TY - JOUR
T1 - TRPM8 in mouse sperm detects temperature changes and may influence the acrosome reaction
AU - Martinez-Lopez, Pablo
AU - Trevino, Claudia L
AU - de la Vega-Beltran, Jose L
AU - De Blas, Gerardo
AU - Monroy, Esteban
AU - Beltran, Carmen
AU - Orta, Gerardo
AU - Gibbs, Gerard
AU - O'Bryan, Moira Kathleen
AU - Darszon, Alberto
PY - 2011
Y1 - 2011
N2 - Changes in the concentration of intracellular Ca(2+) ([Ca(2+)]i) trigger and/or regulate principal sperm functions during fertilization such as motility, capacitation and the acrosome reaction (AR). Members of the large TRP channel family participate in a variety of Ca(2+)-dependent cell signaling processes. The eight TRPM channel members constitute one of the seven groups belonging to this family. Here we document using RT-PCR experiments the presence of Trpm2, 4, 7 and 8 in mouse spermatogenic cells. Trpm8 transcription is up-regulated after day 30. The localization of TRPM8 protein in mouse sperm was confirmed by immunocytochemistry and Western blots. Patch clamp recordings in testicular mouse sperm revealed TRPM8 agonist (menthol and icilin) activated currents sensitive to TRPM8 inhibitors N-(4-t-Butylphenyl)-4-(3-Chloropyridin-2-yl)tetrahydropyrazine-1(2H)-carbo xamide (BCTC) and capsazepine. These findings are consistent with the presence of functional TRPM8 in mouse sperm. Furthermore, menthol induced a [Ca(2+)]i increase and the AR in these cells, that were inhibited by capsazepine (20 microM) and BCTC (1.6 microM). Notably, the progesterone and ZP-induced AR was significantly (>40 ) inhibited by BCTC and capsazepine, suggesting the possible participation of TRPM8 channels in this reaction. TRPM family members present in sperm could be involved in other important signaling events such as thermotaxis, chemotaxis and mechanosensory transduction.
AB - Changes in the concentration of intracellular Ca(2+) ([Ca(2+)]i) trigger and/or regulate principal sperm functions during fertilization such as motility, capacitation and the acrosome reaction (AR). Members of the large TRP channel family participate in a variety of Ca(2+)-dependent cell signaling processes. The eight TRPM channel members constitute one of the seven groups belonging to this family. Here we document using RT-PCR experiments the presence of Trpm2, 4, 7 and 8 in mouse spermatogenic cells. Trpm8 transcription is up-regulated after day 30. The localization of TRPM8 protein in mouse sperm was confirmed by immunocytochemistry and Western blots. Patch clamp recordings in testicular mouse sperm revealed TRPM8 agonist (menthol and icilin) activated currents sensitive to TRPM8 inhibitors N-(4-t-Butylphenyl)-4-(3-Chloropyridin-2-yl)tetrahydropyrazine-1(2H)-carbo xamide (BCTC) and capsazepine. These findings are consistent with the presence of functional TRPM8 in mouse sperm. Furthermore, menthol induced a [Ca(2+)]i increase and the AR in these cells, that were inhibited by capsazepine (20 microM) and BCTC (1.6 microM). Notably, the progesterone and ZP-induced AR was significantly (>40 ) inhibited by BCTC and capsazepine, suggesting the possible participation of TRPM8 channels in this reaction. TRPM family members present in sperm could be involved in other important signaling events such as thermotaxis, chemotaxis and mechanosensory transduction.
UR - http://onlinelibrary.wiley.com/doi/10.1002/jcp.22493/pdf
U2 - 10.1002/jcp.22493
DO - 10.1002/jcp.22493
M3 - Article
SN - 0021-9541
VL - 226
SP - 1620
EP - 1631
JO - Journal of Cellular Physiology
JF - Journal of Cellular Physiology
IS - 6
ER -