Hemolymph Extraction
Hemolymph Extraction - Related Videos
05:52
Insulin Injection and Hemolymph Extraction to Measure Insulin Sensitivity in Adult Drosophila melanogaster
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Cited by 16 •
2011
Conserved insulin signaling pathways found in the fruit fly Drosophila melanogaster make this organism a potential tool for modeling metabolic disorders including type II diabetes. To this end, it is critical to establish physiological assays to effectively measure systemic insulin action in peripheral glucose disposal in the adult fly.
02:01
Cuticle Disruption: A Method to Collect Hemolymph from Drosophila Larvae
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2023
The Drosophila hemolymph serves as both blood and interstitial fluid, circulating throughout the body during the larva and adult stages. This video describes a protocol to collect larval hemolymph in order to quantify the circulating cells.
08:42
Methods for Comparing Nutrients in Beebread Made by Africanized and European Honey Bees and the Effects on Hemolymph Protein Titers
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Cited by 15 •
2015
Here are methods to quantify nutrients in pollen before and after its conversion to beebread by two subspecies of honeybees. We describe techniques to measure beebread consumption and resulting protein titers in both subspecies.
07:35
A Simple Protocol for Extracting Hemocytes from Wild Caterpillars
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Cited by 26 •
2012
Insect hemocytes carry out many important functions, both immune and non-immune, throughout all stages of insect development. Our present knowledge of hemocyte types and function comes from studies on insect genetic models. Here, we present a method for extracting, quantifying and visualizing hemocytes from wild caterpillars.
03:22
Extraction of Saliva, Haemolymph, Salivary Glands, and Midgut from Individual Ticks (Acari: Ixodidae)
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Cited by 2 •
2025
Here, we present a protocol to collect saliva, haemolymph, salivary glands, and midgut, following the dissection of an individual fed tick, to study tissue-specific localization of tick-borne pathogens to advance understanding of vector competence and pathogen-microbiome interactions.
FAQs
In arthropods and other invertebrates with open circulation, hemolymph occupies the hemocoel rather than remaining within a continuous network of blood vessels. Sampling therefore focuses on accessing an appropriate body region and collecting fluid from the body cavity. This anatomical arrangement allows researchers to examine circulating material that reflects physiological, immune, metabolic, hormonal, and stress-related processes.
Contamination can introduce material that does not originate from the animal’s circulatory fluid, while clotting can alter the sample before analysis. Careful puncturing or opening, followed by prompt transfer into a collection vessel, helps preserve the collected material. These precautions are especially important when researchers evaluate immune cells, soluble defense factors, metabolites, hormones, or infection-related changes.
The collected fluid can be analyzed at both cellular and biochemical levels. Cellular studies may focus on immune cells, whereas biochemical analyses can examine soluble defense factors, metabolites, and hormones. Measuring these different components gives researchers complementary information about invertebrate physiology, immune activity, development, and responses to infection or environmental stress.
The key distinction is the organization of the circulatory system. In the arthropods and other invertebrates described here, hemolymph occupies the hemocoel within an open system, so collection involves accessing a body region or cavity rather than sampling fluid from a closed vessel network. This difference determines the sampling approach and the precautions needed to limit contamination.
A basic workflow begins by carefully puncturing or opening a suitable body region, allowing the hemolymph to become accessible, and transferring it into a collection vessel. The procedure should be conducted in a way that limits contamination and clotting. The resulting sample can then be directed toward cellular, physiological, or biochemical analysis according to the study objective.
Researchers use this sampling technique when they need to investigate invertebrate physiology, host-pathogen interactions, development, or toxicology. It can support comparisons involving infection or environmental stress by providing material for analysis of immune cells, soluble defense factors, metabolites, and hormones. The approach is therefore useful for connecting circulating biological changes with broader experimental conditions.