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Hawkins SJ, Gärtner Y, Offner T, Weiss L, Maiello G, Hassenklöver T, Manzini I. The olfactory network of larval Xenopus laevis regenerates accurately after olfactory nerve transection. Eur J Neurosci 2024; 60:3719-3741. [PMID: 38758670 DOI: 10.1111/ejn.16375] [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: 12/07/2023] [Revised: 04/10/2024] [Accepted: 04/14/2024] [Indexed: 05/19/2024]
Abstract
Across vertebrate species, the olfactory epithelium (OE) exhibits the uncommon feature of lifelong neuronal turnover. Epithelial stem cells give rise to new neurons that can adequately replace dying olfactory receptor neurons (ORNs) during developmental and adult phases and after lesions. To relay olfactory information from the environment to the brain, the axons of the renewed ORNs must reconnect with the olfactory bulb (OB). In Xenopus laevis larvae, we have previously shown that this process occurs between 3 and 7 weeks after olfactory nerve (ON) transection. In the present study, we show that after 7 weeks of recovery from ON transection, two functionally and spatially distinct glomerular clusters are reformed in the OB, akin to those found in non-transected larvae. We also show that the same odourant response tuning profiles observed in the OB of non-transected larvae are again present after 7 weeks of recovery. Next, we show that characteristic odour-guided behaviour disappears after ON transection but recovers after 7-9 weeks of recovery. Together, our findings demonstrate that the olfactory system of larval X. laevis regenerates with high accuracy after ON transection, leading to the recovery of odour-guided behaviour.
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Affiliation(s)
- Sara J Hawkins
- Institute of Animal Physiology, Department of Animal Physiology and Molecular Biomedicine, Justus Liebig University Gießen, Gießen, Germany
- School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK
| | - Yvonne Gärtner
- Institute of Animal Physiology, Department of Animal Physiology and Molecular Biomedicine, Justus Liebig University Gießen, Gießen, Germany
- School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine-Main Neuroscience Network (rmn2), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Thomas Offner
- Institute of Animal Physiology, Department of Animal Physiology and Molecular Biomedicine, Justus Liebig University Gießen, Gießen, Germany
| | - Lukas Weiss
- Institute of Animal Physiology, Department of Animal Physiology and Molecular Biomedicine, Justus Liebig University Gießen, Gießen, Germany
| | - Guido Maiello
- Department of Experimental Psychology, Justus Liebig University Gießen, Gießen, Germany
- School of Psychology, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK
| | - Thomas Hassenklöver
- Institute of Animal Physiology, Department of Animal Physiology and Molecular Biomedicine, Justus Liebig University Gießen, Gießen, Germany
| | - Ivan Manzini
- Institute of Animal Physiology, Department of Animal Physiology and Molecular Biomedicine, Justus Liebig University Gießen, Gießen, Germany
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Kikuta S, Nagayama S, Hasegawa-Ishii S. Structures and functions of the normal and injured human olfactory epithelium. Front Neural Circuits 2024; 18:1406218. [PMID: 38903957 PMCID: PMC11188711 DOI: 10.3389/fncir.2024.1406218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Accepted: 05/20/2024] [Indexed: 06/22/2024] Open
Abstract
The olfactory epithelium (OE) is directly exposed to environmental agents entering the nasal cavity, leaving OSNs prone to injury and degeneration. The causes of olfactory dysfunction are diverse and include head trauma, neurodegenerative diseases, and aging, but the main causes are chronic rhinosinusitis (CRS) and viral infections. In CRS and viral infections, reduced airflow due to local inflammation, inflammatory cytokine production, release of degranulated proteins from eosinophils, and cell injury lead to decreased olfactory function. It is well known that injury-induced loss of mature OSNs in the adult OE causes massive regeneration of new OSNs within a few months through the proliferation and differentiation of progenitor basal cells that are subsequently incorporated into olfactory neural circuits. Although normal olfactory function returns after injury in most cases, prolonged olfactory impairment and lack of improvement in olfactory function in some cases poses a major clinical problem. Persistent inflammation or severe injury in the OE results in morphological changes in the OE and respiratory epithelium and decreases the number of mature OSNs, resulting in irreversible loss of olfactory function. In this review, we discuss the histological structure and distribution of the human OE, and the pathogenesis of olfactory dysfunction associated with CRS and viral infection.
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Affiliation(s)
- Shu Kikuta
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, Nihon University, Tokyo, Japan
| | - Shin Nagayama
- Department of Neurobiology and Anatomy, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX, United States
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3
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Sipione R, Liaudet N, Rousset F, Landis BN, Hsieh JW, Senn P. Axonal Regrowth of Olfactory Sensory Neurons In Vitro. Int J Mol Sci 2023; 24:12863. [PMID: 37629041 PMCID: PMC10454582 DOI: 10.3390/ijms241612863] [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: 07/24/2023] [Revised: 08/11/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023] Open
Abstract
One of the most prevalent causes of olfactory loss includes traumatic brain injury with subsequent shearing of olfactory axons at the level of the cribriform plate (anterior skull base). Scar tissue at this level may prevent axonal regrowth toward the olfactory bulb. Currently, there is no cure for this debilitating and often permanent condition. One promising therapeutic concept is to implant a synthetic scaffold with growth factors through the cribriform plate/scar tissue to induce neuroregeneration. The first step toward this goal is to investigate the optimum conditions (growth factors, extracellular matrix proteins) to boost this regeneration. However, the lack of a specifically tailored in vitro model and an automated procedure for quantifying axonal length limits our ability to address this issue. The aim of this study is to create an automated quantification tool to measure axonal length and to determine the ideal growth factors and extracellular proteins to enhance axonal regrowth of olfactory sensory neurons in a mouse organotypic 2D model. We harvested olfactory epithelium (OE) of C57BL/6 mice and cultured them during 15 days on coverslips coated with various extracellular matrix proteins (Fibronectin, Collagen IV, Laminin, none) and different growth factors: fibroblast growth factor 2 (FGF2), brain-derived neurotrophic factor (BDNF), glial cell-derived neurotrophic factor (GDNF), nerve growth factor (NGF), retinoic acid (RA), transforming growth factor β (TGFβ), and none. We measured the attachment rate on coverslips, the presence of cellular and axonal outgrowth, and finally, the total axonal length with a newly developed automated high-throughput quantification tool. Whereas the coatings did not influence attachment and neuronal outgrowth rates, the total axonal length was enhanced on fibronectin and collagen IV (p = 0.001). The optimum growth factor supplementation media to culture OE compared to the control condition were as follows: FGF2 alone and FGF2 from day 0 to 7 followed by FGF2 in combination with NGF from day 7 to 15 (p < 0.0001). The automated quantification tool to measure axonal length outperformed the standard Neuron J application by reducing the average analysis time from 22 to 3 min per specimen. In conclusion, robust regeneration of murine olfactory neurons in vitro can be induced, controlled, and efficiently measured using an automated quantification tool. These results will help advance the therapeutic concept closer toward preclinical studies.
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Affiliation(s)
- Rebecca Sipione
- The Inner Ear and Olfaction Lab, Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (R.S.); (F.R.); (B.N.L.); (P.S.)
| | - Nicolas Liaudet
- Bioimaging Core Facility, Faculty of Medicine, University of Geneva, Rue Michel Servet 1, CH-1211 Geneva, Switzerland
| | - Francis Rousset
- The Inner Ear and Olfaction Lab, Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (R.S.); (F.R.); (B.N.L.); (P.S.)
| | - Basile N. Landis
- The Inner Ear and Olfaction Lab, Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (R.S.); (F.R.); (B.N.L.); (P.S.)
- Rhinology-Olfactology Unit, Department of Otorhinolaryngology—Head and Neck Surgery, Geneva University Hospitals, 4 Rue Gabrielle-Perret-Gentil, CH-1211 Geneva, Switzerland
| | - Julien Wen Hsieh
- The Inner Ear and Olfaction Lab, Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (R.S.); (F.R.); (B.N.L.); (P.S.)
- Rhinology-Olfactology Unit, Department of Otorhinolaryngology—Head and Neck Surgery, Geneva University Hospitals, 4 Rue Gabrielle-Perret-Gentil, CH-1211 Geneva, Switzerland
| | - Pascal Senn
- The Inner Ear and Olfaction Lab, Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Rue Michel Servet 1, CH-1211 Geneva, Switzerland; (R.S.); (F.R.); (B.N.L.); (P.S.)
- Rhinology-Olfactology Unit, Department of Otorhinolaryngology—Head and Neck Surgery, Geneva University Hospitals, 4 Rue Gabrielle-Perret-Gentil, CH-1211 Geneva, Switzerland
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Zunitch MJ, Fisch AS, Lin B, Barrios-Camacho CM, Faquin WC, Tachie-Baffour Y, Louie JD, Jang W, Curry WT, Gray ST, Lin DT, Schwob JE, Holbrook EH. Molecular Evidence for Olfactory Neuroblastoma as a Tumor of Malignant Globose Basal Cells. Mod Pathol 2023; 36:100122. [PMID: 36841178 PMCID: PMC10198888 DOI: 10.1016/j.modpat.2023.100122] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 01/20/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023]
Abstract
Olfactory neuroblastoma (ONB, esthesioneuroblastoma) is a sinonasal cancer with an underdeveloped diagnostic toolkit, and is the subject of many incidents of tumor misclassification throughout the literature. Despite its name, connections between the cancer and normal cells of the olfactory epithelium have not been systematically explored and markers of olfactory epithelial cell types are not deployed in clinical practice. Here, we utilize an integrated human-mouse single-cell atlas of the nasal mucosa, including the olfactory epithelium, to identify transcriptomic programs that link ONB to a specific population of stem/progenitor cells known as olfactory epithelial globose basal cells (GBCs). Expression of a GBC transcription factor NEUROD1 distinguishes both low- and high-grade ONB from sinonasal undifferentiated carcinoma, a potential histologic mimic with a distinctly unfavorable prognosis. Furthermore, we identify a reproducible subpopulation of highly proliferative ONB cells expressing the GBC stemness marker EZH2, suggesting that EZH2 inhibition may play a role in the targeted treatment of ONB. Finally, we study the cellular states comprising ONB parenchyma using single-cell transcriptomics and identify evidence of a conserved GBC transcriptional regulatory circuit that governs divergent neuronal-versus-sustentacular differentiation. These results link ONB to a specific cell type for the first time and identify conserved developmental pathways within ONB that inform diagnostic, prognostic, and mechanistic investigation.
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Affiliation(s)
- Matthew J Zunitch
- Medical Scientist Training Program, Tufts University School of Medicine, Boston, Massachusetts; Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts
| | - Adam S Fisch
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Brian Lin
- Center for Regenerative Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | | | - William C Faquin
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Yaw Tachie-Baffour
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts
| | - Jonathan D Louie
- Medical Scientist Training Program, Tufts University School of Medicine, Boston, Massachusetts; Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts
| | - Woochan Jang
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts
| | - William T Curry
- Department of Neurosurgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Stacey T Gray
- Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts
| | - Derrick T Lin
- Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts
| | - James E Schwob
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts; Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts.
| | - Eric H Holbrook
- Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts.
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Sakatani H, Kono M, Shiga T, Kuwazoe H, Nanushaj D, Matsuzaki I, Murata SI, Miyajima M, Okada Y, Saika S, Hotomi M. The Roles of Transient Receptor Potential Vanilloid 1 and 4 in Olfactory Regeneration. J Transl Med 2023; 103:100051. [PMID: 36870285 DOI: 10.1016/j.labinv.2022.100051] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 11/06/2022] [Accepted: 12/14/2022] [Indexed: 01/15/2023] Open
Abstract
Olfactory disorders, which are closely related to cognitive deterioration, can be caused by several factors, including infections, such as COVID-19; aging; and environmental chemicals. Injured olfactory receptor neurons (ORNs) regenerate after birth, but it is unclear which receptors and sensors are involved in ORN regeneration. Recently, there has been great focus on the involvement of transient receptor potential vanilloid (TRPV) channels, which are nociceptors expressed on sensory nerves during the healing of damaged tissues. The localization of TRPV in the olfactory nervous system has been reported in the past, but its function there are unclear. Here, we investigated how TRPV1 and TRPV4 channels are involved in ORN regeneration. TRPV1 knockout (KO), TRPV4 KO, and wild-type (WT) mice were used to model methimazole-induced olfactory dysfunction. The regeneration of ORNs was evaluated using olfactory behavior, histologic examination, and measurement of growth factors. Both TRPV1 and TRPV4 were found to be expressed in the olfactory epithelium (OE). TRPV1, in particular, existed near ORN axons. TRPV4 was marginally expressed in the basal layer of the OE. The proliferation of ORN progenitor cells was reduced in TRPV1 KO mice, which delayed ORN regeneration and the improvement of olfactory behavior. Postinjury OE thickness improved faster in TRPV4 KO mice than WT mice but without acceleration of ORN maturation. The nerve growth factor and transforming growth factor ß levels in TRPV1 KO mice were similar to those in WT mice, and the transforming growth factor ß level was higher than TRPV4 KO mice. TRPV1 was involved in stimulating the proliferation of progenitor cells. TRPV4 modulated their proliferation and maturation. ORN regeneration was regulated by the interaction between TRPV1 and TRPV4. However, in this study, TRPV4 involvement was limited compared with TRPV1. To our knowledge, this is the first study to demonstrate the involvement of TRPV1 and TRPV4 in OE regeneration.
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Affiliation(s)
- Hideki Sakatani
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Wakayama, Japan
| | - Masamitsu Kono
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Wakayama, Japan
| | - Tatsuya Shiga
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Wakayama, Japan
| | - Hiroki Kuwazoe
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Wakayama, Japan
| | - Denisa Nanushaj
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Wakayama, Japan
| | - Ibu Matsuzaki
- Department of Human Pathology, Wakayama Medical University, Wakayama, Japan
| | - Shin-Ichi Murata
- Department of Human Pathology, Wakayama Medical University, Wakayama, Japan
| | - Masayasu Miyajima
- Department of Ophthalmology, Wakayama Medical University, Wakayama, Japan
| | - Yuka Okada
- Department of Ophthalmology, Wakayama Medical University, Wakayama, Japan
| | - Shizuya Saika
- Department of Ophthalmology, Wakayama Medical University, Wakayama, Japan
| | - Muneki Hotomi
- Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Wakayama, Japan.
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6
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Ozdener MH, Rockx B, Rawson NE. Primary Culture of the Human Olfactory Neuroepithelium and Utilization for Henipavirus Infection In Vitro. Methods Mol Biol 2023; 2682:121-133. [PMID: 37610578 DOI: 10.1007/978-1-0716-3283-3_9] [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] [Indexed: 08/24/2023]
Abstract
The olfactory receptor neurons (ORNs) are a unique cell type involved in the initial perception of odors. These specialized epithelial cells are located in the neuroepithelium of the nasal cavities and directly connect the nasal cavity with the central nervous system (CNS) via axons, which traverse the cribriform plate to synapse within the olfactory bulb. ORNs are derived from precursor cells that lie adjacent to the basal lamina of the olfactory epithelium. These precursor cells divide several times and their progeny differentiate into mature sensory neurons throughout life. In addition to its major and critical role in sensory transduction, the olfactory neuroepithelium may be an important tissue for viral replication and represents a potential site for viral entry into the CNS. In general, to gain access to the CNS, neurotropic viruses such as henipaviruses can use peripheral neural pathways or the circulatory system. However, the olfactory system has been reported to provide a portal of entry to the CNS for henipaviruses. The ability to obtain biopsies from living human subjects and culture these cells in the laboratory provides the opportunity to examine viral replication and effects on a neuronal cell population. As the most exposed and unprotected segment of the nervous system, the olfactory neuroepithelium may have an important role in neuropathology and systemic dissemination of viruses with established CNS effects. This chapter presents methods for primary culture of human ORNs, which have been used successfully by multiple investigators. The protocol provides a consistent, heterogeneous olfactory epithelial cell population, which demonstrates functional responses to odorant mixtures and exhibits several key features of the olfactory receptor neuron phenotype, encompassing olfactory receptors and signaling pathways.
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Affiliation(s)
| | - Barry Rockx
- Wageningen Bioveterinary Institute, Lelystad and Department of Viroscience, Erasmus University Medical Center, Rotterdam, The Netherlands
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Huang JS, Kunkhyen T, Rangel AN, Brechbill TR, Gregory JD, Winson-Bushby ED, Liu B, Avon JT, Muggleton RJ, Cheetham CEJ. Immature olfactory sensory neurons provide behaviourally relevant sensory input to the olfactory bulb. Nat Commun 2022; 13:6194. [PMID: 36261441 PMCID: PMC9582225 DOI: 10.1038/s41467-022-33967-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 10/07/2022] [Indexed: 01/12/2023] Open
Abstract
Postnatal neurogenesis provides an opportunity to understand how newborn neurons integrate into circuits to restore function. Newborn olfactory sensory neurons (OSNs) wire into highly organized olfactory bulb (OB) circuits throughout life, enabling lifelong plasticity and regeneration. Immature OSNs form functional synapses capable of evoking firing in OB projection neurons but what contribution, if any, they make to odor processing is unknown. Here, we show that immature OSNs provide odor input to the mouse OB, where they form monosynaptic connections with excitatory neurons. Importantly, immature OSNs respond as selectively to odorants as mature OSNs and exhibit graded responses across a wider range of odorant concentrations than mature OSNs, suggesting that immature and mature OSNs provide distinct odor input streams. Furthermore, mice can successfully perform odor detection and discrimination tasks using sensory input from immature OSNs alone. Together, our findings suggest that immature OSNs play a previously unappreciated role in olfactory-guided behavior.
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Affiliation(s)
- Jane S Huang
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA
| | - Tenzin Kunkhyen
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA
| | - Alexander N Rangel
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA
| | - Taryn R Brechbill
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA
| | - Jordan D Gregory
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA
| | - Emily D Winson-Bushby
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA
| | - Beichen Liu
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Jonathan T Avon
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA
| | - Ryan J Muggleton
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA
| | - Claire E J Cheetham
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St, Pittsburgh, PA, 15232, USA.
- Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA.
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Bigdai EV, Samoilov VO. Role of Neurotransmitters in the Functioning of Olfactory Sensory Neurons. J EVOL BIOCHEM PHYS+ 2022. [DOI: 10.1134/s0022093022030206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Miah M, Ferretti P, Choi D. Considering the Cellular Composition of Olfactory Ensheathing Cell Transplants for Spinal Cord Injury Repair: A Review of the Literature. Front Cell Neurosci 2021; 15:781489. [PMID: 34867207 PMCID: PMC8635789 DOI: 10.3389/fncel.2021.781489] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 10/26/2021] [Indexed: 12/23/2022] Open
Abstract
Olfactory ensheathing cells (OECs) are specialized glia cells of the olfactory system that support the continual regeneration of olfactory neurons throughout adulthood. Owing to their pro-regenerative properties, OECs have been transplanted in animal models of spinal cord injuries (SCI) and trialed in clinical studies on SCI patients. Although these studies have provided convincing evidence to support the continued development of OEC transplantation as a treatment option for the repair of SCI, discrepancies in the reported outcome has shown that OEC transplantation requires further improvement. Much of the variability in the reparative potential of OEC transplants is due to the variations in the cell composition of transplants between studies. As a result, the optimal cell preparation is currently a subject of debate. Here we review, the characterization as well as the effect of the cell composition of olfactory cell transplantation on therapeutic outcome in SCI. Firstly, we summarize and review the cell composition of olfactory cell preparations across the different species studied prior to transplantation. Since the purity of cells in olfactory transplants might affect the study outcome we also examine the effect of the proportions of OECs and the different cell types identified in the transplant on neuroregeneration. Finally, we consider the effect of the yield of cells on neuroregeneration by assessing the cell dose of transplants on therapeutic outcome.
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Affiliation(s)
- Mahjabeen Miah
- Spinal Repair Unit, Department of Brain Repair and Rehabilitation, UCL Queen Square Institute of Neurology, London, United Kingdom
| | - Patrizia Ferretti
- Developmental Biology and Cancer Department, UCL Great Ormond Street Institute of Child Health, London, United Kingdom
| | - David Choi
- Spinal Repair Unit, Department of Brain Repair and Rehabilitation, UCL Queen Square Institute of Neurology, London, United Kingdom
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Analyzing Olfactory Neuron Precursors Non-Invasively Isolated through NADH FLIM as a Potential Tool to Study Oxidative Stress in Alzheimer's Disease. Int J Mol Sci 2021; 22:ijms22126311. [PMID: 34204595 PMCID: PMC8231156 DOI: 10.3390/ijms22126311] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/29/2021] [Accepted: 04/29/2021] [Indexed: 12/22/2022] Open
Abstract
Among all the proposed pathogenic mechanisms to understand the etiology of Alzheimer’s disease (AD), increased oxidative stress seems to be a robust and early disease feature where many of those hypotheses converge. However, despite the significant lines of evidence accumulated, an effective diagnosis and treatment of AD are not yet available. This limitation might be partially explained by the use of cellular and animal models that recapitulate partial aspects of the disease and do not account for the particular biology of patients. As such, cultures of patient-derived cells of peripheral origin may provide a convenient solution for this problem. Peripheral cells of neuronal lineage such as olfactory neuronal precursors (ONPs) can be easily cultured through non-invasive isolation, reproducing AD-related oxidative stress. Interestingly, the autofluorescence of key metabolic cofactors such as reduced nicotinamide adenine dinucleotide (NADH) can be highly correlated with the oxidative state and antioxidant capacity of cells in a non-destructive and label-free manner. In particular, imaging NADH through fluorescence lifetime imaging microscopy (FLIM) has greatly improved the sensitivity in detecting oxidative shifts with minimal intervention to cell physiology. Here, we discuss the translational potential of analyzing patient-derived ONPs non-invasively isolated through NADH FLIM to reveal AD-related oxidative stress. We believe this approach may potentially accelerate the discovery of effective antioxidant therapies and contribute to early diagnosis and personalized monitoring of this devastating disease.
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Håglin S, Bohm S, Berghard A. Single or Repeated Ablation of Mouse Olfactory Epithelium by Methimazole. Bio Protoc 2021; 11:e3983. [PMID: 34124287 DOI: 10.21769/bioprotoc.3983] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 01/18/2021] [Accepted: 01/25/2021] [Indexed: 11/02/2022] Open
Abstract
Odor-detecting olfactory sensory neurons residing in the nasal olfactory epithelium (OE) are the only neurons in direct contact with the external environment. As a result, these neurons are subjected to chemical, physical, and infectious insults, which may be the underlying reason why neurogenesis occurs in the OE of adult mammals. This feature makes the OE a useful model for studying neurogenesis and neuronal differentiation, with the possibility for systemic as well as local administration of various compounds and infectious agents that may interfere with these cellular processes. Several different chemical compounds have been shown to cause toxic injury to the OE, which can be used for OE ablation. We, and others, have found that the systemic administration of the hyperthyroid drug, methimazole, reliably causes olfactotoxicity as a side effect. Here, we outline an OE lesioning protocol for single or repeated ablation by methimazole. A single methimazole administration can be used to study neuroepithelial regeneration and stem cell activation, while repeated ablation and regeneration of OE enable the study of tissue stem cell exhaustion and generation of tissue metaplasia.
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Affiliation(s)
- Sofia Håglin
- Department of Molecular Biology, Umeå University, Umeå, Sweden
| | - Staffan Bohm
- Department of Molecular Biology, Umeå University, Umeå, Sweden
| | - Anna Berghard
- Department of Molecular Biology, Umeå University, Umeå, Sweden
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12
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Abstract
Currently, most cellular therapeutic effects for nervous diseases cannot be proven in a multicenter, randomized, double-blind placebo-control clinical trials, except for a few kinds of cells such as olfactory ensheathing cells. These cells show significant improvements in functional recovery and quality of life for patients with chronic ischemic stroke. Also, olfactory neuron transplantation has promising neurorestorative effects on patients with vascular dementia. Human olfactory neuroepithelium can spontaneously and sustainably regenerate or produce new olfactory neurons and glial cell types for decades or a lifetime. The neurorestorative mechanisms of olfactory ensheathing cells are well known; however, little is known about the neurorestorative mechanisms of olfactory neurons. Therefore, I hypothesize that the neurorestorative mechanisms of olfactory neurons after transplantation: (1) can well migrate where they are needed and become local functional neurons, as they need to compensate or replace; (2) must be regulated by some special molecular factors to elongate their axons, modulate or direct synapses to correctly recognize and connect the target cells, and integrate functions. Based on olfactory neuroepithelium cells displaying the special characterization, neurorestorative mechanisms, clinical therapeutic achievements, and hypotheses of effective mechanisms, they (olfactory ensheathing cells and olfactory neurons) may be the most efficient instruments of neurorestoration.
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Delgado-Sequera A, Hidalgo-Figueroa M, Barrera-Conde M, Duran-Ruiz MC, Castro C, Fernández-Avilés C, de la Torre R, Sánchez-Gomar I, Pérez V, Geribaldi-Doldán N, Robledo P, Berrocoso E. Olfactory Neuroepithelium Cells from Cannabis Users Display Alterations to the Cytoskeleton and to Markers of Adhesion, Proliferation and Apoptosis. Mol Neurobiol 2020; 58:1695-1710. [PMID: 33237429 DOI: 10.1007/s12035-020-02205-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/09/2020] [Indexed: 12/26/2022]
Abstract
Cannabis is the third most commonly used psychoactive substance of abuse, yet it also receives considerable attention as a potential therapeutic drug. Therefore, it is essential to fully understand the actions of cannabis in the human brain. The olfactory neuroepithelium (ON) is a peripheral nervous tissue that represents an interesting surrogate model to study the effects of drugs in the brain, since it is closely related to the central nervous system, and sensory olfactory neurons are continually regenerated from populations of stem/progenitor cells that undergo neurogenesis throughout life. In this study, we used ON cells from chronic cannabis users and healthy control subjects to assess alterations in relevant cellular processes, and to identify changes in functional proteomic pathways due to cannabis consumption. The ON cells from cannabis users exhibited alterations in the expression of proteins that were related to the cytoskeleton, cell proliferation and cell death, as well as, changes in proteins implicated in cancer, gastrointestinal and neurodevelopmental pathologies. Subsequent studies showed cannabis provoked an increase in cell size and morphological alterations evident through β-Tubulin III staining, as well as, enhanced beta-actin expression and a decrease in the ability of ON cells to undergo cell attachment, suggesting abnormalities of the cytoskeleton and cell adhesion system. Furthermore, these cells proliferated more and underwent less cell death. Our results indicate that cannabis may alter key processes of the developing brain, some of which are similar to those reported in mental disorders like DiGeorge syndrome, schizophrenia and bipolar disorder.
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Affiliation(s)
- Alejandra Delgado-Sequera
- Neuropsychopharmacology and Psychobiology Research Group, Department of Psychology, University of Cádiz, Campus Universitario Río San Pedro s/n, 11510, Puerto Real, Cadiz, Spain
- Instituto de Investigación e Innovación Biomédica de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
| | - María Hidalgo-Figueroa
- Neuropsychopharmacology and Psychobiology Research Group, Department of Psychology, University of Cádiz, Campus Universitario Río San Pedro s/n, 11510, Puerto Real, Cadiz, Spain
- Instituto de Investigación e Innovación Biomédica de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain
| | - Marta Barrera-Conde
- Integrative Pharmacology and Systems Neuroscience, Neurosciences Research Programme, IMIM-Hospital del Mar Research Institute, PRBB, Calle Dr. Aiguader 88, 08003, Barcelona, Spain
- Department of Experimental and Health Sciences, University Pompeu Fabra, Barcelona, Spain
| | - Mª Carmen Duran-Ruiz
- Instituto de Investigación e Innovación Biomédica de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
- Biomedicine, Biotechnology and Public Health Department, University of Cádiz, Cádiz, Spain
| | - Carmen Castro
- Instituto de Investigación e Innovación Biomédica de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
- Biomedicine, Biotechnology and Public Health Department, University of Cádiz, Cádiz, Spain
| | | | - Rafael de la Torre
- Integrative Pharmacology and Systems Neuroscience, Neurosciences Research Programme, IMIM-Hospital del Mar Research Institute, PRBB, Calle Dr. Aiguader 88, 08003, Barcelona, Spain
- Biomedicine, Biotechnology and Public Health Department, University of Cádiz, Cádiz, Spain
- Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, Madrid, Spain
| | - Ismael Sánchez-Gomar
- Instituto de Investigación e Innovación Biomédica de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
- Biomedicine, Biotechnology and Public Health Department, University of Cádiz, Cádiz, Spain
| | - Víctor Pérez
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain
- Neuropsychiatry and Addictions Institute (INAD) of Parc de Salut Mar, Barcelona, Spain
| | - Noelia Geribaldi-Doldán
- Instituto de Investigación e Innovación Biomédica de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
- Department of Human Anatomy and Embriology, University of Cádiz, Cádiz, Spain
| | - Patricia Robledo
- Integrative Pharmacology and Systems Neuroscience, Neurosciences Research Programme, IMIM-Hospital del Mar Research Institute, PRBB, Calle Dr. Aiguader 88, 08003, Barcelona, Spain.
- Department of Experimental and Health Sciences, University Pompeu Fabra, Barcelona, Spain.
| | - Esther Berrocoso
- Neuropsychopharmacology and Psychobiology Research Group, Department of Psychology, University of Cádiz, Campus Universitario Río San Pedro s/n, 11510, Puerto Real, Cadiz, Spain.
- Instituto de Investigación e Innovación Biomédica de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain.
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain.
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Bhattacharjee AS, Joshi SV, Naik S, Sangle S, Abraham NM. Quantitative assessment of olfactory dysfunction accurately detects asymptomatic COVID-19 carriers. EClinicalMedicine 2020; 28:100575. [PMID: 33083773 PMCID: PMC7562772 DOI: 10.1016/j.eclinm.2020.100575] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/16/2020] [Accepted: 09/17/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND COVID-19 threatens the global community because a large fraction of infected people are asymptomatic, yet can effectively transmit SARS-CoV-2. Finding and isolating these silent carriers is a crucial step in confining the spread of the disease. A sudden loss of the sense of smell has been self-reported by COVID-19 patients across different countries, consistent with expression of the molecular factors mediating SARS-CoV-2 uptake into human olfactory epithelial supporting cells. However, precise quantification of olfactory loss in asymptomatic COVID-19 carriers is missing to date. METHODS To quantify olfactory functions in asymptomatic COVID-19 patients, we designed an olfactory-action meter that determines detectability indices at different odor concentrations and an olfactory matching accuracy score using monomolecular odors. The optimization of test parameters allowed us to reliably and accurately assess olfactory deficits in a patient within 20 minutes. FINDINGS Measurement of detection indices at low concentrations revealed a 50% reduction in asymptomatic COVID-19 carriers. Further, patients with better detection scores showed significantly reduced olfactory matching accuracies compared to normal healthy subjects. Our quantification of olfactory loss, considering all parameters, identified 82% of the asymptomatic SARS-CoV-2 carriers with olfactory deficits. However, on subjective evaluation, only 15% of the patients noticed a compromised ability to smell. INTERPRETATION Compromised olfactory fitness can serve as a strong basis for identifying asymptomatic COVID-19 patients. Detailed design specifications and protocols provided here should enable the development of a sensitive, fast, and economical screening strategy that can be administered to large populations to prevent the rapid spread of COVID-19. FUNDING This work was supported by the DBT - Wellcome Trust India Alliance intermediate grant (IA/I/14/1/501,306 to N.A.) and UGC NET Fellowship (A.B.). All the funding sources played no roles in the study.
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Affiliation(s)
| | - Samir V. Joshi
- Byramjee Jeejeebhoy Government Medical College and Sassoon General Hospitals (BJGMC & SGH), Pune, Maharashtra, 411001, India
| | - Shilpa Naik
- Byramjee Jeejeebhoy Government Medical College and Sassoon General Hospitals (BJGMC & SGH), Pune, Maharashtra, 411001, India
| | - Shashikala Sangle
- Byramjee Jeejeebhoy Government Medical College and Sassoon General Hospitals (BJGMC & SGH), Pune, Maharashtra, 411001, India
| | - Nixon M. Abraham
- Indian Institute of Science Education and Research (IISER), Pune, Maharashtra, 411008, India
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15
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Valinhas A, Santiago-Toledo G, Wall IB. Microcarrier expansion of c-MycER TAM -modified human olfactory mucosa cells for neural regeneration. Biotechnol Bioeng 2020; 118:329-344. [PMID: 32955111 DOI: 10.1002/bit.27573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 08/21/2020] [Accepted: 09/12/2020] [Indexed: 11/09/2022]
Abstract
Human olfactory mucosa cells (hOMCs) have potential as a regenerative therapy for spinal cord injury. In our earlier work, we derived PA5 cells, a polyclonal population that retains functional attributes of primary human OMCs. Microcarrier suspension culture is an alternative to planar two-dimensinal culture to produce cells in quantities that can meet the needs of clinical development. This study aimed to screen the effects of 10 microcarriers on PA5 hOMCs yield and phenotype. Studies performed in well plates led to a 2.9-fold higher cell yield on plastic compared to plastic plus microcarriers with upregulation of neural markers β-III tubulin and nestin for both conditions. Microcarrier suspension culture resulted in concentrations of 1.4 × 105 cells/ml and 4.9 × 104 cells/ml for plastic and plastic plus, respectively, after 7 days. p75NTR transcript was significantly upregulated for PA5 hOMCs grown on Plastic Plus compared to Plastic. Furthermore, coculture of PA5 hOMCs grown on Plastic Plus with a neuronal cell line (NG108-15) led to increased neurite outgrowth. This study shows successful expansion of PA5 cells using suspension culture on microcarriers, and it reveals competing effects of microcarriers on cell expansion versus functional attributes, showing that designing scalable bioprocesses should not only be driven by cell yields.
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Affiliation(s)
- Ana Valinhas
- Department of Biochemical Engineering, University College London, London, UK
| | | | - Ivan B Wall
- Department of Biochemical Engineering, University College London, London, UK.,College of Life and Health Sciences, Aston University, Birmingham, UK.,Department of Nanobiomedical Science, Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, South Korea
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16
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Kondo K, Kikuta S, Ueha R, Suzukawa K, Yamasoba T. Age-Related Olfactory Dysfunction: Epidemiology, Pathophysiology, and Clinical Management. Front Aging Neurosci 2020; 12:208. [PMID: 32733233 PMCID: PMC7358644 DOI: 10.3389/fnagi.2020.00208] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/12/2020] [Indexed: 12/21/2022] Open
Abstract
Like other sensory systems, olfactory function deteriorates with age. Epidemiological studies have revealed that the incidence of olfactory dysfunction increases at the age of 60 and older and males are more affected than females. Moreover, smoking, heavy alcohol use, sinonasal diseases, and Down’s syndrome are associated with an increased incidence of olfactory dysfunction. Although the pathophysiology of olfactory dysfunction in humans remains largely unknown, studies in laboratory animals have demonstrated that both the peripheral and central olfactory nervous systems are affected by aging. Aged olfactory neuroepithelium in the nasal cavity shows the loss of mature olfactory neurons, replacement of olfactory neuroepithelium by respiratory epithelium, and a decrease in basal cell proliferation both in the normal state and after injury. In the central olfactory pathway, a decrease in the turnover of interneurons in the olfactory bulb (OB) and reduced activity in the olfactory cortex under olfactory stimulation is observed. Recently, the association between olfactory impairment and neurodegenerative diseases, such as Alzheimer’s disease (AD) and Parkinson’s disease (PD), has gained attention. Evidence-based pharmacotherapy to suppress or improve age-related olfactory dysfunction has not yet been established, but preliminary results suggest that olfactory training using odorants may be useful to improve some aspects of age-related olfactory impairment.
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Affiliation(s)
- Kenji Kondo
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shu Kikuta
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Rumi Ueha
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Keigo Suzukawa
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tatsuya Yamasoba
- Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, Tokyo, Japan
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17
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Rodriguez S, Cao L, Rickenbacher GT, Benz EG, Magdamo C, Gomez LR, Holbrook EH, Albers AD, Gallagher R, Westover MB, Evans KE, Tatar DJ, Mukerji S, Zafonte R, Boyer EW, Yu CR, Albers MW. Innate immune signaling in the olfactory epithelium reduces odorant receptor levels: modeling transient smell loss in COVID-19 patients. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2020:2020.06.14.20131128. [PMID: 32587994 PMCID: PMC7310652 DOI: 10.1101/2020.06.14.20131128] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Post-infectious anosmias typically follow death of olfactory sensory neurons (OSNs) with a months-long recovery phase associated with parosmias. While profound anosmia is the leading symptom associated with COVID-19 infection, many patients regain olfactory function within days to weeks without distortions. Here, we demonstrate that sterile induction of anti-viral type I interferon signaling in the mouse olfactory epithelium is associated with diminished odor discrimination and reduced odor-evoked local field potentials. RNA levels of all class I, class II, and TAAR odorant receptors are markedly reduced in OSNs in a non-cell autonomous manner. We find that people infected with COVID-19 rate odors with lower intensities and have odor discrimination deficits relative to people that tested negative for COVID-19. Taken together, we propose that inflammatory-mediated loss of odorant receptor expression with preserved circuit integrity accounts for the profound anosmia and rapid recovery of olfactory function without parosmias caused by COVID-19.
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Affiliation(s)
- Steven Rodriguez
- Dept. of Neurology, Massachusetts General Hospital, Boston, MA 02129
| | - Luxiang Cao
- Dept. of Neurology, Massachusetts General Hospital, Boston, MA 02129
| | | | - Eric G. Benz
- Dept. of Neurology, Massachusetts General Hospital, Boston, MA 02129
| | - Colin Magdamo
- Dept. of Neurology, Massachusetts General Hospital, Boston, MA 02129
| | | | - Eric H. Holbrook
- Dept. of Otolaryngology—Head and Neck Surgery, Mass. Eye and Ear, Boston, MA 02114
| | - Alefiya D. Albers
- Dept. of Neurology, Massachusetts General Hospital, Boston, MA 02129
- Dept. of Psychology, Endicott College, Beverly, MA 01915
| | - Rose Gallagher
- Dept. of Neurology, Massachusetts General Hospital, Boston, MA 02129
| | | | - Kyle E. Evans
- Dept. of Neurology, Massachusetts General Hospital, Boston, MA 02129
| | | | - Shibani Mukerji
- Dept. of Neurology, Massachusetts General Hospital, Boston, MA 02129
| | - Ross Zafonte
- Dept. of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Boston, MA 02129
| | - Edward W Boyer
- Dept. of Emergency Medicine, Brigham and Women’s Hospital, Boston, MA 02115
| | - C. Ron Yu
- Stowers Institute of Medical Research, Kansas City, MO 64110
| | - Mark W. Albers
- Dept. of Neurology, Massachusetts General Hospital, Boston, MA 02129
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18
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Wood R, Durali P, Wall I. Impact of Dual Cell Co-culture and Cell-conditioned Media on Yield and Function of a Human Olfactory Cell Line for Regenerative Medicine. Bioengineering (Basel) 2020; 7:bioengineering7020037. [PMID: 32290611 PMCID: PMC7355638 DOI: 10.3390/bioengineering7020037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/05/2020] [Accepted: 04/10/2020] [Indexed: 02/06/2023] Open
Abstract
Olfactory ensheathing cells (OECs) are a promising candidate therapy for neuronal tissue repair. However, appropriate priming conditions to drive a regenerative phenotype are yet to be determined. We first assessed the effect of using a human fibroblast feeder layer and fibroblast conditioned media on primary rat olfactory mucosal cells (OMCs). We found that OMCs cultured on fibroblast feeders had greater expression of the key OEC marker p75NTR (25.1 ± 10.7 cells/mm2) compared with OMCs cultured on laminin (4.0 ± 0.8 cells/mm2, p = 0.001). However, the addition of fibroblast-conditioned media (CM) resulted in a significant increase in Thy1.1 (45.9 ± 9.0 cells/mm2 versus 12.5 ± 2.5 cells/mm2 on laminin, p = 0.006), an undesirable cell marker as it is regarded to be a marker of contaminating fibroblasts. A direct comparison between human feeders and GMP cell line Ms3T3 was then undertaken. Ms3T3 cells supported similar p75NTR levels (10.7 ± 5.3 cells/mm2) with significantly reduced Thy1.1 expression (4.8 ± 2.1 cells/mm2). Ms3T3 cells were used as feeder layers for human OECs to determine whether observations made in the rat model were conserved. Examination of the OEC phenotype (S100β expression and neurite outgrowth from NG108-15 cells) revealed that co-culture with fibroblast feeders had a negative effect on human OECs, contrary to observations of rat OECs. CM negatively affected rat and human OECs equally. When the best and worst conditions in terms of supporting S100β expression were used in NG108-15 neuron co-cultures, those with the highest S100β expression resulted in longer and more numerous neurites (22.8 ± 2.4 μm neurite length/neuron for laminin) compared with the lowest S100β expression (17.9 ± 1.1 μm for Ms3T3 feeders with CM). In conclusion, this work revealed that neither dual co-culture nor fibroblast-conditioned media support the regenerative OEC phenotype. In our case, a preliminary rat model was not predictive of human cell responses.
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Affiliation(s)
- Rachael Wood
- Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK; (R.W.); (P.D.)
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Pelin Durali
- Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK; (R.W.); (P.D.)
| | - Ivan Wall
- Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK; (R.W.); (P.D.)
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 31116, Korea
- Correspondence:
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19
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Durante MA, Kurtenbach S, Sargi ZB, Harbour JW, Choi R, Kurtenbach S, Goss GM, Matsunami H, Goldstein BJ. Single-cell analysis of olfactory neurogenesis and differentiation in adult humans. Nat Neurosci 2020; 23:323-326. [PMID: 32066986 PMCID: PMC7065961 DOI: 10.1038/s41593-020-0587-9] [Citation(s) in RCA: 134] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 01/03/2020] [Indexed: 01/26/2023]
Abstract
The presence of active neurogenic niches in adult humans is controversial. We focused attention to the human olfactory neuroepithelium, an extracranial site supplying input to the olfactory bulbs of the brain. Using single-cell RNA sequencing analyzing 28,726 cells, we identified neural stem cell and neural progenitor cell pools and neurons. Additionally, we detailed the expression of 140 olfactory receptors. These data from the olfactory neuroepithelium niche provide evidence that neuron production may continue for decades in humans.
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Affiliation(s)
- Michael A Durante
- Medical Scientist Training Program, University of Miami Miller School of Medicine, Miami, FL, USA
- Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Stefan Kurtenbach
- Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Zoukaa B Sargi
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - J William Harbour
- Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Rhea Choi
- Medical Scientist Training Program, University of Miami Miller School of Medicine, Miami, FL, USA
- Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Graduate Program in Neuroscience, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Sarah Kurtenbach
- Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Garrett M Goss
- Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Hiroaki Matsunami
- Department of Molecular Genetics and Microbiology, Duke Institute for Brain Sciences, Duke University Medical Center, Durham, NC, USA
- Department of Neurobiology, Duke Institute for Brain Sciences, Duke University Medical Center, Durham, NC, USA
| | - Bradley J Goldstein
- Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, USA.
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL, USA.
- Graduate Program in Neuroscience, University of Miami Miller School of Medicine, Miami, FL, USA.
- Department of Head and Neck Surgery & Communication Sciences, Duke University Medical Center, Durham, NC, USA.
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Human olfactory mesenchymal stromal cells co-expressing horizontal basal and ensheathing cell proteins in culture. ACTA ACUST UNITED AC 2020; 40:72-88. [PMID: 32220165 PMCID: PMC7357377 DOI: 10.7705/biomedica.4762] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Indexed: 12/18/2022]
Abstract
Introduction: The olfactory neuro-epithelium has an intrinsic capability of renewal during lifetime provided by the existence of globose and horizontal olfactory precursor cells. Additionally, mesenchymal stromal olfactory cells also support the homeostasis of the olfactory mucosa cell population. Under in vitro culture conditions with Dulbecco modified eagle/F12 medium supplemented with 10% fetal bovine serum, tissue biopsies from upper turbinate have generated an adherent population of cells expressing mainly mesenchymal stromal phenotypic markers. A closer examination of these cells has also found co-expression of olfactory precursors and ensheathing cell phenotypic markers. These results were suggestive of a unique property of olfactory mesenchymal stromal cells as potentially olfactory progenitor cells. Objective: To study whether the expression of these proteins in mesenchymal stromal cells is modulated upon neuronal differentiation. Materials and methods: We observed the phenotype of olfactory stromal cells under DMEM/F12 plus 10% fetal bovine serum in comparison to cells from spheres induced by serum-free medium plus growth factors inducers of neural progenitors. Results: The expression of mesenchymal stromal (CD29+, CD73+, CD90+, CD45-), horizontal basal (ICAM-1/CD54+, p63+, p75NGFr+), and ensheathing progenitor cell (nestin+, GFAP+) proteins was determined in the cultured population by flow cytometry. The determination of Oct 3/4, Sox-2, and Mash-1 transcription factors, as well as the neurotrophins BDNF, NT3, and NT4 by RT-PCR in cells, was indicative of functional heterogeneity of the olfactory mucosa tissue sample. Conclusions: Mesenchymal and olfactory precursor proteins were downregulated by serum-free medium and promoted differentiation of mesenchymal stromal cells into neurons and astroglial cells.
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22
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Huang TW, Li ST, Chen DY, Young TH. Neuropeptide Y increases differentiation of human olfactory receptor neurons through the Y1 receptor. Neuropeptides 2019; 78:101964. [PMID: 31526523 DOI: 10.1016/j.npep.2019.101964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 09/04/2019] [Accepted: 09/06/2019] [Indexed: 10/26/2022]
Abstract
Olfactory dysfunction significantly impedes the life quality of patients. Neuropeptide Y (NPY) is not only a neurotrophic factor in the rodent olfactory system but also an orexigenic peptide that regulates feeding behavior. NPY increases the olfactory receptor neurons (ORNs) responsivity during starvation; however, whether NPY can promote differentiation of human ORNs remains unexplored. This study investigates the effect of NPY on the differentiation of human olfactory neuroepithelial cells in vitro. Human olfactory neuroepithelium explants were cultured on tissue culture polystyrene dishes for 21 days. Then, cells were cultured with or without NPY at the concentration of 0.5 ng/mℓ for 7 days. The effects of treatment were assessed by phase contrast microscopy, immunocytochemistry and western blot analysis. The further mechanism was evaluated with NPY Y1 receptor-selected antagonist BIBP3226. NPY-treated olfactory neuroepithelial cells exhibited thin bipolar shape, low circularity, low spread area, and long processes. The expression levels of Ascl1, βIII tubulin, GAP43 and OMP were significantly higher in NPY-treated cells than in controls (p < 0.05). NPY-treated olfactory neuroepithelial cells expressed more components of signal transduction apparatuses, Golf and ADCY3, than those without NPY treatment. Western blot analysis also further confirmed these findings (p < 0.05). Additionally, the expression levels of Ascl1, βIII2 tubulin, GAP43, OMP, ADCY3, and Golf in BIBP3226 + NPY and controls were comparable (p > 0.05). NPY not only increases expressions of protein markers of human olfactory neuronal progenitor cells, but also promotes differentiation of ORN and enhances formation of components of olfactory-specific signal transduction pathway through Y1 receptors.
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Affiliation(s)
- Tsung-Wei Huang
- Department of Electrical Engineering, College of Electrical and Communication Engineering, Yuan Ze University, Taoyuan, Taiwan; Department of Otolaryngology, Far Eastern Memorial Hospital, Taipei, Taiwan.
| | - Sheng-Tien Li
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan
| | - Duan-Yu Chen
- Department of Electrical Engineering, College of Electrical and Communication Engineering, Yuan Ze University, Taoyuan, Taiwan
| | - Tai-Horng Young
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei, Taiwan.
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23
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Abstract
Olfaction plays a critical role in several aspects of life. Olfactory disorders are very common in the general population, and can lead to malnutrition, weight loss, food poisoning, depression, and other disturbances. Odorants are first detected in the upper region of the nose by the main olfactory epithelium (OE). In this region, millions of olfactory sensory neurons (OSNs) interact with odor molecules through the odorant receptors (ORs), which belong to the superfamily of G protein-coupled receptors. The binding of odors to the ORs initiates an electrical signal that travels along the axons to the main olfactory bulb of the brain. The information is then transmitted to other regions of the brain, leading to odorant perception and emotional and behavioral responses. In the OE, OSNs die and are continuously replaced from stem cells localized in the epithelium's basal region. Damage to this epithelium can be caused by multiple factors, leading to anosmia (smell loss). In this chapter, we introduce the basic organization of the OE and focus on the molecular mechanisms involved in odorant perception. We also describe recent experiments that address the mechanisms of OSNs regeneration in response to neuronal injury.
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Affiliation(s)
- Isaías Glezer
- Department of Biochemistry, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Bettina Malnic
- Department of Biochemistry, Institute of Chemistry, Universidade de São Paulo, São Paulo, Brazil.
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Salazar I, Sanchez-Quinteiro P, Barrios AW, López Amado M, Vega JA. Anatomy of the olfactory mucosa. HANDBOOK OF CLINICAL NEUROLOGY 2019; 164:47-65. [PMID: 31604563 DOI: 10.1016/b978-0-444-63855-7.00004-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The classic notion that humans are microsmatic animals was born from comparative anatomy studies showing the reduction in the size of both the olfactory bulbs and the limbic brain relative to the whole brain. However, the human olfactory system contains a number of neurons comparable to that of most other mammals, and humans have exquisite olfactory abilities. Major advances in molecular and genetic research have resulted in the identification of extremely large gene families that express receptors for sensing odors. Such advances have led to a renaissance of studies focused on both human and nonhuman aspects of olfactory physiology and function. Evidence that olfactory dysfunction is among the earliest signs of a number of neurodegenerative and neuropsychiatric disorders has led to considerable interest in the use of olfactory epithelial biopsies for potentially identifying such disorders. Moreover, the unique features of the olfactory ensheathing cells have made the olfactory mucosa a promising and unexpected source of cells for treating spinal cord injuries and other neural injuries in which cell guidance is critical. The olfactory system of humans and other primates differs in many ways from that of other species. In this chapter we provide an overview of the anatomy of not only the human olfactory mucosa but of mucosae from a range of mammals from which more detailed information is available. Basic information regarding the general organization of the olfactory mucosa, including its receptor cells and the large number of other cell types critical for their maintenance and function, is provided. Cross-species comparisons are made when appropriate. The polemic issue of the human vomeronasal organ in both the adult and fetus is discussed, along with recent findings regarding olfactory subsystems within the nose of a number of mammals (e.g., the septal organ and Grüneberg ganglion).
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Affiliation(s)
- Ignacio Salazar
- Department of Anatomy, Animal Production and Veterinary Clinical Sciences, Unit of Anatomy and Embryology, Faculty of Veterinary, University of Santiago de Compostela, Lugo, Spain.
| | - Pablo Sanchez-Quinteiro
- Department of Anatomy, Animal Production and Veterinary Clinical Sciences, Unit of Anatomy and Embryology, Faculty of Veterinary, University of Santiago de Compostela, Lugo, Spain
| | - Arthur W Barrios
- Laboratory of Histology, Embryology and Animal Pathology, Faculty of Veterinary Medicine, University Nacional Mayor of San Marcos, Lima, Peru
| | - Manuel López Amado
- Department of Otorhinolaryngology, University Hospital La Coruña, La Coruña, Spain
| | - José A Vega
- Unit of Anatomy, Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, Oviedo, Spain
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25
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Savya SP, Kunkhyen T, Cheetham CEJ. Low survival rate of young adult-born olfactory sensory neurons in the undamaged mouse olfactory epithelium. J Bioenerg Biomembr 2018; 51:41-51. [PMID: 30302619 DOI: 10.1007/s10863-018-9774-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 10/02/2018] [Indexed: 01/24/2023]
Abstract
Olfactory sensory neurons (OSNs) are generated throughout life from progenitor cells in the olfactory epithelium. OSN axons project in an odorant receptor-specific manner to the olfactory bulb (OB), forming an ordered array of glomeruli where they provide sensory input to OB neurons. The tetracycline transactivator (tTA) system permits developmental stage-specific expression of reporter genes in OSNs and has been widely used for structural and functional studies of the development and plasticity of the mouse olfactory system. However, the cellular ages at which OSNs stop expressing reporters driven by the immature OSN-specific Gγ8-tTA driver line and begin to express reporters driven by the mature OSN-specific OMP-tTA driver line have not been directly determined. We pulse-labeled terminally dividing cells in the olfactory epithelium of 28-day-old (P28) mice with EdU and analyzed EdU labeling in OSNs expressing fluorescent reporter proteins under control of either the Gγ8-tTA or OMP-tTA driver line 5-14 days later. Expression of OMP-tTA-driven reporters began in 6-day-old OSNs, while the vast majority of newborn OSNs did not express Gγ8-tTA-driven fluorescent proteins beyond 8 days of cellular age. Surprisingly, we also found a low survival rate for P28-born OSNs, very few of which survived for more than 14 days. We propose that OSN survival requires the formation of stable synaptic connections and hence may be dependent on organismal age.
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Affiliation(s)
- Sajishnu P Savya
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St., BST E1456, Pittsburgh, PA, 15213, USA.,Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Tenzin Kunkhyen
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St., BST E1456, Pittsburgh, PA, 15213, USA
| | - Claire E J Cheetham
- Department of Neurobiology, University of Pittsburgh, 200 Lothrop St., BST E1456, Pittsburgh, PA, 15213, USA. .,Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA, USA.
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26
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Fan JR, Lee HT, Lee W, Lin CH, Hsu CY, Hsieh CH, Shyu WC. Potential role of CBX7 in regulating pluripotency of adult human pluripotent-like olfactory stem cells in stroke model. Cell Death Dis 2018; 9:502. [PMID: 29717132 PMCID: PMC5931587 DOI: 10.1038/s41419-018-0519-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 03/08/2018] [Accepted: 03/12/2018] [Indexed: 12/17/2022]
Abstract
The adult olfactory mucosa, a highly regenerative tissue with unique life-long neurogenesis ability, is thought to harbor a naïve yet tightly controlled stem cell population. It will provide unique benefits in various stem cell-based therapies, such as stroke treatment. Here, we identified a subpopulation of adult pluripotent-like olfactory stem cells (APOSCs), which were modulated by an epigenetic repressor of CBX7. APOSCs form a floating sphere, express pluripotency markers Nanog, Oct-4, Sox-2, and SSEA-4 and show alkaline phosphatase activity. In addition, APOSCs display self-renewal and a pluripotent potential to differentiate into all three germ layers. Moreover, APOSCs coexpress pluripotency markers with CBX7. Within their natural niche, APOSCs from CBX7+/+ mice responded promptly to either spontaneous or injury-induced tissue regeneration. However, APOSCs from CBX7−/− mice manifested an impaired self-renewal and differentiation potential. Similarly, in vitro-cultivated CBX7−/− APOSCs underwent premature senescence, whereas CBX7+/+ APOSCs still actively divided, indicating that CBX7 is required for the self-renewal of APOSCs. Intracerebral implantation of APOSCs improved the stroke-mediated neurological dysfunction in rodents. These findings indicate that CBX7 plays a critical role in the regenerative properties of APOSCs and indicate the safety and feasibility of implantation of autologous APOSCs in stroke treatment.
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Affiliation(s)
- Jia-Rong Fan
- Translational Medicine Research Center, and Department of Neurology, China Medical University Hospital, Taichung, 40440, Taiwan
| | - Hsu-Tung Lee
- Department of Neurosurgery, Taichung Veterans General Hospital, Taichung, 40421, Taiwan.,Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Wei Lee
- Translational Medicine Research Center, and Department of Neurology, China Medical University Hospital, Taichung, 40440, Taiwan
| | - Chen-Huan Lin
- Translational Medicine Research Center, and Department of Neurology, China Medical University Hospital, Taichung, 40440, Taiwan
| | - Chun Y Hsu
- Graduate Institute of Biomedical Science, China Medical University Hospital, Taichung, 40440, Taiwan
| | - Chia-Hung Hsieh
- Graduate Institute of Biomedical Science, China Medical University Hospital, Taichung, 40440, Taiwan.
| | - Woei-Cherng Shyu
- Translational Medicine Research Center, and Department of Neurology, China Medical University Hospital, Taichung, 40440, Taiwan. .,Graduate Institute of Biomedical Science, China Medical University Hospital, Taichung, 40440, Taiwan. .,Department of Occupational Therapy, Asia University, Taichung, Taiwan.
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Omais S, Jaafar C, Ghanem N. "Till Death Do Us Part": A Potential Irreversible Link Between Aberrant Cell Cycle Control and Neurodegeneration in the Adult Olfactory Bulb. Front Neurosci 2018; 12:144. [PMID: 29593485 PMCID: PMC5854681 DOI: 10.3389/fnins.2018.00144] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 02/22/2018] [Indexed: 12/13/2022] Open
Abstract
Adult neurogenesis (AN) is an ongoing developmental process that generates newborn neurons in the olfactory bulb (OB) and the hippocampus (Hi) throughout life and significantly contributes to brain plasticity. Adult neural stem and progenitor cells (aNSPCs) are relatively limited in number and fate and are spatially restricted to the subventricular zone (SVZ) and the subgranular zone (SGZ). During AN, the distinct roles played by cell cycle proteins extend beyond cell cycle control and constitute key regulatory mechanisms involved in neuronal maturation and survival. Importantly, aberrant cell cycle re-entry (CCE) in post-mitotic neurons has been strongly linked to the abnormal pathophysiology in rodent models of neurodegenerative diseases with potential implications on the etiology and progression of such diseases in humans. Here, we present an overview of AN in the SVZ-OB and olfactory epithelium (OE) in mice and humans followed by a comprehensive update of the distinct roles played by cell cycle proteins including major tumors suppressor genes in various steps during neurogenesis. We also discuss accumulating evidence underlining a strong link between abnormal cell cycle control, olfactory dysfunction and neurodegeneration in the adult and aging brain. We emphasize that: (1) CCE in post-mitotic neurons due to loss of cell cycle suppression and/or age-related insults as well as DNA damage can anticipate the development of neurodegenerative lesions and protein aggregates, (2) the age-related decline in SVZ and OE neurogenesis is associated with compensatory pro-survival mechanisms in the aging OB which are interestingly similar to those detected in Alzheimer's disease and Parkinson's disease in humans, and (3) the OB represents a well suitable model to study the early manifestation of age-related defects that may eventually progress into the formation of neurodegenerative lesions and, possibly, spread to the rest of the brain. Such findings may provide a novel approach to the modeling of neurodegenerative diseases in humans from early detection to progression and treatment as well.
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Affiliation(s)
- Saad Omais
- Department of Biology, American University of Beirut, Beirut, Lebanon
| | - Carine Jaafar
- Department of Biology, American University of Beirut, Beirut, Lebanon
| | - Noël Ghanem
- Department of Biology, American University of Beirut, Beirut, Lebanon
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Kjell J, Olson L. Rat models of spinal cord injury: from pathology to potential therapies. Dis Model Mech 2017; 9:1125-1137. [PMID: 27736748 PMCID: PMC5087825 DOI: 10.1242/dmm.025833] [Citation(s) in RCA: 233] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A long-standing goal of spinal cord injury research is to develop effective spinal cord repair strategies for the clinic. Rat models of spinal cord injury provide an important mammalian model in which to evaluate treatment strategies and to understand the pathological basis of spinal cord injuries. These models have facilitated the development of robust tests for assessing the recovery of locomotor and sensory functions. Rat models have also allowed us to understand how neuronal circuitry changes following spinal cord injury and how recovery could be promoted by enhancing spontaneous regenerative mechanisms and by counteracting intrinsic inhibitory factors. Rat studies have also revealed possible routes to rescuing circuitry and cells in the acute stage of injury. Spatiotemporal and functional studies in these models highlight the therapeutic potential of manipulating inflammation, scarring and myelination. In addition, potential replacement therapies for spinal cord injury, including grafts and bridges, stem primarily from rat studies. Here, we discuss advantages and disadvantages of rat experimental spinal cord injury models and summarize knowledge gained from these models. We also discuss how an emerging understanding of different forms of injury, their pathology and degree of recovery has inspired numerous treatment strategies, some of which have led to clinical trials. Summary: In this Review, we discuss the advantages and disadvantages of the rat for studies of experimental spinal cord injury and summarize the knowledge gained from such studies.
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Affiliation(s)
- Jacob Kjell
- Department of Physiological Genomics, Ludwig-Maximilians-Universität München, Munich 80336, Germany
| | - Lars Olson
- Department of Neuroscience, Karolinska Institutet, Stockholm 171 77, Sweden
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Galván-Arrieta T, Trueta C, Cercós MG, Valdés-Tovar M, Alarcón S, Oikawa J, Zamudio-Meza H, Benítez-King G. The role of melatonin in the neurodevelopmental etiology of schizophrenia: A study in human olfactory neuronal precursors. J Pineal Res 2017; 63. [PMID: 28500770 DOI: 10.1111/jpi.12421] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 05/05/2017] [Indexed: 01/13/2023]
Abstract
Dim light exposure of the mother during pregnancy has been proposed as one of the environmental factors that affect the fetal brain development in schizophrenia. Melatonin circulating levels are regulated by the environmental light/dark cycle. This hormone stimulates neuronal differentiation in the adult brain. However, little is known about its role in the fetal human brain development. Olfactory neuronal precursors (ONPs) are useful for studying the physiopathology of neuropsychiatric diseases because they mimic all the stages of neurodevelopment in culture. Here, we first characterized whether melatonin stimulates neuronal differentiation in cloned ONPs obtained from a healthy control subject (HCS). Then, melatonin effects were evaluated in primary cultures of ONPs derived from a patient diagnosed with schizophrenia (SZ) and an age- and gender-matched HCS. Axonal formation was evidenced morphologically by tau immunostaining and by GSK3β phosphorylated state. Potassium-evoked secretion was assessed as a functional feature of differentiated neurons. As well, we report the expression of MT1/2 receptors in human ONPs for the first time. Melatonin stimulated axonal formation and ramification in cloned ONPs through a receptor-mediated mechanism and enhanced the amount and velocity of axonal and somatic secretion. SZ ONPs displayed reduced axogenesis associated with lower levels of pGSK3β and less expression of melatonergic receptors regarding the HCS ONPs. Melatonin counteracted this reduction in SZ cells. Altogether, our results show that melatonin signaling is crucial for functional differentiation of human ONPs, strongly suggesting that a deficit of this indoleamine may lead to an impaired neurodevelopment which has been associated with the etiology of schizophrenia.
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Affiliation(s)
- Tania Galván-Arrieta
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, México
| | - Citlali Trueta
- Departamento de Neurofisiología, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, México
| | - Montserrat G Cercós
- Departamento de Neurofisiología, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, México
| | - Marcela Valdés-Tovar
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, México
| | - Salvador Alarcón
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, México
| | - Julian Oikawa
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, México
| | - Horacio Zamudio-Meza
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, México
| | - Gloria Benítez-King
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Ciudad de México, México
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Hendra and Nipah Virus Infection in Cultured Human Olfactory Epithelial Cells. mSphere 2017; 2:mSphere00252-17. [PMID: 28680971 PMCID: PMC5489660 DOI: 10.1128/msphere.00252-17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 06/08/2017] [Indexed: 01/23/2023] Open
Abstract
Henipaviruses are emerging zoonotic pathogens that can cause acute and severe respiratory and neurological disease in humans. The pathways by which henipaviruses enter the central nervous system (CNS) in humans are still unknown. The observation that human olfactory neurons are highly susceptible to infection with henipaviruses demonstrates that the olfactory epithelium can serve as a site of Henipavirus entry into the CNS. Henipaviruses are emerging zoonotic viruses and causative agents of encephalitis in humans. However, the mechanisms of entry into the central nervous system (CNS) in humans are not known. Here, we evaluated the possible role of olfactory epithelium in virus entry into the CNS. We characterized Hendra virus (HeV) and Nipah virus (NiV) infection of primary human olfactory epithelial cultures. We show that henipaviruses can infect mature olfactory sensory neurons. Henipaviruses replicated efficiently, resulting in cytopathic effect and limited induction of host responses. These results show that human olfactory epithelium is susceptible to infection with henipaviruses, suggesting that this could be a pathway for neuroinvasion in humans. IMPORTANCE Henipaviruses are emerging zoonotic pathogens that can cause acute and severe respiratory and neurological disease in humans. The pathways by which henipaviruses enter the central nervous system (CNS) in humans are still unknown. The observation that human olfactory neurons are highly susceptible to infection with henipaviruses demonstrates that the olfactory epithelium can serve as a site of Henipavirus entry into the CNS.
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Ramírez-Rodríguez GB, Perera-Murcia GR, Ortiz-López L, Vega-Rivera NM, Babu H, García-Anaya M, González-Olvera JJ. Vascular endothelial growth factor influences migration and focal adhesions, but not proliferation or viability, of human neural stem/progenitor cells derived from olfactory epithelium. Neurochem Int 2017; 108:417-425. [PMID: 28600187 DOI: 10.1016/j.neuint.2017.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 06/03/2017] [Accepted: 06/05/2017] [Indexed: 01/19/2023]
Abstract
In humans, new neurons are continuously added in the olfactory epithelium even in the adulthood. The resident neural stem/progenitor cells (hNS/PCs-OE) in the olfactory epithelium are influenced by several growth factors and neurotrophins. Among these modulators the vascular endothelial growth factor (VEGF) has attracted attention due its implicated in cell proliferation, survival and migration of other type of neural/stem progenitor cells. Interestingly, VEGFr2 receptor expression in olfactory epithelium has been described in amphibians but not in humans. Here we show that VEGFr is expressed in the hNS/PCs-OE. We also investigated the effect of VEGF on the hNS/PCs-OE proliferation, viability and migration in vitro. Additionally, pharmacological approaches showed that VEGF (0.5 ng/ml)-stimulated migration of hNS/PCs-OE was blocked with the compound DMH4, which prevents the activation of VEGFr2. Similar effects were found with the inhibitors for Rac (EHT1864) and p38MAPK (SB203850) proteins, respectively. These observations occurred with changes in focal adhesion contacts. However, no effects of VEGF on proliferation or viability were found in hNS/PCs-OE. Our results suggest that hNS/PCs-OE respond to VEGF involving VEGFr2, Rac and p38MAPK.
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Affiliation(s)
- Gerardo Bernabé Ramírez-Rodríguez
- Laboratory of Neurogenesis, Division of Clinical Investigations, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, 14370 Ciudad de México, Mexico.
| | - Gerardo Rodrigo Perera-Murcia
- Laboratory of Neurogenesis, Division of Clinical Investigations, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, 14370 Ciudad de México, Mexico
| | - Leonardo Ortiz-López
- Laboratory of Neurogenesis, Division of Clinical Investigations, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, 14370 Ciudad de México, Mexico
| | - Nelly Maritza Vega-Rivera
- Laboratory of Neuropsychopharmacology, Division of Neuroscience, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, 14370 Ciudad de México, Mexico
| | - Harish Babu
- Department of Neurosurgery, Cedars-Sinai Medical Center, 127 S. San Vicente Boulevard, Los Angeles, CA 90048, USA
| | - Maria García-Anaya
- Division of Clinical Investigations, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, 14370 Ciudad de México, Mexico
| | - Jorge Julio González-Olvera
- Division of Clinical Investigations, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, 14370 Ciudad de México, Mexico
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Abstract
PURPOSE OF REVIEW The goal of this review article is to introduce olfactory epithelium-derived cell/tissue models as a promising surrogate system to study the molecular mechanisms implicated in schizophrenia and other neuropsychiatric disorders. Here, we particularly focus on the utility of their neural progenitors. RECENT FINDINGS Recent investigations of the pathophysiology of schizophrenia using olfactory epithelium-derived tissue/cell models have provided insights about schizophrenia-associated alterations in neurodevelopment, stress response, and gene/protein expression regulatory pathways. SUMMARY The olfactory epithelium retains the capacity for lifelong neurogenesis and regeneration, because of the presence of neural stem cells and progenitors. Thus, both mature neurons and neural progenitors can be obtained from the olfactory epithelium without the need for genetic reprogramming and related confounds. Furthermore, the olfactory epithelium is highly scalable resource in translational settings. Here, we also demonstrate recent findings from research using olfactory epithelium-derived tissue/cell models in schizophrenia and other brain disorders. In summary, we propose that the olfactory epithelium is a promising resource to study neural molecular and cellular signatures relevant to the pathology of schizophrenia and other mental disorders.
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Exfoliated Human Olfactory Neuroepithelium: A Source of Neural Progenitor Cells. Mol Neurobiol 2017; 55:2516-2523. [PMID: 28391555 DOI: 10.1007/s12035-017-0500-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 03/16/2017] [Indexed: 10/19/2022]
Abstract
Neural progenitor cells (NPC) contained in the human adult olfactory neuroepithelium (ONE) possess an undifferentiated state, the capability of self-renewal, the ability to generate neural and glial cells as well as being kept as neurospheres in cell culture conditions. Recently, NPC have been isolated from human or animal models using high-risk surgical methods. Therefore, it was necessary to improve methodologies to obtain and maintain human NPC as well as to achieve better knowledge of brain disorders. In this study, we propose the establishment and characterization of NPC cultures derived from the human olfactory neuroepithelium, using non-invasive procedures. Twenty-two healthy individuals (29.7 ± 4.5 years of age) were subjected to nasal exfoliation. Cells were recovered and kept as neurospheres under serum-free conditions. The neural progenitor origin of these neurospheres was determined by immunocytochemistry and qPCR. Their ability for self-renewal and multipotency was analyzed by clonogenic and differentiation assays, respectively. In the cultures, the ONE cells preserved the phenotype of the neurospheres. The expression levels of Nestin, Musashi, Sox2, and βIII-tubulin demonstrated the neural origin of the neurospheres; 48% of the cells separated could generate neurospheres, determining that they retained their self-renewal capacity. Neurospheres were differentiated in the absence of growth factors (EGF and FGF), and their multipotency ability was maintained as well. We were also able to isolate and grow human neural progenitor cells (neurospheres) through nasal exfoliates (non-invasive method) of the ONE from healthy adults, which is an extremely important contribution for the study of brain disorders and for the development of new therapies.
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Van de Bittner GC, Riley MM, Cao L, Ehses J, Herrick SP, Ricq EL, Wey HY, O’Neill MJ, Ahmed Z, Murray TK, Smith JE, Wang C, Schroeder FA, Albers MW, Hooker JM. Nasal neuron PET imaging quantifies neuron generation and degeneration. J Clin Invest 2017; 127:681-694. [PMID: 28112682 PMCID: PMC5272198 DOI: 10.1172/jci89162] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 12/01/2016] [Indexed: 01/31/2023] Open
Abstract
Olfactory dysfunction is broadly associated with neurodevelopmental and neurodegenerative diseases and predicts increased mortality rates in healthy individuals. Conventional measurements of olfactory health assess odor processing pathways within the brain and provide a limited understanding of primary odor detection. Quantification of the olfactory sensory neurons (OSNs), which detect odors within the nasal cavity, would provide insight into the etiology of olfactory dysfunction associated with disease and mortality. Notably, OSNs are continually replenished by adult neurogenesis in mammals, including humans, so OSN measurements are primed to provide specialized insights into neurological disease. Here, we have evaluated a PET radiotracer, [11C]GV1-57, that specifically binds mature OSNs and quantifies the mature OSN population in vivo. [11C]GV1-57 monitored native OSN population dynamics in rodents, detecting OSN generation during postnatal development and aging-associated neurodegeneration. [11C]GV1-57 additionally measured rates of neuron regeneration after acute injury and early-stage OSN deficits in a rodent tauopathy model of neurodegenerative disease. Preliminary assessment in nonhuman primates suggested maintained uptake and saturable binding of [18F]GV1-57 in primate nasal epithelium, supporting its translational potential. Future applications for GV1-57 include monitoring additional diseases or conditions associated with olfactory dysregulation, including cognitive decline, as well as monitoring effects of neuroregenerative or neuroprotective therapeutics.
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Affiliation(s)
| | - Misha M. Riley
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, and
| | - Luxiang Cao
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Janina Ehses
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, and
| | - Scott P. Herrick
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Emily L. Ricq
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, and
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts, USA
| | - Hsiao-Ying Wey
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, and
| | - Michael J. O’Neill
- Eli Lilly and Co. Ltd., Lilly Research Centre, Erl Wood Manor, Windlesham, Surrey, United Kingdom
| | - Zeshan Ahmed
- Eli Lilly and Co. Ltd., Lilly Research Centre, Erl Wood Manor, Windlesham, Surrey, United Kingdom
| | - Tracey K. Murray
- Eli Lilly and Co. Ltd., Lilly Research Centre, Erl Wood Manor, Windlesham, Surrey, United Kingdom
| | - Jaclyn E. Smith
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, and
| | - Changning Wang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, and
| | | | - Mark W. Albers
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - Jacob M. Hooker
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, and
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Solís-Chagoyán H, Flores-Soto E, Reyes-García J, Valdés-Tovar M, Calixto E, Montaño LM, Benítez-King G. Voltage-Activated Calcium Channels as Functional Markers of Mature Neurons in Human Olfactory Neuroepithelial Cells: Implications for the Study of Neurodevelopment in Neuropsychiatric Disorders. Int J Mol Sci 2016; 17:ijms17060941. [PMID: 27314332 PMCID: PMC4926474 DOI: 10.3390/ijms17060941] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 06/02/2016] [Accepted: 06/07/2016] [Indexed: 11/16/2022] Open
Abstract
In adulthood, differentiation of precursor cells into neurons continues in several brain structures as well as in the olfactory neuroepithelium. Isolated precursors allow the study of the neurodevelopmental process in vitro. The aim of this work was to determine whether the expression of functional Voltage-Activated Ca2+ Channels (VACC) is dependent on the neurodevelopmental stage in neuronal cells obtained from the human olfactory epithelium of a single healthy donor. The presence of channel-forming proteins in Olfactory Sensory Neurons (OSN) was demonstrated by immunofluorescent labeling, and VACC functioning was assessed by microfluorometry and the patch-clamp technique. VACC were immunodetected only in OSN. Mature neurons responded to forskolin with a five-fold increase in Ca2+. By contrast, in precursor cells, a subtle response was observed. The involvement of VACC in the precursors’ response was discarded for the absence of transmembrane inward Ca2+ movement evoked by step depolarizations. Data suggest differential expression of VACC in neuronal cells depending on their developmental stage and also that the expression of these channels is acquired by OSN during maturation, to enable specialized functions such as ion movement triggered by membrane depolarization. The results support that VACC in OSN could be considered as a functional marker to study neurodevelopment.
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Affiliation(s)
- Héctor Solís-Chagoyán
- Laboratorio de Neurofarmacología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México-Xochimilco No. 101, Col. San Lorenzo-Huipulco, Mexico City 14370, Mexico.
| | - Edgar Flores-Soto
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
| | - Jorge Reyes-García
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
| | - Marcela Valdés-Tovar
- Laboratorio de Neurofarmacología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México-Xochimilco No. 101, Col. San Lorenzo-Huipulco, Mexico City 14370, Mexico.
| | - Eduardo Calixto
- Departamento de Neurobiología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México-Xochimilco No. 101, Col. San Lorenzo-Huipulco, Mexico City 14370, Mexico.
| | - Luis M Montaño
- Departamento de Farmacología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
| | - Gloria Benítez-King
- Laboratorio de Neurofarmacología, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Calzada México-Xochimilco No. 101, Col. San Lorenzo-Huipulco, Mexico City 14370, Mexico.
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Borgmann-Winter KE, Wang HY, Ray R, Willis BR, Moberg PJ, Rawson NE, Gur RE, Turetsky BI, Hahn CG. Altered G Protein Coupling in Olfactory Neuroepithelial Cells From Patients With Schizophrenia. Schizophr Bull 2016; 42:377-85. [PMID: 26373539 PMCID: PMC4753598 DOI: 10.1093/schbul/sbv129] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Increasing evidence suggests that olfactory dysfunction is an endophenotype of schizophrenia, and thus the olfactory system can be studied both in relation to this sensory dysfunction and also as a means of examining pathophysiologic mechanisms of schizophrenia. In this study, we examined human olfactory neuroepithelial (ON) biopsy tissues and their in vitro culture cells for ligand-induced guanine nucleotide-binding protein (G protein) activation and downstream signaling. We assessed the binding of a nonhydrolyzable GTP analogue [(35)S]GTPγS binding to specific G protein subtypes in response to odorants, dopamine, or serotonin in ON cell membranes from matched schizophrenia-control subjects. In response to odorant mixtures, we found decreased [(35)S]GTPγS binding to Gαs/olf in schizophrenia patients. These changes were not mediated by mRNA expression of key molecules of G protein coupling, including adenylate cyclase III (ACIII), protein kinase A (PKA), protein kinase Cγ (PKCγ), or Gαs or Gαolf in ON cells or ON biopsy tissues. In contrast, dopamine (DA)- and serotonin (5HT)-induced S(35)-GTPγS binding to Gαs/olf and Gαq/11 were significantly increased in schizophrenia cases, while these parameters were strikingly reduced by in vitro treatment with antipsychotics. Patients with schizophrenia exhibit increases in electrolfactogram (EOG) recordings, suggesting enhanced odorant-induced activation. Our results of decreased odorant-induced G protein activation may point further downstream for underlying mechanisms for increased EOG measures. Increased G protein activation in response to DA and 5HT may suggest increased postreceptor DA or 5HT signaling as an additional mechanism of dopaminergic or serotonergic dysregulation in schizophrenia.
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Affiliation(s)
- Karin E. Borgmann-Winter
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA;,Department of Child and Adolescent Psychiatry and Behavioral Sciences, Children’s Hospital of Philadelphia, Philadelphia, PA
| | - Hoau-Yan Wang
- Department of Physiology, Pharmacology and Neuroscience, City University of New York Medical School, New York, NY;
| | - Rabindranath Ray
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA
| | - Brooke R. Willis
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA
| | - Paul J. Moberg
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA
| | | | - Raquel E. Gur
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA
| | - Bruce I. Turetsky
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA
| | - Chang-Gyu Hahn
- Department of Psychiatry, University of Pennsylvania, Philadelphia, PA;
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Benítez-King G, Valdés-Tovar M, Trueta C, Galván-Arrieta T, Argueta J, Alarcón S, Lora-Castellanos A, Solís-Chagoyán H. The microtubular cytoskeleton of olfactory neurons derived from patients with schizophrenia or with bipolar disorder: Implications for biomarker characterization, neuronal physiology and pharmacological screening. Mol Cell Neurosci 2016; 73:84-95. [PMID: 26837043 DOI: 10.1016/j.mcn.2016.01.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 01/26/2016] [Accepted: 01/29/2016] [Indexed: 01/29/2023] Open
Abstract
Schizophrenia (SZ) and Bipolar Disorder (BD) are highly inheritable chronic mental disorders with a worldwide prevalence of around 1%. Despite that many efforts had been made to characterize biomarkers in order to allow for biological testing for their diagnoses, these disorders are currently detected and classified only by clinical appraisal based on the Diagnostic and Statistical Manual of Mental Disorders. Olfactory neuroepithelium-derived neuronal precursors have been recently proposed as a model for biomarker characterization. Because of their peripheral localization, they are amenable to collection and suitable for being cultured and propagated in vitro. Olfactory neuroepithelial cells can be obtained by a non-invasive brush-exfoliation technique from neuropsychiatric patients and healthy subjects. Neuronal precursors isolated from these samples undergo in vitro the cytoskeletal reorganization inherent to the neurodevelopment process which has been described as one important feature in the etiology of both diseases. In this paper, we will review the current knowledge on microtubular organization in olfactory neurons of patients with SZ and with BD that may constitute specific cytoskeletal endophenotypes and their relation with alterations in L-type voltage-activated Ca(2+) currents. Finally, the potential usefulness of neuronal precursors for pharmacological screening will be discussed.
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Affiliation(s)
- G Benítez-King
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Mexico.
| | - M Valdés-Tovar
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Mexico
| | - C Trueta
- Departamento de Neurofisiología, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz (INPRFM), Calzada México-Xochimilco No. 101, Col. San Lorenzo-Huipulco, C.P. 14370, Tlalpan, Distrito Federal, Mexico
| | - T Galván-Arrieta
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Mexico
| | - J Argueta
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Mexico
| | - S Alarcón
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Mexico
| | - A Lora-Castellanos
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Mexico
| | - H Solís-Chagoyán
- Laboratorio de Neurofarmacología, Subdirección de Investigaciones Clínicas, Mexico
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Silva Teixeira CS, Cerqueira NMFSA, Silva Ferreira AC. Unravelling the Olfactory Sense: From the Gene to Odor Perception. Chem Senses 2015; 41:105-21. [PMID: 26688501 DOI: 10.1093/chemse/bjv075] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Although neglected by science for a long time, the olfactory sense is now the focus of a panoply of studies that bring new insights and raises interesting questions regarding its functioning. The importance in the clarification of this process is of interest for science, but also motivated by the food and perfume industries boosted by a consumer society with increasingly demands for higher quality standards. In this review, a general overview of the state of art of science regarding the olfactory sense is presented with the main focus on the peripheral olfactory system. Special emphasis will be given to the deorphanization of the olfactory receptors (ORs), a critical issue because the specificity and functional properties of about 90% of human ORs remain unknown mainly due to the difficulties associated with the functional expression of ORs in high yields.
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Affiliation(s)
- Carla S Silva Teixeira
- Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal
| | - Nuno M F S A Cerqueira
- UCIBIO@Requimte/Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal and
| | - António C Silva Ferreira
- Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal, Department of Viticulture and Oenology, Institute for Wine Biotechnology, University of Stellenbosch, Private Bag XI, Matieland 7602, South Africa
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39
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Manzini I, Frasnelli J, Croy I. [How we smell and what it means to us: basic principles of the sense of smell]. HNO 2015; 62:846-52. [PMID: 25315675 DOI: 10.1007/s00106-014-2925-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The origins of the sense of smell lie in the perception of environmental molecules and go back to unicellular organisms such as bacteria. Odors transmit a multitude of information about the chemical composition of our environment. The sense of smell helps people and animals with orientation in space, warns of potential threats, influences the choice of sexual partners, regulates food intake and influences feelings and social behavior in general. The perception of odors begins in sensory neurons residing in the olfactory epithelium that express G protein-coupled receptors, the so-called olfactory receptors. The binding of odor molecules to olfactory receptors initiates a signal transduction cascade that converts olfactory stimuli into electrical signals. These signals are then transmitted to the olfactory bulb, the first relay center in the olfactory pathway, via the axons of the sensory neurons. The olfactory information is processed in the bulb and then transferred to higher olfactory centers via axons of mitral cells, the bulbar projection neurons. This review describes the mechanisms involved in peripheral detection of odorants, outlines the further processing of olfactory information in higher olfactory centers and finally gives an overview of the overall significance of the ability to smell.
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Affiliation(s)
- I Manzini
- Institut für Neurophysiologie und zelluläre Biophysik, DFG-Forschungszentrum Mikroskopie im Nanometerbereich und Molekularphysiologie des Gehirns (CNMPB), Universität Göttingen, Humboldtallee 23, 37073, Göttingen, Deutschland,
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40
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Translational potential of olfactory mucosa for the study of neuropsychiatric illness. Transl Psychiatry 2015; 5:e527. [PMID: 25781226 PMCID: PMC4354342 DOI: 10.1038/tp.2014.141] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 10/22/2014] [Accepted: 11/17/2014] [Indexed: 01/02/2023] Open
Abstract
The olfactory mucosa (OM) is a unique source of regenerative neural tissue that is readily obtainable from living human subjects and thus affords opportunities for the study of psychiatric illnesses. OM tissues can be used, either as ex vivo OM tissue or in vitro OM-derived neural cells, to explore parameters that have been difficult to assess in the brain of living individuals with psychiatric illness. As OM tissues are distinct from brain tissues, an understanding of the neurobiology of the OM is needed to relate findings in these tissues to those of the brain as well as to design and interpret ex vivo or in vitro OM studies. To that end, we discuss the molecular, cellular and functional characteristics of cell types within the olfactory mucosa, describe the organization of the OM and highlight its role in the olfactory neurocircuitry. In addition, we discuss various approaches to in vitro culture of OM-derived cells and their characterization, focusing on the extent to which they reflect the in vivo neurobiology of the OM. Finally, we review studies of ex vivo OM tissues and in vitro OM-derived cells from individuals with psychiatric, neurodegenerative and neurodevelopmental disorders. In particular, we discuss the concordance of this work with postmortem brain studies and highlight possible future approaches, which may offer distinct strengths in comparison to in vitro paradigms based on genomic reprogramming.
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Kandasamy M, Rosskopf M, Wagner K, Klein B, Couillard-Despres S, Reitsamer HA, Stephan M, Nguyen HP, Riess O, Bogdahn U, Winkler J, von Hörsten S, Aigner L. Reduction in subventricular zone-derived olfactory bulb neurogenesis in a rat model of Huntington's disease is accompanied by striatal invasion of neuroblasts. PLoS One 2015; 10:e0116069. [PMID: 25719447 PMCID: PMC4342015 DOI: 10.1371/journal.pone.0116069] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 12/05/2014] [Indexed: 01/18/2023] Open
Abstract
Huntington’s disease (HD) is an inherited progressive neurodegenerative disorder caused by an expanded CAG repeat in exon 1 of the huntingtin gene (HTT). The primary neuropathology of HD has been attributed to the preferential degeneration of medium spiny neurons (MSN) in the striatum. Reports on striatal neurogenesis have been a subject of debate; nevertheless, it should be considered as an endogenous attempt to repair the brain. The subventricular zone (SVZ) might offer a close-by region to supply the degenerated striatum with new cells. Previously, we have demonstrated that R6/2 mice, a widely used preclinical model representing an early onset HD, showed reduced olfactory bulb (OB) neurogenesis but induced striatal migration of neuroblasts without affecting the proliferation of neural progenitor cell (NPCs) in the SVZ. The present study revisits these findings, using a clinically more relevant transgenic rat model of late onset HD (tgHD rats) carrying the human HTT gene with 51 CAG repeats and mimicking many of the neuropathological features of HD seen in patients. We demonstrate that cell proliferation is reduced in the SVZ and OB of tgHD rats compared to WT rats. In the OB of tgHD rats, although cell survival was reduced, the frequency of neuronal differentiation was not altered in the granule cell layer (GCL) compared to the WT rats. However, an increased frequency of dopamenergic neuronal differentiation was noticed in the glomerular layer (GLOM) of tgHD rats. Besides this, we observed a selective proliferation of neuroblasts in the adjacent striatum of tgHD rats. There was no evidence for neuronal maturation and survival of these striatal neuroblasts. Therefore, the functional role of these invading neuroblasts still needs to be determined, but they might offer an endogenous alternative for stem or neuronal cell transplantation strategies.
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Affiliation(s)
- Mahesh Kandasamy
- Institute of Molecular Regenerative Medicine, Paracelsus Medical University, Salzburg, Austria
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - Michael Rosskopf
- Department of Neurology, University Hospital Regensburg, Regensburg, Germany
| | - Katrin Wagner
- Institute of Molecular Regenerative Medicine, Paracelsus Medical University, Salzburg, Austria
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - Barbara Klein
- Institute of Molecular Regenerative Medicine, Paracelsus Medical University, Salzburg, Austria
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University, Salzburg, Austria
| | - Sebastien Couillard-Despres
- Institute of Molecular Regenerative Medicine, Paracelsus Medical University, Salzburg, Austria
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University, Salzburg, Austria
- Institute of Experimental Neuroregeneration, Paracelsus Medical University, Salzburg, Austria
| | - Herbert A. Reitsamer
- Department of Ophthalmology, SALK, Paracelsus Medical University, Salzburg, Austria
| | - Michael Stephan
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Huu Phuc Nguyen
- Department of Medical Genetics, University of Tübingen, Tübingen, Germany
| | - Olaf Riess
- Department of Medical Genetics, University of Tübingen, Tübingen, Germany
| | - Ulrich Bogdahn
- Department of Neurology, University Hospital Regensburg, Regensburg, Germany
| | - Jürgen Winkler
- Division of Molecular Neurology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Stephan von Hörsten
- Experimental Therapy, Friedrich-Alexander-University Erlangen-Nurnberg, Erlangen, Germany
- * E-mail: (LA); (SvH)
| | - Ludwig Aigner
- Institute of Molecular Regenerative Medicine, Paracelsus Medical University, Salzburg, Austria
- Spinal Cord Injury and Tissue Regeneration Center Salzburg, Paracelsus Medical University, Salzburg, Austria
- * E-mail: (LA); (SvH)
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Narayan S, McLean C, Sawa A, Lin SY, Rai N, Hipolito MS, Cascella N, Nurnberger JJI, Ishizuka K, Nwulia EA. Olfactory neurons obtained through nasal biopsy combined with laser-capture microdissection: a potential approach to study treatment response in mental disorders. J Vis Exp 2014:51853. [PMID: 25549156 PMCID: PMC4396916 DOI: 10.3791/51853] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Bipolar disorder (BD) is a severe neuropsychiatric disorder with poorly understood pathophysiology and typically treated with the mood stabilizer, lithium carbonate. Animal studies as well as human genetic studies indicate that lithium affects molecular targets that are involved in neuronal growth, survival and maturation, and notably molecules involved in Wnt signaling. Given the ethical challenge to obtaining brain biopsies for investigating dynamic molecular changes associated with lithium-response in the central nervous system (CNS), one may consider the use of neurons obtained from olfactory tissues to achieve this goal.The olfactory epithelium contains olfactory receptor neurons at different stages of development and glial-like supporting cells. This provides a unique opportunity to study dynamic changes in the CNS of patients with neuropsychiatric diseases, using olfactory tissue safely obtained from nasal biopsies. To overcome the drawback posed by substantial contamination of biopsied olfactory tissue with non-neuronal cells, a novel approach to obtain enriched neuronal cell populations was developed by combining nasal biopsies with laser-capture microdissection. In this study, a system for investigating treatment-associated dynamic molecular changes in neuronal tissue was developed and validated, using a small pilot sample of BD patients recruited for the study of the molecular mechanisms of lithium treatment response.
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Affiliation(s)
| | - Charlee McLean
- Department of Psychiatry and Behavioral Sciences, Howard University
| | - Akira Sawa
- Department of Psychiatry, Johns Hopkins University
| | - Sandra Y Lin
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University
| | - Narayan Rai
- Department of Psychiatry and Behavioral Sciences, Howard University
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Godoy MDCL, Voegels RL, Pinna FDR, Imamura R, Farfel JM. Olfaction in neurologic and neurodegenerative diseases: a literature review. Int Arch Otorhinolaryngol 2014; 19:176-9. [PMID: 25992176 PMCID: PMC4399182 DOI: 10.1055/s-0034-1390136] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Accepted: 07/27/2014] [Indexed: 11/21/2022] Open
Abstract
Introduction Loss of smell is involved in various neurologic and neurodegenerative diseases, such as Parkinson disease and Alzheimer disease. However, the olfactory test is usually neglected by physicians at large. Objective The aim of this study was to review the current literature about the relationship between olfactory dysfunction and neurologic and neurodegenerative diseases. Data Synthesis Twenty-seven studies were selected for analysis, and the olfactory system, olfaction, and the association between the olfactory dysfunction and dementias were reviewed. Furthermore, is described an up to date in olfaction. Conclusion Otolaryngologist should remember the importance of olfaction evaluation in daily practice. Furthermore, neurologists and physicians in general should include olfactory tests in the screening of those at higher risk of dementia.
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Affiliation(s)
| | - Richard Louis Voegels
- Department of Otorhinolaryngology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Fábio de Rezende Pinna
- Department of Otorhinolaryngology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Rui Imamura
- Department of Otorhinolaryngology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - José Marcelo Farfel
- Department of Geriatrics, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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Oliveira-Pinto AV, Santos RM, Coutinho RA, Oliveira LM, Santos GB, Alho ATL, Leite REP, Farfel JM, Suemoto CK, Grinberg LT, Pasqualucci CA, Jacob-Filho W, Lent R. Sexual dimorphism in the human olfactory bulb: females have more neurons and glial cells than males. PLoS One 2014; 9:e111733. [PMID: 25372872 PMCID: PMC4221136 DOI: 10.1371/journal.pone.0111733] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 10/06/2014] [Indexed: 11/30/2022] Open
Abstract
Sex differences in the human olfactory function reportedly exist for olfactory sensitivity, odorant identification and memory, and tasks in which odors are rated based on psychological features such as familiarity, intensity, pleasantness, and others. Which might be the neural bases for these behavioral differences? The number of cells in olfactory regions, and especially the number of neurons, may represent a more accurate indicator of the neural machinery than volume or weight, but besides gross volume measures of the human olfactory bulb, no systematic study of sex differences in the absolute number of cells has yet been undertaken. In this work, we investigate a possible sexual dimorphism in the olfactory bulb, by quantifying postmortem material from 7 men and 11 women (ages 55–94 years) with the isotropic fractionator, an unbiased and accurate method to estimate absolute cell numbers in brain regions. Female bulbs weighed 0.132 g in average, while male bulbs weighed 0.137 g, a non-significant difference; however, the total number of cells was 16.2 million in females, and 9.2 million in males, a significant difference of 43.2%. The number of neurons in females reached 6.9 million, being no more than 3.5 million in males, a difference of 49.3%. The number of non-neuronal cells also proved higher in women than in men: 9.3 million and 5.7 million, respectively, a significant difference of 38.7%. The same differences remained when corrected for mass. Results demonstrate a sex-related difference in the absolute number of total, neuronal and non-neuronal cells, favoring women by 40–50%. It is conceivable that these differences in quantitative cellularity may have functional impact, albeit difficult to infer how exactly this would be, without knowing the specific circuits cells make. However, the reported advantage of women as compared to men may stimulate future work on sex dimorphism of synaptic microcircuitry in the olfactory bulb.
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Affiliation(s)
- Ana V. Oliveira-Pinto
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Raquel M. Santos
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renan A. Coutinho
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Lays M. Oliveira
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Gláucia B. Santos
- Aging Brain Study Group, University of São Paulo Medical School, São Paulo, Brazil
- Brain Institute, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Ana T. L. Alho
- Aging Brain Study Group, University of São Paulo Medical School, São Paulo, Brazil
- Brain Institute, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Renata E. P. Leite
- Aging Brain Study Group, University of São Paulo Medical School, São Paulo, Brazil
| | - José M. Farfel
- Aging Brain Study Group, University of São Paulo Medical School, São Paulo, Brazil
- Discipline of Geriatrics, University of São Paulo Medical School, São Paulo, Brazil
| | - Claudia K. Suemoto
- Aging Brain Study Group, University of São Paulo Medical School, São Paulo, Brazil
- Discipline of Geriatrics, University of São Paulo Medical School, São Paulo, Brazil
| | - Lea T. Grinberg
- Aging Brain Study Group, University of São Paulo Medical School, São Paulo, Brazil
- Department of Neurology and Pathology, University of California San Francisco, San Francisco, United States of America
| | | | - Wilson Jacob-Filho
- Aging Brain Study Group, University of São Paulo Medical School, São Paulo, Brazil
- Discipline of Geriatrics, University of São Paulo Medical School, São Paulo, Brazil
| | - Roberto Lent
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- National Institute of Translational Neuroscience, Ministry of Science and Technology, São Paulo, Brazil
- * E-mail:
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45
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Olfactory neuroepithelium as a cellular model for the diagnosis of neuropsychiatric diseases. Pharm Pat Anal 2014; 3:39-52. [PMID: 24354978 DOI: 10.4155/ppa.13.68] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The neuroepithelium has been used as an experimental model to find biological markers for neuropsychiatric disease diagnosis. Patent information permits understanding of the state of the art of neuroepithelium in neuropsychiatric disease diagnosis, as well as the identification of trends in research and development on this theme. In this article, we discuss diverse methods for obtaining primary cultures of olfactory neurons obtained by animal dissection or by postmortem biopsy of human cadavers. The principal owners of patents related to olfactory neuroepithelia are universities such as John Hopkins and Bristol-Myers Squibb. The USA has the most research lines and approved patents in the world, while Rutgers, the State University of New Jersey, provides composition and methods related to the diagnoses and treatment of neuropsychiatric disorders.
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46
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Brann JH, Firestein SJ. A lifetime of neurogenesis in the olfactory system. Front Neurosci 2014; 8:182. [PMID: 25018692 PMCID: PMC4071289 DOI: 10.3389/fnins.2014.00182] [Citation(s) in RCA: 136] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 06/09/2014] [Indexed: 12/11/2022] Open
Abstract
Neurogenesis continues well beyond embryonic and early postnatal ages in three areas of the nervous system. The subgranular zone supplies new neurons to the dentate gyrus of the hippocampus. The subventricular zone supplies new interneurons to the olfactory bulb, and the olfactory neuroepithelia generate new excitatory sensory neurons that send their axons to the olfactory bulb. The latter two areas are of particular interest as they contribute new neurons to both ends of a first-level circuit governing olfactory perception. The vomeronasal organ and the main olfactory epithelium comprise the primary peripheral olfactory epithelia. These anatomically distinct areas share common features, as each exhibits extensive neurogenesis well beyond the juvenile phase of development. Here we will discuss the effect of age on the structural and functional significance of neurogenesis in the vomeronasal and olfactory epithelia, from juvenile to advanced adult ages, in several common model systems. We will next discuss how age affects the regenerative capacity of these neural stem cells in response to injury. Finally, we will consider the integration of newborn neurons into an existing circuit as it is modified by the age of the animal.
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Affiliation(s)
- Jessica H Brann
- Department of Biology, Loyola University Chicago Chicago, IL, USA
| | - Stuart J Firestein
- Department of Biological Sciences, Columbia University New York, NY, USA ; Department of Neuroscience, Columbia University New York, NY, USA
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Chen CR, Kachramanoglou C, Li D, Andrews P, Choi D. Anatomy and cellular constituents of the human olfactory mucosa: a review. J Neurol Surg B Skull Base 2014; 75:293-300. [PMID: 25302141 DOI: 10.1055/s-0033-1361837] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2012] [Accepted: 10/07/2013] [Indexed: 02/02/2023] Open
Abstract
Studies using animal models have recently suggested that the olfactory mucosa may be a source of cells capable of stimulating and contributing to complex neurologic regeneration. Several groups have already transplanted cell derivatives from the olfactory mucosa into injury models, and the results so far have been promising. To fully appreciate the meaning of these experiments, a better understanding of the cellular biology and physiology of the olfactory system is necessary. It is therefore of utmost importance for us to first identify and understand its constituents.
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Affiliation(s)
- C Russell Chen
- Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom
| | - Carolina Kachramanoglou
- Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom
| | - Daqing Li
- Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom
| | - Peter Andrews
- Department of ENT, Royal National Throat Nose and Ear Hospital, London, United Kingdom
| | - David Choi
- Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom
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Kamath V, Turetsky BI, Calkins ME, Kohler CG, Conroy CG, Borgmann-Winter K, Gatto DE, Gur RE, Moberg PJ. Olfactory processing in schizophrenia, non-ill first-degree family members, and young people at-risk for psychosis. World J Biol Psychiatry 2014; 15:209-18. [PMID: 22070564 PMCID: PMC3922881 DOI: 10.3109/15622975.2011.615862] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES While deficits in odor identification and discrimination have been reported in schizophrenia, few studies have examined the relative specificity of these deficits in patients and at-risk youth. METHOD Sniffin' Sticks odor identification and discrimination were assessed in schizophrenia outpatients and non-ill first-degree relatives (Study One), as well as youth at clinical (CR) or genetic (GR) risk for schizophrenia (Study Two). Scores were z-transformed, using the performance of a demographically-matched adult or adolescent comparison group. RESULTS Patients and relatives were impaired on odor identification, but odor discrimination impairment was limited to the patient group. A similar pattern of impairment emerged in at-risk youth. GR youth were impaired on odor identification but not discrimination, while CR youth were impaired on both tasks. In patients, olfactory impairment was correlated with negative symptomatology. CONCLUSIONS To our knowledge, this is the first study to show that CR youth are impaired on both olfactory tasks, as observed in adult schizophrenia patients. GR youth were impaired only on odor identification like their adult counterparts. These data suggest that odor identification impairment, in isolation, may represent a genetic marker of vulnerability for schizophrenia, while odor discrimination deficits may be a biomarker associated with the development of psychosis.
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Affiliation(s)
- Vidyulata Kamath
- Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA USA,Correspondence to: Vidya Kamath, Ph.D., Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania Medical Center, 3400 Spruce Street, 10 Floor – Gates Building, Philadelphia, PA 19104. Telephone: 215.839.9193 Fax: 215.662.7903
| | - Bruce I. Turetsky
- Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA USA,Smell and Taste Center, Department of Otorhinolaryngology: Head & Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Monica E. Calkins
- Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Christian G. Kohler
- Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Catherine G. Conroy
- Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Karin Borgmann-Winter
- Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA USA,Children’s Hospital of Philadelphia, Philadelphia, PA
| | - Dana E. Gatto
- Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Raquel E. Gur
- Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA USA,Department of Radiology, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Paul J. Moberg
- Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, Philadelphia, PA USA,Smell and Taste Center, Department of Otorhinolaryngology: Head & Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, PA USA
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Thakur A, Muniswami D, Tharion G, Kanakasabapathy I. Isolating globose Basal stem cells from albino wistar rats using a highly specific monoclonal antibody. J Clin Diagn Res 2014; 7:2419-22. [PMID: 24392361 DOI: 10.7860/jcdr/2013/6372.3562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Accepted: 08/18/2013] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Olfactory mucosa which is situated in the roof of the nasal cavity possesses an extremely peculiar and exceptional type of pluripotent stem cells called Globose Basal Cells (GBCs) which help in lifelong regeneration of the olfactory mucosa. Previous literature doesn't provide much knowledge on the cytological, histochemical and electrophysiological properties of these cells, as they have never been isolated in pure form. MATERIAL AND METHODS Olfactory mucosa was obtained from six Albino Wistar rats by using standardized surgical and chemical separation procedures. GBCs were isolated by using different chemical, surgical and fluorescent techniques. RESULTS In this research work, we standardized the techniques for isolating these stem cells in pure form from rat olfactory mucosa by tagging them with GBC-III antibody and separating them from other epithelial cells by using Fluorescence Activated Cell Sorter (FACS). GBC-III antibody is a mouse monoclonal IgM antibody which recognizes a 40 kDa surface antigen, which is a laminin receptor surface protein present on the GBCs. It is a highly specific marker for GBCs, unlike the earlier antibodies used, like GBC-I, which were nonspecific markers for GBCs and showed positive reactions, even with Horizontal Basal Cells (HBCs), sustentacular cells (Sus) and duct cells. This study also standardized the techniques for surgically excising the olfactory mucosa from the nasal septum and chemically separating the olfactory epithelium from the lamina propria. CONCLUSION GBCs are an important group of cells which can be exploited in future to study and treat neuro-degenerative disorders like multiple sclerosis, brain ischaemia, etc. and spinal cord trauma, as they reside in a niche similar to the microenvironment in the central nervous system and have the similar ectodermal development as the neuronal and non-neuronal cells of the CNS. Moreover, olfactory epithelium is easily accessible for autologous transplantation of GBCs for different CNS disorders.
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Affiliation(s)
- Avinash Thakur
- Assistant Professor, Department of Anatomy, Vardhman Mahavir Medical College & Safdarjung Hospital , New Delhi- 110029, India
| | - Duraimurugan Muniswami
- Faculty, Department of Physical Medicine and Rehabilitation, Christian Medical College Vellore, India
| | - George Tharion
- Professor, Department of Physical Medicine and Rehabilitation, Christian Medical College , Vellore, India
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Brown AS, Borgmann-Winter K, Hahn CG, Role L, Talmage D, Gur R, Chow J, Prado P, McCloskey T, Bao Y, Bulinski JC, Dwork AJ. Increased stability of microtubules in cultured olfactory neuroepithelial cells from individuals with schizophrenia. Prog Neuropsychopharmacol Biol Psychiatry 2014; 48:252-258. [PMID: 24513021 PMCID: PMC3999307 DOI: 10.1016/j.pnpbp.2013.10.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 10/11/2013] [Accepted: 10/17/2013] [Indexed: 01/08/2023]
Abstract
Microtubules (MTs) are essential components of the cytoskeleton that play critical roles in neurodevelopment and adaptive central nervous system functioning. MTs are essential to growth cone advance and ultrastructural events integral to synaptic plasticity; these functions figure significantly into current pathophysiologic conceptualizations of schizophrenia. To date, no study has directly investigated MT dynamics in humans with schizophrenia. We therefore compared the stability of MTs in olfactory neuroepithelial (OE) cells between schizophrenia cases and matched nonpsychiatric comparison subjects. For this purpose, we applied nocodazole (Nz) to cultured OE cells obtained from tissue biopsies from seven living schizophrenia patients and seven matched comparison subjects; all schizophrenia cases were on antipsychotic medications. Nz allows MT depolymerization to be followed but prevents repolymerization, so that in living cells treated for varying time intervals, the MTs that are stable for a given treatment interval remain. Our readout of MT stability was the time at which fewer than 10 MTs per cell could be distinguished by anti-β-tubulin immunofluorescence. The percentage of cells with ≥10 intact MTs at specified intervals following Nz treatment was estimated by systematic uniform random sampling with Visiopharm software. These analyses showed that the mean percentages of OE cells with intact MTs were significantly greater for schizophrenia cases than for the matched comparison subjects at 10, 15, and 30min following Nz treatment indicating increased MT stability in OE cells from schizophrenia patients (p=0.0007 at 10min; p=0.0008 at 15min; p=0.036 at 30min). In conclusion, we have demonstrated increased MT stability in nearly all cultures of OE cells from individuals with schizophrenia, who received several antipsychotic treatments, versus comparison subjects matched for age and sex. While we cannot rule out a possible confounding effect of antipsychotic medications, these findings may reflect analogous neurobiological events in at least a subset of immature neurons or other cell types during gestation, or newly generated cells destined for the olfactory bulb or hippocampus, suggesting a mechanism that underlies findings of postmortem and neuroimaging investigations of schizophrenia. Future studies aimed at replicating these findings, including samples of medication-naïve subjects with schizophrenia, and reconciling the results with other studies, will be necessary. Although the observed abnormalities may suggest one of a number of putative pathophysiologic anomalies in schizophrenia, this work may ultimately have implications for an improved understanding of pathogenic processes related to this disorder.
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Affiliation(s)
- Alan S. Brown
- Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York State Psychiatric Institute, 1051 Riverside Drive, New York, NY 10032, USA,Department of Epidemiology, Columbia University Mailman School of Public Health, 722 W 168th Street, New York, NY 10032, USA,For correspondence regarding the manuscript or requests for reprints, please contact Dr. Alan Brown at New York State Psychiatric Institute, 1051 Riverside Drive, Unit 23, New York, NY 10032; phone: 1-212-543-5629;
| | - Karin Borgmann-Winter
- Cellular and Molecular Neuropathology Program, Center for Neurobiology and Behavior, Department of Psychiatry, University of Pennsylvania, 125 South 31st Street, Philadelphia, PA 19104, USA
| | - Chang-Gyu Hahn
- Cellular and Molecular Neuropathology Program, Center for Neurobiology and Behavior, Department of Psychiatry, University of Pennsylvania, 125 South 31st Street, Philadelphia, PA 19104, USA
| | - Lorna Role
- Department of Neurobiology and Behavior, State University of New York at Stony Brook, Stony Brook, NY 11794, USA
| | - David Talmage
- Department of Pharmacology, State University of New York at Stony Brook, Basic Science Tower 8-140, Stony Brook, NY11794, USA
| | - Raquel Gur
- Departments of Psychiatry, Neurology, and Radiology, University of Pennsylvania Medical Center, 10th Floor, Gates Building, Philadelphia, PA 19104, USA
| | - Jacky Chow
- Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York State Psychiatric Institute, 1051 Riverside Drive, New York, NY 10032, USA
| | - Patric Prado
- Department of Epidemiology, Columbia University Mailman School of Public Health, 722 W 168th Street, New York, NY 10032, USA
| | - Thelma McCloskey
- Cellular and Molecular Neuropathology Program, Center for Neurobiology and Behavior, Department of Psychiatry, University of Pennsylvania, 125 South 31st Street, Philadelphia, PA 19104, USA
| | - Yuanyuan Bao
- Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York State Psychiatric Institute, 1051 Riverside Drive, New York, NY 10032, USA
| | - J. Chloe Bulinski
- Department of Biological Sciences, Columbia University, 1212 Amsterdam Avenue, New York, NY 10027, USA
| | - Andrew J. Dwork
- Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York State Psychiatric Institute, 1051 Riverside Drive, New York, NY 10032, USA,Department of Pathology and Cell Biology, Columbia University, 1051 Riverside Drive, New York, NY 10032, USA,Macedonian Academy of Sciences and Arts, Skopje 1000, Macedonia
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