Lost Blood: A Chain Missing
Have you ever heard of hemoglobin? It is a protein in red blood cells responsible for carrying oxygen throughout the body. Imagine hemoglobin as a car with four tires — two front tires called alpha chains and two back tires called beta chains. If one beta tire is lost or damaged, the car cannot move smoothly. In beta thalassemia, the body cannot produce enough beta chains of hemoglobin. As a result, red blood cells become weak, break easily, and cannot carry oxygen efficiently.
This disease is not man-made, nor is it caused by bacteria — it is inherited genetically. If both parents are carriers of one faulty gene (heterozygous), their child has a 25% chance of inheriting two faulty genes (homozygous) and developing beta thalassemia major — the most severe form. Others may only be carriers without symptoms, known as beta thalassemia minor or thalassemia trait.
Silent but Dangerous Symptoms
For those suffering from beta thalassemia major, symptoms appear from infancy. They look pale, tired, and have poor appetite. Over time, the spleen (spleen) enlarges because it has to work hard to clean the damaged red blood cells. The face may appear slightly different — prominent facial bones, a broad forehead, and a flat nose due to the bone marrow trying to produce more red blood cells. Patients are also prone to jaundice and at risk of gallstones.
Worse still, if left untreated, these children can suffer heart failure and early death due to excessive iron buildup in the body. Iron comes from frequent blood transfusions — ironically, the treatment that saves lives also becomes the cause of new problems.
Cause: Faulty Genes on Chromosome 11
The real cause of beta thalassemia lies in mutations of the HBB gene located on chromosome 11. This gene instructs the production of beta-globin, a key component of hemoglobin. Mutations can be small (only reducing production) or large (completely stopping production).
If a person inherits two faulty genes (one from each parent), the production of beta-globin becomes zero or nearly zero. Thus, adult hemoglobin (HbA) cannot be formed properly. Instead, the body produces fetal hemoglobin (HbF), which should only exist during pregnancy. HbF is not long-lasting, breaks easily, and is inefficient in carrying oxygen. As a result, patients experience severe chronic anemia.
Interestingly, the severity of the disease depends on the type of mutation. Some mutations still allow for a little beta-globin production — this is called beta+ thalassemia. Mutations that completely stop production are called beta0 thalassemia. The less beta-globin, the worse the anemia.
Diagnosis: Not as Simple as a Blood Test
To detect beta thalassemia, doctors start with family history — whether anyone in the family has severe anemia or died young without a clear cause. Then, simple blood tests such as a full blood count can show small (microcytic) and pale (hypochromic) red blood cells.
More specific tests like hemoglobin electrophoresis or HPLC measure the type and amount of hemoglobin. In beta thalassemia patients, hemoglobin A2 and hemoglobin F levels will be high. Ferritin tests are also needed to differentiate it from iron-deficiency anemia — because both causes can lead to small red blood cells, but the treatments differ.
A definitive diagnosis can be obtained through molecular genetic testing to detect HBB mutations. This test is also important for genetic counseling in families, especially for couples planning to have children.
Treatment: Blood Transfusions, Iron, and New Hope
For patients with beta thalassemia major, the main treatment is lifelong blood transfusions — every 2-4 weeks to maintain hemoglobin at a safe level. However, repeated transfusions cause iron buildup in the heart, liver, and pancreas. If not removed, it can damage organs and lead to death. Therefore, patients need to take iron chelation therapy medications such as deferoxamine (injection) or deferasirox (oral) to remove excess iron.
The only treatment that can cure beta thalassemia is a stem cell transplant. But it is not easy — it requires a compatible donor, high risk of complications, and high cost. For those who cannot undergo transplants, gene therapy is showing promise. In 2019, a gene therapy called Zynteglo was approved in Europe for beta thalassemia patients requiring transfusions. It involves genetically modifying the patient's own stem cells to produce functional beta-globin.
Life with Beta Thalassemia
For patients with beta thalassemia minor or thalassemia trait, they usually do not require treatment. However, it is important for them to know their status — especially in family planning. If two carriers marry, there is a 25% chance their child will inherit the major form. Therefore, pre-marriage screening is strongly recommended in countries with high thalassemia rates such as Malaysia, Thailand, and Indonesia.
For major patients, life can still be meaningful with consistent treatment. Many adult patients undergoing transfusions and iron chelation therapy are able to study, work, and have families. However, they need to be disciplined with their treatment, regularly monitor their organ health, and avoid foods rich in iron such as liver and red meat.
Beta thalassemia is not a death sentence. With medical advances, patients can now live longer and healthier lives. Society also needs to be more aware — don't underestimate the symptoms of anemia that seem ordinary. Sometimes, behind the pale and tired appearance that seems trivial, there is an inherited disease waiting to be diagnosed.
Rujukan: Beta thalassemia — Wikipedia
This Secret Disease Makes the Body Unable to Produce Red Blood Cells — Found in 1 in 30 Asians. Imagine your own body being unable to produce an essential component in blood that carries oxygen. That is the reality for beta thalassemia patients. This inherited disease is more common than thought, especially in Asia. From those with no symptoms to those requiring lifelong blood transfusions, this is the little-known story of beta thalassemia.. Lost Blood: A Chain Missing
Have you ever heard of hemoglobin? It is a protein in red blood cells responsible for carrying oxygen throughout the body. Imagine hemoglobin as a car with four tires — two front tires called alpha chains and two back tires called beta chains. If one beta tire is lost or damaged, the car cannot move smoothly. In beta thalassemia, the body cannot produce enough beta chains of hemoglobin. As a result, red blood cells become weak, break easily, and cannot carry oxygen efficiently.
This disease is not man-made, nor is it caused by bacteria — it is inherited genetically. If both parents are carriers of one faulty gene heterozygous , their child has a 25% chance of inheriting two faulty genes homozygous and developing beta thalassemia major — the most severe form. Others may only be carriers without symptoms, known as beta thalassemia minor or thalassemia trait.
Silent but Dangerous Symptoms
For those suffering from beta thalassemia major, symptoms appear from infancy. They look pale, tired, and have poor appetite. Over time, the spleen spleen enlarges because it has to work hard to clean the damaged red blood cells. The face may appear slightly different — prominent facial bones, a broad forehead, and a flat nose due to the bone marrow trying to produce more red blood cells. Patients are also prone to jaundice and at risk of gallstones.
Worse still, if left untreated, these children can suffer heart failure and early death due to excessive iron buildup in the body. Iron comes from frequent blood transfusions — ironically, the treatment that saves lives also becomes the cause of new problems.
Cause: Faulty Genes on Chromosome 11
The real cause of beta thalassemia lies in mutations of the HBB gene located on chromosome 11. This gene instructs the production of beta-globin, a key component of hemoglobin. Mutations can be small only reducing production or large completely stopping production .
If a person inherits two faulty genes one from each parent , the production of beta-globin becomes zero or nearly zero. Thus, adult hemoglobin HbA cannot be formed properly. Instead, the body produces fetal hemoglobin HbF , which should only exist during pregnancy. HbF is not long-lasting, breaks easily, and is inefficient in carrying oxygen. As a result, patients experience severe chronic anemia.
Interestingly, the severity of the disease depends on the type of mutation. Some mutations still allow for a little beta-globin production — this is called beta+ thalassemia. Mutations that completely stop production are called beta0 thalassemia. The less beta-globin, the worse the anemia.
Diagnosis: Not as Simple as a Blood Test
To detect beta thalassemia, doctors start with family history — whether anyone in the family has severe anemia or died young without a clear cause. Then, simple blood tests such as a full blood count can show small microcytic and pale hypochromic red blood cells.
More specific tests like hemoglobin electrophoresis or HPLC measure the type and amount of hemoglobin. In beta thalassemia patients, hemoglobin A2 and hemoglobin F levels will be high. Ferritin tests are also needed to differentiate it from iron-deficiency anemia — because both causes can lead to small red blood cells, but the treatments differ.
A definitive diagnosis can be obtained through molecular genetic testing to detect HBB mutations. This test is also important for genetic counseling in families, especially for couples planning to have children.
Treatment: Blood Transfusions, Iron, and New Hope
For patients with beta thalassemia major, the main treatment is lifelong blood transfusions — every 2-4 weeks to maintain hemoglobin at a safe level. However, repeated transfusions cause iron buildup in the heart, liver, and pancreas. If not removed, it can damage organs and lead to death. Therefore, patients need to take iron chelation therapy medications such as deferoxamine injection or deferasirox oral to remove excess iron.
The only treatment that can cure beta thalassemia is a stem cell transplant. But it is not easy — it requires a compatible donor, high risk of complications, and high cost. For those who cannot undergo transplants, gene therapy is showing promise. In 2019, a gene therapy called Zynteglo was approved in Europe for beta thalassemia patients requiring transfusions. It involves genetically modifying the patient's own stem cells to produce functional beta-globin.
Life with Beta Thalassemia
For patients with beta thalassemia minor or thalassemia trait, they usually do not require treatment. However, it is important for them to know their status — especially in family planning. If two carriers marry, there is a 25% chance their child will inherit the major form. Therefore, pre-marriage screening is strongly recommended in countries with high thalassemia rates such as Malaysia, Thailand, and Indonesia.
For major patients, life can still be meaningful with consistent treatment. Many adult patients undergoing transfusions and iron chelation therapy are able to study, work, and have families. However, they need to be disciplined with their treatment, regularly monitor their organ health, and avoid foods rich in iron such as liver and red meat.
Beta thalassemia is not a death sentence. With medical advances, patients can now live longer and healthier lives. Society also needs to be more aware — don't underestimate the symptoms of anemia that seem ordinary. Sometimes, behind the pale and tired appearance that seems trivial, there is an inherited disease waiting to be diagnosed.
Rujukan: Beta thalassemia — Wikipedia https://en.wikipedia.org/wiki/Beta thalassemia
