Related Experiment Videos
Decreased cerebrospinal fluid cyclic adenosine 3',5'-monophosphate in bacterial meningitis
Abstract:
The concentration of cyclic adenosine 3',5'-monophosphate (cAMP) in 16 cerebrospinal fluid samples from eight patients with bacterial meningitis due to several different organisms was determined. An age- and sex-matched control group of 12 patients with a variety of acute, noninfectious systemic and neurological diseases was also examined. To quantitate the amount of cAMP, a new, improved radioimmunoassay was used with the ability to measure 2.5 X 10(-15) mol of cAMP. The mean concentration of cAMP in the cerebrospinal fluid from patients with meningitis was 0.05 nM, and from patients in the control group it was 1.18 nM. The difference between these two values is statistically significant. The decreased cAMP concentration in the cerebrospinal fluid from patients with bacterial meningitis did not seem to be secondary to metabolism by bacteria or leukocytes, increased enzymatic degradation within the cerebrospinal fluid, or an artifact introduced by the collection and storage procedure. Since the concentration of cAMP in the cerebrospinal fluid is normally found to be within narrow limits and probably reflects intracellular cAMP levels, the results described in this study suggest that interference with cAMP metabolism in central nervous system tissue occurs in bacterial meningitis. This finding seems to be independent of the causative organism and might explain the pathogenesis of selected, neurological manifestations of this disease.
Insights
Cerebrospinal fluid cyclic adenosine 3
Area of Science:
- Neuroscience
- Biochemistry
- Infectious Diseases
Background:
- Bacterial meningitis can lead to neurological complications.
- Cyclic adenosine 3',5'-monophosphate (cAMP) is a crucial second messenger in cellular processes.
- Understanding cAMP's role in meningitis is vital for explaining disease pathogenesis.
Purpose of the Study:
- To investigate the concentration of cAMP in cerebrospinal fluid (CSF) of bacterial meningitis patients.
- To compare CSF cAMP levels in meningitis patients with a control group.
- To explore potential reasons for altered cAMP levels in bacterial meningitis.
Main Methods:
- Radioimmunoassay (RIA) was employed to quantify cAMP levels in CSF samples.
- CSF samples were collected from 16 bacterial meningitis patients and 12 controls.
- Statistical analysis was performed to compare cAMP concentrations between groups.
Main Results:
- Mean CSF cAMP concentration was significantly lower in bacterial meningitis patients (0.05 nM) compared to controls (1.18 nM).
- Decreased cAMP levels were not attributed to bacterial metabolism, leukocyte activity, enzymatic degradation, or sample handling.
- CSF cAMP levels in meningitis patients were consistently lower than in controls.
Conclusions:
- Bacterial meningitis is associated with significantly reduced cAMP levels in cerebrospinal fluid.
- This reduction suggests interference with cAMP metabolism within the central nervous system tissue.
- Altered cAMP metabolism may contribute to the neurological manifestations observed in bacterial meningitis.