Objective To investigate the efficacy of 3D conformal radiotherapy for late-stage pancreatic cancer and determine relavent prognostic factors.Methods Fifty patients with advanced pancreatic cancer were divided into 3 groups according to treatment planning: palliative radiotherapy (group A) at 10.8-56 Gy, radiotherapy alone (group B) at 8-60.5 Gy and concurrent chemoradiother-apy (group C) at 10-64 Gy.All patients received 3D-conformal radiotherapy, and smaller multiple ports were used for palliative treatment whereas large fields including pancreatic tumors and adjacent lymph node drainage system were adopted in the beginning of radiotherapy.Concurrent chemotherapy with gemcitabine (200-600 mg/m~2) alone was used with weekly protocol.Results The duration of follow-up was 3-35 months.Forty three patients died during the follow-up for multiple metastasis, de-teriation, secondary infection and hemorrhage.Among the seven surviving patients, 3 received concur-rent radiotherapy, 3 radiotherapy alone and 1 palliative radiotherapy.Only 1 patient was alive in group A.However, the symtoms were relieved in 46% of the patients.The median survival time was 5.07 months whereas it was 4.33 months for patients received less than 45 Gy and 7.33 months for patients received 45 Gy or more.Three patients were alive in group B and the symptoms were relieved in 81% of the patients.The median survival time was 6.65 months whereas it was 4.36 months for patients received less than 45 Gy and 8.33 months for patients received 45 Gy or more.Three patients were a-live in group C and the symptoms were relieved in 89% of the patients.The median survival time was 9.89 months.One patient survived for 3 months after 8 Gy irradiation.The median survival time was 10.73 months for patients received 45 Gy or more.Conclusion 3D-conformal radiotherapy is safe and effective in treatment of advanced pancreatic cancer.The symptom relieving rate and median survival time seem to be related to patient's status, extent of disease, choice of treatment and irradiation dos-age.3D-confromal concurrent chemoradiotherapy leads to the longest survival time in some patients.

Objective To clone cDNA encoding troponin T of Schistosoma japonicum(SjTnT),and evaluate the protective efficacy induced by recombinant SjTnT in BALB/c mice against S. japonicum challenge infection. Methods The SjTnT gene was amplified from 28-day-schistosome cDNAs by PCR and then subcloned into pET28a(+). The recombinant SjTnT protein (rSjTnT)was expressed in Escherichia coli BL21(DE3)cells. The serum specific to rSjTnT was prepared by immunized BALB/c mice with the recombinant antigen,and the immunogenicity of rSjTnT was detected by Western blotting and ELISA. The immuno-protective efficacy induced by rSjTnT in BALB/c mice was evaluated according to the reduction in worm and egg counts. Results The cDNA encoding SjTnT was successfully cloned and expressed in E. coli. Western blotting showed that rSjTnT had a good immunogenicity. The high level of specific IgG antibodies was detected,and 33.89% worm reduction and 43.94% liver egg reduction were obtained in mice vaccinated with rSjTnT combined with Seppic 206 adjuvant compared with those in the adjuvant control group. Conclusions rSjTnT could induce partial immuno-protection against S. japonicum infec-tion in BALB/c mice. This study provided a basic for understanding the biological function of SjTnT.

ObjectiveTo investigate the intervention effect of Qufeng Gutong Babu ointment （QFGT） on rats with osteoarthritis （OA） with cold-dampness obstruction， and preliminarily clarify its mechanism. MethodSD male rats were divided into 6 groups， namely， the blank group， model group， positive control drug Huoxue Zhitong ointment （HXZTG） group （1.26 cm²·d^-1）， and low， medium， and high-dose QFGT group （75， 150， 300 mg·d^-1）. OA model was prepared by joint cavity injection of papain and L-cysteine. On the second day of modeling， climate factors were applied to establish an animal model of combination of disease and syndrome of OA rats with cold-dampness obstruction. Standard VonFrey fiber was used to evaluate the threshold of mechanical pain. Weight bearing difference score and joint function score of both hind limbs were recorded. Hematoxylin-eosin （HE） staining and safranine fixation green staining were used to observe the pathological changes and cartilage degeneration of rat knee joint. Immunohistochemistry （IHC） was used to detect the expression of interleukin-1β （IL-1β）， interleukin-8 （IL-8）， tumor necrosis factor-α （TNF-α）， matrix metalloproteinase-9 （MMP-9）， and cathepsin K （CTSK）. Western blot was used to detect the protein expression of kinase B （Akt）， phosphorylated protein kinase B （p-Akt）， phosphatidylinositol 3-kinase （PI3K）， nuclear factor 1 （NFATc1）， MMP-9， and CTSK in T cells. ResultCompared with the normal group， the model group showed significant mechanical pain sensitivity reaction after modeling （P<0.01）， and the weight bearing difference of both hind limbs and joint function score were significantly increased （P<0.05， P<0.01）. Compared with the model group， both the high-dose QFGT group and the HXZTG group significantly reduced the mechanical pain sensitivity， weight difference， and joint function score of rats （P<0.05， P<0.01）， and the medium-dose QFGT group also improved the joint function to a certain extent， and the degeneration of the knee joint cartilage of rats was significantly reduced （P<0.05， P<0.01）. QFGT and HXZTG both inhibited the protein expression of IL-1β， IL-8， TNF-α， MMP-9， CTAK， PI3K， p-Akt， Akt， and other related proteins in articular cartilage of rats with OA to a certain extent （P<0.05， P<0.01）. ConclusionQFGT can inhibit the release of inflammatory factors and matrix metalloproteinases by inhibiting the PI3K/Akt signal pathway in articular articular cartilage of rats with OA with cold-dampness obstruction， thus ultimately weakening local cartilage degeneration and improving joint function.