Objective To observe the effect of ligustrazine injection combined with chemotherapy on common immunological parameters in patients with advanced hepatocellular carcinoma.Methods Eighty cases diagnosed with advanced hepatocellular carcinoma from January 2013 to January 2015 in the hospital were randomly divided into observation group and control group, 40 patients in each group.The control group received only conventional treatment of chemotherapy and observation group received ligustrazine injection on the basis of control group.The levels of interleukin-1 (IL-1), IL-4 and transforming growth factor beta ( TGF-β) wwere compared based on the record between two groups pre-and post-treatment.Results There were no significant differences between two groups in IL-1,IL-4 and TGF-βlevels pre-treatment.After treatment, the IL-1, IL-4 and TGF-βlevels in observation group were lower than those in control group [(41.4 ±11.8)vs (76.0 ±12.2)ng/L,(118.5 ±39.9)vs(223.0 ±47.3)ng/L,(6.7 ±3.2)vs(11.7 ± 2.6)ng/mL, respectively, all P<0.05].Conclusion Ligustrazine injection combined with chemotherapy has an exact effect on improving the immunological parameters associated with advanced hepatocellular carcinoma without significantly increasing side effects, it is worthy of further research and application.

Specific to the existing problems of uneven distribution of resources in the medical industry,especially the shortage of grass-root high-quality medical resources,the paper introduces the construction objective,overall architecture and construction contents of regional medical collaboration,and normalizes the medical service process through informationalized technological means,in order to promote standardized construction of the regional medical information system and information interconnection and intercommunication.

Objective: To study the dosimetric characteristics and plan quality of PTV-based intensity modulated proton radiotherapy (IMPT) and volumetric-modulated arc therapy (VMAT) plans for prostate cancer, so as to provide a reference for clinical application. Methods: A total of 10 prostate cancer cases were included in this retrospective study. IMPT and RapidArc plans were designed by RayStation and Eclipse TPS based on PTV, respectively. For each case, IMPT plans were generated using multiple field optimization (MFO) technique with two parallel-opposed lateral fields, whereas RapidArc plans were generated using double-arc technique (two full arcs). Final dose calculation of IMPT was conducted by pencil beam(PB) and Monte Carlo (MC) algorithm, respectively, with adopted data model from the pencil beam scanning (PBS) proton therapy system of IBA Protues Plus(IBA Group, Belgium); The data model originated from the linear accelerator of Varian Clinac iX (Varian Medical Systems, America) was used for RapidArc plans. Dosimetric parameters of DVH and dose distribution were used to compare the dose differences in targets and organs at risk (OARs) between these two treatment techniques. Results: For targets, HIs of PB-IMPT and MC-IMPT were slightly better than that of RapidArc , but CI of IMPT was slightly lower than that of RapidArc; D_1% of PB-IMPT was significantly better than those of MC-IMPT and RapidArc (Z=-2.805, -2.803, P<0.05). PB-IMPT and MC-IMPT achieved better protection than RapidArc on rectum V₃₀(Z=-2.191, -1.988, P<0.05)and D_mean(Z=-2.599, -2.497, P<0.05), bladder V₃₀(Z=-2.701, -2.701, P<0.05), V₄₀(Z=-2.395, -2.395, P<0.05)and D_mean(Z=-2.701, -2.701, P<0.05). There was no significant difference between PB-IMPT and MC-IMPT plans for prostate cancer, except for the D_1% [(73.86±67.34) Gy vs.(75.45±2.01) Gy] (RBE) and HI [(0.040±0.010) vs. (0.058±0.020)] of the target. Conclusions Both techniques can meet the clinical requirements, but IMPT showed significant dosimetric advantages compared with RapidArch by reducing the dose to OARs and improving the plan quality.

Objective To study the dietary nourishment of adult patients with leukemia and compare acute leukemic patients with chronic leukemic patients. Methods Adopting dietary review of 24 hours and seven consecutive days of dietary records method to obtain the food category and quantity of 122 patients with acute leukemia and 10 patients with chronic leukemia. Using statistic software SPSS11.0 to calculate the patients'intake of various kinds of nutfiments. and the difiences between acute and chronic leukemic patients were analyzed. Results The rate of most ontrients of patients'intake reaches RNI/AI is lower,especially vitamin A,vitamin C and caleium.There's a tendency that intake diet,energy and nourishments of acute leukemic patients is lower than that of those chronic leukemic patients. Conclusion There is a tendency of unbalanced dietary intakes in leukemic patients.including the low intakes.There is the tendency that nutritional status of acute leukemic patients iS poorer than that of chronic leukemic patients.

Objective:To explore the clinical value of metagenomics next-generation sequencing (mNGS) in the diagnosis of urinary calculi with secondary infection.Methods:From September 2021 to May 2022, a total of 110 urinary calculi patients from the First People′s Hospital of Zhejiang Province Tonglu County were collected retrospectively, the urine sample of the patients with bacterial meningitis was measured by urine bacterial culture and mNGS respectively. Taking urine bacterial culture as the "gold standard", the sensitivity, specificity, positive predictive value, negative predictive value, and Kappa consistency of mNGS in the diagnosing of urinary calculi with secondary infection were analyzed. Results:The positive of urine bacterial culture were 35 cases and negative were 75 cases; while positive and negative were 39 cases and 71 cases in the mNGS detection. Taking urinary bacterial culture as the "gold standard", the specificity, sensitivity, positive predictive value, negative predictive value and Kappa consistency coefficient of mNGS in the diagnosis of secondary infection of urinary calculi were 89.3%, 88.6%, 79.5%, 94.4% and 0.756 respectively. Compared with urine bacterial culture, the Kappa consistency coefficients of three common pathogens detected by the mNGS of macrogenomics, included escherichia coli, klebsiella pneumoniae and enterococcus faecalis were 0.703, 0.735 and 0.769, respectively. Conclusions:mNGS can improve the detection rate of pathogens of secondary infection of urinary calculi, and has a high consistency with the detection results of urinary bacterial culture.

ObjectiveTo establish a noninvasive diagnostic model for liver fibrosis in chronic hepatitis B （CHB） patients with normal alanine aminotransferase （ALT） and an age of ≤30 years by selecting specific indicators from the commonly used noninvasive indicators such as clinical， biochemical， and imaging indicators， to avoid invasive liver biopsy in such patients to some extent， and to guide the timing of antiviral therapy. MethodsA total of 251 CHB patients with normal ALT and an age of ≤30 years who underwent liver biopsy in Shenzhen Third People’s Hospital and The First Hospital of Changsha from January 2019 to January 2022 were enrolled， with 175 patients in the model group and 76 patients in the validation group， and commonly used clinical indicators were obtained based on clinical experience and related articles. The two-independent-samples t test or the two-independent-samples Mann-Whitney U rank sum test was used for comparison of continuous data between groups， and the chi-square test was used for comparison of categorical data between groups. A Spearman rank correlation analysis was used to investigate the correlation between each indicator and liver fibrosis and identify the indicators with correlation （P<0.01， r>0.200）； a Logistic regression analysis was used to establish a noninvasive diagnostic model， and the receiver operating characteristic （ROC） curve was used to evaluate its performance and perform validation of the model； this model was then compared with the widely used models of aspartate aminotransferase-to-platelet ratio index （APRI） and fibrosis-4 （FIB-4）. The Kappa consistency test was used to investigate the consistency of pathological results. ResultsA total of 17 commonly used clinical indicators were obtained， among which 9 indicators （ALT， aspartate aminotransferase ［AST］， gamma-glutamyl transpeptidase ［GGT］， ferritin ［FERR］， platelet count ［PLT］， procollagen type Ⅲ amino-terminal peptide ［PⅢP］， collagen Ⅳ ［CⅣ］， HBV DNA， and spleen thickness） were correlated with liver fibrosis （P<0.01， r>0.232）. Based on the above indicators， the predictive model was established as P=1/（1+e^-γ）， γ=-1.902+0.106×AST－0.011×PLT－0.265×HBV DNA+0.059×PⅢP， in which P was the probability for predicting ≥S2 liver fibrosis and γ was the predictive index. The comparison between each indicator and the model showed that the model had the largest area under the ROC curve of 0.852， with a sensitivity of 92.7% and a specificity of 76.9%. The model was validated in 76 patients and showed an accuracy of 77.600%. The model was compared with APRI and FIB-4， and the results showed that the model has good accuracy. ConclusionCompared with the models of APRI and FIB-4 commonly used in the world， this model can more accurately judge the degree of liver fibrosis in such patients， thereby replacing liver biopsy to some extent and guiding the timing of antiviral therapy.

Rolling circle amplification is a rapid, sensitive and isothermal single-stranded DNA amplification technique that can be used with staining or probes to amplify the detection signal. This technology has been widely used in biological detection and other aspects. The present paper introduces how to design rolling circle amplification, summarize its application in the detection of pathogens, nucleic acid tumor markers, proteins, biological small biomolecules, and viruses in recent years and prospects for future development.
DNA, Single-Stranded ; Nucleic Acid Amplification Techniques

Flash radiotherapy is a kind of radiotherapy method using ultra-high dose rate radiation. Compared with the traditional dose rate radiotherapy, it has unique radiobiological advantages. In this paper, the principle of flash radiotherapy, the process and results of biological experiments are summarized. At the same time, the advantages and challenges of flash radiotherapy are analyzed, and the future clinical application is prospected.
Radiotherapy/methods* ; Radiotherapy Dosage ; Technology

Agarwood is a traditional and precious medicinal material and natural spice in China and other southeast Asian countries.As the head of all spices,agarwood has many pharmacological activities such as analgesia,antidiarrheal,anti-inflammatory and antibacterial effects. Due to its high price and scarce resources,there were just a few previous studies on it,mainly focusing on the chemical compositions of the agarwood essential oil and solvent extract mixture. The components of agarwood oils obtained by supercritical extraction and steam distillation were analyzed by using Gas Chromatography-Mass Spectrometer( GC-MS),and then the agarwood oils compositions and contents were compared between the traditional extraction method and the recently emerging supercritical extraction method. Antioxidant experiments of scavenging DPPH,ABTS,hydroxyl radical,total reducing power and MIC experiments of five kinds of tester strains such as staphylococcus aureus were combined to illustrate the differences between these two kinds of agarwood oils in terms of antioxidant and bacteriostatic activities. The results showed that the main components of agarwood oil were sesquiterpenoids( 68. 68%) in steam distillation extraction method,but sesquiterpenoids( 23. 78%) and chromones( 29. 42%) in supercritical extraction method. Fourteen common components included benzyl acetone,α-santalol,γ-eudesmol,agarospirol and guaiol etc. The antioxidant activity and inhibitory MIC of agarwood oils in supercritical extraction method were better than those in steam distillation method,and the inhibitory effect of agarwood oil on the growth of bacillus subtilis was found for the first time.
Anti-Bacterial Agents/pharmacology* ; Antioxidants/pharmacology* ; China ; Distillation/methods* ; Oils, Volatile/pharmacology* ; Plant Oils/pharmacology* ; Steam ; Thymelaeaceae/chemistry* ; Wood/chemistry*

OBJECTIVE To investigate the variations in taste， aroma and volatile organic compounds of Rhei Radix et Rhizoma decoction pieces derived from different sources， and to identify their origins. METHODS The flavor， odor and volatile organic compounds of Rhei Radix et Rhizoma decoction pieces from different sources were compared and analyzed by using electronic tongue， electronic nose， and gas chromatography-ion mobility spectrometry （GC-IMS）. Principal component analysis （PCA）， partial least squares-discriminant analysis （PLS-DA）， orthogonal partial least squares discriminant analysis （OPLS-DA） and Fisher discriminant analysis were employed to identify the origins of Rhei Radix et Rhizoma decoction pieces and establish the basis discrimination criteria. RESULTS The differences in taste of Rhei Radix et Rhizoma decoction pieces from 3 origins were primarily characterized by bitterness， astringency， and bitter-astringent aftertaste. In terms of smell， variations were mainly observed in inorganic sulfides， organic sulfides containing aromatic components， methane and other short-chain alkanes， alcohols， ethers， aldehydes and ketones， as well as nitrogen oxides. Differentially volatile organic compounds mainly consisted of alcohols， aldehydes and ketones. Furthermore， the samples from 8 batches could be effectively classified into 3 categories.Three types of Rhei Radix et Rhizoma decoction pieces can be effectivily identified based on the peak intensity ratio between volatile substances. For example， when the peak intensity of 2-acetylfuran was 3-19 times that of isobutyric acid [dimer]， it was considered as Rheum officinale Baill. CONCLUSIONS The discriminant models established in this study， along with the criteria for determining the origins based on the peak intensity ofcharacteristic volatile compounds， can be utilized for the identification of Rhei Radix et Rhizoma decoction pieces.