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==Overview==
==Overview==
Allergy, as a concept, was first defined in the early 1900s. It has later developed into several different disease mechanisms related to disordered activation of immune system. The overall study of allergy, as a concept, drastically evolved in the 1960s with the discovery of [[immunoglobulin E]] (IgE) - [[Kimishige Ishizaka]].
The term "[[allergy]]" was first coined in the early 1900s. It has since evolved into a number of distinct disease mechanisms linked to immune system activation that is disordered. With the discovery of [[immunoglobulin E]] ([[IgE]]) - Kimishige Ishizaka - in the 1960s, the overall study of [[allergy]] as a concept changed dramatically.


==Historical Perspective==
==Historical Perspective==
The concept "allergy" was originally introduced in 1906 by the Viennese [[pediatrician]] [[Clemens von Pirquet]], after noting that some of his patients were hypersensitive to normally innocuous entities such as dust, [[pollen]], or certain foods.<ref>{{WhoNamedIt|Doctor|2382|Clemens Peter Pirquet von Cesenatico}}</ref>  Pirquet called this phenomenon "allergy" from the Greek words ''allos'' meaning "other" and ''ergon'' meaning "work".<ref>{{cite journal|author=Von Pirquet C|year=1906|title=Allergie|journal=Munch Med Wochenschr|volume=53|pages=1457}}</ref> Historically, all forms of hypersensitivity were classified as allergies, and all were thought to be caused by an improper activation of the immune system. Later, it became clear that several different [[disease]] mechanisms were implicated, with the common link to a disordered activation of the immune system. In 1963, a new classification scheme was designed by [[Philip George Houthem Gell|Philip Gell]] and [[Robin Coombs]] that described four types of [[hypersensitivities|hypersensitivity reactions]], known as Type I to Type IV hypersensitivity.<ref name=GellCoombs>{{cite book |author=Gell PGH, Coombs RRA. |title=Clinical Aspects of Immunology |publisher=Blackwell |location=London |year=1963}}</ref> With this new classification, the word "allergy" was restricted to only type I hypersensitivities (also called immediate hypersensitivity), which are characterized as rapidly developing reactions.
Clemens von Pirquet, a Viennese pediatrician, coined the term "[[allergy]]" in 1906 after observing that some of his patients were [[hypersensitive]] to normally harmless substances such as [[dust]], [[pollen]], or certain foods. Pirquet coined the term "[[allergy]]" from the [[Greek]] words allos, which means "other," and ergon, which means "work."<ref>{{cite journal|author=Von Pirquet C|year=1906|title=Allergie|journal=Munch Med Wochenschr|volume=53|pages=1457}}</ref> All forms of [[hypersensitivity]] were previously categorized as [[allergies]], and they were all believed to be caused by an inappropriate [[immune system]] activation. Later, it became apparent that several different [[disease]] mechanisms were involved, all of which were linked to a disordered [[immune system]] activation. Philip Gell and Robin Coombs devised a new classification scheme in 1963 that defined four types of hypersensitivity reactions, referred to as Type I to Type IV hypersensitivity.<ref name=GellCoombs>{{cite book |author=Gell PGH, Coombs RRA. |title=Clinical Aspects of Immunology |publisher=Blackwell |location=London |year=1963}}</ref> The term "[[allergy]]" was now limited to [[type I hypersensitivities]] (also known as immediate [[hypersensitivity]]), which are characterized by rapidly developing reactions.  
 
The [[discovery]] of the antibody class labeled [[immunoglobulin E]] ([[IgE]]) in the 1960s was a significant breakthrough in understanding the mechanisms of [[allergy]]. Kimishige Ishizaka and co-workers were the first to isolate and characterize [[IgE]].<ref>{{cite journal |author=Ishizaka K, Ishizaka T, Hornbrook MM |title=Physico-chemical properties of human reaginic antibody. IV. Presence of a unique immunoglobulin as a carrier of reaginic activity |journal=J. Immunol. |volume=97 |issue=1 |pages=75–85 |year=1966 |pmid=4162440 |doi=}}</ref>
A major breakthrough in understanding the mechanisms of allergy was the discovery of the antibody class labeled [[immunoglobulin E]] (IgE) - [[Kimishige Ishizaka]] and co-workers were the first to isolate and describe IgE in the 1960s.<ref>{{cite journal |author=Ishizaka K, Ishizaka T, Hornbrook MM |title=Physico-chemical properties of human reaginic antibody. IV. Presence of a unique immunoglobulin as a carrier of reaginic activity |journal=J. Immunol. |volume=97 |issue=1 |pages=75–85 |year=1966 |pmid=4162440 |doi=}}</ref>


==References==
==References==
{{reflist|2}}
{{reflist|2}}
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Latest revision as of 06:25, 23 March 2021

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Marufa Marium, M.B.B.S[2]

Overview

The term "allergy" was first coined in the early 1900s. It has since evolved into a number of distinct disease mechanisms linked to immune system activation that is disordered. With the discovery of immunoglobulin E (IgE) - Kimishige Ishizaka - in the 1960s, the overall study of allergy as a concept changed dramatically.

Historical Perspective

Clemens von Pirquet, a Viennese pediatrician, coined the term "allergy" in 1906 after observing that some of his patients were hypersensitive to normally harmless substances such as dust, pollen, or certain foods. Pirquet coined the term "allergy" from the Greek words allos, which means "other," and ergon, which means "work."[1] All forms of hypersensitivity were previously categorized as allergies, and they were all believed to be caused by an inappropriate immune system activation. Later, it became apparent that several different disease mechanisms were involved, all of which were linked to a disordered immune system activation. Philip Gell and Robin Coombs devised a new classification scheme in 1963 that defined four types of hypersensitivity reactions, referred to as Type I to Type IV hypersensitivity.[2] The term "allergy" was now limited to type I hypersensitivities (also known as immediate hypersensitivity), which are characterized by rapidly developing reactions. The discovery of the antibody class labeled immunoglobulin E (IgE) in the 1960s was a significant breakthrough in understanding the mechanisms of allergy. Kimishige Ishizaka and co-workers were the first to isolate and characterize IgE.[3]

References

  1. Von Pirquet C (1906). "Allergie". Munch Med Wochenschr. 53: 1457.
  2. Gell PGH, Coombs RRA. (1963). Clinical Aspects of Immunology. London: Blackwell.
  3. Ishizaka K, Ishizaka T, Hornbrook MM (1966). "Physico-chemical properties of human reaginic antibody. IV. Presence of a unique immunoglobulin as a carrier of reaginic activity". J. Immunol. 97 (1): 75–85. PMID 4162440.

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