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Blood Types

Blood Types

Human blood is classified into different types based on the presence of antigens on the red blood cell's surface and antibodies in the plasma. Proper identification of blood type is essential for successful blood transfusion. The International Society of Blood Transfusion has identified 38 human blood types based on the surface antigens on the red blood cells. The most common types are ABO, Rh, and MNS blood types.
ABO blood group
ABO antigens are glycoproteins encoded by genes present on...

Blood Transfusion and Agglutination

Blood Transfusion and Agglutination

Blood transfusion is a therapeutic measure to restore the blood volume after extensive blood loss due to an accident or a medical procedure. Blood transfusion involves drawing a certain amount of blood from a suitable donor and infusing it into the recipient.
History
The history of blood transfusion dates back to the 17th century, when early attempts were made in animals. In 1818 James Blundell, a British doctor, performed the first successful human blood transfusion. Later in 1900, Karl...

The ABO Blood Group

The ABO Blood Group

The ABO blood group system is a critical element of transfusion medicine, essential for determining blood compatibility in transfusions and organ transplants. It is based on specific antigens, or agglutinogens, present on the surface of red blood cells (RBCs) and corresponding antibodies, or agglutinins, in the blood plasma.
Antigens in the ABO Blood Group System
Antigens are substances that can trigger an immune response, leading to the production of antibodies. In the ABO blood group system,...

Rh Blood Group

Rh Blood Group

The Rhesus (Rh) antigen is crucial in determining blood groups and ensuring compatibility during blood transfusions.

Blood Typing

Blood Typing

Understanding an individual's blood group is a critical component of transfusion medicine. It ensures compatibility in blood transfusions, organ transplants, and even during pregnancy. Determining these blood groups involves the ABO and Rh blood typing systems, utilizing specific antigens and corresponding anti-sera to identify an individual's blood type.
Antigens are protein molecules that reside on the surface of red blood cells (RBCs). The ABO and Rh blood typing systems target antigens A,...

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Distribution of haptoglobin subtypes in French Basques.

J Constans, M Viau

|January 1, 1975

Summary

This summary is machine-generated.

This study analyzed haptoglobin (Hp) gene frequencies in French and Basque populations. The Hp1S gene showed a slightly higher frequency in the Basque sample compared to the Toulouse sample.

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Personalized Peptide Arrays for Detection of HLA Alloantibodies in Organ Transplantation

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Area of Science:

Population genetics
Human genetics
Biochemistry

Background:

Haptoglobin (Hp) is a protein involved in hemoglobin binding.
Hp gene polymorphism (Hp1F, Hp1S, Hp2) is studied in various human populations.
Previous research established baseline Hp gene frequencies in Caucasoid populations.

Purpose of the Study:

To investigate the frequencies of Haptoglobin (Hp) 1F, 1S, and 2 gene variants.
To compare Hp gene frequencies between two distinct French population groups: Toulouse and a Basque district.
To analyze the distribution of Hp alpha1F and alpha1S polypeptide chains.

Main Methods:

Population sampling from Toulouse and a Basque district in France.
Determination of haptoglobin (Hp) gene frequencies (Hp1F, Hp1S, Hp2).
Analysis of hp alpha1F and alpha1S polypeptide chains using a straightforward technique.

Main Results:

Observed haptoglobin (Hp) gene frequencies align with previous findings in Caucasoid populations.
The frequency of the Hp1S gene was found to be marginally higher in the Basque population sample.
Hp alpha1F and alpha1S polypeptide chains were successfully identified.

Conclusions:

The genetic profiles of the Toulouse and Basque populations regarding haptoglobin (Hp) genes are consistent with broader Caucasoid patterns.
A subtle but notable difference in Hp1S gene frequency exists between the studied Basque and Toulouse populations.
The employed method for polypeptide chain determination is effective for population genetic studies.