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Bastedo WE, Scott RW, Arostegui M, Underhill TM. Single-cell analysis of mesenchymal cells in permeable neural vasculature reveals novel diverse subpopulations of fibroblasts. Fluids Barriers CNS 2024; 21:31. [PMID: 38575991 PMCID: PMC10996213 DOI: 10.1186/s12987-024-00535-7] [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: 07/31/2023] [Accepted: 03/25/2024] [Indexed: 04/06/2024] Open
Abstract
BACKGROUND In the choroid plexus and pituitary gland, vasculature is known to have a permeable, fenestrated phenotype which allows for the free passage of molecules in contrast to the blood brain barrier observed in the rest of the CNS. The endothelium of these compartments, along with secretory, neural-lineage cells (choroid epithelium and pituitary endocrine cells) have been studied in detail, but less attention has been given to the perivascular mesenchymal cells of these compartments. METHODS The Hic1CreERT2 Rosa26LSL-TdTomato mouse model was used in conjunction with a PdgfraH2B-EGFP mouse model to examine mesenchymal cells, which can be subdivided into Pdgfra+ fibroblasts and Pdgfra- pericytes within the choroid plexus (CP) and pituitary gland (PG), by histological, immunofluorescence staining and single-cell RNA-sequencing analyses. RESULTS We found that both CP and PG possess substantial populations of distinct Hic1+ mesenchymal cells, including an abundance of Pdgfra+ fibroblasts. Within the pituitary, we identified distinct subpopulations of Hic1+ fibroblasts in the glandular anterior pituitary and the neurosecretory posterior pituitary. We also identified multiple distinct markers of CP, PG, and the meningeal mesenchymal compartment, including alkaline phosphatase, indole-n-methyltransferase and CD34. CONCLUSIONS Novel, distinct subpopulations of mesenchymal cells can be found in permeable vascular interfaces, including the CP, PG, and meninges, and make distinct contributions to both organs through the production of structural proteins, enzymes, transporters, and trophic molecules.
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Affiliation(s)
- William E Bastedo
- Department of Cellular and Physiological Sciences, University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
| | - R Wilder Scott
- Department of Cellular and Physiological Sciences, University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
- School of Biomedical Engineering and the Biomedical Research Centre, University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Martin Arostegui
- Department of Cellular and Physiological Sciences, University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada
| | - T Michael Underhill
- Department of Cellular and Physiological Sciences, University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada.
- School of Biomedical Engineering and the Biomedical Research Centre, University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z3, Canada.
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Neurotoxic Effects of Neonicotinoids on Mammals: What Is There beyond the Activation of Nicotinic Acetylcholine Receptors?-A Systematic Review. Int J Mol Sci 2021; 22:ijms22168413. [PMID: 34445117 PMCID: PMC8395098 DOI: 10.3390/ijms22168413] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 07/29/2021] [Accepted: 08/02/2021] [Indexed: 02/07/2023] Open
Abstract
Neonicotinoids are a class of insecticides that exert their effect through a specific action on neuronal nicotinic acetylcholine receptors (nAChRs). The success of these insecticides is due to this mechanism of action, since they act as potent agonists of insect nAChRs, presenting low affinity for vertebrate nAChRs, which reduces potential toxic risk and increases safety for non-target species. However, although neonicotinoids are considered safe, their presence in the environment could increase the risk of exposure and toxicity. On the other hand, although neonicotinoids have low affinity for mammalian nAChRs, the large quantity, variety, and ubiquity of these receptors, combined with its diversity of functions, raises the question of what effects these insecticides can produce in non-target species. In the present systematic review, we investigate the available evidence on the biochemical and behavioral effects of neonicotinoids on the mammalian nervous system. In general, exposure to neonicotinoids at an early age alters the correct neuronal development, with decreases in neurogenesis and alterations in migration, and induces neuroinflammation. In adulthood, neonicotinoids induce neurobehavioral toxicity, these effects being associated with their modulating action on nAChRs, with consequent neurochemical alterations. These alterations include decreased expression of nAChRs, modifications in acetylcholinesterase activity, and significant changes in the function of the nigrostriatal dopaminergic system. All these effects can lead to the activation of a series of intracellular signaling pathways that generate oxidative stress, neuroinflammation and, finally, neuronal death. Neonicotinoid-induced changes in nAChR function could be responsible for most of the effects observed in the different studies.
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Zhou D, Liu J, Hang Y, Li T, Li P, Guo S, Liu T, Xia Z, Wang Y. TMT-based proteomics analysis reveals the protective effects of Xuefu Zhuyu decoction in a rat model of traumatic brain injury. JOURNAL OF ETHNOPHARMACOLOGY 2020; 258:112826. [PMID: 32298754 DOI: 10.1016/j.jep.2020.112826] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 03/26/2020] [Accepted: 03/31/2020] [Indexed: 06/11/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Xuefu Zhuyu decoction (XFZYD) is a traditional Chinese herbal prescription. It is effective in treating traumatic brain injury (TBI). However, the underlying molecular mechanisms remain unclear. AIM OF THE STUDY This study aimed to reveal the possible mechanisms of XFZYD in treating acute TBI through proteomics clues. MATERIALS AND METHODS Controlled Cortical Impact (CCI) rats were given gavage administration of XFZYD (9 g/kg/d) or distilled water (equal volume) for three days. The Modified Neurological Severity Score (mNSS), brain water content, HE staining, Nissl staining and immunohistochemistry were performed to assess the effects of XFZYD for TBI treatment. Additionally, tandem mass tag-based (TMT) quantitative proteomics technology was applied to detect proteins of brain cortex. Bioinformatics analysis including Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways and Protein-protein interaction (PPI) networks were used to analyze differentially expressed proteins (DEPs). Bioinformatics Analysis Tool for Molecular mechanism of TCM (BATMAN-TCM) was conducted to anchor diseases and pathways. Besides, western blotting and immunofluorescence were exerted to verify related proteins. RESULTS XFZYD improved neurologic functions, reduced encephaledema and ameliorated cell morphology around the injured area in CCI rats. A total of 6099 proteins were identified with false discovery rate (FDR) < 1%. Overlapping DEPs (105 DEPs) were identified (295 DEPs and 804 DEPs in CCI/Sham or XFZYD/CCI group, respectively). Of these DEPs, 17 were regulated by XFZYD. Bioinformatics analysis showed that the 17 DEPs were predominantly related to platelet activation and PI3K-Akt signaling pathway. Next, PLG and CD34 were verified with molecular biotechnology. CONCLUSIONS XFZYD exerts therapeutic effects through multi-pathways regulation in the treatment of TBI. This work may provide proteomics clues for the continuation of research on TBI treatment with XFZYD.
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Affiliation(s)
- Dan Zhou
- Institute of Integrative Medicine, Department of Integrated Traditional Chinese and Western Medicine, Xiangya Hospital, Central South University, 410008, Changsha, PR China
| | - Jiamiao Liu
- Xiangya School of Medicine, Central South University, 410013, Changsha, China
| | - Yang Hang
- Xiangya School of Medicine, Central South University, 410013, Changsha, China
| | - Teng Li
- Institute of Integrative Medicine, Department of Integrated Traditional Chinese and Western Medicine, Xiangya Hospital, Central South University, 410008, Changsha, PR China
| | - Pengfei Li
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, 450052, Zhengzhou, China
| | - Shichao Guo
- Department of Neurosurgery, The First Affiliated Hospital of Zhengzhou University. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University. Zhengzhou, Henan, 450052, Zhengzhou, China
| | - Tao Liu
- Department of Gerontology, Traditional Chinese Medicine Hospital Affiliated to Xinjiang Medical University, 830000, Urumqi, China
| | - Zian Xia
- Institute of Integrative Medicine, Department of Integrated Traditional Chinese and Western Medicine, Xiangya Hospital, Central South University, 410008, Changsha, PR China
| | - Yang Wang
- Institute of Integrative Medicine, Department of Integrated Traditional Chinese and Western Medicine, Xiangya Hospital, Central South University, 410008, Changsha, PR China.
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Srivastava AK, Prabhakara KS, Kota DJ, Bedi SS, Triolo F, Brown KS, Skiles ML, Brown HL, Cox CS, Olson SD. Human umbilical cord blood cells restore vascular integrity in injured rat brain and modulate inflammation in vitro. Regen Med 2019; 14:295-307. [PMID: 31074319 DOI: 10.2217/rme-2018-0106] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Aim: Traumatic brain injury is a complex condition consisting of a mechanical injury with neurovascular disruption and inflammation with limited clinical interventions available. A growing number of studies report systemic delivery of human umbilical cord blood (HUCB) as a therapy for neural injuries. Materials & methods: HUCB cells from five donors were tested to improve blood-brain barrier integrity in a traumatic brain injury rat model at a dose of 2.5 × 107 cells/kg at 24 or 72 h postinjury and for immunomodulatory activity in vitro. Results & Conclusion: We observed that cells delivered 72 h postinjury significantly restored blood-brain barrier integrity. HUCB cells reduced the amount of TNF-α and IFN-γ released by activated primary rat splenocytes, which correlated with the expression of COX2 and IDO1.
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Affiliation(s)
- Amit K Srivastava
- Department of Pediatric Surgery, McGovern Medical School, University of Texas Health Sciences Center at Houston, Houston, TX, 77030, USA
| | - Karthik S Prabhakara
- Department of Pediatric Surgery, McGovern Medical School, University of Texas Health Sciences Center at Houston, Houston, TX, 77030, USA
| | - Daniel J Kota
- Emory Personalized Immunotherapy Core Labs, Emory University, School of Medicine, Atlanta, GA 30322, USA
| | - Supinder S Bedi
- Department of Pediatric Surgery, McGovern Medical School, University of Texas Health Sciences Center at Houston, Houston, TX, 77030, USA
| | - Fabio Triolo
- Department of Pediatric Surgery, McGovern Medical School, University of Texas Health Sciences Center at Houston, Houston, TX, 77030, USA
| | | | | | | | - Charles S Cox
- Department of Pediatric Surgery, McGovern Medical School, University of Texas Health Sciences Center at Houston, Houston, TX, 77030, USA
| | - Scott D Olson
- Department of Pediatric Surgery, McGovern Medical School, University of Texas Health Sciences Center at Houston, Houston, TX, 77030, USA
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Terayama H, Endo H, Tsukamoto H, Matsumoto K, Umezu M, Kanazawa T, Ito M, Sato T, Naito M, Kawakami S, Fujino Y, Tatemichi M, Sakabe K. Acetamiprid Accumulates in Different Amounts in Murine Brain Regions. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13100937. [PMID: 27669271 PMCID: PMC5086676 DOI: 10.3390/ijerph13100937] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 09/12/2016] [Accepted: 09/15/2016] [Indexed: 11/25/2022]
Abstract
Neonicotinoids such as acetamiprid (ACE) belong to a new and widely used single class of pesticides. Neonicotinoids mimic the chemical structure of nicotine and share agonist activity with the nicotine acetylcholine receptor (nAchR). Neonicotinoids are widely considered to be safe in humans; however, they have recently been implicated in a number of human health disorders. A wide range of musculoskeletal and neuromuscular disorders associated with high doses of neonicotinoids administered to animals have also been reported. Consequently, we used a mouse model to investigate the response of the central nervous system to ACE treatment. Our results show that exposure to ACE-containing water for three or seven days (decuple and centuple of no observable adverse effect level (NOAEL)/day) caused a decrease in body weight in 10-week old A/JJmsSlc (A/J) mice. However, the treatments did not affect brain histology or expression of CD34. ACE concentrations were significantly higher in the midbrain of ACE-treated mice than that of the normal and vehicle groups. Expression levels of α7, α4, and β2 nAChRs were found to be low in the olfactory bulb and midbrain of normal mice. Furthermore, in the experimental group (centuple ACE-containing water for seven days), β2 nAChR expression decreased in many brain regions. Information regarding the amount of accumulated ACE and expression levels of the acetylcholine receptor in each region of the brain is important for understanding any clinical symptoms that may be associated with ACE exposure.
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Affiliation(s)
- Hayato Terayama
- Department of Anatomy, Division of Basic Medicine, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
| | - Hitoshi Endo
- Department of Community Health, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
| | - Hideo Tsukamoto
- Support Center for Medical Research and Education, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
| | - Koichi Matsumoto
- Department of Anatomy, Division of Basic Medicine, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
| | - Mai Umezu
- Department of Anatomy, Division of Basic Medicine, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
| | - Teruhisa Kanazawa
- Department of Anatomy, Division of Basic Medicine, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
| | - Masatoshi Ito
- Support Center for Medical Research and Education, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
| | - Tadayuki Sato
- Support Center for Medical Research and Education, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
| | - Munekazu Naito
- Department of Anatomy, Aichi Medical University, Aichi 480-1195, Japan.
| | - Satoshi Kawakami
- Division of Oral and Craniofacial Anatomy, Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan.
| | - Yasuhiro Fujino
- Department of Human Development, Tokai University School of Humanities and Culture, Kanagawa 259-1292, Japan.
| | - Masayuki Tatemichi
- Department of Community Health, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
| | - Kou Sakabe
- Department of Anatomy, Division of Basic Medicine, Tokai University School of Medicine, Kanagawa 259-1193, Japan.
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Elbuken G, Tanriverdi F, Karaca Z, Eser B, Hasdiraz L, Unluhizarci K, Gokoglu A, Cetin A, Selcuklu A, Kelestimur F. Evaluation of peripheral blood CD34+ cell count in the acute phase of traumatic brain injury and chest trauma. Brain Inj 2015; 30:179-83. [PMID: 26649467 DOI: 10.3109/02699052.2015.1090015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AIM To determine the impact of traumatic brain injury (TBI) and chest trauma (CT) on the number of peripheral blood (PB) stem cells in affected patients in comparison to normal controls. Additionally, the aim was to determine the relationship between CD34+ cell counts and TBI-induced hypothalamus-pituitary-adrenal axis dysfunction in the acute phase of trauma. PATIENTS AND METHOD Thirty patients with TBI, 12 patients with CT and 53 healthy subjects were included in the study. RESULTS CD34+ cell counts within the first 24-48 hours of TBI were found to be lower than those obtained on the 7(th) day of TBI and those in the healthy controls. CD34+ cell counts obtained on the 2(nd) day of CT were lower than those in the healthy group, but did not differ from those measured on the 7(th) day of CT. There was no correlation between CD34+ cell counts and serum total cortisol (STC) levels on the 2(nd) and 7(th) days in the TBI or CT groups. CONCLUSION An increase in CD34+ cell counts as observed on the 7(th) day in both TBI and CT groups suggested that CD34 changes were not specific to TBI. Moreover, this study showed for the first time that CD34 response was not affected by changes in cortisol levels induced by TBI and severity of TBI.
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Affiliation(s)
- Gulsah Elbuken
- a Department of Endocrinology and Metabolism , Erciyes University Medical School , Kayseri , Turkey
| | - Fatih Tanriverdi
- a Department of Endocrinology and Metabolism , Erciyes University Medical School , Kayseri , Turkey
| | - Zuleyha Karaca
- a Department of Endocrinology and Metabolism , Erciyes University Medical School , Kayseri , Turkey
| | - Bulent Eser
- b Department of Hematology , Erciyes University Medical School , Kayseri , Turkey
| | - Leyla Hasdiraz
- c Department of Chest Surgery , Erciyes University Medical School , Kayseri , Turkey
| | - Kursad Unluhizarci
- a Department of Endocrinology and Metabolism , Erciyes University Medical School , Kayseri , Turkey
| | - Abdulkerim Gokoglu
- d Department of Neurosurgery , Erciyes University Medical School , Kayseri , Turkey
| | - Aysun Cetin
- e Department of Biochemistry , Erciyes University Medical School , Kayseri , Turkey
| | - Ahmet Selcuklu
- d Department of Neurosurgery , Erciyes University Medical School , Kayseri , Turkey
| | - Fahrettin Kelestimur
- a Department of Endocrinology and Metabolism , Erciyes University Medical School , Kayseri , Turkey
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