Objective To study the effects of a new phosphodiesterase inhibitor MS23 on the myogenic responses of diabetic rat coronary artery (RCA) and the myocyte potassium currents via the voltage-gated potassium channels (Kv).Methods Rats were rendered diabetic with a peritoneal injection of streptozocin at 60 mg · kg-1.At the 4th week after treatment,the diabetic rats were randomly divided into model group,low-dose,and high-dose groups of MS23 (0.3 mg · kg-1 and 1.0 mg · kg-1 orally administrated once a day for 8 weeks),while the normal rats were set as the control group.Model group and control group were fed with 0.9％ NaCl of equal volume once a day from the fourth week to the twelfth week.A wire myograph was used to observe the myogenic effects of isolated RCA.The Kv currents of single rat coronary arterial smooth muscle cell (RCASMC) were studied with patch clamp.Results After administration,the maximum vasorelaxations of RCA to acetylcholine in control group,model group,low-dose,high-dose group were (74.45 ± 6.30) ％,(56.84 ± 5.51) ％,(77.52 ± 5.27) ％,(86.33 ± 8.88) ％,respectively.The maximum vasorelaxations to sodium nitroprusside in the four groups were (88.50 ± 5.81)％,(56.65 ±8.62)％,(80.50 ±7.85)％,(91.60 ±5.97)％,respectively.The maximum RCASMC Kv current density in the four groups were (53.69±4.02) pA · pF-1,(28.25±3.69) pA · pF-1,(38.78±4.55) pA · pF-1,(63.35 ± 4.57) pA · pF-1,respectively.There were significant differences between the model group and the blank group/low-dose group/high-dose group (P ＜ 0.05).The maximum vasorelaxations of diabetic RCA to MS23 (30 μmol · L-1) was (70.69 ± 12.72)％,and preincubation with Kv inhibitor 4-AP (3 mmol · L-1) reduced the MS23-induced maximum relaxation to (34.47 ± 10.08) ％,with significant difference (P ＜ 0.05).Conclusion MS23 relaxes diabetic rat coronary artery and enhances diabetic RCASMC Kv currents.

OBJECTIVETo investigate the effects of the cadmium chloride on the DNA damage and the expression of the gadd153 and gadd45beta promoter and mRNA in HepG2 cells.

METHODSDNA damage induced by cadmium chloride was detected by comet assay. The plasmids (pGADD153-Luc and pG45-Luc) containing DNA damage and repair inducible gene 153 and 45 (gadd153 and gadd45beta) promoter and luciferase and gadd45beta reporter gene were constructed. The activity of gadd153 and gadd45beta promoter were represented by the luciferase activity, the inducible luciferase activities was detected by bioluminescence. The expression of gadd153 and gadd45beta mRNA was detected by RT-PCR.

RESULTSThe results of comet assay indicated that Olive Tail Moment induced by the cadmium chloride increased significantly at the dose of 100, 300 micromol/L, compared with the control (P < 0.05). The luciferase activity analysis showed that the expression levels of gadd153 promoter increased significantly in 1, 5, 10 micromol/L treatment group, compared with the control (P < 0.05). The expression levels of gadd45beta promoter in 5, 10 micromol/L treatment group were significantly higher than that in control group (P < 0.05). The expression levels of gadd153 mRNA induced by cadmium chloride at the doses of 1, 5, 10 micromol/L and the expression levels of gadd45beta mRNA induced at the doses of 5, 10 micromol/L were significantly higher than thoae in control group (P < 0.05).

CONCLUSIONThe cadmium chloride can induce the DNA damage and increase the expression levels of the gadd153 and gadd45beta promoters in HepG2 cells.

Antigens, Differentiation ; genetics ; Cadmium Chloride ; toxicity ; Comet Assay ; DNA Damage ; drug effects ; Genes, Reporter ; Hep G2 Cells ; Humans ; Plasmids ; Promoter Regions, Genetic ; RNA, Messenger ; genetics ; Transcription Factor CHOP ; genetics

【Objective】 To compare the maternal and neonatal outcomes of pre-and post-conceptional laparoscopic transabdominal cervical cerclage(LTCC) in women diagnosed with cervical insufficiency. 【Methods】 A retrospective study was done on 225 patients who underwent LTCC in the First Affiliated Hospital, Sun Yat-sen University between January 2018 and December 2018. 138 women in the preconceptional group and the other 87 in the postconceptional group. Maternal and neonatal outcomes of these two groups were compared. Multivariable logistic regression analysis was performed to explore the impact of LTCC on preterm delivery. 【Results】 Compared with the postconceptional group, the preconceptional group showed a significantly decreased rate of preterm labor(15.0% vs. 27.6%, P = 0.036), a significantly prolonged gestational week at delivery [(37.4 ± 1.7) wks vs.(36.8 ± 2.0) wks, P = 0.041] and a significantly increased second trimesters fetal loss rate(15.9% vs. 4.6%, P = 0.010). No significant difference was found in the risk of maternal complication and adverse neonatal outcomes between the two groups. Multivariable logistic regression analysis revealed that postconceptional LTCC correlated with premature labor(P = 0.042), with 2.08 for odds ratio(OR) value and 1.02 ~ 4.22 for 95% CI. 【Conclusion】 LTCC, especially preconceptional LTCC, is more successful in improving obstetric outcomes by preventing preterm labor of patients with cervical insufficiency.

OBJECTIVEUsing two antithrombotic treatment (clopidogrel vs. clopidogrel combined warfarin) strategies after femoral-popliteal artery angioplasty prospectively, to evaluate which strategy is more effective for the restenosis prevention.

METHODSTotally 50 patients referred for endovascular treatment (including the percutaneous transluminal angioplasty (PTA) and stent implantation) of the superficial femoral artery and popliteal artery from January 2008 to May 2009 were randomly divided into clopidogrel group (group A, 25 cases, 30 limbs) and clopidogrel plus warfarin group (group B, 25 cases, 33 limbs) before operation. Clinical outcomes and restenosis rate of the target lesions were evaluated at 3, 6 and 12 months after operation.

RESULTSTotally 88 patients were screened for participation in the study, 56 patients were included after the follow-up of 12 months. At 3 months, the rates of restenosis were 16.7% in group A and 18.2% in group B (χ² = 0.025, P = 0.874). At 6 months, the accumulated restenosis rates were 36.7% in group A and 36.4% in group B (χ² = 0.001, P = 0.98). At 12 months, the accumulated restenosis rates were 53.3% in group A and 42.4% in group B (χ² = 0.75, P = 0.387). Analysis for the critical limb ischemia sub-group showed that follow-up of 12 months, the accumulated restenosis rate was 8/10 in group A and 6/12 in group B (χ² = 1.023, P = 0.312).

CONCLUSIONThe clopidogrel alone treatment for PTA or PTA plus stent implantation of femoral popliteal artery has no statistically significant difference in comparison with the clopidogrel combined warfarin treatment in terms of the cumulative vascular restenosis rate at 3, 6, 12 months postoperatively.

Adult ; Aged ; Aged, 80 and over ; Angioplasty, Balloon ; Arterial Occlusive Diseases ; etiology ; prevention & control ; Female ; Femoral Artery ; surgery ; Humans ; Male ; Middle Aged ; Popliteal Artery ; surgery ; Postoperative Complications ; prevention & control ; Prospective Studies ; Ticlopidine ; analogs & derivatives ; therapeutic use ; Warfarin ; therapeutic use

OBJECTIVETo evaluate the effect of FLAMIGEL (hydrogel dressing) on the repair of residual burn wound.

METHODSSixty burn patients with residual wounds hospitalized in 6 burn units from November 2011 to May 2012 were enrolled in the multi-center, randomized, and self-control clinical trial. Two residual wounds of each patient were divided into groups T (treated with FLAMIGEL) and C (treated with iodophor gauze) according to the random number table. On post treatment day (PTD) 7 and 14, wound healing rate was calculated, with the number of completely healed wound counted. The degree of pain patient felt during dressing change was evaluated using the visual analogue scale (VAS). The mean numbers of wounds with score equal to zero, more than zero and less than or equal to 3, more than 3 and less than or equal to 6, more than 6 and less than or equal to 10 were recorded respectively. Wound secretion or exudate samples were collected for bacterial culture, and the side effect was observed. Data were processed with repeated measure analysis of variance, t test, chi-square test, and nonparametric rank sum test.

RESULTSWound healing rate of groups T, C on PTD 7 was respectively (67 ± 24)%, (45 ± 25)%, and it was respectively (92 ± 16)%, (72 ± 23)% on PTD 14. There was statistically significant difference in wound healing rate on PTD 7, 14 between group T and group C (F = 32.388, P < 0.01). Ten wounds in group T and four wounds in group C were healed completely on PTD 7, with no significant difference between them (χ(2) = 0, P > 0.05). Forty-two wounds in group T and seven wounds in group C healed completely on PTD 14, with statistically significant difference between them (χ(2) = 42.254, P < 0.01). Patients in group T felt mild pain during dressing change for 37 wounds, with VAS score higher than zero and lower than or equal to 3. Evident pain was observed in patients of group C during dressing change for 43 wounds, and it scored higher than 3 and less than or equal to 6 by VAS evaluation. There was statistically significant difference in mean number of wounds with different grade of VAS score between group T and group C (Z = -4.638, P < 0.01). Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae, E. coli, Baumanii, and Staphylococcus epidermidis were all detected in both groups, but there was no statistical difference between group T and group C (χ(2) = 0.051, P > 0.05). No side effect was observed in either of the two groups during the whole trial.

CONCLUSIONSFLAMIGEL can accelerate the healing of residual burn wounds and obviously relieve painful sensation during dressing change.

Adolescent ; Adult ; Aged ; Bandages ; Burns ; therapy ; Female ; Humans ; Hydrogels ; Male ; Middle Aged ; Young Adult

OBJECTIVE: To study the effects of aerobic exercise combined with chlorella pyrenoidos of disintegrated cell wall on the lipid metabolism in rats with high-fat diet. METHODS: Fifty-five male Wistar rats were subjected to adaptive feeding for 4 days and weight-free swimming training for 3 days, 20 min/d. After eliminating 5 rats that were not suitable for swimming training, the other rats were randomly divided into 5 groups according to their body weight:control group (C group), high fat diet group (H group), high-fat diet + chlorella group(HC group), high fat diet + aerobic exercise group (HM group), high fat diet + chlorella + aerobic exercise group (HMC group), 10 in each group. The HM and HMC group were subjected to 60 min/d swimming training for 6 weeks with non-weight-bearing. Group C were fed regular diet. The other groups were fed with high-fat diet, the rats in group HC and HMC were intragastrically treated with chlorella pyrenoidos of disintegrated cell wall at the dose of 3.9 g/(kg·d), the volume was 5 ml/kg, and the other groups are given equivalent saline. The Lee's index and biochemical indexes of blood and liver were measured after 6 weeks. RESULTS: Compared with group C, Lee's index, serum levels of free fatty acids(FFA), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), total cholesterol (TC), triglyceride (TG), low density lipoprotein cholesterol (LDL-c), liver FFA and interleukin-10 (IL-10) were increased significantly (<0.01), the serum level of high-density lipoprotein cholesterol (HDL-c) was decreased significantly (<0.01) in group H. Compared with group H, Lee's index, serum FFA, IL-6, TNF-α, TC, TG, LDL-c, liver FFA and IL-10 were decreased significantly (<0.05 or <0.01), serum level of HDL-c was increased significantly (<0.05 or <0.01) in group HC, HM and HMC. Compared with group HC and HM, Lee's index, serum FFA, IL-6, TNF-α, TC, TG, LDL-c, liver FFA and IL-10 were decreased significantly (<0.05), serum level of HDL-c was increased significantly (<0.05) in group HMC. CONCLUSIONS Aerobic exercise and chlorella pyrenoidos of disintegrated cell wall can improve lipid metabolism in rats with high-fat diet and reduce the lipid toxicity caused by obesity. Joint intervention is more effective than single intervention.
Animals ; Cell Wall ; Chlorella ; Diet, High-Fat ; Lipid Metabolism ; Male ; Physical Conditioning, Animal ; Rats ; Rats, Wistar

Objective: To investigate the mid-and long-term clinical effects of tricuspid valvuloplasty with the implantation of an artificial plastic ring. Methods: Data of 677 patients who had functional tricuspid regurgitation and left cardiac valve disease and underwent tricuspid valvuloplasty and left cardiac valve surgery were retrospectively. Among these patients, 353 underwent simple suture annuloplasty (group A) while the rest 324 patients underwent artificial plastic ring annuloplasty (group B). The two-year and more-than-two-year clinical and ultrasonocardiograph (UCG) follow-up data of the two groups were obtained and compared. Results: A total of 600 patients (88.6%) completed the long-term follow-up (more than two years). The two-year follow-up showed no significant difference in the incidence of mild tricuspid regurgitation between the two groups (82.2% vs. 92.7%, P=0.37). However, there were significantly more cases that developed into moderate to severe tricuspid regurgitation in group A than in group B (17.8% vs. 7.3%, P=0.031). The long-term follow-up revealed that the recurrence rate of tricuspid regurgitation in group B was significantly lower than that in group A (11.0% vs. 25.0%, P=0.029), and the ratio of cases developing into moderate to severe tricuspid regurgitation in group A was significantly higher than that in group B (28.9% vs. 9.9%, P=0.007). The comparison between the two intra-group time segments showed that the development of tricuspid regurgitation in group A was significantly increased (28.9% vs. 17.8%, P=0.022), but in group B it was relatively stable (9.9% vs. 7.3%, P=0.52). Conclusions: Artificial ring annuloplasty is associated with significantly less tricuspid regurgitation than simple suture annuloplasty.