2.Inhibition effect of celecoxib on the experimental choroidal neovascularization
Chinese Journal of Ocular Fundus Diseases 2010;26(1):32-36
Objective To observe the inhibition effect of selective cyclooxygenase-2 inhibitor (celecoxib) on the experimental choroidal neovascularization (CNV).Methods Thirty 8-10 weeks old healthy male Brown-Norway(BN) rats were randomly divided into the control,laser and celecoxib group,with 10 rats in each group.At the dosage of 50 mg/kg,celecoxib was garaged twice per day.After 7 days,experimental CNV was induced by Krypon laser on laser group and celecoxib group.Fundus fluorescein angiography (FFA) was performed on days 3,7,14,21,30 after laser photocoagulation.On days 21 after photocoagulation,5 rats in each group were sacrificed and the relative thickness of CNV membranes,the expression of COX-2,vascular endothelial growth factor(VEGF) and matrix metalloproteinase-2 (MMP-2) Were studied by histopathologic or immunohistochemistry examination.Results On days 21 after photocoagulation,the incidence of CNV in the celecoxib group is significantly lower than that in the laser group (X~2=7.1068,P=0v0077);the relative thickness of the CNV membranes in the celecoxib group is reduced 41.38% compared to the laser group,the difference is statistically significant (t=16.7600,P=0.0000).COX-2,VEGF and MMP-2 expression in the CNV membrane of celecoxib group were significantly lower than in control group (t=5.7100,5.8400,8.0200;P=0.0000);the COX-2,VEGF and MMP-2 expressions in choroid and retina of control group were weak.Conclusion Prophylactic celecoxib can reduce the expression of VEGF and MMP-2 by inhibiting COX-2,and prevent the CNV induced by laser photocoagulation.
3.Pleiotrophin and neural repair after peripheral nerve injury
Jin LI ; Jianghai CHEN ; Hao KANG
International Journal of Surgery 2008;35(8):552-556
Pleiotrophin, discovered in 1989, was thought as a muhi-funetional growth factor; It plays an important role in tumor occurrence and central neural system. The latest research showed pleiotrophin signal pathway probably takes part in neural repair after peripheral nerve injury, especially in the followed crisis point, such as the protection of spinal cord neuron, the promotion of the speed of neuron axon regeneration, the guidance of neuron axon regeneration, skeleton muscle reirmervation. It potentially makes a key role in the guidance of neural axon regeneration in peripheral neural system and muscle reianervation. Along with the related researches go deep, pleiotrophin gene might become a controllable target for promoting the result of peripheral neural repair and reconstructing the neuromuscular junction.
4.Discussion on astronomical background of yiyi calenders chronological era by heavenly stems and earthly branches
Jiucheng JIN ; Guojian GAO ; Hao JIN ; Ren LI
China Journal of Traditional Chinese Medicine and Pharmacy 2005;0(05):-
The traditional Chinese medicine deduces the 'Tianshi'based on the chronological era by heavenly stems and earthly branches,whose mechanism has been an eternal mystery.The references discussed the astronomical background of the chronological record of years by heavenly stems and earthly branches.In this paper,① A new law of the nature and human body is unitied was discovered.The relative position of the diurnal motion of the sun and the motion of five yao observed from the earth repeated with a precise period of 60 years,(1years,=360days).It lead the discussion of astronomical background for the chronological record of days and shichen by heavenly stems and earthly branches.② The yiyi calendar's chronological record of months by heavenly stems and earthly branches had the same astronomical background as the chronological record of years,i.e.the relative positions of yearly motion of the sun,the synodic month and the motion of five yao observed from the earth had an approximate cycle time of 60 years.③ The paper further discovered that the relative positions of the diurnal and yearly motion of the sun,the synodic month and the motion of five yao observed from the earth repeated every 240 years.This indicated the astronomical background for the fact that the yiyi calendar's sizhu heavenly stems and earthly branches group had a cycle time of 240 years.④ The traditional Chinese medicine should use the yiyi calendar's local time.
5.Progress in study of a novel protein Nischarin
Hao MA ; Fei LI ; Ning WU ; Jin LI
Chinese Pharmacological Bulletin 2003;0(07):-
Nischarin is a novel protein interacting with integrin ?5 subunit.A series of studies have indicated that Nischarin plays an important role in inhibiting tumor cells migration and invasion.Meanwhile it may also serve as the functional I1-imidazoline receptor.To study this protein will be in favour of understanding the biological mechanisms of inhibiting cell migration and developing novel drugs such as inhibitors for tumor invasion.The article mainly reviews the recent progress in studies on Nischarin.
6.Expression of Dishevelled protein is correlated with the proliferation and invasion of glioma
Jian LI ; Geng GUO ; Yimin FAN ; Jiehe HAO ; Jin LI
Cancer Research and Clinic 2014;26(4):250-252,256
Objective To investigate the correlation between Dishevelled protein expression and the proliferation and invasion of glioma cells.Methods 67 cases of brain glioma specimens were collected.The expression of Dishevelled protein was detected with immunohistochemical method.The immunoreactivity score (IRS) of Dishevelled protein,and proliferation index (PⅠ) and invasion index (Ⅱ) were measured and their correlations were analyzed.Results The positive rate of Dishevelled protein in glioma was 65.7 % (44/67).IRS,PⅠ and Ⅱ were 4.15±3.13,(30.93±17.92) %,(20.38±13.36) %,respectively.Both PⅠ and Ⅱ significantly increased with an increase in the pathological grade of brain glioma (P < 0.001).Furthermore,PⅠ and Ⅱ were significantly higher in the Dishevelled protein-positive group than those in the Dishevelled protein-negative group [(38.27±17.60) % vs (16.02±8.92) % of PⅠ and (30.03±13.81) % vs (10.63±4.41) % of Ⅱ,respectively,P < 0.001].PⅠ and Ⅱ of glioma cells were positively correlated with IRS of Dishevelled protein (r =0.940 between PⅠ and IRS,and r =0.953 between Ⅱ and IRS,respectively).Conclusion Dishevelled protein plays an important role in the proliferation and invasion of brain malignant glioma.
7.Evaluation of Feridex-enhanced MRI in the Diagnosis of Hepatic Lesions
Ji LI ; Yinhua JIN ; Xin HAO ; Zhibo LI ; Yang SONG
Journal of Practical Radiology 2000;0(02):-
Objective To evaluate Feridex(superparamagnetic iron oxide,SPIO)enhanced MRI in the diagnosis of hepatic lesions.Methods Feridex-enhanced MRI was performed in 31 patients with CT,or MRI proved or suspected hepatic lesions.T 2WI signal intensity of hepatic parenchyma,lesion and background noise was measured before and after enhancement separately.SNR and CNR of parenchyma and lesion before and after enhancement were calculated.The number of lesions on plain and enhanced scans were observed and alalyzed.Results Post-enhancement SNR of liver significantly decreased (?0.05).Post-enhancement lesion-liver CNR increased significantly (?
8.THE EFFECT OF PRESERVATION MYCELIAL FUNGUS BY THE METHODS OF SLANT AND RUBBER PLUG
Shi-Gui LI ; Jin-Gang GU ; Hao-Li GUO ;
Microbiology 1992;0(04):-
This paper has reported the effect of preservation myceh'al fungus by the methods of slant and rubber plug. The mycelial fungus preserved include 29 genera, 69 species, 128 strains. The preservation time is from 2 years to 17 years. By slant inoculation, their survival conditions are still good keep their original charaters. The result shows that it is simple and effective preserving some mycelial fungus by the methods of slant and rubber plug.
9.Effects of Ang-Ⅱ on c-fos mRNA and pro-α1ⅠmRNA of cadiac FBC in rat embryo
Yi, JIN ; Bao-yu, LI ; Cheng-hao, GUO
Chinese Journal of Endemiology 2001;20(3):169-171
Objective To observe the effects of Ang-Ⅱ on expressions of c-fos mRNA and pro-α1[Ⅰ]mRNA in fibroblasts (FBC) of rat embryo in the course of collagen synthesis.Methods The change of free Ca2+([Ca2+]i) was tested in fluorometry and the expressions of c-fos mRNA and pro-α1[Ⅰ]mRNA were tested by RT-PCR method in incubated FBC.Results The level of[Ca2+]i in FBC and the expressions of c-fos mRNA and pro-α1[Ⅰ]mRNA were enhanced with the increase of Ang-Ⅱ concentration(10-8~10-5and 10-7~10-6mol/L).Conclusions The expressions of c-fos mRNA and pro-α1[Ⅰ]mRNA were induced by Ang-Ⅱ activating signal system in FBC.
10.Clinical study on repairing huge soft tissue defect in foot with a extensive reverse peroneal artery flap
Jin LI ; Hao KANG ; Yanhua CHEN ; Fabin WANG ; Guangxiang HONG
Chinese Journal of Microsurgery 2009;32(3):184-186,illust 2
Objective To introduce the clinical application of a extensive revense peroneal artery flap in repairing big soft tissue defect in foot, especially in repairing a big defect in distal foot and the exposure of one or more metatarsophalangeal joint. Methods The skin flaps were used in 11 cases to repair the big soft tissue defect in foot, including the distal part of foot. The flap upper boundary may surpass the capitulum fibulae; The lower boundary may reach the back line between external malleolus and internal malleolus; Lat-eral boundary could overrun anterior margin of fibula about 2 cm; Inboard boundary could get to medial mar-gin of gastrocnemius muscle. In attention: the two branch vessels from peroneal vessel in the site of 11-13 cm and of 5-7 cm above the outer anker would be included in the flap. Results Ten of 11 skin flaps survived satisfactory. A small, marginal portion of one flap in one case presented necrosis. Conclusion The reverse peroneal artery flap is easy to elevate and safety, which is an ideal flap for a huge soft tissue defect in foot, especial in the distal part of foot.