Vamsi Lavu; Vettriselvi Venkatesan; Priyanka Venugopal; Bhaskar Venkata Kameswara Subrahmanya Lakkakula; Solomon Franklin Durairaj Paul; Kumarasamy Peria; Suresh Ranga Rao
Volume 14, Issue 1 , March 2017, , Pages 51-58
Abstract
Background: Cytokines are suggested to play a role in periodontitis. Objective: To determine and compare the levels of Interleukin-1 beta (IL-1β) and Tumor necrosis factor alpha (TNF-α) in gingival crevicular fluid (GCF) samples amongst healthy individuals and those with chronic periodontitis. ...
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Background: Cytokines are suggested to play a role in periodontitis. Objective: To determine and compare the levels of Interleukin-1 beta (IL-1β) and Tumor necrosis factor alpha (TNF-α) in gingival crevicular fluid (GCF) samples amongst healthy individuals and those with chronic periodontitis. Further to compare the GCF cytokine levels in three genotype classes defined by the respective gene polymorphisms. Methods: The study was conducted on 41 chronic periodontitis patients and 40 healthy volunteers. IL-1β and TNF-α were quantified in GCF by cytometric bead array. DNA was extracted from peripheral blood samples and genotyping of IL1B +3954C/T (rs1143634) IL1B -511G/A (rs16944), TNFA -1031T/C (rs1799964) and TNFA -863C/A (rs1800630) polymorphisms were performed using Sanger sequencing and Taqman SNP genotyping assays methods. Results: Both IL-1β and TNF-α levels were significantly higher in chronic periodontitis group compared to the controls. IL-1β and TNF-α levels did not significantly differ in genotype classes of the respective polymorphism (IL1B -511G/A, TNFA -1031T/C and TNFA -863C/A). However, individuals with CT genotype of IL1B +3954C/T showed higher levels of IL-1β in the gingival crevicular fluid (ANOVA p<0.05). Conclusion: The results of this study revealed the presence of higher levels of IL-1β and TNF-α in subjects with periodontitis and genetic control of IL-1β levels in our samples of Indians.
Ali Akbar Amirzargar; Nilufar Mohseni; Mohammad Ali Shokrgozar; Zohreh Arjang; Nahid Ahmadi; Manijeh Yousefi Behzadi; Amir Amanzadeh; Fazel Shokri
Abstract
Background: Different studies have demonstrated that a small proportion of healthy individuals receiving the hepatitis B (HB) vaccine do not produce protective levels of anti-HB antibody, a phenomenon which could be linked to certain human leukocyte an-tigen (HLA) class-II alleles or haplotypes. Objectives: ...
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Background: Different studies have demonstrated that a small proportion of healthy individuals receiving the hepatitis B (HB) vaccine do not produce protective levels of anti-HB antibody, a phenomenon which could be linked to certain human leukocyte an-tigen (HLA) class-II alleles or haplotypes. Objectives: The present study was under-taken to determine the frequency of HLA class-II alleles in Iranian healthy adult re-sponders and non-responders to HB vaccine. Methods: Twelve non-responders (anti-HBs antibody<10 IU/L) and 46 responders (anti-HBs antibody>100 IU/L) were tissue typed for HLA class-II. HLA-DRB1, DQB1 and DQA1 alleles were determined using polymerase chain reaction based on sequence specific primers (PCR-SSP) technique. Accessibility to excess amount of genomic DNA was possible using Epstein-Barr virus (EBV)-transformed B-cells established from all vaccinees. Results: Our results demon-strated increased frequencies of HLA- DRB1*07, DRB1*03, DRB1*04, DQB1*0201, DQA1*0201 alleles and HLA- DRB1*07/DQB1*0201/DQA1*0201 and DRB1*04/DQB1*0302/DQA1*03011 haplotypes in the non-responder group. Com-parison between responders and non-responders revealed only a significant difference for DQB1*0201 allele (p<0.05). Conclusion: These findings confirm the association of certain HLA alleles and haplotypes with the lack of antibody response to HB vaccine in an Iranian population.
