Aquaporin 2 Polyclonal Antibodies

Aquaporins, also known as water channels, form pores in cell membranes and selectively transport water in and out of the cell. Aquaporins are involved in regulation of water balance and blood pressure, and thirteen different isoforms have been found in mammals. Aquaporin 2 (AQP2) is located in the collecting duct of the kidney, and is regulated by the peptide hormone vasopressin. AQP2 expression is increased in conditions where there is water retention, such as pregnancy and congestive heart failure, and mutations of AQP2 are associated with nephrogenic diabetes insipidus. Also, lithium treatment, often administered for bipolar disorder, can cause acquired diabetes insipidus by decreasing AQP2 expression.

The inventors have developed rabbit polyclonal antibodies directed against a peptide sequence in the C-terminal region of AQP2 (LKGLEPDTDWEEREVRRRQ). The sequence is upstream of phosphorylation sites in this region, and consequently the antibodies recognize both unphosphorylated and phosphorylated AQP2. The sequence is identical in human, rat, mouse, cow, and sheep.

Potential Commercial Applications: Competitive Advantages:
Western blotting, immunohistochemistry, and immunoprecipitation. 


Mark Knepper (NHLBI)  ➽ more inventions...

Intellectual Property:
Research Tool -- Patent prosecution is not being pursued for this technology

SR DiGiovanni, S Nielsen, EI Christensen, MA Knepper. Regulation of collecting duct water channel expression by vasopressin in Brattleboro rat. Proc Natl Acad Sci U S A. 1994 Sep 13;91(19):8984-8988. PubMed abs

Licensing Contact:
Brian Bailey, Ph.D.
Phone: 301-594-4094

OTT Reference No: E-045-2008-0
Updated: Dec 1, 2007