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DIETARY FATTY ACIDS: MORE THAN ENERGY

DIETARY FATTY ACIDS: MORE THAN ENERGY. Anton C. Beynen Professor of animal nutrition Wageningen University (1987-1992), University of Indonesia (1991-1993), Utrecht University (1993-2007), Rajamangala University (2006-now), King Saud University (2009-now). Omega- or methyl end.

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DIETARY FATTY ACIDS: MORE THAN ENERGY

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  1. DIETARY FATTY ACIDS: MORE THAN ENERGY Anton C. Beynen Professor of animal nutrition Wageningen University (1987-1992), University of Indonesia (1991-1993), Utrecht University (1993-2007), Rajamangala University (2006-now), King Saud University (2009-now)

  2. Omega- or methyl end NOMENCLATURE OF FATTY ACIDS CH3-C-C-C-C-C……….-COOH • Number of C atoms • Number of double bonds • Position of first double bond from the methyl end (omega end)

  3. n-6 fatty acids Common structure: CH3-C-C-C-C-C=C….COOH Linoleic acid (C18:2n-6): CH3-C-C-C-C-C=C-C-C=C-C-C-C-C-C-C-C-COOH n-3 fatty acids CH3-C-C=C…..COOH Common structure: a-linolenic acid (C18:3n-3): CH3-C-C=C-C-C=C-C-C=C-C-C-C-C-C-C-C-COOH

  4. SYMPTOMS OF ESSENTIAL FATTY ACID DEFICIENCY • – n-6 (omega-6)Polyunsaturated fatty acids • Dermatitis • – n-3 (omega-3)Polyunsaturated fatty acids • Impaired visual acquity • Impaired learning behaviour

  5. RELATIONSHIP BETWEEN THE LEVEL OF LINOLEIC ACID INTAKE AND THAT IN ADIPOSE TISSUE OF BROILERS CHICKENS

  6. omega-6 family omega-3 family C18:2n-6 (LA) C18:3n-3 (ALA) D-6 desaturase C18:3n-6 (GLA) C18:4n-3 Elongase C20:3n-6 (DGLA) C20:4n-3 D-5 desaturase C20:4n-6 (AA) C20:5n-3 (EPA) Elongase C22:4n-6 C22:5n-3 D-4 desaturase C22:6n-3 (DHA)

  7. ALPHA-LINOLENIC ACID LEVELS IN TISSUES OF GOAT KIDS FED A MILK REPLACER DEFICIENT IN ALPHA-LINOLENIC ACID

  8. INFLUENCE OF DIETARY OMEGA-6:OMEGA-3 RATIO ON LPS-INDUCED LEUKOTRIENE B CONCENTRATIONS IN DOG SKIN (Vaughn et al., 1994)

  9. CANINE ATOPIC DERMATITIS • Hereditary IgE-mediated hyper-sensitivity to environmental allergens • Incidence: up to 15% of population • Primary clinical sign: pruritus

  10. Score for severity of pruritus and erythema at week 10 Pruritus, Intensity Pruritus, Frequency Pruritus, Total Erythema

  11. DIETARY MANAGEMENT AND SURVIVAL TIME IN CATS WITH CHRONIC RENAL FAILURE

  12. SURVIVAL TIMES AND DIETARY EPA LEVELS IN CATS WITH CHRONIC RENAL FAILURE

  13. EFFECT OF CLA FEEDING ON BODY FAT, ENERGY EXPENDITURE AND FAECAL FAT EXCRETION IN MICE

  14. EFFECT OF FAT FEEDING ON APPARENT FIBRE DIGESTIBILITY IN HORSES

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