Analysis of Genome-Wide DNA Methylation Differences in Umbilical Cord Blood Nucleated Red Blood Cells Between Term and Preterm Infants / 中国实验血液学杂志

OBJECTIVE@#To analyze the genome-wide DNA methylation differences in umbilical cord blood nucleated red blood cells (NRBCs) between term and preterm infants by using the methylation gene chip technology, and to screen the genes of differential methylation and biological signaling pathways which may be related to the expression of γ-globin gene (HBG).@*METHODS@#Umbilical cord bloods of eight term infants and eight preterm infants were collected, and NRBCs of each sample was isolated, then genome DNA was extracted and bisulfite conversion was performed. The DNA methylation sites were detected by using the Illumina 850K BeadChip. Differential DNA methylation sites were screened, and the function of genes with differential methylation was analyzed by using GO and KEGG enrichment analysis.@*RESULTS@#Compared with the preterm group, 4749 differential DNA methylation sites of term group were screened out, including 4359 hypomethylation sites and 390 hypermethylation sites. GO and KEGG analysis indicated that the function of genes with differential methylation mainly involved in the hemopoietic system, growth and development process, Wnt and Notch signal pathways.@*CONCLUSION@#The differentical methylation sites at genome-wide level in umbilicar cord blood NRBC of term and preterm infants have been obtained, and the signal pathway and genes which possibily related with swiching the expression of γ-globin gene to β-globin gene have been screened-out. This study provide the new targets for studing the mechamism regulating expression of HBG gene.

Analysis of the disease spectrum of Beijing 120 prehospital emergency patients from 2013 to 2017 / 中华疾病控制杂志

Objective To understand the disease spectrum of prehospital emergency patients in Beijing, so as to provide basis for rational allocation of prehospital emergency care resources and for improvement of prehospital emergency care. Methods Emergency dispatch database from 120 dispatching command system of Beijing Emergency Medical Center to was used study the disease spectrum of 120 prehospital emergency patients from 2013 to 2017 in Beijing, and were analyzed the differences of disease spectrum among patients of different years, genders and ages, and the time distribution of different diseases. Results From 2013 to 2017 in Beijing, 1 643 375 patients used 120 prehospital emergency care. The top 3 diseases of the disease spectrum were: injury and poisoning (29.63%), diseases of the circulatory system (18.37%), and diseases of the nervous system (15.80%). The sorting of diseases remained unchanged during the 5 years. The disease spectrums were different among different age groups and gender groups. The calls in spring, summer, autumn and winter accounted for 25.23%, 24.97%, 25.05% and 24.75% respectively. Most calls were made from 08 ∶〗00 to 09 ∶〗59 (12.41%), 12 ∶〗00 to 13 ∶〗59 (10.05%), and 14 ∶〗00 to 15 ∶〗59 (9.91%) during a day. The peak months and hours of different diseases were different. Conclusions The demand for prehospital emergency care has been increasing in Beijing in recent years. It is important to strengthen the prevention of injuries among all ages, especially male, and to improve the prevention and response capacity for acute attack of chronic diseases among older people. Prehospital emergency care resources should be rationally allocated according to the peak months and hours of calls.