What Causes Elevated Aspartate Aminotransferase (AST)?
May 14, 2022
Source: Cainiu Health
Dr. Jin Zhongkui
Introduction
Pathological factors: Clinical practice has established that hepatitis is a significant cause of elevated aspartate aminotransferase (AST) levels. Affected patients typically also exhibit increased AST levels. Examination often reveals evident hepatocellular necrosis, and serum aminotransferase levels—including AST—are markedly elevated. This represents a non-negligible pathological factor contributing to the elevation of various enzymes in the body.
Aspartate aminotransferase (AST) is primarily found in the human liver and is a relatively common finding in clinical practice. Many individuals become puzzled upon receiving an elevated AST result and wish to understand its underlying cause. So, what causes elevated aspartate aminotransferase levels?
Causes of Elevated Aspartate Aminotransferase
Pathological factors. Clinical experience indicates that hepatitis is a major contributor to elevated AST levels. Affected patients often concurrently exhibit increased alanine aminotransferase (ALT) levels. Laboratory testing typically reveals evident hepatocyte necrosis. AST levels rise significantly, representing a clinically significant pathological factor contributing to generalized elevation of multiple enzymes. Additionally, myocardial infarction can elevate AST levels; similarly, certain cases of pneumonia, myocarditis, and nephritis may also present with elevated AST.
Non-pathological factors. Numerous external factors may transiently elevate AST levels—for instance, routine testing performed shortly after vigorous physical exercise. Similarly, overeating, excessive alcohol consumption, sleep deprivation, and intense emotional fluctuations can all lead to increased AST levels. Certain medications—including anti-inflammatory drugs and common cold remedies—may also cause AST elevation.
Such drug-induced elevations usually resolve gradually after discontinuation of the offending agent. Importantly, pathological and non-pathological causes of AST elevation may be easily confused; therefore, repeat testing and careful differential diagnosis are recommended when clinically indicated. We hope this information proves helpful to you!
