Cited by 54Cell death mechanisms and regulationErythrocyte Function and PathophysiologyLipid Membrane Structure and Behavior

Deciphering the plasma membrane hallmarks of apoptotic cells: Phosphatidylserine transverse redistribution and calcium entry

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Martínez, M Carmen, Freyssinet, Jean-Marie·2001·BMC Cell Biology

Abstract

BACKGROUND: During apoptosis, Ca2+-dependent events participate in the regulation of intracellular and morphological changes including phosphatidylserine exposure in the exoplasmic leaflet of the cell plasma membrane. The occurrence of phosphatidylserine at the surface of specialized cells, such as platelets, is also essential for the assembly of the enzyme complexes of the blood coagulation cascade, as demonstrated by hemorrhages in Scott syndrome, an extremely rare genetic deficiency of phosphatidylserine externalization, without other apparent pathophysiologic consequences. We have recently reported a reduced capacitative Ca2+ entry in Scott cells which may be part of the Scott phenotype. RESULTS: Taking advantage of these mutant lymphoblastoid B cells, we have studied the relationship between this mode of Ca2+ entry and phosphatidylserine redistribution during apoptosis. Ca2+ ionophore induced apoptosis in Scott but not in control cells. However, inhibition of store-operated Ca2+ channels led to caspase-independent DNA fragmentation and decrease of mitochondrial membrane potential in both control and Scott cells. Inhibition of cytochrome P450 also reduced capacitative Ca2+ entry and induced apoptosis at comparable extents in control and Scott cells. During the apoptotic process, both control and more markedly Scott cells externalized phosphatidylserine, but in the latter, this membrane feature was however dissociated from several other intracellular changes. CONCLUSIONS: The present results suggest that different mechanisms account for phosphatidylserine transmembrane migration in cells undergoing stimulation and programmed death. These observations testify to the plasticity of the plasma membrane remodeling process, allowing normal apoptosis even when less fundamental functions are defective.

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Crossref · 10.1186/1471-2121-2-20

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  • Actin-myosin interactions appear critical to formation of all four EV types, and phosphatidylserine translocation to the outer membrane is common to apoptotic bodies and microvesicles.

    “For instance, actin-myosin interactions appear critical to the formation of all four types of EVs [66, 85, 100, 115].”

    From Biogenesis of extracellular vesicles (EV): exosomes, microvesicles, retrovirus-like vesicles, and apoptotic bodies (2013) · cites this paper as [106]

    The citation is attached to the sentence about actin–myosin interactions in the formation of all four EV types. Our copy’s Background and Results discuss calcium entry and phosphatidylserine externalization during apoptosis, but no passage found addresses actin–myosin interactions or formation of four EV types (searched: actin–myosin, actomyosin, myosin, and EV formation). (LLM, conf=0.75)

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  1. Bouchon A Krammer PH Walczak H Critical role for mitochondria in B cell receptor-mediated apoptosis. Eur J Immunol 2000 30 69 77 10602028 10.1002/(SICI)1521-4141(200001)30:01<69::AID-IMMU69>3.0.CO;2-L · DOI

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Authors
Martínez, M. C., & Freyssinet, J.-M.
Affiliations
  • Université de Strasbourg (FR)
  • Inserm (FR)
Corresponding author
Freyssinet, Jean-Marie
Venue
BMC Cell Biology
Published
2001-10-17
Volume
2
Issue
1
Pages
20-20
ISSN
1471-2121 (ISSN-L)
OpenAlex
W2160975723
Cited by
54
References
55
Citations by year
2025: 1 · 2023: 4 · 2022: 3 · 2021: 3 · 2020: 4 · 2019: 2 · 2018: 8 · 2017: 2 · 2016: 1 · 2014: 1 · 2013: 2
FWCI
1.17
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • BMC Cell Biology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, other-oa)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • Institut National de la Santé et de la Recherche Médicale
  • Fondation pour la Recherche Médicale
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Physiology › Erythrocyte Function and Pathophysiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Lipid Membrane Structure and Behavior
Keywords
apoptosis, phosphatidylserine exposure, store-operated calcium entry, Scott syndrome, cytochrome P450, mitochondrial membrane potential, plasma membrane remodeling
MeSH terms
Calcimycin, Biological Transport, Calcium, Calcium Channel Blockers, Cell Line, Cell Membrane, Enzyme Inhibitors, Humans, Imidazoles, Ionophores, Membrane Potentials, Mitochondria, Phosphatidylserines, Proadifen, Calcium Channels, Apoptosis, DNA Fragmentation, Cytochrome P-450 Enzyme Inhibitors

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