Plasma Melatonin Levels in Relation to the Light-Dark Cycle and Parental Background in Domestic Pigs

Andersson, H

doi:10.1186/1751-0147-42-287

Cited by 17 publications

(7 citation statements)

References 35 publications

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“…To the best of our knowledge, this study is the first one focused on evaluating biological profile and functional roles of SP MLT in livestock sires, particularly boars, used in commercial AI programs. The average SP MLT concentrations found in the present study were like those recently found by González-Arto et al (2016b) and close to those previously observed by Andersson (2001) in blood plasma samples collected from adult boars during daylight hours. The first noteworthy finding was the significant variability in the concentration of MLT among SP samples, which agrees with previous results achieved by González-Arto et al (2016b) in SP samples of different livestock males.…”

Section: Discussionsupporting

confidence: 93%

Profile and reproductive roles of seminal plasma melatonin of boar ejaculates used in artificial insemination programs

Barranco¹,

Casao²,

Pérez-Patiño³

et al. 2017

Journal of Animal Science

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Melatonin (MLT) is present in seminal plasma (SP) of mammalian species, including pigs, and it is credited with antioxidant properties. This study aims to identify the sources of variation and the role of boar SP MLT on sperm quality and functionality and in vivo fertilizing ability of liquid-stored semen doses used in AI programs. The SP MLT was measured using an ELISA kit in a total of 219 ejaculates collected from 76 boars, and reproductive records of 5,318 AI sows were recorded. Sperm quality was assessed according to motility (computer-aided sperm analysis) and viability (cytometry evaluation). Sperm functionality was assessed according to the cytometric determination of intracellular HO generation, total and mitochondrial O production, and lipid peroxidation in liquid AI semen samples stored at 17°C over 144 h. The concentration of SP MLT differed among seasons ( < 0.01) and day length periods ( < 0.001) of the year, demonstrating that the ejaculates collected during the increasing day length period (9.80 ± 1.38 pg/mL, range: 2.75-21.94) had lower SP MLT concentrations than those collected during the decreasing day length period (16.32 ± 1.67 pg/mL, range: 5.02-35.61). The SP MLT also differed ( < 0.001) among boars, among ejaculates within boar, and among portions within the ejaculate, demonstrating that SP from the first 10 mL of sperm-rich ejaculate fraction (SRF) exhibited lower MLT concentrations than post-SRF. The SP MLT was negatively related ( < 0.001) to mitochondrial O production in viable sperm. The SP MLT did not differ among AI boars ( = 14) hierarchically grouped according to high and low fertility outcomes. In conclusion, SP MLT concentration in AI boars varies depending on the season of ejaculate collection and differs among boars, ejaculates within boar, and portions within ejaculate. The SP MLT may act at the mitochondrial level of sperm by reducing the generation of O. However, this antioxidant role of SP MLT was not reflected in sperm quality or in vivo fertility outcomes of AI semen doses.

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Section: Discussionsupporting

confidence: 93%

Profile and reproductive roles of seminal plasma melatonin of boar ejaculates used in artificial insemination programs

Barranco¹,

Casao²,

Pérez-Patiño³

et al. 2017

Journal of Animal Science

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“…The effects of lighting conditions on endocrine hormones, and on melatonin are well‐known. Circulating levels of melatonin are higher at night compared to levels during the day, which is also applicable for pigs (Andersson, 2001). Oral administration of melatonin to rats for 9 weeks reduced insulin levels (Peschke, 2010; Ríos‐Lugo et al., 2010).…”

Section: Discussionmentioning

confidence: 99%

Effects of dietary lysine levels and lighting conditions on intramuscular fat accumulation in growing pigs

Katsumata

Kobayashi

Ashihara

et al. 2018

Animal Science Journal

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This study was conducted to test our hypothesis that intramuscular fat (IMF) accumulation increases in pigs fed on a low lysine diet during the dark period than those fed on the same diet during the light period. Using barrows aged 6 weeks, we monitored whether serum glucose and insulin levels were affected by light conditions. Two diets with different levels of lysine, 0.78% (LL diet) and 1.37% (control diet) were prepared. Eight pigs were fed on the diet during the light period, while the remaining pigs were fed during the dark period. The pigs were fed either the LL diet or the control diet. Although IMF contents of Longissimus dorsi (LD) muscle were higher in the pigs fed on a LL diet (p < .05), the light conditions had no effect. Low dietary lysine caused reduction in serum glucose levels (p < .05) and serum insulin levels (p = .0613). However, they were also unaffected by the lighting conditions. To gain further insights, we determined the messenger RNA levels of insulin receptor, insulin receptor substrate 1, acetyl CoA carboxylase, and fatty acid synthase in LD and Rhomboideus muscles and in the liver.

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“…The resulting lesions range from impaired horn production, with diffuse softening and discolouration in the horn of the sole [2] . The pathogenesis of "Rusterholz" ulcer is the circulatory disturbance in the corium due to primary damage and degeneration of the cells in the epidermis [3] . Localized contusion of the corium as a result of overloading and heel horn erosion is also considered to be a contributory factor in the development of sole ulcers in cattle.…”

Section: Introductionmentioning

confidence: 99%

Wound Healing Process of Uncomplicated "Rusterholz" Ulcer, Following Treatment by Wooden Block and Hoofgel® in Bovine Hoof: Histopathological Aspects

Azarabad¹,

Nowrouzian²,

Soleymani³

et al. 2006

American J. of Animal and Veterinary Sciences

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A broad and very detailed histopathological knowledge on cutaneous wound healing particularly in human skin is available, but few studies have documented this event in bovine claw sole ulcers. It seems the mechanism of wound healing might be basically the same followed by second intention healing which is finished in a period of time by formation of granulation tissue in damaged corium and subsequently completed by keratinized epidermis.This study was aimed for more histopathological information when wooden block and solka Hoofgel are applied as a treatment device for uncomplicated sole ulcers. Sixteen milking cows (age 2-5 years) which suffering from uncomplicated sole ulcer, following treatment by claw block (wooden block) on the healthy claw to reduce weight bearing on the affected claw and topical solka gel on affected claw from a farm in the vicinity of Tehran were considered. In all cases Lameness score was 3 (1-3 are ordinal scale), Lesion score was assessed 4 (1-4 are ordinal scale) and the mean lesion size was 16× 9 mm. Regardless of the location's of the sole ulcers, The sampling sites were settled at caudo-medial part in the center sole namely "Specific ulcer site". 16 safe ulcers in lateral claw of left rear foot, contained the corium and the part of the epidermis were collected in three time intervals 1,10,21 days and examined histopathologically. These samples were fixed in 10% buffered formalin and embedded in paraffin. Sections (3-5 µm thick) were taken from the paraffin-embedded tissue and stained with Hematoxylin and Eosin. Inflammatory changes were evident on day 1 because of disruption of the superficial dermis vessels. Some areas and horn layer surrounding the ulcer shows dilated tubules which were parallel to the sole and microcracks extending to the stratum spinosum. In day 10,the progressive epidermal regeneration from the edges of the lesion and reattachment between the over growing epidermis and the base membrane were seen. The proliferation in connective tissue was accompanied by the formation of new dermal vessels. The vascularization in the dermis was completed on day 21. The lesion was covered by moderate differentiated cornified epidermis. The dermal papillae showed marked mononuclear cells infiltrate. From these histopathological changes which is occurred during these stages of healing, it seems that by applying wooden block to the healthy claw to reduce weight bearing on the affected claw and using Solka hoofgel® which is a product, has some ingredient such as zinc and some organic acid, the time of wound healing process was decreased. So use of a modified treatment, influence on the healing process in macroscopical and histopathological aspect.

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Plasma Melatonin Levels in Relation to the Light-Dark Cycle and Parental Background in Domestic Pigs

Cited by 17 publications

References 35 publications

Profile and reproductive roles of seminal plasma melatonin of boar ejaculates used in artificial insemination programs

Profile and reproductive roles of seminal plasma melatonin of boar ejaculates used in artificial insemination programs

Effects of dietary lysine levels and lighting conditions on intramuscular fat accumulation in growing pigs

Wound Healing Process of Uncomplicated "Rusterholz" Ulcer, Following Treatment by Wooden Block and Hoofgel® in Bovine Hoof: Histopathological Aspects

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