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Zhongguo Zhong Yao Za Zhi ; 46(12): 3165-3170, 2021 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-34467709


Nucleic acid aptamers, broad-spectrum target-specific single-stranded oligonucleotides, serve as molecules in targeted therapy, targeted delivery and disease diagnosis for the treatment of tumor or microbial infection and clinical detection. Due to the existence of components in the use of traditional Chinese medicine(TCM), the target is difficult to concentrate and the specificity of treatment is poor. The effective components of TCM are toxic components, so a highly sensitive detection method is urgently needed to reduce the toxicity problem at the same time. The combined application of TCM and modern medical treatment strategy are difficult and cannot improve the therapeutic effect. Aptamers, advantageous in biosensors, aptamer-nanoparticles for targeted drug delivery, and aptamer-siRNA chimeras, are expected to connect Chinese medicinals with nanotechnology, diagnostic technology and combined therapies. We summarized the preparation, screening, and modification techniques of nucleic acid aptamers and the biomedical applications and advantages in therapy, targeting, and diagnosis, aiming at providing a reference for the in-depth research and development in TCM.

Aptâmeros de Nucleotídeos , Ácidos Nucleicos , Sistemas de Liberação de Medicamentos , Medicina Tradicional Chinesa , RNA Interferente Pequeno
Sichuan Da Xue Xue Bao Yi Xue Ban ; 43(5): 770-4, 2012 Sep.
Artigo em Chinês | MEDLINE | ID: mdl-23230758


OBJECTIVE: To establish an extracorporeal circulation (ECC) rat model, and evaluate the inflammatory response and organ injury induced in the model. METHODS: SD rats were anesthetized and cannulated from right common carotid artery to left femoral vein to establish the bypass of extracorporeal circulation. Then the rats were randomly divided into ECC group and sham group. The rats in ECC group were subjected to extracorporeal circulation for 2 hours and then rest for 2 hours, while the rats in sham group were only observed for 4 hours without extracorporeal circulation. After that, blood routine examination, blood gas analysis, the measurement of pro-inflammatory factors in bronchoalveolar lavage fluid and lung tissue were performed to evaluate the lung injury induced by ECC. Circulating endothelial cells were also calculated by flow cytometry to assess the vascular endothelial injury. RESULTS: At 2 hours after ECC, red blood cell counts in both groups kept normal, while leukocyte and neutrophil counts, plasmatic tumor necrosis factor-a level and neutrophil elastase level, circulating endothelial cells in the rats of ECC group were significantly higher than those in sham group. Tumor necrosis factor-alpha in bronchoalveolar lavage fluid and water content in lung of the ECC rats were also significantly higher, while the oxygenation index was significantly lower. Neutrophil infiltration was also observed in lung tissues with increased thickness of alveolar membrane in ECC group. CONCLUSION: The ECC model established from right common carotid artery to left femoral vein in our study can successfully induce systemic inflammatory response, and acute lung injury associated with inflammation.

Circulação Extracorpórea/efeitos adversos , Modelos Animais , Síndrome de Resposta Inflamatória Sistêmica/etiologia , Lesão Pulmonar Aguda/etiologia , Animais , Masculino , Ratos , Ratos Sprague-Dawley