Metabolism and glucose kinetics in sheep fed plantain and orchard grass and exposed to cold

Sano, Hiroaki; Tamura, Yasuaki; Shiga, Akio

doi:10.1080/00288233.2002.9513507

Cited by 7 publications

(12 citation statements)

References 20 publications

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“…Weight change differed little between the diets, and BW tended to be reduced (P = 0.06) during cold exposure. Similar results were observed in sheep fed fresh PL and OR diets (Sano et al 2002). The tendency toward reduced BW during cold exposure may mainly be due to reduced digestibilities and water intake and enhanced energy expenditure (Kennedy et al 1976;Kennedy & Milligan 1978;Tsuda et al 1984) because feed intake was the same in both environments.…”

Section: Resultssupporting

confidence: 80%

“…Of the chemical compositions and macrominerals in the diets, neutral detergent fibre and ether extract were lower for the PL diet, whereas Ca content was considerably greater for the PL diet than for the OR diet (Table 1) as observed previously (Sano et al 2002). Six sheep consumed all the diets which were fed, but the other two sheep could not eat all the OR diet ( Table 2).…”

Section: Resultssupporting

confidence: 73%

“…Cold exposure is one of the stresses which reduce productivity, and influence digestive and metabolic responses, intermediary metabolism, and the actions of hormones in ruminants (Weekes et al 1983;Tsuda et al 1984;Young et al 1989;Sano et al 1995). We found that in sheep fed the PL diet and the orchardgrass (OR, Dactylis glomerata L.) diet, net blood glucose turnover rate was similar between the diets in both thermoneutral and cold environments (Sano et al 2002). However, data on the relationship between the PL diet and insulin action in ruminants exposed to cold has not been reported.…”

Section: Introductionmentioning

confidence: 78%

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Tissue responsiveness and sensitivity to insulin in sheep fed plantain and orchardgrass and exposed to cold

Sano

Tamura

Shiga

2003

New Zealand Journal of Agricultural Research

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To assess the effect on insulin action of feeding a forage herb to sheep exposed to a cold environment, eight sheep were fed either plantain (PL), a forage herb, or orchardgrass (OR), a forage. A hyperinsulinaemic euglycaemic clamp procedure was applied to determine tissue responsiveness and sensitivity to insulin in both the thermoneutral (20°C) and cold (0-4°C) environments. For the glucose clamp procedure, insulin was infused over four sequential 2-h periods at rates of 0.64, 1.6, 4.0, and 10 mU kg -0.75 body weight min -1 and glucose was infused at variable rates to maintain euglycaemia. The maximal glucose infusion rate (tissue responsiveness to insulin) was greater (P = 0.04) for the PL diet than for the OR diet, and was enhanced (P = 0.001) during cold exposure. The plasma insulin concentration at half maximal glucose infusion rate (tissue sensitivity to insulin) was influenced by neither diet nor environment. No significant diet by environment interaction was observed for these variables. It is possible that in sheep the forage herb PL enhances insulin action through enhanced tissue responsiveness. Insulin action in response to cold exposure was comparable between the PL and OR diets.

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Section: Resultssupporting

confidence: 80%

Section: Resultssupporting

confidence: 73%

Section: Introductionmentioning

confidence: 78%

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Tissue responsiveness and sensitivity to insulin in sheep fed plantain and orchardgrass and exposed to cold

Sano

Tamura

Shiga

2003

New Zealand Journal of Agricultural Research

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“…In a previous study, Sano et al (2002) reported that diets containing plantain contained less gross energy than those with orchardgrass. Furthermore, the plasma concentration of NEFA is linearly and negatively correlated with feed intake of ewes (Landau et al, 1992).…”

Section: Discussionmentioning

confidence: 94%

“…It was found that roughage generated a higher heat increment than concentrate (Sudarman and Ito, 2000). Sano et al (2002) stated that plantain showed a more concentrate-like fermentation pattern than orchardgrass hay, which might be partially responsible for this higher rectal temperature. It is well known that, like the present experimental findings, HE increases rectal temperature in sheep.…”

Section: Discussionmentioning

confidence: 99%

Responses of plasma glucose metabolism to exogenous insulin infusion in sheep-fed forage herb plantain and exposed to heat

Al-Mamun

Shibuya

Kajita

et al. 2017

Animal

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The use of herbal plants as traditional medicines has a century long history. Plantain (Plantago lanceolata L.) is a perennial herb containing bioactive components with free radical scavenging activities. An isotope dilution technique using [U-13 C]glucose was conducted to determine the effect of plantain on the responses of plasma glucose metabolism to exogenous insulin infusion in sheep. Six crossbred sheep (three wethers and three ewes; mean initial BW = 40 ± 2 kg) were fed either a mixed hay of orchardgrass ( Dactylis glomerata) and reed canarygrass ( Phalaris arundinacea) (MH-diet) or mixed hay and fresh plantain (1 : 1 ratio, dry matter basis, PL-diet) and exposed to a thermoneutral (TN, 20°C; 70% relative humidity (RH)) environment or a heat exposure (HE, 30°C; 70% RH) for 5 days using a crossover design for two 23-day periods. The isotope dilution was conducted on days 18 and 23 of the experimental period during TN and HE, respectively. Plasma concentration of α-tocopherol was greater ( P < 0.0001) for the PL-diet than the MH-diet and remained comparable between environmental treatments. Plasma glucose concentration before isotope dilution technique was reduced for sheep ( P = 0.05) during HE compared with TN and remained comparable between diets. Plasma glucose turnover rate during the preinfusion period of insulin did not differ ( P = 0.10) between dietary treatments and between environments ( P = 0.65). The response of plasma glucose utilization to exogenous insulin administration was lower ( P = 0.04) for the PL-diet than the MH-diet. Under present experimental conditions, the plantain group was found to be resistant to the effects of insulin infusion.Keywords: glucose metabolism, plantain, insulin, heat stress, sheep Implications Plantain (Plantago lanceolata L.) is a perennial herb having bioactive components. The present experiment evaluated the effect of plantain on the responses of plasma glucose metabolism to exogenous insulin in heat-exposed sheep. Plasma glucose turnover rate (TR) was affected neither by feeding plantain nor exposure to a hot environment (30°C, 70% relative humidity (RH)). However, the response of plasma glucose utilization to exogenous insulin infusion was reduced in sheep when 50% of the mixed hay of orchardgrass (Dactylis glomerata) and reed canarygrass (Phalaris arundinacea) diet was replaced by fresh plantain.

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Responses of whole body protein synthesis and degradation to plantain herb in sheep exposed to heat

Al-Mamun

Hanai

Tanaka

et al. 2008

Archives of Animal Nutrition

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An experiment including a [1-(13)C]leucine isotope dilution and a nitrogen balance were carried out to determine the effect of feeding plantain herb (Plantago lanceolata L.) on whole body protein synthesis (WBPS) and degradation in sheep kept at thermoneutral temperature (20 degrees C) or exposed to heat (30 degrees C). The animals were fed either mixed hay of orchardgrass and reed canarygrass (Hay-diet) or Hay-diet and plantain (9:1) (PL-diet) at maintenance level using a crossover design. Nitrogen intake was higher (p < 0.0001) for the Hay-diet than for the PL-diet, but N balance remained similar between diets and was higher (p = 0.003) during heat exposure than at thermoneutral temperature. The WBPS was numerically lower (p = 0.10) for the PL-diet than for the Hay-diet. The direction of the response to heat exposure differed (p = 0.04) between diets: after feeding the PL-diet the WBPS increased from 15.2-16.9 g x kgW(-0.75) x d(-1), whereas it decreased after feeding the Hay-diet from 17.5-16.6 g x kgW(-0.75) x d(-1). The present results suggest that the PL-diet may have a positive impact for WBPS during heat exposure, and could be used for rearing sheep as an alternative to the Hay-diet.

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Metabolism and glucose kinetics in sheep fed plantain and orchard grass and exposed to cold

Cited by 7 publications

References 20 publications

Tissue responsiveness and sensitivity to insulin in sheep fed plantain and orchardgrass and exposed to cold

Tissue responsiveness and sensitivity to insulin in sheep fed plantain and orchardgrass and exposed to cold

Responses of plasma glucose metabolism to exogenous insulin infusion in sheep-fed forage herb plantain and exposed to heat

Responses of whole body protein synthesis and degradation to plantain herb in sheep exposed to heat

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