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Staining of sturgeon spermatozoa with trypsin inhibitor from soybean, Alexa Fluor ® 488 conjugate for visualization of sturgeon acrosome
Author(s) -
Psenicka M.,
Cosson J.,
Alavi S. M. H.,
Rodina M.,
Kaspar V.,
Gela D.,
Linhart O.,
Ciereszko A.
Publication year - 2008
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/j.1439-0426.2008.01140.x
Subject(s) - alexa fluor , staining , acrosome , biology , acrosome reaction , sperm , acrosin , human fertilization , semen , microbiology and biotechnology , andrology , anatomy , botany , fluorescence , genetics , medicine , physics , quantum mechanics
Summary Trypsin‐like activity, similar to acrosin, is present in sturgeon spermatozoa and can be a potential target for trypsin inhibitors. The objective of this work was to use a fluorescent soybean trypsin inhibitor (SBTI) conjugate with the Alexa Fluor ® 488 dye for visualization of the sturgeon acrosome. After incubation with SBTI‐Alexa, a strong signal was observed both in the acrosome and midpiece or implantation fossa region. We have also found that SBTI‐Alexa staining can be combined with PI viability test. Detailed examination of staining pattern revealed that SBTI‐Alexa can stain either acrosome or whole sperm. Staining of whole sperm correlated with dead staining ( r 2 = 0.94, P < 0.01). However, in fresh semen most cells (93–97%) were not stained with SBTI‐Alexa, probably due to intact acrosomes. Further studies should test if SBTI‐Alexa can be applied to monitor the acrosome status during the acrosome reaction and cryopreservation.