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OCT4 and NANOG are core transcription factor genes in self-renewal, differentiation, and reprogramming. Here, we generated an OCT4-EGFP, NANOG-tdTomato dual reporter hiPSC line, KKUi001-A, on the basis of human induced pluripotent stem cells using CRISPR/Cas9 technology. EGFP and tdTomato reporter were inserted into before the stop codon of OCT4 and NANOG, respectively. Simultaneous expression of EGFP and tdTomato was observed when expression of OCT4 and NANOG was changed during differentiation and reprogramming. KKUi001-A hiPSC line will be a useful tool to find initial time point of OCT4 and NANOG expression during reprogramming process and to screen small molecules that promote reprogramming.
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http://dx.doi.org/10.1016/j.scr.2020.101943 | DOI Listing |
Drug Deliv Transl Res
September 2025
Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, 300044, Taiwan.
The three-dimensional (3D) culture system has emerged as an indispensable platform for modulating stem cell function in biomedicine, drug screening, and cell therapy. Despite a few studies confirming the functionality of 3D culture, the molecular factors underlying this process remain obscure. Here, we have utilized a hanging drop method to generate 3D spheroid-derived mesenchymal stem cells (3D MSCs) and compared them to conventionally 2D-cultured MSCs.
View Article and Find Full Text PDFCryobiology
September 2025
Department of Stomatology, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai, 519000, Guangdong Province, China. Electronic address:
This study explored the protective effects of metformin on human dental pulp stem cells (hDPSCs) during cryopreservation. hDPSCs were isolated from extracted third molars and treated with varying concentrations of metformin to identify the optimal dose for cryoprotection. Among the tested concentrations, 800 μM was found to effectively reduce reactive oxygen species without compromising cell viability.
View Article and Find Full Text PDFBiomedicines
August 2025
Department of Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
Stem cells are essential for tissue maintenance, repair, and regeneration, yet their dysregulation gives rise to cancer stem cells (CSCs), which drive tumor progression, metastasis, and therapy resistance. Despite extensive research on stemness and oncogenesis, a critical gap remains in our understanding of how the transcriptomic landscapes of normal somatic stem cells (SSCs) diverge from those of CSCs to enable malignancy. This review synthesizes current knowledge of the key signaling pathways (Wnt, Notch, Hedgehog, TGF-β), transcription factors (Oct4, Sox2, Nanog, c-Myc, YAP/TAZ), and epigenetic mechanisms (chromatin remodeling, DNA methylation, microRNA regulation) that govern stemness in SSCs and are hijacked or dysregulated in CSCs.
View Article and Find Full Text PDFCurr Issues Mol Biol
August 2025
State Key Laboratory of Reproductive Regulation & Breeding of Grassland Livestock, School of Life Sciences, Inner Mongolia University, Hohhot 010070, China.
As an interspecies hybrid inheriting genetic material from horse and donkey lineages, mules provide a unique model for studying allele-specific regulatory dynamics. Here, we isolated adult fibroblasts (AFs) and placental fibroblasts (PFs) from mule tissues and reprogrammed them into induced pluripotent stem cells (iPSCs). Intriguingly, placental fibroblast-derived iPSCs (mpiPSCs) exhibited reduced reprogramming efficiency compared to adult fibroblast-derived iPSCs (maiPSCs).
View Article and Find Full Text PDFIndian J Med Res
June 2025
Department of Oral Anatomy, Post Graduate Institute of Dental Sciences, Rohtak, Haryana, India.
Background & objectives Cancer stem cells influence aggressive biology, metastasis, recurrence, and treatment resistance in various malignancies. The transcription factors SRY-box transcription factor 2 (SOX2), Octamer-binding transcription factor 4 (OCT4), and Homeobox protein NANOG (NANOG) are prime controllers of the signalling circuit required for embryonic stem cell pluripotency. Salivary gland tumours exhibit diverse biological and clinical behaviours ranging from a benign, innocuous nature to highly aggressive tumours, with a great tendency for recurrence, and poor prognosis.
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