Effect of breastfeeding on the development of infection-related diseases during hospitalization in late preterm infants in 25 hospitals in Beijing, China / 中国当代儿科杂志

OBJECTIVE@#To investigate the incidence rate of infectious diseases during hospitalization in late preterm infants in Beijing, China, as well as the risk factors for infectious diseases and the effect of breastfeeding on the development of infectious diseases.@*METHODS@#Related data were collected from the late preterm infants who were hospitalized in the neonatal wards of 25 hospitals in Beijing, China, from October 23, 2015 to October 30, 2017. According to the feeding pattern, they were divided into a breastfeeding group and a formula feeding group. The two groups were compared in terms of general status and incidence rate of infectious diseases. A multivariate logistic regression analysis was used to investigate the risk factors for infectious diseases.@*RESULTS@#A total of 1 576 late preterm infants were enrolled, with 153 infants in the breastfeeding group and 1 423 in the formula feeding group. Of all infants, 484 (30.71%) experienced infectious diseases. The breastfeeding group had a significantly lower incidence rate of infectious diseases than the formula feeding group (22.88% vs 31.55%, @*CONCLUSIONS@#Breastfeeding can significantly reduce the incidence of infectious diseases and is a protective factor against infectious diseases in late preterm infants. Breastfeeding should therefore be actively promoted for late preterm infants during hospitalization.

A study on the effect of indomethacin on SiO2 induced lysozyme over-expression in rat alveolar macrophages / 预防医学

Objective To learn the effect of indomethacin (IND)of different concentrations on the expression of lysozyme protein induced by SiO2 in rat alveolar macrophages (AM).Methods Pure AM was prepared with the method of bronchoalveolar lavage in rats.In the model group,the silica dust poisoning model was replicated by adding SiO2 dust suspension (50 μg /ml).In the intervention group,following the adding of SiO2 dust suspension,the IND of 1 0 -5 ,1 0 -4 , and 1 0 -3 g/ml were added respectively.In the control group,the same volume of PBS was given.After 8 h,1 6 h,the cell morphology was observed.Results Compared with the model group,the AM cells in the intervention group were relatively complete,and that there was a concentration dependent trend.The expression of LSZ protein in AMof the model group was significantly higher than that of the control group (P<0. 05 ),while the expression of LSZ protein in the intervention group decreased compared with that of the model group.After incubation with IND and SiO2 ,the expression of LSZ protein in the intervention group decreased compared with that of the model group.Conclusion IND can inhibit the increased expression of LSZ protein in AMcaused by the stimulation of SiO2dust,and can reduce the damage of SiO2on the membrane of alveolar macrophage and thus has the protective effect on the AM cell membrane.

Expression of microRNA-203 and P63 in human epidermal stem cells and keratinocytes / 中华烧伤杂志

<p><b>OBJECTIVE</b>To observe the changes in expression of microRNA-203 and P63 in human epidermal stem cells and KCs, and to investigate their effects and significance in the epidermal proliferation and differentiation.</p><p><b>METHODS</b>(1) Five normal foreskin tissue specimens were collected from 5 patients by circumcision in Department of Urinary Surgery of the First Affiliated Hospital of Nanchang University from March to June in 2013. Then single cell suspension was obtained by separating epidermis with trypsin digestion method. The cells were divided into quick adherent cells and non-quick adherent cells by type IV collagen differential adherent method. The biological characteristics of cells were observed by inverted phase contrast microscope immediately after isolation and on post culture day (PCD) 3. The expression of CD29, keratin 19, keratin 1, and keratin 10 was identified by immunocytochemical staining. The expression of microRNA-203 and mRNA of P63 was determined by real-time fluorescent quantitative RT-PCR. The protein expression of P63 was determined by Western blotting. Data were processed with t test and Pearson correlation analysis.</p><p><b>RESULTS</b>(1) Immediately after isolation, quick adherent cells were small, round, and dispersed uniformly. On PCD 3, the cells adhered firmly, and they grew in clones. Immediately after isolation, non-quick adherent cells appeared in different shapes and sizes, and dispersed unevenly. On PCD 3, the cells adhered precariously and did not show clonal growth. Quick adherent cells showed positive expression of CD29 and keratin 19, while non-quick adherent cells showed positive expression of keratin 1 and keratin 10. Quick adherent cells were identified as epidermal stem cells, and non-quick adherent cells were identified as KCs. (2)The expression level of microRNA-203 in epidermal stem cells (0.74 ± 0.20) was lower than that in KCs (3.66 ± 0.34, t =16.582, P <0.001). The mRNA expression level of P63 in epidermal stem cells (4. 16 ± 0.28) was higher than that in KCs (2.90 ± 0.39, t =5. 850, P =0.001). The protein expression level of P63 in epidermal stem cells (1.42 ± 0.05) was higher than that in KCs (0.73 ± 0.03, t =26.460, P <0. 001). (3) The expression level of microRNA-203 was in significantly negative correlation with the expression levels of mRNA and protein of P63 (with r values respectively - 0. 94 and -0.98 , P values below 0.05).</p><p><b>CONCLUSIONS</b>The expression levels of microRNA-203 and P63 in human epidermal stem cells and KCs were significantly different, which might be related to the different characteristics of proliferation and differentiation of the cells.</p>

Quality of life of inpatients with coal workers' pneumoconiosis and its influential factors / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the quality of life ( QOL) of inpatients with coal workers' pneumoconiosis( CWP) and analyse its influential factors, and to provide a theoretical basis for effective control measures.</p><p><b>METHODS</b>Eighty-eight CWP patients in a hospital were included in the study. A questionnaire survey was conducted in them using a self-designed QOL scale. A database was established by software EpiData3.1, and the obtained data were statistically analyzed by software SPSS 16.0.</p><p><b>RESULTS</b>Of the 88 patients, 73( 82.9%) had middle-level QOL, with a mean QOL loss rate of 36.2%; the loss rates of physical function and somatic sensation were the highest ( 44.2% and 41.5%). The patients with stage II CWP had significantly lower physical function than those with stage I and III CWP; the physical function and social function of patients significantly decreased with age; the personal income, household income, and housing condition of the patients had a marked impact on their physical and psychological functions, and the housing condition and education level had a marked impact on their social function. The multivariate analysis showed that old age, low income,and poor housing condition were the main adverse factors for the QOL of inpatients with CWP.</p><p><b>CONCLUSION</b>The QOL of inpatients with CWP declines significantly, and their QOL is related to the age, income, and satisfaction with housing condition.</p>

Annexin A5 gene polymorphism (-1C/T) and the susceptibility to pneumoconiosis in coal works / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To explore the role of -1C/T single nucleotide polymorphism within Annexin A5 gene in the genetic susceptibility to coal worker's pneumoconiosis (CWP).</p><p><b>METHODS</b>Four hundred and seventy CWP Han chinese patients and 428 Han chinese controls were enclosed in present case-control study. All subjects were exposed to coal dusts. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was used to detect the -1C/T SNP in Annexin A5 gene for all subjects. The relationship between the -1C/T SNP in Annexin A5 gene and CWP was analyzed.</p><p><b>RESULTS</b>CT/TT genotype in -1C/T SNP was associated with a significantly decreased risk of CWP, as compared with the CC genotype among subgroups exposed to coal dusts for ≥ 27 years (adjusted OR = 0.65, 95%CI: 0.44 - 0.98, P = 0.039) and patients with CWP at stage II (adjusted OR = 0.55, 95%CI: 0.34 - 0.90, P = 0.028).</p><p><b>CONCLUSION</b>The results of present study suggest that the Annexin A5 -1C/T polymorphism may be involved in the development of CWP in Han Chinese coal miners.</p>

Analysis on the incidence of coal workers' pneumoconiosis from 2003 to 2008 in a coal mining group / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>Analyzed associations among the incidence of coal workers' pneumoconiosis from 2003 to 2008, jobs, exposure years and cumulative total dust exposure levels (CTE) and found the current characteristics of the mine incidence of pneumoconiosis disease.</p><p><b>METHODS</b>collected the health care information of the new diagnosed pneumoconiosis of underground mine workers from 2003 to 2008 and the dust monitoring data of underground mine from 1949 and estimated the personnel cumulative total dust exposure levels (CTE); analyzed the incidence features of the new diagnosed pneumoconiosis.</p><p><b>RESULTS</b>The rates of health surveillance of workers were gradually improved from 2003 to 2008 and 296 new coal workers pneumoconiosis were diagnosed. The total incidence was 0.57%, and the average annual rate was 0.32%. Among the new diagnosed cases, phase I accounted for 90.5% and the 87.2% from coal mine drillers. The shortest exposure period was 3 years and the longest was 38 years, and the cumulative total dose of dust was varied between 86.1 and 4926 mg/m(3) per year. The total dust accumulated limited dose was calculated by the percentile method to prevent 99% of miners from pneumoconiosis, which was 120.6 mg/m(3) per year, so we suggested that the exposure years should be shorter than 13 years under the current working conditions.</p><p><b>CONCLUSIONS</b>Preventive coal workers' pneumoconiosis should be focused on mine drillers and their limited exposure years should be within 13 years.</p>

Polymorphisms in Fas pathway genes and risk of coal worker pneumoconiosis / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To explore the possible association between six single nucleotide polymorphisms (SNPs) of Fas pathway genes and the risks of coal worker pneumoconiosis (GWP).</p><p><b>METHODS</b>This case-control study consisted of 511 male patients with CWP and 530 male controls from the same coal mines. Five SNPs of Fas pathway genes were detected by restriction fragment length polymorphisms (PCR-RFLP) and CASP3 (rs6948) was genotyped by quantitative real-time polymerase chain reaction (qRT-PCR).</p><p><b>RESULTS</b>There were no differences of genotype frequencies of 6 SNPs between cases with CWP and controls. A significant increased risk of CWP was found in subjects with CASP8-652DD genotype as compared to subjects with CASP8-652II genotype (P < 0.05), and the further stratification analysis showed that smoking cases with CWP stage I, long exposure time and CASP8-652DD genotype had high risk of CWP (P < 0.05). The analysis of gene-gene interactions indicated that the carriers with FAS-1377GG/CASP8-652DD, FAS-670AG/CASP8-652DD and FASL-844CT/CASP8-652DD had the increased risk of CWP, and the carriers with FAS-1377GA/CASP8-652ID had the reduced risk of CWP. There were no significant differences of exposure times among the cases with CWP stage I and 3 genotypes of CASP8-652.</p><p><b>CONCLUSION</b>CASP8-652 6N DD genotype may play a role in CWP development and interact with SNPs of FAS-1377, FAS-670 and FASL-844.</p>

Relationship between FAS/FASL gene polymorphisms and susceptibility of coal worker's pneumoconiosis / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the effects of FAS and FASL gene polymorphisms on genetic susceptibility of coal worker's pneumoconiosis and their relationship to the pulmonary fibrosis.</p><p><b>METHODS</b>340 with coal worker's pneumoconiosis (CWP) and 312 coal mine workers (controls) exposed to the coal dusts were selected. FAS-1377G > A, FAS-670A > G and FASL-844T > C gene polymorphisms were analyzed by PCR-RFLP techniques.</p><p><b>RESULTS</b>The distribution frequencies of genotypes of FAS-1377, FAS-670, FASL-844 genotypes in CWP had no significant differences compared to the control. Compared to CWP patients with exposure year > or = 25, the risk of pneumoconiosis with FAS-1377 GA/AA genotype was significantly higher than those with FAS-1377GG in the patients working age < 25 years (P = 0.098, 95% CI: 0.932 approximately 2.298); the risk of CWP in those with FAS-670AG genotype was higher than those with FAS-670GG genotype (P = 0.098, 95% CI: 0.928 approximately 2.404) the risks of CWP in those with FASL-844TT genotype and FASL-844TC genotype were respectively higher than those with FASL-844CC genotype (P = 0.039, 95% CI: 1.088 approximately 27.358, P = 0.089, 95% CI: 0.852 approximately 2.101). The frequencies of genotypes of FASL-844T > C were significantly different between CWP patients with exposure year > or = 25 and < 25. The risk of CWP with FASL-844TT genotype was significantly higher than that of FASL-844TT + TC (P = 0.054, 95% CI: 0.971 approximately 23.833). The risk of CWP patients with FASL-844TT/CT + FAS-1377GA genotype was 1.810-fold than the patients with FASL-844CC + FAS-1377GG genotype. The risk of CWP patients with FASL-844TT/CT + FAS-670AG genotype was 2.117-fold than the patients with FASL-844CC + FAS-670AA genotype. The risk of CWP patients with FASL-844TT/TC + FAS-1377GA/AA + FAS-670AG/GG genotype was 2.043-fold than the patients with FASL-844CC + FAS-1377GG+FAS-670AA genotype.</p><p><b>CONCLUSION</b>FAS-1377G > A, FAS-670A > G and FASL-844T > C gene polymorphisms may not be associated with the susceptibility of CWP in Han nationality, but these three gene polymorphisms and their joint actions may influence on the progression of CWP.</p>