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Updated: Apr 27, 2026
Isolation of Primary Mouse Lung Endothelial Cells
Published on: November 10, 2021
[A method for primary culture of pulmonary microvascular endothelial cells]
Jiantao Jia1, Huiying Zhang1, Limin Wang2
1Department of Pathophysiology, Changzhi Medical College, Changzhi 046000, China.
Objective:
To explore a simple and practical method of primarily culturing rat pulmonary microvascular endothelial cells (PMECs) in vitro, and observe the cell growth status and identify the PMECs.
Methods:
Wistar rats (n=40, aged 4-5 weeks) were sacrificed to take the lung tissue. After removal of pleura, the peripheral lung tissues were cut into pieces (1 mm(3)) in aseptic condition. The endothelial cells were cultured in the DMEM medium containing heparin sodium and in the RPMI1640 medium supplemented with special additives or not, respectively. Cell growth and morphology was observed under an inverted microscope. The expression of CD31 in cells was detected by immunofluorescence staining.
Results:
After incubation for 24 hours, PMECs in the medium containing special additives were the most in number and purity compared with the other two culture systems. At 24 hours, endothelial cells migrated from the lung tissue, and at 14 days, the cells aggregated and grew obviously, exhibiting a polygon shape, being tightly arranged and paving the base of Petri dish. After sub-culturing, the cells spread much more and most cells became spindle shaped, which showed a tendency of endothelial cell angiogenesis in vitro. CD31 was positive in immunofluorescence staining.
Conclusion:
The adherent culture method of tissue explants in the medium added by the special additives was proved to a good method to obtain a high-purity rat PMECs in vitro.
Insights
A new method using special additives in culture medium effectively isolates high-purity rat pulmonary microvascular endothelial cells (PMECs) in vitro. This technique supports robust cell growth and identification, crucial for pulmonary research.
Area of Science:
- Cell Biology
- Pulmonary Medicine
- Endothelial Cell Research
Background:
- Pulmonary microvascular endothelial cells (PMECs) are vital for lung function and disease research.
- Establishing reliable in vitro models for PMECs is crucial for studying lung physiology and pathology.
- Existing methods for culturing PMECs may lack efficiency or purity.
Purpose of the Study:
- To develop a simple and practical method for primary culture of rat PMECs.
- To optimize culture conditions for high purity and yield of PMECs.
- To confirm the identity of cultured cells as PMECs.
Main Methods:
- Lung tissue from Wistar rats was processed into small explants.
- Endothelial cells were cultured in DMEM with heparin or RPMI1640 with/without special additives.
- Cell morphology, growth, and CD31 expression (immunofluorescence) were analyzed.
Main Results:
- The culture medium with special additives yielded the highest number and purity of PMECs after 24 hours.
- Cultured cells exhibited characteristic endothelial morphology, including polygon and spindle shapes.
- Cells showed aggregation, paving, and angiogenesis-like tendencies in vitro.
- CD31 expression confirmed the identity of the cultured cells as PMECs.
Conclusions:
- Adherent culture of tissue explants in a medium with special additives is an effective method for obtaining high-purity rat PMECs in vitro.
- This optimized method facilitates the study of PMEC behavior and function.
- The technique provides a valuable tool for pulmonary research and drug development.
