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Du X, Wang H, Liu S, Song Y, Chen X, Chen Z, Zhou R, Du J, Zhang W, Gao R, Li H, Zhang G, Mao X, Chang L, Wu Y. Astrocytic GluN2A alleviates sleep deprivation-induced elevation of Aβ through regulating neprilysin and AQP4 via the calcineurin/NFAT pathway. Prog Neurobiol 2025; 248:102744. [PMID: 40032156 DOI: 10.1016/j.pneurobio.2025.102744] [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: 05/14/2024] [Revised: 12/22/2024] [Accepted: 02/24/2025] [Indexed: 03/05/2025]
Abstract
Sleep disorders can increase amyloid beta (Aβ) burden in the brain and are linked to Alzheimer's disease (AD) risk. The precise mechanism by which sleep disturbances elevate Aβ levels is unclear. Our previous study has demonstrated that knocking down encoding gene Grin2a of astrocytic N-methyl-D-aspartate (NMDA) receptors GluN2A subunit could aggravate sleep deprivation (SD)-induced elevation of Aβ, indicating a protective role of astrocytic GluN2A in SD; but the underlying mechanism needs to be further elucidated. In our present study, using rat models of SD combined with specific astrocytic Grin2a knockdown or overexpression in the hippocampus, and a cell model of primary cultured hippocampal astrocytes, we reveal a novel mechanism that astrocytic GluN2A alleviates SD-induced increases in Aβ. We demonstrated that astrocytic GluN2A mainly affected Aβ degradation and clearance through regulating degradation enzyme neprilysin and Aquaporin-4 (AQP4), via the calcineurin/NFAT pathway. Our study provides supportive evidence for the novel role and mechanism of astrocytic GluN2A in Aβ elimination, which would contribute to the discovery of new therapeutic strategies for Aβ-related diseases such as AD.
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Affiliation(s)
- Xiaoqiang Du
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Hongqi Wang
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Siyu Liu
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Yizhi Song
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Xinyue Chen
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Ziyan Chen
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Ruying Zhou
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Jiahe Du
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Wanning Zhang
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Ruiqi Gao
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Hui Li
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Guitao Zhang
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Xin Mao
- Department of Radiology, Peking University Third Hospital, Beijing 100068, China.
| | - Lirong Chang
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China.
| | - Yan Wu
- Department of Anatomy, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100069, China; College of Veterinary Medicine, Beijing University of Agriculture, Beijing 100096, China.
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Vasilev DS, Dubrovskaya NM, Tumanova NL, Tursunov AN, Nalivaeva NN. Valproate Administration to Adult 5xFAD Mice Upregulates Expression of Neprilysin and Improves Olfaction and Memory. J Mol Neurosci 2024; 74:110. [PMID: 39549146 DOI: 10.1007/s12031-024-02287-3] [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: 10/02/2024] [Accepted: 11/01/2024] [Indexed: 11/18/2024]
Abstract
It is well known that the development of neurodegeneration, and especially Alzheimer's disease (AD), is often accompanied by impaired olfaction which precedes memory loss. A neuropeptidase neprilysin (NEP)-a principal amyloid-degrading enzyme in the brain-was also shown to be involved in olfactory signalling. Previously we have demonstrated that 5xFAD mice develop olfactory deficit by the age of 6 months which correlated with reduced NEP expression in the brain areas involved in olfactory signalling. The aim of this study was to analyse the effect of administration of a histone deacetylase inhibitor, valproic acid (VA), to adult 5xFAD mice on their olfaction and memory as well as on brain morphology and NEP expression in the parietal cortex (PC) and hippocampus (Hip). The data obtained demonstrated that administration of VA to 7-month-old mice (200 mg/kg of body weight) for 28 days resulted in improvement of their memory in the Morris water maze as well as olfaction in the odor preference and food search tests. This correlated with increased expression of NEP in the PC and Hip as well as a reduced number of amyloid plaques in these brain areas. This strongly suggests that NEP can be considered an important therapeutic target not only in AD but also in olfactory loss.
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Affiliation(s)
- Dmitrii S Vasilev
- Institute of Evolutionary Physiology and Biochemistry RAS, 44 Thorez Avenue, Saint Petersburg, 194223, Russia.
| | - Nadezhda M Dubrovskaya
- Institute of Evolutionary Physiology and Biochemistry RAS, 44 Thorez Avenue, Saint Petersburg, 194223, Russia
| | - Natalia L Tumanova
- Institute of Evolutionary Physiology and Biochemistry RAS, 44 Thorez Avenue, Saint Petersburg, 194223, Russia
| | - Aleksandr N Tursunov
- Institute of Evolutionary Physiology and Biochemistry RAS, 44 Thorez Avenue, Saint Petersburg, 194223, Russia
| | - Natalia N Nalivaeva
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK.
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Cui C, Jiang X, Wang Y, Li C, Lin Z, Wei Y, Ni Q. Cerebral Hypoxia-Induced Molecular Alterations and Their Impact on the Physiology of Neurons and Dendritic Spines: A Comprehensive Review. Cell Mol Neurobiol 2024; 44:58. [PMID: 39105862 PMCID: PMC11303443 DOI: 10.1007/s10571-024-01491-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Accepted: 07/15/2024] [Indexed: 08/07/2024]
Abstract
This article comprehensively reviews how cerebral hypoxia impacts the physiological state of neurons and dendritic spines through a series of molecular changes, and explores the causal relationship between these changes and neuronal functional impairment. As a severe pathological condition, cerebral hypoxia can significantly alter the morphology and function of neurons and dendritic spines. Specifically, dendritic spines, being the critical structures for neurons to receive information, undergo changes such as a reduction in number and morphological abnormalities under hypoxic conditions. These alterations further affect synaptic function, leading to neurotransmission disorders. This article delves into the roles of molecular pathways like MAPK, AMPA receptors, NMDA receptors, and BDNF in the hypoxia-induced changes in neurons and dendritic spines, and outlines current treatment strategies. Neurons are particularly sensitive to cerebral hypoxia, with their apical dendrites being vulnerable to damage, thereby affecting cognitive function. Additionally, astrocytes and microglia play an indispensable role in protecting neuronal and synaptic structures, regulating their normal functions, and contributing to the repair process following injury. These studies not only contribute to understanding the pathogenesis of related neurological diseases but also provide important insights for developing novel therapeutic strategies. Future research should further focus on the dynamic changes in neurons and dendritic spines under hypoxic conditions and their intrinsic connections with cognitive function.
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Affiliation(s)
- Chao Cui
- Hydrogen Medical Research Center, The Affiliated Taian City Central Hospital of Qingdao University, Taian, 271000, Shandong, China
| | - Xue Jiang
- Hydrogen Medical Research Center, The Affiliated Taian City Central Hospital of Qingdao University, Taian, 271000, Shandong, China
| | - Yumei Wang
- Hydrogen Medical Research Center, The Affiliated Taian City Central Hospital of Qingdao University, Taian, 271000, Shandong, China
| | - Chao Li
- Hydrogen Medical Research Center, The Affiliated Taian City Central Hospital of Qingdao University, Taian, 271000, Shandong, China
| | - Zhaochen Lin
- Hydrogen Medical Research Center, The Affiliated Taian City Central Hospital of Qingdao University, Taian, 271000, Shandong, China
| | - Youzhen Wei
- Hydrogen Medical Research Center, The Affiliated Taian City Central Hospital of Qingdao University, Taian, 271000, Shandong, China.
- Research Center for Translational Medicine & Key Laboratory of Arrhythmias of the Ministry of Education of China, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200000, China.
| | - Qingbin Ni
- Hydrogen Medical Research Center, The Affiliated Taian City Central Hospital of Qingdao University, Taian, 271000, Shandong, China.
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Atta S, Mekky R, Ibrahim M, Abdallah MM, Elbaz MAH, Radwan E. Increased Expression of Neprilysin Is Associated with Inflammation in Preeclampsia. Reprod Sci 2024; 31:1385-1390. [PMID: 38114865 PMCID: PMC11090941 DOI: 10.1007/s43032-023-01410-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 11/08/2023] [Indexed: 12/21/2023]
Abstract
Preeclampsia (PE) is associated with a finely tuned equilibrium between trophoblast cell invasion and fetal-maternal immunological tolerance. An imbalance between proinflammatory (IL-6) and anti-inflammatory (IL-10) cytokines is a hallmark of PE. Neprilysin (NEP), a membrane-bound metalloprotease, is vulnerable to the inflammatory environment and plays a significant role in modulating vascular tone. The aim of this study was to determine the correlation between NEP (mRNA and protein) levels and the inflammatory status in PE patients compared to healthy pregnant women and to identify the role of NEP in evaluating the severity of preeclampsia. The study group comprised 52 pregnant women with PE while the control group comprised 47 normotensive pregnant women. After a caesarean section, placental tissue samples from patients and controls were collected to measure the expression levels of IL-6, TGF-β, IL-10, and NEP mRNA. In addition, an enzyme-linked immunosorbent assay was used to assess the quantity of NEP protein in blood samples. Our results revealed a significant positive correlation between NEP (mRNA and protein) and proinflammatory markers IL-6 and TGF-β levels in patients compared to controls and a significant inverse correlation between NEP and anti-inflammatory cytokine IL-10. Moreover, this is the first study to find a strong positive correlation between NEP level and PE severity. In conclusion, in PE patients, there is a substantial relationship between NEP, the degree of inflammation, and PE severity. NEP could act as a potential biomarker for diagnosis and prognosis of PE.
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Affiliation(s)
- Sara Atta
- Medical Biochemistry Department, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Rehab Mekky
- Institute for Drug Development and Innovation Research, Assiut University, Assiut, Egypt
| | - Mostafa Ibrahim
- Department of Obstetrics and Gynecology, Assiut University, Assiut, Egypt
| | - Mohamed M Abdallah
- Department of Obstetrics and Gynecology, Assiut University, Assiut, Egypt.
| | - Mona A H Elbaz
- Medical Biochemistry Department, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Eman Radwan
- Medical Biochemistry Department, Faculty of Medicine, Assiut University, Assiut, Egypt
- Biochemistry Department, Sphinx University, New Assiut, Assiut, Egypt
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Lu L, Shi Y, Wei B, Li W, Yu X, Zhao Y, Yu D, Sun M. YTHDF3 modulates the Cbln1 level by recruiting BTG2 and is implicated in the impaired cognition of prenatal hypoxia offspring. iScience 2024; 27:108703. [PMID: 38205248 PMCID: PMC10776956 DOI: 10.1016/j.isci.2023.108703] [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: 04/13/2023] [Revised: 09/22/2023] [Accepted: 12/06/2023] [Indexed: 01/12/2024] Open
Abstract
The "Fetal Origins of Adult Disease (FOAD)" hypothesis holds that adverse factors during pregnancy can increase the risk of chronic diseases in offspring. Here, we investigated the effects of prenatal hypoxia (PH) on brain structure and function in adult offspring and explored the role of the N6-methyladenosine (m6A) pathway. The results suggest that abnormal cognition in PH offspring may be related to the dysregulation of the m6A pathway, specifically increased levels of YTHDF3 in the hippocampus. YTHDF3 interacts with BTG2 and is involved in the decay of Cbln1 mRNA, leading to the down-regulation of Cbln1 expression. Deficiency of Cbln1 may contribute to abnormal synaptic function, which in turn causes cognitive impairment in PH offspring. This study provides a scientific clues for understanding the mechanisms of impaired cognition in PH offspring and provides a theoretical basis for the treatment of cognitive impairment in offspring exposed to PH.
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Affiliation(s)
- Likui Lu
- Institute for Fetology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu, China
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yajun Shi
- Institute for Fetology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu, China
| | - Bin Wei
- Institute for Fetology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu, China
| | - Weisheng Li
- Department of Gynaecology, Qingdao Hospital, University of Health and Rehabilitation Sciences (Qingdao Municipal Hospital), Qingdao, Shandong, China
| | - Xi Yu
- Institute for Fetology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu, China
| | - Yan Zhao
- Institute for Fetology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu, China
| | - Dongyi Yu
- Center for Medical Genetics and Prenatal Diagnosis, Key Laboratory of Birth Defect Prevention and Genetic, Medicine of Shandong Health Commission, Key Laboratory of Birth Regulation and Control Technology of National Health Commission of China, Shandong Provincial Maternal and Child Health Care Hospital Affiliated to Qingdao University, Jinan, Shandong, China
| | - Miao Sun
- Institute for Fetology, The First Affiliated Hospital of Soochow University, Suzhou City, Jiangsu, China
- Dushu Lake Hospital Affiliated to Soochow University, Suzhou, Jiangsu Province, China
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Reduced Expression of Voltage-Gated Sodium Channel Beta 2 Restores Neuronal Injury and Improves Cognitive Dysfunction Induced by A β1-42. Neural Plast 2022; 2022:3995227. [PMID: 36406589 PMCID: PMC9671742 DOI: 10.1155/2022/3995227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 10/05/2022] [Accepted: 10/18/2022] [Indexed: 11/12/2022] Open
Abstract
Voltage-gated sodium channel beta 2 (Nav2.2 or Navβ2, coded by SCN2B mRNA), a gene involved in maintaining normal physiological functions of the prefrontal cortex and hippocampus, might be associated with prefrontal cortex aging and memory decline. This study investigated the effects of Navβ2 in amyloid-β 1-42- (Aβ1-42-) induced neural injury model and the potential underlying molecular mechanism. The results showed that Navβ2 knockdown restored neuronal viability of Aβ1-42-induced injury in neurons; increased the contents of brain-derived neurotrophic factor (BDNF), enzyme neprilysin (NEP) protein, and NEP enzyme activity; and effectively altered the proportions of the amyloid precursor protein (APP) metabolites including Aβ42, sAPPα, and sAPPβ, thus ameliorating cognitive dysfunction. This may be achieved through regulating NEP transcription and APP metabolism, accelerating Aβ degradation, alleviating neuronal impairment, and regulating BDNF-related signal pathways to repair neuronal synaptic efficiency. This study provides novel evidence indicating that Navβ2 plays crucial roles in the repair of neuronal injury induced by Aβ1-42 both in vivo and in vitro.
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Nikolaeva NS, Yandulova EY, Aleksandrova YR, Starikov AS, Neganova ME. The Role of a Pathological Interaction between β-amyloid and Mitochondria in the Occurrence and Development of Alzheimer's Disease. Acta Naturae 2022; 14:19-34. [PMID: 36348714 PMCID: PMC9611857 DOI: 10.32607/actanaturae.11723] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/05/2022] [Indexed: 11/20/2022] Open
Abstract
Alzheimer's disease (AD) is one of the most common neurodegenerative diseases in existence. It is characterized by an impaired cognitive function that is due to a progressive loss of neurons in the brain. Extracellular β-amyloid (Aβ) plaques are the main pathological features of the disease. In addition to abnormal protein aggregation, increased mitochondrial fragmentation, altered expression of the genes involved in mitochondrial biogenesis, disruptions in the ER-mitochondria interaction, and mitophagy are observed. Reactive oxygen species are known to affect Aβ expression and aggregation. In turn, oligomeric and aggregated Aβ cause mitochondrial disorders. In this review, we summarize available knowledge about the pathological effects of Aβ on mitochondria and the potential molecular targets associated with proteinopathy and mitochondrial dysfunction for the pharmacological treatment of Alzheimer's disease.
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Affiliation(s)
- N. S. Nikolaeva
- Federal State Budgetary Institution of Science Institute of Physiologically Active Compounds of the Russian Academy of Sciences, Chernogolovka, 142432 Russia
| | - E. Yu. Yandulova
- Federal State Budgetary Institution of Science Institute of Physiologically Active Compounds of the Russian Academy of Sciences, Chernogolovka, 142432 Russia
| | - Yu. R. Aleksandrova
- Federal State Budgetary Institution of Science Institute of Physiologically Active Compounds of the Russian Academy of Sciences, Chernogolovka, 142432 Russia
| | - A. S. Starikov
- Federal State Budgetary Institution of Science Institute of Physiologically Active Compounds of the Russian Academy of Sciences, Chernogolovka, 142432 Russia
| | - M. E. Neganova
- Federal State Budgetary Institution of Science Institute of Physiologically Active Compounds of the Russian Academy of Sciences, Chernogolovka, 142432 Russia
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Vasilev D, Dubrovskaya NM, Nalivaeva NN. Caspase Inhibition Restores NEP Expression and Rescues Olfactory Deficit in Rats Caused by Prenatal Hypoxia. J Mol Neurosci 2022; 72:1516-1526. [PMID: 35344141 DOI: 10.1007/s12031-022-01986-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 02/17/2022] [Indexed: 02/05/2023]
Abstract
Development of the olfactory system begins early in embryogenesis and is important for the survival of new-borns in postnatal life. Olfactory malfunction in early life disrupts development of behavioural patterns while with ageing manifests development of neurodegenerative disorders. Previously, we have shown that prenatal hypoxia in rats leads to impaired olfaction in the offspring and correlates with reduced expression of a neuropeptidase neprilysin (NEP) in the brain structures involved in processing of the olfactory stimuli. Prenatal hypoxia also resulted in an increased activity of caspases in rat brain and its inhibition restored NEP content in the brain tissue and improved rat memory. In this study, we have analysed effects of intraventricular administration of a caspase inhibitor Ac-DEVD-CHO on NEP mRNA expression, the number of dendritic spines and olfactory function of rats subjected to prenatal hypoxia on E14. The data obtained demonstrated that a single injection of the inhibitor on P20 restored NEP mRNA levels and number of dendritic spines in the entorhinal and parietal cortices, hippocampus and rescued rat olfactory function in food search and odour preference tests. The data obtained suggest that caspase activation caused by prenatal hypoxia contributes to the olfactory dysfunction in developing animals and that caspase inhibition restores the olfactory deficit via upregulating NEP expression and neuronal networking. Because NEP is a major amyloid-degrading enzyme, any decrease in its expression and activity not only impairs brain functions but also predisposes to accumulation of the amyloid-β peptide and development of neurodegeneration characteristic of Alzheimer's disease.
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Affiliation(s)
- Dimitrii Vasilev
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, 44 Thorez av, Saint Petersburg, 194223, Russia.
| | - Nadezhda M Dubrovskaya
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, 44 Thorez av, Saint Petersburg, 194223, Russia
| | - Natalia N Nalivaeva
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, 44 Thorez av, Saint Petersburg, 194223, Russia.,School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
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Sokolov AV, Dubrovskaya NM, Kostevich VA, Vasilev DS, Voynova IV, Zakharova ET, Runova OL, Semak IV, Budevich AI, Nalivaeva NN, Vasilyev VB. Lactoferrin Induces Erythropoietin Synthesis and Rescues Cognitive Functions in the Offspring of Rats Subjected to Prenatal Hypoxia. Nutrients 2022; 14:nu14071399. [PMID: 35406012 PMCID: PMC9003537 DOI: 10.3390/nu14071399] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 03/18/2022] [Accepted: 03/24/2022] [Indexed: 02/06/2023] Open
Abstract
The protective effects of recombinant human lactoferrin rhLF (branded “CAPRABEL™”) on the cognitive functions of rat offspring subjected to prenatal hypoxia (7% O2, 3 h, 14th day of gestation) have been analyzed. About 90% of rhLF in CAPRABEL was iron-free (apo-LF). Rat dams received several injections of 10 mg of CAPRABEL during either gestation (before and after the hypoxic attack) or lactation. Western blotting revealed the appearance of erythropoietin (EPO) alongside the hypoxia-inducible factors (HIFs) in organ homogenates of apo-rhLF-treated pregnant females, their embryos (but not placentas), and in suckling pups from the dams treated with apo-rhLF during lactation. Apo-rhLF injected to rat dams either during pregnancy or nurturing the pups was able to rescue cognitive deficits caused by prenatal hypoxia and improve various types of memory both in young and adult offspring when tested in the radial maze and by the Novel Object Recognition (NOR) test. The data obtained suggested that the apo-form of human LF injected to female rats during gestation or lactation protects the cognitive functions of their offspring impaired by prenatal hypoxia.
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Affiliation(s)
- Alexey V. Sokolov
- Department of Molecular Genetics, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint-Petersburg, Russia; (V.A.K.); (I.V.V.); (E.T.Z.); (O.L.R.)
- Faculty of Dental Medicine and Medical Technologies, Saint Petersburg State University, 8A 21st Line V.O., 199034 Saint-Petersburg, Russia
- Correspondence: (A.V.S.); (V.B.V.)
| | - Nadezhda M. Dubrovskaya
- Laboratory of Physiology and Pathology of CNS, Sechenov Institute of Evolutionary Physiology and Biochemistry, 44 Thorez Ave., 194223 Saint-Petersburg, Russia; (N.M.D.); (D.S.V.); (N.N.N.)
| | - Valeria A. Kostevich
- Department of Molecular Genetics, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint-Petersburg, Russia; (V.A.K.); (I.V.V.); (E.T.Z.); (O.L.R.)
| | - Dmitrii S. Vasilev
- Laboratory of Physiology and Pathology of CNS, Sechenov Institute of Evolutionary Physiology and Biochemistry, 44 Thorez Ave., 194223 Saint-Petersburg, Russia; (N.M.D.); (D.S.V.); (N.N.N.)
| | - Irina V. Voynova
- Department of Molecular Genetics, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint-Petersburg, Russia; (V.A.K.); (I.V.V.); (E.T.Z.); (O.L.R.)
| | - Elena T. Zakharova
- Department of Molecular Genetics, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint-Petersburg, Russia; (V.A.K.); (I.V.V.); (E.T.Z.); (O.L.R.)
| | - Olga L. Runova
- Department of Molecular Genetics, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint-Petersburg, Russia; (V.A.K.); (I.V.V.); (E.T.Z.); (O.L.R.)
| | - Igor V. Semak
- Department of Biochemistry, Faculty of Biology, Belarusian State University, Nezavisimisty Ave. 4, 220030 Minsk, Belarus;
| | - Alexander I. Budevich
- Scientific and Practical Centre on Animal Husbandry of the National Academy of Sciences of Belarus, 11 Frunze Str., 222160 Zhodino, Belarus;
| | - Natalia N. Nalivaeva
- Laboratory of Physiology and Pathology of CNS, Sechenov Institute of Evolutionary Physiology and Biochemistry, 44 Thorez Ave., 194223 Saint-Petersburg, Russia; (N.M.D.); (D.S.V.); (N.N.N.)
| | - Vadim B. Vasilyev
- Department of Molecular Genetics, Institute of Experimental Medicine, Acad. Pavlov Str. 12, 197376 Saint-Petersburg, Russia; (V.A.K.); (I.V.V.); (E.T.Z.); (O.L.R.)
- Faculty of Dental Medicine and Medical Technologies, Saint Petersburg State University, 8A 21st Line V.O., 199034 Saint-Petersburg, Russia
- Correspondence: (A.V.S.); (V.B.V.)
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Catarina Duarte A, Raquel Costa A, Gonçalves I, Quintela T, Preissner R, R A Santos C. The druggability of bitter taste receptors for the treatment of neurodegenerative disorders. Biochem Pharmacol 2022; 197:114915. [PMID: 35051386 DOI: 10.1016/j.bcp.2022.114915] [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: 11/04/2021] [Revised: 01/05/2022] [Accepted: 01/10/2022] [Indexed: 12/14/2022]
Abstract
The delivery of therapeutic drugs to the brain remains a major pharmacology challenge. A complex system of chemical surveillance to protect the brain from endogenous and exogenous toxicants at brain barriers hinders the uptake of many compounds with significant in vitro and ex vivo therapeutic properties. Despite the advances in the field in recent years, the components of this system are not completely understood. Recently, a large group of chemo-sensing receptors, have been identified in the blood-cerebrospinal fluid barrier. Among these chemo-sensing receptors, bitter taste receptors (TAS2R) hold promise as potential drug targets, as many TAS2R bind compounds with recognized neuroprotective activity (quercetin, resveratrol, among others). Whether activation of TAS2R by their ligands contributes to their diverse biological actions described in other cells and tissues is still debatable. In this review, we discuss the potential role of TAS2R gene family as the mediators of the biological activity of their ligands for the treatment of central nervous system disorders and discuss their potential to counteract drug resistance by improving drug delivery to the brain.
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Affiliation(s)
- Ana Catarina Duarte
- CICS-UBI - Health Sciences Research Center, University of Beira Interior, Covilhã, Portugal; CPIRN-IPG- Centro de Potencial e Inovação de Recursos Naturais- Instituto Politécnico da Guarda, Av. Dr. Francisco de Sá Carneiro, 6300-559, Guarda, Portugal
| | - Ana Raquel Costa
- CICS-UBI - Health Sciences Research Center, University of Beira Interior, Covilhã, Portugal
| | - Isabel Gonçalves
- CICS-UBI - Health Sciences Research Center, University of Beira Interior, Covilhã, Portugal
| | - Telma Quintela
- CICS-UBI - Health Sciences Research Center, University of Beira Interior, Covilhã, Portugal
| | - Robert Preissner
- Institute of Physiology and Science-IT, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Philippstrasse 12, 10115, Berlin, Germany
| | - Cecília R A Santos
- CICS-UBI - Health Sciences Research Center, University of Beira Interior, Covilhã, Portugal.
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11
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Babusikova E, Dobrota D, Turner AJ, Nalivaeva NN. Effect of Global Brain Ischemia on Amyloid Precursor Protein Metabolism and Expression of Amyloid-Degrading Enzymes in Rat Cortex: Role in Pathogenesis of Alzheimer's Disease. BIOCHEMISTRY (MOSCOW) 2021; 86:680-692. [PMID: 34225591 DOI: 10.1134/s0006297921060067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The incidence of Alzheimer's disease (AD) increases significantly following chronic stress and brain ischemia which, over the years, cause accumulation of toxic amyloid species and brain damage. The effects of global 15-min ischemia and 120-min reperfusion on the levels of expression of the amyloid precursor protein (APP) and its processing were investigated in the brain cortex (Cx) of male Wistar rats. Additionally, the levels of expression of the amyloid-degrading enzymes neprilysin (NEP), endothelin-converting enzyme-1 (ECE-1), and insulin-degrading enzyme (IDE), as well as of some markers of oxidative damage were assessed. It was shown that the APP mRNA and protein levels in the rat Cx were significantly increased after the ischemic insult. Protein levels of the soluble APP fragments, especially of sAPPβ produced by β-secretase, (BACE-1) and the levels of BACE-1 mRNA and protein expression itself were also increased after ischemia. The protein levels of APP and BACE-1 in the Cx returned to the control values after 120-min reperfusion. The levels of NEP and ECE-1 mRNA also decreased after ischemia, which correlated with the decreased protein levels of these enzymes. However, we have not observed any changes in the protein levels of insulin-degrading enzyme. Contents of the markers of oxidative damage (di-tyrosine and lysine conjugates with lipid peroxidation products) were also increased after ischemia. The obtained data suggest that ischemia shifts APP processing towards the amyloidogenic β-secretase pathway and accumulation of the neurotoxic Aβ peptide as well as triggers oxidative stress in the cells. These results are discussed in the context of the role of stress and ischemia in initiation and progression of AD.
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Affiliation(s)
- Eva Babusikova
- Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Department of Medical Biochemistry, Martin, 036 01, Slovakia.
| | - Dusan Dobrota
- Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin, Department of Medical Biochemistry, Martin, 036 01, Slovakia.
| | - Anthony J Turner
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom.
| | - Natalia N Nalivaeva
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, United Kingdom. .,Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, 194223, Russia
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12
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Vasilev DS, Dubrovskaya NM, Zhuravin IA, Nalivaeva NN. Developmental Profile of Brain Neprilysin Expression Correlates with Olfactory Behaviour of Rats. J Mol Neurosci 2021; 71:1772-1785. [PMID: 33433852 DOI: 10.1007/s12031-020-01786-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/25/2020] [Indexed: 12/26/2022]
Abstract
A neuropeptidase, neprilysin (NEP), is a major amyloid (Aβ)-degrading enzyme involved in the pathogenesis of Alzheimer's disease (AD). The olfactory system is affected early in AD with characteristic Aβ accumulation, but data on the dynamics of NEP expression in the olfactory system are absent. Our study demonstrates that NEP mRNA expression in rat olfactory bulbs (OB), entorhinal cortex (ECx), hippocampus (Hip), parietal cortex (PCx) and striatum (Str) increases during the first postnatal month being the highest in the OB and Str. By 3 months, NEP mRNA levels sharply decrease in the ECx, Hip and PCx and by 9 months in the OB, but not in the Str, which correlates with declining olfaction in aged rats tested in the food search paradigm. One-month-old rats subjected to prenatal hypoxia on E14 had lower NEP mRNA levels in the ECx, Hip and PCx (but not in the OB and Str) compared with the control offspring and demonstrated impaired olfaction in the odour preference and food search paradigms. Administration to these rats of a histone deacetylase inhibitor, sodium valproate, restored NEP expression in the ECx, Hip and PCx and improved olfaction. Our data support NEP involvement in olfactory function.
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Affiliation(s)
- Dimitrii S Vasilev
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, 44 Thorez Avenue, Saint Petersburg, 194223, Russia
| | - Nadezhda M Dubrovskaya
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, 44 Thorez Avenue, Saint Petersburg, 194223, Russia
| | - Igor A Zhuravin
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, 44 Thorez Avenue, Saint Petersburg, 194223, Russia
| | - Natalia N Nalivaeva
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, RAS, 44 Thorez Avenue, Saint Petersburg, 194223, Russia. .,School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK.
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13
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Vetrovoy O, Stratilov V, Nimiritsky P, Makarevich P, Tyulkova E. Prenatal Hypoxia Induces Premature Aging Accompanied by Impaired Function of the Glutamatergic System in Rat Hippocampus. Neurochem Res 2021; 46:550-563. [PMID: 33389385 DOI: 10.1007/s11064-020-03191-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 11/17/2020] [Accepted: 11/28/2020] [Indexed: 12/27/2022]
Abstract
Prenatal hypoxia is among leading causes of progressive brain pathologies in postnatal life. This study aimed to analyze the characteristics of the hippocampal glutamatergic system and behavior of rats in early (2 weeks), adult (3 months) and advanced (18 months) postnatal ontogenesis after exposure to prenatal severe hypoxia (PSH, 180 Torr, 5% O2, 3 h) during the critical period in the formation of the hippocampus (days 14-16 of gestation). We have shown an age-dependent progressive decrease in the hippocampal glutamate levels, a decrease of the neuronal cell number in the CA1 hippocampal region, as well as impairment of spatial long-term memory in the Morris water navigation task. The gradual decrease of glutamate was accompanied by decreased expression of the genes that mediate glutamate metabolism and recycling in the hippocampus. That deficiency apparently correlated with an increase of the metabotropic glutamate receptor type 1 (mGluR1) and synaptophysin expression. Generation of the lipid peroxidation products in the hippocampus of adult rats subjected to prenatal severe hypoxia (PSH rats) was not increased compared to the control animals when tested in a model of glutamate excitotoxicity induced by severe hypoxia. This demonstrates that excessive glutamate sensitivity in PSH rats does not compensate for glutamate deficiency. Our results show a significant contribution of the glutamate system dysfunction to age-associated decrease of this mediator, cognitive decline, and early neuronal loss in PSH rats.
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Affiliation(s)
- Oleg Vetrovoy
- Laboratory of Regulation of Brain Neuron Functions, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova emb. 6, Saint-Petersburg, Russia, 199034. .,Department of Biochemistry, Faculty of Biology, Saint-Petersburg State University, Universitetskaya emb. 7-9, Saint-Petersburg, Russia, 199034.
| | - Viktor Stratilov
- Laboratory of Regulation of Brain Neuron Functions, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova emb. 6, Saint-Petersburg, Russia, 199034
| | - Peter Nimiritsky
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Lomonosov Ave. 27-10, Moscow, Russia, 119192.,Faculty of Medicine, Lomonosov Moscow State University, Lomonosov Ave. 31-5, Moscow, Russia, 119192
| | - Pavel Makarevich
- Institute for Regenerative Medicine, Medical Research and Education Center, Lomonosov Moscow State University, Lomonosov Ave. 27-10, Moscow, Russia, 119192.,Faculty of Medicine, Lomonosov Moscow State University, Lomonosov Ave. 31-5, Moscow, Russia, 119192
| | - Ekaterina Tyulkova
- Laboratory of Regulation of Brain Neuron Functions, Pavlov Institute of Physiology, Russian Academy of Sciences, Makarova emb. 6, Saint-Petersburg, Russia, 199034
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14
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Gozes I, Nalivaeva NN, Hirrlinger J, Blumrich EM, Turner AJ. Molecular Mechanisms of Cognitive Impairment and Intellectual Disability-Virtual ESN Mini-Conference in Conjunction with the FENS Forum, July 11-15, 2020. J Mol Neurosci 2020; 70:1927-1933. [PMID: 33089437 DOI: 10.1007/s12031-020-01718-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Illana Gozes
- Elton Laboratory for Molecular Neuroendocrinology, Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Sagol School of Neuroscience and Adams Super Center for Brain Studies, Tel Aviv University, 69978, Tel Aviv, Israel.
| | - Natalia N Nalivaeva
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK.,I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, Saint Petersburg, Russia
| | - Johannes Hirrlinger
- Carl-Ludwig-Institute for Physiology, University of Leipzig, Leipzig, Germany.,Department of Neurogenetics, Max-Planck-Institute for Experimental Medicine, Göttingen, Germany
| | - Eva-Maria Blumrich
- Centre for Brain Discovery Sciences, School for Biomedical Sciences, University of Edinburgh, Edinburgh, UK
| | - Anthony J Turner
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK
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15
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Nalivaeva NN, Zhuravin IA, Turner AJ. Neprilysin expression and functions in development, ageing and disease. Mech Ageing Dev 2020; 192:111363. [PMID: 32987038 PMCID: PMC7519013 DOI: 10.1016/j.mad.2020.111363] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/17/2020] [Accepted: 09/20/2020] [Indexed: 12/21/2022]
Abstract
Neprilysin (NEP) is an integral membrane-bound metallopeptidase with a wide spectrum of substrates and physiological functions. It plays an important role in proteolytic processes in the kidney, cardiovascular regulation, immune response, cell proliferation, foetal development etc. It is an important neuropeptidase and amyloid-degrading enzyme which makes NEP a therapeutic target in Alzheimer's disease (AD). Moreover, it plays a preventive role in development of cancer, obesity and type-2 diabetes. Recently a role of NEP in COVID-19 pathogenesis has also been suggested. Despite intensive research into NEP structure and functions in different organisms, changes in its expression and regulation during brain development and ageing, especially in age-related pathologies, is still not fully understood. This prevents development of pharmacological treatments from various diseases in which NEP is implicated although recently a dual-acting drug sacubitril-valsartan (LCZ696) combining a NEP inhibitor and angiotensin receptor blocker has been approved for treatment of heart failure. Also, various natural compounds capable of upregulating NEP expression, including green tea (EGCG), have been proposed as a preventive medicine in prostate cancer and AD. This review summarizes the existing literature and our own research on the expression and activity of NEP in normal brain development, ageing and under pathological conditions.
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Affiliation(s)
- N N Nalivaeva
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, Russia; School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom.
| | - I A Zhuravin
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, St. Petersburg, Russia
| | - A J Turner
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
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16
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Maternal Overweight Downregulates MME (Neprilysin) in Feto-Placental Endothelial Cells and in Cord Blood. Int J Mol Sci 2020; 21:ijms21030834. [PMID: 32012940 PMCID: PMC7037888 DOI: 10.3390/ijms21030834] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 01/21/2020] [Accepted: 01/23/2020] [Indexed: 12/25/2022] Open
Abstract
Maternal overweight in pregnancy alters the metabolic environment and generates chronic low-grade inflammation. This affects fetal development and programs the offspring’s health for developing cardiovascular and metabolic disease later in life. MME (membrane-metalloendopeptidase, neprilysin) cleaves various peptides regulating vascular tone. Endothelial cells express membrane-bound and soluble MME. In adults, the metabolic environment of overweight and obesity upregulates endothelial and circulating MME. We here hypothesized that maternal overweight increases MME in the feto-placental endothelium. We used primary feto-placental endothelial cells (fpEC) isolated from placentas after normal vs. overweight pregnancies and determined MME mRNA, protein, and release. Additionally, soluble cord blood MME was analyzed. The effect of oxygen and tumor necrosis factor α (TNFα) on MME protein in fpEC was investigated in vitro. Maternal overweight reduced MME mRNA (−39.9%, p < 0.05), protein (−42.5%, p = 0.02), and MME release from fpEC (−64.7%, p = 0.02). Both cellular and released MME protein negatively correlated with maternal pre-pregnancy BMI. Similarly, cord blood MME was negatively associated with pre-pregnancy BMI (r = −0.42, p = 0.02). However, hypoxia and TNFα, potential negative regulators of MME expression, did not affect MME protein. Reduction of MME protein in fpEC and in cord blood may alter the balance of vasoactive peptides. Our study highlights the fetal susceptibility to maternal metabolism and inflammatory state.
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