ABSTRACT
Gelam honey was reported to exhibit anti-oxidative, anti-tumour and anti-inflammatory properties against many types of cancer. The main aim of the present study was to evaluate the effect of Gelam honey on the oxidative stress level of human lung cancer cells. IC50 of Gelam honey was identified by treating A549 cells with different doses of honey (50-200 mg/ml). The cells were divided into four groups and induced with stress using hydrogen peroxide (H2O2) accordingly: control, H2O2, Gelam honey, H2O2 + Gelam honey. After 24 hrs of treatment, oxidative stress markers such as malondialdehyde (MDA) and protein carbonyl, were determined. Induction of oxidative stress significantly increased the levels of MDA (p<0.05) but had no effect on protein carbonyl levels. Treatment with Gelam honey was found to reduce MDA levels (p<0.05) in A549 cells exposed to H2O2 but had no effect on the level of protein carbonyl. Interestingly, Gelam honey treatment alone had no effects on the levels of MDA and protein carbonyl. In conclusion, Gelam honey reduces lipid peroxidation but not protein oxidation in human lung cancer cells subjected to oxidative stress.
ABSTRACT
Field experiments were conducted at Sivapuri, Chidambaram, Tamil Nadu to evaluate the efficacy of vermicompost, in comparison to inorganic fertilizers–NPK, on the physio-chemical and biological characteristics of the soils – clay loam soil (CLS) and sandy loam soil (SLS) and on the growth, yield and nutrient content of beans – Phaseolus vulgaris. Results showed that the application of vermicompost @ 5 tonnes ha-1 had enhanced significantly the pore space (1.09 and 1.02 times), water holding capacity (1.1 and 1.3 times), cation exchange capacity (1.2 and 1.2 times). It reduced particles (1.2 and 1.2 times), and bulk density (1.2 and 1.2 times), pH (1 and 1.02 times) and electrical conductivity (1.4 and 1.2 times) and increased organic carbon (37 and 47 times), micro (Ca 3.07 and 1.9 times, Mg 1.6 and 1.6 times, Na 2.4 and 3.8 times, Fe 7 and 7.6 times, Mn 8.2 and 10.6 times, Zn 50 and 52 times and Cu 14 and 22 times) and macro (N 1.6 and 1.7 times, P 1.5 and 1.7 times, K 1.5 and 1.4 times) nutrients and microbial activity (1.4 and 1.5 times) in both soil types, particularly more in CLS. The growth, yield (1.6 times) and quality (protein (1.05 times) and sugar (1.01 times) content in seed) of bean were enhanced in CLS than SLS. On the other hand, the application of inorganic fertilizers @ 20:80:40 kg ha-1 has resulted in reduced porosity (1.03 and 1.01 times), organic carbon (1.04 and 9.5 times) and microbial activity (1.02 and 1.03 times) in both soil types.