Inflammatory factors gene polymorphism in recurrent oral ulceration

Huanglian Jiedu Decoction in the Treatment of the Traditional Chinese Medicine Syndrome "Shanghuo"-An Intervention Study

“Shanghuo” (“excessive internal heat”) is caused by exuberant endogenous fire, which does not have a comprehensive and systematic traditional Chinese medicine theory. In previous study, we had evaluated the therapeutic effect of Huanglian Jiedu Decoction (HLJDD) (granule) on patients with “Shanghuo”, however, the specific mechanism was not clear, which need further exploration. To explain its intervention mechanism, we select 57 patients with oral diseases caused by “Shanghuo” and 20 health volunteers to divide into oral disease group, HLJDD intervention group and healthy control group. Firstly, biochemical indicators before and after HLJDD intervention are detected, such as inflammatory factors, oxidative stress factors and energy metabolism factors. The results exhibit that HLJDD significantly decreases indicators succinic acid (p < 0.001); tumor necrosis factor-alpha, adenosine triphosphate, citric acid (p < 0.01); interleukin-8 (IL-8), 4-hydroxynonenal, pyruvic acid, lactate dehydrogenase (p < 0.05). The levels of glucocorticoid, adrenocorticotropic hormone (p < 0.01); lactic acid, IL-4, IL-10 (p < 0.05) significantly increase after HLJDD intervention. In addition, we adopt multi-omics analysis approach to investigate the potential biomarkers. Nontargeted metabolomics demonstrate that the levels of 7 differential metabolites approach that in the healthy control group after HLJDD intervention, which are correlated with histidine metabolism, beta-alanine metabolism and sphingolipid metabolism through metabolic pathway analysis. Targeted lipidomics results and receiver operating characteristic curve analysis show that 13 differential lipids are identified in the three groups mainly focuse on lysophosphatidylcholines, lysophosphatidylethanolamines. Finally, the network associations of those differential biomarkers reveal the regulation of adenosine triphosphate and tricarboxylic acid cycle play essential role in the therapeutic effect mechanism of HLJDD in “Shanghuo”. The study has laid the foundation for further revealing the mechanism and finding clinical biomarkers related to “Shanghuo”.

A family-based genome-wide association study of recurrent aphthous stomatitis

OBJECTIVES

The aetiology of recurrent aphthous stomatitis (RAS) remains unknown. Individuals may share features of genetic susceptibility, and there may also be a hereditary component. The aim was to identify patterns of association and segregation for genetic variants and to identify the genes and signalling pathways that determine the risk of developing RAS, through a family-based genome-wide association study (GWAS).

SUBJECTS AND METHODS

DNA was extracted from buccal swabs of 91 individuals in 16 families and analysed in an Illumina core exome single nucleotide polymorphism (SNP) array. A family-based association test (dFAM) was used to derive SNP association values across all chromosomes.

RESULTS

None of the final 288,452 SNPs reached the genome-wide significant threshold of 5 × 10^-8 . The most significant pathways were the Ras and PI3K-Akt signalling pathways, pathways in cancer, circadian entrainment and the Rap 1 signalling pathway.

CONCLUSIONS

This confirms that RAS is not monogenic but results as a consequence of interactions between multiple host genes and possibly also environmental factors. The present approach provides novel insights into the mechanisms underlying RAS and raises the possibility of identifying individuals at risk of acquiring this condition.

Recurrent aphthous stomatitis and gene variability in selected interleukins: a case-control study

Genetic factors, especially those related to immune system functioning, have been intensively studied to determine their role in the development of recurrent aphthous stomatitis (RAS). The aim of the present study was to analyze gene variability in interleukin (IL)2, IL4 (and its receptor α, IL4Rα), IL10, and IL13, which were selected based on literature review and/or their functional relevance, in Czech patients with RAS and in healthy controls. In total, 252 subjects (178 controls and 74 patients with RAS) were enrolled in this case-control study, and their detailed anamnestic, clinical, and laboratory data were obtained. Nine polymorphisms in the genes encoding interleukins were determined using PCR techniques. There were no significant differences in allele or genotype frequencies of the IL2, IL4, IL4Rα, IL10, and IL13 polymorphisms rs2069762/rs2069763, rs2243250/rs79071878, rs1801275, rs1800896, and rs1800925, respectively, between controls and patients with RAS. The minority alleles rs1800871 and rs1800872, which encode variants of IL10, were associated with a statistically significantly higher risk of RAS, as confirmed by the results of genotype and haplotype analyses. We suggest that variability in the IL10 gene may play an important role in the development of RAS in the Czech population.

Associations of IL-1, 6, and 10 Gene Polymorphisms with Susceptibility to Recurrent Aphthous Stomatitis: Insights from a Meta-Analysis

AIM

To determine if there are significant associations between polymorphisms of the IL-1, IL-6, and IL-10 genes and susceptibility to recurrent aphthous stomatitis (RAS).

METHODS

The PubMed, Embase, and Web of Science databases were searched for all eligible studies using both medical subheadings and free terms through December 2016. A total of 226 citations were retrieved. Odds ratios were used to quantitatively evaluate the associations of IL-1, IL-6, and IL-10 gene polymorphisms with RAS risk. A meta-analysis was performed, and heterogeneity, sensitivity, and subgroup analyses were carried out to clarify and validate the pooled results.

RESULTS

A total of 11 studies were identified that met the inclusion criteria and were included in the meta-analysis. This current systematic review indicated that the IL-1b+3954 C/T polymorphism was significantly associated with an elevated risk of RAS onset for all inheritance models, except for the dominant model. For the IL-10-592 C/A polymorphism, protective associations with RAS were found using both the additive and recessive models, while it increased the risk of RAS in the codominant model. In Asian populations, the IL-10-1082 G/A polymorphism was associated with a protective effect for RAS using the allelic, additive, and recessive models. The IL-6-174 G/C polymorphism was not statistically associated with RAS risk.

CONCLUSION

The IL-1b+3954 C/T polymorphism significantly increases RAS risk. In addition, the IL-10-1082 G/A polymorphism provided protective effects for RAS in the Asian population.

Association of IL-6-174 G/C and IL10-1082 G/A polymorphisms with recurrent aphthous stomatitis risk: A meta-analysis

BACKGROUND

Recurrent aphthous stomatitis (RAS) is a common oral disease with unknown etiology. The association between IL-6-174 G/C and IL10-1082 G/A polymorphisms and the risk of RAS remains controversial. Therefore, we conducted this meta-analysis to gain more evidence-based information.

METHODS

Four online databases, PubMed, Embase, Web of Science, and Cochrane Library, were searched, and the relevant publications were collected. An odds ratio (OR) with a 95% confidence interval (CI) was applied to assess the association of the IL-6-174 G/C and IL10-1082 G/A polymorphisms with RAS susceptibility.

RESULTS

Nine published case-control studies with 779 patients and 1016 controls were collected. The overall analysis proved that the IL10-1082 G/A polymorphism was significantly associated with the risk of RAS in a dominant model (GG + AG vs AA: OR = 1.49, 95% CI = 1.10-2.01, P = .01). A subgroup analysis based on ethnicity revealed significant associations in Asian populations in allelic, heterozygote, and dominant models (G vs A: OR = 1.55, 95% CI = 1.04-2.31, P = .03; AG vs AA: OR = 1.76, 95% CI = 1.16-2.67, P = .01; GG + AG vs AA: OR = 2.04, 95% CI = 1.37-3.03, P = .00). The association in Caucasians and people of mixed ethnicity requires further study. No significant association was detected between the IL-6-174 G/C polymorphism and RAS in any of the genetic models. However, subgroup analysis by ethnicity revealed that the Caucasians were more likely to develop RAS in 4 genetic models (G vs C: OR = 2.36, 95% CI = 1.26-4.41, P = .01; GG vs CC: OR = 7.05, 95% CI = 3.50-14.18, P = .00; GG + CG vs CC: OR = 4.28, 95% CI = 2.17-8.45, P = .00; GG vs CG + CC: OR = 2.59, 95% CI = 1.05-6.41, P = .04). In addition, a significantly decreased risk of RAS susceptibility was found in Asians (CG vs CC: OR = 0.27, 95% CI = 0.07-0.99, P = .049; GG + CG vs CC: OR = 0.27, 95% CI = 0.07-0.98, P = .047).

CONCLUSION

Our meta-analysis indicated that the IL10-1082 G/A polymorphism is associated with RAS susceptibility, especially in Asians. In contrast, the IL-6-174 G/C polymorphism does not have a statistically significant association with RAS susceptibility. However, it may play a different role during the development of RAS in different ethnicities.