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- W2685108722 abstract "The prostate is a gland whose secretions contribute to the seminal fluids ejaculated upon activation of autonomic sympathetic nerves. In elder males, the prostate undergoes an increase in stroma mass and myogenic tone, leading to benign prostatic hyperplasia that occludes the proximal urethra and the presentation of various lower urinary tract symptoms that decrease their quality of life. This review summarises the role of prostatic interstitial cells (PICs) in the generation of the spontaneous tone in the prostate. It presents current knowledge of the role of Ca2+ plays in PIC pacemaking, as well as the mechanisms by which this spontaneous activity triggers slow wave generation and stromal contraction. PICs display a small T-type Ca2+ current (ICaT) and a large L-type Ca2+ current (ICaL). In contrast to other interstitial cells in the urinary and gastrointestinal tracts, spontaneous Ca2+ signalling in PICs is uniquely dependent on Ca2+ influx through ICaL channels. A model of prostatic pacemaking is presented describing how ICaL can be triggered by an initial membrane depolarization evoked upon the selective opening of Ca2+-activated Cl– channels by Ca2+ flowing only through ICaT channels. The resulting current flow through ICaL results in release of Ca2+ from internal stores and the summation of Cl–-selective spontaneous transient depolarizations (STDs) to form pacemaker potentials that propagate passively into the prostatic stroma to evoke regenerative action potentials and excitation-contraction coupling." @default.
- W2685108722 created "2017-06-30" @default.
- W2685108722 creator A5006604957 @default.
- W2685108722 creator A5090151741 @default.
- W2685108722 date "2017-01-01" @default.
- W2685108722 modified "2023-09-25" @default.
- W2685108722 title "Role of prostatic interstitial cells in prostate motility" @default.
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- W2685108722 doi "https://doi.org/10.1540/jsmr.53.57" @default.
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