Changes in intramuscular fat, fatty acid profile and cholesterol content induced by zeranol implantation strategy in hair lambs

Valenzuela-Grijalva, Nidia Vanessa; González‐Ríos, Humberto; Islava, Thalia Y; Valenzuela, M. A.; Torrescano, Gastón; Camou, Juan Pedro; Núñez-González, Francisco A.

doi:10.1002/jsfa.4707

Cited by 7 publications

(7 citation statements)

References 28 publications

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“…Our results were consistent with those reported by Okeudo and Moss (2007) for rams and wethers of Texel breed, and for hair lambs intensively fattened in Mexico (Ramı´rez et al 2007;Valenzuela-Grijalva et al 2012).…”

Section: Resultssupporting

confidence: 93%

“…Similar to our results, Valenzuela-Grijalva et al (2012) reported a significant effect of zeranol implantation on the proportion C18:1 n-9 cis, and MUFA content; where implanted animals had a lower proportion. PUFA/SFA ratio in humans is an important risk factor for cardiovascular diseases (Kris-Etherton & Yu 1997;Simopoulos 1999), therefore, it is relevant from a human health standpoint.…”

Section: Solomonsupporting

confidence: 92%

“…Accordingly, Valenzuela-Grijalva et al (2012) in their study with hair lambs observed a reduction of 78% in the cholesterol content of LD muscle due to implantation with zeranol respect to control group.…”

Section: Solomonmentioning

confidence: 93%

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Effects of castration and zeranol on fatty acid composition and cholesterol content of hair lamb meat

Villalobos-Villalobos

González‐Ríos

Núñez-González

et al. 2013

Journal of Applied Animal Research

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Hair lambs (n 072, crosses of Blackbelly, Dorper, and Katahdin breeds) with an average age of 90 days (21.49 2.3 kg of BW) were used to investigate the effects of sex class (CLASS: ram vs. wether) and zeranol implant (IMP: control vs. 12 mg) on fat and cholesterol content, and fatty acids (FAs) composition of intramuscular longissimus dorsi (LD) and biceps femoris (BF) and subcutaneous fat (SBC) depots of the loin area. Animals were assigned to one of four treatments with a factorial arrangement (n 018): (1) rams (R), (2) rams implanted with 12 mg zeranol (IR), (3) wether lambs (W), and (4) wether lambs implanted with 12 mg zeranol (IW). FAs C12:0 and C15:0 FAs were significantly higher in the wether's LD. The amount of C22:1 n-9 and C24:1 in rams' LD was higher than those of wethers. Wethers had a higher content of C18:1 cis 9 than R group, and the content of this cis isomer was significantly lower in the implanted group. LD of rams contained a higher amount of polyunsaturated fatty acid (PUFA) and a higher PUFA/saturated fatty acid ratio. Cholesterol content in the three tissues (LD, BF, and SBC) was affected significantly by the CLASS)IMP interaction and was higher in wethers without implant. The sex class was the most important factor affecting lipid composition in hair lambs. The higher PUFA content in meat from rams may suggest a nutritional advantage in comparison to meat from wethers.

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Section: Resultssupporting

confidence: 93%

Section: Solomonsupporting

confidence: 92%

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Effects of castration and zeranol on fatty acid composition and cholesterol content of hair lamb meat

Villalobos-Villalobos

González‐Ríos

Núñez-González

et al. 2013

Journal of Applied Animal Research

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“…Therefore, the use of synthetic growth promoters is both a production strategy as well as an option to decrease fat deposition and thus satisfy consumer preferences for lean meats [139]. However, in terms of the type of fat, there are few studies that have demonstrated positive changes in the fatty acid profile and cholesterol [140], and moreover, there are few in vivo studies that have evaluated whether the addition of phytochemicals modifies the fatty acid profile. Zhou et al [110] reported an increase in the concentration of unsaturated fatty acids in the meat of pigs consuming extracts of the herb Coptis chinensis , and, in a similar study, Kamboh and Zhu [89] observed that the proportion of total polyunsaturated fatty acids (PUFA), the omega fatty acid ratio (n-6/ n-3) and the PUFA/SFA ratio in broiler breast muscles were significantly improved with the inclusion of different levels of the bioflavonoids genistein and hesperidin.…”

Section: Meat Qualitymentioning

confidence: 99%

Dietary inclusion effects of phytochemicals as growth promoters in animal production

et al. 2017

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Growth promoters have been widely used as a strategy to improve productivity, and great benefits have been observed throughout the meat production chain. However, the prohibition of growth promoters in several countries, as well as consumer rejection, has led industry and the academy to search for alternatives. For decades, the inclusion of phytochemicals in animal feed has been proposed as a replacement for traditional growth promoters. However, there are many concerns about the application of phytochemicals and their impact on the various links in the meat production chain (productive performance, carcass and meat quality). Therefore, the effects of these feed additives are reviewed in this article, along with their potential safety and consumer benefits, to understand the current state of their use. In summary, the replacement of traditional growth promoters in experiments with broilers yielded benefits in all aspects of the meat production chain, such as improvements in productive performance and carcass and meat quality. Although the effects in pigs have been similar to those observed in broilers, fewer studies have been carried out in pigs, and there is a need to define the types of phytochemicals to be used and the appropriate stages for adding such compounds. In regard to ruminant diets, few studies have been conducted, and their results have been inconclusive. Therefore, it is necessary to propose more in vivo studies to determine other strategies for phytochemical inclusion in the production phases and to select the appropriate types of compounds. It is also necessary to define the variables that will best elucidate the mechanism(s) of action that will enable the future replacement of synthetic growth promoters with phytochemical feed additives.

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“…Its molecular structure is shown in Figure 5 [87]: It has been cited that ZER is one of the compounds commonly used as a growth promoter to increase feed efficiency in livestock production. [88]. "The use of this anabolic agent in animals may leave harmful residues with a long half-life and stability in tissues intended for human consumption.…”

Section: Zeranolmentioning

confidence: 99%

Electrochemical Biosensors for the Determination of Toxic Substances Related to Food Safety Developed in South America: Mycotoxins and Herbicides

et al. 2017

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The goal of achieving food safety and quality has become increasingly important in relevant areas. The achievement of this objective includes a significant effort in different areas related to the production of raw materials, storage, transportation, etc. One of the central areas in the verification of food safety and food quality control is related to the analysis of food components and, in particular, possible toxic substances that they may contain. Therefore, the demand for appropriate methods for the determination of these substances is increasingly demanding. Thus, not only is accuracy and precision sought in the results of the analysis, but also the speed, simplicity and lowering of costs. In this way, electrochemical techniques and, particularly, electrochemical biosensors have emerged in recent times as good candidates to satisfy such requirements. This review summarizes the advances made in research and development centers located in South American countries related to the development of electrochemical biosensors for the determination of toxic substances present in foods, particularly mycotoxins and herbicides.

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Changes in intramuscular fat, fatty acid profile and cholesterol content induced by zeranol implantation strategy in hair lambs

Abstract: The results indicate that it is possible to induce favorable changes in the fatty acid profile and cholesterol content using a zeranol implantation strategy on hair lambs.

Cited by 7 publications

References 28 publications

Effects of castration and zeranol on fatty acid composition and cholesterol content of hair lamb meat

Effects of castration and zeranol on fatty acid composition and cholesterol content of hair lamb meat

Dietary inclusion effects of phytochemicals as growth promoters in animal production

Electrochemical Biosensors for the Determination of Toxic Substances Related to Food Safety Developed in South America: Mycotoxins and Herbicides

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