Obgective To explore the risk factors of preterm infants with bronchopulmonary dysplasia(BPD).Methods A prospective cohort study was conducted to analyze the risk factors of preterm infants with BPD.Preterm infants (gestational age ＜ 32 weeks,and admission within 24 h since birth,and survival time more than 28 d since birth) who were sent to the Ward of Extremely Preterm Infants in Bayi Children's Hospital Affiliated to Clinical Medical College in Beijing Military General Hospital of Southern Medical University were enrolled from November 2013 to May 2014.According to the diagnostic criteria of BPD,the subjects were divided into 2 groups(BPD group and non-BPD group).Factors such as maternal information,neonatal basic information,neonatal diseases and treatments were compared between the 2 groups.Risk factors of preterm infants with BPD were analyzed by using t test,Chi-square test,Fisher's exact probability method and Logistic regression analysis.Results (1) A total of 298 cases were enrolled in this study.Among these infants,180 cases were male and 118 cases were female.The gestational age ranged from 25.6 to 31.9 weeks with the average age of (29.9 ± 1.4) weeks and the birth weights ranged from 740 to 2 300 g with the average weight of (1 428.3 ± 289.0) g.There were 19 cases of extremely low birth weight and 175 cases of very low birth weight.Sixty-nine cases of these infants were diagnosed as BPD (43 cases were mild,10 cases were moderate,16 cases were severe) with incidence of 23.2％.(2)The incidence of BPD was negatively related to gestational age and birth weight:the incidence of BPD in preterm infants with gestational age ＜ 28 weeks,28-30 weeks and ≥ 30-32 weeks were 70.4％,41.9％ and 6.2％;the incidence of BPD in preterm infants with birth weight ＜ 1 000 g,1 000-1 500 g and ≥ 1 500-1 800 g were 78.9％,29.5％ and 8.8％.(3) Multivariate Logistic regression found gestational age (OR =4.52),birth weight (OR =3.38),gender (OR =3.04),cytomegalovirus infection (OR =55.27),duration of invasive ventilation ≥ 7 d (OR =3.22),the highest concentration of inspired oxygen ≥400 mL/L (OR =4.14),patent ductus arteriosus(PDA) in need of surgical ligation (OR =7.30),and transfusion of packed red blood cells within 14 d since birth (OR =3.51) were the independent risk factors of BPD (all P ＜ 0.05).(4) Factors such as birth weight (P =0.015),duration of invasive ventilation (P =0.003),duration of inspired oxygen (P =0.000),and PDA in need of surgical ligation or not(P =0.017) were related to the severity of BPD.Conclusions BPD is a multifactorial disease.Taking effective measures to control risk factors is the key for preventing BPD.

Objective To investigate the influence of diversification continuing care on quality of life and activities of daily living of epilepsy patients secondary to cerebral hemispheric atrophy.Methods Twenty epilepsy patients with cerebral hemispheric atrophy,admitted to Second Department of Neurosurgery of Hebei Provincial People's Hospital from March 2012 to December 2014 were selected by convenience sampling method,and divided into the intervention group (12 cases) and control group (8 cases),Patients in the control group were given routine guidance discharge,and intervention group were given continuing nursing intervention.The influence of diversification continuing care on quality of life and activities of daily living of epilepsy patients were compared between two groups.Results Twelve months after discharge,QOL in the control group and the intervention group scored 58.8±20.9 and 77.2±14.3,t=2.37,P ＜ 0.05.The ADL scored 49.42±8.14 and 62.72±7.06,t=2.39,P ＜0.05.Conclusions Diversification continuing nursing intervention is helpful to improve quality of life and activities of daily living of epilepsy patients secondary to cerebral hemispheric atrophy.

Objective To study on the psychological health and related influencing factors of military nurses who take part in the Tibetan hospital supporting operation.Methods Symptom checklist 90 (SCL-90), coping style questionnaire and personal evaluation questionnaire were employed in the survey of 75 military nurses who took part in the Tibetan hospital supporting operation.Results The scores of Tibetan hospital nurses in high altitude areas were significantly higher than normal person and soldiers in each factors of SCL-90. The correlation analysis showed that the coping factor of problem resolving in coping style had negative relationship with fear factor in SCL-90 (r=-0.231,P<0.01). Remorse factor had positive correlation with all factors of SCL-90 (r=0.301-0.432;P<0.01),while the total score of personal evalation had negatively related to all factors of SCL-90 (r=-0.308--0.423;P<0.01).Conclusions The military nurses who take part in the Tibetan hospital supporting operation are in a poor mental state which is greatly influenced by the coping style and personal evaluation.

Objective:To observe the clinical effect of Traditional Chinese Medicine (TCM) collapsibility combined with pressure therapy in the treatment of eczema.Methods:From January 2021 to August 2021, 60 patients with lower extremity venous ulcers who were treated in Wangjing Hospital, China Academy of Chinese Medical Sciences were selected and randomly divided into the control group (30 patients) and observation group (30 patients). The control group was treated by the routine pressure therapy, and the observation group was by the TCM nursing intervention on the basis of the control group. Both groups were treated for 2 weeks. The visual analogy scale (VAS),chronic Venous Insufficiency Questionnaire (CIVIQ), Self-rating Anxiety Acale (SAS), and Self-rating Depression Scale (SDS) were measured and evaluated at baseline and after treatment.Results:The total response rate was 100.0% (30/30) in the observation group and 86.7% (26/30) in the control group, and the difference was statistically significant ( χ2=4.29, P=0.038). The VAS (2.47±0.68 vs. 2.97±0.14, t=3.95), SAS (40.31±11.93 vs. 55.87±4.53, t=4.73), SDS (44.30±5.38 vs. 47.61±5.33, t=2.39) scores were significantly lower than those in the control group ( P<0.05), CIVIQ score (86.63±2.74 vs. 84.67±3.23, t=2.54) was significantly higher than that of the control group ( P<0.05). Conclusion:TCM combined with pressure therapy can promote the healing of ulcers in patients with eczema, relieve pain, and improve the quality of life of patients.

OBJECTIVE: To explore the molecular basis for an A subtype of the ABO blood group. METHODS: The forward and reverse typing of the ABO blood group were identified by gel card and test tube methods. The ABO gene of the patient was detected by PCR-sequence specific primer (PCR-SSP). Exons 1 to 7 of the ABO gene was amplified by PCR and sequenced. The ABO gene was also subjected to subclone sequencing for haplotype analysis. RESULTS: The patient's red cells showed weak agglutination with anti-A but non-agglutination with anti-B. The patient's serum showed 1+ agglutination with A cells and 4+ agglutination with B cells. Based on above serological characteristics, the patient was defined as Aw subtype of the ABO blood group. Sequencing analysis showed that the patient was heterozygous for c.106G>T, c.188G>A, c.189C>T, c.220C>T, c.297A>G, c.467C>T, c.543G>C, c.646T>A, c.681G>A, c.771C>T, c.829G>A, in addition with a c.261G deletion. Combined with the result of subclone sequencing, the ABO genotype of the patient was determined as ABO*AW.33. new/O.01.02, which harbored c.467C>T and c.543G>C variants compared with ABO*A1.01 and c.543G>C variant compared with ABO*A1.02. The novel allele has been submitted to GenBank with an accession number of MK302122. CONCLUSION A novel allele of Aw33 subtype has been identified with its GTA transferase gene harboring c.467C>T and c.543G>C variants compared with A1.01.
ABO Blood-Group System ; genetics ; Alleles ; Exons ; genetics ; Genotype ; Humans ; Phenotype

Objective: To analyze the epidemiological and molecular characteristics of norovirus outbreaks in schools in Xicheng District of Beijing from 2017 to 2022, so as to provide evidence for the prevention and control of norovirus outbreaks in schools. Methods: Data of norovirus outbreaks in schools in Xicheng District, Beijing during 2017 to 2022 were collected and analyzed by descriptive epidemiological methods. Realtime PCR was used to detect the nucleic acid of group GⅠand GⅡnorovirus, the positive norovirus nucleic acid samples were sent to Beijing Center for Disease Control and Prevention for molecular typing. Results: From 2017 to 2022, 185 norovirus outbreaks were reported in schools in Xicheng District, including 166 cluster outbreaks and 19 outbreaks. A total of 2 044 cases were reported, with a total attack rate of 13.92%. There were two peaks in the outbreak time, which were from March to June after the spring semester and from October to December after autumn semester. Primary schools were the most common place of occurrence (101 cases), followed by nursery institutions (68 cases) and secondary schools (16 cases). There were statistically significant differences in the incidence rates among different sites(12.37%, 22.78%, 8.47%, χ2=263.34, P<0.01). There were significant differences in the incidence of vomiting, diarrhea, nausea and stomachache among different students (χ2=263.33, 90.58, 20.42, 30.29, P<0.01). Vomiting was the main symptom in primary school and nursery school children (96.41%, 98.28%), and the diarrhea rate was higher in middle school students (68.22%). The outbreaks were mainly caused by type GⅡ norovirus. The genotype from 2017 to 2021 showed the characteristics of diversity, mainly GⅡ.2[P16], but there was no significant advantage for the GⅡ.2 [P16] during 2019 to 2021. Conclusions The norovirus outbreak in schools in Xicheng district of Beijing from 2017 to 2022 are mainly caused by GⅡ type genome. The main genotype is GⅡ.2[P16]. Norovirus infection mainly occurred in primary schools and kindergartens. For the vulnerable populations, it is necessary to improve the capacity to early identification, student infectious disease management, active infection control and prevention measures, and pathogen surveillance and sporadic case monitoring.

Objective:To retrospectively analyze the results of prenatal diagnosis for 67 pedigrees affected with Duchenne muscular dystrophy (DMD) from the Central Plain Region of China and explore the optimal diagnostic strategy.Methods:Probands from the 67 pedigrees were subjected to multiplex ligation-dependent probe amplification (MLPA), next-generation sequencing (NGS) and Sanger sequencing to attain the diagnosis. The fetuses were subjected to prenatal diagnosis, and the results were verified with short tandem repeat (STR) analysis.Results:Among the 67 probands, large deletions, duplications and small mutations have accounted for 73.13% (49/67), 10.45% (7/67), and 16.42% (11/67), respectively. A hotspot deletion has involved exons 45 to 52. There were 11 small mutations, among which four were unreported previously. De novo mutations have accounted for 41.80% (28/67), of which 27 were novel large fragment deletions. Prenatal diagnosis was provided to 39 women who have carried the DMD gene mutations, 10 fetuses were identified as male patients and 7 fetuses were female carriers. Among the prenatal diagnosis results of 28 non-carrier pregnancies, one fetus was a male patient with the same mutation site as the proband. Conclusion:For the prenatal diagnosis of DMD, in addition to known pathogenic mutations, deletion of large fragments should also be excluded. Mothers of probands who do not carry the DMD mutation should also undergo prenatal diagnosis to rule out gonadal mosaicism.

Objective:To study the molecular basis for a proband with A subtype B of the ABO blood group and explore the influence of amino acid variant on the activity of glycosyltransferase (GT).Methods:A proband who had presented at the First Affiliated Hospital of Zhengzhou University on July 2, 2020 was selected as the study subject. Serological identification of the ABO blood groups of the proband and her family members were performed by gel card and test tube methods. The ABO gene of the proband was identified by PCR-sequence specific primers (PCR-SSP) and DNA sequencing. A 3D molecular homologous model was constructed to predict the impact of the variant on the stability of α-(1→3)-D-N-acetylgalactosamine transferase (GTA). Results:The red blood cells of the proband, her mother and two younger brothers showed weak agglutination with anti-A and strong agglutination with anti-B. The sera showed 1~2+ agglutination with Ac and no agglutination with Bc. Based on the serological characteristics, the proband was identified as AwB subtype. Pedigree analysis suggested that the variant was inherited from her mother. The blood group of the proband was identified as A223B type by PCR-SSP. ABO gene sequencing analysis showed that the proband has harbored heterozygous variants of c. 297A>G, c. 467C>T, c. 526C>G, c. 657C>T, c. 703G>A, c. 796C>A, c. 803G>C, c. 930G>A and c. 1055insA. Based on the results of clone sequencing, it was speculated that the genotype was ABO* A223/ ABO* B.01. There were c. 467C>T and c. 1055insA variants compared with ABO* A1.01, and c. 1055insA variant compared with ABO* A1.02. Homologous modeling showed that the C-terminal of A223 GT was significantly prolonged, and the local amino acids and hydrogen bond network have changed. Conclusion:Above results revealed the molecular genetics mechanism of A223B subtype. The c. 1055insA variant carried by the proband may affect the enzymatic activity of GTA and ultimately lead to weakening of A antigen.

Objective:To estimate the influence of metabolic parameters in 18F-FDG PET/CT and clinically relevant indicators on the prognosis of patients with cervical cancer. Methods:A total of 174 patients with cervical cancer (age (53.6±11.1) years) who underwent baseline 18F-FDG PET/CT examination in the Affiliated Hospital of Qingdao University from May 2011 to December 2020 were retrospectively collected. Metabolic parameters (metabolic tumor volume of primary lesion (MTV p), total lesion glycolysis of primary lesion (TLG p), MTV sum of total lesions (MTV total) in the whole body, TLG sum of total lesions (TLG total)) and clinical parameters (International Federation of Gynecology and Obstetrics (FIGO) stage, tumor maximum diameter ( Dmax), et al) were collected. Cox regression and Kaplan-Meier method were performed to evaluate the prognostic and predictive values of those parameters. Results:The follow-up time was 6-120 months, during which 52 patients (29.9%, 52/174) developed progression. The 5-year overall survival (OS), progression-free survival (PFS), local control (LC) and distant metastasis-free survival (DMFS) rates were 83.3%(145/174), 70.1%(122/174), 75.3%(131/174) and 82.8%(144/174), respectively. Cox regression showed that FIGO stage and MTV total were independent factors for predicting PFS, OS and LC (hazard ratio ( HR): 1.005-11.605, all P<0.05). FIGO stage and TLG total were independent factors for predicting DMFS ( HR: 1.002-12.258, all P<0.05). Conclusion:MTV total and FIGO stage are effective predictors of patients with cervical squamous cell carcinoma.

Objective:To explore the effects of miRNA-373-3p (miR-373-3p) on the proliferation of nephroblastoma G401 cells through targeted regulation of CD44 expression.Methods:Bioinformatic method was used to predict the possible targeted genes of miR-373-3p based on bioinformatic databases including miRDB, miRanda, PITA and DIANA-microT. G401 cells were taken and transfected with miR-373-3p mimic, mimic negative control, miR-373-3p inhibitor or inhibitor negative control, respectively. Cell proliferation ability was detected by using CCK-8 assay. The number of clones was detected by using clone formation assay. The relative expression level of CD44 mRNA was detected by using real-time fluorescent quantitative polymerase chain reaction (qRT-PCR), and the expression level of CD44 protein was detected by using Western blotting. The dual luciferase gene reporter assay was carried out in HEK-293T cells to vertify the target gene of miR-373-3p.Results:Bioinformatic analysis indicated that CD44 was a targeted gene of miR-373-3p. After 24 h transfection, the proliferation activity of G401 cells in miR-373-3p mimic group was decreased compared with that in mimic negative control group (all P < 0.05). After 48 h transfection, the proliferation activity of tumor cells in miR-373-3p inhibitor group was increased compared with that inhibitor negative control group (all P < 0.05). The formed number of clones in miR-373-3p mimic group was reduced compared with that in the mimic negative control group (55.3±2.5 vs. 90.7±2.9), and the difference was statistically significant ( t = 14.57, P < 0.01). The formed number of clones in miR-373-3p inhibitor group was more than that in inhibitor negative control group (115.0±2.7 vs. 92.0±2.4), and the difference was statistically significant ( t = 8.86, P < 0.01). The dual-luciferase gene reporter assay showed that CD44 was a direct targeted gene of miR-373-3p. The relative expression levels of CD44 mRNA in miR-373-3P mimic and mimic negative control group were 0.62±0.03 and 1.00±0.01, respectively, and the difference was statistically significant ( t = 11.28, P < 0.01). The relative expression levels of CD44 mRNA in miR-373-3p inhibitor and inhibitor negative control group were 1.31±0.02 and 1.00±0.00, respectively, and the difference was statistically significant ( t = 12.65, P < 0.01). The CD44 protein expression was decreased in miR-373-3p mimic group, while increased in miR-373-3p inhibitor group. Conclusion:miR-373-3p can inhibit tumor cell proliferation by targeting CD44 in nephroblastoma.