Memórias do Instituto Oswaldo Cruz | |
Perimicrovillar membrane assembly: the fate of phospholipids synthesised by the midgut of Rhodnius prolixus | |
Paula Rego Bittencourt-cunha1  Livia Silva-cardoso1  Giselle Almeida De Oliveira1  Jose Roberto Da Silva1  Alan Barbosa Da Silveira1  George Eduardo Gabriel Kluck1  Michele Souza-lima1  Katia Calp Gondim1  Marilvia Dansa-petretsky1  Carlos Peres Silva1  Hatisaburo Masuda1  Mario Alberto Cardoso Da Silva Neto1  Georgia Correa Atella1  | |
关键词: lipid metabolism; lipoprotein; lipid transport; phospholipids; midgut; | |
DOI : 10.1590/S0074-0276108042013016 | |
来源: SciELO | |
【 摘 要 】
In this study, we describe the fate of fatty acids that are incorporated from the lumen by the posterior midgut epithelium of Rhodnius prolixus and the biosynthesis of lipids. We also demonstrate that neutral lipids (NL) are transferred to the haemolymphatic lipophorin (Lp) and that phospholipids remain in the tissue in which they are organised into perimicrovillar membranes (PMMs). 3H-palmitic acid added at the luminal side of isolated midguts of R. prolixus females was readily absorbed and was used to synthesise phospholipids (80%) and NL (20%). The highest incorporation of 3H-palmitic acid was on the first day after a blood meal. The amounts of diacylglycerol (DG) and triacylglycerol synthesised by the tissue decreased in the presence of Lp in the incubation medium. The metabolic fates of 3H-lipids synthesised by the posterior midgut were followed and it was observed that DG was the major lipid released to Lp particles. However, the majority of phospholipids were not transferred to Lp, but remained in the tissue. The phospholipids that were synthesised and accumulated in the posterior midgut were found to be associated with Rhodnius luminal contents as structural components of PMMs.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO202103040048412ZK.pdf | 414KB | download |