Aim To explore the characteristic of NO-cGMP signal pathway in the regulation of thoracic aortic relaxation in thyroxine-induced hypertensive rats.Methods Hyperthyroidism was induced by administering Lthyroxine(T4,0.5 mg?kg~-1,sc)daily for 16 days.Sham-treated euthyroid control rats received only vehicle saline for 16 days.SNAP,an NO donor,was used to define the differential relaxation in the thoracic aorta from euthyroid and hyperthyroid rats.To determine the mechanisms involved changes in NO-cGMP signal pathway in the regulation of aortic relaxation from hyperthyroid rats,BAY 41-2272(BAY)was used to activate soluble guanylate cyclase(sGC),ODQ was used to inhibit sGC,and 8-Br-cGMP was used to acti vate protein kinase G(PKG),respectively.Results Thyroid hormone excess for 16 days showed characteristic changes in body weight,heart rate and systolic blood pressure in rats.The body weight was significantly decreased,while heart rate,pulse pressure and systolic blood pressure were increased in T4-treated rats.SNAP caused relaxation in the aorta in both euthyroid and hyperthyroid rats.However,SNAP-induced aortic relaxation was significantly attennuated in hyperthyroid rats than in euthyroid rats.In the presence of ODQ,SNAP-induced aortic relaxation was blocked in both euthyroid and hyperthyroid rats.BAY and 8-BrcGMP-induced aortic relaxation was significantly attennuated in hyperthyroid rats than in euthyroid rats.Conclusion These data suggest that the attenuated effect of NO-cGMP signal pathway is involved in the regulation of aortic relaxation in the pathophysiology of hyperthyroidism,which may be related to the downregulation of sGC and PKG functions.

Objective To establish abdominal aortic dissection model in ApoE-/-mice, and to evaluate the ability of 7.0T MR to detect the abdominal aortic artery aneurysms in ApoE-/-mice in vivo. Methods ApoE-/-mice aged 10 months were infused with angiotensin Ⅱ with 14 days Osmotic minipump after 10 weeks of high lipid diet. Two different doses of angiotensin Ⅱ were given to mice, i.e. 1000 ng/(kg·min) and 500 ng/(kg·min), respectively. The contrast group was infused with saline water. The abdominal aortic artery was observed in vivo with MR before and within 14 days infusion. At last, the pathological changes of the abdominal artery were compared with MRI findings. Results After 6 or 7 days higher dose of angiotensin Ⅱ infusion, aortic dissection was seen. MR T2WI showed crescent-shaped high signal in the vessel wall of one side，the pathological study identified the hematoma between media and adventitia. Abdominal aortic dissection aneurysms were also found in the mice 13 or 14 days after lower dose of angiotensin Ⅱ infusion, which were consistent with pathological studies. Besides, the signal of the vessel wall was significantly higher in both T2WI and PDWI sequences. There was excellent agreement between MR and histopathology. 〖WTHZ〗 Conclusion Abdominal aortic dissection aneurysms model can be successfully established with different doses (1000 ng/(kg·min) and 500 ng/(kg·min)) of angiotensin Ⅱ infusion into ApoE-/-mice fed with high lipid diet. High-resolution MR is able to visualize the abdominal aortic dissection aneurysm formation in vivo.

OBJECTIVETo observe the change of Th immunological gene in renal transplant recipients after the treatment of cyclosporine (CsA) and tacrolimus (FK506).

METHODSThe peripheral blood lymphacytes just before and 24 hours after CsA and FK506 treatment were isolated. The total RNA of them were reverse-transcripted and examined by real-time quantity PCR array. The results were analyzed by bioinformatic methods.

RESULTSThe TLR4, CEBPB, IL4R, IL1R1,IL18R1,and IL1R2 genes were remarkably upregulated, whereas IL-2, CCL5, CD27, CCR5, CCR4, CD4, RPL13A, TGFB3, CD86, CCR3, STAT1, NFATC2IP, IL23A, IL15, IRF4, and TFCP2 were downregulated 24 hours after CsA treatment. The IL18, IL7, PTPRC, TNFSF4, SPP1, GFI1, TLR4, IL13RA1, TNF, INHBA, LAG3, IL13, IL1R1, SOCS5, IL10, YY1, TBX21, FASLG, IL18R1, and IL1R2 genes were remarkably upregulated, whereas IL-2, IL-3, IL-4, IL-6,CCR5, CD4, CD27, CD40LG, IL15, CCR3, CD86, CCR4, and IRF4 were obviously downregulated 24 hours after FK506 treatment.

CONCLUSIONCsA and FK506 exert their therapeutic effectiveness by regulating the expressions of a series of target genes.

Cyclosporine ; pharmacology ; Cytokines ; genetics ; metabolism ; Gene Expression Regulation ; Humans ; Kidney ; drug effects ; metabolism ; Kidney Transplantation ; Oligonucleotide Array Sequence Analysis ; T-Lymphocytes, Helper-Inducer ; drug effects ; metabolism ; Tacrolimus ; pharmacology

Background and purpose:Previous studies have suggested Na+-Ca2+ exchanger isoform 1 (NCX1) as a key component of calcium homeostasis was involved in the tumorigenesis. However, the role of NCX1 and calcium signal in tumorigenesis of hepatocellular carcinoma (HCC) has not been explored. This study aimed to investigate the effect of NCX1 on cell proliferation and migration of HCC HepG2 cells in vitro and the possible mechanism.Methods:Both the real-time fluorescent quantitative polymerase chain reaction (RTFQ-PCR) and Western blot were applied to assess the expression of NCX1 mRNA and protein in normal hepatic cells (LO2), HCC cell line (HepG2), human normal hepatic tissues and hepatocellular carcinoma tissues. The change of intracellular calcium signal in LO2 and HepG2 cells via acti-vated NCX1 channel in the presence or absence of Na+ was examined by a confocal laser scanning microscope. The effects of NCX1 special inhibitor KB-R7943 on cell proliferation and migration of HepG2 cells were measured by MTT and cellscratch test.Results:Both mRNA and protein expression of NCX1 were higher in HCC tissues and cell line HepG2 than in the normal tissues and cell line LO2 (P<0.05). The activation of NCX1 channel induced a slight rise in cytoplasmic Ca2+concentration ([Ca2+]cyt) in normal cells, but caused a marked increase in cancer cells. And the NCX1 activation induced intracellular calcium increase was significantly reversed by NCX1 inhibitor KB-R7943 (P<0.05). Both NCX1-mediated proliferation and migration of HepG2 were also significantly attenuated by the KB-R7943 (P<0.05).Conclusion:NCX1 is up-regulated in HCC cells and tissues. The activation of NCX1 mediates intracellular calcium homeostasis. The inhibition of NCX1 activity can suppress the proliferation and migration of HepG2 cells. It is suggested that NCX1 may be involved in the development and progression of HCC.

0.05).The 2 -year and 3-year survival rates were 91.7 %,89.2 % and 85.8%,86.1% in all patients for either gr oup. The 2 -year and 3-year survival rates were 84.2%,81.8% and 72.9%,77.1% in p atients with positive axillary lymph nodes for the two groups, with the differen ces insignificant (Logrank test P=0.663, P=0.9 19).There were no differences in the 2-year and 3-year survivals for patients with stage Ⅲ and over receiving ch est wall irradiation or not and patients who received different doses of chest w all irradiation (Logrank test P=0.449, P=0.764 ). Conclusions Locoregional recu rrence is not reduced and survival rate is not improved by chest wall irradiatio n in this study. The prognostic impact of chest wall irradiation and the optimal target of radiotherapy remains to be substantiated by more randomized trials.

ObjectiveTo investigate the necessary of letting the intelligent knee joint be adaptive to the road terrain and the key technology of knee moment control method. MethodsBased on data from gait analysis and the dynamic model of lower limb,the knee moments while people walking on the path of different terrain were obtained. Terrain identification method was based on the features of electromyography(EMG) signals of the thigh,and the EMG of some muscles was detected. The methods were applied to an intelligent trans-femoral prosthesis developed for tests in the laboratory.ResultsConsiderable variation of the knee moments appeared when people walking on the path of different terrain,as well as that of the features of EMG of some muscles.ConclusionIt is necessary to make the intelligent knee joint be adaptive to the road terrain,and it is possible to be achieved with satisfied motion of the leg and the trajectory of ankle joint by the intelligent transfemoral prosthesis being studied which can identify the features of EMG signals.

Hemorrhoids ; Humans ; Male ; Mucous Membrane

In this study, we use pot experiment to evaluate the effect of plant growth regulator on plant morphology and biomass allocation of Salvia miltiorrhiza. Different concentrations of uniconazole were supplied to S. miltioohiza by means of foliar spray. Height, breadth and stem diameter were measured dynamically, the biomass of leaf, stem, flower and fruit, root biomass and biomass ratio were also examined at the harvest time. Owing to the treatment, plant morphology showed significant changes, the height had been greatly reduced and the breadth decreased largely. Meanwhile, the biomass allocation changed too. The biomass ratio of leaf and stem had been notably reduced while the biomass ratio of root had been increased remarkably. It appears that foliar application of uniconazole during vigorous growth period in S. miltioohiza has dramatic effect on dwarfing plant and improving resistant to lodging. This measure could also be applied to condensed cultivation of S. miltioohiza to increase production.
Biomass ; Plant Growth Regulators ; pharmacology ; Plant Leaves ; drug effects ; growth & development ; Plant Roots ; drug effects ; growth & development ; Plant Stems ; drug effects ; growth & development ; Salvia miltiorrhiza ; drug effects ; growth & development ; Triazoles ; pharmacology

Objective To summarize the ultrasonic characteristics of urinary calculus in infants who had history of feeding melamine contaminated milk powder.Methods A total of 163 children[aged(19.4?10.9)months] with urolithiasis,who had feeding melamine contaminated milk powder,were retrospectively analyzed using ultrasonography.Twenty children [aged(16.7?9.9)months] with urolit-hiasis,who had no feeding history of melamine contaminated milk powder,were chosen as controls.Ultrasonic characteristics were compared between the 2 groups.Results For melamine calculus cases,sporadic spot or hyperechic mass with different size and shape in the collecting system,partly without acoustic shadow,was found in 65 cases;dense echo and luminous belt with obscured acoustic shadow under a band without echo was found in 48 ureteral calculus cases;irregular strong echo mass or small spot with thick acoustic shadows without side lobe artifact in the dark liquid areas was found in 8 cases with bladder calculus.There was significant difference in morphology of the calculus(P0.05).Conclusions The unique ultrasonic characteristics in infants with melamine calculus had become a very useful tool to diagnose the pediatric urinary melamine calculus.J Appl Clin Pediatr,2009,24(1):67-69

OBJECTIVETo observe the risk factor stratification and prevalence of target organ damage in hypertensive patients before therapy and blood pressure control rate after 4 or 12 weeks antihypertensive drug therapy.

METHODSIn this prospective survey, data on cardiovascular risk factors, target organ damage and concomitant disease were collected in 26 655 hypertensive patients. Among them 26 325 and 3457 patients were recruited for antihypertensive drug therapy for 4 and 12 weeks, respectively and blood pressure control rate was determined.

RESULTSThe sedentary lifestyle, smoking, high body mass index, dyslipidemia were found in 52.5%, 34.4%, 31.8%, 24.5%, and microproteinuria, left ventricular hypertrophy, coronary artery disease and diabetes in 21.0%, 23.6%, 20.1%, 26.7% hypertensive patients, respectively. The average systolic and diastolic pressures were 158 +/- 14 mm Hg and 94 +/- 11 mm Hg and 3.2%, 22.2%, 21.1% and 53.3% patients were defined as low, medium, high and very high risk patients in risk stratification to quantify prognosis. There were 77.2%, 20.4% and 2.4% systolic and diastolic, isolated systolic and isolated diastolic hypertensive patients respectively. The goal blood pressure control rate was 50.2% and 56.7% respectively after 4 and 12 weeks antihypertensive drug therapy. The control rate in patients complicated with diabetes and renal disease was significantly lower than patients without them and systolic pressure control rate was remarkably lower than diastolic pressure control rate. Majority patients required 2 or more antihypertensive drugs for effective pressure control (1.5 drug per patients in average in both 4 or 12 weeks groups).

CONCLUSIONThe prevalence of risk factors, target organ damage and concomitant disease were high in Chinese patients with hypertension and comprehensive interventions were indicated. To reach goal blood pressure control in patients with hypertension, follow up intensifying and drug therapy guidance are required within the context of usual medical care.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; China ; Female ; Humans ; Hypertension ; prevention & control ; therapy ; Male ; Middle Aged ; Prognosis ; Prospective Studies ; Risk Factors ; Treatment Outcome ; Young Adult