Hi,
Liver function tests measure two proteins albumin and globulin. Globulin includes antibodies as well. Globulins are raised when liver cells are damaged, like in autoimmune diseases, long standing liver disease, cirrhosis etc.
these are some of the conditions that can cause low globuline levels
The serum globulin level may be decreased in:
Nephrosis (A Condition in which the kidney does not filter the protein from the blood and it leaks into the urine)
Alpha-1 Antitrypsin Deficiency (Emphysema)
Acute hemolytic anemia
Liver dysfunction
Hypogammaglobulinemia/Agammaglobulinemia
a few test that i can think of off of the top of my head that need to be run are kidney and liver function tests and a complete blood count with differential