|
1
|
Vitkunaite A, Laurinaviciene A, Plancoulaine B, Rasmusson A, Levenson R, Shribak M, Laurinavicius A. Intranuclear birefringent inclusions in paraffin sections by polychromatic polarization microscopy. Sci Rep 2021; 11:6275. [PMID: 33737593 PMCID: PMC7973427 DOI: 10.1038/s41598-021-85667-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 03/03/2021] [Indexed: 11/25/2022] Open
Abstract
Intranuclear birefringent inclusions (IBI) found in various cell types in paraffin-embedded tissue sections have long been considered to be a tissue processing artifact, although an association with biological processes has been suggested. We applied polychromatic polarization microscopy to image their spatial organization. Our study provides evidence that IBI are caused by liquid paraffin-macromolecular crystals formed during paraffin-embedding procedures within cells and potentially reflect an active transcriptional status.
Collapse
Affiliation(s)
- Aiste Vitkunaite
- National Center of Pathology, Affiliate of Vilnius University Hospital Santaros Clinics, Vilnius, Lithuania
| | - Aida Laurinaviciene
- National Center of Pathology, Affiliate of Vilnius University Hospital Santaros Clinics, Vilnius, Lithuania.,Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Benoit Plancoulaine
- Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, Vilnius, Lithuania.,ANTICIPE, Inserm (UMR 1086), Cancer Center F. Baclesse, Normandy University, Caen, France
| | - Allan Rasmusson
- National Center of Pathology, Affiliate of Vilnius University Hospital Santaros Clinics, Vilnius, Lithuania.,Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Richard Levenson
- Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, Vilnius, Lithuania.,Department of Pathology and Laboratory Medicine, UC Davis Health, Sacramento, CA, USA
| | - Michael Shribak
- Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, Vilnius, Lithuania.,Marine Biological Laboratory of University of Chicago, Woods Hole, MA, USA
| | - Arvydas Laurinavicius
- National Center of Pathology, Affiliate of Vilnius University Hospital Santaros Clinics, Vilnius, Lithuania. .,Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, Vilnius, Lithuania.
| |
Collapse
|
|
2
|
Abstract
Tonsils of 20 patients with recurrent tonsillitis were investigated. Activated lymphocytes, that is lymphocytes with increased nuclear birefringence, were found in only 3 cases. The lack of lymphocyte activation is supposedly due to reduced antigen stimulation. Since antigens arrive at the tonsillar lymphoid tissue via the follicle-associated cells of the crypt epithelium, the ultrastructure of this epithelium was also studied in 5 cases. Tonsils of three dogs were used for comparison. In the repeatedly inflamed human tonsils the follicle-associated, so-called M cells contained fewer intracytoplasmic tubules and vesicles than those of the dogs. Moreover the frequency of these cells seemed to be reduced. Most of the crypts of inflamed tonsils were lined with a non-reticulated, stratified squamous epithelium. A hypothesis is presented on the pathomechanism of recurrent tonsillitis and suggestions are put forward about its pathohistology.
Collapse
|