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intramuscular fat

Isabelle Dm Gangnat, Pierre-Alain Dufey, Paolo Silacci, Jessika Messadene-Chelali, Michael Kreuzer, Joel Berard
BACKGROUND: Compared to weaned calves, nursed calves benefit from access to milk as nutrient-dense feed and mentoring by their dams. Both may be decisive for growth under difficult conditions such as grazing on alpine pastures, where experience will play an essential role. These factors were investigated separately by comparing nursed calves with calves weaned at 3 months of age and grazing with or without mentor cow (n = 8 calves). RESULTS: Weaned calves with mentor cows spent less time lying and walked more than nursed calves...
October 17, 2016: Journal of the Science of Food and Agriculture
P A Lopes, A P Martins, S V Martins, M S Madeira, N C Santos, T F Moura, J A M Prates, G Soveral
The production of pork with moderate amounts of intramuscular fat (IMF) without an increase in subcutaneous fat is highly desirable for the meat industry. Several studies indicate that dietary protein reduction during the growing-finishing period of pigs enhances IMF content, but its consequence on carcass fat deposition is still contradictory. In this study, we hypothesized that the effects of reduced protein diets (RPD), corrected or not with the limiting amino acid lysine, on subcutaneous fat deposition from pigs with distinct genotypes are mediated by adipose membranes biophysical properties...
October 17, 2016: Animal: An International Journal of Animal Bioscience
X Cui, R Liu, H Cui, G Zhao, M Zheng, Q Li, J Liu, Z Liu, J Wen
Capons and ovariectomized chickens are birds that have been gonadectomized to improve the meat quality. This study investigated the effects of caponization and ovariectomy on physical, chemical, and fatty acid and amino acid profiles of meat from Beijing-You chickens (a Chinese local breed) at market age (17 wk). All birds (20 capons, 20 ovariectomized, and 40 controls) were reared under the same conditions. Breast muscle fiber diameter and area were significantly smaller and the fiber density was higher in capons and ovariectomized chickens than in controls (P < 0...
October 12, 2016: Poultry Science
Daniel G Whitney, Harshvardhan Singh, Freeman Miller, Mary F Barbe, Jill M Slade, Ryan T Pohlig, Christopher M Modlesky
INTRODUCTION: Nonambulatory children with severe cerebral palsy (CP) have underdeveloped bone architecture, low bone strength and a high degree of fat infiltration in the lower extremity musculature. The present study aims to determine if such a profile exists in ambulatory children with mild CP and if excess fat infiltration extends into the bone marrow. MATERIALS AND METHODS: Ambulatory children with mild spastic CP and typically developing children (4 to 11years; 12/group) were tested...
October 9, 2016: Bone
Mark Ng Tang Fui, Luke A Prendergast, Philippe Dupuis, Manjri Raval, Boyd J Strauss, Jeffrey D Zajac, Mathis Grossmann
BACKGROUND: Whether testosterone treatment has benefits on body composition over and above caloric restriction in men is unknown. We hypothesised that testosterone treatment augments diet-induced loss of fat mass and prevents loss of muscle mass. METHODS: We conducted a randomised double-blind, parallel, placebo controlled trial at a tertiary referral centre. A total of 100 obese men (body mass index ≥ 30 kg/m(2)) with a total testosterone level of or below 12 nmol/L and a median age of 53 years (interquartile range 47-60) receiving 10 weeks of a very low energy diet (VLED) followed by 46 weeks of weight maintenance were randomly assigned at baseline to 56 weeks of 10-weekly intramuscular testosterone undecanoate (n = 49, cases) or matching placebo (n = 51, controls)...
October 7, 2016: BMC Medicine
Yong Wang, Hongwei Chen, Diangang Han, Ying Chen, Gemingguli Muhatai, Tursunjan Kurban, Jinming Xing, Jianzhong He
The adipocyte-type fatty acid-binding protein (A-FABP) is considered a candidate gene for fat metabolism; thus, it affects fat deposition in chickens. The present study was designed to examine the polymorphism and mRNA abundance of the A-FABP gene with intramuscular fat (IMF) in the pectoralis muscles (PM) and leg muscles (LM) of Three-yellow Chicken (TYC) and Hetian-black Chicken (HTBC). In total, 60 TYCs and 60 HTBCs were sacrificed using exsanguination at market age. The IMF contents of the PM and LM in the HTBC were significantly higher than those in the TYC...
August 10, 2016: Animal Biotechnology
P Supakankul, S Mekchay
Ubiquitin protein ligase E3C (UBE3C) is involved in the ubiquitin-proteasome pathway, and several ubiquitin protein ligases are important for fat deposition and lipid metabolism. The objective of this study was to analyze the association between a single nucleotide polymorphism (SNP) of the UBE3C gene with intramuscular fat (IMF) content and fatty acid (FA) composition in Duroc pigs. Four SNP markers (g.1586399A>G, g.1591358G>A, g.1600132G>C, and g.1600166G>A) of porcine UBE3C were genotyped using the polymerase chain reaction-restriction fragment length polymorphism method, and their associations with IMF content and FA composition were investigated in a commercial Duroc pig population...
August 29, 2016: Genetics and Molecular Research: GMR
N R Lambe, K A McLean, J Gordon, D Evans, N Clelland, L Bunger
Novel, multi-object X-ray computed tomography (CT) methodologies can individually analyse vacuum-packed meat samples scanned in batches of three or more, saving money and time compared to scanning live animals. If intramuscular fat (IMF), as a proxy for meat quality, can be predicted with similar accuracies as in live lambs, this method could be used to grade on quality, or to inform breeding programmes. Lamb loin cuts from commercial carcasses (n=303), varying in fat and conformation grade, were vacuum-packed and CT scanned, then tested for meat quality traits and by a trained taste panel...
September 21, 2016: Meat Science
G B Mezgebo, A P Moloney, E G O'Riordan, M McGee, R I Richardson, F J Monahan
Bull beef production is traditionally based on high concentrate rations fed indoors. Inclusion of grazed grass, which is generally a cheaper feed, would decrease the cost of bull beef production, but may affect beef quality. Accordingly, the organoleptic quality and composition of beef from continental-sired suckler bulls (n=126) assigned to either ad libitum concentrates to slaughter (C), grass silage (GS) ad libitum for 120 days followed by C (GSC) or GS followed by 100 days at pasture and then C (GSPC) and slaughtered at target carcass weights (CW) of 360, 410 or 460 kg was examined...
October 3, 2016: Animal: An International Journal of Animal Bioscience
Dorien Goubert, Jessica Van Oosterwijck, Mira Meeus, Lieven Danneels
BACKGROUND: Lumbar muscle dysfunction due to pain might be related to altered lumbar muscle structure. Macroscopically, muscle degeneration in low back pain (LBP) is characterized by a decrease in cross-sectional area and an increase in fat infiltration in the lumbar paraspinal muscles. In addition microscopic changes, such as changes in fiber distribution, might occur. Inconsistencies in results from different studies make it difficult to draw firm conclusions on which structural changes are present in the different types of non-specific LBP...
September 2016: Pain Physician
Anna Puig-Oliveras, Manuel Revilla, Anna Castelló, Ana I Fernández, Josep M Folch, Maria Ballester
The aim of this work is to better understand the genetic mechanisms determining two complex traits affecting porcine meat quality: intramuscular fat (IMF) content and its fatty acid (FA) composition. With this purpose, expression Genome-Wide Association Study (eGWAS) of 45 lipid-related genes associated with meat quality traits in swine muscle (Longissimus dorsi) of 114 Iberian × Landrace backcross animals was performed. The eGWAS identified 241 SNPs associated with 11 genes: ACSM5, CROT, FABP3, FOS, HIF1AN, IGF2, MGLL, NCOA1, PIK3R1, PLA2G12A and PPARA...
2016: Scientific Reports
Giuseppe Maiorano, Katarzyna Stadnicka, Siria Tavaniello, Cinzia Abiuso, Joanna Bogucka, Marek Bednarczyk
The purpose of this study was to examine the effect of in ovo injection of 2 different prebiotics, DiNovo (DN; Laminaria spp., extract containing laminarin and fucoidan) and Bi(2)tos (BI; non-digestive trans-galactooligosaccharides from milk lactose digested with Bifidobacterium bifidum NCIMB 41171), on growth, slaughter traits, intramuscular fat percentage (IF) and muscle fiber diameter, and lipid oxidation of meat in chickens reared under commercial conditions, following an in ovo trial protocol. On d 12 of embryonic incubation, 350,560 Ross 308 eggs were randomly divided into 3 experimental groups and automatically injected in ovo with: physiological saline (control group), BI at dose of 3...
September 23, 2016: Poultry Science
Jingxiang Cui, Wei Chen, Jie Liu, Tao Xu, Yongqing Zeng
BACKGROUND: Intramuscular fat (intramuscular fat, IMF) is one of the important traits of pork quality. How to reasonably improve the intramuscular fat content is the most focus researchers. Some possible regulation of intramuscular fat deposition of candidate genes to cause the attention of people. The objective of this study was to elucidate the relationship between peroxisome proliferator-activated receptor γ (PPARγ) and adipose differentiation-related protein (ADRP) mRNA expression and intramuscular fat (IMF) deposition in the muscle tissue of three breeds of pig: Laiwu (LW), Lulai Black (LL), and Large White (LY)...
2016: SpringerPlus
Aaron Ross Flakemore, Bunmi Sherifat Malau-Aduli, Peter David Nichols, Aduli Enoch Othniel Malau-Aduli
This study evaluated omega-3 intramuscular fatty acids in the longissimus thoracis et lumborum of commercially prepared Australian lamb loin chops. Meats, denuded of external fats were cooked by means of conductive dry-heat using a fry grilling hot plate, to a core temperature of 70°C. An untrained consumer panel assessed meat appearance, aroma, tenderness, juiciness, taste and overall liking. Results showed no compositional alterations (P>0.05) to omega-3 fatty acids due to cooking treatment, whereas on absolute terms (mg/100g muscle) omega-3 fatty acids significantly (P<0...
September 13, 2016: Meat Science
Xiaoling Chen, Yanliu Luo, Ruisheng Wang, Bo Zhou, Zhiqing Huang, Gang Jia, Hua Zhao, Guangmang Liu
Fatty acid transport protein 1 (FATP1) plays an important role in the fatty acid transmembrane transport and fat deposition. However, its role in porcine intramuscular preadipocytes proliferation and differentiation remain poorly understood. Here, we examined the effects of pFATP1 on porcine intramuscular preadipocytes proliferation and differentiation. Overexpression of pFATP1 in porcine intramuscular preadipocytes significantly promoted the proliferation of porcine intramuscular preadipocytes, and also significantly upregulated the expressions of peroxisome proliferator-activated receptor γ, CCAAT enhancer binding protein α, lipoprotein lipase, fatty acid synthetase and perilipin 1...
September 12, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
Susumu Muroya, Masahiro Shibata, Masayuki Hayashi, Mika Oe, Koichi Ojima
We aimed to understand the roles of miRNAs in the muscle tissue maturation and those of circulating microRNAs (c-miRNAs) in beef production of Japanese Black (JB) cattle (Wagyu), a breed with genetically background of superior intermuscular fat depot, by comparing different feeding conditions (indoor grain-feeding vs. grazing on pasture). The cattle at 18 months old were assigned to pasture feeding or conventional indoor grain feeding conditions for 5 months. Microarray analysis of c-miRNAs from the plasma extracellular vesicles led to the detection of a total of 202 bovine miRNAs in the plasma, including 15 miRNAs that differed between the feeding conditions...
2016: PloS One
Supamit Mekchay, Pantaporn Supakankul, Tanavadee Kumchoo
Intramuscular fat (IMF) content has a positive impact on meat quality in pigs. Fatty acid (FA) composition is an important factor and serves as an indicator for lipid quality due to its implications for human health. The aims of this study were to identify and evaluate the effective SNP markers for fat deposition in the longissimus dorsi muscles of pigs using the AFLP approach. Sixty-four selective primer combinations were used to identify the AFLP markers in the 20 highest- and 20 lowest-IMF content phenotypes...
September 9, 2016: Asian-Australasian Journal of Animal Sciences
M A Smith, R D Bush, R J van de Ven, E J S Hall, P L Greenwood, D L Hopkins
Meat quality parameters for 50 huacaya alpacas, representing three age groups (18, 24 and 36months) and two genders (females and castrated males) were studied. Prior to chilling, samples of m. longissimus thoracis et lumborum (LL) were taken to determine isocitrate dehydrogenase activity and glycogen concentration, and further meat quality samples were taken after 24h. Alpaca meat has low levels (<1%) of intramuscular fat in the LL, m. semimembranosus and m. biceps femoris, but the level in the LL increases with animal age, with levels of desirable polyunsaturated fatty acids (PUFA) ranging from 96...
August 29, 2016: Meat Science
J Megan Sions, Peter C Coyle, Teonette O Velasco, James M Elliott, Gregory E Hicks
OBJECTIVE: The purpose of this study was to determine if multifidi size and/or intramuscular fat were associated with self-reported and performance-based physical function in older adults with and without chronic LBP. DESIGN: Case-control study SETTING: Individuals participated in a standardized evaluation in a clinical laboratory and underwent magnetic resonance imaging (MRI) of the lumbar spine at a nearby facility. PATIENT SAMPLE: A volunteer sample of 106 community-dwelling older adults, aged 60-85 years, with (n=57) and without (n=49) chronic LBP were included in this secondary data analysis...
August 30, 2016: Archives of Physical Medicine and Rehabilitation
Takehiko Shimoyama, Bunpei Kimura
This case report describes a 73-year-old male with an hourglass-type transmural lipoma who was referred because of an abnormal chest shadow. Computed tomography showed a well-defined fatty mass within the intra-and extra-thorax at the right 3rd intercostal portion. Magnetic resonance imaging showed a high-intensity mass that had the same signal level as fat tissue. Therefore, the tumor was diagnosed as an hourglass transmural lipoma. Tumor resection was performed with video-assisted thoracic surgery, and 3rd intercostal muscle tissue approximately 1cm from the tumor border was also resected...
September 2016: Kyobu Geka. the Japanese Journal of Thoracic Surgery
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