Investigation of the Association Between Chronic Hepatitis B and C Infections and TNF-alpha(-308) Gene Polymorphism

Cytokines and genetic factors play important roles in the pathogenesis of chronic hepatitis B (CHB) and chronic hepatitis C (CHC) infections. Variations in cytokine genes may effect the gene expression and may lead to changes in the clinical manifestations of diseases. One of the single nucleotide polymorphisms in the promoter region of tumor necrosis factor-alpha (TNF-alpha) gene is the polymorphism at -308. position which was investigated in many studies by means of its relationship between CHB and CHC infections, however their results are incompatible. Furthermore, there is no sufficient data on this subject in our country. This study was aimed to determine the relationship between TNF-a(-308) gene polymorphism with CHB and CHC infections. A total of 271 patients with chronic hepatitis and 181 healthy subjects were included in the study. Of them 167 were CHB cases (67 female, 100 male; age range 18-74 years, mean age: 40.23 +/- 13.09) and 95 controls for CHB group (46 female, 49 male; mean age: 36.41 +/- 15.0 years), while 104 were CHC cases (63 female, 41 male; age range: 25-79 years, mean age: 52.8 +/- 12.6) and 86 controls for CHC group (41 female, 45 male; mean age: 36.4 +/- 14.9 years). After the isolation of genomic DNA from blood samples of the patient and control groups, TNF-alpha(-308)G/A (rs 1800629) polymorphism was investigated by using the real-time polymerase chain reaction from the obtained DNAs. Among CHB group, TNF-alpha(-308) GG, GA, AA genotypes were detected in 126 (75.4%), 38 (22.8%) and 3 (1.8%) of the patients, respectively, while these numbers were 84 (88.4%), 11 (11.6%) and 0 (0%) in control group, respectively. Among CHC group, TNF-a(-308) GG, GA, AA genotypes were detected in 37 (35.6%), 28 (26.9%) and 39 (37.5%) of the patients, respectively, while these numbers were 38 (44.2%), 8 (9.3%) and 40 (46.5%) in control group, respectively. The frequency of GA genotype was significantly higher in both patient groups compared to the control groups (p=0.024 for CHB and p= 0.006 for CHC). When the distribution of allele frequencies of TNF-alpha(-308)G/A polymorphism was evaluated in the patients and control groups, it was noted that G allele was found to be high in CHB patients comparing with controls (94.2% vs 86.8%), however A allele was identified to be lower than controls (5.8% vs 13.2%) (p= 0.008). In contrast, there was no significant difference in terms of allele frequency compared with CHC patients and the control group (p= 0.969). In conclusion, our data in accordance with the results of many studies in literature, determined that TNF-alpha(-308) polymorphisms can influence the chronicity of hepatitis B and C infections. Further studies on this subject would contribute to the elucidation of the molecular mechanisms of chronic hepatitis B and C diseases.

Yazar Borekci, Gulay
Aras, Nurcan
Kandemir, Ozlem
Yalin, Serap
Celik, Sevim Karakas
Berkoz, Mehmet
Yayın Türü Article
Tek Biçim Adres https://hdl.handle.net/20.500.12628/2830
Tek Biçim Adres 10.5578/mb.20953
Konu Başlıkları Chronic hepatitis 8
chronic hepatitis C
TNF-alpha-308
polymorphism
Koleksiyonlar Araştırma Çıktıları | WoS | Scopus | TR-Dizin | PubMed | SOBİAD
PubMed İndeksli Yayınlar Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu
Dergi Adı MIKROBIYOLOJI BULTENI
Dergi Cilt Bilgisi 50
Dergi Sayısı 2
Sayfalar 236 - 244
Yayın Yılı 2016
Eser Adı
[dc.title]
Investigation of the Association Between Chronic Hepatitis B and C Infections and TNF-alpha(-308) Gene Polymorphism
Yazar
[dc.contributor.author]
Borekci, Gulay
Yazar
[dc.contributor.author]
Aras, Nurcan
Yazar
[dc.contributor.author]
Kandemir, Ozlem
Yazar
[dc.contributor.author]
Yalin, Serap
Yazar
[dc.contributor.author]
Celik, Sevim Karakas
Yazar
[dc.contributor.author]
Berkoz, Mehmet
Yayın Yılı
[dc.date.issued]
2016
Yayıncı
[dc.publisher]
ANKARA MICROBIOLOGY SOC
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
Cytokines and genetic factors play important roles in the pathogenesis of chronic hepatitis B (CHB) and chronic hepatitis C (CHC) infections. Variations in cytokine genes may effect the gene expression and may lead to changes in the clinical manifestations of diseases. One of the single nucleotide polymorphisms in the promoter region of tumor necrosis factor-alpha (TNF-alpha) gene is the polymorphism at -308. position which was investigated in many studies by means of its relationship between CHB and CHC infections, however their results are incompatible. Furthermore, there is no sufficient data on this subject in our country. This study was aimed to determine the relationship between TNF-a(-308) gene polymorphism with CHB and CHC infections. A total of 271 patients with chronic hepatitis and 181 healthy subjects were included in the study. Of them 167 were CHB cases (67 female, 100 male; age range 18-74 years, mean age: 40.23 +/- 13.09) and 95 controls for CHB group (46 female, 49 male; mean age: 36.41 +/- 15.0 years), while 104 were CHC cases (63 female, 41 male; age range: 25-79 years, mean age: 52.8 +/- 12.6) and 86 controls for CHC group (41 female, 45 male; mean age: 36.4 +/- 14.9 years). After the isolation of genomic DNA from blood samples of the patient and control groups, TNF-alpha(-308)G/A (rs 1800629) polymorphism was investigated by using the real-time polymerase chain reaction from the obtained DNAs. Among CHB group, TNF-alpha(-308) GG, GA, AA genotypes were detected in 126 (75.4%), 38 (22.8%) and 3 (1.8%) of the patients, respectively, while these numbers were 84 (88.4%), 11 (11.6%) and 0 (0%) in control group, respectively. Among CHC group, TNF-a(-308) GG, GA, AA genotypes were detected in 37 (35.6%), 28 (26.9%) and 39 (37.5%) of the patients, respectively, while these numbers were 38 (44.2%), 8 (9.3%) and 40 (46.5%) in control group, respectively. The frequency of GA genotype was significantly higher in both patient groups compared to the control groups (p=0.024 for CHB and p= 0.006 for CHC). When the distribution of allele frequencies of TNF-alpha(-308)G/A polymorphism was evaluated in the patients and control groups, it was noted that G allele was found to be high in CHB patients comparing with controls (94.2% vs 86.8%), however A allele was identified to be lower than controls (5.8% vs 13.2%) (p= 0.008). In contrast, there was no significant difference in terms of allele frequency compared with CHC patients and the control group (p= 0.969). In conclusion, our data in accordance with the results of many studies in literature, determined that TNF-alpha(-308) polymorphisms can influence the chronicity of hepatitis B and C infections. Further studies on this subject would contribute to the elucidation of the molecular mechanisms of chronic hepatitis B and C diseases.
Açıklama
[dc.description]
WOS: 000378184000007
Açıklama
[dc.description]
PubMed: 27175496
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
tur
Konu Başlıkları
[dc.subject]
Chronic hepatitis 8
Konu Başlıkları
[dc.subject]
chronic hepatitis C
Konu Başlıkları
[dc.subject]
TNF-alpha-308
Konu Başlıkları
[dc.subject]
polymorphism
Haklar
[dc.rights]
info:eu-repo/semantics/closedAccess
ISSN
[dc.identifier.issn]
0374-9096
İlk Sayfa Sayısı
[dc.identifier.startpage]
236
Son Sayfa Sayısı
[dc.identifier.endpage]
244
Dergi Adı
[dc.relation.journal]
MIKROBIYOLOJI BULTENI
Dergi Sayısı
[dc.identifier.issue]
2
Dergi Cilt Bilgisi
[dc.identifier.volume]
50
Tek Biçim Adres
[dc.identifier.uri]
https://dx.doi.org/10.5578/mb.20953
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/2830
Görüntülenme Sayısı ( Şehir )
Görüntülenme Sayısı ( Ülke )
Görüntülenme Sayısı ( Zaman Dağılımı )
Görüntülenme
33
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
06 Nisan 2024 20:49
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patients control hepatitis infections respectively groups chronic controls polymorphism female allele studies TNF-alpha(-308) compared detected TNF-a(-308) frequency subject years) TNF-alpha(-308)G/A numbers patient genotypes results polymorphisms investigated diseases between however relationship influence difference elucidation molecular mechanisms
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