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Riaz MF, Mahmud A, Hussain J, Saima. Impact of dichromatic lighted incubation on hatching result and post-hatch performance of broiler chickens. Trop Anim Health Prod 2024; 56:146. [PMID: 38722408 DOI: 10.1007/s11250-024-04000-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 04/23/2024] [Indexed: 06/12/2024]
Abstract
This study was planned to evaluate the impact of dichromatic lights during incubation on the hatching and post-hatch performance of broiler chickens. A total of 500 eggs of broiler breeder (Ross 308; Age 44 weeks) were evenly divided according to a completely randomized design into 4 treatments having 5 replicates and 25 eggs each. Treatments consisted of dichromatic lights Blue + Red (BR), Green + Red (GR) and Green + Blue (GB) provided at an intensity of 250 lx for 12 h a day along with a Dark (D) environment. After hatching 200 chicks (50 from each respective light group) were divided into 4 treatments with 5 replicates each having 10 chicks. Results indicated a higher embryo index (13.12%) in the GR group on the 12th day of incubation; while an ideal hatch window was observed in GR and GB (98.18% and 96.00% hatched chicks) lighting groups. In hatching traits, higher hatchability (86.15) and hatch of fertile (93.85) percentages were observed in GR lighting followed by GB, BR and Dark treatment groups; while dead-in shell embryos were lowest in the GR group. In growth performance, higher feed intake (513.20 g) and body weight (479.20 g) were observed in the GB group followed by GR, BR and dark group; and feed conversion ratio (FCR) was better in the GR group (1.06). In welfare parameters, improved physical asymmetry (0.90 mm) and tonic immobility (54.40 s) were measured in the GR group followed by GB, BR and the dark group. It was concluded that under experimental conditions when broiler breeder eggs are provided with GR lighting during incubation, it can help to improve hatchability, growth performance and welfare traits in chicks.
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Affiliation(s)
- Muhammad Faisal Riaz
- Department of Poultry Production, Faculty of Animal Production and Technology, University of Veterinary and Animal Sciences, Lahore, Pakistan.
- Department of Poultry Science, Faculty of Veterinary and Animal Sciences, Muhammad Nawaz Shareef University of Agriculture, Multan, Pakistan.
| | - Athar Mahmud
- Department of Poultry Production, Faculty of Animal Production and Technology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Jibran Hussain
- Department of Poultry Production, Faculty of Animal Production and Technology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Saima
- Department of Animal Nutrition, Faculty of Animal Production and Technology, University of Veterinary and Animal Sciences, Lahore, Pakistan
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Horodincu L, Solcan C. Influence of Different Light Spectra on Melatonin Synthesis by the Pineal Gland and Influence on the Immune System in Chickens. Animals (Basel) 2023; 13:2095. [PMID: 37443893 DOI: 10.3390/ani13132095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/12/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
It is well known that the pineal gland in birds influences behavioural and physiological functions, including those of the immune system. The purpose of this research is to examine the endocrine-immune correlations between melatonin and immune system activity. Through a description of the immune-pineal axis, we formulated the objective to determine and describe: the development of the pineal gland; how light influences secretory activity; and how melatonin influences the activity of primary and secondary lymphoid organs. The pineal gland has the ability to turn light information into an endocrine signal suitable for the immune system via the membrane receptors Mel1a, Mel1b, and Mel1c, as well as the nuclear receptors RORα, RORβ, and RORγ. We can state the following findings: green monochromatic light (560 nm) increased serum melatonin levels and promoted a stronger humoral and cellular immune response by proliferating B and T lymphocytes; the combination of green and blue monochromatic light (560-480 nm) ameliorated the inflammatory response and protected lymphoid organs from oxidative stress; and red monochromatic light (660 nm) maintained the inflammatory response and promoted the growth of pathogenic bacteria. Melatonin can be considered a potent antioxidant and immunomodulator and is a critical element in the coordination between external light stimulation and the body's internal response.
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Affiliation(s)
- Loredana Horodincu
- Preclinics Department, Faculty of Veterinary Medicine, "Ion Ionescu de la Brad" Iasi University of Life Sciences, Mihail Sadoveanu Alley, 700489 Iasi, Romania
| | - Carmen Solcan
- Preclinics Department, Faculty of Veterinary Medicine, "Ion Ionescu de la Brad" Iasi University of Life Sciences, Mihail Sadoveanu Alley, 700489 Iasi, Romania
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Sun Y, Li Y, Ma S, Shi L, Chen C, Li D, Guo J, Ma H, Yuan J, Chen J. Effects of LED Lights with Defined Spectral Proportion on Growth and Reproduction of Indigenous Beijing-You Chickens. Animals (Basel) 2023; 13:ani13040616. [PMID: 36830401 PMCID: PMC9951764 DOI: 10.3390/ani13040616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
Light presents an important exogenous factor for poultry. This study examined effects of LED lights with different defined spectrums on growth and reproduction of indigenous Beijing-You chickens. A total of 576 one-day old female chicks were divided into 16 rooms, and each were exposed to four different lights: LED A (21% green light, 30% blue light, 24% yellow light, and 25% red light), B (35%, 35%, 18%, and 12%), C (27%, 30%, 22%, and 21%), or compact fluorescent lamps (CFL, 15%, 28%, 41%, and 16%). Results showed that feed intake and feed conversion ratio were comparable among treatments throughout the 17 week rearing period (p > 0.05). LED C showed similar body weight gain with CFL, but higher than LED A and B. The CFL birds start to lay on 132.25 d, while LED B did not lay until 148.25 d. The age at 50% egg production did not vary among groups (p = 0.12). Total egg number until 43 week of LED B was higher than others (p < 0.05). Therefore, LED lights with defined spectral proportion have different effects on chickens' growth and reproduction. The LED C promotes the prepubertal growth, and the LED B provides proper sexual maturation age and better egg-laying persistence.
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Affiliation(s)
- Yanyan Sun
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yunlei Li
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Shumei Ma
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- Pingliang Academy of Agricultural Sciences, Pingliang 744000, China
| | - Lei Shi
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- College of Animal Science and Technology, Hebei Agricultural University, Baoding 071001, China
| | - Chao Chen
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Dongli Li
- Beijing Bainianliyuan Ecological Agriculture Co., Ltd., Beijing 101599, China
| | - Jiangpeng Guo
- Beijing Innovation Consortium of Agriculture Research System, Beijing Animal Husbandry and Veterinary Station, Beijing 100101, China
| | - Hui Ma
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Jingwei Yuan
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Jilan Chen
- Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
- Correspondence: ; Tel.: +86-10-6281-6005
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Polysaccharides from Medicine and Food Homology Materials: A Review on Their Extraction, Purification, Structure, and Biological Activities. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103215. [PMID: 35630690 PMCID: PMC9147777 DOI: 10.3390/molecules27103215] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/11/2022] [Accepted: 05/13/2022] [Indexed: 01/16/2023]
Abstract
Medicine and food homology (MFH) materials are rich in polysaccharides, proteins, fats, vitamins, and other components. Hence, they have good medical and nutritional values. Polysaccharides are identified as one of the pivotal bioactive constituents of MFH materials. Accumulating evidence has revealed that MFH polysaccharides (MFHPs) have a variety of biological activities, such as antioxidant, immunomodulatory, anti-tumor, hepatoprotective, anti-aging, anti-inflammatory, and radioprotective activities. Consequently, the research progress and future prospects of MFHPs must be systematically reviewed to promote their better understanding. This paper reviewed the extraction and purification methods, structure, biological activities, and potential molecular mechanisms of MFHPs. This review may provide some valuable insights for further research regarding MFHPs.
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Yan J, Chen Q, Tian L, Li K, Lai W, Bian L, Han J, Jia R, Liu X, Xi Z. Intestinal toxicity of micro- and nano-particles of foodborne titanium dioxide in juvenile mice: Disorders of gut microbiota-host co-metabolites and intestinal barrier damage. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 821:153279. [PMID: 35074372 DOI: 10.1016/j.scitotenv.2022.153279] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 01/09/2022] [Accepted: 01/16/2022] [Indexed: 05/28/2023]
Abstract
The wide use of TiO2 particles in food and the high exposure risk to children have prompted research into the health risks of TiO2. We used the microbiome and targeted metabolomics to explore the potential mechanism of intestinal toxicity of foodborne TiO2 micro-/nanoparticles after oral exposure for 28 days in juvenile mice. Results showed that the gut microbiota-including the abundance of Bacteroides, Bifidobacterium, Lactobacillus, and Prevotella-changed dynamically during exposure. The organic inflammatory response was activated, and lipopolysaccharide levels increased. Intestinal toxicity manifested as increased mucosal permeability, impaired intestinal barrier, immune damage, and pathological changes. The expression of antimicrobial peptides, occludin, and ZO-1 significantly reduced, while that of JNK2 and Src/pSrc increased. Compared with micro-TiO2 particles, the nano-TiO2 particles had strong toxicity. Fecal microbiota transplant confirmed the key role of gut microbiota in intestinal toxicity. The levels of gut microbiota-host co-metabolites, including pyroglutamic acid, L-glutamic acid, phenylacetic acid, and 3-hydroxyphenylacetic acid, changed significantly. Significant changes were observed in the glutathione and propanoate metabolic pathways. There was a significant correlation between the changes in gut microbiota, metabolites, and intestinal cytokine levels. These, together with the intestinal barrier damage signaling pathway, constitute the network mechanism of the intestinal toxicity of TiO2 particles.
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Affiliation(s)
- Jun Yan
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Qi Chen
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Lei Tian
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Kang Li
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Wenqing Lai
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Liping Bian
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Jie Han
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Rui Jia
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China
| | - Xiaohua Liu
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China.
| | - Zhuge Xi
- Tianjin Institute of Environmental & Operational Medicine, No. 1, Dali Road, Heping District, Tianjin 300050, China.
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Tan Z, Sun J, Liu X, Liu J, Wang S. Interactions between color and intensity of LED light on growth performance, serum biochemical profile, immune response variable, and nutrient apparent utilization in broiler chicken. Anim Sci J 2022; 93:e13717. [PMID: 35445771 DOI: 10.1111/asj.13717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 02/24/2022] [Accepted: 03/04/2022] [Indexed: 11/01/2022]
Abstract
This study investigated the effects of light-emitting diode (LED) color and intensity of broilers. One-day-old Cobb-500 broilers (n = 648) were fed nine groups with six replicates; three light colors (white, blue, & green) and intensities (for 1 to 7 days, viz., 20, 40, and 60 lx; for 8 to 42 days, viz., 5, 10, and 15 lx) were applied. Test lasted for 42 days. Results indicated that compared with blue light, 60-lx white light for 1 to 7 days increased the average daily gain (ADG) and average daily feed intake (ADFI) of broilers (p < 0.01). In the 10-lx light groups, the levels of interleukin-2 (IL-2) and the concentrations of albumin (ALB) (p < 0.05) increased. Moreover, the nutrient apparent utilization for ether extract (EE) under 10-lx green light was higher than that under 15-lx blue light (p < 0.01). The interaction effects of light intensity and light color had an extremely significant influence on the ADG for 1 to 7 days, IL-2 level, ALB content, and EE apparent utilization rate (p < 0.01) and had a significant influence on the ADFI and F/G for 1 to 7 days (p < 0.05). The production performance of broilers reared in three-layer cage could be improved by using 60-lx white LED light for 1 to 7 days and 5- to 10-lx green LED light or 10-lx white LED light for 8 to 42 days.
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Affiliation(s)
- Zichao Tan
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, China
| | - Jinling Sun
- College of Science and Information, Qingdao Agricultural University, Qingdao, China
| | - Xiaodong Liu
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
| | - Jie Liu
- College of Science and Information, Qingdao Agricultural University, Qingdao, China
| | - Shubai Wang
- College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, China
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Zhang Y, Wang Z, Dong Y, Cao J, Chen Y. Melatonin Nuclear Receptors Mediate Green-and-Blue-Monochromatic-Light-Combinations-Inhibited B Lymphocyte Apoptosis in the Bursa of Chickens via Reducing Oxidative Stress and Nfκb Expression. Antioxidants (Basel) 2022; 11:antiox11040748. [PMID: 35453433 PMCID: PMC9029876 DOI: 10.3390/antiox11040748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/04/2022] [Accepted: 04/07/2022] [Indexed: 11/16/2022] Open
Abstract
Previous studies found that melatonin modulates a combination of green-and-blue-light-induced B-lymphocyte proliferation via its membrane receptors Mel1a and Mel1c. However, in addition to its membrane-bound receptors, melatonin also functions through binding to nuclear receptors RORα/RORβ/RORγ. In this study, we raised 120 chicks under 400–700 nm white (WW), 660 nm red (RR), 560 nm green (GG) and 480 nm blue light (BB) from P0 to P26. From P27 to P42, half of the chickens in green, blue and red were switched to blue (G→B), green (B→G) and red (R→B), respectively. We used immunohistochemistry, Western blotting, qRT-PCR, Elisa and MTT to investigate the influence of various monochromatic light combinations on the bursal B lymphocyte apoptosis and oxidative stress levels as well as estimate whether melatonin and its nuclear receptors were involved in this process. Consistent with the increase in the plasma melatonin concentration and antioxidant enzyme activity, we observed that G→B significantly decreased the RORα, RORγ mRNA level, inhibited Bax, Caspase-3 and p-iκb, p-p65 protein expression, increased the IL-10 level and Nrf2, HO-1 protein expression, down-regulated the MDA and pro-inflammatory IL-6, TNF-α and IFN-γ levels in the bursa compared with WW, RR, GG, BB and R→B, respectively. Our in vitro results showed exogenous melatonin supplementation inhibited B-lymphocyte apoptosis, decreased IL-6, TNF-α, IFN-γ and ROS production, down-regulated RORα, RORγ mRNA level and p-iκb and p-p65 protein expression, whereas it improved the IL-10 level and Nrf2 and the HO-1 protein expression in bursal B lymphocyte. Moreover, these responses were abrogated by RORα agonist SR1078 but were mimicked by RORα antagonist SR3335 or RORγ antagonist GSK2981278. In addition, p65 antagonist BAY reversed RORα/RORγ-mediated G→B-inhibited bursal B lymphocyte apoptosis. Overall, we concluded that melatonin nuclear RORα/RORγ mediates G→B-inhibited bursal B lymphocyte apoptosis via reducing oxidative stress and Nfκb expression.
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Affiliation(s)
| | | | | | | | - Yaoxing Chen
- Correspondence: ; Tel.: +86-10-6273-3778; Fax: +86-10-6273-3199
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Abo-Al-Ela HG, El-Kassas S, El-Naggar K, Abdo SE, Jahejo AR, Al Wakeel RA. Stress and immunity in poultry: light management and nanotechnology as effective immune enhancers to fight stress. Cell Stress Chaperones 2021; 26:457-472. [PMID: 33847921 PMCID: PMC8065079 DOI: 10.1007/s12192-021-01204-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/30/2021] [Accepted: 04/04/2021] [Indexed: 02/07/2023] Open
Abstract
The poultry industry plays a significant role in boosting the economy of several countries, particularly developing countries, and acts as a good, cheap, and affordable source of animal protein. A stress-free environment is the main target in poultry production. There are several stressors, such as cold stress, heat stress, high stocking density, and diseases that can affect birds and cause several deleterious changes. Stress reduces feed intake and growth, as well as impairs immune response and function, resulting in high disease susceptibility. These effects are correlated with higher corticosteroid levels that modulate several immune pathways such as cytokine-cytokine receptor interaction and Toll-like receptor signaling along with induction of excessive production of reactive oxygen species (ROS) and thus oxidative stress. Several approaches have been considered to boost bird immunity to overcome stress-associated effects. Of these, dietary supplementation of certain nutrients and management modifications, such as light management, are commonly considered. Dietary supplementations improve bird immunity by improving the development of lymphoid tissues and triggering beneficial immune modulators and responses. Since nano-minerals have higher bioavailability compared to inorganic or organic forms, they are highly recommended to be included in the bird's diet during stress. Additionally, light management is considered a cheap and safe approach to control stress. Changing light from continuous to intermittent and using monochromatic light instead of the normal light improve bird performance and health. Such changes in light management are associated with a reduction of ROS production and increased antioxidant production. In this review, we discuss the impact of stress on the immune system of birds and the transcriptome of oxidative stress and immune-related genes, in addition, how nano-minerals supplementations and light system modulate or mitigate stress-associated effects.
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Affiliation(s)
- Haitham G Abo-Al-Ela
- Genetics and Biotechnology, Department of Aquaculture, Faculty of Fish Resources, Suez University, Suez, 43518, Egypt.
| | - Seham El-Kassas
- Animal, Poultry and Fish Breeding and Production, Department of Animal Wealth Development, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt.
| | - Karima El-Naggar
- Department of Nutrition and Veterinary Clinical Nutrition, Faculty of Veterinary Medicine, Alexandria University, Edfina, 22758, Egypt
| | - Safaa E Abdo
- Genetics and Genetic Engineering, Department of Animal Wealth Development, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Ali Raza Jahejo
- College of Veterinary Medicine, Shanxi Agricultural University, Jinzhong, 030801, China
| | - Rasha A Al Wakeel
- Department of Physiology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
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Oke OE, Oni AI, Adebambo PO, Oso OM, Adeoye MM, Lawal TG, Afolayan TR, Ogunbajo OE, Ojelade DI, Bakre OA, Daramola JO, Smith OF. Evaluation of light colour manipulation on physiological response and growth performance of broiler chickens. Trop Anim Health Prod 2020; 53:6. [PMID: 33200317 DOI: 10.1007/s11250-020-02432-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 10/12/2020] [Indexed: 12/14/2022]
Abstract
Artificial illumination, including light quality, is crucial in modern broiler management. The aim of this study was to examine the effect of a switch in light colour on the performance of broiler chickens in tropical environments. A total of 280 1-day-old Arbor acre male chicks were used for this study and were weighed and assigned to different light environments viz. white (WH), green (GR), blue (BL), GR switched to BL at 14 days (GB), BL switched to GR at 14 days (BG), BL switched to GR at 28 days (BGG) and GR switched to BL at 28 days (GBB) having four replicates of ten birds each. Body weight, weight gain, feed intake and feed conversion ratio were recorded weekly. Blood samples were collected from 2 birds per replicate weekly for the determination of plasma triiodothyronine (T3), haematology and serum biochemical parameters. The experiment was laid out in a completely randomised design. Results showed that the final body weights of the birds in GBB and GB were comparable but higher than those of the other treatment groups. Feed intake of the chickens in WH was similar to that of BG but higher than those of the other treatment groups, while FCR of the birds in WH was higher (P < 0.05) than the other treatment groups. Plasma T3 of the birds in GR was comparable to that of birds in BL but significantly higher than those of the birds in WH and a similar trend was also observed at weeks 1 and 2. Heterophil/lymphocyte ratio (H/L) of the birds in WH was significantly higher than those of BL and GR whose values were similar to those in GB and BG. Heterophil/lymphocytes of the birds in WH was higher than those of BG, GR, BGG, GB and GBB but similar to those of BL. The breast muscle of the birds in GBB and GB was similar to those of BGG and GR and significantly higher than those of WH, BL and BG. Based on the results obtained in this study, it was concluded that the use of green light up to 28 days in combination with blue light stimulated the growth of broiler chickens and manipulation of light colours can be used to improve the welfare and performance of chickens.
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Affiliation(s)
- O E Oke
- World Bank Centre of Excellence in Poultry Science, University of Lome, Lome, Togo. .,Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria.
| | - A I Oni
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - P O Adebambo
- Department of Physics, Federal University of Agriculture, Abeokuta, Nigeria
| | - O M Oso
- World Bank Centre of Excellence in Poultry Science, University of Lome, Lome, Togo
| | - M M Adeoye
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - T G Lawal
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - T R Afolayan
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - O E Ogunbajo
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - D I Ojelade
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - O A Bakre
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - J O Daramola
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
| | - O F Smith
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
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Hofmann T, Schmucker SS, Bessei W, Grashorn M, Stefanski V. Impact of Housing Environment on the Immune System in Chickens: A Review. Animals (Basel) 2020; 10:E1138. [PMID: 32635616 PMCID: PMC7401558 DOI: 10.3390/ani10071138] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 06/29/2020] [Accepted: 07/01/2020] [Indexed: 12/11/2022] Open
Abstract
During their lifespan, chickens are confronted with a wide range of acute and chronic stressors in their housing environment that may threaten their welfare and health by modulating the immune system. Especially chronic stressful conditions can exceed the individual's allostatic load, with negative consequences for immunity. A fully functional immune system is mandatory for health and welfare and, consequently, also for high productivity and safe animal products. This review provides a comprehensive overview of the impact of housing form, light regime as well as aerial ammonia and hydrogen sulfide concentrations on the immune system in chickens. Certain housing conditions are clearly associated with immunological alterations which potentially impair the success of vaccinations or affect disease susceptibility. Such poor conditions counteract sustainable poultry production. This review also outlines current knowledge gaps and provides recommendations for future research.
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Affiliation(s)
- Tanja Hofmann
- Department of Behavioral Physiology of Livestock, Institute of Animal Science, University of Hohenheim, Garbenstr, 17, 70599 Stuttgart, Germany;
| | - Sonja S. Schmucker
- Department of Behavioral Physiology of Livestock, Institute of Animal Science, University of Hohenheim, Garbenstr, 17, 70599 Stuttgart, Germany;
| | - Werner Bessei
- Department of Livestock Population Genomics, Institute of Animal Science, University of Hohenheim, Garbenstr, 17, 70599 Stuttgart, Germany; (W.B.); (M.G.)
| | - Michael Grashorn
- Department of Livestock Population Genomics, Institute of Animal Science, University of Hohenheim, Garbenstr, 17, 70599 Stuttgart, Germany; (W.B.); (M.G.)
| | - Volker Stefanski
- Department of Behavioral Physiology of Livestock, Institute of Animal Science, University of Hohenheim, Garbenstr, 17, 70599 Stuttgart, Germany;
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11
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Yang Y, Zhen C, Yang B, Yu Y, Pan J. The effect of 580 nm-based-LED mixed light on growth, adipose deposition, skeletal development, and body temperature of chickens. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 183:288-292. [PMID: 29751262 DOI: 10.1016/j.jphotobiol.2018.04.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 04/08/2018] [Accepted: 04/26/2018] [Indexed: 01/04/2023]
Abstract
Though previous study indicated that the 580 nm-yellow-LED-light showed an stimulating effect on growth of chickens, the low luminous efficiency of the yellow LED light cannot reflect the advantage of energy saving. In present study, the cool white LED chips and yellow LED chips have been combined to fabricate the white × yellow mixed LED light, with an enhanced luminous efficiency. A total 300 newly hatched chickens were reared under various mixed LED light. The results indicated that the white × yellow mixed LED light had "double-edged sword" effects on bird's body weight, bone development, adipose deposition, and body temperature, depending on variations in ratios of yellow component. Low yellow ratio of mixed LED light (Low group) inhibited body weight, whereas medium and high yellow ratio of mixed LED light (Medium and High groups) promoted body weight, compared with white LED light (White group). A progressive change in yellow component gave rise to consistent changes in body weight over the entire experiment. Moreover, a positive relationship was observed between yellow component and feed conversion ratio. High group-treated birds had greater relative abdominal adipose weight than Medium group-treated birds (P = 0.048), whereas Medium group-treated birds had greater relative abdominal adipose weight than Low group-treated birds (P = 0.044). We found that mixed light improved body weight by enhancing skeletal development (R2 = 0.5023, P = 0.0001) and adipose deposition (R2 = 0.6012, P = 0.0001). Birds in the Medium, High and Yellow groups attained significantly higher surface temperatures compared with the White group (P = 0.010). The results suggest that the application of the mixed light with high level of yellow component can be used successfully to improve growth and productive performance in broilers.
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Affiliation(s)
- Yefeng Yang
- Department of Biosystems Engineering, Zhejiang University, Hangzhou 310058, China
| | - Chenghuang Zhen
- Department of Biosystems Engineering, Zhejiang University, Hangzhou 310058, China
| | - Bo Yang
- Department of Biosystems Engineering, Zhejiang University, Hangzhou 310058, China
| | - Yonghua Yu
- Department of Biosystems Engineering, Zhejiang University, Hangzhou 310058, China
| | - Jinming Pan
- Department of Biosystems Engineering, Zhejiang University, Hangzhou 310058, China.
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Abdo SE, El-Kassas S, El-Nahas AF, Mahmoud S. Modulatory Effect of Monochromatic Blue Light on Heat Stress Response in Commercial Broilers. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:1351945. [PMID: 28698764 PMCID: PMC5494062 DOI: 10.1155/2017/1351945] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Revised: 03/11/2017] [Accepted: 04/12/2017] [Indexed: 12/13/2022]
Abstract
In a novel approach, monochromatic blue light was used to investigate its modulatory effect on heat stress biomarkers in two commercial broiler strains (Ross 308 and Cobb 500). At 21 days old, birds were divided into four groups including one group housed in white light, a second group exposed to blue light, a 3rd group exposed to white light + heat stress, and a 4th group exposed to blue light + heat stress. Heat treatment at 33°C lasted for five h for four successive days. Exposure to blue light during heat stress reduced MDA concentration and enhanced SOD and CAT enzyme activities as well as modulated their gene expression. Blue light also reduced the degenerative changes that occurred in the liver tissue as a result of heat stress. It regulated, though variably, liver HSP70, HSP90, HSF1, and HSF3 gene expression among Ross and Cobb chickens. Moreover, the Cobb strain showed better performance than Ross manifested by a significant reduction of rectal temperature in the case of H + B. Furthermore, a significant linear relationship was found between the lowered rectal temperature and the expression of all HSP genes. Generally, the performance of both strains by most assessed parameters under heat stress is improved when using blue light.
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Affiliation(s)
- Safaa E. Abdo
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Shaikh, Egypt
| | - Seham El-Kassas
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Shaikh, Egypt
| | - Abeer F. El-Nahas
- Department of Animal Husbandry and Animal Wealth Development, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Shawky Mahmoud
- Department of Physiology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Shaikh, Egypt
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Mohamed RA, Abou-Ismail UA, Shukry M. Effects of different monochromatic LED light colours on fear reactions and physiological responses in Mulard ducks. ANIMAL PRODUCTION SCIENCE 2017. [DOI: 10.1071/an15249] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Although the effects of monochromatic light on behaviour and performance of birds have been extensively studied, it is not known how rearing Mulard ducks in different monochromatic lights affects their fear reactions, physiological responses to stress and welfare. A total of 108 newly hatched Mulard ducks, representing three replicates, were housed in either blue light (BL), green light (GL), red light (RL) or white light (WL) for 12 weeks. Ducks were exposed to a light/dark schedule of 23 L/1 D, and food and water were provided ad libitum. At the beginning of the 13th week of the rearing period, behavioural measurements of fear were assessed by using a tonic immobility test, open field test and fear of man test. Physiological responses of the birds to stress such as heterophil : lymphocyte ratio, total leukocyte count and plasma concentrations of corticosterone were also assessed. Results demonstrated that birds exposed to both RL and WL displayed higher levels of behavioural indicators of fear including tonic immobility durations (P < 0.01), latency to first immobilisation (P < 0.001) and avoidance of man index (P < 0.001), and higher levels of physiological indicators of stress such as heterophil : lymphocyte ratios (P < 0.001) and plasmas concentrations of corticosterone (P < 0.001), and lower total leukocytic counts (P < 0.01) compared with birds exposed to either BL or GL. Rearing Mulard ducks in BL or GL appeared to reduce their fear reactions and physiological responses to stress and to enhance their ability to cope with the environment and may therefore improve their welfare.
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Effects of polysaccharide from mycelia of Ganoderma lucidum on intestinal barrier functions of rats. Int J Biol Macromol 2017; 94:1-9. [DOI: 10.1016/j.ijbiomac.2016.09.099] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 09/27/2016] [Accepted: 09/29/2016] [Indexed: 12/30/2022]
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15
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Li S, Cao J, Wang Z, Dong Y, Wang W, Chen Y. Melatonin Mediates Monochromatic Light-induced Insulin-like Growth Factor 1 Secretion of Chick Liver: Involvement of Membrane Receptors. Photochem Photobiol 2016; 92:595-603. [DOI: 10.1111/php.12594] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 03/24/2016] [Indexed: 12/13/2022]
Affiliation(s)
- Suqi Li
- Laboratory of Anatomy of Domestic Animal; College of Animal Medicine; China Agricultural University; Beijing China
| | - Jing Cao
- Laboratory of Anatomy of Domestic Animal; College of Animal Medicine; China Agricultural University; Beijing China
| | - Zixu Wang
- Laboratory of Anatomy of Domestic Animal; College of Animal Medicine; China Agricultural University; Beijing China
| | - Yulan Dong
- Laboratory of Anatomy of Domestic Animal; College of Animal Medicine; China Agricultural University; Beijing China
| | - Wenli Wang
- Department of Animal Husbandry and Veterinary; Beijing Vocational College of Agriculture; Beijing China
| | - Yaoxing Chen
- Laboratory of Anatomy of Domestic Animal; College of Animal Medicine; China Agricultural University; Beijing China
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A new method to manipulate broiler chicken growth and metabolism: Response to mixed LED light system. Sci Rep 2016; 6:25972. [PMID: 27170597 PMCID: PMC4864324 DOI: 10.1038/srep25972] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 04/26/2016] [Indexed: 11/25/2022] Open
Abstract
Present study introduced a new method to manipulate broiler chicken growth and metabolism by mixing the growth-advantage LED. We found that the green/blue LED mixed light system (G-B and G × B) have the similar stimulatory effect on chick body weight with single green light and single blue light (G and B), compared with normal artificial light (P = 0.028). Moreover, the percentage of carcass was significantly greater in the mixed light (G × B) when compared with the single light (P = 0.003). Synchronized with body weight, the mixed light (G-B and G × B) had a significant improved influence on the feed conversion of birds compared with normal light (P = 0.002). A significant improvement in feed conversion were found in mixed light (G × B) compared with single LED light (P = 0.037). G group resulted in a greater high-density lipoprotein cholesterol level than B group (P = 0.002), whereas B group resulted in a greater low-density lipoprotein cholesterol level than G group (P = 0.017). The mixed light significantly increased the birds’ glucose level in comparison with the single light (P = 0.003). This study might establish an effective strategy for maximizing growth of chickens by mixed LED technology.
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Li J, Cao J, Wang Z, Dong Y, Chen Y. Melatonin plays a critical role in inducing B lymphocyte proliferation of the bursa of Fabricius in broilers via monochromatic lights. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 142:29-34. [DOI: 10.1016/j.jphotobiol.2014.11.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 11/05/2014] [Accepted: 11/06/2014] [Indexed: 10/24/2022]
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Pan J, Yang Y, Yang B, Yu Y. Artificial polychromatic light affects growth and physiology in chicks. PLoS One 2014; 9:e113595. [PMID: 25469877 PMCID: PMC4254831 DOI: 10.1371/journal.pone.0113595] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 10/29/2014] [Indexed: 11/18/2022] Open
Abstract
Despite the overwhelming use of artificial light on captive animals, its effect on those animals has rarely been studied experimentally. Housing animals in controlled light conditions is useful for assessing the effects of light. The chicken is one of the best-studied animals in artificial light experiments, and here, we evaluate the effect of polychromatic light with various green and blue components on the growth and physiology in chicks. The results indicate that green-blue dual light has two side-effects on chick body mass, depending on the various green to blue ratios. Green-blue dual light with depleted and medium blue component decreased body mass, whereas enriched blue component promoted body mass in chicks compared with monochromatic green- or blue spectra-treated chicks. Moreover, progressive changes in the green to blue ratios of green-blue dual light could give rise to consistent progressive changes in body mass, as suggested by polychromatic light with higher blue component resulting in higher body mass. Correlation analysis confirmed that food intake was positively correlated with final body mass in chicks (R2 = 0.7664, P = 0.0001), suggesting that increased food intake contributed to the increased body mass in chicks exposed to higher blue component. We also found that chicks exposed to higher blue component exhibited higher blood glucose levels. Furthermore, the glucose level was positively related to the final body mass (R2 = 0.6406, P = 0.0001) and food intake (R2 = 0.784, P = 0.0001). These results demonstrate that spectral composition plays a crucial role in affecting growth and physiology in chicks. Moreover, consistent changes in spectral components might cause the synchronous response of growth and physiology.
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Affiliation(s)
- Jinming Pan
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Yefeng Yang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Bo Yang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Yonghua Yu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
- * E-mail:
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Yu Y, Wang Z, Cao J, Dong Y, Wang T, Chen Y. Effects of monochromatic light stimuli on the development and Muc2 expression of goblet cells in broiler small intestines during embryogenesis. Poult Sci 2014; 93:1801-8. [PMID: 24864285 DOI: 10.3382/ps.2013-03805] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The effects of monochromatic light on the ontogeny, differentiation, and Muc2 expression level in goblet cells were studied in the small intestines of late-stage broiler embryos. The embryos were exposed to blue light (B group), green light (G group), red light (R group), or darkness (D group) throughout the incubation period. On d 15 of incubation (E15), a few acidic goblet cells (only the sulfated subtype) were observed, and Muc2 mRNA expression was detected. On E18, however, neutral, acidic, and intermediate types, as well as the sulfated subtype, were observed in the small intestine, and a decreasing gradient of goblet cell density was found along the duodenum to ileum axis. Up to E21, 3 types of goblet cells and 3 acidic cell subtypes were found in all the small intestines. The goblet cell density increased along the duodenum to ileum axis. Monochromatic light stimulation resulted in no significant differences in the density and types of goblet cells between the different treatment groups on E15 and E18, but an increased Muc2 mRNA expression level was detected on E18 in the G group compared with the other treatment groups. On E21, the goblet cell density, proportion of acidic goblet cells, and Muc2 mRNA expression level increased in the G group compared with other treatment groups. These results suggest that the ontogeny and differentiation of goblet cells in broiler embryos display temporal and spatial differences. Green monochromatic light may have the potential to promote the proliferation and maturation of as well as the expression of Muc2 mRNA in goblet cells of broiler embryos.
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Affiliation(s)
- Y Yu
- Laboratory of Anatomy of Domestic Animal, College of Animal Medicine, China Agricultural University, Haidian, Beijing 100193, China School of Animal Sciences, Henan Institute of Science and Technology, Xinxiang, Henan, 453003, China
| | - Z Wang
- Laboratory of Anatomy of Domestic Animal, College of Animal Medicine, China Agricultural University, Haidian, Beijing 100193, China
| | - J Cao
- Laboratory of Anatomy of Domestic Animal, College of Animal Medicine, China Agricultural University, Haidian, Beijing 100193, China
| | - Y Dong
- Laboratory of Anatomy of Domestic Animal, College of Animal Medicine, China Agricultural University, Haidian, Beijing 100193, China
| | - T Wang
- Laboratory of Anatomy of Domestic Animal, College of Animal Medicine, China Agricultural University, Haidian, Beijing 100193, China
| | - Y Chen
- Laboratory of Anatomy of Domestic Animal, College of Animal Medicine, China Agricultural University, Haidian, Beijing 100193, China
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Li J, Wang Z, Cao J, Dong YL, Chen YX. Role of monochromatic light on development of cecal tonsil in young broilers. Anat Rec (Hoboken) 2014; 297:1331-7. [PMID: 24700675 DOI: 10.1002/ar.22909] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 01/15/2014] [Accepted: 01/27/2014] [Indexed: 11/12/2022]
Abstract
Previously, the different monochromatic lights have been demonstrated to affect splenocyte proliferation and melatonin (MEL) secretion in broilers. The present study was designed to evaluate the effects of different monochromatic lights on the development and immune function of broiler cecal tonsils, and to disclose the mechanisms underlying these phenomena. A total of 185 broilers (P0) including intact, sham-operated, and pinealectomized groups were exposed to blue light (BL), green light (GL), red light (RL), and white light (WL) by a light-emitting diode system for 14 days. Compared with RL groups, the GL in the intact and sham-operated groups showed larger follicle areas (66.70%), higher percentages of proliferating cell nuclear antigen (PCNA)-positive cells (33.33%), increased numbers of IgA(+) cells (48.60%), and increased antioxidase activity (33.33%-61.37%), whereas, the density of iNOS and MDA content in GL were lower (43.63%-54.43%) than that of RL. In contrast, after pinealectomy, the area of follicles, the percentage of PCNA-positive cells, the number of IgA(+) cells, and the antioxidase activity decreased in the different light treatments, but the density of iNOS and MDA content increased substantially. There was no significant difference in these parameters between broilers exposed to GL and other lights (P = 0.085-1.000). The results suggested that the enhanced effects of GL on the development and immune function of cecal tonsils in young broilers were mediated by elevated antioxidative status via up-regulation of MEL.
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Affiliation(s)
- J Li
- Laboratory of Anatomy of Domestic Animal, College of Animal Medicine, China Agricultural University, Beijing, 100193, China; Department of Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China
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A Comparison of Monochromatic and Mixed LED Light Color on Performance, Bone Mineral Density, Meat and Blood Properties, and Immunity of Broiler Chicks. J Poult Sci 2014. [DOI: 10.2141/jpsa.0130049] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Cao J, Wang Z, Dong Y, Zhang Z, Li J, Li F, Chen Y. Effect of combinations of monochromatic lights on growth and productive performance of broilers. Poult Sci 2013; 91:3013-8. [PMID: 23155007 DOI: 10.3382/ps.2012-02413] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Our previous study suggested that green light promotes broiler growth during the early stage [posthatching day (P) 0 to P26], and blue light enhances growth during the later stage (P27 to P49). The purpose of this study was to improve broiler growth and productive performance by using a combination of monochromatic lights at critical points between the early and later stages of growth. A total of 512 male Arbor Acres broilers on P0 were reared under white light (W), red light (R), green light (G), and blue light (B) by using light-emitting diode lamps at 15 ± 0.2 lx from P0 to P26 (16 replicate pens/group, 8 birds/pen), and then switching to another color of light until P49 (4 replicate pens/group, 8 birds/pen). As compared with single monochromatic lights, broilers reared in environments under combinations of monochromatic lights, W→G, R→B, G→B, and B→G, attained heavier BW than those reared in environments under W→W (3.18 to 12.00%), R→R (1.96 to 18.14%), G→G (0.85 to 5.08%), and B→B (0.39 to 4.70%), respectively. In addition, feed conversion ratios in the W→B, R→B, and G→B combinations were lower than feed conversion ratios for W→W (15.86%, P < 0.05), R→R (18.41%, P < 0.05), and G→G (3.37%), respectively. Moreover, the eviscerated carcass weight and breast, thigh, and crus muscle weights under G→B were greater by 0.40 to 56.23% than were those for the other light groups except W→B (eviscerated carcass) and B→G (breast muscle). The results suggest that the application of the G→B and B→G exchanges can be used successfully to improve growth and productive performance in broilers.
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Affiliation(s)
- J Cao
- Laboratory of Anatomy of Domestic Animal, College of Animal Medicine, China Agricultural University, Haidian, Beijing 100193, China
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