Type V hypersensitivity reaction
- Type V hypersensitivity reaction
A Type V hypersensitivity reaction occurs when IgG class antibodies directed towards cell surface antigens have a stimulating effect on their target.
Grave's disease is an example of this type of hypersensitivity reaction. This disease is also considered as type II hypersensitivity reaction. Type II hypersensitivity reaction can be divided into 3 types according to the mechanism, viz Opsonization and Complement- and Fc Receptor- mediated phagocytosis, Complement- and Fc receptor- mediated inflammation, and Antibody- mediated cellular dysfunction. Grave's disease is said to fall under the third category by most. The difference is that, instead of dysfunction, there is antibody mediated stimulation of cell function. So, some have isolated this special type and have named it type V hypersensitivity reaction.
Wikimedia Foundation.
2010.
Look at other dictionaries:
type IV hypersensitivity — hypersensitivity initiated by antigen specific T lymphocytes; unlike forms mediated by antibodies, it takes one or more days to develop and can be transferred by lymphocytes but not by serum. The term is often equated with delayed… … Medical dictionary
type I hypersensitivity — hypersensitivity that occurs rapidly (within several minutes) upon reexposure to an antigen, due to interaction of IgE and the antigen; see type I hypersensitivity reaction, under hypersensitivity reaction, at reaction … Medical dictionary
type II hypersensitivity — hypersensitivity resulting from antibody antigen interactions on cell surfaces; see type II hypersensitivity reaction, under hypersensitivity reaction, at reaction. Called also antibody mediated h … Medical dictionary
type III hypersensitivity — hypersensitivity due to formation of circulating antigen antibody complexes and their deposition in tissues; see type III hypersensitivity reaction, under hypersensitivity reaction, at reaction. Called also immune complex–mediated h … Medical dictionary
Type III hypersensitivity — Infobox Disease Name = PAGENAME Caption = DiseasesDB = ICD10 = ICD9 = ICDO = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = D007105 Type III hypersensitivity occurs when antigens and antibodies are present in roughly equal amounts … Wikipedia
Type IV hypersensitivity — Classification and external resources MeSH D006968 Type IV hypersensitivity is often called delayed type hypersensitivity as the reaction takes two to three days to develop. Unlike the other types, it is not antibody mediated but rather is a type … Wikipedia
Type I hypersensitivity — Infobox Disease Name = Type I hypersensitivity Caption = SEM of miscellaneous plant pollens. Pollens are very common allergens. DiseasesDB = ICD10 = ICD9 = ICDO = OMIM = MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = D006969 Type I… … Wikipedia
Type II hypersensitivity — In type II hypersensitivity (or cytotoxic hypersensitivity)cite web |url=http://pathmicro.med.sc.edu/ghaffar/hyper00.htm |title=Hypersensitivity reactions |format= |work= |accessdate=] the antibodies produced by the immune response bind to… … Wikipedia
cell-mediated hypersensitivity reaction — type IV hypersensitivity r … Medical dictionary
antibody-mediated hypersensitivity reaction — 1. type II hypersensitivity r. 2. occasionally, any hypersensitivity reaction in which antibodies are the primary mediators, as contrasted with those mediated by T lymphocytes; included are types I, II, and III hypersensitivity r s … Medical dictionary
