Project description:We employed a single-cell RNA sequencing (scRNA-seq) approach using the 10x Genomics platform to investigate the transcriptomic landscape of all cellular constituents within the adult carotid body germinal niche. This organ serves as the principal peripheral chemoreceptor in mammals, mediating the detection of hypoxemia. To our knowledge, this study represents the first comprehensive transcriptomic profiling of all cell types residing in this niche, including neural crest-derived progenitor cells and oxygen-sensitive glomus (type I) cells. Furthermore, we analyzed samples obtained from animals maintained under normoxic and hypoxic conditions, enabling comparative analyses that revealed molecular and cellular alterations elicited by hypoxic stimulation.
Project description:The carotid body (CB) is a peripheral chemoreceptor organ that suffers a profound angiogenic and neurogenic process in response to hypoxemia, to contribute to physiological adaptation of the organism. We have previously described a subpopulation of neural crest-derived stem cells residing in the organ. These cells are responsible for hypoxia-induced neurogenesis. Little is known about the molecular mechanisms underlying this neurogenic process.
Project description:The carotid body (CB) is a peripheral chemoreceptor organ that suffers a profound angiogenic and neurogenic process in response to hypoxemia, to contribute to physiological adaptation of the organism. We have previously described a subpopulation of neural crest-derived stem cells residing in the organ. These cells are responsible for hypoxia-induced neurogenesis. Little is known about the molecular mechanisms underlying this neurogenic process. We have used neuronal cell-enriched neurosphere (NS) cultures vs. undifferentiated cell-enriched NS to study molecular pathways involved in the biology of these CB different cell types.
Project description:The carotid body is a peripheral chemoreceptor organ containing a neurogenic niche with stem cells and immature neuronal cells that convert into new neurons (glomus cells) upon activation by hypoxia. We have used microarray to compare the gene expression programs of glomus cells and neuroblasts, both in normoxic and hypoxic (3 days) conditions, to highlight the molecular mechanisms underlying fast neurogenesis
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 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: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.