Impact of pasteurization of human milk on preterm newborn in vitro digestion: Gastrointestinal disintegration, lipolysis and proteolysis.
Human milk feeding is an important recommendation for preterm newborns considering their vulnerability and digestive immaturity. Holder pasteurization (62.5°C, 30min) applied in milk banks modifies its biological quality and its microstructure. We investigated the impact of pasteurization of preterm human milk on its gastrointestinal kinetics of lipolysis, proteolysis and structural disintegration. An in vitro dynamic system was set up to simulate the gastrointestinal digestion of preterm newborns. A pool of preterm human milk was digested as raw or after Holder pasteurization. Pasteurization impacted the microstructure of undigested human milk, its gastrointestinal disintegration and tended to limit the intestinal lipolysis. Furthermore, the gastrointestinal bioaccessibility of some fatty acids was decreased by pasteurization, while the intestinal bioaccessibility of some amino acids was selectively modulated. The impact of pasteurization on the digestion of human milk may have nutritional relevance in vivo and potentially modulates preterm development and growth.
STLO, Agrocampus Ouest, INRA, Rennes, France.
Samira C
SC
de Oliveira
STLO, Agrocampus Ouest, INRA, Rennes, France.
Claire
C
Bourlieu
STLO, Agrocampus Ouest, INRA, Rennes, France.
Olivia
O
Ménard
Centre Hospitalier Universitaire de Rennes, Département de Pédiatrie, Rennes, France.
Amandine
A
Bellanger
STLO, Agrocampus Ouest, INRA, Rennes, France.
Gwénaële
G
Henry
STLO, Agrocampus Ouest, INRA, Rennes, France.
Florence
F
Rousseau
Centre Hospitalier Universitaire de Rennes, Département de Pédiatrie, Rennes, France.
Emelyne
E
Dirson
CNRS, Aix Marseille Université, UMR7282 Enzymologie Interfaciale & Physiologie de la Lipolyse, Marseille, France.
Frédéric
F
Carrière
STLO, Agrocampus Ouest, INRA, Rennes, France.
Didier
D
Dupont
STLO, Agrocampus Ouest, INRA, Rennes, France. Electronic address: amelie.deglaire@agrocampus-ouest.fr.
Amélie
A
Deglaire
D001682:Biological Availability; D002855:Chromatography, Thin Layer; D004063:Digestion; D005227:Fatty Acids / Q000032:analysis* / Q000737:chemistry; D005260:Female; D005767:Gastrointestinal Diseases / Q000503:physiopathology*; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008027:Light; D008055:Lipids / Q000737:chemistry; D008066:Lipolysis; D018613:Microscopy, Confocal; D008895:Milk, Human / Q000737:chemistry*; D010316:Particle Size; D061352:Pasteurization / Q000379:methods*; D059748:Proteolysis; D012542:Scattering, Radiation
D005227:Fatty Acids; D008055:Lipids
Holder pasteurization; Human milk; In vitro digestion; Lipolysis; Preterm newborn; Proteolysis