Tampon tamponade combined with wedge resection of the nail folds for the treatment of ingrown toenail-induced paronychia: a clinical observation / 中华皮肤科杂志

Objective:To evaluate clinical effect of tampon tamponade combined with wedge resection of the nail folds in the treatment of ingrown toenail-induced paronychia.Methods:A total of 96 patients with ingrown toenail-induced paronychia were collected from Department of Emergency Medicine, General Hospital of Ningxia Medical University between August 2017 and April 2019, and randomly and equally divided into 2 groups by using a random number table: control group treated surgically with the Winograd method, and treatment group treated with tampon tamponade combined with wedge resection of the nail folds. All the patients were followed up for 6 - 23 months after surgery.Results:Six months after operation, 47 (97.92%) and 41 (85.42%) cases were cured in the treatment group and control group respectively, and the cure rate significantly differed between the 2 groups ( χ2 = 4.909, P < 0.05) . The visual analogue scale scores for pain were significantly lower in the treatment group than in the control group on day 3 and 1 month after operation (both P < 0.05) . The postoperative recurrence rate and infection rate were 0 and 2.08% in the treatment group respectively, which were significantly lower than those in the control group (6.25%, 12.5%, respectively, both P < 0.05) . Conclusion:Tampon tamponade combined with wedge resection of the nail folds is effective for the treatment of ingrown toenail-induced paronychia with a simple operative procedure and a low postoperative recurrence rate, and is worthy of clinical promotion.

Application of copy number variation sequencing combined with short tandem repeat in analysis of abortion and prenatal diagnosis / 中华医学遗传学杂志

OBJECTIVE@#To explore the cause of abortion and strategy of prenatal diagnosis for pregnant women with high risk for chromosomal abnormalities by using copy number variation sequencing (CNV-seq) and short tandem repeats (STR) analysis.@*METHODS@#A total of 36 samples were collected, including amniotic fluid, abortion tissue, whole blood, chorionic villi and umbilical cord blood. CNV-seq and STR analysis were carried out to detect microdeletions, microduplications, chromosomal aneuploidies, mosaicisms and triploidies.@*RESULTS@#Among all samples, 1 was detected with 4p15.1p16.3 and 14q11.1q22.1 duplication, 1 was detected with 19p13.3 deletion, 8 were detected with chromosomal aneuploidies, 4 were detected with mosaicisms, two were detected with triploidies. No definite pathogenic CNVs were detected in 20 samples, which yielded a positive detection rate of 44.44%.@*CONCLUSION@#As a high-throughput detection method, CNV-seq has the advantages of rapidity, simplicity and high accuracy. It may suit prenatal diagnosis and analysis of abortion factors in combination with STR analysis.

Air pollution and elementary school students’ absenteeism caused by respiratory symptoms and diseases among primary school students / 中国学校卫生

Objective@#To investigate the health effects of air pollution on elementary school students with the indicator of absenteeism caused by respiratory symptoms and diseases, and to provide a reference for improving their physical health.@*Methods@#Absenteeism, air pollutants, and meteorological data during Sep. 2015 to Jun. 2017 in Pudong, Shanghai were collected. Generalized additive model was used to estimate the effects of air pollution on students’ absenteeism caused by respiratory symptom and diseases, time trends, day of week and meteorological factors were controlled.@*Results@#Totally 47 723 person-days of elementary school students’ absenteeism caused by respiratory symptoms and diseases were recorded during Sep.2015 to Jun. 2016 in Pudong, Shanghai, and the absenteeism rate was 0.07%. The PM2.5 concentration on lag0 and SO2 concentration on lag2 showed the most significant effects, the elementary school students’ absenteeism raised for 1.43% (95%CI=0.25%~2.62%)and 6.79% (95%CI=0.25%~13.32%) respectively with every 10 μg/m3 increment of PM2.5 and SO2.@*Conclusion@#Air pollution in Pudong new area have made a influence on the elementary school student’s respiratory symptoms and absenteeism, and the prevention work of air pollution should be strenghthened.

Expression of CCAAT/enhancer-binding protein in cultured rat hepatic stellate cells and its significance / 中华肝脏病杂志

<p><b>OBJECTIVE</b>The expression of C/EBPalpha protein and mRNA during automatically activation process in primary cultures of HSCs were observed in order to explore its possible association with the proliferation and activation of HSCs.</p><p><b>METHODS</b>Immunocytochemistry, Western blot and RT-PCR were used to evaluated the expression of C/EBPalpha protein and mRNA; as well as the expression of alpha-SMA, Desmin, MMP2, type I procollagen (alpha1). The eukaryotic vector harboring the full length cDNA of C/EBPalpha was transfected into activated HSC, then immunocytochemistry was applied to confirm the transfection and evaluate the effect of transfection on the proliferation of HSC by calculating the PCNA-positive cells. The morphological changes of HSC were observed by use of phase-contrast microscope.</p><p><b>RESULTS</b>Constitutive expression of mRNA and protein of C/EBPalpha were detected in primarily cultured HSCs, and the protein was seen in both nuclei and cytoplasm with the latter being dominant. Their expression levels reached highest at day 2 of the culture, then decreased gradually when continually cultured to the day 4, 7, 10, on the other hand, the expression of alpha-SMA, MMP2 and ColI(alpha1) increased steadily. Transient transfection was verified by the fact that much more and stronger C/EBPalpha stain was observed in transfected HSCs than in void-vector transfected cells. In C/EBPalpha gene transfected HSCs, the number of PCNA-positive cells dramatically decreased compared with the void-vector transfected cells 24h after transfection. In addition, the C/EBPalpha gene transfected HSCs died 36 h after transfection, a few surviving cells became longer and thinner in morphology, however the void-vector transfected cells almost all remained alive.</p><p><b>CONCLUSIONS</b>C/EBPalpha was likely involved in the HSCs activation, and over-expressed C/EBPalpha by transfection had inhibitory influence on the proliferation of cultured rat HSCs.</p>

Effect of RAR-beta transfection on the proliferation and phenotype of rat hepatic stellate cells / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To study the effect of RAR-beta transfection plus treatment with the corresponding ligand ATRA on the proliferation and phenotype of platelet-derived growth factor (PDGF)-activated hepatic stellate cells (HSC).</p><p><b>METHODS</b>PDGF-activated hepatic stellate cells of rats were transfected with eukaryotic expression vector pCMV-script-RAR-beta, which was verified by western blot. The proliferation of transfected HSC was assayed by BrdU incorporation as well as MTT methods. Their phenotype (alpha-SMA and desmin) was observed by immunocytochemistry assay with image analysis and RAR-beta protein expression was detected by western blot.</p><p><b>RESULTS</b>Transfection of RAR-beta gene and treatment with ligand ATRA could increase the expression of RAR-beta protein for at least 144h and inhibit the proliferation and the expression of alpha-SMA and desmin in PDGF-activated HSC. Significant statistical differences were perceived comparing with sham-transfected, only-PDGF treated, non-ligand treated and irrelevant ligand-treated HSC.</p><p><b>CONCLUSIONS</b>Transfected with RAR-beta gene as well as using related ligand ATRA could suppress the proliferation and reverse the activation phenotype of activated HSC.</p>