Which of the following enzyme assay is useful to diagnose alcoholism -a) SGOTb) SGPTc) Alkaline phosphatased) Glutamyl aminotransferase
**Core Concept**
The diagnosis of alcoholism often involves assessing liver damage, which can be achieved through various enzyme assays. The key principle here is to identify the enzyme that is most closely associated with liver damage caused by alcohol consumption.
**Why the Correct Answer is Right**
The correct enzyme assay for diagnosing alcoholism is Glutamyl aminotransferase (also known as Gamma-glutamyl transferase or GGT). This enzyme is found in the liver and other organs, and elevated levels are commonly seen in individuals with liver damage caused by alcohol consumption. GGT is a more sensitive marker for alcohol-related liver damage than other liver enzymes like SGOT (Aspartate aminotransferase) and SGPT (Alanine aminotransferase). This is because GGT is more resistant to liver cell membrane damage caused by alcohol, making it a more reliable indicator of chronic alcohol consumption.
**Why Each Wrong Option is Incorrect**
**Option A:** SGOT (Aspartate aminotransferase) is a liver enzyme that is elevated in various conditions, including liver damage, but it is not specific for alcoholism. It can be elevated in other conditions such as myocardial infarction, muscle damage, and viral hepatitis.
**Option B:** SGPT (Alanine aminotransferase) is another liver enzyme that is elevated in various conditions, including liver damage, but it is not specific for alcoholism. It can be elevated in other conditions such as viral hepatitis, muscle damage, and fatty liver disease.
**Option C:** Alkaline phosphatase is a liver enzyme that is elevated in conditions such as cholestasis, bone disorders, and certain liver diseases, but it is not specific for alcoholism.
**Clinical Pearl / High-Yield Fact**
When diagnosing alcoholism, it's essential to remember that GGT levels can remain elevated for several weeks after alcohol consumption has ceased, making it a useful marker for chronic alcohol consumption.
**Correct Answer:** D. Glutamyl aminotransferase