Extracellular vesicles isolated from milk can improve gut barrier dysfunction induced by malnutrition

AbstractMalnutrition impacts approximately 50 million children worldwide and is linked to 45% of global mortality in children below the age of five. Severe acute malnutrition (SAM) is associated with intestinal barrier breakdown and epithelial atrophy. Extracellular vesicles including exosomes (EVs; 30–150 nm) can travel to distant target cells through biofluids including milk. Since milk-derived EVs are known to induce intestinal stem cell proliferation, this study aimed to examine their potential efficacy in improving malnutrition-induced atrophy of intestinal mucosa and barrier dysfunction. Mice were fed either a control (18%) or a low protein (1%) diet for 14 days to induce malnutrition. From day 10 to 14, they received either bovine milk EVs or control gavage and were sacrificed on day 15, 4 h after a Fluorescein Isothiocyanate (FITC) dose. Tissue and blood were collected for histological and epithelial barrier function analyses. Mice fed low protein diet developed intestinal villus atrophy and barrier dysfunction. Despite continued low protein diet feeding, milk EV treatment improved intestinal permeability, intestinal architecture and cellular proliferation. Our results suggest that EVs enriched from milk should be further explored as a valuable adjuvant therapy to standard clinical management of malnourished children with high risk of morbidity and mortality.

Download Full-text

Studies on the immunity of sheep to Oesophagostomum columbianum: effects of low-protein diet on resistance to infection and cellular reactions in the gut

Parasitology ◽

10.1017/s0031182000048083 ◽

1974 ◽

Vol 69 (2) ◽

pp. 239-255 ◽

Cited By ~ 30

Author(s):

Colin Dobson ◽

Richard J. Bawden

Keyword(s):

Mast Cell ◽

Protective Immunity ◽

Cellular Proliferation ◽

High Protein ◽

Protein Diet ◽

Low Protein Diet ◽

Low Protein ◽

Cell Counts ◽

Oesophagostomum Columbianum ◽

Protein Diets

Adult Oesophagostomum columbianum populations were larger in sheep fed low-protein diets than in adequately fed animals. Diet did not influence the numbers of larva which became established in sheep. Sheep fed high-protein diets eliminated more worms and were more immunologically competent than poorly fed animals. More encapsulated larvae, showing arrested development, were found in adequately fed sheep than in those fed low-protein diets. Adult O. columbianum produced eggs at an earlier time after infection in poorly fed sheep than worms in well fed sheep. More eggs/female worm were produced in sheep on a low-protein diet compared with the number of eggs produced in well fed hosts over the last week of the infection. The effects of immunity on the behaviour of the worm in both host diet groups is discussed.There was a greater cellular proliferation in the intestines of infected adequately fed sheep than in infected animals on low-protein diets. These changes were most pronounced in the large intestine where the adult parasites were found. The macrophage-lymphocyte series of cells underwent hyperplasia in well fed animals but these changes were reduced, particularly among the plasma cells, in sheep fed low-protein diets. Increased mucin and mast cell counts were observed in sheep on high-protein, but not in hosts on low-protein diets: the intestinal populations of eosinophil and globule leucocytes were also reduced in poorly fed sheep.The relationship of these various cellular reactions and their effect on the protective immunity of sheep to O. columbianum is discussed. It was concluded that the increased susceptibility of protein deprived sheep to O. columbianum infections was associated with malfunctions of the innate immunity of the gut, involving decreased peristalsis and failure of the mucin cell response, and with reduction of the adaptive immune response which was reflected by impoverished lymphocyte and plasma cell reactions, and possibly with poor cooperation between sensitized lymphocytes, antibodies and the mast cell-granulocyte effector mechanisms in protective immunity.

Download Full-text

SUN-PO059: Consumption of Low Protein Diet in Combination with Indomethacin Induced Growth Failure and Gut Barrier Dysfunction in Mice

Clinical Nutrition ◽

10.1016/s0261-5614(19)32693-7 ◽

2019 ◽

Vol 38 ◽

pp. S80

Author(s):

E. Salameh ◽

M. Jarbeau ◽

F. Morel ◽

M. Zeilani ◽

P. Déchelotte ◽

...

Keyword(s):

Growth Failure ◽

Protein Diet ◽

Low Protein Diet ◽

Barrier Dysfunction ◽

Gut Barrier ◽

Low Protein

Download Full-text

Effect of diet and stage of lactation on bovine milk lipolysis

Journal of Dairy Research ◽

10.1017/s0022029900020689 ◽

1979 ◽

Vol 46 (4) ◽

pp. 623-631 ◽

Cited By ~ 14

Author(s):

Amer M. A. Salih ◽

Malcolm Anderson

Keyword(s):

Serum Albumin ◽

Blood Plasma ◽

Cell Count ◽

Crude Protein ◽

Post Partum ◽

Bovine Milk ◽

Protein Diet ◽

Low Protein Diet ◽

Albumin Concentration ◽

Low Protein

SummaryThe effect of lactation and diet on milk lipoprotein lipase activity (LPL), cell count, serum albumin concentration and free fatty acid levels, expressed in terms of acid degree value (ADV), was examined in 2 experiments. In addition, the ability of blood plasma from cows on different diets to activate LPL was also investigated.Changes in ADV were not consistently associated with changes in LPL, cell count or serum albumin throughout lactation, although results indicated that ADV appeared to be influenced by cell count in early lactation, and by the amount of blood plasma proteins reaching the milk during the remainder of lactation. LPL activity was low in colostrum, but increased rapidly between d 2 and 12 post-partum, reaching a peak at 5 months. Activity was unaffected by diet.There was no effect on ADV of feeding concentrate: hay ratios of 75:25 and 60:40, but ADV was higher in cows fed a low protein diet (crude protein 9%) between 10 and 60 d post-partum, than in cows fed a high protein diet (crude protein 18 %) during the same period. In addition, the blood plasma for cows on the low protein diet had a greater ability to activate LPL although, on the basis of the millk: blood serum albumin ratio, a smaller proportion of blood constituents had reached the milk. The ability of blood plasma to activate LPL was also found to increase with increasing levels of lipoprotein lipid in the blood.

Download Full-text

Hepatic Ultrastructure Changes Induced by Lithocholic Acid

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100060829 ◽

1967 ◽

Vol 25 ◽

pp. 162-163 ◽

Cited By ~ 1

Author(s):

F. G. Zaki

Keyword(s):

Endoplasmic Reticulum ◽

Lithocholic Acid ◽

Smooth Endoplasmic Reticulum ◽

Protein Diet ◽

Low Protein Diet ◽

Electron Microscopic ◽

Hydropic Degeneration ◽

Hepatic Cells ◽

Low Protein ◽

Microscopic Studies

Addition of lithocholic acid (LCA), a naturally occurring bile acid in mammals, to a low protein diet fed to rats induced marked inflammatory reaction in the hepatic cells followed by hydropic degeneration and ductular cell proliferation. These changes were accompanied by dilatation and hyperplasia of the common bile duct and formation of “gallstones”. All these changes were reversible when LCA was withdrawn from the low protein diet except for the hardened gallstones which persisted.Electron microscopic studies revealed marked alterations in the hepatic cells. Early changes included disorganization, fragmentation of the rough endoplasmic reticulum and detachment of its ribosomes. Free ribosomes, either singly or arranged in small clusters were frequently seen in most of the hepatic cells. Vesiculation of the smooth endoplasmic reticulum was often encountered as early as one week after the administration of LCA (Fig. 1).

Download Full-text

Ernährung bei chronisch Nierenkranken – Wie kann man eine Low-Protein-Diet erreichen?

Dialyse aktuell ◽

10.1055/s-0035-1555716 ◽

2015 ◽

Vol 19 (05) ◽

pp. 256-256

Keyword(s):

Protein Diet ◽

Low Protein Diet ◽

Low Protein

Download Full-text

Project report: the effect of maternal low protein diet on the neuromuscular system of the offspring in mice

10.36866/pn.101.11 ◽

2016 ◽

pp. 11-11

Author(s):

Ifigeneia Giakoumaki

Keyword(s):

Protein Diet ◽

Low Protein Diet ◽

Neuromuscular System ◽

Project Report ◽

Low Protein

Download Full-text

Economic Effects of Treatment of Chronic Kidney Disease with Low-Protein Diet

SSRN Electronic Journal ◽

10.2139/ssrn.2338432 ◽

2013 ◽

Author(s):

Francesco Saverio Mennini ◽

Simone Russo ◽

Andrea Marcellusi ◽

Giuseppe Quintaliani ◽

Denis Fouque

Keyword(s):

Chronic Kidney Disease ◽

Kidney Disease ◽

Economic Effects ◽

Protein Diet ◽

Low Protein Diet ◽

Low Protein

Download Full-text

PSIV-6 Effect of a Phytogenic Water Additive on Growth Performance, Blood Metabolites and Gene Expression of Amino Acids Transporters in Nursery Pigs Fed with Low Protein Diets

Journal of Animal Science ◽

10.1093/jas/skaa278.507 ◽

2020 ◽

Vol 98 (Supplement_4) ◽

pp. 281-282

Author(s):

Cedrick N Shili ◽

Mohammad Habibi ◽

Julia Sutton ◽

Jessie Barnes ◽

Jacob Burchkonda ◽

...

Keyword(s):

Gene Expression ◽

Amino Acids ◽

Growth Performance ◽

Mrna Abundance ◽

Protein Diet ◽

Low Protein Diet ◽

Blood Calcium ◽

Low Protein ◽

Protein Diets ◽

Standard Protein

Abstract Moderately low protein (MLP) diets can help decrease nutrient excretion from the swine production. However, MLP diets negatively impact growth performance. We hypothesized that supplementing MLP diets with phytogenics may reduce the negative effects of these diets on growth. The objective of this study was to investigate the effect of a phytogenic water additive (PWA; Herbanimal®) on growth performance, blood metabolite and gene expression of amino acids transporters in pigs fed with MLP diets. Forty-eight weaned barrows were allotted to six dietary treatments (n = 8) for 4 weeks: >CON-NS: standard protein diet-no PWA; CON-LS: standard protein diet-low PWA dose (4 ml/L); CON-HS: standard protein diet-high PWA dose (8 ml/L); LP-NS: low protein diet-no PWA; LP-LS: low protein diet-low PWA dose (4 ml/L); LP-HS: low protein diet- high PWA dose (8 ml/L). Feed intake and body weight were recorded daily and weekly, respectively. At week 4, blood and tissue samples were collected and analyzed for metabolites using a chemistry analyzer and amino acid transporters using qPCR, respectively. The data were analyzed by univariate GLM (SPSS®) and the means were separated using paired Student’s t-test corrected by Benjamini-Hochberg. Pigs fed CON-HS improved the average daily gain and serum calcium and phosphorus concentrations compared to CON-NS. Pigs fed LP-LS had higher serum phosphorus and blood urea nitrogen compared to the pigs fed with LP-NS. The mRNA abundance of SLC7A11 in the jejunum was lower in CON-LS and CON-HS compared to CON-NS. Additionally, mRNA abundance of SLC6A19 in the jejunum of pigs fed with LP-LS was higher compared to LP-NS and lower in CON-HS relative to pigs fed with CON-LS. In conclusion, PWA improved the growth performance of pigs fed standard protein diets but not low protein diets. Further, the PWA improved the concentrations of blood calcium and phosphorous in pigs fed MLP diets. Funding: Agrivida and Animal Health and Production and Animal Products: Improved Nutritional Performance, Growth, and Lactation of Animals from the USDA-NIFA.

Download Full-text