Fibrillary Glomerulonephritis: Looks like Amyloid but Its Not!

Objective Preeclampsia (preE), a syndrome of hypertension and proteinuria. Most recently it was demonstrated that high circulating levels of soluble (pro) renin receptor s(P)RR at delivery were associated with preE. In this study the placental expression of (P)RR were evaluated in preE patients and in a rat model of preE as well as in nonhuman primates. We also evaluated the circulatory levels of s(P)RR. Study Design (1) Placental samples were collected from 20 NP and 20 preE consenting patients in an IRB approved prospective study. (2) An established rat model of preE and NP rats (n=10 each) were used. (3) The placental samples from squirrel monkey (NP; n=10) and owl monkey (both early and term, NP, n=1) were collected. The (P)RR expression were measured both by western blotting (WB) and Immunohistochemistry (IHC) using anti-ATP6IP2. The levels of serum s(P)RR were measured by ELISA. Results The placental expression of (P)RR were higher (p Conclusions These data suggest that increased expression of (P)RR in the placenta are related to the occurrence of preE in both patients and rat models. These data also reconfirmed that the high level of circulatory s(P)RR is associated with preE. The higher expression of (P)RR in early owl monkey in compare to term placenta suggests that the (P)RR is important for normal placental development. The expression of (P)RR in nonhuman primates reveals the approach of future studies on owl monkey and squirrel monkey preE models.