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Permanent URI for this collectionhttps://hdl.handle.net/11443/932

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Author: search.filters.author.Otlu, Baris

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    Six-year distribution pattern of hepatitis C virus in Turkey: a multicentre study
    (TAYLOR \& FRANCIS LTD, 2016-01-01) Altindis, Mustafa; Dal, Tuba; Akyar, Isin; Karatuna, Onur; Gokahmetoglu, Selma; Ulger, Seda Tezcan; Kulah, Canan; Uzun, Berrin; Sener, Asli Gamze; Ozdemir, Mehmet; Aydogan, Sibel; Kuskucu, Mert Ahmet; Midilli, Kenan; Otlu, Baris; Celen, Mustafa Kemal; Buruk, Kurtulus; Guducuoglu, Huseyin
    Hepatitis C infection is a public health problem. The aim of this retrospective study was to determine the distribution of hepatitis C virus (HCV) genotypes in seven regions of Turkey, by evaluating 7002 patients with chronic HCV in a six-year period. During the 2009-2014 period, serum/plasma samples from 7002 new consecutive HCV RNA positive patients were collected. The female patients were 3867 (55.2\%). The genotype distribution of HCV patiens was evaluated by ages and years. Statistical analysis was performed by using the Mann-Whitney test and the chi(2) analysis. During the six-year period, genotype 1b was the most common genotype (67.7\%) followed by untypeable genotype 1 (7.7\%), genotype 4 (7.3\%) and genotype 3 (6.7\%). In 2014, genotype 3 was the second most common one (11.3\%) and genotype 4 was the third most common one (9.8\%). In the group with <25 years old patients, genotype 1b was most common (78.48\%, 62/79) between the years of 2009 and 2011, whereas genotype 3 (34.8\%, 86/247), between the years of 2012 and 2014. Genotype 1b was the most common in the groups between 26 and 35 years, 36 and 45 years, 46 and 55 years, 56 and 65 years. The rate of genotype 3 was increased from 4.78\% to 10.06\% and the rate of genotype 4 was increased from 1.3\% to 3.84\%, from 2009-2011 to 2012-2014. In recent years, genotypes 3 and 4 have gained importance. New therapeutic strategies and survey studies may be required for the modified HCV genotype pattern.
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    DHEA supplementation improves endometrial HOXA-10 mRNA expression in poor responders
    (GALENOS YAYINCILIK, 2017-01-01) Celik, Onder; Acet, Mustafa; Imren, Aytac; Celik, Nilufer; Ersahin, Aynur; Aktun, Lebriz Hale; Otlu, Baris; Celik, Sudenaz; Caliskan, Eray; Unlu, Cihat
    Objective: The study was planned to investigate whether DHEA supplementation had an impact on endometrial receptivity in women who were poor responders (POR). Material and Methods: Twenty-eight POR women who were undergoing hysteroscopy and five fertile control subjects were included. The POR women were equally subdivided into two separate groups as patients who were currently using DHEA and those who were not. Endometrial samples of the subjects were obtained during hysteroscopy at the late follicular phase. Expression levels of endometrial HOXA-10, HOXA-11, and LIF mRNA were measured with the using real-time polymerase chain reaction. Spontaneous clinical pregnancy rates were also noted. Results: Compared with POR women who were not given DHEA, upregulated endometrial HOXA-10 (7.33-fold) and HOXA-11 (2.39-fold) mRNA expression were detected in POR women on DHEA. The increase in HOXA-10 mRNA was significant (p<0.03). The fold increase in HOXA-11 mRNA was found as 2.39, which indicated a positive upregulation. However, this fold increment was insignificant (p<0.45). An insignificant increase in spontaneous clinical pregnancy rates in POR women on DHEA (53.3\%) was observed compared with POR women who were not given DHEA (43.8\%). Conclusion: Oral DHEA supplementation in POR upregulates endometrial HOXA-10 mRNA expression, which is known to positively modulate endometrial receptivity.
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    Laparoscopic endometrioma resection increases peri-implantation endometrial HOXA-10 and HOXA-11 mRNA expression
    (ELSEVIER SCIENCE INC, 2015-01-01) Celik, Onder; Unlu, Cihat; Otlu, Baris; Celik, Nilufer; Caliskan, Eray
    Objective: To determine whether laparoscopic endometrioma resection alters peri-implantation endometrial HOXA-10, HOXA-11, LIF, ITGB3 and ITGAV mRNA expression. Design: Case-control study. Setting: Medical school. Patient(s): Twenty infertile patients with uni-or bilateral endometrioma, five infertile patients having nonendometriotic benign ovarian cyst, and five fertile control subjects. Intervention(s): Mid-luteal-phase endometrial sampling was performed at the time of surgery. Second endometrial biopsies were obtained 3 months after laparoscopic endometrioma resection during the mid-luteal phase of the cycle. Main Outcome Measure(s): Endometrial HOXA-10, HOXA-11, LIF, ITGAV, and ITGB3 mRNA expressions were evaluated with the use of reverse-transcription polymerase chain reaction. Result(s): Significantly decreased endometrial ITGAV mRNA expression was noted in biopsies obtained from endometrioma and nonendometriotic cyst groups before surgery. Trends toward decreased endometrial HOXA-10, HOXA-11, LIF, and ITGB3 mRNA expressions were noted in the endometrioma and nonendometriotic cyst groups before surgery compared with the fertile subjects. However, the differences failed to show statistical significance. Compared with preoperative values, significantly increased HOXA-10 (12.1-fold change) and HOXA-11 (17.2-fold change) mRNA expressions were noted in endometrial biopsies obtained from subjects who were undergoing endometrioma surgery. Fold change in endometrial ITGAV mRNA after endometrioma surgery was found to be 30.1 and indicated a positive regulation. However, this fold increase was statistically insignificant. Expressions of these endometrial receptivity markers did not change significantly after surgical removal of nonendometriotic benign ovarian cysts. Conclusion(s): Laparoscopic endometrioma resection increases peri-implantation endometrial HOXA-10 and HOXA-11 mRNA expression, suggesting an improvement in endometrial receptivity. (C) 2015 by American Society for Reproductive Medicine.