The cytomorphic system of anucleate non-mammalian erythrocytes

@article{Cohen2005TheCS,
  title={The cytomorphic system of anucleate non-mammalian erythrocytes},
  author={William D. Cohen},
  journal={Protoplasma},
  year={2005},
  volume={113},
  pages={23-32}
}
  • W. Cohen
  • Published 1 February 1982
  • Biology
  • Protoplasma
SummaryCytomorphic structure was studied in erythrocytes ofBatrachoseps salamanders, a genus unique among non-mammalian vertebrates because most of the erythrocytes are anucleate. These anucleate erythrocytes are highly flattened, quite variable in size, and generally elliptical. All of them were found to contain marginal bands of microtubules (MBs), as observed in phase contrast and darkfield after Triton lysis. The MBs of larger cells typically twisted into figure-8 forms upon lysis. Whole… 

Figures and Tables from this paper

Immature erythroid cells with novel morphology and cytoskeletal organization in adultXenopus
TLDR
The results show that pointed cells, containing incomplete, pointed MBs are a consistent feature of amphibian erythrogenesis, and may represent intermediate stages in the formation of elliptical erythrocytes.
Nematocytes: Discovery and characterization of a novel anculeate hemocyte in Drosophila falleni and Drosophila phalerata
TLDR
Surprisingly, despite the absence of a nucleus, these cells remain motile with a highly dynamic cellular shape and demonstrate the ability to form multicellular structures, which is suggested to be a component of the innate immune response to macro-parasites.
Observation of non-nucleated erythrocytes in the peripheral blood of medaka, Oryzias latipes.
TLDR
Using May-Grünwald-Giemsa stain, non-nucleated erythrocytes in the peripheral blood of medaka are found and it is expected that this observation will be useful in future studies involving screening for hematologic mutants.
Phylogenetic and Ontogenetic View of Erythroblastic Islands
TLDR
The phylogenetic development of erythroblastic islands in mammals in which the ery Throcytes are anucleate underlines the importance of the macrophage in erythropoiesis and the role that macrophages and microenvironment play in rythroblast enucleation.
Genetic and Cytogenetic Characteristics of Pentaploidy in Water Frogs
TLDR
A pentaploid froglet is described that has never been reported before within the Water Frog (Pelophylax esculentus) hybrid complexes; the possibility of loss of some cytoplasm by large erythrocytes as a result of mechanical damages during circulation through the narrow vessels is discussed.
Budding and direct division of adult human erythrocytes in serum-free cultures.
TLDR
Red blood cells showed cytoplasmic budding, segmentation, and direct division with delayed addition of erythropoietin in serum-free Dulbecco's modified Eagle's medium/nutrient mixture F-12 Ham, thought to be useful for developing model of definitive ERYthropoiesis and simple expansion of human erythrocytes.
Variation across amphibian species in the size of the nuclear genome supports a pluralistic, hierarchical approach to the C‐value enigma
TLDR
A critical re-examination of some of claims that patterns of variation in salamanders support a particular theory of genome size evolution to the exclusion of others, as well as an investigation of the relationships between genome size, cell and nuclear size, and metabolism in amphibians.
Emerging amphibian diseases in Queensland and host immune response to disease
TLDR
It is suggested that B. dendrobatidis kills amphibians by disrupting normal epidermal functioning, leading to osmotic imbalance through loss of electrolytes, which is fundamental to understanding the host– pathogen relationship and thus the population declines attributed to B.
...
1
2
...

References

SHOWING 1-10 OF 32 REFERENCES
Non-nucleated erythrocytes in a teleostean fish Maurolicus Mülleri (Gmelin)
  • K. G. Wingstrand
  • Biology
    Zeitschrift für Zellforschung und Mikroskopische Anatomie
  • 2004
TLDR
It is pointed out, that prevalence of non-nucleated erythrocytes in the blood must be very rare in teleostean fishes, since a great number of species have been investigated and were found to have nucleated ERY Throatcytes.
Marginal bands in camel erythrocytes.
TLDR
The results suggest that marginal bands may be involved in morphogenesis of camel erythrocytes but are not required for maintenance of their ellipticity after cells are fully differentiated.
The cytoskeletal system of nucleated erythrocytes. I. Composition and function of major elements
TLDR
Observations on abnormal pointed erythrocytes containing similarly pointed MBs indicate further that the MB can deform the TBM from within so as to alter cell shape, and MBs may function in this manner during normal cellular morphogenesis and during blood flow in vivo.
Irreversible deformation of the spectrin-actin lattice in irreversibly sickled cells.
TLDR
Observations suggest that a defect of the "spectrin-actin lattice" may be the primary abnormality of the ISC membrane and provide direct evidence that spectrin is important in determining erythrocyte shape.
THE ORGANIZATION OF PROTEINS IN THE HUMAN RED BLOOD CELL MEMBRANE
  • T. Steck
  • Biology
    The Journal of cell biology
  • 1974
TLDR
This article will focus on the localization and modes of association of individual major polypeptides within the human red cell membrane.
Actin in erythrocyte ghosts and its association with spectrin. Evidence for a nonfilamentous form of these two molecules in situ
TLDR
It is concluded that erythrocyte actin and spectrin associate to form an anastomosing network beneath the ery Throatcyte membrane that presumably functions in restricting the lateral movement of membrane-penetrating particles.
Proteins of the camel erythrocyte membrane.
  • G. Ralston
  • Biology
    Biochimica et biophysica acta
  • 1975
An invertebrate coagulation system activated by endotoxin: evidence for enzymatic mediation.
TLDR
The data suggest that endotoxin activates an enzyme which then gels the clottable protein contained in amebocyte lysate, suggesting that enzymatic activity depended upon serine hydroxyl and sulfhydryl groups.
...
1
2
3
4
...