1.Ca~(2+)/calmodulin-dependent kinaseⅡare involved in tumor necrosis factor ?-induced cardiomyocyte hypertrophy in rats
Guijun WANG ; Yusheng YAO ; Hongxin WANG
Chinese Pharmacological Bulletin 1987;0(03):-
Aim To investigate whether Ca2+/calmodulin-dependent kinase Ⅱ(CaMKⅡ)contribute to tumor necrosis factor ?(TNF-?)-induced cardiomyocyte hypertrophy.Methods The protein content was assayed with Lowry's method.The cardiomyocytes volumes were measured by computer photograph analysis system.The protein synthesis was assayed with[3H]-lencine incorporation method.[Ca2+]i transient was measured by Till image system by cell-loading Fura-2/AM.The expression of CaMKⅡ?B was determined by Western blot.Results ① TNF-? significantly induced the increase of protein content,[3H]-leucine incorporation and cell size;These responses were significantly suppressed by KN93,a selective CaMKⅡ inhibitor.② TNF-? increased the amplitude of the spontaneous Ca2+ transients in cultured ventricular myocytes from the neonatal rat;CaMKⅡ inhibitor KN93 can suppress the elevation induced by TNF-?.③ TNF-? significantly increased the expression of CaMKⅡ?B.Concluslon CaMKⅡ signal pathway are involved in TNF-?-induced cardiomyocyte hypertrophy in rats.
2.Ca~(2+)/calmodulin-dependent kinaseⅡare involved in tumor necrosis factor α-induced cardiomyocyte hypertrophy in rats
Guijun WANG ; Yusheng YAO ; Hongxin WANG
Chinese Pharmacological Bulletin 2010;26(3):387-391
Aim To investigate whether Ca~(2+)/calmodulin-dependent kinase Ⅱ(CaMKⅡ)contribute to tumor necrosis factor α(TNF-α)-induced cardiomyocyte hypertrophy.Methods The protein content was assayed with Lowry's method.The cardiomyocytes volumes were measured by computer photograph analysis system.The protein synthesis was assayed with[~3H]-lencine incorporation method.[Ca~(2+)]_i transient was measured by Till image system by cell-loading Fura-2/AM.The expression of CaMKⅡδ_B was determined by Western blot.Results ① TNF-α significantly induced the increase of protein content, [~3H]-leucine incorporation and cell size;These responses were significantly suppressed by KN93, a selective CaMKⅡ inhibitor.② TNF-α increased the amplitude of the spontaneous Ca~(2+) transients in cultured ventricular myocytes from the neonatal rat;CaMKⅡ inhibitor KN93 can suppress the elevation induced by TNF-α.③ TNF-α significantly increased the expression of CaMKⅡδ_B.Concluslon CaMKⅡ signal pathway are involved in TNF-α-induced cardiomyocyte hypertrophy in rats.
3.Effect of inadequate reduction of medial wall on the postoperative varus deformity following calcaneal fracture surgery and other influencing factors of varus deformity
Guijun YAO ; Jian SHANG ; Wei WANG
Chinese Journal of Orthopaedic Trauma 2016;18(6):465-469
Objective To explore the effect of inadequate reduction of the medial wall on the postoperative varus deformity following calcaneal fracture surgery and other influencing factors of varus deformity.Methods A retrospective analysis was conducted of the 60 patients with calcaneal fracture involving the medial wall (60 feet) who had been treated from October 2005 to September 2015.They were 51 men and 9 women,18 to 55 years of age (average,38.4 years).According to the Sanders classification,24 patients belonged to type Ⅱ,30 to type Ⅲ,and 6 to type Ⅳ.We measured the integrity of the pre-and post-operative medial walls,the height and width of the pre-and post-operative calcanei,the pre-and post-operative B(o)hler angles and the pre-and post-operative calcaneal varus angles for statistical analysis.Results The effect of postoperative height reduction of the medial wall on the postoperative correction of varus angle was significantly larger than that of the lateral wall (P < 0.05).The higher the integrity of the postoperative medial wall,the larger the correction of the postoperative varus angle.The normal rate of postoperative calcaneal varus angle significantly decreased with the increased Sanders classification severity (P =0.001).The postoperative reduction of the height and width of the calcaneus and the integrity of the preand post-operative medial walls were significantly positively correlated to the normal rate of postoperative calcaneal varus angle (P < 0.05).Conclusions The medial wall has a large influence on the postoperative calcaneal varus angle.The higher integrity of the preoperative medial wall,and the more adequate reduction and fixation of the postoperative medial wall as well,the higher rate of postoperative normal calcaneal varus angle.The postoperative reduction of the calcaneal height also affects the varus angle.When the heights of the medial and lateral walls are recovered,the normal rate of varus angle is the highest;when reduction of the medial wall is inadequate but reduction of the lateral wall is fine,the normal rate of varus angle is the lowest.
4.Bipolar hemiarthroplasty for unstable intertrochanteric fractures in the elderly patients
Yang CAO ; Bin LIU ; Dawei WANG ; Guijun YAO ; Zhenggang BI
Chinese Journal of Trauma 2011;27(10):909-912
Objective To explore the application and clinical effect of bipolar hemiarthroplasty with bipolar prosthesis on unstable intertrochanteric fracture in the elderly patients.Methods The study involved 53 patients aged over 75 years with intertrochanteric fracture treated with bipolar hemiarthroplasty in our hospital from April 2003 to January 2010.According to Evans-Jensen classification,there were 24 patients with type Ⅲ fractures,eight with type Ⅳ and 11 with type Ⅴ.Osteoporosis degree was at Singh degree Ⅰ in 13 patients,degreeⅡ in 18,degree Ⅲ in 12 and degree Ⅳ in 10.Most patients underwent operation within three days after injury.Results The operation duration was(75 ±10)min,with intraoperative blood loss of(350 ± 68)ml.Three patients were lost to follow-up after discharge and one patient was died of respiratory failure caused by chronic bronchitis five months after operation.Forty-nine patients were followed up for 12-93 months(mean 38 months),which showed no joint dislocation,or loosening,subsidence or rupture of the prosthesis.According to the Harris score of hip joint,the result at final follow-up was excellent in 29 patients,good in 13 and fair in seven,with excellence rate of 86%.Conclusions Bipolar hemiarthroplasty is an effective treatment for osteoporotic and unstable intertrochanteric fractures in the elderly patients.However,as the complemented therapeutic method of proximal femoral nail antirotation(PFNA),bipolar hemiarthroplasty has severe secondary trauma and its indications must be strictly mastered.
5.Cloning and identification of partial positive regulatory sequence of Na+/H+ exchanger-1 gene from human lung cancer cells
Guoming WU ; Guijun HUANG ; Guisheng QIAN ; Wei YAO
Journal of Third Military Medical University 2001;23(2):125-127
Objective To clone the partial positive regulatory fragment of Na+/H+ exchanger-1 (NHE-1) gene from human lung cancer cells. Methods After BamHⅠ and EcoRⅠ cut sites were added to the 5' ends of the upstream and downstream primers respectively, the partial positive regulatory sequence of NHE-1 gene was cloned with the length of 170 bp from genomic DNA of lung cancer cell line A549 cells with PCR method. The cloned fragment was ligated to plasmid pUC18. Finally, the constructed recombinant was identified with enzyme cut, PCR and DNA sequencing. Results The cloned fragment was about 170 bp in size and successfully ligated to pUC18 with identifiation of double enzyme cut and PCR. DNA sequencing approved that the fragment cloned was objective one with 168 bp in length. Compared with the reported sequence, two t were lost. Conclusion The positive regulatory fragment of NHE-1 gene from human lung cancer cells was successfully cloned.
6.Cholecystokinin octapeptide inhibits tumor necrosis factor-? transcription and nuclear factor-?B activity induced by lipopolysaccharide in rat pulmonary interstitial macrophages
Shujin LI ; Yuxia YAO ; Guijun ZHU ; Yiling LING ; Bin CONG
Chinese Journal of Pathophysiology 2000;0(08):-
AIM: To elucidate the anti-inflammatory mechanism of cholecystokinin octapeptide (CCK-8). METHODS: The pulmonary interstitial macrophages (PIMs) from rats were stimulated with LPS (1 mg?L~(-1)) in the presence or absence of CCK-8 (10~(-8)-10~(-6) mol?L~(-1)) or/and CCK receptor antagonist proglumide (2 mg?L~(-1)). The expression of TNF-? mRNA was assayed by reverse transcription polymerase chain reaction (RT-PCR) at 3 h of the stimulation, and nuclear factor-?B (NF-?B) binding activity was analyzed by electrophoretic mobility shift assay (EMSA) at 1 h of stimulation. The I?B? protein level in the cytoplasma at 30 min of the stimulation was detected by Western blot. RESULTS: CCK-8, at concentrations from 10~(-8) mol?L~(-1) to 10~(-6) mol?L~(-1) obviously inhibited LPS-induced TNF-? mRNA expression and NF-?B binding activity in a dose-dependent manner. Stimulation with LPS resulted in a reduction of I?B? protein level in PIMs, which was elevated by CCK-8. The effects of CCK-8 on NF-?B activity and I?B protein level were attenuated by CCK receptor antagonist proglumide. CONCLUSION: CCK-8 inhibits LPS-induced TNF-? mRNA expression by regulating NF-?B activity in rat PIMs, which is mediated through CCK receptors and inhibition of I?B? degradation. This represents one of the anti-inflammatory mechanisms of CCK-8.
7.Epidemiological characteristics of human plague in different age groups in China from 1950-2012.
Cheng JU ; Zhencai LIU ; Guijun ZHANG ; Cheng XU ; Xiaoheng YAO ; Tianji DUAN ; Lei CHEN ; Xiaolei ZHOU ; Xianbin CONG
Chinese Journal of Epidemiology 2014;35(1):101-103
Adolescent
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Adult
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Age Distribution
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Aged
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Aged, 80 and over
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Child
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Child, Preschool
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China
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epidemiology
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Humans
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Middle Aged
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Plague
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epidemiology
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Yersinia pestis
8.Application value of serum pepsinogen and Helicobacter pylori combined with endoscopic Kimura-Takemoto classification in the diagnosis of early gastric cancer
Shengyi ZHU ; Linhua YAO ; Guijun WEI
Chinese Journal of Primary Medicine and Pharmacy 2023;30(6):856-861
Objective:To investigate the application value of pepsinogen, Helicobacter pylori combined with endoscopic Kimura-Takemoto classification in the diagnosis of early gastric cancer. Methods:Sixty patients with gastric cancer who received treatment in the Department of Gastroenterology, the First People's Hospital of Huzhou from January to June 2022 were included in the gastric cancer group. An additional 60 patients with benign gastric lesions (benign gastric lesion group) and 60 patients with precancerous lesions of the stomach (precancerous lesion group) were also included in this study. Serologic testing for pepsinogen and Helicobacter pylori antibody combined with endoscopic Kimura-Takemoto classification was performed to evaluate their application value in the diagnosis of early gastric cancer. Results:Compared with the benign gastric lesion and precancerous lesion groups, the pepsinogen I/pepsinogen II ratio was significantly lower, and the pepsinogen II level and Helicobacter pylori infection rate [71.67% (43/60)] were significantly higher in the gastric cancer group ( F = 108.14, 71.75, 38.43, χ2 = 6.89, all P < 0.05). Compared with the benign gastric lesion and precancerous lesion groups, the Kimura-Takenmoto classification in the gastric cancer group was significantly higher ( H = 38.91, P < 0.05). In the gastric cancer group, pepsinogen I level and pepsinogen I/pepsinogen II ratio decreased and pepsinogen II level increased with the increase of pathological stage ( F = 65.79, 5.66, 53.32, all P < 0.01). There was no significant difference in Helicobacter pylori infection rate between different stages of gastric cancer ( P < 0.05) in the gastric cancer group. There was no significant difference in Kimura-Takenmoto classification between different stages of gastric cancer (all P > 0.05) in the gastric cancer group. The area under the receiver operating characteristic curve plotted for evaluating pepsinogen I, pepsinogen II, and pepsinogen I/pepsinogen II ratio for diagnosis of gastric cancer was 0.865, 0.664, and 0.881, respectively. Conclusion:Serum pepsinogen, Helicobacter pylori combined with endoscopic Kimura-Takemoto classification can increase the diagnostic rate of early gastric cancer. The Kimura Takemoto classification is helpful for risk stratification in the endoscopic screening of gastric cancer, and its results are consistent with pepsinogen levels. The combined application is of a high application value.
9.The effect of bone morphogenetic protein-2 and osteoprotegerin in trans-sutural distraction osteogenesis.
Yusheng YAO ; Hua HUANG ; Shimin CHANG ; Chengyue WANG ; Guijun WANG
West China Journal of Stomatology 2012;30(4):425-429
OBJECTIVETo determine if locally administered bone morphogenetic protein-2 (BMP-2) and osteoprotegerin (OPG) improved osteogenesis and new bone formation by trans-sutural distraction osteogenesis.
METHODSTwenty four dogs were divided into three groups randomly and received new internal trans-sutural distraction osteogenesis treatment. Five days after operation, infusion apparatus with double-tube was inserted to submucosa near the distracted zone to deliver controlled release agent of recombinant human bone morphogenetic protein-2/poly (lactic-co-glycolic acid)/fibrin sealant (rhBMP-2/PLGA/FS) in group A and group C. Recombinant human osteoprotegerin/fibrin sealant (rhOPG/ FS) was injected three weeks later in group B and group C. Histology staining and bone histomorphometry were used to measure the changes of maxillary bone sutura after distraction for 1, 2, 4 and 6 weeks.
RESULTSNew bone formation observed in distracted zone showed a significant increase in group A and C. Transmission electron microscope showed the osteoblast and osteocyte were active with dilated rough endoplasmic reticulum and a large number of chondriosomes and Golgi complex. After distraction for 6 weeks, indexes of osteoblast of group A, B, and C were 38.5 +/- 7.7, 35.7 +/- 6.5, and 41.7 +/- 11.0, indexes of osteoclast (Ioc) were 5.9 +/- 1.0, 1.2 +/- 0.3, and 2.8 +/- 0.4, bone trabecula thicknesses were (38.36 +/- 13.28), (66.20 +/- 9.16), and (51.85 +/- 9.92) microm respectively. Increased bone density and decreased Ioc were found in group B and C.
CONCLUSIONThe new elastic distractor is effective in inducing new bone formation. BMP-2 and OPG combination acts synergistically, and leads to significant enhancement of bone formation and remodeling.
Animals ; Bone Density ; Bone Morphogenetic Protein 2 ; Dogs ; Humans ; Lactic Acid ; Maxilla ; Osteoblasts ; Osteogenesis ; Osteogenesis, Distraction ; Osteoprotegerin ; Polyesters ; Polyglycolic Acid ; Polymers ; Recombinant Proteins ; Transforming Growth Factor beta
10.Hemodynamic simulation study of tandem carotid artery stenosis
Junjie CAO ; Zhichao YAO ; Guijun HUO ; Zhanao LIU ; Yao TANG ; Jian HUANG ; Dayong ZHOU ; Liming SHEN
Journal of Interventional Radiology 2024;33(2):150-155
Objective By using the computational fluid mechanic(CFD)method the tandem carotid artery stenosis(TCAS)was simulated on the model,and to compare the postoperative hemodynamic changes of different surgical procedures.Methods One patient with tandem stenosis of internal carotid artery(ICA)and common carotid artery(CCA)was selected.CFD technique was used to establish four three-dimensional(3-D)models of the carotid bifurcations,including one model of a real patient and three models of presumptive surgery.The hemodynamic analysis was performed with these models so as to explore the development mechanism of TCAS and to discuss the selection of suitable surgical plan.Results In tandem stenosis,the stenosis was preferentially formed in CCA and subsequently led to ICA stenosis.The local hemodynamic situation in TCAS was more complex and more risky than in single carotid artery stenosis.In tandem stenosis,the treatment of one stenosis site would affect the blood flow at the next stenosis site and cause restenosis or plaque rupture.Conclusion In treating patients with TCAS,CFD simulation examination should be performed when the surgical plan is formulated,which can help clinicians to predict the postoperative changes in blood flow and to choose the appropriate surgical plan.