Osteosarcoma is the most common primary malignant tumor that develops in bone. Since chemotherapy was introduced into the multi-modality treatment regimen for high-grade osteosarcoma, its prognosis has been impressively improved; about two-thirds of all patients could achieve long-term survival. This review summarized the history of chemotherapy for osteosarcoma and current chemotherapeutic treatment strategies for classical osteosarcoma. The review also emphasized the necessity that the patients should be treated in specialized centers and prospective, multi-institutional trials are needed.

Objective To investigate the effect of compound preparation of Astragalus mongho-licus on subsets of lymphocytes in patients with myasthenia gravis (MG), and to explore its regulatory mechanism. Methods 60 MG patients were randomly divided into test group (n=30, given compoundpreparation of Astragalus mongholicus for 12 wks) and control group (n=30, given prednisone tablets for 12 wks). Flow cytometry was applied to examining the distribution change of the subsets of lym-phocytes in patients before and after treatment. Results After treatment, the percentages of CD4+ T cells and the ratio of CD4+/CD8+ in both groups decreased compared with those before treatment.The ratio of CD4+/CD8+ in test group was significantly lower than that in control group (P<0.05).The percentage of CD8+ T cells in test group after treatment increased significantly (P<0.05) com-pared with that before treatment, but had no significant difference compared with that in control group(P>0. 05). Conclusion The result from the current study suggests that one of the mechanisms of the compound preparation of Astragalus monghoticus regulating immune response may be achieved through its modulating effect on the distribution of subsets of lymphoeytes and humoral immune func-tion.

Automatic Data Processing ; Humans ; Medicine, Chinese Traditional ; Pulse

Most of the soil microorganisms are unculturable,which limits the exploitation and application of microbial resources.Metagenomics has great potential in the research of unculturable microorganisms in soil.Progress on the research of metagenomic DNA purification,metagenomic library construction and screening of soil microorganisms are reviewed briefly.

Acrolein ; poisoning ; Humans

2000 fold). In bystander effect experiment, the death rate of mixed cells was still over 50% even when they contained only 20% TK+ target cells. Fourteen days after nude mice bearing tumors were treated i.p. with GCV, the mean weight and volume of transfected tumors were less than those of untransfected tumors (P

To investigate the effects of brachial plexus block(BPB) and satellite ganglion block(SGB) on the blood flow of upper limb, 22 patients were randomly divided into two groups,and given BPB(group A,n=11) or SGB(group B,n=11) with 1% lidocaine 10 ml every other day for 5 times. Ulnar-radial artery blood flow was measured by using a TCD 30 minutes before and after the block. Finger pulse amplitude was measured by pulse oximeter 5,10,15,20,30 minutes after the block.The average increase in ulnar-radial artery blood flow was 13 cm/s in group A and 5 cm/s in group B. Finger pulse amplitude increased by (904?212)mm in group A and(354?142)mm in group B.A significant difference was observed between the two groups (P

To assess the roles of glutamate and its ionotropic receptor in processing noxious sensory input from dental pulp,glutamate NMDA receptor subtype antagonist,MK-801 and non-NMDA receptor subtype antagonist,CNQX were administrated separately into left lateral cerebral ventricle prior to exposing pulp cavity of left maxillary first molar tooth.The number of Fos-positive neurons in medulla oblongata was measured and compared with that of the group with simple exposure of dental after same survival time pulp.Fos protein expression was reduced dose-dependently by an administration of MK-801,but CNQX had little effect.The results showed that glutamate may be an excitatory transmitter of noxious dental pulp sensory input to neurons in medulla oblongata.In pain nodel of mechanical exposing dental pulp,NMDA receptor subtype has an important role in this process.

Objective To investigate the expression of spleen tyrosine kinase (Syk) in endometrial cancer ( EC ) and its relationship with the clinic and pathological factors , as well as the diagnostic value for EC . Methods Through real-time PCR and immunohistochemistry, the expression level of Sky mRNA and protein in normal endometrial tissues, atypical hyperplasia of endometrial tissues and endometrial cancer tissues were examined. Results The expression of Syk in EC were lower than that in endometrial atypical hyperplasia and normal endometrium (P < 0.05). The expression of Syk was related to histological grade, invasive depth, lymphatic metastasis and clinical stages (P<0.05). Conclusion Syk contributes to tumorigenesis and metastasis of EC. The detection of Syk can provide evidence to evaluate the malignancy grade of EC.

Objective To study the diagnostic value of repetitive nerve stimulation test in myasthenia gravis. Method The repetitive nerve stimulation test was performed at axillary nerves, ulnar nerves and facial nerves in 36 patients with myasthenia gravis which treated in our hospital from 1996. 10 to 1999. 10. 108 nerves were tested. Result The RNS test positivity rate of amplitude decrement in 108 nerves was 60. 2% ( 65 nerves). Among them, the highest(77. 8% )positivity rate was deltoid mucle supported by axillary nerve, the lowest(41.7% ) was abductor digiti minimi mucle supported by ulnar nerve. There were 31 cases(86. 1% ) had one or more than one nerves with positive results in 36 patients. The best stimulation frequancy were 3 ～ 5 Hz. Conclusion Stimulate the axillary nerve, facial nerve and ulnar nerve in the same patient, would improve the RNS positivity rate in diagnosis of MG.