•  

Deficient human β-defensin 1 underlies male infertility associated with poor sperm motility and genital tract infection (Aug 2014)

science
Title:
Deficient human β-defensin 1 underlies male infertility associated with poor sperm motility and genital tract infection
Journal:
Sci Transl Med. 2014 Aug 13;6(249):249ra108
Author(s):
Diao R, Fok KL, Chen H, Yu MK, Duan Y, Chung CM, Li Z, Wu H, Li Z, Zhang H, Ji Z, Zhen W, Ng CF, Gui Y, Cai Z, Chan HC.
 

 

Short description:
Link to the journal
 

 

Abstract taken from PubMed

Abstract:
Genital tract infection and reduced sperm motility are considered two pivotal etiological factors for male infertility associated with leukocytospermia and asthenozoospermia, respectively. We demonstrate that the amount of human β-defensin 1 (DEFB1) in sperm from infertile men exhibiting either leukocytospermia or asthenozoospermia, both of which are associated with reduced motility and reduced bactericidal activity in sperm, is much lower compared to that in normal fertile sperm. Interference with DEFB1 function also decreases both motility and bactericidal activity in normal sperm, whereas treatment with recombinant DEFB1 markedly restores DEFB1 expression, bactericidal activity, sperm quality, and egg-penetrating ability in sperm from both asthenozoospermia and leukocytospermia patients. DEFB1 interacts with chemokine receptor type 6 (CCR6) in sperm and triggers Ca(2+) mobilization, which is important for sperm motility. Interference with CCR6 function also reduces motility and bactericidal activity of normal sperm. The present finding explains a common defect in male infertility associated with both asthenozoospermia and leukocytospermia, indicating a dual role of DEFB1 in defending male fertility. These results also suggest that the expression of DEFB1 and CCR6 may have diagnostic potential and that treatment of defective sperm with recombinant DEFB1 protein may be a feasible therapeutic approach for male infertility associated with poor sperm motility and genital tract infection.
Link to the paper on PubMed
Comment in:
 




IVF-Worldwide.com endeavors to ensure that the information in this article is accurate,reliable and up to date. However, the information is provided "as is" without warranty of any kind. IVF-Worldwide does not accept any responsibility or liability for the accuracy,content, completeness, legality, or reliability of the information contained in this article.
IVF-Worldwide.com is not responsible for the content of other websites linked to or referenced from this website. The website does not endorse the information, content,presentation or accuracy of such other websites and does not make any warranty,express or implied, regarding them.