catena-Poly[1,1′-dimethyl-4,4′-(ethane-1,2-di­yl)dipyridinium [lead(II)-tri-μ-iodido-lead(II)-tri-μ-iodido]]

The title compound, {(C14H18N2)[Pb2I6]}n, consists of discrete 1,1′-dimethyl-4,4′-(ethane-1,2-di­yl)dipyridinium cations and one-dimensional [Pb2I6]n anions. The organic cation has an inversion center at the mid-point of the ethane C—C bond. In the anion, the PbII atom is coordinated by six I atoms in a distorted octa­hedral geometry. The I atoms bridge the PbII atoms into a polymeric chain running along [001]. These inorganic chains are separated by the isolated organic cations

Evaluation of the comparative influence of magnesium sulfate single and combination with ritodrine hydrochloride in the prevention of preterm delivery

This project was designed to explore the effects of ritodrine hydrochloride combined with magnesium sulfate in the prevention of preterm delivery of patients with threatened premature birth. 128 cases of threatened premature birth were randomly divided into two groups according to the number table method. The control group was treated with magnesium sulfate, while the study group was treated with ritodrine hydrochloride combined with magnesium sulfate. The d(p>0.05). ata was analyzed using SPSS 18.0 and was subjected to Chi-square and t test. The onset time and prolonged gestation time of the study group were shorter than those of the control group (p0.05). The heart rate per minute of the study group was higher than that of the control group (p<0.05). There was no difference in blood pressure between the study group and the control group Nevertheless, the neurological function, pregnancy outcome and neonatal status of the group were better than those of the control group (p<0.05)

Posttranslational modifications of CXCR4: implications in cancer metastasis

CXCR4, the most widely expressed chemokine receptor in solid malignancies, has been implicated in cancer metastasis. However, how the activity of CXCR4 is regulated during carcinogenesis especially at the metastatic stage remains largely unknown. As with other G protein-coupled receptors, CXCR4 is subjected to posttranslational medications such as phosphorylation, ubiquitination, glycosylation, and sulfation. These posttranslational modifications contribute significantly to the heterogeneity of CXCR4 in terms of intracellular location, signaling, and functionality. We have shown that the difference in the sulfation level of CXCR4 is responsible for, if not all, the difference in the activities of CXCR4 between the highly metastatic and non-metastatic nasopharyngeal carcinoma (NPC) cell lines. Molecular mechanistic studies revealed that the Epstein-Barr virus-encoded oncoprotein LMP1 induces the expression of tyrosylprotein sulfotransferase 1 (TPST-1) through nuclear translocation of the epidermal growth factor receptor. This LMP1-regulated TPST-1 expression accounts for tyrosine sulfation of CXCR4 and is associated with the metastatic phenotype of NPC cell lines. Finally, in NPC patient specimens, there was a positive correlation between the expression of LMP1 and TPST-1 and the metastatic potential of NPC. Our findings provide the first evidence that the posttranslational modification of a chemokine receptor plays a role in cancer metastatic progression. Understanding the role of posttranslational modifications of chemokine receptors in cancer biology may provide new insights for developing attractive therapeutic targets in cancer therapy

Effects of Bi³⁺ Doping on the Optical and Electric-Induced Light Scattering Performance of PLZT (8.0/69/31) Transparent Ceramics

Lanthanum modified lead zirconate titanate (abbreviated as PLZT) Electro-Optical ceramics with various Bi concentration were prepared by a hot-press process. The PLZT ceramic samples all present a single perovskite structure with no second phase detected. Bi3+ ion was considered to mainly enter the A-site of perovskite ABO3 structure of PLZT ceramics by the X-Ray Diffractionanalysis. The maximum permittivity (&#949;m) of the PLZT samples decreased obviously as Bi concentration increased, while their remnant polarization (Pr) decreased slightly. In particular, the PLZT sample with 0.14 wt% Bi doping presented a higher optical transmittance 61.8% (&#955; = 633 nm), and its electric-induced light scattering performance was found to be improved obviously, the maximum light deduction value of ~47.6% was obtained

Characterization of Metabolite Landscape Distinguishes Medicinal Fungus <i>Cordyceps sinensis</i> and other <i>Cordyceps</i> by UHPLC-Q Exactive HF-X Untargeted Metabolomics

Cordyceps represent a valuable class of medicinal fungi with potential utilization. The overexploitation and resource scarcity of Cordyceps sinensis (CS) have led to the emergence of Cordyceps such as Cordyceps militaris (CM) and Cordyceps cicadae (CC) as substitutes. The medicinal value of CS is often considered superior to other Cordyceps, potentially owing to differences in active ingredients. This study aimed to evaluate the differences in the composition and abundance of the primary and secondary metabolites of CS and its substitutes by untargeted metabolomics. A total of 4671 metabolites from 18 superclasses were detected. CS and its substitutes were rich in amino acids, lipids, organic acids, and their derivatives. We statistically analyzed the metabolites and found a total of 285 differential metabolites (3′-Adenylic acid, O-Adipoylcarnitine, L-Dopachrome, etc.) between CS and CC, CS and CM, and CM and CC, which are potential biomarkers. L-glutamate and glycerophospholipids were differential metabolites. A KEGG enrichment analysis indicated that the tyrosine metabolic pathway and tryptophan metabolism pathway are the most differentially expressed pathways among the three Cordyceps. In contrast, CS was enriched in a higher abundance of most lipid metabolites when compared to CM and CC, which may be an indispensable foundation for the pharmacological functions of CS. In conclusion, systematic, untargeted metabolomics analyses for CS and other Cordyceps have delivered a precious resource for insights into metabolite landscapes and predicted potential components of disease therapeutics