{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T08:28:58Z","timestamp":1767860938115,"version":"3.49.0"},"reference-count":74,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2006,9,11]],"date-time":"2006-09-11T00:00:00Z","timestamp":1157932800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecular Reproduction Devel"],"published-print":{"date-parts":[[2007,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Huntingtin interacting protein 1 (HIP1) is an endocytic adaptor protein with clathrin assembly activity that binds to cytoplasmic proteins, such as F\u2010actin, tubulin, and huntingtin (htt). To gain insight into diverse functions of HIP1, we characterized the male reproductive defect of HIP1<jats:sup>\u2212\/\u2212<\/jats:sup> mice from 7 to 30 weeks of age. High levels of HIP1 protein were expressed in the testis of wild\u2010type mice as seen by Western blots and as a reaction over Sertoli cells and elongating spermatids as visualized by immunocytochemistry. Accordingly, major structural abnormalities were evident in HIP1<jats:sup>\u2212\/\u2212<\/jats:sup> mice with vacuolation of seminiferous tubules caused by an apparent loss of postmeiotic spermatids and a significant reduction in mean profile area. Remaining spermatids revealed deformations of their heads, flagella, and\/or acrosomes. In some Sertoli cells, ectoplasmic specializations (ES) were absent or altered in appearance accounting for the presence of spherical germ cells in the epididymal lumen. Quantitative analyses of sperm counts from the cauda epididymidis demonstrated a significant decrease in HIP1<jats:sup>\u2212\/\u2212<\/jats:sup> mice compared to wild\u2010type littermates. In addition, computer\u2010assisted sperm analyses indicated that velocities, amplitude of lateral head displacements (ALH), and numbers and percentages of sperm in the motile, rapid, and progressive categories were all significantly reduced in HIP1<jats:sup>\u2212\/\u2212<\/jats:sup> mice, while the numbers and percentages of sperm in the static category were greatly increased. Taken together, these various abnormalities corroborate reduced fertility levels in HIP1<jats:sup>\u2212\/\u2212<\/jats:sup> mice and suggest a role for HIP1 in stabilizing actin and microtubules, which are important cytoskeletal elements enabling normal spermatid and Sertoli cell morphology and function. Mol. Reprod. Dev. \u00a9 2006 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/mrd.20564","type":"journal-article","created":{"date-parts":[[2006,9,11]],"date-time":"2006-09-11T21:53:05Z","timestamp":1158011585000},"page":"341-359","source":"Crossref","is-referenced-by-count":24,"title":["Structural abnormalities in spermatids together with reduced sperm counts and motility underlie the reproductive defect in HIP1<sup>\u2212\/\u2212<\/sup> mice"],"prefix":"10.1002","volume":"74","author":[{"given":"Karine","family":"Khatchadourian","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Charles 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