OBJECTIVETo formulate recommendations in the evaluation of results of genetic analyses in paternity testing under considering mutations.

METHODSA total of 15 short tandem repeat(STR) loci were employed for this study, which were included CSF1PO, FGA, TH01, TPOX, VWA, D3S1358, D5S818, D7S820, D8S1179, D13S317, D16S539, D18S51, D21S11, PentaD and PentaE. Both 100 cases of true trio and 100 cases of false trio were investigated.

RESULTSThe numbers of mismatch alleles in different STR loci were observed in 100 cases of false trio. The different distributions of paternity index were obtained, including the changes of paternity index in each case of true trio under simulated mutations.

CONCLUSIONIn order to avoid the effect of mutations, the exclusion of paternity was never considered on the basis of a single locus. The threshold values of the combined probability of exclusion and the paternity index were important for both exclusion and inclusion of paternity. The scientific evidence for paternity testing can be obtained when both the combined probability of exclusion and the paternity index meet the threshold values. However, when either the combined probability of exclusion or the paternity index can not meet the threshold values, more genetic markers should be added.

Female ; Forensic Genetics ; methods ; Humans ; Male ; Microsatellite Repeats ; genetics ; Mutation ; Nuclear Family ; Paternity ; Reproducibility of Results

OBJECTIVETo study correlation of brain hypoxia of different degrees with brain function and damage.

METHODSThe brain regional oxygen saturation (rSO2) was determined by using a non-invasive near infrared spectroscopy (NIRS) technique in 15 piglets; the piglets were subjected to inhale 3% - 11% oxygen-nitrogen mixed gas through mechanical ventilation for 30 min. The piglets were divided into groups according to the level of brain rSO2 (i.e. < 30%, 30% - 35%, 35% - 40%, and 40% - 50%), and the data were compared with those of the control group (rSO2 > 60%). Changes of brain function were detected through amplitude and frequency of EEG waves and signal complexity. The piglets were sacrificed via decapitation 72 h after brain damage, and then histopathological and ultrastructural examinations were performed on cerebral cortex and hippocampal CA1 area.

RESULTSIn the group with rSO2 > 40%, the mean arterial pressure (MAP) after hypoxia was (56 +/- 0.00) mm Hg (1 mm Hg = 0.133 kPa), the blood lactic acid (LA) was (2.3 +/- 1.2) mmol/L, the EEG findings were within normal range, and there was no change in brain tissue ultrastructure. In the group with brain rSO2 = 30% approximately 40%, the MAP was (73 +/- 8) mm Hg, the LA was (8.2 +/- 3.9) mmol/L, the EEG waves showed decreased amplitude, frequency and complexity, but restored to some extent after hypoxia. The brain tissue ultrastructure showed damages to the cerebral cortex and neuron mitochondria at hippocampal CA1 area. In the group with brain rSO2 < 30%, the MAP was (35 +/- 0) mm Hg, the LA was (12 +/- 2) mmol/L, the EEG showed decreased amplitude, frequency, and complexity of signals compared with those of the normal control group, and was difficult to restore after hypoxia in some of the piglets; the brain tissue ultrastructure appeared to be similar to the changes seen with high-degree swollen cerebral cortex and neuron mitochondria at hippocampal CA1 area.

CONCLUSIONDifferent degrees of hypoxia had different influence on brain function and brain damage. The lower the brain rSO2, the more severe the damages to the brain and its function. The rSO2 of brain tissues detected with noninvasive NIRS can reflect brain injury and its severity during cerebral anoxia.

Animals ; Blood Gas Analysis ; Brain Injuries ; complications ; Cerebral Cortex ; physiopathology ; Cerebrovascular Circulation ; physiology ; Electroencephalography ; Female ; Hypoxia ; metabolism ; pathology ; Hypoxia, Brain ; complications ; Hypoxia-Ischemia, Brain ; physiopathology ; Male ; Neurons ; pathology ; Oximetry ; instrumentation ; Oxygen ; metabolism ; Oxygen Consumption ; Spectroscopy, Near-Infrared ; methods ; Statistics as Topic ; Swine

OBJECTIVETo study the genotype and gene characterization of measles wild viruses circulated in Jilin provinces, and to provide scientific evidences for setting down controlling and preventing strategy and measures.

METHODS38 strains of measles virus isolated in 2001-2006 were genotyped by RT-PCR-RFLP, some strains of measles virus in Jilin province were chosen for the phylogenetic analysis and for the homology analysis of nucleotide and amino acid sequences.

RESULTSAll the 38 strains of measles virus were identified as H1 genotype by RT-PCR-RFLP, and 29 strains of them were identified further as H1 a by sequence analysis. The homology of nucleotide was 88.0%-89.4% and the homology of amino acid was 91.8%-92.7% .The average diversity was less than 1.4%.

CONCLUSIONThe measles virus of H1a genotype was the circulating virus within recent years in Jilin province. There were the same measles virus strains circulating and transmitting at different years and also the different H1a measles virus strains co-circulating at the same year. There were the same transmission chain caused by the same measles virus with other provinces.

China ; epidemiology ; Genotype ; Humans ; Measles ; epidemiology ; prevention & control ; virology ; Measles virus ; classification ; genetics ; isolation & purification ; Molecular Epidemiology ; Phylogeny ; Reverse Transcriptase Polymerase Chain Reaction ; methods

OBJECTIVEA new simple RT-LAMP method was applied to detect measles virus nucleic acid and compared with nest-RT-PCR.

METHODSCompare the detection rate of the RT-LAMP method with that of nest-RT-PCR by detecting measles virus nucleic acid from measles virus and clinical samples.

RESULTSThe nucleic acid positive rates of all 23 strains of measles virus are all 100% by the two methods. But to the detection of 18 clinical samples which are negative in measles isolation, the nest-RT-LAMP showed 56.52% positive rate of nucleic acid of measles virus and nest-RT-PCR showed 47.83%.

CONCLUSIONRT-LAMP is more sensitive than nest-RT-PCR.

Genome, Viral ; Humans ; Measles ; virology ; Measles virus ; isolation & purification ; Reverse Transcriptase Polymerase Chain Reaction ; methods

OBJECTIVETo evaluate the forensic utility of Y-single nucleotide polymorphisms (SNPs) markers.

METHODSAllele-specific PCR, restriction enzyme digestion or direct PCR were performed to examine 10 different SNP loci on Y chromosome, namely M9, M15, M45, M89, M95, M122, M134, M145, M173 and P25 in 161 Chinese Han males.

RESULTSA total of 8 of the 10 SNPs are reported to be polymorphic in Chinese. The gene diversity for the loci showing polymorphism ranged from 0.988/0.012-0.752/0.248, with a power of discrimination 0.094-0.373. Loci M122 and M134 were the most polymorphic markers in Chinese Hans. Nine different haplogroups with frequencies from 1.2% to 51.6% were observed and 3 of the haplogroups-K*(x O2a, O3, P), O3*(x O3e) and O3e were found in 75.2% of Chinese Hans.

CONCLUSIONA comprehensive gene diversity data of Y chromosome and haplogroups were obtained in Sichuan Han population, which will be served as the base for using these Y-SNP markers in forensic medicine and individual identification in Sichuan Hans.

China ; Chromosomes, Human, Y ; genetics ; Female ; Haplotypes ; genetics ; Humans ; Male ; Polymerase Chain Reaction ; Polymorphism, Genetic ; genetics

Objective To establish a discriminant model and to provide a relatively accurate scientific basis for the early diagnosis of tuberculosis (TB) and detection of the close contacts. Methods Through logistic regression analysis, key factors were selected according to Bayes theory and key factors of TB incidence of the close contacts were screened as well as a discriminant model was established. Results The non-TB incidence discriminant function of the close contacts was described as: Y1= -39.831 (constant) + 1.927 X, (sputum-frequency) + 3.528 X2 (education) + 0.309 X3 (contact time) + 5.893 X4 (evade) + 2.140 X5 (ventilation) + 8.706 X6 (cough) + 30.970 X7 (fever). The discriminant function of non-TB incidence of the close contacts was as: Y2 =-57.875 (constant) + 2.343 X1 (sputum-frequency) + 3.965 X2 (education) + 0.361 X3 (contact time) + 6.296 X4 (evade) + 1.348 X5 (ventilation) + 12.984 X6 (cough) + 36.555 X7 (fever). Conduslon The diseriminant model night be used to contribute to the early diagnosis, early intervention and timely treatment on those close contacts of tuberculosis cases.

OBJECTIVETo explore the risk factors on relapsing tuberculosis related to smear positive pulmonary tuberculosis which had been cured for five years.

METHODSPatients with smear positive pulmonary tuberculosis registered in 1995 from ten countries in Hubei province were studied and logistic regression was used for data analysis.

RESULTSThe 5-year relapse rate of smear positive pulmonary tuberculosis was 3.85 percent. Risk factors related to relapse would include being non-modeled county, negative smear after treated for three months, the class of retreatment, management of non-DOTS, method of chemotherapy and patients that did not get treated by the tuberculosis institute, with odds ratios of 0.15, 4.62, 3.68, 5.88 and 6.47, respectively.

CONCLUSIONEffect standard, regulation DOTS and the centralized management measure might have had effects on decreasing the relapse rate.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Antitubercular Agents ; administration & dosage ; adverse effects ; therapeutic use ; Child ; China ; epidemiology ; Contact Tracing ; Directly Observed Therapy ; Female ; Humans ; Logistic Models ; Male ; Middle Aged ; Mycobacterium tuberculosis ; isolation & purification ; Odds Ratio ; Recurrence ; Risk Factors ; Sputum ; microbiology ; Tuberculosis, Pulmonary ; drug therapy ; microbiology

OBJECTIVES: To study the survival rate and the incidence of complications of very preterm infants and the factors influencing the survival rate and the incidence of complications. METHODS: The medical data of the very preterm infants with a gestational age of <32 weeks and who were admitted to the Department of Neonatology in 11 hospitals of Jiangsu Province in China from January 2018 to December 2019 were retrospectively reviewed. Their survival rate and the incidence of serious complications were analyzed. A multivariate logistic regression analysis was used to evaluate the risk factors for death and serious complications in very preterm infants. RESULTS: A total of 2 339 very preterm infants were enrolled, among whom 2 010 (85.93%) survived and 1 507 (64.43%) survived without serious complications. The groups with a gestational age of 22-25 CONCLUSIONS The survival rate is closely associated with gestational age in very preterm infants. A low 1-minute Apgar score (≤3) may increase the risk of death in very preterm infants, while high gestational age, high birth weight, and prenatal use of glucocorticoids are associated with the reduced risk of death. A low 5-minute Apgar score (≤3) and maternal chorioamnionitis may increase the risk of serious complications in these infants, while high gestational age and high birth weight may reduce the risk of serious complications.
Female ; Gestational Age ; Humans ; Infant, Newborn ; Infant, Premature ; Infant, Premature, Diseases ; Infant, Very Low Birth Weight ; Pregnancy ; Retrospective Studies ; Survival Rate

Hypertension is a risk factor for a variety of cardiovascular diseases, which is an important public health problem in the world today. MiRNAs are a class of highly conserved non-coding small RNAs. In recent years, studies have found that miRNAs are involved in the occurrence and development of hypertension through a variety of ways, causing damage to the important target organs of hypertension, such as heart, brain and kidney. This article reviews the research progress of miRNA in hypertension in recent years, in order to clarify its role in the process of hypertension and target organ damage, and provide ideas for exploring new therapeutic targets of hypertension.

Objective:Compare the effects of 3 administration methods (tracheal perfusion, tail vein injection and aerosol inhalation) with bleomycin (BLM) in inducing pulmonary fibrosis in rats, in order to find out the optimal administration methods. Method:Eighty sprague-dawley (SD) male rats with SPF were randomly divided into aerosol inhalation blank group, single tracheal perfusion group(10 mg·kg^-1), multiple tracheal perfusion group(5 mg·kg^-1), single intravenous injection group(150 mg·kg^-1), multiple intravenous injection group(50 mg·kg^-1), single aerosol inhalation group (30 min)and multiple aerosol inhalation group(30 min). The mortality and body weight of rats in each group were observed at 7 d, 14 d and 28 d after the administration. And 28 days later after the administration, the lung coefficients of rats in each group were observed, paraffin sections were prepared, hematoxylin-eosin staining (HE) and Masson staining were performed, and the contents of hydroxyproline (HYP) and plasminogen activator inhibitor-1 (PAI-1) in lung tissues were detected by enzyme-linked immunosorbent assay (ELISA), so as to evaluate the alveoli inflammation and pulmonary fibrosis of rats in each group. Result:Compared with the aerosol inhalation blank group, the rats in the trachea perfusion group had the highest mortality among the drug treatment groups. The pulmonary coefficients of rats in the multiple intravenous injection group and the multiple inhalation group were significantly higher than those in the blank group(P<0.05,P<0.01). The multiple inhalation group was higher than the other model group and the single atomization model group. The results of HE and Masson staining showed thickening of pulmonary septum and higher degree of pulmonary interstitial fibrosis in tracheal perfusion group, intravenous injection group and multiple inhalation group. The degree of pulmonary fibrosis in the multiple inhalation group was more obvious than that in other groups. The results of ELISA showed that the levels of HYP and PAI-1 in lung tissues of rats in aerosol inhalation group and tracheal perfusion group were significantly higher than those in control group(P<0.05). The multiple inhalation group and the single atomization inhalation group were significantly higher than other modules. Conclusion:Bleomycin was inhaled repeatedly to establish pulmonary fibrosis model. The pathological injury and physiological indexes of the model rats were relatively stable, which conforms with the evolution process of pulmonary fibrosis.