questionsmedicales.fr
Enzymes et coenzymes
Enzymes
Hydrolases
Glycosidases
Galactosidases
beta-Galactosidase
Lactase
Lactase : Questions médicales fréquentes
Diagnostic
5
Intolérance au lactose
Tests de tolérance
Symptômes
Déficit en lactase
Antécédents médicaux
Symptômes
Symptômes
5
Intolérance au lactose
Symptômes
Syndrome du côlon irritable
Symptômes
Prévention
5
Prévention
Produits sans lactose
Étiquettes alimentaires
Lactose
Enfants
Intolérance au lactose
Habitudes alimentaires
Risque
Traitements
5
Traitements
Suppléments de lactase
Produits laitiers
Sans lactose
Régime alimentaire
Lactose
Complications
5
Complications
Carences nutritionnelles
Problèmes digestifs
Inconfort
Qualité de vie
Choix alimentaires
Complications psychologiques
Anxiété
Maladies secondaires
Conditions digestives
Facteurs de risque
5
Facteurs de risque
Antécédents familiaux
Antécédents médicaux
Maladies intestinales
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"@type": "Question",
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"@type": "Question",
"name": "Peut-on utiliser une biopsie intestinale pour le diagnostic ?",
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"@type": "Question",
"name": "Quels sont les principaux symptômes d'une intolérance au lactose ?",
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"name": "Peut-on confondre ces symptômes avec d'autres maladies ?",
"position": 9,
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"text": "Oui, les symptômes peuvent être similaires à ceux du syndrome du côlon irritable."
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"@type": "Question",
"name": "Les symptômes peuvent-ils s'aggraver avec l'âge ?",
"position": 10,
"acceptedAnswer": {
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"text": "Oui, la production de lactase peut diminuer avec l'âge, aggravant les symptômes."
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"@type": "Question",
"name": "Comment prévenir les symptômes d'intolérance au lactose ?",
"position": 11,
"acceptedAnswer": {
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"text": "Évitez les produits laitiers ou consommez des produits sans lactose pour prévenir les symptômes."
}
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{
"@type": "Question",
"name": "Les étiquettes alimentaires aident-elles à la prévention ?",
"position": 12,
"acceptedAnswer": {
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{
"@type": "Question",
"name": "Les enfants peuvent-ils développer une intolérance au lactose ?",
"position": 13,
"acceptedAnswer": {
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{
"@type": "Question",
"name": "Les tests de dépistage sont-ils recommandés ?",
"position": 14,
"acceptedAnswer": {
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}
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{
"@type": "Question",
"name": "Les habitudes alimentaires influencent-elles le risque ?",
"position": 15,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, une consommation excessive de lactose peut augmenter le risque d'intolérance."
}
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{
"@type": "Question",
"name": "Quels traitements existent pour l'intolérance au lactose ?",
"position": 16,
"acceptedAnswer": {
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}
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{
"@type": "Question",
"name": "Les produits laitiers sans lactose sont-ils efficaces ?",
"position": 17,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, les produits laitiers sans lactose sont une bonne alternative pour les intolérants."
}
},
{
"@type": "Question",
"name": "Les enzymes de lactase sont-elles disponibles en vente libre ?",
"position": 18,
"acceptedAnswer": {
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"text": "Oui, des suppléments de lactase sont disponibles en pharmacie pour aider à la digestion."
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{
"@type": "Question",
"name": "Le traitement peut-il inclure des changements alimentaires ?",
"position": 19,
"acceptedAnswer": {
"@type": "Answer",
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}
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{
"@type": "Question",
"name": "Les probiotiques peuvent-ils aider à la digestion du lactose ?",
"position": 20,
"acceptedAnswer": {
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}
},
{
"@type": "Question",
"name": "Quelles complications peuvent survenir avec l'intolérance au lactose ?",
"position": 21,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les complications incluent des carences nutritionnelles dues à l'évitement des produits laitiers."
}
},
{
"@type": "Question",
"name": "L'intolérance au lactose peut-elle causer des problèmes digestifs graves ?",
"position": 22,
"acceptedAnswer": {
"@type": "Answer",
"text": "En général, elle ne cause pas de problèmes digestifs graves, mais peut être inconfortable."
}
},
{
"@type": "Question",
"name": "Peut-elle affecter la qualité de vie ?",
"position": 23,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, l'intolérance au lactose peut affecter la qualité de vie en limitant les choix alimentaires."
}
},
{
"@type": "Question",
"name": "Les complications psychologiques sont-elles possibles ?",
"position": 24,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, l'anxiété liée à l'alimentation peut survenir chez certaines personnes intolérantes."
}
},
{
"@type": "Question",
"name": "L'intolérance au lactose peut-elle entraîner des maladies secondaires ?",
"position": 25,
"acceptedAnswer": {
"@type": "Answer",
"text": "Non, elle ne cause pas de maladies secondaires, mais peut aggraver d'autres conditions digestives."
}
},
{
"@type": "Question",
"name": "Quels sont les facteurs de risque de l'intolérance au lactose ?",
"position": 26,
"acceptedAnswer": {
"@type": "Answer",
"text": "Les facteurs incluent l'âge, l'origine ethnique et des antécédents familiaux d'intolérance."
}
},
{
"@type": "Question",
"name": "L'origine ethnique influence-t-elle le risque ?",
"position": 27,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, certaines ethnies, comme les Asiatiques et les Africains, ont un risque plus élevé."
}
},
{
"@type": "Question",
"name": "Les antécédents médicaux jouent-ils un rôle ?",
"position": 28,
"acceptedAnswer": {
"@type": "Answer",
"text": "Oui, des antécédents de maladies intestinales peuvent augmenter le risque d'intolérance."
}
},
{
"@type": "Question",
"name": "Les enfants sont-ils plus à risque ?",
"position": 29,
"acceptedAnswer": {
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"@type": "Question",
"name": "Le mode de vie influence-t-il le risque d'intolérance ?",
"position": 30,
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}
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}
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}
Expert en Médecine, Optimisation des Parcours de Soins et Révision Médicale
Validation scientifique effectuée le 18/04/2025
Contenu vérifié selon les dernières recommandations médicales
5 publications dans cette catégorie
Affiliations :
College of Pharmacy, Hunan University of Chinese Medicine, Changsha, Hunan, China.
Publications dans "Lactase" :
4 publications dans cette catégorie
Affiliations :
College of Pharmacy, Hunan University of Chinese Medicine, Changsha, Hunan, China.
Publications dans "Lactase" :
4 publications dans cette catégorie
Affiliations :
Hunan Key Laboratory of TCM Prescription and Syndromes Translational Medicine, Changsha, Hunan, China.
College of Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, China.
Publications dans "Lactase" :
4 publications dans cette catégorie
Affiliations :
College of Pharmacy, Hunan University of Chinese Medicine, Changsha, Hunan, China. xiaonenqun@sohu.com.
Publications dans "Lactase" :
3 publications dans cette catégorie
Affiliations :
Department of Genetics, Evolution and Environment, University College London Genetics Institute (UGI), London, UK.
Publications dans "Lactase" :
3 publications dans cette catégorie
Affiliations :
Human Evolution, Department of Organismal Biology, Uppsala University, Sweden.
SciLifeLab, Uppsala University, Sweden.
Palaeo-Research Institute, University of Johannesburg, Auckland Park, South Africa.
Publications dans "Lactase" :
3 publications dans cette catégorie
Affiliations :
State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China.
State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, and School of Life Sciences, Yunnan University, Kunming, Yunnan, China.
Center for Excellence in Animal Evolution and Genetics, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, China.
Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan, China.
Publications dans "Lactase" :
3 publications dans cette catégorie
Affiliations :
UC Davis Genome Center, Davis, CA, United States.
USDA ARS Western Human Nutrition Research Center, Davis, CA, United States.
Department of Nutrition, UC Davis, Davis, CA, United States.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
National Food Institute, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
National Food Institute, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark. chso@food.dtu.dk.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
Department of Biochemistry, University of Veterinary Medicine, Bünteweg 17, 30559 Hannover, Germany.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
Department of Biochemistry, University of Veterinary Medicine, Bünteweg 17, 30559 Hannover, Germany. Electronic address: Hassan.Naim@tiho-hannover.de.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
Fürst Medisinsk Laboratorium, Søren Bulls vei 25, 1051 Oslo, Norway.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
APHM, Timone Enfant, Service de pédiatrie multidisciplinaire, Marseille, France.
Aix Marseille Univ, INSERM, MMG, Marseille, France.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
Eco-Anthropologie (EA), Muséum national d'Histoire naturelle, CNRS, Université de Paris, Paris, France.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS - Université Lyon 1, Villeurbanne, France.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
Department of Genetics, Evolution and Environment, University College London, London, UK.
Palaeogenetics Group, Institute of Organismic and Molecular Evolution (iomE), Johannes Gutenberg University Mainz, Mainz, Germany.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
Department of Genetics, Evolution and Environment, University College London, London, UK. m.thomas@ucl.ac.uk.
UCL Genetics Institute, University College London, London, UK. m.thomas@ucl.ac.uk.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
UOC Clinic and Molecular Pathology, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy. patrizia.iardino@unicampania.it.
Publications dans "Lactase" :
2 publications dans cette catégorie
Affiliations :
Department Precision Medicine, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy. diego.pappalardo@unicampania.it.
Publications dans "Lactase" :
Primary lactose malabsorption is characterised by a down-regulation of lactase activity after weaning and inability to digest lactose in adulthood. It has been suggested that the historical introducti...
The study aims to estimate the prevalence of lactase non-persistence (LNP) among Greenlandic Inuit and Scandinavians living in Nuuk and East Greenland. The C to T transition in LCT - 13910 (rs4988235)...
Whole blood samples were collected from 535 participants, and rs4988235 was typed using a PCR-based method. Ethnicity was defined by parents' place of birth. Results were compared between East and Wes...
82.2% of the participants were Inuit, and 17.8% were of Scandinavian ancestry. Among Inuit, 88.5% had LNP compared to 7.5% among Scandinavians (...
The difference in LNP between East and West Greenland and the Inuit and Scandinavian population found in our study suggests that the original Inuit population was lactose maldigesters. Our findings su...
Lactase persistence/persistent (LP), the ability to express the lactase enzyme in adults, is one of the most strongly selected phenotypes in humans. It is encoded by at least five genetic variants tha...
Lactase persistence is an autosomal dominant trait characterized by sustained expression of lactase gene throughout adulthood. This trait is mostly prevalent in populations with pastoral or agro-pasto...
Lactose intolerance is defined as the presence of gastrointestinal symptoms, such as bloating, abdominal pain or diarrhoea, after consumption of lactose in individuals with lactose malabsorption. Most...
In this retrospective, observational study, patients aged 15 years or older were included after presenting to their treating physician with symptoms suggestive of lactose intolerance. HBT, including a...
1101 patients were included (29% men). Positive and negative predictive value, sensitivity and specificity of HBT versus DNA genotyping were 80% (CI 75-84), 97% (CI 96-98), 89% (CI 84-92) and 94% (92-...
In a population with a high prevalence of lactase-persistent alleles, we advise to exclude HBT from the diagnostic route for suspected lactose intolerance, and replace it with genotyping of lactase-pe...
Infantile colic is a common problem during the first three months of life. This randomized, double-blind, placebo-controlled trial conducted in an urban hospital in Delhi, India evaluated the efficacy...
One hundred sixty-two clinically healthy infants aged < 5 months age [mean (SD) = 63.5 (30.5) days] fulfilling the Rome-IV diagnostic criteria for infantile colic were enrolled. Eligible children were...
At the end of four weeks, mean (SD) crying or fussing time (min/d) was significantly shorter in infants receiving lactase in comparison to placebo [89.9 (115.2) vs.178.5 (153.2); P = 0.001]. The mean ...
Oral lactase treatment in infantile colic results in symptomatic relief in terms of shortening of duration of crying or fussing, and better parental satisfaction....
Clinical trial registry of India (CTRI/2017/12/010930) registered on 20/12/2017....
Excessive fat and protein in food can cause diarrhea by disturbing the intestinal microecology. Lactase is a functional enzyme strongly associated with diarrhea, while lactase bacteria in the intestin...
Operational Taxonomic Units (OTUs) were 23 and 31 in the normal group (NM) and model group (MD), respectively, and 11 of these were identical. The Chao1 and Observed specie indexes in the MD were high...
Our data demonstrate that HFHPD altered the community structure of lactase bacteria in the intestinal mucosa, decreased the abundance of the critical lactase bacteria, and promoted the occurrence of d...
Lactase persistence (LP) is a heritable trait in which lactose can be digested throughout adulthood. Lactase nonpersistent (LNP) individuals who consume lactose may experience microbial adaptations in...
The objective of the study was to estimate lactose from foods reported in the Automated Self-Administered 24-Hour Dietary Assessment Tool (ASA24) and determine the interaction between lactose consumpt...
Average daily lactose consumption was estimated for 279 healthy US adults, genotyped for the lactase gene -13910G>A polymorphism (rs4988235) by matching ASA24-reported foods to foods in the Nutrition ...
Across a diverse set of ethnicities, LP subjects consumed more lactose than LNP subjects. Lactobacillaceae abundance was highest in LNP subjects who consumed more than 12.46 g/d (upper tercile). Withi...
Elevated lactose consumption in individuals with the LNP genotype is associated with increased abundance of family Lactobacillaceae and Lachnospriaceae, taxa that contain multiple genera capable of ut...
Lactose intolerance is a widespread problem that affects people of many different races all over the world. The following pharmacological supplements can improve the lives of those who suffer from thi...
This work focused on lactase producer isolation and statistical design (Plackett-Burman, and BOX-Behnken) to maximize the effectiveness of environmental factors. A lactase-producing bacterium was chos...
The most critical variables that lead to increased lactase synthesis are glucose, peptone, and magnesium sulfate (MgSO...
According to this study,...
Lactase persistence (LP) - the genetic trait that determines the continued expression of the enzyme lactase into adulthood - has undergone recent, rapid positive selection since the advent of animal d...