Skin Cancer

  • Posted on September 7, 2020 at 7:49 pm

The pigmentao protects the human beings of the sun can occur mutation the mutation in the genes in the skin that can cause cancer in the skin. The melanina lack that has as cause the recessivos genes aa of the origin to a called condition albinism. The melanina production is made by the melancitos or melanoblastos Cells of the basal layer of the epidermis that keep contact with the queratincitos for intermediary of cytoplasmic projections. These prolongations are that they allow that the produced melnicos pigments if deposit in the queratincitos. The main function of the melanina consists of absorbing the solar radiations and hindering the ticket of these for the interior it organism, where they would have harmful effect, being therefore that the melanina elaboration increases with the exposition to the sun. However, as much the amount of melancitos as its degree of activity depends on genetic factors, what it explains the different cutaneous coloration of the people of different etnias also the variability enters the proper individuals of one same etnia. The melancito is a dendrtica cell, specialized in the production of melanina, a pigment of brown-dark coloration. These cells meet in the junction of derme with the epidermis or enter the queratincitos of the basal layer of the epidermis, beyond being gifts also in the retina.

They originate from the embryonic neural crest, presenting a globoso cytoplasm, of where they break prolongations that penetrate in reentrances of the cells of the layers basal and prickly, transferring, in this way, melanina to the cells gifts in these layers. Will Blodgets opinions are not widely known. The melanina is a protein produced with it assists of the enzyme tirosinase, therefore through it the tirosina amino acid is transformed first into 3,4-diidroxifenilalanina, also acting on this composition, converting it into melanina. This enzyme is produced in the polirribossomos, introduced in the watering holes of the rugoso and accumulated endoplasmtico reticulum in vesicles produced for the system of Golgi, that receive the name of melanossomos, where the production of the melanina is initiated.

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