Protease activated receptor 2 and epidermal growth factor receptor are involved in the regulation of human sperm motility / 亚洲男科学杂志(英文版)
Asian Journal of Andrology
;
(6): 690-696, 2007.
Artigo
em Inglês
| WPRIM
| ID: wpr-310464
ABSTRACT
<p><b>AIM</b>To investigate mechanisms of tryptase-induced reduction of sperm motility and explore whether epidermal growth factor receptor (EGF-R) and protease activated receptor 2 (PAR-2)- associated pathways are involved.</p><p><b>METHODS</b>Fresh semen was collected from healthy donors (n = 15). Semen parameters and quality were assessed in accordance with the World Health Organization (WHO) criteria. Swim-up sperm were fixed and subjected to immunocytochemistry and immunoelectronmicroscopy with specific antibodies directed against PAR-2 and EGF-R. Protein extractions from swim-up spermatozoa were analyzed by Western blotting with antibodies for both receptors. Motility of spermatozoa was evaluated by computer-assisted semen analysis.</p><p><b>RESULTS</b>Immunocytochemistry found PAR-2 and EGF-R in approximately 30% of examined human ejaculated spermatozoa. Both receptors were localized in the plasma membrane. Like tryptase, the PAR-2 synthetic agonist SLIGKV reduced sperm motility, and this effect was inhibited by application of two specific EGF-R pathway blockers (AG1478 and PD168393).</p><p><b>CONCLUSION</b>The observed reduction of sperm motility by tryptase through the PAR-2 receptor involves EGF-R pathways.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Oligopeptídeos
/
Farmacologia
/
Fisiologia
/
Quinazolinas
/
Valores de Referência
/
Sêmen
/
Motilidade dos Espermatozoides
/
Espermatozoides
/
Microscopia Imunoeletrônica
/
Tirfostinas
Limite:
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Asian Journal of Andrology
Ano de publicação:
2007
Tipo de documento:
Artigo
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