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Related Concept Videos

Allergic Drug Reactions01:27

Allergic Drug Reactions

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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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Microbiome of the Eye01:22

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The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...
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Ophthalmic Drug Delivery Systems01:23

Ophthalmic Drug Delivery Systems

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Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...
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Hypersensitivities01:30

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Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
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Overview
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Drug Toxicity: Allergic Reactions01:30

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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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Related Experiment Video

Updated: Apr 30, 2026

Induction of Ocular Surface Inflammation and Collection of Involved Tissues
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[Basic immunology and current therapeutic concepts in ocular allergy].

U Gehlsen1, C Cursiefen1, P Steven1

  • 1Zentrum für Augenheilkunde, Uniklinik Köln.

Klinische Monatsblatter Fur Augenheilkunde
|May 7, 2014
PubMed
Summary

Ocular allergy, a common global condition, involves complex immune responses. Current treatments manage symptoms, while future therapies aim for causal treatments by targeting lymphangiogenesis.

Area of Science:

  • Immunology
  • Ophthalmology

Context:

  • Ocular allergy is a prevalent global health issue.
  • Understanding its diverse clinical phenotypes and immunopathogenesis is crucial for effective treatment.
  • This review synthesizes current knowledge on ocular allergy's immunological basis.

Purpose:

  • To review the fundamental immunological processes underlying ocular allergy.
  • To discuss current therapeutic strategies for ocular allergy.
  • To explore emerging therapeutic avenues and future directions.

Summary:

  • Ocular allergy involves various immune cells, including dendritic cells, B-cells, T-cells, mast cells, eosinophils, and regulatory T-cells.
  • Current treatments include antihistamines, mast cell stabilizers, steroids, and calcineurin inhibitors.

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  • The relationship between ocular allergy and dry eye disease remains an area for further investigation.

    • Impact:

    • Provides a comprehensive overview of ocular allergy immunopathogenesis and treatment.
    • Highlights the need for further research into unresolved questions, such as the link with dry eye disease.
    • Suggests that future therapies targeting lymphangiogenesis may offer more causal treatment options for ocular allergy.