Related Experiment Video
Updated: May 16, 2025
08:23
Phenotypic Analysis of Rodent Malaria Parasite Asexual and Sexual Blood Stages and Mosquito Stages
Published on: May 30, 2019
11.4K
Parasite and vector circadian clocks mediate efficient malaria transmission.
Inês Bento1, Brianna A Parrington2, Rushlenne Pascual2
1Gulbenkian Institute for Molecular Medicine, Lisbon, Portugal.
Nature Microbiology
|March 31, 2025
Summary
Mosquito salivary glands show daily rhythms, influencing blood feeding and parasite activity. This suggests a circadian interplay between mosquitoes, malaria parasites, and hosts impacts disease transmission.
Area of Science:
- Vector biology
- Parasitology
- Chronobiology
Background:
- Malaria transmission relies on Anopheles mosquito bloodmeals, which occur nocturnally.
- The role of circadian control in mosquito salivary glands and parasite development is largely unknown.
Purpose of the Study:
- To investigate circadian control in Anopheles salivary glands.
- To determine if Plasmodium parasite development within the vector is under circadian regulation.
- To explore the tripartite relationship between mosquito vectors, malaria parasites, and mammalian hosts.
Main Methods:
- Transcriptome analysis of mosquito salivary glands.
- Measurement of hemoglobin levels to assess bloodmeal intake.
- Analysis of Plasmodium parasite gene expression within the mosquito.
Main Results:
- Approximately 50% of the mosquito salivary gland transcriptome exhibits circadian expression, including genes for blood feeding.
- Mosquitoes exhibit increased blood feeding and hemoglobin intake during nighttime hours.
- A significant portion of salivary gland-resident Plasmodium parasite genes show daily rhythmic expression, impacting motility and infectivity.
Conclusions:
- Mosquito salivary glands are under circadian control, optimizing blood feeding.
- Plasmodium parasites exhibit circadian regulation within the vector, influencing transmission timing.
- A complex circadian relationship exists between the Anopheles mosquito, Plasmodium parasite, and mammalian host, modulating malaria transmission dynamics.
More Related Videos
Related Concept Videos
02:19Circadian Rhythms and Gene Regulation
4.0K
The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
4.0K
00:58Symbiosis
27.1K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
27.1K
02:45Biological Clocks and Seasonal Responses
34.5K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.5K