The number of chemicals that are synthesized each year has been steadily increasing. Chemicals are of immense benefits to mankind,many of which,however,have a significant negative impact on the environment as well as human health primarily due to their inherent chemistry and toxici?ty. Human exposure to numerous toxic chemicals takes place not only in the environment and but also in the workplace. Therefore,new approaches to toxicology need to developed. A milestone in this regard is the versions of the US National Research Council ″Toxicity Testing in the 21st Century:a Vision and a Strategy ″ and ″Science and Decisions:Advancing Risk Assessment ″. The versions require a radical paradigm shift in the approach to safety assessment and in the traditional procedure where animal experiments used to be the dominating technology. The future of toxicology suggests a new conceptual framework within which in vitro and in silico approaches based on human materials are used to under?stand disease pathways at multiple biological levels that are analogous to adverse outcome pathways in toxicology. This paper focuses on the many challenges and issues that need to be solved in this area.

Objective　To study the change and clinical implications of tumor necrosis(TNF-α) and interleukin-6(IL-6) in the lung cancer patients. Methods　Serum TNF-α and IL-6 level in 55 of lung cancer cases and 40 in normal control group were assayed by ELISA. Results　Serum TNF-α and IL-6 level were significantly higher in the lung cancer patients than in normal control(P<0.01). The activity of TNF-α and IL-6 in serum of the no operational patients (with lymphanode matastasis) was higher than the recurrent patients of post-operation (P<0.01). Conclusion　The activity of serum TNF-α and IL-6 may be associated with development of the lung cancer. The determination of TNF-α and IL-6 levels in serum can help to observe the lung cancer state as a assistant monitor methods.

10 cm respectively from the tumor),the metastatic rate of lymph nodes was 34.7%,2.5% and 1.7%,respectively.The metastatic rate of LN in right colon was significantly higher than that in left colon(52.0% vs 33.8%,P

OBJECTIVE:To explore the effects of Compound Ligusticum chuanxiong drop pill on hemorheology and blood gas in model rats with diabetic nephropathy(DN). METHODS:60 rats were randomly divided into normal control group,model group, positive control group [Irbesartan tablet,0.013 g/(kg·d)] and Compound L. chuanxiong drop pill high-dose,medium-dose,low-dose groups [0.4,0.2,0.1 g/(kg·d)],10 in each group. Except for normal control group,rats in other groups were given high-sugar high-fat feed and intraperitoneally injected streptozotocin to reduce DN model. After 7 d modeling,rats in each group received relat-ed drugs intragastrically,once a day,10 mL/kg;normal control group and model group received equal volume of purified water in-tragastrically. After 64 d,hemorheology indicators [whole blood viscosity(high-shear,medium-shear and low-shear),plasma viscosi-ty,whole blood reduced viscosity] and blood gas indicators(carbon dioxide partial pressure,oxygen partial pressure,hemoglobin content,oxygen saturation,ratio of oxygenated hemoglobin to total protein) of rats were determined,hematoxylin-eosin staining was used to observe the pathological changes in kidney tissue. RESULTS:Compared with normal control group,hemorheology indi-cators and carbon dioxide partial pressure in model group were significantly increased(P<0.05 or P<0.01),oxygen partial pres-sure,hemoglobin content,oxygen saturation,ratio of oxygenated hemoglobin to total protein were significantly decreased(P<0.05 or P<0.01),with severe kidney damage. Compared with model group,except the improvement of carbon dioxide partial pressure, oxygen partial pressure,hemoglobin content in rats were not significant in Compound L. chuanxiong drop pill low-dose group,the above-mentioned indicators in other medicine groups were significantly improved(P<0.05 or P<0.01);the kidney tissue damage was improved to varying degree. CONCLUSIONS:Compound L. chuanxiong drop pill can significantly improve the hemorheology indicators of DN model rats,reduce blood viscosity,improve microcirculation and capacity of the blood to transport oxygen,and has certain improvement effect on kidney tissue morphology of DN rats.

[Objective] To evaluate the value of Fulcrum-bending radiograph and new treatment strategy to the scoliosis with Chiari malformation and/or syringomyelia,and to analyze the effect of operation.[Methods]Eighteen cases suffering from scoliosis with Chiari malformation and/or syringomyelia were divided into 2 groups for surgical treatment.(1)Group 1:six cases had scoliosis with Chiari malformation and/or syringomyelia without obvious neurological impairment.Their scoliosis was corrected with anteroposterior instrumentation afer one week of Halo's traction.(2)Group 2:another 12 patients having similar scoliosis underwent posterior orthopedic operation according to the result of preoperative suboccipital Fulcrum-bending radiograph.[Results]In 6 patients who underwent opration after traction,the average frontal correction rate was 61%.In another 6 cases having soft scoliosis with only posterior operation,the average frontal correction rate was 60%,and the result of opration came close to the Fulcrum-bending radiograph's.But in 6 cases having rigid scoliosis with only posterior operation,the average frontal correction rate was 52%.One patient had nervous lesion and gradually recovered.There existed excessive rectification.[Conclusion]Patients with soft scoliosis with Chiari malformation and/or syringomyelia without obvious neurological impairment can be operated on according to Fulcrum-bending radiograph without preoperative traction,and the therapeutic effect is similar to classic operative result.

Objective To investigate the effects of IL-15 eukaryotic expression plasmid on the Ag-specific immune responses induced by HPV 16 E7 vaccine in mice.Methods An eukaryotic expression plasmid encoding IL-15 gene coding region was constructed and named as pcDNA3.1IL-15.Female BALB/c mice were injected intramuscularly with pcDNA3.1-IL-15 and HPV16 E7 gene vaccine.After the immunization,the concentration of serum IFN-? were tested.Single-cell suspensions of splenocytes were prepared from mice and were re-stimulated with HPV16 E7 protein.Then,the T cell proliferation assay was measured by the MTT method.Results The concentration of serum IFN-? in mice after co-injection with pcDNA3.1-IL-15 and pcDNA3.1-E7 was raised to 414.1pg/ml,which was significantly higher than that of mice co-injected with pcDNA3.1 and pcDNA3.1-E7 or mice injected with pcDNA3.1-E7 only(P

The traditional Chinese medicinal therapy of the eye acupuncture is one of superior microacupuncture therapies which was invented by famous acupuncture professor Peng Jing-shan. Through needling points around the eye, the treatment can treat the diseases of whole body, especially for curing apoplectic paralysis. This article expounded and analyzed the mechanism of eye acupuncture in treating apoplectic paralysis through medical theory, biological holographic theory, modern nerves anatomy and nerves physiology.

It is of great importance that deep learning of computer for the automate identification of the two-dimensional image of Chinese herbal slices is valuable in the application to medicine,production and education.Traditional methods usually extract low-level image features for the identification,but they cannot give robust recognition results under complex backgrounds.Therefore,higher level image representation is necessary in the image identification.A public Chinese herbal medicine database was constructed with 50 common categories and 2,554 images in total,for training and evaluating our recognition model.Then,the sofimax loss function was adopted to train the convolutional neural network model.As a result,the convolutional neural network can achieve the average precision of 70％ under all the 50 medicine herbal classes.In conclusion,convolutional neural network can obtain good results in image identification with complex backgrounds and mutually occluded herbal slices,which has promising potential for future applications.