Airway problems in foetus that may cause airway obstruction can be safely managed by using an ex utero intrapartum technique(EXIT).The EXIT procedure maintains a period of uteroplacental circulation for fetal oxygenation during delivery to provide time to explore and secure the airway of the fetus or to perform fetal operations before the umbilical cord is clamped.The common indication for the EXIT procedure is the presence of foetal airway obstruction,which is usually caused by neck mass,congenital diaphragmatic hernia,congenital high way obstruction syndrome,thoracic abnormality,congenital heart and lung dysfunction,conjoined twins,and so on.It avoids the acute airway obstruction in a neonate that has disastrous consequences.

Objective: To find out an effective way of the rehabilitation treatment in aged patients with cor pulmonale.Method: 30 cases of aged patients with cor pulmonale in rehabilitation stage were treated with high frequency ventilation diaphagm pacemaker(HDP). Result:The PaO2 and lung function were significantly improved and the level of the plasma endothelin - 1 was significantly lowered after the rehabilitation treatment. Conclusion: HDP is a safe and effective way to patients with cot pulmonale for convalescent treatment.

For understanding the effect of MDG-1, a water-soluble β-D-fructan polysaccharide from Ophiopogon japonicas, on intestinal microecological balance, especially on the changes of lactobacillus, sixty 8-week-old male C57BL/6J mice were given a high-fat diet for six weeks and were also gavaged with saline once a day simultaneously. Then the mice which is below 30 grams or dropped more than 10% through lavage were eliminated and the rest were randomly divided into four groups: diet-induced obese (DIO) model group (n = 12, gavaged with saline), low-dose MDG-1 group (n = 12, gavaged with MDG-1, 75 mg · kg(-1)) , medial-dose MDG- 1 group (n = 12, gavaged with 150 mg · kg(-1)), and high-dose MDG-1 group (n = 12, gavaged with 300 mg · kg(-1)) according to the weight and blood glucose; the model group and MDG-1 group were placed on a high-fat diet while the normal control group (n = 12, gavaged with saline) were kept on a low-fat diet through the experiment. After 12-weeks of treatment, feces samples were collected and cultured for intestinal microecological balance analysis. Then the intestinal probiotics were cultured through traditional methods combined with modified gradient gel electrophoresis (DGGE) method. The changes of lactobacillus in each treatment group were also detected by a statistical analysis of the total number of the intestinal flora. We have established the phylogenetic tree by 16S rDNA sequencing and use some molecular identification methods such as PCR-DGGE to analyse the changes of the dominant bacteria floras, and also get the pure culture. In conclusion, different concentrations of MDG-1 can increase the number of the intestinal probiotics, especially Taiwan lactobacillus and Lactobacillus murinus, and improve their diversity and promote proliferation in a dose-dependent way.
Animals ; Biodiversity ; Diet, High-Fat ; adverse effects ; Dietary Carbohydrates ; administration & dosage ; analysis ; Humans ; Intestines ; drug effects ; metabolism ; microbiology ; Lactobacillus ; classification ; drug effects ; genetics ; growth & development ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Obese ; Molecular Structure ; Obesity ; drug therapy ; metabolism ; microbiology ; Ophiopogon ; chemistry ; Phylogeny ; Plant Extracts ; administration & dosage ; chemistry ; Polysaccharides ; administration & dosage ; chemistry

Abstract: Objective To collect the cases of laboratory-acquired infections (LAI) reported in literatures in China, summarize the infection routes and causes of LAI in China, in order to improve laboratory staff's understanding of its occupational health and safety risks. Methods　The cases of laboratory-acquired infection reported in domestic literatures were collected from PubMed, CNKI, Wanfang Database, CBM China Biomedical Literature Database up to April 11, 2022, retrospectively analyze the number and causes of LAI reports, the main risk factors of LAI and its harm to society, the consequences of LAI or the leakage of pathogenic microorganisms, and put forward the relevant countermeasures of biological safety. Results　A total of 22 LAI reports were collected, reviewed and integrated into 21 reports. There were 7 kinds of pathogenic microorganisms. The main pathogenic microorganisms were hantavirus (42.86%, n=9) and Brucella (33.33%, n=7). There were 122 cases and 3 deaths in the laboratory. Most of the reports came from research laboratories (66.67%, n=14). The main route of infection was inhalation of aerosol (42.86%, n=9), followed by transdermal route (38.09%, n=8). Conclusions Failure to report LAI events will increase the risk of pathogenic microorganisms spreading to people outside the laboratory and the environment through infected laboratory staff. Local health institutions and laboratories should be encouraged to report LAI cases as a powerful tool for monitoring accidental leakage of pathogenic microorganisms and further improving laboratory biosafety. The laboratory needs strong biosafety measures to protect staff's health and prevent environmental pollution caused by accidental leakage of pathogenic microorganisms.

Objective To clone full length gene sequence containing open reading frame (ORF) of Schistosoma japonicum SJCHGC08304, analyse its category encoding Wnt protein, and to understand the mRNA expression dynamics of the gene during different developmental stages. Methods Based on a EST identified in Genbank, the full length gene of SJCHGC08304 was cloned with RACE technique from 7 d hepatic schistosomula and 42 d adult worms, and its complete ORF was analysed by bioinformatics tools. The expression of the gene during different developmental stages was analysed by using Real-time fluorescent quantitative PCR technique. Results A new gene was obtained, containing a complete ORF with 2 604 nucleotides, and encoding 867 amino acid with 98.264 kD of molecular mass. Real-time fluorescent quantitative PCR showed that the mRNA level of this gene was the highest in the 18 d schistosomula, followed by 14 d schistosomula, 42 d male worms, 32 d adult worms, egg, 23 d adult worms, 27 d adult worms, respectively, and there were no expression of the gene in 42 d female worms. Conclusions The gene has a typical characteristics of Wnt frizzled family proteins, the similarity is best to Xenopus laevis. By comparison analysis to speculate as Fz5 gene, we denominate this gene as "sjFz5" (GenBank accession No. EU370926). SjFz5 has differential expressions during different developmental stages.

Adenosquamous lung carcinoma(ASLC) was a rare pathologic type of the lung cancer. In order to improve the levels of the diagnosis and the treatment of ASLC,we analysed the clinical features of 71 cases of ASLC in our hospital from January 1993 to January 2000 retrospectively. The results showed that there was an evidence of young age in its occurrence.The majority of this type of cancer was located peripherally. It occurred most frequently in the posterior segments of the upper lobes and superior segments of the lower lobes. The biopsy obtained by surgery was the most reliable diagnostic way for the determination of pathologic type. The prognosis was poor. The five year survival rate after surgical operation was 12.2%. Early diagnosis may be made in routine general check up. An early diagnosis and surgical treatment could prolong surviving time of the patients.

Objective To explore the liver pathology from live related liver transplatation(LRLT) of Wilson′s disease(WD) in children,and evaluatethe indication of LRLT.Methods The sample of this study,including the donater and patient,came from the LRLT. It was observed with HE,MASSON,Timm′s and Rubeanic staining.Results With HE and MASSON stainning,hepatocyte showed degeneration,fiber hyperplasic and false lobule formed;Timm′s and Rubeanic stainning showed typical black deposit of granules and conglomerations.Liver pathology revealed that liver cirrhosis appeared,and it was diffrentent from Child Pugh.Conclusions It is of great significance that the liver pathology is useful for the treatment of WD.If liver pathology supportes,the indication of LRLT can be measurably broadened.

Objective To investigate the effect of immunoglobulin G (IgG) in bullous pempbigoid (BP) blister fluid on the secretion of chemokines by human keratinocytes. Methods IgG was obtained from the blister fluid of patients with bullous pemphigoid and sera of normal human controls, then purified by sequential precipitation with caprylic acid and ammonium sulfate. The immunological activity of blister fluid was tested before and after the purification by BP180 ELISA kit. Keratinocytes were isolated from the foreskin tissue of yong adults, and subjected to primary culture. After 3 passages, the primary keratinocytes were harvested and subcultured in the presence of purified IgG of 0.5, 1, 2, 4 and 8 g/L, respectively, for 24 hours, or IgG of 4 g/L for 3, 6, 12, 24 hours, respectively, followed by the detection of levels of eotaxin, monocyte chemoattractant protein (MCP)-1 and interleukin (IL)-8 in the supemate of keratinocytes by ELISA. Results The valence of IgG remained unchanged after the purification with caprylic acid and ammonium sulfate. Compared with IgG from the sera of normal controls, that from bullous pemphigoid blister fluid sig- nificantly enhanced the secretion of IL-8 by keratinocytes in a time- and dose-dependent manner (both P < 0.01 ). Neither eotaxin nor MCP-1 was detected in the supemate of control IgG-treated, BP IgG-treated or untreated keratinocytes. Condusions The IgG in BP blister fluid has been proved to stimulate the secretion of IL-8 by cultured human keratinocytes, which may be involved in the pathogenesis of BP.

Objective To construct a recombinant plasmid DNA containing herpes simplex virus type 1(HSV-1) glycoprotein D (gD) gene.Methods The HSV-1 gD gene was obtained by polymerase chain reaction (PCR) and inserted into TA cloning vector pGEM-T, then cloned into the eukaryotic expression vector pcDNA3.1 to generate pLy-D. The recombinant plasmid pLy-D, which was confirmed by partial sequencing and restriction endonuclease analysis, was transfected into Cos-7 cells and used to inoculate ICR mice via muscular injection. Immunohistochemistry and enzyme-linked immunoabsorbent assay (ELISA) were employed to test the gD expression in transfected cells and the specific anti-HSV-1 antibody in the serum of immunized mice, respectively.Results The gD eukaryotic expression plasmid pLy-D was constructed. Using the immunohistochemistry technique, the gD expression in pLy-D-transfected cells was detected. The ELISA demonstrated that specific anti-HSV-1 antibody could be induced in immunized mice after three times injection.Conclusions We constructed HSV-1 gD eukaryotic expression plasmid pLy-D which could express gD protein in transfected cells and could induce humoral immune response in mice. This observation will be helpful in designing HSV prophylactic vaccine.

Objective To investigate the effect of the cerebral infarction in rats and the role of matrix metalloproteinases-2 (MMP-2), matrix metalloproteinases-9 (MMP-9), and tissue inhibitor of metalloproteinases-3 (TIMP-3) in the pathogenesis. Method Sixty-six rats were randomly divided into 3 groups: blank group (n= 6), control group (n=30), model group (n=30). The rat model was established by carotid injection of auto blood thrombus, the control group was given the operation without injection. Each group was subdivided into 24 hours, 48 hours, 3 days, 5 days, 7 days after operative intervention. At serial intervals, the animals in each group were sacrificed and brain tissue samples were collected to determine MMP-2, MMP-9, TIMP-3 expression by immunohistoehemistry. The changes of behaviors were observed and the histopathological changes were investigated by hematoxylin and eosin stain. Results The experimental group had more obvious behavior change than other groups. Hematoxylin and eosin stain showed significant histopathological changes; MMP-2, MMP-9 and TIMP-3 expression was up-regulated in comparison with other groups (P