Flow Cytometry: Principles and Clinical Applications
Q: In the context of CD4 T-cell enumeration by flow cytometry, why is it critical to process blood samples within a specific timeframe (ideally within 48 hours)?
Did You Know?
The function of terminal steroid and thyroid hormones is particularly vulnerable to disruption by environmental toxicants, known as endocrine-disrupting chemicals (EDCs). This heightened susceptibility stems from several factors. First, their synthesis is complex, involving multiple enzymatic steps that EDCs can inhibit. Second, they rely heavily on transport proteins in the blood; chemicals can displace them from these proteins, altering their availability. Third, they act via intracellular nuclear receptors, and many EDCs are structurally similar enough to mimic or block these hormones at the receptor site. Finally, their elimination involves specific metabolic pathways that toxins can hijack. In contrast, peptide hormones acting on cell surface receptors are less frequently mimicked by common environmental pollutants.
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