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A single stimulus can induce both the cell death and survival pathway, suggesting that these pathways share common upstream signaling components. In order to define these components, human U937 cells grown in 10% serum were exposed to serum-free media. This treatment resulted in apoptosis, which was found to be mediated by SAPK/JNK. It was previously reported that the serum withdrawal (SW)-induced...
Reactive oxygen species (ROS) can be generated following cell stimulation and function as intracellular signaling molecules. To determine signaling components involved in ROS induction, human U937 blood cells grown in 10% serum were exposed to serum-free media. It was previously reported that serum withdrawal (SW) killed cells by elevating cellular ROS levels. This study showed that SW activates phosphoinositide...
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