Properdin deficiency

Properdin Deficiency

Properdin deficiency (pronunciation: proh-PUR-din deh-fish-EN-see) is a rare genetic disorder that affects the immune system. It is characterized by a lack of or low levels of a protein called properdin in the blood.

Etymology

The term "properdin" is derived from the Latin words "pro", meaning "for", and "perdere", meaning "to lose". This refers to the protein's role in promoting the loss of harmful substances from the body. The term "deficiency" comes from the Latin "deficere", meaning "to lack".

Definition

Properdin deficiency is a condition in which the body does not produce enough properdin, a protein that plays a crucial role in the complement system, a part of the immune system that helps the body fight off infections. This deficiency can lead to an increased susceptibility to certain types of bacterial infections, particularly those caused by Neisseria meningitidis, a bacterium that can cause meningitis and sepsis.

Symptoms

Symptoms of properdin deficiency can vary greatly from person to person, but they often include frequent infections, especially of the respiratory tract, and severe reactions to certain types of bacteria. In severe cases, individuals with properdin deficiency may develop life-threatening conditions such as meningitis or sepsis.

Causes

Properdin deficiency is caused by mutations in the PFCP gene, which provides instructions for making the properdin protein. These mutations prevent the body from producing enough properdin, leading to a weakened immune response.

Treatment

There is currently no cure for properdin deficiency, but treatment typically involves managing symptoms and preventing infections. This may include the use of antibiotics, immunizations, and in some cases, plasma infusion therapy to increase the levels of properdin in the blood.

Related Terms

• Complement system
• Genetic disorder
• Immune system
• Meningitis
• Neisseria meningitidis
• PFCP gene
• Plasma infusion
• Properdin
• Sepsis

External links

• Medical encyclopedia article on Properdin deficiency
• Wikipedia's article - Properdin deficiency

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