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7 - Controversies about the coagulocyte

Published online by Cambridge University Press:  04 August 2010

Ch. Grégoire
Affiliation:
Laboratory of General and Comparative Biochemistry, University of Liège, 17 Place Delcour, B-4020 Liège, Belgium
G. Goffinet
Affiliation:
Laboratory of General and Comparative Biochemistry, University of Liège, 17 Place Delcour, B-4020 Liège, Belgium
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Summary

Introduction

The literature on the coagulocyte (CO) has been reviewed in several papers (Grégoire, 1951, 1964, 1970, 1971, 1974; Hinton, 1954; Wigglesworth, 1959; Jones, 1962, 1964; Arnold, 1974; Ratcliffe and Price, 1974). The most recent review is by Crossley (1975).

The CO is a newcomer in the considerable and highly controversial literature on insect hemocytes. Mentioned without details by Yeager and Knight (1933) in the hemolymph of Belostoma fluminea, this labile hemocyte has been missed in works in which old, classic methods of fixation and staining were used. The phase-contrast microscope (PCM) made it possible to observe in thin films of hemolymph the specificity of certain hemocytes in initiating plasma coagulation in the form of circular islets around themselves (Grégoire and Florkin, 1950). We named these cells coagulocytes; they were called cystocytes by Jones (1954, 1962). Further PCM studies in vitro on the hemolymph of about 1,600 species of Palearctic, African, and neotropical arthropods (Grégoire, 1951, 1955a,b, 1957, 1959a,b, and unpub. observ.) led to the recognition of four patterns of CO reactions in different taxonomic groups. Hemocyte studies by transmission electron microscopy (TEM) (especially those of Marschall, 1966; Hoffmann and Stoeckel, 1968; Stang-Voss, 1970; Moran, 1971; Scharrer, 1972; Ratcliffe and Price, 1974; Goffinet and Gregoire, 1975) furnished information on the ultrastructure of the cell components, but also opened new controversies. As pointed out by Ratcliffe and Price (1974), without integrated light and electron microscopic studies, correlation of results obtained by the two methods (PCM and TEM) is difficult or impossible.

Type
Chapter
Information
Insect Hemocytes
Development, Forms, Functions and Techniques
, pp. 189 - 230
Publisher: Cambridge University Press
Print publication year: 1979

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  • Controversies about the coagulocyte
    • By Ch. Grégoire, Laboratory of General and Comparative Biochemistry, University of Liège, 17 Place Delcour, B-4020 Liège, Belgium, G. Goffinet, Laboratory of General and Comparative Biochemistry, University of Liège, 17 Place Delcour, B-4020 Liège, Belgium
  • A. P. Gupta
  • Book: Insect Hemocytes
  • Online publication: 04 August 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511759987.008
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  • Controversies about the coagulocyte
    • By Ch. Grégoire, Laboratory of General and Comparative Biochemistry, University of Liège, 17 Place Delcour, B-4020 Liège, Belgium, G. Goffinet, Laboratory of General and Comparative Biochemistry, University of Liège, 17 Place Delcour, B-4020 Liège, Belgium
  • A. P. Gupta
  • Book: Insect Hemocytes
  • Online publication: 04 August 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511759987.008
Available formats
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To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Controversies about the coagulocyte
    • By Ch. Grégoire, Laboratory of General and Comparative Biochemistry, University of Liège, 17 Place Delcour, B-4020 Liège, Belgium, G. Goffinet, Laboratory of General and Comparative Biochemistry, University of Liège, 17 Place Delcour, B-4020 Liège, Belgium
  • A. P. Gupta
  • Book: Insect Hemocytes
  • Online publication: 04 August 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511759987.008
Available formats
×