Project description:Acute O2 sensing is a fundamental property of cells in the peripheral chemoreceptors, e.g. glomus cells in the carotid body (CB) and chromaffin cells in the adrenal medulla (AM), and is necessary for adaptation to hypoxia. The mechanisms underlying the detection of changes in O2 tension by these cells are still poorly understood. Recently, we suggested that CB glomus cells have specific metabolic features that favour their sensitivity to hypoxia (Fernandez-Aguera et al, 2015, Cell Metab.). To investigate the metabolic profile characteristic of acute O2-sensing cells, we used adult mice to compare the transcriptomes of three organs derived from common sympathoadrenal progenitors, but exhibiting variable responsiveness to acute hypoxia: CB and AM which are O2-sensitive (CB > AM) and superior cervical ganglion (SCG), which are practically O2-insensitive. Our data support the concept that responsiveness to acute hypoxia depends on a “signature metabolic profile” in peripheral chemoreceptor cells.
Project description:The carotid body is a chemoreceptor that senses decreases in blood oxygen to increase breathing in hypoxia. To look for candidate oxygen sensors in the carotid body, we compared the gene expression of the carotid body to the adrenal medulla, a similar tissue that does not have oxygen sensitivity in adults. For each sample, we pooled 18 carotid bodies and 10 adrenal medullas from 10 adult mice.
Project description:The carotid body is a chemoreceptor that senses decreases in blood oxygen to increase breathing in hypoxia. To look for candidate oxygen sensors in the carotid body, we compared the gene expression of the carotid body to the adrenal medulla, a similar tissue that does not have oxygen sensitivity in adults. For each sample, we pooled 18 carotid bodies or 10 adrenal medullas from 10 adult mice. Group numbers designate the same cohort of animals.
Project description:Bulk RNA sequencing of carotid body (CB) and superior cervical ganglion (SCG) tissues from sheep at four developmental stages: fetal day 120, fetal day 145 (term), post-natal day 15, and adult. Three biological replicates were collected per tissue per stage (one d145 SCG sample was excluded for poor RNA quality and low sympathetic-marker expression in the analysis). The study aimed to identify CB-specific, developmentally regulated gene expression changes correlating with the peri-natal maturation of oxygen chemosensitivity.
Project description:The carotid body is a chemoreceptor that senses decreases in blood oxygen to increase breathing in hypoxia. To look for candidate oxygen sensors in the carotid body, we compared the gene expression of the carotid body to the adrenal medulla, a similar tissue that does not have oxygen sensitivity in adults.
Project description:The carotid body is a chemoreceptor that senses decreases in blood oxygen to increase breathing in hypoxia. To look for candidate oxygen sensors in the carotid body, we compared the gene expression of the carotid body to the adrenal medulla, a similar tissue that does not have oxygen sensitivity in adults.
Project description:The mRNA abundance in the wild-type or Phd2 knockout carotid body and adrenal medulla of mice was analysed by RNA-Seq. For this purpose, mice with tyrosine hydroxylase-restricted inactivation of Phd2 were generated. For the preparation of a single RNA-Seq library, RNA from 10 carotid bodies or adrenal medullas from 5 mice was pooled.
