Education Content Expert
Erythropoietin is a hormone secreted by the kidneys that stimulate the production of red blood cells.
- It is also known as erythropoetin, haemopoietin, or haematopoietin.
- Erythropoietin (EPO) stimulates the bone marrow which leads to the creation of red blood cells in the body.
- It is produced by perisinusoidal cells in the liver and interstitial fibroblasts in the kidney.
- Decreased levels of erythropoietin may be the reason for the blood-related problems in the body.
- Sometimes damage or disease in the kidney may cause a deficiency of erythropoietin.
It is necessary to check erythropoietin levels in people with blood disorders such as anemia. In severe anemia, the erythropoietin level goes high and causes harmful effects on the body.
Key Terms: Erythropoietin, Erythropoiesis, Red Blood Cells, Kidneys, Hormone, Anemia, Bone Marrow, Blood
What is Erythropoietin?
[Click Here for Sample Questions]
Erythropoietin is a hormone primarily produced by the kidneys to maintain a healthy amount of red blood cells (erythrocytes). It is also referred to as erythropoetin, hematopoietin, and hemopoietin.
- The production of red blood cells in the body depends on this hormone.
- The process of the production of red blood cells is referred to as ‘Erythropoiesis’.
- When the oxygen levels in the cells are low, the kidneys and liver release erythropoietin.
- As a result of the hormone's stimulation, the bone marrow produces more red blood cells.
- However, increased erythropoietin levels in the blood could indicate that the body is not obtaining enough oxygen.
- It could be related to anemia or another illness causing a low red blood cell count.
Erythropoietin
Functions of Erythropoietin
[Click Here for Sample Questions]
Erythropoietin stimulates the bone marrow to produce red blood cells, aiding in the maintenance of blood in the human body. It is a crucial process since the health of all body cells depends on a steady flow of oxygen-rich blood.
- The organs and tissues may suffer from hypoxia, or a shortage of oxygen, without new red blood cells.
- Hypoxia can change how the cells function, which may ultimately cause disease or cell death in the area.
- Once the body produces red blood cells, erythropoietin aids in their protection.
- Under regular circumstances, such as moving to a higher altitude, erythropoietin levels may vary slightly.
- However, various diseases can also prevent the body's normal erythropoietin synthesis.
- For instance, anemia can make it difficult to maintain healthy red blood cells in the body.
Along with Erythropoiesis, Erythropoietin has various other functions which include:
- Stimulation of Angiogenesis
- Vasoconstriction-dependent Hypertension
- Cell Survival via Activation of Erythropoietin Receptors
Up until the early 2000s, erythropoietin was also employed as a performance-enhancing substance in the world of sports, especially in cycling.
Read More:
What Causes High Levels of Erythropoietin?
[Click Here for Sample Questions]
Erythropoietin (EPO) levels may rise as a result of prolonged (chronic) exposure to low oxygen levels.
- It might be brought on when an individual is smoking for a long time.
- It can also be high if an individual is residing in an area with low air oxygen levels at a high altitude.
- In a high-altitude setting, elevated EPO is typical and suitably high.
- Even if the renal disease is not present, anemia can still raise EPO levels.
- When an individual doesn't have enough red blood cells or their red blood cells are not functioning properly, they have anemia.
- In that case, kidneys create more EPO when the body doesn't have enough red blood cells, which can result in high levels of EPO.
What Causes Low Levels of Erythropoietin?
[Click Here for Sample Questions]
Low EPO levels are most frequently caused by chronic kidney disease (CKD).
- EPO levels fall as a result of decreased production due to damaged kidneys.
- Anaemia can be brought on by CKD and low EPO levels.
- Low EPO levels can also result from polycythemia vera.
- A genetic condition called polycythemia vera causes the bone marrow to produce an excessive amount of red blood cells.
- In that case, kidneys perceive that the body has enough red blood cells and stops producing as much EPO as a result, resulting in low EPO levels.
Erythropoietin Test
[Click Here for Sample Questions]
Erythropoietin Test is used to identify the root cause of anemia.
- An erythropoietin examination is typically conducted after a full blood count (CBC) with unusual findings, such as a low red blood cell (RBC) count, low hemoglobin, or low hematocrit.
- It aids in the diagnosis of anemia and offers hints as to the condition's potential origin.
- To determine whether a shortage of erythropoietin is causing or worsening anemia, erythropoietin monitoring is utilized.
Recombinant Erythropoietin
[Click Here for Sample Questions]
Recombinant Human Erythropoietin in vitro (outside the body) was manufactured by Recombinant DNA Technology.
- Recombinant Human Erythropoietin could help people with chronic renal failure suffering from anemia due to a lack of erythropoietin.
- Erythropoietin is the first hematopoietic growth factor to be produced for medicinal purposes.
- It is also used to treat anemia caused by zidovudine (AZT) therapy in HIV patients.
- It also helps in the reversal of anemia in cancer patients undergoing chemotherapy.
- Recombinant human erythropoietin is also used to stimulate the development of neurons.
Check More:
Things to Remember
- Erythropoietin is a hormone that helps to maintain a healthy amount of red blood cells.
- It is primarily produced by the kidneys along with the liver.
- It promotes the production of red blood cells in the bone marrow in response to low oxygen levels in the blood.
- Erythropoietin Test is used to clinically diagnose erythropoietin levels in the body.
- Low EPO levels can cause anemia, while high EPO levels can cause polycythemia.
- Abnormal EPO levels may indicate a kidney or bone marrow disease.
Sample Questions
Ques. What is Erythropoietin? (3 Marks)
Ans. Erythropoietin is an important hormone produced by kidneys and is responsible for the creation of red blood cells.
- It stimulates the bone marrow which leads to the creation of red blood cells in the body.
- Red blood cells play a vital role in carrying oxygen to different parts of the body, which ensures the proper working of the body.
- A decrease in the level of erythropoietin level in the body may be the reason for problems related to blood in the body.
Ques. What is Erythropoiesis? (3 Marks)
Ans. Erythropoiesis is the process through which the human body produces red blood cells (erythrocytes). Erythropoiesis maintains a proper number of red blood cells in the body-neither too few nor too many. It takes place in spongy tissue inside of your bones known as bone marrow.
Red blood cells are crucial for the proper working of the body because they:
- Deliver oxygen from the air into the lungs to all the tissues in the body.
- Transport the carbon dioxide from the body's tissues to the lungs to exhale it.
Ques. State the role of the EPO Test. (2 Marks)
Ans. Erythropoietin Test, also known as EPO test, can aid in the diagnosis of conditions that may impact red blood cells, including anemia and hypoxemia brought on by long-term lung disease. Erythropoietin can also be produced synthetically and used to treat some types of anemia.
Ques. What is the purpose of Erythropoietin? (3 Marks)
Ans. Erythropoietin (EPO) plays an important role in the production of red blood cells. The body's tissues receive oxygen from red blood cells. Body tissues emit carbon dioxide as oxygen is converted into energy. In order to exhale carbon dioxide, the red blood cells also carry it to the lungs.
Normally, specialized kidney cells that detect low blood oxygen levels enhance EPO production. EPO instructs your bone marrow, a spongy structure inside your bones, to produce more red blood cells. The amount of erythropoietin produced is decreased by kidney cells when they determine that the blood contains enough oxygen.
Ques. Why is the use of EPO prohibited in Sports? (2 Marks)
Ans. Erythropoietin was used by sportsmen to increase the RBC count in their blood and thus increase their capacity for oxygen and endurance. It can increase performance capacity. It has been banned by most sports bodies, including the International Association of Athletics Federations. Erythropoietin is now screened as a part of the Olympic anti-doping program.
Ques. What happens if there is too much Erythropoietin in the body? (3 Marks)
Ans. Excess erythropoietin is caused by either uncommon tumors that produce high levels of erythropoietin or long-term exposure to low oxygen levels. It results in polycythemia, which is a disorder marked by a high red blood cell count. Many patients with polycythemia experience no symptoms at all. There are, however, certain symptoms that are broad and non-specific, such as weakness, exhaustion, headache, itching, joint discomfort, and disorientation.
Ques. What happens if there is too little Erythropoietin in the body? (3 Marks)
Ans. One will experience anemia if the body produces too little erythropoietin, which is typically brought on by chronic kidney illness. Synthetic erythropoietin has been created to treat anemia brought on by chronic renal failure. The amount of oxygen that can be given to tissues, especially muscles, is improved when erythropoietin levels are artificially raised since this results in the production of more hemoglobin and red blood cells.
Ques. What are the stages of Erythropoiesis? (5 Marks)
Ans. During erythropoiesis, an originating cell known as a hematopoietic stem cell (HSC) grows into a fully mature red blood cell or erythrocyte. For this to occur, a cell must pass through a number of steps.
- All blood cells, including platelets, white blood cells, and red blood cells, start out as HSCs.
- An HSC develops into a common myeloid progenitor (CMP) cell, which ultimately gives rise to red blood cells.
- A CMP can develop into a white blood cell, a platelet, or a red blood cell.
- Megakaryocyte-erythroid progenitor cells (MK-EPCs) grow from a CMP that will eventually become a red blood cell (MEP).
- The cell will eventually evolve into a red blood cell after it transforms into an MEP.
It advances through the subsequent phases as it grows:
- Proerythroblast.
- Erythroblast.
- Normoblast.
- Reticulocyte.
- Erythrocyte (fully mature red blood cell).
Ques. The hormone erythropoietin
A. Delays the time for the maturation of RBC.
B. Contributes to the acceleration of production of RBC and Hb.
C. Reduces the affinity of Hb towards Oxygen.
D. Protein heme production reduces. (3 Marks)
Ans. B. Contributes to the acceleration of production of RBC and Hb
Explanation: All the living processes happening inside the body rely heavily on blood. The red blood cells in the blood deliver oxygen, the most vital component of all cells. Erythropoietin is a glycoprotein hormone that is essential for erythropoiesis, the process by which red blood cells are created within the bone marrow. Erythropoiesis cannot occur without erythropoietin. As a result, it is a crucial element that quickens the creation of RBC and Hb, or hemoglobin.
Ques. How to detect Erythropoietin in the blood? (2 Marks)
Ans. Erythropoietin levels can be diagnosed through Erythropoietin Test (EPO Test). The EPO test results may vary according to several factors such as
- Age
- Biological Sex
- Overall Health
Check-Out:
Comments