Generation and characterization of giant panda induced pluripotent stem cells

Application of induced pluripotent stem cells in the conservation of endangered animals

The accelerating biodiversity crisis urgently demands innovative approaches that transcend traditional conservation strategies, which are often constrained by genetic bottlenecks and disease risks. Induced pluripotent stem cells (iPSCs) technology emerges as a transformative solution, enabling non-invasive genetic preservation and multi-pathway species recovery. This review synthesizes advances in reprogramming somatic cells from endangered species into iPSCs through integration-free strategies, such as mRNA, Sendai virus, episomal systems, adenoviruses and chemical induction, thereby reducing genomic instability. We highlight breakthroughs in differentiating iPSCs into functional gametes for assisted reproduction and blastoids formation for embryonic reconstruction, circumventing donor oocyte dependency and genetic homogeneity risks. Despite challenges in lineage specification and epigenetic fidelity, combining iPSC biobanking with ecosystem management enables large-scale genetic rescue. By combining these technologies with ethical frameworks and habitat restoration, the plasticity of cells may be transformed into population resilience, potentially redefining biodiversity conservation.

Wisent Somatic Cells Resist Reprogramming by the PiggyBac Transposon System: A Case Study Highlighting Methodological and Conservation Hurdles

The European wisent (Bison bonasus), an iconic yet genetically vulnerable species, faces ongoing conservation challenges due to a restricted gene pool. Advances in induced pluripotent stem cell (iPSC) technology offer promising prospects for preserving and restoring genetic diversity in endangered species. In this study, we sought to reprogram wisent somatic cells into iPSCs using the PiggyBac transposon system, a non-viral method known for being successfully applied in bovine species. We applied a six-factor reprogramming cocktail (OCT4, SOX2, KLF4, LIN28, c-MYC, NANOG) alongside small-molecule enhancers to fibroblasts isolated from adult wisent tissue. While initial colony formation was observed, the reprogrammed cells exhibited limited proliferation and failed to maintain stable pluripotency, suggesting intrinsic barriers to complete reprogramming. Despite optimizing culture conditions, including hypoxia and extracellular matrix modifications, the reprogramming efficiency remained low. Our findings indicate that wisent somatic cells may require alternative reprogramming strategies, such as new-generation delivery systems and epigenetic modulators, to achieve stable iPSC lines. This study underscores the need for species-specific optimization of reprogramming protocols and highlights the potential of emerging cellular technologies for conservation efforts. Future research integrating advanced reprogramming tools may pave the way for genetic rescue strategies in wisent and other endangered species.