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Zhang N, Zhou Z, Huang Y, Wang G, Tang Z, Lu J, Wang C, Ni X. Reduced hydrogen sulfide production contributes to adrenal insufficiency induced by hypoxia via modulation of NLRP3 inflammasome activation. Redox Rep 2023; 28:2163354. [PMID: 36661247 PMCID: PMC9869992 DOI: 10.1080/13510002.2022.2163354] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Objective: Adrenocortical responsiveness is critical for maintaining glucocorticoids production and homeostasis during stress. We sought to investigate adrenocortical responsiveness during hypoxia in mice and the mechanisms responsible for the regulation of adrenal responsiveness.Methods: (1) Adult male WT mice were randomly divided into four groups: normoxia, hypoxia (24h), hypoxia (72h), hypoxia (72h) + GYY4137(hydrogen sulfide (H2S) donor, 133mmol/kg/day); (2) WT mice were randomly divided into four groups: sham, adrenalectomy (ADX), sham+hypoxia, ADX+hypoxia; (3) Cse-/- mice were randomly divided into two groups: Cse-/-, Cse-/- +GYY4137.Results: The circulatory level of corticosteroid induced by ACTH stimulation was significantly reduced in the mice with hypoxia compared with control mice. The mortality rate induced by lipopolysaccharide (LPS) increased during hypoxia. Cystathionine-γ-lyase (CSE) expression was significantly reduced in adrenal glands during hypoxia. GYY4137 treatment significantly increased adrenal responsiveness and attenuated NLRP3 inflammasome activation in mice treated by hypoxia and Cse-/- mice. Furthermore, The sulfhydrated level of PSMA7 in adrenal gland was decreased in the mice with hypoxia and Cse-/- mice. PSMA7 was S-sulfhydrated at cysteine 70. Blockage of S-sulfhydration of PSMA7 increased NLRP3 expression in adrenocortical cells.Conclusion: Reduced H2S production mediated hypo-adrenocortical responsiveness and NLRP3 inflammasome activation via PAMA7 S-sulfhydration during hypoxia.
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Affiliation(s)
- Ningning Zhang
- National Clinical Research Center for Geriatric Disorders, Central South University Xiangya Hospital, Changsha, People’s Republic of China,International Collaborative Research Center for Medical Metabolomics, Central South University Xiangya Hospital, Changsha, People’s Republic of China,Department of Physiology, Navy Medical University, Shanghai, People’s Republic of China
| | - Zhan Zhou
- National Clinical Research Center for Geriatric Disorders, Central South University Xiangya Hospital, Changsha, People’s Republic of China,International Collaborative Research Center for Medical Metabolomics, Central South University Xiangya Hospital, Changsha, People’s Republic of China
| | - Yan Huang
- Department of Physiology, Navy Medical University, Shanghai, People’s Republic of China
| | - Gang Wang
- Department of Physiology, Navy Medical University, Shanghai, People’s Republic of China
| | - Zhengshan Tang
- National Clinical Research Center for Geriatric Disorders, Central South University Xiangya Hospital, Changsha, People’s Republic of China,International Collaborative Research Center for Medical Metabolomics, Central South University Xiangya Hospital, Changsha, People’s Republic of China
| | - Jianqiang Lu
- The Key Laboratory of Exercise and Health Sciences of Ministry of Education, School of Kinesiology, Shanghai University of Sport, Shanghai, People’s Republic of China
| | - Changnan Wang
- Department of Physiology, Navy Medical University, Shanghai, People’s Republic of China, Changnan Wang Department of Physiology, Navy Medical University, Shanghai200433, People’s Republic of China; Xin Ni
| | - Xin Ni
- National Clinical Research Center for Geriatric Disorders, Central South University Xiangya Hospital, Changsha, People’s Republic of China,International Collaborative Research Center for Medical Metabolomics, Central South University Xiangya Hospital, Changsha, People’s Republic of China,Department of Physiology, Navy Medical University, Shanghai, People’s Republic of China, Changnan Wang Department of Physiology, Navy Medical University, Shanghai200433, People’s Republic of China; Xin Ni
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Zhang Y, Tang J, Li N, Tao J, Zhang Y, Zhang Y, Ye Y, Zheng Q, Xu T, Liu Y, Zhang P, Li L, Li H, He Y, Su H, He Q, Sun M, Xu Z. Prenatal hypoxia induced ET BR activation and abnormal ROS signalling in pulmonary artery cells of rat offspring. Reprod Toxicol 2021; 105:91-100. [PMID: 34478853 DOI: 10.1016/j.reprotox.2021.08.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 08/24/2021] [Accepted: 08/29/2021] [Indexed: 12/22/2022]
Abstract
Pulmonary arterial hypertension is a progressive disorder characterized by remodeling and increased small pulmonary arteries resistance. Endothelin-1 (ET-1) was related to PAH and ET-1 receptors were up-regulated selectively in the lung when exposed to toxic factor hypoxia. However, the role of ET-1 signaling in the pathogenesis of prenatal hypoxia-induced pulmonary abnormalities remains to be elucidated. Pregnant rats were divided into prenatal hypoxia (10.5 % O2 from gestational day 4-21) and control group. Their three-month-old offspring male rats were tested for vascular functions and molecular analysis, DNA methylation was assessed for cellular hypoxia. Functional testing showed that ET-1-mediated vasoconstriction was enhanced, and the expressions of endothelin A receptor/B receptor (ETAR/ETBR), inositol 1,4,5-trisphosphate receptor, type 1, and the sensitivity of calcium channels were increased in the small pulmonary arteries following prenatal hypoxia. q-PCR and DHE staining showed that the expressions of NADPH oxidase 1/4 (Nox1/4) were up-regulated, along with the increased production of superoxide anion. Furthermore, superoxide anion promoted ET-1-mediated pulmonary artery contraction. In the pulmonary artery smooth muscle cell experiments, q-PCR, Western Blot, CCK8 and DHE staining showed that the expressions of ETBR, Nox1/4, and superoxide anion were increased by hypoxia, along with promoted cell proliferation. 2,2,6,6-Tetramethyl-1-piperidinyloxy reversed hypoxia-induced cell proliferation. ETBR antagonist BQ788 inhibited hypoxia-increased expressions of Nox1/4, superoxide anion production, and proliferation of cells. Moreover, methylation analysis indicated that hypoxia decreased the methylation levels of the ETBR promoter in the pulmonary artery smooth muscle cells. The results indicated that prenatal toxic factor hypoxia resulted in abnormal ETBR activation, which enhanced ET-1-mediated vasoconstriction of pulmonary arteries and pulmonary artery smooth muscle cell proliferation through ETBR/Nox1/4-derived ROS pathway.
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Affiliation(s)
- Yingying Zhang
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China; Wuxi Maternal & Child Health Hospital, Jiangsu, China
| | - Jiaqi Tang
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Na Li
- Wuxi Maternal & Child Health Hospital, Jiangsu, China
| | - Jianying Tao
- Department of Obstetrics & Gynecology, Suzhou Municipal Hospital, Suzhou, China
| | - Yan Zhang
- Wuxi Maternal & Child Health Hospital, Jiangsu, China
| | - Yumeng Zhang
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Yang Ye
- Wuxi Maternal & Child Health Hospital, Jiangsu, China
| | - Qiutong Zheng
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Ting Xu
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Yanping Liu
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Pengjie Zhang
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Lingjun Li
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Huan Li
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Yun He
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Hongyu Su
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Qinyuan He
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Miao Sun
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China
| | - Zhice Xu
- Institute for Fetology, First Hospital of Soochow University, Suzhou, China; Wuxi Maternal & Child Health Hospital, Jiangsu, China.
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The newborn sheep translational model for pulmonary arterial hypertension of the neonate at high altitude. J Dev Orig Health Dis 2021; 11:452-463. [PMID: 32705972 DOI: 10.1017/s2040174420000616] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Chronic hypoxia during gestation induces greater occurrence of perinatal complications such as intrauterine growth restriction, fetal hypoxia, newborn asphyxia, and respiratory distress, among others. This condition may also cause a failure in the transition of the fetal to neonatal circulation, inducing pulmonary arterial hypertension of the neonate (PAHN), a syndrome that involves pulmonary vascular dysfunction, increased vasoconstrictor tone and pathological remodeling. As this syndrome has a relatively low prevalence in lowlands (~7 per 1000 live births) and very little is known about its prevalence and clinical evolution in highlands (above 2500 meters), our understanding is very limited. Therefore, studies on appropriate animal models have been crucial to comprehend the mechanisms underlying this pathology. Considering the strengths and weaknesses of any animal model of human disease is fundamental to achieve an effective and meaningful translation to clinical practice. The sheep model has been used to study the normal and abnormal cardiovascular development of the fetus and the neonate for almost a century. The aim of this review is to highlight the advances in our knowledge on the programming of cardiopulmonary function with the use of high-altitude newborn sheep as a translational model of PAHN.
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4
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Singer D. [Surviving the Lack: Natural Adaptations in Newborns]. Z Geburtshilfe Neonatol 2020; 225:203-215. [PMID: 33285584 DOI: 10.1055/a-1019-6007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Newborns are equipped with a number of natural adaptation mechanisms preventing them from impaired energy supply, despite their elevated (size-related) metabolic rate. These include the diving response known from aquatic mammals, which - being composed of apnea, bradycardia, and vasoconstriction - ensures an economical use of O2 reserves and results in a subsequent influx of lactate out of peripheral tissues. From a metabolic point of view, mammalian fetuses behave "like an organ of the mother" and thus exhibit a hibernation-like deviation from the overall metabolic size relationship that adapts them to the limited intrauterine O2/substrate availability. In case of lacking supply, they can reduce their energy demands even further by foregoing growth, with the placenta acting as a gatekeeper. Postnatal hypoxia does not only result in the suppression of non-shivering thermogenesis, but also in a hypoxic hypometabolism that otherwise has only been known from poikilothermic animals. After prolonged apnea, gasps do occur that maintain a rudimentary heart action through short elevations in pO2 (autoresuscitation). Overall, these mechanisms postpone a critical O2 deficit and thereby provide a "resistance" rather than a "tolerance" to hypoxia. As they are based on an (active) reduction in energy demand, they are not easy to distinguish from the (passive) breakdown of metabolism resulting from hypoxia.
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Darby JRT, Varcoe TJ, Orgeig S, Morrison JL. Cardiorespiratory consequences of intrauterine growth restriction: Influence of timing, severity and duration of hypoxaemia. Theriogenology 2020; 150:84-95. [PMID: 32088029 DOI: 10.1016/j.theriogenology.2020.01.080] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 01/31/2020] [Indexed: 12/28/2022]
Abstract
At birth, weight of the neonate is used as a marker of the 9-month journey as a fetus. Those neonates born less than the 10th centile for their gestational age are at risk of being intrauterine growth restricted. However, this depends on their genetic potential for growth and the intrauterine environment in which they grew. Alterations in the supply of oxygen and nutrients to the fetus will decrease fetal growth, but these alterations occur due to a range of causes that are maternal, placental or fetal in nature. Consequently, IUGR neonates are a heterogeneous population. For this reason, it is likely that these neonates will respond differently to interventions compared not only to normally grown fetuses, but also to other neonates that are IUGR but have travelled a different path to get there. Thus, a range of models of IUGR should be studied to determine the effects of IUGR on the development and function of the heart and lung and subsequently the impact of interventions to improve development of these organs. Here we focus on a range of models of IUGR caused by manipulation of the maternal, placental or fetal environment on cardiorespiratory outcomes.
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Affiliation(s)
- Jack R T Darby
- Early Origins of Adult Health Research Group, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Tamara J Varcoe
- Early Origins of Adult Health Research Group, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Sandra Orgeig
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia
| | - Janna L Morrison
- Early Origins of Adult Health Research Group, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.
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Ducsay CA, Goyal R, Pearce WJ, Wilson S, Hu XQ, Zhang L. Gestational Hypoxia and Developmental Plasticity. Physiol Rev 2018; 98:1241-1334. [PMID: 29717932 PMCID: PMC6088145 DOI: 10.1152/physrev.00043.2017] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Hypoxia is one of the most common and severe challenges to the maintenance of homeostasis. Oxygen sensing is a property of all tissues, and the response to hypoxia is multidimensional involving complicated intracellular networks concerned with the transduction of hypoxia-induced responses. Of all the stresses to which the fetus and newborn infant are subjected, perhaps the most important and clinically relevant is that of hypoxia. Hypoxia during gestation impacts both the mother and fetal development through interactions with an individual's genetic traits acquired over multiple generations by natural selection and changes in gene expression patterns by altering the epigenetic code. Changes in the epigenome determine "genomic plasticity," i.e., the ability of genes to be differentially expressed according to environmental cues. The genomic plasticity defined by epigenomic mechanisms including DNA methylation, histone modifications, and noncoding RNAs during development is the mechanistic substrate for phenotypic programming that determines physiological response and risk for healthy or deleterious outcomes. This review explores the impact of gestational hypoxia on maternal health and fetal development, and epigenetic mechanisms of developmental plasticity with emphasis on the uteroplacental circulation, heart development, cerebral circulation, pulmonary development, and the hypothalamic-pituitary-adrenal axis and adipose tissue. The complex molecular and epigenetic interactions that may impact an individual's physiology and developmental programming of health and disease later in life are discussed.
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Affiliation(s)
- Charles A. Ducsay
- The Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
| | - Ravi Goyal
- The Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
| | - William J. Pearce
- The Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
| | - Sean Wilson
- The Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
| | - Xiang-Qun Hu
- The Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
| | - Lubo Zhang
- The Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
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Morton JS, Cooke CL, Davidge ST. In Utero Origins of Hypertension: Mechanisms and Targets for Therapy. Physiol Rev 2016; 96:549-603. [DOI: 10.1152/physrev.00015.2015] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The developmental origins of health and disease theory is based on evidence that a suboptimal environment during fetal and neonatal development can significantly impact the evolution of adult-onset disease. Abundant evidence exists that a compromised prenatal (and early postnatal) environment leads to an increased risk of hypertension later in life. Hypertension is a silent, chronic, and progressive disease defined by elevated blood pressure (>140/90 mmHg) and is strongly correlated with cardiovascular morbidity/mortality. The pathophysiological mechanisms, however, are complex and poorly understood, and hypertension continues to be one of the most resilient health problems in modern society. Research into the programming of hypertension has proposed pharmacological treatment strategies to reverse and/or prevent disease. In addition, modifications to the lifestyle of pregnant women might impart far-reaching benefits to the health of their children. As more information is discovered, more successful management of hypertension can be expected to follow; however, while pregnancy complications such as fetal growth restriction, preeclampsia, preterm birth, etc., continue to occur, their offspring will be at increased risk for hypertension. This article reviews the current knowledge surrounding the developmental origins of hypertension, with a focus on mechanistic pathways and targets for therapeutic and pharmacologic interventions.
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Affiliation(s)
- Jude S. Morton
- Departments of Obstetrics and Gynaecology and of Physiology, University of Alberta, Edmonton, Canada; Women and Children's Health Research Institute, Edmonton, Canada; and Cardiovascular Research Centre, Edmonton, Canada
| | - Christy-Lynn Cooke
- Departments of Obstetrics and Gynaecology and of Physiology, University of Alberta, Edmonton, Canada; Women and Children's Health Research Institute, Edmonton, Canada; and Cardiovascular Research Centre, Edmonton, Canada
| | - Sandra T. Davidge
- Departments of Obstetrics and Gynaecology and of Physiology, University of Alberta, Edmonton, Canada; Women and Children's Health Research Institute, Edmonton, Canada; and Cardiovascular Research Centre, Edmonton, Canada
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Myers DA, Singleton K, Kenkel C, Kaushal KM, Ducsay CA. Gestational hypoxia modulates expression of corticotropin-releasing hormone and arginine vasopressin in the paraventricular nucleus in the ovine fetus. Physiol Rep 2016; 4:e12643. [PMID: 26733242 PMCID: PMC4760403 DOI: 10.14814/phy2.12643] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 10/30/2015] [Accepted: 11/05/2015] [Indexed: 11/24/2022] Open
Abstract
Maturation of the fetal hypothalamo-pituitary-adrenocortical (HPA) axis is critical for organ maturation necessary for the fetus to transition to the ex-utero environment. Intrauterine stressors can hasten maturation of the HPA axis leading to fetal growth restriction and in sheep, premature birth. We have previously reported that high-altitude mediated, long-term-moderate gestational hypoxia (LTH) during gestation has a significant impact on the fetal HPA axis. Significant effects were observed at the level of both the anterior pituitary and adrenal cortex resulting in elevated plasma ACTH during late gestation with decreased adrenocortical expression of enzymes rate limiting for cortisol synthesis. As such, these fetuses exhibited the normal ontogenic rise in fetal plasma cortisol but an exaggerated cortisol response to acute stress. This study extended these findings to ACTH secretagogue expression in the PVN using in situ hybridization. We report that the expression of AVP but not CRH was increased in the medial parvocellular PVN (mpPVN) in the LTH fetus. This represented an increase in both AVP mRNA per neuron as well as an increase in AVP hybridizing neurons with no increase in mpPVN CRH neurons. LTH had no effect on PVN volume, area of CRH or AVP hybridization, thus LTH did not have a trophic effect on the size of the nucleus. In conclusion, there appears to be a switch from CRH to AVP as a primary ACTH secretagogue in response to LTH, supporting our previous findings of increased anterior pituitary sensitivity to AVP over CRH in the LTH fetus.
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Affiliation(s)
- Dean A Myers
- Department of Obstetrics and Gynecology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Krista Singleton
- Department of Obstetrics and Gynecology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Christy Kenkel
- Department of Obstetrics and Gynecology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Kanchan M Kaushal
- School of Medicine, The Center for Perinatal Biology Loma Linda University, Loma Linda, California
| | - Charles A Ducsay
- School of Medicine, The Center for Perinatal Biology Loma Linda University, Loma Linda, California
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