Relapsing polychondritis with glomerulonephritis. Improvement with prednisone and cyclophosphamide.

A 32-year-old man presented with relapsing polychondritis (RP) and microhematuria. A renal biopsy specimen disclosed focal segmental glomerulonephritis with occasional crescents. Immunofluorescent and electron micrographic studies suggested immune complex--mediated glomerular injury.

Digestion of tripeptides and disaccharides: relationship with brush border hydrolases.

Intestinal digestion of two tripeptides (leucyl-glycyl-glycine, prolyl-glycyl-glycine) and two disacchrarides (sucrose, maltose) was examined in the hamster by intestinal perfusion in vivo and hydrolysis of the substrates by microvillus membranes. Perfusion studies showed that luminal disappearance rates of leucyl-glycl-glycine were significantly higher than prolyl-glycyl-glycine (P less than o.001), sucrose (P less than 0.