Objective　To study the probability of using hepatitis D virus (HDV) ribozyme as a kind of anti-hepatitis-C-virus (HCV) gene thera-py drugs. Methods　The natural HDV genomic ribozyme′s stem Ⅳ was optimized and its substrate-binding region reconstructed, thus three recombinant HCV-specific HDV genomic ribozymes RzC1, RzC2 and RzC3 were obtained. HCV RNA 5'-noncoding region and 5'-fragment of C region (HCV RNA5'-NCR-C) were transcribed from plasmid pHCV-neo by T7 phage RNA polymerase in vitro, and radiolabelled at its 5'-end. The trans-cleaving reaction was performed by mixing the ribozymes and substrate at mol ratio 100∶1 under conditions as follows: 37℃, pH7.5, Mg2+ 20 mmol/L and deionized formamide 2.5 mol/L. Percentage of trans-cleaved products were calculated at different time points and used as the activity indicator of the three ribozymes. Results　RzC1, RzC2 trans-cleaved more substrate when the time extended, and got to 24.9%,20.3% after reac-ting for 90 minutes respectively; RzC3 was not able to trans-cleave its substrate. Conclusion　Recombinant HDV genomic ribozymes have the ability to trans-cleave HCV RNA, but the appropriate target sequence should be selected.

Objective:To explore the status of "socialized hospitalization" of chronic obstructive pulmonary disease (COPD) patients and its influencing factors, and propose constructive coping strategies.Methods:From June 2018 to June 2020, convenience sampling was used to select 256 COPD patients admitted to Hangzhou First People's Hospital as the research object. The self-designed Socialized Hospitalization Status and Influencing Factors Questionnaire was used to investigate patients. Single factor analysis and multivariate Logistic regression analysis were used to analyze the influencing factors of the "socialized hospitalization" of COPD patients.Results:Among 256 COPD patients, 239 effective samples were finally obtained, and 61 cases (25.52%) were "socialized hospitalization". The hospitalization time of patients with "socialized hospitalization" was longer than those with non-"socialized hospitalization", and the difference was statistically significant ( t=16.510, P<0.01) . Hospitalization expenses were higher than those with non-"socialized hospitalization", and the difference was statistically significant ( t=17.820, P<0.01) . The results of single factor analysis showed that there were statistically significant differences in the age, course of illness, type of medical insurance, hospital admission method, hospital-acquired infection, mental status score, dyspnea score, and basic life activity ability in patients with "socialized hospitalization" and non-"socialized hospitalization" ( P<0.05) . The results of multivariate Logistic regression analysis showed that the patient's age, type of medical insurance, hospital admission method, hospital-acquired infection, mental status, dyspnea, and basic life activity ability were the influencing factors of COPD patients' "socialized hospitalization", and the difference was statistically significant ( P<0.05) . Conclusions:Various physiological and pathological conditions and family conditions are the influencing factors of "socialized hospitalization" in COPD patients. The allocation of medical resources should be balanced, the nursing system should be perfected, and the technical level and quality of medical and nursing staff should be improved to ease the pressure of "socialized hospitalization".