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Related Concept Videos

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Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of inhibitors. Drugs and other toxins can also inhibit enzymes. Some inhibitors bind to the enzyme’s active site, while others inhibit enzymatic activity by binding to other sites on the protein structure.
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Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
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α-glucosidase inhibitors, including acarbose (Precose), miglitol (Glyset), and voglibose (Voglib) (primarily available in Asia), are drugs that control blood sugar levels by delaying the digestion of starch and disaccharides. They achieve this by inhibiting α-glucosidase enzymes in the intestine, which slow the absorption of carbohydrates in the intestine, which in turn leads to a prolonged release of the glucoregulatory hormone GLP-1 from intestinal L-cells.
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High-Affinity Copolymers Inhibit Digestive Enzymes by Surface Recognition.

Patrick Gilles, Kirstin Wenck, Inga Stratmann

  • 1Heriot-Watt University , Edinburgh, Scotland, United Kingdom EH14 4AS.

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Researchers developed a method to create polymeric surface binders for digestion enzymes. This approach uses copolymerization and screening to find effective enzyme inhibitors by blocking active sites.

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Area of Science:

  • Polymer Chemistry
  • Biochemistry
  • Enzyme Inhibition

Background:

  • Developing targeted enzyme inhibitors is crucial for various applications.
  • Existing methods for creating enzyme inhibitors can be complex and time-consuming.

Purpose of the Study:

  • To present a general, parallelizable method for constructing polymeric surface binders for digestion enzymes.
  • To identify efficient polymeric inhibitors for various digestive enzymes.

Main Methods:

  • Free radical copolymerization of amino-acid-selective comonomers to create polymer libraries.
  • Microscale synthesis yielding water-soluble affinity polymers.
  • Parallel screening of polymer libraries using standard enzyme assays.
  • Determination of IC50 values for identified polymeric inhibitors.

Main Results:

  • A library of water-soluble affinity polymers was synthesized and found to be stable at room temperature.
  • Effective polymeric inhibitors were identified for most digestion enzymes, excluding elastase.
  • Some inhibitors demonstrated selectivity towards specific protein targets.
  • The most effective inhibitors utilized monomers that bind near the enzyme's active site.

Conclusions:

  • Efficient coverage of an enzyme's active site environment by copolymers is critical for potent inhibition.
  • Polymeric inhibitors function by blocking substrate access and product exit from the active site.
  • The developed method offers a versatile platform for discovering enzyme inhibitors.