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Isolation and culture of rat intestinal mucosal microvascular endothelial cells using immunomagnetic beads
Yanmei Wu1, Zhaoli Wang1, Ge Hu1
1Beijing Key Laboratory of Traditional Chinese Veterinary Medicine, Animal Science and Technology College, Beijing University of Agriculture, Bejing 102206, China.
Abstract:
Microvascular endothelial cells (MVECs) have been an important tool in many research fields, while their purification remained challenging, particularly from thin and fragile tissues, such as murine intestinal mucosae. Therefore, we established an immunomagnetic method for isolating rat intestinal mucosal MVECs using an automatic magnetic separation system from the primary cell culture, which was preliminarily purified by the differential adhesion combined with mechanically scraping method. The CD31+ cells were separated and their purity was about 96.5%, which grew into a contact-inhibited cobblestone-like monolayer after about 6-day incubation. Transmission electron microscopy analysis showed the presence of Weibel-Palade bodies. The endothelial tubes formed on Matrigel for about 4-h cultivation. The MVECs could grow well until at least passage 10. Immunofluorescence staining indicated that factor VIII (FVIII), CD31 and CD34 were generally expressed in the MVECs. The fluorescence intensity of FVIII was higher after magnetic separation than before, while those of CD31 and CD34 didn't have significant difference. In conclusion, highly pure MVECs were isolated from rat intestinal mucosae using magnetic beads coated with anti-CD31 antibodies, and magnetic separation may influence the expression of FVIII.
Insights
Researchers developed a new immunomagnetic method to isolate highly pure microvascular endothelial cells (MVECs) from rat intestinal tissue. This technique enhances cell purity and offers a valuable tool for various research applications.
Area of Science:
- Cell Biology
- Vascular Biology
- Biotechnology
Background:
- Microvascular endothelial cells (MVECs) are crucial research tools.
- Purifying MVECs, especially from fragile tissues like intestinal mucosa, presents significant challenges.
- Existing methods often lack efficiency and purity.
Purpose of the Study:
- To establish an efficient immunomagnetic method for isolating rat intestinal mucosal MVECs.
- To characterize the purity and growth properties of isolated MVECs.
- To investigate the impact of magnetic separation on MVEC marker expression.
Main Methods:
- Preliminary purification of primary cell culture using differential adhesion and mechanical scraping.
- Immunomagnetic separation using anti-CD31 antibody-coated magnetic beads and an automated system.
- Cell culture, transmission electron microscopy, Matrigel tube formation assay, and immunofluorescence staining.
Main Results:
- Achieved high purity (approx. 96.5%) of CD31+ MVECs.
- Isolated MVECs formed cobblestone-like monolayers and exhibited Weibel-Palade bodies.
- Cells demonstrated endothelial tube formation and stable growth up to passage 10.
- Factor VIII (FVIII) expression increased post-magnetic separation, while CD31 and CD34 showed no significant change.
Conclusions:
- The developed immunomagnetic method effectively isolates highly pure MVECs from rat intestinal mucosa.
- Magnetic separation may influence the expression levels of specific endothelial markers like FVIII.
- This method provides a reliable source of MVECs for research purposes.
