Showing papers by "Surender Singh published in 2017"

Anti-inflammatory and anti-arthritic activity of aqueous extract of Rosa centifolia in experimental rat models.

Abstract: Aim The present study was carried out to evaluate the anti-inflammatory and antiarthritic activity of Rosa centifolia aqueous extract (RC) in a carrageenan-induced paw edema model and complete Freund's adjuvant (CFA)-induced arthritis. Methods Anti-inflammatory activity of RC was evaluated using the carrageenan-induced paw edema model in rats. Arthritis was induced in rats by sub-plantar administration of CFA. Joint size was measured at regular intervals by using a micrometer screw gauge. Serum and ankle joints of rats immunized with CFA were collected and subjected to enzyme-linked immunosorbent assay for estimation of tumor necrosis factor (TNF)-α level and dot blot for secretory cytokines interleukin (IL)-1β and IL-6. An acute and 28-day oral toxicity study was carried out to evaluate the safety of the test drug. Results Pre-treatment with RC produced a dose-dependent reduction in carrageenan-induced paw edema and CFA-induced arthritis models and was effective as indomethacin. RC also inhibited the delayed increase in joint diameter as seen in control and indomethacin-treated animals in CFA-induced arthritis. The expression of proinflammatory mediators TNF-α, IL-6 and IL-1β was also found to be less in the RC-treated group as compared to controls. Conclusion Based on these results, it was suggested that Rosa centifolia could be considered as a potential anti-inflammatory and anti-arthritic agent.

miR-505-5p and miR-193b-3p: potential biomarkers of imatinib response in patients with chronic myeloid leukemia.

Abstract: The introduction of imatinib has led to remarkable improvement in overall survival of the patients with chronic myeloid leukemia (CML). Despite its success, around 20–25% of the patients do not ach...

Safety studies of homoeopathic drugs in acute, sub-acute and chronic toxicity in rats

Abstract: Background: Homoeopathic drugs are frequently recommended in day to day life as therapeutic agents by homoeopathic practitioners. However, safety of homoeopathic drugs remains a challenge because of the high variability of chemical components involved. Aim: The objective of the present study was to investigate the acute, subacute, and chronic oral toxicity of different homoeopathic drugs (Ferrum phosphoricum 3X, Ferrum phosphoricum 6X, Calcarea phosphoricum 6X, and Magnesium phosphoricum 6X) in experimental models. Materials and Methods: In acute oral toxicity study, homoeopathic drugs were administered orally at 2000mg/kg body weight, and animals were observed for toxic symptoms till 10 days as per the OECD guidelines. For subacute and chronic toxicity study, homoeopathic drugs were administered for 28 and 180 days, respectively, as per the OECD guidelines. At the end of 28 and 180 days, the animals were sacrificed and toxicity parameters were assessed. Histopathological evaluation of different organs was also performed to assess any toxicity. Results: In acute toxicity study, no mortality was found at a dose of 2000 mg/kg which indicates that oral LD50of homoeopathic drugs were more than 2000 mg/kg. The administration of drugs at a dose of 70 mg/kg body weight for 28 and 180 days did not produce any significant change in haematological and biochemical parameters of male and female rats as compared to normal control group. No pathological changes were observed in histology of various organs of treated rats as compared to normal control animals. Conclusion: These homoeopathic drugs are safe & produce no toxicity when administered for longer duration.