Genetic determinism of parasitic circadian periodicity and subperiodicity in human lymphatic filariasis.
Identifieur interne : 001C77 ( Ncbi/Checkpoint ); précédent : 001C76; suivant : 001C78Genetic determinism of parasitic circadian periodicity and subperiodicity in human lymphatic filariasis.
Auteurs : Gaston Pichon [France] ; Jean-Pierre TreuilSource :
- Comptes rendus biologies [ 1631-0691 ] ; 2004.
Descripteurs français
- KwdFr :
- MESH :
- génétique : Wuchereria bancrofti.
- parasitologie : Filariose lymphatique.
- Animaux, Déterminisme génétique, Humains, Modèles théoriques, Mutation, Rythme circadien.
English descriptors
- KwdEn :
- MESH :
- genetics : Wuchereria bancrofti.
- parasitology : Elephantiasis, Filarial.
- Animals, Circadian Rhythm, Genetic Determinism, Humans, Models, Theoretical, Mutation.
Abstract
The larval parasites of the pantropical lymphatic filariasis exhibit two types of circadian behaviour. Typically, they only appear in the human bloodstream at nighttime, synchronised with their mosquito vectors. In Polynesia and parts of Southeast Asia, free of nocturnal vectors, they are found at all hours, and each population biorhythm differs. Through a geometrical approach, we explain this circadian diversity by a single, dominant mutation: the clocks of individual parasites are set at midnight (ubiquitous) or at 2 p.m. Compared to other circadian genes, this mutation must be very old, as it is shared by four biologically remote genera of parasites. This seniority sheds new light on several theoretical and practical aspects of vector-parasite temporal relations.
PubMed: 15656351
Affiliations:
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pubmed:15656351Le document en format XML
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<front><div type="abstract" xml:lang="en">The larval parasites of the pantropical lymphatic filariasis exhibit two types of circadian behaviour. Typically, they only appear in the human bloodstream at nighttime, synchronised with their mosquito vectors. In Polynesia and parts of Southeast Asia, free of nocturnal vectors, they are found at all hours, and each population biorhythm differs. Through a geometrical approach, we explain this circadian diversity by a single, dominant mutation: the clocks of individual parasites are set at midnight (ubiquitous) or at 2 p.m. Compared to other circadian genes, this mutation must be very old, as it is shared by four biologically remote genera of parasites. This seniority sheds new light on several theoretical and practical aspects of vector-parasite temporal relations.</div>
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