Preparation and Quality Evaluation of Gastric Floating Tablets of Schisandra chinensis Total Lignans / 中国药房

OBJECTIVE：To study the prepar ation technology of gastric floating tablets of Schisandra chinensis total lignans （SCTL），and evaluate the quality of prepared tablets. METHODS ：Based on single factor test ，the orthogonal experiment was conducted to optimize the formulation of SCTL gastric floating tablets with the contents of hydroxypropylmethylcellulose （HPMC） K15M，NaHCO3 and microcrystalline cellulose as the factors ，using starting time ，holding time and cumulative release rate of gastric floating tablets as evaluation indexes. The properties ，weight difference ，floatability and accumulative release rate of the prepared SCTL gastric floating tablets were determined. The gastric floating tablets were qualitatively identified by TLC ，and the contents of schisandrin A and total lignans were determined by HPLC and UV spectrophotometry. RESULTS ：The optimal formulation of SCTL gastric floating tablets was made up of 23％ SCTL extract ，20％ HPMC K 15M，40％ microcrystalline cellulose，15％ sodium bicarbonate ，1％ octadecyl alcohol and 1％ polyvinylpyrrolidone. The results of detection of this preparation were in line with the related provisions of “0101 tablet”stated in 2015 edition of Chinese Pharmacopoeia （part Ⅳ）. TLC indicated that the chromatogram of the test sample showed the main spots of same color as the corresponding positions of the chromatogram of schizandrol A control ，Schisandra chinensis reference substance and raw material ，while the negative control has no interference. Content determination results shows that the average content of schizandrol A and total lignans in SCTL gastric floating tablets is 3.187，19.617 mg. It was preliminarily formulated that the content limitation of schizandrol A in one tablet should not be less than 2.50 mg，and the content of total lignans （calculated by schizandrol A ）should not be less than 15.50 mg. CONCLUSIONS：The preparation technology of SCTL gastric floating tablets is stable ，feasible and controllable in quality.

Investigation of epidemic characteristics and prevention of mother to child HIV transmission program from 2012 to 2019 in Suzhou, China / 公共卫生与预防医学

Objective The vertical transmission of HIV, from mother to child remains one of the most important challenges all over the world. This study evaluated the implementation and effectiveness of prevention of mother to child HIV transmission program (PMTCT) from 2012 to 2019 in Suzhou. Methods The data used in this study were obtained from the PMTCT program carried out in hospitals and maternal and child health care centers of Suzhou from 2012 to 2019. The basic information of the HIV positive mothers including marital status, gravidity and parity history, educational background, date of HIV diagnosis, transmission route of HIV, information about the sexual partner, last menstrual period, current pregnancy outcome, and neonatal information were collected. The characteristics of the HIV positive mothers from 2012 to 2019 were analyzed. The statistical difference between the groups was evaluated by the χ2-test or Fisher's exact test as appropriate. P<0.05 was considered statistically significant. Results A total of 116 HIV positive women were diagnosed through prenatal examination. Among the 116 pregnant women, 75 gave birth to 76 live neonates. Only one infant was diagnosed HIV infected because of the HIV positive mother didn't take the anti-virus drugs until delivery. Conclusion The HIV prevalence of Suzhou city showed a low-level tendency. It's important to perform early diagnosis and early prevention for HIV positive pregnant women. There are improvements to make in the program implementation in Suzhou city.

Visit-to-visit blood pressure variability is associated with gestational hypertension and pre-eclampsia.

OBJECTIVE: Visit-to-visit blood pressure variability (VVV) was an independent risk factor for cardiovascular events. In pregnant women whose hemodynamic changes are unique, the role of VVV in hypertensive disorders is still obscure. Therefore, we aimed to investigate the association of VVV with gestational hypertension (GH) and pre-eclampsia (PE). METHODS: 14,702 pregnant women were recruited at around 13 weeks of their gestation. VVV during the second, third trimester and the whole pregnancy, were estimated as standard deviation (SD) or coefficient of variation (CV) of systolic blood pressure (SBP) or diastolic blood pressure (DBP). The associations between VVV, GH and PE were assessed by multivariate logistic regression models. RESULTS: 878 and 131 women developed GH and PE, respectively. VVV was significantly higher in GH and PE subjects than normotensive controls, regardless of whichever metric was calculated. In maximally adjusted models, odds ratio (95% confidence interval) of SBP-CV during the whole pregnancy was 1.62 (1.56-1.68) for GH, 1.14 (1.06-1.21) for PE, and 1.51 (1.47-1.56) for either GH or PE. The cooperation of SBP-CV to other risk factors could help in discriminating pregnant women at high risk of GH and PE. CONCLUSIONS: VVV during pregnancy, especially SBP-CV, was independently associated with GH and PE. These results suggested that VVV could provide additional information to identify pregnant women at high risk of GH or PE. Further studies exploring prospective association between VVV, GH and PE are warranted.

Analysis of injury epidemiological characteristics in children aged 0-14 years in Suzhou / 中华疾病控制杂志

Objective To investigate the epidemiologic features of injuries in children aged 0-14 years in Suzhou, so as to provide targeted education and prevention guidance for parents and schools. Methods Complex sampling was used to choose 4 989 children aged 0-14 years in Gusu and Wujiang districts in Suzhou. The primary caregivers filled out an injury occurrence questionnaire to analyze the distributions of injury numbers, occurrence time and locations. Results In the past 12 months, the overall incidence of children injuries was 7.7%, with 95% confidence interval (CI) was 6.9%-8.4%. The incidence tended to decrease with age ( 2=5.06, P=0.025), however, increase with monthly increase ( 2=28.51, P<0.001).Of all types of children injuries, the incidence of fall was highest (65.5%). Head and face injuries were the most common (45.3%). Most of injuries occurred at home (59.5%) and during leisure play (32.2%). 81.3% of the injuries were slight, and 45.4% of the injuries were dealt with infirmaries. 9.7% of the injured children recovered with aesthetics impact. Young children were more likely to experience head fall or burn injuries during leisure play. Young girls were more likely to experience injuries at home. However, older children were more likely to have lower limb injuries during sports and housework. Older boys were more likely to be harmed at school. Conclusions Different age and gender children had different injury epidemiological characteristics. Specific preventive measures should be taken according to their characteristics.

[Advances on the roles of m 6A in tumorigenesis].

Predominantly found in mRNA, m 6A methylation of RNA molecules regulates post-transcriptional gene expression without changing RNA sequence. m 6A methylation alters gene expression by modulating mRNA processing and metabolism, including alternative splicing, translation efficiency, and stability. Current research shows that m 6A methylation is involved in tumorigenesis, highlighting the importance of further study. However, traditional methods are not sensitive enough to detect the full patterns of m 6A methylation in the transcriptome. The development of new technologies, such as single-nucleotide detection combined with next generation sequencing, allows for the quick and accurate prediction and identification of m 6A methylation sites. In this review, we summarize the recent progress of m 6A in tumorigenesis and outline a new direction for both molecular pathology diagnosis and targeted therapy of tumor.

Complete genome sequence analysis of Hantaan virus strain AYW89-15 isolated in Jiangxi, China / 中国人兽共患病学报

We investigated the complete genome characteristic of the Hantaan virus strain AYW89-15 isolated in Jiangxi Province,China.Primers were designed and were used to amplify the complete S,M and L segments by RT-PCR.The PCR product were then cloned and sequenced,the gene sequences were analyzed with DNAStar and MEGA6.0 software.Result showed that the complete gene sequence was 11 848 nucleotides in length,the S,M and L segments were 1 699 nt,3 616 nt and 6 533 nt respectively,encoding 429,1 133 and 2 151 amino acids respectively.The sequence identities between stain AYW89-15 and other Hantaan virus were 79.7％-87.3％ at the nucleotide level and 92.3％-98.4％ at the amino acid level.Phylogenetic analysis of HV showed AYW89-15 belonged to a new HTNV lineage.AYW89-15 was a new subtype of HTNV that exists in Jiangxi Province.

Molecular Identification and Phylogenetic Analyses of Coxsackievirus A24v Causing an Outbreak of Acute Hemorrhagic Conjunctivitis in Jiangxi, China, in 2010 / 病毒学报

To identify the cause of an outbreak of acute hemorrhagic conjunctivitis (AHC) in Jiangxi (China) in 2010, 20 eye conjunctival swabs were first collected from AHC patients. Then, viruses were isola- ted and tested for human enterovirus 70, coxsackievirus A24 variant (CV-A24v) and adenovirus using the polymerase chain reaction. All CV-A24v isolates underwent sequencing of 3C and VP1 coding regions. Then, a phylogenetic tree was constructed for Jiangxi CV-A24v and worldwide CV-A24v based on,3C and VP1 regions, respectively. Ten out of 20 specimens were positive for CV-A24v, implying that the outbreak was caused by CV-A24v. The phylogenetic tree based on the 3C region showed that Jiangxi CV- A24v belonged to cluster 5 in genotype IV (GIV-C5) with strains isolated throughout the world after 2010, and were divided further into A and B lineages. Phylogenetic analyses of the VP1 region showed that all of the worldwide CV-A24v strains isolated after 2000 could be divided into five groups (1-5). Jiangxi CV-A24v was classified into group 5 and also divided further into A and B lineages upon analyses of the 3C region. These data suggested that CV-A24v causing AHC outbreaks in China in 2010 belonged to GIV-C3 and GIV-C5. At least two transmission lineages were circulated in Jiangxi in 2010. The classification of CV-A24v isolated after 2010 worldwide using the phylogenetic tree based on the VP1 region was almost consistent with that based on the 3C region and also had significant chronological clustering.