早产儿血清炎性因子与生长发育指标的关系及对新生儿呼吸窘迫综合征的预测研究

摘要 目的：分析早产儿血清炎性因子与生长发育指标的关系及对新生儿呼吸窘迫综合征（RDS）的预测效能。方法：选择2018年1月至2020年10月在我院出生的98例早产儿作为研究对象,根据是否并发RDS,分为RDS组（58例）和非RDS组（40例）。检测两组血清白细胞介素-1β（IL-1β）、IL-6、IL-8、肿瘤坏死因子-α（TNF-α）、降钙素原（PCT）水平,记录生长发育指标,通过Pearson相关性分析早产儿血清炎性因子与生长发育指标的关系,使用受试者工作特征曲线（ROC）分析血清炎性因子对新生儿呼吸窘迫综合征的预测效能。结果：RDS组血清IL-1β、IL-6、IL-8、TNF-α、PCT水平均高于非RDS组（P＜0.05）;RDS组胎龄、出生体重均小于非RDS组（P＜0.05）;经Pearson相关性分析,早产儿血清IL-1β、IL-6、IL-8、TNF-α、PCT水平均与胎龄、出生体重呈负相关（P＜0.05）;经多因素Logistic回归分析,IL-1β、IL-6、IL-8、TNF-α、PCT均是早产儿并发新生儿呼吸窘迫综合征的独立危险因素（P＜0.05）;经ROC曲线分析,IL-1β、IL-6、IL-8、TNF-α联合PCT预测早产儿并发新生儿呼吸窘迫综合征的AUC为0.910。结论：早产儿血清IL-1β、IL-6、IL-8、TNF-α均与胎龄及出生体重密切相关,这些炎性因子联合预测RDS发生的效能较好,值得临床予以重视应用。     

术前预后营养指数和血清转铁蛋白与老年髋部骨折患者术后切口愈合的关系及其预测价值分析

摘要 目的：研究术前预后营养指数（PNI）和血清转铁蛋白（TRF）与老年髋部骨折（HF）患者术后切口愈合不良（PWH）的关系及其预测价值。方法：选取2020年1月～2022年3月南京市中医院收治的252例接受手术治疗老年HF患者,根据术后切口愈合情况分为PWH组（n=27）和非PWH组（n=225）。收集患者基础资料、术前PNI和血清TRF水平。采用多因素Logistic回归分析老年HF患者术后PWH的影响因素,受试者工作特征（ROC）曲线分析PNI和血清TRF水平对老年HF患者术后PWH的预测价值。结果：252例老年HF患者术后出现27例PWH,其中24例切口长时间不愈合,3例切口裂开。与非PWH组比较,PWH组体质量指数（BMI）和白蛋白、淋巴细胞计数（LC）、PNI、血清TRF水平更低,糖尿病比例和术中出血量更高（P＜0.05）。多因素Logistic回归分析显示,BMI≥18.5 kg/m²（OR=0.648,95％CI：0.457～0.919）、PNI（OR=0.954,95％CI：0.932～0.976）、血清TRF（OR=0.484,95％CI：0.307～0.761）升高是老年HF患者术后PWH的保护因素,糖尿病（OR=2.651,95％CI：1.182～5.948）、术中出血量增加（OR=1.013,95％CI：1.005～1.021）是危险因素（P＜0.05）。ROC曲线分析显示,PNI和血清TRF水平单独与联合预测老年HF患者术后PWH的曲线下面积（AUC）分别为0.808、0.770、0.871,灵敏度分别为70.37％、55.56％、92.59％,特异度分别为80.65％、85.81％、70.32％。二者联合预测老年HF患者术后PWH的AUC大于二者单独预测（P＜0.05）。结论：术前PNI和血清TRF水平降低是老年HF患者术后PWH的危险因素,二者联合对老年HF患者术后PWH的预测价值较高。     

Feline Leukemia Virus-B Envelope Together With its GlycoGag and Human Immunodeficiency Virus-1 Nef Mediate Resistance to Feline SERINC5

Human SERINC5 (SER5) protein is a recently described restriction factor against human immunodeficiency virus-1 (HIV-1), which is antagonized by HIV-1 Nef protein. Other retroviral accessory proteins such as the glycosylated Gag (glycoGag) from the murine leukemia virus (MLV) can also antagonize SER5. In addition, some viruses escape SER5 restriction by expressing a SER5-insensitive envelope (Env) glycoprotein. Here, we studied the activity of human and feline SER5 on HIV-1 and on the two pathogenic retroviruses in cats, feline immunodeficiency virus (FIV) and feline leukemia virus (FeLV). HIV-1 in absence of Nef is restricted by SER5 from domestic cats and protected by its Nef protein. The sensitivity of feline retroviruses FIV and FeLV to human and feline SER5 is considerably different: FIV is sensitive to feline and human SER5 and lacks an obvious mechanism to counteract SER5 activity, while FeLV is relatively resistant to SER5 inhibition. We speculated that similar to MLV, FeLV-A or FeLV-B express glycoGag proteins and investigated their function against human and feline SER5 in wild type and envelope deficient virus variants. We found that the endogenous FeLV recombinant virus, FeLV-B but not wild type exogenous FeLV-A envelope mediates a strong resistance against human and feline SER5. GlycoGag has an additional but moderate role to enhance viral infectivity in the presence of SER5 that seems to be dependent on the FeLV envelope. These findings may explain, why in vivo FeLV-B has a selective advantage and causes higher FeLV levels in infected cats compared to infections of FeLV-A only.     

中国蔷薇属植物物种丰富度分布格局及其与环境因子的关系

物种丰富度的大尺度地理格局及其成因是宏观生态学及生物地理学的中心议题之一。蔷薇属(Rosa L.)植物具有很高的经济价值和生态价值,探讨中国蔷薇属植物的丰富度分布格局及其影响因素可为该属植物资源的保护和合理开发利用乃至其系统进化研究提供重要依据。基于蔷薇属植物在中国的15451条分布数据和11种地理、气候等环境因子进行了物种丰富度分析和相关性分析,研究结果显示:(1)蔷薇属植物在中国分布不均匀。在水平方向上,蔷薇属植物于26.19°—34.29°N带内有较高的物种丰富度,之后随着纬度的增加而降低,且随着经度的增加表现为先增加后减少,于99.10°—108.47°E间存在明显的峰值;在垂直方向上,蔷薇属植物的物种丰富度随海拔的增加表现为先增加后减少,956.46—3518.60m范围内的丰富度最高。西南横断山区为蔷薇属物种分布的中心地区,新疆北部及东北长白山周边地区为局部聚集区。(2)蔷薇属物种丰富度与各能量、水分和生境异质性因子均呈正相关关系,与气候稳定性因子呈负相关关系。表明中国蔷薇属植物在水分和热量条件好、气候季节性变化小且生境异质性程度高的地方,有着更高的物种丰富度。(3)蔷薇属...     

福建省安溪县土地利用时空演变规律及其关键驱动因素

以福建省安溪县为研究边界,选取了1999—2019年该县及所属乡镇的耕地、林地、草地、园地、水域、建设用地和未利用地等7个土地利用类型作为物种变量,与其相关性较大的社会经济指标为环境变量,采用典范对应分析和空间自相关等方法进行分析,以明确安溪县和所属乡镇的土地利用时空演变特征及其关键驱动因素。研究结果表明:安溪县1999—2019年间土地利用类型变化总体上呈"三减四增"态势,并在全局空间分布格局上呈明显的聚焦状态。全县耕地、草地和水域面积分别减少36.82%、22.91%和8.18%,而林地、园地(主要是茶园)、建设用地和未利用地面积则分别增加了10.37%、56.39%、206.08%和90.14%。就林地面积而言,近10年来安溪县24个乡镇中有1/3的乡镇林地呈下降趋势。其中,祥华、大坪、虎邱、参内、福田和城厢6个乡镇林地面积减少明显。研究表明:在县域水平上,主要土地利用类型变化,除了受地理因素的制约外,主要受社会经济指标和宏观政策的驱动因素调控。排位最大的前3个因素分别是社会消费品零售总额、地区生产总值和茶叶产量。在镇域水平上,不同乡镇由于地理条件,特别是城镇化水平和经济发展状况...     

Radial growth response of Pinus densiflora and Quercus spp. to topographic and climatic factors in South Korea

Aims This study aimed to develop radial growth models and to predict the potential spatial distribution of Pinus densiflora (Japanese red pine) and Quercus spp. (Oaks) in South Korea, considering topographic and climatic factors.Methods We used a dataset of diameter at breast height and radial growth estimates of individual trees, topographic and climatic factors in systematic sample plots distributed over the whole of South Korea. On the basis that radial growth is attributed primarily to tree age, we developed a radial growth model employing tree age as an explanatory variable. We estimated standard growth (SG), defined as radial growth of the tree at age 30, to eliminate the influence of tree age on radial growth. In addition, SG estimates including the Topographic Wetness Index, temperature and precipitation were calculated by the Generalized Additive Model.Important findings As a result of variogram analysis of SG, we found spatial autocorrelation between SG, topographic and climatic factors. Incremental temperature had negative impacts on radial growth of P. densiflora and positive impacts on that of Quercus spp. Precipitation was associated with positive effects on both tree species. Based on the model, we found that radial growth of P. densiflora would be more vulnerable than that of Quercus spp. to climatic factors. Through simulation with the radial growth model, it was predicted that P. densiflora stands would be gradually replaced with Quercus spp. stands in eastern coastal and southern regions of South Korea in the future. The models developed in this study will be helpful for understanding the impact of climatic factors on tree growth and for predicting changes in distribution of P. densiflora and Quercus spp. due to climate change in South Korea.     

Arterial cells and CNS sheath cells from Aplysia californica produce factors that enhance neurite outgrowth in co-cultured neurons

Substrate-bound and soluble factors regulate neurite outgrowth and synapse formation during development, regeneration, and learning and memory. We report that sheath cells from CNS connectives and arterial cells from the anterior aorta of the sea slug, Aplysia californica, enhance neurite outgrowth from co-cultured Aplysia neurons. Sheath and arterial cell cultures contain several cell types, including fibrocytes, myocytes, and amoebocytes. When compared to controls (neurons with defined growth medium alone), the percentage of neurons with growth and the average neurite lengths are significantly enhanced by sheath and arterial cells at 48 h after plating of the neurons; these parameters are comparable to those of neurons cultured in medium containing hemolymph. Our results indicate that sheath cells produce substrate-bound factor(s) and arterial cells produce diffusible factor(s) that promote growth. These growth factors likely promote neuron survival and neurite outgrowth during neural plasticity exhibited in the adult CNS. Electronic Publication     

幽门螺杆菌感染并发消化性溃疡的危险因素及预防对策分析

目的:分析幽门螺杆菌感染并发消化性溃疡的危险因素,并实施预防对策。方法:选取我院收治的消化性溃疡的患者201例,对其临床资料进行回顾性分析,分析其危险因素。结果:消化性溃疡患者201例,Hp感染162例,Hp阳性率80.60%,不同类型的消化性溃疡的Hp阳性率比较,差异无统计学意义(P0.05)。单因素分析结果显示,年龄在36-60岁、共食、男性、暴饮暴食、喜爱辛辣食物、吸烟饮酒、个人卫生、家族病史、以往病史,均是消化性溃疡Hp感染的高危因素。进餐习惯、喜欢酸奶、个人卫生均是Hp感染的保护因素,而暴饮暴食、喜爱辛辣食物、年龄、以往病史、吸烟饮酒、家族病史均是Hp感染的危险因素。结论:分餐习惯、喜欢酸奶、个人卫生均是Hp感染的保护因素,而暴饮暴食、喜爱辛辣食物、年龄、以往病史、吸烟饮酒、家族病史是Hp感染的危险因素,进行有针对性的预防可降低疾病发生率。     

小柴胡颗粒联合盐酸氨溴索雾化对慢性支气管炎急性发作期患者临床疗效的影响

目的:研究小柴胡颗粒联合盐酸氨溴索雾化治疗慢性支气管炎急性发作期的临床效果及对炎症因子的影响。方法:选择2016年1月至2016年7月我院治疗的160例慢性支气管急性发作患者作为研究对象,按照治疗方法将其分为观察组和对照组,对照组使用盐酸氨溴索雾化吸入方式治疗,观察组在此基础上联合服用小柴胡颗粒治疗,观察比较两组患者治疗后临床效率、临床症状消失时间以及治疗前后两组患者肺功能、炎症因子水平的变化。结果:观察组总有效率高于对照组,两组比较差异显著(P0.05);观察组的血清IL-6、IL-8、TFN-α水平明显低于对照组,且肺功能、临床症状消失时间均明显的优于对照组,差异具有统计学意义(P0.05)。结论:使用小柴胡颗粒联合盐酸氨溴索雾化治疗急性发作期的慢性支气管炎患者能显著的缩短其临床症状消失时间,改善患者的肺功能,提高其临床疗效,可能与其有效抑制炎症反应有关。