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Microbial induced hemocytic immune reactions in chilopods
L Nevermann1, H E Kaiser, W E Xylander
1Institut für Allgemeine and Spezielle Zoologie, Justus-Liebig-Universität, Giessen, Germany.
In Vivo (Athens, Greece)
|March 1, 1996
Summary
This study reveals how hemocytes in centipedes Scolopendra cingulata and Lithobius forficatus engulf and degrade foreign particles. Immune cell aggregation and nodule formation varied based on particle type, with bacteria triggering larger, more organized responses.
Area of Science:
- Invertebrate immunology
- Cellular and molecular biology
- Myriapod biology
Background:
- Hemocytic immune reactions are crucial for invertebrate defense.
- Understanding these reactions in myriapods provides insights into arthropod immunity.
- Previous research has explored invertebrate cytokines, attraction factors, and gap junctions.
Purpose of the Study:
- To investigate hemocytic immune reactions in two chilopod myriapod species: Scolopendra cingulata and Lithobius forficatus.
- To analyze the in vitro phagocytosis and degradation of various particles by hemocytes.
- To compare hemocyte aggregation and nodule formation in response to different particle types.
Main Methods:
- Hemocytes from Scolopendra cingulata and Lithobius forficatus were cultured in vitro.
- Cultures were challenged with latex beads, fixed rat erythrocytes, or bacteria.
- Hemocyte preparations were analyzed using electron microscopy after 1–4 hours.
Main Results:
- Hemocytes successfully phagocytosed and, where possible, degraded all tested particles.
- Phagocytic cells within nodules were closely surrounded by other hemocytes.
- Nodule formation and hemocyte aggregation differed significantly based on particle type, with bacterial challenge resulting in larger, more compact, and regular nodules.
Conclusions:
- Hemocytes in Scolopendra cingulata and Lithobius forficatus exhibit robust phagocytic and degradative capabilities.
- The nature of the foreign particle influences the structure and size of hemocytic aggregates (nodules).
- Findings contribute to understanding invertebrate immune signaling pathways, potentially involving cytokines, attraction factors, and cell-cell communication mechanisms.