PMID- 17431050
OWN - NLM
STAT- MEDLINE
DCOM- 20070924
LR  - 20081121
IS  - 1525-3163 (Electronic)
IS  - 0021-8812 (Linking)
VI  - 85
IP  - 9
DP  - 2007 Sep
TI  - Influence of ruminal and postruminal carbohydrate infusion on visceral organ mass 
      and adipose tissue accretion in growing beef steers.
PG  - 2256-70
AB  - Forty crossbred beef steers (243 +/- 2 kg of BW) with ruminal and abomasal 
      infusion catheters were used to test 2 hypotheses: 1) visceral mass is responsive 
      to energy input and site of carbohydrate (CHO) infusion and 2) rate and site of 
      adipose accretion are dependent on site of CHO infusion and complexity. 
      Treatments included a pelleted, forage-based, basal diet fed at 161 (LI) or 214 
      (HI) kcal of ME/(kg of BW(0.75) x d), LI plus ruminal (R-SH) or abomasal (A-SH) 
      infusion of a partial starch hydrolysate (SH), and LI plus abomasal infusion of 
      glucose (A-G). The basal diet was fed in 12 equal portions daily at 2-h 
      intervals, with starch and glucose infused over a 22-h period at rates of 12.6 
      and 14.4 g/(kg of BW(0.75) x d). After 35 d of infusion, steers were slaughtered; 
      and visceral organ and adipose mass, subcutaneous adipose thickness over the 5th 
      and 12th rib, and LM intramuscular fat concentration were determined. Total 
      intake energy (IE) increased (P = 0.0001) with ME intake. Dietary IE was similar 
      between LI and CHO treatments, but total IE increased (P < 0.001) with CHO 
      infusion. Greater dietary ME intake and CHO infusion increased or tended (P < or 
      = 0.09) to increase final BW and HCW. As a percentage of empty BW, total stomach 
      complex, rumen, omasum, liver, pancreas, and kidney weights were greater (P < or 
      = 0.05) for HI vs. LI. Stomach complex, rumen, pancreas, and kidney weights as a 
      percentage of empty BW were greater (P < or = 0.05) for R-SH vs. A-SH. Compared 
      with ASH, A-G increased (P < or = 0.02) total and mucosal weights from the 10-cm 
      sections of the ileum. Increases in rumen mass were associated with no change or 
      an increase in rumen total and mucosal DNA concentrations. Greater dietary ME 
      tended (P = 0.06) to increase subcutaneous fat thickness at the 5th rib but did 
      not affect alimentary adipose accretion on an empty BW basis. Omental and total 
      alimentary adipose weights were increased (P < or = 0.04) by A-G compared with 
      A-SH. Although SH infusion did not alter adiposity, there was a consistent 
      numerical pattern in total alimentary and subcutaneous fat depots with CHO 
      infusion (A-G > ASH > R-SH). Our findings demonstrate that increasing ruminal CHO 
      supply results in a disproportionate increase in rumen mass, whereas increasing 
      small intestinal CHO supply does not alter gastrointestinal organ mass. Small 
      intestinal energy in the form of glucose resulted in greater adipose accretion, 
      particularly the omental depot.
FAU - McLeod, K R
AU  - McLeod KR
AD  - Department of Animal and Food Sciences, University of Kentucky, Lexington, KY 
      40546, USA. kmcleod@uky.edu
FAU - Baldwin, R L 6th
AU  - Baldwin RL 6th
FAU - Solomon, M B
AU  - Solomon MB
FAU - Baumann, R G
AU  - Baumann RG
LA  - eng
PT  - Journal Article
DEP - 20070412
PL  - United States
TA  - J Anim Sci
JT  - Journal of animal science
JID - 8003002
RN  - 0 (Carbohydrates)
SB  - IM
MH  - Abomasum/*metabolism
MH  - Adipose Tissue/anatomy & histology/drug effects/*metabolism
MH  - Animal Feed
MH  - Animal Nutritional Physiological Phenomena
MH  - Animals
MH  - Carbohydrates/*administration & dosage
MH  - Cattle/*growth & development
MH  - Digestion
MH  - Energy Intake
MH  - Energy Metabolism
MH  - Infusions, Parenteral/veterinary
MH  - Male
MH  - Organ Size/drug effects
MH  - Rumen/*metabolism
MH  - Viscera/*growth & development
MH  - Weight Gain
EDAT- 2007/04/14 09:00
MHDA- 2007/09/25 09:00
CRDT- 2007/04/14 09:00
PHST- 2007/04/14 09:00 [pubmed]
PHST- 2007/09/25 09:00 [medline]
PHST- 2007/04/14 09:00 [entrez]
AID - jas.2006-359 [pii]
AID - 10.2527/jas.2006-359 [doi]
PST - ppublish
SO  - J Anim Sci. 2007 Sep;85(9):2256-70. doi: 10.2527/jas.2006-359. Epub 2007 Apr 12.