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日粮添加牛乳脂肪球膜对幼猪生长、血清胆固醇和脂蛋白以及神经发育的影响评估。

Evaluation of Dietary Bovine Milk Fat Globule Membrane Supplementation on Growth, Serum Cholesterol and Lipoproteins, and Neurodevelopment in the Young Pig.

作者信息

Fil Joanne E, Fleming Stephen A, Chichlowski Maciej, Gross Gabriele, Berg Brian M, Dilger Ryan N

机构信息

Piglet Nutrition and Cognition Laboratory, University of Illinois, Urbana, IL, United States.

Neuroscience Program, University of Illinois, Urbana, IL, United States.

出版信息

Front Pediatr. 2019 Oct 17;7:417. doi: 10.3389/fped.2019.00417. eCollection 2019.

Abstract

Milk fat globule membrane (MFGM) is a protein- and phospholipid-rich membrane that surrounds the lipid droplet in milk. We have previously reported that a diet composed of a combination of prebiotics, bovine MFGM (bMFGM), and lactoferrin (bLf) supported brain development in young pigs. Due to the growing interest of its potential benefits in neurodevelopment, the present study focused on the effects of dietary bMFGM alone using the pig as a translational model. Male pigs were provided access to milk replacer with added whey protein-lipid concentrate (source of bMFGM) at 0 (CONT), 2.5 (MFGM-2.5), or 5 (MFGM-5.0) g/L from postnatal day (PND) 2 to 31. Blood was collected from pigs at PND 15 and 31, and pigs underwent behavioral testing using the novel object recognition task starting at PND 25. At PND 31, magnetic resonance imaging was conducted and animals were subsequently euthanized for tissue collection. No group differences in body weight gain or milk intake were observed. At PND 31, few group differences were detected in absolute and relative brain volumes, brain water diffusivity outcomes, or behavioral parameters using the novel object recognition task. Serum lipoprotein was higher in pigs receiving diets with added dietary bMFGM compared with the CONT group. Serum cholesterol and high-density lipoprotein significantly higher (all < 0.05) in the MFGM-2.5 compared with the CONT group. However, cholesterol concentrations within the brain prefrontal cortex and hippocampus did not differ among dietary groups. In this pig model, dietary supplementation with bMFGM was well-tolerated and supported growth and dietary intake similar to the control formula. Added dietary bMFGM was associated with increased serum lipoprotein, but no group differences in early brain cholesterol concentrations, macrostructure, microstructure, or recognition memory pigs at 31 days of age. Further examination of longitudinal brain development and myelination in the pig, particularly at later ages/maturation, is warranted.

摘要

乳脂肪球膜(MFGM)是一种富含蛋白质和磷脂的膜,它包裹着牛奶中的脂滴。我们之前曾报道,由益生元、牛MFGM(bMFGM)和乳铁蛋白(bLf)组合而成的饮食有助于幼猪的大脑发育。由于其在神经发育方面潜在益处的关注度不断提高,本研究以猪作为转化模型,重点关注单独使用饮食bMFGM的效果。从出生后第2天到31天,给雄性仔猪提供添加了乳清蛋白 - 脂质浓缩物(bMFGM的来源)的代乳品,添加量分别为0(对照组)、2.5(MFGM - 2.5组)或5(MFGM - 5.0组)克/升。在出生后第15天和31天采集仔猪血液,从出生后第25天开始使用新物体识别任务对仔猪进行行为测试。在出生后第31天,进行磁共振成像,随后对动物实施安乐死以收集组织。未观察到体重增加或牛奶摄入量的组间差异。在出生后第31天,使用新物体识别任务在绝对和相对脑容量、脑水扩散率结果或行为参数方面未检测到组间差异。与对照组相比,接受添加了饮食bMFGM的日粮的仔猪血清脂蛋白更高。与对照组相比,MFGM - 2.5组的血清胆固醇和高密度脂蛋白显著更高(均P < 0.05)。然而,饮食组之间大脑前额叶皮质和海马体内的胆固醇浓度没有差异。在这个猪模型中,饮食补充bMFGM耐受性良好,支持生长和饮食摄入,与对照配方相似。添加饮食bMFGM与血清脂蛋白增加有关,但在31日龄仔猪的早期脑胆固醇浓度、宏观结构、微观结构或识别记忆方面没有组间差异。有必要进一步研究猪的纵向脑发育和髓鞘形成,特别是在更高龄/成熟阶段。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fb2/6811645/0094008f875d/fped-07-00417-g0001.jpg

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