Special Issue "Polyphenols in Animal Nutrition: Biological Effects"

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Animal Nutrition".

Deadline for manuscript submissions: 31 January 2022.

Special Issue Editors

Dr. Susana Chamorro
E-Mail Website
Guest Editor
Department of Genetics, Physiology and Microbiology (Animal Physiology Unit), Faculty of Biology, Universidad Complutense de Madrid, 28040 Madrid, Spain
Interests: nutrition and health; polyphenols; antioxidants; intestinal microbiota; metabolism; bioavailability
Dr. Carlos Romero
E-Mail Website
Guest Editor
Universidad Católica de Ávila, Ávila, Spain
Interests: nutrition and livestock products quality

Special Issue Information

Dear Colleagues,

Plants and their biologically active constituents provide numerous opportunities for improving animal health. Among these constituents, the polyphenols which are also present in agro-industrial by-products display antioxidant and anti-inflammatory properties which may have potential in the prevention or treatment of oxidative stress. Another growing area of interest is related to the interactions between these bioactive compounds and the intestinal microbiota and, consequently, their antimicrobial and/or prebiotic potential. However, polyphenols might also interact with other nutrients and metabolites, thereby affecting nutrient efficiency and animal performance. To understand their biological effects and in order to optimize the health benefits without resulting in performance impairment, it is necessary to investigate the metabolism and bioavailability of polyphenols and to identify the bioactive substances that can reach target tissues.

The aim of this Special Issue is to provide a number of documents focused on the evaluation of the biological effects of polyphenols including health, productive performances, animal welfare, and the quality of their derived products. Papers dealing with the characterization of sources of polyphenols likely to be included in animal (farm and pet) diets, and the metabolism and bioavailability of polyphenols in different species will also be welcome.

Dr. Susana Chamorro
Dr. Carlos Romero
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • polyphenols
  • animal nutrition
  • health
  • antioxidant
  • intestinal microbiota
  • bioavailability
  • metabolites
  • animal product quality

Published Papers (4 papers)

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Research

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Article
Purple Corn Anthocyanin Affects Lipid Mechanism, Flavor Compound Profiles, and Related Gene Expression of Longissimus Thoracis et Lumborum Muscle in Goats
Animals 2021, 11(8), 2407; https://doi.org/10.3390/ani11082407 - 14 Aug 2021
Viewed by 462
Abstract
The current study aimed to investigate the effect of anthocyanins on muscle flavor compound profiles in goats. Goats in three groups were fed a basic diet or a diet supplemented with 0.5 g/d or 1 g/d anthocyanin-rich purple corn pigment (PCP). Compared to [...] Read more.
The current study aimed to investigate the effect of anthocyanins on muscle flavor compound profiles in goats. Goats in three groups were fed a basic diet or a diet supplemented with 0.5 g/d or 1 g/d anthocyanin-rich purple corn pigment (PCP). Compared to the control group, plasma total cholesterol was significantly decreased (p < 0.05) in the anthocyanin groups. The feeding of anthocyanin increased (p < 0.05) flavor compound types and total alcohol level, whereas it decreased (p < 0.05) total hydrocarbons, aromatics, esters, and miscellaneous compounds in the longissimusthoracis et lumborum muscle (LTL). Adding PCP to the diet enriched (p < 0.05) vegetal, herbaceous, grease, and fruity flavors compared to the control group. The 0.5 g/d PCP group had increased (p < 0.05) abundance of peroxisome proliferator-activated receptor gamma, but there was a decreased (p < 0.05) level of lipoprotein lipase in LTL. Collectively, this study indicated that anthocyanin can improve mutton flavor by decreasing plasma lipid parameters and by modulating the abundance of several flavor-related genes of goats. Full article
(This article belongs to the Special Issue Polyphenols in Animal Nutrition: Biological Effects)
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Article
Annatto seeds as Antioxidants Source with Linseed Oil for Dairy Cows
Animals 2021, 11(5), 1465; https://doi.org/10.3390/ani11051465 - 20 May 2021
Viewed by 708
Abstract
This study aimed to evaluate the effects of annatto seeds, linseed oil and their combination on DMI, apparent total tract digestibility, antioxidant capacity and milk composition of dairy cows. Four lactating Holstein cows (120 ± 43 days in milk; 15.98 ± 2.02 kg [...] Read more.
This study aimed to evaluate the effects of annatto seeds, linseed oil and their combination on DMI, apparent total tract digestibility, antioxidant capacity and milk composition of dairy cows. Four lactating Holstein cows (120 ± 43 days in milk; 15.98 ± 2.02 kg of milk/day, mean ± SD) were allocated in a 4 × 4 Latin square with a 2 × 2 factorial arrangement (with or without annatto seeds at 15 g/kg of dry matter (DM); with or without linseed oil at 30 g/kg of DM) and provided four different diets: control (no annatto seeds or linseed oil); annatto seeds (15 g/kg of DM); linseed oil (30 g/kg of DM); and a combination of both annatto seeds and linseed oil. Annatto seeds reduced DM intake, and milk yield, protein and lactose, but increased content of fat, total solids and short chain fatty acid, with no effect on total antioxidant capacity of milk. Linseed oil supplementation decreased medium chain fatty acid proportion and n-6/n-3 ratio, conversely it increased long chain fatty acids and n-3 fatty acid content of milk, ether extract intake and total-tract digestibility. Thus, linseed oil supplementation in dairy cow diets improved the milk FA profile but decreased milk fat concentration, whereas annatto seeds did not influence antioxidant capacity and depressed feed intake and milk yield. Full article
(This article belongs to the Special Issue Polyphenols in Animal Nutrition: Biological Effects)
Article
Effects of Flavonoids Extracted from Citrus aurantium on Performance, Behavior, and Rumen Gene Expression in Holstein Bulls Fed with High-Concentrate Diets in Pellet Form
Animals 2021, 11(5), 1387; https://doi.org/10.3390/ani11051387 - 13 May 2021
Viewed by 398
Abstract
Flavonoid supplementation may modify the behavior and rumen inflammatory response of fattening bulls, and this could be related to the concentrate presentation (mash or pellet) form. In the present study, 150 Holstein bulls (183.0 ± 7.53 kg BW and 137 ± 1.8 d [...] Read more.
Flavonoid supplementation may modify the behavior and rumen inflammatory response of fattening bulls, and this could be related to the concentrate presentation (mash or pellet) form. In the present study, 150 Holstein bulls (183.0 ± 7.53 kg BW and 137 ± 1.8 d of age) were randomly allocated to one of eight pens and assigned to control (C) or (BF) (Citrus aurantium, Bioflavex CA, HealthTech Bio Actives, Spain, 0.4 kg per ton of concentrate of Bioflavex CA, 20% naringin). Concentrate (pellet) intake was recorded daily, and BW and animal behavior fortnightly. Animals were slaughtered after 168 d of study, and ruminal epithelium samples were collected for gene expression analyses. Treatment did not affect animal performance; however, BF supplementation reduced agonistic interactions and oral non-nutritive behaviors and increased the time devoted to eating concentrate and ruminating activity (p < 0.05). The gene expression of some genes in the rumen epithelium was greater or tended to be greater in BF than C bulls (bitter taste receptor 16, cytokine IL-25, β-defensin; p < 0.10; pancreatic polypeptide receptor 1 and tumor necrosis factor alpha; p < 0.05). In conclusion, flavonoid supplementation modifies the expression of genes in the rumen epithelium that could be related to inflammation and animal behavior modulation. Full article
(This article belongs to the Special Issue Polyphenols in Animal Nutrition: Biological Effects)
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Review

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Review
Dietary Polyphenol Supplementation in Food Producing Animals: Effects on the Quality of Derived Products
Animals 2021, 11(2), 401; https://doi.org/10.3390/ani11020401 - 05 Feb 2021
Cited by 3 | Viewed by 875
Abstract
The growing interest in producing healthier animal products with a higher ratio of polyunsaturated to saturated fatty acids, is associated with an increase in lipoperoxidation. For this reason, it is essential to attenuate oxidative deterioration in the derived products. Natural antioxidants such as [...] Read more.
The growing interest in producing healthier animal products with a higher ratio of polyunsaturated to saturated fatty acids, is associated with an increase in lipoperoxidation. For this reason, it is essential to attenuate oxidative deterioration in the derived products. Natural antioxidants such as polyphenols represent a good candidate in this respect. The first part of the review highlights the occurrence, bioavailability, and the role of polyphenols in food-producing animals that, especially in intensive systems, are exposed to stressful situations in which oxidation plays a crucial role. The second part offers an overview of the effects of polyphenols either supplemented to the diet of monogastric and ruminants or added directly to meat and dairy products on the physicochemical and sensorial properties of the product. From this review emerges that polyphenols play an important, though not always clear, role in the quality of meat and meat products, milk and dairy products. It cannot be ruled out that different compounds or amounts of polyphenols may lead to different results. However, the inclusion of agro-industrial by-products rich in polyphenols, in animal feed, represents an innovative and alternative source of antioxidants as well as being useful in reducing environmental and economic impact. Full article
(This article belongs to the Special Issue Polyphenols in Animal Nutrition: Biological Effects)
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