Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
AQP9
Introduction
Aquaporin-9 is a protein that in humans is encoded by the AQP9 gene.[1]
The aquaporins/major intrinsic protein are a family of water-selective membrane channels. Aquaporin 9 has greater sequence similarity with AQP3 and AQP7 and they may be a subfamily. Aquaporin 9 allows passage of a wide variety of noncharged solutes. AQP9 stimulates urea transport and osmotic water permeability; there are contradicting reports about its role in providing glycerol permeability. Aquaporin 9 may also have some role in specialized leukocyte functions such as immunological response and bactericidal activity.[1]
Further reading
Further reading
- Ishibashi K, Kuwahara M, Gu Y, et al. (1998). “Cloning and functional expression of a new aquaporin (AQP9) abundantly expressed in the peripheral leukocytes permeable to water and urea, but not to glycerol”. Biochem. Biophys. Res. Commun. 244 (1): 268–74. doi:10.1006/bbrc.1998.8252. PMID 9514918.
- Tsukaguchi H, Shayakul C, Berger UV, et al. (1998). “Molecular characterization of a broad selectivity neutral solute channel”. J. Biol. Chem. 273 (38): 24737–43. doi:10.1074/jbc.273.38.24737. PMID 9733774.
- Tsukaguchi H, Weremowicz S, Morton CC, Hediger MA (1999). “Functional and molecular characterization of the human neutral solute channel aquaporin-9”. Am. J. Physiol. 277 (5 Pt 2): F685–96. PMID 10564231.
- Pastor-Soler N, Bagnis C, Sabolic I, et al. (2001). “Aquaporin 9 expression along the male reproductive tract”. Biol. Reprod. 65 (2): 384–93. doi:10.1095/biolreprod65.2.384. PMID 11466204.
- Damiano A, Zotta E, Goldstein J, et al. (2001). “Water channel proteins AQP3 and AQP9 are present in syncytiotrophoblast of human term placenta”. Placenta. 22 (8–9): 776–81. doi:10.1053/plac.2001.0717. PMID 11597198.
- Strausberg RL, Feingold EA, Grouse LH, et al. (2003). “Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences”. Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
- Okada S, Misaka T, Matsumoto I, et al. (2003). “Aquaporin-9 is expressed in a mucus-secreting goblet cell subset in the small intestine”. FEBS Lett. 540 (1–3): 157–62. doi:10.1016/S0014-5793(03)00256-4. PMID 12681500.
- Bhattacharjee H, Carbrey J, Rosen BP, Mukhopadhyay R (2004). “Drug uptake and pharmacological modulation of drug sensitivity in leukemia by AQP9”. Biochem. Biophys. Res. Commun. 322 (3): 836–41. doi:10.1016/j.bbrc.2004.08.002. PMID 15336539.
- Gerhard DS, Wagner L, Feingold EA, et al. (2004). “The Status, Quality, and Expansion of the NIH Full-Length cDNA Project: The Mammalian Gene Collection (MGC)”. Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
- Wang S, Chen J, Beall M, et al. (2005). “Expression of aquaporin 9 in human chorioamniotic membranes and placenta”. Am. J. Obstet. Gynecol. 191 (6): 2160–7. doi:10.1016/j.ajog.2004.05.089. PMID 15592307.
- Damiano AE, Zotta E, Ibarra C (2006). “Functional and molecular expression of AQP9 channel and UT-A transporter in normal and preeclamptic human placentas”. Placenta. 27 (11–12): 1073–81. doi:10.1016/j.placenta.2005.11.014. PMID 16480766.
- Olsen JV, Blagoev B, Gnad F, et al. (2006). “Global, in vivo, and site-specific phosphorylation dynamics in signaling networks”. Cell. 127 (3): 635–48. doi:10.1016/j.cell.2006.09.026. PMID 17081983.
- Loitto VM, Huang C, Sigal YJ, Jacobson K (2007). “Filopodia are induced by aquaporin-9 expression”. Exp. Cell Res. 313 (7): 1295–306. doi:10.1016/j.yexcr.2007.01.023. PMID 17346701.
- Warth A, Mittelbronn M, Hülper P, et al. (2007). “Expression of the water channel protein aquaporin-9 in malignant brain tumors”. Appl. Immunohistochem. Mol. Morphol. 15 (2): 193–8. doi:10.1097/01.pai.0000213110.05108.e9. PMID 17525633.
External links
External links
- AQP9+protein,+human at the US National Library of Medicine Medical Subject Headings (MeSH)
- Human AQP9 genome location and AQP9 gene details page in the UCSC Genome Browser.
This article incorporates text from the United States National Library of Medicine, which is in the public domain.