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131I-Zn-Chlorophyll derivative photosensitizer for tumor imaging and photodynamic therapy
(Elsevier, 2015) Ocakoglu K.; Er O.; Kiyak G.; Lambrecht F.Y.; Gunduz C.; Kayabasi C.
In recent years, the photodynamic therapy studies have gained considerable attention as an alternative method to surgery, chemotherapy and radiotherapy which is commonly used to fight cancer. In this study, biological potentials of a benzyloxy bearing zinc(II) pheophorbide-a (Zn-PH-A) were investigated via in vivo and in vitro experiments. Zn-PH-A was labeled with 131I with high efficiency (95.3 ± 2.7%) and its biodistribution studies were investigated on female Albino Wistar rats. The radiolabeled photosensitizer had been intravenously injected into the tail vein, and then the animals were sacrificed at 30, 60 and 120 min post injection. The percent of radioactivity per gram of organs (%ID/g) was determined. The radiolabeled Zn-PH-A showed high uptake in ovary. In addition, photodynamic therapy studies of the photosensitizer were conducted in EMT6, murine mammary carcinoma and HeLa, human cervix carcinoma cell lines. For the photodynamic therapy studies, the cells with Zn-PH-A were exposed to red light (650 nm) at the doses of 10-30 J/cm2. The results showed that Zn-PH-A has stronger PDT effect in EMT6 than HeLa cell. Our present work demonstrates 131I-labeled photosensitizer as a bifunctional agent (PDT and nuclear imaging) which could be improved in future by using EMT6 growing tumor in nude mice. © 2015 Elsevier B.V. All rights reserved © 2015 Elsevier B.V. All rights reserved. © 2015 Elsevier B.V. All rights reserved.
Antagonistic effect of oxytocin and tacrolimus combination on adipose tissue – derived mesenchymal stem cells antagonistic effect of oxytocin and tacrolimus: Antagonistic effect of oxytocin and tacrolimus
(Elsevier Masson SAS, 2018) Sir G.; Goker Bagca B.; Yigitturk G.; Cavusoglu T.; Biray Avci C.; Gunduz C.; Uyanikgil Y.
Tacrolimus (FK506) is a chemotherapeutic agent, which uses calcineurin pathway via inhibiting the stimulation of T cells to prevent the formation of immune response in the recipient individual in organ transplants. FK506 is mainly metabolized in the liver by cytochrome P450 enzyme system and is known that it has high toxic effects on different cells. Mesenchymal stem cells (MSCs) have recently gained importance since their potential to be used in cellular therapy and tissue regeneration. In some clinical cases, MSCs are transferred into the patient after the organ transplantations in order to support the treatment. Because of their immunomodulatory actions and assistance to the regeneration, popularity of MSCs have been increasing recently. However, since immunosuppressive agents have a potential cytotoxic and apoptotic effect on MSCs, researches have attempted to use it as a combination with an agent that alleviates these effects. Oxytocin (OT) is primarily acting as a neuromodulator in humans and is a peptide hormone secreted by the pituitary gland of the neurohypophysis. OT has such effects on cells as to confer resistance against oxidative stress on cells and to increase the proliferation and help regeneration. Studies on the active substance of FK506 were aimed to investigate the cytotoxic effects on human adipose tissue derived MSCs. The purpose of this study was to determine the cytotoxic, apoptotic and morphological effects of FK506, an immunosuppressive agent, on adipose tissue - derived MSC (ADMSC) which has the potential to be used for immune suppression. In addition, it was aimed to determine whether the agent could reduce the cytotoxic, apoptotic, and morphological effects on ADMSCs when used in combination with OT. For this purpose, the cytotoxic effects of the FK506 and OT on ADMSCs were determined by time and dose dependent manner by the WST-1 test. Isobologram analysis was evaluated using the WST-1 test according to IC50 values of FK506 and OT. The apoptotic effects of the agents on the ADMSCs were determined by the Annexin V method. Immunofluorescence staining was performed to determine morphological changes. Changes in the levels of oxidative stress markers were measured by colorimetric and flourometric methods using lipid peroxidation, superoxide dismutase activity, catalase activity and glutathione peroxidase assays. The IC50 values of FK506 and OT on ADMSCs were calculated as 17.44 µM and 13.43 µM, respectively.FK506 and OT were found to have antagonistic activity on ADMSCs (CI value of the combination was 1.24). The effects of the agents individually and in combination on the levels of apoptosis and oxidative stress markers have been evaluated. When the results obtained from the study are evaluated, the adipose- tissue derived mesenchymal stem cells used with takrolimus and oxytocin combination have a potential for novel treatment approaches. © 2017 Elsevier Masson SAS
Anti-cancer efficiency of natural killer cells differentiated from human adipose tissue-derived mesenchymal stem cells and transfected with miRNA150
(Morion LLC, 2017) Karlitepe A.; Kabadayi H.; Vatansever S.; Gurdal M.; Gunduz C.; Ercan G.
Aim: The aim of this study is to investigate the effects of miR150 transfection on NK-like cells differentiated from adipose tissue derived mesenchymal stem cells (AD-MSCs). Methods: NK-like cells were differentiated from AD-MSCs and activated by miR150 transfection. Transfected/non-Transfected NK-like cells were characterized by immunohistochemical and RTPCR analyzes. Apoptotic efficiency of the transfected/non-Transfected NK-like cells on pancreatic cancer cells PANC1 were determined by TUNEL and RT-PCR. Results: In miR150-Transfected cells, the increased expression of NK cell-specific genes such as GKMB, KIR2DL2, CD16, CD56, NKG2D, NKp46 and increased immunoreactivity of NK cell-specific surface marker CD314 (NKG2D) were evident. TUNEL assays showed that NK-like cells with/without transfection induced apoptosis in PANC1 cells in the same manner. The decrease in oncogene expression and the increase in the tumor suppressor gene expression in PANC1 cells upon co-culture with NK-like cells differentiated from AD-MSCs were more prominent following miRNA150 transfection. Conclusion: It was shown in vitro that NK-like cells could be obtained by differentiation from AD-MSCs and their efficiency could be increased via miR150 transfection. The results are encouraging for further clinical studies in improvement of immunotherapeutic approaches for cancer therapy. Copyright © Experimental Oncology, 2017.
Antileukemic Effects of Anti-miR-146a, Anti-miR-155, Anti-miR-181a, and Prednisolone on Childhood Acute Lymphoblastic Leukemia
(Hindawi Limited, 2021) Durmaz B.; Bagca B.G.; Cogulu O.; Susluer S.Y.; Alpay A.; Aksoylar S.; Gunduz C.
Prednisolone has been used frequently in the treatment of acute lymphoblastic leukemia. However, to overcome the challenges of the treatment, the development of additional therapies is of great importance. Small, non-protein-coding RNAs, namely, microRNAs (miRNAs), are critical epigenetic regulators with physiological and pathological importance. This study is aimed at determining the effects of miR-146a, miR-155, and miR-181a inhibition with their corresponding anti-miRs on both leukemic and healthy cells, individually and with prednisolone. Leukemic (SUP-B15) and healthy B-lymphocyte (NCI-BL 2171) cell lines were used in this study. A total of 12 experimental groups included individual and combinational silenced ALL-associated miRNAs (hsa-miR-155, hsa-miR-146a, and hsa-miR-181a) and their combination with prednisolone. Cytotoxicity, proliferation, cell cycle, and apoptosis analyses were performed by using WST-1, trypan blue, APC-BrdU, Annexin V, and JC-1 methods in each study group, respectively. To control the effectiveness of anti-miR transfection and prednisolone application, miRNA expression analysis was performed from all groups. Anti-miR application was effective on the viability, proliferation, cell cycle, and apoptosis of leukemia cells, and this effect was increased with prednisolone administration. In addition, this activity was found to be very low on healthy cells. In conclusion, anti-miR applications may have the potential for clinical use of adjuvant to or as an alternative to conventional therapies for childhood acute lymphoblastic leukemia. © 2021 Burak Durmaz et al.
Association of osteopontin and tumor necrosis factor-? levels with insulin resistance in obese patients with obstructive sleep apnea syndrome
(2011) Sarac F.; Basoglu O.K.; Gunduz C.; Bayrak H.; Biray Avci C.; Akcicek F.
Objective: The aims of this study were to compare the tumor necrosis factor (TNF)-? and osteopontin levels, to identify the relationship between insulin resistance (IR) and osteopontin levels in obese patients with and without obstructive sleep apnea syndrome (OSAS). Method: The study population included 62 obese patients (35 males, 27 females) with OSAS and was compared with 26 obese patients (16 males, 10 females) without OSAS as a control group. Polysomnographic evaluation, spirometric tests and arterial blood gas sampling were performed on the obese patients with OSAS. Plasma levels of TNF-? and osteopontin were measured by enzyme-linked immunosorbent assays during the process. IR was estimated using the homeostasis model assessment (HOMA). Results: Mean plasma levels of fasting glucose, insulin, HOMA, liver function test, hematocrit, leukocyte, TSH, free T 4, fibrinogen, TNF-?, and osteopontin were similar in the 2 groups. In patients with OSAS, mean osteopontin levels were positively correlated with mean fasting insulin levels (r=0.306, p=0.01), HOMA (r=0.299, p=0.01), apnea-hypopnea index (r=0.377, p=0.03) and Epworth Sleepiness Scale (r=0.299, p=0.01). However, mean TNF-? levels were negatively correlated with Epworth Sleepiness Scale (r=-0.298, p=0.01) in the patients with OSAS. Conclusions: It was observed that TNF-? and osteopontin levels showed no difference between obese patients with and without OSAS. However, osteopontin levels increased with fasting insulin, IR, OSAS severity, and daytime sleepiness. ©2011, Editrice Kurtis.
Association of the angiotensinogen M235T and angiotensin-converting enzyme insertion/deletion gene polymorphisms in Turkish type 2 diabetic patients with and without nephropathy
(2008) Eroglu Z.; Cetinkalp S.; Erdogan M.; Kosova B.; Karadeniz M.; Kutukculer A.; Gunduz C.; Tetik A.; Topcuoglu N.; Ozgen A.G.; Tuzun M.
Objective: Recent studies have suggested an association between a deletion variant of the angiotensin-converting enzyme (ACE) gene and diabetic nephropathy. However, this finding has not been confirmed by all investigators. Furthermore, an M235T variant of the angiotensinogen (AGT) gene has been associated with hypertension, an important risk factor for the development and progression of diabetic nephropathy. Research Design and Methods: We investigated the relationship of the ACE insertion/deletion (I/D) and AGT M235T gene polymorphisms in Turkish patients with type 2 diabetes mellitus (DM) with and without diabetic nephropathy. A total of 102 individuals were screened for the presence of the ACE I/D and AGT M235T polymorphism: 46 individuals who had type 2 DM with diabetic nephropathy and, as controls, 56 individuals who had type 2 DM without diabetic nephropathy. Gene polymorphisms were determined by the specific melting temperature (Tm) values of the resulting amplicons after real-time online polymerase chain reaction and melting curve analysis. Results: The frequencies of the ACE DD, ID, and II genotypes were 34.8%, 37.0%, and 28.3%, respectively, among type 2 diabetic patients with nephropathy, and 33.9%, 42.9%, 23.2%, respectively (P=.788), in the control subjects without diabetic nephropathy. On the other hand, the frequencies of the AGT MM, MT, and TT genotypes among the same groups were 26.1%, 52.2%, 21.7% and 26.8%, 57.1%, 16.1%, respectively (P=.758). Conclusions: There were no differences in the frequencies of the AGT M235T and ACE I/D genotypes between Turkish patients with type 2 DM with and without nephropathy. © 2008 Elsevier Inc. All rights reserved.
Comparison of CD38, ZAP70 and hTERT expression with known prognostic markers in patients with chronic lymphocytic leukemia during five-year follow- up period [Kronik lenfositik lösemili hastalarda bilinen prognostik belirteçlerin cd38 zap70 ve htert ekspresyonları ile beş yıllık takip döneminde karşılaştırılması]
(UHOD - Uluslararasi Hematoloji Onkoloji Dergisi, 2014) Vural F.; Karaca E.; Soyer N.; Gunduz C.; Sahin F.; Kosova B.; Saydam, G..; Cagirgan S.; Tombuloglu M.; Özkınay F.; Cogulu O.
Chronic Lymphocytic Leukemia (CLL) is the most common leukemia in adults. Recently CD38, ZAP70 and hTERT activity have been studied for the evaluation of the prognosis of CLL besides clinical staging and lymphocyte doubling time. There are inconsistent results regarding these markers for the evaluation of the prognosis in CLL patients. In this study CD38, ZAP70 and hTERT values in CLL patients were measured to make comparisons between each other and known prognostic factors. Thirty CLL patients who were included in the study were followed up for 5 years after the initial diagnosis. The mean hTERT value in CLL and control cases were 1.00±1.31 and 3.89±3.58, respectively (p< 0.05). The mean CD38 and ZAP70 were 6.20±7.60 and 5.51±5.67, respectively. No significant association was detected between CD38, ZAP70 and hTERT activity. There was no correlation between those parameters and known prognostic parameters such as Rai staging, peripheral lymphocyte levels, age, and sex of the patients, beta-2 microglobulin and reply to treatment in CLL. The overall five-year survival rate in CLL patients is 96.7%. The overall five-year survival rate in CLL patients is 96.7%. In conclusion, further studies including larger series of patients with longer follow-up periods are recommended. © 2014, UHOD - Uluslararasi Hematoloji Onkoloji Dergisi. All rights reserved.
Correction to: Evaluation of the effects of miRNAs in familial Mediterranean fever (Clinical Rheumatology, (2019), 38, 3, (635-643), 10.1007/s10067-017-3914-0)
(Springer London, 2019) Hortu H.O.; Karaca E.; Sozeri B.; Gulez N.; Makay B.; Gunduz C.; Atik T.; Tekin I.M.; Unsal S.E.; Cogulu O.
The name of the last author of this article was incorrectly presented as “Cogulu Ozgur” this should have been “Ozgur Cogulu”. © 2019, International League of Associations for Rheumatology (ILAR).
Corrigendum to “Parasites and immunotherapy: Immunostimulatory effect of Leishmania spp. in cancer treatment” (European Journal of Cancer (2019) 110(S1) (S33), (S0959804919301248), (10.1016/j.ejca.2019.01.098))
(Elsevier Ltd, 2019) Caner A.; Erdogan M.; Namlıses D.; Sadıqova A.; Nalbantsoy A.; Oltulu F.; Yigitturk G.; Toz S.; Gunduz C.; Ozbel Y.; Haydaroglu A.
The authors apologise that the order of authors was incorrect. The order of authors has been updated in this corrigendum. The authors would like to apologise for any inconvenience caused. © 2019
Demonstration of uniparental-isodisomy on chromosome 22q11.2 in a patient with childhood schizophrenia and facial dysmorphology by whole-genome analysis
(2012) Cogulu O.; Pariltay E.; Durmaz A.A.; Aykut A.; Gunduz C.; Ozbaran B.; Aydin H.H.; Erermis S.; Aydin C.; Özkınay F.
[No abstract available]
Detection of trisomy 21 in a fetus during the investigation for Tay-Sachs disease [2]
(2004) Alpman A.; Bora E.; Karaca E.; Cankaya T.; Onay H.; Cogulu O.; Gunduz C.; Kleijer W.J.; Özkınay F.
[No abstract available]
Determination of fetal Rhesus D status by maternal plasma DNA analysis
(Walter de Gruyter GmbH, 2013) Aykut A.; Onay H.; Sagol S.; Gunduz C.; Özkınay F.; Cogulu O.
In this study, we assessed the feasibility of fetal RhD genotyping by analysis of cell-free fetal DNA(cffDNA) extracted from plasma samples of Rhesus (Rh) D-negative pregnant women by using real-time polymerase chain reaction (PCR). Fetal genotyping was performed on 30 RhD-negative women between 9 and 39 weeks of gestation who were referred to us for invasive testing [amniocentesis/ chorionic villi sampling (CVS)]. The fetal RHD genotype was determined based on real-time PCR method. Exons 7 and 10 of the RHD and SRY genes were targeted. Among the pregnant women, 12 were carrying male and 17 were carrying female fetuses. Out of 29 pregnant women, 21 had RhD-positive and nine had RhD-negative fetuses. One sample )case 12, whose blood group was found to be AB Rh [+] (was excluded due to controversial results from repeated serological analyses. All prenatal results were in concordance with postnatal RhD status and fetal sex without false- positive or -negative results. Performing real-time PCR on cffDNA showed accurate, efficient and reliable results, allowing rapid and high throughput non invasive determination of fetal sex and RhD status in clinical samples.
Diethylenetriamine pentaacetic acid derivative of toremifene and in vitro evaluation in human breast cancer cell line MCF-7
(2011) Kilcar A.Y.; Biber Muftuler F.Z.; Unak P.; Avci C.B.; Gunduz C.
Cytotoxic and apoptotic effects of toremifene-diethylenetriamine pentaacetic acid (TOR-DTPA), formed by conjugation of TOR and DTPA, on the MCF-7 cell line were evaluated. TOR-DTPA was synthesized and qualified via gas chromatography-mass spectrometry system, thin layer chromatography, and high performance liquid chromatography methods. To screen the biological properties of TOR-DTPA at determined concentrations, our ongoing effort was to evaluate apoptotic and cytotoxic effects on the MCF-7 cell line. Trypan blue dye exclusion test, XTT, ELISA, and TUNEL assays were utilized to evaluate cytotoxicity and apoptosis. TOR-DTPA has no cytotoxic and limited apoptotic effect on the MCF-7 cell line according to the results of in vitro studies. It is concluded that the lack of obvious apoptotic and cytotoxic effects allows the already proposed ligand, TOR-DTPA, to be improved as a novel hydrophilic ligand for breast imaging. © Copyright 2011, Mary Ann Liebert, Inc.
Downregulation of miR-195 via cyclosporin a in human glioblastoma cells
(Zerbinis Publications, 2015) Susluer S.Y.; Avci C.B.; Dodurga Y.; Sigva Z.O.D.; Oktar N.; Gunduz C.
Purpose: Cyclosporin A (CsA) is a potent immunosuppressive agent. MicroRNAs (miRs) which post-transcriptionally regulate gene expression are non-coding RNAs. The aim of this study was to investigate the effects of CsA on 88 miRs expression changes in glioma cells (U-87 MG). Methods: CsA was used in U-87 MG glioma cells in doses of 10, 30 and 60 uM. Cytotoxic assays and determination of IC50 dose of CsA were performed. Relative quantification of 88 miRs was performed by real time RT-PCR. The fold changes of miRs determined and alterations in the miR expressions were compared with CsA-treated and CsA-free U-87 MG glioma cells. Results: In U-87 MG cells treated with CsA, the ICso dose was 10 µM. Seventeen of 88 human miRs were downregulated compared to the untreated control group by using miRs array. It was found that the expression levels of several miRs, in particular miR-195, was significantly decreased in CsA-treated U-87 MG cells. Conclusion: This study revealed a significant role of miR-195 in the molecular pathology of glioma cells which can also implicate potential application of miR-195 in cancer therapy. Rather than downregulation of miR-195 alone to exhibit cytotoxicity, treatment with CsA could be more effective especially on temozolomide-resistant cells.
Dual nuclear/fluorescence imaging potantial of zinc(II) phthalocyanine in MIA PaCa-2 cell line
(Bentham Science Publishers B.V., 2016) Lambrecht F.Y.; Ince M.; Er O.; Ocakoglu K.; Sarı F.A.; Kayabasi C.; Gunduz C.
Background and Objective: Pancreatic cancer is very common and difficult to diagnose in early stage. Imaging systems for diagnosing cancer have many disadvantages. However, combining different imaging modalities offers synergistic advantages. Optical imaging is the most multidirectional and widely used imaging modality in both clinical practice and research. Methods: In present study, Zinc(II) phthalocyanine [Zn(II)Pc] was synthesized, labeled with iodine- 131 and in vitro study was carried out. The intracellular uptake studies of radiolabeled Zn(II)Pc were performed in WI-38 [ATCC CCL-75™, tissue: human fibroblast lung] and MIA PaCa-2 [ATCC CRL-1420™, tissue: human epithelial pancreas carcinoma] cell lines. Results: The intracellular uptake efficiency of radiolabeled Zn(II)Pc in MIA PaCa-2 cells was determined two times higher than WI-38 cells. Also, fluorescence imaging (FI) efficiency of synthesized Zn(II)Pc was investigated in MIA PaCa-2 cells and significant uptake was observed. Conclusion: Zn(II)Pc might be used as a new agent for dual fluorescence/nuclear imaging for pancreatic cancer. © 2016 Bentham Science Publishers.
Duane anomaly, meningomyelocele, dextroposition of heart and localized vertebrocostal alterations with associated anomalies in a girl
(2007) Cogulu O.; Gunduz C.; Karaca E.; Onay H.; Superti-Furga A.; Özkınay F.
Vertebral and rib anomalies occur because of defects at different stages of embryo development and result in different malformations. Developmental field defects are the term to describe the alterations in the biological units which occur because of defects in the pattern formation. Short trunk dwarfism associated with vertebral and rib anomalies is one of the well-known conditions described under various names. Here we report on a 20-month-old female with short trunk dwarfism involving an asymmetrically malformed thorax with kyphoscoliosis presenting skeletal anomalies of spine and ribs and additional multiple associated anomalies such as downslanting palpebral fissures, long philtrum, high palate, rocker bottom feet, dextroposition of heart, cascade stomach, retroposition of bulbi duodeni and bilateral renal cortical thinning. Ophthalmological examination revealed Duane anomaly. No mutation was detected in the analysis of the DLL3 gene. The malformations in the patient are related to different progenitor fields in the early development of the embryo and the presented combination of Duane anomaly with the associated anomalies has not been reported in the literature.
Effect of resveratrol on apoptosis and MDM2, RUNX3, RB gene expressions in human acute myeloid leukemia cells by transfection of MATRA-mediated miR-150 [MATRA aracılı miR-150’nin transfeksiyonu ile insan akut myeloid lösemi hücrelerinde resveratrol’ün MDM2,RUNX3,RB gen ekspresyonları ve apoptoz üzerine etkisi]
(UHOD - Uluslararasi Hematoloji Onkoloji Dergisi, 2018) Okcanoglu T.B.; Susluer S.Y.; Kayabasi C.; Yelken B.O.; Saydam G.; Avci C.B.; Gunduz C.
Acute myeloid leukemia (AML) is a heterogeneous group of hematopoietic malignancies. Magnet assisted transfection (MATRA) is one of the most effective non-viral transfection methods. We aimed to evaluate the apoptotic effect of resveratrol (RES), MDM2, RUNX3, RB gene expression exchanges and MicroRNA-150 (miR-150) transfected with MATRA to HL-60 cells. MATRA was used as non-viral vector carrier for miR-150 transfection. IC50 dose of RES was determineted by Fahri et al. Resveratrol and miR-150 transfected cells were performed apoptosis and MDM2, RUNX3, RB gene expression assays in Human promyelocytic leukemia (HL-60) cells. IC50 dose of RES was used as 5 ?M. In HL-60 cells, it was found that miR-150, miR150-Resveratrol combination, resveratrol alone induces apoptosis by 6.48, 6.93 and 4.54 fold, respectively, compared to the control cells. Compared to control cells, MDM2, RUNX3, RB, gene expressions decreased (miR-150) 1.7, 1.3 and 1.4 fold, (miR-150-resveratrol) MDM2 expression increased 2.73 fold, RUNX3 and RB expression decreased 6.1, 1.07 fold, respectively. Combination with resveratrol, MDM2, RB decreased 2.9 and 1.4 fold, respectively. Non-viral miR-150 transfection may be effective in leukemia cells, induction of apoptotic effects and gene expression changes, following treatment with resveratrol and miR-150-resveratrol combinations. © 2018, UHOD - Uluslararasi Hematoloji Onkoloji Dergisi. All rights reserved.
Effect of resveratrol on apoptosis and MDM2, RUNX3, RB gene expressions in human acute myeloid leukemia cells by transfection of MATRA-mediated miR-150 [MATRA aracılı miR-150’nin transfeksiyonu ile insan akut myeloid lösemi hücrelerinde resveratrol’ün MDM2,RUNX3,RB gen ekspresyonları ve apoptoz üzerine etkisi]
(UHOD - Uluslararasi Hematoloji Onkoloji Dergisi, 2018) Okcanoglu T.B.; Susluer S.Y.; Kayabasi C.; Yelken B.O.; Saydam, G..; Avci C.B.; Gunduz C.
Acute myeloid leukemia (AML) is a heterogeneous group of hematopoietic malignancies. Magnet assisted transfection (MATRA) is one of the most effective non-viral transfection methods. We aimed to evaluate the apoptotic effect of resveratrol (RES), MDM2, RUNX3, RB gene expression exchanges and MicroRNA-150 (miR-150) transfected with MATRA to HL-60 cells. MATRA was used as non-viral vector carrier for miR-150 transfection. IC50 dose of RES was determineted by Fahri et al. Resveratrol and miR-150 transfected cells were performed apoptosis and MDM2, RUNX3, RB gene expression assays in Human promyelocytic leukemia (HL-60) cells. IC50 dose of RES was used as 5 µM. In HL-60 cells, it was found that miR-150, miR150-Resveratrol combination, resveratrol alone induces apoptosis by 6.48, 6.93 and 4.54 fold, respectively, compared to the control cells. Compared to control cells, MDM2, RUNX3, RB, gene expressions decreased (miR-150) 1.7, 1.3 and 1.4 fold, (miR-150-resveratrol) MDM2 expression increased 2.73 fold, RUNX3 and RB expression decreased 6.1, 1.07 fold, respectively. Combination with resveratrol, MDM2, RB decreased 2.9 and 1.4 fold, respectively. Non-viral miR-150 transfection may be effective in leukemia cells, induction of apoptotic effects and gene expression changes, following treatment with resveratrol and miR-150-resveratrol combinations. © 2018, UHOD - Uluslararasi Hematoloji Onkoloji Dergisi. All rights reserved.
Effects of quercetin induced cell death on a novel gene "URG4/URGCP" expression in leukemia cells
(2012) Dodurga Y.; Avci C.B.; Satiroglu-Tufan L.N.; Susluer S.Y.; Sigva O.D.Z.; Saydam, G..; Gunduz C.
The present study aimed to investigate anti-proliferative and apoptotic effects of quercetin on human leukemia cells and effects of quercetin-induced cell death on a novel gene Up-regulated gene 4/upregulator of cell proliferation (URG4/URGCP), in leukemia cells. URG4/URGCP expression is determined by using RT-PCR. IC 50 of quercetin was determined as 25 microM in CCRF-CEM, HL-60 and K562 cells. In IC 50 dose group, URG4/URGCP expression was decreased 99% in HL-60 cells, 90% in CCRF-CEM cells, and 52% (24 hour) - 99% (72 hour) in K-562 cells. URG4/URGCP may play important roles in the development of leukemia, and might be a useful molecular marker for predicting the prognosis of leukemia via quercetin treatment. © 2012 Dodurga Y, et al.
The emphasis of tumor suppressor genes and oncogenes in diagnosis and prognosis of anaplastic brain tumors [Anaplastik beyin tümörlerinin tani{dotless} ve prognozunda tümör süpressör genlerin ve onkogenlerin önemi]
(2012) Avci Ç.B.; Susluer S.Y.; Dodurga Y.; Akalin T.; Cogulu O.; Dalbasti T.; Oktar N.; Gunduz C.
The aim of the study is to the determine the profiles of tumor suppressor genes and oncogenes which cause brain tumor, establishing the association between the prognosis of cancer and the quantitation of genetic and epigenetic changes, and bringing a molecular approach to definite diagnosis. For this purpose, explant cell cultures are performed from the anaplastic brain tumor tissues of the cases. The expression analysis of the tumor suppressor genes (p53, RB1, PTEN, MGMT, RUNX3, DMBT1, PIKE) and oncogenes (EGFR, PIK3CA, MDM2, Olig2, GSTT1, COX-2 and hTERT) were determined by comparing the expression of GAPDH housekeeping gene using real-time online RT-PCR. The promoter regions of all the tumor suppressor genes' hypermethylation and also methylated and unmethylated copy numbers were determined with Q-PCR by using methylation specific primer and probes and the quantitation was carried out by comparing with each other. A significant difference was determined among the oncogenes; EGFR and hTERT gene expressions in patient tumor group. hTERT gene expression showed a significant difference with tumor grades. DMBT1 gene expression showed a significant difference with tumor grades. A prominent decrease was found in the aberration of tumor suppressor gene copy number in the glioma group. Gene copy number and gene expression of GSTT1 gene showed a significant correlation. RB1 and MGMT promoter methylation showed a significant difference in tumor patient group. Over expression of PIK3CA, EGFR and COX-2 among oncogenes and loss of copy number of PTEN, RB1 and RUNX3 among tumor suppressor genes found associated with short survival.

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