Cited by 45Bone Metabolism and DiseasesPhagocytosis and Immune RegulationCell death mechanisms and regulation

Osteoblasts engulf apoptotic bodies during alveolar bone formation in the rat maxilla

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Cerri, Paulo Sérgio·2005·The Anatomical Record Part A: Discoveries in Molecular, Cellular, and Evolutionary Biology

Abstract

During bone formation, as in other tissues and organs, intense cellular proliferation and differentiation are usually observed. It has been described that programmed cell death, i.e., apoptosis, takes place in the control of the cellular population by removing of the excessive and damaged cells. Although it is generally accepted that apoptotic bodies are engulfed by professional phagocytes, the neighboring cells can also take part in the removal of apoptotic bodies. In the present study, regions of initial alveolar bone formation of rat molars were examined with the aim to verify whether osteoblasts are capable of engulfing apoptotic bodies, such as professional phagocytes. Rats aged 11–19 days were sacrificed and the maxillary fragments containing the first molar were removed and immersed in the fixative solution. The specimens fixed in glutaraldehyde‐formaldehyde were processed for light microscopy and transmission electron microscopy. For the detection of apoptosis, the specimens were fixed in formaldehyde, embedded in paraffin, and submitted to the TUNEL method. The results revealed round/ovoid structures containing dense bodies on the bone surface in close contact to osteoblasts and in conspicuous osteoblast vacuoles. These round/ovoid structures showed also positivity to the TUNEL method, indicating that bone cells on the bone surface are undergoing apoptosis. Ultrathin sections showed images of apoptotic bodies being engulfed by osteoblasts. Occasionally, the osteoblasts exhibited large vacuoles containing blocks of condensed chromatin and remnants of organelles. Thus, these images suggest that osteoblasts are able to engulf and degrade apoptotic bodies. © 2005 Wiley‐Liss, Inc.

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  • Besides professional phagocytes, osteoblasts are also able to engulf and degrade apoptotic bodies during alveolar bone formation.

    “These findings suggest that besides professional phagocytes, osteoblasts are also able to engulf and degrade apoptotic bodies during alveolar bone formation [49].”

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Authors
Cerri, P. S.
Affiliations
Universidade Estadual Paulista (Unesp) (BR)
Corresponding author
Cerri, Paulo Sérgio
Venue
The Anatomical Record Part A: Discoveries in Molecular, Cellular, and Evolutionary Biology
Publisher
Wiley
Published
2005-07-26
Volume
286A
Issue
1
Pages
833-840
ISSN
  • 1552-4884 (ISSN-L)
  • 1552-4892
OpenAlex
W2005950537
Cited by
45
References
36
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 3 · 2021: 3 · 2020: 3 · 2019: 2 · 2018: 3 · 2017: 1 · 2016: 1 · 2015: 4 · 2014: 3 · 2013: 1 · 2012: 4
FWCI
1.12
Type
journal article
Language
en
Open access
Locations
  • The Anatomical Record Part A Discoveries in Molecular Cellular and Evolutionary Biology (publishedVersion)
  • PubMed (publishedVersion)
  • Americanae (AECID Library) (publishedVersion, other-oa)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (publishedVersion, other-oa)
  • Acervo Digital da Universidade Estadual Paulista (Universidade Estadual Paulista) (submittedVersion, other-oa)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
  • Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
osteoblasts, apoptotic bodies, alveolar bone formation, apoptosis, phagocytosis, bone remodeling, molar development, TUNEL
MeSH terms
Alveolar Process, Animals, Bone Matrix, Cell Division, Histocytochemistry, Maxilla, Osteoblasts, Osteogenesis, Phagocytes, Cell Death, Rats, Sprague-Dawley, Apoptosis, In Situ Nick-End Labeling, Microscopy, Electron, Transmission, Rats

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