Oral administration of artemisinin nanospheres alleviates inflammation in mice with spontaneous ulcerative colitis / 细胞与分子免疫学杂志

Objective To investigate the anti-inflammatory effect of artemisinin (ART) encapsulated by β-lactoglobulin (BLG) nanoparticles on Winnie spontaneous ulcerative colitis mouse model. Methods BLG-ART nanoparticles were prepared and their effects on the solubility and stability of ART were evaluated. A mouse model of colitis induced by dextran sulfate sodium (DSS) was used to compare the therapeutic effects of artemisinin (ART) administered by direct gavage and artemisinin encapsulated by β-lactoglobulin nanoparticles (BLG-ART) administered by gavage. Winnie mice were randomly divided into blank group, ART group and BLG-ART group. Mice in the ART group were given 50 mg/kg ART by gavage; mice in the BLG-ART group were given the same dose of BLG-ART nanoparticle PBS dispersion by gavage; mice in the blank group were given the same amount of PBS by gavage, for 16 days. The body mass and disease activity index (DAI) of each group of mice were measured. HE staining was used to observe the pathological changes of mouse intestinal tissue, and real-time quantitative PCR was used to detect the mRNA expression levels of TNF-α, interleukin 1β (IL-1β), IL-10 and IL-17 in mouse colon tissue. Results Compared with the ART group and the blank group, the body mass of the BLG-ART group increased and the DAI decreased after 16-day treatment; the crypt structure of the proximal and distal colon regions of the mice recovered; goblet cell loss decreased; neutrophil infiltration decreased and the mRNA expression levels of pro-inflammatory and anti-inflammatory cytokines were significantly down-regulated. Conclusion ART-BLG can alleviate intestinal inflammation in spontaneous ulcerative colitis mice.

Helicobacter pylori infection and its correlation with pepsinogen in the elderly aged 60 - 80 years in Jianye District, Nanjing / 公共卫生与预防医学

Objective To analyze the infection situation of Helicobacter pylori (Hp) and its correlation with pepsinogen (PG) in the 60~80 year old population in Jianye District, Nanjing City. Methods From December 2018 to December 2020, 758 elderly people aged 60 to 80 in the community in Jianye District Nanjing City. were selected. All subjects were tested for Hp by 13C-UBT method, and clinical signs of Hp positive people aged 60 to 80 years were analyzed. Including gender, age, alcohol consumption, family history of stomach cancer, chronic gastritis, and spicy eating habits; Hp positive group was given amoxicillin capsule 1.0g/ time, twice a day, esomeprazole magnesium enteric-coated tablet 20mg/ time, twice a day, clarithromycin tablet 0.5g/ time, twice a day for 8 weeks, and Hp was detected again after the end of treatment. All levels of PGI, PGII and PGI/PGII were determined by ELISA. The serum PG level of the experimental group and the control group and the serum PG level of the Hp positive population before and after Hp eradication were compared, and the correlation between Hp infection and PG level in the elderly population was analyzed by Pearson correlation. Results A total of 161 cases (21.24%) of 758 patients with chronic gastritis had Hp infection. The proportion of Hp infection in males was significantly higher than that in females (χ2=4.128，P2=6.771, P2 =8.305，P2=6.169，P2=5.576 , P2=7.936, P<0.05). The levels of PGI and PGI/PGII in the experimental group were significantly higher than those in the control group (P<0.05). The level of PGII in experimental group was significantly lower than that in control group (P<0.05). After treatment, 76 hP-positive patients turned negative, and PGI and PGI/PGII levels after Hp eradication were significantly lower than those before Hp eradication (P<0.05). PGII after Hp eradication was significantly higher than before (P<0.05). According to Pearson correlation analysis, Hp infection in elderly population was positively correlated with PGI and PGI/PGII levels, with correlation coefficients (r1=0.408,r2=0.412,P<0.05), and negatively correlated with PGII, with correlation coefficients (r=-0.469, P<0.05). Conclusions The Hp infection rate in patients with chronic gastritis is high, mainly in elderly men in Jianye District, Nanjing City.The levels of PGI and PGII in HP-positive patients are high, and the levels of PGI/PGII are low. The serum PG level can be used to evaluate the diagnosis and treatment effect of patients with Hp infection.