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Objective:To investigate the effects of mixed probiotics on food allergy and the underlying mechanism.Methods:BALB/c mice on the 15 th day of pregnancy were randomly (random number table method) classified into the control group, food allergy model group and mixed probiotics group.Mice in the food allergy model and mixed pro-biotics group were subjected to ovalbumin (OVA) sensitization after birth, and those in the mixed probiotics group were then given probiotic solution by gavage from day 21 to day 35.Mice in control group were similarly given 9 g/L saline.Twenty-four hours after the last OVA sensitization, intestinal histopathological sections were prepared to observe intestinal pathological changes.Blood smears were prepared to detect eosinophil count.In addition, serum samples were collected to measure cytokine levels and OVA specific antibodies.The number of dendritic cells (DCs) and regulatory T cells (Tregs) in mouse mesenteric lymph nodes was calculated.Differences among 3 groups were compared by the One- Way ANOVA or Kruskal- Wallis H test. Results:Compared with those of food allergy model group, diarrhea score, the ratio of eosinophils and serum levels of interleukin(IL)-4, IL-5, IL-13, mast cell protease 1 (MCPT-1), and OVA specific antibodies IgE and IgG were significantly lower in mixed probiotics group[(2.00±0.71) points vs.(3.22±0.97) points, (2.28±1.61)% vs.(10.99±2.26)%, (413.68±22.81) ng/L vs.(708.78±27.66) ng/L, (36.64±3.74) ng/L vs.(46.05±4.95) ng/L, (201.37±65.61) ng/L vs.(495.22±96.66) ng/L, (31 924.15±1 177.77) ng/L vs.(36 175.77±618.29) ng/L, (9.10±8.08) ng/L vs.(19.69±0.84) ng/L, (30.50±8.81) ng/L vs.(190.32±6.40) ng/L], while IL-10 level was significantly higher[(164.12±3.88) ng/L vs.(123.90±7.31) ng/L] ( t=3.37, 8.72, 16.07, 3.90, 7.40, 7.95, 3.91, 44.00 and 7.76, respectively, all P<0.01). Compared with those of food allergy model group, programmed cell death ligand 1 (PD-L1) level on the surface of CD 103+ DCs and CD 103+ CD 80-CD 40-DCs, the proportion of Tregs in CD4 + T cells, and the level of programmed cell death 1 (PD-1) on the surface of Tregs were significantly higher in mixed probiotics group[(75.59±0.45)% vs.(45.60±4.73)%, (67.56±1.87)% vs.(37.12±6.07)%, (8.24±0.69)% vs.(6.20±0.66)%, (11.25±3.12)% vs.(4.08±2.33)%]( t=7.88, 4.48, 3.63 and 3.71, all P<0.01). Conclusions:Mixed probiotics can alleviate the symptoms of food allergy and inflammatory response of young rats through mediating Tregs via the PD-1/PD-L1 pathway.
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Objective To explore the efficacy and safety of the bronchoscopic high frequency electrocoagulation combined with balloon dilatation in treating tuberculosis inflammatory airway constriction. Methods According to the different methods of treatment, 55 patients with tuberculosis airway constriction were randomly divided into two groups, the balloon dilatation group (26 cases) and combination group (29 cases). The patients in balloon dilatation group underwent bronchoscopic balloon dilatation and the patients in combination group underwent bronchoscopic balloon dilatation combined with high frequency electrocoagulation. The patients of the two groups accepted endoscopic therapy once a week. Effective rate of recanalization for the narrow airway, frequency of effective treatment and the time of tuberculosis bacterium vanishing was recorded. Intraoperative and postoperative complications were also observed. Three months after the treatment, all patients accepted bronchoscopic to observe and assess the airway restenosis rate. Results After treatment, the effective rate in balloon dilatation group and combination group had no significant difference[69.2%(18/26) vs. 89.7% (26/29 )](P＞ 0.05 ),but frequency of effective treatment and time of tuberculosis bacterium vanishing had significant difference[(3.5 ±1.3) times vs. (1.5 ± 1.1) times, (23.3 ±3.6) d vs.(13.2 ±2.3) d](P<0.01). There was no significant difference on the intraoperative and postoperative complications between two groups (P＞0.05). The airway restenosis rate was 33.3%(6/18) in balloon dilatation group and 7.7%(2/26) in combination group after treatment for 3 months (P ＜0.05). Conclusions Combination of bronchoscopic balloon dilatation and high frequency electrocoagulation is an efficacy and safety way for the tuberculosis inflammatory airway stenosis. It can reduce the frequency of interventional therapy, shorten the time of tuberculosis bacterium vanishing, and may also decrease the airway restenosis rate.
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0.05). In HiLo group, the levels of MDA and SOD did not changed signific antly(P