China ; Occupational Health Services ; methods ; organization & administration

Background Our previous study demonstrated that kallikrein-kinin is a special protein in vitreous of the eye with proliferative vitreoretinopathy(PVR),and the expression intensity of kallikrein-kinin showed the positive correlation with the grade of PVR.Objective This study was to further explore whether kallikrein-kinin participate in the formation of PVR.Methods Rat retinal pigment epithelial cell line(RPE-J cells) was cultured in DMEM containing 4% fetal bovine serum and then prepared into suspension by PBS with the cells density of 2.5×108 cells/ml.Platelet-rich plasma was prepared by PBS with the platelet 2.5×108 /ml.RPE cell suspension(4μl) and platelet-rich plasma(6μl) was intravitreally injected in the left eyes of 30 clean Wistar rats to establish the PVR models,and 10μl sterile pyrogen-free normal saline solution was used in the same way in other matched rats as controls.The PVR was graded on Francine's criteria in 1 day,3,7,14,21,28 days after injection under the slit lamp.The serum,vitreous and retina were obtained in 28 days after injection to assess the expression of bradykinin using Western blot.The histopathology examination of rat retina was performed in the 28th day after injection.This experimental procedure followed the Regulations for the Administration of Affair Concerning Experimental Animals by State Science and Technology Commission.Results Typical PVR was seen in 25 models with the successful rate 89.3% at 28 days after injection.PVR 1,2,3 grades were respectively exhibited in 7,14,28 days under the slit lamp.Infiltration of inflammatory cells and migration of RPE cells were found in the 7th day.In the 14th day after injection,RPE cells transformed into fibroblasts and retinal detachment occurred after that.Western blot analysis revealed that bradykinin was detected in vitreous,serum and retinal samples of rats in experimental and control rats,but the expression intensity was higher in the rats of model groups.Conclusion Intravitreal co-injection of RPE cells and platelet-rich plasma can effectively induce a model of PVR in Wistar rat.The kallikrein-kinin system probably takes part in the onset of PVR.

Objective To investigate the anti-tumor effect of ZM-66 on multidrug-resistant leukemic cell line K562/ADM.
Methods The K562/ADM cells were treated with varying concentrations (0, 1, 2, 4×10-3 mmol/L) of ZM-66 or etoposide for 24 hours. The proliferation was detected by Sulforhodamine B Sodium Salt (SRB) assay and apoptosis was detected by flow cytometry analysis and fluorescent staining. In addition, the expression levels of p53 and bax genes in K562/ADM cells were detected by RT-PCR analysis. The level of P-glycoprotein (P-gp), P53 and Bax protein in K562/ADM cells were detected by Western blot assay.
Results SRB assay demonstrated that etoposide had little inhibitory effect on K562/ADM cells, whereas ZM-66 (1, 2, 4×10-3 mmol/L) had significantly inhibitory effect on K562/ADM cells (all P<0.01). The acridine orange/propidium iodide dual staining showed that there were typical condensation of chromatin and nuclear fragmentation nuclei with red color in ZM-66 treated cells. Flow cytometric analysis showed that there was a significantly increase of apoptotic cells in K562/ADM cells after treated with ZM-66. RT-PCR showed that the p53 and bax mRNA expression levels in K562/ADM cells treated with ZM-66 at 1, 2, 4×10-3 mmol/L were higher than those in the cell without treatment. Western blot showed that the P53 and Bax protein expression levels in K562/ADM cells treated with ZM-66 at 2, 4×10-3 mmol/L were higher than those in the cell without treatment. But the P-gp protein expression level in K562/ADM cells treated with ZM-66 at 2, 4×10-3 mmol/L was gradually lower than those in the cell without treatment.
Conclusion ZM-66 is able to induce cell death by apoptosis in vitro, as a result of the reverse of the apoptosis resistance in drug-resistant K562/ADM cells by modulating expression of key factors associated with apoptosis induction.

AlM: To evaluate the effect of rigid gas permeable contact lens ( RGP ) in correcting high myopia and astigmatism.METHODS: Forty-one patients ( 65 eyes ) with myopia (-9. 03 ± 6. 19DS, maximum -23. 00DS) and astigmatism (-1. 41 ± 1. 32DC, maximum -5. 50DC) were fitted with RGP after strict routine ophthalmological examination, objective refraction and subjective refraction. All these patients were followed after 1wk, 1, 3mo and half one year.RESULTS:Sixty-five eyes were fitted with RGP (-9. 92± 5. 96DS). RGP base curve ( BC) was majorly located within the range 7. 20 ~8. 25mm. 46. 2% eyes with RGP achieved 1. 0 ( BCVA ) and 80. 1% achieved above 0. 6 ( BCVA) . However, with spectacles, the percent was 28%(1. 0) and 60% (>0. 6), respectively. BCVA of RGP was 0. 81 ± 0. 22, but BCVA with spectacles was 0. 66 ± 0. 28, there was statistical significance (P<0. 01). There were 40 eyes (62%) fitted with RGP whose vision were enhanced more than 1 line, 24 eyes ( 37%) whose vision were not changed and 1 eye (2%) whose vision were dropped 1 line.CONCLUSlON:RGP effectively improves visual acuity of high myopia and astigmatism compared with spectacles.

Kaposi's sarcoma, non-hodgkin's lymphoma and invasive cervical was named AIDS-related cancer. This article introduces the appeal tumor research progress of modern medicine, and raises that antivirus, immune reconstitution and antitumor are the key factors in the treatment of AIDS-related cancer. Traditional Chinese medicine may play a role in the following aspect: relieve antiviral drug adverse reaction, have some antiviral effect,adjust the immune function,enhance efficacy and decrease toxicity of radiotherapy. According to the patients' immune function and the treatment phase, etc. It will contribute to improve the patients'lives and prolong the survival period to establish reasonable and comprehensive treatment strategies and to combine holistic therapy with individual therapy.
Acquired Immunodeficiency Syndrome ; complications ; Antineoplastic Agents ; adverse effects ; Humans ; Medicine, Chinese Traditional ; methods ; Neoplasms ; complications ; drug therapy ; immunology ; therapy

Objective To evaluate the clinical significance of CT angiography(CTA)in the diagnosis of arterioportal shunts(APS)associated with hepatocellular carcinoma(HCC).Methods One hundred and twenty-seven consecutive HCC patients accepted both dynamic enhancement CT and DSA examinations.The interval between CT and DSA exam was from 3 to 15 days.Based on transverse CT images in hepatic artery phase,CTA was performed for all the patients.By contrast with DSA results,the capabilities of transverse CT and transverse images combined with CTA in APS diagnosis were analyzed. Results In all 127 HCC cases,52 cases with APS were confirmed by DSA(40.94%),33 with central type of APS and 19 with peripheral type.Diagnostic sensitivity of APS based on transverse CT and combined CTA with transverse CT images were both 94.23%(49/52).However,specificity was 84.00%(63/75) and 97.33%(73/75),respectively,accuracy was 88.19%(112/127)and 96.06%(122/127),the predictive value of positive cases was 80.33%(49/61)and 96.08%(49/51),and the predictive value of negative cases was 95.45%(63/66)and 96.05%(73/76).Combined with CTA,false positive cases of 4 central type of APS and 6 peripheral type of APS were excluded which were demonstrated by transverse CT images.By contrast with DSA,the coincidence rate of the type of APS diagnosed by transverse images combined with CTA was 88.46%(46/52),including 90.91%(30/33)of central type of APS and 84.21%(16/19)of peripheral type.The supplying arteries of central type of APS were intuitively displayed by CTA in 23 cases,19 from proper hepatic artery and 4 from gastro-duodenal artery.Conclusion CTA techniques based on the dynamic enhancement CT exams could effectively promote the specificity and the accuracy of APS diagnosis.

OBJECTIVETo examine the effects of H-ras gene silence on cell cycle, proliferation and apoptosis of salivary adenoid cystic carcinoma -M (SACC-M) cell lines.

METHODSThe plasmid H-ras-shRNA, containing the sequence of shRNA targeting H-ras, and HK-shRNA (without interfering effect) were constructed and transfected into SACC-M cells. The cell line with shRNA plasmid stable expression was isolated by G418. The expression levels of H-ras were detected by RT-PCR and protein immunofluorescent assay; cell cycle and cell apoptosis were analyzed by flow cytometry (FCM). The proliferation of cell was also determined by subcutaneous tumor formation in nude mice.

RESULTSAfter transfection of H-ras-shRNA plasmid, the mRNA expression of H-ras in SACC-M cells was down-regulated by 61.80% and protein expression of H-ras was inhibited by 62.76%; the cell proliferation was inhibited obviously; the G0G1 phase cells were increased. The cell apoptosis rate of H-ras-shRNA group was significantly higher than that of HK-shRNA group (P <0.05). The volume of subcutaneous tumor in nude mice was significantly smaller in Hras-shRNA group than in control group.

CONCLUSIONSThe recombinant plasmid HRAS-shRNA could efficiently down-regulate the expression of H-ras gene and protein, induce apoptosis of SACC-M cells and simultaneously inhibit proliferation of these cells in vitro and in vivo.

Animals ; Apoptosis ; Carcinoma, Adenoid Cystic ; genetics ; pathology ; Cell Line, Tumor ; Cell Proliferation ; Female ; Gene Silencing ; Humans ; Mice ; Mice, Inbred BALB C ; Mice, Nude ; Proto-Oncogene Proteins p21(ras) ; genetics ; RNA, Small Interfering ; genetics ; Salivary Gland Neoplasms ; genetics ; pathology ; Transfection

The experimental SD rats were randomly divided into normal control group (Con group),diabetic ulcer model group (DM group) and Celastrol group (Cel group).Except the control group,diabetic ulceration rat models were established by intraperitoneal injection of streptozotocin along with skin scald.And then,each group was treated by spraying the saline solution on the affected skin with (Cel group) or without (Con group and DM group) Cel (q.d.×14 d).Nuclear magnetic resonance (NMR)-based metabonomic analysis was applied to detect metabolic characteristics,accompanied by healing rate calculation and HE and Masson staining to study therapeutic effect of celastrol on accelerated healing of skin wounds of diabetic ulceration rats,which could be used to elucidate therapeutic effects of celastrol on the rat diabetic ulceration and its mechanism.The results showed that celastrol could induce epithelial regeneration of the rat ulcer wound,regulate the infiltration of inflammatory cells and the distribution of collagen fibers,and promote the healing of the ulcer wound.About 20 endogenous potential differential metabolites were screened and identified by partial least square analysis.Metabolic pathway analysis was carried out to show that celastrol can significantly recovery the level of the tricarboxylic acid cycle,promote its energy supply,accelerate the protein synthesis,improve mitochondrial dysfunction and oxidative stress,and accelerate the self-repair ability of skin tissue.Celastrol can promote the healing of ulcers skins of the diabetic rats,which contribute to experimental basis of the drugs for the treatment of diabetic ulcers.

Objective To explore the approach and early effects of endovascular stent-graft deployment in the treatment of portal stenosis of cancerous thrombus.Methods Six cases with portal vein stenosis of cancerous thrombus,which caused by primary hepatic carcinoma(5 cases)and eholangiocarcinoma(1 case)and the severity of stenosis showed on contrast enhanced CT were more than 75% or occluded,were performed percutaneous transhepatie or transsplenic portography.FLUENCY~(TM) endovascular stent-graft(10 mm diameter)was placed at the position of stenosis after gastroesophageal varices embolization.Portal pressure was measured pre-and post-deployment.Results Stents were successfully placed in all patients.The average portal pressure decreased from 50.7 cm H_2O(1 cm H_2O = 0.098 kPa)to 41.3 cm H_2O after endovascular stent-graft deployment.The restenosis were found in 2 cases after one month.Haematemesis and refractory aseites appeared in one case respectively,the other 4 cases showed no significant symptoms above caused by portal hypertension.Conclusion It is safe and feasible for endovaseular stent-graft deployment in the treatment of portal stenosis of cancerous thrombus.Selecting the suitable indications,the symptoms of portal hypertension can be controlled effectively.

Integrative medicine (IM) has attracted increasing attention of the experts and patients around the world. Chinese medicine (CM), as the important part of IM, has played an important role in the treatment of cancer. CM is practiced side by side with Western medicine in many of China's hospitals and clinics. On the basis of the review of the clinical practices and basic researches these years, we introduce the current situation and progress in integrative oncology in China, and show the main feature of CM approach in the cancer treatment. Furthermore, we also discuss the main problems limiting the progress of CM, and point out international collaboration will provide new opportunity to promote the development of IM in China.
China ; Humans ; Integrative Medicine ; Neoplasms ; therapy