The IR spectrum and 11B and 27Al MAS NMR spectra of Al18B4O33 are presented and discussed in relation to the possible existence of boron atoms substituting for aluminum atoms. The IR spectrum shows that the strong vi...The IR spectrum and 11B and 27Al MAS NMR spectra of Al18B4O33 are presented and discussed in relation to the possible existence of boron atoms substituting for aluminum atoms. The IR spectrum shows that the strong vibrations of the BO3 groups are present in the 1 500-1 200 cm-1 region, and very weak bands of BO4 units are present in the region from 1 000 to 1 100 cm-1. 11B MAS NMR spectrum indicates that the strong signal for BO3 units appears in the region from δ+5 to δ+20, and the very weak signal for BO4 units is at about δ- 1, while 27Al MAS NMR spectrum shows five peaks at about δ+62, +42. 1, +14, -4. 7 and -6. 4, originating from AlO4, AlO4, AlO5, AlO6 and AlO6, respectively. These results reveal that there are minor BO4 units in Al18B4O33, indicating that a small amount of B atoms substitute for Al atoms in the 4-fold coordination.展开更多
Background and Aims:We previously reported that carboxylesterase 1(CES1)expression was suppressed following liver injury.The study aimed to explore the role of interleukin(IL)-33 in liver injury and examine the mechan...Background and Aims:We previously reported that carboxylesterase 1(CES1)expression was suppressed following liver injury.The study aimed to explore the role of interleukin(IL)-33 in liver injury and examine the mechanism by which IL-33 regulates CES1.Methods:IL-33 and CES1 levels were determined in the livers of patients and lipopolysaccharide(LPS)-,acetaminophen(APAP)-treated mice.We constructed IL-33 and ST2 knockout(KO)mice.ST2-enriched immune cells in livers were screened to identify the responsible cells.Macrophage-derived exosome(MDE)activity was tested by adding exosome inhibitors.Micro-RNAs(miRs)were extracted from control and IL-33-stimulated MDEs(IL-33-MDEs)and subjected miR sequencing(miR-Seq).Candidate miR was tested in vitro and in vivo and its binding of a target gene was assessed by luciferase reporter assays.Lentivirus-vector cellular transfection and transcript silencing were used to examine pathways mediating IL-33 suppression of miR-27b-3p.Results:Patient liver IL-33 and CES1 expression levels were inversely correlated.CES1 downregulation in liver injury was rescued in both IL-33–deficient and ST2 KO mice.Macrophages were shown to be responsible for IL-33 effects.IL-33-MDEs reduced CES1 levels in hepatocytes.Exosomal miR-Seq and qRT-PCR demonstrated increased miR-27b-3p levels in IL-33-MDEs;miR-27b-3p was implicated in Nrf2 targeting.IL-33 inhibition of miR-27b-3p was found to be GATA3-dependent.Conclusions:IL-33–ST2–GATA3 pathway signaling increases miR-27b-3p content in MDEs,which upon being internalized by hepatocytes reduce CES1 expression by inhibiting Nrf2.The elucidation of this mechanism in this study contributes to a better understanding of CES1 dysregulation in liver injury.展开更多
目的探讨1L-27对支气管哮喘（简称哮喘）患者干扰素y（lFN-γ）及1L-33的调节作用。方法选择56例非细菌性感染所致中-重度哮喘患者为试验病例组，整群匹配方法选择30名正常者为对照组，酶联免疫吸附试验法检测1L-27、干扰素y（IFN-y）、...目的探讨1L-27对支气管哮喘（简称哮喘）患者干扰素y（lFN-γ）及1L-33的调节作用。方法选择56例非细菌性感染所致中-重度哮喘患者为试验病例组，整群匹配方法选择30名正常者为对照组，酶联免疫吸附试验法检测1L-27、干扰素y（IFN-y）、1L-33水平，全血细胞分析仪检测白细胞数、中性校细胞绝对值、嗜酸粒细胞绝对值;同时收集哮喘组患者外周血单个核细胞（PBMC）.加入不同浓度的（5μgiL或0.5μgiL）重组人白介素27（rh1L-27）进行体外培养12 h.酶联免疫吸附试验法检测其培养 上清1FN-y及1L-33浓度;探讨1L-27对1FN-γ、1L-33的影响及各指标间的相关性。结果哮喘组患者血清1L-33较对照组明显升高（t=34. 53. P 〈0. 05）.哮喘组1FN-γ、1L-27水平较对照组明显降低 （ t IFN-γ=27.52. P IFNγ〈0.01; t IL-27 = 32.77 ？ P IL-27 〈0.01） ;不同浓度的rh1L-27刺激PBMC后进行体 外培养后.IFN-y表达分别为[（85.9±12. 1）μgiL.（19.6± 3.2）μgl日，较细胞剌激素组（11. 3±2. 7）μgiL 均有显著升高（t = 34.57. P 〈0. 01; t = 11. 39. P 〈0. OIL 5μgiL rh 1L-27组1L-33表达较对照组有 明显降低[（33.2士11.8）μgiL vs 016.9土17.的μgiL. t =22.69. P 〈0. 01];哮喘患者1FNγ水平变 化与rh1L-27应用剂量呈正相关性（ r = 0. 949. P 〈 0. 0日，而rh 1L-27与1L-33呈负相关性（r = 0.89. P 〈0. 05）。结论 1L-27、1FN-y、1L-33表达水平间存在一定关联强度。展开更多
基金Supported by the National Natural Science Foundation of China.
文摘The IR spectrum and 11B and 27Al MAS NMR spectra of Al18B4O33 are presented and discussed in relation to the possible existence of boron atoms substituting for aluminum atoms. The IR spectrum shows that the strong vibrations of the BO3 groups are present in the 1 500-1 200 cm-1 region, and very weak bands of BO4 units are present in the region from 1 000 to 1 100 cm-1. 11B MAS NMR spectrum indicates that the strong signal for BO3 units appears in the region from δ+5 to δ+20, and the very weak signal for BO4 units is at about δ- 1, while 27Al MAS NMR spectrum shows five peaks at about δ+62, +42. 1, +14, -4. 7 and -6. 4, originating from AlO4, AlO4, AlO5, AlO6 and AlO6, respectively. These results reveal that there are minor BO4 units in Al18B4O33, indicating that a small amount of B atoms substitute for Al atoms in the 4-fold coordination.
基金supported by the National Natural Science Foundation of China(81670521 and 81803798).
文摘Background and Aims:We previously reported that carboxylesterase 1(CES1)expression was suppressed following liver injury.The study aimed to explore the role of interleukin(IL)-33 in liver injury and examine the mechanism by which IL-33 regulates CES1.Methods:IL-33 and CES1 levels were determined in the livers of patients and lipopolysaccharide(LPS)-,acetaminophen(APAP)-treated mice.We constructed IL-33 and ST2 knockout(KO)mice.ST2-enriched immune cells in livers were screened to identify the responsible cells.Macrophage-derived exosome(MDE)activity was tested by adding exosome inhibitors.Micro-RNAs(miRs)were extracted from control and IL-33-stimulated MDEs(IL-33-MDEs)and subjected miR sequencing(miR-Seq).Candidate miR was tested in vitro and in vivo and its binding of a target gene was assessed by luciferase reporter assays.Lentivirus-vector cellular transfection and transcript silencing were used to examine pathways mediating IL-33 suppression of miR-27b-3p.Results:Patient liver IL-33 and CES1 expression levels were inversely correlated.CES1 downregulation in liver injury was rescued in both IL-33–deficient and ST2 KO mice.Macrophages were shown to be responsible for IL-33 effects.IL-33-MDEs reduced CES1 levels in hepatocytes.Exosomal miR-Seq and qRT-PCR demonstrated increased miR-27b-3p levels in IL-33-MDEs;miR-27b-3p was implicated in Nrf2 targeting.IL-33 inhibition of miR-27b-3p was found to be GATA3-dependent.Conclusions:IL-33–ST2–GATA3 pathway signaling increases miR-27b-3p content in MDEs,which upon being internalized by hepatocytes reduce CES1 expression by inhibiting Nrf2.The elucidation of this mechanism in this study contributes to a better understanding of CES1 dysregulation in liver injury.
文摘目的探讨1L-27对支气管哮喘（简称哮喘）患者干扰素y（lFN-γ）及1L-33的调节作用。方法选择56例非细菌性感染所致中-重度哮喘患者为试验病例组，整群匹配方法选择30名正常者为对照组，酶联免疫吸附试验法检测1L-27、干扰素y（IFN-y）、1L-33水平，全血细胞分析仪检测白细胞数、中性校细胞绝对值、嗜酸粒细胞绝对值;同时收集哮喘组患者外周血单个核细胞（PBMC）.加入不同浓度的（5μgiL或0.5μgiL）重组人白介素27（rh1L-27）进行体外培养12 h.酶联免疫吸附试验法检测其培养 上清1FN-y及1L-33浓度;探讨1L-27对1FN-γ、1L-33的影响及各指标间的相关性。结果哮喘组患者血清1L-33较对照组明显升高（t=34. 53. P 〈0. 05）.哮喘组1FN-γ、1L-27水平较对照组明显降低 （ t IFN-γ=27.52. P IFNγ〈0.01; t IL-27 = 32.77 ？ P IL-27 〈0.01） ;不同浓度的rh1L-27刺激PBMC后进行体 外培养后.IFN-y表达分别为[（85.9±12. 1）μgiL.（19.6± 3.2）μgl日，较细胞剌激素组（11. 3±2. 7）μgiL 均有显著升高（t = 34.57. P 〈0. 01; t = 11. 39. P 〈0. OIL 5μgiL rh 1L-27组1L-33表达较对照组有 明显降低[（33.2士11.8）μgiL vs 016.9土17.的μgiL. t =22.69. P 〈0. 01];哮喘患者1FNγ水平变 化与rh1L-27应用剂量呈正相关性（ r = 0. 949. P 〈 0. 0日，而rh 1L-27与1L-33呈负相关性（r = 0.89. P 〈0. 05）。结论 1L-27、1FN-y、1L-33表达水平间存在一定关联强度。
