Browsing by Author "Akgün, H."

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    ItemOpen Access
    Prognostic value of midkine, syndecan-1, hyaluronan synthase-2, sestrin-1, laminin subunit alpha-4 and fibulin-3 for malignant pleural mesothelioma
    (Termedia & Banach, 2023-03-01) Akgün, H.; Metintaş, S.; Ak, G.; Canlı, Seçil Demirkol; İşbilen, Murat; Güre, Ali Osmay; Metintaş, M.
    Introduction: The prognosis of malignant pleural mesothelioma (MPM) is poor, with a limited survival time. In this study, we aimed to examine expression levels of genes selected from relevant literature and to utilize in silico methods to determine genes whose expression could reflect the prognosis of patients with MPM by ex-vivo validation experiments. Material and methods: The study group consisted of 54 MPM patients treated with chemotherapy. Expression of 6 genes – midkine (MDK), syndecan-1 (SDC1), hyaluronan synthase-2 (HAS2), sestrin-1 (SESN1), laminin subunit alpha-4 (LAMA4), and fibulin-3 (FBLN3) – was examined by qPCR in tumor tissues. Sestrin-1 and LAMA4 were identified using an in house R-based script: Unsupervised Sur- vival Analysis Tool. Midkine, SDC1, HAS2, and FBLN3 were selected from cur- rent literature. We used two housekeeping genes, i.e. glucose-6-phosphate dehydrogenase and TATA-box binding protein, as controls. Results: Of the patients, 43 (79.6%) had epithelioid mesothelioma. The median survival for all patients was 10 (±1.2 SE) months (95% CI: 7.7–12.3). In multivariate analyses, MDK (p = 0.007), HAS2 (p = 0.008) and SESN1 (p = 0.014) expression levels were related to survival time in the whole group. In epithelioid type MPM patients, MDK (p = 0.014), FBLN3 (p = 0.029), HAS2 (p = 0.014) and SESN1 (p = 0.045) expression was related to survival time in multivariate analyses. Conclusions: High HAS2 and SESN1 expressions and low MDK are potential biomarkers of good prognosis in MPM. High HAS2 and SESN1 expression and low MDK and FBLN3 can also be utilized as biomarkers of good prognosis for epithelioid MPM. Those results should be further investigated in sera, plasma, and pleural effusions.
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    ItemOpen Access
    A series of 2,4(1H,3H)-quinazolinedione derivatives: synthesis and biological evaluation as potential anticancer agents
    (Bentham Science Publishers, 2016) Akgün, H.; Us-Yılmaz, D.; Çetin-Atalay, Rengül; Gözen, Damla
    A series of 6,7-disubstituted-3-{2-[4-(substituted)piperazin-1-yl]-2-oxoethyl}quinazoline- 2,4(1H,3H)-dione derivatives (7-34) were synthesized and their structures were elucidated on the basis of analytical and spectral (UV, IR, 1H-NMR, 13C-NMR and MS) data. These synthesized compounds were evaluated for their in vitro cytotoxicities against a panel of three human cancer cell lines. According to the cytotoxicity screening results, 3-{2-[4-(4-chlorobenzyl)piperazin-1-yl]-2-oxoethyl} quinazoline-2,4(1H,3H)-dione (7) presented the highest activity against HUH-7, MCF-7 and HCT-116 cell line with the IC50 values of 2.5, 6.8 and 4.9 µM, respectively.