Journal
ASIAN JOURNAL OF ANDROLOGY
Volume 9, Issue 4, Pages 476-482Publisher
WOLTERS KLUWER MEDKNOW PUBLICATIONS
DOI: 10.1111/j.1745-7262.2007.00299.x
Keywords
proton pump; H*-ATPase; clear cells; bicarbonate resorption
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Funding
- NICHD NIH HHS [R01 HD040793, HD40793] Funding Source: Medline
- NIDDK NIH HHS [DK57521, DK43351, P01 DK038452, DK38452] Funding Source: Medline
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Luminal acidification in the epididymis is an important process for the regulation of male fertility. Low pH and low bicarbonate concentration are among key factors that keep spermatozoa in a dormant state while they mature and are stored in this organ. Although significant bicarbonate reabsorption is achieved by principal cells in the proximal regions of the epididymis, clear and narrow cells are specialized for net proton secretion. Clear cells express very high levels of the vacuolar proton pumping ATPase (V-ATPase) in their apical membrane and are responsible for the bulk of proton secretion. In the present paper, selected aspects of V-ATPase regulation in clear cells are described and potential pathologies associated with mutations of some of the V-ATPase subunits are discussed.
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