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Qipa E, Acar M, Bozkurt S, Buyukdogan M, Sonmez HB, Sayitoglu M, Erbilgin Y, Karakaş Z, Hançer VS. Novel RUNX1 Variation in B-cell Acute Lymphoblastic Leukemia. Mediterr J Hematol Infect Dis 2023; 15:e2023036. [PMID: 37435033 PMCID: PMC10332349 DOI: 10.4084/mjhid.2023.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 05/31/2023] [Indexed: 07/13/2023] Open
Abstract
Acute lymphoblastic leukemia (ALL) is a malignant disease of hematopoietic stem cells. B cell ALL (B-ALL) is characterized by highly proliferative and poorly differentiated progenitor B cells in the bone marrow. Chromosomal rearrangements, aberrant cell signaling, and mutations lead to dysregulated cell cycle and clonal proliferation of abnormal B cell progenitors. In this study, we aimed to examine hot spot genetic variations in the RUNX1, IDH2, and IL2RA genes in a group of (n=52) pediatric B-ALL. Sanger sequencing results revealed a rare RUNX1 variant p.Leu148Gln in one B-ALL patient with disease recurrence. Additionally, common intronic variations rs12358961 and rs11256369 of IL2RA were determined in two patients. None of the patients had the IDH2 variant. RUNX1, IDH2, and IL2RA variations were rare events in ALL. This study detected a novel pathogenic RUNX1 variation in a patient with a poor prognosis. Examining prognostically important genetic anomalies of childhood lymphoblastic leukemia patients and the signaling pathway components will pilot more accurate prognosis estimations.
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Affiliation(s)
- Egzona Qipa
- Istinye University, Institute of Health Sciences, Department of Medical Biology and Genetics, Istanbul, Turkey
| | - Muradiye Acar
- Istinye University, Faculty of Medicine, Department of Medical Genetics, Istanbul, Turkey
| | - Sureyya Bozkurt
- Istinye University, Faculty of Medicine, Department of Medical Biology, Istanbul, Turkey
| | | | - Hazal B. Sonmez
- Istinye University, Institute of Health Sciences, Department of Medical Biology and Genetics, Istanbul, Turkey
| | - Muge Sayitoglu
- Aziz Sancar Institute of Experimental Medicine, Department of Genetics, Istanbul University, Istanbul, Turkey
| | - Yucel Erbilgin
- Aziz Sancar Institute of Experimental Medicine, Department of Genetics, Istanbul University, Istanbul, Turkey
| | - Zeynep Karakaş
- Istanbul University, Istanbul Faculty of Medicine Pediatric Hematology Oncology Department, Istanbul, Turkey
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2
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Firtina S, Erbilgin Y, Hatirnaz Ng O, Karaman S, Karakas Z, Celkan TT, Gelen SA, Yildirmak Y, Ozbek U, Sayitoglu M. Impact of TP53 gene variants on prognosis and survival of childhood acute lymphoblastic leukemia. Scand J Clin Lab Invest 2023; 83:187-193. [PMID: 37029683 DOI: 10.1080/00365513.2023.2195682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2023]
Abstract
The tumor suppressor protein 53 (TP53) gene is one of the most studied genes in cancer. Although TP53 variants are rare events in acute leukemia, recent observations showed that relapse samples might harbor TP53 variants. Here, we aimed to determine TP53 variants (hotspot region, exon 4-11) in childhood acute lymphoblastic leukemia (B and T-ALL) patients (n = 94) including diagnostic-relapse pairs (n = 15) by amplicon sequencing and evaluate the clinical impact of these variants. In total, nine different (E298*, R283C, R273H, L252F, C229F, I195T, E286G, c.955_956insC, and c.920-1G > C) variants were identified in 17 (18%) childhood ALL patients. c.(920-1G> C) splice site variant and c.(955_956insC) insertion were reported for the first time. In diagnose-relapse pair samples, we identified acquired and/or loss of TP53 variants in the samples at the time of relapse. TP53 variants were found to be more common in T-ALL (37%) than in B-ALL patients (9%). Pathogenic TP53 variants were associated with a shorter overall survival time (p = 0.001).TP53 variants were found to be associated with inferior outcomes in our cohort and can be an independent risk factor for poor prognosis in childhood acute leukemia patients. Identification of low-frequent variants with next-generation sequencing approaches enables better knowledge of the clonal dynamics of ALL.
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Affiliation(s)
- Sinem Firtina
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
- Department of Medical Genetics, Istanbul University-Cerrahpasa, Cerrahpasa School of Medicine, Istanbul, Turkey
| | - Yucel Erbilgin
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Ozden Hatirnaz Ng
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
- Department of Medical Biology, Acibadem University, Acibadem School of Medicine, Istanbul, Turkey
| | - Serap Karaman
- Pediatric Hematology Oncology Department, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Zeynep Karakas
- Pediatric Hematology Oncology Department, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Tulin Tiraje Celkan
- Cerrahpasa Faculty of Medicine, Department of Pediatric Hematology Oncology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Sema Aylan Gelen
- Department of Pediatric Hematology, Kocaeli University Hospital, Kocaeli, Turkey
| | - Yildiz Yildirmak
- Pediatric Hematology Division, Ministry of Health Sisli Etfal Education and Research Hospital, Istanbul, Turkey
| | - Ugur Ozbek
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
- Department of Medical Genetics, Acibadem University, Acibadem School of Medicine, Istanbul, Turkey
| | - Muge Sayitoglu
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
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3
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Sahin S, Sudutan T, Kavla Y, Durcan E, Özogul YY, Poyraz BC, Sayitoglu M, Ozkaya HM, Kadioglu P. A Genetic Assessment of Dopamine Agonist-Induced Impulse Control Disorder in Patients with Prolactinoma. J Clin Endocrinol Metab 2022; 108:e275-e282. [PMID: 36494095 DOI: 10.1210/clinem/dgac718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/30/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022]
Abstract
CONTEXT Dopamine agonist-induced (DA-induced) impulse control disorder (ICD) represents a group of behavioral disorders that are increasingly recognized in patients with prolactinoma. OBJECTIVE We aimed to examine the genetic component of the underlying mechanism of DA-induced ICD. METHODS Prolactinoma patients receiving dopamine agonist (cabergoline) treatment were included in the study. These patients were divided into two groups: patients who developed ICD due to DA and patients who did not. Patients were evaluated for polymorphisms of the DRD1, DRD3, COMT, DDC, GRIN2B, TPH2, OPRK1, OPRM1, SLC6A4, SLC6A3, HTR2A genes. RESULTS Of the 72 prolactinoma patients using cabergoline, 20 were diagnosed with ICD. When patients with and without ICD were compared according to genotype frequencies; OPRK1/rs702764, DRD3/rs6280, HTR2A/rs6313, SLC6A4/rs7224199, GRIN2B/rs7301328, TPH2/rs7305115, COMT/rs4680, DRD1/rs4532 polymorphisms significantly increased in patients with DA-induced ICD. CONCLUSION Our results show that multiple neurotransmission systems affect DA-induced ICD in patients with prolactinoma.
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Affiliation(s)
- Serdar Sahin
- Division of Endocrinology, Metabolism and Diabetes, Department of Internal Medicine, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Tugce Sudutan
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
- Institute of Health Sciences, Istanbul University, Istanbul, Turkey
| | - Yasin Kavla
- Department of Psychiatry, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Emre Durcan
- Division of Endocrinology, Metabolism and Diabetes, Department of Internal Medicine, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Yeliz Yagiz Özogul
- Department of Internal Medicine, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Burc Cagri Poyraz
- Department of Psychiatry, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Muge Sayitoglu
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Hande Mefkure Ozkaya
- Division of Endocrinology, Metabolism and Diabetes, Department of Internal Medicine, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Pinar Kadioglu
- Division of Endocrinology, Metabolism and Diabetes, Department of Internal Medicine, Cerrahpasa Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
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Firtina S, Ng YY, Ng OH, Kiykim A, Ozek EY, Kara M, Aydiner E, Nepesov S, Camcioglu Y, Sayar EH, Gungoren EY, Reisli I, Torun SH, Haskologlu S, Cogurlu T, Kaya A, Cekic S, Baris S, Ozbek U, Ozen A, Sayitoglu M. Correction to: Primary antibody deficiencies in Turkey: molecular and clinical aspects. Immunol Res 2021; 70:134. [PMID: 34668146 DOI: 10.1007/s12026-021-09248-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sinem Firtina
- Istanbul University Graduate School of Health Sciences, Istanbul, Turkey.,Department of Bioinformatics and Genetics, Engineering and Natural Sciences Faculty, Istinye University, Istanbul, Turkey
| | - Yuk Yin Ng
- Department of Genetics and Bioengineering, Istanbul Bilgi University, Istanbul, Turkey
| | - Ozden H Ng
- Department of Medical Biology, Acibadem School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Ayca Kiykim
- Department of Infectious Diseases and Clinical Immunology, Cerrahpasa School of Medicine, Istanbul University, Istanbul, Turkey
| | - Esra Yucel Ozek
- Department of Clinical Immunology, Istanbul School of Medicine, Istanbul University, Istanbul, Turkey
| | - Manolya Kara
- Istinye University Faculty of Medicine, VM MedicalPark Pendik Hospital, Pediatric Infectious Diseases Clinic, Istanbul, Turkey
| | - Elif Aydiner
- Department of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey
| | - Serdar Nepesov
- Department of Pediatric Allergy Immunology, Medipol University, Istanbul, Turkey
| | - Yildiz Camcioglu
- Department of Infectious Diseases and Clinical Immunology, Cerrahpasa School of Medicine, Istanbul University, Istanbul, Turkey
| | - Esra H Sayar
- Department of Pediatric Immunology and Allergy, Meram Medical Faculty, Necmettin Erbakan University, Konya, Turkey
| | - Ezgi Yalcin Gungoren
- Department of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey
| | - Ismail Reisli
- Department of Pediatric Immunology and Allergy, Meram Medical Faculty, Necmettin Erbakan University, Konya, Turkey
| | - Selda H Torun
- Department of Clinical Immunology, Istanbul School of Medicine, Istanbul University, Istanbul, Turkey
| | - Sule Haskologlu
- Department of Pediatric Immunology and Allergy, Ankara University School of Medicine, Ankara, Turkey
| | - Tuba Cogurlu
- Department of Pediatric Immunology and Allergy, Kocaeli University, Kocaeli, Turkey
| | - Aysenur Kaya
- Istinye University Faculty of Medicine, VM MedicalPark Pendik Hospital, Pediatric Infectious Diseases Clinic, Istanbul, Turkey
| | - Sukru Cekic
- Department of Pediatric Immunology, Uludag University School of Medicine, Bursa, Turkey
| | - Safa Baris
- Department of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey
| | - Ugur Ozbek
- Department of Medical Genetics, Acibadem School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Ahmet Ozen
- Department of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey
| | - Muge Sayitoglu
- Istanbul University Graduate School of Health Sciences, Istanbul, Turkey. .,Department of Genetics, Aziz Sancar Institute of Experimental Medical Research, Istanbul University, Istanbul, Turkey.
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5
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Soydas T, Sayitoglu M, Sarac EY, Cınar S, Solakoglu S, Tiryaki T, Sultuybek GK. Metformin reverses the effects of high glucose on human dermal fibroblasts of aged skin via downregulating RELA/p65 expression. J Physiol Biochem 2021; 77:443-450. [PMID: 34129225 DOI: 10.1007/s13105-021-00823-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 06/03/2021] [Indexed: 10/21/2022]
Abstract
Metformin has been successfully used as an anti-aging agent but exact molecular mechanisms of metformin in anti-aging remain unknown. Hyperglycemia during skin aging not only causes oxidative damage to cellular macromolecules, like dermal collagen, but also modulates the activation of transcription factor nuclear factor kappa B (NF-kB). We aimed to investigate in vitro effects of high glucose (HG) and metformin treatment on proliferation and apoptosis of human primary dermal fibroblasts (HDFs), and the expression of COL1A1, COL3A1, and RELA/p65 genes. Effects of normal glucose (5.5 mM) and HG concentration (50 mM HG) on HDFs, with two doses of metformin (50 μM and 500 μM), were investigated by immunostaining. Apoptotic levels were analyzed by flow cytometry. Expression of COL1A1, COL3A1, and RELA/p65 genes was measured by quantitative real-time PCR. The proliferation of HDFs was decreased significantly (P < 0.01) and expression of COL1A1 was downregulated by HG without metformin, whereas proliferation was elevated and expression was upregulated with 500 μM metformin + HG compared to 5.5 mM glucose (P < 0.05). The expression of COL3A1 and RELA/p65 were upregulated (P < 0.01 for COL3A1), and percentage of late apoptotic cells increased significantly by HG without metformin (P < 0.001) while it decreased in two concentrations of metformin dramatically compared with 5.5 mM glucose (P < 0.01 for expressions and < 0.001 for apoptosis). Metformin not only significantly downregulated RELA/p65 expression, but also inhibited the apoptosis of HDFs from aged human skin at toxic glucose concentrations which could be inversely mediated via COL1A1 and COL3A1 expression.
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Affiliation(s)
- Tugba Soydas
- Department of Medical Biology and Genetics, Medical Faculty, Istanbul Aydin University, Istanbul, Turkey
| | - Muge Sayitoglu
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Elif Yaprak Sarac
- Department of Histology and Embryology Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Suzan Cınar
- Department of Immunology, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Seyhun Solakoglu
- Department of Histology and Embryology Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Tunc Tiryaki
- Department of Plastic Surgery, Cellest Plastic Surgery Clinic, Istanbul, Turkey
| | - Gonul Kanıgur Sultuybek
- Department of Medical Biology, Faculty of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey.
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6
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Erbilgin Y, Hatirnaz Ng O, Can I, Firtina S, Kucukcankurt F, Karaman S, Karakas Z, Celkan TT, Zengin E, Aylan Gelen S, Nihal Ozdemir G, Yildirmak Y, Dogru O, Tansel T, Khodzhaev K, Toluk O, Ozbek U, Sayitoglu M. Prognostic evidence of LEF1 isoforms in childhood acute lymphoblastic leukemia. Int J Lab Hematol 2021; 43:1093-1103. [PMID: 33844466 DOI: 10.1111/ijlh.13513] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 12/06/2020] [Accepted: 02/25/2021] [Indexed: 12/17/2022]
Abstract
INTRODUCTION The lymphoid enhancer factor 1 (LEF1) is a DNA-binding transcription factor that functions in the Wnt signaling pathway. Increased LEF1 activity is associated with progression of several types of cancer including leukemia. Here, we investigated LEF1 isoform expression and genomic variations in acute lymphoblastic leukemia (ALL). METHODS LEF1 isoform expression was evaluated by quantitative real-time PCR in 87 newly diagnosed childhood ALL patients and controls. Moreover, Western blot analysis was performed for detection of LEF1 expression and the hotspot region of LEF1 was screened by deep sequencing. RESULTS The LEF1 mRNA expression of B cell ALL patients was higher than the controls (LEF1-total P = .011, LEF1-long P = .026). Moreover, B-ALL samples showing higher total LEF1 expression had significantly shorter relapse-free survival (P = .008) and overall survival (P = .011). Although full-length LEF1 expression was similar to the controls in T-ALL, 50% (n = 15) of the ALL patients had increased full-length LEF1 protein expression. Imbalance between short- and full-length LEF1 isoforms may lead to cell survival in ALL. Beside the LEF1 activation, LEF1 gene variations were rarely observed in our cohort. CONCLUSION The results indicate that the Wnt pathway may have a pathogenic function in a group of ALL patients and high LEF1-total expression might be a marker for shorter relapse-free survival time in B cell ALL.
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Affiliation(s)
- Yucel Erbilgin
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Ozden Hatirnaz Ng
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey.,Faculty of Medicine, Department of Medical Biology, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Ismail Can
- Institute of Health Sciences, Istanbul University, Istanbul, Turkey
| | - Sinem Firtina
- Institute of Health Sciences, Istanbul University, Istanbul, Turkey.,Faculty of Art and Science, Department of Molecular Biology and Genetics, Istinye University, İstanbul, Turkey
| | - Fulya Kucukcankurt
- Institute of Health Sciences, Istanbul University, Istanbul, Turkey.,Faculty of Medicine, Altınbaş University, Istanbul, Turkey
| | - Serap Karaman
- Istanbul Faculty of Medicine, Pediatric Hematology Oncology Department, Istanbul University, Istanbul, Turkey
| | - Zeynep Karakas
- Istanbul Faculty of Medicine, Pediatric Hematology Oncology Department, Istanbul University, Istanbul, Turkey
| | - Tulin Tiraje Celkan
- Pediatric Hematology Oncology Department, Istanbul University-Cerrahpasa Faculty of Medicine, Istanbul, Turkey
| | - Emine Zengin
- Faculty of Medicine, Department of Pediatric Hematology, Kocaeli University, Kocaeli, Turkey
| | - Sema Aylan Gelen
- Faculty of Medicine, Department of Pediatric Hematology, Kocaeli University, Kocaeli, Turkey
| | - Gul Nihal Ozdemir
- Pediatric Hematology Division, Istanbul Kanuni Sultan Suleyman Education and Research Hospital, Istanbul, Turkey
| | - Yildiz Yildirmak
- Pediatric Hematology Division, Ministry of Health Sisli Etfal Education and Research Hospital, Istanbul, Turkey
| | - Omer Dogru
- Pediatric Hematology and Oncology Department, Marmara University School of Medicine, Istanbul, Turkey
| | - Turkan Tansel
- Istanbul Medical Faculty, Department of Cardiovascular Surgery, Istanbul University, Istanbul, Turkey
| | - Khusan Khodzhaev
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey.,Institute of Health Sciences, Istanbul University, Istanbul, Turkey
| | - Ozlem Toluk
- Department of Biostatistics and Medical Informatics, Bezmialem Vakif University Faculty of Medicine, Istanbul, Turkey
| | - Ugur Ozbek
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey.,Faculty of Medicine, Department of Medical Genetics, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Muge Sayitoglu
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
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7
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Ozkaya HM, Sayitoglu M, Comunoglu N, Sun E, Keskin FE, Ozata D, Hocaoglu RH, Khodzaev K, Firtina S, Tanriover N, Gazioglu N, Oz B, Kadioglu P. G-protein Coupled Estrogen Receptor Expression in Growth Hormone Secreting and Non-Functioning Adenomas. Exp Clin Endocrinol Diabetes 2020; 129:634-643. [PMID: 33091936 DOI: 10.1055/a-1274-1330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE To evaluate the expression of G-protein coupled estrogen receptor (GPER1), aromatase, estrogen receptor α (ERα), estrogen receptor β (ERβ), pituitary tumor transforming gene (PTTG), and fibroblast growth factor 2 (FGF2) in GH-secreting and non-functioning adenomas (NFA). METHODS Thirty patients with acromegaly and 27 patients with NFA were included. Gene expression was determined via quantitative reverse transcription polymerase chain reaction (QRT-PCR). Protein expression was determined via immunohistochemistry. RESULTS There was no difference, in terms of gene expression of aromatase, ERα, PTTG, and FGF2 between the two groups (p>0.05 for all). ERβ gene expression was higher and GPER1 gene expression was lower in GH-secreting adenomas than NFAs (p<0.05 for all). Aromatase and ERβ protein expression was higher in GH-secreting adenomas than NFAs (p=0.01). None of the tumors expressed ERα. GPER1 expression was detected in 62.2% of the GH-secreting adenomas and 45% of NFAs. There was no difference in terms of GPER1, PTTG, FGF2 H scores between the two groups (p>0.05 for all). GPER1 gene expression was positively correlated to ERα, ERβ, PTTG, and FGF2 gene expression (p<0.05 for all). There was a positive correlation between aromatase and GPER1 protein expression (r=0.31; p=0.04). CONCLUSIONS GPER1 is expressed at both gene and protein level in a substantial portion of GH-secreting adenomas and NFAs. The finding of a positive correlation between GPER1 and ERα, ERβ, PTTG, and FGF2 gene expression and aromatase and GPER1 protein expression suggests GPER1 along with aromatase and classical ERs might mediate the effects of estrogen through upregulation of PTTG and FGF2.
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Affiliation(s)
- Hande Mefkure Ozkaya
- Department of Endocrinology and Metabolism, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul
| | - Muge Sayitoglu
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul
| | - Nil Comunoglu
- Department of Pathology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul
| | - Eda Sun
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul
| | - Fatma Ela Keskin
- Department of Endocrinology and Metabolism, Demiroglu Bilim University, Istanbul
| | - Duygu Ozata
- Department of Internal Medicine, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul
| | - Rabia Hacer Hocaoglu
- Department of Internal Medicine, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul
| | - Khusan Khodzaev
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul
| | - Sinem Firtina
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul
| | - Necmettin Tanriover
- Department of Neurosurgery, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul.,Pituitary Center, Istanbul University-Cerrahpasa, Istanbul
| | - Nurperi Gazioglu
- Department of Neurosurgery, Demiroglu Bilim University, Istanbul
| | - Buge Oz
- Department of Pathology, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul
| | - Pinar Kadioglu
- Department of Endocrinology and Metabolism, Cerrahpasa Medical School, Istanbul University-Cerrahpasa, Istanbul.,Pituitary Center, Istanbul University-Cerrahpasa, Istanbul
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8
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Khodzhaev K, Ng OH, Tugcu D, Erbilgin Y, Ng YY, Celkan T, Timur C, Karakas Z, Ozdemir GN, Yıldırmak Y, Sayitoglu M. High
TUBB2A
expression in childhood T‐ALL is correlated with the clinical outcome. Int J Lab Hematol 2020. [DOI: 10.1111/ijlh.13235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Khusan Khodzhaev
- Genetics Department Aziz Sancar Institute of Experimental Medicine Istanbul University Istanbul Turkey
- Istanbul University Institute of Health Sciences Istanbul Turkey
| | - Ozden Hatirnaz Ng
- Department of Medical Biology School of Medicine Acibadem Mehmet Ali Aydinlar University Istanbul Turkey
| | - Deniz Tugcu
- Pediatric Hematology Oncology Department Istanbul Faculty of Medicine Istanbul University Istanbul Turkey
| | - Yucel Erbilgin
- Genetics Department Aziz Sancar Institute of Experimental Medicine Istanbul University Istanbul Turkey
| | - Yuk Yin Ng
- Genetics and Bioengineering Department Istanbul Bilgi University Istanbul Turkey
| | - Tiraje Celkan
- Pediatric Hematology Oncology Department Istanbul University‐Cerrahpasa Faculty of Medicine Istanbul Turkey
| | - Cetin Timur
- Pediatric Hematology Oncology Department Seven Hill Hospital Istanbul Turkey
| | - Zeynep Karakas
- Pediatric Hematology Oncology Department Istanbul Faculty of Medicine Istanbul University Istanbul Turkey
| | - Gul Nihal Ozdemir
- Pediatric Hematology Oncology Department Istanbul University‐Cerrahpasa Faculty of Medicine Istanbul Turkey
- Pediatric Hematology Division Istanbul Kanuni Sultan Suleyman Education and Research Hospital Istanbul Turkey
| | - Yıldız Yıldırmak
- Pediatric Hematology Division Ministry of Health Sisli Etfal Education and Research Hospital Istanbul Turkey
| | - Muge Sayitoglu
- Genetics Department Aziz Sancar Institute of Experimental Medicine Istanbul University Istanbul Turkey
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9
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Yucesan E, Hatirnaz Ng O, Yalniz FF, Yilmaz H, Salihoglu A, Sudutan T, Eskazan AE, Ongoren S, Baslar Z, Soysal T, Ozbek U, Sayitoglu M, Ar MC. Copy-number variations in adult patients with chronic immune thrombocytopenia. Expert Rev Hematol 2020; 13:1277-1287. [PMID: 32885695 DOI: 10.1080/17474086.2020.1819786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVES Immune thrombocytopenia (ITP) is an autoimmune disease with heterogeneous background. FCGR2C mutations were defined in one third of the patients but genetic players have not been fully elucidated yet. Although childhood ITP present as benign, ITP in adulthood is chronic disease with treatment challenges. This study aimed to focus on adult ITP patients using a whole genome genotyping that is valuable approach to identify the responsible genomic regions for the disease. METHODS Herein 24 adult primary-refractory for ITP patients were evaluated using HumanCytoSNP12BeadChip,Illumina. Forty-six age and sex matched healthy individuals, and ptients awith nonhematological conditions were analyzed as controls. Identified CNV regions were verified by qRTPCR. T-cell receptor beta and delta (TCRB/TCRG) clonality were assessed by heteroduplex analysis in mosaic cases. RESULTS Several CNV losses and gains were defined (losses:2q,7q,17q,19p, and gains: 1q,2p,3q,4q,7q,10q,12p,13q,14q,15q,17p,20q,21p,22q,Xp). Mosaic changes of different sizes (0.2-17.77Mb) were identified in five patients and three of them showed clonality. CNV regions that were unique to ITP patients were identified for the first time and among these genes, those related to immune regulation, and cellular trafficking were noteworthy. Conclusion: Identified CNV regions harbor several candidate genes, the functions of which might shed light on the pathogenesis of chronic ITP.
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Affiliation(s)
- Emrah Yucesan
- Faculty of Medicine, Department of Medical Biology, Bezmialem Vakif University , Istanbul, Turkey
| | - Ozden Hatirnaz Ng
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University , Istanbul, Turkey
| | - Fevzi Firat Yalniz
- Cerrahpasa Faculty of Medicine, Division of Haematology, Department of Internal Medicine, Istanbul University-Cerrahpasa , Istanbul, Turkey
| | - Hulya Yilmaz
- Cerrahpasa Faculty of Medicine, Division of Haematology, Department of Internal Medicine, Istanbul University-Cerrahpasa , Istanbul, Turkey
| | - Ayse Salihoglu
- Cerrahpasa Faculty of Medicine, Division of Haematology, Department of Internal Medicine, Istanbul University-Cerrahpasa , Istanbul, Turkey
| | - Tugce Sudutan
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University , Istanbul, Turkey
| | - Ahmet Emre Eskazan
- Cerrahpasa Faculty of Medicine, Division of Haematology, Department of Internal Medicine, Istanbul University-Cerrahpasa , Istanbul, Turkey
| | - Seniz Ongoren
- Cerrahpasa Faculty of Medicine, Division of Haematology, Department of Internal Medicine, Istanbul University-Cerrahpasa , Istanbul, Turkey
| | - Zafer Baslar
- Cerrahpasa Faculty of Medicine, Division of Haematology, Department of Internal Medicine, Istanbul University-Cerrahpasa , Istanbul, Turkey
| | - Teoman Soysal
- Cerrahpasa Faculty of Medicine, Division of Haematology, Department of Internal Medicine, Istanbul University-Cerrahpasa , Istanbul, Turkey
| | - Ugur Ozbek
- Department of Medical Genetics, Acibadem Mehmet Ali Aydinlar University, School of Medicine , Istanbul, Turkey
| | - Muge Sayitoglu
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University , Istanbul, Turkey
| | - M Cem Ar
- Cerrahpasa Faculty of Medicine, Division of Haematology, Department of Internal Medicine, Istanbul University-Cerrahpasa , Istanbul, Turkey
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10
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Khodzhaev K, Bay SB, Kebudi R, Altindirek D, Kaya A, Erbilgin Y, Ng OH, Kiykim A, Erol FC, Zengin FS, Firtina S, Ng YY, Aksoy BA, Sayitoglu M. Lymphoma Predisposing Gene in an Extended Family: CD70 Signaling Defect. J Clin Immunol 2020; 40:883-892. [PMID: 32620996 DOI: 10.1007/s10875-020-00816-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 06/26/2020] [Indexed: 12/31/2022]
Abstract
Genome-wide sequencing studies in pediatric cancer cohorts indicate that about 10% of patients have germline mutations within cancer predisposition genes. Within this group, primary immune deficiencies take the priority regarding the vulnerability of the patients to infectious agents and the difficulties of cancer management. On the other hand, early recognition of these diseases may offer specific targeted therapies and hematopoietic stem cell transplantation as an option. Besides therapeutic benefits, early diagnosis will provide genetic counseling for the family members. Within this context, an extended family with multiple consanguineous marriages and affected individuals, who presented with combined immune deficiency (CID) and/or Hodgkin lymphoma phenotype, were examined by exome sequencing. A pathogenic homozygous missense CD70 variation was detected (NM_001252.5:c332C>T) in concordance with CD70 phenotype and familial segregation was confirmed. CD70 variations in patients with CID and malignancy have very rarely been reported. This paper reports extended family with multiple affected members with CID and malignancy carrying a missense CD70 variation, and reviews the rare cases reported in the literature. Primary immune deficiencies appear to be a potential cause for pediatric cancers. Better focusing on these inborn disorders to prevent or make an early diagnosis of malignant transformation and reduce mortalities is important.
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Affiliation(s)
- Khusan Khodzhaev
- Aziz Sancar Institute of Experimental Medicine, Genetics Department, Istanbul University, Istanbul, Turkey
- Institute of Health Sciences, Istanbul University, Istanbul, Turkey
| | - Sema Buyukkapu Bay
- Oncology Institute, Division of Pediatric Hematology-Oncology, Istanbul University, Istanbul, Turkey
| | - Rejin Kebudi
- Oncology Institute, Division of Pediatric Hematology-Oncology, Istanbul University, Istanbul, Turkey.
| | - Didem Altindirek
- Aziz Sancar Institute of Experimental Medicine, Genetics Department, Istanbul University, Istanbul, Turkey
- Institute of Health Sciences, Istanbul University, Istanbul, Turkey
| | - Aysenur Kaya
- Faculty of Medicine, Department of Pediatric Allergy Immunology, Istinye University, Istanbul, Turkey
| | - Yucel Erbilgin
- Aziz Sancar Institute of Experimental Medicine, Genetics Department, Istanbul University, Istanbul, Turkey
| | - Ozden Hatirnaz Ng
- Department of Medical Biology, Acıbadem Mehmet Ali Aydınlar University School of Medicine, Istanbul, Turkey
| | - Ayca Kiykim
- Faculty of Medicine, Division of Pediatric Allergy Immunology, Istanbul University Cerrahpasa, Istanbul, Turkey
| | - Funda Cipe Erol
- Faculty of Medicine, Department of Pediatric Allergy Immunology, Istinye University, Istanbul, Turkey
| | - Feride Sen Zengin
- Intensive Care Unit, Erzurum Education and Research Hospital, Erzurum, Turkey
| | - Sinem Firtina
- Faculty of Art and Science, Department of Molecular Biology and Genetics, Istinye University, Istanbul, Turkey
| | - Yuk Yin Ng
- Genetics and Bioengineering Department, Istanbul Bilgi University, Istanbul, Turkey
| | - Basak Adakli Aksoy
- Department of Pediatric Hematology Oncology, Altınbaş University, Istanbul, Turkey
| | - Muge Sayitoglu
- Aziz Sancar Institute of Experimental Medicine, Genetics Department, Istanbul University, Istanbul, Turkey
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11
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Firtina S, Yin Ng Y, Hatirnaz Ng O, Kiykim A, Aydiner E, Nepesov S, Camcioglu Y, Sayar EH, Reisli I, Torun SH, Cogurlu T, Uygun D, Simsek IE, Kaya A, Cipe F, Cagdas D, Yucel E, Cekic S, Uygun V, Baris S, Ozen A, Ozbek U, Sayitoglu M. Mutational landscape of severe combined immunodeficiency patients from Turkey. Int J Immunogenet 2020; 47:529-538. [PMID: 32445296 DOI: 10.1111/iji.12496] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 04/06/2020] [Accepted: 04/30/2020] [Indexed: 01/01/2023]
Abstract
Severe combined immunodeficiency (SCID) has a diverse genetic aetiology, where a clinical phenotype, caused by single and/or multiple gene variants, can give rise to multiple presentations. The advent of next-generation sequencing (NGS) has recently enabled rapid identification of the molecular aetiology of SCID, which is crucial for prognosis and treatment strategies. We sought to identify the genetic aetiology of various phenotypes of SCIDs and assessed both clinical and immunologic characteristics associated with gene variants. An amplicon-based targeted NGS panel, which contained 18 most common SCID-related genes, was contumely made to screen the patients (n = 38) with typical SCID, atypical SCID or OMENN syndrome. Allelic segregations were confirmed for the detected gene variants within the families. In total, 24 disease-causing variants (17 known and 7 novel) were identified in 23 patients in 9 different SCID genes: RAG1 (n = 5), RAG2 (n = 2), ADA (n = 3), DCLRE1C (n = 2), NHEJ1 (n = 2), CD3E (n = 2), IL2RG (n = 3), JAK3 (n = 4) and IL7R (n = 1). The overall success rate of our custom-made NGS panel was 60% (39.3% for NK+ SCID and 100% for NK- SCID). Incidence of autosomal-recessive inherited genes is more frequently found in our cohort than the previously reported populations probably due to the high consanguineous marriages in Turkey. In conclusion, the custom-made sequencing panel was able to identify and confirm the previously known and novel disease-causing variants with high accuracy.
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Affiliation(s)
- Sinem Firtina
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey.,Department of Molecular Biology and Genetics, Art and Science Faculty, Istinye University, Istanbul, Turkey
| | - Yuk Yin Ng
- Department of Genetics and Bioengineering, Istanbul Bilgi University, Istanbul, Turkey
| | - Ozden Hatirnaz Ng
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey.,Department of Medical Biology, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Ayca Kiykim
- Department of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey
| | - Elif Aydiner
- Department of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey
| | - Serdar Nepesov
- Department of Pediatric Allergy and Immunology, Medipol University, Istanbul, Turkey
| | - Yildiz Camcioglu
- Department of Infectious Diseases and Clinical Immunology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Esra H Sayar
- Department of Pediatric Immunology and Allergy, Meram Medical Faculty, Necmettin Erbakan University, Konya, Turkey
| | - Ismail Reisli
- Department of Pediatric Immunology and Allergy, Meram Medical Faculty, Necmettin Erbakan University, Konya, Turkey
| | - Selda H Torun
- Department of Clinical Immunology, Istanbul School of Medicine, Istanbul University, Istanbul, Turkey
| | - Tuba Cogurlu
- Department of Pediatric Allergy and Immunology, Kocaeli University, Kocaeli, Turkey
| | - Dilara Uygun
- Department of Pediatric Allergy and Immunology, Antalya Training and Research Hospital, Antalya, Turkey
| | - Isil E Simsek
- Department of Pediatric Allergy and Immunology, Kartal Dr. Lutfi Kirdar Training and Research Hospital, Istanbul, Turkey
| | - Aysenur Kaya
- Department of Pediatric Allergy and Immunology, Istinye University, Istanbul, Turkey
| | - Funda Cipe
- Department of Pediatric Allergy and Infection, Istanbul Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey
| | - Deniz Cagdas
- Department of Pediatric Immunology, Hacettepe School of Medicine, Hacettepe University, Ankara, Turkey
| | - Esra Yucel
- Department of Pediatric Allergy and Immunology, Istanbul School of Medicine, Istanbul University, Istanbul, Turkey
| | - Sukru Cekic
- Department of Pediatric Immunology, Uludag University School of Medicine, Bursa, Turkey
| | - Vedat Uygun
- Bone Marrow Transplantation Unit, Medical Park Hospital, Antalya, Turkey
| | - Safa Baris
- Department of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey
| | - Ahmet Ozen
- Department of Pediatric Allergy and Immunology, Marmara University, Istanbul, Turkey
| | - Ugur Ozbek
- Department of Medical Genetics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Muge Sayitoglu
- Department of Genetics, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
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12
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Erbilgin Y, Firtina S, Mercan S, Hatirnaz Ng O, Karaman S, Tasar O, Karakas Z, Celkan TT, Zengin E, Sarper N, Yildirmak ZY, Sisko S, Ozbek U, Sayitoglu M. Prognostic gene alterations and clonal changes in childhood B-ALL. Leuk Res 2019; 83:106159. [PMID: 31228652 DOI: 10.1016/j.leukres.2019.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/17/2019] [Accepted: 05/22/2019] [Indexed: 12/20/2022]
Abstract
Genomic profiles of leukemia patients lead to characterization of variations that provide the molecular classification of risk groups, prediction of clinical outcome and therapeutic decisions. In this study, we examined the diagnostic (n = 77) and relapsed (n = 31) pediatric B-cell acute lymphoblastic leukemia (B-ALL) samples for the most common leukemia-associated gene variations CRLF2, JAK2, PAX5 and IL7R using deep sequencing and copy number alterations (CNAs) (CDKN2A/2B, PAX5, RB1, BTG1, ETV6, CSF2RA, IL3RA and CRLF2) by multiplex ligation proximity assay (MLPA), and evaluated for the clonal changes through relapse. Single nucleotide variations SNVs were detected in 19% of diagnostic 15.3% of relapse samples. The CNAs were detected in 55% of diagnosed patients; most common affected genes were CDKN2A/2B, PAX5, and CRLF2. Relapse samples did not accumulate a greater number of CNAs or SNVs than the cohort of diagnostic samples, but the clonal dynamics showed the accumulation/disappearance of specific gene variations explained the course of relapse. The CDKN2A/2B were most frequently altered in relapse samples and 32% of relapse samples carried at least one CNA. Moreover, CDKN2A/2B alterations and/or JAK2 variations were associated with decreased relapse-free survival. On the other hand, CRLF2 copy number alterations predicted a better survival rate in B-ALL. These findings contribute to the knowledge of CDKN2A/2B and CRLF2 alterations and their prognostic value in B-ALL. The integration of genomic data in clinical practice will enable better stratification of ALL patients and allow deeper understanding of the nature of relapse.
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Affiliation(s)
- Yucel Erbilgin
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Sinem Firtina
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey; Istinye University, Faculty of Arts and Sciences, Istanbul, Turkey
| | - Sevcan Mercan
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey; Kafkas University, Faculty of Engineering, Kars, Turkey
| | - Ozden Hatirnaz Ng
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey; Acibadem Mehmet Ali Aydinlar University Medical Faculty, Istanbul, Turkey
| | - Serap Karaman
- Istanbul University, Aziz Sancar Institute of Experimental Medicine, Istanbul, Turkey
| | - Orcun Tasar
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Zeynep Karakas
- Istanbul University, Aziz Sancar Institute of Experimental Medicine, Istanbul, Turkey
| | | | - Emine Zengin
- Kocaeli University Medical Faculty, Kocaeli, Turkey
| | - Nazan Sarper
- Kocaeli University Medical Faculty, Kocaeli, Turkey
| | | | - Sinem Sisko
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Ugur Ozbek
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey; Acibadem Mehmet Ali Aydinlar University Medical Faculty, Istanbul, Turkey
| | - Muge Sayitoglu
- Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey.
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13
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Ozkaya HM, Comunoglu N, Sayitoglu M, Keskin FE, Firtina S, Khodzhaev K, Apaydin T, Gazioglu N, Tanriover N, Oz B, Kadioglu P. Germline mutations of aryl hydrocarbon receptor-interacting protein (AIP) gene and somatostatin receptor 1-5 and AIP immunostaining in patients with sporadic acromegaly with poor versus good response to somatostatin analogues. Pituitary 2018; 21:335-346. [PMID: 29455389 DOI: 10.1007/s11102-018-0876-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVE To determine aryl hydrocarbon interacting protein (AIP) gene variations and AIP and somatostatin receptor (SSTR) 1-5 immunostaining in patients with apparently sporadic acromegaly with poor versus good response to somatostatin analogues (SRLs). METHODS A total of 94 patients (66 with poor and 28 with good response to SRLs) were screened for the AIP gene variations using Sanger sequencing. Immunostaining was performed in 60 tumors. RESULTS Several variations, albeit some with undetermined significance, were detected, especially in poor responder patients. The prevalence of AIP mutation was 2.1% in the whole group and 1.5% in patients with poor response to SRLs. AIP, SSTR2A, and SSTR2B immunostainings were decreased in patients with poor response (p < 0.05 for all), and other SSTRs did not differ between the groups (p > 0.05 for all). Patients with low AIP had decreased levels of SSTR2A and SSTR3 (p < 0.05 for all). AIP and SSTR2A immunostainings were positively correlated to the treatment response and age at diagnosis was negatively correlated (p < 0.05 for all). In poor responder patients with high SSTR2A immunostaining, SSTR2B immunostaining and preoperative tumor size were positively and negatively correlated, respectively, to SRL response (p < 0.05 for all). CONCLUSIONS Lack of response to SRLs does not necessarily increase the risk of harboring AIP mutations. The finding of decreased AIP, SSTR2A, and SSTR2B immunostaining in patients with poor response to SRLs and decreased SSTR2A and SSTR3 level in those with low AIP immunostaining suggests a possible interaction between AIP and some SSTR subtypes that might alter SRL sensitivity.
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Affiliation(s)
- Hande Mefkure Ozkaya
- Department of Endocrinology and Metabolism, Cerrahpasa Medical School, Istanbul University, Cerrahpasa, 34303, Istanbul, Turkey
| | - Nil Comunoglu
- Department of Pathology, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey
| | - Muge Sayitoglu
- Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Fatma Ela Keskin
- Department of Endocrinology and Metabolism, Cerrahpasa Medical School, Istanbul University, Cerrahpasa, 34303, Istanbul, Turkey
| | - Sinem Firtina
- Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Khusan Khodzhaev
- Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Tugce Apaydin
- Department of Endocrinology and Metabolism, Cerrahpasa Medical School, Istanbul University, Cerrahpasa, 34303, Istanbul, Turkey
| | - Nurperi Gazioglu
- Department of Neurosurgery, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey
- Pituitary Center, Istanbul University, Istanbul, Turkey
| | - Necmettin Tanriover
- Department of Neurosurgery, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey
- Pituitary Center, Istanbul University, Istanbul, Turkey
| | - Buge Oz
- Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Pinar Kadioglu
- Department of Endocrinology and Metabolism, Cerrahpasa Medical School, Istanbul University, Cerrahpasa, 34303, Istanbul, Turkey.
- Pituitary Center, Istanbul University, Istanbul, Turkey.
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14
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Erbilgin Y, Eskazan AE, Hatirnaz Ng O, Salihoglu A, Elverdi T, Firtina S, Tasar O, Mercan S, Sisko S, Khodzhaev K, Ongoren S, Ar MC, Baslar Z, Soysal T, Sayitoglu M, Ozbek U. Deep sequencing of BCR-ABL1 kinase domain mutations in chronic myeloid leukemia patients with resistance to tyrosine kinase inhibitors. Leuk Lymphoma 2018; 60:200-207. [PMID: 29965782 DOI: 10.1080/10428194.2018.1473573] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Tyrosine kinase inhibitor (TKI) therapy is the current treatment of choice for patients with chronic phase chronic myeloid leukemia (CML) leading to rapid and durable hematological as well as molecular responses. However, emergence of resistance to TKIs has been the major obstacle to treatment success on long term. In this regard kinase domain mutations are the most common mechanism of therapy failure. In this study, we analyzed peripheral blood samples from 17 CML patients who had developed resistance to various TKIs by using next-generation sequencing parallel to Sanger sequencing. BCR-ABL1 kinase domain mutations have been found in 59% of the cohort. Our results demonstrate that next-generation sequencing results in a higher mutational detection rate than reported with conventional sequencing methodology. Furthermore, it showed the clonal diversity more accurately.
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Affiliation(s)
- Yucel Erbilgin
- a Aziz Sancar Institute of Experimental Medicine Department of Genetics , Istanbul University , Istanbul , Turkey
| | - Ahmet Emre Eskazan
- b Division of Haematology, Department of Internal Medicine, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
| | - Ozden Hatirnaz Ng
- a Aziz Sancar Institute of Experimental Medicine Department of Genetics , Istanbul University , Istanbul , Turkey
| | - Ayse Salihoglu
- b Division of Haematology, Department of Internal Medicine, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
| | - Tugrul Elverdi
- b Division of Haematology, Department of Internal Medicine, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
| | - Sinem Firtina
- a Aziz Sancar Institute of Experimental Medicine Department of Genetics , Istanbul University , Istanbul , Turkey
| | - Orcun Tasar
- a Aziz Sancar Institute of Experimental Medicine Department of Genetics , Istanbul University , Istanbul , Turkey
| | - Sevcan Mercan
- a Aziz Sancar Institute of Experimental Medicine Department of Genetics , Istanbul University , Istanbul , Turkey
| | - Sinem Sisko
- a Aziz Sancar Institute of Experimental Medicine Department of Genetics , Istanbul University , Istanbul , Turkey
| | - Khusan Khodzhaev
- a Aziz Sancar Institute of Experimental Medicine Department of Genetics , Istanbul University , Istanbul , Turkey
| | - Seniz Ongoren
- b Division of Haematology, Department of Internal Medicine, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
| | - Muhlis Cem Ar
- b Division of Haematology, Department of Internal Medicine, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
| | - Zafer Baslar
- b Division of Haematology, Department of Internal Medicine, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
| | - Teoman Soysal
- b Division of Haematology, Department of Internal Medicine, Cerrahpasa Faculty of Medicine , Istanbul University , Istanbul , Turkey
| | - Muge Sayitoglu
- a Aziz Sancar Institute of Experimental Medicine Department of Genetics , Istanbul University , Istanbul , Turkey
| | - Ugur Ozbek
- a Aziz Sancar Institute of Experimental Medicine Department of Genetics , Istanbul University , Istanbul , Turkey.,c Department of Medical Genetics, School of Medicine , Acıbadem Mehmet Ali Aydınlar University , Istanbul , Turkey
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15
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Niyazoglu M, Sayitoglu M, Firtina S, Hatipoglu E, Gazioglu N, Kadioglu P. Familial acromegaly due to aryl hydrocarbon receptor-interacting protein (AIP) gene mutation in a Turkish cohort. Pituitary 2014; 17:220-6. [PMID: 23743763 DOI: 10.1007/s11102-013-0493-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aryl hydrocarbon receptor-interacting protein (AIP) is associated with 15-20% of familial isolated pituitary adenomas and 50-80% of cases with AIP mutation exhibit a somatotropinoma. Herein we report clinical characteristics of a large family where AIP R304X variants have been identified. AIP mutation analysis was performed on a large (n = 52) Turkish family across six generations. Sella MRIs of 30 family members were obtained. Basal pituitary hormone levels were evaluated in 13 family members harboring an AIP mutation. Thirteen of 52 family members (25%) were found to have a heterozygous nonsense germline R304X mutation in the AIP gene. Seven of the 13 mutation carriers (53.8%) had current or previous history of pituitary adenoma. Of these 7 mutation carriers, all but one had somatotropinoma/somatolactotropinoma (85.7% of the pituitary adenomas). Of the 6 acromegaly patients with AIP mutation (F/M: 3/3) the mean age at diagnosis of acromegaly was 32 ± 10.3 years while the mean age of symptom onset was 24.8 ± 9.9 years. Three of the six (50%) acromegaly cases with AIP mutation within the family presented with a macroadenoma and none presented with gigantism. Biochemical disease control was achieved in 66.6% (4/6) of the mutation carriers with acromegaly after a mean follow-up period of 18.6 ± 17.6 years. Common phenotypic characteristics of familial pituitary adenoma or somatotropinoma due to AIP mutation vary between families or even between individuals within a family.
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Affiliation(s)
- Mutlu Niyazoglu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
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16
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Oztopcu-Vatan P, Sayitoglu M, Gunindi M, Inan E. Cytotoxic and apoptotic effects of menadione on rat hepatocellular carcinoma cells. Cytotechnology 2014; 67:1003-9. [PMID: 24828824 DOI: 10.1007/s10616-014-9739-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 05/03/2014] [Indexed: 11/27/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most common cancers, which may lead to death. Menadione shows cytotoxic activity thought affecting redox cycling in cancer cells. The aim of the present study was to investigate the effects of menadione on rat hepatocellular carcinoma (H4IIE) cell morphology, cytotoxicity, apoptosis and DNA damage or repair in vitro. Cell morphology evaluated by microscopy and cell viability was determined using the 3-[4,5-dimethylthiazol-2yl]-diphenyltetrazolium bromide test. Apoptotic cell death was assessed in H4IIE cells treated with menadione by 4',6-diamidino-2-phenylindole staining. Quantitative real time polymerase chain reaction used to determine the expression level of poly (ADP-ribose) polymerase 1 (PARP1) gene. According to the results of this study menadione has got a cytotoxic activity (IC50 25 µM) and change the cell fate in H4IIE cells. Menadione treatments lead to PARP1 activation in a dose dependent manner and induce DNA damage and apoptosis, and this may suggest its use as a therapeutic agent in HCC treatment.
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Affiliation(s)
- Pinar Oztopcu-Vatan
- Department of Biology, Faculty of Arts and Sciences, Osmangazi University, Eskisehir, Turkey.
| | - Muge Sayitoglu
- Genetics Department, Institute for Experimental Medicine Research, Istanbul University, Istanbul, Turkey
| | - Melek Gunindi
- Graduate School of Natural and Applied Sciences, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Emine Inan
- Graduate School of Natural and Applied Sciences, Eskisehir Osmangazi University, Eskisehir, Turkey
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17
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Ng OH, Erbilgin Y, Firtina S, Celkan T, Karakas Z, Aydogan G, Turkkan E, Yildirmak Y, Timur C, Zengin E, van Dongen JJM, Staal FJT, Ozbek U, Sayitoglu M. Deregulated WNT signaling in childhood T-cell acute lymphoblastic leukemia. Blood Cancer J 2014; 4:e192. [PMID: 24632884 PMCID: PMC3972698 DOI: 10.1038/bcj.2014.12] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 12/16/2013] [Accepted: 12/27/2013] [Indexed: 12/29/2022] Open
Abstract
WNT signaling has been implicated in the regulation of hematopoietic stem cells and plays an important role during T-cell development in thymus. Here we investigated WNT pathway activation in childhood T-cell acute lymphoblastic leukemia (T-ALL) patients. To evaluate the potential role of WNT signaling in T-cell leukomogenesis, we performed expression analysis of key components of WNT pathway. More than 85% of the childhood T-ALL patients showed upregulated β-catenin expression at the protein level compared with normal human thymocytes. The impact of this upregulation was reflected in high expression of known target genes (AXIN2, c-MYC, TCF1 and LEF). Especially AXIN2, the universal target gene of WNT pathway, was upregulated at both mRNA and protein levels in ∼40% of the patients. When β-CATENIN gene was silenced by small interfering RNA, the cancer cells showed higher rates of apoptosis. These results demonstrate that abnormal WNT signaling activation occurs in a significant fraction of human T-ALL cases independent of known T-ALL risk factors. We conclude that deregulated WNT signaling is a novel oncogenic event in childhood T-ALL.
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Affiliation(s)
- O H Ng
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Y Erbilgin
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - S Firtina
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - T Celkan
- Department of Pediatrics Hematology, Cerrahpasa Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Z Karakas
- Department of Pediatric Hematology, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | - G Aydogan
- Pediatric Hematology Division, Istanbul Kanuni Sultan Suleyman Education and Research Hospital, Istanbul, Turkey
| | - E Turkkan
- Pediatric Hematology Division, Istanbul Okmeydani Education and Research Hospital, Istanbul, Turkey
| | - Y Yildirmak
- Pediatric Hematology Division, Ministry of Health Sisli Etfal Education and Research Hospital, Istanbul, Turkey
| | - C Timur
- Pediatric Hematology Division, Medeniyet University Medical Faculty, Istanbul, Turkey
| | - E Zengin
- Pediatric Hematology Division, Kocaeli University Medical Faculty, Kocaeli, Turkey
| | - J J M van Dongen
- Department of Immunology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - F J T Staal
- 1] Department of Immunology, Erasmus Medical Center, Rotterdam, The Netherlands [2] Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - U Ozbek
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - M Sayitoglu
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
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18
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Can I, Aysan E, Yucesan E, Sayitoglu M, Ozbek U, Ercivan M, Atasoy H, Buyukpinarbasili N, Muslumanoglu M. Parathyroid allotransplantation in rabbits without cultivation. Int J Clin Exp Med 2014; 7:280-284. [PMID: 24482717 PMCID: PMC3902269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 11/22/2013] [Indexed: 06/03/2023]
Abstract
Permanent hypoparathyroidism is a serious clinical situation. Allotransplantation of the parathyroid cells is relatively new approach to treatment. Non-cultivated allotransplantation in rabbits is not tried before. In this research parathyroidectomy was performed in six female New Zealand white rabbits. After division of surgically removed tissues into two, cryopreservation after cell isolation was done. Non-cultivated cross allotransplantation was performed under immunosuppression. Serum calcium and phosphorus levels were observed 15 days and histopathological analyses of the transplanted parathyroid tissues were studied. Significant changes in serum calcium and phosphorus levels during the experiment were observed (p=0.001 for both). Calcium levels which were significantly dropped to 6.66±0.7 mg/dL after parathyroidectomy and progressively increased up to 15.98±1.25 mg/dL at the end of the experiment (p=0.004). Phosphorus levels which were increased to 9.38±0.63 mg/dL after parathyroidectomy and stabilized to 4.46±1.06 mg/dL at the end of the experiment (p=0.007). All allotransplanted parathyroid tissues showed normal tissue architecture without evidence of cellular rejection. In conclusion allotransplantation of the parathyroid tissues without cultivation may be considered as an alternative and safe approach for the treatment of permanent hypoparathyroidism.
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Affiliation(s)
- Ismail Can
- Institute for Experimental Medical Research, Istanbul UniversityIstanbul, Turkey
| | - Erhan Aysan
- Department of General Surgery, Bezmialem Vakif UniversityIstanbul, Turkey
| | - Emrah Yucesan
- Institute for Experimental Medical Research, Istanbul UniversityIstanbul, Turkey
| | - Muge Sayitoglu
- Institute for Experimental Medical Research, Istanbul UniversityIstanbul, Turkey
| | - Ugur Ozbek
- Institute for Experimental Medical Research, Istanbul UniversityIstanbul, Turkey
| | - Merve Ercivan
- Department of General Surgery, Bezmialem Vakif UniversityIstanbul, Turkey
| | - Hakan Atasoy
- Department of General Surgery, Bezmialem Vakif UniversityIstanbul, Turkey
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19
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Bebek N, Özdemir Ö, Sayitoglu M, Hatırnaz O, Baykan B, Gürses C, Sencer A, Karasu A, Tüzün E, Üzün I, Akat S, Cine N, Sargin Kurt G, Imer M, Ozbek U, Canbolat A, Gökyigit A. Expression analysis and clinical correlation of aquaporin 1 and 4 genes in human hippocampal sclerosis. J Clin Neurosci 2013; 20:1564-70. [PMID: 23928039 DOI: 10.1016/j.jocn.2012.12.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 11/28/2012] [Accepted: 12/02/2012] [Indexed: 01/26/2023]
Abstract
Mesial temporal sclerosis (MTS) is the most frequent cause of drug resistant symptomatic partial epilepsy. The mechanism and genetic background of this unique pathology are not well understood. Aquaporins (AQP) are regulators of water homeostasis in the brain and are expressed in the human hippocampus. We explored the role of AQP genes in the pathogenetic mechanisms of MTS through an evaluation of gene expression in surgically removed human brain tissue. We analyzed AQP1 and 4 mRNA levels by quantitative real-time polymerase chain reaction and normalized to ABL and cyclophilin genes, followed by immunohistochemistry for AQP4. Relative expressions were calculated according to the delta Ct method and the results were compared using the Mann-Whitney U test. Brain specimens of 23 patients with epilepsy who had undergone surgery for MTS and seven control autopsy specimens were investigated. Clinical findings were concordant with previous studies and 61% of the patients were seizure-free in the postoperative period. AQP1 and 4 gene expression levels did not differ between MTS patients and control groups. Immunofluorescence analysis of AQP4 supported the expression results, showing no difference. Previous studies have reported contradictory results about the expression levels of AQP in MTS. To our knowledge, only one study has suggested upregulation whereas the other indicated downregulation of perivascular AQP4. Our study did not support these findings and may rule out the involvement of AQP in human MTS.
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Affiliation(s)
- N Bebek
- Neurology Department, Istanbul Faculty of Medicine, Millet cad., 34390 Capa, Istanbul, Turkey; Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey.
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20
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Uz B, Tatonyan SC, Sayitoglu M, Erbilgin Y, Ng OH, Buyukasik Y, Sayinalp N, Aksu S, Goker H, Ozcebe OI, Ozbek U, Haznedaroglu IC. Local hematopoietic renin-angiotensin system in myeloid versus lymphoid hematological neoplastic disorders. J Renin Angiotensin Aldosterone Syst 2012; 14:308-14. [DOI: 10.1177/1470320312464677] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Burak Uz
- Hacettepe University, Department of Internal Medicine, Hematology Unit, Turkey
| | - Suzin Catal Tatonyan
- Istanbul University, Institute for Experimental Medicine Research, Genetics Department, Turkey
| | - Muge Sayitoglu
- Istanbul University, Institute for Experimental Medicine Research, Genetics Department, Turkey
| | - Yucel Erbilgin
- Istanbul University, Institute for Experimental Medicine Research, Genetics Department, Turkey
| | - Ozden Hatirnaz Ng
- Istanbul University, Institute for Experimental Medicine Research, Genetics Department, Turkey
| | - Yahya Buyukasik
- Hacettepe University, Department of Internal Medicine, Hematology Unit, Turkey
| | - Nilgun Sayinalp
- Hacettepe University, Department of Internal Medicine, Hematology Unit, Turkey
| | - Salih Aksu
- Hacettepe University, Department of Internal Medicine, Hematology Unit, Turkey
| | - Hakan Goker
- Hacettepe University, Department of Internal Medicine, Hematology Unit, Turkey
| | - Osman I Ozcebe
- Hacettepe University, Department of Internal Medicine, Hematology Unit, Turkey
| | - Ugur Ozbek
- Istanbul University, Institute for Experimental Medicine Research, Genetics Department, Turkey
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21
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Hannon MM, Lohan F, Erbilgin Y, Sayitoglu M, O'Hagan K, Mills K, Ozbek U, Keeshan K. Elevated TRIB2 with NOTCH1 activation in paediatric/adult T-ALL. Br J Haematol 2012; 158:626-34. [PMID: 22775572 DOI: 10.1111/j.1365-2141.2012.09222.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Accepted: 05/17/2012] [Indexed: 01/22/2023]
Abstract
TRIB2 is a potent oncogene, elevated in a subset of human acute myeloid leukaemias (AML) with a mixed myeloid/lymphoid phenotype and NOTCH1 mutations. Although rare in AML, activating NOTCH1 mutations occur in 50% of all T cell acute lymphoblastic leukaemias (T-ALL). TRIB2 is a NOTCH1 target gene that functions in the degradation of key proteins and modulation of MAPK signalling pathways, implicated in haematopoietic cell survival and proliferation. This study showed that TRIB2 expression level is highest in the lymphoid compartment of normal haematopoietic cells, specifically in T cells. Analysis of TRIB2 expression across 16 different subtypes of human leukaemia demonstrated that TRIB2 expression was higher in ALL phenotypes versus all other phenotypes including AML, chronic lymphocytic leukaemia (CLL), myelodysplastic syndrome (MDS) and chronic myeloid leukaemia (CML). A T cell profile was distinguished by high TRIB2 expression in normal and malignant haematopoiesis. High TRIB2 expression was seen in T-ALL with normal karyotype and correlated with NOTCH signalling pathways. High TRIB2 expression correlated with NOTCH1/FBXW7 mutations in a paediatric T-ALL cohort, strongly linking NOTCH1 activation and high TRIB2 expression in paediatric T-ALL. The relationship between TRIB2 and T cell signalling pathways uniquely identifies leukaemia subtypes and will be useful in the advancement of our understanding of T cell and ALL biology.
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Affiliation(s)
- Maura M Hannon
- Department of Biochemsitry, Biosciences Institute, University College Cork, Cork, Ireland
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22
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Firtina S, Sayitoglu M, Hatirnaz O, Erbilgin Y, Oztunc C, Cinar S, Yildiz I, Celkan T, Anak S, Unuvar A, Devecioglu O, Timur C, Aydogan G, Akcay A, Atay D, Turkkan E, Karaman S, Orhaner B, Sarper N, Deniz G, Ozbek U. Evaluation of PAX5 gene in the early stages of leukemic B cells in the childhood B cell acute lymphoblastic leukemia. Leuk Res 2012; 36:87-92. [DOI: 10.1016/j.leukres.2011.07.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 06/28/2011] [Accepted: 07/10/2011] [Indexed: 01/17/2023]
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Erbilgin Y, Sayitoglu M, Hatirnaz O, Dogru O, Akcay A, Tuysuz G, Celkan T, Aydogan G, Salcioglu Z, Timur C, Yuksel-Soycan L, Ure U, Anak S, Agaoglu L, Devecioglu O, Yildiz I, Ozbek U. Prognostic significance of NOTCH1 and FBXW7 mutations in pediatric T-ALL. Dis Markers 2010; 28:353-60. [PMID: 20683149 PMCID: PMC3833232 DOI: 10.3233/dma-2010-0715] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The NOTCH signaling pathway plays important role in the development of multicellular organisms, as it regulates cell proliferation, survival, and differentiation. In adults, it is essential for the T- or B-lymphocyte lineage commitment. NOTCH1 and FBXW7 mutations both lead the activation of the NOTCH1 pathway and are found in the majority of T-ALL patients. In this study, the mutation analysis of NOTCH1 and FBXW7 genes was performed in 87 pediatric T-ALLs who were treated on the ALL-BFM protocols. In 19 patients (22%), activating NOTCH1 mutations were observed either in the heterodimerization domain or in the PEST domain and 7 cases (10%) demonstrated FBXW7 mutations (2 cases had both NOTCH1 and FBXW7 mutations). We also analyzed the relationship of the mutation data between the clinical and biological data of the patients. NOTCH1 and FBXW7, NOTCH1 alone were found correlated with lower initial leucocyte counts which was independent from the sex and T- cell immunophenotype. However, NOTCH1 and FBXW7 mutations were not predictive of outcome in the overall cohort of pediatric T-ALLs.
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Affiliation(s)
- Yucel Erbilgin
- Institute of Experimental Medicine, Department of Genetics, Istanbul University, Istanbul, Turkey
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25
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Sayitoglu M, Haznedaroğlu IC, Hatirnaz O, Erbilgin Y, Aksu S, Koca E, Adiguzel C, Bayik M, Akalin I, Gülbas Z, Akay M, Unal A, Kaynar L, Ovali E, Yilmaz M, Yenerel M, Dagdas S, Ozet G, Ar C, Aydin Y, Soysal T, Durgun B, Ozcebe O, Tukun A, Ilhan O, Ozbek U. Effects of Imatinib Mesylate on Renin–Angiotensin System (RAS) Activity during the Clinical Course of Chronic Myeloid Leukaemia. J Int Med Res 2009; 37:1018-28. [DOI: 10.1177/147323000903700406] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
The renin–angiotensin system (RAS) is involved in cell growth, proliferation and differentiation in bone marrow in an autocrine–paracrine manner, and it modulates normal and neoplastic haematopoietic cell proliferation. This study aimed to assess expressions of the RAS components, renin, angiotensinogen and angiotensin-converting enzyme (ACE), during imatinib mesylate treatment of patients with chronic myeloid leukaemia (CML). Expressions of RAS components were studied in patients with CML at the time of diagnosis ( n = 83) and at 3, 6 and 12 months after diagnosis ( n = 35) by quantitative real-time polymerase chain reaction. De novo CML patients had increased ACE, angiotensinogen and renin mRNA levels and these expression levels decreased following administration of imatinib. The RAS activities were significantly different among Sokal risk groups of CML, highlighting the altered biological activity of RAS in neoplastic disorders. The results of this study confirm that haematopoietic RAS affects neoplastic cell production, which may be altered via administration of tyrosine kinase inhibitors such as imatinib mesylate.
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Affiliation(s)
- M Sayitoglu
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - IC Haznedaroğlu
- Department of Internal Medicine, Haematology Division, Hacettepe University Medical Faculty, Ankara, Turkey
| | - O Hatirnaz
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - Y Erbilgin
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
| | - S Aksu
- Department of Internal Medicine, Haematology Division, Hacettepe University Medical Faculty, Ankara, Turkey
| | - E Koca
- Department of Internal Medicine, Haematology Division, Hacettepe University Medical Faculty, Ankara, Turkey
| | - C Adiguzel
- Department of Internal Medicine, Haematology Division, Marmara University Medical Faculty, Istanbul, Turkey
| | - M Bayik
- Department of Internal Medicine, Haematology Division, Marmara School of Medicine Hospital, Istanbul, Turkey
| | - I Akalin
- Department of Internal Medicine, Haematology Division, Marmara University Medical Faculty, Istanbul, Turkey
| | | | | | - A Unal
- Department of Internal Medicine, Haematology Division, Osmangazi University Medical Faculty, Eskisehir, Turkey
| | - L Kaynar
- Department of Internal Medicine, Haematology Division, Osmangazi University Medical Faculty, Eskisehir, Turkey
| | - E Ovali
- Department of Internal Medicine, Haematology Division, Erciyes University Medical Faculty, Kayseri, Turkey
| | - M Yilmaz
- Department of Internal Medicine, Haematology Division, Erciyes University Medical Faculty, Kayseri, Turkey
| | - M Yenerel
- Department of Internal Medicine, Haematology Division, Karadeniz Technical University Medical Faculty, Trabzon, Turkey
| | - S Dagdas
- Department of Internal Medicine, Haematology Division, Istanbul University Medical Faculty, Istanbul, Turkey
| | - G Ozet
- Department of Internal Medicine, Haematology Division, Istanbul University Medical Faculty, Istanbul, Turkey
| | - C Ar
- Department of Internal Medicine, Haematology Division, Ankara Numune Hospital, Ankara, Turkey
| | - Y Aydin
- Department of Internal Medicine, Haematology Division, Ankara Numune Hospital, Ankara, Turkey
| | - T Soysal
- Department of Internal Medicine, Haematology Division, Ankara Numune Hospital, Ankara, Turkey
| | - B Durgun
- Department of Internal Medicine, Haematology Division, Istanbul University Cerrahpaşa Medical Faculty, Istanbul, Turkey
| | - O Ozcebe
- Department of Internal Medicine, Haematology Division, Hacettepe University Medical Faculty, Ankara, Turkey
| | - A Tukun
- Medical Department, Novartis Oncology Turkey, Istanbul, Turkey
| | - O Ilhan
- Department of Internal Medicine, Genetics Division, Ankara University Medical Faculty, Ankara, Turkey
| | - U Ozbek
- Department of Genetics, Institute for Experimental Medicine, Istanbul University, Istanbul, Turkey
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26
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Saka B, Dogan O, Tascioglu C, Besisik SK, Karan MA, Sayitoglu M, Erten N, Genc S. A068 Bone Marrow Renin-Angiotensin System in Multiple Myeloma. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/s1557-9190(11)70448-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Abstract
Aromatase (P450AROM) converts testosterone to estrogen. This conversion could be important in normal physiology and estradiol-induced tumorigenesis in human pituitary. The objective of this study was to examine the expression of P450AROM in normal human pituitary and determine the gender difference. We examined aromatase expression in 19 normal human pituitary glands [13 males, 6 females, median age: 30 years (interquartile ranges, IQR: 23-63)] obtained from autopsy. We demonstrated aromatase gene expression levels by quantitative RT-PCR and aromatase protein with immunohistochemical staining in normal male and female human pituitary. Although median relative expression level of aromatase mRNA of male individuals [median DeltaCt = 42.6 (IQR: 7.6-93.9)] was higher than the female individuals [median DeltaCt = 3.9 (IQR:0-44.8)], we could not determine a significant gender difference in aromatase mRNA levels (p = 0.2). The difference between the aromatase protein density by immunohistochemistry was not significant between genders (p = 0.78). The aromatase levels were also not correlated with the age of the study subjects (p = 0.42 r = -0.21). The results indicate that aromatase enzyme is present in human pituitary. The amount and the density of the enzyme show a large variance among different individuals. Although higher mRNA expression was observed in male pituitary compared to female pituitary, there was no statistically significant difference for gender or age.
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Affiliation(s)
- Pinar Kadioglu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, University of Istanbul, Cerrahpasa, Istanbul 34303, Turkey.
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