Periodontal disease is the leading cause of tooth loss,which is also a high-risk factor for other diseases including oral cancer and cardiovascular disease.Periodontitis is one of the most common type of periodontal d...Periodontal disease is the leading cause of tooth loss,which is also a high-risk factor for other diseases including oral cancer and cardiovascular disease.Periodontitis is one of the most common type of periodontal diseases.Interleukin-1β(IL-1β)plays a key role in the pathogenesis of periodontitis.However,the mechanism how IL-1βis produced during periodontitis is still unclear.In the present study,we found that humanβ-defensin 2(hBD2)enhances IL-1βproduction through an LPS-primed human acute monocytic leukemia(THP-1)macrophage model.Inhibition of P2X purinoceptor 7(P2X7)reduced hBD2-enhanced IL-1βproduction.Incubation of LPS-primed THP-1 macrophages with potassium chloride also suppressed hBD2-enhanced IL-1βproduction.Silence of inflammasome adaptor Nod-like receptor family pyrin domain containing 3(NLRP3)led to reduced hBD2-enhanced IL-1βproduction.Likewise,inhibition of caspase-1 also resulted in the decrease of IL-1β.Moreover,an ethidium bromide uptake test indicated that hBD2-activated caspase-1 mediated pyroptotic pore formation.Subsequent lactate dehydrogenase detection and flow cytometric analysis indicated that hBD2 also induced pyroptosis.In brief,these findings illustrated not only the mechanism of hBD2 in enhancing the inflammatory response,but also provided novel therapeutic targets for periodontitis.展开更多
Antiserum against PreS2 peptide was raised with a synthetic polypeptide from the rabbits.The anti-preS2 antibody and polymerized human serum albumin were used as reagents in aradioimmunoassay to detect preS2 and polym...Antiserum against PreS2 peptide was raised with a synthetic polypeptide from the rabbits.The anti-preS2 antibody and polymerized human serum albumin were used as reagents in aradioimmunoassay to detect preS2 and polymerized human serum albumin bindingactivity respectively. Both were absent in patients with hepatitis A or HBsAg negative chronic liver di-seases. In biopsy - proven patients with chronic active hepatitis (CAH)B, prevalences of bothmarkers were significantly higher at exacerbation that at remission stage of the disease, and so werein CAH than in chronic asymptomatic HBV carrier (AsC) with normal histology. Besides, the pre-valences were significantly higher in HBeAg positive group than in anti-HBe positive group.However, the polymerized human serum albumin binding activity and the preS2 were undoubtedlynot the same, as the prevalence of the latter was only 56.7% of the former.展开更多
Incorporation of synthetic heme(FeP) into recombinant human serum albumin(rHSA) provides an artificial hemoprotein(rHSA-FeP) which can bind and release oxygen reversibly under physiological conditions(in aqueous media...Incorporation of synthetic heme(FeP) into recombinant human serum albumin(rHSA) provides an artificial hemoprotein(rHSA-FeP) which can bind and release oxygen reversibly under physiological conditions(in aqueous media, pH 7.3, 37 ℃) like hemoglobin(Hb) and myoglobin. An rHSA host absorbs maximally eight FeP molecules, and the solution properties are almost identical to those of rHSA itself. The second-order structure and surface charge distribution of rHSA were always constant independent of the binding numbers of FeP. Its O 2-binding ability satisfies the initial clinical requirements for red cell substitute. Although the NO-binding affinity is 8-fold high compared to the Hbs, administration of this fluid into rats showed negligible change in the blood pressure. Physiological responses to exchange transfusion with this rHSA-FeP into anaesthetized rats have also been evaluated.展开更多
基金This work was supported by National Natural Science Foundation of China(NSFC)(81500871)Natural Science Foundation of Guangdong Province(2016A030310214).
文摘Periodontal disease is the leading cause of tooth loss,which is also a high-risk factor for other diseases including oral cancer and cardiovascular disease.Periodontitis is one of the most common type of periodontal diseases.Interleukin-1β(IL-1β)plays a key role in the pathogenesis of periodontitis.However,the mechanism how IL-1βis produced during periodontitis is still unclear.In the present study,we found that humanβ-defensin 2(hBD2)enhances IL-1βproduction through an LPS-primed human acute monocytic leukemia(THP-1)macrophage model.Inhibition of P2X purinoceptor 7(P2X7)reduced hBD2-enhanced IL-1βproduction.Incubation of LPS-primed THP-1 macrophages with potassium chloride also suppressed hBD2-enhanced IL-1βproduction.Silence of inflammasome adaptor Nod-like receptor family pyrin domain containing 3(NLRP3)led to reduced hBD2-enhanced IL-1βproduction.Likewise,inhibition of caspase-1 also resulted in the decrease of IL-1β.Moreover,an ethidium bromide uptake test indicated that hBD2-activated caspase-1 mediated pyroptotic pore formation.Subsequent lactate dehydrogenase detection and flow cytometric analysis indicated that hBD2 also induced pyroptosis.In brief,these findings illustrated not only the mechanism of hBD2 in enhancing the inflammatory response,but also provided novel therapeutic targets for periodontitis.
文摘Antiserum against PreS2 peptide was raised with a synthetic polypeptide from the rabbits.The anti-preS2 antibody and polymerized human serum albumin were used as reagents in aradioimmunoassay to detect preS2 and polymerized human serum albumin bindingactivity respectively. Both were absent in patients with hepatitis A or HBsAg negative chronic liver di-seases. In biopsy - proven patients with chronic active hepatitis (CAH)B, prevalences of bothmarkers were significantly higher at exacerbation that at remission stage of the disease, and so werein CAH than in chronic asymptomatic HBV carrier (AsC) with normal histology. Besides, the pre-valences were significantly higher in HBeAg positive group than in anti-HBe positive group.However, the polymerized human serum albumin binding activity and the preS2 were undoubtedlynot the same, as the prevalence of the latter was only 56.7% of the former.
文摘Incorporation of synthetic heme(FeP) into recombinant human serum albumin(rHSA) provides an artificial hemoprotein(rHSA-FeP) which can bind and release oxygen reversibly under physiological conditions(in aqueous media, pH 7.3, 37 ℃) like hemoglobin(Hb) and myoglobin. An rHSA host absorbs maximally eight FeP molecules, and the solution properties are almost identical to those of rHSA itself. The second-order structure and surface charge distribution of rHSA were always constant independent of the binding numbers of FeP. Its O 2-binding ability satisfies the initial clinical requirements for red cell substitute. Although the NO-binding affinity is 8-fold high compared to the Hbs, administration of this fluid into rats showed negligible change in the blood pressure. Physiological responses to exchange transfusion with this rHSA-FeP into anaesthetized rats have also been evaluated.
