Current Issue

Volume 20, Number 4, Jan-Mar(Winter) 2019, Serial Number: 80, Pages: 469-476

Hydrocortisone Promotes Differentiation of Mouse Embryonic Stem Cell-Derived Definitive Endoderm toward Lung Alveolar Epithelial Cells


Mohammad Reza Mokhber Dezfouli, D.V.M., D.V.Sc., 1, 2, *, Sirous Sadeghian Chaleshtori, D.V.M., D.V.Sc, 1, 2, Azadeh Moradmand, M.Sc, 3, Mohsen Basiri, Ph.D., 3, Hossein Baharvand, Ph.D, 3, 4, Yaser Tahamtani, Ph.D., 3, *,
Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
Institute of Biomedical Research, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
Department of Developmental Biology, University of Science and Culture, ACECR, Tehran, Iran
*Corresponding Addresses: P.O.Box: 14155-6453 Department of Internal Medicine Faculty of Veterinary Medicine University of Tehran Tehran Iran P.O.Box: 16635-148 Department of Stem Cells and Developmental Biology Cell Science Research Center Royan Institute for Stem Cell Biology and Technology ACECR Tehran Iran Emails:mokhberd@ut.ac.ir,yasertahamtani@royaninstitute.org

Abstract

Objective

The ability to generate lung alveolar epithelial type II (ATII) cells from pluripotent stem cells (PSCs) enables the study of lung development, regenerative medicine, and modeling of lung diseases. The establishment of defined, scalable differentiation methods is a step toward this goal. This study intends to investigate the competency of small molecule induced mouse embryonic stem cell-derived definitive endoderm (mESC-DE) cells towards ATII cells.

Materials and Methods

In this experimental study, we designed a two-step differentiation protocol. mESC line Royan B20 (RB20) was induced to differentiate into DE (6 days) and then into ATII cells (9 days) by using an adherent culture method. To induce differentiation, we treated the mESCs for 6 days in serum-free differentiation (SFD) media and induced them with 200 nM small molecule inducer of definitive endoderm 2 (IDE2). For days 7-15 (9 days) of induction, we treated the resultant DE cells with new differentiation media comprised of 100 ng/ml fibroblast growth factor (FGF2) (group F), 0.5 μg/ml hydrocortisone (group H), and A549 conditioned medium (A549 CM) (group CM) in SFD media. Seven different combinations of factors were tested to assess the efficiencies of these factors to promote differentiation. The expressions of DE- and ATII-specific markers were investigated during each differentiation step.

Results

Although both F and H (alone and in combination) promoted differentiation through ATII-like cells, the highest percentage of surfactant protein C (SP-C) expressing cells (~37%) were produced in DE-like cells treated by F+H+CM. Ultrastructural analyses also confirmed the presence of lamellar bodies (LB) in the ATII-like cells.

Conclusion

These results suggest that hydrocortisone can be a promoting factor in alveolar fate differentiation of IDE2- induced mESC-DE cells. These cells have potential for drug screening and cell-replacement therapies.