Objective To investigate the long non-coding RNA(lncRNA) MRAK08838 regulates macrophage function to influence the development of asthmatic airway inflammation. Methods MRAK088388 gene knockout (MRAK088388^-/-) mouse model was prepared and allergic asthma was induced by dust mite protein Dermatophagoides farinae 1 (Der f1). The mice were sacrificed after 28 days of modeling, and serum was collected to measure IgE and IgG. The FinePointe RC system was used to measure airway hyperresponsiveness and evaluate lung function in mice. Lung tissue was taken for HE staining, and periodic acid-Schiff (PAS) staining was used to evaluate inflammatory infiltration and mucus secretion in mouse lungs. Fluorescence quantitative PCR was used to detect the expression level of lncRNA MRAK08838 in bronchoalveolar lavage fluid (BALF) cells and lung tissue of asthmatic mice. ELISA was used to detect the levels of inflammatory cytokines IFN-γ, IL-4, IL-5, IL-13, IL-10 and IL-17A. Flow cytometry was used to evaluate the phenotype of macrophages in BALF and lung tissue, as well as the proportion of neutrophils, eosinophils, and alveolar macrophages. The changes of the above indicators were detected in mice by adoptive transfer of bone marrow-derived macrophages (BMDM). Results Under the challengle of Der f1, MRAK088388^-/- mice showed reduced allergic airway inflammation, including reduced eosinophils in BALF and reduced production of IgE and IgG1. In addition, Der f1-treated MRAK088388^-/- mice had fewer M2 macrophages than wild-type asthmatic mice. Wild-type mouse BMDM (M0) and Der f1-treated MRAK088388^-/- mice also showed mild inflammatory response. Conclusion Knockout of MRAK088388 alleviates airway inflammation in asthmatic mice by inhibiting M2 polarization of airway macrophages.
Animals ; Mice ; Mice, Knockout ; RNA, Long Noncoding/genetics* ; Asthma/genetics* ; Macrophages ; Immunoglobulin E

【Objective】 To investigate the association between the long-stranded non-coding ribonucleic acid (lncRNA) MRAK088388 and allergic asthma in children. 【Methods】 A total of 15 healthy children and 15 children with asthma were monitored for disease progression over a 2-year period. Blood samples were collected from patients during the chronic phase of the disease for lncRNA/mRNA expression microarray analysis. Competing endogenous RNA networks (MRAK088388/miR-30a/ATG5) were identified by bioinformatics analysis. In vitro cultured bronchial epithelial (16HBE) cells were used to quantify gene and associated protein expression levels by real-time fluorescent quantitative polymerase chain reaction (qPCR) and protein blotting, respectively. Cell Counting Kit-8 and transwell assays were used to assess the proliferation and migration of 16HBE cells and verify the effects of MRAK088388, miR-30a and ATG5 on asthma. 【Results】 Six lncRNA-miRNA-mRNAs were identified by correlation analysis. By qRT-PCR analysis, MRAK088388/miR-30a/ATG5 was selected to construct the ceRNA network in this study. mRAK088388 and ATG5 expressions were high in the peripheral blood of children with asthma, while the expression of miR-30a was low (P<0.05). The expression level of E-cadherin was significantly higher in 16HBE cells after si-MRAK088388+TGF-β1 group, while the expression levels of Vimentin and α-SMA were significantly lower (P<0.05), indicating that knockdown of MRAK088388 inhibited the epithelial mesenchymal transition in 16HBE cells. Compared with si-NC+ TGF-β1 group, the cell morphology of si-MRAK088388+TGF-β1 group was similar to that of the control group, indicating that MRAK088388 knockdown attenuated TGF-β1-induced cell morphological changes; in addition, MRAK088388 knockdown inhibited TGF-β1-induced proliferation and migration of 16HBE cells. MRAK088388 was confirmed by qPCR and protein blotting to promote the progression of childhood asthma by targeting the miR-30a/ATG5 axis. 【Conclusion】 Childhood asthma is associated with the MRAK088388/miR-30a/ATG5 axis, and MRAK088388 is involved in the process of childhood allergic asthma by negatively regulating miR-30a expression and regulating elevated ATG5 expression levels to affect bronchial epithelial cell mesenchymal transition, proliferation, and migration.

Presynaptic dopaminergic PET imaging is a useful method for the diagnosis of parkinsonism. Based on the expert consensus on operation and clinical application of dopamine transporter brain PET imaging technology published in 2020, this paper further recommends the relevant elements of result interpretation of presynaptic dopaminergic PET imaging.

Objective:To assess the trend and the factors responsible for the increase of life expectancy of residents in Tianjin over the past two decades.Methods:Abridged Life Table and Arriaga's decomposition method was applied to quantify the influence of the age structure and the leading causes of death on the increase of life expectancy of residents in Tianjin from 1999 to 2018.Results:In the past 20 years, the life expectancy of residents in Tianjin increased by 4.97 years, the life expectancy of men and women increased by 4.11 years and 5.86 years, respectively. The decrease of mortality rate in 0-year-old group contributed 19.17% to the increase of the life expectancy, while the decrease of mortality rate in residents aged ≥55 years contributed more to the increase of life expectancy, with the cumulative contribution rate of 67.38%. The major contribution to the increase of life expectancy was the mortality reduction of cerebrovascular disease, respiratory disease, cardiovascular disease, perinatal diseases, congenital malformations and injury, with the contribution percentage of 27.27%, 21.37%, 15.76%, 12.22%, 6.44% and 4.86%, respectively. The increase of mortality of malignant tumor, injury and poisoning, diabetes and nervous system diseases and others had a negative effect on the increase of life expectancy of people aged ≥75 years. From 1999 to 2018, the life expectancy increased from 76.72 years to 81.46 years ( t=9.11, P<0.001), the annual percent change (APC) was 0.58%. From 2011 to 2018, it was stable, ranging from 81.46 years to 81.69 years ( t=0.89, P=0.387, APC=0.13%). Conclusion:From 1999 to 2018, the increase of life expectancy was attributed to the decrease of mortalities in infants and the elderly and the decrease of mortalities of cerebro-cardiovascular disease, respiratory disease, perinatal disease, congenital malformations and injury. However, these positive contributions were partly offset by the negative contribution of malignant tumor, injury, diabetes and nervous system disease in those aged ≥75 years. Comprehensive prevention and control of key diseases should be strengthened in key population in order to further improve the life expectancy of the population.

Objective To explore the diagnostic value of ESWAN in uterine fibroids by analyzing the ESWAN signal of uterine fibroid. Methods Conventional MRI and ESWAN were carried out in thirty-seven patients with uterine fibroids.The differences of ESWAN indexes between uterine fibroids and myometrium were analyzed by paired t-test.The value of ESWAN on diagnosing uterine fibroids was analyzed by receiver operating characteristic curve(ROC curve).Results The magnitude value,phase value,R2* value and T2*value of uterine fibroids were 1 661.69 ± 45.24,(0.006 7 ± 0.007 7)Hz,(26.69 ± 1.04)Hz and(34.68 ± 1.73)ms,respectively.The magnitude value,phase value,R2* value and T2* value of myometrium were 1 790.95 ± 49.04,(0.013 1 ± 0.011 8)Hz,(22.35 ± 0.84)Hz and(42.53 ± 2.16)ms.The magnitude value,phase value and T2* value of uterine fibroids were lower than those of myometrium (P=0.008,P=0.659 and P=0.002).While the R2* value of of uterine fibroids was higher than that of myometrium(P=0.001). The area under curve(AUC)of magnitude value,phase value,R2* value and T2* value were 0.604,0.553,0.666 and 0.662.Conclusion ESWAN can show the differences between uterine fibroids and myometrium ，while the ability to independently diagnose uterine fibroids was modest.

Animals ; Cognitive Dysfunction ; metabolism ; Cystatin C ; pharmacology ; Hippocampus ; drug effects ; Insulin Resistance ; physiology ; Neurons ; drug effects ; Rats ; Rodentia

Objective To explore the value of enhanced T2 star weighted angiography(ESWAN)in the treatment of uterine fibroids with high intensity focus ultrasound(HIFU) by analyzing the changes of ESWAN. Methods Uterine fibroids were detected through pelvic conventional MRI and ESWAN 1 day before and after HIFU operation. Different indexes of ESWAN were measured ,and differences were compared with the paired t-test. Results The preoperative and postoperative values of magnitude were 1624.59 ± 53.07 and 1750.13 ± 39.81, phase values were 0.0012 ± 0.0081 Hz and 0.0025 ± 0.1063 Hz,R2*value were 27.69 ± 1.27 Hz and 24.19 ± 1.20 Hz,and T2*values were 34.66 ± 2.07 ms and 36.46 ± 2.14 ms. After HIFU operation,magnitude value,phase value and T2*value were higher(P=0.04,P=0.91 and P=0.45),and R2*value was lower(P=0.019). Conclusions ESWAN can provide more information about histopathologic changes of uterine fibroids after HIFU.

Objective To study the clinical value of DTI in the evaluation of high intensity focused ultra-sound (HIFU) for treating uterine fibroids by analyzing the characteristics of DTI before and after surgery. Methods DTI was performed before and after HIFU. The study included 25 patients with 30 uterine fibroids. All data were processed using GE AW4.5 Workstation. ADC,FA,VRA and T2-weighted trace of uterine fibroids before and after HIFU were recorded and analyzed. Results After HIFU,no enhancement was observed in uterine fibroids on DCE-MRI. The signal of uterine fibroids on FA,VRA map was lower after HIFU. No statistical differences were found between ADC and T2-weighted trace before and after the surgery(P>0.05). FA and VRA of uterine fibroids after HIFU were lower than those before the surgery(P<0.05). Conclusion FA and VRA can reflect micro differ-ence of uterine fibroids before and after HIFU ,which is useful for assessing the curative effect after HIFU.

BACKGROUND:Breast cancer stem cells not only lead to theoccurrence of breast cancer, but also may cause breast cancer metastasis and recurrence. The relationship between stem cells and cell resistance is also gaining increasing attentions, and the focus on the stem cell treatment may result in unexpected results.OBJECTIVE:To explore the reversal effect of psoralen on glutathione-S-transferase π (GST-π) in human breast cancer MCF-7/ADR cells and its mechanism.METHODS:MCF-7/ADR cells were cultured and enriched in serum-free medium to obtain breast cancer stem cells.RT-PCR and western blot were used to detect the expression of GST-π at the levels of gene and protein in the MCF-7/ADR cells after treatment with 0, 4, 8, 12, 16 mg/L psoralen. To observe the activation of nuclear factor-κB,western blot was used. The expression of GST-π was detected by RT-PCR in 18 μmol/L SN50 group and 8 mg/L psoralen group. Cell counting kit-8 assay was used to detect the effect of doxorubicin on cell proliferation.RESULTS AND CONCLUSION:Compared with the control group, psoralen reduced the expression of GST-π at the mRNA and protein levels, and significantly inhibited the activation of nuclear factor-κB. It was suggested that psoralen could reverse the multidrug resistance of human breast cancer MCF-7/ADR stem cells by decreasing the expression level of GST-π. The mechanism may be achieved by inhibiting the nuclear factor-κB signal pathway.

Objective To investigates the feasibility of diffusion tensor imaging (DTI) and diffusion tensor tracking (DTT) for evaluation of the effect of childbearing history on female pelvic floor muscles. Methods Forty-six healthy females were divided into two groups: nulliparous and primiparous. MR conventional sequences and DTI were acquired. The optimized FA threshold value was obtained by regulating the FA to fiber tracking. The two groups were compared in terms of ADC, FA, VRA and T2-WT. Results (1)The DTT of FA 0.18 got the highest score in fiber tracking . ( 2 ) The ADC of nulliparous subjects and the subjects who had given birth were (1.24 ± 0.11) ×10-3 mm2/s, (1.33 ± 0.11) ×10-3 mm2/s (P = 0.017). There were no statistical differences in FA, VRA and T2-WT between the two groups (P > 0.05). Conclusions The optimized FA threshold of fiber tracking in pelvic floor muscles is 0.18. DTI and DTT may be used to evaluate the effect of childbearing history on female pelvic floor muscles.