5-fu Resistance
5-fu Resistance - Related Videos
07:19
Fu's Subcutaneous Needling for Knee Osteoarthritis Pain
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Cited by 8 •
2023
We present a protocol for using Fu's subcutaneous needling for knee osteoarthritis pain, which combines swaying movement and reperfusion approach techniques. This protocol has great potential for future applications in myofascial pain treatment and could enhance Fu's subcutaneous needling (FSN) manipulation skills.
08:20
Efficacy of Fu's Subcutaneous Needling on Sciatic Nerve Pain: Behavioral and Electrophysiological Changes in a Chronic Constriction Injury Rat Model
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Cited by 7 •
2023
We present a protocol for using Fu's subcutaneous needling in a chronic constriction injury model to induce sciatic nerve pain in rats.
01:04
5-Number Summary
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2023
In a dataset, the 5-number summary includes the minimum data value, the data value of the first quartile, the median data value or data value of the second quartile, the data value of the third quartile, and the maximum data value. These 5 data values can be visualized as a box and whisker plot. In a box plot, the minimum and maximum data values represent the lower and upper whiskers in the graph, and the median is designated as the center of the box in the chart. The first quartile and third...
01:23
The 5 c's of Pricing
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2024
The 5 Cs of pricing provide a comprehensive framework for strategic pricing decisions. They include: Company Objectives: The company's goals are pivotal in determining pricing. Whether the aim is to maximize profit, increase market share, or survive in a competitive market, it will directly influence the pricing strategy. Cost: It involves calculating the total cost of producing a product or service, including fixed and variable costs. Pricing must cover these costs and provide a reasonable...
07:50
Immunohistochemical Detection of 5-Methylcytosine and 5-Hydroxymethylcytosine in Developing and Postmitotic Mouse Retina
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Cited by 12 •
2018
The objective of this report is to describe the protocol for robust immunohistochemical detection of epigenetic markers, 5-methylcytosine (5mC) and 5-hydroxymethylcytosine (5hmC) in developing and postmitotic mouse retina.
FAQs
Thymidylate synthase activity is a central determinant because 5-fluorouracil normally produces an active metabolite that inhibits this enzyme. If resistant cancer cells increase thymidylate synthase activity, the drug’s disruption of DNA synthesis can be reduced. Measuring this change helps investigators connect a molecular alteration with treatment failure and evaluate whether it could serve as a predictive biomarker.
Resistance can arise before 5-fluorouracil reaches its effective intracellular targets. Altered drug metabolism may change formation of active metabolites, while reduced intracellular drug effects can limit their impact on nucleic acids. These mechanisms are distinct from enhanced DNA repair, which may help cells cope with damage after drug exposure. Separating them clarifies which resistance process a study is examining.
Variation in thymidylate synthase activity, drug metabolism, DNA repair, and intracellular drug effects can make tumors respond differently to the same treatment. This mechanistic diversity helps explain why response is not uniform and motivates the search for predictive biomarkers. Such markers could associate a tumor’s resistance features with the likelihood of benefiting from 5-fluorouracil.
Resistance models provide experimental systems for examining how cancer cells evade 5-fluorouracil activity. Investigators can use them to study changes in thymidylate synthase, drug metabolism, DNA repair, or intracellular drug effects, then assess strategies intended to restore drug effectiveness. Their broader value is translational: findings can guide combination-therapy development and the search for biomarkers linked to treatment response.
Combining treatments is explored because resistance may reflect more than one cellular change, including altered metabolism, increased thymidylate synthase activity, enhanced DNA repair, or reduced intracellular drug effects. A combination strategy seeks to address the mechanism limiting 5-fluorouracil activity rather than treating resistance as a single uniform process. Resistance models help evaluate this rationale in cancer research.
Research on this problem is especially relevant to colorectal, breast, gastrointestinal, and other cancers treated with 5-fluorouracil. Studying these settings connects molecular resistance mechanisms with treatment failure and patient-response differences. The resulting evidence can support biomarker development and approaches designed to restore effectiveness, while recognizing that relevant resistance features may vary between tumors.