Cited by 450Obsessive-Compulsive Spectrum DisordersNeuroinflammation and Neurodegeneration MechanismsNeurogenesis and neuroplasticity mechanisms

Hematopoietic origin of pathological grooming in Hoxb8 mutant mice

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Chen, Shau-Kwaun, Tvrdik, Petr, Peden, Erik, Cho, Scott, Wu, Sen, Spangrude, Gerald, Capecchi, Mario R.·2010·Cell

Abstract

Mouse Hoxb8 mutants show unexpected behavior manifested by compulsive grooming and hair removal, similar to behavior in humans with the obsessive-compulsive disorder spectrum disorder trichotillomania. As Hox gene disruption often has pleiotropic effects, the root cause of this behavioral deficit was unclear. Here we report that, in the brain, Hoxb8 cell lineage exclusively labels bone marrow-derived microglia. Furthermore, transplantation of wild-type bone marrow into Hoxb8 mutant mice rescues their pathological phenotype. It has been suggested that the grooming dysfunction results from a nociceptive defect, also exhibited by Hoxb8 mutant mice. However, bone marrow transplant experiments and cell type-specific disruption of Hoxb8 reveal that these two phenotypes are separable, with the grooming phenotype derived from the hematopoietic lineage and the sensory defect derived from the spinal cord cells. Immunological dysfunctions have been associated with neuropsychiatric disorders, but the causative relationships are unclear. In this mouse, a distinct compulsive behavioral disorder is associated with mutant microglia.

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Crossref · 10.1016/j.cell.2010.03.055

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  • Recent data from genome-wide association studies and analyses of postmortem human brain tissue have suggested that microglia and/or the complement cascade may also be involved in the development and pathogenesis of neurodevelopmental and psychiatric disorders.

    “In addition to diseases associated with neurodegeneration, recent data from genome-wide association studies and analyses of postmortem human brain tissue have suggested that microglia and/or the complement cascade may also be involved in the development and pathogenesis of neurodevelopmental and psychiatric disorders (e.g., autism, obsessive compulsive disorder, schizophrenia, etc.) (Chen et al.,”

    From Microglia Sculpt Postnatal Neural Circuits in an Activity and Complement-Dependent Manner (2012) · cites this paper as Chen et al., 2010

    The Introduction (page unavailable) reports that genome-wide association studies implicate immune-related genes in susceptibility to psychiatric disorders, and the Discussion links defective microglia to pathological grooming in mice. The paper does not report analyses of postmortem human brain tissue or implicate the complement cascade, so it supports only part of the attributed claim. (LLM, conf=0.88)

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  • Knockout of the developmentally expressed Hoxb8lox gene leads to perseverative grooming, which is reversed by bone marrow transplant from wild-type mice.

    “knockout of the developmentally expressed Hoxb8lox gene leads to perseverative grooming, which is surprisingly reversed by bone marrow transplant from wild-type mice 89”
  • Mice lacking Hoxb8 in all cells or only in myeloid and endothelial cells spend twice as much time grooming as littermates, leading to hair loss and skin lesions reminiscent of trichotillomania.

    “Mice lacking the homeobox gene Hoxb8 in all cells or only in myeloid and endothelial cells spend twice as much time grooming as do their littermates, leading to hair loss and skin lesions reminiscent of a human compulsive disorder known as trichotillomania (175).”

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Authors
Chen, S.-K., Tvrdik, P., Peden, E., Cho, S., Wu, S., Spangrude, G., & Capecchi, M. R.
Affiliations
  • Howard Hughes Medical Institute (US)
  • University of Utah (US)
Corresponding author
Capecchi, Mario R.
Venue
Cell
Publisher
Elsevier BV
Published
2010-05
Volume
141
Issue
5
Pages
775-785
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2117434453
Cited by
450
References
42
Citations by year
2026: 11 · 2025: 11 · 2024: 23 · 2023: 20 · 2022: 16 · 2021: 27 · 2020: 19 · 2019: 24 · 2018: 24 · 2017: 37 · 2016: 27 · 2015: 32 · 2014: 42 · 2013: 51 · 2012: 46
FWCI
48.26
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute
  • National Institute of General Medical Sciences (R01GM021168)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R37HD030701)
Topics
  • Social Sciences › Psychology › Clinical Psychology › Obsessive-Compulsive Spectrum Disorders
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
Keywords
Hoxb8, trichotillomania, compulsive behavior, microglia, hematopoietic origin, bone marrow transplantation, nociception, neuropsychiatric disorders, immune dysfunction
MeSH terms
Animals, B-Lymphocytes, Behavior, Animal, Brain, Grooming, Humans, Obsessive-Compulsive Disorder, Spinal Cord, T-Lymphocytes, Bone Marrow Transplantation, Microglia, Homeodomain Proteins, Mice

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