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Transcriptomic reprograming during the involution of brown adipose tissue in rabbits

ABSTRACT: Transcriptomic reprograming during the involution of brown adipose tissue in rabbits

PROVIDER: PRJNA626356 | ENA |

REPOSITORIES: ENA

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Transcriptomic reprograming during the involution of brown adipose tissue in rabbits

Project description:Brown adipose tissue (BAT) in rabbits undergoes rapid involution, i.e. transforming to white adipose tissue (WAT), similarly to what happens in humans. We aim to profile the transcriptomic changes of total BAT and the stromal vascular fraction (SVF) that contains adipocyte progenitors at the global and single-cell levels.

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Aging Induced Syntaxin 4 Deficiency Mediates Brown Adipose Tissue Pyroptosis and Thermogenic Dysfunction

Project description:Aging, chronic high fat diet feeding and housing at thermoneutrality induces brown adipose tissue (BAT) involution, a process characterized by reduction of BAT mass and function with increased lipid droplet size. Syntaxin 4 (STX4) was identified as a healthy longevity gene, in contrast endogenous STX4 protein levels in BAT declined in aged mice resulting in pyroptotic activation of caspase 1/4 signaling pathway. Single nuclei RNA sequencing of aged mice identified a specific brown adipocyte population of UCP1low cells that were Stx4 low and pyroptotic. Similarly, UCP1Stx4KO mice led to age-dependent loss of brown adipose tissue mass concomitant with increased pyroptosis whereas restoring STX4 expression protected against pyroptosis and decline in thermogenic activity. Moreover, STX4 deficiency reduced oxidative phosphorylation, glucose uptake and glycolysis leading to reduced ATP levels, a known signal for pyroptosis. All these data demonstrate a new model of rapid brown adipocyte involution and that physiologic aging and BAT involution results from pyroptotic signaling activation.

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Comparison of white adipose tissue and bone marrow adipose tissue from New Zealand White rabbits

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Prdm16 Knockout Brown Adipose Tissue

Project description:Gene expression profile from brown adipose tissues of Prdm16 knockout and wile type mice. Prdm16 is a transcription factor that regulates the thermogenic gene program in brown and beige adipocytes. However, whether Prdm16 is required for the development or physiological function of brown adipose tissue (BAT) in vivo has been unclear. By analyzing mice that selectively lacked Prdm16 in the brown adipose lineage, we found that Prdm16 was dispensable for embryonic BAT development. Brown adipose tissues were collected from Prdm16 knockout and wiletype mice with 4 biological replicates per condition. Experiment was done in two separate batch for 6-week-old and 11-month-old. Extracted RNA was hybridized to Agilent two-color arrays.

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