Encapsulation of implanted foreign bodies by haemocytes in Ostrinia furnacalis larvae
2007
LU Jian-feng | HU Jian | CHEN Xue-xin | ZHU Xiang-xiong | FU Wen-jun
Encapsulation by haemocytes in Ostrinia furnacalis larvae was biphasic. When DEAE-Sephadex beads were introduced into the haemocoele of O. furnacalis larvae, granular cells first attached to the surface of the beads within 3 minutes, which was followed by the attachment of multiple layers of plasmatocytes, eventually forming a smooth capsule comprised of overlapping layers of cells until 48 h post injection. The complete capsule showed three distinct regions. The role of the initial identification of foreign bodies within the haemocoele was played by the granular cells. Once the beads were identified as foreign bodies by granular cells, some putative materials released by lysed granular cells would induce plasmatocytes to recognize the foreign bodies, and then encapsulation was immediately triggered. Collectively, these results suggested that encapsulation in O. furnacalis larvae obviously depends on a cooperative response between haemocytes.
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