This study was aimed to compare and investigate protective effects of metformin and rosiglitazone on cardiac dysfunction in experimental diabetic cardiomyopathy (DC) model rats. The experimental DC rat model was induced by feeding high calorie diet plus single intraperitoneal injection of small dosage of streptozotocin (STZ). Then, intragastric administration of metformin (140 mg·kg-1) or rosiglitazone(2 mg·kg-1) was given to DC rats for consecutive 6 weeks. Parameters of general signs, eating amount, blood sugar, blood lipids, heart function, heart structure and lipometabolism of myocardial tissues were measured. The results showed that both metformin and rosiglitazone can obviously improve the myocardial injury of DC model rats and reduce the CK value (P < 0.01). Metformin can obviously increase the cardiac output of DC model rats (P < 0.01). Rosiglitazone can improve the maximum rate of myocardial contraction and diastole of the model rat's left ventricle (P < 0.05). Both metformin and rosiglitazone can decrease interventricular septal thickness (IST) value (P < 0.01). Metformin can obviously im-prove general signs of DC rats, inhibit body weight loss and reduce water intake (P < 0.05). Metformin can obvi-ously reduce the blood sugar level (FBG, GSP, HbA1c and FMN) of DC rats (P < 0.05, or P < 0.01) as well as the concentration of TG (P < 0.01). Rosiglitazone can reduce the concentration of FBG and HbA1c (P < 0.05). Meanwhile, rosiglitazone can significantly reduce the concentration of TG and LDL as well as obviously increase the myocardial FA-β-oxidase (P < 0.05). It was concluded that both metformin and rosiglitazone can recover the cardiac dysfunction and myocardial injury of DC rats on certain level. Metformin showed more effects on eating amount and body weight improvements of DC rats.

Objective To compare the torque resistance effect with different types of reconstruction of the distal radioulnar joint (DRUJ) dislocation,in order to explore biomechanical basis for clinical practice.Methods Six adult cadaver forearm were used,including 4 males and 2 females.The average death age was 64.9 years (range,36-78 years).Three were right side,3 were left side.The DRUJ dislocation model was made after the standardized resection of the palmar and dorsal DRUJ ligament.Clinic reconstruction methods of the DRUJ include trans-bone tunnel renconstruction (intra-articular reconstruction) and Looptie up reconstruction (extra-articular reconstruction).The mechanical properties as follows:torque velocity:5°/min,maximum torque angulation:90°,maximum torsion force:1 N· mm.Each limb was detected for the torque mechanic under four conditions:normal,DRUJ dislocation,intra-articular reconstruction and extra-articular reconstruction.Results Each limb was inspected for intact mechanic baseline and without the visual damage to the bone.The average pronation torque resistance on normal condition was (0.44±0.10) N·mm,(0.37±0.09) N·mm on DRUJ dislocation group,(0.45±0.09) N-mm on intra-articular reconstruction group,and (0.42±0.09) N·nun on extra-articular reconstruction group.Pronation torque resistance of DRUJ dislocation group was apparently lower than the normal group (t=2.043,P=-0.047).The pronation torque resistance reconstruction group had no significant difference with normal group.The average supination torque resistance on normal condition was (0.56±0.16) N·mm,while on DRUJ dislocation group was (0.42±0.11) N-mm,on intra-articular reconstruction group was (0.54±0.16) N·mm,on extra-articular reconstruction group was (0.51±0.13) N·mm.There were no apparent differences among four groups.Conclusion Both internal and external reconstruction could recover the rotation stability and normalize the torque resistance,without statistical difference.

ObjectiveTo evaluate the curative effect of reconstruction of the hand and foot defects with bones and tendons exposure using free medial sural artery perforator flap(MSAP). MethodsRadiographs of 2 cadavers injected with a modified lead oxide-gelatin mixture were digitally analyzed. Between April 2007 and December 2010, thirty-four patients with soft tissue defects in the distal limb were treated with the free MSAP flap transplantation. The sizes of the defect ranged 6 cm × 4 cm-13 cm × 8 cm, and the flaps ranged 7 cm× 5 cm-14 cm × 9 cm. These clinical cases included 25 hands and 9 feet, all of them with bones and tendons exposure.In these defects,twenty-two were clean,twelve got infections.In our cases, twenty-three flaps were nourished with single perforator vessel and else 11 with two;perforator vessel fifteen flaps were dissected one superficial vein to anastomose with that of the recipient sites in addition to accompanying vein anastomosis;The sensation of 9 flaps recovered the hands were reconstructed with cutaneous nerve anastomosis. ResultsA partition of the calf skin blood vessels,and three-dimensional reconstruction image of the sural artery were obtained.All flaps survived,five of them appeared partially violet and bubbles. Followed up 6-21 months, the cosmetic results were satisfactory and without apparent bulkiness.The flap colors were similar to recipient sites. The flap senses reconstructed with neural anastomosis recover to S2-S3. ConclusionThe new flap is very suitable to repair the soft tissue defect in the distal limbs,because the fairly constant perforator vessel,the reliable blood supply and the cosmetic shape of the MSAP flap are all advantages of it in addition to no damage to low leg chief artery and gastrocnemius.

Objective To assess whether propofol call induce stable psychic dependence in the rats by self-administration experiment. Methods Twenty-four male SD rats 14 weeks old weighing 240一270 mg were studied. Anesthesia was performed with intraperitoneal injection of 3%sodium pentoharbitsl 40 ms/kg and atropine 03 mg/kg.A catheter wag inserted into the right external jugular vein. Penicillin(100 000 U)0.2 ml wag injected through the external jugular vein for anti-infection and heparin sodium(50U/ml)0.1 ml for anticoagulation. The self-administration experiment of 14 days was started after the 7 days of recovery. All the rats were randomly divided into 4 groups(n=6 each):contontrol group(C),propofol 0.56 mg/kg/l group(P1),propofol 1.00 mg/kg group(P2)and pmpofol 1.70 ms/kg group(P3).The experimental events were controlled by a computer with 50 times of the maximum injection per day.The times ofactive and inactive nose-poke response and times of drug iniection were recorded per day.Results Compared with group C and P1,the times of active nosepoke response and injections were significantly increased in group P2 and P3(P<0.01).The times of active nosepoke response and injections per day were significantly increased in group P3 than in group P2(P(0.01).There was no significant difference in the times of active nose-poke response and injections between group C and P1.There was no significant difference in inactive nose-poke resporme between the 4 groups.And the total daily doses of propofol injected in the last 3 days were significantly increased in a dose-dependent manner.Conclusion Propefol can induce the development of psychological dependence in rata and it is related to the dosage.

China ; Humans ; Streptococcus pneumoniae

OBJECTIVE: To explore the pharmacologically active ingredients in granules (TJQW) for treatment of coronavirus disease 2019 (COVID-19) in light of systemic pharmacology. METHODS: We performed database search, literature mining and drug-like index screening to identify the bioactive components in TJQW, the positive drugs for disease treatment and their therapeutic targets. The core disease target was investigated based on the cross-linking interaction of the bioactive components, positive drug and potential disease target, and the target proteins at the key nodes were analyzed by GO and KEGG analyses. Based on the therapeutic targets for COVID-19, virtual screening was conducted to screen the compounds in TJQW and construct the network cross-linking the key bioactive molecules in TJQW, key node targets of the disease, and the related biological pathways. RESULTS: We identified 159 compounds in TJQW and obtained 18 core proteins based on the cross-linking of the bioactive components, positive drugs and disease targets. The key node targets consisted of 22 targets including the latest 4 COVID-19 proteins. Virtual screening results showed that at least 14 compounds could bind with the core disease target proteins. The material basis of TJQW for COVID-19 treatment was explained in multi-pathway, multi-component and multi-target perspectives. In terms of the structural characteristics of the compounds, we screened the top 30 molecules with strong binding with the target proteins, among which flavonoids were the predominant components. CONCLUSIONS This investigation reveals the therapeutic mechanism of TJQW for COVID-19 involving multiple components, targets and pathways from the perspective of key bioactive molecules, disease key node targets and related biological pathways. We screened 30 active precursors from TJQW, which provides reference for the clinical application and further development of TJQW.
Betacoronavirus ; Coronavirus Infections ; drug therapy ; Drugs, Chinese Herbal ; Humans ; Medicine, Chinese Traditional ; Pandemics ; Pneumonia, Viral ; drug therapy