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Université de Bourgogne

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Table <strong>de</strong>s matières<br />

REMERCIEMENTS ....................................................................................................................... 1<br />

RESUME ...................................................................................................................................... 3<br />

ABSTRACT .................................................................................................................................. 4<br />

TABLE DES MATIERES ................................................................................................................ 5<br />

ABREVIATIONS ......................................................................................................................... 10<br />

LISTE DES FIGURES .................................................................................................................. 12<br />

LISTE DES TABLEAUX ............................................................................................................... 16<br />

INTRODUCTION ........................................................................................................................ 17<br />

SYNTHESE BIBLIOGRAPHIQUE ................................................................................................. 24<br />

LES LIPIDES ALIMENTAIRES .................................................................................................... 25<br />

1.1 Fonctions structurales et énergétiques .................................................................. 27<br />

1.2 Fonctions dans la signalisation cellulaire ............................................................. 27<br />

ABSORPTION INTESTINALE DES LIPIDES ALIMENTAIRES ........................................................ 28<br />

1 Les spécificités morphologiques et fonctionnelles <strong>de</strong> l’intestin grêle .......................... 28<br />

1.1 Anatomie complexe <strong>de</strong> l’épithélium intestinal ....................................................... 28<br />

1.2 Composition cellulaire <strong>de</strong> l’épithélium intestinal .................................................. 30<br />

1.3 Renouvellement intense <strong>de</strong> l’épithélium intestinal ................................................. 32<br />

2 Digestion <strong>de</strong>s lipi<strong>de</strong>s .................................................................................................... 34<br />

3 Absorption intestinale <strong>de</strong>s lipi<strong>de</strong>s ................................................................................ 35<br />

3.1 Captage transmembranaire <strong>de</strong>s AGLC .................................................................. 36<br />

3.1.1 FABPpm ....................................................................................................... 38<br />

3.1.2 FATP4 .......................................................................................................... 39<br />

3.1.3 CD36 ............................................................................................................ 40<br />

3.2 Le transport cytosolique <strong>de</strong>s AGLC ....................................................................... 48<br />

3.3 La ré-estérification <strong>de</strong>s AGLC en TG .................................................................... 51<br />

3.3.1 MGAT - Monoacylglycerol acyltransferase ................................................ 51<br />

5

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