ABSTRACT
Objective: To screen the best compatibility proportion of total alkaloids of Coptidis Rhizoma and Notoginseng Radix et Rhizoma total saponins (HS composition)by uniform design and pharmacological model and to observe the effect on diabetic complications. Method: The total alkaloids of Coptidis Rhizoma and Notoginseng Radix et Rhizoma total saponins were used as the research objects, U6(62) table was choosed for grouping design.The content of triglyceride fasting blood-glucose (FBG), prothrombin time (PT) and active partial thromboplastin time (APTT) was chosen as index. The best dose ratio was obtained by multipleregression analysis. Rats with type 2 diabetes mellitus induced by high-fat diet combined streptozotocin were divided into blank group, model group, metformin group (150 mg·kg-1), HS composition group (total alkaloids of Coptidis Rhizoma 360 mg·kg-1+ Notoginseng Radix et Rhizoma total saponins 40 mg·kg-1). Rats were administered orally for 10 weeks.By observing the blood glucose, glucose tolerance,area under the curve (AUC), triglyceride (TG), high-density lipoprotein (HDL-C)and low-density lipoprotein (LDL-C), hemorheological indexes and pathological changes of pancreas, heart, kidney and retina in rats of each group, the effect of this composition on diabetic complications was verified. Result: Combination of 625 mg·kg-1 total alkaloids of Coptidis Rhizoma and 60 mg·kg-1 Notoginseng Radix et Rhizoma total saponins was the optimal dosage ratio of HS composition.The validation test showed that compared with blank group, the fasting blood glucose and lipid levels in the model group were significantly increased (PPPPPPPPPPPConclusion: The optimum compatibility dose of HS composition have a good therapeutic effect on diabetic complication rats induced by high-fat diet and streptozotocin.
ABSTRACT
The effect of Qizhi Jiangtang vapsule (QJC) on degree of dermal ulcer cicatrization in 2 type diabetic rats was studied. Except the rats for blank group, other male Wistar rats were used to establish type 2 diabetic model by feeding with high sugar and high fat diet for four weeks and intraperitonally injecting with 30 mg•kg⁻¹ streptozotocin (STZ). After that, the rats were divided into balanced groups according to blood sugar, and received corresponding drugs for treatment for 8 weeks. At the end of week 8, 2 cm diameter circular incision was done on the back of rats. After that, the rats were administered continuously for10 days. Area of ulcer surface was detected every two days. After the last administration, wound granulation tissues were cut down to conduct pathological examination and detect the expression of VEGF, PI3K, p-ERK protein in wound tissues. The results showed that compared with the model group, after application of Qizhi Jiangtang capsule (2.24 g•kg⁻¹), the wound was significantly reduced on day 6 and day 10 of wound formation; inflammation reaction on ulcer surface was significantly reduce; Qizhi Jiangtang capsule can increase VEGF expression in the wound tissues of diabetic rats, and inhibit ERK phosphorylation. It can be concluded that Qizhi Jiangtang capsule can promote skin ulcer healing for diabetes rats, and its mechanism may be related to regulating the expression of VEGA and p-ERK proteins.
ABSTRACT
To observe the hypoglycemic effect of Qizhi Jiangtang capsule in rats with type 2 diabetes, and investigate the preliminary mechanism of its hypoglycemic effect, type 2 diabetes rat models were established by high glucose and high fat combined with small dose of streptozotocin (STZ). After continuous administration for 6 weeks, blood glucose, and glycosylated serum protein (GSP) levels were detected in all of the animals; immunohistochemistry assay was used to detect the number of islet β cells; Western blot assay was used to detect the protein expression levels of insulin receptor (InsR), phosphoinositide-3 kinases (PI3K), glucose transporter-2 (GLUT2) and phosphorylated Jun N-terminal kinases (p-JNK)in hepatic tissues. The results showed that Qizhi Jiangtang capsule could reduce the blood sugar and GSP levels in serum in animals with type 2 diabetes mellitus, increase the level of insulin in serum and number of islet β cells, increase the protein expression levels of InsR, PI3K and GLUT2, and reduce the level of p-JNK protein expression. In conclusion, Qizhi Jiangtang capsule has relatively stable hypoglycemic effect, and the mechanism may be associated with increasing the number of islet β cells and level of insulin in serum, up-regulating the protein expression levels of InsR, PI3K and GLUT2, down-regulating the level of p-JNK protein expression in hepatic tissues, and reducing the level of insulin in hepatic tissues.
ABSTRACT
To discuss the protective effect of aralosides (AS) on I/R-induced rat myocardial injury. The adult rat ventricular myocyte ischemia model was established through perfusion with sodium lactate perfusate and reperfusion with Ca(2+) -containing Tyrode's solution simulation. The cell contraction and ion concentration synchronization determination system was applied to detect the effect of AS on single I/R cell contraction and Ca2+ transients. According to the findings, AS could increase resting sarcomere length, contraction amplitude, ± dL/dt(max), calcium transient amplitude and speed of post-reperfusion myocardial cells (P < 0.05, P < 0.01), and decrease in time for achieving 90.0% of maximum relaxation, time for achieving peak value, resting calcium ratio, contraction period [Ca2+] i, time for achieving 50.0% of maximum relaxation and attenuation rate of intracellular calcium transient (P < 0.05, P < 0.01). Therefore, it is suggested that AS improved the post-reperfusion cell contraction and injury of calcium homeostasis.