Prodigiosin Shields Stem Cells From Hypoxia Damage in Cell Study

Bone marrow-derived mesenchymal stem cells (BMSCs) are a mainstay of regenerative medicine, but they often die quickly after transplantation because implanted tissue is starved of oxygen. A new cell-culture study reports that prodigiosin protected BMSCs from chemically induced hypoxic injury, apparently by acting on HIF-1α/YAP-associated signaling.

Researchers at Zhujiang Hospital, Southern Medical University, cultured BMSCs and confirmed their identity by flow cytometry. To mimic a hypoxic microenvironment, they exposed the cells to cobalt chloride (CoCl2, 100 micromolar for 24 hours), a standard chemical method for inducing hypoxia-like stress in vitro. This exposure reduced cell viability, increased apoptosis, promoted accumulation of reactive oxygen species (ROS), and raised HIF-1α expression.

The hypoxic stress also shifted the cells toward cell death at the protein level: the ratio of phosphorylated YAP to total YAP (p-YAP/YAP) decreased, while the pro-apoptotic proteins Bax and active caspase-3 increased. These markers were measured by Western blot, with apoptosis assessed by Annexin V/PI staining and DAPI staining, ROS by DHE fluorescence, and viability by CCK-8 assay.

When the cells were treated with prodigiosin at 20 nanomolar, the drug alleviated the CoCl2-induced cytotoxicity. Treated cells showed less ROS accumulation, reduced apoptosis, and a partial restoration of the p-YAP/YAP ratio, suggesting that prodigiosin’s protective effect may involve reactivating YAP signaling under hypoxic stress.

To probe the pathway further, the team used two independent interventions. They treated cells with verteporfin (0.5 micromolar), a YAP inhibitor, and in separate experiments knocked down HIF-1α using siRNA. Both interventions reduced hypoxia-induced apoptosis, which the authors interpret as evidence that HIF-1α/YAP-associated signaling participates in BMSC injury under hypoxic stress.

The findings, published in Frontiers in Systems Biology, are strictly preliminary with respect to therapy. The work was conducted entirely in cultured cells exposed to a chemical hypoxia mimic, not in living tissue or patients, and the abstract does not report tests of prodigiosin in animal models or transplantation settings. Statistical analysis used ANOVA or unpaired t-tests with a significance threshold of P < 0.05.

The authors frame the result as a step toward improving stem cell survival in hypoxic regenerative environments, where poor engraftment limits therapeutic efficacy.

For now, the reported result is a measurable protective effect in a cell model: less oxidative stress, fewer apoptotic cells, and partially restored YAP phosphorylation when prodigiosin was present during chemically induced hypoxia.

Subject of Research: Prodigiosin's protective effect on hypoxia-stressed bone marrow-derived mesenchymal stem cells in cell culture

Article Title: Prodigiosin protects bone marrow-derived mesenchymal stem cells from hypoxia-induced apoptosis by modulating HIF-1α/YAP-associated signaling

Article References: Liu, Y., Xu, H., Li, Z., & Zhu, L. (2026). Prodigiosin protects bone marrow-derived mesenchymal stem cells from hypoxia-induced apoptosis by modulating HIF-1α/YAP-associated signaling. Frontiers in Systems Biology, 6, Article 1947639. https://doi.org/10.3389/fsysb.2026.1947639

Image Credits: AI Generated

DOI: 10.3389/fsysb.2026.1947639

Keywords: prodigiosin, mesenchymal stem cells, hypoxia, apoptosis, HIF-1α, YAP, reactive oxygen species, cobalt chloride, verteporfin, regenerative medicine, cell culture, protects