Association of peripheral blood pH early after birth with amplitude-integrated electroencephalography findings in neonates with intrauterine distress / 中国当代儿科杂志

OBJECTIVE@#To study the association of peripheral blood pH early after birth with amplitude-integrated electroencephalography (aEEG) findings in neonates with intrauterine distress.@*METHODS@#The clinical data of the neonates with intrauterine distress who were born from January 2017 to May 2018 were collected. According to peripheral blood pH within 30 minutes after birth, these neonates were divided into 3 groups: pH ≤7.15, 7.15 7.25, with 30 neonates in each group. aEEG mornitoring was performed within 6 hours after birth, and the abnormal rate of aEEG findings and average cerebral function monitoring (CFM) score were compared between groups.@*RESULTS@#The pH ≤7.15 group had a significantly higher abnormal rate of aEEG findings than the pH >7.25 group (P7.25 groups (P<0.05). Peripheral blood pH was positively correlated with the CFM score (r=0.26, P<0.05).@*CONCLUSIONS@#Peripheral blood pH is significantly associated with aEEG findings in neonates with intrauterine distress. Active measures should be adopted for the prevention and treatment of nervous system injury in neonates with intrauterine distress who have a significant reduction in peripheral blood pH early after birth (pH ≤7.15).

Comparison of bioavailability of two kinds of solid dispersion from 10-hydroxycamptothecin in SD rats in vivo / 中国中药杂志

To improve the bioavailability of 10-hydroxycamptothecin, 10-hydroxycamptothecin solid dispersion(HCPT-SD) and 10-hydroxycamptothecin-phospholipid complex-solid dispersion(HCPT-PC-SD) were prepared, and their solubility and dissolution rate were evaluated in this study. SD rates were administered intragastrically with HCPT-SD or HCPT-PC-SD respectively, then their blood samples were collected at different time intervals. The concentration of HCPT in blood was detected by HPLC method with camptothecin as internal standard, and then its pharmacokinetic parameters were calculated and obtained. The results showed that the Cmax, AUC0-t and AUC0-∞ of both kinds of solid dispersion of HCPT were significantly increased than those of crude drug. The AUC0-t of HCPT-SD was increased by 176.87%, and AUC0-t of HCPT-PC-SD was increased by 254.31% as compared with crude drug. Therefore, the two kinds of solid dispersion of HCPT could significantly enhance the bioavailability of HCPT in SD rates, and the effect of HCPT-PC-SD was more obvious.

Expression of the kisspeptin/kiss1r system in the hypothalamic arcuate nucleus of rats with diet-induced obesity and its influence on the hypothalamic-pituitary-testis axis / 中华男科学杂志

<p><b>OBJECTIVE</b>To explore the expressions and functions of the kisspeptin/kiss1r system and GnRH in the hypothalamic arcuate nucleus (HAN) and the influence of the kisspeptin/kiss1r system on the hypothalamic-pituitary-testis (HPT) axis in the rat models of diet-induced obesity.</p><p><b>METHODS</b>Ninety newborn SD male rats were randomly assigned to receive normal diet (n = 30) and high-fat diet (n = 60) for the establishment of obesity models. The model rats were again equally divided into a control group and an experimental group, the latter injected with kisspeptin via the lateral ventricle. Then the body mass index (BMI) and endocrine hormone levels of the rats were recorded, the protein expressions of LepR, kisspeptin, kiss1r, and GnRH in the HAN determined by immunohistochemistry and Western blot, and the levels of GnRH mRNA in the HAN measured by qRT-PCR.</p><p><b>RESULTS</b>Significantly increased BMI and hormone levels indicated the successful establishment of diet-induced obesity models. Compared with the normal rats, the protein expressions of LepR, kisspeptin, and GnRH in the HAN were markedly decreased in the controls, and that of GnRH and the levels of LH and T significantly increased, but the expressions of LepR and kiss1r showed no remarkable changes in the experimental rats.</p><p><b>CONCLUSION</b>Lateral ventricular injection of kisspeptin can upregulate obesity-induced low expression of GnRH, correct the dysfunction of the HPT axis, and thus improve reproductive function in rats.</p>

Expression and purification of spike protein of severe acute respiratory syndrome coronavirus in Saccharomyces cerevisiae / 中华传染病杂志

Objective To construct the recombinant plasmid pYES6-S and express and purify spike protein of severe acute respiratory syndrome(SANS)coronavirus in Saccharomyces cerevisiae. Methods DNA fragments of SANS coronavirus were obtained by reverse transeription.Four over- lapped fragments of spike protein genes were amplified by polymerase chain reaction(PCR)and ligated into an integral spike protein gene by restriction enzyme digestion.The spike protein gene recombined with pYES6 and cloned into E.coll.The recombinant plasmid pYES6-S was induced and expressed in Saccharomyces cerevisiae(INVScl)by galactose.Results The recombinant plasmid pYES6-S was confirmed that inserted fragment was right in length,direction and base matching by restriction enzyme digestion and sequencing.The purified protein encoded by the whole spike protein gene was about Mr 110?10~3 identified by electrophoresis.Conclusion The whole spike protein gene of SARS coronavirus is cloned into E.coli and the protein is expressed in Saccharomyces cerevisiae successful ly.which can be helpful in SARS vaccine research.

A study of genetic polymorphism of the STR locus D7S2846, D19S400 and D18S535 in Han population in Wenzhou / 法医学杂志

OBJECTIVE@#To study genetic polymorphism of D7S2846, D19S400 and D18S535 in Han population in Wenzhou.@*METHODS@#DNA was extracted with chelex-100 method from EDTA-blood samples of 194 unrelated individuals in Wenzhou and amplified with PCR technique. The PCR products were analyzed by PAG vertical electrophoresis and silver-stain.@*RESULTS@#6 alleles and 15 genotypes of D7S2846, 10 alleles and 36 genotypes of D19S400, 8 alleles and 26 genotypes of D18S535 was observed. The heterozygosities of the three loci are 0.644, 0.724 and 0.772; The power of discriminating are 0.854, 0.940 and 0.938.@*CONCLUSION@#The heterozygosities of the three loci are high and the frequencies was in accordance with Hardy-Weinberg equilibrium (P>0.05), so the three loci can be used in forensic medicine and in other genetic researches.

Polymorphism of STR loci D12S391/D18S865 in Wenzhou Han population / 法医学杂志

OBJECTIVE@#To investigate the polymorphism and forensic efficiency values of STR loci D12S391/D18S865@*METHODS@#Population studies on D12S391 and D18S865 were carried out in a sample of 454 unrelated Wenzhou Han individuals using PCR followed by PAGE and silver stain detection.@*RESULTS@#11/7 alleles and 50/21 genotypes of D12S391/D18S865 were respectively observed among the 454 unrelated individuals. The genotype frequency matched the Hardy-Weinberg equilibrium, The heterozygotes (H) in D12S391/D18S865 were 0.7974/0.7379, Power of Exclusion were 0.9566/0.9077, polymorphism information content (PIC) were 0.8260/0.7279 respectively.@*CONCLUSION@#D12S391 and D18S865 were high polymorphic loci and the frequencies were in accordance with Hardy-Weinberg equilibrium (P>0.5), so the two loci can be used in forensic medicine and in other genetic research areas.