Related Experiment Video
Updated: Jul 12, 2026

08:15
In Situ Exploration of Murine Megakaryopoiesis using Transmission Electron Microscopy
Published on: September 8, 2021
Menin in normal and malignant megakaryopoiesis
1Leukemia Service, Division of Hematologic Malignancies, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
Cancer Cell
|July 9, 2026
Summary
Menin inhibitor therapy can cause low platelet counts. This study reveals menin is crucial for platelet production, identifying it as a therapeutic target for myeloproliferative neoplasms.
Area of Science:
- Hematology
- Oncology
- Molecular Biology
Background:
- Menin inhibitor therapy is associated with severe thrombocytopenia.
- The underlying mechanism of this complication remains unclear.
Purpose of the Study:
- To elucidate the role of menin in megakaryopoiesis.
- To investigate menin as a potential therapeutic vulnerability in myeloproliferative neoplasms.
Main Methods:
- The study likely involved in vitro and in vivo models to assess menin's function in megakaryopoiesis.
- Analysis of gene expression and protein interactions related to menin and platelet production.
Main Results:
- Menin was identified as a key component in normal megakaryopoiesis (the process of platelet production).
- Menin's role in megakaryopoiesis was linked to the development of thrombocytopenia during menin inhibitor therapy.
Conclusions:
- Menin is essential for normal platelet production.
- Targeting menin presents a therapeutic vulnerability for treating myeloproliferative neoplasms, despite the risk of thrombocytopenia.
Related Concept Videos
Abnormal Proliferation
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Abnormal Proliferation
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
Structure and Function of Platelets
The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...
Production of Formed Elements
Hemangioblasts are multipotent stem cells originating from the mesoderm. They give rise to hematopoietic stem cells (HSCs), which undergo hematopoiesis to produce all the formed elements of blood. This process is regulated by a complex network of hematopoietic growth factors, including transcription factors, growth factors, and cytokines. These factors stimulate the HSCs to divide and differentiate, though some HSCs remain undifferentiated to maintain a self-renewing pool.
Most HSCs commit to...
Most HSCs commit to...
mTOR Signaling and Cancer Progression
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
Role of Hematopoietic Growth Factors
Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...
Thrombopoietin (TPO), mainly released by the liver,...

