IGF-1 is a peptide that mediates some of the effects of growth hormone and acts through the IGF-1 receptor to control tissue growth and remodeling. In the brain, IGF-1 functions as a neurotrophic factor that, like BDNF, plays a significant role in cognition, neurogenesis, and neuronal survival.
CMV IgG is a type of blood test to test the presence of IgG antibodies which are active in the event of a CMV or cytomegalovirus infection.IgG antibodies are protein substances that are produced by the body to fight the infection caused by the cytomegalovirus.O fasting is required when taking the CMV IgG blood test. The blood sample of the patient involved will be studied in the laboratory for the presence of IgG antibodies or proteins. A positive result could mean that the person being tested has had a past or recent infection with the cytomegalovirus.
The IgG class of antibodies is composed of four different subtypes of IgG molecules called the IgG subclasses. These are designated IgG1, IgG2, IgG3 and IgG4. Patients with persistently low levels of one or two IgG subclasses and a normal total IgG level have a selective IgG subclass deficiency.