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Lymphocyte-Salmonella interaction: energy dependence and thiol group involvement
Biochemical and Biophysical Research Communications
|May 29, 1986
Summary
Lymphocyte-Salmonella interactions depend on cellular energy and thiol groups. ATP enhances binding, while uncouplers and thiol inhibitors decrease it, revealing key mechanisms in this immune cell-bacterium relationship.
Area of Science:
- Immunology
- Microbiology
- Cell Biology
Background:
- Lymphocyte-Salmonella interactions are crucial for immune responses.
- Understanding the molecular mechanisms of bacterial adherence to host cells is vital.
Purpose of the Study:
- To investigate the energy dependence of lymphocyte-Salmonella binding.
- To determine the involvement of thiol groups in lymphocyte-Salmonella adherence.
Main Methods:
- Modified rosette test was employed to quantify binding.
- Experiments involved manipulating cellular energy levels (ATP, uncouplers, inhibitors).
- Thiol-specific reagents (mersalyl, N-ethyl-maleimide) were used to assess thiol group involvement.
Main Results:
- Externally added ATP significantly enhanced binding frequency and bacterial counts per lymphocyte.
- Uncouplers and electron transfer chain inhibitors reduced lymphocyte-Salmonella adherence.
- Treatment with thiol reagents abrogated adherence, indicating thiol groups are essential on both lymphocytes and Salmonella.
- Mersalyl inhibition led to a decrease in bacteria-binding sites per lymphocyte.
Conclusions:
- Lymphocyte-Salmonella adherence is an energy-dependent process.
- Thiol groups on both lymphocytes and Salmonella are critical for the binding mechanism.
- The findings provide insights into the molecular basis of host-pathogen interactions.