich K, Hashizume R, Rowitch D, Weiss W, Sheer D, Baker S, Paugh B, Waldman T, Li H, Jones C, Forshew T, James D, Caroline H, Patrick R, Katrin L, Karl F, Ghazaleh T, Michael W, Albrecht V, Thorsteinsdottir J, Wagner E, Tonn JC, Ogris M, Schichor C, Charest G, Paquette B, Sanche L, Mathieu D, Fortin D, Qi X, Cuttitta F, Chu Z, Celerier J, Pakradouni J, Rixe O, Hashizume R, Gragg A, Muller S, Banerjee A, Phillips J, Prados M, Haas-Kogan D, Gupta N, James D, Florence L, Gwendoline VG, Veronique M, Robert K, Agarwal S, Mittapalli RK, Cen L, Carlson BL, Elmquist WF, Sarkaria JN, Sengupta S, Weeraratne SD, Rallapalli S, Amani V, Pierre-Francois J, Teider N, Rotenberg A, Cook J, Pomeroy SL, Jenses F, Cho YJ, Hjouj M, Last D, Guez D, Daniels D, Lavee J, Rubinsky B, Mardor Y, Serwer LP, Noble CO, Michaud K, Drummond DC, Ozawa T, Zhou Y, Marks JD, Bankiewicz K, Park JW, James D, Wang W, Cho H, Weintraub M, Jhaveri N, Torres S, Petasis N, Schonthal AH, Louie SG, Hofman FM, Chen TC, Grada Z, Hegde M, Schaffer DR, Ghazi A, Byrd T, Dotti G, Wels W, Heslop HE, Gottschalk S, Baker M, Ahmed N, Hamblett KJ, Kozlosky CJ, Liu H, Siu S, Arora T, Retter MW, Matsuda K, Hill JS, Fanslow WC, Diaz RJ, Etame A, Meaghan O, Mainprize T, Smith C, Hynynen K, Rutka J, Pradarelli J, Yoo JY, Kaka A, Alvarez-Breckenridge C, Pan Q, Chiocca EA, Teknos T, Kaur B, Lee SY, Slagle-Webb B, Sheehan JM, Connor JR, Cote J, Lepage M, Gobeil F, Fortin D, Kleijn A, Balvers R, Kloezeman J, Dirven C, Lamfers M, Leenstra S, See W, Tan IL, Nicolaides T, Pieper R, Jiang H, White E, Rios-Vicil CI, Yung WKA, Gomez-Manzano C, Fueyo J, Zemp FJ, McKenzie BA, Lun X, McFadden G, Forsyth PA, Mueller S, Yang X, Hashizume R, Gragg A, Smirnov I, Prados M, James DC, Phillips JJ, Berger MS, Rowitch DH, Gupta N, Haas-Kogan DH, D'Amico R, Lei L, Kennedy B, Rosenfeld SS, Canoll P, Bruce JN, Gopalakrishnan V, Das C, Taylor P, Kommagani R, Su X, Aguilera D, Thomas A, Wolff J, Flores E, Kadakia M, Alkins R, Broderson P, Sodhi R, Hynynen K, Chung SA, McDonald KL, Shen H, Day BW, Stringer BW, Johns T, Decollogne S, Teo C, Hogg PJ, Dilda PJ, Patel TR, Zhou J, Piepmeier JM, Saltzman WM, Vogelbaum MA, Agarwal S, Manchanda P, Ohlfest JR, Elmquist WF, Kitange GJ, Mladek AC, Carlson BL, Schroeder MA, Pokorny JL, Sarkaria JN, Ogbomo H, Lun X, Zhang J, McFadden G, Mody C, Forsyth P, Dasgupta T, Yang X, Hashizume R, Gragg A, Prados M, Nicolaides T, James CD, Haas-Kogan D, Madhankumar AB, Webb BS, Park A, Harbaugh K, Sheehan J, Connor JR. PRECLINICAL EXPERIMENTAL THERAPEUTICS AND PHARMACOLOGY. Neuro Oncol 2011. [DOI: 10.1093/neuonc/nor158] [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: 11/13/2022] Open
|
30
|
Erler F, Polat E, Demir H, Catal M, Tuna G. Control of mushroom sciarid fly Lycoriella ingenua populations with insect growth regulators applied by soil drench. J Econ Entomol 2011; 104:839-844. [PMID: 21735902 DOI: 10.1603/ec10292] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Mushroom sciarid fly Lycoriella ingenua (Dufour, 1839) comb. nov., is one of the most common fly pests affecting the cultivation of Agaricus bisporus (Lange) Imbach in Turkey. In this study, eight insect growth regulators (IGRs)--diflubenzuron, flufenoxuron, lufenuron, methoprene, novaluron, pyriproxyfen, teflubenzuron, and triflumuron-were tested for their potential to control L. ingenua populations in two successive growing periods. Treatments were targeted at larvae as soil drenches; treatment efficacy was evaluated by assessing adult emergence and larval damage. These products were compared with a control treated with water (negative control) and a conventional chemical insecticide (chlorpyrifos ethyl) (positive control). Treatments with the IGRs caused significant reductions in emerging adult numbers and sporophore damage rates compared with the water-treated control over the two growing periods. Of the IGRs tested, novaluron, diflubenzuron, and teflubenzuron had significantly lower numbers of emerging adults than the rest of the IGRs and chlorpyrifos ethyl-treated control in both periods. Treatments with teflubenzuron, pyriproxyfen, novaluron, and diflubenzuron resulted in significantly lower sporophore damage rates than all other treatments. Compared with negative control, there were no significant yield reductions due to applications of selected IGRs. The results suggest that all the IGRs tested can be used as alternatives to conventional pesticides in controlling L. ingenua populations on mushroom.
Collapse
Affiliation(s)
- F Erler
- Department of Plant Protection, Faculty of Agriculture, Akdeniz University, 07070 Antalya, Turkey.
| | | | | | | | | |
Collapse
|
31
|
Calis M, Kirnap M, Calis H, Mistik S, Demir H. Rehabilitation results of patients with acute transverse myelitis. BRATISL MED J 2011; 112:154-156. [PMID: 21452769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND In this study, we aimed to evaluate the efficacy of rehabilitation in patients with acute transverse myelitis (ATM). METHOD The patients were included in rehabilitation program in the rehabilitation unit. Spasticity of the patients was evaluated by modified Ashworth scale at baseline and at the end of treatment. The functional independence measurement (FIM), Barthel index and functional ambulatory scale (FAS) values were as well evaluated at baseline and at the end of the treatment, and the results were compared to evaluate the efficacy of the rehabilitation program. RESULTS A total of 13 patients (6 males, 7 females) with transverse myelitis were included in the study. The mean +/- SD of age of the patients was 14.30 +/- 3.14. The mean +/- SD of duration of disease was 4.5 +/- 1.85 weeks. There was statistically significant difference in modified Ashworth scale, FIM, and FAS values when the baseline and after treatment values were compared, which indicated improvement due to treatment (p < 0.05). CONCLUSIONS We concluded that in patients with ATM, rehabilitation of patients contributes to clinical and functional improvement of the disease (Tab. 2, Fig. 1, Ref. 23).
Collapse
Affiliation(s)
- M Calis
- Erciyes University Medical School, Department of Physical Medicine and Rehabilitation, Kayseri, Turkey.
| | | | | | | | | |
Collapse
|
32
|
Demir H, Turna H, Can G, Ilvan S. Clinicopathologic and prognostic evaluation of invasive breast carcinoma molecular subtypes and GATA3 expression. J BUON 2010; 15:774-782. [PMID: 21229645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
PURPOSE recently, molecular subclassification of breast carcinomas has been proposed as a new prognostic parameter. METHODS we classified 222 invasive breast carcinoma cases in 5 molecular subtypes by using tissue microarray (TMA) and immunohistochemistry methods. These subtypes were luminal A (estrogen receptor/ER and/or progesterone receptor/ PR positive), luminal B (ER and/or PR positive + HER2 positive), HER2-expressing type (ER and PR negative, HER2 positive), basal-like type (ER, PR and HER2 negative, positive with at least one of these myoepithelial markers: CK5/6, CK14, EGFR) and null type (ER, PR, HER2 and myoepithelial markers negative). We compared these subtypes according to their clinicopathological features and GATA3 expression. RESULTS luminal A was the most frequent subtype. According to overall survival rates, HER2-expressing and basal- like types had the worst prognosis, while luminal A had the best. However, luminal B had the worst prognosis according to disease free survival. Most of the squamous differentiated metaplastic carcinomas were basal-like type. Tubular and mucinous carcinomas were luminal A. Most basal-like tumors were grade III. The majority of grade I tumors were luminal A. GATA3 positivity was associated with low grade tumors and luminal A subtype. CONCLUSION molecular classification can be accepted as an independent prognostic factor for invasive breast carcinomas. GATA3 expression was associated with luminal A and low histological grade. However, it wasn't shown as an independent parameter.
Collapse
MESH Headings
- Adenocarcinoma, Mucinous/metabolism
- Adenocarcinoma, Mucinous/pathology
- Adult
- Aged
- Biomarkers, Tumor/metabolism
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Carcinoma, Ductal, Breast/metabolism
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Lobular/metabolism
- Carcinoma, Lobular/pathology
- Carcinoma, Medullary/metabolism
- Carcinoma, Medullary/pathology
- ErbB Receptors/metabolism
- Female
- GATA3 Transcription Factor/metabolism
- Humans
- Immunoenzyme Techniques
- Keratins/metabolism
- Middle Aged
- Neoplasm Invasiveness
- Prognosis
- Receptor, ErbB-2/metabolism
- Receptors, Estrogen/metabolism
- Receptors, Progesterone/metabolism
- Survival Rate
- Tissue Array Analysis
Collapse
Affiliation(s)
- H Demir
- Department of Pathology, Istanbul University, Cerrahpasa Medical School, Istanbul, Turkey.
| | | | | | | |
Collapse
|
33
|
Uslu N, Demir H, Karagöz T, Saltik-Temizel IN. Dilated cardiomyopathy in celiac disease: role of carnitine deficiency. Acta Gastroenterol Belg 2010; 73:530-531. [PMID: 21299168] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Celiac disease (CD) is an immune-mediated enteropathy in genetically susceptible persons and the disease can present with manifestations in the intestine and in organs outside the gut. An increased prevalence of CD in patients with idiopathic dilated cardiomyopathy or secondary cardiomyopathy and some other cardiac disorders has been reported. Here is described a case of dilated cardiomyopathy in a patient with CD and secondary carnitine deficiency. Dilated cardiomyopathy due to carnitine deficiency may occur in CD patients and carnitine deficiency may present not only at the time of diagnosis of CD but it may also develop during gluten-free diet, particularly in patients with fast weight gain and without carnitine supplementation.
Collapse
Affiliation(s)
- N Uslu
- Section of Gastroenterology, Hepatology and Nutrition,Hacettepe University, Faculty of Medicine, Ankara, Turkey.
| | | | | | | |
Collapse
|
34
|
Akyildiz EU, Oz B, Sehitoglu I, Demir H. The diagnostic utility of maspin in the distinction between malignant mesothelioma and pulmonary adenocarcinoma. J Int Med Res 2010; 38:1070-6. [PMID: 20819444 DOI: 10.1177/147323001003800334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Immunohistochemistry is frequently employed to differentiate between malignant mesothelioma (MM) and pulmonary adenocarcinoma (AC) infiltrating the pleura, but there is uncertainty as to which antibodies are most useful. The present study investigated the presence of the serine protease, maspin, in epithelioid MMs and evaluated the diagnostic utility of maspin for the differential diagnosis between epithelioid MM and pulmonary AC with pleural involvement. The results showed more frequent maspin immunostaining among AC cases compared with MM cases. Maspin positivity was significantly higher among AC cases with respect to both the extent and intensity of staining. A significant difference also existed between the two tumour types with respect to the overall maspin score. Despite these findings, the sensitivity and specificity of maspin positivity to detect AC were only 59% and 73%, respectively, indicating that detection of maspin is of no value for the differential diagnosis of AC and MM.
Collapse
Affiliation(s)
- E U Akyildiz
- Department of Pathology, School of Medicine, Uludag University, Gorukle, Bursa, Turkey.
| | | | | | | |
Collapse
|
35
|
Hazar A, Uzunsoy D, Ekşioğlu H, Sen O, Demir H, Ömürlü V, Koyun A. M-13 Determination of Wear Behaviour of Titanium Alloys Implant Materials Blasted With Mixture of Zirconia/Silica/Hydroxyapatite Powders. J Biomech 2010. [DOI: 10.1016/s0021-9290(10)70122-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
36
|
Çelik B, Kefeli Çelik H, Hamzaçebi H, Demir H, Furtun K, Ortamevzi C. The Role of Meteorological Conditions on the Development of Spontaneous Pneumothorax. Thorac Cardiovasc Surg 2009; 57:409-12. [DOI: 10.1055/s-0029-1185721] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
37
|
Demir H, Tanriverdi F, Ozoğul N, Caliş M, Kirnap M, Durak AC, Keleştimur F. Evaluation of the hypothalamic–pituitary–adrenal axis in untreated patients with polymyalgia rheumatica and healthy controls. Scand J Rheumatol 2009; 35:217-23. [PMID: 16766369 DOI: 10.1080/03009740500474586] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVE To explore the hypothalamic-pituitary-adrenal (HPA) axis in polymyalgia rheumatica (PMR). SUBJECTS AND METHODS This study was carried out on 13 female patients with PMR who were diagnosed according to the criteria of Chuang et al (Ann Intern Med 1982;97:672-80) and 10 healthy female subjects in the Department of Physical Medicine and Rehabilitation, Erciyes University Medical School. In the patient and control groups, basal cortisol, adrenocorticotrophic hormone (ACTH), 17alpha-hydroxyprogesterone (17-OHP), 11-deoxycortisol (11-S), dehydroepiandrosterone sulfate (DHEAS), androstenedione (A), prolactin (PRL), and thyroid stimulating hormone (TSH) levels were measured. Cortisol, 17-OHP, 11-S and A responses after the low-dose (1 microg) ACTH stimulation test and cortisol and DHEAS responses after the dexamethasone suppression test were detected. We also measured acute phase reactants including C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR). RESULTS Age and sex characteristics were similar in both patient and control groups. The levels of basal hormones including cortisol, ACTH, 17-OHP, 11-S, DHEAS, A, prolactin and TSH and cortisol and DHEAS levels after the low-dose dexamethasone suppression test were not significantly different between the patient and control groups. However, cortisol/CRP and ACTH/CRP ratios were significantly lower in the patient group. Cortisol and DHEAS responses after the low-dose dexamethasone suppression test were not significantly different between the patient and control groups. Cortisol response after the 1 microg ACTH stimulation test was significantly lower in the patients than in the control group, but there were no significant differences in 17-OHP, 11-S and A responses between the patients and controls. Correlation analysis showed that there was a negative correlation between peak cortisol levels after the ACTH stimulation test and disease duration, and also a positive correlation between cortisol levels after the low-dose dexamethasone suppression test and acute phase reactants including CRP and ESR. CONCLUSION A significant low cortisol response to ACTH stimulation was detected in the patients with PMR. In addition, a negative correlation after the 1 microg ACTH stimulation test between peak cortisol levels and disease duration was detected. These findings may indicate hypoactivation in the HPA axis.
Collapse
Affiliation(s)
- H Demir
- Department of Physical Medicine and Rehabilitation, Erciyes University Medical School, Kayseri, Turkey.
| | | | | | | | | | | | | |
Collapse
|
38
|
Doherty D, Parisi MA, Finn LS, Gunay-Aygun M, Al-Mateen M, Bates D, Clericuzio C, Demir H, Dorschner M, van Essen AJ, Gahl WA, Gentile M, Gorden NT, Hikida A, Knutzen D, Ozyurek H, Phelps I, Rosenthal P, Verloes A, Weigand H, Chance PF, Dobyns WB, Glass IA. Mutations in 3 genes (MKS3, CC2D2A and RPGRIP1L) cause COACH syndrome (Joubert syndrome with congenital hepatic fibrosis). J Med Genet 2009; 47:8-21. [PMID: 19574260 DOI: 10.1136/jmg.2009.067249] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
OBJECTIVE To identify genetic causes of COACH syndrome BACKGROUND COACH syndrome is a rare autosomal recessive disorder characterised by Cerebellar vermis hypoplasia, Oligophrenia (developmental delay/mental retardation), Ataxia, Coloboma, and Hepatic fibrosis. The vermis hypoplasia falls in a spectrum of mid-hindbrain malformation called the molar tooth sign (MTS), making COACH a Joubert syndrome related disorder (JSRD). METHODS In a cohort of 251 families with JSRD, 26 subjects in 23 families met criteria for COACH syndrome, defined as JSRD plus clinically apparent liver disease. Diagnostic criteria for JSRD were clinical findings (intellectual impairment, hypotonia, ataxia) plus supportive brain imaging findings (MTS or cerebellar vermis hypoplasia). MKS3/TMEM67 was sequenced in all subjects for whom DNA was available. In COACH subjects without MKS3 mutations, CC2D2A, RPGRIP1L and CEP290 were also sequenced. RESULTS 19/23 families (83%) with COACH syndrome carried MKS3 mutations, compared to 2/209 (1%) with JSRD but no liver disease. Two other families with COACH carried CC2D2A mutations, one family carried RPGRIP1L mutations, and one lacked mutations in MKS3, CC2D2A, RPGRIP1L and CEP290. Liver biopsies from three subjects, each with mutations in one of the three genes, revealed changes within the congenital hepatic fibrosis/ductal plate malformation spectrum. In JSRD with and without liver disease, MKS3 mutations account for 21/232 families (9%). CONCLUSIONS Mutations in MKS3 are responsible for the majority of COACH syndrome, with minor contributions from CC2D2A and RPGRIP1L; therefore, MKS3 should be the first gene tested in patients with JSRD plus liver disease and/or coloboma, followed by CC2D2A and RPGRIP1L.
Collapse
Affiliation(s)
- D Doherty
- University of Washington, Seattle, WA 98195-0320, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Demir H, Topkaya BÇ, Erbay AR, Doğan M, Yücel D. Ischaemia-modified albumin elevation after percutaneous coronary intervention reflects albumin concentration rather than ischaemia. Ann Clin Biochem 2009; 46:327-31. [DOI: 10.1258/acb.2009.008238] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background Percutaneous coronary intervention (PCI) is accepted as a model of myocardial ischaemia in studies of ischaemia markers, especially of ischaemia-modified albumin (IMA). However, there is concern that IMA levels may reflect changes in albumin concentrations rather than myocardial ischaemia also during PCI. Methods Twenty-one consecutive patients (17 men and 4 women) undergoing single-vessel percutaneous coronary angioplasty were enrolled in the study. IMA and albumin levels were measured together with myoglobin, creatine kinase 2 and cardiac troponin I, before (Group 1), immediately after (Group 2) and 6 h after (Group 3) the procedure of PCI. Results The IMA levels of Group 2 were significantly higher than those of Group 1 and Group 3 ( P < 0.05 for both). However, correction of IMA by multiplying with the (individual albumin concentration of the patient/median albumin concentration of Group 1) ratio gave no statistical differences between the groups ( P > 0.05). There were strong negative correlations between IMA levels and albumin concentrations within individual groups ( r = −0.757, P < 0.001; r = −0.712, P < 0.001; and r = −0.705, P < 0.001 for Group 1, Group 2 and Group 3, respectively). Conclusion The results confirm the close dependency of IMA results on albumin concentrations. Therefore, IMA results reflect albumin concentrations rather than myocardial ischaemia also in PCI. This situation and lack of standard reference materials for the albumin cobalt binding assay can lessen the diagnostic performance of IMA.
Collapse
Affiliation(s)
- H Demir
- Department of Clinical Biochemistry, Ankara Training and Research Hospital
| | - B Ç Topkaya
- Department of Clinical Biochemistry, Ankara Training and Research Hospital
| | - A R Erbay
- Department of Cardiology, High Specialization Hospital, Ministry of Health, Ankara, Turkey
| | - M Doğan
- Department of Cardiology, High Specialization Hospital, Ministry of Health, Ankara, Turkey
| | - D Yücel
- Department of Clinical Biochemistry, Ankara Training and Research Hospital
| |
Collapse
|
40
|
|
41
|
Kolusari A, Adali E, Kurdoglu M, Yildizhan R, Cebi A, Edirne T, Demir H, Yoruk IH. Catalase activity, serum trace element and heavy metal concentrations, vitamin A, vitamin D and vitamin E levels in hydatidiform mole. CLIN EXP OBSTET GYN 2009; 36:102-104. [PMID: 19688952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
PURPOSE OF INVESTIGATION In this study we aimed to measure the activity of catalase, which is an antioxidant enzyme, the concentrations of some trace elements and heavy metals, and vitamin A, D and E levels in serum samples of patients with hydatidiform mole, normal pregnancies and healthy non pregnant women. METHODS Seventy-two women were enrolled in this study. Of these, 24 were healthy women in the first trimester of pregnancy (HP), 24 were healthy non-pregnant women (NP) and 24 were patients with complete hydatidiform mole (CHM). RESULTS Serum levels of catalase, Zn, Co, vitamin A, D and E were significantly lower in the CHM group when compared with the HP and NP groups (p < 0.001). Serum levels of Cu, Fe, and Cd were significantly higher in the CHM group when compared with the HP and NP groups (p < 0.001). CONCLUSION The assessment of oxidant/antioxidant imbalance in pregnant women could be useful in the early determination of molar pregnancy and supplementation with antioxidants may be useful in the treatment of CHM, and may prevent recurrent molar pregnancy.
Collapse
Affiliation(s)
- A Kolusari
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey.
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Kolusari A, Kurdoglu M, Yildizhan R, Adali E, Edirne T, Cebi A, Demir H, Yoruk IH. Catalase Activity, Serum Trace Element and Heavy Metal Concentrations, and Vitamin A, D and E Levels in Pre-Eclampsia. J Int Med Res 2008; 36:1335-41. [DOI: 10.1177/147323000803600622] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Catalase (antioxidant enzyme) activity in erythrocytes and serum levels of trace elements (copper, iron, zinc), heavy metals (cadmium, cobalt) and vitamins A (retinol), D (cholecalciferol) and E (α-tocopherol) were measured in 145 subjects comprising 47 pre-eclamptic pregnant women (PE), 48 healthy pregnant women (HP) and 50 healthy non-pregnant controls (NP). Catalase, vitamins A, D and E and levels of cobalt were significantly lower in the PE group compared with the HP and NP groups, whereas levels of copper, iron and cadmium were significantly higher in the PE group than in the HP and NP groups. Levels of zinc were significantly lower in both the PE and HP groups compared with the NP group. This assessment of oxidant/antioxidant imbalance in pregnant women could be useful in the early identification of pre-eclampsia and antioxidant supplementation in the early weeks of gestation might be useful.
Collapse
Affiliation(s)
- A Kolusari
- Department of Obstetrics and Gynaecology, Yuzuncu Yil University, Van, Turkey
| | - M Kurdoglu
- Department of Obstetrics and Gynaecology, Yuzuncu Yil University, Van, Turkey
| | - R Yildizhan
- Department of Obstetrics and Gynaecology, Yuzuncu Yil University, Van, Turkey
| | - E Adali
- Department of Obstetrics and Gynaecology, Yuzuncu Yil University, Van, Turkey
| | - T Edirne
- Department of Family Medicine, Yuzuncu Yil University, Van, Turkey
| | - A Cebi
- Department of Medical Biology, Faculty of Medicine, Yuzuncu Yil University, Van, Turkey
| | - H Demir
- Department of Chemistry, Faculty of Art and Science, Yuzuncu Yil University, Van, Turkey
| | - IH Yoruk
- Department of Chemistry, Faculty of Art and Science, Yuzuncu Yil University, Van, Turkey
| |
Collapse
|
43
|
Demir H, Tan YZ, Isgoren S, Gorur Daglioz G, Berk F. Annual congress of the EANM 2007, Copenhagen, Denmark Abstracts Tuesday. Eur J Nucl Med Mol Imaging 2008. [DOI: 10.1007/s00259-008-0791-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
44
|
Demir H, Top A, Balköse D, Ulkü S. Dye adsorption behavior of Luffa cylindrica fibers. J Hazard Mater 2008; 153:389-394. [PMID: 17919814 DOI: 10.1016/j.jhazmat.2007.08.070] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2007] [Revised: 07/18/2007] [Accepted: 08/27/2007] [Indexed: 05/25/2023]
Abstract
Using natural Luffa cylindrica fibers as adsorbent removal of methylene blue dye from aqueous solutions at different temperatures and dye concentrations was investigated in this study. Thermodynamics and kinetics of adsorption were also investigated. The adsorption isotherms could be well defined with Langmuir model instead of Freundlich model. The thermodynamic parameters of methylene blue (MB) adsorption indicated that the adsorption is exothermic and spontaneous. The average MB adsorption capacity was found out as 49 mg/g and average BET surface area of fibers was calculated as 123 m(2)/g.
Collapse
Affiliation(s)
- H Demir
- Izmir Institute of Technology, Faculty of Engineering, Department of Chemical Engineering, Gülbahce Campus, Urla Izmir, Turkey.
| | | | | | | |
Collapse
|
45
|
Affiliation(s)
- H. Demir
- Department of Biology, Faculty of Sciences and Arts, Gazi University, Ankara, Turkey
| | - O. Seyyar
- Department of Biology, Faculty of Sciences and Arts, Erciyes University, Niğde, Turkey
| | - M. Aktaş
- Department of Biology, Faculty of Sciences and Arts, Gazi University, Ankara, Turkey
| |
Collapse
|
46
|
Elmaz O, Cirit U, Demir H. Relationship of testicular development with age, body weight, semen characteristics and testosterone in Kivircik ram lambs. S AFR J ANIM SCI 2007. [DOI: 10.4314/sajas.v37i4.4100] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
47
|
|
48
|
Abstract
Pityriasis lichenoides is an uncommon, benign skin disorder with two major variants: acute and chronic. Autoimmune hepatitis comprises heterogeneous forms of chronic hepatitis that are generally progressive and often fluctuating. Two major forms of this entity are recognized. Herein, we report the concurrence of pityriasis lichenoides chronica with type I autoimmune hepatitis in a child, which, to the best of our knowledge, has not been previously reported. Although it is hard to say whether an etiologic relationship or coincidental coexistence occurred between the two entities in our patient, some common mechanisms may be involved in both diseases.
Collapse
Affiliation(s)
- Inci Nur Saltik-Temizel
- Department of Pediatrics, Section of Gastroenterology, Hepatology and Nutrition, Faculty of Medicine, Hacettepe University, 06100 Ankara, Turkey.
| | | | | | | |
Collapse
|
49
|
|
50
|
Abstract
Thoracic ectopic kidney with partial or complete renal protrusion above the level of the diaphragma into the posterior mediastinum is the rarest form of all ectopic kidneys with an incidence of less than 1 per 10,000 cases. We present a newborn with right congenital diaphragmatic hernia associated with thoracic ectopic kidney. The diagnosis of ectopia was made prior to surgery. Gerota's fascia of kidney was used to close the diaphragmatic defect. Since this renal anomaly is usually asymptomatic, it does not require any specific treatment. However, a close examination of function and anatomy of the kidney prior to surgery of hernia is important and beneficial. We discuss the embryological context and the importance of renal scintigraphy in patients with ectopic kidney.
Collapse
Affiliation(s)
- S Sözübir
- Department of Pediatric Surgery, School of Medicine, University of Kocaeli, 41900 Derine, Kocaeli, Turkey.
| | | | | | | |
Collapse
|