scholarly journals Maize Genotype and Food Matrix Affect the Provitamin A Carotenoid Bioefficacy from Staple and Carrot-Fortified Feeds in Mongolian Gerbils (Meriones unguiculatus)

2013 ◽  
Vol 62 (1) ◽  
pp. 136-143 ◽  
Author(s):  
Samantha Schmaelzle ◽  
Bryan Gannon ◽  
Serra Crawford ◽  
Sara A. Arscott ◽  
Shellen Goltz ◽  
...  
Keyword(s):  
Meriones Unguiculatus ◽  
Provitamin A ◽  
Mongolian Gerbils ◽  
Food Matrix ◽  
Maize Genotype

scholarly journals Cassava with enhanced β-carotene maintains adequate vitamin A status in Mongolian gerbils (Meriones unguiculatus) despite substantial cis-isomer content

2009 ◽  
Vol 102 (3) ◽  
pp. 342-349 ◽  
Author(s):  
Julie A. Howe ◽  
Bussie Maziya-Dixon ◽  
Sherry A. Tanumihardjo
Keyword(s):  
Vitamin A ◽  
Vitamin A Deficiency ◽  
Meriones Unguiculatus ◽  
Provitamin A ◽  
Carotenoid Content ◽  
Mongolian Gerbils ◽  
Serum Retinol ◽  
Vitamin A Status ◽  
Isomer Content ◽  
Β Carotene

Efforts to increase β-carotene in cassava have been successful, but the ability of high-β-carotene cassava to prevent vitamin A deficiency has not been determined. Two studies investigated the bioefficacy of provitamin A in cassava and compared the effects of carotenoid content and variety on vitamin A status in vitamin A-depleted Mongolian gerbils (Meriones unguiculatus). Gerbils were fed a vitamin A-free diet 4 weeks prior to treatment. In Expt 1, treatments (ten gerbils per group) included 45 % high-β-carotene cassava, β-carotene and vitamin A supplements (intake matched to high-β-carotene cassava group), and oil control. In Expt 2, gerbils were fed cassava feeds with 1·8 or 4·3 nmol provitamin A/g prepared with two varieties. Gerbils were killed after 4 weeks. For Expt 1, liver vitamin A was higher (P < 0·05) in the vitamin A (1·45 (sd 0·23) μmol/liver), lower in the control (0·43 (sd 0·10) μmol/liver), but did not differ from the β-carotene group (0·77 (sd 0·12) μmol/liver) when compared with the high-β-carotene cassava group (0·69 (sd 0·20) μmol/liver). The bioconversion factor was 3·7 μg β-carotene to 1 μg retinol (2 mol:1 mol), despite 48 % cis-β-carotene [(Z)-β-carotene] composition in cassava. In Expt 2, cassava feed with 4·3 nmol provitamin A/g maintained vitamin A status. No effect of cassava variety was observed. Serum retinol concentrations did not differ. β-Carotene was detected in livers of gerbils receiving cassava and supplements, but the cis-to-trans ratio in liver differed from intake. Biofortified cassava adequately maintained vitamin A status and was as efficacious as β-carotene supplementation in the gerbil model.

scholarly journals Bioavailability of β-carotene (βC) from purple carrots is the same as typical orange carrots while high-βC carrots increase βC stores in Mongolian gerbils(Meriones unguiculatus)

2006 ◽  
Vol 96 (2) ◽  
pp. 258-267 ◽  
Author(s):  
Mandy Porter Dosti ◽  
Jordan P. Mills ◽  
Philipp W. Simon ◽  
Sherry A. Tanumihardjo
Keyword(s):  
Public Health ◽  
Vitamin A ◽  
Phenolic Acids ◽  
Health Problem ◽  
Public Health Problem ◽  
Meriones Unguiculatus ◽  
Mongolian Gerbils ◽  
Alternative Source ◽  
Β Carotene

Vitamin A (VA) deficiency is a worldwide public health problem. Biofortifying existing sources of β-carotene (βC) and increasing dietary βC could help combat the issue. Two studies were performed to investigate the relative βC bioavailability of a βC supplement to purple, high-βC orange, and typical orange carrots using Mongolian gerbils (Meriones unguiculatus). In study 1, which used a traditional bioavailability design, gerbils (n32) received a diet containing orange, purple, or white carrot powder, or white carrot powder +a βC supplement. In study 2, which included βC-biofortified carrots, gerbils (n 39) received orange, high-βC orange, purple, or white carrot powder in their diet. Both studies lasted 21 d and the gerbils were killed to determine the effect of carrot type or supplement on serum and liver βC, α-carotene, and VA concentrations. Liver stores of βC or VA in the gerbils did not differ between orange and purple carrot diets when equal amounts of βC from each of the diets were consumed (P>0·05). Both the orange and purple carrot diet resulted in higher liver VA compared with the supplement (P<0·05). High-βC carrots resulted in more than 2-fold higher βC and 1·1 times greater VA liver stores compared with typical orange carrots (P<0·05). These results suggest that high-βC carrots may be an alternative source of VA to typical carrots in areas of VA deficiency. Second, phenolics including anthocyanins and phenolic acids in purple carrot do not interfere with the bioavailability of βC from purple carrots.

The effect of sand deprivation on sandbathing and marking in Mongolian gerbils (Meriones unguiculatus)

1974 ◽  
Vol 11 (3) ◽  
pp. 403-407 ◽  
Author(s):  
Daniel F. Tortora ◽  
Jerry C. Eyer ◽  
Stephen R. Overmann
Keyword(s):  
Meriones Unguiculatus ◽  
Mongolian Gerbils

Intra- and Interspecific Observational Learning in Rats

1975 ◽  
Vol 37 (1) ◽  
pp. 241-242 ◽  
Author(s):  
Russell A. Benel
Keyword(s):  
Observational Learning ◽  
Meriones Unguiculatus ◽  
Operant Response ◽  
Albino Rats ◽  
Mongolian Gerbils

Observational learning of an operant response by male albino rats was compared under two modelling conditions. The interspecific models were Mongolian gerbils ( Meriones unguiculatus). There were no significant differences between the groups either in trials to acquisition or total responses. Possible limitations to the generalizability of these results were noted.

Vocalization control in Mongolian gerbils (Meriones unguiculatus) during locomotion behavior

2011 ◽  
Vol 130 (6) ◽  
pp. 4148-4157 ◽  
Author(s):  
Kohei Nishiyama ◽  
Kohta I. Kobayasi ◽  
Hiroshi Riquimaroux
Keyword(s):  
Meriones Unguiculatus ◽  
Mongolian Gerbils ◽  
Locomotion Behavior
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