Journal of Reproduction and Development
3,794 registered articles
(updated on June 21, 2021)
Online ISSN : 1348-4400
Print ISSN : 0916-8818
ISSN-L : 0916-8818
DOAJ Scopus Pubmed
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Volume 67 (2021) Issue 3 Pages 189-195
Regulation of primordial follicle formation, dormancy, and activation in mice Read more
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Cover Story:
In mammalian female reproduction, primordial follicles serve as stores to sustain the ovulation cycle. Regulations of primordial follicle development, activation, and dormancy in mice are summarized in a review by Nagamatsu (pp. 189–195). The importance of mechanical stress, especially extracellular matrix (ECM)-mediated pressure, for the maintenance of primordial follicle dormancy was recently demonstrated. Primordial follicles treated with collagenase, trypsin, and knockout serum replacement (KSR) (this mixture called CTK) to digest ECM were examined by immunohistochemistry. Ovaries treated solely with phosphate-buffered saline displayed primordial follicles composed of flat granulosa cells and complex stress fibers, as revealed by phalloidin. In contrast, CTK treatment resulted in fewer stress fibers and cuboidal-shaped granulosa cells, suggesting oocyte activation.

Volume 67 (2021) Issue 2 Pages 79-81
Lipid droplets are formed in 2-cell-like cells Read more
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Cover Story:
Recent studies suggested that a small sub-population of embryonic stem (ES) cells exhibit 2-cell stage embryo-like (2-cell-like) features, including the reactivation of murine endogenous retrovirus with leucin transfer RNA primer, high histone mobility, and dispersed chromocenters. Furuta et al. investigated the organelle morphology of 2-cell-like cells using electron microscopy (Furuta et al. Lipid droplets are formed in 2-cell-like cells. pp. 79–81). They demonstrated the formation of a lipid droplet during the transition from ES cells to 2-cell-like cells, and proposed that these cells utilize a unique energy storage and production pathway.

Volume 67 (2021) Issue 1 Pages 59-66
Expression and localization of alpha-tubulin N-acetyltransferase 1 in the reproductive system of male mice Read more
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Cover Story:
Previous reports suggested the involvement of alpha-tubulin N-acetyltransferase 1 (ATAT1) in flagella formation in spermatozoa; however, whether ATAT1 is expressed in flagella and involved in spermatozoa maturation and capacitation remains to be elucidated. Yanai et al. evaluated the expression of ATAT1 in the male reproductive system in mice using immunostaining and western blotting (Yanai et al. Expression and localization of alpha-tubulin N-acetyltransferase 1 in the reproductive system of male mice. pp. 59–66). The localization of ATAT1 protein in the male germline was detected during spermiogenesis as well as spermatozoa maturation. Therefore, these results suggest that ATAT1 might be involved not only in flagella formation, but also in the acetylation process during spermatozoa maturation and capacitation.

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