advancing the diagnosis, treatment and ... -...
TRANSCRIPT
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ISN Mission: Advancing the diagnosis, treatment
and prevention of kidney diseases in the developing and developed world
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Nutrition in Kidney Disease:Nutrition in Kidney Disease: How to Apply Guidelines to How to Apply Guidelines to
Clinical Practice?Clinical Practice?
T. Alp Ikizler, MD Catherine McLaughlin-Hakim Professor, Medicine
Vanderbilt University Medical Center
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Outline
Epidemiology
Dietary Protein Intake
Metabolic Derangements in CKD
Nutritional Support in ESRD
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Rates of Death and CV Events in Patients According to GFR
N = 1,120,295 adults; GFR = (estimated) glomerular filtration rate. *Age-standardized rates per 100 person-years; †CV event defined as hospitalization or coronary heart disease, heart failure, ischemic stroke, and peripheral arterial disease per 100 person-years. Go et al. N Engl J Med. 2004;351:1296-1305.
0.76 1.08
4.76
11.36
0
2
4
6
8
10
12
14
≥60 45-59 30-44 15-29 <15 R
ate
of D
eath
Fro
m A
ny C
ause
*
36.60
2.113.65
11.29
21.80
0
5
10
15
20
25
30
35
40
≥60 45-59 30-44 15-29 <15
Rat
e of
CV
Even
ts†
eGFR (mL/min/1.73 m2)
14.4
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The death rate of chronic dialysis patients is unacceptably high
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6
Complications of CKD and Progression to ESRD
ESRDESRD
6060 4040 2525 1515 55
GFR (mL/min/1.73 mGFR (mL/min/1.73 m22))
Incr
easi
ng S
ever
ity
Incr
easi
ng S
ever
ity
of C
ompl
icat
ions
of C
ompl
icat
ions
CKD ContinuumCKD Continuum
CKDCKD Anemia
Secondary hyperparathyroidism
Dyslipidemia
Hypoalbuminemia, malnutrition
CVD
Uremic Syndrome
AnemiaAnemia
Secondary hyperparathyroidismSecondary hyperparathyroidism
DyslipidemiaDyslipidemia
Hypoalbuminemia,Hypoalbuminemia, malnutritionmalnutrition
CVDCVD
Uremic SyndromeUremic Syndrome
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Uremic Ultrafiltrate Inhibits Nutrient Intake
Modified from Anderstam, Mamoun & Bergstrom JASN 1996
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Dietary Protein Intake During Progression of Renal Disease
Ikizler JASN 1995
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Protein and Amino Acid Turnover and Waste Protein and Amino Acid Turnover and Waste ProductsProducts
Mitch and IkizlerHandbook of Nutrition in CKD
PlasmaProteins0.5 kg
Free Amino Acid Pool῀
62 g kg
Diet Protein70 g/d
Nitrogen Excretion11.2 g N/d
3.7 –
4.7 g/kg/dCell Proteins
(5.8 kg)
Ribosome
Amino ProteinsAcids
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Rationale for Dietary Protein Restriction in CKDRationale for Dietary Protein Restriction in CKD
Ameliorate Uremic Syndrome (delay initiation)
Decrease load on remaining nephrons (preserve RF)
Improve proteinuria/albuminuria
Additive effect of ACE inhibitors
Improve Metabolic Profile
Improve insulin Resistance, Acidosis and Oxidative Stress
Decrease likelihood of patient death
Lack of serious objective reasons for not recommending
Adapted from Fouque & Aparicio., Nature Neph. Reviews 2007
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11
Progression -
mGFR Progression –
Renal Death
Study 1: 585 patients Study 2: 255 patients
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12
Mean effect: 0.53
mL/min/yr (95% CI, 0.08 to 0.98 mL/min/yr)
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13
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Dietary Protein Restriction in CKD: SummaryDietary Protein Restriction in CKD: Summary
There is ample evidence to indicate that dietary protein restriction
has several beneficial metabolic benefits.
Improve insulin resistance, metabolic acidosis and oxidant
stress
The overall effects on kidney function seems to be less than
expected based on strong animal data and pilot studies.
DPI improves proteinuria (15-30%), more so in NS.
Additive effect with ACE inhibition.
Unable to translate into significant clinical effect
Evidence to indicate harm is limited.
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15
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Inflammation and Oxidative Stress in Stage II thru IV Chronic Kidney Disease
Ramos, LF; et al. Determinants of Protein Oxidation in Stage II thru IV Chronic Kidney Disease; 11/2006
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0
20
40
60
80
100
0 5 10 15 20 25 30Follow-up Time (months)
Cum
ulat
ive
Surv
ival
(%)
0
20
40
60
80
100
0 5 10 15 20 25 30Follow-up Time (months)
Cum
ulat
ive
Surv
ival
(%)
Oxidative Stress and Mortality in CKDOxidative Stress and Mortality in CKD
0
20
40
60
80
100
0 500 1000 1500 2000 2500 3000 3500Observation Time (days)
Cum
ulat
ive
Surv
ival
(%)
DMA 16/C16:0 > medianDMA 16/C16:0 > median
DMA 16/C16:0 < medianDMA 16/C16:0 < median
p < 0.02p < 0.02
Vitamin C >60pmol/LVitamin C >60pmol/LVitamin C 32 to 60pmol/LVitamin C 32 to 60pmol/LVitamin C <32 pmol/LVitamin C <32 pmol/L
Stenvinkel et al, NDT 19(4): 972-976, 2004Stenvinkel et al, NDT 19(4): 972Stenvinkel et al, NDT 19(4): 972--976, 2004976, 2004Deicher, JASN 16: 1811-1818, 2005Deicher, JASN 16: 1811Deicher, JASN 16: 1811--1818, 20051818, 2005
p = 0.014p = 0.014
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A Proposed Mechanism for Uremia- Induced CVD Risk
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UremiaUremiaUremia Oxidative StressOxidative StressOxidative Stress
InflammationInflammationInflammation
Endothelial DysfunctionEndothelial DysfunctionEndothelial Dysfunction
Insulin ResistanceInsulin ResistanceInsulin Resistance
CVRiskCVCV
RiskRisk
AntioxidantsAntioxidants
Interventions Targeted at Non-Traditional CV Risk Factors in Uremia
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Tocopherols and Alpha Lipoic Acid Therapy (TALAT) in CKD Trial
l Randomized, double-blind, placebo-controlled trial
l N = 80 Stage 3-4 CKD patients
l Tocopherols + -lipoic acid vs. placebo x 8 weeks
l Primary endpoint, change in F2-isoprostanes
l Secondary endpoints−
Inflammatory biomarkers−
Insulin resistance−
Endothelial dysfunction
CH3CHCH33
H3CHH33CC
HOHOHO
OOO
CH3CHCH33
H3CHH33CC
HOHOHO
OOO
OHOHOH
OOO
SSS SSS
Ramos et al JRN 2010
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Tocopherols and Alpha Lipoic Acid Therapy (TALAT) in CKD Trial
Tocopherols + ALA(N = 29)
Placebo(N = 30)
Age (yrs) 59.3 ± 10.4 64.4 ± 9.0
Gender (% males) 15 (51.7%) 16 (53.3%)
Race (% White) 28 (96.6%) 28 (93.3%)
Diabetic (%) 16 (55.2%) 16 (53.3%)
BMI (kg/m2) 31.9 ± 7.2 32.3 ± 7.7
eGFR (ml/min) 38.1 ± 11.4 40.9 ± 14.8
Ramos et al JRN 2010
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TALAT in CKD Trial F2 -isoprostane
F2-Iso
0
0.02
0.04
0.06
0.08
0.1
0.12
Placebo VitE/ALA
F2-Is
opro
stan
es
Baseline
Month2
Ramos et al JRN 2010
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TALAT in CKD Trial F2 -isoprostane
CRP
0
5
10
15
20
25
30
35
Placebo VitE/ALA
CR
P Baseline
Month2
Ramos et al JRN 2010
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Variable Coefficient P-value 95% Confidence IntervalAge 0.001 0.500 -0.002 0.004
Gender 0.135 < 0.001 0.064 0.206Race -0.074 0.002 -0.120 -0.029
Diabetes -0.006 0.801 -0.051 0.039
Smoking History 0.060 0.091 -0.010 0.130Estimated GFR 0.000 0.760 -0.002 0.003
Total Cholesterol 1.35 x 10-5 0.971 -0.001 0.001
Serum Albumin -0.044 0.331 -0.132 0.045BMI 0.008 0.001 0.003 0.012
Dependent Variable: Plasma F2-Isoprostanes (log10 transformed)R2 for Model: 0.229
Multivariable Regression Model for Predictors for Elevated Plasma F2 - Isoprostanes
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1998
Obesity Trends* Among U.S. Adults BRFSS, 1990, 1998, 2007
(*BMI 30, or about 30 lbs. overweight for 5’4” person)
2007
1990
No Data <10% 10%–14% 15%–19% 20%–24% 25%–29% ≥30%
>300,000 deaths attributed to obesity
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27
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Janus: the god
of gates, doors, doorways, beginnings and endings.
TRANSITION TO ESRD
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Wasting/Cachexia
l AIDS: 5-15%
l Cancer: 20-50%
l Old age:
5-25%
l HD>CKD: 5-30%
l >30% muscle loss
n
Risk of deathn
Pneumonia
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Metabolic Paradigm for Uremic Wasting & Potential Targetes for Intervention
O’Sullivan, AJ, JJ Kelley. Kidney International 2007(71);98-100.
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Schematic representation of causes and manifestations of Schematic representation of causes and manifestations of PEW in Kidney DiseasePEW in Kidney Disease
ISRNM Position Paper ISRNM Position Paper -- Kidney InternationalKidney International
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Protein Balance in HumansProtein Balance in Humans
Protein synthesis
Protein Breakdown
n GrowthSynthesis>Breakdown
n WastingBreakdown>Synthesis
n Strategy: Maximize protein synthesisMinimize protein
breakdown
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IDPN and IDPO lead to significantly higher Whole-Body Protein Anabolism
* P<0.05 versus Control, # P<0.05 versus PO
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Caglar, Hakim, Ikizler Kidney Int, 2002
2
2.5
3
3.5
4
4.5
0 1 2 3 4 5 6months
Seru
m a
lbum
in (g
/dl)
N=85 N=68 N=61 N=49 N=48 N=42 N=39
22.5
33.5
44.5
55.5
66.5
7
Baseline 3-Month 6-Month
SG
A s
core
N=85 N=49 N=39
*
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AJKD 2005
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The French Intradialytic Nutrition The French Intradialytic Nutrition Evaluation study (FineS)Evaluation study (FineS)
• Follow-up: two years (treatment period + one year)• Visits at day 0 and month 3, 6, 12, 18 and 24
Oral suppl + IDPNduring one year
Oral supplduring one year
182patients
Malnourished
MHD patients
FineSFineS
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• Oral supplement: 5.4 kcal/kg/d0.42 g protein/kg/d
• IDPN : 13.8 kcal/kg/HD (5.9 kcal/kg/d)0.62 g AA/kg/HD (0.27 g AA/kg/d)
Nitrogen supply: standard AA solution
Energy supply: 50% standard fat emulsion50% glucose
Nutritional therapiesNutritional therapies
FineSFineS
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Results: Nutritional statusResults: Nutritional status
FineSFineSControl group IDPN group
Months0 6 12 18 24
30
34
Serum albumin, g/L
31
32
33
34
NS
Months0 6 12 18 24
30
34
Serum albumin, g/L
31
32
33
34
NS
Months
300
280
260
240
220
200NS
0 6 12 18 24
Serum prealbumin, mg/L
Months
300
280
260
240
220
200NS
0 6 12 18 24
Serum prealbumin, mg/L
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Mean cumulative survival: 77% at 1 yr, 58% at 2 yrDeath: Control: n = 36, IDPN: n = 40
Patient SurvivalPatient Survival
FineSFineS
0 200 400 600 Days
0.00
0.25
0.50
0.75
1.00
Logrankp = 0.33
Patie
nt c
umul
ated
surv
ival
NS
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l Oral versus oral and parenteral supplementation does not have any differential effect on survival and on nutritional markers in CHD patients l
Equal and adequate amounts of protein and calorie are provided in both groups
l Nutritional supplementation does improve nutritional markers l
If the targets of dietary protein and energy intake suggested by KDOQI (> 1.2 g/kg/d and > 30 kcal/kg/d, respectively) are achieved.
What are the significant observations in FINE studyWhat are the significant observations in FINE study? ?
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l These data are confirmatory of the appropriateness of the KDOQI dietary protein and calorie intake guidelines.
l Nutritional interventions in general are associated with improved survival in CHD patients. l
The study did not include a no-intervention arm.
What are the significant observations in FINE studyWhat are the significant observations in FINE study? ?
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UremicUremic Protein Energy Wasting SyndromeProtein Energy Wasting Syndrome
The etiology of Uremic Protein Energy Wasting Syndrome is multi-factorial (as in most chronic disease states)
dietary intake + HD-associated catabolism + Inflammation + Insulin resistance -> wasting in CHD patients ->
mortality and morbidity
Nutritional Interventions -> convenient and safe; IDPN and Oral supplements can partially reverse the HD-induced catabolism (primarily by
replenishing the amino acid pool)
Nutritional Interventions -> Potentially can save lives and lead to significant cost savings