Lamium album or Urtica dioica? Which is more effective in decreasing serum glucose, lipid and hepatic enzymes in streptozotocin induced diabetic rats: A comparative study

Objectives: Diabetes mellitus, the most common endocrine disorder, is defined by hyperglycaemia.  Urtica dioica or stinging nettle is known to have antidiabetic effects. Lamium album or non stinging nettle is shown to have some beneficial effects such as antioxidant, and cytoprotective properties. The purpose of this study was to compare the effects of hydroalchoholic extract of L. album and U. dioica on serum  glucose, lipids and hepatic enzymes level in sterptozotocin induced diabetic rats.Methods: Thirty-two male Wistar rats were randomly assigned into four groups; normal control,  diabetic control, diabetic treated with U. dioica (100 mg/kg/daily), diabetic treated with L. album (100 mg/kg/daily) for 28 days. Serum glucose, cholesterol, triglyceride (TG), alanin trasaminase (ALT), alkaline phosphatase (ALP) and aspartate transaminase (AST) were measured.Results: U. dioica and L. album extracts caused significant decrease (p<0.05) in serum glucose level in diabetic rats. Compared to diabetic control, both extracts significantly decreased serum cholesterol, ALT, AST and ALP (p<0.05). The level of serum TG in diabetic rats treated with U. dioica was significantly lower than that of animals treated with L. album (p<0.05).Conclusion: it seems that administration of U. dioica and L. album extracts in diabetic rats may have similar lowering effects on the level of serum glucose, cholesterol and hepatic enzymes, albeit U. dioica might be more effective in improving serum TG as compared with L. album.Key words: Diabetes, Glucose, Lamium album, Lipids, Rats, Urtica dioic

Association of serum α-tocopherol, retinol and ascorbic acid with the risk of cataract development

Objective: Several studies on cataract have suggested that antioxidant micronutrients such as α-tocopherol, retinol and ascorbic acid may help to protect against cataractogenesis. Our objective was to determine the serum concentration of these antioxidant vitamins in subjects with cataract to see if there is any correlation between the levels of essential vitamins and the development of cataract. Methods: The study was performed on a total of 88 patients and healthy controls who were given physical examinations that included a complete eye examination. Ascorbic acid was measured in serum with UV/Vis spectrophotometry, and fat-soluble vitamins were measured in serum by high-performance liquid chromatography according to previously published methods. Results: The mean serum concentration of α-tocopherol in patients (9.16 ± 2.53.μg/ml) with cataract was lower than in the control group (p < 0.001). Patients had a moderately lower ascorbic acid concentration than the control group, which was not statistically significant. The subjects' serum retinol levels were similar to control group levels and not statistically significant. Conclusion: While this is a small-scale case study it can nonetheless be viewed as presenting support to help narrow the possibility that antioxidative agents may play a role in delaying cataract formation. Copyright © 2008 S. Karger AG

Preliminary study on the effect of nucleolin specific aptamer�miRNA let-7d chimera on Janus kinase-2 expression level and activity in gastric cancer (MKN-45) cells

Recently, much attention has been focused on the use of miRNAs in cancer treatment. The role of proto-oncogene Janus kinase-2 (JAK-2) in proliferation and survival of gastric cancer has been previously documented. The aim of this study was to evaluate the effect of a chimera consisted of nucleolin specific aptamer (NCL-Apt) and miRNA let-7d on JAK2 expression level and activity in gastric cancer cells. NCL-Apt�miRNA let-7d chimera was prepared by two methods. Gastric cancer (MKN-45) cell line and control cell line of human dermal fibroblast (HDF) were treated with the chimera and the changes in JAK2 expression and activity were determined using real-time PCR and ELISA techniques, respectively. In MKN-45 cells, the chimera caused significant decrease in JAK2 expression level and activity compared to the aptamer alone and miRNA mimic negative control. Nevertheless, transfected miRNA let-7d showed remarkable reduction in the expression level of JAK2 in comparison with control state in both MKN-45 and HDF, confirmed unspecific effect of let-7d on normal and cancerous cells. With regard to the synergic effect of this chimera on JAK2 activity, it might be viewed as a therapeutic candidate in gastric cancer. However, further studies are warranted to prove it. © 2018, Springer Nature B.V