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Odabas GP, Aslan K, Suna PA, Kendirli PK, Erdem Ş, Çakır M, Özcan A, Yılmaz E, Karakukcu M, Donmez-Altuntas H, Yay AH, Deniz K, Altay D, Arslan D, Canatan H, Eken A, Unal E. Alantolactone ameliorates graft versus host disease in mice. Int Immunopharmacol 2024; 128:111560. [PMID: 38246003 DOI: 10.1016/j.intimp.2024.111560] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/17/2023] [Accepted: 01/15/2024] [Indexed: 01/23/2024]
Abstract
The anti-inflammatory and immunosuppressive drugs which are used in the treatment of Graft-versus-Host Disease (GVHD) have limited effects in controlling the severity of the disease. In this study, we aimed to investigate the prophylactic effect of Alantolactone (ALT) in a murine model of experimental GVHD. The study included 4 BALB/c groups as hosts: Naïve (n = 7), Control GVHD (n = 16), ALT-GVHD (n = 16), and Syngeneic transplantation (n = 10). Busulfan (20 mg/kg/day) for 4 days followed by cyclophosphamide (100 mg/kg/day) were administered for conditioning. Allogeneic transplantation was performed with cells collected from mismatched female C57BL/6, and GVHD development was monitored by histological and flow cytometric assays. Additionally, liver biopsies were taken from GVHD patient volunteers between ages 2-18 (n = 4) and non-GVHD patients between ages 2-50 (n = 5) and cultured ex vivo with ALT, and the supernatants were used for ELISA. ALT significantly ameliorated histopathological scores of the GVHD and improved GVHD clinical scores. CD8+ T cells were shown to be reduced after ALT treatment. More importantly, ALT treatment skewed T cells to a more naïve phenotype (CD62L+ CD44-). ALT did not alter Treg cell number or frequency. ALT treatment appears to suppress myeloid cell lineage (CD11c+). Consistent with reduced myeloid lineage, liver and small intestine levels of GM-CSF were reduced in ALT-treated mice. IL-6 gene expression was significantly reduced in the intestinal tissue. Ex vivo ALT-treated liver biopsy samples from GVHD patients showed a trend of decrease in pro-inflammatory cytokines but there was no statistical significance. Collectively, the data indicated that ALT may have immunomodulatory actions in a preclinical murine GVHD model.
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Affiliation(s)
- Gul Pelin Odabas
- Erciyes University School of Medicine, Department of Pediatrics, Division of Pediatric Hematology and Oncology, Kayseri, Turkiye
| | - Kubra Aslan
- Erciyes University School of Medicine, Department of Medical Biology, Kayseri, Turkiye; Betul-Ziya Eren Genome and Stem Cell Center, Erciyes University, Kayseri, Turkiye
| | - Pinar Alisan Suna
- Erciyes University School of Medicine, Department of Histology and Embryology, Kayseri, Turkiye
| | - Perihan Kader Kendirli
- Abdullah Gül University, School of Life and Natural Sciences, Department of Bioengineering, Kayseri, Turkiye
| | - Şerife Erdem
- Erciyes University School of Medicine, Department of Medical Biology, Kayseri, Turkiye; Betul-Ziya Eren Genome and Stem Cell Center, Erciyes University, Kayseri, Turkiye
| | - Mustafa Çakır
- Erciyes University School of Medicine, Department of Medical Biology, Kayseri, Turkiye; Betul-Ziya Eren Genome and Stem Cell Center, Erciyes University, Kayseri, Turkiye; Van Yuzuncu Yıl University, School of Medicine, Department of Medical Biology, Van, Turkiye
| | - Alper Özcan
- Erciyes University School of Medicine, Department of Pediatrics, Division of Pediatric Hematology and Oncology, Kayseri, Turkiye
| | - Ebru Yılmaz
- Erciyes University School of Medicine, Department of Pediatrics, Division of Pediatric Hematology and Oncology, Kayseri, Turkiye; Erciyes University, Institute of Health Sciences, Department of Blood Banking and Transfusion Medicine, Kayseri, Turkey
| | - Musa Karakukcu
- Erciyes University School of Medicine, Department of Pediatrics, Division of Pediatric Hematology and Oncology, Kayseri, Turkiye
| | - Hamiyet Donmez-Altuntas
- Erciyes University School of Medicine, Department of Medical Biology, Kayseri, Turkiye; Betul-Ziya Eren Genome and Stem Cell Center, Erciyes University, Kayseri, Turkiye
| | - Arzu Hanim Yay
- Betul-Ziya Eren Genome and Stem Cell Center, Erciyes University, Kayseri, Turkiye; Erciyes University School of Medicine, Department of Histology and Embryology, Kayseri, Turkiye
| | - Kemal Deniz
- Erciyes University School of Medicine, Department of Pathology, Kayseri, Turkiye
| | - Derya Altay
- Erciyes University School of Medicine, Department of Pediatric Gastroenterology, Kayseri, Turkiye
| | - Duran Arslan
- Erciyes University School of Medicine, Department of Pediatric Gastroenterology, Kayseri, Turkiye
| | - Halit Canatan
- Erciyes University School of Medicine, Department of Medical Biology, Kayseri, Turkiye; Betul-Ziya Eren Genome and Stem Cell Center, Erciyes University, Kayseri, Turkiye
| | - Ahmet Eken
- Erciyes University School of Medicine, Department of Medical Biology, Kayseri, Turkiye; Betul-Ziya Eren Genome and Stem Cell Center, Erciyes University, Kayseri, Turkiye.
| | - Ekrem Unal
- Erciyes University School of Medicine, Department of Pediatrics, Division of Pediatric Hematology and Oncology, Kayseri, Turkiye; Erciyes University, Institute of Health Sciences, Department of Blood Banking and Transfusion Medicine, Kayseri, Turkey; Hasan Kalyoncu University School of Health Sciences, Department of Nursing, Gaziantep, Turkiye; Medical Point Hospital Hematology and Oncology Clinic, Gaziantep, Turkiye.
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Donmez-Altuntas H, Sahin Ergul S, Altin-Celik P, Bulut K, Eci Roglu H, Uzen R, Sahin GG, Ozer NT, Temel S, Arikan TB, Esmaoglu A, Yuksel RC, Sungur M, Gundogan K. Gut barrier protein levels in serial blood samples from critically ill trauma patients during and after intensive care unit stay. Eur J Trauma Emerg Surg 2023; 49:2203-2213. [PMID: 37296330 DOI: 10.1007/s00068-023-02298-6] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
PURPOSE In an effort to better manage critically ill patients hospitalised in the intensive care unit (ICU) after experiencing multiple traumas, the present study aimed to assess whether plasma levels of intestinal epithelial cell barrier proteins, including occludin, claudin-1, junctional adhesion molecule (JAM-1), tricellulin and zonulin, could be used as novel biomarkers. Additional potential markers such as intestinal fatty acid-binding protein (I-FABP), D-lactate, lipopolysaccharide (LPS) and citrulline were also evaluated. We also aimed to determine the possible relationships between the clinical, laboratory, and nutritional status of patients and the measured marker levels. METHODS Plasma samples from 29 patients (first, second, fifth and tenth days in the ICU and on days 7, 30 and 60 after hospital discharge) and 23 controls were subjected to commercial enzyme-linked immunosorbent assay (ELISA) testing. RESULTS On first day (admission) and on the second day, plasma I-FABP, D-lactate, citrulline, occludin, claudin-1, tricellulin and zonulin levels were high in trauma patients and positively correlated with lactate, C-reactive protein (CRP), number of days of ICU hospitalisation, Acute Physiology and Chronic Health Evaluation II (APACHE II) score and daily Sequential Organ Failure Assessment (SOFA) scores (P < 0.05-P < 0.01). CONCLUSION The results of the present study showed that occludin, claudin-1, tricellulin and zonulin proteins, as well as I-FABP, D-lactate and citrulline, may be used as promising biomarkers for the evaluation of disease severity in critically ill trauma patients, despite the complexity of the analysis of various barrier markers. However, our results should be supported by future studies.
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Affiliation(s)
| | - Serap Sahin Ergul
- Division of Intensive Care Medicine, Department of Internal Medicine, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
- 100/2000 CoHE PhD Scholarship Program, Institute of Health Sciences, 38030, Kayseri, Turkey
| | - Pinar Altin-Celik
- Department of Medical Biology, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
- 100/2000 CoHE PhD Scholarship Program, Institute of Health Sciences, 38030, Kayseri, Turkey
| | - Kadir Bulut
- Division of Intensive Care Medicine, Department of Internal Medicine, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
| | - Hamiyet Eci Roglu
- Department of Medical Biology, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
- Health Services Vocational School, Alanya Alaaddin Keykubat University, 07425, Antalya, Turkey
| | - Ramazan Uzen
- Department of Medical Biology, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
- 100/2000 CoHE PhD Scholarship Program, Institute of Health Sciences, 38030, Kayseri, Turkey
| | - Gulsah Gunes Sahin
- Division of Intensive Care Medicine, Department of Internal Medicine, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
- 100/2000 CoHE PhD Scholarship Program, Institute of Health Sciences, 38030, Kayseri, Turkey
- Department of Nutrition and Dietetics, School of Health Sciences, Cappadocia University, 50000, Nevşehir, Turkey
| | - Nurhayat Tugra Ozer
- Division of Intensive Care Medicine, Department of Internal Medicine, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
- 100/2000 CoHE PhD Scholarship Program, Institute of Health Sciences, 38030, Kayseri, Turkey
| | - Sahin Temel
- Division of Intensive Care Medicine, Department of Internal Medicine, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
| | - Turkmen Bahadir Arikan
- Department of General Surgery, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
| | - Aliye Esmaoglu
- Department of Anaesthesiology and Reanimation, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
| | - Recep Civan Yuksel
- Division of Intensive Care Medicine, Department of Internal Medicine, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
| | - Murat Sungur
- Division of Intensive Care Medicine, Department of Internal Medicine, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
| | - Kursat Gundogan
- Division of Intensive Care Medicine, Department of Internal Medicine, Medical Faculty, Erciyes University, 38030, Kayseri, Turkey
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Kiranatlioglu-Firat F, Demir H, Cuce I, Altın-Celik P, Eciroglu H, Bayram F, Donmez-Altuntas H. Increased oxidative and chromosomal DNA damage in patients with ankylosing spondylitis: its role in pathogenesis. Clin Exp Med 2023; 23:1721-1728. [PMID: 36441439 DOI: 10.1007/s10238-022-00957-3] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 11/18/2022] [Indexed: 11/29/2022]
Abstract
Increased DNA damage has been suggested to contribute to the pathogenesis of chronic inflammatory diseases, but controlled studies are lacking in ankylosing spondylitis (AS). Therefore, we assessed oxidative stress, oxidative DNA damage, chromosomal DNA damage, cell proliferation and cell death in the peripheral blood lymphocytes of patients with AS as well as the possible role of DNA damage in the development of the disease. In total, 25 newly diagnosed AS patients who had not received anti-inflammatory agents and 25 healthy controls were recruited. Oxidative DNA damage was assessed by plasma 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels, and chromosomal DNA damage was assessed by the cytokinesis-block micronucleus cytome (CBMN-cyt) method. Compared to controls, the micronucleus (MN) frequencies, nucleoplasmic bridge (NPB) frequencies, nuclear bud (NBUD) frequencies, apoptotic cell frequencies, necrotic cell frequencies and plasma 8-OHdG levels were significantly higher in patients with AS (p < 0.001, p < 0.05, p < 0.01, p < 0.001, p < 0.001, and p < 0.001, respectively), and the metaphase cell numbers, binucleated (BN) cell frequencies and nuclear division index (NDI) values were significantly lower in patients with AS (p < 0.01, p < 0.001 and p < 0.001, respectively). Thus, the present findings suggested that oxidative stress, oxidative DNA damage, and chromosomal DNA damage may be involved in the pathogenesis of AS similar to other chronic inflammatory diseases. In addition, the increased plasma 8-OHdG levels, MN frequencies, NPB frequencies and NBUD frequencies in AS patients may reflect an increased cancer risk.
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Affiliation(s)
| | - Huseyin Demir
- Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Erciyes University, Kayseri, Turkey
- Department of Physical Medicine and Rehabilitation, Medical Palace Hospital, Kayseri, Turkey
| | - Isa Cuce
- Department of Physical Medicine and Rehabilitation, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Pinar Altın-Celik
- Department of Medical Biology, Faculty of Medicine, Erciyes University, 38030, Kayseri, Turkey
| | - Hamiyet Eciroglu
- Department of Medical Biology, Faculty of Medicine, Erciyes University, 38030, Kayseri, Turkey
- Vocational School of Health Services, Alanya Alaaddin Keykubat University, Antalya, Turkey
| | - Fahri Bayram
- Department of Internal Medicine, Division of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Hamiyet Donmez-Altuntas
- Department of Medical Biology, Faculty of Medicine, Erciyes University, 38030, Kayseri, Turkey.
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Uzen R, Bayram F, Dursun H, Kardas F, Cakir M, Cucer N, Eken A, Donmez-Altuntas H. Characterization of peripheral blood T follicular helper (TFH) cells in patients with type 1 Gaucher disease and carriers. Blood Cells Mol Dis 2023; 100:102728. [PMID: 36738539 DOI: 10.1016/j.bcmd.2023.102728] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 01/25/2023] [Accepted: 01/25/2023] [Indexed: 02/05/2023]
Abstract
BACKGROUND Gaucher disease (GD) is the most common autosomal recessive lipid storage disease. In this study, the changes in TFH cells and IL-4 and IL-21 cytokines in blood samples of GD patients, carriers and healthy volunteers were investigated. METHODS Two pretreatment type 1 GD patients, 20 currently treated type 1 GD patients, 6 carriers, and 27 healthy volunteers were enrolled in the study. TFH cell (CD45RA-CD4+CXCR5+) number, phenotype (PD1, ICOS expression), and cytokine production (IL-21, IL-4) were assessed via flow cytometric assays. RESULTS No significant differences were found between the groups with respect to the number, frequency and PD1 or ICOS expression of TFH cells between healthy controls, patients and carriers. However, IL-4+ TFH cells were significantly reduced both in percent and number in the treated GD patients compared with healthy controls (p < 0.05). Interestingly, the IL-21+ TFH cell number was increased in treated GD patients. When TFH cells were examined based on CXCR3 expression, the frequency of the PD1+Th17-Th2-like fraction (CXCR3-) was found to be significantly increased in treated GD patients. CONCLUSION To our knowledge, this is the first study to assess TFH cells in GD patients, and to show that the production of IL-4 and IL-21 by TFH cells and their subsets may be altered in type 1 GD patients.
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Affiliation(s)
- Ramazan Uzen
- Department of Medical Biology, Medical Faculty, Erciyes University, 38030 Kayseri, Turkey; 100/2000 CoHE PhD Scholarship Program, Institute of Health Sciences, Turkey.
| | - Fahri Bayram
- Department of Endocrinology and Metabolism, Medical Faculty, Erciyes University, 38030 Kayseri, Turkey
| | - Huseyin Dursun
- Department of Endocrinology and Metabolism, Medical Faculty, Erciyes University, 38030 Kayseri, Turkey
| | - Fatih Kardas
- Department of Pediatric Nutrition and Metabolism, Medical Faculty, Erciyes University, 38030 Kayseri, Turkey
| | - Mustafa Cakir
- Department of Medical Biology, Medical Faculty, Van Yuzuncu Yıl University, 65080 Van, Turkey
| | - Nurhan Cucer
- Department of Medical Biology, Medical Faculty, Erciyes University, 38030 Kayseri, Turkey
| | - Ahmet Eken
- Department of Medical Biology, Medical Faculty, Erciyes University, 38030 Kayseri, Turkey; Betül-Ziya Eren Genome and Stem Cell Research Center, Erciyes University, 38030 Kayseri, Turkey
| | - Hamiyet Donmez-Altuntas
- Department of Medical Biology, Medical Faculty, Erciyes University, 38030 Kayseri, Turkey; Betül-Ziya Eren Genome and Stem Cell Research Center, Erciyes University, 38030 Kayseri, Turkey
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Gorur L, Dolanbay M, Ozturk F, Canoz O, Donmez-Altuntas H. High-risk human papillomavirus in Turkish patients with clinically suspicious cervical lesions analyzed by multiplex-PCR. Indian J Med Res 2023; 156:373423. [PMID: 37006021 DOI: 10.4103/ijmr.ijmr_2335_20] [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] [Subscribe] [Scholar Register] [Indexed: 04/04/2023] Open
Abstract
Background & objectives Human papillomavirus (HPV) infection is known to be the main cause of cervical cancer. This study aimed to determine the prevalence of high-risk HPV genotypes in smear specimens taken from women who had normal or abnormal cytology using a multiplex PCR method. Methods The study included 270 women aged between 19 and 69 yr with or without suspicious cervical abnormalities. A Pap smear sample from each patient was cytologically examined, and HPV typing was performed using a multiplex fluorescent PCR method. Those who were high-risk HPV positive and had a normal or abnormal cytology were further evaluated by colposcopy and biopsy. Results The total HPV positivity was 43 per cent (116/270). HPV positivity in the patients with an abnormal cytology was 77 per cent (33/43), whereas it was only 37 per cent (83/227) in women with normal cytology, which showed a significant difference (P<0.05). HPV positivity was also related to the age group when all the subjects were considered (P<0.05), and the highest prevalence of HPV infection was in the 30-39 yr age group. High-risk HPV types 16, 18, 31, 35, 51 and 56 were more common in the normal cytology patients, whereas high-risk HPV types 16, 31, 35, 45, 58 and 68 were commonly found in the abnormal cytology patients. Interpretation & conclusions The determination of high-risk HPV genotypes in women with clinically suspicious cervical lesions should be conducted during an annual follow-up, irrespective of a normal or abnormal cytology by the age of 30 years or above.
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Affiliation(s)
- Levent Gorur
- Department of Medical Biology, Faculty of Medical, Erciyes University, Kayseri, Turkey
| | - Mehmet Dolanbay
- Department of Gynecology & Obstetrics, Faculty of Medical, Erciyes University, Kayseri, Turkey
| | - Figen Ozturk
- Department of Medical Pathology, Faculty of Medical, Erciyes University, Kayseri, Turkey
| | - Ozlem Canoz
- Department of Medical Pathology, Faculty of Medical, Erciyes University, Kayseri, Turkey
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Alsavaf MB, Verboon JM, Dogan ME, Azizoglu ZB, Okus FZ, Ozcan A, Dundar M, Eken A, Donmez-Altuntas H, Sankaran VG, Unal E. A novel missense mutation outside the DNAJ domain of DNAJC21 is associated with Shwachman-Diamond syndrome. Br J Haematol 2022; 197:e88-e93. [PMID: 35298850 DOI: 10.1111/bjh.18112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/18/2022] [Accepted: 02/15/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Mohammad Bilal Alsavaf
- Division of Pediatric Hematology, Oncology & HSCT Center, Department of Pediatrics, Erciyes University, Faculty of Medicine, Kayseri, Turkey.,Gevher Nesibe Genome and Stem Cell Institution, Betul Ziya Eren Genome and Stem Cell Center (GENKOK), Erciyes University, Faculty of Medicine, Kayseri, Turkey
| | - Jeffrey M Verboon
- Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.,Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Muhammet E Dogan
- Department of Medical Genetic, Erciyes University, Kayseri, Turkey
| | - Zehra Busra Azizoglu
- Gevher Nesibe Genome and Stem Cell Institution, Betul Ziya Eren Genome and Stem Cell Center (GENKOK), Erciyes University, Faculty of Medicine, Kayseri, Turkey.,Department of Medical Biology, Erciyes University, Faculty of Medicine, Kayseri, Turkey
| | - Fatma Zehra Okus
- Division of Pediatric Hematology, Oncology & HSCT Center, Department of Pediatrics, Erciyes University, Faculty of Medicine, Kayseri, Turkey.,University College of London, Institute of Immunity and Transplantation, Royal Free Hospital, London, UK
| | - Alper Ozcan
- Division of Pediatric Hematology, Oncology & HSCT Center, Department of Pediatrics, Erciyes University, Faculty of Medicine, Kayseri, Turkey
| | - Munis Dundar
- Department of Medical Genetic, Erciyes University, Kayseri, Turkey
| | - Ahmet Eken
- Gevher Nesibe Genome and Stem Cell Institution, Betul Ziya Eren Genome and Stem Cell Center (GENKOK), Erciyes University, Faculty of Medicine, Kayseri, Turkey.,Department of Medical Biology, Erciyes University, Faculty of Medicine, Kayseri, Turkey
| | | | - Vijay G Sankaran
- Division of Hematology/Oncology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.,Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Ekrem Unal
- Division of Pediatric Hematology, Oncology & HSCT Center, Department of Pediatrics, Erciyes University, Faculty of Medicine, Kayseri, Turkey.,Gevher Nesibe Genome and Stem Cell Institution, Betul Ziya Eren Genome and Stem Cell Center (GENKOK), Erciyes University, Faculty of Medicine, Kayseri, Turkey.,Department of Blood Banking and Transfusion Medicine, Health Science Institution, Erciyes University, Kayseri, Turkey
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Bitgen N, Bayram F, Hamurcu Z, Ozturk F, Simsek Y, Baskol G, Kurtsoy A, Donmez-Altuntas H. Chromosomal and oxidative DNA damage in non-functioning pituitary adenomas. Endokrynol Pol 2020; 72:97-103. [PMID: 33295635 DOI: 10.5603/ep.a2020.0084] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/09/2020] [Accepted: 10/12/2020] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Clinically non-functioning pituitary adenomas (NFPA) are common tumours of the pituitary gland and are mainly considered as benign. The primary aim of this study was to research the effects of NFPA on genome instability in patients with non-functioning pituitary adenoma by using the cytokinesis-block micronucleus cytome (CBMN-cyt) assay and 8-hydroxy- 2'-deoxyguanosine (8-OHdG) assay. The second objective of this study was to assess whether there is a relationship between age, pituitary adenoma diameters, 8-OHDG levels, CBMN site assay parameters, and tumour aggressiveness. MATERIAL AND METHODS The study was performed on 30 patients who had been diagnosed with NFPA and were admitted to the Department of Endocrinology and Metabolism, and 20 healthy subjects of similar age and sex. RESULTS Micronucleus (MN), nucleoplasmic bridges (NPBs), nuclear bud (NBUD) frequencies, and apoptotic and necrotic cell frequencies in patients with NFPA were found to be significantly higher than in control subjects, and plasma 8-OHdG levels in patients with NFPA were statistically significantly lower than control subjects in this study. CONCLUSIONS It is believed that this is the first study to evaluate the aggressiveness of tumour with chromosome/oxidative DNA damage in patients with NFPA. However, further studies are needed in order to understand the cause of NFPA aggression and to evaluate these patients in terms of risk of cancer.
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Affiliation(s)
- Nazmiye Bitgen
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey.
| | - Fahri Bayram
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Zuhal Hamurcu
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Figen Ozturk
- Department of Pathology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Yasin Simsek
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Gulden Baskol
- Department of Biochemistry, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Ali Kurtsoy
- Department of Brain Surgery, Faculty of Medicine, Erciyes University, Kayseri, Turkey
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Ozturk S, Donmez-Altuntas H, Ozturk F, Kurtsoy A, Gokay F, Simsek Y, Bayram F. The significance of estrogen receptors in acromegaly: Are they useful as predictors of prognosis and therapy regimen? Growth Horm IGF Res 2020; 55:101337. [PMID: 32795827 DOI: 10.1016/j.ghir.2020.101337] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 05/31/2020] [Accepted: 06/12/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVE In this study, we considered to assess the presence of estrogen receptors (ER) and the expression of estrogen receptor genes (ESR) in the surgical tissue samples of acromegaly patients and the control group patients with nonfunctioning adenoma and their association with disease activity. We also aimed to determine the significance of ER positivity in acromegaly patients and to find out whether it carries a potential to be used as a predictor of prognosis and therapy regimen in the future. DESIGN This study was conducted on a total of 67 patients over 18 years of age. The study group consisted of 34 patients with acromegaly and 33 patients with nonfunctioning pituitary adenoma. The pre- and post-operative basal pituitary hormone levels and magnetic resonance images (MRI) of all patients, as well as their remission status of all acromegaly patients were evaluated. Immunohistochemical (IHC) staining procedures for ER-α were performed on surgical tissue samples. Real-time quantitative polymerase chain reaction (RT-qPCR) method was used to determine the levels of ESR1 and ESR2 gene expressions. RESULTS We found that IHC staining for ER-α was positive in 31.3% and 45.5% of the patients with acromegaly and nonfunctioning adenoma respectively. There was no statistically significant difference of ER-α positivity, ER-α immunoreactivity score and ESR1/ESR2 gene expression levels among the study groups (p > .05). Nevertheless, the expression of ESR1 gene was found to be 0.26 times more, and the ESR2 gene to be 0.11 times less in the acromegaly group compared to those of the nonfunctioning adenoma group. Additionally, we detected the positivity of ER-α only in acromegaly patients who were in remission. An inverse association was found between the pre-operative insulin-like growth factor-1 (IGF-1) levels and the expressions of ESR1/ESR2 gene in acromegaly patients. So these results indicated that the high ESR1 and ESR2 gene expressions in acromegaly patients are associated to the decrease of pre-operative IGF-1 values. Also an inverse association was found between the pre-operative adenoma volume and ESR1 Ct values, means that increase in ESR1 gene expression is associated to the decrease of adenoma volume. CONCLUSIONS The current results may suggest the use of these parameters as useful prognostic markers because all ER-positive acromegaly patients were in remission and the high ESR1 and ESR2 gene expressions in acromegaly patients is associated to the decrease of pre-operative IGF-1 values. Our results need to be supported by further studies.
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Affiliation(s)
- Selma Ozturk
- Department of Internal Medicine, Bünyan State Hospital, Kayseri, Turkey; Department of Internal Medicine, Erciyes University Faculty of Medicine, Kayseri, Turkey.
| | | | - Figen Ozturk
- Department of Pathology, Erciyes University Faculty of Medicine, Kayseri, Turkey
| | - Ali Kurtsoy
- Department of Neurosurgery, Erciyes University Faculty of Medicine, Kayseri, Turkey
| | - Ferhat Gokay
- Department of Endocrinology and Metabolism, Kayseri City Hospital, Kayseri, Turkey; Department of Endocrinology and Metabolism, Kayseri Training and Research Hospital, Kayseri, Turkey
| | - Yasin Simsek
- Department of Endocrinology and Metabolism, Kayseri City Hospital, Kayseri, Turkey; Department of Endocrinology and Metabolism, Kayseri Training and Research Hospital, Kayseri, Turkey
| | - Fahri Bayram
- Department of Endocrinology and Metabolism, Erciyes University Faculty of Medicine, Kayseri, Turkey
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9
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Donmez-Altuntas H, Bayram F, Coskun-Demirkalp AN, Baspınar O, Kocer D, Toth PP. Therapeutic effects of statins on chromosomal DNA damage of dyslipidemic patients. Exp Biol Med (Maywood) 2019; 244:1089-1095. [PMID: 31426681 DOI: 10.1177/1535370219871895] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Statins are a group of cholesterol lowering drugs and frequently used in the therapy of dyslipidemia. Our knowledge of the impact of statin therapy on DNA damage is as yet rudimentary. In this study, we aimed to assess the possible (1) genotoxic, cytostatic, and cytotoxic effects of statins in peripheral blood lymphocytes by using the cytokinesis-block micronucleus cytome (CBMN-cyt) assay, and (2) oxidative DNA damage by measuring plasma 8-hydroxy-2′-deoxyguanosine (8-OHdG) levels in response to statin therapy. Thirty patients with dyslipidemia who had no chronic diseases and did not use any medicines that interfere lipid values and twenty control subjects were included in the study. Statin therapy was initiated at risk-stratified doses. Blood samples were taken before and after treatment with statins and from control subjects, and CBMN-cyt assay parameters and 8-OHdG levels were evaluated. The chromosomal DNA damage (micronuclei and nucleoplasmic bridges [NPBs]), cytostasis (nuclear division index [NDI]), and cytotoxicity (apoptotic and necrotic cell frequencies) were decreased in patients with dyslipidemia after statin treatment. No significant differences were found for 8-OHdG levels between patients with dyslipidemia before or after statin therapy. The total cholesterol and low-density lipoprotein-cholesterol levels showed positive correlations with NPB frequency in patients with dyslipidemia prior to statin treatment. The present study is the first to evaluate CBMN-cyt assay biomarkers and 8-OHdG levels in patients with dyslipidemia before and after treatment with statins. The observed reductions of chromosomal DNA damage and NDI values with statin treatment could represent an important and under-appreciated pleiotropic effect of these agents. Impact statement In literature, it is possible to find some in vitro cytokinesis-block micronucleus (CBMN) assay studies about human lymphocytes and statins. But, there are no data on CBMN-cytome (CBMN-cyt) assay parameters related to statin therapy in patients with dyslipidemia. The present study is the first to evaluate CBMN-cyt assay biomarkers and 8-OHdG levels in patients with dyslipidemia before treatment and after treatment with statins (5–10 mg/day rosuvastatin or 10–20 mg/day atorvastatin). In this study we show that statin therapy decreased chromosomal DNA damage (micronuclei and nucleoplasmic bridges) and nuclear division index (NDI) values in patients with dyslipidemia by possible molecular reasons independent of oxidative DNA damage. In addition, the decrease of chromosomal DNA damage and NDI values with statin treatment could be indicated by the association between statin use and reduced risk of cancer.
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Affiliation(s)
- Hamiyet Donmez-Altuntas
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri 38030, Turkey.,Betül-Ziya Eren Genome and Stem Cell Research Center, Erciyes University, Kayseri 38030, Turkey
| | - Fahri Bayram
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri 38030, Turkey
| | - Ayse N Coskun-Demirkalp
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri 38030, Turkey.,Mucur Vocational School of Health Services, Ahi Evran University, Kırşehir 40500, Turkey
| | - Osman Baspınar
- Department of Internal Diseases, Kayseri Education and Research Hospital, Health Sciences University, Kayseri 38080, Turkey
| | - Derya Kocer
- Department of Biochemistry, Kayseri Education and Research Hospital, Health Sciences University, Kayseri 38080, Turkey
| | - Peter P Toth
- The Johns Hopkins Ciccarone Center for the Prevention of Heart Disease, Baltimore, MD 21287, USA.,Preventive Cardiology, CGH Medical Center, Sterling, IL 61081, USA
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10
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Eken A, Yetkin MF, Okus FZ, Erdem S, Cakir M, Vural A, Donmez-Altuntas H, Mirza M, Canatan H. Fingolimod impacts innate lymphoid cell biology. The Journal of Immunology 2018. [DOI: 10.4049/jimmunol.200.supp.41.10] [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] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Group 3 Innate lymphoid cells (ILC3) resemble to Th17 cells in their production of effector cytokines and tissue localization. Th17 cells have been shown to be pathogenic in mouse MS models. Previous studies from others and our lab have shown that Sphingosine 1 phosphate 1 (S1P1) receptor impacts Th17 cell biology. S1P1 receptor agonist Fingolimod is used in the treatment of Multiple sclerosis (MS). To this day, however, the effects of fingolimod on human ILC populations have not been studied. In this study, using PBMCs from Fingolimod-receiving or control relapsing-remitting MS patients, combined with ex vivo culture system we characterized the impact of S1P1 agonists on ILC populations via Flow cytometry, real-time qPCR and ELISA. We report that human ILCs express S1P1 receptor, respond to it, as evident in reduced peripheral ILC cellularity in MS patients receiving Fingolimod. Also in culture, exposure to S1P1 agonists reduced gene expression and secretion of GMCSF and IFN-g by human ILC3 and ILC1, respectively. To our knowledge, this is the first report to study the impact of fingolimod on ILC populations in MS patients.
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11
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Eken A, Okus FZ, Patiroglu T, Erdem S, Karakukcu M, Cansever M, Donmez-Altuntas H, Canatan H, Oukka M, Topal E, Kiyim A, Karakoc E, Metin A, Reisli I, Uygun V, Baris S, Keles S, Ozen A, Karasu G, Unal E. Group 3 innate lymhoid cells are absent in DOCK8-defective HIES patients. The Journal of Immunology 2018. [DOI: 10.4049/jimmunol.200.supp.170.25] [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] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Innate lymphoid cell (ILC) subsets ILC1, ILC2 and ILC3 mirror image the functions helper CD4+ T cell subsets, Th1, Th2 and Th17, respectively; rely on similar transcription factors for their development, and produce similar effector cytokines. Thus, they have recently been shown to be crucial for protective immunity in mice. More importantly, in several chronic inflammatory diseases activated or increased frequency of ILCs have been reported in the circulation or affected tissues of patients. Our previous work with Dock8-defective Dock8pri/pri mice revealed that Dock8 is required for the development/function and survival of murine ILC3s. Thus Dock8pri/pri mice lacked ILC3s and was susceptible to Citrobacter rodentium infections. However to date, whether DOCK8 regulates ILC3 development or functions in humans has not been addressed. In the current study, using 11 DOCK8 mutant patients from across Turkey, we show, for the first time, that humans with DOKC8 deficiency lack peripheral ILC3s. Reduction in blood ILC3 could be verified by flow cytometry. Additionally, sorted total blood ILC population obtained from HIES patients with DOCK8 mutations shows diminished ILC3-specific Gm-csf, AhR and il23r gene expression in line with ILC3 loss. The defect is dramatic in ILC3s and less so in ILC2s in circulation. Flow cytometric examination of 11 patients revealed full restroration of ILC3s following hematopoietic stem cell transplantation. We also show that sorted peripheral ILC precursor population obtained from DOCK8 mutant patients has impaired capacity to proliferate in ILC1-ILC2-ILC3 polarizing conditions. This is the first report in the literature to show a selective deletion of ILC3s in HIES patients with DOCK8 mutations.
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12
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Bahar I, Elay G, Başkol G, Sungur M, Donmez-Altuntas H. Increased DNA damage and increased apoptosis and necrosis in patients with severe sepsis and septic shock. J Crit Care 2018; 43:271-275. [DOI: 10.1016/j.jcrc.2017.09.035] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 09/12/2017] [Accepted: 09/15/2017] [Indexed: 01/12/2023]
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13
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Gundogan K, Donmez-Altuntas H, Hamurcu Z, Akbudak IH, Sungur M, Bitgen N, Baskol G, Bayram F. Evaluation of chromosomal DNA damage, cytotoxicity, cytostasis, oxidative DNA damage and their relationship with endocrine hormones in patients with acute organophosphate poisoning. Mutat Res Genet Toxicol Environ Mutagen 2017; 825:1-7. [PMID: 29307370 DOI: 10.1016/j.mrgentox.2017.11.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 10/27/2017] [Accepted: 11/07/2017] [Indexed: 11/25/2022]
Abstract
Pesticides are commonly used compounds in agriculture. Especially, organophosphates (OPs) are among the extensively used pesticides. Therefore, OPs poisoning is common, especially in underdeveloped and developing countries. Primary aim of this study was to research the effects of acute OPs poisoning on genome instability in the individuals' lymphocytes with acute OPs poisoning both by using the cytokinesis-block micronucleus cytome (CBMN-cyt) assay to examine chromosome/genome damage, cell proliferation index and cell death rate and by using the plasma 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels to determine oxidative DNA damage. Secondary aim of this study was also to assess whether a relation exists between endocrine hormones and the genome damage in acute OPs poisoning. In the study, blood samples were analysed of 13 patients before and after treatment admitted to the Department of Intensive Care Unit with acute OPs poisoning and of 13 healthy subjects of similar age and sex. The present study demonstrates that genome damage (micronucleus; MN and nucleoplasmic bridges; NPBs frequencies), apoptotic and necrotic cell frequencies increased in lymphocytes of patients with acute OPs poisoning before treatment and decreased after treatment. The present study also show that CBMN cyt assay parameters and 8-OHdG levels could be affected by some endocrine hormones such as E2, fT3, fT4, GH, IGF-1, FSH, LH, TSH, PRL, but not be related to ACTH and tT levels in acute OPs poisoning. In conclusion, it is believed that this is the first study to evaluate the chromosomal/oxidative DNA damage, cell proliferation, cell death and their associations with endocrine hormones in acute OPs poisoning. These preliminary findings need to be supported by further studies with larger sample sizes.
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Affiliation(s)
- Kursat Gundogan
- Intensive Care Unit, Department of Internal Medicine, Medical Faculty, Erciyes University, Kayseri, Turkey
| | | | - Zuhal Hamurcu
- Department of Medical Biology, Medical Faculty, Erciyes University, Kayseri, Turkey
| | - Ismail Hakkı Akbudak
- Intensive Care Unit, Department of Internal Medicine, Medical Faculty, Erciyes University, Kayseri, Turkey
| | - Murat Sungur
- Intensive Care Unit, Department of Internal Medicine, Medical Faculty, Erciyes University, Kayseri, Turkey
| | - Nazmiye Bitgen
- Department of Chemical Technology, Technical Sciences Vocational School, Aksaray University, Aksaray, Turkey
| | - Gulden Baskol
- Department of Biochemistry, Medical Faculty, Erciyes University, Kayseri, Turkey
| | - Fahri Bayram
- Department of Endocrinology and Metabolism, Medical Faculty, Erciyes University, Kayseri, Turkey
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14
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Donmez-Altuntas H, Bayram F, Bitgen N, Ata S, Hamurcu Z, Baskol G. Increased Chromosomal and Oxidative DNA Damage in Patients with Multinodular Goiter and Their Association with Cancer. Int J Endocrinol 2017; 2017:2907281. [PMID: 28373882 PMCID: PMC5360991 DOI: 10.1155/2017/2907281] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 01/02/2017] [Accepted: 01/12/2017] [Indexed: 12/19/2022] Open
Abstract
Thyroid nodules are a common clinical problem worldwide. Although thyroid cancer accounts for a small percentage of thyroid nodules, the majority are benign. 8-Hydroxy-2'-deoxyguanosine (8-OHdG) levels are a marker of oxidative stress and play a key role in the initiation and development of a range of diseases and cancer types. This study evaluates cytokinesis-block micronucleus cytome (CBMN-cyt) assay parameters and plasma 8-OHdG levels and their association with thyroid nodule size and thyroid hormones in patients with multinodular goiter. The study included 32 patients with multinodular goiter and 18 age- and sex-matched healthy controls. CBMN-cyt assay parameters in peripheral blood lymphocytes of patients with multinodular goiter and controls were evaluated, and plasma 8-OHdG levels were measured. The micronucleus (MN) frequency (chromosomal DNA damage), apoptotic and necrotic cells (cytotoxicity), and plasma 8-OHdG levels (oxidative DNA damage) were significantly higher among patients with multinodular goiter. Our study is the first report of increased chromosomal and oxidative DNA damage in patients with multinodular goiter, which may predict an increased risk of thyroid cancer in these patients. MN frequency and plasma 8-OHdG levels may be markers of the carcinogenic potential of multinodular goiters and could be used for early detection of different cancer types, including thyroid cancer.
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Affiliation(s)
- Hamiyet Donmez-Altuntas
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
- *Hamiyet Donmez-Altuntas:
| | - Fahri Bayram
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Nazmiye Bitgen
- Department of Chemical Technology, Technical Sciences Vocational School, Aksaray University, Aksaray, Turkey
| | - Sibel Ata
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Zuhal Hamurcu
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Gulden Baskol
- Department of Biochemistry, Faculty of Medicine, Erciyes University, Kayseri, Turkey
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15
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Bitgen N, Donmez-Altuntas H, Bayram F, Cakir I, Hamurcu Z, Diri H, Baskol G, Senol S, Durak AC. Increased micronucleus, nucleoplasmic bridge, nuclear bud frequency and oxidative DNA damage associated with prolactin levels and pituitary adenoma diameters in patients with prolactinoma. Biotech Histochem 2015; 91:128-36. [PMID: 26720589 DOI: 10.3109/10520295.2015.1101163] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Prolactinoma is the most common pituitary tumor. Most pituitary tumors are benign, but they often are clinically significant. We investigated cytokinesis-block micronucleus cytome (CBMN cyt) assay parameters and oxidative DNA damage in patients with prolactinoma to assess the relations among age, prolactin level, pituitary adenoma diameter and 8-hydroxy-2'-deoxyguanosine (8-OHdG) level in patients with prolactinoma. We investigated 27 patients diagnosed with prolactinoma and 20 age- and sex-matched healthy controls. We measured CBMN cyt parameters and plasma 8-OHdG levels in peripheral blood lymphocytes of patients with prolactinoma and controls. The frequencies of micronucleus (MN), nucleoplasmic bridge, nuclear bud, apoptotic and necrotic cells, and plasma 8-OHdG levels in patients with prolactinoma were significantly greater than controls. MN frequency was correlated positively with age, prolactin levels and pituitary adenoma diameters in patients with prolactinoma. The increased chromosomal and oxidative DNA damage, and the positive correlation between MN frequency, prolactin levels and pituitary adenoma diameters may be associated with increased risk of cancer in patients with prolactinoma, because increased MN frequency is a predictor of cancer risk.
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Affiliation(s)
- N Bitgen
- a Department of Chemical Technology , Technical Sciences Vocational School, Aksaray University , Aksaray , Turkey
| | - H Donmez-Altuntas
- b Department of Medical Biology , Erciyes University , Kayseri , Turkey
| | - F Bayram
- c Department of Endocrinology and Metabolism , Erciyes University , Kayseri , Turkey
| | - I Cakir
- c Department of Endocrinology and Metabolism , Erciyes University , Kayseri , Turkey
| | - Z Hamurcu
- b Department of Medical Biology , Erciyes University , Kayseri , Turkey
| | - H Diri
- c Department of Endocrinology and Metabolism , Erciyes University , Kayseri , Turkey
| | - G Baskol
- d Department of Biochemistry , Erciyes University , Kayseri , Turkey
| | - S Senol
- e Department of Radiology , Faculty of Medicine, Erciyes University , Kayseri , Turkey
| | - A C Durak
- e Department of Radiology , Faculty of Medicine, Erciyes University , Kayseri , Turkey
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16
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Donmez-Altuntas H, Sahin F, Bayram F, Bitgen N, Mert M, Guclu K, Hamurcu Z, Arıbas S, Gundogan K, Diri H. Evaluation of chromosomal damage, cytostasis, cytotoxicity, oxidative DNA damage and their association with body-mass index in obese subjects. Mutat Res Genet Toxicol Environ Mutagen 2014; 771:30-6. [PMID: 25308439 DOI: 10.1016/j.mrgentox.2014.06.006] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 03/29/2014] [Accepted: 05/15/2014] [Indexed: 01/10/2023]
Abstract
Over-weight and obesity are serious problems that increase the risk not only for chronic diseases like diabetes and heart disease but also of various types of cancer. This study was conducted to evaluate cytokinesis-block micronucleus cytome (CBMN-cyt) assay parameters and plasma concentrations of 8-hydroxy-2'-deoxyguanosine (8-OHdG), and their relationship with age, body-mass index (BMI) and waist-to-hip ratio (WHR) in 83 obese, 21 over-weight and 21 normal-weight subjects. Frequencies of micronuclei (MN), nucleoplasmic bridges (NPB), nuclear buds (NBUD), and apoptotic and necrotic cells in lymphocytes of obese subjects were found to be significantly higher than those found in normal-weight and over-weight subjects (p<0.01 and p<0.05), whereas plasma concentrations of 8-OHdG in obese subjects were lower than those observed in normal-weight and over-weight subjects (p<0.05 and p<0.01, respectively). There was a negative correlation between age and frequency of necrotic cells and NDI (p<0.05), whereas there was no correlation between BMI, WHR, CBMN cyt assay parameters and plasma 8-OHdG in normal-weight subjects. In over-weight subjects, a negative correlation was observed between age and NDI (p<0.01) and a positive correlation between age and frequency of NPB (p<0.01) and between BMI and frequency of NBUD (p<0.05). In obese subjects, a negative correlation was observed between age and NDI (p<0.01) and between BMI and NDI (p<0.05), whereas no correlation was observed between WHR and CBMN-cyt assay parameters and plasma 8-OHdG. However, frequencies of MN, NPB, NBUD, apoptotic and necrotic cells in total over-weight/obese (p<0.01/p<0.05) and all subjects (p<0.01) increased with increasing BMI. The increase in genomic damage (MN, NPB and NBUD) in obese subjects and the positive correlation between genomic damage and BMI in total over-weight/obese subjects indicate that obesity increases genomic damage and may be associated with an increased risk of cancer, because an increase in MN frequency is a predictor of cancer risk.
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Affiliation(s)
| | - Fatma Sahin
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Fahri Bayram
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Nazmiye Bitgen
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Meral Mert
- Department of Endocrinology and Metabolism, Kayseri Education and Research Hospital, Kayseri, Turkey
| | - Kenan Guclu
- Department of Biochemistry, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Zuhal Hamurcu
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Sülbiye Arıbas
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Kursat Gundogan
- Intensive Care Unit, Department of Internal Medicine, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Halit Diri
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
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Bayram F, Bitgen N, Donmez-Altuntas H, Cakir I, Hamurcu Z, Sahin F, Simsek Y, Baskol G. Increased genome instability and oxidative DNA damage and their association with IGF-1 levels in patients with active acromegaly. Growth Horm IGF Res 2014; 24:29-34. [PMID: 24382376 DOI: 10.1016/j.ghir.2013.12.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [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] [Received: 02/11/2013] [Revised: 11/06/2013] [Accepted: 12/05/2013] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The objectives of this study were to assess cytokinesis-block micronucleus cytome (CBMN Cyt) assay parameters and also oxidative DNA damage in patients with active acromegaly and controls and to assess the relationship between age, serum insulin-like growth factor 1 (IGF-1) levels, pituitary adenoma diameters, 8-hydroxy-2'-deoxyguanosine (8-OHdG) levels and CBMN Cyt assay parameters in patients with active acromegaly. DESIGN The study population included 30 patients with active acromegaly and 30 age- and sex-matched healthy controls. CBMN Cyt assay parameters in peripheral blood lymphocytes of patients with active acromegaly and controls were evaluated and plasma 8-OHdG levels were measured. RESULTS Frequencies of micronucleus (MN), nucleoplasmic bridges (NPBs) and nuclear buds (NBUDs) in lymphocytes of patients with acromegaly were found to be significantly higher than those in controls (p<0.001, p<0.001, p<0.001, respectively). The frequencies of apoptotic and necrotic cells in lymphocytes of patients with acromegaly were found to be significantly higher than those in controls (p<0.001 and p<0.001 respectively). No statistically significant differences in the number of cells in metaphase, the number of bi-nucleated cells (M2), the number of tri-nucleated cells (M3), the number of tetra-nucleated cells (M4) and nuclear division index (NDI) values were observed between patients and controls (p>0.05). Plasma 8-OHdG (ng/ml) levels in patients with acromegaly were found to be significantly higher than those in controls (p<0.005). MN frequency in the lymphocytes of patients with acromegaly increased with elevated serum IGF-1 levels (p<0.05), whereas the number of NPBs and the frequency of apoptotic cells decreased with elevated serum IGF-1 levels (p<0.01 and p<0.05 respectively). CONCLUSIONS Both the increase in chromosomal/oxidative DNA damage and the positive association between MN frequency and serum IGF-1 levels may predict an increased risk of malignancy in acromegalic patients. Long-term follow-up of patients with acromegaly will be necessary to establish the degree of cancer risk in this population.
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Affiliation(s)
- Fahri Bayram
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Nazmiye Bitgen
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | | | - Ilkay Cakir
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Zuhal Hamurcu
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Fatma Sahin
- Department of Medical Biology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Yasin Simsek
- Department of Endocrinology and Metabolism, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Gulden Baskol
- Department of Biochemistry, Faculty of Medicine, Erciyes University, Kayseri, Turkey
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Karaman H, Karaman A, Donmez-Altuntas H, Bitgen N, Hamurcu Z, Oguz A, Karakukcu C. Investigation of genome instability in patients with non-alcoholic steatohepatitis. World J Gastroenterol 2013; 19:5295-5301. [PMID: 23983432 PMCID: PMC3752563 DOI: 10.3748/wjg.v19.i32.5295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 03/22/2013] [Accepted: 06/04/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the occurrence of micronucleus (MN), nucleoplasmic bridges (NPBs) and nuclear buds (NBUDs) in the mitogen-stimulated lymphocytes of patients with non-alcoholic steatohepatitis (NASH).
METHODS: The study was performed in 25 (9 females, 16 males) patients newly diagnosed with NASH, and 25 healthy subjects of similar ages and genders were used as a control group. None of the controls was known to be receiving any drugs for medical or other reasons or using alcohol. Hepatosteatosis was further excluded by abdominal ultrasound imaging in the control group. The numbers of MN, NPBs and NBUDs scored in binucleated (BN) cells were obtained from the mitogen-stimulated lymphocytes of patients and control subjects. Statistical comparisons of the numbers of BN cells with MN, NPBs and NBUDs and ages between the patients with NASH and control subjects were performed.
RESULTS: The mean ages of the patients and the control group were 41.92 ± 13.33 and 41.80 ± 13.09 years (P > 0.05), respectively. The values of the mean body mass index (BMI), HOMA-IR, hemoglobin, creatinin, aspartate aminotransferase, alanine aminotransferase, triglyceride, high density lipoprotein, and low density lipoprotein were 31.19 ± 4.62 kg/m2vs 25.07 ± 4.14 kg/m2, 6.71 ± 4.68 vs 1.40 ± 0.53, 14.73 ± 1.49 g/dL vs 14.64 ± 1.30 g/dL, 0.74 ± 0.15 mg/dL vs 0.80 ± 0.13 mg/dL, 56.08 ± 29.11 U/L vs 16.88 ± 3.33 U/L, 92.2 ± 41.43 U/L vs 15.88 ± 5.88 U/L, 219.21 ± 141.68 mg/dL vs 102.56 ± 57.98 mg/dL, 16.37 ± 9.65 mg/dL vs 48.72 ± 15.31 mg/dL, and 136.75 ± 30.14 mg/dL vs 114.63 ± 34.13 mg/dL in the patients and control groups, respectively. The total numbers and frequencies of BN cells with MN, NPBs and NBUDs, which were scored using the CBMN cytome assay on PHA-stimulated lymphocytes, were evaluated in the patients with NASH and control group. We found significantly higher numbers of MN, NPBs and NBUDs in the BN cells of patients with NASH than in those of the control subjects (21.60 ± 9.32 vs 6.88 ± 3.91; 29.28 ± 13.31 vs 7.84 ± 3.96; 15.60 ± 5.55 vs 4.20 ± 1.63, respectively, P < 0.0001).
CONCLUSION: The increased numbers of MN, NPBs and NBUDs observed in the lymphocytes obtained from patients with NASH may reflect genomic instability.
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Donmez-Altuntas H, Gokalp-Yildiz P, Bitgen N, Hamurcu Z. Evaluation of genotoxicity, cytotoxicity and cytostasis in human lymphocytes exposed to patulin by using the cytokinesis-block micronucleus cytome (CBMN cyt) assay. Mycotoxin Res 2012. [PMID: 23192667 DOI: 10.1007/s12550-012-0153-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [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]
Abstract
Patulin (PAT) is a fungal secondary metabolite commonly present in apples and apple products. In the present study, PAT was evaluated for its genotoxic, cytotoxic and cytostatic effects to human peripheral blood lymphocytes by using the cytokinesis-block micronucleus cytome (CBMN Cyt) assay. Lymphocyte cultures were treated with PAT at the following concentrations, 0.1, 0.3, 0.5, 1.0, 2.5, 5.0, and 7.5 μM, as well as 0.5 μM mitomycin c (MMC) as a positive control and dimethyl sulfoxide (DMSO) as a vehicle control. PAT was found to induce nucleoplasmic bridges (NPBs) at 5.0 and 7.5 μM concentrations (P < 0.05), apoptotic cells at 0.1, 1.0, 5.0 μM (P < 0.05), 7.5 μM concentrations (P < 0.01) and necrotic cells at 0.3 and 2.5 μM (P < 0.05), 5.0 and 7.5 μM (P < 0.01) concentrations in human lymphocytes. The 2.5, 5.0, and 7.5 μM PAT concentrations also led to a clear decrease in the nuclear division index (NDI) (P < 0.05). PAT caused a significant dose-dependent increase in the number cells of NPBs, in the frequency of apoptotic and necrotic cells, and a significant dose-dependent decrease in the NDI values in lymphocytes. These results indicate that PAT at high concentrations is genotoxic, cytotoxic and cytostatic in cultured human lymphocytes.
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Affiliation(s)
- Hamiyet Donmez-Altuntas
- Faculty of Medicine, Department of Medical Biology, Erciyes University, 38039, Kayseri, Turkey.
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Donmez-Altuntas H, Bitgen N. Evaluation of the genotoxicity and cytotoxicity in the general population in Turkey by use of the cytokinesis-block micronucleus cytome assay. Mutation Research/Genetic Toxicology and Environmental Mutagenesis 2012; 748:1-7. [DOI: 10.1016/j.mrgentox.2012.05.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 04/06/2012] [Accepted: 05/18/2012] [Indexed: 11/16/2022]
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Hamurcu Z, Cakir I, Donmez-Altuntas H, Bitgen N, Karaca Z, Elbuken G, Bayram F. Micronucleus evaluation in mitogen-stimulated lymphocytes of patients with acromegaly. Metabolism 2011; 60:1620-6. [PMID: 21550080 DOI: 10.1016/j.metabol.2011.03.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [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] [Received: 12/24/2010] [Revised: 03/17/2011] [Accepted: 03/18/2011] [Indexed: 01/11/2023]
Abstract
Acromegaly is a syndrome characterized by a sustained elevation of circulating growth hormone and insulin-like growth factor-1 (IGF-1). Insulin-like growth factor-1 is a potent mitogen and has a role in the transformation of normal cells to malignant cells. This study aims to evaluate the spontaneous micronucleus (MN) frequency by using the cytokinesis-block MN assay to determine genetic damage in the lymphocytes of patients with acromegaly. The study was carried out in 20 patients who had active acromegaly and in 20 age- and sex-matched healthy controls. The MN values were measured in binucleated cells obtained from mitogen-stimulated lymphocytes of patients and control subjects. The distribution of binucleated cells with 1, 2, 3, or more MNs was also measured. We found significantly higher MN frequency values in the lymphocytes of acromegalic patients than in those of the control subjects (2.23 ± 0.68 vs 1.03 ± 0.54, P = .001). The MN frequency increased with increasing IGF-1 levels of acromegalic patients (P = .036, R = 0.47). We observed that the number of binucleated cells with 2 MNs was higher for the majority of patients with acromegaly than for control subjects. Furthermore, the receiver operating characteristic curve (area under the curve = 0.914, P < .0001) was calculated to assess the discriminative power of the MN frequency. Our results indicate that increased MN frequency in the lymphocytes of patients with acromegaly may reflect genomic instability and this increased MN frequency may be associated with elevated levels of circulating growth hormone and IGF-1.
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Affiliation(s)
- Zuhal Hamurcu
- Department of Medical Biology, Medical Faculty, Erciyes University, Kayseri, Turkey.
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Bonassi S, Coskun E, Ceppi M, Lando C, Bolognesi C, Burgaz S, Holland N, Kirsh-Volders M, Knasmueller S, Zeiger E, Carnesoltas D, Cavallo D, da Silva J, de Andrade VM, Demircigil GC, Odio AD, Donmez-Altuntas H, Gattas G, Giri A, Giri S, Gómez-Meda B, Gómez-Arroyo S, Hadjidekova V, Haveric A, Kamboj M, Kurteshi K, Martino-Roth MG, Montoya RM, Nersesyan A, Pastor-Benito S, Salvadori DMF, Shaposhnikova A, Stopper H, Thomas P, Torres-Bugarín O, Yadav AS, González GZ, Fenech M. The HUman MicroNucleus project on eXfoLiated buccal cells (HUMNXL): The role of life-style, host factors, occupational exposures, health status, and assay protocol. Mutation Research/Reviews in Mutation Research 2011; 728:88-97. [DOI: 10.1016/j.mrrev.2011.06.005] [Citation(s) in RCA: 242] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Accepted: 06/30/2011] [Indexed: 11/30/2022]
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Donmez-Altuntas H, Sut Z, Ferahbas A, Hamurcu Z, Demirtas H. Increased micronucleus frequency in phytohaemagglutinin-stimulated blood cells of patients with vitiligo. J Eur Acad Dermatol Venereol 2008; 22:162-7. [PMID: 18211408 DOI: 10.1111/j.1468-3083.2007.02356.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Vitiligo is a relatively common, acquired pigmentary disorder characterized by areas of depigmented skin resulting from loss of melanocytes in the epidermis. Although several hypotheses have been proposed for the aetiology and pathogenesis of vitiligo, the cause of vitiligo remains unclear. OBJECTIVE To evaluate spontaneous micronucleus (MN) frequency using the cytokinesis block MN assay to determine damages at the DNA or chromosome level in phytohaemagglutinin (PHA)-stimulated blood cells of patients with vitiligo and healthy control subjects. METHODS Peripheral blood samples were obtained and cultured from 21 patients with vitiligo (mean age: 21.48 +/- 9.78 years) and 21 age- and sex-matched healthy control subjects (mean age: 21.52 +/- 9.80 years). MN values were scored in binucleated cells obtained from whole-blood cultures of patients and control subjects. RESULTS MN frequencies (mean +/- SD) in PHA-stimulated blood cells of patients with vitiligo and control subjects were 0.94 +/- 0.58 and 0.58 +/- 0.32, respectively. Compared with control subjects, MN frequencies of patients with vitiligo were found significantly higher than those of the control subjects (P = 0.012). CONCLUSION Our results indicate unexpectedly some chromosomal/DNA damage in whole-blood cultures of patients with vitiligo. We do not know, however, if these chromosome/DNA instabilities observed in the cells of vitiligo patients resulted from the cause or from the consequences of the disorder.
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Affiliation(s)
- H Donmez-Altuntas
- Department of Medical Biology, Medical Faculty, Erciyes University, Kayseri, Turkey.
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Imamoglu N, Yerer MB, Donmez-Altuntas H, Saraymen R. Erythrocyte antioxidant enzyme activities and lipid peroxidation in the erythrocyte membrane of stainless-steel welders exposed to welding fumes and gases. Int J Hyg Environ Health 2008; 211:63-8. [PMID: 17400508 DOI: 10.1016/j.ijheh.2007.02.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2006] [Revised: 12/29/2006] [Accepted: 02/12/2007] [Indexed: 10/23/2022]
Abstract
The erythrocyte antioxidant system (superoxide dismutase, SOD; catalase, CAT) and lipid peroxidation (malondialdehyde, MDA) in the erythrocyte membrane were studied in workers continously exposed to welding fumes and gases, which are thought to be oxidant pollutants. Thirty-five welders using the manual metal arc method on stainless steel and 30 controls were studied. Plasma chromium (Cr), manganese (Mn), and cupper (Cu) levels were determined by atomic absorption spectrophotometer (AAS). The erythrocyte antioxidant system activity and lipid peroxidation in the erythrocyte membrane were evaluated. Not only the possible effects of welding fumes but also the effects of smoking were considered. The plasma concentrations of Cr, Mn, and Cu for the exposed welders were significantly higher compared to the control subjects (p<0.001, p<0.01, p<0.001, respectively,). The erythrocyte CAT (p<0.05) and SOD (p<0.05) enzyme activities were significantly higher in the welders but there were not any significant changes in the MDA levels which reflect the lipid peroxidation in the erythrocyte membrane (p>0.05). Smoking has increased the SOD activity in both controls (p<0.05) and welders (p<0.01) and increased the CAT activity in control subjects (p<0.05). Moreover, regardless of smoking, there were some significant correlations between the duration of the exposure to welding fumes and antioxidant defence system (SOD: p<0.05; CAT: p<0.05). The synergistic effects of smoking and other risk factors (welding fumes and gases), which had been shown previously by some clinical data should also be taken into account. As a consequence, the welders should be warned and informed of the synergistic effects of smoking on the adverse effect of welding fumes and gases.
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Affiliation(s)
- Nalan Imamoglu
- Erciyes University, Halil Bayraktar Health Services Vocational College, 38039 Kayseri, Turkey.
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Hamurcu Z, Donmez-Altuntas H, Borlu M, Demirtas H, Ascioglu O. Micronucleus frequency in the oral mucosa and lymphocytes of patients with Behcet's disease: reply from authors. Clin Exp Dermatol 2006. [DOI: 10.1111/j.1365-2230.2006.02084.x] [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: 11/27/2022]
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Hamurcu Z, Demirtas H, Patiroglu T, Kumandas S, Imamoglu N, Ozkul Y, Donmez-Altuntas H. Age-dependent decreases in mitogen-stimulation level and RNA content in peripheral blood mononuclear cells of down syndrome patients. Cytometry 2006; 72:43-8. [PMID: 17041944 DOI: 10.1002/cyto.b.20139] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE The aim of the present study was to determine whether or not the phytohemagglutinin (PHA)-activated proliferation and average RNA content in peripheral blood mononuclear cells (PBMC) of Down syndrome (DS) patients change with age. METHOD Stimulated portion of PBMC and total RNA levels in these cells after 72 h of PHA stimulation from 38 DS patients were compared with 28 age-matched healthy controls using flow cytometric measurement. RESULTS Decreased ratio of PBMC from DS patients undergoes mitogenic stimulation with age (r = -0.84, P = 0.000). This decrease is not observed in the cells of control individuals (r = 0.03, P = 0.869). Stimulated PBMC in infants with DS have higher level of RNA contents compared to controls (Z = 2.227, P = 0.026). While RNA content in mitogen-stimulated PBMC of DS decreased progressively and significantly with age (r = -0.70, P = 0.000), no significant age-related change in RNA content was found among the cells of healthy individuals in the range of 0-27 year old (r = 0.275, P = 0.157, P > 0.05). CONCLUSION Age-dependent decreases in mitogen-activated proliferation ratio and average RNA content of PBMC from DS patients appear as regular events. These results may contribute to the explanation of the immune deficiency seen in DS patients since the PHA-stimulated cells are principally T-lymphocytes. This is the first report on the decrease in PHA-stimulated proliferation ratio (stimulability) and RNA level in PBMC of DS patients in relation to age.
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Affiliation(s)
- Zuhal Hamurcu
- Department of Medical Biology, Medical Faculty, Erciyes University, 38039 Kayseri, Turkey.
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Imamoglu N, Demirtas H, Donmez-Altuntas H, Ilten A. Higher NORs-expression in lymphocyte of trisomy 21 babies/children: In vivo evaluation. Micron 2005; 36:503-7. [PMID: 15993095 DOI: 10.1016/j.micron.2005.05.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2005] [Revised: 05/10/2005] [Accepted: 05/11/2005] [Indexed: 01/16/2023]
Abstract
Extra chromosome 21 of Down syndrome (DS) or trisomy 21 patients contains an average of 40 extra copies of rRNA genes and the in vivo regulation of these genes is not known. The objective of this work is to compare the NORs expression in interphase nuclei in non-stimulated lymphocytes of DS patients and healthy controls. Because the AgNOR staining is the indicator of the active rRNA genes, comparison of the image analysis values of AgNORs area between DS's and healthy controls' interphase lymphocytes is considered to be sufficient to evaluate the level of rDNA activities in the two groups. The Nucleolus Organizer Regions area/Total Nuclear area (NORa/TNa) was calculated using a computer program designed by us. 100 consecutive NORa/TNa per individual were evaluated. We report that 24 DS children's peripheral lymphocytes show significantly higher NORa/TNa mean value (6.32 +/- 1.77%) than that of the 20 healthy controls' cells (5.31 +/- 1.34%) (2-tailed Mann-Whitney U test, z = 19.4, P = 0.000). The same is true for the nucleolus (AgNOR spot) number per nucleus. The mean value of nucleoli number per nucleus in DS lymphocytes was significantly higher than that of the controls: z = 14.6, P = 0.000. In conclusion, extra rRNA genes on the chromosome 21 are not down-regulated in DS patients' lymphocytes. Rather, extra NORs expressions in 'in vivo' condition contribute to the increase of AgNORs area and AgNOR spots number per nucleus. This is the first work on the comparison of NORs activities in resting (non-stimulated) interphase lymphocytes between DS and healthy controls.
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Affiliation(s)
- Nalan Imamoglu
- Erciyes University, Medical Faculty, Medical Biology, Campus, Tibbi Biyoloji, Kayseri, Turkey.
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Imamoglu N, Demirtas H, Donmez-Altuntas H, Hamurcu Z, Ilten A. NOR expression increases on metaphase chromosomes of down syndrome lymphocytes in concordance with mitogen concentration in culture medium. Cytometry 2005; 66:36-9. [PMID: 15800881 DOI: 10.1002/cyto.b.20050] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Regulation of nucleolus organizer region (NOR) expression in trisomy 21 (Down syndrome [DS]) cells is not fully explained. This work compared NOR expression on metaphase chromosomes in gradiently stimulated lymphocytes from DS patients with those from healthy controls. METHOD Conventional peripheral blood culture (72 h) and chromosomal preparation procedures were used except that blood samples from each individual were cultivated in the same but gradiently increasing concentrations (0.37, 0.75, 1.48, and 2.21 ml) of phytohemagglutinin (PHA) per 100 ml of medium. One hundred consecutive metaphases per concentration were analyzed for scoring the means of the active NORs bearing chromosomes (AgNOR+ chromosome) per individual and per concentration. RESULTS In contrast to healthy controls (n=24), AgNOR+ chromosomal number in lymphocytes from 30 DS patients increased in concordance to the gradient of PHA concentration in the culture medium. CONCLUSION DS lymphocytes do not downregulate their NOR expression in the limit of control cells. This in vitro result may serve as a clue for the explanation of the DS phenotype due to the wasted energy in producing unnecessary rRNA transcripts and AgNOR proteins in utero during organogenesis. These results also indicate that precautions must be used in routine work of NOR evaluation/interpretation in DS lymphocytes.
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Affiliation(s)
- Nalan Imamoglu
- Department of Medical Biology, Medical Faculty, Erciyes University, Kayseri, Turkey.
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Ferahbas A, Donmez-Altuntas H, Hamurcu Z, Aktas E, Utas S. Micronucleus evaluation in mitogen-stimulated lymphocytes of narrow-band (311 nm TL01) UVB-treated patients. Photodermatol Photoimmunol Photomed 2004; 20:81-5. [PMID: 15030592 DOI: 10.1111/j.1600-0781.2004.00086.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Narrow-band UVB (311 nm) lamps (TL01) are being increasingly used for phototherapy of psoriasis and other dermatoses, for their excellent effect compared with broad-band UVB sources and photochemotherapy. It is acknowledged that the TL01 lamp is probably two to three times more carcinogenic per minimum erythema dose than broad-band UVB, but the cumulative dose is considerably less than broadband UVB sources. Micronucleus (MN) test is used to detect both clastogenic (breaking) and aneugenic (abnormal segregation) effect of physical/chemical agents on chromosomes. The aim of this study is to evaluate MN frequencies in mitogen-stimulated lymphocytes of narrow-band UVB-treated patients. METHODS Frequency of micronuclei in 72 h cultivated/mitogen-stimulated lymphocytes of 36 patients (age 7-73 years, mean+/-SD: 25.33+/-18.54) have been evaluated at pretreatment and after 20, 40, 60 sessions of narrowband UVB treatment. RESULTS While the beginning MN frequency +/-SD (%) was 1.07+/-0.63, it increased to 1.47+/-0.92, 1.47+/- 0.77, 1.41+/-0.31 corresponding, respectively, to 20, 40, 60 sessions. These sessions reciprocally correspond to 0.85+/-0.23, 2.97+/-0.72, 5.68+/-1.46 J/cm(2) doses of narrow-band UVB. Difference of MN frequency was statistically significant (P=0.002). Significant differences have been observed between the initial MN frequency and after that of 20, 40, 60 sessions (P=0.001, 0.004, 0.002, respectively). CONCLUSIONS The results of this study show that narrow-band UVB treatment causes a detectable chromosome damaging effect.
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Affiliation(s)
- Ayten Ferahbas
- Department of Dermatology, Medical Faculty, Erciyes University, TR-3809, Kayseri, Turkey.
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