Objective To investigate the effect of rosiglitazone on the expression of platelet CD40 ligand (CD40L) in insulin-resistant rats, and to further determine the relationship between CD40L and insulin resistance. Methods 60 healthy male SD rats [(200±20)g] were randomly divided into 4 groups: control group (C), high fat group (HF), low dose rosiglitazone group (LR) and high dose rosiglitazone group (HR). Rats in group C were fed normal chow diet, and the others were given high fat chow diet. After 12 weeks, high dose of rosiglitazone (10mg/kg) was given to rats in group HR and low dose of rosiglitazone (5 mg/kg) was given to rats in group LR for 4 weeks. Rats in group HF and group C were given 0.9% sodium chloride solution. The level of sCD40L was measured by ELISA and the expression of platelet membrane CD40L was detected by immunoprecipitation and Western blot. The insulin resistance (IR) index was calculated by homeostasis model assessment (HOMA). Results HOMA-IR, sCD40L level and platelet membrane CD40L expression were higer in group HF than in group C (9.8±3.2 vs. 5.9±1.7, 367.3 ±35.3 vs. 232.3±120.6, 2.1±0.4 vs. 1.4±0.2, respectively, all P<0.05). Compared with the group HF, HOMA-IR, sCD40L level and platelet membrane CD40L expression were obviously decreased in group HR(5.4±1.1, 276.9±54.0, 1.4±0.3, respectively, all P<0.05), and there were no significant differences in HOMA-IR, sCD40L level and platelet membrane CD40L expression between group HF and group LR (P>0.05). Conclusions In insulin-resistant rats, the level of sCD40L and the expression of platelet membrane CD40L were higher. After treatment with high dose of rosiglitazone, sCD40L level and platelet membrane CD40L expression were decreased with the improvement of insulin resistance.

With the development of natural products, the research activities on the solubilization methods of water-insoluble natural products have been carried out worldwide. Big molecular weight and poor solubility of most natural active ingredients lead to a very poor oral absorption and low bioavailability, which has extremely limited their development in pharmaceutical fields and clinical application. As a result, it is necessary to find out a suitable technique to improve the solubility and enhance the oral bioavailability of insoluble natural drugs. Based on the related references published in these years, this review introduced some new techniques to improve the solubility and bioavailability of natural drugs, including prodrugs, inclusion complex, solid dispersion, cocrystals, osmotic pump, liquisolid compacts, micronization, self-microemulsifying, nanosuspensions, lipsomes, polymeric micelles and so on, and summarized the theory, characteristics, application range, application examples, problems and development direction of each technique.
Administration, Oral ; Biological Availability ; Biological Products ; administration & dosage ; chemistry ; pharmacokinetics ; Chemistry, Pharmaceutical ; methods ; trends ; Solubility ; Technology, Pharmaceutical ; methods ; trends ; Water

Medicine, Chinese Traditional ; Translations ; Yin-Yang

Objective To observe changes of cognitive function and the expression of tumor necrosis factor alpha(TNF-α),interleukin 10(IL-10) in hippocampus of diabetic rats,and assess the role of inflammation in the possible pathogenesis of diabetic encephalopathy (DE).Methods 30 male SD rats were randomly divided into control group and diabetes mellitus group.After 4 weeks of feeding high fat diet,diabetes mellitus group according to 30mg/kg injected with streptozotocin to establish type 2 diabetic rat model.At the end of the experiment,cognition were evaluated using water maze test.The concentration of beta-amyloid(Aβ) in hippocampus of diabetic rats were detected through enzyme linked immunosorbent assay,and the expression of TNF-α,IL-10 were detected by Western blotting.The expression of Aβ,TNF-α,IL-10 were observed through immunohistochemistry.Results Time spent in the target quadrant in diabetes mellitus group was shorter than that in control group ((38.21± 3.68)s vs (42.10±2.62)s,t=3.105,P＜0.01).The frequency of crossing original platform site was less than that in control group((2.62±0.77) vs(3.69±0.95),t=3.184,P＜0.01).Compared with control group the expression of Aβ,TNF-α were higher(BothP＜0.01),and IL-10 were lower(P＜0.01)in diabetes mellitus group.The positive expression of Aβ,TNF-α were obviously and IL-10 were less obviously observed in diabetes mellitus group according to immunohistochemistry.Conclusion The cognitive decline in diabetic rats is possibly related to inflammatory cytokines expressing out of balance.

Objective To examine neuroinflammation,oxidative damage and neuron loss in the contralateral parie-tal lobecortex of TBI model mice, and to investigate effects of berberine chloride on such secondary damage.Methods TBI model was established by a weight-drop hitting device and mice in berberine group were administered intragastrically with berberine chloride (50mg/kg.day) for 21 days.Immunofluorescence staining was used to assess activity of microglia and astrocyte.Immunohistochemistry was used to assess DNA oxidative damage, neuron loss and expression of COX-2 and iN-OS.Results Activation of microglia and astrocyte, expressions of COX-2 and iNOS and DNA oxidative damage were ob-viously increased by TBI,(19.82 ±1.88)and(16.96 ±1.69)、(13.79 ±4.32)and(8.67 ±0.96)、(27.86 ±5.38) and (16.00 ±7.59)、(31.92 ±6.57)and(24.79 ±2.78)respectively (P<0.01 or P<0.05).Activation of microglia and ex-pressions of COX-2 and iNOS were significantly suppressed by berberine ,(15.49 ±1.88)and(19.82 ±1.88)、(16.83 ± 7.89)and(27.86 ±5.38)、(26.25 ±2.41)and(31.92 ±6.57) respectively(P<0.01 or P<0.05).There was no differ-ence in neuron loss among three groups, (49.05 ±4.38),(48.56 ±3.56)and (47.75 ±4.14) respectively (P>0.05). Conclusions TBI can cause neuroinflammation and oxidative damage but not neuron loss in the contralateral parietal lobe cortex.Berberine chloride can significantly suppress neuroinflammtion in the contralateral parietal lobe cortex after TBI.

Objective To evaluate the efficacy of DSA-guided percutaneous transhepatic gallbladder catheter drainage (PTGCD) in treating aged patients with acute cholecystitis complicated by severe diseases. Methods The clinical data of 15 aged patients with acute cholecystitis or complicated by severe diseases, who were encountered at authors’ hospital in the past three years and were treated with PTGCD, were retrospectively analyzed. The clinical results were discussed. Results PTGCD was successfully accomplished with single procedure in all 15 patients. Abdominal pain was relieved within one to three days, and the abdominal symptoms and signs subsided or disappeared. Reexamination of routine blood test showed that the white blood cell count decreased to normal range in 1 - 2 weeks, and complete cure was achieved in some patients. Secondary surgery was carried out in some patients after the clinical condition was improved. During the follow-up period no complications occurred in all patients except one who developed biliary leakage after the catheter was retrieved two weeks after the treatment. Conclusion For the treatment of complicated acute cholecystitis in aged patients who are not suitable to receive surgery, DSA-guided percutaneous transhepatic gallbladder catheter drainage is an ideal therapeutic means as it can significantly relieve clinical symptoms.

In this article, a new application model has been given for digital signing technology used in the Electronic Medical Record system, which uses digital signature to implement authentication mechanism and doctor signing, and uses a notarial digital signature server to implement the third party's digital signature for notarial mechanism. It can prevent the others from modifying the doctor's record and prevent the doctor himself from modifying the record as well. Case history database preserves signed data to ensure the authenticity and validity, in law, of the Electronic Medical Record.
Computer Security ; Medical Records Systems, Computerized ; Programming Languages ; Software

Objective To investigate the relationship between glucose excursion and cognitive function in aged type 2 diabetes. Methods A total of 248 aged type 2 diabetes were recruited in this study,all of them wore continuous glucose monitoring system (CGMS) for 3 d to evaluate the glucose excursion including mean amplitude of glycemic excursions (MAGE) which was used for assessing intra-day glycemia variability,and mean daily difference (MODD) which represented day-to-day glycemic variability.During the period of CGMS monitoring,all subjects accepted mini mental status examination (MMSE) for evaluating cognitive function.The relationships of MAGE and MODD with performance on cognitive tests were assessed. Results The over intra-day glucose excursion group had lower MMSE score than the narrow intra-day glucose excursion group[(24.25±6.75)vs.(25.97±0.47),P=0.025].The MMSE score was decreased in over day-to-day glucose excursion group compared with the narrow day-to-day glucose excursion group [(24.21 ± 6.47) vs. (26.01 ± 5.49),P =0.019]. A statistically significant association was observed between MAGE and the score of MMSE(r=- 0.308,P＜0.001),and between MODD and MMSE(r=-0.226,P =0.001).Conclusions Glucose excursion may affect cognitive function in aged type 2 diabetes.The over glucose excursion decreases the score of MMSE.

Objective To investigate the genotype distribution of extended-spectrum?-lactamases(ESBLs) and AmpC?-lacta- mases produced by Escherichia coli and Klebsiella pneumoniae in 10 teaching hospitals of China.Methods 90 clinical strains of E.coli and 61 strains of K.pneumoniae isolated in 2003 and confirmed to produce ESBLs were collected from 10 teaching hos- pitals in China.Analytical isoelectric focusing was used to measure the pI of the?-lactamases.Conjugation experiment was used to study the transfer of cefoxitin resistance.Plasmid-mediated AmpC enzyme genes were amplified and sequenced by multiplex polymerase chain reaction (MPCR).Results The prevalence of ESBL-producing E.coli and K.pneumoniae was about 50% in Wuhan,Nanjing and Jinan.The prevalence of ESBL-producing E.coli was lower than K.pneumoniae in Beijing.However,in other hospitals the prevalence of ESBL-producing E.coli was a little higher than K.pneumoniae.About 24.4% of ESBL-pro- ducing E.coli isolates and 19.4% of ESBL-producing K.pneumoniae isolates were resistant to cefoxitin.Cefoxitin-resistant i solate was identified in all hospitals except Shenyang.Major genotype of ESBL-producing isolates was CTX-M.The CTX-M-9 group was the most common group,followed by CTX-M-1.More K.pneumoniae isolates produced both ESBLs and AmpC en- zyme than E.coli.The genotype was CTX-M/DHA-1.The PCR results of 3 transconjugants producing both ESBLs and AmpC enzyme were the same as their donor isolates.Conclusions The genotype of ESBL-producing isolates is mainly CTX-M-9 group in these teaching hospitals.More K.pneumoniae isolates produced both ESBLs and AmpC enzyme than E.coli.Most of these isolates are due to geno type CTX-M/DHA-1,which can spread through plasmid.

Objective To explore the effects and mechanisms of prenatal hypoxia on vasomotor functions of fetal rats.Methods Sixteen pregnant Sprague-Dawley rats were randomly divided into two groups:control and hypoxia groups (eight in each group).Rats in the hypoxia group were provided with 10.5％ of oxygen from gestation day 5 to 21,while those in the control group were exposed to normoxic condition.Fetuses were removed from the pregnant rats by cesarean section on gestational day 21.Fetal body weight,blood gas and electrolyte levels were measured.Thoracic aorta rings were separated from fetal rats and used in different vascular function tests.Effects of hypoxia during pregnancy on angiotensin Ⅱ (Ang Ⅱ)-mediated vasoconstrictions and acetylcholine (Ach)-mediated vasodilatations in fetal thoracic aortas were measured.Changes in vasomotor functions were observed after both endothelial nitric oxide synthase (eNOS) inhibitor NG-nitro-L-arginine methyl ester (L-Name) and L-type calcium channel (LTCC) inhibitor nifedipine were administered.T-test and two-way analysis of variance were used for statistical analysis.Results (1) Compared with the control group,fetal body weight [(4.40±0.23) vs (3.33±0.42) g,t=2.871],blood partial pressure of oxygen [(50.64±2.17) vs (42.50-±-2.32) mmHg (1 mmHg=0.133 kPa),t=-2.618] and blood oxygen saturation [(58.95±1.97)％ vs (47.73±2.24)％,t=3.564] in the hypoxia group were significantly reduced (all P＜0.05).(2) Compared with the control group,Ang Ⅱ-mediated vasoconstrictions increased,but Ach-mediated vasodilatations in fetal thoracic aortas decreased in the hypoxia group (both P＜0.05).L Name induced stronger Ang Ⅱ-mediated contractions in thoracic aortas in the control group than that in the hypoxia group (P＜0.05).However,nifedipine decreased Ang Ⅱ-induced contractions,especially in the hypoxia group (P＜0.05).Conclusions Maternal hypoxia during pregnancy not only affects the growth and development of fetuses but also changes their blood vessel functions,which may be related to the change of LTCC and the impairment of eNOS.