Antinociceptive Investigations of Niranthin in Complete Freund's Adjuvant-induced Chronic Pain in Mice.

The main objectives of the present work are to determine the clinical effect of niranthin on visceral or somatic inflammatory pain. The study was performed to determine the effects of niranthin on visceral or somatic inflammatory hypersensitivity of adult Swiss albino mice by using complete Freund's adjuvant (CFA) induced pain model. The effect of CFA injection was determined after 24 hours of injection by using an aesthesiometer such as Von Frey filaments to evaluate tactile acetone-evoked cooling and thermal sensitivity. We used a digital Plethysmometer to measure paw edema. Single dose of niranthin intraperitoneal injection (5 & 10 mg/kg) was injected into mice having CFA-induced mechanical hypersensitivity and after 30 minutes of administration, reduced mechanical hypersensitivity was observed. In addition, niranthin also reduced acetone-evoked hypersensitivity within 4 hours. Compared to DMSO, niranthin was most highly active to reduce CFA-induced paw edema. To reduce mechanical hypersensitivity, multiple doses of niranthin (bis in die (b.i.d.)) from 1st - 5th day and b.i.d. day 9th and 10th) were given and remarkable results were observed such as did not cause tolerance in multiple dosing and significantly reduced in CFA induced hypersensitivity. This work reported niranthin having antinociceptive activity and indicated that niranthin is conventionally active in the management of persistent pain.

Optimization and validation of RP-HPLC method for simultaneous estimation of palbociclib and letrozole.

A simple, rapid, and robust RP-HPLC method have been developed and validated to measure palbociclib (PB) and letrozole (LT) at single wavelength (254 nm). A isocratic elution of samples performed on Intersil C8 (4.6 mm × 250 mm particle size 5 µm) column with mobile phase consisting 0.02 M sodium dihydrogen phosphate buffer (pH 5.5): acetonitrile: methanol (80:10:10 v/v/v) delivered at flow rate 1.0 mL min-1. A good linear response was achieved over the range of 5-50 µg mL-1. The LODs for PB and LT were found to be 0.098 and 0.0821 µg mL-1, while the LOQs for PB and LT were 0.381-0.315 µg mL-1, respectively. The method was quantitatively evaluated in terms of system suitability test, linearity, precision, accuracy (recovery) and robustness as per standard guidelines. The method is simple, convenient and suitable for the analysis of PB and LT in bulk drug.

Development and validation of a high performance thin layer chromatographic method for determination of 1, 8-Cineole in Callistemon Citrinus.

A new, simple, precise, rapid, and selective high performance thin layer chromatographic (HPTLC) method has been developed and validated for the estimation of 1, 8-cineole in volatile oil of leaves of Callistemon Citrinus obtained by hydro distillation. The method was validated as per ICH guidelines and can be utilized for routine analysis. The retention factor for 1, 8-cineole was found to be 0.52. The linearity was found to be in the range of 3 µg-12 µg. The recovery obtained for 1, 8-cineole was 98%, which is satisfactory. The result obtained in validation indicate the accuracy, reproducibility, and reliability of the developed HPTLC method for determination of 1, 8-cineole.

Hepatoprotective activity of hydroalcoholic extract of leaves of Alocasia indica (Linn.).

Oral administration of hydroalcoholic extract of A. indica (250 and 500 mg/kg) effectively inhibited CCl4 and paracetamol induced changes in the serum marker enzymes, cholesterol, serum protein and albumin in a dose-dependent manner as compared to the normal and the standard drug silymarin-treated groups. Hepatic steatosis, fatty infiltration, hydropic degeneration and necrosis observed in CCl4 and paracetamol-treated groups were completely absent in histology of the liver sections of the animals treated with the extracts. The results suggests that the hydroalcoholic extract of leaves of A. indica possess significant potential as hepatoprotective agent.