ⓘ Pinealocyte

                                     

ⓘ Pinealocyte

Pinealocytes are the main cells contained in the pineal gland, located behind the third ventricle and between the two hemispheres of the brain. The primary function of the pinealocytes is the secretion of the hormone melatonin, important in the regulation of circadian rhythms. In humans, the suprachiasmatic nucleus of the hypothalamus communicates the message of darkness to the pinealocytes, and as a result, controls the day and night cycle. It has been suggested that pinealocytes are derived from photoreceptor cells. Research has also shown the decline in the number of pinealocytes by way of apoptosis as the age of the organism increases. There are two different types of pinealocytes, type I and type II, which have been classified based on certain properties including shape, presence or absence of infolding of the nuclear envelope, and composition of the cytoplasm.

                                     
  • Muller glia retina Oligodendrocyte Pituicyte posterior pituitary Pinealocyte Bone Osteoblast Osteocyte Cartilage Chondroblast Chondrocyte
  • all cell types within the pineal gland, including melatonin - releasing pinealocytes photoreceptor cells and leftwards migrating parapineal cells, which
  • PACAP. The pineal body consists in humans of a lobular parenchyma of pinealocytes surrounded by connective tissue spaces. The gland s surface is covered
  • serotonin - dependent aspects of human behavior and pituitary function. In the pinealocyte cells of the pineal gland, aralkylamine N - acetyltransferase is involved
  • astrocytes, ganglion cells, blood vessels, and pinealocytes which are the cells of this organ. Pinealocytes are specialized neurons, which are rich in monoaminergic
  • TPH expression is limited to a few specialized tissues: raphe neurons, pinealocytes mast cells, mononuclear leukocytes, beta - cells of the islets of Langerhans
  • vestibular organ receptors, cochlear hair cells, retinal bipolar cells, and pinealocytes The synaptic ribbon is a unique structure at the active zone of the