The arginase pathway of L-arginine metabolism of peripheral blood lymphocytes in patients with acne vulgaris
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Notice bibliographique
Résumé
The mechanisms of development of the inflammatory process of the pilosebaceous apparatus in patients with acnе vulgaris are not fully understood, and variations in bacterial colonization are one of the key elements of the inflammatory process. Under the pathological conditions caused by pus-forming cocci which induce the production of proinflammatory cytokines, there is an increase in arginase expression. The capacity for film formation in selected strains was determined by the cultural properties (increased viscosity of the colony biomass) and by differential interference contrast microscopy using a dark field condenser and fluorescence microscopy. Arginase activity (μmole urea/min•mg of protein) was determined spectrophotometrically at 520 nm on saponin-perimabilized lymphocytes of peripheral blood by the rate of urea formation. The cultures of film-forming and planktonic forms of Staphylococcus epidermidis and Staphylococcus aureus were isolated from purulent pustules of 44 patients, aged 18–30. 63.6% of clinical strains of film-forming staphylococci were isolated, out of which 15 strains (53.6%) were S. aureus and 13 strains (46.4%) S. epidermidias. It was found that the arginase activity in patients (film-forming S. aureus) was significantly higher than in practically healthy donors (control) and was equal to 0.262 ± 0.006 and 0.279 ± 0.005 (planktonic form of S. aureus) versus 0.087 ± 0.009 μmole urea / min∙mg of protein in the control. The arginase activity in patients (film-forming S. epidermidis) was significantly higher than in practically healthy donors and was equal to 0.281 ± 0.009 and 0.297 ± 0.006 (planktonic form of S. epidermidis) versus 0.087 ± 0.009 μmol urea / min∙mg of protein in the control. After the auto-vaccine therapy and the administration of the probiotic Lacidofil (Institut Rosell Inc., Canada), enzyme activity decreased significantly in both experiments, however it had not attained control levels. The enzyme activity decreased through the administration of a vaccine, which in turn has an immunomodulating and immunostimulating effect. In addition, comparing the data of the arginase activity after treatment in patients with S. epidermidis, there was a slight decrease in the enzyme activity. This result is probably due to the formed tolerance of the immune system to commensal microorganisms. It was found that all patients had a moderate dysbiosis, which was accompanied by a deficiency of the main normal symbionts of the intestine. After treatment, all patients experienced significant improvementst in the microbiocenosis of the intestine in the direction of normalization of parameters and improvement of the skin condition. Increase in arginase activity in patients with acne vulgaris indicates the competition of this enzyme with NO-synthases for the substrate L-arginine and the alteration of physiological reactions in the organism caused by staphylococci which induce the phagocytic response and the cytokines production of the humoral system.
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Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle