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    Effect of testicular morphology on embryo development to the blastocyst stage after round spermatid injection
    (E-Century Publishing Corp, 2021) Ozmerdiven, Gokhun; Guler, Yavuz; Sahin, Eren; Tatar, Zeynep; Erbin, Akif; Dirican, Ebubekir; Haliloglu, Ahmet Hakan
    If spermatozoa cannot be found after testiculer sperm extraction (TESE) in patients followed up due to nonobstructive azospermia (NOA) and the patients do not want donor spermatozoa, performance of round spermatid injection (ROSI) with the current technology seems to be the last resort. This retrospective study was conducted to evaluate the effect of testicular morphology on the development of embryos to the blastocyst stage obtained from ROSI. Between September 2019 and March 2020, after TESE and biopsy 29 patients who had only spermatid were taken to study. Tubular appearance, basal membrane appearance, Johnson score, peritubular fibrosis, interstitial fibrosis, and Leydig cell proliferation were pathologically examined. Following egg collection, ROSI was applied to the oocytes using the piezoelectric method. The embryos were monitored until the blastocyst stage. The mean age of the 29 patients was 36.3+5.01 years. Also, 7 patients had not previously undergone TESE, 20 had previously undergone once, and 2 had previously undergone twice. It was observed that having a history of TESE and a high Johnson score increased the likelihood of the embryo remaining in the blastocyst stage (P=0.021 and 0.014, respectively). However, other parameters do not affect the likelihood of blastocyst formation (P>0.05). Low TESE history and high Johnson score were associated with embryo development to the blastocyst stage. If spermatozoa are not found in patients with nonobstructive azoospermia, ROSI performed during initial TESE increases the likelihood of blastocyst formation.
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    HRM method for identification of TP53 exon 5 and 8 mutations in human prostate cancer patients
    (Elsevier, 2022) Ozmerdiven, Cagdas Gokhun; Dirican, Ebubekir; Ayan, Semih; Tatar, Zeynep; Cakir, Sami; Guler, Yavuz; Karadag, Abdullah
    Background: The purpose of the present study was to perform a high-resolution melting (HRM) analysis to discover mutations in gene exons 5-8 of tumor protein p53 (TP53), as well as the relationships of these mutations to clinical parameters in prostate cancer (PC).& nbsp;Methods: Genomic DNA was extracted from 50 formalin-fixed paraffin-embedded (FFPE) tissues with PC. Mutations in exons 5 and 8 of TP53 were analyzed using the HRM method. Sanger sequencing was used to describe mutations.& nbsp;Results: According to the HRM analysis results, 21 (42%) PC samples had different normalized and shifted melting curves from other samples. Mutations in TP53 exons 5 and8 were observed in 12 (24%) patients by the Sanger method. The detection sensitivity of the HRM method in exon 5 and exon 8 mutations was 66.7% and 50%, respectively. PSA levels of PC patients with TP53 mutation were found to be lower than that of patients with no mutation (p = 0.8270). However, we did not find any correlations between TP53 mutations and clinical parameters (p > 0.05).& nbsp;Conclusions: HRM analysis is a simple, rapid, and efficient mutation-scanning method for known/unknown mutations in TP53 exons 5and8, as well as an attractive method for detection of mutations and their analysis in FFPE tissues. Additional studies with larger patient populations are warranted to confirm the correlation between the TP53 mutations and PC risk.
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    Meme Kanseri Hastalarında hTERT Gen Ekspresyonunun Klinikopatolojik Önemi
    (2022) Dirican, Ebubekir; Kankaya, Burak; Tatar, Zeynep
    Amaç: Bu çalışma, meme kanserinde insan telomeraz ters transkriptaz (hTERT) genin mRNA ekspresyonunun klinik önemini incelemeyi ve klinikopatolojik rolünü araştırmayı amaçlamıştır. hTERT geni hücre proliferasyonu, apoptoz ve hücre invazyonu gibi olaylarda rol almaktadır. Yüksek hTERT mRNA ekspresyonunun meme kanseri, mide, akciğer, glioblastoma, baş ve boyun gibi solid tümörlerde kötü prognoz ile ilişkili olduğu bildirilmektedir. Gereç ve Yöntemler: 59 meme kanser ve sağlıklı kan örneklerinin RNA izolasyonları gerçekleştirildi. hTERT geni mRNA ekspresyonu Gerçek Zamanlı Polimeraz Zincir Reaksiyonu (RT-PZR) yöntemi ile analiz edildi. mRNA ekspresyon sonuçları 2-??ctmetoduyla kanserli ve sağlıklı örneklerde değerlendirildi. Klinik veriler toplandı ve bu verilerin hTERT gen ekspresyonu ile ilişkisi istatiksel olarak değerlendirildi. Bulgular: Meme kanser hastalarında hTERT geni mRNA ekspresyonu sağlıklı örneklere kıyasla anlamlı derecede yüksekti (p=0,0211). Düşük hTERT geni ekspresyonu östrojen reseptör (ÖR) (+) ve insan epidermal büyüme faktör reseptörü 2 (HER 2) (+) olan hastalarda anlamlı derecede ilişkiliydi (sırasıyla p=0,0464; p=0,0080). hTERT geni ekspresyonu histolojik derece (grade) 3 hastalarda derece 2’ye kıyasla yüksek anlamlı bulundu (p=0,0389). Bununla birlikte hTERT ekspresyonun bazal benzeri histolojik tipte luminal A ve luminal B’ye kıyasla anlamlı derecede yüksek olduğu gösterildi (sırasıyla p=0,0160; p=0,0008). Sonuç: Çalışmamızın bulguları, meme kanser hastalarında hTERT gen ekspresyonunun sağlıklı örneklere göre anlamlı olarak daha yüksek olduğunu gösterdi. Anormal hTERT gen ekspresyonu kanserojenez veya teşhiste önemli bir rol oynayabilir.