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Related Concept Videos

General Transcription Factors01:30

General Transcription Factors

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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Transcription Factors02:16

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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Essential proteins such as insulin or low-density lipoprotein (LDL) and micronutrients such as iron enter a eukaryotic cell through receptor-mediated endocytosis. Subsequently, the early endosomes fuse with the vesicles containing such receptor-ligand complexes and play a vital role in sorting the incoming ligands and receptors. While the ligands are either degraded inside the vesicle or released into the cytosol, their receptors are returned to the plasma membrane for further rounds of...
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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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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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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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Related Experiment Video

Updated: Dec 8, 2025

Electrophoretic Mobility Shift Assay EMSA for the Study of RNA-Protein Interactions: The IRE/IRP Example
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Cell-type-specific insights into iron regulatory processes.

Katarzyna Mleczko-Sanecka1, Laura Silvestri2,3

  • 1International Institute of Molecular and Cell Biology, Warsaw, Poland.

American Journal of Hematology
|September 18, 2020
PubMed
Summary

Maintaining iron balance is crucial for health. This review explores how cellular mechanisms and the hepcidin-ferroportin axis regulate iron levels, impacting cell function and preventing iron-related diseases.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Physiology

Background:

  • Iron is essential but toxic in excess, necessitating tight regulation.
  • Iron deficiency and overload cause diseases.
  • Iron homeostasis is controlled by intracellular (IRE-IRP) and systemic (hepcidin-FPN) mechanisms.

Purpose of the Study:

  • To review recent advances in cell-type-specific iron regulation.
  • To elucidate mechanisms controlling systemic and local iron balance.
  • To understand how cellular iron shifts affect specialized cell functions.

Main Methods:

  • Literature review of recent research on iron homeostasis.
  • Analysis of regulatory mechanisms of the IRE-IRP system.
  • Examination of the hepcidin-ferroportin axis in systemic iron control.

Main Results:

  • Detailed insights into cell-type-specific regulation of iron.
  • Understanding of how systemic and local iron balance are modified.
  • Exploration of the impact of cellular iron level shifts on cell function.

Conclusions:

  • Cellular iron regulation is complex and cell-type specific.
  • The hepcidin-ferroportin axis is key for systemic iron control.
  • Altered cellular iron impacts specialized cell functions, highlighting the importance of iron homeostasis.