title: Molecular modification of Penaeus monodon sperm in female thelycum and its consequent responses.
abstract: Using Penaeus monodon as the model, we demonstrated the molecular changes and the mechanism of thelycal-dependent sperm modification resulting in an enhanced acrosome reaction (AR) response. Attention was paid to the modification of the sperm plasma membrane which was mediated through an adsorption or removal of sperm peripheral and integral membrane proteins as indicated by the different profiles of these proteins in spermatophore (S) and thelycal (T) sperm. In vitro adsorption of Alexa-488 conjugated T proteins onto the entire S-sperm surface confirmed protein transfer in a time-dependent manner. Specific anchoring of 83 and 140 kDa proteins to sperm peripheral proteins as well as 53/55 and 60 kDa proteins to sperm lipids was demonstrated. Apart from membrane modification, a substantial increase in protein tyrosine phosphorylation was shown to be closely associated with T-dependent sperm modification event. The physiological significance of this sperm modification in enhancing sperm AR response, which required at least 3 days of T residence in order for the sperm to gain a complete AR response, was also elucidated.
authors.affiliation: Department of Anatomy, Mahidol University, Bangkok, Thailand.
authors.forename: Rapeepun
authors.initials: R
authors.lastname: Vanichviriyakit
authors.forename: Hathairat
authors.initials: H
authors.lastname: Kruevaisayawan
authors.forename: Wattana
authors.initials: W
authors.lastname: Weerachatyanukul
authors.forename: Pattira
authors.initials: P
authors.lastname: Tawipreeda
authors.forename: Boonsirm
authors.initials: B
authors.lastname: Withyachumnarnkul
authors.forename: Boonyarath
authors.initials: B
authors.lastname: Pratoomchat
authors.forename: Jittipan
authors.initials: J
authors.lastname: Chavadej
authors.forename: Prasert
authors.initials: P
authors.lastname: Sobhon
mesh_terms: D020101:Acrosome Reaction / Q000502:physiology*; D000818:Animals; D002462:Cell Membrane / Q000187:drug effects / Q000378:metabolism; D005260:Female; D050356:Lipid Metabolism; D008297:Male; D017830:Octoxynol; D033561:Penaeidae / Q000502:physiology*; D010766:Phosphorylation; D011092:Polyethylene Glycols / Q000494:pharmacology; D011506:Proteins / Q000378:metabolism; D012965:Sodium Chloride / Q000378:metabolism; D013089:Spermatocidal Agents / Q000494:pharmacology; D013094:Spermatozoa / Q000187:drug effects / Q000502:physiology*; D014443:Tyrosine / Q000378:metabolism
chemical_list: D011506:Proteins; D013089:Spermatocidal Agents; D011092:Polyethylene Glycols; D014443:Tyrosine; D012965:Sodium Chloride; D017830:Octoxynol; C010615:Nonidet P-40