Search results for author Grietje Holtrop

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Result count: 62


Category: "Refereed journal"

Gratz, S.W., Currie, V., Richardson, A.J., Duncan, G., Holtrop, G., Farquharson, FM., Louis, P., Pinton, P. and Oswald, I.P. (2018). Porcine Small and Large Intestinal Microbiota Rapidly Hydrolyze the Masked Mycotoxin Deoxynivalenol-3-Glucoside and Release Deoxynivalenol in Spiked Batch Cultures In Vitro. Applied and Environmental Microbiology 84(2), UNSP e02106-17. American Society for Microbiology, Washington, DC.

Kettle, H., Holtrop, G., Louis, P. and Flint, H.J. (2018). microPop: Modelling microbial populations in R. Methods in Ecology and Evolution 9(2), 399-409.

Reichardt, N., Vollmer, M., Holtrop, G., Farquharson, FM., Wefers, D., Bunzel, M., Duncan, S.H., Drew, J.E., Williams, L., Milligan, G., Preston, T., Morrison, D., Flint, H.J. and Louis, P. (2018). Specific substrate-driven changes in human faecal microbiota composition contrast with functional redundancy in short-chain fatty acid production. The ISME Journal 12(2), 610-622. Nature Publishing Group, London.

Gratz, S.W., Dinesh, R., Yoshinari, T., Holtrop, G., Richardson, A.J., Duncan, G., McDonald, S., Lloyd, A. and Tarbin, J. (2017). Masked trichothecenes and zearalenone mycotoxins withstand digestion and absorption in the upper GI tract but are efficiently hydrolyzed by human gut microbiota in vitro. Molecular Nutrition & Food Research 61(4). Wiley, Weinheim.

Jobarteh, M.L., McArdle, H.J., Holtrop, G., Sise, EA., Prentice, A.M. and Moore, S.E. (2017). mRNA levels of placental iron and zinc transporter genes upregulated in Gambian women with low iron and zinc status. Journal of Nutrition 147(7), 1401-1409. American Society for Nutrition, Bethesda, USA.

Clark, L.F., Thivierge, C., Kidd, CA., McGeoch, S.C., Abraham, P., Pearson, D.W., Horgan, G.W., Holtrop, G., Thies, F. and Lobley, G.E. (2016). Fish oil supplemented for 9 months does not improve glycaemic control or insulin sensitivity in subjects with impaired glucose regulation: a parallel randomised controlled trial. British Journal of Nutrition 115(1), 75-86.

Hoskin, S.O., Bremner, D.M., Holtrop, G. and Lobley, G.E. (2016). Responses in whole-body amino acid kinetics to an acute, sub-clinical endotoxin challenge in lambs. British Journal of Nutrition 115(4), 576-584. Cambridge University Press.

McNeil, C.J., Hoskin, S.O., Bremner, D.M., Holtrop, G. and Lobley, G.E. (2016). Whole body and splanchnic amino acid metabolism in sheep during an acute endotoxin challenge. British Journal of Nutrition 116, 211-222. Cambridge University Press.

Kettle, H., Louis, P., Duncan, S.H., Flint, H.J. and Holtrop, G. (2015). Modelling the emergent dynamics of communities of human colonic microbiota. Environmental Microbiology 17(5), 1615-1630. Wiley.

Lobley, G.E., Holtrop, G., Horgan, G.W., Bremner, D.M., Fyfe, C. and Johnstone, A.M. (2015). Responses in gut hormones and hunger to diets with either high protein or a mixture of protein plus free amino acids supplied under weight-loss conditions. British Journal of Nutrition 113(08), 1254-1270.

Gratz, S.W., Richardson, A.J., Duncan, G. and Holtrop, G. (2014). Annual variation of dietary deoxynivalenol exposure during years of different Fusarium prevalence: a pilot biomonitoring study. Food Additives and Contaminants Part A: Chemistry Analysis Control Exposure and Risk Assessment 31(9), 1579-1585. Taylor and Francis/CRC Press.

Lobley, G.E., Johnstone, J.A., Fyfe, C., Horgan, G.W., Holtrop, G., Bremner, D.M., Broom, J.I., Schweiger, L. and Welch, A. (2014). Glucose uptake by the brain on chronic high-protein weight-loss diets with either moderate or low amounts of carbohydrate. British Journal of Nutrition 11, 586-597.

Salonen, A., Lahti, L., Saloharvi, J., Holtrop, G., Korpela, K., Duncan, S.H., Date, P., Farquharson, F., Johnstone, A.M., Lobley, G.E., Louis, P., Flint, H.J. and de Vos, W.M. (2014). Impact of diet and individual variation on intestinal microbiota composition and fermentation products in obese men. International Society for Microbial Ecology Journal 8(11), 2218-2230. Nature Publishing Group.

Zhang, X., McGeoch, S.C., Johnstone, A.M., Holtrop, G., Sneddon, A., MacRury, S.M., Megson, I.L., Pearson, D.W., Abraham, P., de Roos, B., Lobley, G.E. and O'Kennedy, N. (2014). Platelet-derived microparticle count and surface molecule expression differ between subjects with and without type 2 diabetes, independently of obesity status. Journal of Thrombosis and Thrombolysis 37(4), 455-463. Springer Verlag.

Zhang, X., McGeoch, S.C., Megson, I.L., MacRury, S.M., Johnstone, A.M., Abraham, P., Pearson, D.W., de Roos, B., Holtrop, G., O'Kennedy, N. and Lobley, G.E. (2014). Oat-enriched diet reduces inflammatory status assessed by circulating cell-derived microparticle concentrations in type 2 diabetes. Molecular Nutrition & Food Research 58(6), 1322-1332.

Lobley, G.E., Holtrop, G., Bremner, D.M., Calder, A.G., Milne, E. and Johnstone, A.M. (2013). Impact of short term consumption of diets high in either non-starch polysaccharides or resistant starch in comparison with moderate weight loss on indices of insulin sensitivity in subjects with metabolic syndrome. Nutrients 5(6), 2144-2172.

McGeoch, S.C., Johnstone, A.M., Lobley, G.E., Adamson, J., Hickson, K., Holtrop, G., Clark, L.F., Pearson, D.W., Abraham, P., Megson, I.L. and MacRury, S.M. (2013). A randomised crossover study to assess the effect of an oat-rich diet on glycaemic control, plasma lipids and postprandial glycaemia, inflammation and oxidative stress in Type 2 diabetes. Diabetic Medicine 30(11), 1314-1323.

Holtrop, G., Johnstone, A.M., Fyfe, C. and Gratz, S.W. (2012). Diet composition is associated with endogenous formation of N-nitroso compounds in obese men. Journal of Nutrition 142(9), 1652-1658.

Lapierre, H., Holtrop, G., Calder, A.G., Renaud, J. and Lobley, G.E. (2012). Is D-methionine bioavailable to the dairy cow. Journal of Dairy Science 95(1), 353-362.

McIntosh, F.M., Maison, N., Holtrop, G., Young, P., Stevens, V.J., Ince, J., Johnstone, A.M., Lobley, G.E., Flint, H.J. and Louis, P. (2012). Phylogenetic distribution of genes encoding beta-glucuronidase activity in human colonic bacteria and the impact of diet on faecal glycosidase activities. Environmental Microbiology 14(8), 1876-1887.

Tannock, G.W., Wilson, C., Loach, D., Cook, G.M., Eason, J., O'Toole, P.W., Holtrop, G. and Lawley, B. (2012). Resource partitioning in relation to cohabitation of Lactobacillus species in the mouse forestomach. International Society for Microbial Ecology Journal 6(5), 927-938.

Wilson, F.A., Holtrop, G., Calder, C.A., Anderson, S.E., Lobley, G.E. and Rees, W.D. (2012). Effects of methyl-deficient diets on methionine and homocysteine metabolism in the pregnant rat. American Journal of Physiology - Endocrinology and Metabolism 302(12), E1531-E1540.

Belanche, A.B., Abecia, L., Holtrop, G., Guada, J.A., Castrillo, C., de la Fuente, G. and Balcells, J. (2011). Study of the effect of presence or absence of protozoa on rumen fermentation and microbial protein contribution to the chyme. Journal of Animal Science 89(12), 4163-4174.

Belenguer, A., Holtrop, G., Duncan, S.H., Anderson, S.E., Calder, A.G., Flint, H.J. and Lobley, G.E. (2011). Rates of production and utilisation of lactate by microbial communities from the human colon. FEMS Microbiology Ecology 77(1), 107-119.

Lapierre, H., Vazquez-Anon, M., Parker, D., Dubreuil, P., Holtrop, G. and Lobley, G.E. (2011). Metabolism of 2-hydroxy-4-(methylthio)butanoate (HMTBA) in lactating dairy cows. Journal of Dairy Science 94(3), 1526-1535.

Lawson, D.J., Holtrop, G. and Flint, H.J. (2011). Bayesian analysis of non-linear differential equation models with application to a gut microbial ecosystem. Biometrical Journal 53, 543-556.

McGeoch, S.C., Holtrop, G., Fyfe, C., Lobley, G.E., Pearson, D.W.M., Abraham, P., Megson, I.L., MacRury, S.M. and Johnstone, A.M. (2011). Food intake and dietary glycaemic index in free-living adults with and without type 2 diabetes mellitus. Nutrients 3, 683-693.

Russell, W., Gratz, S.W., Duncan, S.H., Holtrop, G., Ince, J., Scobbie, L., Duncan, G., Johnstone, A.M., Lobley, G.E., Wallace, R.J., Duthie, G.G. and Flint, H.J. (2011). High-protein, reduced-carbohydrate weight-loss diets promote metabolite profiles likely to be detrimental to colonic health. American Journal of Clinical Nutrition 93(5), 1062-2072.

Walker, A.W., Ince, J., Duncan, S.H., Webster, L.M., Holtrop, G., Ze, X.L., Brown, D.S., Stares, M.D., Scott, P., Bergerat, A., Louis, P., McIntosh, F., Johnstone, A.M., Lobley, G.E., Parkhill, J. and Flint, H.J. (2011). Dominant and diet-responsive groups of bacteria within the human colonic microbiota. International Society for Microbial Ecology Journal 5(2), 220-230.

Louis, P., Young, P., Holtrop, G. and Flint, H.J. (2010). Diversity of human colonic butyrate-producing bacteria revealed by analysis of the butyryl-CoA:acetate CoA-transferase gene. Environmental Microbiology 12(2), 304-314.

Ouellet, D.R., Berthiaume, R., Holtrop, G., Lobley, G.E., Martineau, R. and Lapierre, H. (2010). Effect of method of conservation of timothy on endogenous nitrogen flows in lactating dairy cows. Journal of Dairy Science 93, 4252-4261.

Gambling, L., Czopek, A., Andersen, H.S., Holtrop, G., Srai, K.S., Krejpcio, Z. and McArdle, H.J. (2009). Fetal iron status regulates maternal iron metabolism during pregnancy in the rat. American Journal of Physiology - Regulatory, Integrative and Comparative Physiology 296(4), R1063-R1070.

Ramirez, C., Slezak, K., Fuller, Z., Duncan, A.J., Holtrop, G. and Louis, P. (2009). Effect of inulin on the human gut microbiota: stimulation of Bifidobacterium adolescentis and Faecalibacterium prausnitzii. British Journal of Nutrition 101, 541-550.

Wilson, F.A., van den Borne, J.J.G.C., Calder, A.G., O'Kennedy, N., Holtrop, G., Rees, W.D. and Lobley, G.E. (2009). Tissue methionine cycle activity and homocysteine metabolism in female rats: impact of dietary methionine and folate plus choline. American Journal of Physiology - Endocrinology and Metabolism 296, E702-E713.

Abecia, L., Balcells, J., Fondevila, M., Belenguer, A., Holtrop, G. and Lobley, G.E. (2008). Contribution of gut microbial lysine to liver and milk amino acids in lactating does. British Journal of Nutrition 100, 977-983.

Belenguer, A., Duncan, S.H., Holtrop, G., Flint, H.J. and Lobley, G.E. (2008). Quantitative analysis of microbial metabolism in the human large intestine. Current Nutrition and Food Science 4, 109-126.

Duncan, S.H., Lobley, G.E., Holtrop, G., Ince, J., Johnstone, A.M., Louis, P. and Flint, H.J. (2008). Human colonic microbiota associated with diet, obesity and weight loss. International Journal of Obesity 32, 1720-1724.

Lapierre, H., Ouellet, D.R., Berthiaume, R., Martineau, R., Holtrop, G. and Lobley, G.E. (2008). Distribution of (15)N in amino acids during (15)N-leucine infusion: impact on the estimation of endogenous flows in dairy cows. Journal of Dairy Science 91, 2702-2714.

Walker, A.W., Duncan, S.H., Harmsen, H.J.M., Holtrop, G., Welling, G.W. and Flint, H.J. (2008). The species composition of the human intestinal microbiota differs between particle-associated and liquid phase communities. Environmental Microbiology 10, 3275-3283.

Andersen, H.S., Gambling, L., Holtrop, G. and McArdle, H.J. (2007). Effect of dietary copper deficiency in the pregnant rat. British Journal of Nutrition 97, 239-246.

Belenguer, A., Duncan, S.H., Holtrop, G., Anderson, S.E., Lobley, G.E. and Flint, H.J. (2007). Impact of pH on lactate formation and utilization by human fecal microbial communities. Applied and Environmental Microbiology 73, 6526-6533.

Duncan, S.H., Belenguer, A., Holtrop, G., Johnstone, A.M., Flint, H.J. and Lobley, G.E. (2007). Reduced dietary intake of carbohydrate by obese subjects results in decreased concentrations of butyrate and butyrate-producing bacteria in feces. Applied and Environmental Microbiology 73, 1073-1078.

Lobley, G.E., Bremner, D.M., Holtrop, G., Johnstone, A.M. and Maloney, C. (2007). Impact of high protein diets with either moderate or low carbohydrate on weight loss, body composition, blood pressure and glucose tolerance in rats. British Journal of Nutrition 97, 1099-1108.

McWilliam Leitch, E.C., Walker, A.W., Duncan, S.H., Holtrop, G. and Flint, H.J. (2007). Selective colonization of insoluble substrates by human fecal bacteria. Environmental Microbiology 9, 667-679.

Özbilgin, H., Ferro, R.S.T., Robertson, J.H.B., Holtrop, G. and Kynoch, R.J. (2006). Seasonal variation in trawl cod-end selection of northern North Sea haddock. ICES Journal of Marine Science 63, 737-748.

Andersen, H.S., Gambling, L., Holtrop, G. and McArdle, H.J. (2006). Maternal iron deficiency identifies critical windows for growth and cardiovascular development in the rat postimplantation embryo. Journal of Nutrition 136, 1171-1177.

Belenguer, A., Duncan, S.H., Calder, A.G., Holtrop, G., Louis, P., Lobley, G.E. and Flint, H.J. (2006). Two routes of metabolic cross-feeding between Bifidobacterium adolescentis and butyrate producing anaerobes from the human gut. Applied and Environmental Microbiology 72, 3593-3599.

Holtrop, G., Petrie, J., McElhiney, J. and Dennison, N. (2006). Can general anaesthesia be used for the Paralytic Shellfish Poison bioassay. Toxicon 47, 336-347.

Lapierre, H., Pacheco, D., Berthiaume, R., Ouellet, D.R., Schwab, C., Dubreuil, P., Holtrop, G. and Lobley, G.E. (2006). What is the true supply of amino acids for a dairy cow. Journal of Dairy Science 89(E. Suppl.), E1-E14.

Lobley, G.E., Wester, T.J., Holtrop, G., Parker, D., Dibner, J.J. and Vazquez-Anon, M. (2006). Absorption and digestive tract metabolism of 2-hydroxy-4-thiomethylbutyrate (HMTBA) in lambs. Journal of Dairy Science 89, 3508-3521.

Duncan, S.H., Holtrop, G., Lobley, G.E., Calder, A.G., Stewart, C.S. and Flint, H.J. (2004). Contribution of acetate to butyrate formation by human faecal bacteria. British Journal of Nutrition 91, 915-923.

Holtrop, G., Yu, F., Coop, R.L., Bruce, L.A., Lobley, G.E. and Macrae, J.C. (2004). Modelling endogenous leucine flows at the jejunum and ileum in lambs exposed to the intestinal parasite Trichostrongylus colubriformis. Journal of Animal Feed Sciences 13, 589-613.

Holtrop, G., Lapierre, H. and Lobley, G.E. (2004). Modelling transport of amino acids into the red blood cells of sheep. Journal of Agricultural Science 142, 577-588.

Gambling, L., Dunford, S., Wallace, D.I., Holtrop, G., Solanky, N., Srai, K.S. and McArdle, H.J. (2003). Iron deficiency durnig pregnancy affects post-natal blood pressure in the rat. Journal of Physiology 552, 603-610.

Hoskin, S.O., Savary-Auzeloux, I.C., Calder, A.G., Holtrop, G. and Lobley, G.E. (2003). Effect of feed intake on amino acid transfers across the ovine hind-quarters. British Journal of Nutrition 89, 167-179.

Holtrop, G., Garthwaite, P.H. and Fryer, R.J. (2002). Practical use of MCMC methods: Lessons from a case study. Biometrical Journal 44, 433-455.

Ouellet, D.R., Demers, M., Holtrop, G., Lobley, G.E., Seoane, J.R., Nolan, J.V. and Lapierre, H. (2002). Effect of dietary fiber on endogenous nitrogen flows in lactating dairy cows. Journal of Dairy Science 85, 3013-3025.

Holtrop, G., Fryer, R.J., Ferro, R.S.T. and Tokai, T. (2001). Modelling the size selectivities of a trawl cod-end and an associated square mesh panel. ICES Journal of Marine Science 58, 657-671.

Hoskin, S.O., Savary, I.C., Holtrop, G. and Lobley, G.E. (2001). Effect of feed intake on ovine hind-limb protein metabolism based on 13 amino acids and arterio-venous techniques. British Journal of Nutrition 86, 577-585.

Lobley, G.E., Bremner, D.M. and Holtrop, G. (2000). Effects of diet quality on urea fates in sheep; assessed by refined, non-invasive [15N15N] urea kinetics. British Journal of Nutrition 84, 459-468.

Kynoch, R.J., Ferro, R.S.T. and Holtrop, G. (1999). The effect on juvenile haddock by-catch of changing cod-end twine thickness in EU trawl fisheries. Marine Technology Society Journal 33, 61-72.

Brinkman, A.G., Philippart, C.J.M. and Holtrop, G. (1994). Mesocosms and ecosystem modelling. Vie et Milieu 44, 29-37.

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