Prostaglandin E 2 Enhances Aged Hematopoietic Stem Cell Function.

Autor: Patterson AM; Department of Medicine, Division of Hematology/Oncology, Indiana University School of Medicine, 980 West Walnut St, Indianapolis, IN, 46202, USA. anmapatt@iu.edu., Plett PA; Department of Medicine, Division of Hematology/Oncology, Indiana University School of Medicine, 980 West Walnut St, Indianapolis, IN, 46202, USA., Sampson CH; Department of Medicine, Division of Hematology/Oncology, Indiana University School of Medicine, 980 West Walnut St, Indianapolis, IN, 46202, USA., Simpson E; Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.; Department of BioHealth Informatics, School of Informatics and Computing, Indiana University- Purdue University Indianapolis, Indianapolis, IN, 46202, USA., Liu Y; Center for Computational Biology and Bioinformatics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.; Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, 46202, USA., Pelus LM; Department of Medicine, Division of Hematology/Oncology, Indiana University School of Medicine, 980 West Walnut St, Indianapolis, IN, 46202, USA., Orschell CM; Department of Medicine, Division of Hematology/Oncology, Indiana University School of Medicine, 980 West Walnut St, Indianapolis, IN, 46202, USA.
Jazyk: angličtina
Zdroj: Stem cell reviews and reports [Stem Cell Rev Rep] 2021 Oct; Vol. 17 (5), pp. 1840-1854. Date of Electronic Publication: 2021 May 11.
DOI: 10.1007/s12015-021-10177-z
Abstrakt: Aging of hematopoiesis is associated with increased frequency and clonality of hematopoietic stem cells (HSCs), along with functional compromise and myeloid bias, with donor age being a significant variable in survival after HSC transplantation. No clinical methods currently exist to enhance aged HSC function, and little is known regarding how aging affects molecular responses of HSCs to biological stimuli. Exposure of HSCs from young fish, mice, nonhuman primates, and humans to 16,16-dimethyl prostaglandin E 2 (dmPGE 2 ) enhances transplantation, but the effect of dmPGE 2 on aged HSCs is unknown. Here we show that ex vivo pulse of bone marrow cells from young adult (3 mo) and aged (25 mo) mice with dmPGE 2 prior to serial competitive transplantation significantly enhanced long-term repopulation from aged grafts in primary and secondary transplantation (27 % increase in chimerism) to a similar degree as young grafts (21 % increase in chimerism; both p < 0.05). RNA sequencing of phenotypically-isolated HSCs indicated that the molecular responses to dmPGE 2 are similar in young and old, including CREB1 activation and increased cell survival and homeostasis. Common genes within these pathways identified likely key mediators of HSC enhancement by dmPGE 2 and age-related signaling differences. HSC expression of the PGE 2 receptor EP4, implicated in HSC function, increased with age in both mRNA and surface protein. This work suggests that aging does not alter the major dmPGE 2 response pathways in HSCs which mediate enhancement of both young and old HSC function, with significant implications for expanding the therapeutic potential of elderly HSC transplantation.
(© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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