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Allergic Drug Reactions01:27

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Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing...
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Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial...
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An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
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Related Experiment Video

Updated: May 4, 2026

Utilizing a Comprehensive Immunoprecipitation Enrichment System to Identify an Endogenous Post-translational Modification Profile for Target Proteins
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Immune response to chemically modified proteome.

Shweta Bhat1, Sheon Mary, Reema Banarjee

  • 1Proteomics Facility, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, India.

Proteomics. Clinical Applications
|December 31, 2013
PubMed
Summary
This summary is machine-generated.

Chemical modifications of proteins can trigger harmful immune responses, acting as autoantigens in autoimmune diseases. These modifications also play a role in regulating immune responses during infections.

Keywords:
AutoantibodyAutoimmune diseasesImmune complexImmunoproteomicsPTMs

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Area of Science:

  • Immunology
  • Biochemistry
  • Proteomics

Background:

  • Protein post-translational modifications (PTMs) are chemical alterations crucial for cellular function.
  • Some PTMs can create neo-self antigens, eliciting autoimmune responses.
  • Conditions like type I diabetes involve PTMs, such as protein glycation due to hyperglycemia.

Purpose of the Study:

  • To explore the dual role of chemical protein modifications in immune responses.
  • To investigate how modified proteins function as autoantigens in autoimmune diseases.
  • To understand the involvement of PTMs in immune regulation during infections.

Main Methods:

  • Review of existing literature on protein modifications and immune responses.
  • Analysis of the role of chemically modified proteins in autoimmune diseases (e.g., rheumatoid arthritis, lupus, multiple sclerosis).
  • Discussion of proteomic analysis of immune complexes.

Main Results:

  • Chemically modified proteins can be recognized as non-self, initiating aberrant immune reactions.
  • Modified proteins act as autoantigens, forming immune complexes in autoimmune conditions.
  • PTMs are implicated in regulating immune responses during pathogen infections.

Conclusions:

  • Chemical protein modifications significantly regulate immune responses, both in health and disease.
  • Understanding these modifications is key to deciphering autoimmune disease mechanisms.
  • Proteomic approaches offer insights into the role of modified proteins in immunity.