Le point sur les polyamines

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 ▲]

Are there arguments allowing to propose that polyamines are preventive agents of food allergy

Conference (1998, November)

The Relationship between Spermine Content of Human Milk During the First Postnatal Month and Allergy in Children

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 ▲]

Comparison between the Natural Postnatal Maturation and the Spermine-Induced Maturation of the Rat Intestine

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 ▲]

Dietary polyamines during lactation

in Bardocz, Suzan; White, Ann (Eds.) Polyamines in health and nutrition (1998)

Caractérisation de l’expression de gènes du virus de la varicelle et du zona (VZV) durant la latence

Master's dissertation (1994)