Rescue from lethal Shiga toxin 2-induced renal failure with a cell-permeable peptide
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Deborah J. Stearns-Kurosawa & Valta Collins & Scott Freeman & Diann Debord & Kiyotaka Nishikawa & Sun-Young Oh & Caitlin S. Leibowitz & Shinichiro Ku
- چاپ و سال / کشور: 2011
Description
Intestinal infection with Shiga toxin (Stx)-producing E.coli is a leading cause of hemolytic uremic syndrome and acute renal injury in otherwise healthy children in the US. Antibiotics are contraindicated and a therapeutic priority is agents that act intracellularly against the bacterial toxins that drive kidney injury. Our aim was to evaluate whether intravenous administration of a cellpermeable peptide (TVP) that binds to Stx2 will reduce disease severity and rescue juvenile baboons from a lethal Stx2 dose (50 ng/kg). TVP (5 mg/kg) was delivered i.v. simultaneously with toxin (prevention protocol) or at 6 or 24 h after toxin with daily 1 mg/kg supplements up to day 4 (rescue protocols). Biomarkers were monitored in blood and urine up to 28 days. TVP therapy resulted in either absence of clinical signs of acute kidney injury and normal urine output (prevention), or delayed and reduced BUN and creatinine levels (rescue) with concomitant survival. Delayed peptide administration significantly reduced thrombocytopenia, but surprisingly did not alter anemia even when monitored for 28 days in rescued survivors. This is the first successful cellpermeable therapeutic that counteracts Stx2 lethality in an animal model, which recapitulates many of the human responses to enteric infection.
Pediatr Nephrol DOI 10.1007/s00467-011-1913-y Received: 22 March 2011 / Revised: 28 April 2011 / Accepted: 28 April 2011
