The relation between plasma leptin concentrations and carcass lipid contents in Japanese Black steers

Kawakita, Yumi; Abé, Hiroyuki; Hodate, Koichi; Iguchi, A; Kobayashi, Mutsuhiro; Mori, Takahide; Kasai, Kikuo; Tanai, Y; Kanbe, Yoshitake; Mashiyama, H; Asada, Takashi; Miyashige, Toshikazu

doi:10.1016/s0301-6226(01)00231-7

Cited by 17 publications

(11 citation statements)

References 25 publications

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“…However, when these steers were divided into genetic groups (0% Wagyu ( n = 8), 50% Wagyu ( n = 8), 75% Wagyu ( n = 8)), there were no significant correlations between plasma leptin concentrations and the lipid content of longissimus muscle. Kawakita et al . (2001) reported that in Japanese Black steers, there were no significant relationships among plasma leptin levels, backfat thickness, BMS, and intermuscular fat contents.…”

Section: Discussionmentioning

confidence: 99%

“…However, dose–response parallelism of sheep plasma (Tokuda et al . 2000) and bovine plasma (Kawakita et al . 2001) with the human leptin standard was found using the Multi‐Species RIA kit.…”

Section: Discussionmentioning

confidence: 99%

“…2001) with the human leptin standard was found using the Multi‐Species RIA kit. Kawakita et al . (2001) also reported that standard curves of recombinant bovine leptin and human leptin were almost the same using this kit.…”

Section: Discussionmentioning

confidence: 99%

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The relationship between plasma leptin concentrations and the distribution of body fat in crossbred steers

Yamada

Kawakami

Nakanishi

2003

Animal Science Journal

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The objective of the present study was to examine the relationship between plasma leptin levels and fat distribution in crossbred steers. Twenty‐four crossbred steers (Japanese Black × Holstein) were used in this study. Six steers belonged to the growing phase (11 months of age), and 18 steers to the finishing phase (from 21 to 28 months of age). Plasma leptin levels correlated positively with body fat weight (r = 0.807, P < 0.01), body fat percentage (r = 0.802, P < 0.01), visceral fat weight (r = 0.807, P < 0.01), visceral fat percentage (r = 0.780, P < 0.01), subcutaneous fat weight (r = 0.745, P < 0.01), subcutaneous fat percentage (r = 0.734, P < 0.01), intermuscular fat weight (r = 0.793, P < 0.01), intermuscular fat percentage (0.775, P < 0.01), renal fat weight (r = 0.694, P < 0.01), renal fat percentage (r = 0.642, P < 0.01), subcutaneous fat thickness (r = 0.755, P < 0.01), intermuscular fat thickness (r = 0.721, P < 0.01), beef marbling score (r = 0.706, P < 0.01) and the crude fat content of Musculus longissimus thoracis (r = 0.592, P < 0.01). The location of fat deposits did not affect the correlation values. However, when steers were divided into growing (n = 6) and finishing (n = 18) groups, there was no significant correlation between plasma leptin levels and the carcass characteristics related to fat deposition (fat weight, fat percentage, carcass traits) in either group. These results suggest that plasma leptin levels in crossbred steers positively correlate with body fat content and carcass traits when these parameters vary widely.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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The relationship between plasma leptin concentrations and the distribution of body fat in crossbred steers

Yamada

Kawakami

Nakanishi

2003

Animal Science Journal

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“…ribeye area) in steers. Kawakita et al (2001) probed links to carcase fat in high eating-quality Japanese Black cattle: leptin increased with age and steers on a higher protein diet had more backfat. Leptin levels in these steers were expected to be higher at slaughter but only weakly correlated with fatness.…”

Section: The Biological Significance Of Leptin In Animalsmentioning

confidence: 99%

Leptin in farm animals: where are we and where can we go?

Wylie

2011

Animal

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Fat affects meat quality, value and production efficiency as well as providing energy reserves for pregnancy and lactation in farm livestock. Leptin, the adipocyte product of the obese (ob) gene, was quickly seen as a predictor of body fat content in animals approaching slaughter and an aid to assessing reproductive readiness in females. Its participation in inflammation and immune responses that help animals survive infection and trauma has clear additional relevance to meat and milk production. Furthermore, almost a decade of discoveries of nucleotide polymorphisms in the leptin and leptin receptor genes has suggested useful applications relating to feed intake regulation, the efficiency of feed use, the composition of growth, the timing of puberty, mammogenesis and mammary gland function and fertility in cattle, pigs and poultry. The current review attempts to summarise where research has taken us in each of these aspects and speculates on where future research might lead.Keywords: leptin, farm animals, production efficiency, fat, body composition ImplicationsLeptin has not yet delivered the initial expectations of animal scientists eager for a robust and reliable marker of body and carcase fat in farm livestock, but its close association with fat and fat deposition continue to cast it as a potential aid for enhancing production efficiency, reproductive success and immune function. Polymorphisms in the leptin and leptin receptor genes provide powerful additional tools for enhanced selection to meet aspirations for increased global animal production within an overarching need to contain and reduce environmental impacts. IntroductionFat is important in all livestock production as it affects product quality and production efficiency and provides the energy reserves for pregnancy and lactation. The discovery of the obese (ob) gene and its product leptin (Zhang et al., 1994;Halaas et al., 1995) and their links to body fat (Frederich et al., 1995;Maffei et al., 1995) excited animal scientists, who quickly saw potential for leptin as a predictor of body composition in animals approaching slaughter and of reproductive readiness in females (Hossner, 1998). Its involvement in inflammation and in the immune responses that help animals survive infection and trauma, also has clear relevance and attention turned to using leptin, directly or indirectly, to influence production characteristics with feed intake, body composition, puberty, mammary gland function, immune response and the reproductive pathway all possible targets. Associations of production traits with polymorphisms in the leptin and leptin receptor genes pointed to additional applications.Among the many reviews of leptin, those by ), Baile et al. (2000, Ingvartsen and Boisclair (2001), Chilliard et al. (2005) and Barb et al. (2006) stand out as most relevant to livestock with Williams et al. (2002), Barb and Kraeling (2004), Barb et al. (2005) and Zieba et al. (2005) emphasising its involvement in reproduction. Those by Ahima and Flier (2000) and Harris (200...

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“…The crude fat content in the loin and fillet meat tended to be positively correlated with plasma leptin and insulin concentrations at the end of experiment, though the relationships between plasma leptin concentration and crude fat content in the meat was not so strong. Kawakita et al . (2001) reported that the fat content of the longissimus muscle was significantly correlated with the rate of increase in plasma leptin at 11–19 months of age in steers, though they noted that plasma leptin seemed to be weak index to predict final adiposity.…”

Section: Discussionmentioning

confidence: 99%

Plasma leptin, feed intake and body fat accumulation in fattening castrated male and female lambs

Ban‐Tokuda¹,

Delavaud²,

Chilliard³

et al. 2008

Animal Science Journal

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The main objective of this study was to investigate the relationships between changes in plasma leptin concentration and feed intake or bodyweight in female and castrated male lambs with fattening. Four female and four castrated male lambs were used and were fed roughage and concentrate supplemented with beef tallow ad libitum for 28 weeks. Although the feed intake and bodyweight increased with fattening in both the castrated male and female lambs, they decreased at 24-28 weeks in the female lambs. At the end of fattening, the crude fat content in the muscle (loin) of the female lambs was significantly higher than in the castrated male lambs (P < 0.05), while the crude protein content in the loin and fillet meat was higher in the castrated male than in the female lambs (P < 0.05). The plasma leptin concentration showed high values at a later stage of fattening (P < 0.05). In the female lambs the plasma insulin concentration increased at a later stage of fattening (P < 0.05) and was positively correlated (P < 0.0001, r = 0.78) with plasma leptin. Plasma metabolites (glucose, nonesterified fatty acid, total cholesterol and triglyceride) concentrations were also changed with fattening. Plasma total cholesterol was positively related to plasma leptin, more closely in the female than in the castrated male lambs (in females, r = 0.63, P < 0.001; in males, r = 0.38, P < 0.01). The accumulation of body fat was probably accelerated by the consumption of a lot of concentrate feed supplemented with treated beef tallow and by the stimulation of insulin with fattening. Consequently, the plasma leptin concentration increased, especially toward the end of the fattening period. The decrease in feed intake and bodyweight after the 24th week of fattening was possibly caused by an increase in leptin that is involved in the homeostatic regulation of body energy by regulating appetite.Beef tallow was supplemented at 3% of the DM of the concentrate diet. CP, crude protein; DM, dry matter; EE, ether extract; ME, metabolizable energy (calculated value); OM, organic matter. PLASMA LEPTIN IN FATTENING LAMBS 59

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The relation between plasma leptin concentrations and carcass lipid contents in Japanese Black steers

Cited by 17 publications

References 25 publications

The relationship between plasma leptin concentrations and the distribution of body fat in crossbred steers

The relationship between plasma leptin concentrations and the distribution of body fat in crossbred steers

Leptin in farm animals: where are we and where can we go?

Plasma leptin, feed intake and body fat accumulation in fattening castrated male and female lambs

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