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Cerebrospinal fluid protein profile in experimental pneumococcal meningitis and its alteration by ampicillin and
J L Kadurugamuwa1, B Hengstler, O Zak
1Pharmaceutical Research Laboratories, Ciba-Geigy Limited, Basel, Switzerland.
Abstract:
We studied the effects of ampicillin and anti-inflammatory agents on cerebrospinal fluid (CSF) protein patterns in rabbits with meningitis caused by Streptococcus pneumoniae. CSF proteins were analyzed in the acute phase of infection and during convalescence by using sodium dodecyl sulfate-polyacrylamide gel electrophoresis, followed by two types of staining or by immunoblotting. During the acute phase a massive influx of serum albumin into the CSF was accompanied by the appearance of other proteins of high and low molecular weight. In untreated animals and animals given ampicillin alone or together with indomethacin, the abnormal pattern persisted for up to 30 d. Combined treatment with ampicillin and dexamethasone or oxindanac, a new nonsteroidal anti-inflammatory drug, partially prevented the alterations in CSF protein patterns. Reversion to normal CSF protein patterns was fastest in these two groups.
Insights
Ampicillin and anti-inflammatory drugs impact cerebrospinal fluid (CSF) protein patterns during Streptococcus pneumoniae meningitis in rabbits. Certain anti-inflammatory agents, combined with ampicillin, accelerated the normalization of CSF protein profiles.
Area of Science:
- Neuroscience
- Infectious Diseases
- Pharmacology
Background:
- Bacterial meningitis, particularly Streptococcus pneumoniae infections, causes significant alterations in cerebrospinal fluid (CSF) protein composition.
- Understanding these protein changes is crucial for diagnosing and managing meningitis.
- The role of anti-inflammatory agents in modulating CSF protein profiles during meningitis requires further investigation.
Purpose of the Study:
- To investigate the effects of ampicillin and various anti-inflammatory agents on CSF protein patterns in rabbits with Streptococcus pneumoniae meningitis.
- To evaluate the impact of combined antibiotic and anti-inflammatory treatment on the recovery of normal CSF protein profiles.
Main Methods:
- Cerebrospinal fluid (CSF) protein patterns were analyzed in rabbits infected with Streptococcus pneumoniae.
- Techniques used included sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) with staining and immunoblotting.
- Protein analysis was performed during the acute phase of infection and convalescence.
Main Results:
- A massive influx of serum albumin and other proteins into the CSF was observed during the acute phase of meningitis.
- In untreated and ampicillin-alone treated rabbits, abnormal CSF protein patterns persisted for up to 30 days.
- Combined treatment with ampicillin and dexamethasone or oxindanac partially prevented CSF protein alterations, with faster reversion to normal patterns.
Conclusions:
- Combined ampicillin and specific anti-inflammatory therapy (dexamethasone or oxindanac) can mitigate CSF protein alterations in bacterial meningitis.
- These findings suggest a potential therapeutic benefit of combining antibiotics with certain anti-inflammatory drugs to restore CSF homeostasis during meningitis.
- Further research may elucidate the precise mechanisms by which these agents influence CSF protein dynamics.