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GÖNCÜ, BEYZA SERVET

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BEYZA SERVET
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GÖNCÜ
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Start date: 2010 × End date: 2019 × Has files: true ×

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    PublicationOpen Access
    Hipotiroidi Tedavisine Deneysel Alternatif Yöntem: Tiroid Dokusunun Kapsüle Edilmesi. Experimental Alternative Method for the Treatment of Hypothyroidism: Capsulation of the Thyroid Tissue.
    (2018-10-01T00:00:00Z) Yücesan, Emrah; Başoğlu, Harun; Özten Kandaş, Nur; Kanımdan, Ebru; Akbaş, Fahri; Ersoy, Yeliz Emine; Ayşan, Erhan; GÖNCÜ, BEYZA SERVET; AKBAŞ, FAHRİ; ERSOY, YELIZ EMINE
    Objective: Hypothyroidism is a clinical condition that affects all age groups. Generally, lifelong medication is required for the treatment. Despite treatment, symptoms that are related to hormone insufficiency and side effects due to long-term medication can be seen. As an alternative approach, thyroid tissue transplantation may be useful, because of its potential to elevate the thyroid hormone levels and thus increase daily quality of life for the patients. Our aim in this study was to detect the in vitro optimal microencapsulation conditions for thyroid tissues with a biocompatible polymer to avoid immune rejection following transplantation. Material and Methods: Thyroid tissues were isolated mechanically, and followed-up in two groups; tissue and capsulated tissue culture. In-vitro capsule formation and morphology were screened using brightfield microscopy and T3 and T4 levels were evaluated biochemically throughout 60 days. Results: T3 and T4 levels were screened from collected medium samples at day 3., 9., 12., 15., 30., 45., 60.. In capsuled tissues T3 level was detected higher than the non-capsuled and negative control tissues from day 15. However, T4 level was stable for 60 days.
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    PublicationOpen Access
    HLA Class I Expression Changes in Different Types of Cultured Parathyroid Cells.
    (2019-04-17T00:00:00Z) Goncu, B; Kandas, NO; Yucesan, Emrah; Aysan, E; GÖNCÜ, BEYZA SERVET; YÜCESAN, EMRAH
    Objectives: Tissue-specific immunogenicity can be characterized by the determination of human leukocyte antigens (HLA). Parathyroid hyperplasia tissue cells are presumed to have the ability to lose HLA class I expression profile during cultivation, whereas healthy parathyroid cells are presumed to already express HLA class I molecules at low levels. However, there are conflicting results about the expression of HLA class I antigens. In this study, our aim was to evaluate different patterns of HLA class I expression in different parathyroid tissue cells. Materials and Methods: Parathyroid tissue cells were isolated enzymatically and cultured in vitro. Expression of HLA class I (HLA-A, HLA-B, HLA-C) mRNA and protein levels were studied in 7 parathyroid adenomas and 9 parathyroid hyperplasia tissue samples by reverse transcriptase-polymerase chain reaction and Western blot analyses. Results: HLA-A protein expression remained stable in parathyroid adenoma and hyperplasia tissue, but HLA-A mRNA expression decreased in adenoma tissue. In parathyroid hyperplasia tissue, HLA-B protein expression remained stable, although mRNA expres sion levels decreased during cultivation. HLA-C mRNA expression was steady in parathyroid adenoma yet significantly decreased in hyperplasia tissue samples. HLA-C protein expression levels were below 30 pg for both types of parathyroid tissue during cultivation. Conclusions: HLA class I expression levels of para thyroid hyperplasia and adenoma tissue were not found to be similar. Parathyroid hyperplasia tissue is the donor tissue for the treatment of permanent hypoparathyroidism. Therefore, expression patterns of HLA class I are directly relevant to the transplant process. In particular, the HLA region is highly polymorphic, and, as a consequence of this, heterogeneous correlations among HLA-A, HLA-B, and HLA-C expression patterns of parathyroid tissue should be evaluated in detail before transplant for future studies.