Objective To investigate the relationship between portal vein pressure and liver regeneration after 90% portal branch ligation in rats.Methods Forty-five male SD rats underwent 90% portal branch ligation (including 5 rats underwent sham operation),and then the changes of portal vein pressure and weight of unligated hepatic lobes were detected.The morphological changes of hepatocytes of the unligated hepatic lobes were observed under a light microscope.Proliferative cell nuclear antigen(PCNA)index was detected by immunohistochemistry,and hepatocyte apoptosis of the unligated hepatic lobes by TUNEL method.All data were analyzed by Pearson rank correlation analysis and t test.Results Thirty-eight out of 40 rats survived(95%).The ligated hepatic lobes diminished progressively,whereas the unligated hepatic lobes regenerated.Preoperative portal vein pressure was(9.1±1.8)cm H_2O(1 cm H_2O=0.098 kPa),and it was increased significantly shortly after the ligation and reached (15.8±2.7)cm H_2O 12 hours later(t=6.847,P＜0.05).The portal vein pressure decreased from(13.6±2.3)cm H_2O at day 1 to(9.3±2.0)cm H_2O at day 28.Preoperative positive PCNA index was 7%±3%,which was significantly lower than 14%±5%at postoperative 12 hours,21%±6%at day 3 and 26%±7%at day 5(t=9.129,P＜0.05),and it began to return to normal at day 5.Few apoptotic hepatoeytes were observed in preoperative liver tissue and unligated hepatic lobes.The expression of PCNA in unligated hepatic lobes and portal vein pressure had apositive correlation at postoperative day 1,3,5(r=0.913,0.896,0.908,P<0.05)and a negative correlation at postoperative day 14(r=-0.926,P<0.05).Conclusions The regeneration of hepatocytes in unligated hepatic lobes is activated after 90% portal branch ligation,and the regenerated liver compensates the weight loss of the ligated hepatic lobes.Liver is regenerated mainly by speeding hepatocyte proliferation rather than reducing hepatocyte apoptosis.Changes of portal vein pressure may play an important role in liver regeneration.

Objective T o analyse the genetic polym orphism s of 66 biallelic genetic m arkers on Y chro-m osom e in E astern C hinese H an population, and evaluate their values in forensic application. Methods G enotyping of 66 biallelic genetic m arkers on Y chrom osom e w as studied in 205 unrelated m ales of E astern C hinese H an population by m ultiplex PC R com bined m atrix-assisted laser desorption/ionization tim e-of-flight m ass spectrom etry (M A L D I-T O F-M S ). T he allele frequencies on the loci to be tested w ere calculated by direct counting m ethod, and the gene diversity (G D ) and haplotype diversity (H D ) w ere calculated by corresponding form ulas. T he haplotypes of this system w ere tested by softw are A rlequin v3.5.2.2 and the com parison of population genetics w ere analyzed. Results A total of 60 biallelic genetic m arkers on Y chrom osom e w ere polym orphic in m ales of E astern C hinese H an population, and the ranges of G D w ere from 0.0385 to 0.5019. E ighty-five different haplotypes w ere observed and the H D w as 0.9703. T he differences of partial SN P loci betw een the H an population of E astern C hina and that of X injiang and G uangdong w ere statistically significance. Conclusion Sixty biallelic genetic m arkers and the detection system can com plem entally provide genetic inform ation in kinship testing and individual identification. T he M A L D I-T O F-M S technology is able to type biallelic genetic m arkers.

Objective To study to take the oxidized Mannan?modified 786?0 in renal clear cell carcinom as tumor cells antigen to sensitize Dendrit?ic cells(DC)and to observe the its killing effect on renal clear cell carcinoma of CTLs induced. Methods Getting the peripheral blood mononucle?ar cells from the volunteers,and then to be stimulated to turn to be maturation by GM?CSF and IL?4 in vitro. Taking the clear renal carcinoma cell as the tumor antigen,and then making it to be modified by oxidized Mannan to acquire the tumor cell vaccine.Experimental groups include:blank group:DC?PBS group,control group:control?DC?786?0,experimental group:DC?Ox?Mannose?786?0 group. Taking the flow cytometry to detect the changes of DC phenotype,then taking the ELISA to detect the sencretion levels of supernatant of IL?12 of DC,then taking the CCK to detecte the cytotoxicity of lymphocytes(CTL)induced by DC of these experiment groups. Results Results by flow cytometry:the mature phenotype of DCs sensitized by Ox?Mannose?786?0 group included CD80,CD83,CD86 and HLA?DR expressed significantly higher than the other groups. As well as the secretion levels of IL?12. Meanwhile the cytotoxicity activity of lymphocytes(CTLs)induced by DCs which are sensitized by Ox?Mannose?786?0 increased more significantly than the other groups. Conclusion Glycosylated Antigens can be more effective in sensitizing antigen?presenting cells DC,and stimulating them to be maturation,while the killing effect to tumor cells also have noticeably improved.

OBJECTIVE:To compare the differences between artificially cultivated and wild Xinjiang Artemisia rupestris,and screen the different components. METHODS:HPLC-MS was adopted to establish the fingerprints of artificially cultivated and wild Xinjiang A. rupestris from different origin and harvest time. Principal component analysis was conducted by Marker ViewTM soft-ware and SIMCA-P 11.5 software,the characteristics of principal components were analyzed,difference variable was screened, and different components of artificially cultivated and wild varieties were obtained. RESULTS:Fingerprints of 22 batches of A. rup-estris(12 batches of wild varieties,10 batches of artificially cultivated varieties)were established. According to the principal com-ponent analysis,artificially cultivated and wild varieties were well grouped,with obvious differences;the principal components of artificially cultivated varieties with different harvest time showed certain difference,mainly before and after flowering,concentrat-ing in to-be flowering and full flowering periods. Wild varieties from different origins had obvious regional difference,showing cer-tain differences in composition and content. 268 variables were found in matrix of positive ion mode and 155 in negative ion mode. 28 groups of variables were extracted by difference variable,and 19 variables were determined. CONCLUSIONS:Artificially culti-vated and wild varieties have obvious difference in principal component,mainly in flowering period and picking places. It can pro-vide theoretical basis for the standardized cultivation and origin protection of Xinjiang A. rupestris.

OBJECTIVE:To establish the quality standard for Compound Lavandula angustifolia ointment. METHODS:TLC was used for the qualitative identification of ethanol extract from Scutellaria baicalensis and volatile oil of L. angustifolia. GC method was used for qualitative identification of dementholized peppermint oil. GC method was used to determine the content of menthol. The determination was performed on Agilent DB-WAX capillary column,with temperature programming. The injector temperature was 250℃,and the temperature of detector was 250℃.The injection volume was 1 μL and the split ratio was 5:1 by split sampling. RESULTS:TLC spots of ethanol extract of S. baicalensis and volatile oil of L. angustifolia were clear and well-repeated without interference from negative control. The chromatographic peaks in TLC of test samples of dementholized peppermint oil had same retention time as that of substance control.The linear range of menthol injection amount was 0.113 4-1.133 5μg (r=0.999 4). RSDs of precision,intra-day precision,stability and reproducibility tests were not higher than 2.0%. The recoveries were 95.40%-99.82%(RSD=1.61%,n=6). CONCLUSIONS:Established quality standard can be used for the quality control of Compound L.angustifolia ointment.

Objective To explore the extraction and purification method of Kupffer and hepatic stellate cells from mouse liver and provide references and suggestions for the separation and extraction method ology of primary non-parenchymal cells from mouse liver.Methods After in vivo collagenase perfusion digestion,various reagents and method,such as Percoll and OptiPrep,were used to extract C57BL/6 mice Kupffer and hepatic stellate cells,and evaluate their purity by flow cytometry and immunofluorescence.Results The two-layer Percoll method to extract Kupffer cells and the two-layer OptiPrep method to extract hepatic stellate cells were feasible,and purity reached>90%.The cell yield was 1～2×107/liver,and the cell survival rate was>90%.After 48 hours of primary cell culture,the number of F4/80-positive Kupffer cells and α-SMA-positive hepatic stellate cells reached>90%.Conclusions The separation and extraction method of Kupffer and hepatic stellate cells from mouse liver are perfect,reliable,cost-effective,and reproducible.

Objective To establish a high-performance liquid chromatography-tandem mass spectrometry(LC-MS/MS)method for the simultaneous determination of seven vitamin Bs(VBs)in rat plasma.Methods The plasma samples were pretreated using the protein precipitation method.The chromatographic separation was achieved using an Agilent ZORBAX SB-Aq column(2.1 mm×150 mm,3.5 μm),with a mobile phase composed of 0.01%formic acid(A)and methanol(B)in a gradient elution mode.The flow rate was set at 0.3 mL·min-1 and the column temperature was maintained at 30℃.Mass spectrometric detection was performed using positive ion mode in multiple reaction monitoring.2,4,5,6-Deuteronicotinamide was used as the internal standard.Results Methodological validation results showed that the lowest limits of quantitation(LOQs)for the seven VBs ranged from 7.5 to 300 ng/mL,while the highest LOQs ranged from 1 000 to 20 000 ng·mL-1.Within a certain concentration range,all compounds showed a good linearity(r2>0.992 2).The accuracies ranged from 86.0%to 117.6%,and both intra-and inter-batch precision were less than 20%.Additionally,all analytes demonstrated extraction recoveries greater than 86.1%.No significant matrix effects were observed,and the stability was good.The established validation method was successfully applied to the pharmacokinetics study of single intragastric administration of VB solution in SD rats.Conclusion The analytical method established in this study is simple,rapid,sensitive,and exclusive for the simultaneous determination of VB in real plasma samples.This LC-MS/MS method provides a new analytical tool for further exploring the physiological and pathological effects of VB.

Autologous fat grafting (AFG) is a new postoperative plastic technique for breast cancer. The safety of this technique in oncology is a controversial issue in academic circles. In some basic experiments, it was found that adipocytes could promote the proliferation of surrounding cancer cells through autocrine and paracrine. However, clinical trial data show that this procedure does not increase the risk of postoperative recurrence or metastasis of breast cancer. Nowadays, there are variety of researches on the safety of this technique, but many limitations are found in these trials. Therefore, to accurately assess the relevance of these studies to any realistic clinical risk, it is necessary to include large sample of clinical studies. In this paper, the data of basic experiments and clinical trials in recent ten years were collected, and the safety of oncology was further analyzed and discussed, which will provide reference for clinical decision-making of postoperative breast reconstruction.

To explore how to create and optimize a promotion index system of medical quality evaluation, this article focuses on the hospital visiting process from patients, using analyzing collected those index system from couples of Grade Ⅲ hospitals in Beijing, and combining the results of literal study, field study and specialist consult, according to the different situation of general hospitals and specially hospitals, with the spirit of "maintaining the patients benefits, safeguarding the patients safety,and enhancing the medical quality", introduces the framework of the promotion index system, the rules to select the indicator, and so on, and discusses several problerns related to creating the index system.

Objective:To examine the effect of anemia on the prognosis of elderly patients with acute coronary syndrome.Methods:We searched PubMed, Scopus, OVID, the Cochrane Library, Web of Science, Embase, China National Knowledge Infrastructure, China Biology Medicine Disc, the WanFang and Weipu databases for studies on the association between anemia and the prognosis of acute coronary syndrome in elderly patients.The date range included the period from the establishment of the database to December 10, 2022.Two reviewers independently completed the literature screening and data extraction according to the inclusion and exclusion criteria for the literature.Stata 16.0 software was used to analyze the data.Results:Of 1 399 references retrieved from the initial search, 13 met the inclusion criteria, including a total of 9540 patients with a mean age of 70.3 years.2872 of these patients had concurrent anemia and 6 668 patients had no anemia.In elderly patients with acute coronary syndrome, those with anemia showed significantly increased risk of death, compared with those with no anemia( RR=2.28, 95% CI: 1.74-3.00). Anemia also increased the incidence of ischemia( RR=1.36, 95% CI: 1.13-1.64)and bleeding events( RR=2.18, 95% CI: 1.59-3.01)( P<0.05 for all). Conclusions:Anemia significantly increases the risk of death and is associated with poor prognosis in elderly patients with acute coronary syndrome.