References of "Portetelle, Daniel"
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See detailGenomic location of the bovine growth hormone secretagogue receptor (Ghsr) gene and investigation of genetic polymorphism
Colinet, Frédéric ULg; Vanderick, Sylvie ULg; Charloteaux, Benoît ULg et al

in Animal Biotechnology (2009), 20(1), 28-33

The growth hormone secretagogue receptor (GHSR) is involved in the regulation of energetic homeostasis and GH secretion. In this study, the bovine GHSR gene was mapped to BTA1 between BL26 and BMS4004 ... [more ▼]

The growth hormone secretagogue receptor (GHSR) is involved in the regulation of energetic homeostasis and GH secretion. In this study, the bovine GHSR gene was mapped to BTA1 between BL26 and BMS4004. Two different bovine GHSR CDS (GHSR1a and GHSR1b) were sequenced. Six polymorphisms (five SNPs and one 3-bp indel) were also identified, three of them leading to amino acid variations L24V, D194N, and Del R242. These variations are located in the extracellular N-terminal end, the exoloop 2, and the cytoloop 3 of the receptor, respectively. [less ▲]

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See detailGenetic analysis of lactoferrin content in bovine milk
Arnould, Valérie ULg; Soyeurt, Hélène ULg; Gengler, Nicolas ULg et al

in Journal of Dairy Science (2009), 92(5), 2151-2158

Bovine lactoferrin (LF) is mainly present in milk and shows important physiological and biological functions. The aim of this study was to estimate the heritability and correlation values of LF content in ... [more ▼]

Bovine lactoferrin (LF) is mainly present in milk and shows important physiological and biological functions. The aim of this study was to estimate the heritability and correlation values of LF content in bovine milk with different economic traits as milk yield (MY), fat and protein percentages, and somatic cell score (SCS). Variance components of the studied traits were estimated by REML using a multiple-trait mixed model. The obtained heritability (0.22) for LF content predicted using mid-infrared spectrometry (pLF) suggested the possibility of animal selection based on the increase of LF content in milk. The phenotypic and genetic correlation values calculated between pLF and SCS were moderate (0.31 and 0.24, respectively). Furthermore, a preliminary study of bovine LF gene polymorphism effects was performed on the same production traits. By PCR, all exons of the LF gene were amplified and then sequenced. Three new polymorphisms were detected in exon 2, exon 11, and intron 8. We examined the effects of LF gene polymorphisms of exons 2, 4, 9, 11, and 15, and intron 8 on pLF, MY, fat and protein percentages, and SCS. The different observed effects did not reach a significant level probably because of the characteristics of the studied population. However, the results were promising, and LF may be a potential indicator of mastitis. Further studies are necessary to evaluate the effect of genetic selection based on LF content on the improvement of mastitis resistance. [less ▲]

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See detailMolecular characterization of the bovine GHRL gene
Colinet, Frédéric ULg; Portetelle, Daniel ULg; Renaville, Robert ULg

in Archiv für Tierzucht = Archives Animal Breeding (2009), 52(1), 79-84

Bovine ghrelin, a 27 amino acid pepticle, has been identified in oxyntic glands of the abomasum. It is an endogenous ligand for growth hormone secretagogue receptor and stimulates food intake and growth ... [more ▼]

Bovine ghrelin, a 27 amino acid pepticle, has been identified in oxyntic glands of the abomasum. It is an endogenous ligand for growth hormone secretagogue receptor and stimulates food intake and growth hormone secretion. The bovine GHRL gene was completely sequenced and consists of five exons and four introns. Like mouse and human GHRL genes, we found that the bovine GHRL gene also contains a first non-coding exon of 21 bp. The bovine GHRL gene codes for 116 amino acid pepticle named preproghrelin which contains the ghrelin pepticle and another pepticle similar to obestatin. Sequence analysis revealed eight polymorphisms, which are located in the non-coding sequence of the gene. [less ▲]

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See detailIsolation and biomass production of a Saccharomyces cerevisiae strain binding copper and zinc ions
Stroobants, Aurore ULg; Delroisse, Jean-Marc; Delvigne, Frank ULg et al

in Applied Biochemistry and Biotechnology (2009), 157(1),

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See detailEffect Of A Bovine Colostrum Whey Supplementation On Growth Performance, Faecal Escherichia Coli Population And Systemic Immune Response Of Piglets At Weaning
Boudry, Christelle ULg; Dehoux, Jean-Paul; Wavreille, José et al

in Animal (2008), 2(5), 730-737

This study examined the effect of a bovine colsotrum whey supplementation on growth performance, feed intake, faecal Escherichia coli population and systemic immune response of piglets.

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See detailLes progrès de la microbiologie: de Louis Pasteur à la "microbiomique"
Portetelle, Daniel ULg

Conference given outside the academic context (2008)

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See detailSurvival of yolk’s immunoglobulins directed against Salmonella Enteritidis and Salmonella Typhimurium in the gastro-intestinal tract of the broiler chicken
Marcq, Christopher ULg; Graide, Virginie; Beckers, Yves ULg et al

in Proceedings of the Thirteenth Conference on Food Microbiology (2008)

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See detailBovine colostrum as a natural growth promoter for newly weaned piglets: a review.
Boudry, Christelle ULg; Dehoux, Jean-Paul; Portetelle, Daniel ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2008), 12(2), 157-170

The aim of this review is to present the potential of bovine colostrum as growth promoter in piglet-weaner diet. The consequences of weaning on the growth performance, on the gastro-intestinal tract and ... [more ▼]

The aim of this review is to present the potential of bovine colostrum as growth promoter in piglet-weaner diet. The consequences of weaning on the growth performance, on the gastro-intestinal tract and on the metabolic and endocrine systems of the piglet are described in the first part of this review. The second part is dedicated to the bovine colostrum, with a description of the actions due to its main growth promoters and antimicrobial factors. Finally, the reported effects of bovine specific components or bovine fractions on the growth performance and on the structure and function of the gastro-intestinal tract of piglets in the early postweaning period are presented. They show clearly the potential of bovine colostrum to reduce the growth-check related to the weaning of the piglet. [less ▲]

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See detailImmunomodulatory Properties Of Two Wheat Bran Fractions - Aleurone-Enriched And Crude Fractions - In Obese Mice Fed A High Fat Diet
Neyrinck, Am.; De Backer, F.; Cani, Pd. et al

in International Immunopharmacology (2008), 8(10),

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See detailProduction Of Hen Egg Yolk Immunoglobulins Simultaneously Directed Against Salmonella Enteritidis And Salmonella Typhimurium In The Same Egg Yolk
Chalghoumi, Raja ULg; Thewis, André ULg; Portetelle, Daniel ULg et al

in Poultry Science (2008), 87(1), 32-40

The present study was an attempt to raise hen egg yolk Ig (IgY) simultaneously directed against Salmonella Enteritidis (SE) and Salmonella Typhimurium (ST) in the same egg yolk. The immunopotentiating ... [more ▼]

The present study was an attempt to raise hen egg yolk Ig (IgY) simultaneously directed against Salmonella Enteritidis (SE) and Salmonella Typhimurium (ST) in the same egg yolk. The immunopotentiating effect of 2 different adjuvants—Freund’s adjuvants (FA) and immunostimulating complexes matrix (IM)—on antibody response was also evaluated. Bacterial outer membrane proteins (OMP) were selected as target antigens. The ISA Brown hens, specific-Salmonella spp.-free status, divided into 6 groups were intramuscularly injected with a monocompound antigen preparation: SE-OMP (treatment SEFA or SE-IM) or ST-OMP (treatment ST-FA or ST-IM), or a combined antigen preparation: ¹⁄₂ SE-OMP and ¹⁄₂ STOMP (treatment SEST-FA or SEST-IM). Titers of antibodies in yolk were evaluated biweekly with ELISA. There was no antigen × adjuvant interaction on antibody titers. Anti-SE IgY titers in hens that received treatment SESTFA or SEST-IM were statistically similar (P > 0.05) as compared with those obtained from hens immunized with treatment SE-FA or SE-IM. Anti-ST IgY titers in hens immunized with treatment SEST-FA or SEST-IM were slightly lower than those of hens that received treatment ST-FA or ST-IM. The cross-reactivity of anti-SE IgY, induced by treatment SE-FA or SE-IM, with ST-OMP antigen and that of anti-ST IgY, induced by ST-FA or ST-IM, with SE-OMP antigen were arbitrarily assessed on d 43 and 155 by ELISA. The average cross-reactivity of anti-SE IgY with ST-OMP antigen was 71.7%. The average cross-reactivity of anti-ST IgY with SE-OMP antigen was 78.8%. In FA groups, antibody titers were found higher (P < 0.05) than those in IM groups. Furthermore, no extensive lesions or clinical abnormalities were detected in hens injected with FA. These findings showed the opportunity to raise IgY antibody against 2 Salmonella serovars in the same yolk and that FA was more efficient than IM in mediating antibody response. [less ▲]

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