Document Detail

Light, polarizing, and transmission electron microscopy: Three methods for the evaluation of sperm quality.
MedLine Citation:
PMID:  23043672     Owner:  NLM     Status:  Publisher    
Semen from 33 patients were evaluated by light microscopy (LM) obtaining sperm concentration, percent motility, percentage of sperm with normal morphology (PAP staining), and percentage of dead sperm (Eosin Y stained). The samples were observed by polarizing microscopy (PM), that evaluates sperm morphology and the viability by birefringence of organelles, and it provides a PM index (percentage of birefringent, viable, motile sperm) and a percentage of dead, non-birefringent sperm. Sperm were processed for transmission electron microscopy (TEM) and TEM data were elaborated with a mathematical formula able to provide a fertility index (FI, number of sperm free of structural defects) and percentages of sperm immaturity and necrosis (dead sperm). To test the reliability of these techniques, the values of normal acrosome, nucleus, midpiece, and tail and the presence of cytoplasmic residues obtained with the three methods were compared. With the exception of cytoplasmic residues (P = 0.40), significant differences in the evaluation of each organelle were observed and TEM analysis resulted as the most stringent screening. In addition, relationships among relevant sperm variables were investigated. Motility showed positive correlations with the percentage of normal tail, midpiece, and PM index (P < 0.01), but it exhibited negative correlations with indices of sperm death (non-birefringent sperm: P < 0.05; percentage of eosin Y stained sperm: P < 0.05; necrosis: P < 0.01), which were positively correlated with each other (P < 0.01). Positive correlations were found between indices expressing normal sperm morphology: FI with PM index (P < 0.01) and with the percentage of normal sperm (PAP staining) (P < 0.01), which in turn were correlated with the PM index (P < 0.001). Sperm immaturity showed positive correlations (P < 0.01) with the presence of cytoplasmic residues detected with the three methods. In conclusion, LM, PM, and TEM are reliable techniques in evaluating sperm quality. PM appears to offer several advantages 'midway' between LM and TEM and it should be considered in sperm analysis.
Giulia Collodel; Francesca Iacoponi; Lucia Mazzi; Gaia Terzuoli; Nicola Antonio Pascarelli; Elena Moretti
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-8
Journal Detail:
Title:  Systems biology in reproductive medicine     Volume:  -     ISSN:  1939-6376     ISO Abbreviation:  Syst Biol Reprod Med     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101464963     Medline TA:  Syst Biol Reprod Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Biomedical Sciences, Applied Biology Section, Interdepartmental Centre for Research and Therapy of Male Infertility , University of Siena , Siena , Italy.
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