Nutritional characterization of Mucuna pruriens : 4. Does replacing soybean meal with Mucuna pruriens in lamb diets affect ruminal, blood and tissue l-dopa concentrations?

The harmful effects of the 3,4-dihydroxy-l-phenylalanine (l-dopa) in Mucuna pruriens (Velvet bean) seeds have limited its use as a protein supplement for monogastrics and humans. Little is known about the extent of metabolism of Mucuna l-dopa in ruminants or its accumulation in ruminant tissues cons...

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Bibliographic Details
Published in:Animal feed science and technology 2009-01, Vol.148 (2-4), p.124-137
Main Authors: Chikagwa-Malunga, S.K, Adesogan, A.T, Sollenberger, L.E, Phatak, S.C, Szabo, N.J, Kim, S.C, Huisden, C.M, Littell, R.C
Format: Article
Language:English
Subjects:
Animal productions
animal tissues
antinutritional factors
Biological and medical sciences
blood chemistry
blood glucose
body weight
carcass characteristics
crude protein
dressing percentage
Feed and pet food industries
feed rations
Food industries
forage crops
forage legumes
Fundamental and applied biological sciences. Psychology
L-dopa
lamb feeding
lambs
liveweight gain
metabolic detoxification
Mucuna pruriens
protein supplements
rumen fluids
sheep breeds
skeletal muscle
soybean meal
Terrestrial animal productions
urea nitrogen
Vertebrates
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Summary:The harmful effects of the 3,4-dihydroxy-l-phenylalanine (l-dopa) in Mucuna pruriens (Velvet bean) seeds have limited its use as a protein supplement for monogastrics and humans. Little is known about the extent of metabolism of Mucuna l-dopa in ruminants or its accumulation in ruminant tissues consumed as food by humans. This study aimed to determine if replacing soybean meal (SB) with Mucuna increases concentrations of l-dopa in rumen fluid, blood and muscle tissue of lambs. Twenty-seven RM lambs (RM; initial body weight, BW=33.8±5.44kg) and 12 Florida Native (FN; initial BW=24.9±8.63kg) lambs were assigned to four treatments and fed a basal diet of coastal bermudagrass hay, corn grain, and liquid molasses for 42 (FN) or 49 days (RM) and then slaughtered. Dietary supplements were formulated by substituting 0 (SB), 330 (Lo), 670 (Med) or at least 1000 (Hi) g/kg of SB with rolled Mucuna seeds (l-dopa, 24g/kg dry matter, DM). Body weight was measured weekly and carcass characteristics and concentrations of l-dopa in rumen fluid, blood and the sterno-mandibularis muscle were measured at slaughter when concentrations of blood urea N, glucose, haptoglobin and cerruloplasmin were also measured. Lambs fed SB had higher (P
ISSN:0377-8401
1873-2216
DOI:10.1016/j.anifeedsci.2008.03.003