IL-10 producing B cells regulated 1,3-β-glucan induced Th responses in coordinated with Treg

The association of IL-10-1082G/A gene polymorphism with the risk of acute lung injury/respiratory distress syndrome (ALI/RDS): A meta-analysis

BACKGROUND

Several records have reported that single nucleotide polymorphism (SNP) at the interleukin 10 (IL-10)-1082G/A locus affects the risk of acute lung injury/respiratory distress syndrome (ALI/RDS), but the exact association between them has not been elucidated.

OBJECTIVE

This systematic review aims to elucidate the relationship between SNP at the IL-10-1082G/A locus and susceptibility to ALI/RDS by the method of meta-analysis, to identify the early warning indicators of ALI/RDS.

METHODS

Studies on IL-10-1082G/A SNP associated with ALI/RDS were obtained by thorough retrieval of four English databases from each database construction to April 1, 2022. We processed the data using Stata 15.0 software.

RESULTS

Eight eligible records were entered into this meta-analysis. The pooled analysis demonstrated that SNP at the IL-10-1082G/A locus contributed to the risk of ALI/RDS in the allelic (G vs. A: OR= 0.74, 95%CI: 0.55∼0.98) and recessive gene models (Genotype GG vs. GA+AA: OR= 0.57, 95%CI: 0.35∼0.93). The subgroup analysis based on case type showed that SNP at IL-10-1082G/A locus contributed to the risk of neonatal respiratory distress syndrome (NRDS) under all the gene models (Allele G vs. A: OR= 0.45, 95%CI: 0.29∼0.72; Genotype GG+GA vs. AA: OR= 0.36, 95%CI: 0.22∼0.58; Genotype GG vs. GA+AA: OR= 0.30, 95%CI: 0.09∼0.97; Genotype GA vs. AA: OR= 0.44, 95%CI: 0.27∼0.73), except the homozygous model. However, it was not found that SNP at the IL-10-1082G/A locus contributed to ALI or acute respiratory distress syndrome (ARDS). Moreover, the risk of ALI/RDS in Asia was associated with the IL-10-1082G/A locus in the allelic, recessive, and heterozygous models, while we did not observe this association across the Caucasian populations.

CONCLUSION

SNP at the IL-10-1082G/A locus contributed to the risk of ALI/RDS, allele G and genotype GG increasing the ALI/RDS risk, especially in Asia. Besides, allele G, genotype GG+GA, GG, and GA at the IL-10-1082G/A locus can increase susceptibility to NRDS.

Particulate matter in poultry house on poultry respiratory disease: a systematic review

Particulate matter (PM) is one of the essential environmental stressors for the poultry industry in the world. Given its large specific surface area, PM can adsorb and carry a variety of pollutants, including heavy metal ions, ammonia, and persistent organic pollutants such as pathogenic microorganisms. High concentrations of PM induce poultry respiratory inflammation and trigger various diseases. However, the pathogenic mechanism of PM in poultry houses on respiratory diseases has not been clarified due to its complexity and lack of accurate assays. In terms of pathogenesis, there are 3 ways to explain this phenomenon: Inhaled PM irritates the respiratory tract, decreases immune resistance, and causes a respiratory disease; respiratory tract irritation by compounds presents in PM; infections with pathogenic and non-pathogenic microorganisms attached to PM. The latter 2 modes of influence are more harmful. Specifically, PM can induce the respiratory disease through several toxic mechanisms, including ammonia ingestion and bioaccumulation, lung flora dysbiosis, oxidative stress, and metabolic disorders. Therefore, this review summarizes the characteristics of PM in the poultry house and the impact of poultry PM on respiratory disease and proposes potential pathogenic mechanisms.

Immunomodulatory Effect of Sasa quelpaertensis Leaves Fermentation Products in Mice

The purpose of this study was to enhance the immune-enhancing activity of mushroom strains through fermentation to promote food use of leaf extracts of S. quelpaertensis containing β-glucan. We evaluated the immunomodulatory effect of extracts from fermented S. quelpaertensis leaves (SQGL, SQHE, SQPL). S. quelpaertensis leaves fermentation products were prepared by using mushroom mycelia (Ganoderma lucidum, Hericium erinaceum, Phellinus linteus). The content of β-glucan, a major substance in S. quelpaertensis leaves fermentation products, was 3.73 ± 0.50 mg/mL in the extract (SQ) of S. quelpaertensis leaves. The fermented mushrooms, SQGL, were the highest at 5.57 ± 0.86 mg/100 mL, followed by SQHE and SQPL, and the β-glucan content of all of the glucan was >75.3%. To test the immune activity, S. quelpaertensis leaf fermentation products were administered to mice at different doses (60, 160, and 360 mg/kg) for two weeks. Th cell and macrophage populations were found to increase significantly at all three doses compared to the negative control after two weeks. SQGL and SQHE were highest at 160 mg/kg, and SQPL showed the highest Th cell proliferation at 60 mg/kg. In addition, the production of IFN-γ, IL-4, IL-10, and nitric oxide was significantly higher than that of the negative control after two weeks. In particular, an increase was seen at a low concentration of 60 mg/kg. Therefore, the S. quelpaertensis leaf fermentation product can be very useful as a functional ingredient for enhancing immunity.