ABSTRACT
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the cause of coronavirus disease 2019 (COVID-19), it binds to angiotensin-converting enzyme 2 (ACE2) to enter into human cells. The expression level of ACE2 potentially determine the susceptibility and severity of COVID-19, it is thus of importance to understand the regulatory mechanism of ACE2 expression. Tripartite motif containing 28 (TRIM28) is known to be involved in multiple processes including antiviral restriction, endogenous retrovirus latency and immune response, it is recently reported to be co-expressed with SARS-CoV-2 receptor in type II pneumocytes; however, the roles of TRIM28 in ACE2 expression and SARS-CoV-2 cell entry remain unclear. This study showed that knockdown of TRIM28 induces ACE2 expression and increases pseudotyped SARS-CoV-2 cell entry of A549 cells and primary pulmonary alveolar epithelial cells (PAEpiCs). In a co-culture model of NK cells and lung epithelial cells, our results demonstrated that NK cells inhibit TRIM28 and promote ACE2 expression in lung epithelial cells, which was partially reversed by depletion of interleukin-2 and blocking of granzyme B in the co-culture medium. Furthermore, TRIM28 knockdown enhanced interferon-{gamma} (IFN-{gamma})-induced ACE2 expression through a mechanism involving upregulating IFN-{gamma} receptor 2 (IFNGR2) in both A549 and PAEpiCs. Importantly, the upregulated ACE2 induced by TRIM28 knockdown and co-culture of NK cells was partially reversed by dexamethasone in A549 cells but not PAEpiCs. Our study identified TRIM28 as a novel regulator of ACE2 expression and SARS-CoV-2 cell entry.
ABSTRACT
Objective:To study the effect of pidotimod combined with montelukast sodium in the treatment of patients with asthma, and its influence on the levels of inflammatory factors and immune function.Methods:From February 2019 to February 2020, 102 patients with bronchial asthma admitted to Zhuji People's Hospital were randomly divided into the observation group and the control group, with 51 cases in each group.The control group was treated with montelukast sodium, and the observation group was given pidotimod combined with montelukast sodium.The clinical effect, lung function index, inflammatory factors, T lymphocyte subsets and the incidence of adverse reactions were compared between the two groups.Results:The total effective rate of the observation group was 90.20%(46/51), which was higher than that of the control group [74.51%(38/51)](χ 2=4.317, P=0.038). After treatment, FEV 1, FVC, PEF in the observation group were (82.89±6.94)%, (3.89±0.45)L, (3.49±0.49)L/s, respectively, which were higher than those in the control group [(77.89±6.79)%, (3.58±0.43)L, (3.21±0.45)L/s] ( t=7.370, 5.753, 4.239, all P<0.05). After treatment, the serum levels of procalcitonin (PCT), interleukin-6 (IL-6), C-reactive protein (CRP) in the observation group were (1.45±0.49)μg/L, (9.87±2.65)mg/L, (5.79±1.48)mg/L, respectively, which were lower than those in the control group [(1.79±0.55)μg/L, (12.34±2.97)mg/L, (7.23±1.68)mg/L] ( t=4.624, 6.542, 8.090, all P<0.05). After treatment, the CD 3+ , CD 4+ , CD 4+ /CD 8+ in the observation group were (53.43±5.43)%, (46.34±5.31)%, (1.54±0.23), respectively, which were higher than those in the control group [(48.09±5.17)%, (41.89±5.15)%, (1.26±0.22)], while the CD 8+ in the observation group[(30.65±3.54)%] was lower than that in the control group[(33.72±3.69)%], the differences were statistically significant ( t=3.901, 4.080, 4.072, 5.967, all P<0.05). During the treatment period, the incidences of adverse reactions in the observation group and the control group were 15.69%(8/51) and 9.80%(5/51), respectively, there was no statistically significant difference between the two groups (χ 2=0.793, P=0.373). Conclusion:Pidotimod combined with montelukast sodium has significant therapeutic effect on bronchial asthma.It can improve the pulmonary function, reduce the levels of inflammatory factors, improve the immune function of the body, and has good therapeutic safety.It has a high clinical application value.
ABSTRACT
Objective To study the effect of combining loop electrosurgical excision procedure (LEEP) and recombinant human interferon α2b (rhIFNα-2b) suppository in treatment of cervical intraepithelial neoplasia (CIN).Methods Prospective,random and control study was conducted in 82 patients with CINⅠ-CINⅢ.Before canting out LEEP to these patients,all women were performed HPV DNA detection by the method of Hybri Max.Among these patients,41 patients were assigned to the studying group,in which the patients were given rhIFNα-2b suppository for three courses of treatment after LEEP.The other 41 patients who carried out LEEP simply were assigned to the control group.Liquid-based ThinPrep cytology test (TCT) and HPV DNA were examined in the sixth and twelfth month after treatment.Results In the studying group,the cure rate was 90.2％ when LEEP ended six months,and the cure rate was 100.0％ when LEEP ended twelve months.In the control group,the cure rate was 43.9％ when LEEP ended six months,and the cure rate was 61.0％ when LEEP ended twelve months.In the sixth and twelfth month after LEEP,the difference was significant when we compared the cure rate between the two groups (x2 =19.93,19.89,all P ＜ 0.05).Conclusion The clinical effect of combining LEEP and rhIFNα-2b suppository is better than LEEP in treatment of CIN.The method can remove or destroy the cervical lesions effectively and inhibit HPV replication and spread of HPV infection.
