Preparation and immunological evaluation of oral solution of egg yolk-derived hepatitis B virus-specific transfer factor / 南方医科大学学报

<p><b>OBJECTIVE</b>To prepare the oral solution of egg yolk hepatitis B virus (HBV)-specific transfer factor (EYHBV-TF) and evaluate its immunological activity as an immune regulator against hepatitis B.</p><p><b>METHODS</b>From hens immunized with the Hepatitis B vaccine the egg yolk was isolated to extract the specific transfer factor EYHBV-TF, and its physicochemical properties were examined. Leukocyte adhesion inhibition test (LAI) was performed to detect the immunogenic activity of EYHBV-TF. The solution of EYHBV-TF was then administered orally in normal mice, and the specific cellular immune activity induced was assayed with delayed type skin hypersensitivity test (DTH), with the non-specific immune activity assessed with immune organ index. The immune responses induced by oral EYHBV-STF solution were compared with those by EYHBV-STF injection and by different dosages (injection and oral) of porcine spleen HBV-specific transfer factor (PSHBV-STF), porcine spleen nonspecific transfer factor, and egg yolk extracts from non-immunized hens.</p><p><b>RESULTS</b>The prepared EYHBV-STF oral solution, which met the standards for biological products, could inhibit leukocyte adhesion in vitro and significantly enhance mouse foot pad swelling, demonstrating its capability of transferring antigen-specific delayed type hypersensitivity reactions to naive recipient. EYHBV-STF oral solution also significantly improved the immune organ index in mice (P<0 01) with similar effects to those caused by EYHBV-STF injections and by PSHBV-STF injection and oral solution.</p><p><b>CONCLUSION</b>Orally administered EYHBV-STF and EYHBV-STF injection both possess hepatitis B antigen-specific cellular immune activity and can significantly enhance specific cellular immune responses.</p>

Synthesis of silver carboxymethyl chitosan and its experimental study on its bacteriostasis / 中国生化药物杂志

Purpose　The aim is to develop a synthesis method of the silver carboxymethyl chitosan and to study its bacteriostasis to Staphlococcus aureus(S.aureus),Pseudomonas aeruginusa(P.aeruginusa),Escherichia Coli(E.coli),Klebsiella pneumoniae(K.pneumoniae) and Proteus vulgaris(P.vulgaris).Methods　Chitosan was modified by way of chemistry.The structure analysis of its derivate was analysed by infra-red absorption spectroscopy,using methods of dilution and concavering to study the bacteriostasis to some ordinary bacteria which cause infection in burn.Results　The infra-red spectragram of the derivate showed the chitosan had been modified by chloroacetic acid.When the concentrationl of silver carboxymethyl chitosan was 1.028 mg/ml and the concentration of the five bacteria were 104CFU/ml，the rate of bacteriostasis was 88%、80.2%、75.3% to S.aureus、P.aeruginusa and E.coli respectively.The MIC of silver carboxymethyl chitosan was similar to that of AgNO3 when they act on S.aureus and P.aeruginusa,but the former was lower than later when acting on E.coli.Conclusion　Silver carboxymethyl chitosan could inhibit some bacteria which caused infection in burn.It was a novel pharmaceutical in preventing and curing burn infection.