ATP 生物荧光法测定

The ATP bioluminescence assay uses luciferase enzyme to convert luciferin into oxyluciferin, producing light proportional to ATP levels. Since ATP reflects cellular metabolism and energy status, luminescence intensity directly indicates cell viability. A luminometer quantifies light emission, allowing researchers to assess whether cells are metabolically active or compromised by treatment or disease.

ATP is the primary energy currency produced through cellular respiration, a series of metabolic processes including glycolysis, the TCA cycle, and the electron transport chain. Glycolysis generates two ATP molecules, while the TCA cycle and electron transport chain together produce 36 ATP molecules. This energy powers all cellular functions in living organisms.

Outer wells in a 96-well plate lack surrounding wells on all sides, causing variable temperature and evaporation rates. Filling these wells with water prevents plate-wide evaporation and temperature fluctuations that could interfere with the assay reaction and compromise luminescence readings from experimental wells.

EC50 is the concentration of a compound at which cell viability drops to 50 percent, serving as a standard parameter to assess cytotoxicity. In antiviral research, scientists use the ATP bioluminescence assay to generate concentration-response curves and calculate EC50 values, helping identify effective antiviral compounds that minimize harm to host cells.

Luciferase enzyme uses energy from ATP to convert luciferin into oxyluciferin in the presence of oxygen. This reaction releases byproducts including pyrophosphate, carbon dioxide, and light or luminescence. The amount of light produced is directly proportional to ATP concentration, making it a reliable indicator of cellular energy status.

White 96-well plates reflect light upward toward the luminometer detector, enabling more accurate and sensitive luminescence readings compared to other plate colors. This reflective property maximizes signal detection and reduces background noise, improving the reliability of ATP quantification in the assay.

The assay measures ATP production, which directly reflects mitochondrial activity and oxidative phosphorylation efficiency. By comparing ATP levels in healthy tissue mitochondria versus diseased preparations, researchers can assess whether mitochondrial dysfunction contributes to pathological conditions, providing insights into metabolic disruption in disease.