Arthropod Immune System. II. encapsulation of Implanted Nerve Cord and "Plain Gut" Surgical Suture by Granulocytes of Blattella germanica (L.) (Dictyoptera: Blattellidae) : Immunology

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In the German cockroach, Blattella germanica only the granulocyte (GR) encapsulates the nerve cord implants from the American cockroach and "plain gut" surgical suture implants in the abdominal hemocoel. Encapsulation commences about 40min after implantation and is completed in 10days. The completed capsule is often 6.5μm thick, consists of inner and outer regions, which together are composed of about 20 layers, and a 64nm thick outer sheath; the latter when completed, does not show any further attachment of GRs to it, and in fact marks the end of encapsulation. Early on in capsule formation, the innermost GR layer of the inner region seems to secrete melanin, and later other layers produce random melanin deposits in the entire capsule. It seems that in this cockroach, the GR provides both the phenols and the phenol-oxidizing enzyme to produce melanization. Desmosomelike-, intermediate-, B-type gap, and septate cell junctions are present, the latter reported for the first time.
社団法人日本動物学会の論文
1989-04-15