Objective:To investigate the effect of vitamin E, selenium and quercetin on the expression of zf-9 mRNA of hepatic stellate cells (HSC) during early acute liver injury in rats. Methods:90 healthy SD rats were randomly divided into four groups: normal control, pathological control, VE 20 mg/(kg bw﹒d) + Se 16 ?g/(kgbw﹒d) supplement, and quercetin 50 mg/(kg bw﹒d) supplement through intragastric way for 15 d respectively. The normal control group was injected with normal saline, the others were given intraperitonal CCl4 once to induce acute liver injury model. The serum levels of MDA, SOD, ALT and AST were determined at 3 h, 6 h, 12 h and 24 h after CCl4 injection respectively. The pronase-collagenase perfusion of liver was used to isolate HSC, and the expression of zf-9 mRNA was examined by RT-PCR. Results: Serum levels of MDA were lower in VE+Se supplement group and quercetin supplement group than pathological group. Supplementation with VE+Se and quercetin could decrease the level of ALT and AST and down-regulate the expression of zf-9 mRNA. Conclusion:Dietary supplementation of VE,Se and quercetin could effectively down-regulate the expression of zf-9 mRNA in HSC during early acute liver injury in rats.

Objective To study the distribution of HBV genotypes and the relationship between HBV genotypes and the clinical characteristics in Hangzhou area. Methods The genotype, content of HBV-DNA, serological indicators and AFP were detected by RT-PCR, time resolved immunofluorescence method respectively in 146 cases of HBV-DNA positive patients. The relationship between HBV genotype and the clinical characteristics were analyzed by the statistical analysis.Results In the HBV genotyping, there were 75 cases of type B (51.4%),62 cases of type C (42.5%),9 cases of no B or no C type (6.2%);In type C, the HBV-DNA, HbsAg and HbeAg content were significantly higher than the type B.The content of AFP in type C was higher than type B, but with no statistical difference(P>0.05). Conclusion In Hangzhou area, the priority genotype of HBV is type B. Genotype has a certain relationship with the clinical character-istics and the severity of the disease.

OBJECTIVETo investigate the expression of metastasis-associated in colon cancer-1 (MACC-1) mediated by siRNA, and to study the effects of its downregulation on cell proliferation, cell cycle and invasion ability of cervical cancer SiHa cells.

METHODSMACC-1 siRNA and control siRNA were transfected into cervical cancer SiHa cells, and the expression of MACC-1 protein after transfection with MACC-1 siRNA was detected by Western blotting. The changes of cell proliferation, cell cycle and invasion ability of the SiHa cells were determined by CCK-8 kit, flow cytometry and Boyden chamber assay. The expressions of cell cycle- and invasion-related proteins were analyzed by Western blotting.

RESULTSCompared with the untreated group (0.317 ± 0.023) and control siRNA group (0.309 ± 0.021), the expression of MACC-1 protein was downregulated in the MACC1 siRNA group (0.041 ± 0.006) (P < 0.05), and its downregulation significantly suppressed the cell proliferation, altered the cell cycle distribution and reduced the cell invasion ability of the SiHa cells (P < 0.05). Compared with the untreated group (0.217 ± 0.025 and 0.215 ± 0.024) and the control siRNA group (0.222 ± 0.023 and 0.207 ± 0.027), the expression of cyclin D1 and Cdk2 proteins were significantly decreased in the MACC1 siRNA group (0.076 ± 0.010 and 0.039 ± 0.007) (P < 0.05). Compared with the untreated group (0.099 ± 0.007) and control siRNA group (0.105 ± 0.012), the expression of p21 protein was significantly increased in the MACC1 siRNA group (0.676 ± 0.044) (P < 0.05). The downregulation of MACC-1 expression also evoked a decrease of expressions of MMP-2 and MMP-9 proteins and an increase of E-cadherin protein expression (P < 0.05).

CONCLUSIONSMACC-1 downregulation-mediated inhibition of proliferation and decreased invasion ability of tumor cells may be closely associated with the alterations of expressions of cell cycle- and invasion-related proteins.

Cadherins ; metabolism ; Cell Cycle ; Cell Line, Tumor ; Cell Movement ; Cell Proliferation ; drug effects ; Cyclin D1 ; metabolism ; Cyclin-Dependent Kinase 2 ; metabolism ; Down-Regulation ; Female ; Gene Expression Regulation, Neoplastic ; Gene Silencing ; Humans ; Matrix Metalloproteinase 2 ; metabolism ; Matrix Metalloproteinase 9 ; metabolism ; RNA, Small Interfering ; Transcription Factors ; metabolism ; Transfection ; Uterine Cervical Neoplasms ; metabolism

Objective:To evaluate the outcomes of reconstruction with half of peroneous longus tendon autograft for the treatment of chronic Achilles tendon rupture combined with tendon defects.Methods:A retrospective case series study was conducted on the clinical data of 14 patients with chronic tendon rupture combined with defects admitted to Orthopedic Sports Medicine Center, West China Hospital, Sichuan University from November 2017 to August 2020, including 11 males and 3 females, aged 26-62 years [(42.8±10.7)years]. All the patients underwent Achilles tendon reconstruction with half of peroneus longus tendon autograft. American Orthopedic Foot and Ankle Society (AOFAS) score, Achilles tendon total rupture score (ATRS) and Visual Analogue Scale (VAS) were compared before surgery, at 12 months after surgery and at the last follow-up. At the last follow-up, MRI of the injured ankle was prescribed to evaluate tendon healing; Thomspon test was performed and the patients were asked to do single-leg heel raise; the patients were asked about their conditions in returning to daily life activities and sports. Postoperative complications were observed.Results:All the patients were followed up for 24-47 months [(35±9)months]. AOFAS score, ATRS and VAS at 12 months after surgery were (87.9±6.6)points, (80.9±2.4)points and (2.0±0.3)points respectively, superior to those before surgery [(52.7±16.9)points, (42.0±4.4)points and (4.1±0.4)points respectively] ( P<0.05). The afore-mentioned results at the last follow-up were (95.2±7.2)points, (85.9±2.5)points and (0.8±0.3)points respectively, superior to those at 12 months after surgery ( P<0.05). MRI images of the affected ankle joints showed satisfactory healing of the reconstructed Achilles tendon at the last follow-up. All the patients, being negative in Thompson test at the last follow-up, were able to complete the heel lift on the affected side. All the patients resumed activities of daily living at the last follow-up, among whom 5 resumed to moderate- to high-intensity sports activities, such as basketball sport, and moderate-to high-intensity physical training, 5 resumed light-intensity sports activities such as jogging and swimming, and the other 4 did not resume sports due to fear of re-injury or aging. One patient had delayed wound healing, which was considered gout-related. One patient complained about mild pain at the Achilles tendon in cold weather or after long walks. No re-rupture of the Achilles tendon occurred. No patient complained about discomfort at the graft harvest site, calcaneal valgus or restricted ankle plantar flexion. Conclusions:For patients with chronic Achilles tendon rupture combined with tendon defects, reconstruction with half of peroneous longus tendon autograft facilitates postoperative spinal function recovery and pain alleviation, achieves satisfaction with the returning to daily activity and sports, and has few complications.