Person: GÜCİN, ZÜHAL
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Publication Metadata only p53 expression and relationship with MDM2 amplification in breast carcinomas(2016-04-01) Buyukpinarbasili, NUR; Gucin, ZÜHAL; Ersoy, YELİZ EMİNE; ILBAK, Ayca; Kadioglu, HÜSEYİN; Muslumanoglu, Mahmut; BÜYÜKPINARBAŞILI, NUR; GÜCİN, ZÜHAL; ERSOY, YELIZ EMINE; KADIOĞLU, HÜSEYİNCarcinoma of the breast, like other malignancies, is a genetic disease with multiple genetic events leading to the malignant phenotype. p53 mutations are the most common genetic events in human cancer. Inactivation of p53 can be a result of mutation in gene sequence. One of the main structures that regulate p53 stabilization is MDM2. It suppresses p53 transcriptional activation by recognizing transactivation domain of p53. The loss of MDM2 function on p53 regulation results in deprivation of p53 tumor suppressor ability. Single nucleotide polymorphisms (SNP309 T->G exchange) or MDM2 amplification has been proposed to play a role in this issue. In the present study, our aim is to analyze p53 and MDM2 status and investigate their interactions in human sporadic breast carcinoma. The study groups were separated according to their molecular classifications. In each group, histologic type of the tumor, conventional prognostic parameters, p53, and MDM2 interactions were compared statistically. Tumors are divided into 4 subtypes due to estrogen and progesterone receptor status, HER-2, and Ki-67 proliferation index results. According to this classification, 23 cases are in the luminal A, 32 cases are in the luminal B, 15 cases are in the HER-2 positive, and 22 cases are in the triple-negative group, with a total of 92 cases. p53 expression is low in luminal breast carcinomas than HER-2 and triple-negative subtypes. MDM2 amplification frequency was found to be 5.4% in total. MDM2 gene amplification does not have a significant role in breast carcinogenesis, but other possible mechanisms may play a role in its inactivation. (C) 2016 Elsevier Inc. All rights reserved.Publication Metadata only Comment on: Actinomycotic Infection of the Abdominal Wall Mimicking a Malignant Neoplasm by Yi et al.(2012-12-01) Kadioglu, HÜSEYİN; Ersoy, YELİZ EMİNE; Bozkurt, SÜLEYMAN; Memmi, NAİM; CIPE, Gokhan; Gucin, ZÜHAL; MUSLUMANOGLU, Mahmut; KADIOĞLU, HÜSEYİN; ERSOY, YELIZ EMINE; BOZKURT, SÜLEYMAN; MEMMİ, NAİM; GÜCİN, ZÜHALPublication Metadata only The role of miRNAs as a predictor of multicentricity in breast cancer.(2019-02-01) AKBULUT, H; ERSOY, YELİZ EMİNE; COŞKUNPINAR, E; GÜCİN, ZÜHAL; YILDIZ, S; MALYA, FATMA ÜMİT; HASTÜRK, B; MUSLUMANOGLU, MAHMUT; ERSOY, YELIZ EMINE; GÜCİN, ZÜHAL; YILDIZ, ŞEYMA; MALYA, FATMA ÜMİTExpression profiles of miRNAs are shown to be different in various cancers to regulate expression of mRNA or to have a role in inhibition of translation, thus it shows the possible effect in progression, invasion and metastasis of breast cancer cells. The effect of breast conserving treatment in local recurrence and survival rates for the patients who have multicentric breast cancer is still controversial. In our study, we intended to evaluate the foresight of 84 miRNAs which are identified in breast cancer for having differentiated expressions. Thirty-one patients with unifocal and 26 patients with multicentric breast cancer were included in this study. These tissue samples of both malignant and normal breast tissues were kept in RNA later solution at -80 degrees C. Eighty-four miRNAs were studied with miScript miRNA PCR Array Human Breast Cancer kit. Fold change, cut off value was accepted as four. In unifocal group, there were 13 upregulated and five downregulated miRNAs and in multicentric group, there were three upregulated and seven downregulated miRNAs. To reach better results for breast cancer diagnosis and treatment, it is important to enlighten tumor biology, and pay attention to target and individual therapy. Thus, miRNAs have potential role in identifying tumor characteristics in supporting diagnosis and resulting with better evaluated disease for better treatment results with individual strategies.Publication Open Access The role of PET and MRI in evaluating the feasibility of skin-sparing mastectomy following neoadjuvant therapy.(2018-02-01) MALYA, FATMA ÜMİT; KADIOGLU, HÜSEYİN; BEKTASOGLU, HÜSEYİN KAZIM; Gucin, ZÜHAL; YILDIZ, S; GUZEL, MEHMET; ERDOGAN, EZGİ BAŞAK; YUCEL, S; ERSOY, YELİZ EMİNE; MALYA, FATMA ÜMİT; KADIOĞLU, HÜSEYİN; BEKTAŞOĞLU, HÜSEYİN KAZIM; GÜCİN, ZÜHAL; YILDIZ, ŞEYMA; GÜZEL, MEHMET; ERDOĞAN, EZGİ BAŞAK; ERSOY, YELIZ EMINEAbstract Objective: To investigate the role of positron emission tomography (PET) and magnetic resonance imaging (MRI) in evaluating the feasibility of skin-sparing mastectomy in patients with locally-advanced breast cancer (LABC) who will undergo neoadjuvant chemotherapy (NAC) by evaluating the sensitivity and specificity of PET and MRI compared with skin biopsy results before and after NAC treatment. Methods: Patients with LABC who were treated with NAC between November 2013 and November 2015 were included in this study. Demographic, clinical, radiological and histopathological features of the patients were recorded. Results: A total of 30 patients were included in the study with a mean age of 52.6 years (range, 35– 70 years). Sensitivity and specificity for detecting skin involvement in LABC was 100%/10% (62%/ 85%) with MRI and 60%/80% (12%/92%) with PET before (after) NAC, respectively. When radiological skin involvement was assessed in relation to the final histopathological results, the preNAC PET results and histopathological skin involvement were not significantly different; and there was no difference between postNAC MRI and histopathological skin involvement. Conclusions: As preNAC PET and postNAC MRI more accurately determined skin involvement, it might be possible to use these two radiological evaluation methods together to assess patient suitability for skin-sparing mastectomy in selected patients.Publication Metadata only Primary breast lymphoma; disease recurrence Primer meme lenfomasi{dotless}; yineleyen hastali{dotless}k(2012-09-18) Kadioǧlu, HÜSEYİN; YUCEL, Serap; GÜRAL, Zeynep; GÖZÜBÜYÜKOGLU, Nurhan; AKGÜN, Züleyha; YILDIZ, ŞEYMA; GÜCİN, ZÜHAL; Bozkurt, SÜLEYMAN; ERSOY, YELİZ EMİNE; MUSLUMANOGLU, Mahmut; SAGLAM, Esra Kaytan; KADIOĞLU, HÜSEYİN; YILDIZ, ŞEYMA; GÜCİN, ZÜHAL; BOZKURT, SÜLEYMAN; ERSOY, YELIZ EMINEPublication Metadata only Stem cell markers: A guide to neoadjuvant therapy in breast carcinomas(2022-06-01T00:00:00Z) Gücin, Zühal; Büyükpınarbaşılı, Nur; Geçer, Melin; Ersoy, Yeliz Emine; Türk, Hacı Mehmet; Yıldız, Şeyma; Aksoy, Direnç Özlem; GÜCİN, ZÜHAL; GEÇER, MELİN; ERSOY, YELIZ EMINE; TÜRK, HACI MEHMET; YILDIZ, ŞEYMABACKGROUND: In recent years, stem cells have been defined as the main cell population responsible for resistance to anticancer therapies. AIM: This study aims to investigate potential associations between the stem cell population and the degree of tumor regression in breast carcinomas treated with neoadjuvant therapy. SETTINGS AND DESIGN: The study included 92 patients with breast carcinoma who received neoadjuvant therapy. Tumor regression was defined based on Miller and Payne grading system. Patients with grade 1 or 2 regression on a 5‑point scale were included in group 1 (n = 37), grade 3 regression in group 2 (n = 32), and grade 4 or 5 regression in group 3 (n = 23). MATERIALS AND METHODS: Immunohistochemical staining was performed on paraffin block sections of every case using CD44, CD24, CD29, CD133, ID4, and ALDH1 antibodies to detect stem cells. STATISTICAL ANALYSIS USED: IBM Statistical Package for the Social Sciences (SPSS), version 23.0 (IBM Corp., Armonk, NY, USA) software was used for statistical analyses, and a P value less than 0.05 was considered statistically significant. RESULTS: Histologically high‑grade tumors are more common in the near‑complete/complete response group (P = 0.004). HER2‑positive tumors were more common in the complete/ near‑complete response group (P = 0.054). Tumor cells positive for stem cell markers CD44 and CD24 were more common in the poor response group (P = 0.027 and P = 0.001, respectively). CD29 expression was reduced in the posttreatment residual tumor tissue in the near‑complete/complete response group. CONCLUSION: High CD44 and CD24 expression may be a predictor of poor response/nonresponse to neoadjuvant therapy in breast carcinomas. KEY WORDS: Breast Cancers, neoadjuvant treatment, stem cell markers, stem cells, tumor regression gradePublication Open Access Intraoperative palpation of sentinel lymph nodes can accurately predict axilla in early breast cancer(2019-01-01) Ozkurt, Enver; Yardimci, ERKAN; Tukenmez, Mustafa; Ersoy, YELİZ EMİNE; Yilmaz, Ravza; Cabioglu, Neslihan; Karanlik, Hasan; Kulle, Cemil Burak; Malya, FATMA ÜMİT; Onder, Semen; Gucin, ZÜHAL; Igci, Abdullah; Ozmen, Vahit; Dinccag, Ahmet Sait; Muslumanoglu, Mahmut; YARDIMCI, ERKAN; ERSOY, YELIZ EMINE; MALYA, FATMA ÜMİT; GÜCİN, ZÜHALRecent randomized trials have shown that completion axillary lymph node dissection (ALND) is not required in all patients with a positive sentinel lymph node (SLN) who will receive radiation therapy. Although routine intraoperative pathologic assessment (IPA) becomes unnecessary and less indicated by breast surgeons in the United States and some European countries, it is still widely used all around the world. In this prospective study, the feasibility of intraoperative nodal palpation (INP) as opposed to IPA of the SLN has been analyzed. Between March 2014 and June 2015, 305 patients with clinical T1-2/N0 breast cancer from two different breast clinics (cohort A; [n = 225] and cohort B; [n = 80]) who underwent any breast surgery with sentinel lymph node biopsy (SLNB) were included in this study. Surgeons evaluated the SLNs by manual palpation before sending for IPA, and findings compared with the final pathology. The positive predictive values (PPV) of INP and IPA were 81.8% and 97.9%, respectively, whereas the negative predictive values (NPV) of INP and IPA were 83% and 92.4%. The accuracies of INP and IPA were 82.6% and 94.1%, respectively. If patients with SLNB including micrometastasis were also considered in the final pathologic assessment (FPA) (-) group that would not require a further axillary dissection, the revised NPV of INP and FPA were found to be 92.6% and 98.1%, respectively. The revised accuracy of INP also found to be increase to 86.9%. Our study, which is the only prospective one about palpation of dissected SLNs in the literature, suggests that INP can help to identify patients who do not need ALND, which encourages omitting IPA in cT1-2 N0 breast cancer.Publication Metadata only Downregulation of SCARA5 may contribute to breast cancer via promoter hypermethylation.(2018-10-05) ULKER, D; ERSOY, YELİZ EMİNE; Gucin, ZÜHAL; MUSLUMANOGLU, M; BUYRU, N; ERSOY, YELIZ EMINE; GÜCİN, ZÜHALPublication Metadata only Memenin papiller lezyonlarının karakterizayonunda kontrastlı meme MR i ve DAG in karşılaştırılması(2014-11-16) YILDIZ, ŞEYMA; TOPRAK, HÜSEYİN; ARALAŞMAK, AYŞE; ERSOY, YELİZ EMİNE; GÜCİN, ZÜHAL; YILDIZ, ŞEYMA; TOPRAK, HÜSEYİN; ARALAŞMAK, AYŞE; ERSOY, YELIZ EMINE; GÜCİN, ZÜHALPublication Metadata only New thyroid fine needle aspiration biopsy needle. Prospective, randomized, clinical study.(2014-07-15T00:00:00Z) Aysan, E; Ersoy, YELİZ EMİNE; Cengiz, M; Akbulut, H; Arici, S; Muslumanoglu, M; ERSOY, YELIZ EMINE; GÜCİN, ZÜHAL