Objective To explore the high risk factors of different degrees of premature infants with bronchopulmonary dysplasia (BPD) and to provide theoretical basises for the clinical prevention of BPD.Methods The clinical datas of 64 cases patients with BPD who were diagnosed and hospitalized in Neonatology Department of Affiliated Hospital of Qingdao University from June in 2009 to March in 2016 were retrospective analyzed,from several aspects to analyze the BPD's high risk factors,such as the mother's factors,the perinatal factors,treatments after birth and complications.Results There were 27 moderate and mild cases,19 moderate cases and 18 severe cases in children who were diagnosed BPD;different degrees of BPD patients in gender,5 minute's apgar score,the repeated application of PS,long time of mechanical ventilation,high concentration of oxygen inhalation,neonatal pneumonia,blood transfusion and neonatal anemia's differences were significant in the severity of BPD difference (P =0.003,0.033,0.006,0.002,0.001,0.000,0.001,0.001,0.036,0.004).Conclusion Strengthen resuscitation in delivery room,shorten the mechanical ventilation time and reduce the high concentration oxygen inhalation,prevent and reduce the infection after delivery,reduce latrogenic blood loss and the number of blood transfusion are important measures to alleviate the severity of BPD.

Objective:To investigate the difference of accuracy between magnetic induction Freehand-3D ultrasound and two-dimensional ultrasound in measuring the volume of thyroid model.Methods:Forty thyroid models were established using porcine liver, and the Archimedes procedure was set as gold standard in the measurement of the volume of each model. The accuracy of measurement of the porcine thyroid model volume between two-dimensional ultrasound and magnetic induction Freehand-3D ultrasound were compared.Results:There were no significant differences in the accuracy of measurements of thyroid model volume among two-dimensional ultrasound, magnetic induction Freehand-3D ultrasound and Archimedes procedure (all P>0.05). Compared with the Archimedes procedure, magnetic induction Freehand-3D ultrasonic method showed higher correlation coefficient of the measurement of thyroid model volume ( r=0.998). Bland-Altman analysis showed the lower measure error with a relative error of 3.42% and range of -9.57% to 12.07%. And the limits of agreement were (-1.253, 0.999) in the magnetic induction Freehand-3D ultrasonic measurement. Conclusions:Compared with two-dimensional ultrasound, the magnetic induction Freehand-3D ultrasound show higher accuracy in the measurement of the volume of the thyroid model.

Objective To analyze the characteristic of Yunnan unexpected sudden death (YUSD) cases by pathological diagnosis of arrhythmogenic right ventricular cardiomyopathy (ARVC),in order to offer clue for ARVC etiologic research of YUSD.Methods The pathological diagnosis results of 9 cases of sudden death of ARVC in Yunnan,as well as epidemiological investigation data,were used to comprehensively analyze the pathological features of the pathological diagnosis of ARVC in Yunnan.Results The 9 cases including 8 females and 1 male,aged 16-47 years.The sudden death time was from June to August,mainly distributed in 8 families from the disease seriously ridden 7 villages.Three of them had a genetic history of family YUSD,2 cases had a history of mental stimulation,1 case had eaten Trogia venenata;and acute symptoms and signs were palpitation,chest tightness,shortness of breath,and loss of consciousness.Pathological observations were the typical ARVC change,mainly right ventricular lesions,with different degrees of cardiac enlargement and extensive adipose tissue infiltration in the ventricular wall.Among them,6 cases of fat infiltration almost reached the full thickness of the heart wall.In addition to the pathological changes of ARVC,8 cases were accompanied by one or several pathological changes in myocarditis,cardiac dysplasia,nephropathy,pulmonary edema,pneumonia and pancreatitis.Of the 9 cases,5 cases were diagnosed with ARVC,2 cases with ARVC and pulmonary edema,1 case with ARVC and acute hemorrhagic necrotizing pancreatitis,and 1 case with ARVC and Trogia venenata poisoning.The clinical examination abnormalities of the family members of the cases mainly showed arrhythmogenic electrocardiography changes and abnormal myocardial enzymes.Conclusions The nine cases have showed typical epidemiology characteristics of YUSD,and cardiachistological changes are consistent with the ARVC pathological diagnostic criteria.A part of YUSD cases may be caused by ARVC,and the inference will be proved by cadaveric pathologic examination and related pathogenic gene detection.

PURPOSE: Four polymorphisms, -765G>C, -1195G>A, 8473T>C, and Val511Ala, in the cyclooxygenase-2 (COX-2) gene were identified to be associated with colorectal cancer (CRC) risk. However, the results are inconsistent. The objective of this meta-analysis was to evaluate the association between these four polymorphisms and the risk of CRC. MATERIALS AND METHODS: All eligible case-control studies published up to December 2012 on the association between the four polymorphisms of COX-2 and CRC risk were identified by searching PubMed and Web of Science. The CRC risk associated with the four polymorphisms of the COX-2 gene was estimated for each study by odds ratio (OR) together with its 95 % confidence interval (CI), respectively. RESULTS: A total of 15 case-control studies were included. Overall, no evidence has indicated that the -1195A allele, -765C allele, 8473C allele, and 511Ala allele are associated with susceptibility to CRC (-1195G>A: OR=1.11, 95 % CI: 0.82-1.51, p=0.78; -765G>C: OR=1.08, 95 % CI: 0.96-1.21, p=0.07; 8473T>C: OR=1.03, 95 % CI: 0.89-1.18, p=0.91; Val511Ala: OR=0.71, 95 % CI: 0.46-1.09, p=0.94). However, stratified analysis with ethnicity indicated that individuals with -765GC or GC/CC genotypes had an increased risk of CRC among Asian populations (GC vs. GG: OR=1.05, 95 % CI: 0.87-1.28, p=0.03; GC+CC vs. GG: OR=1.08, 95 % CI: 0.96-1.21, p=0.07). CONCLUSION: This meta-analysis indicated that -765G>C polymorphism was significantly associated with susceptibility to CRC in Asian populations.
Asian Continental Ancestry Group ; Case-Control Studies ; Colorectal Neoplasms/*genetics ; Cyclooxygenase 2/*genetics ; Genetic Predisposition to Disease/genetics ; Humans ; Polymorphism, Genetic/*genetics

Objective To study the desmosomal protein plakophilin-2(PKP2)gene mutation of arrhythmogenic right ventricular cardiomyopathy (ARVC) in different populations of Yunnan unexplained sudden death (YUSD) areas,and explore the relationship between PKP2 gene mutation and YUSD.Methods Heart blood samples of YUSD cases (n =7) and venous blood samples of YUSD immediate family (n =30) and other family (n =11) members were collected.Basic situation and genetic relationship of YUSD immediate family and other family were investigated,and electrocardiography (ECG) was examined.DNA from blood samples was extracted and 15 exons of PKP2 gene were sequenced to analyze the mutation of PKP2 gene in different populations.Results A total of 10 people carried 11 PKP2 gene mutation sites with a mutation rate of 20.83％ (10/48).Two mutation sites were novel (p.G247R,p.T298N),and the new mutation sites were carried by two YUSD cases.Eight missense mutations were heterozygous mutations,two of the three synonymous mutations were heterozygous mutations,and one was homozygous synonymous mutation.The mutation sites were significantly concentrated in 4 exons,which were No.1 097 base of exon 4,No.819 and 893 bases of exon 3.2,No.739 base of exon 3.1,and No.156 base of exon 1.One YUSD case of ARVC pathological change carried exon 3.1 (p.G247R) and exon 4 (p.L366P) compound heterozygous mutations,the other YUSD case carried exon 3.2 (p.T298N) heterozygous mutation.The YUSD cases and immediate family with PKP2 gene mutations showed obvious family genetic relationships,and they were all first-degree and second-degree relatives.The abnormal ECGs of YUSD immediate family and other family mainly were conduction block,arrhythmia and premature beat.Conclusion There is a high PKP2 gene mutation rate in different populations of YUSD areas,and there may be a certain etiological connection between PKP2 gene mutations and YUSD.

Objective:To explore the relationship between arrhythmogenic right ventricular cardiomyopathy (ARVC) desmosomal protein gene mutations and Yunnan unexplained sudden death (hereinafter referred to as Yunnan sudden death) by detecting 5 common ARVC desmosomal protein gene mutations of Yunnan sudden death cases and their relatives in Heqing County, Yunnan Province.Methods:In January 2021, the autopsy heart cavity blood was collected from Yunnan sudden death cases in 8 villages in Heqing County, and peripheral venous blood samples of relatives of the cases were collected. Blood samples' DNA was extracted, after PCR amplification, 97 exons of 5 desmosomal protein genes [desmoplakin (DSP), desmoglein-2 (DSG2), plakophilin-2 (PKP2), junction plakoglobin (JUP) and desmocollin-2 (DSC2)] were sequenced by Sanger method to analyze gene mutations.Results:Three blood samples of Yunnan sudden death cases and 36 blood samples of relatives were collected. A total of 26 gene mutation sites were detected in 39 blood samples, with a total mutation rate of 26.80% (26/97). There were 13, 5, 3, 3 and 2 mutation sites in DSP, DSG2, PKP2, JUP and DSC2 genes, respectively. Among them, 19 were reported mutations and 7 were new mutations: DSP gene exon 3 c.372G>A, exon 15 c.2090A>G, exon 17 c.2371C>A, exon 24-I c.8458T>G; DSG2 gene exon 8 c.861C>T; PKP2 gene exon 3 c.892C>A, exon 8 c.1725G>T. Three Yunnan sudden death cases and 36 relatives were all carriers of compound gene mutation, and the same person carried 3 - 9 gene mutation sites at the same time.Conclusion:Mutations of ARVC desmosomal protein genes DSP, DSG2, PKP2, JUP and DSC2 exist in Yunnan sudden death cases and their relatives, which may be the genetic background factors of some Yunnan sudden death.

Objective:To explore the cause of death of 2 suspected Yunnan sudden unexplained death (YNSUD) cases in Dayao County, Yunnan Province.Methods:The field epidemiological investigation and autopsy of 2 cases of YNSUD in Dayao County from June 15 to 20, 2020 were conducted; and blood and tissue samples were collected for qualitative analysis of common poisons and drugs.Results:The areas where the two cases were located were all seriously ill villages with a history of YNSUD, and the time of death occurred in the onset season of YNSUD. There was no blood relationship between the 2 cases, no obvious abnormal symptoms before death, no special diet, no history of exposure to pesticides and other toxic chemicals, and the test results of common poisons were all negative. Autopsy pathological examination results showed that case 1 died of acute cardiac dysfunction caused by sudden acute myocardial infarction of coronary heart disease, and case 2 died of central respiratory and circulatory failure caused by spontaneous subarachnoid hemorrhage.Conclusions:The two cases are excluded from YNSUD through autopsy, and the cause of death is determined. It is suggested that emergency response should be taken as soon as possible for YNSUD cases, and autopsy should be actively carried out to clarify the cause of death from a pathological point of view.

Objective:To investigate the mutation of desmosomal protein gene of arrhythmogenic right ventricular cardiomyopathy (ARVC) in people from Yunnan unexplained sudden death (YUSD) area in Xiangyun County, Dali Prefecture, Yunnan Province, and to explore the etiological relationship between the mutation of ARVC desmosomal protein gene and YUSD.Methods:The autopsy cardiac blood sample of YUSD case ( n = 1) and the peripheral venous blood samples of the same time case ( n = 1) and relatives of YUSD case ( n = 16) were collected in Xiangyun County. Blood DNA was extracted for PCR amplification and sequencing of a total of 97 exons of the ARVC desmosomal protein genes [plakophilin 2 (PKP2), junction plakoglobin (JUP), desmoplakin (DSP), desmoglein 2 (DSG2) and desmocollin 2 (DSC2)] were conducted by Sanger method. At the same time, basic information and genetic family of YUSD case, the same time case and relatives of YUSD case were investigated, and gene mutations were comprehensively analyzed. Results:The YUSD case and the same time case carried JUP, DSP and DSG2 gene mutations. Among the relatives of YUSD case, 2, 14, 16, 15 and 4 cases had mutations in PKP2, JUP, DSP, DSG2 and DSC2 genes, respectively. The YUSD case, the same time case and the relatives of YUSD case carried 6 identical mutation sites: JUP gene exon 3 c.213 T>C synonymous mutation, exon 14 c.2089 A>T missense mutation; DSP gene exon 19 c.2631 G>A synonymous mutation, exon 24 c.8472 G>C synonymous mutation; DSG2 gene exon 8 c.861 C>T synonymous mutation, and exon 15 c.3321 T>C synonymous mutation.Conclusion:In Xiangyun County, six identical mutation sites (JUP gene c.213 T>C and c.2089 A>T, DSP gene c.2631 G>A and c.8472 G>C, DSG2 gene c.861 C>T and c.3321 T>C) carried by YUSD case, the same time case and the relatives of YUSD case may be related to the incidence of some YUSD cases.

Objective:To retrospectively analyze the clinical characteristics of patients with coronavirus disease 2019 (COVID-19) accompanied with diarrhea.Methods:From January 11 to February 6 in 2020, the clinical data of 663 patients diagnosed with COVID-19 admitted to Renmin Hospital of Wuhan University were collected and divided into diarrhea group and non-diarrhea group according to whether they had diarrhea or not. The differences in baseline characteristics, basic disease history, clinical manifestations, chest computed tomography (CT), laboratory findings, disease severity and mortality between the two groups were compared. Chi-square test and Fisher exact test were used for statistical analysis.Results:Among 663 COVID-19 patients, 70 (10.6%) patients accompanied with diarrhea. The proportion of fatigue and increased lactate dehydrogenase (LDH) levels of diarrhea group were higher than those of non-diarrhea group (58.6%, 41/70 vs. 28.2%, 167/593; and 64.2%, 43/67 vs. 50.4%, 277/550), and the differences were statistically significant ( χ2=26.891 and 4.566, both P<0.05). There was no statistically significant difference in the proportion of pneumonia in chest CT between diarrhea group and non-diarrhea group (100.0%, 62/62 vs. 99.4%, 529/532) ( P>0.05). There were no statistically significant differences in the proportions of mild and normal type, severe type and critical type between diarrhea group and non-diarrhea group (35.7%, 25/70 vs. 38.6%, 229/593; 50.0%, 35/70 vs. 47.2%, 280/593; and 14.3%, 10/70 vs. 14.2%, 84/593, respectively) (all P>0.05). There were no statistically significant differences in the mortality of mild and normal type, severe type and critical type between diarrhea group and non-diarrhea group (0 vs. 0.5%, 3/593; 0 vs. 0 and 1.4%, 1/70 vs. 3.5%, 21/593) (all P>0.05). Conclusions:Patients with COVID-19 accompanied with diarrhea are more likely to have fatigue and increased LDH level. Diarrhea is not significantly correlated with the disease severity of patients with COVID-19.

Objective:To expound the pathogenesis relationship between Yunnan unexplained sudden death (YUSD) and desmosomal protein gene mutations of arrhythmogenic right ventricular cardiomyopathy (ARVC).Methods:Four YUSD cases families by ARVC pathological diagnosis were selected, to collect heart blood samples of YUSD cases by ARVC pathological diagnosis( n=3), venous blood samples of immediate relatives with genetic relationship (case relatives, n=4) and control population without genetic relationship ( n=7). DNA was extracted for PCR amplification and sequencing of a total of 97 exons of the ARVC desmosomal protein genes plakophilin 2 (PKP2), desmoplakin (DSP), desmoglein 2 (DSG2), desmocollin 2 (DSC2), and junction plakoglobin (JUP), and the mutations of the 5 genes were analyzed in combination with the genetic family. Results:DSP gene mutations were found in all YUSD cases by ARVC pathological diagnosis and case relatives, and PKP2, DSG2, DSC2 and JUP genes mutations were found in 1 person each. The same person carried 1-3 genes mutations. DSP gene existed 4 exon mutation sites, and 1 of which was a newly discovered heterozygous synonymous mutation c.4014 C>A (p.A1338A). PKP2 gene existed 2 exon missense mutation sites in 1 YUSD case by ARVC pathological diagnosis, and 1 of which was a newly discovered heterozygous mutation c.739 G>C (p.G247R). One heterozygous missense mutation site c.799 G>A (p.A267T) of JUP gene was newly discovered, and the predictive value of protein function was 0.963, the possibility of abnormal changes in protein function was high. DSG2 and DSC2 genes each had one mutation site. However, no mutation was found in control population.Conclusions:Both YUSD cases by ARVC pathological diagnosis and case relatives carry ARVC desmosomal protein genes DSP, PKP2, DSG2, DSC2 and JUP mutations. There may be a certain pathogenesis relationship between YUSD and ARVC desmosomal protein gene mutations.