Fosfomycin Trometamol Compared With an Alternative Active Antibiotic as Step-down Therapy for the Treatment of Acute Pyelonephritis Due to Escherichia Coli in Elderly Women : a Randomized, Multicenter, Non-inferiority Trial (FOSFOLD)
Fosfomycine trométamol comparé à un Autre Traitement Antibiotique Actif en Relais Pour le Traitement Des pyélonéphrites aiguës à Escherichia Coli Chez Les Femmes âgées : Essai randomisé, Multicentrique de Non infériorité
Acute pyelonephritis (APN) is among the most common bacterial infections in older women. Oral step-down antibiotic therapy may potentially be associated with toxicity, particularly with fluoroquinolones or trimethoprim-sulfamethoxazole, espcially in geriatric patients. The emergence of resistant strains reduces the choice of oral step-down treatment, thereby increasing the risk of nosocomial complications related to intravenous access and prolonged hospitalization.
Fosfomycin trometamol (FT) has broad activity against Enterobacterales, including resistant strains. It has an excellent safety profile and moderate ecological impact, and has been used for several years to treat cystitis. Recent studies have demonstrated its efficacy as an oral step-down therapy for the treatment of E.coli APN in younger women. Its efficacy in a geriatric population remains to be demonstrated.
The primary objective is to demonstrate the non-inferiority, in terms of clinical cure, of FT compared with an alternative active antibiotic as step-down therapy for E. coli APN in older women.
FOSFOLD is a national, multicenter, randomised, comparative, phase 3, non-inferiority trial (1:1), open-label with two parallel treatment groups. After 3 or 4 days of appropriate empirical antibiotic therapy, women aged 75 or over with E.coli APN will be randomised to receive either 3g of FT once daily or an alternative antibiotic treatment in accordance with current french guidelines, for a total of 10 days.
The primary endpoint is clinical cure at Day 17, i.e. 10 days after completion of antibiotic therapy.
If non-inferiority of FT is confirmed, it could provide a new therapeutic approach for oral step-down therapy in the older patients with APN. Its favorable tolerability profile could help prevent common geriatric complications, such as delirium, falls and malnutrition. Ultimately, it could help prevent some of the iatrogenic functional decline associated with hospitalisation.
Aperçu de l'étude
Statut
Statut
Les conditions
Les conditions
Intervention / Traitement
Intervention / Traitement
Type d'étude
Type d'étude
Inscription (Estimé)
Inscription
Phase
Phase
- Phase 3
Contacts et emplacements
Coordonnées de l'étude
Coordonnées de l'étude
- Nom: Jérôme Lambert, MD PhD
- Numéro de téléphone: +33 +33 1 42 49 97 42
- E-mail: jerome.lambert@u-paris.fr
Sauvegarde des contacts de l'étude
- Nom: Clara Pouchelon, MD
- Numéro de téléphone: +33 +33 1 40 36 73 67
- E-mail: clara.pouchelon@ght-gpne.fr
Critères de participation
Critère d'éligibilité
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Female.
- Age ≥ 75 years.
- Body temperature ≥ 38°C on at least once during the 72 hours preceding diagnosis.
- At least one new symptom among the following : urinary urgency, dysuria, increased urinary frequency, gross hematuria, burning on urination, spontaneous of provoked flank or suprapubic pain or urinary incontinence.
- Positive urine culture collected before initiation of antibiotic therapy defined as : ≥ 10,000 leukocytes/mL and monomicrobial culture with Escherichia coli ≥ 103 CFU/mL and susceptibility to FT,the empirical antibiotic,and at least one alternative antibiotic (active and not contraindicated), administered either orally (fluoroquinolone, amoxicillin, amoxicillin-clavulanic acid, or trimethoprim-sulfamethoxazole or, in the absence of an oral alternative, intravenously.
- Ability to reveive oral medication
- Favorable clinical course after 3 or 4 days of effective empirical antibiotic therapy, defined as resolution of fever (temperature < 38°C) and regression or reduction in the intensity and/or frequency of the clinical sign(s) present at the time of APN diagnosis, without the occurrence of any new symptoms.
Exclusion Criteria:
- Presence of an infectious focus other than the urinary tract.
- Severe infection and/or initial infectious complications, including septic shock, requirement for an emergency upper urinary tract intervention, or renal abscess.
- Indwelling urinary catheter, including bladder, ureteral, or nephrostomy catheters.
- Inability to take oral medication.
- Immunosuppression, including sold-organ transplant, ongoing immunosuppressive therapy, ongoing chemotherapy.
- Hypersensitivity to fosfomycin trometamol or to any of the excipients of the study medication
- End-stage chronic kidney disease with an estimated glomerular filtration rate (eGFR) < 15 mL/min/1.73 m2.
- Lack of health insurance coverage.
- Patient under legal protection or guardianship.
- Absence of written informed consent from the patient or, if the patient is unable to provide consent, absence of agreement from the designated trusted person or a close relative.
- Participation in another interventional clinical research protocole
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Aucun (étiquette ouverte)
Nombre de bras
Armes et Interventions
Groupe de participants / BrasGroupe de participants / Bras |
Intervention / TraitementIntervention / Traitement |
|---|---|
|
Expérimental: Fosfomycin-trometamol (FT)
|
One sachet (3g), once daily, orally for 6 or 7 days, following 4 or 3 days, respectivelly of effective antibiotic therapy, for a total of 10 days of effective antibiotic treatment. |
|
Comparateur actif: Alternative antibiotic treatment
|
Treatment will be selected at the investigator's discretion, in accordance with the 2017 recommandations of the French Society for Infectious Diseases (SPILF) and the 2025 French National Authority for Health (HAS) guidelines. Therapy will be administrated for 6 or 7 days (Day 1 - Day 6/7), following 4 or 3 days, respectively of effective antibiotic therapy. The total duration of effective antibiotic therapy will be 10 days. Injection antibiotic therapy will be offered in the absence of an active oral antibiotic option. |
Que mesure l'étude ?
Principaux critères de jugement
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Clinical resolution
Délai: Day 17
|
Clinical cure defined as :
|
Day 17
|
Mesures de résultats secondaires
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Occurence of antibiotic-related adverse events
Délai: Up to 37 days
|
Occurrence, nature, and severity of antibiotic-related adverse events, assessed using the National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE) scale. |
Up to 37 days
|
|
Occurence of geriatric complications
Délai: Up to 37 days
|
|
Up to 37 days
|
|
Functional autonomy
Délai: Up to 37 days
|
According to the Activities of Daily Living (ADL) scale: score ranges from 0 (complete dependence) to 6 (complete independence), with higher scores indicating greater independence in basic daily activities such as bathing, dressing, toileting, transferring and eating. |
Up to 37 days
|
|
Incidence of Infectious and urological complications
Délai: Up to day 7
|
|
Up to day 7
|
|
Cumulative incidence of recurrent febrile or non-febrile urinary tract infectious (UTIs) (relapse or reinfection)
Délai: From Day 17 to Day 37
|
|
From Day 17 to Day 37
|
|
Rate of hospitalization or rehospitalization following treatment for APN
Délai: Up to day 37
|
Up to day 37
|
|
|
Length of hospital stay following randomization
Délai: Up to day 37
|
Up to day 37
|
|
|
All-cause mortality
Délai: Up to day 37
|
Up to day 37
|
|
|
Rate of rectal colonization with antibiotic-resistant Enterobacterales
Délai: Up to day 37
|
fluoroquinolones, trimethoprim-sulfamethoxazole, fosfomycin, and third-generation cephalosporins |
Up to day 37
|
Collaborateurs et enquêteurs
Parrainer
Parrainer
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Estimé)
Début de l'étude
Achèvement primaire (Estimé)
Achèvement primaire
Achèvement de l'étude (Estimé)
Achèvement de l'étude
Dates d'inscription aux études
Première soumission
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Première publication
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour publiée
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
- Maladies urogénitales
- Maladies urogénitales masculines
- Maladies rénales
- Maladies urologiques
- Maladies urogénitales féminines
- Maladies urogénitales féminines et complications de la grossesse
- Infections
- Infections bactériennes et mycoses
- Infections bactériennes à Gram négatif
- Néphrite
- Infections à entérobactéries
- Néphrite interstitielle
- Pyélite
- Infections à Escherichia coli
- Infections bactériennes
- Pyélonéphrite
- Produits chimiques organiques
- Composés organophosphores
- Organophosphonate
- Fosfomycine
Autres numéros d'identification d'étude
Autres numéros d'identification d'étude
- APHP240802
Plan pour les données individuelles des participants (IPD)
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Informations sur les médicaments et les dispositifs, documents d'étude
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