Related Experiment Videos
Mechanical agitation of very dilute antiserum against IgE has no effect on basophil staining properties
J H Ovelgönne1, A W Bol, W C Hop
1Department of Molecular Cell Biology, State University of Utrecht, The Netherlands.
Insights
This study investigated the effects of agitated dilutions of antiserum against IgE on human basophils. Researchers found no significant difference between agitated and non-agitated dilutions, questioning previous findings on extreme dilutions.
Area of Science:
- Immunology
- Cell Biology
- Biochemistry
Background:
- Previous research suggested that mechanically agitated dilutions of antiserum against immunoglobulin E (anti-IgE) exhibit unique biological effects.
- The loss of metachromatic staining properties in human basophil leukocytes was proposed as a model to study these effects.
Purpose of the Study:
- To investigate the reported effect of mechanically agitated dilutions of anti-IgE.
- To determine if physical agitation influences the biological activity of extreme dilutions of anti-IgE.
Main Methods:
- Conducted 24 blind experiments using human basophil leukocytes.
- Assessed the number of toluidine blue-stainable basophils after incubation with vortexed or non-vortexed dilutions of anti-IgE.
- Utilized tenfold serial dilutions of anti-IgE ranging from 10(21) to 10(30).
Main Results:
- No discernible difference in effect was observed between strongly agitated and minimally agitated dilutions of anti-IgE.
- The study failed to demonstrate any effect of extreme dilutions of anti-IgE under the experimental conditions used.
- Results indicated a lack of reproducibility of the previously reported effect.
Conclusions:
- The previously reported effect of extreme dilutions of anti-IgE requires further investigation and clarification.
- Reproducibility of results across different experimenters is crucial for validating such findings.
- The current study did not find evidence supporting the purported effects of agitated extreme dilutions of anti-IgE.
Abstract:
A previously reported effect of mechanically agitated dilutions of antiserum raised against IgE was investigated using the loss of metachromatic staining properties of human basophil leukocytes as a model. A series of 24 blind experiments was performed in which we determined the number of toluidine blue-stainable basophils after incubating with vortexed or non-vortexed dilutions of anti-IgE. Tenfold serial dilutions were used, in the range 10(21) to 10(30) (6.6 x 10(-26) to 6.6 x 10(-35) M anti-IgE). We found no evidence for a different effect of strongly agitated dilutions, compared to dilutions made with minimal physical agitation. In fact, in our hands no effect of extreme dilutions was shown at all. We conclude that the effect of extreme dilutions of anti-IgE, reported by Davenas et al., needs further clarification and that in this process the reproducibility of results between experimenters should be carefully determined.