role of nutrition and metabolism on fertility in dairy cows matt lucy f21c animal reproductive...

Role of nutrition and metabolism on fertility in dairy cows

Matt LucyF21C Animal Reproductive Biology

Division of Animal SciencesUniversity of Missouri, Columbia, USA

http://cafnr.missouri.edu/

http://www.missouri.edu/


Lactose (milk sugar)

A disaccharide composed of galactose and glucose




Lactose (milk sugar)

Two molecules of glucose are used in the production of one molecule of

lactose




Ever-Green-View My 1326-ET Waldo, Wisconsin USA February 2010

32,805 kg of milk* 1,267 kg fat974 kg protein365 d lactation

*3-times average US cow in 2010




How much glucose per day?72 g of glucose to produce 1 kg milk100 kg milk per day7.2 kg glucose per day




Glucose synthesisHealthy later lactation or dry cow

Drackley (1999) J. Dairy Sci. 82:2259-2273.




Glucose supply and demand: Prepartum and early lactation

Overton (2001) Proceedings of the Western Canadian Dairy Seminar




Glucose synthesisCow in negative energy balance

Drackley (1999) J. Dairy Sci. 82:2259-2273.




Bovine embryonic and fetal development depends on glucose

Photo courtesy of The Drost Project (University of Florida)




The Warburg EffectMetabolic Requirements for Cell Growth

Vander Heiden et al. (2009) Science 324:1029-1033




Plasma GH concentrations in postpartum dairy cows

0

5

10

15

20

-20 0 20 40 60 80 100

Days Relative to ParturitionP

lasm

a G

H (

ng

/ml)

Kobayashi et al. (1999) Endocrinology 140:3947-3954.




GH, GHR, IGF1, and insulin in Postpartum Cows

GH

IGF1

Liver

HypothalamusPituitary

GHR

Stimulatory actionInhibitory action

Nutrient PartitioningMilk Production

Insulin




Journal of General Physiology (1931)




GH/Insulin Antagonism

Insulin

GH

IGF-I

GlucoseNEFA

GHR

IR

Mammary

Liver

Pancreas

Adipose

HypothalamusPituitary

IR

GHR

Glucose

Stimulatory actionInhibitory action

Lucy 2004 (NZSAP Proceedings)




75th Annual Hoard’s Dairyman Cow Judging Contest




Glucosesupply

Glucosesupply

Insulin

GH

IGF-I

GH/Insulin antagonism during lactation




Dexcel Strain TrialHamilton, New Zealand 2001-2003

• Three strains– NA90– NZ90– NZ70

• Two different feeding levels– Low– High




Milk energy production and body condition score 2003 Strain Trial Cows

Lucy et al. (2009) J. Dairy Sci. 92:526-539.




Dexcel Strain TrialHamilton, New Zealand 2001-2003

Lucy et al. (2009) J. Dairy Sci. 92:526-539.




Theoretical model of milk production, energy balance, and body condition score

Lucy (2009) Proceedings of the 44th Annual Pacific Northwest Animal Nutrition Conference




Liver

Uterus

Ovary

GH

IGF1

Adipose

Glucose

NEFA

Insulin




Embryonic loss for heifers and cows

Santos et al. (2004)




Methods• Pregnant Holstein dairy heifers (n = 43) were

randomly assigned to one of two groups. • After calving:

– One group was dried off immediately (not milked; nonlactating).

– The other group was milked normally (twice daily; lactating).

– Slaughter at 28, 35, or 42 d of pregnancy.

Green et al. (2012) Reproduction (in press)Lucy et al. (2012) J. Dairy Sci. (submitted)




Postpartum Glucose

Trt P < 0.001Status P < 0.090Trt*Status NSDPP P < 0.070Trt*DPP NSStatus*DPP P < 0.007T*S*DPP NS

Green et al. (2012) Reproduction (in press)




Postpartum insulin

Trt P < 0.001Status NSTrt*Status NSDPP NSTrt*DPP NSStatus*DPP NST*S*DPP NS





Postpartum IGF1

Trt P < 0.001Status P < 0.019Trt*Status NSDPP P < 0.001Trt*DPP P < 0.001Status*DPP NST*S*DPP NS





Postpartum NEFA

Trt P < 0.001Status NSTrt*Status NSDPP P < 0.001Trt*DPP P < 0.001Status*DPP NST*S*DPP NS





Day 28 bovine fetuses

7 mm

Cow 15 Cow 34 Cow 39





Effect of lactation on fetal wt (g)

Lact NonlactDay 28 fetus 0.11 + 0.15 0.12 + 0.11

Day 35 fetus 0.61 + 0.11 0.80 + 0.15

Day 42 fetus 1.64 + 0.10 2.02 + 0.11

Treatment P < 0.06Day P < 0.001Status P < 0.005





Effect of lactation on placental wt (g)

Lact NonlactDay 28 placenta 1.1 + 2.2 1.2 + 1.6

Day 35 placenta 8.1 + 1.7 13.2 + 2.2

Day 42 placenta 16.8 + 1.5 25.0 + 1.6

Treatment P < 0.01Day P < 0.001





Fetal tissues and cavities

Drawing from:University of GuelphDepartment of Animal and Poultry Science




Maternal and fetal glucose

Maternal plasma Fetal fluids

Treatment P < 0.001Slaughter NST*S NS

Treatment P < 0.002Slaughter P < 0.001T*S NS

Lucy et al. (2012) J. Dairy Sci. (submitted)




Effect of status on fetal wt (g)

Pregnant to 1st AI

Pregnant to 2nd or 3rd AI

Day 28 fetus 0.14 + 0.10 0.08 + 0.13

Day 35 fetus 0.91 + 0.08 0.49 + 0.16

Day 42 fetus 2.05 + 0.10 1.61 + 0.11

Day P < 0.001Status P < 0.005





Day 35 bovine fetuses

Cow 15 Cow 34 Cow 39

Lactating;Pregnant at 2nd AI

Not lactating;Pregnant at 1st AI





Waldron study cowsPostpartum uterine weight

Lucy and Waldron (unpublished)




Day 25

Luminal Epithelium of the bovine uterus at 25 dpp

Lucy and Waldron (unpublished)




Glucose infusion0.695 g/min (1 kg/d)

Lucy (unpublished)




Glucose

Liver

Insulin

“Life on the Knife”

UterusOvary

Hypothalamus and Pituitary

Growth hormone

Immune cellsNEFA

Mammary Gland

MuscleAdipose

IGF1

AA

Glucose

Liver

Insulin


UterusOvary


Growth hormone

Immune cellsNEFA

MuscleAdipose

Inflammation

Cytokines

Inflammation

IGF1

AA

Mammary Gland

Glucose

Liver

Insulin


UterusOvary


Growth hormone

Immune cellsNEFA

MuscleAdipose

Inflammation

Cytokines

Inflammation

IGF1

AA

Mammary Gland

Unhea

lthy l

iver

Glucose

Liver

Insulin


UterusOvary


Growth hormone

Immune cellsNEFA

MuscleAdipose

Inflammation

Cytokines

Inflammation

IGF1

AA

Mammary Gland

Glucose

Liver

Insulin


UterusOvary


Growth hormone

Immune cells

MuscleAdipose

IGF1

Mammary Gland

Liver

Uterus

Ovary

GH

IGF1

Adipose

Glucose

NEFA

Insulin

Solutions:




role of nutrition and metabolism on fertility in dairy cows matt lucy f21c animal reproductive...

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