whats new in diabetes? dr simon page consultant diabetologist nottingham university hospitals trent...
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Whats new in Diabetes?
Dr Simon PageConsultant Diabetologist
Nottingham University Hospitals
Trent Occupational Medicine Symposium 2011
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Agenda• Diabetes and CVD
– Recent epidemiological data• Diagnosis – changes afoot• HBA1c changes• Treatments
– ‘CV’ drugs and diabetes risk – implications for management• Recent CV outcome trials and implications
– UKPDS– ACCORD/ADVANCE/VADT– Meta-analyses
• New/emerging diabetes therapies– Incretin system– Dual αγ PPAR agonists– SGLT2 inhibitors
• Diabetes and Employment– Driving and diabetes
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Profile of Patients with T2D• Relative (parent or sibling)
with T2D• Higher risk ethnic groups• Obesity (especially
abdominal adiposity)• Previous IGT, IFG or
gestational diabetes• Dyslipidaemia
TG + small, dense LDL-C HDL-C
• Sedentary lifestyle• Cigarette smoking• Small birth weight
1. Adapted from Krentz & Bailey. In: Type 2 diabetes in practice 2005 pp9–10
2. Haffner SM et al. Diabetes Care 1999; 22, 4: 567
92% of T2D patients have insulin resistance2
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UK Trends for Diabetes
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
1960 1980 1996 2008 2025
Pa
tie
nts
(mill
ion
s)
Total Number With Diabetes
Diabetes UK Report “Diabetes in the UK” (2009)
Equivalent to 3.9% of the population
Pre
vale
nce
( %
of
po
pu
lati
on
)
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Diabetes and survival
SMR for Diabetes and risk of death from:
Any cause 1.80 Cancer 1.25 Vascular causes 2.32Other causes 1.73
A 50 year old with diabetes died on average 6 yrs earlier than a non-diabetic subject.
~ 60% attributable deaths vascular~ 40% of non vascular deaths
ERFC NEJM 2011, 364, 829-841
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Diabetes and CV risk
HRs for CHD and ischaemic stroke in diabetes vs non diabetes, progressively adjusted for baseline levels of conventional risk factors
Analysis based on 264,353 participants (11 848 cases) for CHD and 157,315 participants (2858 cases) for ischaemic stroke with complete information on all covariates listed.
ERFC. Lancet 2010, 375, 2215-2222
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Proteinuria
Baseline CV diseaseEvent rates/1000 patient yrs Present Not presentAll cause death 28.9 10.0
CV death 16.7 3.6
MI 23.1 5.2
Stroke 12.1 5.4
Proteinuria
Event rates/1000 patient yrs Present Not present
All cause death 39.9 6.3
CV death 18.7 1.2
Preiss et al., 2011, AHJ 2011, 161, 2010-2019
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Diagnosis
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HBA1c ≥ 6.5%
WHO/NMH/CHP/CPM/11.1 – Jan 2011
Stringent quality assurance tests are in place
Assays are standardised to criteria aligned to the international reference values
No conditions present which preclude accurate measurement.
A value less than 6.5% does not exclude diabetes diagnosed using glucose tests
The expert group concluded there is currently insufficient evidence to make any formal recommendation on the interpretation of HbA1c levels below 6.5%
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Assessment of glucose toleranceDiagnostic category
Fasting glucose
2hr post 75G glucose
Random HBA1c
Normal < 5.6 < 7.8
IFG 6 - 6.9 < 7.8
IGT < 7.0 ≥ 7.8 - 11.0
IFG + IGT 6 - 6.9 ≥ 7.8 - 11.0
Diabetes ≥ 7.0 ≥ 11.1 ≥ 11.1 ≥ 6.5%F
ast
ing
Glu
co
seF
ast
ing
Glu
co
se
(mm
ol/l
)(m
mo
l/l)
3.5
4.5
5.5
6.5
7.5
8.5
3 4 6 8 10 12 14
2-h Postload Glucose2-h Postload Glucose (mmol/l)(mmol/l)
Diabetes
IFG + IGT
NormalGlucose
IGT
IFG
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HBA1c changes
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HBA1c
% Mmol/molDCCT (%) IFCC-HBA1c (mmol/mol)
6.0 42
6.5 48
7.0 53
7.5 59
8.0 64
9.0 75
10.0 86
11.0 97
Two minus two
rule
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Treatment
More than managing glucose
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Benefit of different interventions per 200 diabetic patients treated for 5 yrs
-14
-12
-10
-8
-6
-4
-2
0
2
4
CV
ev
en
ts
Per 4mm lowerSBP
Per 1 mmol/l lowerLDL-C
Per 0.9% lowerHBA1c
-12.5 -8.2 -2.9
Ray et al., Lancet 2009, 373, 1765-1772
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Antihypertensive therapy,
Lipid lowering therapy and
Diabetes Risk
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Emergent diabetes mellitus with antihypertensive treatment
Messerli F H et al. Circulation 2008;117:2706-2715Copyright © American Heart Association
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Step 4
Draft 2011 NICE guidelines
Aged over 55 years or black person of African or Caribbean family origin of any age
Aged under55 years
C2A
A + C2
A + C + D
Resistant hypertension
A + C + D + consider further diuretic3, 4 or alpha- or
beta-blocker5
Consider seeking expert advice
Step 1
Step 2
Step 3
KeyA – ACE inhibitor or low-cost angiotensin II receptor blocker (ARB)1 C – Calcium-channel blocker (CCB) D – Thiazide-like diuretic
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Statin Odds ratio (95% CI)
Overall (n=91 140) 1.09 (1.02–1.17)
Atorvastatin only (n=7773) 1.14 (0.89–1.46)
Simvastatin only (n=18 815) 1.11 (0.97–1.26)
Rosuvastatin only (n=24 714) 1.18 (1.04–1.33)
Pravastatin (n=33 627) 1.03 (0.90–1.19)
Lovastatin (n=6211) 0.98 (0.70–1.38)
Statins and emergent diabetes
Sattar N et al. Lancet 2010; available at: http://www.lancet.com.
NNT prevent 1 CV event 155‘cause’ 1 case new diabetes 498
12% increase in diabetes risk with high dose statins
Preiss D et al. JAMA 2011; 305:2556-2564
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Glucose control and CV outcomes
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‘Legacy’ Effect - UKPDS
1977-1991Randomization
199720 years (Trial end)
200730 years
Intensive vs conventional treatment
10-year Post Trial Follow-up(non-interventional)
*p<0.05**p=0.052 – intensive vs conventional treatment
UKPDS=UK prospective diabetes study Holman R et al. UKPDS 80. NEJM 2008; 359: 1577–1589.
12%*
25%*
16%**
9%*
24%*
15%*
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ResultsTrial / (enrolled)
Mean age / dis duration
Aic at entry
Aic C Aic I Micro Macro SevereHypo
UKPDS
(5,102)
53
New Δ
7.1% 7.9% 7.0% +/- I 1.8%
C 0.7%
ADVANCE
(11,140)
66
10 yrs
7.5% 7.3% 6.5% Renal
I 0.7%
C 0.4%
VADT
(1,792)
60
11.5 yrs
9.4% 8.4% 6.9% I ?
C ?
ACCORD
(10,251)
62
10 yrs
8.1% 7.5% 6.4% I 3.1%
C 1.0%Excess deaths: All causes 257 vs 203 (p=0.04)
CV death 135 vs 94 (p=0.02)
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Cochrane metaanalysis 2011Outcome Comparative risks / 1000 RR
(95% CI)
P value
No of patients
Median follow-up
Conventional Intensive
All cause mortality 88 89
1.01
(0.9-1.13)
P=0.92
29731 23.1 mths
CV mortality45 48
1.06
(0.9-1.26)
P=0.46
29731 23.1 mths
Non-fatal MI48 42
0.87
(0.76-1.0)
P=0.054
29174 51 mths
Severe Hypoglycaemia 30 61
2.05
(1.39-3.02)
P=0.00031
28127 35 mths
Hemmingsen et al., Cochrane Library 2011,
10.1002/14651858.CD008143.pub2
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Risk benefit and duration of disease
Hazard ratio
1.0
Duration of diabetes
Higher risk of harm
Individualise HBA1c targets
Previous IHD
High CV risk
As tight glycaemic control as possible for as long as possible as soon after diagnosis as possible
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Update on T2D therapy
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Currently Available Treatments for Glycaemic Control in T2D
DDP-4=dipeptidyl peptidase-4; GLP-1=glucagon-like peptide-1; T2DM=Type 2 diabetes mellitusAdapted from Cheng AY, Fantus IG. CMAJ 2005; 172: 213–226.
-glucosidase inhibitorsDelay intestinal carbohydrate digestion and absorption
PioglitazoneIncrease insulin sensitivity and glucose uptake in skeletal muscle. Decrease lipolysis in adipose tissue and decrease hepatic glucose output.
Sulphonylureas and MeglitinidesIncrease insulin secretion from pancreatic -cells
Biguanides (metformin)Decrease hepatic glucose production and increase glucose uptake
InsulinsIncrease glucose uptake in skeletal muscle and reduce hepatic glucose production
GLP-1 agonists
Improve glucose-dependent insulin secretion, suppresses glucagon secretion, slow gastric emptying
DPP-4 inhibitorsProlong GLP-1 action, stimulate insulin secretion, suppress glucagon release
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Sulphonylurea – slim, metformin-intolerant, rapid response needed
Glinide – erratic lifestyleGliptin / glitazone – risk of hypos/job/age
Sitagliptin / glitazone – if insulin unacceptableGLP1 agonist – obesity or insulin unacceptable
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T2D drug problemsMetformin GI side effects, C/I in CKD4, B12 deficiency,
lactic acidosis (rare)
Sulphonylureas/
Glinides
Hypoglycaemia, weight gain, ?CV risk
Acarbose GI side effects, poorly tolerated
Pioglitazone Weight gain, fluid retention, heart failure, anaemia, fractures, ca bladder
Insulin Hypoglycaemia, weight gain, compliance, regimens can be complex
DPP4 inhibitors Nasal congestion, concerns over potential ca pancreas risk
GLP-1 analogues GI side effects, pancreatitis, concerns over potential ca pancreas risk, C/I in CKD 3B/4
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Incretin pathway
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GLP-1: The Glucoregulatory Role of Incretins
HypothalamusPromotes satiety and
reduces appetite
GLP-1: Glucagon-like peptide 1Adapted from Flint A, et al. J Clin Invest. 1998;101:515-520; Adapted from Larsson H, et al. Acta Physiol Scand. 1997;160:413-422; Adapted from Nauck MA, et al. Diabetologia. 1996;39:1546-1553; Adapted from Drucker DJ. Diabetes. 1998;47:159-169.
-cells:Enhances glucose- dependent insulin
secretion
-cells:↓ Postprandial
glucagon secretion
Stomach: Slows gastric
emptying
GLP-1 secreted upon the ingestion
of food
Other effects
? Skeletal muscle? Adipose Tissue
Cardiac TissuePulmonary
Liver: ↓ Glucagon reduces
hepatic glucose output
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GLP-1 HAEGT FTSDV SSYLE GQAAK EFIAW LVKGR
DPP-IV
EXENATIDELIRAGLUTIDE
DPP-IV inhibitor GLIPTINS
EXENDIN-4 HGEGT FTSDL SKQME EEAVR LFIEW LKNGG PSSGA PPPSG
Mechanisms for glucose lowering utilising the incretin effect
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GLP-1 analogues: benefits
Data on file (Composite Endpoint/01/02), Novo Nordisk
Glargine 24 IU
Rosiglitazone 4 mg
Glimepiride 4 mg
Exenatide 10 μg BID
Liraglutide 1.8 mg
25%
70%
72%
75%
Liraglutide 1.2 mg
27%
15%
HbA1c increaseHbA1c decrease
Weig
ht
loss
Weig
ht
gainConsistent effect on BP
SBP/DBP ~ 5/3 mmHg
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What about insulin resistance?
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Insulin resistance - optionsLifestyle
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Dual α/γ agonists - Aleglitazar
Improved management of dyslipidemia, associated with
PPAR α activation.
Improvements in insulin sensitivity associated with
PPAR γ activation.
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SGLT2 inhibitors
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Glucose Transporters in the Renal Proximal Tubule in Normal Individuals
Bays H. CMRO. 2009;25:671-681.
•SGLTs 1 – 6 – active energy dependent glucose transporters
•SGLT 1 – low capacity/high affinity: Intestine
•SGLT 2 – high capacity/ low affinity : Kidney
•SGLT 3 – widespread glucose sensor
•SGLTs 4 – 6 – roles to be defined
SGLT2 receptors up-regulated in diabetes,
increasing glucose reabsorption
Familial renal glycosuria – nonsense mutation in SGLT2
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SGLT2 Inhibition - Dapagliflozin
Benefits• ↑ glucose control
independent of insulin• Can be used in T1D and
T2D• Low risk of
hypoglycaemia• Weight loss• Consistent fall in BP ~ 6/3
mmHg
Potential Side Effects• Polyuria• Recurrent UTI• Dehydration• Electrolyte imbalance
Problems• Less effective in CKD 3B
and greater• FDA concerns over ca
bladder/breast
Canagliflozin and Empagliflozin in phase III trials, 8 others in phase 1/2 studies
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14 ongoing hard end point trialsACE Acarbose vs usual care T2D at high CV risk
ALLECARDIO Aleglitazar vs placebo T2D, recent ACS
CANVAS Canagliflozin vs placebo T2D at high CV risk
CAROLINA Linagliptin vs placebo T2D
ELIXA Lixesenatide vs placebo T2D, recent ACS
EXAMINE Alogliptin vs placebo T2D
EXSCEL Exenatide vs usual care T2D, low and high risk groups
IRIS Pioglitazone vs placebo Insulin resistant, non diabetic, recent stroke or TIA
LEADER Liraglutide +/- standard care T2D at high CV risk
LOOKAHEAD Intensive lifestyle vs diabetes support and education
T2D
ORIGIN Glargine vs placebo; omega 3 fatty acids vs placebo. 2x2 factorial.
IGT, IFG or recent diabetes
REWIND Dulagutide vs placebo T2D at high CV risk
SAVOR-TIMI 53 Saxagliptin vs placebo T2D at high CV risk
TECOS Saxagliptin vs usual care T2D at high CV risk
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Diabetes and Employment
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Diabetes and Employment• 608 diabetic, 25554 non-diabetic subjects• RR unemployment
• With complications RR 2.07 (CI 1.49-2.87) • Without complications RR 1.20 (0.93-1.56)Kraut et al., Diabetes Care 2001, 24, 64-68
• 400 diabetic, matched non-diabetic subjects• Sickness absence diabetes 31.7 days: non-diabetes 16.6
days
Skerjanc Occup Environ Med 2001, 58, 432-436
• Metaanalysis: diabetes and socioeconomic position.– High education income – lower levels 1.41 increase with diabetes– Occupation - lower grade 1.31 increase with diabetes– Income – lower level 1.40 increase with diabetes
Aquard et al., Int J Epodemiology 2011, 40, 804-818
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Diabetes and Employment• Individualised assessment
– Requirements of the job– Treatment/monitoring demands– Risk of hypoglycaemia with treatment– Complications and their impact– Safety considerations– Employer accommodating management needs
• Testing• Insulin administration• Meals/breaks• Shift patterns
Employment and diabetes: Patient guide www.diabetes.org.uk
General guidelines Diabetes Care 2010, 33, S82-S86
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Diabetes and Driving
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Diabetes and driving• Oct 2011: Insulin treated
patients:– May apply for Group 2 licence– No hypoglycaemia needing
assistance in preceding 12 mths
– Full hypo awareness– Regular monitoring– Memory meter– Understanding of hypo risks– No complications which would
barr driving
– Annual review from an INDEPENDENT Consultant Diabetologist
Group 2 entitlement
Since 1991 – patients on insulin barred from holding Group 2
licence
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Diabetes and Driving
• Group 2 licence – on SU/glinides– No hypoglycaemia needing
assistance in preceding 12 mths
– Full hypo awareness– Regular monitoring– Understanding of hypo
risks– No complications which
would barr driving– Regular medical review
• Group 2 licence – on other OHA or non-insulin injectables– Licence granted unless
they have driving relevant disabilities
– Advised to monitor blood glucose levels especially at times relevant to driving
– Regular medical review.
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Driving
• Cannot drive Police, Ambulance or Health Service vehicles if insulin-treated.
• Taxis– Regulated by local councils– DVLA recommend Group 2
regulations– Inconsistently applied in
England• 50% of local councils permit
insulin-treated patients to hold a Taxi license
• ? Impact of new Group 2 regulations
![Page 47: Whats new in Diabetes? Dr Simon Page Consultant Diabetologist Nottingham University Hospitals Trent Occupational Medicine Symposium 2011](https://reader035.vdocument.in/reader035/viewer/2022062408/56649de45503460f94adb92e/html5/thumbnails/47.jpg)
Take home messages• HBA1c 6.5% or more accepted for diagnosis
• HBA1c units changing
• Control BP and lipids – new BP guidelines
• Intensive control does not reduce CVD in patients with established T2D
• New therapies may offer advantages
• Driving regulations have changed.
Thanks for your attention