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For the August Journal Club, we took a look at a new paper that shows inhibiting TGFβ can boost liver regeneration [1]. We also discussed another related paper from 2015 by Conboy et al. which showed regeneration in aged mice was possible if TGFβ was inhibited [2]. Taken together, the two papers both confirm that systemic inflammatory signaling holds back tissue regeneration and if we can remove those signals we may potentially be able to regenerate organs and tissue in aged people in the future.

Literature

[1] Bird, T. G., Müller, M., Boulter, L., Vincent, D. F., Ridgway, R. A., Lopez-Guadamillas, E., … & Ferreira-Gonzalez, S. (2018). TGFβ inhibition restores a regenerative response in acute liver injury by suppressing paracrine senescence. Science translational medicine10(454), eaan1230.

[2] Yousef, H., Conboy, M. J., Morgenthaler, A., Schlesinger, C., Bugaj, L., Paliwal, P., … & Schaffer, D. (2015). Systemic attenuation of the TGF-β pathway by a single drug simultaneously rejuvenates hippocampal neurogenesis and myogenesis in the same old mammal. Oncotarget6(14), 11959.

About the author

Oliver Medvedik

Oliver Medvedik, Co-founder of Genspace citizen science laboratory in Brooklyn NY, earned his Ph.D. at Harvard Medical School in the Biomedical and Biological Sciences program. As part of his doctoral work he has used single-celled budding yeast as a model system to map the genetic pathways that underlie the processes of aging in more complex organisms, such as humans. Prior to arriving in Boston for his doctoral studies, he has lived most of his life in New York City. He obtained his bachelor’s degree in biology from Hunter College, City University of New York. Since graduating from Harvard, he has worked as a biotechnology consultant, taught molecular biology to numerous undergraduates at Harvard University and mentored two of Harvard’s teams for the international genetically engineered machines competition (IGEM) held annually at M.I.T.
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