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  1. Article ; Online: The etiologies and management of spinal cord compression in childhood cancers: Are we aware of the emergency of cord compression?

    Okur, Arzu / Vural, Özge / Pınarlı, Faruk Güçlü

    The Turkish journal of pediatrics

    2023  Volume 65, Issue 5, Page(s) 801–808

    Abstract: Background: The spinal cord compression causes irreversible long-term permanent neurological sequelae. This study aims to increase awareness of childhood cancers that cause cord compression by comparing histopathological diagnosis, treatments, and ... ...

    Abstract Background: The spinal cord compression causes irreversible long-term permanent neurological sequelae. This study aims to increase awareness of childhood cancers that cause cord compression by comparing histopathological diagnosis, treatments, and survival rates to the literature.
    Methods: Seventy-three patients (38 male, 35 female) with spinal cord compression, among 1085 patients diagnosed with solid tumors at Gazi University Department of Pediatric Oncology between 1991 and 2021 were retrospectively evaluated.
    Results: The mean time between the onset of complaints and diagnosis was 27.5± 24.9 (2-150) days. The first three most common tumors that caused cord compression; were central nervous system tumors in 22 (30%), neuroblastoma in 17 (23%), and malignant germ cell tumors in 8 (10%) cases. Of the patients, 46 (63%) had compression due to extradural masses, and 27 (37%) patients had an intradural compression. The most common symptoms were pain in 60 (82%), weakness in 57 (78%), and pins and needles in 28 (38%) patients, respectively. The clinical physical neurological examination findings were motor deficit in 62 (84%), and deep tendon reflex changes in 54 patients (73.9%). Compression findings were detected in 58 (79.5%) patients at diagnosis, and in 15 (20.5%) of them during follow-up. The most common level of compression was seen in the thoracolumbar region in 19 (26%) cases. In 65 (89%) patients with cord compression, corticosteroids were given as anti-edema treatment. Surgical excision was performed in 39 (53%) patients. Spinal radiotherapy was given to 35 patients (48%) with radiosensitive tumors. Chemotherapy protocols were started in 52 (71.2%) cases according to their diagnoses. Complete neurological recovery was achieved in 33 (45%) patients. The 5-year overall survival rates for solid tumors with extradural compression and intradural compression were 62% and 22%, respectively (p=0.002).
    Conclusions: Neurological sequela-free recovery is possible with early diagnosis and urgent treatment. Spinal compression must be detected by detailed systemic and neurological examination and imaging methods. Patients should be rapidly transferred to pediatric oncology units after starting anti-edema treatment.
    MeSH term(s) Humans ; Male ; Child ; Female ; Spinal Cord Compression/etiology ; Spinal Cord Compression/therapy ; Spinal Cord Compression/diagnosis ; Retrospective Studies ; Neuroblastoma/complications ; Neuroblastoma/therapy ; Pain
    Language English
    Publishing date 2023-10-19
    Publishing country Turkey
    Document type Journal Article
    ZDB-ID 123487-0
    ISSN 2791-6421 ; 0041-4301
    ISSN (online) 2791-6421
    ISSN 0041-4301
    DOI 10.24953/turkjped.2023.240
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  2. Article ; Online: Prognostic Values of Primary Tumor Textural Heterogeneity and Blood Biomarkers in High-risk Neuroblastoma.

    Vural, Ozge / Aydos, Uguray / Okur, Arzu / Pinarli, Faruk Güçlü / Atay, Lütfiye Özlem

    Journal of pediatric hematology/oncology

    2023  Volume 45, Issue 7, Page(s) 383–391

    Abstract: Purpose: The aim of this study was to evaluate the prognostic value of textural parameters of primary tumors, serum lactate dehydrogenase (LDH), D -dimer, and ferritin in high-risk neuroblastoma patients.: Patients and methods: The imaging findings ... ...

    Abstract Purpose: The aim of this study was to evaluate the prognostic value of textural parameters of primary tumors, serum lactate dehydrogenase (LDH), D -dimer, and ferritin in high-risk neuroblastoma patients.
    Patients and methods: The imaging findings of 22 neuroblastoma patients (14 girls and 8 boys; age, 36.6 ± 34.2 [range: 5 to 138] months) who underwent 18-fluorodeoxyglucose positron emission tomography/computed tomography for primary staging before therapy between 2009 and 2020 were retrospectively evaluated. Positron emission tomography-derived metabolic data (maximum standard uptake value, mean standard uptake value, metabolic tumor volume, and total lesion glycolysis) and textural features of primary tumors were obtained. Serum LDH, D -dimer, and ferritin levels at the time of diagnosis were recorded. Univariate and multivariate Cox proportional hazards regression models were used to identify predictors for progression-free survival (PFS) and overall survival (OS). Survival curves were estimated by using the Kaplan-Meier method.
    Results: The median follow-up duration after diagnosis was 63 months (range: 5 to 141 mo). The median PFS and OS in all patients were 19 and 72 months, respectively. In multivariate Cox regression analyses with backward stepwise selection, grey level size zone matrix_size zone emphasis (GLSZM_SZE) was found as an independent predictor for both PFS and OS. Serum ferritin level was also found as an independent predictor for PFS. The Kaplan-Meier survival analysis showed that higher serum LDH, D -dimer, GLSZM_SZE, and zone size nonuniformity were significantly associated with shorter OS.
    Conclusion: Serum LDH, D -dimer, ferritin levels, and GLSZM_SZE of primary tumors may be used as prognostic biomarkers to identify patients with worse prognoses in high-risk neuroblastoma. GLSZM textural features showing higher tumor heterogeneity are significantly associated with shorter PFS and OS.
    MeSH term(s) Male ; Female ; Humans ; Infant ; Child, Preschool ; Child ; Prognosis ; Retrospective Studies ; Positron-Emission Tomography ; Positron Emission Tomography Computed Tomography/methods ; Biomarkers ; Fluorodeoxyglucose F18/metabolism ; Neuroblastoma/diagnostic imaging ; Ferritins ; Tumor Burden ; Radiopharmaceuticals
    Chemical Substances Biomarkers ; Fluorodeoxyglucose F18 (0Z5B2CJX4D) ; Ferritins (9007-73-2) ; Radiopharmaceuticals
    Language English
    Publishing date 2023-03-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1231152-2
    ISSN 1536-3678 ; 1077-4114 ; 0192-8562
    ISSN (online) 1536-3678
    ISSN 1077-4114 ; 0192-8562
    DOI 10.1097/MPH.0000000000002662
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  3. Article: Clinical and genetic characteristics of retinoblastoma patients in a single center with four novel

    Vural, Özge / Atalay, Hatice Tuba / Kayhan, Gulsum / Tarlan, Bercin / Oral, Merve / Okur, Arzu / Pınarlı, Faruk Güçlü / Karadeniz, Ceyda

    International journal of ophthalmology

    2023  Volume 16, Issue 8, Page(s) 1274–1279

    Abstract: Aim: To assess the clinical and genetic characteristics of children diagnosed with retinoblastoma (RB) at Gazi University Faculty of Medicine's Department of Pediatric Oncology.: Methods: All cases diagnosed with RB and received treatment and follow- ... ...

    Abstract Aim: To assess the clinical and genetic characteristics of children diagnosed with retinoblastoma (RB) at Gazi University Faculty of Medicine's Department of Pediatric Oncology.
    Methods: All cases diagnosed with RB and received treatment and follow-up in the Ophthalmology and Pediatric Oncology Department, October 2016 to May 2021 were evaluated retrospectively. The
    Results: This study included 53 cases with 67 RB-affected eyes during the study period. The mean age was 24.6 (median: 18.5, range: 3-151)mo. There were 15 (22.3%) Group D eyes and 39 (58.2%) Group E eyes. The
    Conclusion: Four novel variants are described and one of them is found in two different patients. This data is crucial for assessing prognosis. It serves as a guide for estimating the long-term risk of secondary malignancy as well as the short-term risk of developing additional malignancies in the same eye and the other eye.
    Language English
    Publishing date 2023-08-18
    Publishing country China
    Document type Journal Article
    ZDB-ID 2663246-9
    ISSN 2227-4898 ; 2222-3959
    ISSN (online) 2227-4898
    ISSN 2222-3959
    DOI 10.18240/ijo.2023.08.13
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Thymic carcinoma presenting with overlap polyarthritis and myositis: A rare paraneoplastic syndrome in childhood.

    Yıldız, Çisem / Türkcan, Büşra Topuz / Vural, Özge / Gezgin Yıldırım, Deniz / İnan, Mehmet Arda / Poyraz, Aylar / Pınarlı, Faruk Güçlü / Taştepe, İrfan / Demir, Ercan / Sunar Yayla, Emine Nur / Esmeray Şenol, Pelin / Karaçayır, Nihal / Bakkaloğlu, Sevcan A

    International journal of rheumatic diseases

    2024  Volume 27, Issue 5, Page(s) e15187

    Abstract: Thymic tumors are very rare neoplasms in children and account for less than 1% of mediastinal tumors in pediatric patients. One-third of the pediatric patients present with symptoms related to the compression of the tumor mass on the surrounding anatomic ...

    Abstract Thymic tumors are very rare neoplasms in children and account for less than 1% of mediastinal tumors in pediatric patients. One-third of the pediatric patients present with symptoms related to the compression of the tumor mass on the surrounding anatomic structures, and paraneoplastic syndromes such as myasthenia gravis, pure red cell aplasia, acquired hypogammaglobulinemia, and connective tissue disorders, which rarely occur in children with thymic tumors. Herein, we report a case of thymic carcinoma mimicking the symptoms of a connective tissue disease with symmetrical polyarthritis accompanying myositis, fever, weight loss, and malaise in a 15-year-old male patient. To our knowledge, this is the first case pediatric thymic carcinoma accompany with severe polyarthritis and myopathy, thus we have reviewed the current literature regarding the cases of thymic malignancies coexisting with paraneoplastic syndromes in children.
    MeSH term(s) Humans ; Male ; Myositis/diagnosis ; Myositis/complications ; Paraneoplastic Syndromes/diagnosis ; Paraneoplastic Syndromes/etiology ; Thymus Neoplasms/complications ; Thymus Neoplasms/diagnosis ; Adolescent ; Arthritis/diagnosis ; Arthritis/etiology ; Thymoma/complications ; Thymoma/diagnosis ; Treatment Outcome ; Thymectomy ; Biopsy
    Language English
    Publishing date 2024-05-14
    Publishing country England
    Document type Case Reports ; Review ; Journal Article
    ZDB-ID 2426924-4
    ISSN 1756-185X ; 1756-1841
    ISSN (online) 1756-185X
    ISSN 1756-1841
    DOI 10.1111/1756-185X.15187
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Assessment of PD-L1 expression in patients with neuroblastoma and renal tumors.

    Şener, Seher / Poyraz, Aylar / Okur, Arzu / Pınarlı, Faruk Güçlü / Karadeniz, Ceyda

    The Turkish journal of pediatrics

    2021  Volume 63, Issue 5, Page(s) 758–766

    Abstract: Background: Programmed death 1 (PD-1) is a co-receptor which is located at the surface of cells like natural killer, monocytes, T and B cells. It has two ligands including programmed death ligand-1 (PD-L1) and ligand-2 (PD-L2). T cell functions are ... ...

    Abstract Background: Programmed death 1 (PD-1) is a co-receptor which is located at the surface of cells like natural killer, monocytes, T and B cells. It has two ligands including programmed death ligand-1 (PD-L1) and ligand-2 (PD-L2). T cell functions are inhibited by activation of PD-1/PD-L1 pathway and this pathway is used by viruses and some tumor cells in order to escape from immune eradication. In our study we evaluated PD-L1 expression in the tissue specimens of patients with Wilms tumor, neuroblastoma and other renal tumors.
    Methods: Totally 60 patients who were followed up at Gazi University Hospital with the diagnosis of neuroblastoma, Wilms tumor and other renal tumors were included. PD-L1 expression was examined in tumor samples of the patients.
    Results: Positive staining with PD-L1 was detected only in two male patients. Both of them had neuroblastoma and advanced stage disease. None of the patients with Wilms tumor and other renal tumors had positive PD-L1 staining.
    Conclusions: Unlike adult tumors, PD-L1 expression is not common in childhood tumors due to differences in immune system between children and adults. Further studies are needed to establish the importance and effects of PD-1/PD-L1 pathway in pediatric tumors.
    MeSH term(s) B7-H1 Antigen ; Humans ; Kidney Neoplasms ; Male ; Neuroblastoma ; Programmed Cell Death 1 Receptor
    Chemical Substances B7-H1 Antigen ; CD274 protein, human ; Programmed Cell Death 1 Receptor
    Language English
    Publishing date 2021-11-12
    Publishing country Turkey
    Document type Journal Article
    ZDB-ID 123487-0
    ISSN 2791-6421 ; 0041-4301
    ISSN (online) 2791-6421
    ISSN 0041-4301
    DOI 10.24953/turkjped.2021.05.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Prognostic value of fluorodeoxyglucose positron emission tomography derived metabolic parameters and textural features in pediatric sarcoma.

    Aydos, Uğuray / Sever, Tayyibe / Vural, Özge / Topuz Türkcan, Büşra / Okur, Arzu / Akdemir, Ümit Özgür / Poyraz, Aylar / Pinarli, Faruk Güçlü / Atay, Lütfiye Özlem / Karadeniz, Ceyda

    Nuclear medicine communications

    2022  Volume 43, Issue 7, Page(s) 778–786

    Abstract: Purpose: The aim of this study was to evaluate the prognostic value of PET-derived metabolic features and textural parameters of primary tumors in pediatric sarcoma patients.: Methods: The imaging findings of 43 patients (14 girls and 29 boys; age 11. ...

    Abstract Purpose: The aim of this study was to evaluate the prognostic value of PET-derived metabolic features and textural parameters of primary tumors in pediatric sarcoma patients.
    Methods: The imaging findings of 43 patients (14 girls and 29 boys; age 11.4 ± 4.4 years) who underwent 18-fluorodeoxyglucose positron emission tomography (PET)/computed tomography for primary staging prior to therapy between 2005 and 2020 were retrospectively evaluated. The diagnoses were osteosarcoma in 10, rhabdomyosarcoma in 10, and Ewing sarcoma in 23 patients. PET metabolic data and textural features of primary tumors were obtained. Cox proportional hazards regression models were used to identify predictors for progression-free survival and overall survival. Survival curves were estimated by using the Kaplan-Meier method.
    Results: Distant metastases were detected in primary staging in 13 patients (30.2%). The median follow-up duration after diagnosis was 28 months (range: 10-171 months). In multivariate Cox regression analysis, the presence of distant metastasis and neighborhood grey-level difference matrix_Contrast (ngldm_Contrast) were found as independent predictors for both progression-free survival and overall survival. Grey-level zone length matrix_Zone-length nonuniformity (glzlm_ZLNU) was also found as an independent predictor for overall survival. The Kaplan-Meier survival analysis showed that higher ngldm_Contrast and glzlm_ZLNU values of primary tumors were significantly associated with shorter progression-free survival and overall survival.
    Conclusion: In addition to the presence of distant metastasis at initial diagnosis, textural features of primary tumors may be used as prognostic biomarkers to identify patients with worse prognosis in pediatric sarcoma. Higher tumor heterogeneity is significantly associated with shorter progression-free survival and OS.
    MeSH term(s) Adolescent ; Child ; Female ; Fluorodeoxyglucose F18 ; Humans ; Male ; Positron Emission Tomography Computed Tomography/methods ; Positron-Emission Tomography ; Prognosis ; Radiopharmaceuticals ; Retrospective Studies ; Sarcoma/diagnostic imaging
    Chemical Substances Radiopharmaceuticals ; Fluorodeoxyglucose F18 (0Z5B2CJX4D)
    Language English
    Publishing date 2022-05-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 758141-5
    ISSN 1473-5628 ; 0143-3636
    ISSN (online) 1473-5628
    ISSN 0143-3636
    DOI 10.1097/MNM.0000000000001577
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  7. Article: The comparison and diagnostic accuracy of different types of thermometers.

    Erdem, Nurettin / Demirdağ, Tuğba Bedir / Tezer, Hasan / Cura-Yayla, Burcu Ceylan / Baran-Aksakal, Fatma Nur / Tapısız, Anıl / Derinöz, Okşan / Okur, Arzu / Pınarlı, Faruk Güçlü / Koçak, Ülker / Bideci, Aysun

    The Turkish journal of pediatrics

    2021  Volume 63, Issue 3, Page(s) 434–442

    Abstract: Background: Fever is one of the leading causes of hospital admissions in children. Although there are many ways to measure body temperature, the optimal method and the anatomic site are still controversial. In this study, we aimed to evaluate the ... ...

    Abstract Background: Fever is one of the leading causes of hospital admissions in children. Although there are many ways to measure body temperature, the optimal method and the anatomic site are still controversial. In this study, we aimed to evaluate the performance of new methods of measuring body temperature and to compare the accuracy, sensitivity and specificity of these methods.
    Methods: The body temperatures of the patients who were hospitalized as inpatients or who presented to the emergency room as outpatients between November 2014- March 2015 were measured and recorded. Mercury and digital axillary measurements, tympanic, temporal artery and non-contact skin temperatures were measured. Measurements were compared with each other.
    Results: According to our results temperature tends to increase over time for up to 8 minutes after placement when using axillary thermometers. Non-contact skin thermometers should be used only for follow-up of patients with fever, because of their low sensitivity and low negative predictivity. At the first examination, tympanic thermometers and axillary thermometers may be preferable for the diagnosis of fever.
    Conclusions: According to our results, using non-contact thermometers seems feasible and logical during the follow-up ofpatients with fever, but not in cases whose exact body temperature should be known. For the first examination of the patient to diagnose fever, tympanic thermometers and axillary thermometers may be preferable. Future studies are warranted to expose the optimum way of measuring body temperature in children.
    MeSH term(s) Axilla ; Body Temperature ; Child ; Fever/diagnosis ; Humans ; Sensitivity and Specificity ; Thermometers ; Tympanic Membrane
    Language English
    Publishing date 2021-07-13
    Publishing country Turkey
    Document type Journal Article
    ZDB-ID 123487-0
    ISSN 0041-4301
    ISSN 0041-4301
    DOI 10.24953/turkjped.2021.03.010
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  8. Article ; Online: Utility of 18-fluorodeoxyglucose positron emission tomography in children with relapsed/refractory leukemia.

    Kaya, Zühre / Akdemir, Ozgür Umit / Atay, Ozlem Lütfiye / Akyürek, Nalan / Pınarlı, Faruk Güçlü / Yenicesu, İdil / Koçak, Ülker

    Pediatric hematology and oncology

    2019  Volume 35, Issue 7-8, Page(s) 393–406

    Abstract: Objective: Few data are available on the clinical significance of 18-fluorodeoxyglucose positron emission tomography (FDG-PET/CT) results in patients with leukemia. We investigated the utility of FDG-PET/CT at the time of relapsed/refractory disease in ... ...

    Abstract Objective: Few data are available on the clinical significance of 18-fluorodeoxyglucose positron emission tomography (FDG-PET/CT) results in patients with leukemia. We investigated the utility of FDG-PET/CT at the time of relapsed/refractory disease in pediatric patients with leukemia.
    Methods: Medical records of 28 children with suspected leukemia progression or recurrence during/after chemotherapy or allogeneic stem cell transplantation (allo-SCT) were retrospectively reviewed to determine the utility of FDG-PET/CT.
    Results: Twenty-two of the 28 patients have documented abnormal imaging findings during clinical follow-up, while six had were interpreted as not demonstrating signal consistent with active leukemia. Of the 22 patients with abnormal FDG-PET/CT studies 14 were found to have FDG-PET/CT reported as consistent with active leukemia and increased leukemia blasts on bone marrow biopsy. Regarding the eight patients without positive FDG-PET/CT and proven leukemia relapse, four had discordant findings on FDG-PET/CT and biopsy, and four had FDG-PET/CT reported as infection. Mean maximum standardized uptake values (SUVmax) were significantly higher among patients whose FDG-PET/CT findings were positive for leukemia as opposed to infectious disease (p < .05). Mean SUVmax was also significantly higher among patients with multifocal lesions on FDG-PET/CT than among those with diffuse lesions (p < .05).
    Conclusions: The findings suggest that FDG-PET/CT may be a complementary imaging modality that could be combined with bone marrow examination to improve detection of subtle leukemic infiltration in children with suspected leukemia progression or recurrence after chemotherapy or allo-SCT.
    MeSH term(s) Adolescent ; Antineoplastic Combined Chemotherapy Protocols/administration & dosage ; Asparaginase/administration & dosage ; Child ; Child, Preschool ; Daunorubicin/administration & dosage ; Disease-Free Survival ; Female ; Fluorodeoxyglucose F18/administration & dosage ; Follow-Up Studies ; Humans ; Male ; Positron-Emission Tomography ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/diagnostic imaging ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/microbiology ; Prednisone/administration & dosage ; Recurrence ; Retrospective Studies ; Survival Rate ; Vincristine/administration & dosage
    Chemical Substances Fluorodeoxyglucose F18 (0Z5B2CJX4D) ; Vincristine (5J49Q6B70F) ; Asparaginase (EC 3.5.1.1) ; Prednisone (VB0R961HZT) ; Daunorubicin (ZS7284E0ZP)
    Language English
    Publishing date 2019-01-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 632914-7
    ISSN 1521-0669 ; 0888-0018
    ISSN (online) 1521-0669
    ISSN 0888-0018
    DOI 10.1080/08880018.2018.1557306
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  9. Article ; Online: Assessment of brachial artery reactivity, carotid intima-media thickness, and adhesion molecules in pediatric solid tumor patients treated with anthracyclines.

    Okur, Arzu / Karadeniz, Ceyda / Özhan Oktar, Suna / Pınarlı, Faruk Güçlü / Aral, Arzu / Oğuz, Aynur

    Pediatric hematology and oncology

    2016  Volume 33, Issue 3, Page(s) 178–185

    Abstract: The aim of this study was to determine subclinical atherosclerosis and endothelial functional disturbance with measurement of carotid intima-media thickness (IMT), brachial artery reactivity (BAR), and levels of serum adhesion molecules in children with ... ...

    Abstract The aim of this study was to determine subclinical atherosclerosis and endothelial functional disturbance with measurement of carotid intima-media thickness (IMT), brachial artery reactivity (BAR), and levels of serum adhesion molecules in children with solid tumors who were treated with anthracyclines and are actually in complete remission. Fifty patients who were in remission and 30 healthy children were included in the study. Mean ages of patient and control groups were 13.5 ± 4.7 years (range: 3-23 years) and 12.00 ± 4.3 years (range: 4-21 years), respectively. The patients were divided into 3 groups according to cumulative doxorubicin dose: Group 1, ≤100 mg/m(2); Group 2, 101-299 mg/m(2); Group 3, ≥300 mg/m(2). The BAR and carotid IMT were measured in order to determine the endothelial function. The serum adhesion molecule levels in our patients and controls were also measured. The BAR of the patients with cumulative anthracycline dose ≥300 mg/m(2) was significantly lower than the patients with cumulative anthracycline dose ≤100 mg/m(2) and healthy controls (P =.005 and P =.003, respectively). Also, there was a negative correlation between brachial artery reactivity and increasing cumulative anthracycline dose (r = -.287, P =.044). We also found significant difference between the mean carotid IMT of the patients and the healthy children (P =.041). No statistically significant difference was detected between the serum levels of sICAM-1 (soluble intercellular adhesion molecule-1), sVCAM-1 (soluble vascular cell adhesion molecule-1), sE-selectin of the patients and controls. The use of anthracyclines in pediatric patients with cancer could result in increase of the carotid IMT and endothelial dysfunction.
    MeSH term(s) Adolescent ; Adult ; Anthracyclines/therapeutic use ; Brachial Artery/physiopathology ; Carotid Intima-Media Thickness ; Cell Adhesion Molecules/blood ; Child ; Child, Preschool ; E-Selectin/blood ; Female ; Humans ; Intercellular Adhesion Molecule-1/blood ; Male ; Neoplasms/drug therapy ; Neoplasms/pathology ; Neoplasms/physiopathology ; Vascular Cell Adhesion Molecule-1/blood
    Chemical Substances Anthracyclines ; Cell Adhesion Molecules ; E-Selectin ; Vascular Cell Adhesion Molecule-1 ; Intercellular Adhesion Molecule-1 (126547-89-5)
    Language English
    Publishing date 2016-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 632914-7
    ISSN 1521-0669 ; 0888-0018
    ISSN (online) 1521-0669
    ISSN 0888-0018
    DOI 10.3109/08880018.2016.1146375
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  10. Article ; Online: Epigenetic silencing of the tumor suppressor genes SPI1, PRDX2, KLF4, DLEC1, and DAPK1 in childhood and adolescent lymphomas.

    Özdemir, İhsan / Pınarlı, Faruk Güçlü / Pınarlı, Ferda Alpaslan / Aksakal, F Nur Baran / Okur, Arzu / Uyar Göçün, Pınar / Karadeniz, Ceyda

    Pediatric hematology and oncology

    2018  Volume 35, Issue 2, Page(s) 131–144

    Abstract: The aim of the study was to investigate the expression and methylation status of seven distinctive genes with tumor suppressing properties in childhood and adolescent lymphomas. A total of 96 patients with Hodgkin Lymphoma (HL, n = 41), Non-Hodgkin ... ...

    Abstract The aim of the study was to investigate the expression and methylation status of seven distinctive genes with tumor suppressing properties in childhood and adolescent lymphomas. A total of 96 patients with Hodgkin Lymphoma (HL, n = 41), Non-Hodgkin Lymphoma (NHL, n = 15), and reactive lymphoid hyperplasia (RLH, n = 40, as controls) are included in the research. The expression status of CDKN2A, SPI1, PRDX2, DLEC1, FOXO1, KLF4 and DAPK1 genes were measured with QPCR method after the RNA isolation from paraffin blocks of tumor tissue and cDNA conversion. DNA isolation was performed from samples with low gene expression followed by methylation PCR study specific to promoter regions of these genes. We found that SPI1, PRDX2, DLEC1, KLF4, and DAPK1 genes are significantly less expressed in patient than the control group (p = 0.0001). However, expression of CDKNA2 and FOXO1 genes in the patient and control groups were not statistically different. The methylation ratios of all genes excluding the CDKN2A and FOXO1 were significantly higher in the HL and NHL groups than the controls (p = 0.0001). We showed that SPI1, PRDX2, DLEC1, KLF4 and DAPK1 genes are epigenetically silenced via hypermethylation in the tumor tissues of children with HL and NHL. As CDKN2A gene was not expressed in both patient and control groups, we conclude that it is not specific to malignancy. As FOXO1 gene was similarly expressed in both groups, its relationship with malignancy could not be established. The epigenetically silenced genes may be candidates for biomarkers or therapeutic targets in childhood and adolescent lymphomas.
    MeSH term(s) Adolescent ; Child ; Death-Associated Protein Kinases/biosynthesis ; Female ; Gene Expression Regulation, Neoplastic ; Gene Silencing ; Humans ; Kruppel-Like Transcription Factors/biosynthesis ; Lymphoma/metabolism ; Lymphoma/pathology ; Male ; Peroxiredoxins/biosynthesis ; Proto-Oncogene Proteins/biosynthesis ; Trans-Activators/biosynthesis ; Tumor Suppressor Proteins/biosynthesis
    Chemical Substances DLEC1 protein, human ; GKLF protein ; Kruppel-Like Transcription Factors ; Proto-Oncogene Proteins ; Trans-Activators ; Tumor Suppressor Proteins ; proto-oncogene protein Spi-1 ; PRDX2 protein, human (EC 1.11.1.15) ; Peroxiredoxins (EC 1.11.1.15) ; DAPK1 protein, human (EC 2.7.11.1) ; Death-Associated Protein Kinases (EC 2.7.11.1)
    Language English
    Publishing date 2018-07-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 632914-7
    ISSN 1521-0669 ; 0888-0018
    ISSN (online) 1521-0669
    ISSN 0888-0018
    DOI 10.1080/08880018.2018.1467986
    Database MEDical Literature Analysis and Retrieval System OnLINE

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