Cited by 47Schizophrenia research and treatmentProteoglycans and glycosaminoglycans researchOlfactory and Sensory Function Studies

Proteoglycan abnormalities in olfactory epithelium tissue from subjects diagnosed with schizophrenia

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Pantazopoulos, Harry, Boyer-Boiteau, Anne, Holbrook, Eric H., Jang, Woochan, Hahn, Chang-Gyu, Arnold, Steven E., Berretta, Sabina·2013·Schizophrenia Research

Abstract

Emerging evidence points to proteoglycan abnormalities in the pathophysiology of schizophrenia (SZ). In particular, markedly abnormal expression of chondroitin sulfate proteoglycans (CSPGs), key components of the extracellular matrix, was observed in the medial temporal lobe. CSPG functions, including regulation of neuronal differentiation and migration, are highly relevant to the pathophysiology of SZ. CSPGs may exert similar functions in the olfactory epithelium (OE), a continuously regenerating neural tissue that shows cell and molecular abnormalities in SZ. We tested the hypothesis that CSPG expression in OE may be altered in SZ. CSPG-positive cells in postmortem OE from non-psychiatric control (n=9) and SZ (n=10) subjects were counted using computer-assisted light microscopy. 'Cytoplasmic' CSPG (c-CSPG) labeling was detected in sustentacular cells and some olfactory receptor neurons (c-CSPG+ORNs), while 'pericellular' CSPG (p-CSPG) labeling was found in basal cells and some ORNs (p-CSPG+ORNs). Dual labeling for CSPG and markers for mature and immature ORNs suggests that c-CSPG+ORNs correspond to mature ORNs, and p-CSPG+ORNs to immature ORNs. Previous studies in the same cohort demonstrated that densities of mature ORNs were unaltered (Arnold et al., 2001). In the present study, numerical densities of c-CSPG+ORNs were significantly decreased in SZ (p<0.025; 99.32% decrease), suggesting a reduction of CSPG expression in mature ORNs. Previous studies showed a striking increase in the ratios of immature neurons with respect to basal cells. In this study, we find that the ratio of p-CSPG+ORNs/CSPG+basal cells was significantly increased (p=0.03) in SZ, while numerical density changes of p-CSPG+ORNs (110.71% increase) or CSPG+basal cells (53.71% decrease), did not reach statistical significance. Together, these results indicate that CSPG abnormalities are present in the OE of SZ and specifically point to a reduction of CSPG expression in mature ORNs in SZ. Given the role CSPGs play in OE cell differentiation and axon guidance, we suggest that altered CSPG expression may contribute to ORN lineage dysregulation, and olfactory identification abnormalities, observed in SZ.

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Crossref · 10.1016/j.schres.2013.08.013

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  • CSPGs are involved in the pathophysiology of schizophrenia.

    “Emerging evidence from human postmortem, animal model and genetic studies points to their involvement in the pathophysiology of schizophrenia (SZ).1, 2, 3, 4, 5, 6, 7”
  • Human post-mortem studies show disease-specific reduction in PNN density and altered expression of genes regulating PNNs/ECM in amygdala, olfactory epithelium, entorhinal cortex, superior temporal cortex, and prefrontal cortex in schizophrenia.

    “a number of human post-mortem brain studies have revealed a disease-specific reduction in the density of PNNs as well as altered expression of genes that regulate PNNs and ECM in key brain structures associated with schizophrenia, including the amygdala, olfactory epithelium, entorhinal cortex, superior temporal cortex and prefrontal cortex”

    From Perineuronal nets and schizophrenia: The importance of neuronal coatings (2014) · cites this paper as Pantazopoulos et al., 2013

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Authors
Pantazopoulos, H., Boyer-Boiteau, A., Holbrook, E. H., Jang, W., Hahn, C.-G., Arnold, S. E., & Berretta, S.
Affiliations
  • Harvard University (US)
  • Tufts University (US)
  • University of Pennsylvania (US)
Corresponding author
Berretta, Sabina
Venue
Schizophrenia Research
Publisher
Elsevier BV
Published
2013-11
Volume
150
Issue
2-3
Pages
366-372
ISSN
0920-9964 (ISSN-L)
OpenAlex
W2020188570
Cited by
47
References
51
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 6 · 2021: 4 · 2020: 3 · 2019: 3 · 2018: 6 · 2017: 4 · 2016: 6 · 2015: 6 · 2014: 3
FWCI
3.56
Type
journal article
Language
en
Open access
Locations
  • Schizophrenia Research (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
Funders
  • National Institutes of Health
  • National Institute of Mental Health (R01MH091348, R01MH086522, R01MH059852)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Proteoglycans and glycosaminoglycans research
  • Life Sciences › Neuroscience › Sensory Systems › Olfactory and Sensory Function Studies
Keywords
schizophrenia, chondroitin sulfate proteoglycans
MeSH terms
Adult, Aged, Aged, 80 and over, Biopsy, Female, Humans, Male, Middle Aged, Olfactory Mucosa, Proteoglycans, Receptors, Cell Surface, Schizophrenia, Case-Control Studies, GAP-43 Protein, Receptors, N-Acetylglucosamine, Plant Lectins, Olfactory Marker Protein, Versicans, Receptor-Like Protein Tyrosine Phosphatases, Class 5

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