OBJECTIVE To prepare an intelligent responsive liposome-hydrogel nanopreparation co-loaded with gambogic acid （GA）， and characterize its antitumor activity in vitro . METHODS GA-ICG-Lip-gel was prepared by ethanol injection and cold dissolution， incorporating GA and the photosensitizer indocyanine green （ICG）. The appearance and microscopic morphology of GA-ICG-Lip-gel were observed， its encapsulation efficiency and drug loading capacity were measured， and its photothermal conversion performance， photothermal stability， and infrared imaging properties were investigated， along with the determination of its in vitro release profile. Human breast cancer MCF-7 cells were used as objects to investigate the effects of GA-ICG-Lip-gel （or with near-infrared light irradiation） on cell viability， migration ability， and the cellular uptake capacity of GA-ICG-Lip-gel. RESULTS GA-ICG-Lip-gel existed in a solution state at room temperature and transformed into a gel state at 37 ℃. Its microstructure was dense with small pores， and its encapsulation efficiency and drug loading were （96.07±0.86） % and （6.28±1.16） %， respectively. After exposure to near-infrared light， the temperature of GA-ICG-Lip-gel rose above 42 ℃， with no significant attenuation observed in the heating curve. The heating efficiency was dependent on both the irradiation time and drug concentration. Compared to media without gelatinase， the cumulative release rate of GA-ICG-Lip-gel increased in media containing gelatinase. In vitro studies showed that GA-ICG-Lip-gel could be efficiently taken up by MCF-7 cells； GA-ICG-Lip-gel significantly inhibited the viability and migration ability of MCF-7 cells （ P ＜0.05）， and this inhibitory effect was further enhanced under near-infrared light irradiation. CONCLUSIONS This study successfully prepares GA-ICG-Lip-gel， which exhibits favorable photothermal conversion properties and temperature/enzyme dual-responsive drug release characteristics， and demonstrates significant inhibitory effects on the proliferation and migration of breast cancer cells.

Mucosal immune system is an important part of the body′s immune system, and mucosal tissues that are widely distributed in the respiratory tract, digestive tract and urogenital tract are the main places where local specific immune responses occur. Mucosal surface is the gateway to direct contact with external pathogens, and most pathogens invade the body through mucous membranes, so mucosal immunity is the first line of defense against pathogen infection. Mucosal vaccines offer the potential to generate a strong protective immune response at the primary site of pathogen infection, but there are very limited mucosal vaccines currently on the market. In this paper, the composition of mucosal immune system, antigen uptake, and challenges in the development of mucosal vaccines are reviewed, which provides ideas for further research of mucosal vaccines.

OBJECTIVE To explore the expressions of eosinophilic chemotactic factor 11(CCL11),leukotriene B4(LTB4),percentage of neutrophils(NEUT％)and C-reactive protein(CRP)in peripheral blood of the children with Mycoplasma pneumoniae(MP)infection complicated with plastic bronchitis and analyze the clinical signifi-cance.METHODS A total of 80 children with MP pneumonia complicated with plastic bronchitis who were trea-ted in the Second Hospital of Longyan City,Fujian Province from Jan.2020 to Dec.2023 were assigned as the study group,and 115 patients with MP pneumonia were chosen as the control group.The clinical data,manifesta-tions and Pediatric Risk of Mortality Ⅲ(PRISM Ⅲ)score were statistically analyzed.The levels of peripheral blood CCL11,LTB4,NEUT％and CRP were observed and compared between the two groups.Pearson analysis was performed for the associations of the levels of CCL11,LTB4,NEUT％and CRP with the PRISM Ⅲscore.The value of the joint detection of CCL11,LTB4,NEUT％and CRP in diagnosis of the MP pneumoni-a-induced plastic bronchitis was analyzed.RESULTS There were significant differences in reduction of bronchial breathing sound,pleural effusion and PRISM Ⅲ score between the two groups(P＜0.05).There were significant differences in the levels of peripheral blood CCL11,LTB4,NEUT％and CRP between the study group and the control group(P＜0.05);the CRP level of the study group was(29.42±8.14)mg/L,higher than that of the control group(t=10.138,P＜0.001).The levels of CCL11,LTB4,NEUT％and CRP were positively correlated with the PRISM Ⅲ score(r=0.723,0.710,0.771,0.754,respectively,all P＜0.001).The area under the curve(AUC)of the single detection of CCL11,LTB4,NEUT％and CRP was remarkably higher in diagnosis of MP pneumonia-induced plastic bronchitis than that of the joint detection of the four markers(P＜0.05).CONCLUSIONS The children with MP pneumonia complicated with plastic bronchitis show increased expressions of CCL11,LTB4,NEUT％and CRP.The four markers are positively correlated with the PRISM Ⅲ score.The four markers have high values in diagnosis of the MP pneumonia complicated with plastic bronchitis.

OBJECTIVE To explore the expressions of eosinophilic chemotactic factor 11(CCL11),leukotriene B4(LTB4),percentage of neutrophils(NEUT％)and C-reactive protein(CRP)in peripheral blood of the children with Mycoplasma pneumoniae(MP)infection complicated with plastic bronchitis and analyze the clinical signifi-cance.METHODS A total of 80 children with MP pneumonia complicated with plastic bronchitis who were trea-ted in the Second Hospital of Longyan City,Fujian Province from Jan.2020 to Dec.2023 were assigned as the study group,and 115 patients with MP pneumonia were chosen as the control group.The clinical data,manifesta-tions and Pediatric Risk of Mortality Ⅲ(PRISM Ⅲ)score were statistically analyzed.The levels of peripheral blood CCL11,LTB4,NEUT％and CRP were observed and compared between the two groups.Pearson analysis was performed for the associations of the levels of CCL11,LTB4,NEUT％and CRP with the PRISM Ⅲscore.The value of the joint detection of CCL11,LTB4,NEUT％and CRP in diagnosis of the MP pneumoni-a-induced plastic bronchitis was analyzed.RESULTS There were significant differences in reduction of bronchial breathing sound,pleural effusion and PRISM Ⅲ score between the two groups(P＜0.05).There were significant differences in the levels of peripheral blood CCL11,LTB4,NEUT％and CRP between the study group and the control group(P＜0.05);the CRP level of the study group was(29.42±8.14)mg/L,higher than that of the control group(t=10.138,P＜0.001).The levels of CCL11,LTB4,NEUT％and CRP were positively correlated with the PRISM Ⅲ score(r=0.723,0.710,0.771,0.754,respectively,all P＜0.001).The area under the curve(AUC)of the single detection of CCL11,LTB4,NEUT％and CRP was remarkably higher in diagnosis of MP pneumonia-induced plastic bronchitis than that of the joint detection of the four markers(P＜0.05).CONCLUSIONS The children with MP pneumonia complicated with plastic bronchitis show increased expressions of CCL11,LTB4,NEUT％and CRP.The four markers are positively correlated with the PRISM Ⅲ score.The four markers have high values in diagnosis of the MP pneumonia complicated with plastic bronchitis.

Mucosal immune system is an important part of the body′s immune system, and mucosal tissues that are widely distributed in the respiratory tract, digestive tract and urogenital tract are the main places where local specific immune responses occur. Mucosal surface is the gateway to direct contact with external pathogens, and most pathogens invade the body through mucous membranes, so mucosal immunity is the first line of defense against pathogen infection. Mucosal vaccines offer the potential to generate a strong protective immune response at the primary site of pathogen infection, but there are very limited mucosal vaccines currently on the market. In this paper, the composition of mucosal immune system, antigen uptake, and challenges in the development of mucosal vaccines are reviewed, which provides ideas for further research of mucosal vaccines.

Objective:To analyze the impact of implementing regular supervision and communication based on employee needs in the management of head nurses on improving the nursing practice environment, for reference for improving the nursing proctice environment.Methods:In December 2020 and January 2022, convenience sampling method was used to select 5 nursing unit nurses from a hospital which implemented regular supervision and communication based on employee needs(January to December 2021) as the research subjects. The survey was conducted using the Gallup Q12 questionnaire(Q12 questionnaire), which included 12 items from 4 dimensions: basic needs, head nurse support, team cooperation, and self growth. At the same time, a focus group interview method was made to interviews 10 survey subjects regarding their regular supervision and communication experiences.Results:A total of 165 survey subjects were included in this study, including 77 before and 88 after the implementation.The average total score of the Q12 questionnaire increased from 53.75 points before implementation of supervision communication to 56.96 points after implementation, with a statistically significant difference( P<0.05). The scores of the four dimensions of basic needs, head nurse support, team collaboration, and self growth increased from 4.59 points, 4.41 points, 4.50 points, and 4.45 points before implementation to 4.84 points, 4.69 points, 4.75 points, and 4.75 points after implementation, with statistical significances( P<0.05). The interview results showed that supervisory communication can create a humanistic care atmosphere, enhance team cohesion, enhance self-efficacy, improve work efficiency, solve problems in a timely manner, and improve nursing quality. Conclusions:Implementing regular supervision and communication based on employee needs can strengthen the connection between the head nurse and nurses, and enhance nurses′ recognition of basic needs, head nurse support, teamwork, and self growth. It was conducive to creating a good nursing practice environment, meeting the emotional and growth needs of nurses, and improving their job satisfaction.

Objective:To analyze the molecular epidemiological characteristics of measles virus (MV) in Beijing from 2015 to 2019, and to provide laboratory basis for measles elimination.Methods:Measles virus-positive throat swab samples were collected through the Beijing Measles Laboratory network from 2015 to 2019. After the viral nucleic acid was extracted, 450 nucleotide fragments of the C terminal of the N gene of MV were amplified by RT-PCR. Nucleotide sequencing was performed for the amplified products. The phylogenetic tree was constructed with the representative strains of WHO measles virus genotype D8 genotype reference strains in China and other countries. Genotype identification was conducted and the nucleotide and amino acid homology analysis was carried out. A descriptive analysis of measles cases with D8 and B3 genotypes was conducted.Results:From 2015 to 2019, the genotypes of 546 MV were identified in the city, including 531 of H1a genotype, five vaccine strains, one of B3 genotype, and nine of D8 genotype, among which eight were epidemic strains in 2019. The homology of indigenous H1a genotype MV nucleotide and amino acid was 91.5%-100.0% and 73.6%-100.0%.In 2019, all eight cases of D8 genotype measles were adults, with two being an outbreak and the remaining six sporadic cases.Conclusions:The imported D8 genotype had become the main MV genotype in Beijing in 2019. With the decrease of measles incidence in 2019, native genotype H1a was no longer dominant, while other different genotypes were imported, forming a mixed epidemic trend. It was suggested that in the elimination of measles in Beijing, efforts should be made not only to block the transmission of local measles virus, but also to prevent and control the import and continuous transmission of non-local genotype virus, so as to avoid the risk of establishing local transmission by gradually evolving into a dominant strain.

Objective:To study the prevalence and gene variation characteristics of human coronavirus (HCoV) in Beijing and provide molecular epidemiological basis for the prevention and control of HCoV infection.Methods:This study collected 287 samples and epidemiological data of HCoV positive cases collected by respiratory multi-pathogen surveillance in Beijing from 2016 to 2017, and analyzed the HCoV detection rate, population and seasonal characteristics. HCoV pol gene fragments were amplified by RT-PCR for HCoV typing and evolutionary analysis.Results:In this study, the detection rate of HCoV was 1.89%. The co-infection rate of respiratory virus in HCoV positive samples was 20.56% (59/287). 69 strains were identified as type OC43 with nucleotide homology of 97.2%~100% and amino acid homology of 92.2%~100%. Thirty-nine strains were identified as type 229E with nucleotide homology of 99.2%~100% and amino acid homology of 99.2%~100%. Ten strains were identified as type HKU1 and 2 strains were identified as type NL63.Conclusions:OC43 and 229E are still the main types of HCoV in Beijing from 2016 to 2017, and both present certain seasonal difference. The endemic strains of the same type have high homology of nucleotide and amino acid.

Objective To analyze the genotypes and the variation trend of rubella virus strains circulating in Beijing and to provide a scientific guidance for the prevention and control of rubella.Methods The viral nucleic acids were extracted from diagnostic pharyngeal swab specimens collected by Beijing rubella laboratory.The 739 nucleotides of rubella E1 gene were amplified by reverse transcription-polymerase chain reaction ( RT-PCR) .The amplified products were sequenced and analyzed.Genotypes of the rubella virus strains circulating in Beijing and variations in their nucleotides and amino acids were analyzed by comparing with those of the WHO recommended rubella virus reference strains.Results The target nucleotide se-quences of 10 rubella virus strains were obtained for molecular epidemiological study.All of the 10 strains belonged to 2B genotype and formed an independent branch according to the phylogenetic tree based on the 739 nucleotide fragments of E1 gene.Most of the nucleotide mutations occurred in the 10 strains were non-sense mutations.The amino acid sequences of the circulating strains were highly conservative.No significant mutations in the antigenic sites were identified in the rubella virus strains circulating in Beijing except that one amino acid mutation from Ser to Phe in the No.282 amino acid of E1 protein was identified in the hemag-glutination inhibition and neutralizing site of one strain.Conclusion This study indicated that the rubella virus genotype 2B epidemic strains were isolated in Beijing.

In this study, a neutral desorption-extractive electrospray ionization mass spectrometry ( ND-EESI-MS) method was developed for the direct and rapid detection of dichlorvos ( DDVP) in honey samples without any sample pretreatment procedure. Under the positive ionization mode, the main characteristic parent ion of DDVP was m/z 223 (MW:222) and daughter ions were m/z 109 and m/z127. Under the optimized working conditions, with the signal intensity of m/z 127 as quantitative index, the quantitative information of DDVP residues in honey was acquired effectively. The results showed that the linear range of DDVP for spiked honey was 5-1000 ng/mL (R2=0. 998) with the limit of detection (LOD) of 1. 0 ng/mL (n=3) and the recoveries for the DDVP spiked honey samples at the concentration levels of 10 , 30 and 400 ng/mL were 93 . 0%-103. 0%, with the relative standard deviations (RSDs, n=6) of less than 4. 4%. Meanwhile, for detection of spiked honey with gas chromatography-flame photometric detector ( GC-FPD ) , the linear range was 5-1000 ng/mL (R2=0. 999) with the LOD of 1. 6 ng/mL(n=3), and the recoveries of DDVP at the spiked honey concentration levels of 10 , 30 and 400 ng/mL were 94 . 9%-110 . 3%, with the RSDs of less than 7. 6%.