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Comparative study of calcification in human choroid plexus, pineal gland, and habenula

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Abstract

Choroid plexus, pineal gland, and habenula tend to accumulate physiologic calcifications (concrements) over a lifetime. However, until now the composition and causes of the intracranial calcifications remain unclear. The detailed analysis of concrements has been done by us using X-ray diffraction analysis (XRD), X-ray diffraction topography (XRDT), micro-CT, X-ray phase-contrast tomography (XPCT), as well as histology and immunohistochemistry (IHC). By combining physical (XRD) and biochemical (IHC) methods, we identified inorganic (hydroxyapatite) and organic (vimentin) components of the concrements. Via XPCT, XRDT, histological, and IHC methods, we assessed the structure of concrements within their appropriate tissue environment in both two and three dimensions. The study found that hydroxyapatite was a major component of all calcified depositions. It should be noted, however, that the concrements displayed distinctive characteristics corresponding to each specific structure of the brain. As a result, our study provides a basis for assessing the pathological and physiological changes that occur in brain structure containing calcifications.

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Data availability

The data that support the findings (histological, IHC, XRD, XRDT, XPCT) of this study are available on request from the corresponding author.

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Acknowledgements

X-ray diffraction experiments were performed within the State assignment of FSRC "Crystallography and Photonics" of Russian Academy of Sciences using the equipment of the Shared Research Center FSRC “Crystallography and Photonics” RAS. This work was performed within the State Assignment of FSRC "Crystallography and Photonics" RAS in part of X-ray studies.

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Contributions

O.J. and S.V.S. conceived and designed the research; O.J. and D.A.O. performed the research and acquired the histological and IHC data; A.G.I. performed the research and acquired the XRD data; I.B., M.F., A.C., and F.W. performed the research and acquired the XPCT data; D.A.Z., I.G.D., and Yu.S.K. performed the research and acquired the XRDT data; O.J., S.V.S., I.B., A.G.I., and D.A.Z. analyzed and interpreted the data. All authors were involved in drafting and revising the manuscript.

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Correspondence to O. Junemann or I. Bukreeva.

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Ethical approval

The study was carried out on autopsy material obtained from the collection of Federal State Scientific Institution Research Institute of Human Morphology (Moscow, Russian Federation). All protocols were approved by the Ethical Committee of the Research Institute of Human Morphology of the Russian Academy of Medical Sciences (now FSSI Research Institute of Human Morphology) (No. 6A of October 19, 2009) and are in correspondence with instructions of the Declaration of Helsinki including points 7–10 for human material from 12.01.1996 with the last amendments from 19.12.2016.

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The authors declare no competing interest.

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Junemann, O., Ivanova, A.G., Bukreeva, I. et al. Comparative study of calcification in human choroid plexus, pineal gland, and habenula. Cell Tissue Res 393, 537–545 (2023). https://doi.org/10.1007/s00441-023-03800-7

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  • DOI: https://doi.org/10.1007/s00441-023-03800-7

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