Related Experiment Video
Updated: Aug 3, 2026
12:40
Cultivation of Heligmosomoides Polygyrus: An Immunomodulatory Nematode Parasite and its Secreted Products
Published on: April 6, 2015
Endocrine and neuroendocrine host-parasite relationships
1Department of Entomology, University of California-Riverside 92521-0314.
Receptor
|January 1, 1993
Summary
Parasites and hosts engage in complex biochemical communication, with hormones and neuropeptides significantly influencing host physiology and parasite success in both vertebrates and invertebrates. This intricate interplay highlights the deep coevolutionary relationships shaping these organisms.
Area of Science:
- Endocrinology
- Parasitology
- Biochemistry
- Evolutionary Biology
Background:
- Host-parasite interactions involve intricate biochemical coevolution and communication.
- Hormones, neurohormones, and growth factors play crucial roles in these relationships.
- Parasites can manipulate host physiology and immunity through secreted molecules.
Purpose of the Study:
- To explore the complex biochemical and hormonal crosstalk between parasites and their hosts.
- To understand how parasites influence host endocrine systems and vice versa.
- To highlight the coevolutionary adaptations in host-parasite molecular signaling.
Main Methods:
- Review of existing literature on host-parasite endocrinology.
- Analysis of molecular mechanisms of parasite-host communication.
- Comparative study of hormonal interactions in vertebrate and invertebrate systems.
Main Results:
- Parasites secrete hormones, neuropeptides, and cytokine-like molecules affecting host physiology and immunity.
- Host hormones directly or indirectly influence parasite success.
- Parasitism significantly alters host endocrine status, impacting development, metamorphosis, and reproduction in invertebrates.
- Insect parasitism involves juvenile hormone and ecdysteroids; neuropeptides are also affected.
- Functional links between nervous, neuroendocrine, and immune systems are observed in hosts like snails.
Conclusions:
- Host-parasite interactions are characterized by profound hormonal and neuroendocrine signaling.
- Parasites actively manipulate host endocrine systems for their own benefit.
- The study underscores the deep coevolutionary adaptations in molecular communication between parasites and hosts across diverse taxa.
Related Concept Videos
00:58Symbiosis
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...
02:40Epiphytes, Parasites, and Carnivores
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the biosynthesis of the...
01:26Microbial Interactions: Cooperation
Microbial cooperation involves beneficial interactions in which different species work together for individual or mutual advantage. These interactions can profoundly influence ecological dynamics and evolutionary processes, and they are essential to many pathogenic and symbiotic relationships.Nematode–Bacteria CooperationA striking example is the relationship between the Gram-negative bacterium Xenorhabdus nematophila and the parasitic nematode Steinernema carpocapsae. Juvenile nematodes...
01:22Microbial Interactions: Parasitism
Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...
01:25Colonisation of Pathogens
Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
01:29Malaria
Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...