Intrinsic Clearance
Intrinsic Clearance - Related Videos
02:18
Intrinsically Disordered Proteins
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2020
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
01:09
Hepatic Drug Clearance: Restrictive and Nonrestrictive Clearance
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2025
Hepatic clearance refers to the volume of blood cleared of a drug by the liver per unit of time. It plays a crucial role in drug metabolism and elimination. While hepatic clearance is commonly estimated by subtracting renal clearance from total body clearance, other pathways, such as pulmonary or biliary clearance, may also contribute. However, these pathways are generally less significant than hepatic and renal clearance. Most drugs undergo restrictive clearance, which is proportional to the...
08:59
Live Imaging of Apoptotic Cell Clearance during Drosophila Embryogenesis
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Cited by 10 •
2013
Here we describe an effective method for studying dynamics of apoptotic cell clearance in vivo. This method employs live Drosophila embryos as a powerful model for monitoring phagocytosis of apoptotic cells using specific labeling of apoptotic cells and phagocytes.
01:23
Renal Clearance
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2024
The glomerular filtration rate (GFR) is a critical marker of kidney function, reflecting the efficiency of filtration by the glomeruli. Renal clearance of specific substances, such as inulin or creatinine, is commonly used to measure GFR. Renal clearance refers to the volume of plasma cleared of a specific substance, such as creatinine, per unit of time. To measure clearance, urine samples are collected over a 24-hour period during each bladder voiding, followed by a single blood sample at the...
01:33
Investigating Autophagy-Mediated Clearance of Intracellular Bacteria In Vitro
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2026
Take pig kidney cell cultures, with one culture pre-treated with an inhibitor that increases lysosomal pH, impairing autophagic-lysosomal degradation.Add pathogenic bacteria and centrifuge to enhance host-pathogen contact.Incubate to allow bacterial invasion and internalization into endocytic vesicles.The internalized bacteria consume host nutrients to replicate, triggering metabolic stress.This stress activates autophagy, where an autophagic membrane expands around the vesicle, forming an...
FAQs
Enzyme-mediated biotransformation and transporter activity jointly determine how rapidly a drug is removed in the test system. Enzymes chemically transform the compound, while transporters contribute to its movement into or out of relevant cells or compartments. Measuring their combined effect helps investigators interpret intrinsic clearance as a product of multiple cellular processes rather than a single enzyme measurement.
Intrinsic clearance isolates the organ’s processing capacity from blood-flow effects, making it useful for comparing metabolic or transport behavior under controlled conditions. Clinical prediction requires reintegrating this capacity with hepatic blood flow, protein binding, and an organ model. That combined approach connects an in vitro estimate with hepatic drug elimination and shows why laboratory capacity alone does not determine in vivo exposure.
Protein binding is one of the variables that must be incorporated when an intrinsic-clearance estimate is translated into a clinical prediction. Considered alongside hepatic blood flow and organ models, it helps place the measured cellular capacity into the physiological setting that determines drug elimination. Including these connected factors improves interpretation of predicted bioavailability and dose requirements.
Researchers expose hepatocytes or microsomes to the drug under controlled conditions and measure how quickly the drug concentration declines. The observed decline provides an estimate of the system’s drug-processing capacity. Investigators can then integrate that estimate with hepatic blood flow, protein binding, and an organ model to support predictions of elimination and bioavailability.
Intrinsic clearance represents contributions from both enzyme-mediated biotransformation and transporter activity, providing a mechanistic input for evaluating drug-processing capacity. When this information is incorporated into hepatic organ models with blood flow and protein binding, it can support predictions of drug-drug interactions. The resulting analysis helps connect cellular observations with clinically relevant changes in drug handling.
Intrinsic clearance helps translate cellular measurements of drug metabolism and transport into predictions of hepatic elimination, bioavailability, and dose requirements. Its clinical value comes from integration with hepatic blood flow, protein binding, and organ models rather than from the estimate alone. These combined predictions can support safer therapy tailored to an individual’s expected drug-handling characteristics.