1
|
Maros ME, Balla P, Micsik T, Sapi Z, Szendroi M, Wenz H, Groden C, Forsyth RG, Picci P, Krenacs T. Cell Cycle Regulatory Protein Expression in Multinucleated Giant Cells of Giant Cell Tumor of Bone: do They Proliferate? Pathol Oncol Res 2021; 27:643146. [PMID: 34257609 PMCID: PMC8262213 DOI: 10.3389/pore.2021.643146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 04/01/2021] [Indexed: 12/24/2022]
Abstract
Cells of the monocyte macrophage lineage form multinucleated giant cells (GCs) by fusion, which may express some cell cycle markers. By using a comprehensive marker set, here we looked for potential replication activities in GCs, and investigated whether these have diagnostic or clinical relevance in giant cell tumor of bone (GCTB). GC rich regions of 10 primary and 10 first recurrence GCTB cases were tested using immunohistochemistry in tissue microarrays. The nuclear positivity rate of the general proliferation marker, replication licensing, G1/S-phase, S/G2/M-phase, mitosis promoter, and cyclin dependent kinase (CDK) inhibitor reactions was analyzed in GCs. Concerning Ki67, moderate SP6 reaction was seen in many GC nuclei, while B56 and Mib1 positivity was rare, but the latter could be linked to more aggressive (p = 0.012) phenotype. Regular MCM6 reaction, as opposed to uncommon MCM2, suggested an initial DNA unwinding. Early replication course in GCs was also supported by widely detecting CDK4 and cyclin E, for the first time, and confirming cyclin D1 upregulation. However, post-G1-phase markers CDK2, cyclin A, geminin, topoisomerase-2a, aurora kinase A, and phospho-histone H3 were rare or missing. These were likely silenced by upregulated CDK inhibitors p15INK4b, p16INK4a, p27KIP1, p53 through its effector p21WAF1 and possibly cyclin G1, consistent with the prevention of DNA replication. In conclusion, the upregulation of known and several novel cell cycle progression markers detected here clearly verify early replication activities in GCs, which are controlled by cell cycle arresting CDK inhibitors at G1 phase, and support the functional maturation of GCs in GCTB.
Collapse
Affiliation(s)
- Mate E Maros
- 1 Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary.,Department of Biomedical Informatics at the Center for Preventive Medicine and Digital Health, Mannheim, Germany.,Department of Neuroradiology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Peter Balla
- 1 Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Tamas Micsik
- 1 Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Zoltan Sapi
- 1 Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Miklos Szendroi
- Department of Orthopedics, Semmelweis University, Budapest, Hungary
| | - Holger Wenz
- Department of Neuroradiology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Christoph Groden
- Department of Neuroradiology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Ramses G Forsyth
- Department of Anatomic Pathology and Experimental Pathology, University Ziekenhuis, Brussels, Belgium
| | - Piero Picci
- Laboratory of Experimental Oncology, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Tibor Krenacs
- 1 Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| |
Collapse
|