Ketone-body production from various substrates by sheep-rumen epithelium.
نویسندگان
چکیده
The rumen of the sheep is lined with a stratifiedsquamous epithelium, through which are absorbed short-chain fatty acids, ammonia and probably other products of the microbial degradation of foodstuffs in the rumen. The finding that this tissue can metabolize most of the short-chain fatty acids occurring in the rumen (Pennington, 1952; Annison & Pennington, 1954) and possesses a capacity for ketone-body production comparable with that of liver led us to further investigations of its metabolism. The present paper deals with some aspects of the carbohydrate metabolism of the tissue; particular attention has been given to factors governing ketone-body production.
منابع مشابه
[Relationship between acetate metabolism and TCA cycle in rumen epithelium of normal, starved and alloxan diabetic sheep].
It was reported that there was a relationship between the acetate metabolism and TCA cycle in rumen epithelium of sheep. The present study was designated to elucidate how this relationship was influenced by starvation and alloxan treatment. The results obtained are summarized as follows. There was no effect of the addition of citrate or succinate on the "C transfer from "C-acetate into CO„gluco...
متن کاملBiochemistry of sheep tissues. Enzyme systems of liver, brain and kidney.
Little information is available on the enzyme activities of sheep tissues in vitro. Kleiber (1941, 1947) measured the oxygen consumption of liver slices of rats, rabbits and sheep, and attempted to correlate the QO, of this tissue with the metabolic rate of the living animal and to establish a direct relationship to body size. However, Krebs (1950), using more refined and standardized technique...
متن کامل[Influence of propionate on metabolism of acetate and butyrate in rumen epithelium of starved and alloxan diabetic sheep].
In order to elucidate the role of propionate in themetabolism of acetate and butyrate in rumen epithelium, the effects of propionate addition on the "C transfer from "C-acetate and -butyrate into CO2, glucose, ketone bodies and lipids fractions in rumen epithelium of normally fed, starved and alloxan diabetic sheepwere investigated. The experimental results are summarized as follows.1) In rumen...
متن کامل[Relationship between propionate metabolism and TCA cycle in rumen epithelium of normal starved and alloxan diabetic sheep].
It was reported that there was a relationship between the propionate metabolism and TCA cycle, and that starvation and alloxan treatment influenced the propionate metabolism, and the relationships between the propionate metabolism and glucolysis were changed by the alloxan treatment in the rumen epithelium of sheep. Further study was designed to elucidiate the relationship betweenthe propionate...
متن کاملMetabolism of acetate, propionate and butyrate by sheep-liver slices.
Short-chain fatty acids constitute a major energy source in ruminants (Annison & Lewis, 1959). These products of ruminal fermentation are absorbed directly into portal blood and pass to the liver before reaching the general circulation. Examination of arterial and portal blood in sheep has indicated that propionate and butyrate are almost completely removed by the liver under normal feeding con...
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ورودعنوان ژورنال:
- The Biochemical journal
دوره 63 3 شماره
صفحات -
تاریخ انتشار 1956