scholarly journals FEATURES OF CYTOKINE STATUS IN PATIENTS WITH CHRONIC EBV-INFECTIONS

2018 ◽  
Keyword(s):  
Viral Replication ◽  
Clinical Manifestations ◽  
Important Place ◽  
Group Iii ◽  
Ebv Infection ◽  
Group I ◽  
Tnf Α ◽  
Ifn Γ ◽  
High Degree

Infections caused by EBV are the most common and occupy an important place in the structure of herpes aetiology diseases. The purpose of this work was to study the characteristics of the cytokine status in patients with chronic EBV infection, depending on the level of viral replication. We examined 78 patients with chronic EBV infection, the main clinical manifestations of which were various immunopathological and immunodeficiency states: Group I – with low, Group II – with medium, Group III - with a high degree of viral replication. The Tiff method was used using the Vector-Best reagent kits (Novosibirsk, Russia) to study the cytokine profile in the serum of patients with EBV infection. The determination of alpha and gamma fractions of serum interferon was carried out using the ELISA method by means of the ProCon IF2 plus reagent kit manufactured by Protein Contour LLC (St. Petersburg, Russia). As a result of a study of the cytokine status in patients with chronic EBV infection, it was found that in all three groups there was a significant increase in both pro-inflammatory (IL-1β, IL-6, TNF-α) and antiinflammatory cytokines (IL-10, IL 4, TGFβ1). However, anti-inflammatory cytokinemia was more compensated in group I patients compared with patients in groups II and III. A decrease in IFN-α and IFN-γ was detected in all patients with chronic EBV infection while studying the interferon status. A correlation was found between the level of viral replication and a decrease in the level of IFN-α and IFN-γ. The identified features of the cytokine status in patients with chronic EBV infection can be used to optimize therapy and help develop a differentiated approach to the immunocorrection of these patients, depending on the level of viral replication.

scholarly journals TNF-α -308 G>A and IL10 -1082A>G polymorphisms as potential risk factors for lymphoproliferative disorders in autoimmune rheumatic diseases

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Manal Y. Tayel ◽  
Aida Nazir ◽  
Ibtessam M. Abdelhamid ◽  
Myriam A. S. Helmy ◽  
Nadia E. Zaki ◽  
...  
Keyword(s):  
Risk Factors ◽  
Rheumatic Diseases ◽  
Lymphoproliferative Disorders ◽  
Group Iii ◽  
Autoimmune Rheumatic Diseases ◽  
Group I ◽  
Tnf Α ◽  
Ifn Γ ◽  
Tgf Β1 ◽  
Distribution Frequency

Abstract Background Chronic inflammation with sustained unregulated immune stimulation in autoimmune rheumatic diseases (ARD) may be a risk factor for developing lymphoproliferative disorders (LPD). Markers of ARD activity as high erythrocyte sedimentation rate or erosive joint diseases and the development of B-symptoms were accounted as risk factors for LPD development. We investigated the association of five inflammatory cytokine genes single nucleotide polymorphisms (SNPs): TNF-α -308G>A; TGF-β1 gene codon 10 T>C and 25 G>C; IL-10 promoter SNPs -1082 A>G, -819T>C, and -592A>C; IL-6 -174G>C; and IFN-γ 874 T>A with the risk of LPD development in ARD patients. The study was conducted on 70 patients divided into group I, 25 ARD patients diagnosed as RA (n = 15) and SLE (n = 10) and with no history of malignancy; group II, 25 patients diagnosed with LPD and had no ARD; and group III, 20 patients diagnosed with both diseases: ARD and LPD. Cytokine genotyping was analyzed by PCR-sequence-specific primer (PCR-SSP). Results ARD+LPD patients had significantly higher frequency of TNF-α -308A allele and AA+AG genotype (high TNF-α producers) and IL-10 -1082A allele and AA genotype (low IL-10 producers) than ARD patients (p = 0.003, p = 0.024, p = 0.003, p = 0.03, respectively) with a significantly increased risk of LPD development in ARD patients expressing the corresponding alleles and genotypes. No significant differences were detected in the distribution frequency of either TGF-β1, IL-6, or IFN-γ SNPs between groups I and III or any of the studied SNPs between groups II and III. The distribution frequency of IL-10 ATA haplotype was significantly increased in group III as compared to group I (p = 0.037). Conclusion The significantly increased frequency of the high-TNF-α- and low-IL-10-producing alleles and genotypes in ARD patients may participate in the provision of a proinflammatory milieu that eventually increases the risk of LPD development.

scholarly journals Epstein-Barr Virus BZLF1-Mediated Downregulation of Proinflammatory Factors Is Essential for Optimal Lytic Viral Replication

2015 ◽  
Vol 90 (2) ◽  
pp. 887-903 ◽  
Author(s):  
Yuqing Li ◽  
Xubing Long ◽  
Lu Huang ◽  
Mengtian Yang ◽  
Yan Yuan ◽  
...  
Keyword(s):  
Viral Replication ◽  
Epstein Barr Virus ◽  
Lytic Cycle ◽  
Inflammatory Factors ◽  
Barr Virus ◽  
Ebv Infection ◽  
Tnf Α ◽  
Ifn Γ ◽  
Epstein Barr ◽  
Proinflammatory Factors

ABSTRACTElevated secretion of inflammatory factors is associated with latent Epstein-Barr virus (EBV) infection and the pathology of EBV-associated diseases; however, knowledge of the inflammatory response and its biological significance during the lytic EBV cycle remains elusive. Here, we demonstrate that the immediate early transcriptional activator BZLF1 suppresses the proinflammatory factor tumor necrosis factor alpha (TNF-α) by binding to the promoter of TNF-α and preventing NF-κB activation. A BZLF1Δ207-210 mutant with a deletion of 4 amino acids (aa) in the protein-protein binding domain was not able to inhibit the proinflammatory factors TNF-α and gamma interferon (IFN-γ) and reduced viral DNA replication with complete transcriptional activity during EBV lytic gene expression. TNF-α depletion restored the viral replication mediated by BZLF1Δ207-210. Furthermore, a combination of TNF-α- and IFN-γ-neutralizing antibodies recovered BZLF1Δ207-210-mediated viral replication, indicating that BZLF1 attenuates the antiviral response to aid optimal lytic replication primarily through the inhibition of TNF-α and IFN-γ secretion during the lytic cycle. These results suggest that EBV BZLF1 attenuates the proinflammatory responses to facilitate viral replication.IMPORTANCEThe proinflammatory response is an antiviral and anticancer strategy following the complex inflammatory phenotype. Latent Epstein-Barr virus (EBV) infection strongly correlates with an elevated secretion of inflammatory factors in a variety of severe diseases, while the inflammatory responses during the lytic EBV cycle have not been established. Here, we demonstrate that BZLF1 acts as a transcriptional suppressor of the inflammatory factors TNF-α and IFN-γ and confirm that BZLF1-facilitated escape from the TNF-α and IFN-γ response during the EBV lytic life cycle is required for optimal viral replication. This finding implies that the EBV lytic cycle employs a distinct strategy to evade the antiviral inflammatory response.

scholarly journals Immunomodulatory Activity of Callyspongia sp. Extract Towards Interferon-gamma (IFN-γ) and Tumor Necrosis Factor-Alpha (TNF-α) Levels in Staphylococcus aureus –Induced Wistar Male Rats

2020 ◽  
Vol 11 (2) ◽  
pp. 9311-9317
Keyword(s):  
Staphylococcus Aureus ◽  
Phagocytic Activity ◽  
Group Iv ◽  
Male Rats ◽  
Group Iii ◽  
Group I ◽  
Tnf Α ◽  
Ifn Γ ◽  
Group Ii ◽  
Wistar Male Rats

The IFN-γ and TNF-α are cytokines that involved in the phagocytic activity, and Callypsongia sp. increases phagocytic activity; thus, this study aims to investigate the effect of Callspongia sp. extract toward IFN-γ and TNF-α levels in Staphylococcus aureus-induced Wistar male rats. The animals were divided into four groups (n=5) and treated orally for 7 d as follows: Group I (extract dose of 300 mg/kgBW); Group II (extract dose of 400 mg/kgBW); Group III (Phylantii extract); and Group IV (0.5% NaCMC). On day 8, animals were infected with Staphylococcus aureus intraperitoneally and left for 1h. Blood was collected and assayed with ELISA Kit for IFN-γ and TNF-α. Data collected were then statistically analyzed using SPSS. According to results obtained, the Callyspongia sp. extract effect in both IFN-γ and TNF-α is significantly different from Group IV as the negative control (p<0.05). Callyspongia sp. extract provided similar potency between Group I and Group III (p>0.05), yet Group II provided higher activity in increasing IFN-γ levels. In contrast, Callyspongia sp. provided similar activity between Group I, Group II, and Group III to increase TNF-α levels (p>0.05). Therefore, we concluded that Callyspongia sp. extract increases both INF-γ and TNF-α, responsible for the phagocytic activity.

scholarly journals Concentration of hepatic vitamins A and E in rats exposed to chlorpyrifos and/or enrofloxacin

2016 ◽  
Vol 19 (2) ◽  
pp. 371-378 ◽  
Author(s):  
A. Spodniewska ◽  
D. Barski
Keyword(s):  
Lipid Peroxidation ◽  
Free Radicals ◽  
Gastric Tube ◽  
Initial Period ◽  
Hplc Method ◽  
Antioxidant Vitamin ◽  
Exposure Group ◽  
Group Iii ◽  
Group I

Abstract The aim of the study was to determine the level of antioxidant vitamins A and E in the liver of rats exposed to chlorpyrifos and/or enrofloxacin. Chlorpyrifos (Group I) was administered at a dose of 0.04 LD50 (6 mg/kg b.w.) for 28 days, and enrofloxacin (Group II) at a dose of 5 mg/kg b.w. for 5 consecutive days. The animals of group III were given both of the mentioned above compounds at the same manner as groups I and II, but enrofloxacin was applied to rats for the last 5 days of chlorpyrifos exposure (i.e. on day 24, 25, 26, 27 and 28). Chlorpyrifos and enrofloxacin were administered to rats intragastrically via a gastric tube. The quantitative determination of vitamins was made by the HPLC method. The results of this study indicated a reduction in the hepatic concentrations of vitamins A and E, compared to the control, which sustained for the entire period of the experiment. The four-week administration of chlorpyrifos to rats resulted in a significant decrease of vitamins in the initial period of the experiment, i.e. up to 24 hours after exposure. For vitamin A the maximum drop was observed after 24 hours (19.24%) and for vitamin E after 6 hours (23.19%). Enrofloxacin caused a slight (3-9%) reduction in the level of the analysed vitamins. In the chlorpyrifos-enrofloxacin co-exposure group reduced vitamins A and E levels were also noted, but changes in this group were less pronounced in comparison to the animals intoxicated with chlorpyrifos only. The decrease in the antioxidant vitamin levels, particularly noticeable in the chlorpyrifos- and the chlorpyrifos combined with enrofloxacin-treated groups, may result not only from the increase in the concentration of free radicals, but also from the intensification of the secondary stages of lipid peroxidation.

scholarly journals Differential Expression of CD3, TNF-α, and VEGF Induced by Olanzapine on the Spleen of Adult Male Albino Rats and the Possible Protective Role of Vitamin C

Biomedicines ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 39
Author(s):  
Sahar Youssef ◽  
Marwa Salah
Keyword(s):  
Body Weight ◽  
Vitamin C ◽  
Adult Male ◽  
Control Group ◽  
Albino Rats ◽  
White Pulp ◽  
Group Iii ◽  
Group I ◽  
Tnf Α ◽  
Group Ii

Olanzapine is an antipsychotic drug effective in the treatment of stress-associated psychiatric illnesses, but its effect on the spleen remains unclear. Vitamin C is essential for the optimum function of the immune system. We aim to investigate the effect of Olanzapine on spleen structures and to assess the protective effect of vitamin C. Forty adult male albino rats were divided into four groups: group (I), a control; group (II), rats were given vitamin C at 40 mg/kg body weight; group (III), rats were given Olanzapine at 2 mg/kg body weight; and group (IV), rats were given vitamin C and Olanzapine at the same dose of group (II) and group (III) for one month. The hematoxylin and eosin (H&E) of the olanzapine treated group showed focal areas of cellular depletion and a decrease in the size of the white pulp. The red pulp was expanded and showed marked congestion and dilatation of blood sinusoids. Cluster of differentiation 3 (CD3) was significantly reduced, however both tumor necrosis factor alpha (TNF-α), and vascular endothelial growth factor (VEGF) were significantly higher. The administration of vitamin C repaired structural and immunohistochemical changes via increased CD3 and decreased TNF-α and VEGF. Therefore, the oxidative and the inflammatory pathways may be the possible mechanisms underlying olanzapine immunotoxicity. Vitamin C exerted immune modulator and antioxidant effects against olanzapine.

Cytokine Gene Polymorphisms and Epstein-Barr Virus Infection after Allogeneic Hematopoietic Stem Cell Transplantation

Blood ◽  
2015 ◽  
Vol 126 (23) ◽  
pp. 3125-3125
Author(s):  
Ren Lin ◽  
Zhiping Fan ◽  
Ke Zhao ◽  
Qianli Jiang ◽  
Jing Sun ◽  
...  
Keyword(s):  
Epstein Barr Virus ◽  
Post Transplant ◽  
Barr Virus ◽  
Ebv Infection ◽  
Associated Diseases ◽  
Tnf Α ◽  
Cytokine Gene Polymorphisms ◽  
Ifn Γ ◽  
Epstein Barr ◽  
Tgf Β1

Abstract Backgroud: Epstein-Barr virus (EBV) infection/reactivation and associated diseases remain common complications in recipients of HSCT, leading to severe end-organ diseases and malignance. Single nucleotide polymorphism (SNP) in cytokine genes is considered to be related with EBV-associated post-transplant lymphoproliferative disorders (PTLD) in solid-organ transplantation recipients. In this study, we analyzed the association between cytokine gene polymorphisms and EBV infection/reactivation or diseases in recipients undergoing allo-HSCT. Methods: A total of 233 patients who received allo-HSCT between March 2012 to December 2014 were enrolled in this study. Ten SNPs, including IL-1β -511 rs16944, IL-1RN +11100 rs315952, IL-2 -330 rs2069762, IL-4 -590 rs2243250, IL-10 -592 rs1800872, IL-12 +1188 rs3212227, TNF-α -308 rs1800629, TGF-β1-509 rs1800469, TGF-β1 +869 rs1800470, IFN-γ +874 rs2430561, were tested. The SNPs genotypes in patients with or without EBV infection/reactivation and associated diseases were compared. Besides, the risk factors for EBV infection/reactivation were studied. Results: Seventy-four patients developed EBV infection/reactivation. The patients with EBV infection/reactivation had higher frequencies of donor IL-1β -511 TT genotype, donor IL-4 -590 TT genotype and recipient TNF-α -308 GG genotype than those without (p=0.021, p=0.004, p=0.020, respectively) while the frequencies of donor IL-1β -511 CC genotype, donor IL-1RN +11100 TT genotype, donor IL-2 -330 TT genotype, donor IL-4 -590 CC genotype and recipient TNF-α-308 GA genotype in patients with EBV infection/reactivation were lower than those without (p=0.041, p=0.029, p=0.005, p=0.011, p=0.042, respectively). Multivariate analysis showed donor IL-4 -590TT genotype (p=0.016, HR=1.907, 95% CI =1.130-3.218) and recipient TNF-α -308GG genotype (p=0.002, HR=3.550, 95% CI=1.613-7.812) were risk factors for post-transplant EBV infection/reactivation while donor IL-1RN +11100TT genotype (p=0.001, HR=0.382, 95% CI=0.218-0.670) was protective factors for post-transplant EBV infection/reactivation. Twenty-one patients developed EBV-associated diseases. The patients who developed EBV-associated diseases had higher frequency of donor IFN-γ +874 AT genotype than those did not (p=0.027). On the contrary, the frequencies of donor IL-1β-511 CC genotype, donor IL-10 -592 AA genotype, donor IL-12 +1188 AA genotype and donor IFN-γ +874 AA genotype in patients with EBV-associated diseases were lower than those without (p=0.019, p=0.018, p=0.018, p=0.010, respectively). Conclusion: Several SNPs in cytokine genes might be associated with EBV infection/reactivation and the development of EBV-associated diseases in recipients of allo-HSCT. However, these association should be studied further. Disclosures No relevant conflicts of interest to declare.

scholarly journals Effects of Enoant and Ischemia and Reperfusion on Lens Metabolites of Rats

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Hülya Güngel ◽  
Asiye Nurten ◽  
İhsan Kara ◽  
Serife Evrim Kepekci Tekkeli ◽  
Elif Özkök ◽  
...  
Keyword(s):  
Wistar Rats ◽  
The Other ◽  
Ischemia And Reperfusion ◽  
Polyphenol Content ◽  
Membrane Stabilization ◽  
Group Iii ◽  
Group I ◽  
Ischemia Group ◽  
Dry Diet

The effects of the ischemia and reperfusion on the lens metabolites and the effect of a phytotherapeutic commercial product called “Enoant” (mixed polyphenol content) on the selected lens metabolites were investigated. For this aim, 30 Wistar rats were divided into three groups according to their diet and being subjected to ischemia. 10 of the rats as Group I were fed on dry diet; the other 10 (Group II) were fed on dry diet and drinking water with Enoant. At the end of 15 days period, both groups of rats were subjected to ischemia for 2 hours and reperfused. After another 15 days with their same diet, the rats were decapitated. The remaining 10 rats, which were not subjected to ischemia (Group III), were fed on dry diet only. 1HNMR spectroscopy was used for the determination of lens metabolites of each group of rats. The results obtained from the three groups have been compared statistically. The differences of metabolites were significant except pyruvate and succinate. Oral administration of Enoant revealed effects on increasing membrane stabilization, the antioxidant capacity, osmotic regulator molecule capacity, and sorbitol content of lens disturbed by ischemia. Enoant can be used where oxidative or osmotic stress is formed.

scholarly journals Determination of thiol/disulphide homeostasis as a new indicator of oxidative stress in dairy cows with subclinical endometritis

2021 ◽  
Vol 91 (2) ◽  
pp. 137-148
Author(s):  
Birten Emre ◽  
◽  
Ömer Korkmaz ◽  
Ismail Koyuncu ◽  
Selim Çomaklı ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Dairy Cows ◽  
Immunocytochemical Staining ◽  
Control Group ◽  
Roc Curve Analysis ◽  
Group Iii ◽  
Total Thiol ◽  
Group I ◽  
Subclinical Endometritis

The objective of this study was to determine thiol/disulphide homeostasis (TDH) in infertile cows with subclinical endometritis (SCE). Endometrial cytological samples were collected using a cytobrush to diagnose SCE in 36 infertile cows. According to the results of the cytology examination, those with acute endometritis were classified as Group I (n = 20) and those with chronic endometritis were classified as Group II (n = 16). A control group was formed of heifers as Group III (n = 20). Blood samples were taken from each group on the day of diagnosis (day 0) to analyse TDH. In the cytology examination, both the Giemsa method and immunocytochemical staining were applied to determine chronic inflammation and activity status. In 55.55% (20/36) of the infertile cows with cytological endometritis, the inflammation was determined to be active, and in 44.44% (16/36) it had become chronic. The native thiol and total thiol levels were found to be statistically significantly lower in the acute (206.54 ± 8.30 μmol/L; 227.11 ± 9.30 μmol/L) and chronic SCE cases (225.15 ± 11.89 μmol/L; 247.96 ± 10.80 μmol/L) compared to the heathy control group (308.47 ± 13.59 μmol/L; 336.83 ± 15.5 μmol/L respectively) (P<0.001). Disulphide levels, disulphide/total thiol, native thiol/total thiol and disulphide/native thiol ratios were similar in all the groups (P>0.05). The diagnostic accuracy of native thiol, which can be used in the diagnosis of SCE, was 92.8%, that of total thiol was 89.3% and that of disulphide was 64.3% according to the ROC curve analysis. These results demonstrate that TDH is a reliable and sensitive indicator of oxidative stress in cow SCE, and that abnormal TDH might play a role in SCE pathogenic mechanisms. This is the first study to evaluate thiol/disulphide homeostasis in dairy cows with SCE as a new indicator of oxidative stress.

scholarly journals Immunomodulatory Activity of Xestospongia sp. Ethanolic Extract Towards Interferon-gamma (IFN- γ) and Tumor Necrosis Factor-alpha (TNF-α) Levels in Wistar Male Rats

2020 ◽  
Vol 6 (2) ◽  
Author(s):  
Adryan Fristiohady ◽  
Jumadil ◽  
Wahyuni ◽  
Muh. Hajrul Malaka ◽  
Wa Ode Harnita ◽  
...  
Keyword(s):  
Ethanolic Extract ◽  
Group Iv ◽  
Male Rats ◽  
Immunomodulatory Activity ◽  
Necrosis Factor Alpha ◽  
Group Iii ◽  
Tnf Α ◽  
Factor Alpha ◽  
Ifn Γ ◽  
Necrosis Factor

Xestospongia sp. is one of marine sponge belongs to demosponges class that mainly found in Southeast Sulawesi and the secondary metabolites contained in Xestospongia sp. suspected to have immunomodulatory activity. A previous study exhibited the immunomodulatory of Xestospongia sp. ethanolic extract (XEE) at dose of 300 and 400 mg/Kg BW by affecting the phagocytic activity of macrophages. Thus, this study aims to investigate the effect of XEE towards interferon-gamma (IFN-γ) and tumor necrosis factor-alpha (TNF-α) at dose of 300 and 400 mg/Kg BW. Wistar male rats are divided into 4 groups (n=6) randomly and treated for 7 days orally each as follow: group I (XEE dose of 300 mg/KgBW); group II (XEE dose of 400 mg/KgBW); group III (0.5% NaCMC); and group IV (commercial phylantii extract). On day 8, animals were infected with Staphylococcus aureus and left for 1 hour. Animals were sacrificed and the blood was drawn by cardiac puncture (3 mL), followed by analyzed under ELISA Kit for IFN-γ and TNF-α. Collected data were analyzed statistically using SPSS®. The IFN-γ levels obtained were 350.113; 392.970; 118.416; and 61.958 ρg/mL, respectively and the TNF-α were 2808; 1308; 778; and 845.5 ρg/mL, respectively. According to results obtained, both doses of XEE are affecting the IFN-γ and TNF-α levels (p<0.05) compared to group III as negative control, and group IV as positive control. As conclusion, XEE of both doses is increasing IFN-γ and TNF-α levels of animals that respond to phagocytic activity

scholarly journals Does thyroid dysfunction influence inflammatory mediators in experimental periodontitis?

2021 ◽  
Vol 55 (3) ◽  
pp. 131-141
Author(s):  
Vitaliy Shcherba ◽  
Inna Krynytska ◽  
Mariya Marushchak ◽  
Mykhaylo Korda
Keyword(s):  
Inflammatory Cytokines ◽  
Inflammatory Mediators ◽  
Thyroid Dysfunction ◽  
Solid Phase ◽  
White Male ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Group Iii ◽  
Group I ◽  
Tnf Α

Abstract Objective. The aim of the present study was to investigate the presence of inflammatory mediators in rats with only periodontitis and periodontitis in a setting of hyper- and hypo-thyroidism and to analyze the correlative linkages between inflammatory mediators and thyroid hormones. Methods. White male 12–14 weeks old inbred rats (n=48) weighing 180–200 g were employed in the experiment. They were randomly divided into the following groups: Group I – control group, Group II – group with a model of periodontitis, Group III – group with a periodontitis in a setting of hyperthyroidism, and Group IV – group with periodontitis in a setting of hypothyroidism. The presence of tumor-necrosis factor-α (TNF-α) and interleukins IL-1β and IL-10 in the periodontal homogenate supernatant was studied by a solid-phase enzyme-linked immunosorbent assay. Results. It was shown that experimental lipopolysaccharide (LPS)-induced periodontitis is accompanied by hyperproduction of pro-inflammatory cytokines (TNF-α, IL-1β) and reduction of anti-inflammatory cytokines (IL-10), whereas TNF-α underwent to maximum changes. Thyroid dysfunction exacerbates cytokine imbalance and severity of inflammation in experimental LPS-induced periodontitis, especially pronounced at hyperthyroidism, as evidenced by the predominance of TNF-α and IL-1β levels in the periodontal homogenate supernatant by 38.5% (р<0.01) and 75.6% (p<0.001), respectively, hyperthyroid over the euthyroid, and by 20.1% (p<0.05) and 24.1% (p<0.05), respectively, over the hypothyroid rats. Conclusions. Thyroid dysfunction, especially hyperthyroidism, may play an important role in the pro-inflammatory response in periodontitis. Hyperproduction of inflammatory mediators in thyroid dysfunction can induce a noticeable damage in the whole apparatus of the periodontium, thereby causing progression of periodontitis.

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