ArticleThe Journal of biological chemistry2014
The duplicated α7 subunits assemble and form functional nicotinic receptors with the full-length α7.
Article in The Journal of biological chemistry, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers.
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Who cites it
52 citing papers in PubMed, 91 citations in OpenAlex.
- Proteomic profiling reveals structural and adhesion pathways regulated by the inverted CHRFAM7AΔ2bp variant in human neural progenitor cells.BMC neuroscience · 2026Article
- AAV.PHP.eB-based strategies for precise modulation of α7 nicotinic acetylcholine receptor in neurons and astrocytes in the adult mouse brain.Scientific reports · 2026Article
- Activation of the alpha 7 nicotinic acetylcholine receptor (CHRNA7) limits hypoxia-induced inflammatory responses and regulates collagens in cultured human granulosa cells†.Biology of reproduction · 2026Article
- CHRFAM7A diversifies human immune adaption through CaEBioMedicine · 2024Article
- Contributions of Non-Neuronal Cholinergic Systems to the Regulation of Immune Cell Function, Highlighting the Role of α7 Nicotinic Acetylcholine Receptors.International journal of molecular sciences · 2024Review
- Translational implications of CHRFAM7A, an elusive human-restricted fusion gene.Molecular psychiatry · 2024Review
- Article
- Human restrictedFrontiers in neuroscience · 2024Article
- GTS-21 Enhances Regulatory T Cell Development from T Cell Receptor-Activated Human CD4International journal of molecular sciences · 2023Article
- α7- and α9-Containing Nicotinic Acetylcholine Receptors in the Functioning of Immune System and in Pain.International journal of molecular sciences · 2023Review
- Up-regulation of the human-specific CHRFAM7A gene protects against renal fibrosis in mice with obstructive nephropathy.Journal of cellular and molecular medicine · 2023Article
- Physiologic Functions and Therapeutic Applications of α7 Nicotinic Acetylcholine Receptor in Brain Disorders.Pharmaceutics · 2022Review
- The Human-Restricted Isoform of the α7 nAChR, CHRFAM7A: A Double-Edged Sword in Neurological and Inflammatory Disorders.International journal of molecular sciences · 2022Review
- Deepening the understanding of CNVs on chromosome 15q11-13 by using hiPSCs: An overview.Frontiers in cell and developmental biology · 2022Review
- Altered neuronal physiology, development, and function associated with a common chromosome 15 duplication involving CHRNA7.BMC biology · 2021Article
- Regulation of Immune Functions by Non-Neuronal Acetylcholine (ACh) via Muscarinic and Nicotinic ACh Receptors.International journal of molecular sciences · 2021Review
- α7 Nicotinic acetylcholine receptor mediates right ventricular fibrosis and diastolic dysfunction in pulmonary hypertension.JCI insight · 2021Article
- Aβ1-16 controls synaptic vesicle pools at excitatory synapses via cholinergic modulation of synapsin phosphorylation.Cellular and molecular life sciences : CMLS · 2021Article
- Cholinergic Modulation of Neuroinflammation: Focus on α7 Nicotinic Receptor.International journal of molecular sciences · 2021Review
- Article
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
Abstract
The α7 nicotinic acetylcholine receptor gene (CHRNA7) is linked to schizophrenia. A partial duplication of CHRNA7 (CHRFAM7A) is found in humans on 15q13-14. Exon 6 of CHRFAM7A harbors a 2-bp deletion polymorphism, CHRFAM7AΔ2bp, which is also associated with schizophrenia. To understand the effects of the duplicated subunits on α7 receptors, we fused α7, dupα7, and dupΔα7 subunits with various fluorescent proteins. The duplicated subunits co-localized with full-length α7 subunits in mouse neuroblastoma cells (Neuro2a) as well as rat hippocampal neurons. We investigated the interaction between the duplicated subunits and full-length α7 by measuring Förster resonance energy transfer using donor recovery after photobleaching and fluorescence lifetime imaging microscopy. The results revealed that the duplicated proteins co-assemble with α7. In electrophysiological studies, Leu at the 9'-position in the M2 membrane-spanning segment was replaced with Cys in dupα7 or dupΔα7, and constructs were co-transfected with full-length α7 in Neuro2a cells. Exposure to ethylammonium methanethiosulfonate inhibited acetylcholine-induced currents, showing that the assembled functional nicotinic acetylcholine receptors (nAChRs) included the duplicated subunit. Incorporation of dupα7 and dupΔα7 subunits modestly changes the sensitivity of receptors to choline and varenicline. Thus, the duplicated proteins are assembled and transported to the cell membrane together with full-length α7 subunits and alter the function of the nAChRs. The characterization of dupα7 and dupΔα7 as well as their influence on α7 nAChRs may help explain the pathophysiology of schizophrenia and may suggest therapeutic strategies.
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