Objective:To investigate the effects of methyltransferases like 3(METTL3)mediated m6A modification of double homology cassette A pseudogene8(DUXAP8)on the proliferation,migration and invasion of salivary adenoid cystic carcinoma SACC-LM cells and its potential molecular mechanisms.Methods:Whole-transcriptome sequencing showed that DUXAP8 was highly ex-pressed in SACC than in para-cancerous tissues(P＜0.05).The m6A modification sites on DUXAP8 were predicted using the SRAMP website,and the mRNA and protein expression of m6A-modified genes and the genes associated with the epithelial-mesen-chymal transition(EMT)was measured by qRT-PCR and Western blot,respectively.METTL3 and DUXAP8 was knocked down or overexpressed in SACC-LM cells,and the proliferation,migration,and invasion of the cells were assessed by CCK-8,scratch and Transwell assays.The correlation between METTL3 and DUXAP8 was evaluated using MeRIP-qPCR.Results:The expression of DUXAP8 in SACC tumor was higher than that in para-cancerous tissues(P＜0.05).Knockdown of DUXAP8 reduced proliferation,migration and invasion of SACC-LM cells,as well as the expression of EMT-related genes(P＜0.05).Multiple m6A modification sites of high confidence were found on DUXAP8.METTL3 was highly expressed in tumor tissues,more than other related genes(P＜0.05)and enzyme-encoding genes in SACC-LM cells(P＜0.05).METTL3 was found to function as a methyltransferase to regulate the expression of DUX-AP8,and downregulation of METTL3 inhibited prolifera-tion,migration and invasion of SACC-LM cells and partially reversed the promotion of these activities induced by DUX-AP8 overexpression(P＜0.05).Conclusion:METTL3-me-diated m6A modification upregulated DUXAP8 expression,which promotes the proliferation,migration and invasion of SACC cells.

Objective:To investigate the current situation of expected sadness of family caregivers of first stroke patients and analyze its influencing factors, so as to provide reference for the formulation of psychological decompression intervention program for family caregivers of stroke patients.Methods:Convenience sampling method was used to conduct cross-sectional survey of 212 family caregivers of first stroke patients who were hospitalized in the First Affiliated Hospital of Shandong First Medical University from March 2020 to May 2021, using general information questionnaires and Anticipatory Grief Scale and Connor-Davidson Resilience Scale to investigate and anlalyzed its influencing factors.Results:The scare of anticipatory grief of the caregivers of first stroke patients was 87.93 ± 17.36. The results of multiple stepwise regression analysis showed that the age of family caregivers, psychological elasticity, the degree of relationship with patients, patients′ cognitive ability and self-care ability were the influencing factors of anticipatory grief of family caregivers of first stroke patients ( t values were -6.73 -11.77, P <0.05). Conclusions:The caregivers of first stroke patients have serious anticipatory grief. Staff should pay attention to the psychological conditions of the family caregivers and take effective measures to promote their physical and mental health.

Objective:To evaluate the efficacy of disposable disinfection cap in preventing catheter-related blood stream infections (CRBSIs).Methods:Literature on the prevention of CRBSIs by disposable disinfection caps were retrieved from CNKI, Wanfang Database, VIP database, Chinese Biomedical Literature Database, PubMed, Cochrane Library, Embase and Web of Science databases. The retrieval period was from the database construction to June 30, 2022. After literature screening, data extraction and quality evaluation were independently carried out by 2 researchers, RevMan5.4 software was used for analysis.Results:A total of 12 articles were included, including 9 832 patients. Meta-analysis results showed that compared with conventional manual disinfection, disposable disinfection cap could reduce the incidence of CRBSIs, and the difference was statistically significant ( RR = 0.58, 95% CI 0.43-0.79, P<0.01). Disposable disinfection cap could reduce the incidence of CRBSIs in adults, but there was no significant difference in the incidence of CRBSIs in children ( P>0.05). It could reduce the incidence of CRBSIs in patients with indwelling vascular catheters in ICU ( RR = 0.58, 95% CI 0.38-0.89, P<0.05), but there was no statistical difference in the incidence of CRBSIs in patients without indwelling vascular catheters in ICU ( P>0.05). In addition, the compliance of the use of disinfection caps by nursing staff was improved by 80% - 90% and the treatment cost was saved by about 282 - 464 dollars. Conclusions:Disposable disinfection caps can reduce the occurrence of CRBSIs, improve the disinfection compliance of nursing staff, and save the hospitalization cost of patients. It is suggested to be popularized in clinical practice.