ObjectiveTo study the clinical effect of silver dressing combined with foam dressing in the treatment of diabetic foot ulcers. MethodsSixty patients with diabetic foot ulcer treated between January 2014 and January 2015 were selected to be randomly divided into experimental group (n=30) and control group (n=30). Patients in the experimental group (n=30) were treated with silver dressing combined with foam dressing which was changed every other day, while patients in the control group (n=30) were treated with 0.1% rivanol gauze and dressing was changed every day. The clinical effcacy of the two groups were compared and analyzed, and the wound closure index and recurrence rate were also analyzed. ResultsThe total effective rate of the experimental group was 96.7%, which was significantly higher than that of the control group (80.0%) (P<0.05), and the wound closure indexes of the experimental group on day 21 [(81.87±4.81)%] and day 28 [(97.28±3.11)%] after the beginning of treatment was significantly higher than those of the control group [(64.06±3.03)%, (86.93±6.11)%] (P<0.05), and the recurrence rate within half a year after treatment of the experimental group was 13.0%, significantly lower than that of the control group (40.0%) (χ2=4.083, P=0.043). ConclusionCompared with traditional wound treatment, silver dressing combined with foam dressing in the treatment of diabetic foot ulcers has advantages with better curative effect, less pain and lower recurrence rate. It is worth clinical promoting.
ObjectiveTo investigate the effect of inhibiting autotaxin (ATX)-lysophosphatidic acid (LPA) pathway on the cartilage of knee osteoarthritis in rats.MethodsPrimary chondrocytes within three generations of Sprague-Dawley rats (8 weeks old, male) were randomly divided into 6 groups, including blank control group, model group, 1 μmol/L PF-8380 group, 10 μmol/L PF-8380 group, 1 μmol/L Ki16425 group, and 10 μmol/L Ki16425 group. Except for the blank control group, the other groups were modeled with osteoarthritis using interleukin-1β (10 ng/mL, 24 h), and then the experimental groups, i.e., 1 μmol/L PF-8380 group, 10 μmol/L PF-8380 group, 1 μmol/L Ki16425 group, and 10 μmol/L Ki16425 group, were intervened with 1, 10 μmol/L PF-8380 (ATX inhibitor) and 1, 10 μmol/L Ki16425 (LPA receptor antagonist) for 24 h, respectively. immunocytochemistry staining was used to determine the expression of type Ⅱ collagen (Col Ⅱ) in cytoplasm, and Western Blot was used to determine the expression of ATX, LPA, and matrix metalloproteinase-13 (MMP-13) in chondrocytes.ResultsCompared with the blank control group, the average absorbance of Col Ⅱ in chondrocytes in the model group was significantly reduced (0.003 9±0.000 8 vs. 0.110 0± 0.009 0, P<0.05). The expression levels of ATX, LPA, and MMP-13 in chondrocytes in the model group, 1 μmol/L PF-8380 group, 10 μmol/L PF-8380 group, and 1 μmol/L Ki16425 group were significantly higher than those in the blank control group, while the expression levels of ATX, LPA, and MMP-13 in the 10 μmol/L Ki16425 group had no significant difference with those in the blank control group; the expression levels of ATX, LPA, and MMP-13 in the model group, 10 μmol/L PF-8380 group, and 1 μmol/L PF-8380 group decreased in order; the expression levels of ATX, LPA, and MMP-13 in the model group, 1 μmol/L Ki16425 group, and 10 μmol/L Ki16425 group decreased in order.ConclusionInhibiting ATX-LPA pathway may inhibit the up-regulation of MMP-13 levels in articular cartilage of osteoarthritis in rats to reduce the damage of cartilage.
ObjectiveTo construct a scientific, standardized, and consistent nursing service quality evaluation system for hemodialysis centers, and to provide scientific basis for the evaluation, improvement, and promotion of nursing service quality in hemodialysis centers.MethodsFrom October to December 2018, based on the Servqual model, combined with the particularity of hemodialysis center and relevant national policies and regulations, the indexes of nursing service quality were determined by Delphi method and precedence chart method, and the nursing service quality evaluation scale of hemodialysis center was established.ResultsThe established nursing service quality evaluation system for hemodialysis center was consisted of 7 items of first-level, 15 items of second-level, and 38 items of third-level. The effective recovery rate of expert letters was 93.75%, and the expert authority coefficient was 0.914. The Kendall coordination coefficients for the three levels of indicators were 0.570, 0.583, and 0.496 (P<0.01), and the variation coefficients for each level of indicators were between 0.000 and 0.179. Among the first-level indicators, the largest weight was security, and the smallest weight was effectiveness.ConclusionsThe evaluation system of nursing service quality for hemodialysis centers is scientific, reliable, and feasible. In view of the particularity of nursing service in hemodialysis centers, clear evaluation criteria are put forward, which can evaluate the service quality more comprehensively, scientifically, objectively, and directly, and improve and enhance the service level of hemodialysis centers according to the evaluation system.
Objective To systematically review the relationship between obesity and the incidence of digestive system cancers. Methods The PubMed, EMbase, The Cochrane Library, CNKI and WanFang Data databases were electronically searched to collect cohort studies on the relationship between obesity and digestive system cancers from January 1st, 2001 to October 31st, 2021. Two reviewers independently screened the literature, extracted data, and assessed the risk of bias of the included studies. Meta-analysis was then performed by using RevMan 5.4 software. Results A total of 16 cohort studies were included. The results of meta-analysis revealed that compared with normal weight, obesity increased the incidence rate of various cancers of the digestive system, including colorectal cancer (RR=1.25, 95% CI 1.13 to 1.39, P<0.000 1), liver cancer (RR=1.65, 95%CI 1.41 to 1.92, P<0.000 01), pancreatic cancer (RR=1.34, 95%CI 1.19 to 1.51, P<0.000 01), gastric cancer (RR=1.09, 95%CI 1.05 to 1.14, P<0.000 1), and esophageal cancer (RR=2.39, 95%CI 1.98 to 2.89, P<0.000 01). Conclusion The current evidence indicates that obesity can increase the incidence rate of digestive system cancers. Due to the limited quality and quantity of the included studies, more high-quality studies are needed to verify the above conclusion.
目的 比较使用流式细胞仪355 nm和407 nm激光器激发Hochest33342检测细胞凋亡。 方法 通过ATO药物诱导急性早幼粒白血病细胞（NB4）及血清饥饿法诱导人肺癌细胞（NCl-H292）细胞凋亡，取24、48 h时间点收集细胞，进行Hoechst33342-碘化丙啶（PI）双染，分别在配置有两种激光器的流式细胞仪上检测细胞凋亡。 结果 细胞经处理后24 h，355 nm激光器检测NB4细胞凋亡率Hoechst33342+/PI-：（28.20 ± 4.80）%；NCl-H292细胞凋亡率Hoechst33342+/PI-：（22.47 ± 2.78）%。407 nm激光器检测NB4细胞凋亡率Hoechst33342+/PI-：（25.10 ± 6.19）%。NCl-H292细胞凋亡率Hoechst33342+/PI-：20.47 ± 1.46%。处理后48 h，355 nm激光器检测NB4细胞凋亡率Hoechst33342+/PI-：（33.60 ± 3.75）%。NCl-H292细胞凋亡率Hoechst33342+/PI-：（26.77 ± 1.16）%。407 nm激光器检测NB4细胞凋亡率Hoechst33342+/PI-：（29.47 ± 2.33）%。NCl-H292细胞凋亡率Hoechst33342+/PI-：（31.47 ± 3.05）%。两种细胞处理后比处理前凋亡率明显升高，但355 nm激光器与407 nm激光器检测的凋亡结果差异不明显（P＞0.05）。 结论 407 nm激光器激发Hoechst33342可检测细胞凋亡。
Objective To investigate the effect of peptidoglycan (PGN) on the secretion of pro-inflammatory cytokines by dendritic cells (DCs) and the regulation of T helper 17 (Th17) responses in experimental autoimmune uveitis. Methods Bone marrow cells from naive mice were cultured with granulocyte macrophage-colony-stimulating factor and interleukin (IL)-4 to induce DCs. DCs cultured for six days were randomly divided into two groups: PGNtreated group and control group. The DCs in PGNtreated group were stimulated with PGN and the same volume of phosphate buffered saline was added to the DCs as control group. The relative mRNA expression levels of IL-23, tumor necrotic factor alpha; (TNF-alpha;), IL-6,IL-1beta;were measured by real-time reverse transcriptase polymerase chain reaction (RT-PCR). Peptide fragment of interphotoreceptor retinoidbinding protein (IRBP1-20)specific T cells, which were isolated from the spleen and draining lymph nodes of C57BL/6 mice immunized with IRBP1-20 peptide fragments 13 days earlier, were co-cultured with PGN-treated or untreated DCs, respectively. Total RNA from T cells cocultured for two days were isolated and the relative expression of retinoic acid receptor-related orphan receptor gamma;t (ROR-gamma;t), IL-17, T-box expression in T cells (T-bet), interferon gamma; (IFN-gamma;) mRNA were detected by realtime RT-PCR. On the second, the fifth and the seventh day, the cocultured T cells were analyzed by flow cytometry to detect the percentages of IFN-gamma;, IL-17 positive cells. Results The real-time RT-PCR results revealed that the level of IL-23, IL-1beta;, IL-6, TNF-alpha; mRNA from PGNstimulated DCs were significantly increased compared to the control group (t=-14.363, -5.627, -3.85, -28.151; P＜0.05). The level of RORgamma;t, IL-17 mRNA from the T cells cocultured with PGN-stimulated DCs were greatly increased compared with the control group (t=-5.601, -19.76；P＜0.05). However, the level of T-bet, IFN-gamma; mRNA from the T cells cocultured with PGNstimulated DCs were significantly decreased compared with the control group (t=4.717, 11.207; P＜0.05). Data of flow cytometry showed that at two days, five days, seven days after cocultured with PGN-treated DCs, the percentages of IL-17 positive T cells were increased compared to the control group (t=-2.944, -3.03, -4.81; P＜0.05), and the percentages of IFN-gamma; positive T cells had no remarkable change (t=-1.25, -0.18, -2.16; P＞0.05). Conclusion PGN can promote the secretion of Th17-related cytokines by DCs, which favors proliferation and differentiation of Th17 in experimental autoimmune uveitis.
【摘要】 目的 探讨淋巴结转移数目对行手术治疗的结肠癌患者预后的影响。 方法 回顾性分析2005年1月-2007年12月符合筛选标准的148例行手术治疗的结肠癌患者的临床和随访资料，按照淋巴结转移数目进行分组：N0组（0枚）91例、N1组（1～3枚）41例、N2组（≥4枚）16例，采用Kaplan-Meier法进行生存分析，用Log-rank比较3组术后3年生存率，等级资料采用秩和检验，用χ2检验进行两两比较术后3年局部复发率、远处转移率和死亡率情况。 结果 N0、N1、N2 3组的术后3年生存率分别为88.1%、71.4%、61.1%，3组生存率差异有统计学意义（P=0.003）；N0、N1、N2 3组的总体局部复发率、远处转移率和死亡率的差异有统计学意义（P=0.006，0.001，0.005）。 结论 淋巴结转移数目是结肠癌患者术后3年生存情况的危险因素，无淋巴结转移的患者术后3年生存情况明显比有淋巴结转移者好。【Abstract】 Objective To discuss the impact of the number of lymph node metastasis on the prognosis of patients with colon cancer after surgical operation. Methods The clinical data of 148 patients with colon cancer who underwent surgical operation between January 2005 and December 2007 were analyzed retrospectively. According to the number of lymph node metastasis, the patients were divided into three groups, group N0(the number of lymph metastasis equals to 0), group N1(the number of lymph node metastasis ranges from 1 to 3) and group N2 (the number of lymph node metastasis was equal or greater than 4). And we chose Kaplan-Meier to analyze patients′ survival and Log-rank test was used to compare the 3-year survival index; rank sum test was used to analyze the level data, and then chi-square test was chosen to compare local recurrence rate, metastasis rate and mortality among the three groups. Results The indexes of the 3-year survival in group N0 (91 cases), group N1 (41 cases) and group N2(16 cases) wre 88.1%, 1.4%, and 61.1%, respectively. The differences were significant (P=0.003). Besides, the differences between group N0 and N1, N0 and N2 were both significant (P=0.012,0.002); the differences between group N1 and N2 was not significant (P=0.344). The differences among three groups in local recurrence rate, metastasis rate and mortality were all significant(P=0.006, 0.001, 0.005); the differences between group N0 and N1 in local recurrence rate, metastasis rate and mortality were significant (P=0.008, 0.000, 0.012); the differences between group N0 and N2 in local recurrence rate, metastasis rate and mortality were significant (P=0.021, 0.047, 0.010), while the differences between group N1 and N2 in local recurrence rate, metastasis rate and mortality were not significant (P=1.000,0.585,0.523). Conclusion The number of lymph node metastasis is a dangerous factor to the 3-year survival in patients with colon cancer after operation, and the prongnosis of the 3-year survival in patients without lymph node metastasis is better than that in patients′ with lymph node metastasis.
ObjectiveTo develop a method to quantitatively determine the microparticles (MP) from different sources in plasma by nine-color flow cytometry. MethodsAnnexin-V and 8 antibodies including CD235a, CD41a, CD45, CD34, CD66b, CD20, CD3 and CD14 were used to establish nine-color flow cytometric panel.Platelet poor plasma samples were single-stained and stained with 1 of 8 antibodies lacking respectively, and then we determined the detector voltages and compensations.From December 2014 to January 2015, we detected and analyzed 10 plasma samples from normal adults, and repeatability test and dilution tests were done. ResultsIn staining lacking 1 of 8 antibodies, the percentage of positive MP populations change was all less than 15% based on the population number in single-stained experiment.In dilution tests, there were good linear correlations between MPs from platelets and erythrocytes.In repeatability test, the coefficient of variation of MP from erythrocytes, platelets and granulocytes was all less than 10%.In the platelet poor plasma samples from normal adults, MP from platelets, erythrocytes, endotheliocytes, monocytes, granulocytes, B and T lymphocytes could be detected, and the average concentration of them were respectively 132.6/μL[(60.6-288.9)/μL], 35.4/μL[(22.0-99.7)/μL], 21.6/μL[(3.3-45.5)/μL], 13.9/μL[(7.3-35.1)/μL], 60.0/μL[(22.5-101.2)/μL], 21.9/μL[(6.0-33.4)/μL]and 1.2/μL[(0.7-2.8)/μL]. ConclusionsQuantitatively determining MP from different sources in plasma by nine-color flow cytometry has been successfully developed.This method is simple and fast, and can be applied in clinical detection.
Objective To extend its application in the field of bone repair by adding oxygen-carboxymethylated chitosan (O-CMC) and gentamicin for modification of the calcium sulfate cement (CSC). Methods The O-CMC/CSC was prepared by adding O-CMC with different concentrations (0.1wt%, 0.3wt%, 0.5wt%, 0.7wt%, and 1.0wt%) in the CSC liquid phase. The effect of O-CMC on the CSC was evaluated by testing the injectability, compressive strength, degradation rate, pH value, cytotoxicity and osteogenesis. After the optimal concentration of O-CMC was determined, gentamicin with different concentrations (0.5wt%, 1.5wt%, and 2.5wt%) was added in the O-CMC/CSC, and then the compressive strength and antibacterial properties were investigated. Results After adding O-CMC in the CSC liquid phase, the injection time of O-CMC/CSC was increased to more than 5 minutes; it significantly prolonged with increased concentration of O-CMC (P<0.05). The compressive strength of the modified bone cement was in the range of 11-18 MPa and it was the highest when the concentration of O-CMC was 0.5wt% (P<0.05). The degradation rate of O-CMC/CSC was not influenced obviously by O-CMC (P>0.05). The pH value was in the range of 7.2-7.4 and Ca2+ concentration was in the range of 6-8 mmol/L.In vitro mineralization experiment indicated that the induced mineralization ability of O-CMC/CSC was much higher than that of pure CSC. The 0.5wt% O-CMC/CSC had the best performance; the compressive strength of the composite bone cement was above 5 MPa after gentamicin was added, which had antibacterial effect. Conclusion O-CMC is able to effectively improve the injection, compressive strength, and osteogenic activity of CSC; in addition, antibacterial properties is obtained in the CSC after adding gentamicin.