Abstract
Immunocytochemistry for polyamines in the rat testis revealed intense staining of small bodies close to the lumen of seminiferous tubules of spermatogenic stage VII and VIII as well as of spermatocytes. Methyl green-pyronin and propidium iodide staining combined with DNase or RNase predigestion showed that the small bodies contained RNA, but not DNA and double fluorescence staining showed that polyamines (PAs) colocalized with RNA in the bodies. Electron microscopy confirmed the absence of nuclei in the bodies and revealed that PA immunoreactivity was associated with ribosomes. These results strongly suggest that the small bodies correspond to the residual bodies, and agree with previous results showing localization of PAs to ribosomes in neurons and gastrointestinal epithelial cells. The accumulation of PAs in residual bodies may reflect a termination of their role in spermiogenesis with respect to protein synthesis.
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Abbreviations
- PAs:
-
Polyamines
- ODC:
-
Ornithine decarboxylase
- RT:
-
Room temperature
- PBS:
-
Phosphate-buffered saline
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Shin, M., Larsson, LI. & Fujiwara, K. Polyamines in spermatocytes and residual bodies of rat testis. Histochem Cell Biol 127, 649–655 (2007). https://doi.org/10.1007/s00418-007-0285-7
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DOI: https://doi.org/10.1007/s00418-007-0285-7