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Types of thalassemia differentiated
Different mutations that cause thalassemia
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The thalassemia’s are the commonest monogenic diseases in man, it is a diverse blood related genetic disorder which involves errors or absence in genes responsible for the production of the globin chains known as hemoglobin, a protein present in the red blood cells. Thalassemia is an autosomal recessive disorder associated with defective synthesis of alpha or beta chain of hemoglobin (Elborai et al, 2012). The name thalassemia comes from the Greek word “Thalassa” meaning “the sea” because the condition was first described in populations living near the Mediterranean Sea (Nathan, 1988). Nevertheless, the disease is also prevalent in Africa, Middle East, South Asia, and pacific descent (Simon, 1999). Furthermore, thalassemia causes an immense disruption in the hemoglobin synthesis (Nathan, 1998).
Thalassemia patients have a genetic flaw of their red blood cells that affects the cells’ ability to produce normal hemoglobin. Red blood cells use hemoglobin to carry oxygen to tissues. As a result of the defect, most forms of thalassemia produce a chronic, lifelong anemia that begins in early childhood and often must be treated with frequent blood transfusions. According to the World health organization, thalassemia is the world’s most common genetic blood disorder and it is rapidly increasing, 5% of the world’s population are carriers and the percentage of people who are carriers of the gene is as high as 25% in some regions. Three hundred thousand affected babies born each year. The world health organization (WHO) predicts a doubling of these statistics within the next few decades (WHO, 2011).
Types of thalassemia patients vary from minor, major and intermediate. The minor patients are carrier of thalassemia, they do not show any symp...
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...cular Therapies, 1(1520-4383 ), 31-37.
Bianchi, N., Breda, L., Cartegni, L., Casu, C., Fibach, E., Gardenghi, S., Gardner, L.B., Gambari, R., Giardina, P.J., Grady, R.W., Kleinert, D.A., Little, J., Manwani, D., Musso, M., Narla, M., Prus, , E., Rivella, S., and Yazdanbaksh, K. (2012). Thalassemia. Therapeutic Hemoglobin Levels after Gene Transfer in b- Thalassemia Mice and in Hematopoietic Cells of b- Thalassemia and Sickle Cells Disease Patients. 7(3), 1-14.
Elborai, Y., Uwumugambi, A., and Lehmann, L. (2012). Immunotherapy. Hematopoietic Stem Cell Transplantation for Thalassemia. 4(9), 947-956.
Amselem, S., Chibani, J., Gattoni, R., Goossens, M., Stevenin, J., Vidaud, D., and Vidaud, M. (1989). Medical Sciences. A 5' splice-region G -> C mutation in exon 1 of the human fi-globin gene inhibits pre-mRNA splicing: A mechanism for fB+-thalassemia. 86(1), 1041-1045.
Originally thought to be an obscure illness, it was later identified as the most common genetic disorder for those with a Western European background. However, due to its low penetrance rate, only one out of two hundred are said to have the condition. Hemochromatosis is treated by the practice of bloodletting. It is one of the oldest treatments recorded in history, with its earliest records dating as far back as 3000 years ago in ancient Egypt. Routinely bleeding is beneficial as it not only reduces the iron in the bloodstream, but also combats issues such as heart disease and high blood
The diminished rate of synthesis amongst the globin chains was first described from Cooley and Lee. However, the term “Thalassemia: was coined by Whipple and Bradford in 1936 (Bain, 2006). The term “Thalassemia” is derived from the Greek words “Thalassa” (sea) and “Heama” (blood) and refers to disorders associated with defective synthesis of the alpha or beta globin subunits of the hemoglobin molecule. Hemoglobin A (a2B2) is inherited. ...
Lewis, Ricki, (2014), Human Genetics, 11th Edition, Chapter 12. Gene Mutation. [VitalSource Bookshelf Online]. Retrieved from
Thalassemia also known as Cooley’s anemia (Catlin 2003) was originally described by Thomas Cooley in 1925 (Starr 2012). The name Thalassemia came from the Greek name for sea (thalassa). This was due to the fact that for many years, those who had been most affected lived in the vicinity of the Mediterranean Sea (Starr 2012). Beta thalassemia occurs most frequently in people from Mediterranean countries, North Africa, the Middle East, India, Central Asia, and Southeast Asia. Thalassemia is a genetic blood disorder that is inherited from parents. The absence or reduction in the production of hemoglobin is the cause of thalassemia. Hemoglobin is in the red blood cells, it is a protein that carries oxygen to cells throughout the body (Catlin 2011)). Thalassemia is characterized by quantitative defects in the synthesis of either the alpha hemoglobin for Alpha Thalassemia or the beta hemoglobin for Beta Thalassemia (Starr, 2012). It is not widely known how many people are affected by Thalassemia but the US populatio...
Scientists are also studying gene therapy as a good treatment for sickle cell anemia. One day, doctors may be able to stop the disease by changing or replacing the abnormal gene that causes sickle cell anemia.
Sickle cell anemia is an inherited disease of red blood cells. Normally red blood cells contain a protein called hemoglobin A, which carries oxygen to all the organs in the body. With sickle cell anemia, however, the body makes a different kind of protein, called hemoglobin S.
A patient with sickle cell has inherited the condition from both parents, and it all starts in the hemoglobin. Hemoglobin is “an iron-containing protein in red blood cells that reversibly binds to oxygen” (Reece, Urry, Cain, Wasserman, Minorsky, & Jackson, 2011). Obviously, hemoglobin is an important substance for oxygen to be transported in red blood cells. However, a patient with sickle cell has irregular hemoglobin cause by inherited genes. This “oxygen delivery” system cannot function properly because a gene
"Sickle Cell Research: Symptoms, Diagnosis, Treatment and Recent Developments | NIH MedlinePlus the Magazine." U.S National Library of Medicine. U.S. National Library of Medicine, 2011. Web. 06 Mar. 2014.
Sickle cell anemia is the most common in hemoglobin mutation diseases due to mutation to beta-blobin gene. The substitution of valine for glutamate at position 6 of the beta chains paces a nonpolar residue on the outside of hemoglobin S. the oxygen affinity and allosteric properties of hemoglubin are virtually unaffected by this changes. However, this alternation markedly reduces the solubility of the deoxygenated but not the oxygenated form of hemoglobin. Thus, sicking occurs when there is a high concentration of the deoxygenated form of hemoglobin.
Thalassemia is basically a name for similar groups of inherited blood diseases that involve missing or abnormal genes regarding the protein in hemoglobin which is the red blood cells that carry oxygen throughout the body. I will discuss the different types of Thalassemia, how Thalassemia is diagnosed, and the treatments available. I will also discuss the complications and side effects of the treatments, the disease’s causes and effects, and how it is more dominant in some parts of the world than others. Thalassemia is a blood disorder which means the body makes fewer healthy red blood cells and less hemoglobin. Hemoglobin is a protein that carries oxygen throughout the body and having less hemoglobin leads to anemia. Alpha globin and beta globin are the proteins that create Hemoglobin. A defect in the gene that helps control production of alpha or beta goblin leads to Thalassemia. Fewer blood cells leads to anemia, which is the common culprit in Thalassemia.
Galactosemia is a genetically inherited metabolic disorder. This disorder leaves the disabled with a partial or complete lack of the enzyme Galactose – 1 – Phosphate Uridyl Transferase (GALT). This enzyme is found in the bloodstream and it is used for breaking down the sugar galactose. This disorder comes in two different variations. Though there is more than one type, it is still rare, having only 1 in 80,000 births being affected by the disorder.
Individuals who inherited this disease from their parents do not possess the standard hemoglobin that should be contained in RBC. Hemoglobin is a protein present in RBC, which transports oxygen to all parts of the body (National Heart and Blood Institute, 2017). The disease which impairs the hemoglobin’s responsibility, prevents blood cells from receiving the sufficient oxygen, causes RBC to be sickle shaped. Sickle cell disease precedes to several painful health complications such as VOC (vaso- occlusive crises), which are severe pain recurring episodes, that can lead to irreversible organ damage. Sickle cell anemia causes red blood cells to hemolyze continuously through an individual’s lifetime… hemolysis is the breakdown of red blood cells (Krishnamoorthy, et al. 2017). An experimental study was conducted with SCD Townes mice to test a possible solution for sickle cell anemia. Throughout a seven-week span, mice orally conveyed dosages of 100 mg/kg of DMF. DMF known as dimethyl fumarate is small complex molecule and which binds and activates to enhance Nrf2 to enhance Hbf. “Nrf2 is a transcription factor that triggers cytoprotective and antioxidant pathways to limit oxidative damage, inflammation, and increases HbF” (Krishnamoorthy, et al. 2017). Fetal hemoglobin (Hbf) is the hemoglobin present in fetuses; it is responsible for the transportation of oxygen
Albinism is a very serious disease that could end up in death. Albinism is a recessive inherited defect in melanin, which is metabolism in which pigment is absent from skin, hair, and eyes. Albinism in hair, skin, and eyes is called oculocutaneous albinism. Humans that have oculocotaneous albinism are not able to produce melanin. These people have white, yellow, or yellow brown hair, very light ( usually blue ) eyes, and very pale skin. Their eyes may appear pink because they have very little pigment.
The first successful case of stem cell therapy in human was reported in 1959. Bone marrow restorations were observed in leukemia patients who received total body irradiation subsequent by intravenous injection of their twins’ bone marrow (Thomas et al, 1957). Nevertheless, that effect was transient and the following bone marrow transplantation attempts in non-twin patients and donors can eventually lead to patient’s death from graft-versus-host disease (Mathé et al, 1965). During that time, the safety of hematopoietic cells transplantation was not guaranteed because of the limited knowledge in human histocompatibility and immunosuppression. However, the turning point came after the discovery of human leucocyte antigen (HLA) groups (Dausset, 1958; van Rood et al, 1958), HLA typing and compatibility testing were performed prior to the transplantation. In addition, the improvement of immunosuppressive protocol also helps bringing the bone marrow transplantation to become more and more successful (Donnall and Hutchinson, 1999).
There are two main types of thalassemia. The first one is Alpha thalassemia. This occurs when a gene or genes related to the alpha globin protein are missing or mutated. It happens mostly in Southeast Asia, the Middle East, China, and in those of African descent. If one gene is missing or damaged: Your red blood cells might be smaller than normal. You will have no symptoms and you will not need treatment. If two genes are missing or damaged, you will have very mild anemia that will typically not need treatment. This is called alpha thalassemia minor or alpha thalassemia trait. If three genes are missing: You will have mild to moderately severe anemia. This is called hemoglobin H disease. If it is severe, you may need blood transfusions.