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Classification of Leukocytes01:30

Classification of Leukocytes

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Leukocytes are classified into two groups based on the presence or absence of cytoplasmic granules. Granular leukocytes, which contain granules, belong to the myeloid lineage and are divided into three subtypes: neutrophils, eosinophils, and basophils. These cells are roughly spherical and characterized by the granules in their cytoplasm.
Neutrophils are the most abundant type of granular leukocytes, comprising 50-70% of all leukocytes. They feature small, evenly distributed granules and a...
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Erythropoiesis01:14

Erythropoiesis

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Red blood cells  (RBCs) transport oxygen to all body tissues. These cells survive only for 120 days and then need to be replenished. Erythropoiesis is the process of RBC production. In healthy individuals, erythropoiesis ensures all tissues are amply supplied with oxygen. In addition, blood loss due to injury leads to a drop in the physiological oxygen level that will cause erythropoiesis. Any defect in erythropoiesis leads to several physiological disorders, including thalassemia, anemia,...
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Disorders of Erythrocytes01:27

Disorders of Erythrocytes

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Disorders of erythrocytes, or red blood cells (RBCs), include a range of conditions affecting their number, shape, or function.
Erythrocyte disorders can be broadly categorized into two main types: anemic and polycythemic conditions.
A low oxygen-carrying capacity of the blood due to the loss, lower production, or destruction of erythrocytes is termed anemia. Hemorrhagic anemia, for example, occurs when bleeding from an external wound or internal ulcer reduces erythrocyte counts.
On the other...
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Disorders of Leukocytes01:27

Disorders of Leukocytes

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Leukocyte disorders can lead to either leukopenia, characterized by an abnormally low leukocyte count, or leukocytosis, marked by a very high leukocyte number.
Leukopenia may result from bone marrow disorders, autoimmune diseases, and infectious diseases. For example, conditions such as multiple myeloma and aplastic anemia can impair the bone marrow's ability to produce adequate leukocytes. Similarly, autoimmune diseases like lupus and viral infections such as HIV can prompt the immune...
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Lineage Commitment01:21

Lineage Commitment

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Commitment is the  process whereby stem cells:
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Classification of Epithelial Tissues: Overview01:22

Classification of Epithelial Tissues: Overview

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Epithelial tissues are classified according to the shape of the cells and the number of cell layers formed. Cell shapes can be squamous (flattened and thin), cuboidal (square-like, as wide as it is tall), or columnar (rectangular, taller than it is wide). Additionally, the nucleus shape helps identify the type of epithelial cells. Squamous cells have flattened disc-shaped nuclei, cuboidal cells have spherical nuclei, and columnar cells have elongated nuclei.
Based on the number of cell layers,...
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Related Experiment Video

Updated: Jul 29, 2025

Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells
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Lentiviral-mediated Knockdown During Ex Vivo Erythropoiesis of Human Hematopoietic Stem Cells

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Erythroleukemia: Classification.

Nathalie Cervera1, Arnaud Guille1, José Adélaïde1

  • 1Laboratoire d'Oncologie Prédictive Centre de Recherche en Cancérologie de Marseille (CRCM) Institut Paoli-Calmettes INSERM UMR 1068 CNRS UMR725 Aix-Marseille Université Marseille France.

Ejhaem
|May 19, 2023
PubMed
Summary

Acute erythroid leukemia (AEL), a rare subtype of acute myeloid leukemia (AML), can be classified into three distinct groups. These AEL classes exhibit different prognoses and unique molecular mutation patterns.

Keywords:
TP53acute erythroid leukemiamolecular classificationmutations

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Identification and Analysis of Mouse Erythroid Progenitors using the CD71/TER119 Flow-cytometric Assay
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Identification and Analysis of Mouse Erythroid Progenitors using the CD71/TER119 Flow-cytometric Assay
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Identification and Isolation of Burst-Forming Unit and Colony-Forming Unit Erythroid Progenitors from Mouse Tissue by Flow Cytometry
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Identification and Isolation of Burst-Forming Unit and Colony-Forming Unit Erythroid Progenitors from Mouse Tissue by Flow Cytometry

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Area of Science:

  • Hematology
  • Oncology
  • Molecular Biology

Background:

  • Acute erythroid leukemia (AEL) represents a rare subtype of acute myeloid leukemia (AML), accounting for 2%-5% of cases.
  • The molecular landscape of AEL shares similarities with other forms of AML.

Purpose of the Study:

  • To propose a novel classification system for AEL.
  • To identify distinct prognostic categories within AEL.
  • To characterize specific molecular features associated with each AEL class.

Main Methods:

  • Retrospective analysis of AEL patient molecular data.
  • Classification based on distinct molecular alteration profiles.
  • Correlation of molecular classes with clinical prognosis.

Main Results:

  • A classification of AEL into three major molecular groups was established.
  • These groups demonstrate significantly different patient prognoses.
  • A notable tendency for mutual exclusion between mutations in epigenetic regulators and signaling genes was observed within specific classes.

Conclusions:

  • The proposed classification provides a framework for understanding AEL heterogeneity.
  • Identifying distinct AEL classes aids in predicting patient outcomes.
  • Understanding mutation patterns, such as the interplay between epigenetic and signaling genes, is crucial for AEL management.