Ultrastructure of globule leucocyte inclusions in the rat and mouse

Summary The fine structure of the globules in globule leucocytes of rat and mouse infected with various parasites has been studied. Best preservation was obtained with glutaraldehyde and subsequent osmium fixation. It is concluded that the structure of the globules is host specific. In rat, the structure is not parasite specific, but in mouse slight differences in the structure of the globules of the globule leucocyte in different experimental conditions suggest a small change in the packing of the sub-units.The authors are grateful to Professor G. M. Wyburn and Mr. R. N. C. Aitken for research facilities and advice. The work was partially financed by Agricultural Research Council Grant No. AG 17/49.     

Exploring how viruses enhance plants' resilience to drought and the limits to this form of viral payback

This article comments on: Virulence determines beneficial trade‐offs in the response of virus‐infected plants to drought via induction of salicylic acid     

Chronopharmacology and Therapeutic Drug Regulations: Commentary

A quiet, little-publicized development has taken place in the biomedical sciences in recent years. The new terms chronobiology, chronopharmacology, chronopharma-codynamics, chronopharmacokineties, and even chronotoxicology very gently have entered our language and our science. Chronobiologic considerations have been proved to increase or decrease therapeutic drug effectiveness or modify their toxicology. Many authors have pointed out that cues to these advantages or disadvantages may be obtained from animal studies that show that normal changes of cellular rhythms take place at prescribed intervals for many biologic parameters. We are observing replacement of the traditional unidimensional reference intervals by timing drug administration most effectively according to the rhythms having phase, frequency, and amplitude. Oncologists have utilized these concepts most successfully to increase the therapeutic effectiveness and decrease toxicity of antineoplastic agents. In addition, asthma has received great attention as a circadian rhythm-related disorder; angina and myocardial infarction, hypertension, peptic ulcer, and epilepsy are other disease conditions that have been treated successfully by understanding how biological rhythms influence diagnosis and therapy.