The objective of this study is to describe the renal impact of Elexacaftor-Teacaftor-Ivacaftor, a triple modulator therapy of CFTR channel, in patients with cystic fibrosis. This new treatment acts on the CFTR channel, which is expressed at the level of the nephrons. The objective is to study the changes in plasma and urinary parameters, including metabolic explorations of urolithiasis, change in volemic parameters, renal function, urinary sediment and nutritional and glycemic parameters, in newly treated patients, through the data collected at introduction of the treatment and during the follow-up.
Study Type
OBSERVATIONAL
Enrollment
20
Collection of Uricuria, phosphaturie, calciuria, magnesuria, glycosuria, citraturia, oxaluria, before and after initiation of KAFTRIO
Arterial pressure, glycemia, glycated hemoglobin, lipid profile, weight, serum and urinary electrolytes, hepatic check, complete blood count, calcium phosphate balance and urinary sediment analysis before and after initiation of KAFTRIO
Centre Hospitalier Lyon Sud
Pierre-Bénite, France
RECRUITINGModification of the parameters of the lithiasis assessment
Change in blood phosphorus and calcium metabolism ; Change in calciuria mmol/d ;Change in urinary pH, urinary specific gravity (g/mL) and crystalluria
Time frame: 1 month after initiation of KAFTRIO
Modification of the parameters of the lithiasis assessment
Change in blood phosphorus and calcium metabolism ; Change in calciuria mmol/d ;Change in urinary pH, urinary specific gravity (g/mL) and crystalluria
Time frame: 7 months after initiation of KAFTRIO
Change in volemic parameter
body mass index (BMI) (kg/m²), systolic and diastolic blood pressure (mmHg), presence of orthostatic hypotension, renin and aldosterone levels and ratio (ng/L and pmol/L respectively), natremia (mmol/L), natriuresis (mmol/d), kalemia (mmol/L), kaliuresis (mmol/d), chloremia (mmol/L), bicarbonatemia (mmol/L), brain natriuretic peptid (ng/L), hemoglobin (g/L) and sodium intake estimated by the dietician and calculated thanks to natriuresis (g/d)
Time frame: 1 month after initiation of KAFTRIO
Change in volemic parameter
body mass index (BMI) (kg/m²), systolic and diastolic blood pressure (mmHg), presence of orthostatic hypotension, renin and aldosterone levels and ratio (ng/L and pmol/L respectively), natremia (mmol/L), natriuresis (mmol/d), kalemia (mmol/L), kaliuresis (mmol/d), chloremia (mmol/L), bicarbonatemia (mmol/L), brain natriuretic peptid (ng/L), hemoglobin (g/L) and sodium intake estimated by the dietician and calculated thanks to natriuresis (g/d)
Time frame: 7 month after initiation of KAFTRIO
Change in renal function
(measured using creatinine (µmol/L) and cystatin C (mg/L)combined to report 2021 CKD-EPIcreatinineand CKD-EPIcreatinine-cystatin C formulas) and in plasma urea levels (mmol/L).
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Time frame: 1 month after initiation of KAFTRIO
Change in renal function
(measured using creatinine (µmol/L) and cystatin C (mg/L)combined to report 2021 CKD-EPIcreatinineand CKD-EPIcreatinine-cystatin C formulas) and in plasma urea levels (mmol/L).
Time frame: 7 month after initiation of KAFTRIO
Change in urinary sediment
, represented by proteinuria (g/day), albuminuria/creatininuria ratio (mg/g) and urinary beta-2-microglobulin level (mg/day), after collecting 24-hours urine sa
Time frame: 1 month after initiation of KAFTRIO
Change in urinary sediment
, represented by proteinuria (g/day), albuminuria/creatininuria ratio (mg/g) and urinary beta-2-microglobulin level (mg/day), after collecting 24-hours urine sa
Time frame: 7 month after initiation of KAFTRIO
Change in glycemic profile
(fasting blood glucose level (mmol/L) and glycated hemoglobin (%)) and nutritional profile (albumin and pre-albumin in g/L).
Time frame: 1 month after initiation of KAFTRIO
Change in glycemic profile
(fasting blood glucose level (mmol/L) and glycated hemoglobin (%)) and nutritional profile (albumin and pre-albumin in g/L).
Time frame: 7 month after initiation of KAFTRIO
Change in lung function
predicted forced expiratory volume in 1 second (FEV1) (%) and peak expiratory flow (%)).
Time frame: 1 month after initiation of KAFTRIO
Change in lung function
predicted forced expiratory volume in 1 second (FEV1) (%) and peak expiratory flow (%)).
Time frame: 7 month after initiation of KAFTRIO