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    Chitotriosidase might be a diagnostic marker in patients with hashimoto thyroiditis
    (Kare Publishing, 2023) Ozisik, H.; Suner, A.; Copur, O.; Sozmen, E.Y.; Yürekli, B.S.; Cetinkalp, S.; Ozgen, G.
    Objectives: Hashimoto’s thyroiditis (HT) is the most common organ-specific autoimmune disease. The aim of our study was to investigate a possible role of chitotriosidase (Chito) activity as a potential marker of inflammation in diagnosis of patients with HT. In addition, we aimed to determine the levels of inflammation markers such as YKL-40, high sensitivity C-reactive protein (hsCRP) and oxidative stress (OS) parameters such as thiobarbituric acid reactive substances (TBARS), catalase (CAT), superoxide dismutase (SOD), GSH-Px to evaluate an association between those inflammatory and OS markers in patients with HT. Methods: 42 patients with HT and 28 control cases were studied. All cases were euthyroid. Chito activity was measured fluorometrically based on Hollak et al’s. method. hsCRP and YKL-40 levels were measured using ELISA. TBARS, SOD, and CAT activities were determined in hemolyzates. GSH-Px activity was determined by a colorimetric assay. Results: Higher Chito concentrations were observed in patients with HT compared to the control group (p=0.002). YKL-40 levels were detected higher in HT but it was not statistically significant (p=0.810). Chito levels were positively correlated with age and negatively correlated with SOD (r=0.360, p=0.021; r=-0.368, p=0.018). YKL-40 levels were positively correlated with FT3 and SOD in HT (r=0.324, p=0.037; r=0.312, p=0.044) and negatively correlated with age (r=?0.463, p=0.002). SOD levels were negatively correlated with age and positively correlated with YKL-40 (r=?0.371, p=0.016, r=0.312, p=0.044). Conclusion: We revealed that Chito levels were higher among euthyroid HT patients. This result may point out that Chito levels could be used as a potential marker of inflammation in HT. © 2023, Kare Publishing. All rights reserved.
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    The expression of HDAC9 and P300 in papillary thyroid carcinoma cell line
    (Elsevier GmbH, 2023) Ozisik, H.; Ozdil, B.; Suner, A.; Sipahi, M.; Erdogan, M.; Cetinkalp, S.; Ozgen, G.
    Purpose: Papillary thyroid carcinoma (PTC) is the most common type of thyroid cancer and accounts for 85–90% of all thyroid cancers. Metastatic differentiated thyroid cancer, radioiodine-refractory thyroid cancer, and anaplastic thyroid cancer still lack effective therapeutic options. Here, we aimed to assess HDAC9 and P300 expression in the papillary thyroid carcinoma cell line and compare them with normal thyroid cells. Methods: Nthy-ori-3–1, a normal thyroid cell line, and BCPAP, a PTC cell line, were cultured for 24 and 48 h and immunofluorescence staining was used to determine the levels of HDAC9 and P300 protein expression. HDAC9 paracrine release was assessed using an ELISA assay. Results: HDAC9 protein expression was higher in both cell groups at the 48th hour than at the 24th hour; however, P300 protein expression was lower in BCPAP cells at the 48th hour than at the 24th hour. In comparison to Nthy-ori-3–1, BCPAP expressed more HDAC9 and P300 proteins. HDAC9 secretion slightly increased in Nthy-ori-3–1 cells from 24 to 48 h. Furthermore, HDAC9 secretion in BCPAP cells dramatically decreased from 24 to 48 h. Conclusion: Our findings revealed that the expression of HDAC9 and P300 was higher in the PTC cell line than in normal thyroid cells. This indicates that the acetylation mechanism in thyroid cancer cells is not the same as it is in healthy cells. Epigenetic studies may reveal the mechanisms underlying PTC with further analysis. © 2023 Elsevier GmbH
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    PSEUDOPSEUDOHYPOPARATHYROIDISM AS A CAUSE OF FAHR SYNDROME: HYPOPARATHYROIDISM NOT THE ONLY ONE
    (Editura Acad Romane, 2020) Ozisik, H.; Yurekli, B. S.; Tuncel, R.; Ozdemir, N.; Baklaci, M.; Ekmekci, O.; Saygili, F.
    Introduction. Fahr's syndrome is an infrequent disorder characterized by bilateral symmetrical calcification of basal ganglia and the cerebral cortex. It can be seen genetic, idiopathic, or secondary to endocrine diseases. This disease is related to different metabolic disorders particularly with diseases of the parathyroid gland. Case 1. A 63-year-old female patient applied to our clinic due to having hypoparathyroidism with bilateral basal ganglia calcification in head computed tomography(CT). She had subtotal thyroidectomy 25 years ago. in the neurological examination, mild symmetrical parkinsonism was determined. in laboratory examination Ca:8 mg/dL (8.6- 10.2), P:5.1 mg/dL (2.3-4.5), PTH:9.53 pg/mL (15-65) were detected. Calcitriol 0.25 mu/day was added to her treatment. Her parkinsonism disappeared after the treatment. Case 2. A 49-year-old male patient was consulted when he was admitted to the department of neurology in our hospital. the physical examination demonstrated the characteristics of Albright's hereditary osteodystrophy. the neurological examination shows bilateral symmetrical bradykinesia, dysphagia, and moderate dysarthria. in the laboratory examination PTH: 46.5 ng/L(15-65), Ca:8.6 mg/dL (8.6-10.2), P:2.7 mg/dL (2.3-4.5) were detected and were all within the normal ranges. Consequently, pseudopseudohypoparathyroidism was decided as a diagnosis. G protein alpha subunit mutation (Gs alpha) was not detected due to technical limitations. Conclusion. When a patient is diagnosed as Fahr's syndrome, we should keep in mind parathyroid disorders. Fahr's syndrome must be evaluated in patients showing intracranial calcification accompanied by parathyroid diseases.
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    Stemness potency and structural characteristics of thyroid cancer cell lines
    (Elsevier GmbH, 2023) Ozisik, H.; Ozdil, B.; Sipahi, M.; Erdogan, M.; Cetinkalp, S.; Ozgen, G.; Saygili, F.
    Background: Thyroid cancer is the most frequent type of endocrine malignancy. Thyroid carcinomas are derived from the follicular epithelium and classified as papillary (PTC) (85%), follicular (FTC) (12%), and anaplastic (ATC) (<3%). Thyroid cancer could arise from thyroid cancer stem-like cells (CSCs). CSCs are cancer cells that feature stem-like properties. Kruppel-like factor (KLF4) and Stage-spesific embryonic antigen 1 (SSEA-1) are types of stem cell markers. Filamentous actin (F-actin) is an essential part of the cellular cytoskeleton. The purpose of this study was to evaluate the stem cell potency and the spatial distribution of the cytoskeletal element F-actin in PTC, FTC, and ATC cell lines. Materials and methods: Normal thyroid cell line (NTC) Nthy-ori-3–1, PTC cell line BCPAP, FTC cell line FTC-133 and ATC cell line 8505c were stained with SSEA-1 and KLF4 for stem cell potency and F-actin for cytoskeleton. The morphological properties of cells were assessed by a scanning electron microscope (SEM) and elemental ratios were compared with EDS. Results: PTCs had greater percentages of SSEA-1 and KLF4 protein intensity (0.32% and 0.49%, respectively) than NTCs. ATCs had a greater proportion of KLF4 expression (0.8%) than NTCs. NTCs and FTCs had increased F-actin intensity across the cell, but PTCs had the lowest among these four cell lines. NTCs and PTCs, as well as NTCs and FTCs, have statistically identical aspect ratios and round values. These values, however, were statistically different in ATCs. Conclusion: The study of stem cell markers and the cytoskeletal element F-actin in cancer and normal thyroid cell lines may assist in the identification of new therapeutic targets and contribute in the understanding of treatment resistance mechanisms. © 2022 Elsevier GmbH