西亚试剂：Biomarker system for studying muscle, stem cells, and cance

发布时间：2026-02-21

Biomarker system for studying muscle, stem cells, and cancer in vivo

Koichi Nishijo, Tohru Hosoyama, Christopher R. R. Bjornson, Beverly S. Schaffer, Suresh I. Prajapati, Ali N. Bahadur, Mark S. Hansen, Mary C. Blandford, Amanda T. McCleish, Brian P. Rubin, Jonathan A. Epstein, Thomas A. Rando, Mario R. Capecchi, and Charles Keller

Bioluminescent reporter genes are sensitive in situ tools for following disease progression in preclinical models, albeit they are subject to scattering and absorption in deep tissues. We have generated a bicistronic Cre/LoxP reporter mouse line that pairs the expression of firefly luciferase with quantifiable expression of a human placental alkaline phosphatase that is secreted into the serum (SeAP). With the use of this dual-modality bioreporter with a novel, inducible Pax7-CreER line for tracking muscle satellite cells, we demonstrate the longitudinal kinetics of muscle stem cell turnover, accounting for a doubling of the signal from satellite cell and progeny every 3.93 wk in the transition from adolescence to early adulthood. We also show that this dual-modality bioreporter can be incorporated in preclinical cancer models, whereby SeAP activity is reflective of tumor burden. Thus, this dual bioreporter permits both spatial localization and accurate quantification of biological processes in vivo even when the tissue of interest is deep within the animal.—Nishijo, K., Hosoyama, T., Bjornson, C. R. R., Schaffer, B. S., Prajapati, S. I., Bahadur, A. N., Hansen, M. S., Blandford, M. C., McCleish, A. T., Rubin, B. P., Epstein, J. A., Rando, T. A., Capecchi, M. R., Keller, C. Biomarker system for studying muscle, stem cells, and cancer in vivo.

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