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Uner M, Saglam A, Tukun A, Aydın B, Akyol A, Uner A. Diffuse Large B-Cell Lymphoma, Epstein-Barr Virus -Positive Kappa Monotypic Plasma Cell Proliferation and Invasive Carcinoma, Developing in a Child With Defective Mismatch Repair. Pediatr Dev Pathol 2022; 25:339-344. [PMID: 35227120 DOI: 10.1177/10935266221075605] [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] [Indexed: 11/16/2022]
Abstract
Constitutional mismatch repair deficiency (CMMRD) syndrome is characterized by biallelic mutations in a mismatch repair gene and is associated with development of childhood cancers and symptoms resembling neurofibromatosis type 1, like café-au-lait spots. We describe the extremely rare case of a 12-year-old male presenting with several light brown macular lesions on the skin, gastrointestinal diffuse large B-cell lymphoma, adenomatous polyposis throughout the gastrointestinal tract and an intra-abdominal invasive carcinoma derived from upper gastrointestinal system. All neoplasia, as well as normal tissues, showed loss of Msh6 expression with immunohistochemistry. Molecular studies showed pathogenic homozygous p.F1088Sfs*2 mutation in MSH6. Furthermore, signs consistent with immunodeficiency, namely decreased levels of IgG and IgA in the serum, nodular lymphoid hyperplasia and EBV-associated plasma cell proliferation with monotypic kappa light chain expression in the ileum, were also noted. Our case depicts the phenotypic diversity of CMMRD syndrome and emphasizes its association with immunodeficiency, raising awareness to a feature not widely recognized.
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Affiliation(s)
- Meral Uner
- Department of Pathology, Medical School, 64005Hacettepe University, Ankara, Turkey
| | - Arzu Saglam
- Department of Pathology, Medical School, 64005Hacettepe University, Ankara, Turkey
| | - Ajlan Tukun
- Department of Medical Genetics, Düzen Laboratories Group, Ankara, Turkey
| | - Burca Aydın
- Department of Pediatric Oncology, Hacettepe Cancer Institute, Ankara, Turkey
| | - Aytekin Akyol
- Department of Pathology, Medical School, 64005Hacettepe University, Ankara, Turkey
| | - Aysegul Uner
- Department of Pathology, Medical School, 64005Hacettepe University, Ankara, Turkey
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2
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Kılavuz S, Basaranoglu M, Epcacan S, Bako D, Ozer A, Donmez YN, Ceylan EI, Tukun A, Ceylaner S, Geylani H, Mungan HNO. A rare cause of hydrops fetalis in two Gaucher disease type 2 patients with a novel mutation. Metab Brain Dis 2022; 37:1283-1287. [PMID: 35254599 DOI: 10.1007/s11011-022-00942-5] [Citation(s) in RCA: 1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 02/22/2022] [Indexed: 01/30/2023]
Abstract
Gaucher disease type 2 is the most progressive and the rarest form of Gaucher disease, defined as the acute neuronopathic type. We presented two GD2 patients who died before three months of age due to severe septicemia, respiratory and liver failure. One was homozygous for a novel GBA variant c.590 T > A (p.197 K), and the second homozygous for the known GBA mutation c.1505G > A (p.R502H). Ichthyosis, hydrops fetalis, apnea, myoclonic seizures, and hepatosplenomegaly occurred in both patients, but hypertrophic cardiomyopathy was observed only in the second and unilateral cataract in the first patient. Due to the disease's early and rapid neurological progression, we did not administer ERT to our patients. It is strongly believed that early diagnosis is essential, and prenatal diagnosis makes genetic counselling possible for future pregnancies.
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Affiliation(s)
- Sebile Kılavuz
- Division of Pediatric Metabolism and Nutrition, Department of Pediatrics, Van Training and Research Hospital, University of Health Sciences, Van, Turkey.
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK.
| | - Murat Basaranoglu
- Division of Neonatology, Department of Pediatrics, University of Health Sciences, Van Training and Research Hospital, Van, Turkey
| | - Serdar Epcacan
- Division of Pediatric Cardiology Disease, Department of Pediatrics, University of Health Sciences, Van Training and Research Hospital, Van, Turkey
| | - Derya Bako
- Divisions of Pediatric Radiology, Department of Radiology, University of Health Sciences, Van Training and Research Hospital, Van, Turkey
| | - Arife Ozer
- Division of Pediatric Infectious Disease, Department of Pediatrics, University of Health Sciences, Van Training and Research Hospital, Van, Turkey
| | - Yasemin Nuran Donmez
- Division of Pediatric Cardiology Disease, Department of Pediatrics, University of Health Sciences, Van Training and Research Hospital, Van, Turkey
| | - Emine Ipek Ceylan
- Department of Medical Genetics, University of Health Sciences, Van Training and Research Hospital, Van, Turkey
| | - Ajlan Tukun
- Department of Medical Genetics, Duzen Laboratory, Ankara, Turkey
| | - Serdar Ceylaner
- Intergen Genetic Diagnosis and Research Center, Ankara, Turkey
- Department of Medical Genetics, Medical Faculty, Lokman Hekim University, Ankara, Turkey
| | - Hadi Geylani
- Division of Pediatric Hematology, Department of Pediatrics, University of Health Sciences, Van Training and Research Hospital, Van, Turkey
| | - Halise Neslihan Onenli Mungan
- Division of Pediatric Metabolism and Nutrition, Department of Pediatrics, Çukurova University Faculty of Medicine, Adana, Turkey
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Yetim E, Topcuoglu MA, Yurur Kutlay N, Tukun A, Oguz KK, Arsava EM. Abstract TMP57: The Influence of Telomere Length on Ischemic Stroke Risk and Phenotype. Stroke 2020. [DOI: 10.1161/str.51.suppl_1.tmp57] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Telomeres are specific nucleotide repeats that play a central role in control of DNA damage related to cell division and aging. The degree of telomere shortening that occurs as part of aging is associated with age-related non-cancer diseases like hypertension, diabetes mellitus and coronary artery disease. Although a number of studies have highlighted that a similar relationship might exist with ischemic stroke, contradictory reports are also present in the literature. In this study we investigated the association between telomere length and ischemic stroke, not only in terms of stroke risk in general, but also from the perspective of stroke etiology and severity.
Methods:
In a Caucasian cohort, telomere length was determined by Southern blot from peripheral blood leukocytes in 163 consecutive ischemic stroke patients, and 210 controls without any prior history of ischemic stroke. Univariate and multivariate analyses were performed to determine the contribution of telomere length to stroke risk, stroke etiology, admission NIHSS score and DWI lesion volume.
Results:
The median (interquartile range) telomere length was 7.0 (5.5-9.0) kb in the overall population. Expectedly, telomere length was negatively correlated with aging (r=-0.23; p<0.001). A short telomere length (i.e. lowest quartile; ≤5.5 kb) was significantly associated with ischemic stroke (OR 3.0, 95%CI 1.8-5.1) when adjusted for age, gender and cardiovascular risk factors. This significant relationship persisted for all stroke etiologies, except for other rare causes of stroke. There was no significant relationship between admission lesion volume and telomere length; however, patients with short telomeres presented with more severe strokes (NIHSS score ≥16) when adjusted for age, risk factors, stroke etiology and infarct volume (OR 7.0; 95%CI 1.7-28.7).
Conclusion:
Almost all etiologic subtypes of ischemic stroke are related to shortened telomere length, irrespective of the age of the subject. Furthermore, presence of short telomeres negatively influences the tolerance of brain to ischemia, thereby causing more severe clinical phenotypes in these patients in the setting of ischemic stroke.
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Affiliation(s)
- Ezgi Yetim
- Neurology, Hacettepe Univ, Ankara, Turkey
| | | | | | - Ajlan Tukun
- Div of Med Genetics, Düzen Laboratories Group, Ankara, Turkey
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Atik T, Aykut A, Hazan F, Onay H, Goksen D, Darcan S, Tukun A, Ozkinay F. Mutation Spectrum and Phenotypic Features in Noonan Syndrome with PTPN11 Mutations: Definition of Two Novel Mutations. Indian J Pediatr 2016; 83:517-21. [PMID: 26817465 DOI: 10.1007/s12098-015-1998-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 08/10/2015] [Accepted: 12/16/2015] [Indexed: 12/01/2022]
Abstract
OBJECTIVES To evaluate the spectrum of PTPN11 gene mutations in Noonan syndrome patients and to study the genotype-phenotype associations. METHODS In this study, twenty Noonan syndrome patients with PTPN11 mutations were included. The patients underwent a detailed clinical and physical evaluation. To identify inherited cases, parents of all mutation positive patients were analyzed. RESULTS Thirteen different PTPN11 mutations, two of them being novel, were detected in the study group. These mutations included eleven missense mutations: p.G60A, p.D61N, p.Y62D, p.Y63C, p.E69Q, p.Q79R, p.Y279C,p.N308D, p.N308S, p.M504V, p.Q510R and two novel missense mutations: p.I56V and p.I282M. The frequency of cardiac abnormalities and short stature were found to be 80 % and 80 %, respectively. Mental retardation was not observed in patients having exon 8 mutations. No significant correlations were detected between other phenotypic features and genotypes. CONCLUSIONS By identifying genotype-phenotype correlations, this study provides information on phenotypes observed in NS patients with different PTPN11 mutations.
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Affiliation(s)
- Tahir Atik
- Division of Genetics, Department of Pediatrics, School of Medicine, Ege University, 35100, Bornova, Izmir, Turkey.
| | - Ayca Aykut
- Department of Medical Genetics, School of Medicine, Ege University, Izmir, Turkey
| | - Filiz Hazan
- Department of Medical Genetics, Dr. Behcet Uz Children's Hospital, Izmir, Turkey
| | - Huseyin Onay
- Department of Medical Genetics, School of Medicine, Ege University, Izmir, Turkey
| | - Damla Goksen
- Division of Endocrinology, Department of Pediatrics, School of Medicine, Ege University, Izmir, Turkey
| | - Sukran Darcan
- Division of Endocrinology, Department of Pediatrics, School of Medicine, Ege University, Izmir, Turkey
| | - Ajlan Tukun
- Department of Genetics, School of Medicine, Ankara University, Ankara, Turkey
| | - Ferda Ozkinay
- Division of Genetics, Department of Pediatrics, School of Medicine, Ege University, 35100, Bornova, Izmir, Turkey.,Department of Medical Genetics, School of Medicine, Ege University, Izmir, Turkey
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Diniz G, Tekgul H, Hazan F, Yararbas K, Tukun A. Sarcolemmal deficiency of sarcoglycan complex in an 18-month-old Turkish boy with a large deletion in the beta sarcoglycan gene. Balkan J Med Genet 2015; 18:71-76. [PMID: 27785400 PMCID: PMC5026271 DOI: 10.1515/bjmg-2015-0088] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Limb-girdle muscular dystrophy type 2E (LGMD-2E) is caused by autosomal recessive defects in the beta sarcoglycan (SGCB) gene located on chromosome 4q12. In this case report, the clinical findings, histopathological features and molecular genetic data in a boy with β sarcoglycanopathy are presented. An 18-month-old boy had a very high serum creatinine phosphokinase (CPK) level that was accidentally determined. The results of molecular analyses for the dystrophin gene was found to be normal. He underwent a muscle biopsy which showed dystrophic features. Immunohistochemistry showed that there was a total loss of sarcolemmal sarcoglycan complex. DNA analysis revealed a large homozygous deletion in the SCGB gene. During 4 years of follow-up, there was no evidence to predict a severe clinical course except the muscle enzyme elevation and myopathic electromyography (EMG) finding. The presented milder phenotype of LGMD-2E with a large deletion in the SGCB gene provided additional support for the clinical heterogeneity and pathogenic complexity of the disease.
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Affiliation(s)
- G Diniz
- Neuromuscular Disease Center, Tepecik Research Hospital, İzmir, Turkey
| | - H Tekgul
- Department of Pediatric Neurology, Ege University, Faculty of Medicine, İzmir, Turkey
| | - F Hazan
- Department of Medical Genetics, Dr. Behcet Uz Children's Research Hospital, İzmir, Turkey
| | - K Yararbas
- Department of Medical Genetics, Duzen Laboratories, Istanbul, Turkey
| | - A Tukun
- Department of Medical Genetics, Duzen Laboratories, Ankara, Turkey
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6
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Ekinci S, Ilgin-Ruhi H, Dogan M, Gursoy S, Dizbay-Sak S, Demirkazik A, Tukun A. Molecular spectrum of PIK3CA gene mutations in patients with nonsmall-cell lung cancer in Turkey. Genet Test Mol Biomarkers 2015; 19:353-8. [PMID: 26053643 DOI: 10.1089/gtmb.2015.0060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
AIMS The aim of the present study was to obtain the first data for the phosphatidylinositol-4,5-bisphosphate 3-kinase (PIK3CA) mutation frequency among nonsmall-cell lung cancer (NSCLC) patients in Turkey. All exons of the PIK3CA gene were investigated by sequence analysis in 40 NSCLC tumor tissue samples. RESULTS The 1634A>C mutation, which has previously been identified in many cancers including NSCLC, was identified in three tumor tissue samples in the present study. Interestingly, a second mutation (1658_1659delGTinsC) was also identified in these patients. The concurrence of these two mutations has been reported as the Cowden syndrome, which is known to be a cancer predisposition syndrome. This finding is important since it may be an indicator of the underlying cancer predisposition syndrome in NSCLC patients. Moreover, four novel mutations were identified in the present study. However, in vitro studies are required to evaluate the effects of these mutations on kinase activation. CONCLUSIONS The high frequency of PIK3CA mutations exerts important clinical implications for targeted therapy. This finding indicates that therapeutic agents targeting the phosphatidylinositol 3-kinase (PI3K) would be beneficial in the NSCLC subpopulation.
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Affiliation(s)
- Sadiye Ekinci
- 1 Department of Medical Genetics, Faculty of Medicine, Ankara University , Ankara, Turkey
| | - Hatice Ilgin-Ruhi
- 1 Department of Medical Genetics, Faculty of Medicine, Ankara University , Ankara, Turkey
| | - Mutlu Dogan
- 2 Medical Oncology Clinic, Ankara Numune Training and Research Hospital , Ankara, Turkey
| | - Semin Gursoy
- 3 Division of Medical Genetics, Duzen Laboratories Group , Ankara, Turkey
| | - Serpil Dizbay-Sak
- 4 Department of Medical Pathology, Faculty of Medicine, Ankara University , Ankara, Turkey
| | - Ahmet Demirkazik
- 5 Department of Medical Oncology, Faculty of Medicine, Ankara University , Ankara, Turkey
| | - Ajlan Tukun
- 1 Department of Medical Genetics, Faculty of Medicine, Ankara University , Ankara, Turkey .,3 Division of Medical Genetics, Duzen Laboratories Group , Ankara, Turkey
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Öcal G, Berberoğlu M, Sıklar Z, Aycan Z, Hacıhamdioglu B, Savas Erdeve Ş, Çamtosun E, Kocaay P, Ruhi HI, Kılıç BG, Tukun A. Clinical review of 95 patients with 46,XX disorders of sex development based on the new Chicago classification. J Pediatr Adolesc Gynecol 2015; 28:6-11. [PMID: 25444050 DOI: 10.1016/j.jpag.2014.01.106] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 07/17/2013] [Revised: 01/27/2014] [Accepted: 01/31/2014] [Indexed: 11/24/2022]
Abstract
STUDY OBJECTIVE The aim of our study was to determine the etiologic distribution of 46,XX disorder of sexual development (DSD) according to the new DSD classification system and to evaluate the clinical features of this DSD subgroup in our patient cohort. PARTICIPANTS The evaluation criteria and clinical findings of 95 46,XX patients were described by clinical presentation, gonadal morphology, genital anatomy, associated dysmorphic features, presence during prenatal period with/without postnatal virilization, hormonal characteristics, and presence or absence of steroidogenic defects among 319 patients with DSD. RESULTS Types and ratios of each presentation of our 95 patients with 46,XX DSD were as follows: 82 had androgen excess (86.3%): (74 had classical congenital adrenal hyperplasia, 2 had CAH variant possibility of P450-oxidoreductase gene defect), 6 had disorders of ovarian development (6.3%): (1 patient had gonadal dysgenesis with virilization at birth with bilateral streak gonad, 4 patients had complete gonadal dysgenesis, and 1 patient had ovotesticular DSD) and 7 had other 46,XX DSD. Two sisters, who had 46,XX complete gonadal dysgenesis,were diagnosed with Perrault Syndrome with ovarian failure due to streak gonads and associated with sensorineural deafness. CONCLUSION 46,XX DSD are usually derived from intrauterine virilization and CAH is the most common cause of 46,XX DSD due to fetal androgen exposure.
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Affiliation(s)
- Gönül Öcal
- Pediatric Endocrinology, Department of Pediatric Endocrinology, Ankara University School of Medicine, Ankara, Turkey
| | - Merih Berberoğlu
- Pediatric Endocrinology, Department of Pediatric Endocrinology, Ankara University School of Medicine, Ankara, Turkey
| | - Zeynep Sıklar
- Pediatric Endocrinology, Department of Pediatric Endocrinology, Ankara University School of Medicine, Ankara, Turkey.
| | - Zehra Aycan
- Pediatric Endocrinology, Dr. Sami Ulus Children Hospital, Ankara, Turkey
| | - Bülent Hacıhamdioglu
- Pediatric Endocrinology, Department of Pediatric Endocrinology, Ankara University School of Medicine, Ankara, Turkey
| | - Şenay Savas Erdeve
- Pediatric Endocrinology, Department of Pediatric Endocrinology, Ankara University School of Medicine, Ankara, Turkey
| | - Emine Çamtosun
- Pediatric Endocrinology, Department of Pediatric Endocrinology, Ankara University School of Medicine, Ankara, Turkey
| | - Pınar Kocaay
- Pediatric Endocrinology, Department of Pediatric Endocrinology, Ankara University School of Medicine, Ankara, Turkey
| | - Hatice I Ruhi
- Medical Genetics, Department of Medical Genetics, Ankara University School of Medicine, Ankara, Turkey
| | - Birim G Kılıç
- Pediatric Psychiatry, Department of Pediatric Psychiatry, Ankara University School of Medicine, Ankara, Turkey
| | - Ajlan Tukun
- Medical Genetics, Department of Medical Genetics, Ankara University School of Medicine, Ankara, Turkey
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Dinccelik-Aslan M, Gumus-Akay G, Elhan AH, Unal E, Tukun A. Diagnostic and prognostic significance of glypican 5 and glypican 6 gene expression levels in gastric adenocarcinoma. Mol Clin Oncol 2015; 3:584-590. [PMID: 26137271 DOI: 10.3892/mco.2015.486] [Citation(s) in RCA: 15] [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: 05/16/2014] [Accepted: 12/09/2014] [Indexed: 12/26/2022] Open
Abstract
Gastric Cancer is one of the most common malignancies worldwide and the second most common cause of cancer-related mortality. Previous studies revealed several genetic alterations specific to gastric cancer. In this study, we aimed to investigate the diagnostic and prognostic significance of the expression levels of the glypican 5 and glypican 6 genes (GPC5 and GPC6, respectively) in gastric cancer. For this purpose, GPC5 and GPC6 expression was quantitatively determined by quantitative polymerase chain reaction method in normal gastric mucosa and intestinal type gastric adenocarcinoma samples from 35 patients. The expression levels of GPC5 and GPC6 were compared between normal and tumor tissues. Additionally, the association of the expression levels in tumor tissues with several clinicopathological parameters was evaluated. Although GPC5 was not expressed in any of the samples, the expression of GPC6, which was detected in both groups, was found to be significantly higher in tumor tissues compared to that in normal samples (P=0.039). However, there was no statistically significant association between GPC6 expression and any of the clinicopathological parameters investigated (P>0.05). Our findings suggested that an increase in GPC6 expression levels may be implicated in gastric cancer development, but not in cancer progression.
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Affiliation(s)
| | - Guvem Gumus-Akay
- Brain Research Centre, Ankara University, Mamak, Ankara 06900, Turkey
| | - Atilla Halil Elhan
- Department of Biostatistics, Faculty of Medicine, Ankara University, Sihhiye, Ankara 06100, Turkey
| | - Ekrem Unal
- Department of Surgical Oncology, Research and Training Hospital, Faculty of Medicine, Ankara University, Cebeci, Ankara 06580, Turkey
| | - Ajlan Tukun
- Department of Medical Genetics, Faculty of Medicine, Ankara University, Sihhiye, Ankara 06100, Turkey
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Diniz G, Hazan F, Yildirim H, Unalp A, Polat M, Serdaroglu G, Ture S, Akhan G, Tukun A. G.P.224. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Diniz G, Tosun Yildirim H, Akinci G, Hazan F, Ozturk A, Yararbas K, Tukun A. Sarcolemmal alpha and gamma sarcoglycan protein deficiencies in Turkish siblings with a novel missense mutation in the alpha sarcoglycan gene. Pediatr Neurol 2014; 50:640-7. [PMID: 24742800 DOI: 10.1016/j.pediatrneurol.2013.12.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 09/27/2013] [Revised: 12/08/2013] [Accepted: 12/11/2013] [Indexed: 11/26/2022]
Abstract
BACKGROUND The sarcoglycan alpha gene, also known as the adhalin gene, is located on chromosome 17q21; mutations in this gene are associated with limb-girdle muscular dystrophy type 2D. We describe two Turkish siblings with findings consistent with limb-girdle muscular dystrophy type 2D. The evaluation excluded a dystrophinopathy, which is the most common form of muscular dystrophy. PATIENTS Both siblings had very high levels of creatinine phosphokinase and negative molecular tests for deletions and duplications of the dystrophin gene. The older boy presented at 8 years of age with an inability to climb steps and an abnormal gait. His younger brother was 5 years old and had similar symptoms. The muscle biopsy evaluation was performed only in the older brother. RESULTS The muscle biopsy showed dystrophic features as well as a deficiency in the expression of two different glycoproteins: the alpha sarcoglycan and the gamma sarcoglycan. Sarcolemmal expressions of dystrophin and other sarcoglycans (beta and delta) were diffusely present. DNA analysis demonstrated the presence of previously unknown homozygous mutations [c.226 C > T (p.L76 F)] in exon 3 in the sarcoglycan alpha genes of both siblings. Similar heterozygous point mutations at the same locus were found in both parents, but the genes of beta, delta, and gamma sarcoglycan were normal in the remaining family members. CONCLUSIONS We describe two siblings with limb-girdle muscular dystrophy type 2D with a novel missense mutation. These patients illustrate that the differential diagnosis of muscular dystrophies is impossible with clinical findings alone. Therefore, a muscle biopsy and DNA analysis remain essential methods for diagnosis of muscle diseases.
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Affiliation(s)
- Gulden Diniz
- Basic Oncology, Associate Professor in Pathology, Tepecik Research Hospital, Izmir, Turkey.
| | - Hulya Tosun Yildirim
- Pathology Department, Dr. Behcet Uz Children's, Research Hospital, Izmir, Turkey
| | - Gulcin Akinci
- Pediatric Neurology Department, Dr. Behcet Uz Children's, Research Hospital, Izmir, Turkey
| | - Filiz Hazan
- Medical Genetics Department, Dr. Behcet Uz Children's, Research Hospital, Izmir, Turkey
| | - Aysel Ozturk
- Pediatric Neurology Department, Dr. Behcet Uz Children's, Research Hospital, Izmir, Turkey
| | - Kanay Yararbas
- Medical Genetics Department, Duzen Laboratories, Istanbul and Ankara, Turkey
| | - Ajlan Tukun
- Medical Genetics Department, Duzen Laboratories, Istanbul and Ankara, Turkey; Medical Genetics Department, Ankara University Medical School, Ankara, Turkey
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Diniz G, Hazan F, Yildirim HT, Unalp A, Polat M, Serdaroglu G, Guzel O, Bag O, Secil Y, Ozgonul F, Ture S, Akhan G, Tukun A. Histopathological and genetic features of patients with limb girdle muscular dystrophy type 2c. Turk Patoloji Derg 2014; 30:111-7. [DOI: 10.5146/tjpath.2014.01239] [Citation(s) in RCA: 2] [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: 11/18/2022] Open
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Abstract
We present a case of a 19-year-old phenotypically normal girl with premature ovarian failure. Cytogenetic analysis using G banding and fluorescence in situ hybridization (FISH) from cultured peripheral blood lymphocytes of the patient and the family revealed a de novo X;15 translocation and the imbalance to be 46,X,t(X;15)(Xpter → Xq21::15q11 → 15qter;15pter → 15q11::Xq21 → Xqter). ish (CEPX+, wep15+, ISNRPN+, PML+, D15S10+, wcp15-, SNRRN-, PML-)[20]. The X chromosome inactivation (XCI) assay revealed a completely skewed XCI pattern in which selective pressure favors an active maternal allele. The Affymetrix 2.7 M cytogenetics whole-Genome array confirmed the chromosomal imbalance and identified disruption of the HDX gene at Xq21, the translocation breakpoint.
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Affiliation(s)
- Gülsen Okten
- Faculty of Medicine, Department of Medical Biology, Ondokuz Mayis University, Samsun, Turkey.
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Dogan M, Karabulut HG, Tukun A, Demirkazik A, Utkan G, Yalcin B, Dincol D, Akbulut H, Icli F. Relationship between antimetabolite toxicity and pharmacogenetics in Turkish cancer patients. Asian Pac J Cancer Prev 2013; 13:1553-6. [PMID: 22799365 DOI: 10.7314/apjcp.2012.13.4.1553] [Citation(s) in RCA: 8] [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: 11/10/2022] Open
Abstract
INTRODUCTION Antimetabolites may cause severe toxicity and even toxic death in cancer patients. Our aim was to evaluate the relationship between antimetabolite toxicity and pharmacogenetics in patients with severe clinical toxicity or alanine transaminase (ALT) elevation after fluorouracil (5FU), capecitabine or methotrexate administration. PATIENTS AND METHODS Cancer patients with severe antimetabolite toxicity were evaluated for methylenetetrahydrofolate reductase (MTHFR) gene C667T, thymidilate synthase (TS) gene 5' UTR variable number of tandem repeats (VNTR), dihydroprymidine dehydrogenase (DPYD) gene IVS14+1G/A, Xeroderma pigmentosum (XPD) gene Lys751Gln and X-ray repair cross-complementing group 1 (XRCC1) gene Arg399Gln polymorphisms. RESULTS Eighteen patients were enrolled, with a male/female ratio of 0.8. They had osteosarcoma in methotrexate group (n=7), gastrointestinal malignancies in 5FU group (n=9) and breast cancer in the capecitabine group (n=2). Mucositis and dermatitis occurred in all groups, together with ALT elevation in the methotrexate group and 2 toxic deaths were encountered. DPYD, TS, MTHFR, XPD and XRCC1 gene polymorphism rare allele frequencies were observed to be higher than in the general population. CONCLUSION Pharmacogenetics might contribute to tailored therapy.
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Affiliation(s)
- Mutlu Dogan
- Dept of Medical Oncology, School of Medicine, Ankara University, Ankara, Turkey.
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Hazan F, Ozturk A, Adibelli H, Unal N, Tukun A. A novel missense mutation of the paired box 3 gene in a Turkish family with Waardenburg syndrome type 1. Mol Vis 2013; 19:196-202. [PMID: 23378733 PMCID: PMC3559089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 01/27/2013] [Indexed: 11/21/2022] Open
Abstract
PURPOSE Screening of mutations in the paired box 3 (PAX3) gene in three generations of a Turkish family with Waardenburg syndrome type 1 (WS1). METHODS WS1 was diagnosed in a 13-month-old girl according to the WS Consortium criteria. Detailed family history of the proband revealed eight affected members in three generations. Routine clinical and audiological examination and ophthalmologic evaluation were performed on eight affected and five healthy members of the study family. Dystopia canthorum was detected in all affected patients; however, a brilliant blue iris was present in five patients who also had mild retinal hypopigmentation. Genomic DNA was extracted from the peripheral blood of affected and unaffected individuals in the family as well as 50 unrelated healthy volunteers. All coding exons and adjacent intronic regions of PAX3 were sequenced directly. RESULTS A novel missense heterozygous c.788T>G mutation was identified in eight patients. This nucleotide alteration was not found in unaffected members of the study family or in the 50 unrelated control subjects. The mutation causes V263G amino-acid substitution in the homeodomain of the PAX3 protein, which represents the 45(th) residue of helix 3. CONCLUSIONS We identified a novel missense c.788T>G mutation in PAX3 in a family with Waardenburg syndrome with intrafamilial phenotypic heterogeneity.
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Affiliation(s)
- Filiz Hazan
- Department of Medical Genetics, Dr. Behçet Uz Children's Hospital, Izmir, Turkey
| | - A.Taylan Ozturk
- Department of Ophthalmology, Dr. Behçet Uz Children's Hospital, Izmir, Turkey
| | - Hamit Adibelli
- Department of Otolaryngology, Dr. Behçet Uz Children's Hospital, Izmir, Turkey
| | - Nurettin Unal
- Department of Pediatrics, Dr. Behçet Uz Children's Hospital, Izmir, Turkey
| | - Ajlan Tukun
- Department of Medical Genetics, Faculty of Medicine, Ankara University, Ankara, Turkey,Duzen Laboratory Groups, Genetics Division, Ankara, Turkey
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15
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Ekiz F, Ormeci N, Coban S, Karabulut HG, Aktas B, Tukun A, Tuncali T, Yüksel O, Alkış N. Association of methylenetetrahydrofolate reductase C677T-A1298C polymorphisms with risk for esophageal adenocarcinoma, Barrett's esophagus, and reflux esophagitis. Dis Esophagus 2012; 25:437-41. [PMID: 21951971 DOI: 10.1111/j.1442-2050.2011.01262.x] [Citation(s) in RCA: 8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Incidence of the esophagus adenocarcinoma has been dramatically increasing in Western countries since the last decade. Gastroesophageal reflux disease and Barrett's esophagus are risk factors for adenocarcinoma. Methylenetetrahydrofolate reductase (MTHFR) genes play a key role not only in folate metabolism but also in esophagus, stomach, pancreatic carcinoma, and acute leukemias. Studies have suggested that genetic polymorphisms of MTHFR (C677T) may clarify the causes and events involved in esophageal carcinogenesis. In this study, we evaluated MTHFR C677T and A1298C polymorphisms, and vitamin B12, folate, and plasma homocystein levels in patients with esophageal adenocarcinoma (EAC), Barrett's esophagus (BE), chronic esophagitis, and healthy controls (n = 26, n = 14, n = 30, and n = 30, respectively). The mean age of patients in the EAC and BE groups was significantly higher compared with the control group (P < 0.001, P = 0.003, respectively). In all patient groups, serum folate levels were significantly lower than that of the control group (P < 0.01, P < 0.05, and P < 0.01, respectively). There was no statistically significant association between folate levels and MTHFR gene polymorphisms. No differences were found in terms of MTHFR gene polymorphisms, homocystein, and B12 levels among the groups. MTHFR gene polymorphisms and folate deficiency are not predictors of early esophageal carcinoma. However, further studies using larger series of patients are needed to evaluate the effect of genetic polymorphisms in the folate metabolic pathway and to clarify the role of folate deficiency and folate metabolism in the development of esophagus adenocarcinoma.
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Affiliation(s)
- F Ekiz
- Department of Gastroenterology, Dıskapı Yıldırım Beyazıt Educational and Research Hospital, Ankara, Turkey.
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16
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Gecene M, Tuncay F, Borman P, Yucel D, Senes M, KaniyeYilmaz B, Franks L, Radusky R, Feig J, Fernandez P, Cronstein B, Chan E, Kim G, Han S, Jung Y, Usmani SE, Ulici V, Beier F, Bell MJ, Veinot P, Embuldeniya G, Nyhof-Young J, Sale J, Sargeant J, Tugwell P, Brooks S, Ross S, Tonon R, Richards D, Boyle J, Knickle K, Sandhu S, Britten N, Bell E, Webster F, Cox-Dublanski M, Ntatsaki E, Watts RA, Scott DGI, Borman P, Tasbas O, Gurhan Karabulut H, Tukun A, Yorgancioglu R, Ferraz-Amaro I, Arce-Franco M, Hernandez-Hernandez V, Delgado-Frias E, Gantes M, Ramon Muniz J, Jesus Dominguez-Luis M, Herrera-Garcia A, Antonio Garcia-Dopico J, Medina L, Rodriguez-Vargas A, Diaz-Gonzalez F, Zampeli E, Protogerou A, Stamatelopoulos K, Fragiadaki K, Katsiari CG, Kyrkou K, Papamichael CM, Mavrikakis M, Nightingale P, Sfikakis PP, Zampeli E, Karanasos A, Felekos I, Aggeli C, Stefanadis C, Toutouzas K, Protogerou A, Sfikakis PP, Faezi ST, Akbarian M, Jamshidi A, Hoseynialmodarresi M, Davatchi F, San Koo B, Wook So M, Kim YG, Lee CK, Yoo B, Warrington KJ, Kermani TA, Crowson CS, Ytterberg SR, Hunder GG, Gabriel SE, Matteson EL. Best Oral Presentations (OP01-OP12). Rheumatology (Oxford) 2012. [DOI: 10.1093/rheumatology/ker437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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17
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Tos T, Karaman A, Aksoy A, Tukun A. Structural chromosomal abnormalities in patients with mental retardation and/or multiple congenital anomalies: a new series of 24 patients. Genet Couns 2012; 23:289-296. [PMID: 22876589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Chromosomal abnormalities are a major cause of mental retardation and/or multiple congenital anomalies (MCA/MR). Screening for these chromosomal imbalances has mainly been done by standard karyotyping. The objective of this study was to report standard chromosome analysis and FISH screening of a series of 24 patients with MCA/MR. Structural chromosomal abnormalities were detected in 24 alterations and included 5 deletions, 2 duplications, 6 unbalanced translocations, 3 inversions, 2 insertions, 3 derivative chromosomes, 2 marker chromosomes and 1 isochromosome. We confirm that a high percentage of MCA/MR cases hitherto considered idiopathic is caused by chromosomal imbalances. We conclude that patients with MCA/MR should be routinely karyotyped.
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Affiliation(s)
- T Tos
- Department of Medical Genetics, Dr. Sami Ulus Children's Health and Diseases Training and Research Hospital, Ankara, Turkey
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18
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Dogan M, Demirkazik A, Tukun A, Akbulut H, Dizbay Sak S, Ceyhan K, Yalcin B, Icli F. The relationship between common EGFR, b-raf, k-ras mutations, and prognosis in advanced-stage NSCLC with response to the treatment. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e18075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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19
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Savas Erdeve S, Berberoglu M, Yurur-Kutlay N, Siklar Z, Hacihamdioglu B, Tukun A, Ocal G. Characteristics and prevalence of non-classical congenital adrenal hyperplasia with a V2811 mutation in patients with premature pubarche. J Pediatr Endocrinol Metab 2011; 24:965-70. [PMID: 22308849 DOI: 10.1515/jpem.2011.354] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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: 11/15/2022]
Abstract
We aimed to determine the prevalence and clinical characteristics of non-classical congenital adrenal hyperplasia (NCCAH) with V281L mutation in patients with premature pubarche. An adrenocorticotrophic hormone (ACTH) stimulation test was performed in 14 of the 159 patients with premature pubarche (PP). Patients whose stimulated 17alpha-hydroxyprogesterone (17-OHP) level on the ACTH test was > or =10 ng/mL underwent a mutational analysis of the CYP21 gene. NCCAH was defined in nine (5.7%) patients, all of whom had the V281L mutation. Four of the NCCAH patients were homozygote and four of them were heterozygote. One other patient was compound heterozygote for V281L mutation and the I2 splice mutation. One of the patients with V281L heterozygous mutation developed true precocious puberty and the other one had rapid progressive early puberty and developed polycystic ovary syndrome. ACTH stimulated 17-OHP > or = 10 ng/mL in PP patients is load star to mutation analysis and heterozygote patients should be followed for clinical and biological hyperandrogenism up to completion of the whole 'genome sequence'.
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Affiliation(s)
- Senay Savas Erdeve
- Divisione of Pediatric Endocrinology, Department of Pediatrics, Ankara University School of Medicine, Ankara, Turkey.
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20
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Sagnak L, Ersoy H, Ozok U, Eraslan A, Yararbas K, Goktug G, Tukun A. The significance of Y chromosome microdeletion analysis in subfertile men with clinical variocele. Arch Med Sci 2010; 6:382-7. [PMID: 22371775 PMCID: PMC3282516 DOI: 10.5114/aoms.2010.14259] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2010] [Revised: 03/26/2010] [Accepted: 03/29/2010] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION The aim of study is determining the cost-effectiveness of detection analysis in the presence of exceptional patients who have mild semen disorders, and beware of unnecessary varicocele repairs; and to ascertain whether patients with clinical varicocele should undergo Y chromosome (Yq) microdeletion analysis as a routine procedure. MATERIAL AND METHODS Varicocele with reflux was diagnosed in 51 male patients with subfertility symptoms upon physical examination (PE), confirmed by scrotal colour-Doppler ultrasound (CDU). After cytogenetic examination, Yq microdeletion analysis was performed on the peripheral blood samples using Promega Y Chromosome Deletion Detection System Version 2. Varicocele repair was performed under general anaesthesia with optical magnification (3-fold) through a subinguinal approach. RESULTS The mean age of the patients was 27.9. Values of semen concentration ranged from 0 to 72 million/ml, motility from 0 to 65% (A + B) and Kruger from 0% to 18%. The PE revealed normal size and consistency in the bilateral testicles. All patients were cytogenetically normal. However, Yq microdeletion was detected in 2 patients, 1 with mild oligoteratozoospermia and partial AZFb deletion (sY121) and the second patient with severe oligozoospermia and partial AZFc deletion (sY254 and sY255), and they were not subjected to varicocelectomy. CONCLUSIONS The routine performance of pre-operative Yq microdeletion analysis in patients with clinical varicocele does not seem to be cost-effective but the omission of patients with mild oligozoospermia would have subjected them to an unnecessary varicocelectomy and/or further ICSI applications and also would have caused the failure of referral for genetic counselling.
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Affiliation(s)
- Levent Sagnak
- Urology Clinics, Yildirim Beyazit Education and Research Hospital, Ministry of Health, Ankara, Turkey
| | - Hamit Ersoy
- Urology Clinics, Yildirim Beyazit Education and Research Hospital, Ministry of Health, Ankara, Turkey
| | - Ugur Ozok
- Urology Clinics, Yildirim Beyazit Education and Research Hospital, Ministry of Health, Ankara, Turkey
| | - Asir Eraslan
- Urology Clinics, Yildirim Beyazit Education and Research Hospital, Ministry of Health, Ankara, Turkey
| | - Kanay Yararbas
- Medical Genetics Department, Ankara University School of Medicine, Ankara, Turkey
| | - Goksel Goktug
- Urology Clinics, Yildirim Beyazit Education and Research Hospital, Ministry of Health, Ankara, Turkey
| | - Ajlan Tukun
- Medical Genetics Department, Ankara University School of Medicine, Ankara, Turkey
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21
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Polat O, Polat G, Karahuseyinoglu S, Kutlay NY, Tasci AG, Erdemli E, Tukun A, Avunduk MC, Küplülü S, Demirtas M. Bone Fracture Healing with Umbilico-Placental Mononuclear Cells: A Controlled Animal Study. Eur J Trauma Emerg Surg 2010; 36:60-6. [PMID: 26815570 DOI: 10.1007/s00068-009-9038-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 02/15/2009] [Accepted: 07/20/2009] [Indexed: 11/27/2022]
Abstract
BACKGROUND Fracture healing is a significant process in orthopedics. In this controlled animal study, our aimis to expose the healing effects of cord blood umbilico-placental mononuclear cells (UPMNCs) on bone fractures. MATERIALS AND METHODS Caesarean sections were performed on five pregnant New Zealand rabbits at term. Placentas and cords were collected. Standard closed transverse shaft fractures were created on both tibial bones of 15 baby rabbits. The right tibias were given UPMNCs; the left tibias were the control group. Histological examinations, osteoblast and osteoclast cell counts, and mechanical stabilities were compared. Anchorage of the donor cells was shown by the fluorescence in situ hybridization (FISH) technique. RESULTS In the group injected with UPMNCs, histopathological fracture healing was faster, osteoblast and osteoclast counts were significantly increased, and the maximum load capacity was higher. The presence of XX and XY chromatins on the same slide revealed the anchorage of female donor cells on male tissues. CONCLUSION The effects of umbilico-placental mononuclear cells on bone healing are histopathological healing priority, increased osteoblastic and osteoclastic activities (bone turnover), and better mechanical stability.
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Affiliation(s)
- Onur Polat
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey. .,Ibni Sina Hospital Emergency, Department Ankara, University Faculty of Medicine Ankara, 06106, Sihhiye, Turkey.
| | - Gurur Polat
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey
| | - Sercin Karahuseyinoglu
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey
| | - Nüket Yörür Kutlay
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey
| | - Arzu Gül Tasci
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey
| | - Esra Erdemli
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey
| | - Ajlan Tukun
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey
| | - Mustafa Cihat Avunduk
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey
| | - Sükrü Küplülü
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey
| | - Mehmet Demirtas
- Ibni Sina Hospital Emergency Department, Ankara University, Faculty of Medicine Ankara, Sihhiye, Turkey
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22
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Unal S, Cetin M, Kutlay NY, Elmas SA, Gumruk F, Tukun A, Tuncer M, Gurgey A. Hemophagocytosis associated with leukemia: a striking association with juvenile myelomonocytic leukemia. Ann Hematol 2009; 89:359-64. [DOI: 10.1007/s00277-009-0837-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Accepted: 09/16/2009] [Indexed: 02/05/2023]
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23
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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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Sadeghi F, Yurur-Kutlay N, Berberoglu M, Cetinkaya E, Aycan Z, Kara C, Ilgin Ruhi H, Ocal G, Siklar Z, Elhan A, Tukun A. Identification of frequency and distribution of the nine most frequent mutations among patients with 21-hydroxylase deficiency in Turkey. J Pediatr Endocrinol Metab 2008; 21:781-7. [PMID: 18825878 DOI: 10.1515/jpem.2008.21.8.781] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [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: 11/15/2022]
Abstract
UNLABELLED Congenital adrenal hyperplasia (CAH) is a group of autosomal recessive disorders mainly due to defects in the steroid 21-hydroxylase (CYP21A2) gene. METHODS To determine the mutational spectrum in the Turkish population, the CYP21A2 active gene was analyzed in 100 unrelated patients with the classical form of 21-hydroxylase deficiency using PCR and RFLP. RESULTS Mutations were detected in 78 patients: 64 patients were homozygous for one mutation, seven patients were compound heterozygous with different mutations on each chromosome, two patients were homozygous for two different mutations, five patients were heterozygous, and 22 patients harbored none of the tested mutations. The most frequent mutation was IVS2-13A/C (28.5%), followed by large gene deletion (17%), Q318X (11.5%), I172N (4%), V281L (3.5%), R356W (3.5%), 8-bp (3%), complex alleles (2%), P30L (1%) and E6 cluster (1%). CONCLUSION The distribution of mutation frequencies in our study was slightly different from those previously reported in Turkey and in other parts of the world.
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Affiliation(s)
- F Sadeghi
- Medical Genetics Department, Ankara University Faculty of Medicine, Ankara, Turkey.
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Abstract
Multiple myeloma (MM) is a malignant plasma cell disorder that involves multiple genetic abnormalities. Chimeric transcription factors, created by gene fusion as a result of chromosomal translocations, have been implicated in the pathogenesis of the disease. Here, we report the conventional cytogenetic analysis of a MM patient that showed a complex set of novel chromosomal rearrangements, including t(13;16)(q14;q24) and t(1;15)(q10;q26). This is probably the result of fusion of previously known genes, and would contribute to prognostic significance of the disease.
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MESH Headings
- Chromosomes, Human, Pair 1/genetics
- Chromosomes, Human, Pair 13/genetics
- Chromosomes, Human, Pair 15/genetics
- Chromosomes, Human, Pair 16/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Male
- Middle Aged
- Multiple Myeloma/genetics
- Translocation, Genetic/genetics
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Affiliation(s)
- I Akalin
- Department of Medical Genetics, Faculty of Medicine, Ankara University, Sihhiye, Ankara, Turkey.
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26
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Karahuseyinoglu S, Cinar O, Kilic E, Kara F, Akay GG, Demiralp DO, Tukun A, Uckan D, Can A. Biology of stem cells in human umbilical cord stroma: in situ and in vitro surveys. Stem Cells 2006; 25:319-31. [PMID: 17053211 DOI: 10.1634/stemcells.2006-0286] [Citation(s) in RCA: 335] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cells in the umbilical cord stroma have gained attention in recent years; however, differentiation to certain lineages in humans has been demonstrated in few studies. Unlike bone marrow MSCs, human umbilical cord stroma cells (HUCSCs) are far from being well characterized. This study attempts to describe proliferation, structural, and differentiation properties of these cells to account for their exceptional nature in many aspects. Cellular dynamics, cellular structure, and the degree of transformations during expansion and differentiation into mesenchymal and neuronal lineages were examined in vitro over a 10-month period. Comparisons with human bone marrow MSCs regarding differentiation were performed. HUCSCs in culture revealed two distinct cell populations, type 1 and type 2 cells, that possessed differential vimentin and cytokeratin filaments. Corresponding cells were encountered in cord sections displaying region-specific localization. alpha-Smooth muscle actin and desmin filaments, which were evident in cord sections, diminished through passages. No difference was noted regarding type 1 and type 2 cells in differentiation to chondrogenic, adipogenic, and osteogenic lineages, whereas a preferential differentiation was noted in neuronal lineage. Relative success was achieved by production of chondrocytic spheres and osteogenic monolayers, whereas adipocytes were immature compared with bone marrow MSCs. The presence of neuronal markers suggests that they transform into a certain state of maturity under neurogenic induction. Conclusively, HUCSCs retain their original phenotype in culture without spontaneous differentiation, have a limited lifespan, and bear multipotent stem cell characteristics. Given these characteristics, they may be generally considered progenitor cells if manipulated under appropriate conditions and deserve further study to be potentially used in cell-based therapies.
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Affiliation(s)
- Sercin Karahuseyinoglu
- Department of Histology and Embryology, Ankara University School of Medicine, Sihhiye, 06100 Ankara, Turkey
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27
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Akalin I, Yararbas K, Akgul N, Babaoglu E, Akay GG, Dyer S, Kutlay NY, Ruhi HI, Kog G, Tukun A. del5p/dup5q in a 'cri du chat' patient without parental chromosomal rearrangement. Am J Med Genet A 2006; 140:1016-20. [PMID: 16619202 DOI: 10.1002/ajmg.a.31220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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28
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Idilman R, Erden E, Kuzu I, Ersoz S, Karasu Z, Karayalcin K, Yuce G, Tokat Y, Sahin Y, Tukun A, Akarca US, Karayalcin S. Recipient-Derived Hepatocytes in Sex-Mismatched Liver Allografts after Liver Transplantation: Early versus Late Transplant Biopsies. Transplantation 2004; 78:1647-52. [PMID: 15591954 DOI: 10.1097/01.tp.0000144055.78462.4f] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
BACKGROUND The presence of microchimerism in transplanted tissues is well defined; however, the timeframe of appearance and disappearance of engraftment in liver allograft is unknown. The aims of this study were to analyze for the presence of "recipient-derived cells" in sex-mismatched individuals after liver transplantation, comparing the frequency of "recipient-derived cell repopulation" in early versus late transplant biopsies and to evaluate the relationship between "recipient-derived cell repopulation" and the severity of graft injury. METHODS Paraffin-embedded liver biopsy samples of 18 recipients were reviewed. Sixteen of them were obtained from recipients with sex-mismatched donors. The remaining two were obtained from recipients with sex-matched donors and were used as controls. Immunohistochemistry and fluorescence in situ hybridization double-labeling method were performed on pretreated slides using anti-human hepatocyte antibody to identify hepatocytes, a mouse anti-human cytokeratin-7 to identify ductal epithelial cells, and using CEPX/Y DNA probes for visualizing X and Y chromosomes. The double-labeled slides were examined systematically using an image analyzer system. RESULTS The mean time from transplantation to biopsy was 8.1 months. Eleven of the 16 samples obtained from recipients with sex-mismatched grafts demonstrated "recipient-derived hepatocyte repopulation," comprising a mean of 2.1% of the hepatocytes. In the control biopsies, none of the cells demonstrated different nuclear signals from the donor's sex origin. The presence and proportion of "recipient-derived hepatocyte repopulation" rate were significantly higher in early transplant biopsies than in late transplant biopsies (P < 0.05). CONCLUSION Some hepatocytes of sex-mismatched liver grafts were replaced by "recipient-derived cells" during injury. Such repopulation is more common in the early liver-graft biopsies. The severity of acute cellular rejection appears to have no effect on the rate of recipient-derived repopulation.
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Affiliation(s)
- Ramazan Idilman
- Department of Gastroenterology, Ankara University School of Medicine, Ibn'i Sina Hospital, Sihhiye, Ankara, Turkey 06100.
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Peller S, Yona R, Kopilova Y, Prokocimer M, Goldfinger N, Uysal A, Karabulut HG, Tukun A, Bokesoy I, Tuncman G, Rotter V. Molecular alterations in the TP53 gene of peripheral blood cells of patients with chronic myeloid leukemia. Genes Chromosomes Cancer 1998; 21:2-7. [PMID: 9443036 DOI: 10.1002/(sici)1098-2264(199801)21:1<2::aid-gcc2>3.0.co;2-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The TP53 gene has been extensively studied in patients with chronic myeloid leukemia (CML), both in chronic phase and in blast crisis. Mutations in the gene were found in up to 30% of the patients, especially among those in blast crisis. We report the results of an analysis of 29 blood samples from CML patients: 8 samples from chronic phase patients, 8 from patients in the accelerated phase, and 13 from patients in blast crisis. By using genomic DNA, we sequenced PCR products of the coding exons and most introns of the TP53 gene, finding genetic changes in 30% of the blast crisis samples and 12% in chronic phase. All mutations were found in introns and were previously unreported. Immunocytochemical studies revealed accumulation of TP53 in blood cells of samples both from chronic phase and blast crisis patients. Since these samples had no TP53 mutations, we believe that wild type TP53 accumulates in blood cells of CML patients. Our results, therefore, indicate that molecular changes in coding regions of the TP53 gene are rare. The significance of the abundance of intronic changes should be investigated further. Accumulation of wild type TP53 in CML cells may indicate an additional mechanism involving this gene in the pathogenesis of this disease.
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Affiliation(s)
- S Peller
- Department of Hematology Assaf-Harofe Medical Center, Zerifin, Israel
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