Ectopic expression of lipid homeostasis genes in rare cells of the teleost pituitary gland
Ager-Wick, E.; Maugars, G.; von Krogh, K.; Fontaine, R.; Siddique, K.; Nourizadeh-Lillabadi, R.; Weltzien, F.-A.; Henkel, C.
Show abstract
Directing both organismal homeostasis and physiological adaptation, the pituitary is a key endocrine gland in all vertebrates. It communicates the needs of the organism to different organs by secreting hormones into the bloodstream. Here, we have used the model fish medaka to investigate the developmental dynamics in the pituitary using a comprehensive RNA-seq time series. By linking developmental expression trends to single-cell RNA-seq profiles, we show how the transcriptional activities of cell types change during sexual maturation. One of the most prominent changes is the decline of the non-endocrine folliculo-stellate cell populations, and especially of rare cells expressing genes encoding secreted lipid transport proteins. As these genes are typically associated with the liver, this reveals the existence of unexpected connections between endocrine communication, lipid homeostasis, and sexual maturation.
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