Objective:To clone the single chain variable Fv of anti-idiotype monoclonal antibody against vibrio alginolyticus.Methods:Total RNA was extracted from hybridoma cell 2F4 secreting MAb against vibrio alginolyticus and cDNA was amplified by retropolymerase chain reaction(RT-PCR),the expression vector pTAT-AL1 was constructed for the recombinant V_H-V_L expression.The transformed E.coli BL21 cells were propagated and induced by IPTG.Results:The V_H gene contained 369 base pairs and encoded 123 amine acid residues;The V_L gene contained 339 base pairs and encoded 113 amine acid residues;There were four FRs three CDRs and two characteristic cysteine residues in the V_H and V_L gene,respectively.ELISA results showed the ScFv retained almost the same antigen affinity and specificity as its parent monoclonal anitbody.Conclusion:The single chain variable Fv of anti-idiotype monoclonal antibody against vibrio alginolyticus was constructed successfully and expression products was found in the periplasmic space and inclusion bodies.This ScFv might be a new generation of gene engineering vaccine of the anti-idiotype monoclonal antibody against vibrio alginolyticus in fishery.

Objective To explore the correlation between family environment and self-concept of children with attention deficit hyperactivitydisorder (ADHD). Methods Family Environment Scales Chinese Version (FES-CV) and Piers-Harris Children's Self-concept Scale(PHCSS) were used to evaluate 79 children with ADHD and 71 normal children. Results The scores of behavior, intelligence and school,physical appearance, sociability, happiness and satisfaction, and total scores of PHCSS were lower in ADHD group than in normal group (P<0.05). Compared with the normal group, the ADHD group presented lower scores in cohesion, independence, intellectual-cultural orientation,moral religious emphasis, organization (P<0.05) and obviously higher score in conflicts (P<0.01) in FES-CV. The stepwise regressionanalysis showed that moral religion emphasis of FES-CV was a major risk factor to total scores of PHCSS in ADHD children (P<0.05). ConclusionChildren with ADHD show more family dysfunction, which may correlated with their poor self-concept.