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Cadaret CN, Posont RJ, Swanson RM, Beard JK, Gibbs RL, Barnes TL, Marks-Nelson ES, Petersen JL, Yates DT. Intermittent maternofetal oxygenation during late gestation improved birthweight, neonatal growth, body symmetry, and muscle metabolism in intrauterine growth-restricted lambs. J Anim Sci 2022; 100:6453369. [PMID: 34865027 DOI: 10.1093/jas/skab358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/30/2021] [Indexed: 02/05/2023] Open
Abstract
In humans and animals, intrauterine growth restriction (IUGR) results from fetal programming responses to poor intrauterine conditions. Chronic fetal hypoxemia elevates circulating catecholamines, which reduces skeletal muscle β2 adrenoceptor content and contributes to growth and metabolic pathologies in IUGR-born offspring. Our objective was to determine whether intermittent maternofetal oxygenation during late gestation would improve neonatal growth and glucose metabolism in IUGR-born lambs. Pregnant ewes were housed at 40 °C from the 40th to 95th day of gestational age (dGA) to produce IUGR-born lambs (n = 9). A second group of IUGR-born lambs received prenatal O2 supplementation via maternal O2 insufflation (100% humidified O2, 10 L/min) for 8 h/d from dGA 130 to parturition (IUGR+O2, n = 10). Control lambs (n = 15) were from pair-fed thermoneutral ewes. All lambs were weaned at birth, hand-reared, and fitted with hindlimb catheters at day 25. Glucose-stimulated insulin secretion (GSIS) and hindlimb hyperinsulinemic-euglycemic clamp (HEC) studies were performed at days 28 and 29, respectively. At day 30, lambs were euthanized and ex vivo HEC studies were performed on isolated muscle. Without maternofetal oxygenation, IUGR lambs were 40% lighter (P < 0.05) at birth and maintained slower (P < 0.05) growth rates throughout the neonatal period compared with controls. At 30 d of age, IUGR lambs had lighter (P < 0.05) hindlimbs and flexor digitorum superficialis (FDS) muscles. IUGR+O2 lambs exhibited improved (P < 0.05) birthweight, neonatal growth, hindlimb mass, and FDS mass compared with IUGR lambs. Hindlimb insulin-stimulated glucose utilization and oxidation rates were reduced (P < 0.05) in IUGR but not IUGR+O2 lambs. Ex vivo glucose oxidation rates were less (P < 0.05) in muscle from IUGR but not IUGR+O2 lambs. Surprisingly, β2 adrenoceptor content and insulin responsiveness were reduced (P < 0.05) in muscle from IUGR and IUGR+O2 lambs compared with controls. In addition, GSIS was reduced (P < 0.05) in IUGR lambs and only modestly improved (P < 0.05) in IUGR+O2. Insufflation of O2 also increased (P < 0.05) acidosis and hypercapnia in dams, perhaps due to the use of 100% O2 rather than a gas mixture with a lesser O2 percentage. Nevertheless, these findings show that intermittent maternofetal oxygenation during late gestation improved postnatal growth and metabolic outcomes in IUGR lambs without improving muscle β2 adrenoceptor content.
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Affiliation(s)
- Caitlin N Cadaret
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - Robert J Posont
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - Rebecca M Swanson
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - Joslyn K Beard
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - Rachel L Gibbs
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - Taylor L Barnes
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583
| | | | - Jessica L Petersen
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583
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2
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Inflammatory Mediation of Heat Stress-Induced Growth Deficits in Livestock and Its Potential Role as a Target for Nutritional Interventions: A Review. Animals (Basel) 2021; 11:ani11123539. [PMID: 34944316 PMCID: PMC8698153 DOI: 10.3390/ani11123539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 12/06/2021] [Accepted: 12/10/2021] [Indexed: 12/05/2022] Open
Abstract
Simple Summary Heat stress is a persistent challenge for livestock producers. Molecular changes throughout the body that result from sustained heat stress slow muscle growth and thus are detrimental to carcass yield and value. Feedlot animals are at particularly high risk for heat stress because their confinement limits their ability to pursue shade and other natural cooling behaviors. Changes in infrastructure to reduce the impact of heat stress are often cost-prohibitive, but recent studies have revealed that anti-inflammatory therapies may help to improve growth deficits in heat-stressed animals. This review describes the conditions that cause heat stress and explains the role of inflammation in muscle growth impairment. Additionally, it discusses the potential for several natural anti-inflammatory dietary additives to improve muscle growth outcomes in heat-stressed livestock. Abstract Heat stress is detrimental to well-being and growth performance in livestock, and systemic inflammation arising during chronic heat stress contributes to these poor outcomes. Sustained exposure of muscle and other tissues to inflammation can impair the cellular processes that facilitate muscle growth and intramuscular fat deposition, thus reducing carcass quality and yield. Climate change is expected to produce more frequent extreme heat events, increasing the potential impact of heat stress on sustainable livestock production. Feedlot animals are at particularly high risk for heat stress, as confinement limits their ability to seek cooling from the shade, water, or breeze. Economically practical options to circumvent heat stress in feedlot animals are limited, but understanding the mechanistic role of inflammation in heat stress outcomes may provide the basis for treatment strategies to improve well-being and performance. Feedlot animals receive formulated diets daily, which provides an opportunity to administer oral nutraceuticals and other bioactive products to mitigate heat stress-induced inflammation. In this review, we examine the complex associations between heat stress, systemic inflammation, and dysregulated muscle growth in meat animals. We also present evidence for potential nutraceutical and dietary moderators of inflammation and how they might improve the unique pathophysiology of heat stress.
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Gibbs RL, Yates DT. The Price of Surviving on Adrenaline: Developmental Programming Responses to Chronic Fetal Hypercatecholaminemia Contribute to Poor Muscle Growth Capacity and Metabolic Dysfunction in IUGR-Born Offspring. FRONTIERS IN ANIMAL SCIENCE 2021; 2:769334. [PMID: 34966907 PMCID: PMC8713512 DOI: 10.3389/fanim.2021.769334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Maternofetal stress induces fetal programming that restricts skeletal muscle growth capacity and metabolic function, resulting in intrauterine growth restriction (IUGR) of the fetus. This thrifty phenotype aids fetal survival but also yields reduced muscle mass and metabolic dysfunction after birth. Consequently, IUGR-born individuals are at greater lifelong risk for metabolic disorders that reduce quality of life. In livestock, IUGR-born animals exhibit poor growth efficiency and body composition, making these animals more costly and less valuable. Specifically, IUGR-associated programming causes a greater propensity for fat deposition and a reduced capacity for muscle accretion. This, combined with metabolic inefficiency, means that these animals produce less lean meat from greater feed input, require more time on feed to reach market weight, and produce carcasses that are of less quality. Despite the health and economic implications of IUGR pathologies in humans and food animals, knowledge regarding their specific underlying mechanisms is lacking. However, recent data indicate that adaptive programing of adrenergic sensitivity in multiple tissues is a contributing factor in a number of IUGR pathologies including reduced muscle mass, peripheral insulin resistance, and impaired glucose metabolism. This review highlights the findings that support the role for adrenergic programming and how it relates to the lifelong consequences of IUGR, as well as how dysfunctional adrenergic signaling pathways might be effective targets for improving outcomes in IUGR-born offspring.
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Affiliation(s)
- Rachel L. Gibbs
- Stress Physiology Laboratory, Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Dustin T. Yates
- Stress Physiology Laboratory, Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, United States
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4
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Most MS, Grijalva PC, Beer HN, Gibbs RL, Hicks ZM, Lacey TA, Schmidt TB, Petersen JL, Yates DT. Dexamethasone and fish oil improve average daily gain but not muscle mass or protein content in feedlot wethers after chronic heat stress. Transl Anim Sci 2021. [DOI: 10.1093/tas/txab163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Affiliation(s)
- Micah S Most
- Department of Animal Science, University of Nebraska – Lincoln, NE 68583, USA
| | - Pablo C Grijalva
- Department of Animal Science, University of Nebraska – Lincoln, NE 68583, USA
| | - Haley N Beer
- Department of Animal Science, University of Nebraska – Lincoln, NE 68583, USA
| | - Rachel L Gibbs
- Department of Animal Science, University of Nebraska – Lincoln, NE 68583, USA
| | - Zena M Hicks
- Department of Animal Science, University of Nebraska – Lincoln, NE 68583, USA
| | - Taylor A Lacey
- Department of Animal Science, University of Nebraska – Lincoln, NE 68583, USA
| | - Ty B Schmidt
- Department of Animal Science, University of Nebraska – Lincoln, NE 68583, USA
| | - Jessica L Petersen
- Department of Animal Science, University of Nebraska – Lincoln, NE 68583, USA
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska – Lincoln, NE 68583, USA
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5
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Beer HN, Lacey TA, Gibbs RL, Most MS, Hicks ZM, Grijalva PC, Petersen JL, Yates DT. Placental insufficiency improves when intrauterine growth-restricted fetal sheep are administered daily ω-3 polyunsaturated fatty acid infusions. Transl Anim Sci 2021. [DOI: 10.1093/tas/txab166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Haley N Beer
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Taylor A Lacey
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Rachel L Gibbs
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Micah S Most
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Zena M Hicks
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Pablo C Grijalva
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Jessica L Petersen
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
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6
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Grijalva PC, Most MS, Gibbs RL, Hicks ZM, Lacey TA, Beer HN, Schmidt TB, Petersen JL, Yates DT. Fish oil and dexamethasone administration partially mitigates heat stress-induced changes in circulating leukocytes and metabolic indicators in feedlot wethers. Transl Anim Sci 2021. [DOI: 10.1093/tas/txab167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Pablo C Grijalva
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Micah S Most
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Rachel L Gibbs
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Zena M Hicks
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Taylor A Lacey
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Haley N Beer
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Ty B Schmidt
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Jessica L Petersen
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska–Lincoln, NE 68583, USA
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7
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Hicks ZM, Yates DT. Going Up Inflame: Reviewing the Underexplored Role of Inflammatory Programming in Stress-Induced Intrauterine Growth Restricted Livestock. FRONTIERS IN ANIMAL SCIENCE 2021; 2. [PMID: 34825243 PMCID: PMC8612632 DOI: 10.3389/fanim.2021.761421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The impact of intrauterine growth restriction (IUGR) on health in humans is well-recognized. It is the second leading cause of perinatal mortality worldwide, and it is associated with deficits in metabolism and muscle growth that increase lifelong risk for hypertension, obesity, hyperlipidemia, and type 2 diabetes. Comparatively, the barrier that IUGR imposes on livestock production is less recognized by the industry. Meat animals born with low birthweight due to IUGR are beset with greater early death loss, inefficient growth, and reduced carcass merit. These animals exhibit poor feed-to-gain ratios, less lean mass, and greater fat deposition, which increase production costs and decrease value. Ultimately, this reduces the amount of meat produced by each animal and threatens the economic sustainability of livestock industries. Intrauterine growth restriction is most commonly the result of fetal programming responses to placental insufficiency, but the exact mechanisms by which this occurs are not well-understood. In uncompromised pregnancies, inflammatory cytokines are produced at modest rates by placental and fetal tissues and play an important role in fetal development. However, unfavorable intrauterine conditions can cause cytokine activity to be excessive during critical windows of fetal development. Our recent evidence indicates that this impacts developmental programming of muscle growth and metabolism and contributes to the IUGR phenotype. In this review, we outline the role of inflammatory cytokine activity in the development of normal and IUGR phenotypes. We also highlight the contributions of sheep and other animal models in identifying mechanisms for IUGR pathologies.
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Affiliation(s)
- Zena M Hicks
- Stress Physiology Laboratory, Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, United States
| | - Dustin T Yates
- Stress Physiology Laboratory, Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE, United States
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8
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Bhagirath AY, Medapati MR, de Jesus VC, Yadav S, Hinton M, Dakshinamurti S, Atukorallaya D. Role of Maternal Infections and Inflammatory Responses on Craniofacial Development. FRONTIERS IN ORAL HEALTH 2021; 2:735634. [PMID: 35048051 PMCID: PMC8757860 DOI: 10.3389/froh.2021.735634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 08/10/2021] [Indexed: 12/12/2022] Open
Abstract
Pregnancy is a tightly regulated immunological state. Mild environmental perturbations can affect the developing fetus significantly. Infections can elicit severe immunological cascades in the mother's body as well as the developing fetus. Maternal infections and resulting inflammatory responses can mediate epigenetic changes in the fetal genome, depending on the developmental stage. The craniofacial development begins at the early stages of embryogenesis. In this review, we will discuss the immunology of pregnancy and its responsive mechanisms on maternal infections. Further, we will also discuss the epigenetic effects of pathogens, their metabolites and resulting inflammatory responses on the fetus with a special focus on craniofacial development. Understanding the pathophysiological mechanisms of infections and dysregulated inflammatory responses during prenatal development could provide better insights into the origins of craniofacial birth defects.
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Affiliation(s)
- Anjali Y. Bhagirath
- Department of Pediatrics and Physiology, University of Manitoba, Winnipeg, MB, Canada
- Biology of Breathing, Children's Hospital Research Institute of Manitoba (CHRIM), Winnipeg, MB, Canada
- Department of Oral Biology, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, MB, Canada
| | - Manoj Reddy Medapati
- Biology of Breathing, Children's Hospital Research Institute of Manitoba (CHRIM), Winnipeg, MB, Canada
- Department of Oral Biology, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, MB, Canada
| | - Vivianne Cruz de Jesus
- Biology of Breathing, Children's Hospital Research Institute of Manitoba (CHRIM), Winnipeg, MB, Canada
- Department of Oral Biology, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, MB, Canada
| | - Sneha Yadav
- Mahatma Gandhi Institute of Medical Sciences, Wardha, India
| | - Martha Hinton
- Department of Pediatrics and Physiology, University of Manitoba, Winnipeg, MB, Canada
- Biology of Breathing, Children's Hospital Research Institute of Manitoba (CHRIM), Winnipeg, MB, Canada
| | - Shyamala Dakshinamurti
- Department of Pediatrics and Physiology, University of Manitoba, Winnipeg, MB, Canada
- Biology of Breathing, Children's Hospital Research Institute of Manitoba (CHRIM), Winnipeg, MB, Canada
| | - Devi Atukorallaya
- Biology of Breathing, Children's Hospital Research Institute of Manitoba (CHRIM), Winnipeg, MB, Canada
- Department of Oral Biology, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, MB, Canada
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9
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Posont RJ, Cadaret CN, Beard JK, Swanson RM, Gibbs RL, Marks-Nelson ES, Petersen JL, Yates DT. Maternofetal inflammation induced for 2 wk in late gestation reduced birth weight and impaired neonatal growth and skeletal muscle glucose metabolism in lambs. J Anim Sci 2021; 99:6199898. [PMID: 33780540 DOI: 10.1093/jas/skab102] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 03/24/2021] [Indexed: 12/22/2022] Open
Abstract
Intrauterine stress impairs growth and metabolism in the fetus and offspring. We recently found that sustained maternofetal inflammation resulted in intrauterine growth-restricted (MI-IUGR) fetuses with asymmetric body composition, impaired muscle glucose metabolism, and β-cell dysfunction near term. These fetuses also exhibited heightened inflammatory tone, which we postulated was a fetal programming mechanism for the IUGR phenotype. Thus, the objective of this study was to determine whether poor growth and metabolism persisted in MI-IUGR lambs after birth. Polypay ewes received serial lipopolysaccharide or saline injections in the first 2 wk of the third trimester of pregnancy to produce MI-IUGR (n = 13) and control (n = 12) lambs, respectively. Lambs were catheterized at 25 d of age. β-Cell function was assessed at 29 d, hindlimb glucose metabolism at 30 d, and daily blood parameters from day 26 to 31. Glucose metabolism was also assessed in flexor digitorum superficialis (FDS) muscle isolated at necropsy on day 31. Asymmetric body composition persisted in MI-IUGR neonates, as these lambs were lighter (P < 0.05) than controls at birth and 31 d, but body and cannon bone lengths did not differ at either age. FDS muscles from MI-IUGR lambs were smaller (P < 0.05) and exhibited reduced (P < 0.05) glucose oxidation and Akt phosphorylation but similar glucose uptake compared with controls when incubated in basal or insulin-spiked media. Similarly, hindlimb glucose oxidation was reduced (P < 0.05) in MI-IUGR lambs under basal and hyperinsulinemic conditions, but hindlimb glucose utilization did not differ from controls. Circulating urea nitrogen and cholesterol were reduced (P < 0.05), and triglycerides, high-density lipoprotein cholesterol, and glucose-to-insulin ratios were increased (P < 0.05) in MI-IUGR lambs. Glucose and insulin concentrations did not differ between groups during basal or hyperglycemic conditions. Although circulating monocyte and granulocyte concentrations were greater (P < 0.05) in MI-IUGR lambs, plasma tumor necrosis factor α (TNFα) was reduced (P < 0.05). FDS muscle contained greater (P < 0.05) TNF receptor 1 (TNFR1) and IκBα protein content. These findings indicate that maternofetal inflammation in late pregnancy results in fetal programming that impairs growth capacity, muscle glucose oxidation, and lipid homeostasis in offspring. Inflammatory indicators measured in this study appear to reflect heightened cytokine sensitivity in muscle and compensatory systemic responses to it.
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Affiliation(s)
- Robert J Posont
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Caitlin N Cadaret
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Joslyn K Beard
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Rebecca M Swanson
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Rachel L Gibbs
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Eileen S Marks-Nelson
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Jessica L Petersen
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
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10
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Gibbs RL, Swanson RM, Beard JK, Schmidt TB, Petersen JL, Yates DT. Deficits in growth, muscle mass, and body composition following placental insufficiency-induced intrauterine growth restriction persisted in lambs at 60 d of age but were improved by daily clenbuterol supplementation. Transl Anim Sci 2020; 4:S53-S57. [PMID: 33381721 PMCID: PMC7754231 DOI: 10.1093/tas/txaa097] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/25/2020] [Indexed: 12/20/2022] Open
Affiliation(s)
- Rachel L Gibbs
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Rebecca M Swanson
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Joslyn K Beard
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Ty B Schmidt
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Jessica L Petersen
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
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11
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Swanson RM, Gibbs RL, Cadaret CN, Erickson GE, Schmidt TB, Cupp AS, Yates DT. Beef cows with atypical estrous cyclicity at puberty produced calves with deficits in preweaning muscling, metabolic indicators, and myoblast function but not in feedlot performance1. Transl Anim Sci 2020; 4:S127-S131. [PMID: 33381735 PMCID: PMC7754216 DOI: 10.1093/tas/txaa119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 07/09/2020] [Indexed: 11/23/2022] Open
Affiliation(s)
| | - Rachel L Gibbs
- Department of Animal Science, University of Nebraska-Lincoln, NE
| | | | - Galen E Erickson
- Department of Animal Science, University of Nebraska-Lincoln, NE
| | - Ty B Schmidt
- Department of Animal Science, University of Nebraska-Lincoln, NE
| | - Andrea S Cupp
- Department of Animal Science, University of Nebraska-Lincoln, NE
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska-Lincoln, NE
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12
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Swanson RM, Tait RG, Galles BM, Duffy EM, Schmidt TB, Petersen JL, Yates DT. Heat stress-induced deficits in growth, metabolic efficiency, and cardiovascular function coincided with chronic systemic inflammation and hypercatecholaminemia in ractopamine-supplemented feedlot lambs. J Anim Sci 2020; 98:5840746. [PMID: 32428228 DOI: 10.1093/jas/skaa168] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 05/13/2020] [Indexed: 01/03/2023] Open
Abstract
Heat stress hinders growth and well-being in livestock, an effect that is perhaps exacerbated by the β1 agonist ractopamine. Heat stress deficits are mediated in part by reduced feed intake, but other mechanisms involved are less understood. Our objective was to determine the direct impact of heat stress on growth and well-being in ractopamine-supplemented feedlot lambs. Commercial wethers were fed under heat stress (40 °C) for 30 d, and controls (18 °C) were pair-fed. In a 2 × 2 factorial, lambs were also given a daily gavage of 0 or 60 mg ractopamine. Growth, metabolic, cardiovascular, and stress indicators were assessed throughout the study. At necropsy, 9th to 12th rib sections (four-rib), internal organs, and feet were assessed, and sartorius muscles were collected for ex vivo glucose metabolic studies. Heat stress increased (P < 0.05) rectal temperatures and respiration rates throughout the study and reduced (P < 0.05) weight gain and feed efficiency over the first week, ultrasonic loin-eye area and loin depth near the end of the study, and four-rib weight at necropsy. Fat content of the four-rib and loin were also reduced (P < 0.05) by heat stress. Ractopamine increased (P < 0.05) loin weight and fat content and partially moderated the impact of heat stress on rectal temperature and four-rib weight. Heat stress reduced (P < 0.05) spleen weight, increased (P < 0.05) adrenal and lung weights, and was associated with hoof wall overgrowth but not organ lesions. Ractopamine did not affect any measured indicators of well-being. Heat stress reduced (P < 0.05) blood urea nitrogen and increased (P < 0.05) circulating monocytes, granulocytes, and total white blood cells as well as epinephrine, TNFα, cholesterol, and triglycerides. Cortisol and insulin were not affected. Heat stress reduced (P < 0.05) blood pressure and heart rates in all lambs and increased (P < 0.05) left ventricular wall thickness in unsupplemented but not ractopamine-supplemented lambs. No cardiac arrhythmias were observed. Muscle glucose uptake did not differ among groups, but insulin-stimulated glucose oxidation was reduced (P < 0.05) in muscle from heat-stressed lambs. These findings demonstrate that heat stress impairs growth, metabolism, and well-being even when the impact of feed intake is eliminated by pair-feeding and that systemic inflammation and hypercatecholaminemia likely contribute to these deficits. Moreover, ractopamine improved muscle growth indicators without worsening the effects of heat stress.
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Affiliation(s)
- Rebecca M Swanson
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Richard G Tait
- Bioinformatics and Biostatistics, Neogen GeneSeek, Lincoln, NE
| | - Beth M Galles
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE
| | - Erin M Duffy
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Ty B Schmidt
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Jessica L Petersen
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
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13
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Posont RJ, Cadaret CN, Beede KA, Beard JK, Swanson RM, Gibbs RL, Petersen JL, Yates DT. Maternal inflammation at 0.7 gestation in ewes leads to intrauterine growth restriction and impaired glucose metabolism in offspring at 30 d of age. Transl Anim Sci 2019; 3:1673-1677. [PMID: 31867569 PMCID: PMC6912171 DOI: 10.1093/tas/txz055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 05/07/2019] [Indexed: 01/03/2023] Open
Affiliation(s)
- Robert J Posont
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Caitlin N Cadaret
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Kristin A Beede
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Joslyn K Beard
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Rebecca M Swanson
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Rachel L Gibbs
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Jessica L Petersen
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
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Posont RJ, Yates DT. Postnatal Nutrient Repartitioning due to Adaptive Developmental Programming. Vet Clin North Am Food Anim Pract 2019; 35:277-288. [PMID: 31103181 DOI: 10.1016/j.cvfa.2019.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Fetal stress induces developmental adaptations that result in intrauterine growth restriction (IUGR) and low birthweight. These adaptations reappropriate nutrients to the most essential tissues, which benefits fetal survival. The same adaptations are detrimental to growth efficiency and carcass value in livestock, however, because muscle is disproportionally targeted. IUGR adipocytes, liver tissues, and pancreatic β-cells also exhibit functional adaptations. Identifying mechanisms underlying adaptive changes is fundamental to improving outcomes and value in low birthweight livestock. The article outlines studies that have begun to identify stress-induced fetal adaptations affecting growth, metabolism, and differential nutrient utilization in IUGR-born animals.
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Affiliation(s)
- Robert J Posont
- Department of Animal Science, University of Nebraska-Lincoln, PO Box 830908, Lincoln, NE 68583, USA
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska-Lincoln, PO Box 830908, Lincoln, NE 68583, USA.
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Beede KA, Limesand SW, Petersen JL, Yates DT. Real supermodels wear wool: summarizing the impact of the pregnant sheep as an animal model for adaptive fetal programming. Anim Front 2019; 9:34-43. [PMID: 31608163 PMCID: PMC6777506 DOI: 10.1093/af/vfz018] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Kristin A Beede
- Department of Animal Science, University of Nebraska - Lincoln, Lincoln, NE
| | - Sean W Limesand
- School of Animal and Comparative Biomedical Sciences, The University of Arizona, Tucson, AZ
| | - Jessica L Petersen
- Department of Animal Science, University of Nebraska - Lincoln, Lincoln, NE
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska - Lincoln, Lincoln, NE
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Cadaret CN, Posont RJ, Beede KA, Riley HE, Loy JD, Yates DT. Maternal inflammation at midgestation impairs subsequent fetal myoblast function and skeletal muscle growth in rats, resulting in intrauterine growth restriction at term. Transl Anim Sci 2019; 3:txz037. [PMID: 31032478 PMCID: PMC6476527 DOI: 10.1093/tas/txz037] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 03/29/2019] [Indexed: 11/13/2022] Open
Abstract
Maternal inflammation induces intrauterine growth restriction (MI-IUGR) of the fetus, which compromises metabolic health in human offspring and reduces value in livestock. The objective of this study was to determine the effect of maternal inflammation at midgestation on fetal skeletal muscle growth and myoblast profiles at term. Pregnant Sprague-Dawley rats were injected daily with bacterial endotoxin (MI-IUGR) or saline (controls) from the 9th to the 11th day of gestational age (dGA; term = 21 dGA). At necropsy on dGA 20, average fetal mass and upper hindlimb cross-sectional areas were reduced (P < 0.05) in MI-IUGR fetuses compared with controls. MyoD+ and myf5+ myoblasts were less abundant (P < 0.05), and myogenin+ myoblasts were more abundant (P < 0.05) in MI-IUGR hindlimb skeletal muscle compared with controls, indicating precocious myoblast differentiation. Type I and Type II hindlimb muscle fibers were smaller (P < 0.05) in MI-IUGR fetuses than in controls, but fiber type proportions did not differ between experimental groups. Fetal blood plasma TNFα concentrations were below detectable amounts in both experimental groups, but skeletal muscle gene expression for the cytokine receptors TNFR1, IL6R, and FN14 was greater (P < 0.05) in MI-IUGR fetuses than controls, perhaps indicating enhanced sensitivity to these cytokines. Maternal blood glucose concentrations at term did not differ between experimental groups, but MI-IUGR fetal blood contained less (P < 0.05) glucose, cholesterol, and triglycerides. Fetal-to-maternal blood glucose ratios were also reduced (P < 0.05), which is indicative of placental insufficiency. Indicators of protein catabolism, including blood plasma urea nitrogen and creatine kinase, were greater (P < 0.05) in MI-IUGR fetuses than in controls. From these findings, we conclude that maternal inflammation at midgestation causes muscle-centric fetal programming that impairs myoblast function, increases protein catabolism, and reduces skeletal muscle growth near term. Fetal muscle sensitivity to inflammatory cytokines appeared to be enhanced after maternal inflammation, which may represent a mechanistic target for improving these outcomes in MI-IUGR fetuses.
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Affiliation(s)
- Caitlin N Cadaret
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Robert J Posont
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Kristin A Beede
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - Hannah E Riley
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
| | - John Dustin Loy
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln, NE
| | - Dustin T Yates
- Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE.,Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE
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