Advanced multimodality imaging of an anomalous vessel between the ascending aorta and main pulmonary artery in a dog

A 1-year-old male German shorthaired pointer was referred for evaluation of tachypnea and hemoptysis. A grade VI/VI left basilar continuous murmur was ausculted. Multimodality imaging consisting of thoracic radiographs, transthoracic and transesophageal echocardiography, fluoroscopy-guided selective angiography, computed tomography angiogram (CTA) and magnetic resonance angiogram (MRA), was performed on this patient. The defect included a left-to-right shunting anomalous vessel between the ascending aorta and main pulmonary artery, along with a dissecting aneurysm of the main and right pulmonary artery. An MRA post-processing technique (PC VIPR) was used to allow for high resolution angiographic images and further assessment of the patient's hemodynamics prior to surgical correction. This case report describes the clinical course of a canine patient with a rare form of congenital cardiac disease, and the multiple imaging modalities that were used to aid in diagnosis and treatment.     

Recovery of Bioactive Peptides and Omega-3 Fatty Acids-Containing Phospholipids from Squid Processing By-Product Hydrolysate

ABSTRACT

The present study examined whether bioactive peptides and omega-3 fatty acids-containing phopholipids could be recovered from squid processing by-product (SPB) hydrolysate. The hydrolysate was produced at 55°C for varying times with endogenous proteases and centrifuged to yield peptides-containing supernatant and phospholipids-containing precipitate. The supernatant showed angiotensin I-converting enzyme (ACE) inhibitory activity with half maximal inhibitory concentration (IC₅₀) values decreasing with hydrolysis time from 2.11 mg (0 h) to 1.71 mg (1 h), 1.38 mg (1.5 h), and 1.34 mg (2 h). Two-hour squid hydrolysate was further fractionated to isolate the most active fraction whose molecular weight was found to be below 10 kDa with IC₅₀ of 0.32 mg. The phospholipids-containing precipitate (45.6 g/100 g oil) was analyzed for a fatty acid profile, with the levels of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) being 16.86 and 29.24 g/100 g oil, respectively. The ACE inhibition by hydrolysate peptides and omega-3 fatty acid recovery support the nutraceutical potential of the SPB hydrolysate.     

5-羟色胺转运体抑制剂对肺动脉高压肉鸡肺小动脉中膜5-HT量和平滑肌细胞增殖的影响

【目的】探讨肉鸡肺小动脉中膜5-羟色胺（5-HT）含量与肺小动脉平滑肌细胞增殖的关系,明确5-羟色胺转运体（5-HTT）是否参与了肉鸡肺动脉高压的发生。【方法】20日龄科宝肉鸡分成非诱病组（静脉注射生理盐水,包括空白对照组、氟西汀、西酞普兰组,30只/组）和诱病组（静脉注射纤维素微粒,包括药物空白对照组、氟西汀组、西酞普兰组,50只/组）。自21d起,记录肺动脉高压综合征（PHS）发病率,并分别于21、28、35、42d从各组随机抽样,测定右心室/全心室重量比（RV/TV）,采用免疫组织化学技术、增殖细胞核抗原（PCNA）染色和核仁组织区嗜银蛋白（AgNOR）染色方法检测肺小动脉中膜5-HT量及肺小动脉平滑肌细胞增殖情况。【结果】诱病组PHS发病率、RV/TV明显高于非诱病组（P＜0.05）,肺小动脉中膜5-HT量增加,平滑肌细胞上嗜银颗粒增多,PCNA阳性细胞增多,而两种5-HTT抑制剂（氟西汀和西酞普兰）能明显减少肉鸡PHS发病率和肺小动脉中膜5-HT量,抑制平滑肌细胞增殖,但两种药物之间无明显差异。【结论】在肉鸡肺动脉高压发生过程中,由5-HTT介导的肺小动脉平滑肌细胞内5-HT增多,引起肺小动脉平滑肌细胞过度增殖,导致肉鸡PHS发生,5-HTT可能是防治肉鸡PHS的有意义靶分子。     

ACE和ACE2在自发性高血压大鼠肾脏中的表达与作用分析

为观察血管紧张素转化酶(ACE)和血管紧张素转化酶2(ACE2)在自发性高血压大鼠肾脏中的表达及它们与高血压形成的关系,取14周雄性Wistar-京都种大鼠(WKY)和自发性高血压大鼠(SHR)各8只,自由采食和饮水1周后测定大鼠收缩压(SBP)、舒张压(DBP)和心率(HR),称重后断头处死,取血液和肾脏组织进行如下试验:放免法测定血浆中血管紧张素Ⅱ(AngⅡ)含量,肾脏组织中ACE、AT1、ACE2和Mas mRNA表达水平的Real-time PCR分析,肾脏组织中ACE2蛋白表达的比较分析。试验结果表明:SHR大鼠SBP和DBP均显著高于WKY大鼠,而心率和体重无显著差异(P>0.05);SHR大鼠血浆中AngⅡ含量和肾脏组织中ACE mRNA表达水平均显著高于WKY大鼠(P<0.05),肾脏组织中ACE2 mRNA和蛋白表达水平均显著低于WKY大鼠(P<0.05),2组大鼠肾脏组织中AT1和Mas mRNA表达没有显著差异(P>0.05)。SHR大鼠肾脏中ACE的mRNA表达显著升高,而ACE2的mRNA和蛋白表达均显著下降。高血压时,肾脏局部组织中ACE和ACE2表达失衡,表现为ACE-AngⅡ-...     

银丹心脑通联合小剂量辛伐他汀治疗高血压合并高脂血症临床观察

目的 探究银丹心脑通软胶囊联合小剂量辛伐他汀对老年高血压合并高脂血症患者的影响。方法 采用随机数字表法将老年高血压合并高血脂症患者214例分为观察组与对照组,对照组采用辛伐他汀,观察组患者采用银丹心脑通软胶囊联合小剂量辛伐他汀治疗;对比两组患者血液流变学指标、血脂、血压、IL-6、ox-LDL及hs-CRP水平。结果 观察组患者治疗后全血高切黏度、全血低切黏度、血浆黏度纤维蛋白原及红细胞聚集指数均明显低于对照组（P<0.05）;观察组患者治疗后TC、TG、LDL-C明显低于对照组（P<0.05）,HDL-C明显高于对照组（P<0.05）;观察组患者治疗后IL-6、hs-CRP及ox-LDL显著低于对照组（P<0.05）;观察组患者治疗后收缩压及舒张压均显著低于对照组（P<0.05）。结论 银丹心脑通软胶囊联合小剂量辛伐他汀治疗老年高血压合并高脂血症患者能够有效纠正其血液流变学代谢紊乱,调节血脂水平,减轻炎性症状,降低血压水平。     

参麦注射液对高血压心衰大鼠血浆代谢组学的影响

目的 研究参麦注射液对高血压心衰大鼠血浆代谢组学的影响。方法 通过8% NaCl高盐饲料喂养Dahl盐敏感性大鼠制造高血压心衰模型,成模大鼠分为模型组、参麦注射液组,并同时设置正常组,干预15 d后,采集正常组、模型组和参麦注射液组大鼠的血浆样本,运用气相色谱-质谱（GC-MS）联用技术及多元统计分析进行研究。结果 3组的代谢图谱存在显著差异。与正常组相比,模型组19种代谢物水平紊乱;经参麦注射液干预后,亮氨酸、鸟氨酸、丙氨酸、4-羟基-脯氨酸、苏氨酸、天冬酰胺、苏糖醇、丙酮酸、尿素浓度向正常方向显著回调,苏糖酸、半胱氨酸、色氨酸、甲基半胱氨酸、花生四烯酸、胆固醇、木糖醇、核糖醇、焦谷氨酸、丙二酸浓度无显著改变,此外还发现异亮氨酸浓度上升。结论 高血压心衰大鼠血浆代谢组学出现变化,参麦注射液能有效改善部分紊乱的代谢物水平,其作用机制与改善糖代谢、氨基酸代谢紊乱,调节支链氨基酸水平相关,未发现有改善脂代谢紊乱的作用。