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Mechanism of Antibiotic Resistance in MRSA

Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
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Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors01:20

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Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
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Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
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Synthesis and Characterization of an Aspirin-fumarate Prodrug that Inhibits NFκB Activity and Breast Cancer Stem Cells
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Aspirin resistance.

Khaled Mansour1, Ali T Taher, Khaled M Musallam

  • 1Division of Cardiology, Department of Internal Medicine, American University of Beirut Medical Center, Beirut 1107 2020, Lebanon.

Advances in Hematology
|December 5, 2009
PubMed
Summary

Aspirin resistance, or treatment failure, is a growing concern for cardiovascular event prevention. Understanding its causes and improving management strategies are crucial for patient outcomes.

Area of Science:

  • Cardiology
  • Pharmacology
  • Clinical Medicine

Background:

  • Adverse cardiovascular events occur despite aspirin therapy, indicating potential aspirin resistance.
  • Multiple definitions and laboratory tests for aspirin resistance exist, leading to varied prevalence data.
  • Etiologic factors include clinical, genetic, and miscellaneous influences.

Purpose of the Study:

  • To explore the phenomenon of aspirin resistance in cardiovascular disease.
  • To review the definitions, diagnostic methods, and prevalence of aspirin resistance.
  • To discuss the implications and current management strategies for aspirin resistance.

Main Methods:

  • Literature review of studies on aspirin resistance.
  • Analysis of definitions and laboratory testing modalities.

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  • Synthesis of information on etiologic factors and clinical implications.
  • Main Results:

    • Aspirin resistance is reported with a wide prevalence across different clinical settings.
    • Clinical, genetic, and other factors contribute to aspirin resistance.
    • Current management strategies like dose adjustment or adding other antiplatelet agents show limited efficacy and safety.

    Conclusions:

    • Aspirin resistance poses significant clinical challenges.
    • Existing management strategies for aspirin resistance are insufficient.
    • Further research is needed to develop effective and safe treatments for aspirin resistance.