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Characterization of cryopreserved human Langerhans cells
Koo Il Seo1, Chang Hun Huh, Ji Hyun Han
1Department of Dermatology, Seoul National University College of Medicine, 28, Yungon-Dong, Chongno-Gu, Seoul 110-744, Republic of Korea.
Insights
Cryopreservation of human Langerhans cells (LCs) is now possible. This method preserves LCs' function and phenotype, enabling advanced immunological research.
Area of Science:
- Immunology
- Cell Biology
- Cryobiology
Background:
- Epidermal Langerhans cells (LCs) are crucial antigen-presenting cells.
- Establishing a cryopreservation method for human LCs is vital for research.
- LCs are sensitive to cold injury, hindering previous cryopreservation attempts.
Purpose of the Study:
- To investigate the effects of cryopreservation on human LCs.
- To establish a reliable method for cryopreserving LCs.
- To assess the functional and phenotypic integrity of cryopreserved LCs.
Main Methods:
- Human LCs isolated using immunomagnetic microbeads and anti-CD1a antibodies.
- Cryopreservation using 10% dimethylsulfoxide (DMSO) and 90% fetal calf serum.
- Phenotypic analysis via flow cytometry (HLA-DR, CD1a) and ultrastructural examination via electron microscopy.
- Functional assessment through autologous T cell stimulation tests.
Main Results:
- Cryopreservation maintained over 90% viability of human LCs.
- Cryopreserved LCs exhibited high expression of HLA-DR and CD1a.
- Cryopreserved LCs demonstrated T cell stimulation capabilities nearly identical to fresh LCs.
Conclusions:
- Successful cryopreservation of human Langerhans cells is achievable.
- Cryopreserved LCs retain essential functions and phenotypes for research.
- This breakthrough facilitates diverse experimental applications involving human LCs.
Abstract:
Epidermal Langerhans cells are potent antigen-presenting cells in the epidermis. The establishment of a cryopreservation method for human Langerhans cells would greatly contribute to our ability to successfully conduct various experiments dealing with Langerhans cells. Since Langerhans cells are known to be sensitive to cold injury, there have been no reports concerning the cryopreservation of Langerhans cells. We have investigated the effect of cryopreservation on the function and phenotype of human Langerhans cells. Langerhans cells from human foreskins were isolated with the immunomagnetic microbead method using monoclonal antibodies for CD1a. Langerhans cells were cryopreserved in the presence of dimethylsulfoxide (DMSO) 10% and fetal calf serum 90%. Cryopreserved Langerhans cells were phenotypically assessed by flowcytometry using monoclonal antibodies to HLA-DR and CD1a. The ultrastructures of the Langerhans cells were compared using electron microscopy. An autologous T cell stimulation test was performed to compare the functions of cryopreserved Langerhans cells and fresh Langerhans cells. The viability of the cryopreserved Langerhans cells was able to be maintained at more than 90%. Cryopreserved Langerhans cells expressed high levels of HLA-DR and CD1a antigens and stimulated autologous T cells to an extent almost identical to that obtained from fresh Langerhans cells. These findings indicate that the cryopreservation of human Langerhans cells could lead to a breakthrough in various experiments dealing with human Langerhans cells.
