Cited by 738Cell death mechanisms and regulationAutophagy in Disease and TherapyImmunotoxicology and immune responses

The morphology of various types of cell death in prenatal tissues

Schweichel, J.‐U., Merker, H.‐J.·1973·Teratology

Abstract

The morphology of physiological cell death and of necroses caused by treatment with various embryotoxic substances (cyclophosphamide, actinomycin D, vitamin A, vincristine, 6‐aminonicotinamide, 6‐mercaptopurine) and Mg deficiency were studied electron microscopically in rat and mouse embryos and fetuses. Three types of necroses were distinguished in control tissues. (1) Condensation and fragmentation of single cells undergoing phagocytosis, with lysosomal disintegration of the fragments in neighboring cells. (2) Primary formation of lysosomes in dying cells, with activation and subsequent destruction and phagocytosis of the fragments by neighboring cells. This type of cell death in most instances was found during destruction of organs and large cell units. (3) Disintegration of cells into fragments, which were optically no longer detectable, without involvement of the lysosomal system, e.g., in embryonic and epiphyseal cartilage before ossification. In cases of embryolethal toxic agents, e.g., Mg deficiency, cell necroses of large areas prevailed, which were characterized by typical pyknoses (rough, dense chromatin) and lack of lysosomes. In the case of teratogenic effects, however, substances that disturb replication, transcription, and translation (cyclophosphamide, actinomycin D, 6‐mercaptopurine) caused an increase in the number of necroses of type 1. It can, therefore, be assumed that under these conditions similar processes take place in physiological and experimentally induced necroses. After administration of vitamin A, labilization of lysosomes and necroses of type 2 were observed.

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Crossref · 10.1002/tera.1420070306

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  • Cell death has historically been classified into three morphological forms: type I apoptosis, type II autophagy, and type III necrosis.

    “Together with the mechanisms whereby dead cells and their fragments are disposed of, such morphotypes have historically been employed to classify cell death into three different forms: (1) type I cell death or apoptosis, exhibiting cytoplasmic shrinkage, chromatin condensation (pyknosis), nuclear fragmentation (karyorrhexis), and plasma membrane blebbing, culminating with the formation of apparent”

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Authors
Schweichel, J. ‐., & Merker, H. ‐.
Affiliations
Freie Universität Berlin (DE)
Venue
Teratology
Publisher
Wiley
Published
1973-06
Volume
7
Issue
3
Pages
253-266
ISSN
  • 0040-3709 (ISSN-L)
  • 1096-9926
OpenAlex
W2046205790
Cited by
738
References
30
Citations by year
2026: 6 · 2025: 8 · 2024: 15 · 2023: 25 · 2022: 17 · 2021: 19 · 2020: 25 · 2019: 20 · 2018: 25 · 2017: 20 · 2016: 27 · 2015: 22 · 2014: 33 · 2013: 29 · 2012: 26
FWCI
1.95
Type
journal article
Language
en
Open access
closed
Locations
  • Teratology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotoxicology and immune responses
Keywords
cell death, necrosis, physiological cell death, embryotoxicity, teratogenicity, lysosomes, phagocytosis, cyclophosphamide, actinomycin D, vitamin A, vincristine, 6-aminonicotinamide, 6-mercaptopurine, hypomagnesemia, pyknosis, cartilage, rat embryo, mouse embryo
MeSH terms
Abnormalities, Drug-Induced, Animals, Cell Survival, Cyclophosphamide, Dactinomycin, Embryo, Mammalian, Female, Embryonic and Fetal Development, Fetus, Magnesium Deficiency, Mice, Inbred Strains, Microscopy, Electron, Necrosis, Niacinamide, Pregnancy, Rats, Inbred Strains, Vincristine, Vitamin A, Mercaptopurine, Mice, Rats

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