The effect of breed on fatty acid composition of subcutaneous adipose tissues in fat-tailed sheep under identical feeding conditions

Maleki, E.; Kafilzadeh, F.; Meng, Goh Yong; Rajion, Mohamed Ali; Ebrahimi, Mahdi

doi:10.4314/sajas.v45i1.2

Cited by 11 publications

(3 citation statements)

References 28 publications

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“…It was dominated by MUFA, followed by SFA and PUFA. This is consistent with other studies (Maleki, Kafilzadeh, Meng, Rajion, & Ebrahimi, ; Lestingi, Facciolongo, Marzo, Nicastro, & Toteda, ). The primary UFA in LD and BF muscles was cis‐9‐octadecanoic acid (C18:1n‐9c) and linoleic acid (18:2n‐6c).…”

Section: Discussionsupporting

confidence: 93%

Effects of dietary energy level on growth performance, blood parameters and meat quality in fattening male Hu lambs

Wang

Hussain

et al. 2020

Animal Physiology Nutrition

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This experiment was conducted to investigate the effects of different dietary energy levels on growth performance, slaughter traits, meat quality and blood biochemical parameters in fattening male Hu lambs. Sixty lambs were fed five iso‐protein diets which contained different levels of metabolizable energy in a completely randomized design for 70 days. At the end of study, fifteen lambs were harvested for further study. With the increase in dietary energy level, the daily weight gain and dry matter intake extremely increased (p < .001), and feed conversion ratio decreased significantly (p < .01). The live weight before slaughter (LWBS) and carcass weight had a significant increase (p < .05), non‐carcass fat ratio and routine indexes of meat quality had no significant difference. Almost no effect was observed for the amino acid profile except for glycine concentration decreased (p < .05) in longissimus dorsi (LD) muscle. The concentrations of C17:0, C18:3n‐3 and n‐3 PUFA (p < .01) significantly decreased with the increasing dietary energy levels, and the ratio of ∑n‐6/∑n‐3 (p < .01) increased, whereas the concentrations of C18:1n‐9t (p < .05) decreased in LD muscle and C18:1 (p < .01) increased in biceps femoris (BF) muscle. There were no obviously differences for diameter, area and density of muscle fibres. The relative expression of MyHC‐IIa and MyHC‐IIx decreased significantly (p < .05) in BF muscle, and the relative expression of MyHC‐IIa displayed an obviously decreasing trend (p < .10) in LD muscle. These results suggest that increasing the dietary energy level can improve the growth performance and slaughter traits, and influence meat quality and fatty acid profiles in different muscle tissues of fattening male Hu lambs. These results provide a theoretical basis for developing Hu sheep nutritional standards and designing feed formulations.

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Section: Discussionsupporting

confidence: 93%

Effects of dietary energy level on growth performance, blood parameters and meat quality in fattening male Hu lambs

Wang

Hussain

et al. 2020

Animal Physiology Nutrition

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“…On the other hand, in the present study we reported significant differences between breeds related to the sum PUFA in SCF ( p < 0.03) and the sum n -6 PUFA in TF ( p < 0.01). However, Maleki et al [41] reported significant differences with respect to the sum PUFA and n -6 PUFA proportions in SCF but not in TF ( p > 0.05) between breeds. Thus, the higher sum MUFA ( p < 0.01) and sum PUFA ( p < 0.03) found in SCF of Chilota vs. Suffolk Down lambs were not the result of a higher protein expression of SCD1 in this tissue [5,42].…”

Section: Discussionmentioning

confidence: 99%

Effect of Breed on Transcriptional and Protein Expression of Lipogenic Enzymes in Tail and Subcutaneous Adipose Tissue from Two Grazing Breeds of Lambs

Gallardo

Arias-Darraz

Cárcamo

2019

Animals

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This experiment was carried out to determine the effect of breed on mRNA and protein expression levels of lipogenic enzymes acetyl-CoA carboxylase α (ACC), fatty acid synthase (FAS), stearoyl-CoA desaturase 1 (SCD1) plus sterol regulatory element binding transcription factor 1c (SREBP1c) in the subcutaneous fat (SCF) from the back of the animal, and tail fat (TF) of both Chilota and Suffolk Down lambs grazing Calafatal. Eight Chilota and six Suffolk Down 2-month-old male lambs were allocated to graze a “Calafatal”, a typical secondary succession of Chiloé Archipelago, Chile. After 62 d, lambs were slaughtered according to Chile’s meat industry standards. Fatty acid profile, RT-qPCR, and Western blot analyses from SCF and TF samples were performed. Although the mRNA expression levels of ACC, FAS, SCD1 and SREBP1c in SCF did not differ significantly between breeds (p > 0.05), a trend to higher mRNA expression of FAS and SREBP1c in TF from Chilota lambs was observed (p = 0.06). On the other hand, FAS levels in SCF were higher in Chilota than in Suffolk Down lambs (p < 0.02), although Suffolk Down showed higher fat contents and saturated fatty acid (SFA) proportions than Chilota lambs (p < 0.01). The FAS protein expression in TF was similar in both breeds (p > 0.05). Although the fat content was higher in Suffolk Down than in Chilota lambs (p < 0.01), the SFA proportions were similar in both breeds. Finally, it can be concluded that although mRNA expression of enzymes was similar in both breeds, there were differences in some protein levels in the SCF, partially related with the fatty acid profiles, thus affecting the selection of lamb breed either for human consumption or experimental purposes.

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“…This relation has recently been explained by the ability of CLA to enhance insulin sensitivity (Cho et al, 2016). Therefore, it was observed that increased CLA has a strong association with anticancer (Peng et al, 2010), anti-adipogenic (Maleki et al, 2015), anti-atherosclerotic properties (De Hartigh, 2019), and cardioprotective effects (Parodi, 2009).…”

Section: Impacts Of Polyunsaturated Fatty Acids and Conjugated Linolementioning

confidence: 99%

The Effects of Grass-Based versus Grain-Based Feeding of Ruminants on the Human Hygienic Status, a Review.

Al‐Shuhaib¹,

Al-Shuhaib²

2019

jwpr

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Ruminant meat quality is one of the important factors contributing to the recent spreading of several diseases, such as obesity, cancer, and cardiovascular problems, which have increased predominately. Feeding regiment plays an important role in the determination of the composition of fatty acids and meat quality in ruminants. This review aims to highlight the main factors that lie behind the variability of ruminant meat quality and its effect on human being's health. The reduction in grass-feeding decreases saliva levels in the ruminants, which has several consequences on the rumen, including a reduction in pH level, along with a reduction in the microorganism activities and conjugated linoleic acid levels. In adipose tissues, the expression of the stearoyl-CoA desaturases gene is negatively affected by the decreased conjugated linoleic acid levels in the rumen, which leads to a decreased transformation of saturated fatty acids to monounsaturated fatty acids. Therefore, the lower monounsaturated fatty acids and the parallel increase in the proportion of saturated fatty acids in the consumed meat can be associated with some human diseases. Thus, the present study provided a molecular explanation for the superiority of grass-based feeding in ruminants raised at pasture in term of production of meat with a healthier quality for consumers than those raised on grains.

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The effect of breed on fatty acid composition of subcutaneous adipose tissues in fat-tailed sheep under identical feeding conditions

Cited by 11 publications

References 28 publications

Effects of dietary energy level on growth performance, blood parameters and meat quality in fattening male Hu lambs

Effects of dietary energy level on growth performance, blood parameters and meat quality in fattening male Hu lambs

Effect of Breed on Transcriptional and Protein Expression of Lipogenic Enzymes in Tail and Subcutaneous Adipose Tissue from Two Grazing Breeds of Lambs

The Effects of Grass-Based versus Grain-Based Feeding of Ruminants on the Human Hygienic Status, a Review.

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