Iron Homeostasis
Iron Homeostasis - Related Videos
01:16
What is Homeostasis?
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2023
Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set point, from body temperature to blood pressure to levels of certain nutrients. A set point is the physiological value around which the normal range fluctuates. A normal range is a restricted set of values that is optimally healthful and stable. For example, the set point for normal human body temperature is approximately 37°C (98.6°F). Physiological...
01:31
pH Homeostasis
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2023
Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation. Respiratory Regulation of...
08:45
Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes
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Cited by 3 •
2022
This article demonstrates how to prepare and administer transferrin-bound nonradioactive isotopic iron for studies of iron transport in mouse pregnancy. The approach for quantifying isotopic iron in fetoplacental compartments is also described.
08:41
Monitoring Endoplasmic Reticulum Calcium Homeostasis Using a Gaussia Luciferase SERCaMP
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Cited by 8 •
2015
Endoplasmic reticulum calcium homeostasis is disrupted in diverse pathologies. A secreted ER calcium monitoring protein (SERCaMP) reporter can be used to detect disruptions in the ER calcium store. This protocol describes the use of a Gaussia luciferase SERCaMP to examine ER calcium homeostasis in vitro and in vivo.
01:21
Skeleton and Calcium Homeostasis
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2023
Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
FAQs
Hepcidin connects hormonal signaling with iron movement into the circulation by acting through ferroportin, the cellular pathway responsible for iron release. This control is especially important at sites that supply circulating iron, including intestinal tissues and macrophages. By coordinating release with the body's needs, the hepcidin–ferroportin system helps prevent inadequate availability and excessive accumulation.
Transferrin and ferritin manage iron in complementary ways. Transferrin transports iron through the circulation to tissues, whereas ferritin stores excess iron in a safer form. Their distinct roles separate delivery from storage, allowing cells to obtain iron for hemoglobin production, energy metabolism, and enzyme activity without leaving surplus iron uncontained.
These pathways supply iron from different sources. Intestinal absorption brings iron into the body, while macrophage recycling returns iron to the circulation from existing cellular material. Their coordination supports a continuing supply for tissues and reduces dependence on only one source. Hepcidin regulation of ferroportin helps integrate both routes with systemic iron requirements.
Disruption can produce either insufficient iron or excessive accumulation, depending on how regulation fails. Iron deficiency can contribute to anemia, while abnormal accumulation can cause iron overload. These outcomes reflect the importance of coordinating absorption, transport, storage, and recycling rather than regulating any single step in isolation. The resulting imbalance is relevant to physiology and disease research.
Iron homeostasis supports several biological functions at once. Although it contributes to hemoglobin production, iron is also needed for cellular energy metabolism and essential enzyme activity. Consequently, altered iron availability can affect fundamental cellular processes as well as blood-related physiology. This broad functional role makes iron regulation relevant across biology, nutritional science, and disease studies.
Researchers study this regulatory network to understand iron-deficiency anemia, chronic disease, and iron overload. Its linked control points, including absorption, transport, recycling, storage, hepcidin, and ferroportin, provide a framework for investigating disease mechanisms. Findings can support nutritional research and contribute to the development of diagnostic and therapeutic strategies aimed at restoring appropriate iron balance.