Published September 30, 2025 | Version Published
Journal Article Open

Derivation of embryonic stem cells across avian species

Abstract

Germline-competent embryonic stem (ES) cells have been successfully derived from mice and rats, but not from other species. Here we report the development of culture conditions for deriving ES cells from chickens and seven other avian species. Chicken ES cells express core pluripotency markers and can differentiate into cells of all embryonic germ layers, as well as extra-embryonic lineages. Notably, chicken ES cells contribute to high rates of chimerism when injected into chicken embryos and give rise to germ cells both in vitro and in ovo, confirming their germline competence. In addition, we demonstrated that ES cell self-renewal pathways are conserved among avian species, allowing ES cells from multiple avian species to be established using optimized chicken ES cell culture conditions. The establishment of authentic avian ES cells lays the groundwork for future applications in genetic engineering and the conservation of avian biodiversity.

Copyright and License

Copyright © 2025, The Author(s). Open Access. This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by-nc-nd/4.0/.

Data Availability

The RNA-seq datasets generated in this study have been uploaded to the Gene Expression Omnibus under the accession numbers GSE254284 (chicken) and GSE298550 (quail, goose and ostrich). Publicly available RNA-seq datasets used in this study: mouse ES cells in naive, formative and primed states. GSE131555 (ref. 64); chicken embryos from EGK.I to EGK.VIII. GSE86592 (ref. 86); chicken embryos at HH4. SRX540095 (Weizmann Institute). Publicly available reference genomes used in this study: chicken reference genome (Ensembl GRCg6_106), quail reference genome (Ensembl Coturnix_japonica.Coturnix_japonica_2.0.113), goose reference genome (Ensembl Anser_cygnoides.GooseV1.0.113) and Ostrich reference genome (Ensembl Struthio_camelus_australis.ASM69896v1.113).

Acknowledgement

We thank the Proteomics Core Facility at the University of Southern California for liquid chromatography with tandem mass-spectrometry analysis; the Millard and Muriel Jacobs Genetics and Genomics Laboratory at the California Institute of Technology for next-generation sequencing; the Molecular Cytogenetics Laboratory at Texas A&M University for karyotype analysis; Miyazaki City Phoenix Zoo (Miyazaki, Japan), Kumamoto City Zoological and Botanical Gardens (Kumamoto), Kurume Bird Center (Fukuoka), Hirakawa Zoological Park (Kagoshima), Osaki Peacock Park (Nagasaki) and Nansei Environmental Laboratory Co., Ltd (Okinawa) for their generous supply of fertilized blue peafowl eggs; D. McKim for valuable comments, discussions and proofreading of the paper; and M. Nakakubo, N. Matsubara and T. Seto for their technical assistance. Funding: this work was supported by the Chen Yong Foundation of the Zhongmei Group, the Wu & Jiang Research Fund and the Xia Research Fund: grant nos. NIH/NIGMS R01 GM151373 and NIH/NIGMS R41 GM146516 to Q.-L.Y. and the Revive & Restore Biotechnology for Bird Conservation grants to Q.-L.Y., G.S. and C.L. C.-M.C. and P.W. were supported by grant nos. NIH/NIAMS R01 AR047364 and AR060306 and the research contract no. 005884 between the University of Southern California (USC) and the China Medical University in Taiwan. G.S. was supported by Japan Society for the Promotion of Science grant nos. 18H02452 and 21H02490, the Japan Science and Technology Agency e-ASIA Joint Research Project no. JPMJSC19E5 and the Takeda Science Foundation Research Grant. X.C. was supported by the predoctoral fellowship from the NICHD/USC Joint T32 Training Program in Developmental Biology, Stem Cells and Regeneration, and a Della Martin postdoctoral Fellowship in Mental Illness at Caltech. Z.G. was supported by the California Institute for Regenerative Medicine Predoctoral Training Fellowship in Stem Cell Biology and Tissue Regeneration.

Conflict of Interest

Q.-L.Y., X.C., Z.G., X.T. and X.L. are inventors on a patent (WO2023158627A3) entitled ‘Methods for derivation and propagation of avian pluripotent stem cells and applications thereof’ arising from this work. The other authors declare no competing interests.

Supplemental Material

Supplementary Table 1The list of compounds and growth factors tested for chicken ES cell derivation.

Supplementary Table 2

Lists of proteins and peptides identified by mass-spectrometry analysis of the 50p, 70p and 80p fractions from the 50–100-kDa yolk plasma.

Supplementary Table 3

Summary of representative chimeric embryos generated from avian ES cells.

Supplementary Table 4

Summary of chimeric embryos examined for germline contribution from GFP+ chicken ES cells.

Supplementary Table 5

Primer sequences used in this study.

Supplementary Video 1

Beating colonies emerged from duck, pheasant, and turkey blastodermal cells cultured in OT/2i.

Supplementary Video 2

Contribution of GFP-labeled chicken ES cells to the beating heart of a nonirradiated E4 chicken embryo. Constitutively GFP-expressing chicken ES cells were injected into the subgerminal cavity of a nonirradiated EGK.X-stage chicken embryo and incubated using the surrogate shell system. On day 4, live imaging of green fluorescence was performed.

Supplementary Video 3

Contribution of GFP-labeled chicken ES cells to both somatic and extra-embryonic lineage in a sublethally irradiated E4 chicken embryo. Constitutively GFP-expressing chicken ES cells were injected into the subgerminal cavity of an EGK.X-stage chicken embryo treated with 500 cGy. The embryo was incubated using the surrogate shell system. On day 4, live imaging of green fluorescence spanning both embryonic and extra-embryonic regions was recorded.

Supplementary Video 4

GFP-labeled donor chicken ES cells contribute to blood vessels and circulating cells in a sublethally irradiated E4 chicken embryo. This video features the same embryo shown in Supplementary Video 3. Constitutively GFP-expressing chicken ES cells were injected into the subgerminal cavity of an EGK.X-stage embryo treated with 500 cGy and incubated using the surrogate shell system. On day 4, live imaging of green fluorescence in the extra-embryonic region was recorded.

Supplementary Video 5

GFP-labeled donor quail ES cells contribute to circulating cells in a sublethally irradiated E4 chicken embryo. Constitutively GFP-expressing quail ES cells were injected into the subgerminal cavity of an EGK.X-stage chicken embryo treated with 500 cGy. The embryo was incubated using the surrogate shell system. On day 4, live imaging of green fluorescence in the extra-embryonic region was recorded.

Supplementary Video 6

GFP-labeled donor goose ES cells contribute to blood vessels and circulating cells in a sublethally irradiated E5 chicken embryo. Constitutively GFP-expressing goose ES cells were injected into the subgerminal cavity of an EGK.X-stage chicken embryo treated with 500 cGy. The embryo was incubated using the surrogate shell system. On day 5, live imaging of green fluorescence in the extra-embryonic region was recorded.

Supplementary Video 7

GFP-labeled donor quail ES cells contribute to blood vessels and circulating cells in a sublethally irradiated E8 quail embryo. Constitutively GFP-expressing quail ES cells were injected into the subgerminal cavity of a 500 cGy-treated EGK.X-stage quail embryo. The embryo was subsequently incubated in its original shell. On day 8, a window was opened in the shell, and live imaging of green fluorescence in the extra-embryonic region was recorded.
Supplementary Video 8
Confocal Z-stack of DAZL and DAPI (4,6-diamidino-2-phenylindole) staining in the goose ES cell-derived EB shown in Fig. 6b. Immunofluorescence staining was performed on day-3 EBs derived from goose ES cells, followed by confocal imaging. DAZL is shown in red and DAPI-stained nuclei are shown in blue.

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Related works

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Journal Article: https://rdcu.be/eOP3z (URL)

Funding

National Institute of General Medical Sciences
R01 GM151373
National Institute of General Medical Sciences
R41 GM146516
Revive & Restore
Biotechnology for Bird Conservation grant
National Institute of Arthritis and Musculoskeletal and Skin Diseases
R01 AR047364
National Institute of Arthritis and Musculoskeletal and Skin Diseases
AR060306
California Institute of Technology
Fellowship in Mental Illness
Eunice Kennedy Shriver National Institute of Child Health and Human Development
Joint T32 Training Program in Developmental Biology, Stem Cells and Regeneration

Dates

Available
2025-09-30
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Caltech Custom Metadata

Caltech groups
Tianqiao and Chrissy Chen Institute for Neuroscience
Publication Status
Published