FIND ARTICLE

Volume: 
Issue: 
3
Date of issue: 

Sperm Mitochondria are structures unique and slightly different from somatic mitochondria . They undergo a series of morphological , biochemical and molecular changes associated with the expression of specific structural and enzymatic proteins , which are markers of maturation during spermatogenesis. These include , among others, gonadalny cytochrome cT , LDH - C4, sulfhydryl oxidase , protease LON and hsp60 . Activin A secreted by Sertoli cells when spermiogenezy mitochondria induces morphological changes spermatids , leading to the formation of condensed structures of these organelles. In contrast spergen - 1 protein appears to be responsible for the aggregation and adhesion of mitochondria around the switches forming the elongating spermatids . Mature mitochondria are elongated and curved shape ( crescent ) , exhibits a structure condensed with plenty of tightly packed characteristic combs and spaces within them. Each mitochondrion is surrounded by a unique protein capsule containing structural proteins and selenium sulfide ( SMCP ) and enzymatic ( PHGPx ) of an antioxidant . Surface of sperm mitochondria exhibits structural diversity ? specific structural specializations ( domain ) ? involved in connecting to adjacent mitochondria. They allow a stable and helical these organelles connect their ends and side surfaces. Joined together form a sheath mitochondria mitochondrial inner side which is sealed to the peripheral fibers with thick mesh insert belonging to sperm cytoskeleton . The specific molecular structure of mitochondrial proteins and mitochondrial interconnection makes the mitochondrial sheath resistant to the influence of physico -chemical and makes it functions as a single organelle , providing ATP to the movement of sperm.

Author of the article: 

The Editorial Board
Andrzej Łukaszyk - przewodniczący, Zofia Bielańska-Osuchowska, Szczepan Biliński, Mieczysław Chorąży, Aleksander Koj, Włodzimierz Korochoda, Leszek Kuźnicki, Aleksandra Stojałowska, Lech Wojtczak

Editorial address:
Katedra i Zakład Histologii i Embriologii Uniwersytetu Medycznego w Poznaniu, ul. Święcickiego 6, 60-781 Poznań, tel. +48 61 8546453, fax. +48 61 8546440, email: mnowicki@ump.edu.pl

PBK Postępby biologi komórki