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Effect of pyridoxine on rifampicin toxicity
Abstract:
The effects of pyridoxine (PN) on rifampicin (RMF) toxicity were investigated by both in vivo and in vitro methods. RMF (30 mg/kg) was injected intraperitoneally and PN(150 mg/kg) was administered orally to rats for 10 consecutive days. After treatment, clinical chemistry and hematologic profiles were measured. RMF and PN plus RMF did not show any adverse effects at this in vivo experimental condition. Thymidine incorporations of mice bone marrow cells were examined in vitro. RMF showed a decrease in thymidine uptake in a dose-dependent manner, but PN showed a reversal of the thymidine uptake suppression caused by RMF (p < 0.01). On the other hand, PN showed a decrease in thymidine uptake at a high concentration level.
Insights
Pyridoxine (PN) mitigated rifampicin (RMF) toxicity in vitro by reversing RMF-induced suppression of thymidine uptake in bone marrow cells. However, high PN concentrations alone also reduced thymidine uptake.
Area of Science:
- Pharmacology
- Toxicology
- Biochemistry
Background:
- Rifampicin (RMF) is a crucial antibiotic, but its potential toxicity requires investigation.
- Pyridoxine (PN), or vitamin B6, is essential for cellular metabolism.
- Understanding the interaction between RMF and PN is important for patient safety.
Purpose of the Study:
- To investigate the effects of pyridoxine (PN) on rifampicin (RMF) toxicity.
- To evaluate the in vivo and in vitro impact of PN on RMF-induced adverse effects.
Main Methods:
- In vivo studies involved oral administration of PN and intraperitoneal injection of RMF to rats for 10 days.
- Clinical chemistry and hematologic profiles were assessed post-treatment.
- In vitro studies examined thymidine incorporation in mouse bone marrow cells.
Main Results:
- In vivo, neither RMF nor PN+RMF showed adverse effects in rats under the experimental conditions.
- In vitro, RMF dose-dependently decreased thymidine uptake.
- PN reversed RMF-induced suppression of thymidine uptake (p < 0.01), but high PN concentrations alone decreased uptake.
Conclusions:
- Pyridoxine may counteract certain in vitro toxic effects of rifampicin on bone marrow cell proliferation.
- Further research is needed to clarify the dose-dependent effects of PN on cellular metabolism and its clinical implications in conjunction with RMF therapy.