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Vasopressin increases AQP-CD water channel in apical membrane of collecting duct cells in Brattleboro rats
Abstract
The effect of vasopressin on subcellular localization of AQP-CD and AQP3 water channels was examined in thirsted Brattleboro rats by immunohistochemistry and immunoelectron microscopy. AQP-CD was mainly present in the cytoplasm of the collecting duct cells in association with cytoplasmic vesicles but was sparse in the apical membrane in control vehicle-injected rats. In rats given vasopressin 15 min before death, the number of immunogold particles for AQP-CD in the apical membrane increased significantly (P < 0.002) from 1.8 +/- 0.2 to 10.0 +/- 0.4/microns with a significant decrease (P < 0.05) of cytoplasmic labeling from 32.6 +/- 6.4 to 24.6 +/- 5.6/microns 2, indicating that AQP-CD is the vasopressin-regulated water channel predicted by the “shuttle” hypothesis. In contrast, AQP3 was restricted to the basolateral membrane of the collecting duct cells, and the labeling density of AQP3 was unchanged by vasopressin treatment, indicating that AQP3 is constitutively expressed and may maintain high water permeability of the basolateral membrane.
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Cited by
Aquaporins in the Kidney: From Molecules to Medicine
Nielsen, S., Frøkiær, J., Marples, D., Kwon, T.-H., Agre, P., & Knepper, M. A. (2002) · Physiological Reviews · doi:10.1152/physrev.00024.2001 · Cited by 1,251
Immunolocalization and translocation of aquaporin-5 water channel in sweat glands
Inoue, R., Sohara, E., Rai, T., Satoh, T., Yokozeki, H., Sasaki, S., & Uchida, S. (2013) · Journal of Dermatological Science · doi:10.1016/j.jdermsci.2013.01.013 · Cited by 52
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Metadata
- Authors
- Yamamoto, T., Sasaki, S., Fushimi, K., Ishibashi, K., Yaoita, E., Kawasaki, K., Marumo, F., & Kihara, I.
- Venue
- American Journal of Physiology-Cell Physiology
- Publisher
- American Physiological Society
- Published
- 1995-06-01
- Volume
- 268
- Issue
- 6
- Pages
- C1546-C1551
- ISSN
- 0363-6143 (ISSN-L)
- 1522-1563
- OpenAlex
- W20477608
- Cited by
- 204
- References
- 0
- FWCI
- 5.45
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Vasopressin increases AQP-CD water channel in apical membrane of collecting duct cells in Brattleboro rats. https://app.cochat.ai/papers/10.1152/ajpcell.1995.268.6.c1546
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- Yamamoto, T., Sasaki, S., Fushimi, K., Ishibashi, K., Yaoita, E., Kawasaki, K., Marumo, F., & Kihara, I. (1995). Vasopressin increases AQP-CD water channel in apical membrane of collecting duct cells in Brattleboro rats. American Journal of Physiology-Cell Physiology. https://doi.org/10.1152/ajpcell.1995.268.6.c1546
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