Medical students are the reserves of medical and health service in our country. Strengthening medical students' cultivation and improving their professional quality can play an important role in protecting people's health more efficiently. We must think highly of medical students' duty consciousness, creation consciousness, legal consciousness, problem consciousness, service consciousness and cooperation consciousness.We should enable medical students to have healthy medical professional personality and establish the foundation for the sustainable development of the health care industry of our country.

To construct the eukaryotic expression plasmid of human PRX3 and measure its expression in the HEK-293FT cells, the full-length coding region of human PRX3 was cloned by PCR and inserted into the eukaryotic expression vector pcDNA4-Xpress (A). HEK-293FT cells were transiently transfected with the recombinant plasmid. Western blot and immuofluorescence were used to detect the expression of the fusion protein. In the experiment, restriction analysis identified the construction of the recombinant plasmid and the inserted sequence was identical with that published on GenBank. Western blot and immunofluorescence confirmed the expression of the recombinant protein in transfected HEK-293FT cells. It was concluded that the eukaryotic expression plasmid of human PRX3 was constructed successfully and the recombinant could be expressed efficiently in HEK-293FT cells, which provides a sound basis for the further study on human PRX3.
Cell Line, Transformed ; Cloning, Molecular ; Embryo ; Eukaryotic Cells/*metabolism ; Gene Expression ; Genetic Vectors ; Kidney/cytology ; Kidney/*metabolism ; Peroxidases/*biosynthesis ; Peroxidases/genetics ; Plasmids/*genetics ; Transfection

To construct the eukaryotic expression plasmid of human PRX3 and measure its expression in the HEK-293FT cells, the full-length coding region of human PRX3 was cloned by PCR and inserted into the eukaryotic expression vector pcDNA4-Xpress (A). HEK-293FT cells were transiently transfected with the recombinant plasmid. Western blot and immuofluorescence were used to detect the expression of the fusion protein. In the experiment, restriction analysis identified the construction of the recombinant plasmid and the inserted sequence was identical with that published on GenBank. Western blot and immunofluorescence confirmed the expression of the recombinant protein in transfected HEK-293FT cells. It was concluded that the eukaryotic expression plasmid of human PRX3 was constructed successfully and the recombinant could be expressed efficiently in HEK-293FT cells, which provides a sound basis for the further study on human PRX3.
Cell Line, Transformed ; Cloning, Molecular ; Embryo, Mammalian ; Eukaryotic Cells ; metabolism ; Gene Expression ; Genetic Vectors ; Humans ; Kidney ; cytology ; metabolism ; Peroxidases ; biosynthesis ; genetics ; Peroxiredoxin III ; Peroxiredoxins ; Plasmids ; genetics ; Transfection

Objective:To analyze the accuracy of lung ultrasound and chest X-ray in the diagnosis of neonatal pulmonary disease.Methods:We prospectively collected newborns that needed chest X-ray examination to diagnose pulmonary disease from twelve neonatal intensive care units across the country between June 2019 and April 2020.Each newborn was examined by lung ultrasound within two hours after chest X-ray examination.All chest X-ray and lung ultrasound images were independently read by a radiologist and a sonographer.When there was a disagreement, a panel of two experienced physicians made a final diagnosis based on the clinical history, chest X-ray and lung ultrasound images.Results:A total of 1 100 newborns were enrolled in our study.The diagnostic agreement between chest X-ray and lung ultrasound(Cohen′s kappa coefficient=0.347) was fair.Lung ultrasound(area under the curve=0.778; 95% CI 0.753-0.803) performed significantly better than chest X-ray(area under the curve=0.513; 95% CI 0.483-0.543) in the diagnosis of transient tachypnea of the newborn( P<0.001). The accuracy of lung ultrasound in diagnosing neonatal respiratory distress syndrome, meconium aspiration syndrome, pneumonia and neonatal pulmonary atelectasis was similar to that of chest X-ray. Conclusion:Lung ultrasound, as a low-cost, simple and radiation-free auxiliary examination method, has a diagnostic accuracy close to or even better than that of chest X-ray, which may replace chest X-ray in the diagnosis of some neonatal lung diseases.It should be noted that both chest X-ray and lung ultrasound can only be used as auxiliary means for the diagnosis of lung diseases, and it is necessary to combine imaging with the clinical history and presentation.

In recent years, with the rapid development of Chinese domestic surgical robot technology and the expansion of the application market, the "industry-university-research-medicine" collaborative innovation transformation mode has gradually developed and formed. Medical institutions play an important role in multi-party cooperation with enterprises, universities, and research institutes, as well as in product planning, technology research and development, achievement transformation, and personnel training. On the basis of reviewing the current situation of the development of the "industry-university-research-medicine" collaborative innovation transformation mode of domestic surgical robots, this study explores the multiple roles played by medical institutions in this mode and challenges, further putting forward corresponding recommendations.
Humans ; Robotics ; Universities ; Medicine ; Industry ; Technology

ObjectiveTo introduce the Hr gene of spontaneously mutated SHJH^hr mice into BALB/cAShjh inbred mice with clear genetic background,and provide a basis for study on the molecular mechanism of Hr gene mutation-induced abnormal phenotype and the application of this model.Methods Using a backcross-intercross breeding method guided by phenotypic monitoring, mutant genes from SHJH^hr mice bred by spontaneous mutation were introduced into inbred BALB/cAShjh mice by homozygous mutation introgression, and the mice were bred into BALB/cA.Cg.SHJH^hr (abbreviated as C.Cg.SHJH^hr) mice after 10 generations. The genotypes of 90 single nucleotide polymorphism (SNP) detection sites were analyzed in C.Cg.SHJH^hr mice by multiplex PCR library construction followed by next generation sequencing. Then 14 biochemical locus marker genes were detected in C.Cg.SHJH^hr mice according to the method of GB/T 14927.1-2008. Finally, whole genome exon sequencing was utilized to detect the mutated genes in this mouse. ResultsFrom May 2018 to March 2022, a total of 10 generations of backcross-intercross were conducted to complete the construction of the C.Cg.SHJH^hr mouse line. Among the 90 SNPs loci detected, except for rs13484115 and rs13484116, all the other loci had the same genotype as the recipient mice BALB/cAShjh. The results of biochemical marker gene detection showed that all the 14 loci of the mouse were the same as those of the recipient mouse. Whole genome exon sequencing found that the mouse had 109 site mutations compared with the recipient mouse strain, including 71 synonymous mutations, 1 stopgain, 37 missense mutations, and 20 genes involved in protein sequence alterations (including the reported Hr gene). ConclusionC.Cg.SHJH^hr mice were created. Through exon sequencing and genetic analysis, three Hr mutated genes and associated mutated genes that mainly cause phenotypic variations were identified, which provides a basis for expanding the application of C.Cg.SHJH^hr mice in biomedical research.

Objective To measure and analyze biological characteristics and aging phenotype of SHJH^hr mice and provide basic data for the application of the mouse model in aging mechanisms research and antiaging drug development. MethodsWith ICR mice of the same age as control group, the body mass growth data of SHJH^hr mice at the age of 3 to 16 weeks, the reproduction ability of 1 to 4 fetuses and the life cycle of SHJH^hr mice were measured. Blood routine (30 items) and serum biochemical indexes (25 items) of 6-week-old SHJH^hr mice were measured. The venous blood of 8-week-old SHJH^hr mice was collected for flow cytometry analysis to determine the content of immune cells. The aging bone structure of the cancellous bone and bone mineral density of SHJH^hr mice aged 4, 8 and 26 weeks were measured by micro-CT. Histopathological changes of bone and joint of 8-week-old mice were observed. ResultsCompared with ICR mice, the female and male body mass of SHJH^hr mice were significantly lower at the age of 16 weeks (P < 0.05), and the reproductive performance of female mice was low (P < 0.01) or did not have normal reproductive capacity. The shortest survival time of SHJH^hr mice was 57 weeks and the longest was 71 weeks, which was shorter than those of normal ICR mice, showing obvious rapid aging phenomenon. At the same time, some physiological and biochemical indexes of blood and pathological changes of bone and cartilage tissues also showed the accelerated aging and abnormality of animal physiological functions. ConclusionSHJH^hr mice have some biological characteristics of rapid aging as well as some physiological and pathological changes caused by aging.