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Our sense of self, our sense and awareness of a cosmic wholeness, is a central aspect of the human experience. After forming from fetal mouth tissue, the Pineal decides to migrate to the very center of our seat of consciousness - the brain. Another impressive symbolism.
Abstract
Long noncoding RNAs (lncRNAs) play a broad range of biological roles, including regulation of expression of genes and chromosomes. Here, we present evidence that lncRNAs are involved in vertebrate circadian biology. Differential night/day expression of 112 lncRNAs (0.3 to >50 kb) occurs in the rat pineal gland, which is the source of melatonin, the hormone of the night. Approximately one-half of these changes reflect nocturnal increases. Studies of eight lncRNAs with 2- to >100-fold daily rhythms indicate that, in most cases, the change results from neural stimulation from the central circadian oscillator in the suprachiasmatic nucleus (doubling time = 0.5–1.3 h). Light exposure at night rapidly reverses (halving time = 9–32 min) levels of some of these lncRNAs. Organ culture studies indicate that expression of these lncRNAs is regulated by norepinephrine acting through cAMP. These findings point to a dynamic role of lncRNAs in the circadian system.
RNA sequencing
neuroendocrine regulation
differential expression
chronobiology