Intercellular mitochondria transfer is a biological phenomenon implicated in diverse biological processes. However, the physiological role of this phenomenon remains understudied between erythroblasts and their erythroblastic island (EBI) macrophage niche. To gain further insights into the mitochondria transfer functions, we infused EBI macrophages in vivo into mice subjected to different modes of anemic stresses. Interestingly, we observed the occurrence of mitochondria transfer events from the infused EBI macrophages to early stages of erythroblasts coupled with enhanced erythroid recovery. Single-cell RNA-sequencing analysis on erythroblasts receiving exogenous mitochondria revealed a subset of highly proliferative and metabolically active erythroid populations marked by high expression of CD47. Furthermore, CD47 or Sirpα blockade leads to a decline in both the occurrence of mitochondria transfer events and their mediated erythroid recovery. Hence, these data indicate a significant role of mitochondria transfer in the enhancement of erythroid recovery from stress through the alteration of the bioenergetic profiles via CD47–Sirpα interaction in the early stages of erythroblasts.
Mitochondria transfer mediates stress erythropoiesis by altering the bioenergetic profiles of early erythroblasts through CD47
Disclosures: D.Q. Tan reported personal fees from Miltenyi Biotec outside the submitted work. No other disclosures were reported.
- Award Id(s): NMRC/STaR 18 may-0004,OFYIRG19may-0009
- Award Id(s): 26221309
- Views Icon Views
- Share Icon Share
- Search Site
Chong Yang, Rui Yokomori, Lee Hui Chua, Shi Hao Tan, Darren Qiancheng Tan, Kenichi Miharada, Takaomi Sanda, Toshio Suda; Mitochondria transfer mediates stress erythropoiesis by altering the bioenergetic profiles of early erythroblasts through CD47. J Exp Med 5 December 2022; 219 (12): e20220685. doi: https://doi.org/10.1084/jem.20220685
Download citation file: