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Regulation of Hematopoietic Stem Cells01:01

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All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
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Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
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Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
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Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
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Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
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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.
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Assessment of the Metabolic Profile of Primary Leukemia Cells
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Metabolic regulation in normal and leukemic stem cells.

Cheuk-Him Man1, Changzheng Li2, Xi Xu3

  • 1Advanced Medical Technology Center, The First Affiliated Hospital, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, 510080, China; Key Laboratory of Stem Cells and Tissue Engineering (Ministry of Education), Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, Guangdong, 510080, China.

Trends in Pharmacological Sciences
|September 21, 2024
PubMed
Summary

Metabolic pathways regulate stress in hematopoietic stem cells (HSCs) and leukemic stem cells (LSCs). Targeting these metabolic adaptations offers new therapeutic strategies for leukemia by overcoming chemoresistance and immune evasion.

Keywords:
bone marrow microenvironmentdrug resistanceepigenetichematopoietic stem cellleukemic stem cellmetabolismoxidative stressproteostatic stress

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Area of Science:

  • Hematology
  • Cell Biology
  • Metabolism

Background:

  • Hematopoietic stem cells (HSCs) maintain blood cell production and tissue homeostasis.
  • Leukemic stem cells (LSCs) drive leukemia progression and are often resistant to therapy.
  • Metabolic adaptations are increasingly recognized as critical regulators of stem cell function.

Purpose of the Study:

  • To review how metabolic pathways influence oxidative and proteostatic stress in HSCs during homeostasis and aging.
  • To explore targetable metabolic pathways in LSCs, focusing on their interplay with epigenetics and the microenvironment.
  • To discuss the therapeutic implications of metabolic differences between HSCs and LSCs.

Main Methods:

  • Literature review of recent research on stem cell metabolism.
  • Analysis of metabolic pathways regulating stress responses in HSCs.
  • Examination of LSC metabolic adaptations related to chemoresistance and immune evasion.

Main Results:

  • Metabolic pathways significantly impact HSC function, survival, and stress responses during aging.
  • Targetable metabolic pathways in LSCs interact with epigenetic and microenvironmental factors.
  • Metabolic reprogramming contributes to LSC chemoresistance and immune evasion.

Conclusions:

  • Metabolic adaptations are key determinants of HSC and LSC function.
  • Targeting metabolic pathways presents a promising therapeutic avenue for leukemia.
  • Understanding HSC-LSC metabolic differences is crucial for developing effective cancer treatments.