References of "Dandrifosse, Guy"
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See detailThe concentration of polyamines in human blood : a reinvestigation
Collienne, p; Grandfils, Christian ULg; Klimek, Monique ULg et al

Poster (2000, April 13)

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See detailCyclosporine a Inhibits Partially Spermine-Induced Differentiation but Not Cell Loss of Suckling Rat Small Intestine
Peulen, Olivier ULg; Dandrifosse, Guy ULg

in Digestive Diseases & Sciences (2000), 45(4), 750-4

The polyamines are of great importance in several biological processes, such as cell proliferation, and differentiation. The ingestion of spermine by suckling rats induces the precocious maturation of ... [more ▼]

The polyamines are of great importance in several biological processes, such as cell proliferation, and differentiation. The ingestion of spermine by suckling rats induces the precocious maturation of their small intestine. This phenomenon is preceded by a cell elimination at the villus tip. We hypothesize that these two phenomena could be mediated by the immune system and thus inhibited by an immunosuppressive agent such as cyclosporine A. Cyclosporine A inhibits, at least partially, the spermine-induced increase of the maltase- and sucrase-specific activities in the small intestine but failed to inhibit lactase-specific activity decrease and cell loss. Spermine does not act by the same mechanism in differentiation and in cell loss. Moreover, spermine acts in a different way on lactase-specific activity compared to maltase- or sucrase-specific activity. We hypothesize that spermine acts on differentiation by a T-cell/IL-2-dependent mechanism. [less ▲]

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See detailAre Milk Polyamines Preventive Agents against Food Allergy?
Dandrifosse, Guy ULg; Peulen, Olivier ULg; El Khefif, N. et al

in Proceedings of the Nutrition Society (2000), 59(1), 81-6

Insufficient polyamine intake could play a role in the induction of sensitization to dietary allergens. This proposal is based essentially on investigations made in sucking rats and in children. In ... [more ▼]

Insufficient polyamine intake could play a role in the induction of sensitization to dietary allergens. This proposal is based essentially on investigations made in sucking rats and in children. In sucking rats it has been established that oral administration of spermine can induce all the modifications occurring in the digestive tract at weaning. In the intestine events occur in two phases. The early event consists of desquamation of the epithelium resulting from an activation of apoptosis. The late event appears to involve an hormonal cascade in which adrenocorticotropic hormone, cytokines, bombesin and corticosterone are included. Observations in human subjects show that: (1) the spermine and spermidine concentrations are generally lower in infant formulas than in human breast milk. Mothers seem consistently to have relatively high or relatively low concentrations of spermine and spermidine in their milk. These individual variations may be due to diet, lifestyle or genetic background; (2) the probability of developing allergy can reach 80 % if the mean spermine concentration in the milk is lower than 2 nmol/ml milk. It is approximately 0 % if the mean spermine concentration is higher than 13 nmol/ml milk; (3) preliminary results show that the intestinal permeability to macromolecules differs in premature babies when they are fed on breast milk compared with infant formulas (J Senterre, J Rigo, G Forget, G Dandrifosse and N Romain, unpublished results). This difference does not seem to be present when powdered milk is supplemented with polyamines at the concentration found in breast milk; (4) spermine increases proliferation and differentiation of lymphocytes isolated from the tonsils of children. [less ▲]

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See detailAre there arguments suggesting that polyamines are preventive agents of food allergy ?
Dandrifosse, Guy ULg; Peulen, Olivier ULg; Khefif, N. El et al

in Proceeding of the COST 917 Meeting in Malaga (2000)

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See detailBiocompatibility of polyethylene glycols (PEG): An approach using bovine serum albumin (BSA) as a protein model.
Loret, S; Gilson, P; Barakat, I et al

in Pflügers Archiv : European Journal of Physiology (2000), 440

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See detailWHICH ARE THE ARGUMENTS ALLOWING TO PROPOSE THAT MILK POLYAMINES ARE PREVENTIVE AGENTS OF FOOD ALLERGY?
Dandrifosse, Guy ULg; Peulen, Olivier ULg; Kheffif, El et al

in European Commission Directorate General DG XII Sciences (2000)

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See detailPolycations: relationship between chemical structure and biological behaviour
Grandfils, Christian ULg; Peulen, Olivier ULg; Deloyer, P et al

in Biologically active amines in food (2000)

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See detailIntestinal maturation induced by spermine in young animals
Peulen, Olivier ULg; Deloyer, P; Grandfils, Christian ULg et al

in Livestock Production Science (2000), 66

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See detailAre there arguments suggesting that polyamines are preventive agents of food allergy?
Dandrifosse, Guy ULg; Peulen, Olivier ULg; El Khefif, Nor Eddine et al

in Morgan, D.; White, A.; Sanchez-Jimenez, F. (Eds.) et al COST 917 Biologically active amines in food. Volume IV (2000)

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See detailPolycations : relationship between chemical structure and biological behavior
Grandfils, Christian ULg; Peulen, Olivier ULg; Deloyer, Patricia et al

in Morgan, D.; White, A.; Sanchez-Jimenez, F. (Eds.) et al COST 917 Biologically active amines in food. Volume IV (2000)

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See detailLe point sur les polyamines
Dandrifosse, Guy ULg; Deloyer, P.; Grandfils, Christian ULg et al

in Revue Médicale de Liège (1999), 54(3), 175-83

Polyamines are ubiquitous substances. Their intracellular concentration is controlled quickly and rigorously by extremely sophisticated systems. It depends on metabolism and cellular permeability ... [more ▼]

Polyamines are ubiquitous substances. Their intracellular concentration is controlled quickly and rigorously by extremely sophisticated systems. It depends on metabolism and cellular permeability. Polyamines act as structural and functional elements in the cell (nucleic acid conformation, cytoskeleton, radioprotection, apoptosis, proliferation and differentiation of cells...). They also play a role in various diseases (origin of food allergy, cancers...). They present a great therapeutic interest (oncology, molecular transfer to cell nucleus, transfer across the blood-brain barrier, parasitosis, effects on NMDA and GABA receptors in the central nervous system...). [less ▲]

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See detailBiogenic amines in different types of Belgian beers: a first survey
Loret, S.; Bianchi, D.; Peulen, Olivier ULg et al

in Bardocz, S.; Koninckx, J.; Grillo, M. (Eds.) et al COST 917 Biogenically active amines in food. Volume III : Biologically active amines in food processing and amines produced by bacteria, and polyamines and tumour growth (1999)

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See detailAre there arguments allowing to propose that polyamines are preventive agents of food allergy
Dandrifosse, Guy ULg; Peulen, Olivier ULg; El Khefif, N et al

Conference (1998, November)

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See detailAmine polymers : relation : chemical structure
Grandfils, Christian ULg; Peulen, Olivier ULg; Deloyer, P et al

Conference (1998, November)

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See detailThe Relationship between Spermine Content of Human Milk During the First Postnatal Month and Allergy in Children
Peulen, Olivier ULg; Dewé, Walthère ULg; Dandrifosse, Guy ULg et al

in Public Health Nutrition (1998), 1(3), 181-4

DESIGN: Qualitative case study and mathematical model. SETTING: Belgium. OBJECTIVES: To evaluate the correlation between the polyamine mean concentration of the milk drunk during the first postnatal month ... [more ▼]

DESIGN: Qualitative case study and mathematical model. SETTING: Belgium. OBJECTIVES: To evaluate the correlation between the polyamine mean concentration of the milk drunk during the first postnatal month and the appearance of allergy in children who drank this milk. RESULTS: A model that describes the dependence of the allergy appearance with the spermine mean concentration of milk drunk during the first postnatal month was established. CONCLUSIONS: This model shows that 5.02 nmol ml(-1) of spermine is a critical value to prevent the appearance of allergy. [less ▲]

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See detailPolyamines as preventive agents of food allergy (CEE, COST 917)
Grandfils, Christian ULg; Peulen, Olivier ULg; Deloyer, P et al

Conference (1998, May)

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See detailComparison between the Natural Postnatal Maturation and the Spermine-Induced Maturation of the Rat Intestine
Peulen, Olivier ULg; Pirlet, Christine; Klimek, Monique ULg et al

in Archives of Physiology & Biochemistry (1998), 106(1), 46-55

In the suckling rats, orally provided spermine induced structural and biochemical changes in the intestine, which are characteristics of the postnatal maturation. This induced maturation was compared to ... [more ▼]

In the suckling rats, orally provided spermine induced structural and biochemical changes in the intestine, which are characteristics of the postnatal maturation. This induced maturation was compared to that occurring spontaneously. Eight mumol spermine were administered orally once a day, for one or three days, to suckling rats which were 11 days old at the beginning of the experiment. The animals were killed 0, 2, 4, 6, 8, 10 hours or 3 days after the first treatment. Control rats from the same litter were treated in the same way but received only the vehicle. In order to complete the study of the naturally occurring maturation, another group of rats was killed when they were 12, 13, 15, 16, 17, 18, 19, 20, 21 or 30 days old. Animal and intestine weights were measured. Disaccharidase specific activity, and protein, DNA and RNA contents were estimated in the small intestine. Histological and ultrastructural aspects of the intestinal mucosa were examined. For all these parameters, the maturation induced by spermine ingestion appeared close to that occurring naturally at weaning. Consequently, dietary spermine induces all the morphological and biochemical modifications characterizing the intestinal postnatal maturation in the suckling rat suggesting a role of the polyamines in the naturally occurring processes. [less ▲]

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See detailEffects of a long-term low-polyamine diet on biochemical parameters and polyamine content in different organs of the germ-free rat
Deloyer, Patricia; Peulen, Olivier ULg; Klimek, Monique ULg et al

in Bardocz, S.; White, A.; Hajos, G. (Eds.) COST 917 Biogenically active amines in food. Volume II : Metabolic effects of biologically active amines in food (1998)

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