title: Altered micro-ribonucleic acid expression profiles of extracellular microvesicles in the seminal plasma of patients with oligoasthenozoospermia.
abstract: OBJECTIVE
  To determine whether microRNA (miRNA) expression profile is different in extracellular microvesicles collected from seminal plasma of men with oligoasthenozoospermia, to gain further insight into molecular mechanisms underlying male infertility.
  
  
  METHODS
  Microarray with quantitative real-time polymerase chain reaction validation and Western blot analysis confirmation.
  
  
  METHODS
  University research and clinical institutes.
  
  
  METHODS
  A total of 24 men, including 12 oligoasthenozoospermic subfertile men and 12 normozoospermic men.
  
  
  METHODS
  None.
  
  
  METHODS
  Statistically significant altered miRNA expression profiles in oligoasthenozoospermic subfertile men compared with normozoospermic fertile men.
  
  
  RESULTS
  Extracellular microvesicles including exosomes were isolated from seminal plasma by ultracentrifugation. Presence of exosome-specific proteins was confirmed by Western blotting. In the extracellular microvesicles, we analyzed 1,205 miRNAs by microarray and identified 36 miRNAs with altered expression levels in oligoasthenozoospermic compared with normozoospermic fertile men. Seven miRNAs were overexpressed and 29 miRNAs were underexpressed in oligoasthenozoospermic men. Using quantitative real-time polymerase chain reaction as an independent method, we confirmed the significantly higher expression levels of miR-765 and miR-1275 and the significantly lower expression level of miR-15a in oligoasthenozoospermic subfertile men as compared with the normozoospermic men.
  
  
  CONCLUSIONS
  We identified altered expression levels of miRNAs in extracellular microvesicles from seminal plasma as part of the molecular events in the male genital tract. These miRNAs may help to understand the molecular mechanisms underlying male infertility.
authors.affiliation: Department of Human Genetics, Saarland University, Homburg/Saar, Germany. Electronic address: masood@daad-alumni.de.
authors.forename: Masood
authors.initials: M
authors.lastname: Abu-Halima
authors.affiliation: Department of Human Genetics, Saarland University, Homburg/Saar, Germany.
authors.forename: Nicole
authors.initials: N
authors.lastname: Ludwig
authors.affiliation: Department of Human Genetics, Saarland University, Homburg/Saar, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Hart
authors.affiliation: Department of Human Genetics, Saarland University, Homburg/Saar, Germany.
authors.forename: Petra
authors.initials: P
authors.lastname: Leidinger
authors.affiliation: Department of Clinical Bioinformatics, Saarland University, Saarbruecken, Germany.
authors.forename: Christina
authors.initials: C
authors.lastname: Backes
authors.affiliation: Department of Clinical Bioinformatics, Saarland University, Saarbruecken, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Keller
authors.affiliation: Department of Obstetrics and Gynecology, IVF and Andrology Laboratory, Saarland University, Homburg/Saar, Germany.
authors.forename: Mohamad
authors.initials: M
authors.lastname: Hammadeh
authors.affiliation: Department of Human Genetics, Saarland University, Homburg/Saar, Germany.
authors.forename: Eckart
authors.initials: E
authors.lastname: Meese
mesh_terms: D000328:Adult; D053627:Asthenozoospermia / Q000175:diagnosis / Q000235:genetics* / Q000503:physiopathology; D015153:Blotting, Western; D016022:Case-Control Studies; D055252:Cell-Derived Microparticles / Q000235:genetics*; D055354:Exosomes / Q000235:genetics*; D005298:Fertility / Q000235:genetics*; D020869:Gene Expression Profiling / Q000379:methods; D053263:Gene Regulatory Networks; D005819:Genetic Markers; D020022:Genetic Predisposition to Disease; D005858:Germany; D006801:Humans; D008297:Male; D035683:MicroRNAs / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis; D009845:Oligospermia / Q000175:diagnosis / Q000235:genetics*; D010641:Phenotype; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012661:Semen / Q000737:chemistry*; D059467:Transcriptome; D055815:Young Adult
chemical_list: D005819:Genetic Markers; D035683:MicroRNAs
keywords: Exosomes; male infertility; microRNA; seminal plasma; spermatogenesis