The antimicrobial activity of luteolin against four bacteria in vitro / 中国兽医学报

Broth microdilution method was hired to measure the minimum inhibitory concentrations (MICs) of luteolin against Trueperella pyogenes,Escherichia coli,Salmonella and Streptococcus in order to evaluate the antimicrobial activity of luteolin in vitro.Meanwhile,the bacteria growth curves in medium containing sub-inhibitory concentration of luteolin were measured in this test.The results indicated that Tureperella pyogenes was the most sensitive to luteolin with a MIC of 0.078 g/L than that of these strains;and Salmonella was also sensitive to luteolin (MIC:1.25 g/L).However,The inhibitory effect of luteolin on Escherichia coli and Streptococcus is relatively weak,and shared the same MIC with 2.5 g/L.Luteolin showed inhibitory effects on the growth curves of all the strains in this test at sub-inhibitory concentration,and the inhibitory effects on the growth curves increased with the concentration of luteolin(P＜0.05).

Antibacterial and antioxidant properties of various solvents extracts of Abutilon theophrasti Medic. leaves

This paper described the extraction procedure of six extracts from Abutilon theophrasti Medic. leaves and evaluated antioxidant and antibacterial activity of different extracts by hydroxyl radical, DPPH radical scavenging, broth micro-dilution and agar-well diffusion methods. The six extracts were prepared by the two extraction procedures: [I] water was the extraction solvent; [II] 90% alcohol extract was extracted by petroleum ether, chloroform, ethyl acetate and n-butanol in turn. Extract yields were 7.34%, 7.31%, 0.45%, 0.12%, 2.70% and 5.68% for extract I to VI. It was revealed that the various extracts had effective antibacterial activity against four test strains from Staphylococcus aureus [ATCC 25923], Streptococcus [ATCC 49619], Escherichia coli [ATCC 25922] and Salmonella [ATCC 01303]; meanwhile, the six extracts demonstrated potent antioxidant activity, achieved by hydroxyl radical and DPPH radical scavenging assay. Minimum inhibitory concentrations [MICs] for the bacterial species ranged from 2.21 to 539.46 mg/ml, diameter of inhibition zone ranged from 2.08 to 15.05mm. The scavenging ·OH and DPPH· rates were 62.37% to 81.86% with the concentration 0.06 to 1.89mg/ml and 37.80% to 81.23% with the concentration 1.07 to 35.52mg/ml. According to the results, these extracts have antioxidant and antibacterial activity. In view of all the facts collectively, the six extracts will become natural and nontoxic antioxidant and antibacterial agent, and be applied in food and pharmaceutical industries for the prevention or treatment caused by microorganisms and free radicals

Clinical observation on effects of Qingjiefang on early diabetic nephropathy and insulin resistance / 国际中医中药杂志

Objective To observe the effects of Qingjiefang on insulin resistance and reduction of microalbuminuria in early diabetic nephropathy.Methods A total of 64 patients with early diabetic nephropathy were randomly recruited into a control group and a treatment group.The control group(32 cases)was treated with conventional western medicine,while the treatment group(32 cases)was treated with Qingjiefang based on the control group.The changes of the fasting plasma glucose(FPG),2hBG,glycosylated hemoglobin(HbAlC),fasting Insulin(FINS),24 hours urinary albumin excretion rate (UAER).body mass index(BMI)and insulin resistance(IR)were observed before and after the treatment.Results After the treatment,FINS,IR and UAER were decreased in the treatment group,the comparison with the control group showed significant difference (P<0.05).Conclusion Qingjiefang can effectively improve insulin resistance and prevent early diabetic nephropathy.

Relation of Phlegm-dampness Constitution and Insulin Resistance in the First-degree Non-diabetic Relatives of Patients with type 2 Diabetes / 国际中医中药杂志

Objective Observe the relation of phlegm-dampness constitution and insulin resistance in first-degree non-diabetic relatives of patients with type 2 diabetes.Methods Collected first-degree relatives without mabetes of patients with type 2 diabetic patients 87 cases.Among these 87 cases,39 cases were phlegm-dampness constitution and 48 were not.Fasting plasma glucose(FPG)and fasting insulin(FINS)were measured,and insulin resistance index(IR)was calculated.Results There were significant differences between the two groups in FINS and IR(P＜0.05)..Conclusion The IR of the First-degree non-diabetic relatives with phlegm-dampness constitution of patients with type 2 diabetes have greater insulin resistance than the First-degree non-diabetic relatives with non-phlegm-dampness constitution of patients with type 2 diabetes.

The Relationship between Diabetes with Blood Stasis Syndrome and High-Sensitive C-Reactive Protein and HbA1c / 中国中医药信息杂志

Objective To study the level of serum high-sensitive C-reactive protein and HbA1c in diabetes patients with blood stasis syndrome,and to investigate the relationship among them.Methods 58 cases of diabetes patients with blood stasis syndrome and 65 cases without blood stasis syndrome were observed.The level of FPG,hsCRP,HbA1c,24 h UAER,TC,TG,HDL-C and LDL-C were estimated.Results The level of FPG,LDL-C,TG,HbA1c,hsCRP of diabetes with blood stasis syndrome were higher than the control group(P 0.05).In patients with blood stasis syndrome,the hsCRP was positively correlated to HbA1c,24 h UAER,BMI,LDL-C,TC,TG,but the multifactor regression analysis indicated that hsCRP was only correlated to the HbA1c independently.Conclusions The long-term hyperglycemia and inflammatory may be one of the reasons for the formation of blood stasis syndrome of diabetes patients,hsCRP and HbA1c may be new evidences for diagnosis of diabetes patients with blood stasis syndrome.