Gelatin but not type I collagen promotes bacteria phagocytosis in PMA-treated U937 human lymphoma cells.

PURPOSE: Besides comprising scaffolding, extracellular matrix components modulate many biological processes including inflammation and cell differentiation. We previously found precoating cell plates with extracellular matrix collagen I, or its denatured product gelatin, causes aggregation of macrophage-like human lymphoma U937 cells, which are induced to differentiation by phorbol myristate treatment. In the present study, we investigated the influence of gelatin or collagen I precoating on the bacteria phagocytosis in PMA-stimulated U937 cells. MATERIALS AND METHODS: Colony forming units of phagocytosed bacteria, Giemsa-staining of cells with phagocytosed bacteria, confocal microscopic and flow cytometric analysis of cells with phagocytosed FITC-labeled bacteria and non-bioactive latex beats were conducted. RESULTS: Gelatin precoating enhances the phagocytosis of both Gram-negative and positive bacteria, as shown by the increased colony forming units of bacteria phagocytosed by cells, and increased intracellular bacteria observed after Giemsa-staining. But collagen I has no marked influence. Confocal microscopy reveals that both live and dead FITC-bacteria were phagocytosed more in the cells with gelatin-coating but not collagen-coating. Of note, both gelatin and collagen I coating had no influence on the phagocytosis of non-bioactive latex beads. Since gelatin-coating increases autophagy but collagen I has no such impact, we are curious about the role of autophagy. Inhibiting autophagy reduced the phagocytosis of bacteria, in cells with gelatin-coating, while stimulating autophagy enhanced phagocytosis. CONCLUSION: This study finds the bacteria-phagocytosis stimulatory effect of gelatin in PMA-treated U937 cells and reveals the positive regulatory role of autophagy, predicting the potential use of gelatin products in anti-bacterial therapy.

The impact of basketball on the social adjustment of Chinese middle school students: the chain mediating role of interpersonal relationships and self-identity.

Background: This study examines the effects of 12 weeks of basketball on interpersonal relationships, self-identity and social adjustment of middle school students, as well as exploring the mediating role of interpersonal relationships and self-identity in basketball's influence on social adjustment. Methods: A total of 87 students from a middle school in Jiangsu Province, China, were selected to participate in this study. A 12-week basketball intervention experiment was conducted, and questionnaires were administered to measure the study variables. Common method bias test, normality test, ANOVA and Pearson correlation analysis were used to analyze the study variables. The theoretical model of this study was also validated using the Process plug-in developed by Hayes, setting p < 0.05 (two-tail) as statistically significant. Results: After a 12-week basketball intervention experiment, the interpersonal relationships, self-identity and social adjustment of the middle school students in the experimental and control groups showed improvement, with the experimental group showing significantly more significant improvement than the control group. A 12-week basketball intervention can positively impact the social adjustment of middle school students, with interpersonal relationships and self-identity acting as a chain mediator in the impact process.

Observation on the efficacy of vedolizumab in the treatment of patients with active Crohn′s disease / 中华消化杂志

Objective:To preliminary observe the clinical efficacy of vedolizumab (VDZ) in the treatment of active Crohn′s disease (CD).Methods:From March 2021 to October 2022, a total of 22 patients with active CD who received VDZ treatment at Zhongda Hospital, Southeast University were retrospectively enrolled. The general clinical data, laboratory indicators, imaging finding and endoscopic images of the patients were collected. The Crohn′s disease activity index (CDAI), hypersensitive C-reactive protein (hs-CRP), erythrocyte sedimentation rate (ESR), clinical remission rate were evaluated at week 0, 2, 6 and 14 of VDZ administration. Meanwhile, the response rate under endoscopy and remission rate under endoscopy were evaluated after 14 weeks of VDZ administration. The related factors affecting the efficacy of VDZ were further analyzed. Kruskal-Wallis H test and Mann-Whithey U test were used for statistical analysis. The multiple logistic regression analysis was used to find the related factors affecting the clinical remission after VDZ treatment. Results:The CDAI at week 0, 2, 6 and 14 after treatment were 181.01 (160.11, 231.56), 148.05 (134.88, 200.52), 127.46 (91.44, 163.62), and 82.35 (63.50, 121.84), respectively, and the differences were statistically significant ( H=34.23, P<0.001); there were statistically significant differences between week 0 and week 2, 6, 14 after treatment ( U=130.00, 80.00, 33.00; P=0.017, <0.001, and<0.001). The hs-CRP levels were 5.72 mg/L (3.59 mg/L, 11.10 mg/L), 2.86 mg/L (0.86 mg/L, 5.27 mg/L), 1.55 mg/L (0.86 mg/L, 9.89 mg/L) and 2.86 mg/L (0.86 mg/L, 3.12 mg/L), respectively, and the differences were statistically significant ( H=9.69, P=0.021); there were statistically significant differences between week 0 and week 2, 6, 14 after treatment ( U=102.00, 109.00, 98.00; P=0.026, 0.045, and 0.011) .The level of ESR after 14 weeks of VDZ treatment was 8.00 mm/1 h (4.00 mm/1 h, 17.00 mm/1 h), which significantly decreased compared with that before treatment (17.00 mm/1 h(12.25 mm/1 h, 21.75 mm/1 h)), and the difference was statistically significant ( U=132.50, P=0.020). The clinical remission rates at week 2, 6 and 14 after VDZ treatment were 54.5% (12/22), 68.2% (15/22) and 86.4% (21/22), respectively, and the clinical response rates were 18.2% (4/22), 54.5% (12/22) and 95.5% (21/22), respectively. After 14 weeks of VDZ treatment, among 17 patients who underwent endoscopic re-examination, 9 patients achieved response under endoscopy and 3 patients achieved remission under endoscopy. Stenotic type and penetrating type of CD, previous use of glucocorticoids or immunosuppressants were risk factors of no clinical remission after VDZ treatment ( β=-4.586, -5.005 and -3.371; OR=0.010, 0.007 and 0.034; P=0.010, 0.025 and 0.045). While VDZ treatment for 14 weeks was a protective factor ( β=2.475, OR=11.885, P=0.011). Conclusions:VDZ can effectively relieve disease activity in patients with active CD. The disease behavior of CD, previous medication treatment of patients, and the duration of VDZ treatment may be related to the efficacy of VDZ.

Analysis of factors for serious early complications after primary debulking surgery in elderly patients with advanced epithelial ovarian cancer / 中华老年医学杂志

Objective:To investigate the factors for serious complications within 30 days after surgery in elderly patients with advanced epithelial ovarian cancer(EOC)who undertook primary debulking surgery(PDS).Methods:The clinical data of International Federation of Gynecology and Obstetrics(FIGO)stage ⅢC/Ⅳ EOC patients aged≥60 years who received PDS in gynecological department of National Cancer Center and National Center of Gerontology between January 2014 and December 2018 were retrospectively analyzed.Clavien-Dindo scoring system was applied to grade the complications within 30 days after surgery.The serious early postoperative complications were those of grade Ⅲ or above occurred within 30 days after surgery.Multivariate Logistic regression analysis was used to screen the independent risk factors of serious complications within 30 days after surgery.Results:A total of 133 patients were included in this study and serious complications rated 11.3%(15/133). The mean age of patients in severe complication group was significantly higher than that in the control group[(69.80±6.56) vs.(65.87±5.14), t=2.699, P=0.008]. The proportion of patients with preoperative ECOG score≥2 was significantly higher in the severe complication group than that in the control group[26.7%(4/15) vs.5.9%(7/118), χ2=4.985, P=0.026], and the proportion of preoperative hypoalbuminemia(<35 g/L)was significantly higher in the severe complication group[20.0%(3/15) vs.3.4%(4/118), χ2=4.897, P=0.027]. However, there was no significant difference in intraoperative bleeding, R0 resection rate as well as surgical complexity( χ2=1.964, 0.330, 4.637, all P>0.05)between the two groups.Multivariate Logistic regression analysis showed that the independent factors for serious early postoperative complications were age≥70 years( OR=4.345, P=0.028), ECOG score≥2( OR=25.619, P=0.008)and preoperative albumin <35 g/L( OR=6.733, P=0.040). Conclusions:In the elderly ovarian cancer patients, individualized perioperative management should be strengthened for the patients with factors associated with serious early postoperative complications, in order to reduce severe complications and improve the prognosis.

Advances in cardiac involvement in children with Duchenne muscular dystrophy / 国际儿科学杂志

Duchenne muscular dystrophy(DMD)is an X-linked recessive muscular disorder that affects mainly males.With its low incidence, insidious onset, and rapid progression, DMD is characterized by proximal muscle weakness, gastrocnemius hypertrophy, and markedly elevated serum creatine kinase.In addition to severe motor dysfunction, it also causes cardiac involvement in children, mainly manifested as dilated cardiomyopathy and arrhythmias.The mutations of DMD gene lead to the absence of dystrophin, which results in cytoskeletal defects and the impairment of the integrity of myocardial cell membrane.Meanwhile, calcium overload makes the myocytes more susceptible to damage.Exon deletion is the most common type of gene mutations in children with DMD, followed by point mutations, duplications and small insertion or deletion.The relationship among the clinical manifestations, pathogenesis, evaluation of cardiac damage in DMD and its genotype has not been clarified, which still needs further research and exploration, although some advances have been made recently.

Topological data analysis model for the spread of the coronavirus

AO_SCPLOWBSTRACTC_SCPLOWWe apply topological data analysis, specifically the Mapper algorithm, to the U.S. COVID-19 data. The resulting Mapper graphs provide visualizations of the pandemic that are more complete than those supplied by other, more standard methods. They encode a variety of geometric features of the data cloud created from geographic information, time progression, and the number of COVID-19 cases. They reflect the development of the pandemic across all of the U.S. and capture the growth rates as well as the regional prominence of hot-spots. The Mapper graphs allow for easy comparisons across time and space and have the potential of becoming a useful predictive tool for the spread of the coronavirus.

Anatomic study and clinical practice of mesopancreas and total mesopancreatic excision / 中华外科杂志

Objective@#To explore the anatomical characteristics of the mesopancreas, to define the range of the total mesopancreas excision and to evaluate the feasibility, safety and effectiveness in the treatment of pancreatic cancer.@*Methods@#A regional anatomical and pathological study was performed on 14 cadavers with large slices and paraffin sections. The clinical and pathological data of 58 consecutive patients underwent total mesopancreas excision for pancreatic head carcinoma from January 2013 to December 2015 were prospectively collected and analysed. The perioperative morbidity, mortality and clinical outcomes of patients underwent total mesopancreas excision were compared with the patients underwent conventional pancreaticoduodenectomy from January 2010 to December 2012.@*Results@#The mesopancreas located in the retropancreatic area, extending from the head, neck, and uncinated process of pancreas to the aorto-caval groove, in which there were loose areolar tissue, adipose tissue, nerve plexus, lymphatic and capillaries. Although no fibrous sheath or fascia like mesocolorectum was found around the structures, a relatively fixed extent could be defined according to its embryologic and anatomic characters. In clinical practice, total mesopancreas excision was classified into two levels according to the extent of resection in this series: level Ⅰ was a"standard total mesopancreas excision" or"total mesopancreas excision in a narrow sense" , which was similar to the extent of standard resection from consensus statement of ISGPS. Level Ⅱ was defined as any procedure extending the range of level Ⅰ, called the"extended total mesopancreas excision" or"total mesopancreas excision in a broad sense". In TMpE group, the intraoperative blood loss( (461.4±184.5)ml vs. (532.2±319.8)ml, P=0.301), operation time( (368.6±92.5)minutes vs. (397.1±112.7)minutes, P=0.559), total complication rate (39.7% vs. 51.2%, P=0.250), fistula mortality (25.9% vs. 30.2%, P=0.628) were all reduced. There were significantly higher R0 rate (91.4% vs.76.7%, P=0.041) and more harvested lymph nodes (16.2 vs. 11.4, P=0.000) and lower total and local recurrence: rate (half-year local recurrence rate: 7.8% vs. 23.7%, P=0.036; one-year local recurrence rate: 18.2% vs. 39.5%, P=0.018) and longer disease-free survival (16.9 months vs. 13.4 months, P=0.044) and overall survival(22.5 months vs. 19.9 months, P>0.05) were also found in the study group.@*Conclusions@#Mesopancreas is different from mesorectum since it has no fascial envelop, which should be regarded as a surgical concept, rather than an anatomical structure. Total mesopancreas excision is safe and feasible for pancreatic head cancer and probably helps to increase the R0 resection rate and improve the clinical outcomes.

Risk factors of postoperative pancreatic fistula after pancreaticoduodenectomy and its predictive score / 中华外科杂志

<p><b>OBJECTIVE</b>To develop and test a scoring system to predict the risks of postoperative pancreatic fistula (POPF) after pancreaticoduodenectomy(PD).</p><p><b>METHODS</b>Clinic data and postoperative complications of the 445 consecutive patients who underwent a PD procedure between January 2008 and April 2015 in Peking University First Hospital were retrospectively collected and analyzed.The patients were randomly selected to modelling and validation sets at a ratio of 3∶1, respectively.The patient data were subjected to univariate and multivariate analysis in the modelling set of patients.A score predictive of POPF was designed and tested in the validation set.</p><p><b>RESULTS</b>POPF occurred in 88 of 334 patients(26.4%) in the modelling set.The multivariate analysis showed that body mass index (BMI, P<0.01) and pancreatic duct width(P=0.001) are associated with POPF independently.A risk score to predict POPF was constructed based on these factors and successfully tested.The area under the receiver operating characteristic curve were 0.829(95% CI: 0.777-0.881) on the modelling set and 0.885(95% CI: 0.825-0.945) on the validation set, respectively.</p><p><b>CONCLUSIONS</b>BMI and pancreatic duct width were associated with POPF after PD. The preoperative assessment of a patient's risk for POPF is feasible.The present risk score is a valid tool to predict POPF in patients undergoing PD, to make the selection on anastomosis types, and to take precautions against POPF.</p>

Application of an intrauterine system for controlled release of levonorgestrel in perimenopausal women / 中华老年医学杂志

Objective To investigate the effect of an intrauterine system for controlled release of levonorgestrel (LNC-IUS) in perimenopausal women.Methods A total of 105 perimenopausal patients (aged from 42 53 years with a mean age of 45.8±2.9 years) treated with LNGr-IUS in Beijing Hospital were enrolled in this study.Retrospective analysis concerning reasons for device placement,clinical effects and adverse reactions was conducted.Results Of the patients,25 (23.8％) had menorrhagia,38 (36.2％) had dysmenorrhea,16 (15.2％) had a combination of menorrhagia and dysmenorrhea,9 (8.6％) had undergone cystectomy for endometriosis followed by gonadotropinreleasing hormone-analogue (GnRH-a) therapy,13 (12.4 ％) had simple endometrial hyperplasia,and 4 (3.8％) had leiomyoma combined with systemic disorders.A statistical difference in the average hemoglobin level was found in menorrhagia patients with anemia before and after treatment [(99.4 ±19.1) g/L vs.(123.3±24.5) g/L,P＜0.01].Dysmenorrhea symptom scores decreased six months after treatment[(5.9± 1.0) vs.(3.0±0.7)],P＜0.05).No adnexal masses were found on Bultrasound 12 months after treatment in patients who had undergone cystectomy for endometriosis.For patients with simple endometrial hyperplasia,diagnostic dilation and curettage 12 months after treatment showed normal endometrial morphology,with a total effectiveness rate of 100％.No adverse reactions were found.Conclusions The intrauterine levonorgestre[-releasing system is effective in the treatment of menorrhagia,dysmenorrhea and simple endometrial hyperplasia,and can prevent the recurrence of endometriotic cyst in perimenopausal women.