Objective To explore a three-dimensional examination method for retinal vessels. Design Experimental study. Participants Retinal vascular digest preparations of rat. Methods After deep anaesthesia, rats were sacrificed and perfused till eyeballs pale. Then 4% paraformaldehyde was perfused for vascular internal fixation. Eyeballs were fixed in 4% paraformaldehyde for 24hr, and the retinal vessels were isolated with collagenase digest technique. After immunofluorescence staining, the retinal vessels were observed with laser scanning confocal microscope. Main Outcome Measures The digest state of retinal vascular digest preparations and three-dimensional observation of the preparations. Results Ideal complete retinal vascular digest preparations were obtained after collagenase digestion. Three-dimensional characteristics of retinal vessels can be observed with laser scanning confocal microscope. Conclusions Modified retinal vascular digest preparations combined with laser scanning confocal microscope provided us a method for retinal vascular three-dimensional structure observation.(phthalmol CHN,2006,15:138-141)

The RAS (rat sarcoma) gene is one of the important oncogenes, and its mutation is present in about 30% human tumors. KRAS (kirsten rat sarcoma viral oncogene) is one of the three RAS subtypes, and KRAS mutations are more common than the mutations in other two RAS subtypes. In recent years, with the continuous research, new ideas have been provided for the treatment of cancers via targeting-KRAS. Efforts have been made to develop various KRAS inhibitors. Here, based on the mechanism of action, we classified KRAS inhibitors into two categories: inhibitors that directly target KRAS and inhibitors that indirectly act on KRAS. The representative KRAS inhibitors were summarized and introduced in this paper.

Objective To investigate the effects of ω-3 polyunsaturated fatty acids (ω-3 PUFA) on inflammatory response of intestine and bacteria translocation in rats with traumatic shock (TS) in order to explore the underlying mechanism.Methods A total of 36 male Wistar rats provided by Academy of Military Medical Sciences Animal Center were assigned randomly (random number) into 3 groups (n =12 in each group):sham operation group,TS model group and PUFA pretreatment group.Rat models of IS were established by comminuted fracture of femur and depletion of blood,and 2 mg/kg ω-3 PUFA or normal saline were injected 12 hours and 2 hours before modeling.Blood specimens were collected and intestinal tissue samples were obtained 120 min after modeling.The serum levels of tumor necrosis factor-o (TNF-α),IL-1β,IL-10 and 8-iso-prostaglandin F 2α (8-iso-PGF2α) were measured with ELISA.Light microscopic examination was carried out for histopathological assessment of the intestina tissue and the intestinal mucosa damage index ( IMDI ) was calculated.The number of marked bacilli found in mesenteric lymph nodes,lung,liver,spleen,and kidney tissues were counted under a fluorescent microscope.The percentages for categorical variables and mean ± SD for continuous variables were expressed. Chi-square test and unpaired t-test were used for comparisons among groups,and statistical significance defined as P ＜ 0.05.Results The levels of TNF-α,IL-1β,IL-10 and 8-iso-PGF2α,the IMDI and the positive rates of bacteria translocation in TS model group were [ (325.14 ±21.17) ng/ml,(26.93 +2.58) μg/L,(7.59 ± 1.26) μg/L,(259.73 +61.32) pg/ml,(4.15 +0.37) and 58.33％,respectively] and those in PUFA group were [ (251.47 + 19.16) ng/ml,(17.81±1.94) μg/L,(9.44±1.85) μg/L,(171.44±39.25) pg/ml,(3.28±0.43) and 36.67％,respectively ].And those biomarkers in both TS group and PUFA group were higher obviously than those in sham group [ (37.02 ±5.54) ng/ml,(2.49 ±0.67) μg/L,(2.93 ±0.74) μg/L,(81.26 ± 15.18) pg/ml,(0.33 ±0.12) and 6.67％,respectively,P＜0.01].Compared with TS model group,the levels of TNF-α,IL-1β and 8-iso-PGF2α,the IMDI and the positive rates of bacteria translocation were lower,and the levels of IL-10 were higher in PUFA group ( P ＜ 0.01 or P ＜ 0.05 ).Conclusions The supplementation of ω-3 PUFA lessens the injury of intestina mucosa after traumatic shock,and it may be associated with the inhibition of inflammatory response by intestine and bacteria translocation.was carried out for histopathological assessment of the intestina tissue and the intestinal mucosa damage index ( IMDI ) was calculated.The number of marked bacilli found in mesenteric lymph nodes,lung,liver,spleen,and kidney tissues were counted under a fluorescent microscope.The percentages for categorical variables and mean ± SD for continuous variables were expressed. Chi-square test and unpaired t-test were used for comparisons among groups,and statistical significance defined as P ＜ 0.05.Results The levels of TNF-α,IL-1β,IL-10 and 8-iso-PGF2α,the IMDI and the positive rates of bacteria translocation in TS model group were [ (325.14 ±21.17) ng/ml,(26.93 +2.58) μg/L,(7.59 ± 1.26) μg/L,(259.73 +61.32) pg/ml,(4.15 +0.37) and 58.33％,respectively] and those in PUFA group were [ (251.47 + 19.16) ng/ml,(17.81±1.94) μg/L,(9.44±1.85) μg/L,(171.44±39.25) pg/ml,(3.28±0.43) and 36.67％,respectively ].And those biomarkers in both TS group and PUFA group were higher obviously than those in sham group [ (37.02 ±5.54) ng/ml,(2.49 ±0.67) μg/L,(2.93 ±0.74) μg/L,(81.26 ± 15.18) pg/ml,(0.33 ±0.12) and 6.67％,respectively,P＜0.01].Compared with TS model group,the levels of TNF-α,IL-1β and 8-iso-PGF2α,the IMDI and the positive rates of bacteria translocation were lower,and the levels of IL-10 were higher in PUFA group ( P ＜ 0.01 or P ＜ 0.05 ).Conclusions The supplementation of ω-3 PUFA lessens the injury of intestina mucosa after traumatic shock,and it may be associated with the inhibition of inflammatory response by intestine and bacteria translocation.

Objective To investigate the effects of ω-3 polyunsaturated fatty acid (ω-3 PUFA) on acute lung injury (ALI) in a rat model of traumatic shock. Methods Thirty-six male Wistar rats aged 3 months were randomly assigned into 3 groups ( n = 12 each): control group (group C) ; traumatic shock group (group TS) and ω-3 PUFA + TS group (group to-3 PUFA) . Traumatic shock was induced by fracture of femur and hemorrhage according to the method described by Feeney in groups TS and ω-3 PUFA. In group ω-3 PUFA, ω-3 PUFA 2 ml/kg was injected via the caudal vein at 12 and 2 h before induction of traumatic shock. Arterial blood samples were taken at 120 min after traumatic shock was successfully induced for determination of serum concentrations of TNF-α, IL-1β, IL-10 and 8-iso-PGF2α by ELISA. The animals were then sacrificed and lungs were removed for-determination of W/D lung weight ratio and microscopic examination. Results Traumatic shock significantly increased serum concentrations of TNF-α, IL-1β, IL-10 and 8-iso-PGF2α, W/D ratio and pathologic scores of lung tissues in groups TS and ω-3 PUFA as compared with group C.ω-3 PUFA significantly attenuated traumatic shuck-induced increase in serum concentrations of TNF-α, IL-1β and 8-iso-PGF2α , W/D ratio and pathologic scores of lung tissues but further increased the serum IL-10 concentration in group ω-3 PUFA as compared with group TS. Conclusion ω-3 PUFA can significantly inhibit the svstemic inflammatory response and ameliorate traumatic shock-induced ALI.

Objective To investigate the effects of ω-3 polyunsaturated fatty acids (ω-3 PUFA) on systemic inflammatory response and intestinal mucosa barrier in rats with traumatic brain injury and hemorrhagic shock (TBIS).Methods A total of 36 male Wistar rats were equally randomized into 3 groups:sham operation group,TBIS model group,and ω-3 PUFA pretreatment group.The serum levels of tumor necrosis factor-α (TNF-α),8-iso-prostaglandin F2 a (8-iso-PGF2 a),interleukin (IL)-1 β,and IL-10 were measured by enzyme linked immunosorbent assay (ELISA).HE staining was performed for morphological assessment of the intestinal tissue and evaluation of the intestinal mucosa damage index (IMDI).The marked bacilli of the mesenteric lymph nodes,lung,liver,spleen,and kidney tissue were counted under a fluorescent microscope.Results Compared with those in the sham group [ (38.15 ± 6.37) ng/ml,(84.91 ± 17.22) pg/ml,(2.52 ± 0.83 ) μg/L,(2.86 ± 0.82) μg/L,0.36 ±0.14,and 8.33％ ],the serum levels of TNF-α [ (328.11 ±20.09) and (244.37 ±21.82) ng/rrl],8-iso-PGF2a [ (263.47±55.19) and (176.35±41.63) pg/ml],IL-1β [ (27.06±2.61) and (18.91 ±1.78) μg/L],IL-10 [ (7.63 ± 1.29) and (9.52 ± 4.66) μg/L],the IMDI (4.18 ±0.39 and 3.31 ±0.40),and the positive rates of bacterial translocation (56.67％ and 35.00％ ) were significantly higher in both the TBIS model group and ω-3 PUFA group ( all P ＜ 0.01 ).Compared with TBIS model group,the levels of TNF-α,8-iso-PGF2 a,and IL-1 β,the IMDI,and the positive rate of bacterial translocation were significantly lower ( all P ＜ 0.05 ) and the levels of IL-10 were significantly higher in the ω-3 PUFA group (P ＜0.01 ).Conclusion The supplementation of ω-3 PUFA can remarkably inhibit the systemic inflammatory response and protect the integrity of intestinal mucosa in rat with TBIS.

ObjectiveTo investigate the effects of ω-3 polyunsaturated fatty acid (PUFA) preconditioning on liver injury in a rat model of traumatic shock.MethodsForty-eight male Wistar rats aged 3 months weighing 240-260 g were randomly divided into 4 groups ( n =12 each): sham operation group (group S) ; group S + ω-3 PUFA; traumatic shock group (group TS) and group TS + ω-3 PUFA.In groups S + ω-3 PUFA and group TS + ω-3 PUFA,ω-3 PUFA 2 ml/kg was injected via the caudal vein at 12 and 2 h before induction of traumatic shock.In groups S and TS,normal saline was given instead of ω-3 PUFA.Traumatic shock was induced by fracture of femur and hemorrhage in groups TS and TS + ω-3 PUFA.The arterial blood samples were taken at 2 h after induction of traumatic shock for determination of serum activities of ALT,AST and concentrations of 8-iso-prostagiandin F2,(8-iso-PGF2α) and TNF-α.The liver was removed for determination of levels of SOD and MDA,glutathione (GSH)and microscopic examination.ResultsCompared with group S,the serum ALT,AST,8-iso-PGF2α and TNF-α levels and MDA content in the liver tissues and score of liver injury were significantly increased,but the liver tissues levels of SOD,GSH were decreased in groups TS and TS + ω-3 PUFA( P ＜ 0.01 ).Compared with group TS,the serum ALT,AST,8-iso-PGF2α and TNF-α levels and MDA content in the liver tissues and score of liver injury were significantly decreased,but SOD activity and GSH content in the liver tissues were increased in group TS + ω-3 PUFA( P ＜ 0.05 or 0.01 ).Conclusionω-3 PUFA preconditioning can reduced liver injury in a rat model of traumatic shock through inhibiting lipid peroxidation and inflammatory reaction.

Objective To observe the effect of ultrashort wave diathermy on collagen type I expression in early stage of hormon-induced avascular necrosis of the femoral head (ANFH) in rabbit.Methods A total of 40 New Zealand white rabbits were randomly divided into two groups:a control group (n=10) and a treatment group (n =30).All the animals in the treatment group were injected with horse serum and methylprednisolone to establish the ANFH model,and then divided into 2 subgroups:a model group and a ultrashort wave diathermy group,which were treated accordingly.After 12 weeks of treatment,all the animals were sacrificed and collagen type I expression in the femoral head was observed.Results It was shown that the expression of the collagen type I was significantly lower in the model animals than that in the controls as indicated by the stronger immunohistochemistry staining for rabbit collagen type,while that of the ultrashort wave diathermy group was significant higher than the control group ( P

Traditional Chinese medicine is a treasure of Chinese culture, absorbing the wisdom of the Chinese people. Continuous application of new technologies makes traditional Chinese medicine research advance with the times. After several years of development, high-throughput transcriptome study has become a mature research tool in biology. This paper reviewed the advances in medicine transcriptome study, and compared two sequencing platforms, Roche's GS FLX platform and Illumina's HiSeq 2000 platform. Moreover, this paper introduced medicine transcriptome analysis process, with Panax quinquefolius and Lonicera japonica for examples, showing the characteristics of traditional Chinese medicine transcriptome studies. High-throughput transcriptome studies facilitate traditional Chinese medicine research with overall understand of functional genes, give clear elucidation of metabolic pathways, lay molecular foundation for the traditional Chinese medicine research and offer modern interpretation for traditional Chinese medicine theory. However, the current study faces several difficulties, including weak molecular basis, high sequencing cost and staff shortages in data anaysis. In the future, with the development in sequencing technology, the combination of transcriptome and other genomics, such as proteome and metabolome, will lay a solid foundation for the new high-throughput screening and developing model for the traditional Chinese medicine industry.
Biomedical Research ; methods ; trends ; Forecasting ; Gene Expression Profiling ; methods ; Gene Expression Regulation, Plant ; Humans ; Lonicera ; genetics ; Medicine, Chinese Traditional ; methods ; trends ; Panax ; genetics ; Phytotherapy ; methods ; trends ; Transcriptome ; genetics

Objective To study the process and mechanism underlying Wallerian degeneration of the central nervous system after stroke.Methods A case suspected of stroke with bilateral symmetrical lesions in middle cerebellar peduncles (MCPs) was described.The etiology of bilateral MCP abnormal signals on MR was analyzed according to the clinical process and neuroanatomy.Results Unilateral paramedian pontine infarction,covering the crossing area of pontocerebellar fibers, would cause bilateral secondary degeneration of MCPs,with hyperintense signals on T2-,Flair and diffusion-weighted images.Conclusions Wallerian degeneration of projecting system is a common sequel after stroke and should not be misdiagnosed as other diseases.

Professor XU Rui-Zheng's experience in clinical diagnosis and treatment of auricular acupuncture are introduced. He is good at using auricular acupuncture to treat various diseases and symptoms, and he has rich experience in treatment of difficult and complicated cases, reflecting both syndrome differentiation treatment and an organic conception of the human body in treatment, with obviously clinical effect. He sums up clinical experience of many years, attaining the experience of ten wards, i.e. observation, touching, searching, detection, questioning, treatment program, pressing, treatment, regulation, advance.
Acupuncture, Ear ; Diagnosis, Differential ; Humans ; Medicine, Chinese Traditional