Open AccessPhotoprotection But Not N‐acetylcysteine Improves Intestinal Blood Flow and Oxidation Status in Parenterally Fed Piglets
Author(s) -
Huber LeeAnne,
Lee Theresa,
LeDrew Robyn L.,
Dodge M. Elaine,
Brunton Janet A.,
Bertolo Robert F.
Publication year - 2019
Publication title -
journal of pediatric gastroenterology and nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.206
H-Index - 131
eISSN - 1536-4801
pISSN - 0277-2116
DOI - 10.1097/mpg.0000000000002498
Subject(s) - medicine , parenteral nutrition , acetylcysteine , lipid peroxidation , blood flow , superior mesenteric artery , glutathione , antioxidant , endocrinology , anesthesia , biochemistry , oxidative stress , chemistry , enzyme
Objectives: The purpose of the present study was to determine if protecting parenteral nutrition solutions from ambient light and supplementing with N‐acetylcysteine (NAC) improves mesenteric blood flow, gut morphology, and oxidative status of parenterally fed neonates. Methods: Neonatal Yucatan miniature piglets (n = 23, 7–11 days old) were surgically fitted with central venous catheters and an ultrasonic blood flow probe around the superior mesenteric artery. Piglets were fed continuously for 7 days either light‐protected (LP) or light‐exposed (LE) complete parenteral nutrition that was enriched with either NAC or alanine (ALA). Results: There were no differences in body weight or overall gut morphology among groups after 7 days. Plasma concentrations of NAC were greater and total homocysteine lower in NAC‐ versus ALA‐supplemented pigs on day 7 ( N ‐acetylcysteine: 94 vs 7 μmol/L; P < 0.001; homocysteine: 14 versus 21 μmol/L; P < 0.005); plasma total glutathione was not affected. Hepatic lipid peroxidation was reduced by 25% in piglets that received LP parenteral nutrition ( P < 0.05). The mesenteric artery blood flow decreased in all pigs between days 2 and 6 ( P < 0.001) because of parenteral feeding. Photoprotection alone (LP‐ALA) attenuated the decrease in mesenteric blood flow to 66% of baseline on day 6 compared with LE‐ALA (37%; P < 0.05) and LP‐NAC pigs (43%; P = 0.062); LE‐NAC piglets had intermediate reductions in blood flow (55%). Conclusions: Photoprotection of parenteral nutrition solutions is a simple, effective method to attenuate decline in blood flow to the gut and hepatic lipid peroxidation, which are both commonly associated with parenteral feeding.