A review of the effect of genetic factors on recurrent aphthous in articles published from 2010-2021: A review

Introduction: The main known factors for causing recurrent oral aphthous are genetics and heredity, hematological defects, and immunological disorders. This study was conducted to review the effect of genetic factors on recurrent oral aphthous. Materials and Methods: This study is a literature review that examines the findings derived from existing research articles investigating the influence of genetic factors on the development of recurrent oral aphthous ulcers. The articles on the same topic were selected from available studies on the web, PubMed ISI, Science, Scopus, and Google Scholar, in 10 years from 2013 to 2022. Articles were chosen and assessed based on specific inclusion and exclusion criteria, employing keywords such as genome, oral, recurrent aphthous, and genetic factor as part of the selection process. Findings: 31 studies were selected after screening and based on the inclusion and exclusion criteria. Among them, 1, 2, 3, 2, 5, 5, 6, 3, 3, 1 studies which were done subsequently in the years 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015, 2014, and 2013, were selected. Among them, 9 studies showed no correlation between genetic factors and RAS incidence, and in the 22 remaining studies, a significant correlation was observed between genetic factors and gene expression in RAS patients compared to healthy people. Conclusion: Genetic factors are effective in the occurrence of recurrent oral aphthous in people. Keywords: Recurrent oral aphthous; Genetic factors; Genome.

An In Vitro Comparison of Antimicrobial Effects of Curcumin-Based Photodynamic Therapy and Chlorhexidine, on Aggregatibacter actinomycetemcomitans

Introduction: Considering the importance of prevention in periodontal diseases and the important role of Aggregatibacter actinomycetemcomitans in induction and progression of these diseases, the aim of the present in vitro study was to compare the antimicrobial effects of chlorhexidine digluconate (CHX), curcumin and light-emitting diode (LED) laser, on this bacterium.Methods: Antimicrobial activity of curcumin (5 mg/ml), CHX (2%), LED (120 J/cm2) and LED + curcumin (120 J/cm2 + 2.5 mg/ml) against A. actinomycetemcomitans were tested in vitro, using micro-broth dilution test. One-way analysis of variance (ANOVA) and Tukey’s HSD tests served for statistical analysis.Results: Regarding the minimum inhibitory concentration (MIC), CHX had a significantly lower MIC than curcumin (P < 0.05). Sorted out by bacterial growth from lowest to highest, were CHX, LED + curcumin, curcumin, and LED groups. All the differences were found to be statistically significant (P < 0.05) except for the LED group.Conclusion: We conclude that curcumin is an effective substance in preventing the growth of A. actinomycetemcomitans, whose impact is reinforced when used simultaneously with photodynamic therapy (PDT)

Traditionally used herbal medicines with antibacterial effect on Aggegatibacter actinomycetemcomitans: Boswellia serrata and Nigella sativa

Background: Since bacterial strains developed resistance against commonly used antibiotics and side effects became more serious, other alternatives have been postulated. There is an answer for this issue in ancient medicine. Many plants have been proved to provide antibacterial effect. In this study, Boswellia serrata (BS) and Nigella sativa (NS) were assessed to evaluate the antibacterial effect on Aggregatibacter actinomycetemcomitans (A.a) known as main pathogen of aggressive periodontitis. Materials and Methods: Broth microdilution method was used to obtain minimum inhibitory concentration (MIC) of crude extract of BS and NS. Furthermore, the logarithm of colony forming units grown in fresh brain heart infusion bacterial culture was assessed. Three groups including BS+ (containing only BS), NS+ (containing only NS), and BS-NS− (control group) were defined. For each group, the experiment was repeated 12 times. Results: MIC of BS and NS were 512 μg/mL and 128 μg/mL, respectively. No growth was observed in our negative control group. The mean ± standard deviation of logarithm of CFU/mL for BS, NS, and control group was 4.32 ± 0.36, 3.61 ± 0.3, and 5.57 ± 0.19, respectively. ANOVA test revealed significant difference (P values < 0.0001) of these groups which was later confirmed using the post hoc test of Tukey's honest significant difference (all sP < 0.0001). Conclusions: Both BS and NS are effective against A.a which should be taken into account as appropriate ingredient for oral hygiene products