INIBIOLP   05426
INSTITUTO DE INVESTIGACIONES BIOQUIMICAS DE LA PLATA "PROF. DR. RODOLFO R. BRENNER"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
2. Liver Fatty Acid Binding Protein (L-FABP) participates in different cell processes in the enterocyte
Autor/es:
FALOMIR LOCKHART LJ; RODRIGUEZ SAWICKI L; FRANCHINI GR; STORCH J; CÓRSICO, B.
Lugar:
Tucumán
Reunión:
Congreso; XLV Congreso de SAIB; 2009
Institución organizadora:
SAIB
Resumen:
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Liver Fatty
Acid Binding Protein (L-FABP) participates in different cell processes in the
enterocyte
Falomir
Lockhart LJ, Rodriguez Sawicki L, Franchini GR, Storch J, Córsico
B
Instituto de Investigaciones Bioquímicas de La Plata
(CONICET-UNLP), Fac. de Cs. Médicas, La Plata.
The
intestine assimilates and processes a large quantity of lipids incorporated
with the diet. Lipids are absorbed mainly as free fatty acids (FA), cholesterol
and monoacylglicerol to be then reesterified inside the enterocytes and secreted
as Quilomicrons into the lymph. The classical functions attributed to FABP are as
cytosolic buffer and transporter of hydrophobic ligands. Nevertheless, new
functions have been suggested related to control of gene expression. It is
suggested that intestinal FABP would facilitate the intracellular transport of
FA and that they could also have a role in the regulation of lipid metabolism
and other cellular processes. In this work we obtained an L-FABP knock-down model
in Caco-2 cells by anti-mRNA overexpression. We analyzed the effect on the
assimilation, metabolism and secretion of FA as well as on the cellular
proliferation and differentiation processes. No compensation by I-FABP was
observed in differentiated cells. Knock-down clones showed a marked decrease in
oleate assimilation, while palmitate assimilation was increased. Differences in
oleate distribution were observed at short times, but they disappeared after
hours and no change in oleate distribution was observed in secreted lipids. On
the other hand, cell proliferation and differentiation were slowed. These
results indicate that L-FABP is an important factor of enterocyte
functionality.