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Tutkun A, Ozagar A, Koç A, Batman C, Uneri C, Sehitoglu MA. Treatment of chronic ear disease. Topical ciprofloxacin vs topical gentamicin. ARCHIVES OF OTOLARYNGOLOGY--HEAD & NECK SURGERY 1995; 121:1414-6. [PMID: 7488373 DOI: 10.1001/archotol.1995.01890120070014] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
OBJECTIVE To determine and compare the therapeutic efficiency of ciprofloxacin hydrochloride and gentamicin sulfate in the treatment of chronic ear disease. DESIGN Prospective randomized study. SETTING Academic tertiary medical center. PATIENTS Consecutive referred sample of 44 patients with chronic suppurative otitis media randomized into two groups. INTERVENTIONS Ciprofloxacin hydrochloride (200 mg/mL) was administered to the first group (composed of 24 patients), while the second group (composed of 20 patients) received gentamicin sulfate (5 mg/mL) locally, five drops three times a day for 10 days. RESULTS In the ciprofloxacin group, 21 (88%) of the 24 patients with suppurative chronic otitis media were cured. On the other hand, only six (30%) of the patients in the gentamicin group were cured. The rest of the patients showed no clinical or bacteriological improvement. CONCLUSIONS To our knowledge, this is the first study to compare the efficiency of two topical otic preparations in the treatment of chronic ear disease. The results show that topical ciprofloxacin preparation is more efficacious and efficient than topical gentamicin for the treatment of chronic otitis media in the acute stage.
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Clinical Trial |
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35 |
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Yetgin S, Tunç B, Koç A, Toksoy HB, Ceyhan M, Kanra G. Two booster dose hepatitis B virus vaccination in patients with leukemia. Leuk Res 2001; 25:647-9. [PMID: 11397468 DOI: 10.1016/s0145-2126(00)00101-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The aim of this study was to interpret the antibody response to hepatitis B (HB) vaccination following a two booster dose schedule in 94 acute lymphoblastic leukemia (ALL) patients. All patients were between 1-16 years of age with negative hepatitis B virus (HBV) serology and normal hepatic function. Fifty patients were vaccinated with Engerix B vaccine, and 44 patients were vaccinated with GenHevac B vaccine, with a schedule of 0, 1, 6 and 0, 1, 2, as well as booster doses, in 12 and 6 months respectively. A second booster was given as a fifth dose to 16 unresponsive patients in each vaccine group, 3 and 6 months after the first booster for Engerix B and GenHevac B vaccines respectively. Dosage was 20 microg HbsAg for all patients. Seroconversion rates with protective level antibody were 35.1% (n=33/94). The figures were 32.1% (n=16/50) and 38.6% (n=17/44) for Engerix B and GenHevac B vaccines, respectively. Seroconversion rate in patients younger than 10 years old was found to be higher (39.11%) than older patients (24%), but this was not statistically significant. This study indicates that one third of the leukemic children undergoing maintenence chemotherapy responded to HB vaccine with protective titers of anti-HBs. We recommend HB vaccination especially in developing countries.
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28 |
3
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Hiçsönmez G, Cetin M, Yenicesu I, Olcay L, Koç A, Aktaş D, Tunçbilek E, Tuncer M. Evaluation of children with myelodysplastic syndrome: importance of extramedullary disease as a presenting symptom. Leuk Lymphoma 2001; 42:665-74. [PMID: 11697496 DOI: 10.3109/10428190109099328] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Thirty-three children diagnosed with primary myelodysplastic syndrome (MDS) in a single institution over an 8 year period were evaluated with special emphasis on children who presented with extramedullary disease (EMD). EMD was present at diagnosis in 12 (36%) of the 33 children with MDS. Three patients with juvenile myelomonocytic leukemia (JMML) and 2 patients with chronic myelomonocytic leukemia (CMML) presented with pleural effusion. Pericardial effusion was present in 3 of these patients, two of whom also had thrombosis. Pyoderma gangrenosum, relapsing polychondritis were the initial findings in another two cases with JMML. Lymphadenopathy (n=1), gingival hypertrophy (n=2), orbital granulocytic sarcoma (n=1) and spinal mass (n=1) were the presenting findings in 5 patients with refractory anemia with excess of blasts in transformation. Since high-dose methylprednisolone (HDMP, 20-30 mg/kg/day) has been shown to induce differentiation and apoptosis of myeloid leukemic cells in children with different morphological subtypes of acute myeloid leukemia in vivo and in vitro, 25 children with de novo MDS were treated with combined HDMP and cytotoxic chemotherapy. Dramatic improvement of EMD and decrease in blast cells both in the peripheral blood and bone marrow were obtained following administration of short-course HDMP treatment alone as observed in children with AML. HDMP, combined with low-dose cytosine arabinoside and mitoxantrone were used for the remission induction. Remission was achieved in 8 (80%) of 10 children who presented with EMD and in 9 (60%) of 15 children without EMD. Long-term remission (>6 years) was obtained in 4 (two with JMML and two with CMML), three of whom presented with EMD. In conclusion EMD can be a presenting finding in childhood MDS as observed in adults. In addition, the beneficial effect of HDMP combined with more intensive chemotherapy should be explored as alternative therapy in children with MDS not suitable for bone marrow transplantation.
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4
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Yetgin S, Tuncer MA, Cetin M, Gümrük F, Yenicesu I, Tunç B, Oner AF, Toksoy H, Koç A, Aslan D, Ozyürek E, Olcay L, Atahan L, Tunçbilek E, Gürgey A. Benefit of high-dose methylprednisolone in comparison with conventional-dose prednisolone during remission induction therapy in childhood acute lymphoblastic leukemia for long-term follow-up. Leukemia 2003; 17:328-33. [PMID: 12592331 DOI: 10.1038/sj.leu.2402673] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2001] [Accepted: 05/29/2002] [Indexed: 11/08/2022]
Abstract
Eight-year event-free survival (EFS) was evaluated in 205 patients with acute lymphoblastic leukemia (ALL), to consider the efficacy of high-dose methylprednisolone (HDMP) given during remission induction chemotherapy between 1 and 29 days. The St Jude Total XI Study protocol was used after some minor modifications in this trial. Patients were randomized into two groups. Group A (n = 108) received conventional dose (60 mg/m(2)/day orally) prednisolone and group B (n = 97) received HDMP (Prednol-L, 900-600 mg/m(2) orally) during remission induction chemotherapy. Complete remission was obtained in 95% of the 205 patients who were followed-up for 11 years; median follow-up was 72 months (range 60-129) and 8-year EFS rate was 60% overall (53% in group A, 66% in group B). The EFS rate of group B was significantly higher than of group A (P = 0.05). The 8-year EFS rate of groups A and B in the high-risk groups was 39% vs 63% (P = 0.002). When we compared 8-year EFS rate in groups A and B in the high-risk subgroup for both ages together </=2 or >/=10 years, it was 44% vs 74%, respectively. Among patients in the high-risk subgroup with a WBC count >/=50 x 10(9)/l, the 8-year EFS was 38% in group A vs58% in group B. During the 11-year follow-up period, a total of 64 relapses occurred in 205 patients. In group A relapses were higher (39%) than in group B (23%) (P = 0.05). These results suggest that HDMP during remission-induction chemotherapy improves the EFS rate significantly for high-risk patients in terms of the chances of cure.
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Clinical Trial |
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Ozkiris A, Erkiliç K, Koç A, Mistik S. Effect of atorvastatin on ocular blood flow velocities in patients with diabetic retinopathy. Br J Ophthalmol 2007; 91:69-73. [PMID: 16973667 PMCID: PMC1857585 DOI: 10.1136/bjo.2006.098285] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/06/2006] [Indexed: 01/02/2023]
Abstract
AIM To investigate blood flow velocities in the ophthalmic and central retinal arteries (CRAs) in patients with diabetic retinopathy before and after atorvastatin treatment. METHODS 45 patients with type 2 diabetes were included in this double-blind, placebo-controlled study. The patients with diabetes were divided into three subgroups: group 1 (n = 15) included patients with non-proliferative diabetic retinopathy (NPDR); group 2 (n = 15) had patients with proliferative diabetic retinopathy (PDR); and group 3 (n = 15; placebo group) included 8 patients with NPDR and 7 patients with PDR. The patients in groups 1 and 2 (atorvastatin group) received 10 mg atorvastatin daily for 10 weeks. Pre-treatment and post-treatment serum levels of total cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol and triglyceride were recorded before and after treatment. Ocular blood flow velocities of the ophthalmic artery and CRA were evaluated by colour Doppler imaging before and after treatment in each group. RESULTS The baseline haemodynamic parameters were similar between atorvastatin and placebo groups (p>0.05 for both). Atorvastatin significantly decreased serum levels of total cholesterol, low-density lipoprotein cholesterol and triglycerides in groups 1 and 2 compared with pretreatment levels (p<0.001 for both). The mean peak systolic flow velocities (PSVs) of the ophthalmic artery in group 2, and the mean PSV and resistive indices of the CRA in groups 1 and 2 decreased significantly after atorvastatin treatment (p<0.05 for both), whereas the mean end diastolic flow velocity of the ophthalmic artery and CRA did not change (p>0.05). There was no significant difference in ocular blood flow velocities in the placebo group (p>0.05). CONCLUSION Atorvastatin may have a role in reducing diabetic retinal complications, with improvement in vascular resistance and decrease in the mean PSVs of the ophthalmic artery and CRA. However, further studies with large numbers of patients are needed to obtain the long-term results of this drug.
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Randomized Controlled Trial |
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Ozagar A, Koç A, Ciprut A, Tutkun A, Akdaş F, Sehitoğlu MA. Effects of topical otic preparations on hearing in chronic otitis media. Otolaryngol Head Neck Surg 1997; 117:405-8. [PMID: 9339804 DOI: 10.1016/s0194-5998(97)70134-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Most of the topical otic preparations have been shown to cause ototoxicity. In this study ciprofloxacin hydrochloride, a relatively new topical agent, and gentamicin sulfate were studied in two groups of 20 patients with chronic otitis media. Patients were randomly selected to receive either ciprofloxacin (200 microg/ml) or gentamicin sulfate (5 mg/ml) locally, five drops three times a day for 10 days. Clinical response was seen in 20 of 20 patients in the ciprofloxacin group compared with 6 of 20 patients in the gentamicin group. Audiometric evaluation revealed no significant ototoxic effect in either group. In fact, hearing thresholds were slightly better than pretreatment levels in both groups.
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Clinical Trial |
28 |
19 |
7
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Aykin-Dinçer E, Koç A, Erbas M. Extraction and physicochemical characterization of broiler (Gallus gallus domesticus) skin gelatin compared to commercial bovine gelatin. Poult Sci 2018; 96:4124-4131. [PMID: 29050430 DOI: 10.3382/ps/pex237] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 08/09/2017] [Indexed: 11/20/2022] Open
Abstract
Gelatin was extracted from broiler (Gallus gallus domesticus) skins and analyzed to compare its physicochemical properties with those of commercial bovine gelatin. The average yield of broiler skin gelatin was 6.5% on a wet weight basis. Broiler skin gelatin had more α1-and α2-chains than β-chain and contained high molecular weight (γ-chain) polymers. Glycine was the dominant amino acid in broiler skin gelatin (20.26%), followed by proline (Pro) (15.12%) then hydroxyproline (Hyp) (11.36%). Compared to commercial bovine gelatin, broiler skin gelatin had less total imino acids (Pro and Hyp) but a higher (33.65 vs. 31.38°C) melting temperature (P < 0.01). The differences in physical properties between the broiler and commercial bovine gelatins appeared to be associated with differences in their amino acid composition and molecular weight distribution. The sensory evaluation results revealed that broiler skin gelatin could be a potential alternative to commercial bovine gelatin, useful in various food products.
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Journal Article |
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18 |
8
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Yetgin S, Olcay L, Koç A, Germeshausen M. Transformation of severe congenital neutropenia to early acute lymphoblastic leukemia in a patient with HAX1 mutation and without G-CSF administration or receptor mutation. Leukemia 2008; 22:1797. [PMID: 18354489 DOI: 10.1038/leu.2008.64] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Letter |
17 |
11 |
9
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Yetgin S, Germeshausen M, Touw I, Koç A, Olcay L. Acute lymphoblastic leukemia in a patient with congenital neutropenia without G-CSF-R and ELA2 mutations. Leukemia 2005; 19:1710-1. [PMID: 15973448 DOI: 10.1038/sj.leu.2403850] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Ekin A, Gezer C, Taner CE, Ozeren M, Ozer O, Koç A, Gezer NS. Chromosomal and structural anomalies in fetuses with open neural tube defects. J OBSTET GYNAECOL 2014; 34:156-9. [DOI: 10.3109/01443615.2013.834307] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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11
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Koç A, Kizilkaya K. Some factors influencing milk somatic cell count of Holstein Friesian and Brown Swiss cows under the Mediterranean climatic conditions. Arch Anim Breed 2009. [DOI: 10.5194/aab-52-124-2009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. The aim of this study was to determine the influencing factors on somatic cell count (SCC) in the milk of Holstein Friesian (HF) and Brown Swiss (BS) cows raised on three dairy farms under the Mediterranean climatic conditions in Turkey. For a two-year period, farms were visited monthly to measure daily milk yield (DMY) and collect milk samples from each cow during the morning and evening milking. Total of 1 429 SCC readings from 67 HF and 16 BS cows were analyzed by using repeated measures. Breed (P<0.01), lactation number (LN) (P<0.01), milking time (MT) (P<0.05), lactation month (LM) (P<0.01) and the interactions of breed-LM (P<0.05), herd-LM (P<0.01) and LN-LM (P<0.01) effects on SCC were statistically significant as did the co-variable DMY effect (P<0.01). The effect of herd and herd-MT interactions on SCC were statistically insignificant (P>0.05). The SCC means for BS and HF cows were 5.464±0.060 (291 072 cells/ml) and 5.654±0.029 (450 817 cells/ml), respectively. The SCC mean for morning milking (338 065 cells/ml) was 25 850 cells/ml lower than that of evening milking. The LN4 had the highest SCC mean (490 908 cells/ml) and was statistically different from those of LN1 (P<0.01) and LN2 (P<0.05). The SCC level was the highest in the first LM (601 174 cells/ml) and this level then decreased in the later months. Possible reasons for the difference in SCC means between the breeds are different resistance mechanisms against mastitis, different morphological conformations of udders and different milk yields between these two breeds. The insignificant differences found among herds show the similarities of management, milking hygiene and barn conditions. In order to decrease SCC in milk and increase udder health, some precautions need to be taken like improving milking management, hygiene and barn conditions, milking the cow at uniform intervals, feeding the cows after the milking and applying a mastitis control program.
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Koç A, Oner R, Oner C, Aktas D, Sözen M, Tunçbilek E, Altay C. Myelodysplastic syndrome (MDS) associated with increased hemoglobin F and trisomy 8: presentation of a patient. HEMATOLOGY AND CELL THERAPY 1999; 41:187-9. [PMID: 10543376 DOI: 10.1007/s00282-999-0187-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A 7.5 year old boy with myelodysplastic syndrome (MDS) of CMML type associated with trisomy 8 and elevated hemoglobin F (Hb F) value is presented. Hematological evaluation of the patient revealed that the Hb was 10 g/dl, MCV 110 FL, platelets 58 X 10(9)/l, WBC 5.4 X 10(9)/l with 24% atypical monocytes. Karyotype analysis revealed 47, XY, +8. Hb F value was 21% which was distributed heterogeneously among red cells. PCR amplified cDNA copies of circulating reticulocyte mRNA were used to measure the relative amounts of alpha-, beta-, and gamma- globin. There was marked increases in both alpha/beta mRNA ratio (20%) and gamma/(gamma+beta) mRNA ratio (35%) in the patient compared to normal subjects. The study indicated that increased transcription of alpha and gamma genes are partly responsible for the elevation of Hb F in MDS.
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Case Reports |
26 |
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Atabekoğlu CS, Türkçüoğlu I, Duru B, Sönmezer M, Süer G, Uysalel A, Koç A, Söylemez F. Closure vs non-closure of peritoneum at caesarean section: evaluation of pain. J OBSTET GYNAECOL 2011; 31:307-10. [PMID: 21534751 DOI: 10.3109/01443615.2011.560302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We evaluated the effect of closure or non-closure of parietal and visceral peritoneum during caesarean section (CS) on post-caesarean pain and analgesic requirement. A total of 94 primigravidas planned for elective CS were prospectively enrolled into closure (n = 46) and non-closure (n = 48) groups. Analgesia was provided by a patient-controlled analgesia pump (PCA) postoperatively. Pain was evaluated using a visual analogue scale (VAS) and verbal rating scale (VRS). Total dose of analgesics administered through PCA and times of analgesia demand and additional analgesics were also assessed. VAS and VRS scores were similar between the groups. The total dose of analgesics administered were similar (p = 0.095) between groups, however the mean number of analgesic demand (p = 0.020) and the additional analgesics (p < 0.001) were higher in the closure group. As a conclusion, the closure or non-closure of the peritoneum does not have any impact on postoperative pain intensity, however the analgesia demand and additional analgesia requirement decreases with non-closure.
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Comparative Study |
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14
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Koç A, Kavut İ, Uğur M. Evaluation of trabecular bone microstructure of mandibular condyle in edentulous, unilateral edentulous and fully dentate patients using cone-beam computed tomography. Folia Morphol (Warsz) 2019; 79:829-834. [PMID: 31802471 DOI: 10.5603/fm.a2019.0133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/16/2019] [Accepted: 11/22/2019] [Indexed: 11/25/2022]
Abstract
BACKGROUND The aim of this study was to compare the trabecular bone microstructure of the mandibular condyle in edentulous, unilateral edentulous (Kennedy Class II), and fully dentate patients. MATERIALS AND METHODS The study used the cone-beam computed tomography (CBCT) images of 17 fully dentate (34 condyles), 16 edentulous (32 condyles), and 17 unilateral edentulous patients (34 condyles) aged 19 to 80 years. The trabecular bone microstructure of the mandibular condyle was evaluated on 8 consecutive cross-sectional images of these patients. In the microstructure analysis, structural model index (SMI), ellipsoid factor (EF), bone volume fraction (BV/TV), trabecular thickness (Tb.Th) and trabecular seperation (Tb.Sp) were measured. RESULTS There was no significant difference between the mean SMI, BV/TV, EF and Tb.Th microstructure values of each group (p = 0.243, p = 0.095, p = 0.962, p = 0.095, respectively). However, there was significant difference in terms of mean Tb.Sp between the groups (p = 0.021). The trabecular structure in all three groups was more rod-shaped. No correlation was found between age factor and microstructure values. CONCLUSIONS Considering the in vivo microstructure analysis of CBCT images, it can be said that teeth loss does not have a significant effect on the microstructure parameters excluding Tb.Sp of mandible condyles and does not affect mandibular condyle trabecular endurance.
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Seval MM, Karabulut HG, Tükün A, Koç A. Cell free fetal DNA in the plasma of pregnant women with preeclampsia. CLIN EXP OBSTET GYN 2015; 42:787-791. [PMID: 26753487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Insufficient cytotrophoblast invasion to the myometrium is associated with preeclampsia, especially with the early-onset preeclampsia (before 34 gestational weeks). Several investigations have marked changes in the concentration of cell free fetal DNA in the maternal circulation of women with preeclampsia. However, these studies were not performed for early or late preeclampsia subgroups individually. The present authors planned to determine the levels of the cell free both fetal and maternal DNA in the maternal circulation in early preeclampsia subgroup and compare it with normotensive control cohort. MATERIALS AND METHODS A total of 16 women; eight of these with preeclampsia and eight normotensive control cohorts with singleton male pregnancy between 28 and 32 gestational weeks were included in the study. Real-time PCR analysis was performed for determining the circulating cell free DNA levels. RESULTS Cell free fetal DNA concentrations were higher in early preeclamptic women than control subjects. The authors found no statistically significant difference in each levels of maternal and total DNA between hypertensive and normotensive groups. CONCLUSIONS The present findings suggest that the levels of cell free fetal DNA in maternal circulation were higher in pregnancies which are complicated with early preeclampsia than normotensive controls.
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Ndihokubwayo F, Koç A. Breeding pure and crossbreeds of European cattle breeds for milk production improvement under tropical climate conditions—a review. Trop Anim Health Prod 2024; 56:23. [DOI: https:/doi.org/10.1007/s11250-023-03868-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 12/07/2023] [Indexed: 12/23/2023]
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Koç A, Kösecik M, Tatli MM, Ataş A, Emiroğlu HH. Juvenile rheumatoid arthritis presented with thrombocytopenia. Turk J Pediatr 2000; 42:162-4. [PMID: 10936986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Leukopenia and thrombocytopenia are rare findings in systemic onset juvenile rheumatoid arthritis (S-JRA), and if present, bone marrow (BM) examination is necessary to exclude malignant diseases. We report here a 13.5-year-old boy with S-JRA who had severe thrombocytopenia and mild leukopenia, without arthritis, at the onset of the disease. BM was hypercellular with increased numbers of myeloid precursors and megakaryocytes. After treatment with acetylsalicylic acid, leukocyte and platelet counts returned to normal levels, and after two months chronic arthritis developed.
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Case Reports |
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18
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Koç A, Kösecik M, Vural H, Erel O, Ataş A, Tatli MM. The frequency and etiology of anemia among children 6-16 years of age in the southeast region of Turkey. Turk J Pediatr 2000; 42:91-5. [PMID: 10936971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The frequency and etiology of anemia were investigated in 2,913 children between six and 16 years of age in Sanliurfa, in the southeast region of Turkey. Anemia was found in 142 (7.8%) children in the 6-11 years of age group, and in 16 (1.5%) in the 12-16 years of age group; in total, in 158 (5.4%) children. Causes were iron deficiency in 93 (58.9%) children, beta-thalassemia heterozygosity in 10 (6.3%) children, chronic disease that causes anemia of inflammation in 30 (19.0%) children, and intestinal parasitic infections in 17 (10.8%) children. In eight (5.1%) children, the cause of anemia could not be determined. The study's results showed that iron deficiency anemia and chronic and parasitic disease are important problems in schoolchildren of Sanliurfa, while beta-thalassemia and hemoglobinopathies have less importance.
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19
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Koç A, Bulca S, Çağlı A, Beyzi SB, Faye B, Konuspayeva G, Çınar MU. Effect of Changes in Farm Management on the Yield and Constituents, Microbiological Quality, Somatic Cell Count and Fatty Acid Profile of the Camel Milk. Vet Med Sci 2025; 11:e70158. [PMID: 40095780 PMCID: PMC11911932 DOI: 10.1002/vms3.70158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2024] [Revised: 11/26/2024] [Accepted: 11/29/2024] [Indexed: 03/19/2025] Open
Abstract
BACKGROUND The increasing interest in camel milk (CM) worldwide in recent years has increased the need for studies on the properties of CM, which is relatively less studied than other species. OBJECTIVE The objective of this study was to determine the effects of changes in farm management on daily milk yield (DMY), milk composition and microbiological quality of CM. METHODS Yearly changes in milk fat (MFC), protein (MPC), ash (MAC), totals solid (TSC) contents, total bacteria (TBC), coliform (CC), yeast and mould (YMC), somatic cell (SCC) counts and fatty acid profile of CM were determined by monthly taken milk samples and analyses. RESULTS The means of DMY, MFC, MPC, MAC, TSC, TBC, CC, YMC and SCC of milk were 3.53 ± 0.290 kg, 3.80% ± 0.285%, 4.36% ± 0.212%, 0.81% ± 0.013%, 11.95% ± 0.380%, 7.24 × 105 cfu/mL, 1.31 × 105 cfu/mL, 912 cfu/mL and 2.45 × 105 cells/mL, respectively. The effect of the changes (Year 2 vs. Year 1) was statistically significant for MFC, MPC, TSC and Log10TBC (p < 0.05), and significant effects of lactation stage were determined for DMY, MFC, MAC, TSC, Log10TBC and Log10YMC (p < 0.05). The highest fatty acid (FA) amount in CM was found for palmitic (C16:0), oleic (C18:1n9c), stearic (C18:0), myristic (C14:0) and palmitoleic (C16:1) acids with the concentrations of 31.59% ± 0.45%, 21.88% ± 0.81%, 13.43% ± 0.67%, 12.22% ± 0.26% and 12.18% ± 0.34% of fat, respectively. The correlation coefficients of MFC, MPC and TSC with SCFA and MCFA were moderate and negative but with long chain Fas (LCFA) were positive and moderate. Log10SCC was also negatively correlated with total polyunsaturated FAs (PUFA) (-0.414; p < 0.05), SCFA (-0.475; p < 0.01), MCFA (-0.573; p < 0.01) and positively correlated with LCFA (0.588; p < 0.01). CONCLUSION Although management causes significant changes in composition, TBC and FA profile, CM has high UFA, low SCFA, high LCFA and better atherogenic index (AI). The high microbiological level at the beginning and middle of lactation and the negative correlation of these traits with milk components reveal that various measures should be taken to improve hygienic conditions to process CM into quality products.
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Onal S, Kazokoglu H, Koç A, Akman M, Bavbek T, Direskeneli H, Yavuz S. Low dose and dose escalating therapy of interferon alfa-2a in the treatment of refractory and sight-threatening Behçet's uveitis. Clin Exp Rheumatol 2009; 27:S113-S114. [PMID: 19796551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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Clinical Trial |
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Ndihokubwayo F, Koç A. Breeding pure and crossbreeds of European cattle breeds for milk production improvement under tropical climate conditions-a review. Trop Anim Health Prod 2023; 56:23. [PMID: 38127200 DOI: 10.1007/s11250-023-03868-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 12/07/2023] [Indexed: 12/23/2023]
Abstract
The aim of this review was to present the breeding status of pure or crossbreeds of European cattle with African indigenous cattle in order to improve milk yield in African tropical conditions. As the African indigenous breeds are characterized by small size, low body weight (300-450 kg) and low production performances (less than 1000 kg per lactation), short lactation length (205-240 days), etc., the crossbreeding with pure European cattle was done in order to ameliorate production performances especially milk and beef production. As results, it was seen that F1 offspring improved output productions than their parents of tropical origin. Also, it was seen that F1 offspring showed disease and heat resistance than their parents of temperate climate origin. However, at different degrees of crossbreeding, it was seen that the offspring can demonstrate bad production performances than their parents and therefore, the crossbreeding has to respect a certain degree. Other consequences are that the crossbreeding of local and pure European cattle breeds has resulted in calving complications in African local cattle. In African indigenous cattle, the selection as an improvement tool was given less emphasis as a solution to improve output production. That is why, the implementation of a well-prepared selection programs could be practiced in African indigenous cattle in order to preserve African cattle genotypes, as they are endangered of extinction due to various crossbreeding with exotic cattle breeds.
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Review |
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Koç A, Kaya OO. Asn680ser polymorphism of the follicle-stimulating hormone receptor gene (FSHR) is not associated with recurrent pregnancy loss (RPL). GENETIC COUNSELING (GENEVA, SWITZERLAND) 2014; 25:337-339. [PMID: 25365857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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Letter |
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Koç A, Guney I, Kızılarslanoglu M, Gonulalan G, Deniz C, Saçkan F, Ergül F, Sözen M. EVALUATION OF THE ASSOCIATION OF PLASMA PENTRAXIN-3 LEVELS WITH CAROTID INTIMA-MEDIA THICKNESS AND HIGH-SENSITIVE CRP IN PATIENTS WITH SUBCLINICAL HYPOTHYROIDISM. ACTA ENDOCRINOLOGICA (BUCHAREST, ROMANIA : 2005) 2023; 19:286-291. [PMID: 38356983 PMCID: PMC10863954 DOI: 10.4183/aeb.2023.286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Context Inflammation-related markers may predict cardiovascular diseases. Objective In this study, it was aimed to assess pentraxin-3 (PTX-3) levels and its relationship with carotid intima-media thickness (CIMT) and high-sensitive C-reactive protein (hsCRP) in patients with subclinical hypothyroidism. Design Prospective cross-sectional study. Methods This study included 60 patients (aged 30-60 years) with subclinical hypothyroidism and 30 healthy volunteers as controls. The demographic characteristics and anthropometric measurements were performed in all patients and controls. In addition, sonographic carotid artery examination, thyroid functional tests, lipid profile, hsCRP, and PTX-3 levels of the participants were investigated. Results The PTX-3, hsCRP levels and CIMT were higher in patients with subclinical hypothyroidism when compared to controls (p=0.008, p=0.001, p<0.001, respectively). The PTX-3 level was strongly correlated with hsCRP (r=0.865; p<0.001), but no such correlation was detected with CIMT (r=-0.255; p=0.50). In binominal logistic regression analysis, it was found that CIMT and serum uric acid levels were independent parameters associated with subclinical hypothyroidism. In ROC analysis, a cut-off value of >3.75 ng/mL for serum PTX-3 level predicted subclinical hypothyroidism with a sensitivity of 60% and specificity of 60.7% (AUC: 0.672, p=0.004). Conclusion Showing inflammation and endothelial dysfunction, the PTX-3 may be a helpful marker in patients with subclinical hypothyroidism associated with increased risk for cardiovascular disease.
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research-article |
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Korkmaz K, Düzova H, Çetin Taşlidere A, Koç A, Karaca Z, Durmuş K. Effect of high-intensity exercise on endoplasmic reticulum stress and proinflammatory cytokine levels. Sci Sports 2023. [DOI: 10.1016/j.scispo.2022.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Tanbek K, Yilmaz U, Gul S, Koç A, Gul M, Sandal S. Effects of glucagon as a neurohormone on the central nervous system and glucose homeostasis. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2024; 28:163-179. [PMID: 38235868 DOI: 10.26355/eurrev_202401_34902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
OBJECTIVE This study aimed to elucidate the possible effects of the acute/long-term infusion of glucagon in the brain as the regulatory role on the endocrine secretions of the pancreas. MATERIALS AND METHODS Ninety male Wistar albino rats were divided as Control, artificial Cerebrospinal Fluid (aCSF) (120 min), Glucagon (120 min), pancreatic denervation (PD)+aCSF (120 min), PD+Glucagon (120 min), aCSF (7 days), Glucagon (7 days), PD+aCSF (7 days) and PD+Glucagon (7 days). Glucagon and solvent (aCSF) were administered after pancreatic denervation (PD) by Hamilton syringe and osmotic mini pump (1 µg/10 µl/min) in the third ventricle of the brain. RESULTS Acute intracerebroventricular (icv) administration of glucagon resulted in an elevation of glucagon levels and a concurrent reduction in blood glucose levels. Furthermore, in both the PD+aCSF (7 days) and PD+Glucagon (7 days) groups, there was a notable decrease in propiomelanocortin (POMC) and agouti-related protein (AgRP). Significant changes were observed in feed consumption and body weight, as well as pancreatic glucagon levels, with a simultaneous decrease in insulin levels in the PD (7 days), Glucagon (7 days), and PD+Glucagon (7 days) groups. These alterations were statistically significant when compared to the control group (p<0.05). CONCLUSIONS The research outcomes established that pancreas-secreted glucagon functions as a neurohormone within the brain, activating central pathways linked to blood glucose regulation. The presence of glucagon led to a decrease in POMC levels. Surprisingly, this reduction in POMC resulted in the suppression of AgRP. Contrary to expectations, the suppression of AgRP led to an increase in food intake rather than a decrease. As already highlighted in the results section, it was emphasized that POMC may play a more significant role than AgRP in influencing feeding behavior.
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