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Effect of insulin-like growth factor I on functional parameters of ram cooled-stored spermatozoa

AV. Makarevich, E. Spalekova, L. Olexikova, E. Kubovicova, Z. Hegedusova,

. 2014 ; 22 (3) : 305-13.

Jazyk angličtina Země Anglie, Velká Británie

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc15023654

The aim of the study was to examine the effects of insulin-like growth factor I (IGF-I) on ram sperm traits after hypothermic storage. Sperm ejaculates from Lacaune rams were diluted in a Tris extender, pooled, divided into groups of IGF-I doses tested (0, 10, 100 or 200 ng.ml-1) and stored (0-5°C) for 96 h. IGF-I elevated whole sperm motility as measured by a Computer-assisted Sperm Analyser (CASA) system, by 24 h (10 ng.ml-1) and 48 h (200 ng.ml-1) of storage, and by progressive movement on each day of storage. After 72 h the sperm samples were analysed for plasma membrane integrity (peanut agglutinin-fluorescein isothiocyanate), membrane stability (annexin V-Fluos) and apoptosis (Yo-Pro®-1) using fluorescence microscopy. The addition of IGF-I (at 100 or 200 ng.ml-1) reduced the ratio of sperm with disrupted membranes and the ratio of annexin V-labelled sperm. The ratio of apoptotic sperm was reduced by IGF-I given at 10 or 100 ng.ml-1 compared with control. Sperm fertilizing ability, determined at 48 h by an in vitro fertilization (IVF) test on bovine oocytes, was increased by IGF-I given at 100 ng.ml-1 from 47.0 to 67.7%. In conclusion, IGF-I maintained ram sperm functions following cooling storage and its effects were reflected in sperm fertilizing ability in vitro.

Citace poskytuje Crossref.org

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