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Title: Reduced intestinal FADS1 gene expression and plasma omega-3 fatty acids following Roux-en-Y gastric bypass
Authors: GARLA, PriscilaSALA, PriscilaTORRINHAS, Raquel Susana MatosMACHADO, Natasha MendoncaFONSECA, Danielle CristinaSILVA, Mariane Marques daRAVACCI, Graziela RosaBELARMINO, GilianeISHIDA, Robson KiyoshiGUARDA, Ismael Francisco Mota SiqueiraMOURA, Eduardo Guimardes Hourneaux deSAKAI, PauloSANTO, Marco AurelioSILVA, Ismael Dale Cotrim Guerreiro daPEREIRA, Claudia Cristina AlvesHEYMSFIELD, StevenCORREA-GIANNELLA, Maria Lucia CardilloCALDER, Philip C.WAITZBERG, Dan Linetzky
Citation: CLINICAL NUTRITION, v.38, n.3, p.1280-1288, 2019
Abstract: Background & aims: Roux-en-Y gastric bypass (RYGB) limits food ingestion and may alter the intestinal expression of genes involved in the endogenous synthesis of polyunsaturated fatty acids (PUFAs). These changes may decrease the systemic availability of bioactive PUFA5 after RYGB. To study the impact of RYGB on the dietary ingestion and plasma concentration of PUFA5 and on the intestinal expression of genes involved in their endogenous biosynthesis in severely obese women with type 2 diabetes. Methods: Before, and 3 and 12 months after RYGB, obese women (n = 20) self-reported a seven-day dietary record, answered a food frequency query and provided plasma samples for alpha-linolenic (ALA), eicosapentaenoic (EPA), docosahexaenoic (DHA) and arachidonic (ARA) acid assessment by gas chromatography. Intestinal biopsies (duodenum, jejunum and ileum) were collected through double balloon endoscopy before and 3 months after RYGB for gene expression analysis by microarray (Human GeneChip 1.0 ST array) and RT-qPCR validation. Results: Compared to the preoperative period, patients had decreased intakes of PUFAs, fish and soybean oil (p < 0.05) and lower plasma concentrations of ALA and EPA (p < 0.001) 3 and 12 months after RYGB. FADS] gene expression was lower in duodenum (RT-qPCR fold change = 1.620, p < 0.05) and jejunum (RT-qPCR fold change = -1.549, p < 0.05) 3 months following RYGB, compared to before surgery. Conclusion: RYGB decreased PUFA ingestion, plasma ALA and EPA levels, and intestinal expression of FADS] gene. The latter encodes a key enzyme involved in endogenous biosynthesis of PUFA5. These data suggest that supplementation of omega-3 PUFAs may be required for obese patients undergoing RYGB. Clinical Trial Registry number and website: NCT01251016; Plataforma Brasil - 19339913.0.0000.0068. (C) 02018 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.
Appears in Collections:Artigos e Materiais de Revistas Científicas - FM/MCM
Artigos e Materiais de Revistas Científicas - FM/MGT
Artigos e Materiais de Revistas Científicas - HC/ICHC
Artigos e Materiais de Revistas Científicas - HC/InCor
Artigos e Materiais de Revistas Científicas - LIM/18
Artigos e Materiais de Revistas Científicas - LIM/35

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