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Nardini P, Zizi V, Molino M, Fazi C, Calvani M, Carrozzo F, Giuseppetti G, Calosi L, Guasti D, Biagini D, Di Francesco F, Filippi L, Pini A. Protective Effects of Beta-3 Adrenoceptor Agonism on Mucosal Integrity in Hyperoxia-Induced Ileal Alterations. Antioxidants (Basel) 2024; 13:863. [PMID: 39061931 PMCID: PMC11273805 DOI: 10.3390/antiox13070863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 07/15/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024] Open
Abstract
Organogenesis occurs in the uterus under low oxygen levels (4%). Preterm birth exposes immature newborns to a hyperoxic environment, which can induce a massive production of reactive oxygen species and potentially affect organ development, leading to diseases such as necrotizing enterocolitis. The β3-adrenoreceptor (β3-AR) has an oxygen-dependent regulatory mechanism, and its activation exerts an antioxidant effect. To test the hypothesis that β3-AR could protect postnatal ileal development from the negative impact of high oxygen levels, Sprague-Dawley rat pups were raised under normoxia (21%) or hyperoxia (85%) for the first 2 weeks after birth and treated or not with BRL37344, a selective β3-AR agonist, at 1, 3, or 6 mg/kg. Hyperoxia alters ileal mucosal morphology, leading to increased cell lipid oxidation byproducts, reduced presence of β3-AR-positive resident cells, decreased junctional protein expression, disrupted brush border, mucin over-production, and impaired vascularization. Treatment with 3 mg/kg of BRL37344 prevented these alterations, although not completely, while the lower 1 mg/kg dose was ineffective, and the higher 6 mg/kg dose was toxic. Our findings indicate the potential of β3-AR agonism as a new therapeutic approach to counteract the hyperoxia-induced ileal alterations and, more generally, the disorders of prematurity related to supra-physiologic oxygen exposure.
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Affiliation(s)
- Patrizia Nardini
- Department of Experimental and Clinical Medicine, University of Florence, 50139 Florence, Italy; (P.N.); (V.Z.); (M.M.); (G.G.); (L.C.); (D.G.)
- Imaging Platform, Department Experimental and Clinical Medicine & Joint Laboratory with Department Biology, University of Florence, 50139 Florence, Italy
| | - Virginia Zizi
- Department of Experimental and Clinical Medicine, University of Florence, 50139 Florence, Italy; (P.N.); (V.Z.); (M.M.); (G.G.); (L.C.); (D.G.)
| | - Marta Molino
- Department of Experimental and Clinical Medicine, University of Florence, 50139 Florence, Italy; (P.N.); (V.Z.); (M.M.); (G.G.); (L.C.); (D.G.)
| | - Camilla Fazi
- Department of Pediatric, Meyer Children’s University Hospital, 50139 Florence, Italy;
| | - Maura Calvani
- Azienda Ospedaliera Universitaria Meyer, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), 50139 Florence, Italy;
| | - Francesco Carrozzo
- Department of Health Science, University of Florence, 50139 Florence, Italy;
| | - Giorgia Giuseppetti
- Department of Experimental and Clinical Medicine, University of Florence, 50139 Florence, Italy; (P.N.); (V.Z.); (M.M.); (G.G.); (L.C.); (D.G.)
| | - Laura Calosi
- Department of Experimental and Clinical Medicine, University of Florence, 50139 Florence, Italy; (P.N.); (V.Z.); (M.M.); (G.G.); (L.C.); (D.G.)
- Imaging Platform, Department Experimental and Clinical Medicine & Joint Laboratory with Department Biology, University of Florence, 50139 Florence, Italy
| | - Daniele Guasti
- Department of Experimental and Clinical Medicine, University of Florence, 50139 Florence, Italy; (P.N.); (V.Z.); (M.M.); (G.G.); (L.C.); (D.G.)
- Imaging Platform, Department Experimental and Clinical Medicine & Joint Laboratory with Department Biology, University of Florence, 50139 Florence, Italy
| | - Denise Biagini
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124 Pisa, Italy; (D.B.); (F.D.F.)
| | - Fabio Di Francesco
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124 Pisa, Italy; (D.B.); (F.D.F.)
| | - Luca Filippi
- Neonatology and Neonatal Intensive Care Unit, Department of Clinical and Experimental Medicine, University of Pisa, 56124 Pisa, Italy
| | - Alessandro Pini
- Department of Experimental and Clinical Medicine, University of Florence, 50139 Florence, Italy; (P.N.); (V.Z.); (M.M.); (G.G.); (L.C.); (D.G.)
- Imaging Platform, Department Experimental and Clinical Medicine & Joint Laboratory with Department Biology, University of Florence, 50139 Florence, Italy
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Miyoshi T, Vishwasrao H, Belyantseva I, Sajeevadathan M, Ishibashi Y, Adadey S, Harada N, Shroff H, Friedman T. Live-cell single-molecule fluorescence microscopy for protruding organelles reveals regulatory mechanisms of MYO7A-driven cargo transport in stereocilia of inner ear hair cells. RESEARCH SQUARE 2024:rs.3.rs-4369958. [PMID: 38826223 PMCID: PMC11142366 DOI: 10.21203/rs.3.rs-4369958/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Stereocilia are unidirectional F-actin-based cylindrical protrusions on the apical surface of inner ear hair cells and function as biological mechanosensors of sound and acceleration. Development of functional stereocilia requires motor activities of unconventional myosins to transport proteins necessary for elongating the F-actin cores and to assemble the mechanoelectrical transduction (MET) channel complex. However, how each myosin localizes in stereocilia using the energy from ATP hydrolysis is only partially understood. In this study, we develop a methodology for live-cell single-molecule fluorescence microscopy of organelles protruding from the apical surface using a dual-view light-sheet microscope, diSPIM. We demonstrate that MYO7A, a component of the MET machinery, traffics as a dimer in stereocilia. Movements of MYO7A are restricted when scaffolded by the plasma membrane and F-actin as mediated by MYO7A's interacting partners. Here, we discuss the technical details of our methodology and its future applications including analyses of cargo transportation in various organelles.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Thomas Friedman
- National Institute on Deafness and Other Communication Disorders, NIH
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Miyoshi T, Vishwasrao HD, Belyantseva IA, Sajeevadathan M, Ishibashi Y, Adadey SM, Harada N, Shroff H, Friedman TB. Live-cell single-molecule fluorescence microscopy for protruding organelles reveals regulatory mechanisms of MYO7A-driven cargo transport in stereocilia of inner ear hair cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.04.590649. [PMID: 38766013 PMCID: PMC11100596 DOI: 10.1101/2024.05.04.590649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Stereocilia are unidirectional F-actin-based cylindrical protrusions on the apical surface of inner ear hair cells and function as biological mechanosensors of sound and acceleration. Development of functional stereocilia requires motor activities of unconventional myosins to transport proteins necessary for elongating the F-actin cores and to assemble the mechanoelectrical transduction (MET) channel complex. However, how each myosin localizes in stereocilia using the energy from ATP hydrolysis is only partially understood. In this study, we develop a methodology for live-cell single-molecule fluorescence microscopy of organelles protruding from the apical surface using a dual-view light-sheet microscope, diSPIM. We demonstrate that MYO7A, a component of the MET machinery, traffics as a dimer in stereocilia. Movements of MYO7A are restricted when scaffolded by the plasma membrane and F-actin as mediated by MYO7A's interacting partners. Here, we discuss the technical details of our methodology and its future applications including analyses of cargo transportation in various organelles.
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Affiliation(s)
- Takushi Miyoshi
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, 20892, USA
- Division of Molecular and Integrative Physiology, Department of Biomedical Sciences, Southern Illinois University School of Medicine, Carbondale, IL, 62901, USA
| | - Harshad D. Vishwasrao
- Advanced Imaging and Microscopy Resource, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Inna A. Belyantseva
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Mrudhula Sajeevadathan
- Division of Molecular and Integrative Physiology, Department of Biomedical Sciences, Southern Illinois University School of Medicine, Carbondale, IL, 62901, USA
| | - Yasuko Ishibashi
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, 20892, USA
- Inner Ear Gene Therapy Program, National Institute on Deafness and Other Communication Disorders, National Institute of Health, Bethesda, Maryland 20892, USA
| | - Samuel M. Adadey
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Narinobu Harada
- Hearing Research Laboratory, Harada ENT Clinic, Higashi-Osaka, Osaka, 577-0816, Japan
| | - Hari Shroff
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, 20147, USA
| | - Thomas B. Friedman
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, 20892, USA
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Matoo S, Graves MJ, Choi MS, Idris RAES, Acharya P, Thapa G, Nguyen T, Atallah SY, Tipirneni AK, Stevenson PJ, Crawley SW. The microvillar protocadherin CDHR5 associates with EBP50 to promote brush border assembly. Mol Biol Cell 2024; 35:ar36. [PMID: 38170579 PMCID: PMC10916864 DOI: 10.1091/mbc.e23-02-0065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 10/27/2023] [Accepted: 12/22/2023] [Indexed: 01/05/2024] Open
Abstract
Transporting epithelial cells of the gut and kidney interact with their luminal environment through a densely packed collection of apical microvilli known as a brush border (BB). Proper brush border assembly depends on the intermicrovillar adhesion complex (IMAC), a protocadherin-based adhesion complex found at the distal tips of microvilli that mediates adhesion between neighboring protrusions to promote their organized packing. Loss of the IMAC adhesion molecule Cadherin-related family member 5 (CDHR5) results in significant brush border defects, though the functional properties of this protocadherin have not been thoroughly explored. Here, we show that the cytoplasmic tail of CDHR5 contributes to its correct apical targeting and functional properties in an isoform-specific manner. Library screening identified the Ezrin-associated scaffolds EBP50 and E3KARP as cytoplasmic binding partners for CDHR5. Consistent with this, loss of EBP50 disrupted proper brush border assembly with cells exhibiting markedly reduced apical IMAC levels. Together, our results shed light on the apical targeting determinants of CDHR5 and further define the interactome of the IMAC involved in brush border assembly.
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Affiliation(s)
- Samaneh Matoo
- Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | - Maura J. Graves
- Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | - Myoung Soo Choi
- Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | | | - Prashun Acharya
- Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | - Garima Thapa
- Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | - Tram Nguyen
- Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | - Sarah Y. Atallah
- Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | - Ashna K. Tipirneni
- Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
| | | | - Scott W. Crawley
- Department of Biological Sciences, University of Toledo, Toledo, Ohio 43606
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Xiu W, Ding W, Mou S, Li Y, Sultan Y, Ma J, Li X. Adverse effects of fenpropathrin on the intestine of common carp (Cyprinus carpio L.) and the mechanism involved. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 199:105799. [PMID: 38458669 DOI: 10.1016/j.pestbp.2024.105799] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/10/2024] [Accepted: 01/19/2024] [Indexed: 03/10/2024]
Abstract
Fenpropathrin (FEN), a pyrethroid pesticide, is frequently detected in natural water bodies, unavoidable pose adverse effects to aquatic organisms. However, the harmful effects and potential mechanisms of FEN on aquatic species are poorly understood. In this study, common carp were treatment with FEN at 0.45 and 1.35 μg/L for 14 d, and the toxic effects and underlying mechanisms of FEN on the intestine of carp were revealed. RNA-seq results showed that FEN exposure cause a wide range of transcriptional alterations in the intestine and the differentially expressed genes were mainly enrichment in the pathways related to immune and metabolism. Specifically, FEN exposure induced pathological damage and altered submicroscopic structure of the intestine, elevated the levels of Bacteroides fragilis enterotoxin, altered the contents of claudin-1, occludin, and zonula occluden-1 (ZO-1), and causing injury to the intestinal barrier. In addition, inflammation-related index TNF-α in the serum and IL-6 in the intestinal tissues were generally increased after FEN exposure. Moreover, FEN exposure promoted an increase in reactive oxygen species (ROS), altered the levels of superoxide dismutase (SOD), catalase (CAT), and glutathione (GSH), upregulated the contents of malondialdehyde (MDA) in the intestines. The apoptosis-related parameter cytochrome c, caspase-9, and caspase-3 were significantly altered, indicating that inflammation reaction, oxidative stress, and apoptosis may be involved in the toxic mechanism of FEN on carp. Moreover, FEN treatment also altered the intestinal flora community significantly, which may affect the intestinal normal physiological function and thus affect the growth of fish. Overall, the present study help to clarify the intestinal reaction mechanisms after FEN treatment, and provide a basis for the risk assessment of FEN.
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Affiliation(s)
- Wenyao Xiu
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China
| | - Weikai Ding
- Henan International Joint Laboratory of Aquatic Toxicology and Health Protection, Henan Normal University, Xinxiang, Henan 453007, China
| | - Shaoyu Mou
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yuanyuan Li
- Henan International Joint Laboratory of Aquatic Toxicology and Health Protection, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Yousef Sultan
- Department of Food Toxicology and Contaminants, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Junguo Ma
- College of Life Science, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Xiaoyu Li
- Henan International Joint Laboratory of Aquatic Toxicology and Health Protection, Henan Normal University, Xinxiang, Henan 453007, China
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