HghStudy Definitions

Idiopathic
A disease of unknown cause; of unknown origin.

IGF-1
IGF-1 stands for Insulin-like Growth Factor 1, also called somatomedin C, a protein produced by the liver in response to growth hormone (GH). IGF-1 carries out some of the effects of growth hormone (GH) at the tissue level.

Immunoglobulin G (IgG)
An antibody containing substance produced by human plasma cells in diseased central nervous system plaques. Levels of IgG are increased in the cerebrospinal fluid of most Multiple Sclerosis (MS) patients.

Immunosuppression
Pronounced - IH-myoo-noh-suh-PREH-shun
Suppression of the immune system functions and its ability to fight infections and other diseases. Many medications under investigation for the treatment of MS are immunosuppressants.

Immunosuppressive
Pronounced - IH-myoo-noh-suh-PREH-siv
Describes the ability to decrease the body's immune system responses.

Inherit
In genetics (genetics is the study of inheritance patterns of specific traits), to receive genetic material from your parents through biological processes.

Intramuscular
Into the muscle tissue. Example - Injecting a substance into the muscle - an intramuscular injection.

Intravenous
Into or within a vein. Intravenous usually refers to a way of giving a drug or other substance through a needle or tube inserted into a vein. Also called I.V.

Interferons
Cytokines belonging to a family of antiviral proteins that occur naturally in the body. Gamma interferon is produced by immune system cells, enhances T-cell recognition of antigens, and causes worsening of Multiple Sclerosis (MS) symptoms. Alpha and beta interferon probably exert a suppressive effect on the immune system and may be beneficial in the treatment of Multiple Sclerosis (MS).

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Human Growth Foundation
Pituitary Society
Pituitary Network Association
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