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. 1977 Apr;16(1):32–36. doi: 10.1128/iai.16.1.32-36.1977

Bactericidal activity of the normal, cell-free hemolymph of silkworms (Bombyx mori).

T Kinoshita, K Inoue
PMCID: PMC421483  PMID: 326674

Abstract

Cell-free hemolymph from silkworm (Bombyx mori) larvae can kill Escherichia coli B/SM. The bactericidal principle can be resolved into at least two factors. One is a lysozyme-like enzyme that can be absorbed on crab shell chitin and on bentonite, and the other (cofactor) is an anionic factor that is of low molecular weight, can pass through the chitin column and a carboxymethyl-cellulose column, and can be eluted from a diethylaminoethyl-cellulose column at mu = 0.15 and pH 7.5. Egg-white lysozyme cannot replace the silkworm lysozyme-like enzyme for restoring the bactericidal activity when it is mixed with the cofactor, although it can enhance the bactericidal activity of the mixture of silkworm enzyme and cofactor. Mg2+ and Ca2+ can inhibit the bactericidal activity.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. BRIGGS J. D. Humoral immunity in lepidopterous larvae. J Exp Zool. 1958 Jun;138(1):155–188. doi: 10.1002/jez.1401380106. [DOI] [PubMed] [Google Scholar]
  2. Bakula M. Antibacterial compounds in the cell-free haemolymph of Drosophila melanogaster. J Insect Physiol. 1970 Jan;16(1):185–197. doi: 10.1016/0022-1910(70)90125-3. [DOI] [PubMed] [Google Scholar]
  3. Boman H. G., Nilsson-Faye I., Paul K., Rasmuson T., Jr Insect immunity. I. Characteristics of an inducible cell-free antibacterial reaction in hemolymph of Samia cynthia pupae. Infect Immun. 1974 Jul;10(1):136–145. doi: 10.1128/iai.10.1.136-145.1974. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Chadwick J. S. Serological responses of insects. Fed Proc. 1967 Nov-Dec;26(6):1675–1679. [PubMed] [Google Scholar]
  5. ECHOLS H., GAREN A., GAREN S., TORRIANI A. Genetic control of repression of alkaline phosphatase in E. coli. J Mol Biol. 1961 Aug;3:425–438. doi: 10.1016/s0022-2836(61)80055-7. [DOI] [PubMed] [Google Scholar]
  6. Faye I., Pye A., Rasmuson T., Boman H. G., Boman I. A. Insect immunity. 11. Simultaneous induction of antibacterial activity and selection synthesis of some hemolymph proteins in diapausing pupae of Hyalophora cecropia and Samia cynthia. Infect Immun. 1975 Dec;12(6):1426–1438. doi: 10.1128/iai.12.6.1426-1438.1975. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Inoue K., Takamizawa A., Yano K., Amano T. Chemical studies on damages of Escherichia coli by the immune bactericidal reaction. I. Release and degradation of phospholipids from damaged bacteria. Biken J. 1974 Dec;17(4):127–134. [PubMed] [Google Scholar]
  8. Osserman E. F., Lawlor D. P. Serum and urinary lysozyme (muramidase) in monocytic and monomyelocytic leukemia. J Exp Med. 1966 Nov 1;124(5):921–952. doi: 10.1084/jem.124.5.921. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Powning R. F., Davidson W. J. Studies on insect bacteriolytic enzymes. I. Lysozyme in haemolymph of Galleria mellonella and Bombyx mori. Comp Biochem Physiol B. 1973 Jul 15;45(3):669–686. [PubMed] [Google Scholar]

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