To study the philosophical structure of the heart of white rhinoceros.We made partin em-bedsections of the heart wall.We kept the sections by he,Observed the sections under bright field microscope,And photographed by ...To study the philosophical structure of the heart of white rhinoceros.We made partin em-bedsections of the heart wall.We kept the sections by he,Observed the sections under bright field microscope,And photographed by photography.The heart structural features were observed and analyzed by image analysis system.The Cardiff wall can be divided into endocardium,Myocardium and epicardium from inside to outside.The average thickness Endocardium was 260μM.Myocardium was thick,The left ventricle myocardium was tickest,AV-eraging 33mm.And the average thickness of epicardium was 225μM.Purkinje fibers arranged in groups of 2-3 rows under the endocardium,And formed a round nodouble between the atrium and ventricle.The diameter of Purkinje fiber was about 52μM and most cells were irregular,Square,Or elongated stripes with the longest major axis up to 286μM.Most nucleus were round,Lost at the edge of cells.The diameter of Venetian muscle fiber was 10μM.Nether myocardial stripes nor intercalated disks were obvious.Cardiac muscle fibers arranged closely,With full blood vessels along them.Conclusion:This study provide reliable physical evidence to rhinoce-ros physiology and clinical veterinary and other related disciplines.展开更多
Left ventricular non-compaction cardiomyopathy (LVNC) is a rare cardiomyopathy. The major clinical manifestations are systemic embolism ventricular arrhythmias, heart failure, and sudden death. It is characterized by ...Left ventricular non-compaction cardiomyopathy (LVNC) is a rare cardiomyopathy. The major clinical manifestations are systemic embolism ventricular arrhythmias, heart failure, and sudden death. It is characterized by left ventricular myocardium w让h two distinct layers including non-compaction and compaction [123]. The clinical diagnosis of LVNC depends on imaging studies. The absence of definitive diagnostic criteria and specific biomarkers causes LVNC misdiagnosis.展开更多
This study aimed to seek necrosis avid agents with high safety from DNA binding agents. The interaction of 5-hydroxytryptophan(5-HTP) with DNA was investigated by a series of spectroscopic studies. Then, 5-HTP was lab...This study aimed to seek necrosis avid agents with high safety from DNA binding agents. The interaction of 5-hydroxytryptophan(5-HTP) with DNA was investigated by a series of spectroscopic studies. Then, 5-HTP was labeled with iodine-131([131I]5-HTP) and the necrosis avidity of [131I]5-HTP was evaluated by in vitro cell binding assays, in vivo biodistribution experiments and blocking experiment. Finally, the potential of [131I]5-HTP to image necrotic myocardium was explored in rat models with myocardial infarction by SPECT/CT imaging. Results showed that 5-HTP bound to DNA in groove binding mode and the binding constant was 1.69×104 L/mol. [131I]5-HTP showed specific affinity to necrotic A549 cells,which might be related to cell nucleus. Biodistribution and autoradiography results showed preferential accumulation of [131I]5-HTP in necrotic muscle(necrotic/viable muscle ratio: 6.95 ? 0.68 at 3 h postinjection(p.i.)), which could be blocked by 5-HTP with 66.7% decline, indicating that [131I]5-HTP might share the same necrotic targets with 5-HTP. On SPECT/CT images, a hotspot was clearly observed at 3h p.i.in the necrotic myocardium while not in the control myocardium. In conclusion, [131 I]5-HTP is a novel necrosis avid agent and can rapidly visualize necrotic myocardium at 3 h p.i. The necrosis avidity mechanism of [131 I]5-HTP may be attributed to its interactions with exposed DNA in the necrotic tissues.展开更多
文摘To study the philosophical structure of the heart of white rhinoceros.We made partin em-bedsections of the heart wall.We kept the sections by he,Observed the sections under bright field microscope,And photographed by photography.The heart structural features were observed and analyzed by image analysis system.The Cardiff wall can be divided into endocardium,Myocardium and epicardium from inside to outside.The average thickness Endocardium was 260μM.Myocardium was thick,The left ventricle myocardium was tickest,AV-eraging 33mm.And the average thickness of epicardium was 225μM.Purkinje fibers arranged in groups of 2-3 rows under the endocardium,And formed a round nodouble between the atrium and ventricle.The diameter of Purkinje fiber was about 52μM and most cells were irregular,Square,Or elongated stripes with the longest major axis up to 286μM.Most nucleus were round,Lost at the edge of cells.The diameter of Venetian muscle fiber was 10μM.Nether myocardial stripes nor intercalated disks were obvious.Cardiac muscle fibers arranged closely,With full blood vessels along them.Conclusion:This study provide reliable physical evidence to rhinoce-ros physiology and clinical veterinary and other related disciplines.
基金This work was supported by the grant from CAMS Innovation Fund for Medical Sciences (CAMS-I2M,2016-I2M-1-015).
文摘Left ventricular non-compaction cardiomyopathy (LVNC) is a rare cardiomyopathy. The major clinical manifestations are systemic embolism ventricular arrhythmias, heart failure, and sudden death. It is characterized by left ventricular myocardium w让h two distinct layers including non-compaction and compaction [123]. The clinical diagnosis of LVNC depends on imaging studies. The absence of definitive diagnostic criteria and specific biomarkers causes LVNC misdiagnosis.
基金the National Natural Science Foundation of China(Nos.81473120,81501536,81473120).
文摘This study aimed to seek necrosis avid agents with high safety from DNA binding agents. The interaction of 5-hydroxytryptophan(5-HTP) with DNA was investigated by a series of spectroscopic studies. Then, 5-HTP was labeled with iodine-131([131I]5-HTP) and the necrosis avidity of [131I]5-HTP was evaluated by in vitro cell binding assays, in vivo biodistribution experiments and blocking experiment. Finally, the potential of [131I]5-HTP to image necrotic myocardium was explored in rat models with myocardial infarction by SPECT/CT imaging. Results showed that 5-HTP bound to DNA in groove binding mode and the binding constant was 1.69×104 L/mol. [131I]5-HTP showed specific affinity to necrotic A549 cells,which might be related to cell nucleus. Biodistribution and autoradiography results showed preferential accumulation of [131I]5-HTP in necrotic muscle(necrotic/viable muscle ratio: 6.95 ? 0.68 at 3 h postinjection(p.i.)), which could be blocked by 5-HTP with 66.7% decline, indicating that [131I]5-HTP might share the same necrotic targets with 5-HTP. On SPECT/CT images, a hotspot was clearly observed at 3h p.i.in the necrotic myocardium while not in the control myocardium. In conclusion, [131 I]5-HTP is a novel necrosis avid agent and can rapidly visualize necrotic myocardium at 3 h p.i. The necrosis avidity mechanism of [131 I]5-HTP may be attributed to its interactions with exposed DNA in the necrotic tissues.