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Perivitelinski prostor

Perivitelinski prostor
Ljudsja jajna ćelija. Zona pellucida vidi se kao gusti prozirni pojas okružen ćelijama corona radiata. Perivitelinski prostor nalazi se između zona pellucida i membrane oocita.
Anatomska terminologija

Perivitellinski prostor je onaj između zona pellucida i ćelijske membrane nekog oocita ili oplođene jajne ćelije.[1]U sporom bloku do polispermije, korteksne granule, koje se oslobađaju iz jajne ćelije, talože se u perivitelini prostor. Polisaharid koji se oslobađa u granulama uzrokuje da prostor nabrekne, gurajući zonu pellucida dalje od oocita.[1] Hidrolizni enzimi koji oslobađaju granule uzrokuju pojavu zone reakcije, koja uklanja ZP3 ligande iz zone pellucida.[1]

Klinički značaj

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Klinički je perivitelinski prostor relevantan, jer tamo se nalazi polarno tijelo nakon mejoze.

Reference

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  1. ^ a b c Bruce M. Carlson (2004). Human Embryology and Developmental Biology (3rd izd.). Philadelphia, PA: Elsevier/Mosby. str. 34–38.

Vanjski linkovi

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Perivitelinski prostor
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