Spermatozoa - Enzymology
Research News and Information

Monday, March 22, 2010

Calpain inhibitors prevent p38 MAPK activation and germ cell apoptosis after heat stress in pubertal rat testes.

30 Oct 2009 Testicular injuries like torsion or cryptorchidism can cause massive germ cell death, which could have great impact on male reproductive health. In addition, it has been proposed that modern life style, in the form of underwear or sedentary work ... Read more...

Correlation between neutral alpha-glucosidase activity and sperm DNA fragmentation.

29 Sep 2009 To evaluate the association between neutral alpha-glucosidase (NAG) activity and sperm DNA fragmentation (DFI), ejaculates from 24 men undergoing evaluation for sperm DNA damage as a part of infertility assessment were analysed. The mean +/- SD and ... Read more...

A new role of anandamide in human sperm: focus on metabolism.

29 Sep 2009 The endocannabinoid system and the presence of CB1 receptor (CB1-R) target of the anandamide were identified in human sperm, however the anandamide action in this context needs to be further elucidated. At this purpose we analyzed the effects of ... Read more...

Latest indexed articles for 'Spermatozoa - Enzymology'

These are the very latest articles for this heading:

• Calpain inhibitors prevent p38 MAPK activation and germ cell apoptosis after heat stress in pubertal rat testes. 30 Oct 2009
• Correlation between neutral alpha-glucosidase activity and sperm DNA fragmentation. 29 Sep 2009
• A new role of anandamide in human sperm: focus on metabolism. 29 Sep 2009
• Mammalian sperm quality and aromatase expression. 30 Jul 2009
• Sperm ecto-protein kinase and its protein substrate: novel regulators of membrane fusion during acrosome reaction. 30 Jul 2009
• Switches in 6-phosphofructo-2-kinase isoenzyme expression during rat sperm maturation. 8 Jul 2009
• Structure of insoluble rat sperm glyceraldehyde-3-phosphate dehydrogenase (GAPDH) via heterotetramer formation with Escherichia coli GAPDH reveals target for contraceptive design. 17 Jun 2009
• Dephosphorylation of major sperm protein (MSP) fiber protein 3 by protein phosphatase 2A during cell body retraction in the MSP-based amoeboid motility of Ascaris sperm. 18 May 2009
• [Function of aurora kinase C (AURKC) in human reproduction] 15 May 2009
• Phospholipid hydroperoxide glutathione peroxidase in bull spermatozoa provides a unique marker in the quest for semen quality analysis. Apr 2009
• Effects of liquid preservation of sperm on their ability to activate oocytes and initiate preimplantational development after intracytoplasmic sperm injection in the pig. 23 Mar 2009
• PP1gamma2 and PPP1R11 are parts of a multimeric complex in developing testicular germ cells in which their steady state levels are reciprocally related. 18 Mar 2009
• Negative effects of serum p,p'-DDE on sperm parameters and modification by genetic polymorphisms. 18 Mar 2009
• Calyculin A-sensitive protein phosphatases are involved in maintenance of progressive movement in mouse spermatozoa in vitro by suppression of autophosphorylation of protein kinase A. 14 Mar 2009
• Control of superoxide and nitric oxide formation during human sperm capacitation. 2 Mar 2009
• Sperm-surface ATP in boar spermatozoa is required for fertilization: relevance to sperm proteasomal function. 27 Feb 2009
• Activity of alpha- and beta-mannosidases in semen and reproductive organs of the drake. 27 Feb 2009
• [A procedure for determination of acid mannosidase activities in biological fluids] 27 Feb 2009
• Selenium requirements are higher for glutathione peroxidase-1 mRNA than gpx1 activity in rat testis. 18 Feb 2009
• Abnormal DNA methyltransferase expression in mouse germline stem cells results in spermatogenic defects. 16 Feb 2009

See a longer list of these articles.

Technical information about 'Spermatozoa'

Definition: Mature male germ cells derived from SPERMATIDS. As spermatids move toward the lumen of the SEMINIFEROUS TUBULES, they undergo extensive structural changes including the loss of cytoplasm, condensation of CHROMATIN into the SPERM HEAD, formation of the ACROSOME cap, the SPERM MIDPIECE and the SPERM TAIL that provides motility.

Descriptor UI: D013094

Alternative terms: Spermatozoa; Spermatozoon; Sperm; Y-Chromosome-Bearing Sperm; Sperm, Y-Chromosome-Bearing; Sperms, Y-Chromosome-Bearing; Y Chromosome Bearing Sperm; Y-Chromosome-Bearing Sperms; Y-Bearing Sperm; Sperm, Y-Bearing; Sperms, Y-Bearing; Y Bearing Sperm; Y-Bearing Sperms; X-Chromosome-Bearing Sperm; Sperm, X-Chromosome-Bearing; Sperms, X-Chromosome-Bearing; X Chromosome Bearing Sperm; X-Chromosome-Bearing Sperms; X-Bearing Sperm; Sperm, X-Bearing; Sperms, X-Bearing; X Bearing Sperm; X-Bearing Sperms;

Related Mesh Headings: Antispermatogenic Agents; Oligospermia; Sperm Banks; Spermatocidal Agents;

Allowable Qualifiers: classification; cytology; drug effects; enzymology; immunology; metabolism; microbiology; parasitology; pathology; physiology; radiation effects; radiography; radionuclide imaging; secretion; transplantation; ultrastructure; ultrasonography; chemistry; virology; abnormalities; growth & development;

Tree Number: A05.360.490.890; A11.497.760;

History Note: 1963; for X-BEARING SPERM use X CHROMOSOME 1980-2005; for Y-BEARING SPERM use Y CHROMOSOME 1980-2005

Technical Notes: polyspermia & polyspermy = SPERMATOZOA if excessive sperm or = FERTILIZATION if fertilization of ovum by more than one sperm; sperm donors: coordinate SPERMATOZOA (IM) + TISSUE DONORS (IM); consider also INSEMINATION, ARTIFICIAL, HOMOLOGOUS (husband)(IM) or INSEMINATION, ARTIFICIAL, HETEROLOGOUS (non-husband)(IM) if pertinent but note SPERM BANKS is available; SPERM PRESERVATION is available; HEMOSPERMIA is available