250 likes | 679 Views
Insulin detemir: more predictability . David Russell-Jones United Kingdom. Tuesday. Wednesday. Monday. Variability. CGMS plots for one patient on three successive days of once-daily NPH insulin. 20.0. 15.0. 10.0. Glucose concentration (mmol/l) . 5.0. 0.0. -5.0. 12:00 am. 8:00 pm.
E N D
Insulin detemir: more predictability David Russell-Jones United Kingdom
Tuesday Wednesday Monday Variability
CGMS plots for one patient on three successive days of once-daily NPH insulin 20.0 15.0 10.0 Glucose concentration (mmol/l) 5.0 0.0 -5.0 12:00 am 8:00 pm 12:00 am 4:00 pm 12:00 pm 4:00 am 8:00 am Time
Variability: types and measures Types of variability: • Between subject • Affects dose titration • Within subject • Affects glycaemic control throughout treatment Ways to measure variability • Standard deviation • Co-efficient of variation (CV) Standard deviation x 100 = Mean
70 60 50 40 CV (%) 30 20 10 0 Variability is particularly marked with basal insulin Pharmacodynamic variability2Glucose AUC (0–24hrs) Pharmacokinetic variability1 70 Insulin Cmax Insulin Tmax 60 50 40 CV (%) 30 20 10 0 NPH insulin Ultralente Lente NPH insulin Adapted from 1. Galloway JA et al. Diabetes Care 1981;4:366-76. 2. Scholtz HE et al. Diabetologia 1999;42(Suppl 1):A235.
PK/PD study of profiles of insulin detemir, NPH insulin and insulin glargine Randomisation Insulin glargine x 4 0.4 U/kg n = 16 Insulin detemir x 4 0.4 U/kg n = 18 NPH insulin x 4 0.4 U/kg n = 17 Euglycaemic clamp, parallel group, randomised, double-blind study with four identical doses given to each subject at four different dosing days Heise T et al. Diabetes 2004;53:1614-20.
Insulin detemir has lower PK variability than other insulins 40 NPH insulin 35 Insulin glargine 30 Insulin detemir 25 CV (%) 20 15 10 5 0 Ins AUC (0-12) Cmax PK parameters were not statistically analysed Heise T et al. Diabetes 2004;53:1614-20.
7 7 7 7 7 7 7 7 7 6 6 6 6 6 6 6 6 6 5 5 5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 3 3 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 8 16 0 0 0 0 0 0 0 8 8 8 8 8 8 8 16 16 16 16 16 16 16 24 24 24 24 24 24 24 24 24 0 8 16 Variability in basal insulin action NPH insulin insulin glargine insulin detemir Glucose infusion rate (mg/kg/min) Time (hours) Heise T et al. Diabetes 2004;53:1614-20.
7 7 7 7 7 7 7 7 7 6 6 6 6 6 6 6 6 6 5 5 5 5 5 5 5 5 5 4 4 4 4 4 4 4 4 4 3 3 3 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 8 16 24 0 0 0 0 0 0 0 0 8 8 8 8 8 8 8 8 16 16 16 16 16 16 16 16 24 24 24 24 24 24 24 24 Variability in basal insulin action NPH insulin insulin glargine insulin detemir Glucose infusion rate (mg/kg/min) Time (hours) Heise T et al. Diabetes 2004;53:1614-20.
Insulin detemir has a lower variability of action than other insulins p < 0.001 80 70 p < 0.001 60 50 (Glucose infusion rate AUC0–24) CV (%) 40 30 20 10 0 NPH insulin Insulin Insulin glargine detemir Heise T et al. Diabetes 2004;53:1614-20.
Insulin detemir (Levemir®): clinical study • 6-month multicentre, open, randomised 2:1, parallel trial in 747 subjects with type 1 diabetes • 92 sites in 11 countries Bedtime insulin detemir+ mealtime soluble (regular) human insulin (n=491) CGMS subset (n = 99) 3 weeks’ run in Bedtime NPH insulin + mealtime soluble (regular) human insulin (n = 256) CGMS subset (n = 39) Randomisation 6 months Russell-Jones D et al. Clinical Therapeutics 2004;26:724-36.
Fasting glucose is significantly improved with insulin detemir relative to NPH insulin Baseline HbA1c = 8.35% Russell-Jones D et al. Clinical Therapeutics 2004;26:724-36 *self-monitored. FBG, fasting blood glucose
Insulin detemir: consistent nocturnal profile Mean glucose Insulin detemir 10 180 NPH insulin 9 162 8 144 (mmol/l) (mg/dl) 7 126 6 108 0 0 20.00 22.00 0.00 02.00 04.00 06.00 08.00 Time CGMS profiles Russell-Jones D et al. Clinical Therapeutics 2004;26:724-36
Example profiles: interstitial glucose fluctuations from the mean Glucose 25 450 Patient 1 –NPH insulin 20 360 15 270 (mg/dl) (mmol/l) 10 180 5 90 0 0 Glucose 06:00 08:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00 02:00 04:00 06:00 450 25 Patient 2 – Insulin detemir 360 20 270 15 (mmol/l) (mg/dl) 180 10 90 5 0 06:00 08:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00 02:00 04:00 06:00 CGMS profiles Russell-Jones D et al. Clinical Therapeutics 2004;26:724-36 Time
Insulin detemir: reduced fluctuation in blood glucose Mean fluctuationfrom individual average bloodglucose Daytime Nocturnal 3 54 Insulin detemir 2 36 NPH insulin 1 18 (mg/dl) (mmol/l) 0 0 –1 –18 –2 –36 6 10 14 18 22 2 6 Time (hours) CGMS profiles Russell-Jones D et al. Clinical Therapeutics 2004;26:724-36
Glucose fluctuation is significantly less variable with insulin detemir ANOVA of fluctuations (mmol/l x h) over 24 hours (Data taken from 72-hour glucose profiles after 5 months of treatment) Russell-Jones D et al. Clinical Therapeutics 2004;26:724-36
Within-subject variability of self-monitored pre-breakfast glucose conc. all phase 3 studies **p<0.001; *p<0.05, insulin detemir vs. NPH Insulin detemir NPH insulin 5 ** ** ** ** ** ** ** * * 4 Studies in type 2 diabetes 3 SD of self-measured FBG/FPG (mmol/l) 2 1 0 Haak Vague Pieber Home Rašlová Robertson Kølendorf Hermansen Russell-Jones
Summary • Insulin detemir gives: • significantly lower fasting plasma glucose • significantly lower within-subject variation of fasting blood glucose • less fluctuation in blood glucose level acrossthe day and night More predictable glycaemic control
Potential benefits of More predictable glycaemic control • More confident patients? • Reduced hypoglycaemia? • Reduced weight gain?
Monday Predictability Tuesday Wednesday