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Ma H, Yao S, Bai L, Bai S, Liu G. The effects of rumen-protected tryptophan (RPT) on production performance and relevant hormones of dairy cows. PeerJ 2022; 10:e13831. [PMID: 36117532 PMCID: PMC9480067 DOI: 10.7717/peerj.13831] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 07/11/2022] [Indexed: 01/18/2023] Open
Abstract
Tryptophan is an essential amino acid that cannot be synthesized in mammals. Therefore, the dietary supply of tryptophan is critical for the health and production performance (e.g., milk) of mammals. In the present study, 36 lactating Holstein cows were used, of which 24 cows were in the rumen-protected tryptophan (RPT) feeding groups with different doses at 14 g/d and 28 g/d, respectively and 12 cows were in the control group. This approach could avoid dietary tryptophan being degraded by the rumen microorganisms and improve its bioavailability for cows. The results showed that RPT increased milk protein percentage, milk protein yield, milk solid non-fat (SNF), and milk yield. In response to RPT treatment, the levels of melatonin (MT), prolactin (PRL), and insulin-like growth factor-1 (IGF-1) were significantly increased in the serum of cows compared to the controls. RPT feeding improved nutrient utilization efficiency and lactation performance of dairy cows, which enhanced the quality of milk.
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Affiliation(s)
- Hui Ma
- Beijing Sanyuan Breeding Technology Co., Ltd., Beijing, China
| | - Songyang Yao
- Beijing Key Laboratory of Animal Genetic Improvement, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Libing Bai
- Beijing Sunlon Livestock Development Co. Ltd., Beijing, China
| | - Sarvvl Bai
- Beijing Sunlon Livestock Development Co. Ltd., Beijing, China
| | - Guoshi Liu
- Beijing Key Laboratory of Animal Genetic Improvement, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Salucci S, Burattini S, Battistelli M, Baldassarri V, Curzi D, Valmori A, Falcieri E. Melatonin prevents chemical-induced haemopoietic cell death. Int J Mol Sci 2014; 15:6625-40. [PMID: 24747596 PMCID: PMC4013651 DOI: 10.3390/ijms15046625] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 04/09/2014] [Accepted: 04/09/2014] [Indexed: 12/12/2022] Open
Abstract
Melatonin (MEL), a methoxyindole synthesized by the pineal gland, is a powerful antioxidant in tissues as well as within cells, with a fundamental role in ameliorating homeostasis in a number of specific pathologies. It acts both as a direct radical scavenger and by stimulating production/activity of intracellular antioxidant enzymes. In this work, some chemical triggers, with different mechanisms of action, have been chosen to induce cell death in U937 hematopoietic cell line. Cells were pre-treated with 100 µM MEL and then exposed to hydrogen peroxide or staurosporine. Morphological analyses, TUNEL reaction and Orange/PI double staining have been used to recognize ultrastructural apoptotic patterns and to evaluate DNA behavior. Chemical damage and potential MEL anti-apoptotic effects were quantified by means of Tali® Image-Based Cytometer, able to monitor cell viability and apoptotic events. After trigger exposure, chromatin condensation, micronuclei formation and DNA fragmentation have been observed, all suggesting apoptotic cell death. These events underwent a statistically significant decrease in samples pre-treated with MEL. After caspase inhibition and subsequent assessment of cell viability, we demonstrated that apoptosis occurs, at least in part, through the mitochondrial pathway and that MEL interacts at this level to rescue U937 cells from death.
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Affiliation(s)
- Sara Salucci
- DiSTeVA, University of Urbino Carlo Bo, Urbino 61029, Italy.
| | | | | | | | - Davide Curzi
- DiSTeVA, University of Urbino Carlo Bo, Urbino 61029, Italy.
| | - Aurelio Valmori
- IGM, CNR, Rizzoli Orthopaedic Institute, Bologna 40136, Italy.
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Calvo JR, González-Yanes C, Maldonado MD. The role of melatonin in the cells of the innate immunity: a review. J Pineal Res 2013; 55:103-20. [PMID: 23889107 DOI: 10.1111/jpi.12075] [Citation(s) in RCA: 297] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 07/03/2013] [Indexed: 02/06/2023]
Abstract
Melatonin is the major secretory product synthesized and secreted by the pineal gland and shows both a wide distribution within phylogenetically distant organisms from bacteria to humans and a great functional versatility. In recent years, a considerable amount of experimental evidence has accumulated showing a relationship between the nervous, endocrine, and immune systems. The molecular basis of the communication between these systems is the use of a common chemical language. In this framework, currently melatonin is considered one of the members of the neuroendocrine-immunological network. A number of in vivo and in vitro studies have documented that melatonin plays a fundamental role in neuroimmunomodulation. Based on the information published, it is clear that the majority of the present data in the literature relate to lymphocytes; thus, they have been rather thoroughly investigated, and several reviews have been published related to the mechanisms of action and the effects of melatonin on lymphocytes. However, few studies concerning the effects of melatonin on cells belonging to the innate immunity have been reported. Innate immunity provides the early line of defense against microbes and consists of both cellular and biochemical mechanisms. In this review, we have focused on the role of melatonin in the innate immunity. More specifically, we summarize the effects and action mechanisms of melatonin in the different cells that belong to or participate in the innate immunity, such as monocytes-macrophages, dendritic cells, neutrophils, eosinophils, basophils, mast cells, and natural killer cells.
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Affiliation(s)
- Juan R Calvo
- Department Medical Biochemistry, Molecular Biology and Immunology, University of Seville Medical School, Seville, Spain.
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Bitzer-Quintero OK, Dávalos-Marín AJ, Ortiz GG, Meza ARDA, Torres-Mendoza BM, Robles RG, Huerta VC, Beas-Zárate C. Antioxidant activity of tryptophan in rats under experimental endotoxic shock. Biomed Pharmacother 2010; 64:77-81. [DOI: 10.1016/j.biopha.2009.07.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Accepted: 07/02/2009] [Indexed: 11/29/2022] Open
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Radogna F, Sestili P, Martinelli C, Paolillo M, Paternoster L, Albertini M, Accorsi A, Gualandi G, Ghibelli L. Lipoxygenase-mediated pro-radical effect of melatonin via stimulation of arachidonic acid metabolism. Toxicol Appl Pharmacol 2009; 238:170-7. [DOI: 10.1016/j.taap.2009.05.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2008] [Revised: 04/21/2009] [Accepted: 05/12/2009] [Indexed: 12/15/2022]
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Piccione G, Giannetto C, Assenza A, Fazio F, Caola G. Locomotor activity and serum tryptophan and serotonin in goats: daily rhythm. J Appl Biomed 2008. [DOI: 10.32725/jab.2008.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Sánchez S, Sánchez CL, Paredes SD, Rodriguez AB, Barriga C. The effect of tryptophan administration on the circadian rhythms of melatonin in plasma and the pineal gland of rats. J Appl Biomed 2008. [DOI: 10.32725/jab.2008.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Radogna F, Cristofanon S, Paternoster L, D'Alessio M, De Nicola M, Cerella C, Dicato M, Diederich M, Ghibelli L. Melatonin antagonizes the intrinsic pathway of apoptosis via mitochondrial targeting of Bcl-2. J Pineal Res 2008; 44:316-25. [PMID: 18339127 DOI: 10.1111/j.1600-079x.2007.00532.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have recently shown that melatonin antagonizes damage-induced apoptosis by interaction with the MT-1/MT-2 plasma membrane receptors. Here, we show that melatonin interferes with the intrinsic pathway of apoptosis at the mitochondrial level. In response to an apoptogenic stimulus, melatonin allows mitochondrial translocation of the pro-apoptotic protein Bax, but it impairs its activation/dimerization The downstream apoptotic events, i.e. cytochrome c release, caspase 9 and 3 activation and nuclear vesiculation are equally impaired, indicating that melatonin interferes with Bax activation within mitochondria. Interestingly, we found that melatonin induces a strong re-localization of Bcl-2, the main Bax antagonist to mitochondria, suggesting that Bax activation may in fact be antagonized by Bcl-2 at the mitochondrial level. Indeed, we inhibit the melatonin anti-apoptotic effect (i) by silencing Bcl-2 with small interfering RNAs, or with small-molecular inhibitors targeted at the BH3 binding pocket in Bcl-2 (i.e. the one interacting with Bax); and (ii) by inhibiting melatonin-induced Bcl-2 mitochondrial re-localization with the MT1/MT2 receptor antagonist luzindole. This evidence provides a mechanism that may explain how melatonin through interaction with the MT1/MT2 receptors, elicits a pathway that interferes with the Bcl-2 family, thus modulating the cell life/death balance.
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Affiliation(s)
- Flavia Radogna
- Dipartimento di Biologia, Università di Roma Tor Vergata, Rome, Italy
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Cubero J, Valero V, Narciso D, Sánchez J, Rodríguez A, Barriga C. Application of the oral administration of the amino acid L-tryptophan as a possible antioxidant precursor. ACTA ALIMENTARIA 2007. [DOI: 10.1556/aalim.36.2007.4.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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