Person: KAYA, HANDAN
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KAYA
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HANDAN
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Publication Open Access Identification of Differentially Expressed IGFBP5-Related Genes in Breast Cancer Tumor Tissues Using cDNA Microarray Experiments(MDPI AG, 2015-11-10) GÜLLÜ AMURAN, GÖKÇE; Akkiprik, Mustafa; Peker, Irem; Ozmen, Tolga; Amuran, Gokce Gullu; Gulluoglu, Bahadir M.; Kaya, Handan; Ozer, AyseIGFBP5 is an important regulatory protein in breast cancer progression. We tried to identify differentially expressed genes (DEGs) between breast tumor tissues with IGFBP5 overexpression and their adjacent normal tissues. In this study, thirty-eight breast cancer and adjacent normal breast tissue samples were used to determine IGFBP5 expression by qPCR. cDNA microarrays were applied to the highest IGFBP5 overexpressed tumor samples compared to their adjacent normal breast tissue. Microarray analysis revealed that a total of 186 genes were differentially expressed in breast cancer compared with normal breast tissues. Of the 186 genes, 169 genes were downregulated and 17 genes were upregulated in the tumor samples. KEGG pathway analyses showed that protein digestion and absorption, focal adhesion, salivary secretion, drug metabolism-cytochrome P450, and phenylalanine metabolism pathways are involved. Among these DEGs, the prominent top two genes (MMP11 and COL1A1) which potentially correlated with IGFBP5 were selected for validation using real time RT-qPCR. Only COL1A1 expression showed a consistent upregulation with IGFBP5 expression and COL1A1 and MMP11 were significantly positively correlated. We concluded that the discovery of coordinately expressed genes related with IGFBP5 might contribute to understanding of the molecular mechanism of the function of IGFBP5 in breast cancer. Further functional studies on DEGs and association with IGFBP5 may identify novel biomarkers for clinical applications in breast cancer.Publication Open Access Changes in 18F-FDG-PET/CT tumor metabolism are not consistent with pathologic complete response in hormone-positive breast cancer(2017-09-01) DEDE, FUAT; KAYA, HANDAN; UĞURLU, MUSTAFA ÜMİT; Kaya S., Aktas B., Tanrikulu E., ÖZTÜRK M. S., DEDE F., KAYA H., Ugurlu U., Ozgen Z., Koca S., Halil S., et al.© 2017 Zerbinis Publications. All rights reserved.Purpose: Current evaluation of response to neoadjuvant chemotherapy (NAC) shows that it could achieve pathological complete response (pCR). The purpose of this study was to assess the consistency of maximum uptake values (SUVmax) changes and pCR in hormone-positive locally advanced breast cancer (LABC). Methods: Ninety hormone-positive LABC patients treated at Marmara University Medical Oncology Clinic, Istanbul, Turkey, between 2009 and 2015 were retrospectively studied. All eligible patients (n=51) received NAC (4-8 cycles) and were evaluated for pCR. 18F-fluorodeoxyglucose positron emission tomography/ computed tomography (18F-FDG-PET/CT) scan was performed before and after the completion of NAC. The relative changes of SUVmax both in the primary tumor and the axilla were assessed for consistency with pCR. Results: The patient median age was 46 years (range 26-76). The patients 13.7% achieved pCR. Values of >50% (n=40) and 75% SUVmax changes could achieve pCR of 20%. Interestingly, most patients with complete metabolic response did not achieve pCR (81%). The difference of the Ki67 levels before and after NAC, tumor localization, HER-2 positivity, menopausal status, grade of differentiation, lymphovascular and perineural invasion were not associated with pCR. Conclusion: SUVmax changes in later cycles of NAC as commonly practised in oncology clinics were not consistent with pCR (p=1.0). Complete metabolic response may not be associated with pCR in hormone-positive LABC. However, almost 80% of patients had >50% decrease in SUVmax and may still have a chance for conservative surgery and less postoperative morbidity. Therefore, 18F-FDG-PET/CT may still have a role to evaluate the tumor response with a need of larger studies and analysis for cost-effectiveness.Publication Open Access Is Regression after Neoadjuvant Chemotherapy for Locally Advanced Breast Cancer Different in Sentinel and Non-sentinel Nodes?(SPRINGER, 2018-01) KAYA, HANDAN; Cserni, Gabor; Zombori, Tamas; Andreu, Xavier; Bianchi, Simonetta; Regitnig, Peter; Amendoeira, Isabel; Balmativola, Davide; Kovacs, Aniko; Cordoba, Alicia; Reiner, Angelika; Kulka, Janina; Kaya, Handan; Liepniece-Karele, Inta; Quinn, Cecily; Kovari, BenceTumor draining sentinel lymph nodes (SLNs) are the sites of selective changes as compared to non-SLNs. They show features of tumor-reactive lymphadenopathy, including increased total number of functional blood vessels, but a relative immunosuppressed status has also been described in them. We explored the hypothesis of a selective regression or non-regression in SLNs versus non-SLNs in 142 patients with 110 estrogen receptor-positive and 32 estrogen receptor-negative tumors undergoing both SLN biopsy and axillary lymph node dissection after neoadjuvant therapy by assessing the tumoral (metastatic) and regression statuses of SLNs and non-SLNs separately. Of the 89 cases with signs of nodal regression, 22 cases (25%) were in favor of a selective non-regression in SLNs, 18 cases (20%) were supportive of a selective and more pronounced regression in the SLNs and the remaining showed equal degrees of regression or non-regression in SLNs and non-SLNs. The results indicate that there is no obvious difference in the degree of regressive histological changes shown by SLNs and NSLNs. Therefore, this phenomenon may not be a major contributor to the higher false negative rate of SLN biopsy after neoadjuvant treatment.Publication Open Access Clinicopathologic and radiologic characteristics of pleomorphic lobular breast cancer(2021-01-01) KAYA, HANDAN; BUĞDAYCI, ONUR; UĞURLU, MUSTAFA ÜMİT; ARIKAN R., AKIN TELLİ T., ALAN Ö., DEMİRCAN N. C. , BAŞOĞLU T., ERCELEP Ö., KAYA H., BUĞDAYCI O., UĞURLU M. Ü. , ÖZGEN Z., et al.Objectives: The objective of the study was to evaluate clinicopathologic and radiologic features of patients with pleomorphic lobular breast cancer (pleomorphic lobular carcinoma [PLC]). Methods: We retrospectively evaluated the clinicopathologic and radiologic features of 25 PLC patients treated in our division from 2012 to 2018. Results: Median age was 50 (range, 42–55) and 48% were postmenopausal. The presence of spiculated mass was 92%. Median tumor size was 21.9 mm (SD±12.7 mm) and axillary lymph node positivity was 44%. Frequency of microcalcification was 12% and frequency of occult breast cancer was 8%. About 72% of patients had Stage 2 or 3 disease. De novo metastatic disease was 8% and another 8% developed metastasis during follow-up. ER, PR, and Her2/neu were positive in 76%, 44%, and 8%, respectively, and 16% of patients were triple negative. All tumors were Grade III. Median Ki-67 was 22% (range 3–90%). Frequency of lymphovascular invasion was 52%. Patients were followed median of 34.5 months (95% CI, 22.2–46.8), since during this period, two patients recurred and five died, median disease-free survival and overall survival could not be reached. Conclusion: Our data suggest that patients with PLC present with poor prognostic features such as large tumor size, axillary lymph node positivity, and high lymphovascular invasion and tumor grade and Ki-67Publication Open Access The Intensity of PLA2R and C4d_x000D_ Immunoexpression in Primary_x000D_ Membranous Nephropathy(2019) FİLİNTE, DENİZ; Deniz FİLİNTE;Hakkı ARIKAN;Mehmet KOÇ;Handan KAYA;İshak Çetin ÖZENER;Gamze AKBAŞObjective: Antibodies against the phospholipase A2 receptor (PLA2R) on podocyte membranes result in the formation of immune complexes that cause loss of function of theglomerular basement membrane in primary membranous nephropathy (PMN). It has alsobeen demonstrated that there is a deposition of complement 4d (C4d) in the glomeruli inPMN. The present study aims to evaluate PLA2R and C4d immunoexpressions in PMN casesand search the correlation with the clinical parameters.Methods: In this study, clinicopathological data and paraffin-embedded specimens werecollected from 51 patients. The formalin-fixed paraffin-embedded tissues were stained usingroutine hematoxylin-eosin, periodic acid-Schiff, and silver methenamine stains and immunostained for anti-PLA2R and C4d. Ten normal kidney tissues and 10 focal segmental glomerulosclerosis (FSGS) cases were selected as controls for PLA2R and C4d immunoexpression.Results: Of the PMN cases, 51 (100%) cases were positive for PLA2R, including 15 (29%)cases that scored 2+, and 36 (71%) cases that scored 3+. Forty of the 51 cases (78%) werepositive for C4d. The percentages of cases staining positively for C4d, per scoring group,were as follows: 31 (61%) cases faintly (1+) positive and 9 (18%) cases moderately (2+)positive. No strong positivity was observed. All of the control cases (100%) were negativefor PLA2R and C4d. There was no statistically significant difference between the intensity ofthe staining of PLA2R and the staining of C4d, proteinuria levels, creatinine levels, and complement 3 (C3) positivity. Similarly, there was no statistically significant difference betweenthe intensity of the staining of C4d and proteinuria levels, creatinine levels, and C3 positivity.Conclusion: Immunohistochemical detection of PLA2R and C4d is a safe and easy methodfor the diagnosis of PMN. In cases where fresh tissue is not available for the detection of IgGand C3 using the immunofluorescence method, positivity for PLA2R and C4d with immunohistochemistry may be beneficial for the diagnosis of PMN.Publication Open Access An unusual case of childhood sarcoidosis(SOC ARGENTINA PEDIATRIA, 2013-10-01) KARADAĞ, BÜLENT TANER; Gokdemir, Yasemin; Ersu, Refika; Karadag, Bulent; Karakoc, Fazilet; Kiyan, Gursu; Kaya, Handan; Kasapcopur, Ozgur; Erdem, Ela; Dagli, ElifSarcoidosis is a systemic granulomatous disease of unknown etiology that may affect many systems, mainly lungs. Most of the patients present at stages I and II lung involvement. Pulmonary infiltrates without hilar lymphadenopathy (state III) rarely occurs. Extrapulmonary organ involvement is common in pediatric sarcoidosis. The aim of this report is to present an unusual case of childhood sarcoidosis with stage III lung involvement without any extrapulmonary organ involvement. A 7-year-old girl presented with the complaints of malaise, fatigue, weight loss and dyspnea. There was patchy, bilateral ground glass view at high resolution computer tomography. Video assisted thoracoscopic lung biopsy was performed and histopathological examination showed nonnecrotising epitheloid-cell granulomas with giant cells. She did not have any hilar or extrapulmonary organ involvement and pulmonary sarcoidosis at stage III was diagnosed. Sarcoidosis should be considered in the differential diagnosis of children with interstitial lung disease.Publication Open Access Relationship of PPARG overexpression with prognostic parameters in papillary thyroid carcinoma(2022-02-01) ASYA, ORHAN; YUMUŞAKHUYLU, ALİ CEMAL; BAĞCI ÇULÇİ, PELİN; ŞAHİN, AKIN; OYSU, ÇAĞATAY; KAYA, HANDAN; ASYA O., YUMUŞAKHUYLU A. C., BAĞCI ÇULÇİ P., KAYA H., Gonen A., Gundogdu Y., Muradov T., ŞAHİN A., OYSU Ç.Objectives. PAX8/PPARG chromosomal rearrangement is frequently seen in thyroid cancer, and PPARG overexpression has been shown in the follicular variant of papillary thyroid carcinoma, but not in papillary thyroid carcinoma other than the follicular variant. The main aim of this study was to investigate the frequency of PPARG overexpression among papillary thyroid carcinoma and if there were any variants of papillary thyroid carcinoma with PPARG overexpression other than the follicular variant. Methods. Immunohistochemical analysis of PPARG overexpression was performed using a PPARG monoclonal antibody in a series of 111 paraffin-embedded blocks of thyroid tumours. Of the patients in our study, 100 were diagnosed with papillary thyroid carcinoma, 9 with follicular adenoma and 2 with follicular carcinoma. Results. PPARG staining was detected in 19 of the 111 cases. Sixteen patients with PPARG overexpression had papillary thyroid carcinoma and 3 had follicular adenoma. Conclusion. PPARG overexpression was detected mainly in follicular-variant papillary thyroid carcinoma. Vascular invasion, lymphatic invasion, thyroid capsule invasion and lymph node positivity were lower in patients with PPARG overexpression.Publication Open Access Periductal Stromal Tumor of the Breast: A Case Report and Review of the Literature(AVES, 2016-07-13) KAYA, HANDAN; Askan, Gokce; Aribal, Erkin; Ak, Gamze; Kaya, HandanWe present a woman aged 50 years who underwent a Tru-cut biopsy for a BI-RADS 4 lesion on her right breast and received a histopathology diagnosis of a fibroadenoma. In her one year follow-up, the lesion had progressed and she underwent an excisional biopsy. Her final diagnosis was a periductal stromal tumor. Periductal stromal tumor is an extremely rare and different entity from phylloides tumor, which makes appropriate diagnosis difficult in Tru-cut biopsy and care should be taken. Lesion progression of should require a re-biopsy. Their tendency to recur warrants follow-up. We believe that radiologic, pathologic, and clinical correlation is key in decision-making and diagnosis of these tumors.Publication Open Access Is insulin resistance a predictor for complete response in breast cancer patients who underwent neoadjuvant treatment?(BMC, 2020-12) DANE, FAYSAL; Alan, Ozkan; Akin Telli, Tugba; Aktas, Bilge; Koca, Sinan; Okten, Ilker Nihat; Hasanov, Rahib; Basoglu, Tugba; Arikan, Rukiye; Demircan, Nazim Can; Ercelep, Ozlem; Kaya, Serap; Ugurlu, Mustafa Umit; Kaya, Handan; Akgul Babacan, Nalan; Dane, Faysal; Yumuk, Perran FuldenPurpose Neoadjuvant chemotherapy is the standard front-line treatment modality in locally advanced breast cancer. Achieving pathological complete response (pCR) is a significant prognostic factor for prolonged disease-free and overall survival. Insulin resistance is defined as a pathological condition in which insulin effect is impaired in peripheral target tissues such as the skeletal muscle, liver, and adipose tissue. The relationship between breast cancer and insulin resistance is controversial. In this study, our aim is to evaluate the role of insulin resistance, body mass index (BMI), metabolic syndrome, and inflammation markers to predict complete response in breast cancer patients who underwent neoadjuvant treatment. Methods Data from 55 locally advanced non-diabetic breast cancer patients, treated with neoadjuvant chemotherapy between 2015 and 2017, were retrospectively evaluated. Homeostatic model assessment, IR = insulin resistance (HOMA-IR) was calculated by using the obtained insulin and fasting blood glucose values before neoadjuvant chemotherapy (fasting insulin x fasting glucose/405). We considered a cut-off of 2.5 for insulin resistance. The systemic inflammatory index (SII), neutrophil-lymphocyte ratio (NLR), and platelet-lymphocyte ratio (PLR) were calculated. Results Twenty-five patients had no insulin resistance. The most common pathologic subtype (56%) was hormone receptor (HR) positive and human epidermal growth factor receptor-2 (Her-2)-negative invasive ductal carcinoma. Sixteen (29%) patients had a pathological complete response (pCR). We found that the probability of pCR in patients with insulin resistance was 4.7 times lower than that in patients without insulin resistance [OR: 4.7 (95%CI 1.7-17.2),p= 0.01]. Conclusion Our results revealed that insulin resistance may have a negative effect on pathological complete response (pCR) following neoadjuvant therapy particularly with hormone-positive and Her-2-negative cases of non-diabetic breast cancer.Publication Open Access "Russell body" gastritis: A case report(2010-01-01) ÇELİKEL, ÇİĞDEM; KAYA, HANDAN; Midi A., Celikel Ç., KAYA H.Our case was a 50-year-old female who presented at the outpatients department with dyspeptic symptoms. Microscopical examination of mucosal samples from the corpus and antrum showed widespread Helicobacter pylori within the superficial mucus network, marked neutrophilic cryptitis, widespread reactive/regenerative crypt hyperplasia, intestinal metaplasia, and increased lymphoplasmocytoid cells and plasma cells full of immunoglobulin in the lamina propria. Immunohistochemical staining showed the plasma cells to be CD3 (-), CD20 (-), CD79a (+), CD45 (+), Kappa (+), and Lambda (+). It is possible for a dense accumulation of Russell bodies to be observed on a background of H. pylori taking into account that Russell bodies contain immunoglobulin aggregates and side products of immunoglobulin synthesis. However, there are only a limited number of articles evaluating this aspect. We present a case to contribute to the few articles on Helicobacter gastritis characterized by an inflammatory reaction rich in ‘’Russell’’ bodies