Direct Reprogramming of Human Primordial Germ Cells into Induced Pluripotent Stem Cells: Efficient Generation of
Faith A Bazley1, Cyndi F Liu2,3, Xuan Yuan4
11 Department of Biomedical Engineering, The Johns Hopkins University School of Medicine , Baltimore, Maryland.
Stem Cells and Development
|July 9, 2015
Summary
Primordial germ cells (PGCs) can be reprogrammed into induced pluripotent stem cells (iPSCs) using SOX2 and OCT4. This novel method offers an efficient model for studying pluripotency regulation.
Area of Science:
- Stem cell biology
- Reproductive biology
- Developmental biology
Background:
- Primordial germ cells (PGCs) share pluripotency factors with embryonic stem cells (ESCs).
- PGCs offer a potential model for studying somatic cell reprogramming into induced pluripotent stem cells (iPSCs).
Purpose of the Study:
- To establish a novel model for generating iPSCs from PGCs.
- To investigate the regulatory mechanisms of pluripotency using PGC reprogramming.
Main Methods:
- Transfection of PGCs with SOX2 and OCT4 using integrative lentiviral vectors.
- Utilizing non-integrative approaches for iPSC generation.
- Assessing pluripotency induction efficiency and molecular characterization.
Main Results:
- SOX2 and OCT4 co-transfection induced PGCs to a pluripotent state with 1.71% efficiency.
- Addition of C-MYC increased efficiency to 2.33%; LIF combined with C-MYC further enhanced efficiency.
- Generated PGC-iPSCs exhibited ESC-like morphology, molecular profiles, and differentiated into three germ layers in vitro, forming teratomas in vivo.
- Derived PGC-iPSC lines were karyotypically stable and showed superior derivation efficiency and survival compared to embryonic germ cells (EGCs).
Conclusions:
- PGCs can be efficiently reprogrammed into iPSCs using defined factors (SOX2, OCT4, C-MYC).
- This PGC-derived iPSC model is valuable for studying pluripotency regulation.
- The method demonstrates improved efficiency and stability over existing EGC-based models.
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