What’s New in Nutrition? NJ Maxvold MD Associate Professor of Pediatrics Pediatric Critical Care Medicine DeVos Children’s Hospital

Nutrition and PCRRT Is there anything New? Current General Knowledge: Stress Response elicits change in Utilization of Fuel/Substrates: 1.Cellular (End Organ) Insulin Resistance, therefore hyperglycemia and altered cellular energetics 2.Fatty Acids increased utilization as Glucose Utilization becomes Inefficient 3.Protein metabolism shift from anabolism to catabolism 4.Phasic changes in metabolism during acute Illness

Nutrition and PCRRT Carbohydrate Utilization Limit of oxidation of Carbohydrate ~ 5 mg/kg/min of Glucose Hyperglycemia Insulin Resistance Gluconeogenesis

Nutrition and PCRRT Lipid Metabolism  Fatty Acid Utilization (major myocardial oxidation fuel) Mitochondrial adaptation to acute stress (Carnitine dependent enzymes) Calvani et al Basic Res Cardiol 2000 Mitochondrial control of FFA oxidation and CHO oxidation AcetylCoA/ CoA ratio on PDH Complex

Nutrition and PCRRT High Protein Catabolism Muscle Efflux of Amino Acids to fuel Gluconeogenesis Protein metabolism shift from anabolic to Acute phase proteins (Hepatic Inflammatory Response) Net Negative Nitrogen Balance

Critical Illness hormone changes -Acute: increase -Later: decrease ↑ cytokines Altered substrate utilization CHO: ↑hepatic gluconeogenesis (shift away from liver glycolysis) Hyperglycemia - Inefficient glucose oxidation - Insulin resistance - Shift in use of amino acids: gluconeogenesis + APR’s MALNUTRITION Acute Kidney Injury Uremia Acidosis Altered Glucose metab. Cytokines Impaired nutrient transport Inefficient/inadequate supply Impaired A.a. conversion ↓lipid oxidation

Nutrition and PCRRT Impaired Nutrient Support: Diminished Cellular Energy Inefficiency of normal cellular transport activities: Disturbances in the Na/K ATPase pump (energy dependent function) Intracellular mitochondrial adaptations (Dysfunctional electron transport respiration) Muscle wasting & Malnutrition  Mortality

Nutrition and PCRRT Adequate Calories: REE or Indirect Calorimetry ??Should we add % or More?? REE in Children : kcal/kg/d Briassoulis et al Crit Care Med 2000 MEE in Crit Ill Children: kcal/kg/d ?? How soon?? Heyland D et al JPEN Hrs

Indirect calorimetry AND CRRT IC: measure resting energy expenditure. Based on: Expired CO2 and O2 (O2 consumption + CO2 production). Potential problem with CRRT Hemofilter Dialysis fluid Effluent HCO3/CO2 fluxes May affect IC measurements. IC may not be reliable?

Nutrition and PCRRT Protein Support for Nitrogen Balance: Nitrogen Intake = Nitrogen Output Protein Catabolic Rate in AKI: Macias et al JPEN 1996 ~ g/kg/day Maxvold et al Crit Care Med 2000 ~ g/kg/day

Nutrition and PCRRT Can Nitrogen Balance be Achieved in AKI patients on CRRT? Conflicting Studies Bellomo et al Ren Fail 1997 Protein Intake : Nitrogen Balance 1.2 g/kg/d AA -5.5 g N /d 2.5 g/kg/d AA -1.9 g N /d

Does Increasing Protein Intake Help? Scheinkestel et al Nutrition critically ill adults on CRRT, protein intake 2.5 g/kg/day a) normal amino acid levels b) positive nitrogen balance. 50 critically ill adults on CRRT: 1.5 vs 2.0 vs 2.5 g/kg/day. NB related to protein intake. NB related to hospital stay Protein intake 2.5 g/kg/d: improved survival!

Protein and calorie prescription for children and young adults receiving CRRT: a report from the Prospective Pediatric Continuous Renal Replacement Therapy Registry group. Zappitelli et al, submitted. Protein intake (g/kg/day) Day of CRRT Daily change in protein prescription during treatment with CRRT.

Protein and calorie prescription for children and young adults receiving CRRT: a report from the Prospective Pediatric Continuous Renal Replacement Therapy Registry group. Zappitelli et al, submitted. Characteristics (N) Protein intake (g/kg/day) Initial Maximal Gender Males (111) Females (84) p-value 1 Age Group ≤ 1 year (35) 1 to ≤13 years (95) >13 years (65) p-value MODS (155) No MODS (40) p-value Survival Survivors (117) Non-survivors (78) p-value CRRT indication Electrolytes (31) Fluid overload (66) Electrolytes and f luid overload (98) p-value 1.4, 1.0[1.4] 2.0, 1.6[1.6] 1.3, 1.0[1.2] 1.9, 1.8[1.5] , 1.8[1.5] 2.5, 2.4[2.3] 1.3, 1.0[1.2] 2.0, 1.9[1.5] 1.4, 1.0[1.0] 1.6, 1.3[1.1] * 1.3, 1.0[1.2] 1.9, 1.8[1.5] 1.5, 1.0[0.8] 2.0, 1.3[1.7] , 1.0[1.2] 2.0, 1.6[1.5] 1.3, 1.0[1.3] 1.8, 1.8[1.7] , 1.0[0.9] 1.6, 1.4[1.1] 1.6, 1.2[1.2] 2.1, 1.8[1.8] 1.2, 1.0[1.3] 2.0, 1.8[1.6] All groups: -Maximal protein>initial Multivariate predictors of maximal protein intake - Younger age - Higher initial protein Rx - #CRRT days Protein Rx >2g/kg/day in 40%

Amino acid, trace metal and folate clearance by continuous renal replacement therapy in critically ill children. Zappitelli et al, submitted CVVHD initiation (N=15) Day 2 (N=15) Day 5 (N=9) Mean±SD, Median Mean±SD, Median Mean±SD, Median Protein intake (g/kg/d) N balance (g/kg/d) Caloric intake (kcal/kg/d) Caloric balance (kcal/kg/day) 1.98±1.24, ±1.02, ±0.60, 2.08 NA -0.88±1.60, ±0.19, ±27.6, ±22.3, ±18.4, ±25.4, ±21.7, ±17.7, Protein and energy intake and output at CVVHD1 initiation, Day 2 and Day 5. Maxvold et al, Crit Care Med, 2000 Protein intake was 1.5 g/kg/day – Negative nitrogen balance It’s not easy to achieve a positive nitrogen balance. Logic: bigger filter, higher Qd or Quf = increased clearance

Amino acid, trace metal and folate clearance by continuous renal replacement therapy in critically ill children. Zappitelli et al, submitted Amino Acid Day 2 (n=15) Day 5 (n=9) K 1 CVVHD CVVHD Losses K Renal (n=2) K CVVHD CVVHD Losses K Renal (n=3) (ml/min/1.73m 2 ) (mcg/kg/d) (ml/min/1.73m 2 ) Mean±SD, Median Mean±SD, Median Mean Tau Asp Thr Ser Asn Glu Gln Pro Gly Ala Cit Val Cys Met Ile Leu Tyr Phe Orn Lys His Arg 104.5±179.0, ±11.1, ±111.2, ±5.4, ±483.7, ±4.1, ±349.8, ±4.4, ±25.0, ±18.5, ±25.1, ±5.9, ±25.6, ±8.6, ±27.7, ±3.3, ±32.1, ±8.1, ±19.8, ±3.4, ±10.6, ±4.0, ±5.0, ±0.7, ±20.1, ±63.7, ±152.9, ±30.7, ±32.7, ±22.2, ±21.9, ±11.2, ±25.7, ±16.1, ±30.2, ±7.1, ±24.6, ±21.2, ±38.8, ±11.5, ±24.3, ±4.5, ±50.4, ±1.1, ±22.0, ±13.4, ±37.3, ±6.9, ±54.5, ±1.2, ±29.9, ±1.1, ±19.9, ±13.5, ±31.1, ±1.8, ±29.8, ±5.7, ±34.7, ±2.7, ±20.9, ±9.2, ±28.8, ±5.2, ±23.3, ±13.5, ±41.3, ±2.7, ±20.8, ±23.1, ±29.7, ±6.2, ±8.7, ±5.0, ±249.7, ±3.4, ±9.0, ±11.1, ±299.5, ±8.9, ±15.8, ±15.9, ±66.3, ±3.8, ±17.1, ±23.4, ±68.6, ±4.8, CVVHD clearance of amino acids measured on Day 2 and Day 5 N=15

Combined results of clearance of essential amino acids by CRRT. Zappitelli et al (submitted) and Maxvold et al, Critical Care, 2000 (n=6). Several studies, adult and child: ~ 10-20% intake “lost” through hemofilter. Both studies: Highest losses with Glutamine/Glutamic acid

Critical Illness – trace metals Deficiencies linked to: -Lymphocyte dysfunction -Cardiovascular dysfunction -Platelet activity -Antioxidant function -Wound healing

Amino acid, trace metal and folate clearance by continuous renal replacement therapy in critically ill children. Zappitelli et al, submitted K 1 Day 2 K Day 5 Serum concentrations ­­­­­­­­­­­­­­­­­­ _____________________ (ml/min/1.73m 2 ) (ml/min/1.73m 2 ) Initiation Day 2 Day 5 Reference range 2 Selenium Copper Chromium Zinc Manganese Folate 10.1±7.2, ±3.9, ±19, 49 61±24, 59 64±23, to 190 ( µ g/l) 0.4±0.3, ±0.46, ±21, 87 L 3 110±27, ±27, to 190 ( µ g/dl) 24.0±10.6, ±7.1, ±1, 2 2±1, 2 2±0.4, 2 0 to 2.1 ( µ g/l) 4.2±4.1, ±2.4, ±44, 53 L 68±28, 61 76±38, to 120 ( µ g/dl) 9.0±12.9, ±121.4, 5.1 9±16, 4 H 3 8±15, 3 H 8±15, 3 H 0 to 2 ( µ g/l) 29.4±54.9, ±3.2, ±12, 12 10±4, 9 8±2, to 40 (ng/l) Churchwell et al, NDT, 2007 Critically ill adults receiving CVVHD and CVVHDF Transmembrane clearances Much lower clearance of selenium and chromium Overall, trace metal clearance negligible.

CRRT-Vitamins Amino acid, trace metal and folate clearance by continuous renal replacement therapy in critically ill children. Zappitelli et al, submitted * *

Nutrition and PCRRT Berger et al AM J Clin Nutr º Balance Studies Intake (Replacement Fluid ) = Output (Effluent) [Se RF ] = [Se Eff ] µmol (2 x RI) [Cu RF ] = [Cu Eff ] µmol (0.3 x RI) [Vit B 1 RF ] = [Vit B 1 Eff ] mg (1.5 x RI) [Zn RF ] = [Zn Eff ] 20.7 µmol (1.5 x RI) Negative Balance for Se, Cu, VitB1 and Se and VitB1 Losses > 1.5 x the Recommended Intake

Critical Illness - Vitamins Water Soluble Vit B 1 Def Altered Energy Metabolism,  Lactic Acid, Tubular damage Vit B 6 Def Altered Amino acid and lipid metabolism Folate Def Anemia Vit C Def Limit 200 mg/d as precursor to Oxalic acid Potential for losses during CRRT.

Critical Illness - Vitamins Fat Soluble Vit D Def Hypocalcemia Vit A Excess  renal catabolism of retinol binding protein Vit E Def  >50% plasma and RBC

Critical Illness & AKI - Lipids  LDL and VLDL  Cholesterol and HDL-Cholesterol Impaired Lipolysis Lipase Activity ~50%  Lipoprotein Lipase  Hepatic Triglyceride Lipase

Nutrition and PCRRT Initial Nutritional Prescription for Kids with AKI on CRRT: Early Nutrition : hrs of PICU admission Enteral feeding + Parenteral feeding (often require partial Parenteral Nutrition early in acute illness) REE for age (without additional kcal % allowance) ( REE is already >33% Above mean MEE ) MEE if available

Initial Nutritional Prescription Pediatric AKI on CRRT Component Prescription: CHO Fat Protein Vitamins Trace elements Monitoring Consider 4-5 mg/kg/min Glucose support [ g/kg/d] (Insulin as needed for Hyperglycemia) 0.5-1g/kg/d 2 to 3 g/kg/day with AKI (Increase intake if on High flow CRRT (by 20%) Daily recommended intake (± replacement ) Monitor serum folate, water soluble vitamin levels Daily Recommended Intake MEE, Nitrogen Balance, Electrolytes, Vitamins, Trace elements -Pharmaconutrients: Glutamine, Ala, Se, Omega 3 FA, L-Carnitine, etc

Nutrition and PCRRT Future Development PharmacoNutrients: Gln Omega 3 Fatty Acids Arginine L-Carnitine Growth Factors

PharmacoNutrients Singer et al Intensive Care Med 2008 Omega-3 FA: Augment immune defense through inhibition of NF-kappaß Luiking st al Crit Care Med 2007 Kalil et al Crit Care Med 2006 Arginine: + Effect - Improved microcircuation, gut function, Plt and WBC Adherence,Endothelial function - Effect -Hemodynamic Instability,  Oxidative Stress Prevot et al Pediatr Nephrol 2009 Growth Factors (IGF-1, GH, Insulin )

Glutamine: Conditionally Essential Nutrient Substrate for Rapidly dividing cells(Kidney tubular cells, Enterocytes, Immune cells) Precursor for Glutathione Substrate for Gluconeogenesis Substrate for Ammoniagenesis Osmotic regulator, Precursor of purine/pyridimine

Potential Beneficial Effects of Glutamine Fuel for Enterocytes Lymphocytes NuclotideSynthesis Maintenance of Intestinal Mucosal Barrier Maintenance of LymphocyteFunction Preservation of TCA Function Decreased Free Radical availability (Anti-inflammatory action) GlutathioneSynthesis GLNpool Glutamine Therapy Enhanced Heat Shock Protein Shock Protein Anti-catabolic effect Preservation of Muscle mass ReducedTranslocation Enteric Bacteria or Endotoxins Reduction of Infectious complications Inflammatory Cytokine Inflammatory CytokineAttenuation Preserved Cellular Energetics- ATP content GLNPool Critical Illness Enhanced insulin sensitivity

CRISIS Trial: Multicenter Pediatric Trial of Enteral Se, Zn, Gln, IV Metoclopramide 1º Outcome: Time between PICU [DOA] and Infection [nosocomial or clinical] REDOXS Study: Multicenter Adult Trial 4 Treatment Arms: Gln; Gln and AntiOxidants; Antioxidants; Placebo Remember! Gln Loss on CRRT:15-20% of Total AA Clearance Glutamine Studies

Nutrition and PCRRT Carnitine Studies Conditionally Essential Supplement Improved Mitochondrial Cellular Energetics

Nutrition in PCRRT Carnitine Role in Cell Energetics: Facilitates Long Chain AcylCoA [transformed FattyAcids within cytosol] Diminishes Acetyl CoA/CoA Ratio - Improves the PDH Complex Activity Increases Pyruvate Oxidation and decreases Lactate Production

Nutrition in PCRRT That’s Enough for Now! Many Thanks and Gratitude : Dr. Bunchman Dr. Zappitelli My Associates in Michigan, especially the PICU nurses!