Application of AMSC-MALAT1-Exo to preparation of medicine for treating hepatic diseases and preparation method of AMSC-MALAT1-Exo
A liver disease, amsc-malat1-exo technology, applied in the application of liver macrophage targeting biological preparations, the preparation of liver disease treatment biological preparations, the construction of adipose-derived mesenchymal stem cells and the field of exosome preparation, can Solve the problems of difficult mass preparation and limited preparation technology
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Embodiment 1
[0070] Example 1 AMSC-MALAT1-Exo can mediate the transfer of MALAT1 to macrophages
[0071] qRT-PCR analysis of MALAT1 was performed as described above. Such as figure 1 As shown on the left, AMSC-MALAT1-Exo contains high levels of MALAT1.
[0072] AMSC-MALAT1-Exo, AMSC-Ctrl-Exo, and native AMSC-Exo were added to macrophage RAW264.7, and the cells were collected after 24 hours for qPCR analysis of MALAT1 levels.
[0073] qPCR results showed that AMSC-MALAT1-Exo could significantly up-regulate the MALAT1 level of macrophages compared with AMSC-Ctrl-Exo and native AMSC-Exo ( figure 1 right).
Embodiment 2
[0074] Example 2 AMSC-MALAT1-Exo regulates macrophage phenotype
[0075] Add gradient concentrations of AMSC-MALAT1-Exo, AMSC-Ctrl-Exo and native AMSC-Exo (0.2 μg / mL, 4 μg / mL, 80 μg / mL) to macrophage RAW264.7, and add corresponding volume of PBS as In the control group (Vehicle), the cells were collected after 24 hours for qPCR analysis of macrophage phenotype-related molecules.
[0076] Compared with AMSC-Ctrl-Exo and natural AMSC-Exo, AMSC-MALAT1-Exo can more significantly up-regulate the expression of molecules related to M2 phenotype of macrophages Arg1 and Fizz-1, while down-regulate the expression of M1 phenotype under the same concentration conditions Expression of related molecules CD86 and iNOS. AMSC-MALAT1-Exo can significantly affect the expression of M1 / 2 phenotype-related molecules at a concentration of 0.2 μg / mL, while AMSC-Ctrl-Exo and native AMSC-Exo can significantly regulate the M1 / 2 phenotype at a concentration of 80 μg / mL Expression of related molecules (...
Embodiment 3
[0077] Example 3 AMSC-MALAT1-Exo regulates the secretion of macrophage inflammatory factors
[0078] Macrophages RAW264.7 were treated with gradient concentrations of AMSC-MALAT1-Exo, AMSC-Ctrl-Exo and natural AMSC-Exo (0.2 μg / mL, 4 μg / mL, 80 μg / mL) for 24 hours, and corresponding volumes of PBS was used as the control group (Vehicle); and then stimulated with LPS (100ng / mL) for 12h, and then ELISA was used to detect the levels of IL-1β, IL-33 and HMGB1 in the cell supernatant.
[0079] Under the same concentration conditions, AMSC-MALAT1-Exo can more significantly reduce the secretion of LPS-induced macrophage inflammatory factors IL-1β, IL-33 and HMGB1 than AMSC-Ctrl-Exo and natural AMSC-Exo. AMSC-MALAT1-Exo can significantly inhibit the secretion of macrophage inflammatory factors at a concentration of 0.2 μg / mL, and its inhibitory effect is comparable to that of AMSC-Ctrl-Exo and natural AMSC-Exo at a concentration of 80 μg / mL ( image 3 ).
[0080] Moreover, the AMSC-Ex...
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