聚—（羟丙基、丙基）—天冬酰胺材料体外酶解及植入小鼠体内的观察

目的：观察4种不同摩尔比的聚－（羟丙基、丙基）－天冬酰胺材料在体外酶解和植入小鼠体内后的变化。方法;用木瓜蛋白酶和胰酶对材料作了体外酶解试验,用凝胶色谱法对降解物碎片作了测定;用光镜、扫描电镜、透射电镜等对材料在埋植部位、肝、肾组织内的降解碎片进行观察;对材料植入小鼠体内后的生化指标（血红蛋白、白细胞、谷丙转氨酶、肌酐作了测定。结果：聚－（羟丙基、丙基）－天冬酰胺材料在体外能被逐步酶解。在植入小鼠体内的5周内,在埋植部位、肝、肾组织内能观察到材料的碎片。结论：聚－（羟丙基、丙基）－天冬酰胺材料能在体内、外逐步降解,植入小鼠体内后对动物的血象、肝、肾功能无明显的影响,具有生物相容性。     

高效液相色谱法测定家兔血浆中赤芍B801的浓度

用反相高效液相色谱法测定家兔血浆中赤芍801PG浓度。采用NucieoselC₁₈色谱柱,甲醇∶水∶冰乙酸(48∶50∶2)为流动相,4羟基苯甲酸乙酯为内标物,紫外检测波长275nm,对ivPG后不同时间家兔血浆中药物含量进行测定。结果表明:PG浓度为2.5μg/ml的平均回收率为96.70%,其RSD=1.83%。浓度5μg/ml的样品平均回收率为98.86%,RSD=1.05%。其最低检测限为0.1μg/ml。     

LC-QQQ-MS/MS分析苯磺酸氨氯地平中痕量苯磺酸酯类基因毒性杂质

摘要：目的 建立LC-QQQ-MS/MS分析测定苯磺酸氨氯地平中痕量苯磺酸酯类基因毒性杂质苯磺酸甲酯、苯磺酸乙酯、苯磺酸丙酯和苯磺酸异丙酯的检测方法。方法 采用Agilent Zorbax SB-C18（3.0mm×100mm,1.8μm）色谱柱,以水（含 5mMol?L-1甲酸铵和0.1%甲酸）和甲醇（含5mMol?L-1甲酸铵和0.1%甲酸）为流动相,梯度洗脱,流速0.4 mL?min-1,电喷雾离子化（ESI）,正离子模式下MRM采集。结果 苯磺酸甲酯定量限为20 ng?mL-1,苯磺酸乙酯、苯磺酸丙酯和苯磺酸异丙酯定量限为1 ng·mL-1;方法精密度良好,保留时间和峰面积RSD%均小于5%（n=10）;苯磺酸甲酯在20~1000ng·mL-1,苯磺酸乙酯、苯磺酸丙酯和苯磺酸异丙酯在1~1000ng?mL-1的浓度范围内呈良好的线性关系,r≥0.998;方法准确度良好,平均加标回收率（n=10）分别为99.77%、100.19%、94.21%和92.43%。5个不同厂家生产的苯磺酸氨氯地平中苯磺酸甲酯的含量均小于LOQ（8μg?g-1）,苯磺酸乙酯、苯磺酸丙酯和苯磺酸异丙酯的含量均小于LOQ（0.4μg?g-1）。结论 该方法可用于苯磺酸氨氯地平中痕量基因毒性杂质苯磺酸甲酯、苯磺酸乙酯、苯磺酸丙酯和苯磺酸异丙酯含量的检测分析。     

建立HPLC法测定盐酸洛美沙星滴眼液中5种抑菌剂

目的 建立同时测定盐酸洛美沙星滴眼液中5种抑菌剂(羟苯甲酯、羟苯乙酯、硫柳汞、苯扎溴铵和苯扎氯铵)的HPLC方法。方法 采用Extend C18(4.6mm×250mm, 5μm)色谱柱,流动相为1%三乙胺溶液(磷酸调pH值至3.0)-甲醇,梯度洗脱,流速为1.0mL/min,柱温35℃,检测波长为262nm。结果 羟苯甲酯、羟苯乙酯、硫柳汞、苯扎溴铵/苯扎氯铵各峰均分离良好;羟苯甲酯在0.0410~0.8204mg/mL范围内线性关系良好(r=1.0000),平均回收率为100.2%(RSD=0.8%, n=9);羟苯乙酯在0.0400~0.7996mg/mL范围内线性关系良好(r=1.0000),平均回收率为100.3%(RSD=0.7%, n=9);硫柳汞在0.0806~1.6112mg/mL范围内线性关系良好(r=0.9995),平均回收率为100.8%(RSD=0.9%, n=9);苯扎溴铵在0.0204~0.4076mg/mL范围内线性关系良好(r=0.9998),平均回收率为100.0%(RSD=0.9%, n=9);苯扎氯铵0.0197~0.3932mg/mL范围内线性关系良好(r=1.0000),平均回收率为100.4%(RSD=1.0%, n=9)。结论 该方法准确、灵敏、简便,可用于盐酸洛美沙星滴眼液中羟苯甲酯、羟苯乙酯、硫柳汞、苯扎溴铵及苯扎氯铵5种抑菌剂的检查。     

Thyroid disruption properties of three indoor dust chemicals tested in Silurana tropicalis tadpoles

Indoor dust contains a multitude of industrial chemicals, and ingestion of dust is considered an important exposure route to organic contaminants. Some of these contaminants have been shown to interfere with the thyroid system, which may result in significant consequences on public health. The amphibian metamorphosis is a thyroid hormone‐dependent process, which can be used as an in vivo model for studies on thyroid hormone‐disrupting potency. Three contaminants of indoor dust were tested on metamorphosing Silurana (Xenopus) tropicalis tadpoles. The tested chemicals were Tris (1,3‐dichloroisopropyl) phosphate (TDCiPP), tetrabromobisphenol‐A (TBBPA) and propylparaben (PrP). Measurements reflecting general growth, development progress and thyroid epithelial cell height were performed on the exposed tadpoles as well as chemical analyses of the exposure water. It was shown that TDCiPP acts as a thyroid hormone‐disrupting chemical in metamorphosing tadpoles by causing increased epithelial cell height in thyroid glands after exposure to a nominal concentration of 0.010 mg/L and in higher concentrations. TBBPA caused reductions in general growth of tadpoles at the nominal concentration 0.125 mg/L, and PrP caused acute toxicity at the nominal concentration 12.5 mg/L. However, no evident indications of specific thyroid‐disrupting effects caused by TBBPA or PrP were observed.     

高效液相色谱法同时测定对羟基苯甲酸酯类及对羟基苯甲酸

目的 建立同时测定口服液体制剂中羟苯甲酯、羟苯丙酯及其降解产物对羟基苯甲酸的反相高效液相色谱系统,为口服制剂中防腐剂含量控制提供依据。方法 采用反相高效液相色谱法,色谱柱为Luna C18柱(250mm?4.6mm,5μm);以0.1%磷酸溶液为流动相A,以乙腈为流动相B,梯度洗脱;检测波长为254nm;流速为1.0ml/min。结果 羟苯甲酯在24.02~72.02μg/mL范围内,羟苯丙酯在3.04~9.04μg/mL范围内,对羟基苯甲酸在0.28~0.84μg/mL范围内浓度均与峰面积呈良好线性关系,线性方程分别为A=90569C 122945(r=0.9999)、A=86802C 15680(r=0.9999)和A=532.5C-498.6(r=0.9999);平均回收率分别为99.7%、99.8%和98.9%;对羟基苯甲酸检出限为0.10ng结论 该方法简便、准确,可用于口服液体制剂中防腐剂羟苯甲酯、羟苯丙酯及其降解产物对羟基苯甲酸含量测定。     

培丙酯治疗缺血性心肌病疗效观察

目的 研究培丙酯对缺血性心肌病的治疗作用.方法 选择缺血性心肌病患者80例,随机分为培丙酯治疗组及5-单硝酸异山梨酯对照组.治疗2周,分别比较心功能、血液流变学、炎症指标变化情况.结果 2周后,2组患者病情均有改善,治疗组疗效更佳.结论 培丙酯治疗缺血性心肌病可以明显改善心肌缺血及心功能不全表现,疗效显著,是治疗缺血性心肌病的有效方法之一.     

The Allium Derivate Propyl Propane Thiosulfinate Exerts Anti-Obesogenic Effects in a Murine Model of Diet-Induced Obesity

Allium species and their organosulfur-derived compounds could prevent obesity and metabolic dysfunction, as they exhibit immunomodulatory and antimicrobial properties. Here, we report the anti-obesogenic potential and dose-dependent effects (0.1 or 1 mg/kg/day) of propyl propane thiosulfinate (PTS) in a murine model of diet-induced obesity. The obesogenic diet increased body weight gain and adipocyte size, and boosted inflammatory marker (Cd11c) expression in the adipose tissue. Conversely, PTS prevented these effects in a dose-dependent manner. Moreover, the higher dose of PTS improved glucose and hepatic homeostasis, modulated lipid metabolism, and raised markers of the thermogenic capacity of brown adipose tissue. In the colon, the obesogenic diet reduced IL-22 levels and increased gut barrier function markers (Cldn3, Muc2, Reg3g, DefaA); however, the highest PTS dose normalized all of these markers to the levels of mice fed a standard diet. Gut microbiota analyses revealed no differences in diversity indexes and only minor taxonomic changes, such as an increase in butyrate producers, Intestimonas and Alistipes, and a decrease in Bifidobacterium in mice receiving the highest PTS dose. In summary, our study provides preclinical evidence for the protective effects of PTS against obesity, which if confirmed in humans, might provide a novel plant-based dietary product to counteract this condition.     

Pulmonary delivery of siRNA against acute lung injury/acute respiratory distress syndrome

The use of small interfering RNAs (siRNAs) has been under investigation for the treatment of several unmet medical needs, including acute lung injury/acute respiratory distress syndrome (ALI/ARDS) wherein siRNA may be implemented to modify the expression of pro-inflammatory cytokines and chemokines at the mRNA level. The properties such as clear anatomy, accessibility, and relatively low enzyme activity make the lung a good target for local siRNA therapy. However, the translation of siRNA is restricted by the inefficient delivery of siRNA therapeutics to the target cells due to the properties of naked siRNA. Thus, this review will focus on the various delivery systems that can be used and the different barriers that need to be surmounted for the development of stable inhalable siRNA formulations for human use before siRNA therapeutics for ALI/ARDS become available in the clinic.     

没食子酸丙酯对脑缺血大鼠神经元SAPK/JNK及p38MAPK激活的抑制作用

目的探讨没食子酸丙酯对大鼠脑缺血再灌注模型缺血区周边组织神经元损伤的保护作用及其可能机制。方法通过Nissl和TUNEL染色法检测阳性神经元数量，蛋白免疫印迹、免疫组化法观察活化型Caspase-3，SAPK/JNK，p38MAPK及其磷酸化组分的表达。结果没食子酸丙酯干预后，SAPK/JNK，p-SAPK/JNK(1 h)，p38MAPK，p-p38MAPK(6 h)及活化型Caspase-3(12 h)表达均减弱，TUNEL阳性神经元减少(24 h)，Nissl阳性神经元增多(24 h)，神经元凋亡率明显降低。结论没食子酸丙酯保护缺血再灌注后神经元损伤的机制可能与抑制SAPK/JNK及p38MAPK的激活有关。