The effects of rapamycin on the expression of Bcl-2 and Bax protein in in vitro cultured human lens epithelial cells (LECs) and cell cycle were investigated in order to provide the theoretical basis for the development of new inhibitory drugs for clinical prevention and treatment of after-cataract. The cultured LECs of second and third passages were collected and treated with rapamycin. The LECs were transferred into 96-well culture plates and divided into 6 groups, and each group was set to have 8 duplicate wells. In the negative control group, the LECs were given culture medium only, and in the blank control group, only culture medium was given. In the four rapamycin-treated groups, different concentrations (20, 40, 60 and 80 ng/mL) of rapamycin were given. After treatment for 24, 48 and 72 h, the absorbance (A) values in each well were determined by MTT assay. The cell cycles of all groups were detected by using flow cytometry. Real-time fluorescent quantitative polymerase chain reaction (RFQ-PCR) and Western blot were used to detect the mRNA and protein expression of Bcl-2 and Bax respectively. MTT assay showed that rapamycin could inhibit proliferation of LECs in a time- and dose-dependent manner. Flow cytometry revealed that rapamycin could block the conversion of LECs from G1 phase to S phase, resulting in the increase of cells in G(1) phase and the decrease of the cells in S phase. RFQ-PCR indicated that rapamycin could down-regulate the expression of Bcl-2 mRNA, but up-regulate the expression of Bax mRNA, suggesting it could induce apoptosis of LECs. Western blot demonstrated that rapamycin could suppress the expression of Bcl-2 protein, but promote the expression of Bax protein. It is concluded that rapamycin could inhibit proliferation of LECs probably not only by blocking the progression of cell cycle, but also by promoting the induction of apoptosis.

Objectives To study the relationship between serum HBV DNA and HBsAg, HBcAg expression in the hepatocytes in chronic hepatitis B(CHB) patients. Methods Quantitative polymerase chain reaction was used to assay the content of serum HBV DNA in 170 CHB patients. The expression of HBsAg and HBcAg in hepatocyctes was detected by immunohistochemical staining using liver biopsy. Results Although serum HBV DNA was negative, the expression of HBsAg in hepatocyctes was still observed in the CHB patients. In the CHB patients with lower level of serum HBV DNA, the positive rate of HBsAg expression in hepatocyctes was also lower (P

Objective To investigate the NAT(nucleic acid amplification technique)-HBV/HCV results among single ALT(+)blood donors,in order to provide theoretical basis of optimizing strategy for blood screening.Methods A total of 28 800 samples,from December 2006 to December 2007,were studied retrospectively.ALT was tested by rate method.HBV-DNA and HCV-RNA in single ALT(+) samples were detected via NAT-HBV/HCV.The relationship between positive ALT values and ELSIA-HBV/HCV OD values was analyzed.Results A total of 2 516 ALT(+) cases were found in 28 800 samples.Of these ALT(+)cases,8 positive cases were found via NAT-HBV/HCV,including 5 HBV-DNA(+) and 3 HCV-RNA(+) cases.The positive rates of NAT-HBV/HCV for the donors with ALT values ≤80 U/L were significant lower than those with ALT values≥81 U/L(P

Objective:To investigate the clinical efficacy and safety of biopolysaccharide colloidal solution (Shutaishu) in the prevention of intestinal adhesion after abdominal surgery.Methods:A total of 100 patients scheduled to undergo abdominal surgery in Quzhou Municipal Hospital of Traditional Chinese Medicine from February to October in 2019 were included in this study. They were randomly divided into an observation group and a control group, with 50 patients in each group. Before closing the abdomen after surgery, abdominal cavity and wound were flashed with Shutaishu and 0.9% sodium chloride injection in the observation and control groups, respectively. The recovery of gastrointestinal function, intestinal adhesion, abdominal pain and the incidence of complications were compared between the observation and control groups.Results:The time to first regular bowel sound [(28.81 ± 5.56) h], time to first passage of flatus [(36.34 ± 6.24) h], time to first defecation [(41.65 ± 8.77) h], time taken for walking [(3.78 ± 0.64) d] in the observation group were significantly shorter than those in the control group [(32.75 ± 5.15) h, (41.51 ± 6.84) h, (48.05 ± 9.81) h, (4.27 ± 0.69) d, t = 3.68, 3.95, 3.89, 3.68, all P < 0.001]. At 5 and 30 days after surgery, the incidence of intestinal adhesion in the observation group [10.0% (5/50), 12.0% (6/50)] was significantly lower than that in the control group [26.0% (13/50), 30.0% (15/50), χ2 = 4.34, 4.88, both P < 0.05]. The total incidence of postoperative complications in the observation group was significantly lower than that in the control group [26.0% (13/50) vs. 54.0% (27/50), χ2 = 8.17, P < 0.05]. With time, visual analogue scale score was significantly decreased in both groups ( t = 3.51, 6.18, both P < 0.05). At 1, 3 and 5 days after surgery, visual analogue scale score in the observation group was significantly lower than that in the control group ( t = 4.07, 4.95 and 8.02, all P < 0.05). Conclusion:Biopolysaccharide colloidal solution is of high clinical value in the prevention of intestinal adhesion after abdominal surgery because it can promote the recovery of gastrointestinal function and early functional exercise, and has no obvious adverse reactions and complications.

AIM To investigate the anti oxidation activities of new systhesized nitroxides in liver, liver mitochondria and RBC from rats and in egg phospholipid. METHODS The homogenates of liver, liver mitochondria from rats and the suspensions of egg phospholipid were used to determine malondialdehyde (MDA) formation induced by Fe 2+ Vit C system using TBA colorimetric method. H 2O 2 caused hemolysis was measured spectrometrically. Superoxide anion was assayed spectrometrically. RESULTS Nitroxides A, B with one active group (NO?) could inhibit MDA generation caused by ?OH generation system significantly, antagonized hemolysis induced by H 2O 2, but did not affect O ? 2 formation; Nitroxide C with two active group (NO?) possessed similar potent anti lipoperoxidative activities,IC 50

AIM: To explore the pathophysiological mechanism of postmenopausal osteoporosis, we established an animal model for postmenopausal osteoporosis and investigated the loss of bone mass.METHODS: Thirty-one female SD rats (three months old) were randomly divided into two groups: sixteen ovariectomized (OVX) and fifteen sham-operated group as control. At post-operated day 28, seven rats of either OVX group or sham-operated group were sacrificed. At post-operated day 56, the rest of either were sacrificed. The wet weight of the uteruses were measured and the changes of bone micro-architecture were studied by bone mineral density (BMD) and the data of bone histomorphometry. RESULTS: Compared with the sham group, the mean wet weight and the bone density of proximal tibia 1/3 section of the OVX group was significantly decreased (P

With the development of systemic therapy for the treatment of breast cancer, the incidence of brain metastases from breast cancer is gradually increasing. Treatment with surgery,stereotactic radiosurgery, and wholebrain radiotherapy (WBRT) are still the first-line therapies for the majority of patients with brain metastases. Recently, chemotherapy, hormone therapy and targeted therapy have been widely used for breast cancer. This review summarizes the efficiency of those strategies for the breast cancer patients with brain metastases.

Objective To study the feasibility and effectiveness of liquid embolic agent HEMA-MMA in the arterial embolization therapy for the rabbit renal VX2 tumor models. Methods Renal VX2 tumor models were inoculated with the method of percutaneous CT-guided implantation of a small fragment of tumor into the inferior pole of the right kidney and were embolized when the max diameter was 1.5 cm. One model was embolized with the mixture of HEMA-MMA and carbonyl iron powder and was harvested immediately after embolization, the sample was fixed by paraformaldehyde for histopathological examination with methylene blue staining and HE staining to demonstrate the sizes of the vessels that the HEMA-MMA could reach. The remaining models were treated with pure HEMA-MMA by superselective or nonselective embolization (SSE or NSE). In SSE group, only the renal artery branch supplying the tumor was superselectively catheterized and embolized until the presence of“artery casting”change. In NSE group, the microcatheter was catheterized into the main renal artery then the whole renal artery branches and the renal capsular artery were embolized simultaneously until the presence of“artery casting”shape. Non-enhanced CT scans at immediate postoperation, on postoperative day 1 and day 3 were performed. The enhanced CT scans at the postoperative 1, 2 , 4 and 6 weeks were performed. Necrotic zone of the tumor was defined as non-enhancement in parenchyma phase, residual tumor was defined as delayed enhancement around the necrotic zone or obvious thickness and enhancement of the adjacent renal capsule. When detecting residual tumor, the model was followed up another 1 week and then harvested for histopathological examination. If there was no residual tumor and lung metastasis in 6 weeks follow-up after operation, we defined this as complete necrosis and then harvested the kidney for histopathological examination. Results Eleven of the 12 rabbits were successfully inoculated VX2 tumors. The mixture of HEMA-MMA and carbonyl iron powder deposited in the arterial vessels demonstrated mazarine in methylene blue staining and brownness in HE staining. The diameter of the tumor vessels which the agent could reach was 30—150 μm, there was no embolic agent detected in the venous blood vessels. 5 models were performed with superselective embolization and the other 5 were embolized with nonselective embolization. The embolic agent demonstrated high density and obviously deposited in the surrounding zone of the tumor on immediate postoperative CT images, density of the surrounding zone decreased accompanied by density increase in the central area of the tumor on the first day postoperative CT images. Density difference between the embolism zone and normal renal tissue disappeared on the third day postoperative CT images accompanied by swelling changes of the embolized area. Residual tumor was detected in all 5 superselectively treated cases (2 in 1 week, 3 in 2 weeks), which located in the area of junctional zone and subrenal capsule. The necrotic zone was demonstrated coagulative necrosis on histopathologic images, the boundary between the residual tumor and the necrotic zone was clearly showed both on histopathologic images and gross specimen. Renal capsular artery participating in the residual tumor blood supply was also shown on gross specimen. There was no residual tumor and lung metastasis detected in nonselective treated group during the period of 6 weeks follow-up. Atrophy of the whole tumor-burdened kidney was shown on gross specimen and complete coagulative necrosis of the total tumor and the renal capsule adjacent to the tumor was demonstrated on histopathologic images. Conclusions Liquid embolic agent HEMA-MMA can embolize tumor blood vessels with a diameter of 30—150 μm. The renal capsular artery participates in the blood supply of the VX2 kidney tumor, so only superselective embolization of the renal artery branch with this liquid embolic agent may not induce the whole necrosis of the tumor, but complete necrosis of the tumor can be obtained by embolizing of all the tumor vessels and the adjacent normal renal arteries with this liquid embolic agent.

Objective To evaluate the feasibility of interventional catheterization via saphenous artery route in treating hepatic and renal lesions, to compare its advantages and disadvantages with trans-femoral approach catheterization, and to discuss the feasibility of using saphenous artery route to replace femoral artery approach.Methods A total of 24 rabbits bearing VX2 liver and kidney tumor were randomly divided into via femoral artery catheterization group (control group,n=8) and via saphenous artery catheterization group (study group,n=16). Surface distribution and variation of saphenous artery were recorded. After the saphenous artery was isolated, blood vessel was punctured with a 22 G needle, through which a 0.018 inch micro guide wire together with a 5-F micro catheter sheath was inserted into the artery, then, a Y-valve was connected to the sheath. DSA was performed to determine the diameters of the saphenous artery, femoral artery and iliac artery. The used time for isolating the artery and indwelling the sheath, the depth of sheath insertion, the success rate of catheterization, the incision infection rate and the occurrence of claudication in both groups were recorded, and the results were compared. Results Saphenous artery could be clearly observed on body surface in 91.67%of rabbits (22/24). Successful insertion of catheter sheath was achieved in all rabbits of both groups. The used time of isolating artery, the depth of sheath insertion, the incision infection rate and the occurrence of claudication at 7 and 14 days after the treatment in the study group were(367.30±37.30) seconds, (20.20±2.60) mm, 0%, 6.25%and 0%respectively, while those in the control group were (978.20±156.30) seconds,(58.60±9.50) mm, 37.50%, 62.50% and 25% respectively. The differences in above mentioned measurement items between the two groups were statistically significant (P<0.05). The used time of indwelling the sheath and the occurrence of claudication at one day after the treatment in the study group and in the control group were (42.80 ±9.90) seconds, 70% and (43.60 ±7.0) seconds, 100%respectively, and no statistically significant differences existed between the two groups (P>0.05). The diameters of the saphenous artery, superficial femoral artery, common femoral artery, external iliac artery and common iliac artery were (1.29±0.12) mm,(1.91±0.27) mm, (2.18±0.15) mm, (2.22±0.13) mm and(2.39± 0.15) mm respectively. Conclusion In rabbits, the saphenous artery is usually superficially located, its anatomical variation rate is very low, and its internal diameter can match 5- F micro catheter sheath. Catheterization via saphenous artery is convenient, time-saving with less damage and fewer complications. Therefore, in treating hepatic and renal lesions in rabbits the catheterization via saphenous artery can be used as the technique of first choice to replace the femoral approach catheterization.

Objective:To map dominant antigenic determinants on SAK by gene-targeted fragmemt library . Methods:①The PcAbs specificly against SAK were produced by immunning BALB/C mice. Pu rified the antisera through a SAK-Sepharose 4B affinity chromatography column. The purified PcAbs were biotinylated for next step. ② After constructing SAK r andom epitope library we sequenced 12 isolated clones randomly to ensure its int egrity ,capability and randomness.③The library was screening by situ-clone hy bridization.④Constructed mSAK ,the A1 region deleted mutant of SAK ,and used Western-blot assay to identified its immunoreactivity. Results:①Got a dominant epitope at amino acid 71-89,called A1 region; ②Western-bl ot assay suggested that mSAK, a mutant SAK without A1 region., didn't combine to the anti-SAK PcAbs.Conclusion:A dominant epitope of SAK was mapped successfully with a simple,effective method . [