Elevated levels of serum immunoglobulin observed in patients with cancers of epithelial origin, including carcinomas of breast, colon, and liver have been interpreted as humoral responses of host to cancer growth. Re...Elevated levels of serum immunoglobulin observed in patients with cancers of epithelial origin, including carcinomas of breast, colon, and liver have been interpreted as humoral responses of host to cancer growth. Recently, Qiu et al described in detail that human cancers of epithelial origin, including carcinomas of breast, colon, liver, lung, established epithelial cancer lines, produce immunoglobulin G （IgG） in their cytoplasm. Under normal conditions, heat shock proteins （HSPs） have multiple cellular functions, such as folding and translocating newly synthesized proteins. When a cell is injured or under stress, HSPs refold damaged protein or facilitate degradation of proteins. In most cancers, heat shock proteins can capture tumour specific peptide to inhibit the growth of cancer. This study demonstrated that human IgG and HSPs are co-localized in hepatocellular carcinoma.展开更多
Objective Preliminary assessment of rabies virus neutralizing activity,safety and immunogenicity of a recombinant human rabies antibody(NM57)compared with human rabies immunoglobulin(HRIG)in Chinese healthy adults.Met...Objective Preliminary assessment of rabies virus neutralizing activity,safety and immunogenicity of a recombinant human rabies antibody(NM57)compared with human rabies immunoglobulin(HRIG)in Chinese healthy adults.Methods Subjects were randomly(1:1:1)allocated to Groups A(20 IU/kg NM57),B(40 IU/kg NM57),or C(20 IU/kg HRIG).One injection was given on the day of enrollment.Blood samples were collected on days-7 to 0(pre-injection),3,7,14,28,and 42.Adverse events(AEs)and serious AEs(SAEs)were recorded over a period of 42 days after injection.Results All 60 subjects developed detectable rabies virus neutralizing antibodies(RVNAs)(>0.05 IU/mL)on days 3,7,14,28,and 42.The RVNA levels peaked on day 3 in all three groups,with a geometric mean concentration(GMC)of 0.2139 IU/mL in Group A,0.3660 IU/mL in Group B,and0.1994 IU/mL in Group C.At each follow-up point,the GMC in Group B was significantly higher than that in Groups A and C.The areas under the antibody concentration curve over 0-14 days and 0-42 days in Group B were significantly larger than those in Groups A and C.Fifteen AEs were reported.Except for one grade 2 myalgia in Group C,the other 14 were all grade 1.No SAEs were observed.Conclusion The rabies virus neutralizing activity of 40 IU/kg NM57 was superior to that of 20 IU/kg NM57 and 20 IU/kg HRIG,and the rabies virus neutralizing activity of 20 IU/kg NM57 and 20 IU/kg HRIG were similar.Safety was comparable between NM57 and HRIG.展开更多
The fluorogenic property of guaiacol was exploited for the first time to analyze the interaction with target protein as a probe by molecular modeling, fluorescence, circular dichroism (CD) and Fourier transform infrar...The fluorogenic property of guaiacol was exploited for the first time to analyze the interaction with target protein as a probe by molecular modeling, fluorescence, circular dichroism (CD) and Fourier transform infrared (FT-IR) spectroscopy. Molecular docking was performed to reveal the possible binding mode or mechanism and suggested that guaiacol can strongly bind to human immu- noglobulin (HIgG). It is considered that guaiacol binds to HIgG mainly by a hydrophobic interaction and there are two hydrogen bond interactions between the drug and the residues LEU 80 and ASP 65, which is in good agreement with the results from the experimental thermodynamic parameters (the enthalpy change △H0 and the entropy change △S0 were calculated to be 65.55 kJ·mol-1 and 132.95 J·mol-1·K-1 according to the Vant’ Hoff equation). Data obtained by the fluorescence spectroscopy indicated that binding of guaiacol with HIgG leads to dramatic enhancement in the fluorescence emission intensity along with significant occurrence of efficient Frster resonance energy transfer (FRET) from the residue of HIgG to the protein bound guaiacol. From the low value of fluorescence anisotropy (r = 0.06), it is argued that the probe molecule is located in the motionally unrestricted environment of the protein. The alterations of protein’s secondary structure in the presence of guaiacol in aqueous solution were quantitatively calculated by the evidences from FT-IR and CD spectroscopes.展开更多
目的探讨静脉注射人免疫球蛋白(intravenous infusion of human immunoglobulin,IVIG)对川崎病(Kawasaki disease,KD)患儿冠状动脉(冠脉)病变发生的影响。方法选择2019年1月至2022年5月在东莞市妇幼保健院住院确诊并治疗的KD患儿,根据...目的探讨静脉注射人免疫球蛋白(intravenous infusion of human immunoglobulin,IVIG)对川崎病(Kawasaki disease,KD)患儿冠状动脉(冠脉)病变发生的影响。方法选择2019年1月至2022年5月在东莞市妇幼保健院住院确诊并治疗的KD患儿,根据有无冠脉病变将患儿分为无冠脉病变组和冠脉病变组。对两组患者的发热时间、IVIG治疗时的病程时间、白细胞、血红蛋白、血小板、C反应蛋白、降钙素原、离子、肝及肾功能等临床资料进行分析。结果KD合并冠脉病变组患者血白细胞、血小板计数高于无冠脉病变组,而白蛋白、羟基酸脱氢酶浓度低于无冠脉病变组,差异均有统计学意义(P<0.05)。KD发热时间<8 d患儿的冠脉病变发生率低于发热时间>10 d的患儿,差异有统计学意义(P<0.05)。病程第5天前应用IVIG治疗患者冠脉病变发生率与病程第7天、第8天及10天后治疗患者比较,差异有统计学意义(P<0.05)。病程第5天及第6天应用IVIG治疗患者的冠脉病变发生率低于病程第10天后应用的患者,差异有统计学意义(P<0.05)。结论应用IVIG时间过晚,白细胞、血小板计数升高,发热时间较长是KD患儿并发冠脉病变的危险因素,而白蛋白、羟基酸脱氢酶浓度的降低也可作为KD并发冠脉病变的预测指标。热程少于8 d,病程7 d内应用IVIG治疗,可减少冠脉病变发生率。展开更多
文摘Elevated levels of serum immunoglobulin observed in patients with cancers of epithelial origin, including carcinomas of breast, colon, and liver have been interpreted as humoral responses of host to cancer growth. Recently, Qiu et al described in detail that human cancers of epithelial origin, including carcinomas of breast, colon, liver, lung, established epithelial cancer lines, produce immunoglobulin G （IgG） in their cytoplasm. Under normal conditions, heat shock proteins （HSPs） have multiple cellular functions, such as folding and translocating newly synthesized proteins. When a cell is injured or under stress, HSPs refold damaged protein or facilitate degradation of proteins. In most cancers, heat shock proteins can capture tumour specific peptide to inhibit the growth of cancer. This study demonstrated that human IgG and HSPs are co-localized in hepatocellular carcinoma.
基金supported by 2021 Beijing Key Specialty Program for Major Epidemic Prevention and Control。
文摘Objective Preliminary assessment of rabies virus neutralizing activity,safety and immunogenicity of a recombinant human rabies antibody(NM57)compared with human rabies immunoglobulin(HRIG)in Chinese healthy adults.Methods Subjects were randomly(1:1:1)allocated to Groups A(20 IU/kg NM57),B(40 IU/kg NM57),or C(20 IU/kg HRIG).One injection was given on the day of enrollment.Blood samples were collected on days-7 to 0(pre-injection),3,7,14,28,and 42.Adverse events(AEs)and serious AEs(SAEs)were recorded over a period of 42 days after injection.Results All 60 subjects developed detectable rabies virus neutralizing antibodies(RVNAs)(>0.05 IU/mL)on days 3,7,14,28,and 42.The RVNA levels peaked on day 3 in all three groups,with a geometric mean concentration(GMC)of 0.2139 IU/mL in Group A,0.3660 IU/mL in Group B,and0.1994 IU/mL in Group C.At each follow-up point,the GMC in Group B was significantly higher than that in Groups A and C.The areas under the antibody concentration curve over 0-14 days and 0-42 days in Group B were significantly larger than those in Groups A and C.Fifteen AEs were reported.Except for one grade 2 myalgia in Group C,the other 14 were all grade 1.No SAEs were observed.Conclusion The rabies virus neutralizing activity of 40 IU/kg NM57 was superior to that of 20 IU/kg NM57 and 20 IU/kg HRIG,and the rabies virus neutralizing activity of 20 IU/kg NM57 and 20 IU/kg HRIG were similar.Safety was comparable between NM57 and HRIG.
文摘The fluorogenic property of guaiacol was exploited for the first time to analyze the interaction with target protein as a probe by molecular modeling, fluorescence, circular dichroism (CD) and Fourier transform infrared (FT-IR) spectroscopy. Molecular docking was performed to reveal the possible binding mode or mechanism and suggested that guaiacol can strongly bind to human immu- noglobulin (HIgG). It is considered that guaiacol binds to HIgG mainly by a hydrophobic interaction and there are two hydrogen bond interactions between the drug and the residues LEU 80 and ASP 65, which is in good agreement with the results from the experimental thermodynamic parameters (the enthalpy change △H0 and the entropy change △S0 were calculated to be 65.55 kJ·mol-1 and 132.95 J·mol-1·K-1 according to the Vant’ Hoff equation). Data obtained by the fluorescence spectroscopy indicated that binding of guaiacol with HIgG leads to dramatic enhancement in the fluorescence emission intensity along with significant occurrence of efficient Frster resonance energy transfer (FRET) from the residue of HIgG to the protein bound guaiacol. From the low value of fluorescence anisotropy (r = 0.06), it is argued that the probe molecule is located in the motionally unrestricted environment of the protein. The alterations of protein’s secondary structure in the presence of guaiacol in aqueous solution were quantitatively calculated by the evidences from FT-IR and CD spectroscopes.
文摘目的探讨静脉注射人免疫球蛋白(intravenous infusion of human immunoglobulin,IVIG)对川崎病(Kawasaki disease,KD)患儿冠状动脉(冠脉)病变发生的影响。方法选择2019年1月至2022年5月在东莞市妇幼保健院住院确诊并治疗的KD患儿,根据有无冠脉病变将患儿分为无冠脉病变组和冠脉病变组。对两组患者的发热时间、IVIG治疗时的病程时间、白细胞、血红蛋白、血小板、C反应蛋白、降钙素原、离子、肝及肾功能等临床资料进行分析。结果KD合并冠脉病变组患者血白细胞、血小板计数高于无冠脉病变组,而白蛋白、羟基酸脱氢酶浓度低于无冠脉病变组,差异均有统计学意义(P<0.05)。KD发热时间<8 d患儿的冠脉病变发生率低于发热时间>10 d的患儿,差异有统计学意义(P<0.05)。病程第5天前应用IVIG治疗患者冠脉病变发生率与病程第7天、第8天及10天后治疗患者比较,差异有统计学意义(P<0.05)。病程第5天及第6天应用IVIG治疗患者的冠脉病变发生率低于病程第10天后应用的患者,差异有统计学意义(P<0.05)。结论应用IVIG时间过晚,白细胞、血小板计数升高,发热时间较长是KD患儿并发冠脉病变的危险因素,而白蛋白、羟基酸脱氢酶浓度的降低也可作为KD并发冠脉病变的预测指标。热程少于8 d,病程7 d内应用IVIG治疗,可减少冠脉病变发生率。
