Swarupanjali Padhi*, Rupa Mazumder and Shradha Bisth Pages 1088 - 1092 ( 5 )
Background: In case of meningitis, the meninges are inflamed and the blood brain barrier is distorted, therefore, there is no hindrance to drug penetration. The problem arises when the disease is at the verge of cure, the meninges become uninflamed and the permeability of the drug is reduced to such extend that it becomes nearly impossible to maintain the minimum inhibitory concentration of drug at the site of infection. This problem was overcome by formulating ceftriaxone loaded NLCs and administrating it through intraperitoneal route to Wistar Albino rat. For quantitative assessment of drugs in rat serum and cerebrospinal spinal fluid, a new RP-UFLC (reverse-phase ultra-fast liquid chromatography) method has been developed and validated.Objective: Development and validation of RP-UFLC (using ion-pairing reagent) method for accurate estimation of ceftriaxone in rat serum and CSF. Methods: Method validation is done according to the ICH Guidelines (Q2) for the estimation of ceftriaxone in rat serum and its CSF (cerebrospinal fluid) by the RP-UFLC method. The blood was collected from the rat tail vein and CSF was collected carefully from cisterna magna of the rats by a 23G syringe. The mobile phase was used in a ratio of 70:30%v/v of phosphate buffer with ion-pairing reagent and acetonitrile with a pH of 8.0 Results: Limit of detection and limit of quantification of ceftriaxone in rat serum was 1.08 μg/ml and 3.84 μg/ml, respectively. Similarly, the limit of detection and limit of quantification of ceftriaxone in CSF of rats was 0.94 μg/ml and 2.84 μg/ml, respectively. In both cases, the R2 value was more than 0.99 and showed 99% accuracy. Conclusion: The experimental results suggest that the new RP-UFLC method developed and validated can be effectively used to assess ceftriaxone in preclinical studies in rats.
Ion-pairing reagent, limit of detection, limit of quantification, recovery data.
Noida Institute of Engineering and Technology (Pharmacy Institute) Greater Noida, Gautam Buddha Nagar, Uttar Pradesh 201306, Noida Institute of Engineering and Technology (Pharmacy Institute) Greater Noida, Gautam Buddha Nagar, Uttar Pradesh 201306, Department of Pharmacy, Sardar Bhagwan Singh, Post Graduate Institute of Biomedical Science & Research, Balawala, Dehradun, Uttarakhand 248161