Crithidia luciliae

Source: Wikipedia, the free encyclopedia.

Crithidia luciliae[1]
Crithidia luciliae. Kinetoplast and nucleus are stained green.
Immunofluorescence staining pattern of anti-dsDNA antibodies on C. luciliae substrate. The kinetoplast, located near the flagellum, is stained, indicating the presence of anti-dsDNA antibodies in a person with SLE.
Scientific classification
Domain:
Eukaryota
(unranked):
Phylum:
Order:
Family:
Trypanosomatidae
Genus:
Species:
C. luciliae
Binomial name
Crithidia luciliae

Crithidia luciliae is a flagellate parasite that uses the housefly,

systemic lupus erythamatosus (SLE). By using C. luciliae as a substrate for immunofluorescence, the organelle can be used to detect anti-dsDNA antibodies, a common feature of the disease.[3][4]

Taxonomy

C. luciliae is a eukaryotic single-cell protozoan. The family

Role in systemic lupus erythematosus diagnosis

The kinetoplast found in C. luciliae allows them to be used for the detection of anti-dsDNA antibodies, a type of

anti-nuclear antibody. Anti-nuclear antibodies are a common feature in SLE, and anti-dsDNA antibodies are highly specific for the disease. The high concentration of dsDNA and the absence of human nuclear antigens in the kinetoplast provides a specific substrate for the detection of anti-dsDNA antibodies.[4][8]

Purine nucleotide and nucleobase uptake

As a parasitic protozoan, C. luciliae lacks the ability to biosynthetically produce purine bases and therefore needs to salvage them from the surrounding environment. Three transport systems are used for the uptake of bases from the host organism: one for the uptake of adenosine and its analogues; one for guanosine, its analogues and inosine; and one for hypoxanthine, adenine and adenosine.[9]

References

  1. ^ "Encyclopedia of Life". Retrieved 27 August 2012.
  2. PMID 14245244
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